diff options
Diffstat (limited to 'drivers/video/backlight')
60 files changed, 16413 insertions, 1065 deletions
diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c new file mode 100644 index 00000000000..7db5234462d --- /dev/null +++ b/drivers/video/backlight/88pm860x_bl.c @@ -0,0 +1,278 @@ +/* + * Backlight driver for Marvell Semiconductor 88PM8606 + * + * Copyright (C) 2009 Marvell International Ltd. + * Haojian Zhuang <haojian.zhuang@marvell.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/fb.h> +#include <linux/i2c.h> +#include <linux/backlight.h> +#include <linux/mfd/88pm860x.h> +#include <linux/module.h> + +#define MAX_BRIGHTNESS (0xFF) +#define MIN_BRIGHTNESS (0) + +#define CURRENT_BITMASK (0x1F << 1) + +struct pm860x_backlight_data { + struct pm860x_chip *chip; + struct i2c_client *i2c; + int current_brightness; + int port; + int pwm; + int iset; + int reg_duty_cycle; + int reg_always_on; + int reg_current; +}; + +static int backlight_power_set(struct pm860x_chip *chip, int port, + int on) +{ + int ret = -EINVAL; + + switch (port) { + case 0: + ret = on ? pm8606_osc_enable(chip, WLED1_DUTY) : + pm8606_osc_disable(chip, WLED1_DUTY); + break; + case 1: + ret = on ? pm8606_osc_enable(chip, WLED2_DUTY) : + pm8606_osc_disable(chip, WLED2_DUTY); + break; + case 2: + ret = on ? pm8606_osc_enable(chip, WLED3_DUTY) : + pm8606_osc_disable(chip, WLED3_DUTY); + break; + } + return ret; +} + +static int pm860x_backlight_set(struct backlight_device *bl, int brightness) +{ + struct pm860x_backlight_data *data = bl_get_data(bl); + struct pm860x_chip *chip = data->chip; + unsigned char value; + int ret; + + if (brightness > MAX_BRIGHTNESS) + value = MAX_BRIGHTNESS; + else + value = brightness; + + if (brightness) + backlight_power_set(chip, data->port, 1); + + ret = pm860x_reg_write(data->i2c, data->reg_duty_cycle, value); + if (ret < 0) + goto out; + + if ((data->current_brightness == 0) && brightness) { + if (data->iset) { + ret = pm860x_set_bits(data->i2c, data->reg_current, + CURRENT_BITMASK, data->iset); + if (ret < 0) + goto out; + } + if (data->pwm) { + ret = pm860x_set_bits(data->i2c, PM8606_PWM, + PM8606_PWM_FREQ_MASK, data->pwm); + if (ret < 0) + goto out; + } + if (brightness == MAX_BRIGHTNESS) { + /* set WLED_ON bit as 100% */ + ret = pm860x_set_bits(data->i2c, data->reg_always_on, + PM8606_WLED_ON, PM8606_WLED_ON); + } + } else { + if (brightness == MAX_BRIGHTNESS) { + /* set WLED_ON bit as 100% */ + ret = pm860x_set_bits(data->i2c, data->reg_always_on, + PM8606_WLED_ON, PM8606_WLED_ON); + } else { + /* clear WLED_ON bit since it's not 100% */ + ret = pm860x_set_bits(data->i2c, data->reg_always_on, + PM8606_WLED_ON, 0); + } + } + if (ret < 0) + goto out; + + if (brightness == 0) + backlight_power_set(chip, data->port, 0); + + dev_dbg(chip->dev, "set brightness %d\n", value); + data->current_brightness = value; + return 0; +out: + dev_dbg(chip->dev, "set brightness %d failure with return value: %d\n", + value, ret); + return ret; +} + +static int pm860x_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.state & BL_CORE_SUSPENDED) + brightness = 0; + + return pm860x_backlight_set(bl, brightness); +} + +static int pm860x_backlight_get_brightness(struct backlight_device *bl) +{ + struct pm860x_backlight_data *data = bl_get_data(bl); + struct pm860x_chip *chip = data->chip; + int ret; + + ret = pm860x_reg_read(data->i2c, data->reg_duty_cycle); + if (ret < 0) + goto out; + data->current_brightness = ret; + dev_dbg(chip->dev, "get brightness %d\n", data->current_brightness); + return data->current_brightness; +out: + return -EINVAL; +} + +static const struct backlight_ops pm860x_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = pm860x_backlight_update_status, + .get_brightness = pm860x_backlight_get_brightness, +}; + +#ifdef CONFIG_OF +static int pm860x_backlight_dt_init(struct platform_device *pdev, + struct pm860x_backlight_data *data, + char *name) +{ + struct device_node *nproot, *np; + int iset = 0; + + nproot = of_node_get(pdev->dev.parent->of_node); + if (!nproot) + return -ENODEV; + nproot = of_find_node_by_name(nproot, "backlights"); + if (!nproot) { + dev_err(&pdev->dev, "failed to find backlights node\n"); + return -ENODEV; + } + for_each_child_of_node(nproot, np) { + if (!of_node_cmp(np->name, name)) { + of_property_read_u32(np, "marvell,88pm860x-iset", + &iset); + data->iset = PM8606_WLED_CURRENT(iset); + of_property_read_u32(np, "marvell,88pm860x-pwm", + &data->pwm); + break; + } + } + of_node_put(nproot); + return 0; +} +#else +#define pm860x_backlight_dt_init(x, y, z) (-1) +#endif + +static int pm860x_backlight_probe(struct platform_device *pdev) +{ + struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); + struct pm860x_backlight_pdata *pdata = dev_get_platdata(&pdev->dev); + struct pm860x_backlight_data *data; + struct backlight_device *bl; + struct resource *res; + struct backlight_properties props; + char name[MFD_NAME_SIZE]; + int ret = 0; + + data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_backlight_data), + GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + res = platform_get_resource_byname(pdev, IORESOURCE_REG, "duty cycle"); + if (!res) { + dev_err(&pdev->dev, "No REG resource for duty cycle\n"); + return -ENXIO; + } + data->reg_duty_cycle = res->start; + res = platform_get_resource_byname(pdev, IORESOURCE_REG, "always on"); + if (!res) { + dev_err(&pdev->dev, "No REG resorce for always on\n"); + return -ENXIO; + } + data->reg_always_on = res->start; + res = platform_get_resource_byname(pdev, IORESOURCE_REG, "current"); + if (!res) { + dev_err(&pdev->dev, "No REG resource for current\n"); + return -ENXIO; + } + data->reg_current = res->start; + + memset(name, 0, MFD_NAME_SIZE); + sprintf(name, "backlight-%d", pdev->id); + data->port = pdev->id; + data->chip = chip; + data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion; + data->current_brightness = MAX_BRIGHTNESS; + if (pm860x_backlight_dt_init(pdev, data, name)) { + if (pdata) { + data->pwm = pdata->pwm; + data->iset = pdata->iset; + } + } + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = MAX_BRIGHTNESS; + bl = devm_backlight_device_register(&pdev->dev, name, &pdev->dev, data, + &pm860x_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + bl->props.brightness = MAX_BRIGHTNESS; + + platform_set_drvdata(pdev, bl); + + /* read current backlight */ + ret = pm860x_backlight_get_brightness(bl); + if (ret < 0) + return ret; + + backlight_update_status(bl); + return 0; +} + +static struct platform_driver pm860x_backlight_driver = { + .driver = { + .name = "88pm860x-backlight", + .owner = THIS_MODULE, + }, + .probe = pm860x_backlight_probe, +}; + +module_platform_driver(pm860x_backlight_driver); + +MODULE_DESCRIPTION("Backlight Driver for Marvell Semiconductor 88PM8606"); +MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:88pm860x-backlight"); diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 452b770d8cc..5d449059a55 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -8,12 +8,13 @@ menuconfig BACKLIGHT_LCD_SUPPORT Enable this to be able to choose the drivers for controlling the backlight and the LCD panel on some platforms, for example on PDAs. +if BACKLIGHT_LCD_SUPPORT + # # LCD # config LCD_CLASS_DEVICE tristate "Lowlevel LCD controls" - depends on BACKLIGHT_LCD_SUPPORT default m help This framework adds support for low-level control of LCD. @@ -24,10 +25,32 @@ config LCD_CLASS_DEVICE To have support for your specific LCD panel you will have to select the proper drivers which depend on this option. +if LCD_CLASS_DEVICE + +config LCD_CORGI + tristate "LCD Panel support for SHARP corgi/spitz model" + depends on SPI_MASTER && PXA_SHARPSL && BACKLIGHT_CLASS_DEVICE + help + Say y here to support the LCD panels usually found on SHARP + corgi (C7x0) and spitz (Cxx00) models. + +config LCD_L4F00242T03 + tristate "Epson L4F00242T03 LCD" + depends on SPI_MASTER && GPIOLIB + help + SPI driver for Epson L4F00242T03. This provides basic support + for init and powering the LCD up/down through a sysfs interface. + +config LCD_LMS283GF05 + tristate "Samsung LMS283GF05 LCD" + depends on SPI_MASTER && GPIOLIB + help + SPI driver for Samsung LMS283GF05. This provides basic support + for powering the LCD up/down through a sysfs interface. + config LCD_LTV350QV tristate "Samsung LTV350QV LCD Panel" - depends on LCD_CLASS_DEVICE && SPI_MASTER - default n + depends on SPI_MASTER help If you have a Samsung LTV350QV LCD panel, say y to include a power control driver for it. The panel starts up in power @@ -36,36 +59,102 @@ config LCD_LTV350QV The LTV350QV panel is present on all ATSTK1000 boards. +config LCD_ILI922X + tristate "ILI Technology ILI9221/ILI9222 support" + depends on SPI + help + If you have a panel based on the ILI9221/9222 controller + chip then say y to include a driver for it. + config LCD_ILI9320 - tristate - depends on LCD_CLASS_DEVICE && BACKLIGHT_LCD_SUPPORT - default n + tristate "ILI Technology ILI9320 controller support" + depends on SPI help If you have a panel based on the ILI9320 controller chip then say y to include a power driver for it. +config LCD_TDO24M + tristate "Toppoly TDO24M and TDO35S LCD Panels support" + depends on SPI_MASTER + help + If you have a Toppoly TDO24M/TDO35S series LCD panel, say y here to + include the support for it. + config LCD_VGG2432A4 tristate "VGG2432A4 LCM device support" - depends on BACKLIGHT_LCD_SUPPORT && LCD_CLASS_DEVICE && SPI_MASTER + depends on SPI_MASTER select LCD_ILI9320 - default n help If you have a VGG2432A4 panel based on the ILI9320 controller chip then say y to include a power driver for it. config LCD_PLATFORM tristate "Platform LCD controls" - depends on LCD_CLASS_DEVICE help This driver provides a platform-device registered LCD power control interface. +config LCD_TOSA + tristate "Sharp SL-6000 LCD Driver" + depends on I2C && SPI && MACH_TOSA + help + If you have an Sharp SL-6000 Zaurus say Y to enable a driver + for its LCD. + +config LCD_HP700 + tristate "HP Jornada 700 series LCD Driver" + depends on SA1100_JORNADA720_SSP && !PREEMPT + default y + help + If you have an HP Jornada 700 series handheld (710/720/728) + say Y to enable LCD control driver. + +config LCD_S6E63M0 + tristate "S6E63M0 AMOLED LCD Driver" + depends on SPI && BACKLIGHT_CLASS_DEVICE + default n + help + If you have an S6E63M0 LCD Panel, say Y to enable its + LCD control driver. + +config LCD_LD9040 + tristate "LD9040 AMOLED LCD Driver" + depends on SPI && BACKLIGHT_CLASS_DEVICE + default n + help + If you have an LD9040 Panel, say Y to enable its + control driver. + +config LCD_AMS369FG06 + tristate "AMS369FG06 AMOLED LCD Driver" + depends on SPI && BACKLIGHT_CLASS_DEVICE + default n + help + If you have an AMS369FG06 AMOLED Panel, say Y to enable its + LCD control driver. + +config LCD_LMS501KF03 + tristate "LMS501KF03 LCD Driver" + depends on SPI + default n + help + If you have an LMS501KF03 LCD Panel, say Y to enable its + LCD control driver. + +config LCD_HX8357 + tristate "Himax HX-8357 LCD Driver" + depends on SPI + help + If you have a HX-8357 LCD panel, say Y to enable its LCD control + driver. + +endif # LCD_CLASS_DEVICE + # # Backlight # config BACKLIGHT_CLASS_DEVICE tristate "Lowlevel Backlight controls" - depends on BACKLIGHT_LCD_SUPPORT default m help This framework adds support for low-level control of the LCD @@ -74,10 +163,12 @@ config BACKLIGHT_CLASS_DEVICE To have support for your specific LCD panel you will have to select the proper drivers which depend on this option. +if BACKLIGHT_CLASS_DEVICE + config BACKLIGHT_ATMEL_LCDC bool "Atmel LCDC Contrast-as-Backlight control" - depends on BACKLIGHT_CLASS_DEVICE && FB_ATMEL - default y if MACH_SAM9261EK || MACH_SAM9263EK + depends on FB_ATMEL + default y if MACH_AT91SAM9261EK || MACH_AT91SAM9G10EK || MACH_AT91SAM9263EK help This provides a backlight control internal to the Atmel LCDC driver. If the LCD "contrast control" on your board is wired @@ -89,8 +180,7 @@ config BACKLIGHT_ATMEL_LCDC config BACKLIGHT_ATMEL_PWM tristate "Atmel PWM backlight control" - depends on BACKLIGHT_CLASS_DEVICE && ATMEL_PWM - default n + depends on ATMEL_PWM help Say Y here if you want to use the PWM peripheral in Atmel AT91 and AVR32 devices. This driver will need additional platform data to know @@ -99,18 +189,39 @@ config BACKLIGHT_ATMEL_PWM To compile this driver as a module, choose M here: the module will be called atmel-pwm-bl. -config BACKLIGHT_CORGI +config BACKLIGHT_EP93XX + tristate "Cirrus EP93xx Backlight Driver" + depends on FB_EP93XX + help + If you have a LCD backlight connected to the BRIGHT output of + the EP93xx, say Y here to enable this driver. + + To compile this driver as a module, choose M here: the module will + be called ep93xx_bl. + +config BACKLIGHT_GENERIC tristate "Generic (aka Sharp Corgi) Backlight Driver" - depends on BACKLIGHT_CLASS_DEVICE - default n + default y help Say y to enable the generic platform backlight driver previously known as the Corgi backlight driver. If you have a Sharp Zaurus - SL-C7xx, SL-Cxx00 or SL-6000x say y. Most users can say n. + SL-C7xx, SL-Cxx00 or SL-6000x say y. + +config BACKLIGHT_LM3533 + tristate "Backlight Driver for LM3533" + depends on BACKLIGHT_CLASS_DEVICE + depends on MFD_LM3533 + help + Say Y to enable the backlight driver for National Semiconductor / TI + LM3533 Lighting Power chips. + + The backlights can be controlled directly, through PWM input, or by + the ambient-light-sensor interface. The chip supports 256 brightness + levels. config BACKLIGHT_LOCOMO tristate "Sharp LOCOMO LCD/Backlight Driver" - depends on BACKLIGHT_CLASS_DEVICE && SHARP_LOCOMO + depends on SHARP_LOCOMO default y help If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to @@ -118,7 +229,7 @@ config BACKLIGHT_LOCOMO config BACKLIGHT_OMAP1 tristate "OMAP1 PWL-based LCD Backlight" - depends on BACKLIGHT_CLASS_DEVICE && ARCH_OMAP1 + depends on ARCH_OMAP1 default y help This driver controls the LCD backlight level and power for @@ -127,40 +238,212 @@ config BACKLIGHT_OMAP1 config BACKLIGHT_HP680 tristate "HP Jornada 680 Backlight Driver" - depends on BACKLIGHT_CLASS_DEVICE && SH_HP6XX + depends on SH_HP6XX default y help If you have a HP Jornada 680, say y to enable the backlight driver. -config BACKLIGHT_PROGEAR - tristate "Frontpath ProGear Backlight Driver" - depends on BACKLIGHT_CLASS_DEVICE && PCI && X86 - default n +config BACKLIGHT_HP700 + tristate "HP Jornada 700 series Backlight Driver" + depends on SA1100_JORNADA720_SSP && !PREEMPT + default y help - If you have a Frontpath ProGear say Y to enable the - backlight driver. + If you have an HP Jornada 700 series, + say Y to include backlight control driver. config BACKLIGHT_CARILLO_RANCH tristate "Intel Carillo Ranch Backlight Driver" - depends on BACKLIGHT_CLASS_DEVICE && LCD_CLASS_DEVICE && PCI && X86 && FB_LE80578 - default n + depends on LCD_CLASS_DEVICE && PCI && X86 && FB_LE80578 help If you have a Intel LE80578 (Carillo Ranch) say Y to enable the backlight driver. config BACKLIGHT_PWM tristate "Generic PWM based Backlight Driver" - depends on BACKLIGHT_CLASS_DEVICE && HAVE_PWM + depends on PWM help If you have a LCD backlight adjustable by PWM, say Y to enable this driver. -config BACKLIGHT_MBP_NVIDIA - tristate "MacBook Pro Nvidia Backlight Driver" - depends on BACKLIGHT_CLASS_DEVICE && X86 - default n +config BACKLIGHT_DA903X + tristate "Backlight Driver for DA9030/DA9034 using WLED" + depends on PMIC_DA903X + help + If you have a LCD backlight connected to the WLED output of DA9030 + or DA9034 WLED output, say Y here to enable this driver. + +config BACKLIGHT_DA9052 + tristate "Dialog DA9052/DA9053 WLED" + depends on PMIC_DA9052 + help + Enable the Backlight Driver for DA9052-BC and DA9053-AA/Bx PMICs. + +config BACKLIGHT_MAX8925 + tristate "Backlight driver for MAX8925" + depends on MFD_MAX8925 + help + If you have a LCD backlight connected to the WLED output of MAX8925 + WLED output, say Y here to enable this driver. + +config BACKLIGHT_APPLE + tristate "Apple Backlight Driver" + depends on X86 && ACPI help - If you have an Apple Macbook Pro with Nvidia graphics hardware say Y - to enable a driver for its backlight + If you have an Intel-based Apple say Y to enable a driver for its + backlight. + +config BACKLIGHT_TOSA + tristate "Sharp SL-6000 Backlight Driver" + depends on I2C && MACH_TOSA && LCD_TOSA + help + If you have an Sharp SL-6000 Zaurus say Y to enable a driver + for its backlight + +config BACKLIGHT_SAHARA + tristate "Tabletkiosk Sahara Touch-iT Backlight Driver" + depends on X86 + help + If you have a Tabletkiosk Sahara Touch-iT, say y to enable the + backlight driver. + +config BACKLIGHT_WM831X + tristate "WM831x PMIC Backlight Driver" + depends on MFD_WM831X + help + If you have a backlight driven by the ISINK and DCDC of a + WM831x PMIC say y to enable the backlight driver for it. + +config BACKLIGHT_ADP5520 + tristate "Backlight Driver for ADP5520/ADP5501 using WLED" + depends on PMIC_ADP5520 + help + If you have a LCD backlight connected to the BST/BL_SNK output of + ADP5520 or ADP5501, say Y here to enable this driver. + + To compile this driver as a module, choose M here: the module will + be called adp5520_bl. + +config BACKLIGHT_ADP8860 + tristate "Backlight Driver for ADP8860/ADP8861/ADP8863 using WLED" + depends on BACKLIGHT_CLASS_DEVICE && I2C + select NEW_LEDS + select LEDS_CLASS + help + If you have a LCD backlight connected to the ADP8860, ADP8861 or + ADP8863 say Y here to enable this driver. + + To compile this driver as a module, choose M here: the module will + be called adp8860_bl. + +config BACKLIGHT_ADP8870 + tristate "Backlight Driver for ADP8870 using WLED" + depends on BACKLIGHT_CLASS_DEVICE && I2C + select NEW_LEDS + select LEDS_CLASS + help + If you have a LCD backlight connected to the ADP8870, + say Y here to enable this driver. + + To compile this driver as a module, choose M here: the module will + be called adp8870_bl. + +config BACKLIGHT_88PM860X + tristate "Backlight Driver for 88PM8606 using WLED" + depends on MFD_88PM860X + help + Say Y to enable the backlight driver for Marvell 88PM8606. + +config BACKLIGHT_PCF50633 + tristate "Backlight driver for NXP PCF50633 MFD" + depends on BACKLIGHT_CLASS_DEVICE && MFD_PCF50633 + help + If you have a backlight driven by a NXP PCF50633 MFD, say Y here to + enable its driver. + +config BACKLIGHT_AAT2870 + tristate "AnalogicTech AAT2870 Backlight" + depends on BACKLIGHT_CLASS_DEVICE && MFD_AAT2870_CORE + help + If you have a AnalogicTech AAT2870 say Y to enable the + backlight driver. + +config BACKLIGHT_LM3630A + tristate "Backlight Driver for LM3630A" + depends on BACKLIGHT_CLASS_DEVICE && I2C && PWM + select REGMAP_I2C + help + This supports TI LM3630A Backlight Driver + +config BACKLIGHT_LM3639 + tristate "Backlight Driver for LM3639" + depends on BACKLIGHT_CLASS_DEVICE && I2C + select REGMAP_I2C + select NEW_LEDS + select LEDS_CLASS + help + This supports TI LM3639 Backlight + 1.5A Flash LED Driver + +config BACKLIGHT_LP855X + tristate "Backlight driver for TI LP855X" + depends on BACKLIGHT_CLASS_DEVICE && I2C && PWM + help + This supports TI LP8550, LP8551, LP8552, LP8553, LP8555, LP8556 and + LP8557 backlight driver. + +config BACKLIGHT_LP8788 + tristate "Backlight driver for TI LP8788 MFD" + depends on BACKLIGHT_CLASS_DEVICE && MFD_LP8788 && PWM + help + This supports TI LP8788 backlight driver. + +config BACKLIGHT_OT200 + tristate "Backlight driver for ot200 visualisation device" + depends on BACKLIGHT_CLASS_DEVICE && CS5535_MFGPT && GPIO_CS5535 + help + To compile this driver as a module, choose M here: the module will be + called ot200_bl. + +config BACKLIGHT_PANDORA + tristate "Backlight driver for Pandora console" + depends on TWL4030_CORE + help + If you have a Pandora console, say Y to enable the + backlight driver. + +config BACKLIGHT_TPS65217 + tristate "TPS65217 Backlight" + depends on BACKLIGHT_CLASS_DEVICE && MFD_TPS65217 + help + If you have a Texas Instruments TPS65217 say Y to enable the + backlight driver. + +config BACKLIGHT_AS3711 + tristate "AS3711 Backlight" + depends on BACKLIGHT_CLASS_DEVICE && MFD_AS3711 + help + If you have an Austrian Microsystems AS3711 say Y to enable the + backlight driver. + +config BACKLIGHT_GPIO + tristate "Generic GPIO based Backlight Driver" + depends on GPIOLIB + help + If you have a LCD backlight adjustable by GPIO, say Y to enable + this driver. + +config BACKLIGHT_LV5207LP + tristate "Sanyo LV5207LP Backlight" + depends on I2C + help + If you have a Sanyo LV5207LP say Y to enable the backlight driver. + +config BACKLIGHT_BD6107 + tristate "Rohm BD6107 Backlight" + depends on I2C + help + If you have a Rohm BD6107 say Y to enable the backlight driver. + +endif # BACKLIGHT_CLASS_DEVICE +endif # BACKLIGHT_LCD_SUPPORT diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index b405aace803..bb820024f34 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -1,19 +1,55 @@ # Backlight & LCD drivers -obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o -obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o -obj-$(CONFIG_LCD_ILI9320) += ili9320.o -obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o -obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o - -obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o -obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o -obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o -obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o -obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o -obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o -obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o -obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o -obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o -obj-$(CONFIG_BACKLIGHT_MBP_NVIDIA) += mbp_nvidia_bl.o +obj-$(CONFIG_LCD_AMS369FG06) += ams369fg06.o +obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o +obj-$(CONFIG_LCD_CORGI) += corgi_lcd.o +obj-$(CONFIG_LCD_HP700) += jornada720_lcd.o +obj-$(CONFIG_LCD_HX8357) += hx8357.o +obj-$(CONFIG_LCD_ILI922X) += ili922x.o +obj-$(CONFIG_LCD_ILI9320) += ili9320.o +obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o +obj-$(CONFIG_LCD_LD9040) += ld9040.o +obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o +obj-$(CONFIG_LCD_LMS501KF03) += lms501kf03.o +obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o +obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o +obj-$(CONFIG_LCD_S6E63M0) += s6e63m0.o +obj-$(CONFIG_LCD_TDO24M) += tdo24m.o +obj-$(CONFIG_LCD_TOSA) += tosa_lcd.o +obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o +obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o +obj-$(CONFIG_BACKLIGHT_AAT2870) += aat2870_bl.o +obj-$(CONFIG_BACKLIGHT_ADP5520) += adp5520_bl.o +obj-$(CONFIG_BACKLIGHT_ADP8860) += adp8860_bl.o +obj-$(CONFIG_BACKLIGHT_ADP8870) += adp8870_bl.o +obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o +obj-$(CONFIG_BACKLIGHT_AS3711) += as3711_bl.o +obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o +obj-$(CONFIG_BACKLIGHT_BD6107) += bd6107.o +obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o +obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o +obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o +obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o +obj-$(CONFIG_BACKLIGHT_EP93XX) += ep93xx_bl.o +obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o +obj-$(CONFIG_BACKLIGHT_GPIO) += gpio_backlight.o +obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o +obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o +obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o +obj-$(CONFIG_BACKLIGHT_LM3630A) += lm3630a_bl.o +obj-$(CONFIG_BACKLIGHT_LM3639) += lm3639_bl.o +obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o +obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o +obj-$(CONFIG_BACKLIGHT_LP8788) += lp8788_bl.o +obj-$(CONFIG_BACKLIGHT_LV5207LP) += lv5207lp.o +obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o +obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o +obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o +obj-$(CONFIG_BACKLIGHT_PANDORA) += pandora_bl.o +obj-$(CONFIG_BACKLIGHT_PCF50633) += pcf50633-backlight.o +obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o +obj-$(CONFIG_BACKLIGHT_SAHARA) += kb3886_bl.o +obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o +obj-$(CONFIG_BACKLIGHT_TPS65217) += tps65217_bl.o +obj-$(CONFIG_BACKLIGHT_WM831X) += wm831x_bl.o diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c new file mode 100644 index 00000000000..ec5350f2c28 --- /dev/null +++ b/drivers/video/backlight/aat2870_bl.c @@ -0,0 +1,240 @@ +/* + * linux/drivers/video/backlight/aat2870_bl.c + * + * Copyright (c) 2011, NVIDIA Corporation. + * Author: Jin Park <jinyoungp@nvidia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/mutex.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/mfd/aat2870.h> + +struct aat2870_bl_driver_data { + struct platform_device *pdev; + struct backlight_device *bd; + + int channels; + int max_current; + int brightness; /* current brightness */ +}; + +static inline int aat2870_brightness(struct aat2870_bl_driver_data *aat2870_bl, + int brightness) +{ + struct backlight_device *bd = aat2870_bl->bd; + int val; + + val = brightness * (aat2870_bl->max_current - 1); + val /= bd->props.max_brightness; + + return val; +} + +static inline int aat2870_bl_enable(struct aat2870_bl_driver_data *aat2870_bl) +{ + struct aat2870_data *aat2870 + = dev_get_drvdata(aat2870_bl->pdev->dev.parent); + + return aat2870->write(aat2870, AAT2870_BL_CH_EN, + (u8)aat2870_bl->channels); +} + +static inline int aat2870_bl_disable(struct aat2870_bl_driver_data *aat2870_bl) +{ + struct aat2870_data *aat2870 + = dev_get_drvdata(aat2870_bl->pdev->dev.parent); + + return aat2870->write(aat2870, AAT2870_BL_CH_EN, 0x0); +} + +static int aat2870_bl_get_brightness(struct backlight_device *bd) +{ + return bd->props.brightness; +} + +static int aat2870_bl_update_status(struct backlight_device *bd) +{ + struct aat2870_bl_driver_data *aat2870_bl = bl_get_data(bd); + struct aat2870_data *aat2870 = + dev_get_drvdata(aat2870_bl->pdev->dev.parent); + int brightness = bd->props.brightness; + int ret; + + if ((brightness < 0) || (bd->props.max_brightness < brightness)) { + dev_err(&bd->dev, "invalid brightness, %d\n", brightness); + return -EINVAL; + } + + dev_dbg(&bd->dev, "brightness=%d, power=%d, state=%d\n", + bd->props.brightness, bd->props.power, bd->props.state); + + if ((bd->props.power != FB_BLANK_UNBLANK) || + (bd->props.state & BL_CORE_FBBLANK) || + (bd->props.state & BL_CORE_SUSPENDED)) + brightness = 0; + + ret = aat2870->write(aat2870, AAT2870_BLM, + (u8)aat2870_brightness(aat2870_bl, brightness)); + if (ret < 0) + return ret; + + if (brightness == 0) { + ret = aat2870_bl_disable(aat2870_bl); + if (ret < 0) + return ret; + } else if (aat2870_bl->brightness == 0) { + ret = aat2870_bl_enable(aat2870_bl); + if (ret < 0) + return ret; + } + + aat2870_bl->brightness = brightness; + + return 0; +} + +static int aat2870_bl_check_fb(struct backlight_device *bd, struct fb_info *fi) +{ + return 1; +} + +static const struct backlight_ops aat2870_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .get_brightness = aat2870_bl_get_brightness, + .update_status = aat2870_bl_update_status, + .check_fb = aat2870_bl_check_fb, +}; + +static int aat2870_bl_probe(struct platform_device *pdev) +{ + struct aat2870_bl_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct aat2870_bl_driver_data *aat2870_bl; + struct backlight_device *bd; + struct backlight_properties props; + int ret = 0; + + if (!pdata) { + dev_err(&pdev->dev, "No platform data\n"); + ret = -ENXIO; + goto out; + } + + if (pdev->id != AAT2870_ID_BL) { + dev_err(&pdev->dev, "Invalid device ID, %d\n", pdev->id); + ret = -EINVAL; + goto out; + } + + aat2870_bl = devm_kzalloc(&pdev->dev, + sizeof(struct aat2870_bl_driver_data), + GFP_KERNEL); + if (!aat2870_bl) { + ret = -ENOMEM; + goto out; + } + + memset(&props, 0, sizeof(struct backlight_properties)); + + props.type = BACKLIGHT_RAW; + bd = devm_backlight_device_register(&pdev->dev, "aat2870-backlight", + &pdev->dev, aat2870_bl, &aat2870_bl_ops, + &props); + if (IS_ERR(bd)) { + dev_err(&pdev->dev, + "Failed allocate memory for backlight device\n"); + ret = PTR_ERR(bd); + goto out; + } + + aat2870_bl->pdev = pdev; + platform_set_drvdata(pdev, aat2870_bl); + + aat2870_bl->bd = bd; + + if (pdata->channels > 0) + aat2870_bl->channels = pdata->channels; + else + aat2870_bl->channels = AAT2870_BL_CH_ALL; + + if (pdata->max_current > 0) + aat2870_bl->max_current = pdata->max_current; + else + aat2870_bl->max_current = AAT2870_CURRENT_27_9; + + if (pdata->max_brightness > 0) + bd->props.max_brightness = pdata->max_brightness; + else + bd->props.max_brightness = 255; + + aat2870_bl->brightness = 0; + bd->props.power = FB_BLANK_UNBLANK; + bd->props.brightness = bd->props.max_brightness; + + ret = aat2870_bl_update_status(bd); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to initialize\n"); + return ret; + } + + return 0; + +out: + return ret; +} + +static int aat2870_bl_remove(struct platform_device *pdev) +{ + struct aat2870_bl_driver_data *aat2870_bl = platform_get_drvdata(pdev); + struct backlight_device *bd = aat2870_bl->bd; + + bd->props.power = FB_BLANK_POWERDOWN; + bd->props.brightness = 0; + backlight_update_status(bd); + + return 0; +} + +static struct platform_driver aat2870_bl_driver = { + .driver = { + .name = "aat2870-backlight", + .owner = THIS_MODULE, + }, + .probe = aat2870_bl_probe, + .remove = aat2870_bl_remove, +}; + +static int __init aat2870_bl_init(void) +{ + return platform_driver_register(&aat2870_bl_driver); +} +subsys_initcall(aat2870_bl_init); + +static void __exit aat2870_bl_exit(void) +{ + platform_driver_unregister(&aat2870_bl_driver); +} +module_exit(aat2870_bl_exit); + +MODULE_DESCRIPTION("AnalogicTech AAT2870 Backlight"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jin Park <jinyoungp@nvidia.com>"); diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c new file mode 100644 index 00000000000..f37097a261a --- /dev/null +++ b/drivers/video/backlight/adp5520_bl.c @@ -0,0 +1,389 @@ +/* + * Backlight driver for Analog Devices ADP5520/ADP5501 MFD PMICs + * + * Copyright 2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/mfd/adp5520.h> +#include <linux/slab.h> +#include <linux/module.h> + +struct adp5520_bl { + struct device *master; + struct adp5520_backlight_platform_data *pdata; + struct mutex lock; + unsigned long cached_daylight_max; + int id; + int current_brightness; +}; + +static int adp5520_bl_set(struct backlight_device *bl, int brightness) +{ + struct adp5520_bl *data = bl_get_data(bl); + struct device *master = data->master; + int ret = 0; + + if (data->pdata->en_ambl_sens) { + if ((brightness > 0) && (brightness < ADP5020_MAX_BRIGHTNESS)) { + /* Disable Ambient Light auto adjust */ + ret |= adp5520_clr_bits(master, ADP5520_BL_CONTROL, + ADP5520_BL_AUTO_ADJ); + ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX, + brightness); + } else { + /* + * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust + * restore daylight l3 sysfs brightness + */ + ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX, + data->cached_daylight_max); + ret |= adp5520_set_bits(master, ADP5520_BL_CONTROL, + ADP5520_BL_AUTO_ADJ); + } + } else { + ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX, brightness); + } + + if (data->current_brightness && brightness == 0) + ret |= adp5520_set_bits(master, + ADP5520_MODE_STATUS, ADP5520_DIM_EN); + else if (data->current_brightness == 0 && brightness) + ret |= adp5520_clr_bits(master, + ADP5520_MODE_STATUS, ADP5520_DIM_EN); + + if (!ret) + data->current_brightness = brightness; + + return ret; +} + +static int adp5520_bl_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + return adp5520_bl_set(bl, brightness); +} + +static int adp5520_bl_get_brightness(struct backlight_device *bl) +{ + struct adp5520_bl *data = bl_get_data(bl); + int error; + uint8_t reg_val; + + error = adp5520_read(data->master, ADP5520_BL_VALUE, ®_val); + + return error ? data->current_brightness : reg_val; +} + +static const struct backlight_ops adp5520_bl_ops = { + .update_status = adp5520_bl_update_status, + .get_brightness = adp5520_bl_get_brightness, +}; + +static int adp5520_bl_setup(struct backlight_device *bl) +{ + struct adp5520_bl *data = bl_get_data(bl); + struct device *master = data->master; + struct adp5520_backlight_platform_data *pdata = data->pdata; + int ret = 0; + + ret |= adp5520_write(master, ADP5520_DAYLIGHT_MAX, + pdata->l1_daylight_max); + ret |= adp5520_write(master, ADP5520_DAYLIGHT_DIM, + pdata->l1_daylight_dim); + + if (pdata->en_ambl_sens) { + data->cached_daylight_max = pdata->l1_daylight_max; + ret |= adp5520_write(master, ADP5520_OFFICE_MAX, + pdata->l2_office_max); + ret |= adp5520_write(master, ADP5520_OFFICE_DIM, + pdata->l2_office_dim); + ret |= adp5520_write(master, ADP5520_DARK_MAX, + pdata->l3_dark_max); + ret |= adp5520_write(master, ADP5520_DARK_DIM, + pdata->l3_dark_dim); + ret |= adp5520_write(master, ADP5520_L2_TRIP, + pdata->l2_trip); + ret |= adp5520_write(master, ADP5520_L2_HYS, + pdata->l2_hyst); + ret |= adp5520_write(master, ADP5520_L3_TRIP, + pdata->l3_trip); + ret |= adp5520_write(master, ADP5520_L3_HYS, + pdata->l3_hyst); + ret |= adp5520_write(master, ADP5520_ALS_CMPR_CFG, + ALS_CMPR_CFG_VAL(pdata->abml_filt, + ADP5520_L3_EN)); + } + + ret |= adp5520_write(master, ADP5520_BL_CONTROL, + BL_CTRL_VAL(pdata->fade_led_law, + pdata->en_ambl_sens)); + + ret |= adp5520_write(master, ADP5520_BL_FADE, FADE_VAL(pdata->fade_in, + pdata->fade_out)); + + ret |= adp5520_set_bits(master, ADP5520_MODE_STATUS, + ADP5520_BL_EN | ADP5520_DIM_EN); + + return ret; +} + +static ssize_t adp5520_show(struct device *dev, char *buf, int reg) +{ + struct adp5520_bl *data = dev_get_drvdata(dev); + int ret; + uint8_t reg_val; + + mutex_lock(&data->lock); + ret = adp5520_read(data->master, reg, ®_val); + mutex_unlock(&data->lock); + + if (ret < 0) + return ret; + + return sprintf(buf, "%u\n", reg_val); +} + +static ssize_t adp5520_store(struct device *dev, const char *buf, + size_t count, int reg) +{ + struct adp5520_bl *data = dev_get_drvdata(dev); + unsigned long val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&data->lock); + adp5520_write(data->master, reg, val); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t adp5520_bl_dark_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp5520_show(dev, buf, ADP5520_DARK_MAX); +} + +static ssize_t adp5520_bl_dark_max_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp5520_store(dev, buf, count, ADP5520_DARK_MAX); +} +static DEVICE_ATTR(dark_max, 0664, adp5520_bl_dark_max_show, + adp5520_bl_dark_max_store); + +static ssize_t adp5520_bl_office_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp5520_show(dev, buf, ADP5520_OFFICE_MAX); +} + +static ssize_t adp5520_bl_office_max_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp5520_store(dev, buf, count, ADP5520_OFFICE_MAX); +} +static DEVICE_ATTR(office_max, 0664, adp5520_bl_office_max_show, + adp5520_bl_office_max_store); + +static ssize_t adp5520_bl_daylight_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp5520_show(dev, buf, ADP5520_DAYLIGHT_MAX); +} + +static ssize_t adp5520_bl_daylight_max_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adp5520_bl *data = dev_get_drvdata(dev); + int ret; + + ret = kstrtoul(buf, 10, &data->cached_daylight_max); + if (ret < 0) + return ret; + + return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_MAX); +} +static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show, + adp5520_bl_daylight_max_store); + +static ssize_t adp5520_bl_dark_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp5520_show(dev, buf, ADP5520_DARK_DIM); +} + +static ssize_t adp5520_bl_dark_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp5520_store(dev, buf, count, ADP5520_DARK_DIM); +} +static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show, + adp5520_bl_dark_dim_store); + +static ssize_t adp5520_bl_office_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp5520_show(dev, buf, ADP5520_OFFICE_DIM); +} + +static ssize_t adp5520_bl_office_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp5520_store(dev, buf, count, ADP5520_OFFICE_DIM); +} +static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show, + adp5520_bl_office_dim_store); + +static ssize_t adp5520_bl_daylight_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp5520_show(dev, buf, ADP5520_DAYLIGHT_DIM); +} + +static ssize_t adp5520_bl_daylight_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp5520_store(dev, buf, count, ADP5520_DAYLIGHT_DIM); +} +static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show, + adp5520_bl_daylight_dim_store); + +static struct attribute *adp5520_bl_attributes[] = { + &dev_attr_dark_max.attr, + &dev_attr_dark_dim.attr, + &dev_attr_office_max.attr, + &dev_attr_office_dim.attr, + &dev_attr_daylight_max.attr, + &dev_attr_daylight_dim.attr, + NULL +}; + +static const struct attribute_group adp5520_bl_attr_group = { + .attrs = adp5520_bl_attributes, +}; + +static int adp5520_bl_probe(struct platform_device *pdev) +{ + struct backlight_properties props; + struct backlight_device *bl; + struct adp5520_bl *data; + int ret = 0; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + data->master = pdev->dev.parent; + data->pdata = dev_get_platdata(&pdev->dev); + + if (data->pdata == NULL) { + dev_err(&pdev->dev, "missing platform data\n"); + return -ENODEV; + } + + data->id = pdev->id; + data->current_brightness = 0; + + mutex_init(&data->lock); + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = ADP5020_MAX_BRIGHTNESS; + bl = devm_backlight_device_register(&pdev->dev, pdev->name, + data->master, data, &adp5520_bl_ops, + &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.brightness = ADP5020_MAX_BRIGHTNESS; + if (data->pdata->en_ambl_sens) + ret = sysfs_create_group(&bl->dev.kobj, + &adp5520_bl_attr_group); + + if (ret) { + dev_err(&pdev->dev, "failed to register sysfs\n"); + return ret; + } + + platform_set_drvdata(pdev, bl); + ret |= adp5520_bl_setup(bl); + backlight_update_status(bl); + + return ret; +} + +static int adp5520_bl_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct adp5520_bl *data = bl_get_data(bl); + + adp5520_clr_bits(data->master, ADP5520_MODE_STATUS, ADP5520_BL_EN); + + if (data->pdata->en_ambl_sens) + sysfs_remove_group(&bl->dev.kobj, + &adp5520_bl_attr_group); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int adp5520_bl_suspend(struct device *dev) +{ + struct backlight_device *bl = dev_get_drvdata(dev); + + return adp5520_bl_set(bl, 0); +} + +static int adp5520_bl_resume(struct device *dev) +{ + struct backlight_device *bl = dev_get_drvdata(dev); + + backlight_update_status(bl); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(adp5520_bl_pm_ops, adp5520_bl_suspend, + adp5520_bl_resume); + +static struct platform_driver adp5520_bl_driver = { + .driver = { + .name = "adp5520-backlight", + .owner = THIS_MODULE, + .pm = &adp5520_bl_pm_ops, + }, + .probe = adp5520_bl_probe, + .remove = adp5520_bl_remove, +}; + +module_platform_driver(adp5520_bl_driver); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("ADP5520(01) Backlight Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:adp5520-backlight"); diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c new file mode 100644 index 00000000000..be8d83deca7 --- /dev/null +++ b/drivers/video/backlight/adp8860_bl.c @@ -0,0 +1,819 @@ +/* + * Backlight driver for Analog Devices ADP8860 Backlight Devices + * + * Copyright 2009-2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/pm.h> +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/leds.h> +#include <linux/slab.h> +#include <linux/workqueue.h> + +#include <linux/i2c/adp8860.h> +#define ADP8860_EXT_FEATURES +#define ADP8860_USE_LEDS + +#define ADP8860_MFDVID 0x00 /* Manufacturer and device ID */ +#define ADP8860_MDCR 0x01 /* Device mode and status */ +#define ADP8860_MDCR2 0x02 /* Device mode and Status Register 2 */ +#define ADP8860_INTR_EN 0x03 /* Interrupts enable */ +#define ADP8860_CFGR 0x04 /* Configuration register */ +#define ADP8860_BLSEN 0x05 /* Sink enable backlight or independent */ +#define ADP8860_BLOFF 0x06 /* Backlight off timeout */ +#define ADP8860_BLDIM 0x07 /* Backlight dim timeout */ +#define ADP8860_BLFR 0x08 /* Backlight fade in and out rates */ +#define ADP8860_BLMX1 0x09 /* Backlight (Brightness Level 1-daylight) maximum current */ +#define ADP8860_BLDM1 0x0A /* Backlight (Brightness Level 1-daylight) dim current */ +#define ADP8860_BLMX2 0x0B /* Backlight (Brightness Level 2-office) maximum current */ +#define ADP8860_BLDM2 0x0C /* Backlight (Brightness Level 2-office) dim current */ +#define ADP8860_BLMX3 0x0D /* Backlight (Brightness Level 3-dark) maximum current */ +#define ADP8860_BLDM3 0x0E /* Backlight (Brightness Level 3-dark) dim current */ +#define ADP8860_ISCFR 0x0F /* Independent sink current fade control register */ +#define ADP8860_ISCC 0x10 /* Independent sink current control register */ +#define ADP8860_ISCT1 0x11 /* Independent Sink Current Timer Register LED[7:5] */ +#define ADP8860_ISCT2 0x12 /* Independent Sink Current Timer Register LED[4:1] */ +#define ADP8860_ISCF 0x13 /* Independent sink current fade register */ +#define ADP8860_ISC7 0x14 /* Independent Sink Current LED7 */ +#define ADP8860_ISC6 0x15 /* Independent Sink Current LED6 */ +#define ADP8860_ISC5 0x16 /* Independent Sink Current LED5 */ +#define ADP8860_ISC4 0x17 /* Independent Sink Current LED4 */ +#define ADP8860_ISC3 0x18 /* Independent Sink Current LED3 */ +#define ADP8860_ISC2 0x19 /* Independent Sink Current LED2 */ +#define ADP8860_ISC1 0x1A /* Independent Sink Current LED1 */ +#define ADP8860_CCFG 0x1B /* Comparator configuration */ +#define ADP8860_CCFG2 0x1C /* Second comparator configuration */ +#define ADP8860_L2_TRP 0x1D /* L2 comparator reference */ +#define ADP8860_L2_HYS 0x1E /* L2 hysteresis */ +#define ADP8860_L3_TRP 0x1F /* L3 comparator reference */ +#define ADP8860_L3_HYS 0x20 /* L3 hysteresis */ +#define ADP8860_PH1LEVL 0x21 /* First phototransistor ambient light level-low byte register */ +#define ADP8860_PH1LEVH 0x22 /* First phototransistor ambient light level-high byte register */ +#define ADP8860_PH2LEVL 0x23 /* Second phototransistor ambient light level-low byte register */ +#define ADP8860_PH2LEVH 0x24 /* Second phototransistor ambient light level-high byte register */ + +#define ADP8860_MANUFID 0x0 /* Analog Devices ADP8860 Manufacturer ID */ +#define ADP8861_MANUFID 0x4 /* Analog Devices ADP8861 Manufacturer ID */ +#define ADP8863_MANUFID 0x2 /* Analog Devices ADP8863 Manufacturer ID */ + +#define ADP8860_DEVID(x) ((x) & 0xF) +#define ADP8860_MANID(x) ((x) >> 4) + +/* MDCR Device mode and status */ +#define INT_CFG (1 << 6) +#define NSTBY (1 << 5) +#define DIM_EN (1 << 4) +#define GDWN_DIS (1 << 3) +#define SIS_EN (1 << 2) +#define CMP_AUTOEN (1 << 1) +#define BLEN (1 << 0) + +/* ADP8860_CCFG Main ALS comparator level enable */ +#define L3_EN (1 << 1) +#define L2_EN (1 << 0) + +#define CFGR_BLV_SHIFT 3 +#define CFGR_BLV_MASK 0x3 +#define ADP8860_FLAG_LED_MASK 0xFF + +#define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) +#define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) +#define ALS_CCFG_VAL(filt) ((0x7 & filt) << 5) + +enum { + adp8860, + adp8861, + adp8863 +}; + +struct adp8860_led { + struct led_classdev cdev; + struct work_struct work; + struct i2c_client *client; + enum led_brightness new_brightness; + int id; + int flags; +}; + +struct adp8860_bl { + struct i2c_client *client; + struct backlight_device *bl; + struct adp8860_led *led; + struct adp8860_backlight_platform_data *pdata; + struct mutex lock; + unsigned long cached_daylight_max; + int id; + int revid; + int current_brightness; + unsigned en_ambl_sens:1; + unsigned gdwn_dis:1; +}; + +static int adp8860_read(struct i2c_client *client, int reg, uint8_t *val) +{ + int ret; + + ret = i2c_smbus_read_byte_data(client, reg); + if (ret < 0) { + dev_err(&client->dev, "failed reading at 0x%02x\n", reg); + return ret; + } + + *val = (uint8_t)ret; + return 0; +} + +static int adp8860_write(struct i2c_client *client, u8 reg, u8 val) +{ + return i2c_smbus_write_byte_data(client, reg, val); +} + +static int adp8860_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) +{ + struct adp8860_bl *data = i2c_get_clientdata(client); + uint8_t reg_val; + int ret; + + mutex_lock(&data->lock); + + ret = adp8860_read(client, reg, ®_val); + + if (!ret && ((reg_val & bit_mask) != bit_mask)) { + reg_val |= bit_mask; + ret = adp8860_write(client, reg, reg_val); + } + + mutex_unlock(&data->lock); + return ret; +} + +static int adp8860_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) +{ + struct adp8860_bl *data = i2c_get_clientdata(client); + uint8_t reg_val; + int ret; + + mutex_lock(&data->lock); + + ret = adp8860_read(client, reg, ®_val); + + if (!ret && (reg_val & bit_mask)) { + reg_val &= ~bit_mask; + ret = adp8860_write(client, reg, reg_val); + } + + mutex_unlock(&data->lock); + return ret; +} + +/* + * Independent sink / LED + */ +#if defined(ADP8860_USE_LEDS) +static void adp8860_led_work(struct work_struct *work) +{ + struct adp8860_led *led = container_of(work, struct adp8860_led, work); + adp8860_write(led->client, ADP8860_ISC1 - led->id + 1, + led->new_brightness >> 1); +} + +static void adp8860_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct adp8860_led *led; + + led = container_of(led_cdev, struct adp8860_led, cdev); + led->new_brightness = value; + schedule_work(&led->work); +} + +static int adp8860_led_setup(struct adp8860_led *led) +{ + struct i2c_client *client = led->client; + int ret = 0; + + ret = adp8860_write(client, ADP8860_ISC1 - led->id + 1, 0); + ret |= adp8860_set_bits(client, ADP8860_ISCC, 1 << (led->id - 1)); + + if (led->id > 4) + ret |= adp8860_set_bits(client, ADP8860_ISCT1, + (led->flags & 0x3) << ((led->id - 5) * 2)); + else + ret |= adp8860_set_bits(client, ADP8860_ISCT2, + (led->flags & 0x3) << ((led->id - 1) * 2)); + + return ret; +} + +static int adp8860_led_probe(struct i2c_client *client) +{ + struct adp8860_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + struct adp8860_bl *data = i2c_get_clientdata(client); + struct adp8860_led *led, *led_dat; + struct led_info *cur_led; + int ret, i; + + led = devm_kzalloc(&client->dev, sizeof(*led) * pdata->num_leds, + GFP_KERNEL); + if (led == NULL) + return -ENOMEM; + + ret = adp8860_write(client, ADP8860_ISCFR, pdata->led_fade_law); + ret = adp8860_write(client, ADP8860_ISCT1, + (pdata->led_on_time & 0x3) << 6); + ret |= adp8860_write(client, ADP8860_ISCF, + FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); + + if (ret) { + dev_err(&client->dev, "failed to write\n"); + return ret; + } + + for (i = 0; i < pdata->num_leds; ++i) { + cur_led = &pdata->leds[i]; + led_dat = &led[i]; + + led_dat->id = cur_led->flags & ADP8860_FLAG_LED_MASK; + + if (led_dat->id > 7 || led_dat->id < 1) { + dev_err(&client->dev, "Invalid LED ID %d\n", + led_dat->id); + ret = -EINVAL; + goto err; + } + + if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { + dev_err(&client->dev, "LED %d used by Backlight\n", + led_dat->id); + ret = -EBUSY; + goto err; + } + + led_dat->cdev.name = cur_led->name; + led_dat->cdev.default_trigger = cur_led->default_trigger; + led_dat->cdev.brightness_set = adp8860_led_set; + led_dat->cdev.brightness = LED_OFF; + led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT; + led_dat->client = client; + led_dat->new_brightness = LED_OFF; + INIT_WORK(&led_dat->work, adp8860_led_work); + + ret = led_classdev_register(&client->dev, &led_dat->cdev); + if (ret) { + dev_err(&client->dev, "failed to register LED %d\n", + led_dat->id); + goto err; + } + + ret = adp8860_led_setup(led_dat); + if (ret) { + dev_err(&client->dev, "failed to write\n"); + i++; + goto err; + } + } + + data->led = led; + + return 0; + + err: + for (i = i - 1; i >= 0; --i) { + led_classdev_unregister(&led[i].cdev); + cancel_work_sync(&led[i].work); + } + + return ret; +} + +static int adp8860_led_remove(struct i2c_client *client) +{ + struct adp8860_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + struct adp8860_bl *data = i2c_get_clientdata(client); + int i; + + for (i = 0; i < pdata->num_leds; i++) { + led_classdev_unregister(&data->led[i].cdev); + cancel_work_sync(&data->led[i].work); + } + + return 0; +} +#else +static int adp8860_led_probe(struct i2c_client *client) +{ + return 0; +} + +static int adp8860_led_remove(struct i2c_client *client) +{ + return 0; +} +#endif + +static int adp8860_bl_set(struct backlight_device *bl, int brightness) +{ + struct adp8860_bl *data = bl_get_data(bl); + struct i2c_client *client = data->client; + int ret = 0; + + if (data->en_ambl_sens) { + if ((brightness > 0) && (brightness < ADP8860_MAX_BRIGHTNESS)) { + /* Disable Ambient Light auto adjust */ + ret |= adp8860_clr_bits(client, ADP8860_MDCR, + CMP_AUTOEN); + ret |= adp8860_write(client, ADP8860_BLMX1, brightness); + } else { + /* + * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust + * restore daylight l1 sysfs brightness + */ + ret |= adp8860_write(client, ADP8860_BLMX1, + data->cached_daylight_max); + ret |= adp8860_set_bits(client, ADP8860_MDCR, + CMP_AUTOEN); + } + } else + ret |= adp8860_write(client, ADP8860_BLMX1, brightness); + + if (data->current_brightness && brightness == 0) + ret |= adp8860_set_bits(client, + ADP8860_MDCR, DIM_EN); + else if (data->current_brightness == 0 && brightness) + ret |= adp8860_clr_bits(client, + ADP8860_MDCR, DIM_EN); + + if (!ret) + data->current_brightness = brightness; + + return ret; +} + +static int adp8860_bl_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + return adp8860_bl_set(bl, brightness); +} + +static int adp8860_bl_get_brightness(struct backlight_device *bl) +{ + struct adp8860_bl *data = bl_get_data(bl); + + return data->current_brightness; +} + +static const struct backlight_ops adp8860_bl_ops = { + .update_status = adp8860_bl_update_status, + .get_brightness = adp8860_bl_get_brightness, +}; + +static int adp8860_bl_setup(struct backlight_device *bl) +{ + struct adp8860_bl *data = bl_get_data(bl); + struct i2c_client *client = data->client; + struct adp8860_backlight_platform_data *pdata = data->pdata; + int ret = 0; + + ret |= adp8860_write(client, ADP8860_BLSEN, ~pdata->bl_led_assign); + ret |= adp8860_write(client, ADP8860_BLMX1, pdata->l1_daylight_max); + ret |= adp8860_write(client, ADP8860_BLDM1, pdata->l1_daylight_dim); + + if (data->en_ambl_sens) { + data->cached_daylight_max = pdata->l1_daylight_max; + ret |= adp8860_write(client, ADP8860_BLMX2, + pdata->l2_office_max); + ret |= adp8860_write(client, ADP8860_BLDM2, + pdata->l2_office_dim); + ret |= adp8860_write(client, ADP8860_BLMX3, + pdata->l3_dark_max); + ret |= adp8860_write(client, ADP8860_BLDM3, + pdata->l3_dark_dim); + + ret |= adp8860_write(client, ADP8860_L2_TRP, pdata->l2_trip); + ret |= adp8860_write(client, ADP8860_L2_HYS, pdata->l2_hyst); + ret |= adp8860_write(client, ADP8860_L3_TRP, pdata->l3_trip); + ret |= adp8860_write(client, ADP8860_L3_HYS, pdata->l3_hyst); + ret |= adp8860_write(client, ADP8860_CCFG, L2_EN | L3_EN | + ALS_CCFG_VAL(pdata->abml_filt)); + } + + ret |= adp8860_write(client, ADP8860_CFGR, + BL_CFGR_VAL(pdata->bl_fade_law, 0)); + + ret |= adp8860_write(client, ADP8860_BLFR, FADE_VAL(pdata->bl_fade_in, + pdata->bl_fade_out)); + + ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY | + (data->gdwn_dis ? GDWN_DIS : 0)); + + return ret; +} + +static ssize_t adp8860_show(struct device *dev, char *buf, int reg) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + + mutex_lock(&data->lock); + error = adp8860_read(data->client, reg, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + return sprintf(buf, "%u\n", reg_val); +} + +static ssize_t adp8860_store(struct device *dev, const char *buf, + size_t count, int reg) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + unsigned long val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&data->lock); + adp8860_write(data->client, reg, val); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t adp8860_bl_l3_dark_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLMX3); +} + +static ssize_t adp8860_bl_l3_dark_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLMX3); +} + +static DEVICE_ATTR(l3_dark_max, 0664, adp8860_bl_l3_dark_max_show, + adp8860_bl_l3_dark_max_store); + +static ssize_t adp8860_bl_l2_office_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLMX2); +} + +static ssize_t adp8860_bl_l2_office_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLMX2); +} +static DEVICE_ATTR(l2_office_max, 0664, adp8860_bl_l2_office_max_show, + adp8860_bl_l2_office_max_store); + +static ssize_t adp8860_bl_l1_daylight_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLMX1); +} + +static ssize_t adp8860_bl_l1_daylight_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + int ret = kstrtoul(buf, 10, &data->cached_daylight_max); + if (ret) + return ret; + + return adp8860_store(dev, buf, count, ADP8860_BLMX1); +} +static DEVICE_ATTR(l1_daylight_max, 0664, adp8860_bl_l1_daylight_max_show, + adp8860_bl_l1_daylight_max_store); + +static ssize_t adp8860_bl_l3_dark_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLDM3); +} + +static ssize_t adp8860_bl_l3_dark_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLDM3); +} +static DEVICE_ATTR(l3_dark_dim, 0664, adp8860_bl_l3_dark_dim_show, + adp8860_bl_l3_dark_dim_store); + +static ssize_t adp8860_bl_l2_office_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLDM2); +} + +static ssize_t adp8860_bl_l2_office_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLDM2); +} +static DEVICE_ATTR(l2_office_dim, 0664, adp8860_bl_l2_office_dim_show, + adp8860_bl_l2_office_dim_store); + +static ssize_t adp8860_bl_l1_daylight_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLDM1); +} + +static ssize_t adp8860_bl_l1_daylight_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLDM1); +} +static DEVICE_ATTR(l1_daylight_dim, 0664, adp8860_bl_l1_daylight_dim_show, + adp8860_bl_l1_daylight_dim_store); + +#ifdef ADP8860_EXT_FEATURES +static ssize_t adp8860_bl_ambient_light_level_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + uint16_t ret_val; + + mutex_lock(&data->lock); + error = adp8860_read(data->client, ADP8860_PH1LEVL, ®_val); + ret_val = reg_val; + error |= adp8860_read(data->client, ADP8860_PH1LEVH, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + /* Return 13-bit conversion value for the first light sensor */ + ret_val += (reg_val & 0x1F) << 8; + + return sprintf(buf, "%u\n", ret_val); +} +static DEVICE_ATTR(ambient_light_level, 0444, + adp8860_bl_ambient_light_level_show, NULL); + +static ssize_t adp8860_bl_ambient_light_zone_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + + mutex_lock(&data->lock); + error = adp8860_read(data->client, ADP8860_CFGR, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + return sprintf(buf, "%u\n", + ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); +} + +static ssize_t adp8860_bl_ambient_light_zone_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + unsigned long val; + uint8_t reg_val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret) + return ret; + + if (val == 0) { + /* Enable automatic ambient light sensing */ + adp8860_set_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); + } else if ((val > 0) && (val <= 3)) { + /* Disable automatic ambient light sensing */ + adp8860_clr_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); + + /* Set user supplied ambient light zone */ + mutex_lock(&data->lock); + adp8860_read(data->client, ADP8860_CFGR, ®_val); + reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); + reg_val |= (val - 1) << CFGR_BLV_SHIFT; + adp8860_write(data->client, ADP8860_CFGR, reg_val); + mutex_unlock(&data->lock); + } + + return count; +} +static DEVICE_ATTR(ambient_light_zone, 0664, + adp8860_bl_ambient_light_zone_show, + adp8860_bl_ambient_light_zone_store); +#endif + +static struct attribute *adp8860_bl_attributes[] = { + &dev_attr_l3_dark_max.attr, + &dev_attr_l3_dark_dim.attr, + &dev_attr_l2_office_max.attr, + &dev_attr_l2_office_dim.attr, + &dev_attr_l1_daylight_max.attr, + &dev_attr_l1_daylight_dim.attr, +#ifdef ADP8860_EXT_FEATURES + &dev_attr_ambient_light_level.attr, + &dev_attr_ambient_light_zone.attr, +#endif + NULL +}; + +static const struct attribute_group adp8860_bl_attr_group = { + .attrs = adp8860_bl_attributes, +}; + +static int adp8860_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct backlight_device *bl; + struct adp8860_bl *data; + struct adp8860_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + struct backlight_properties props; + uint8_t reg_val; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); + return -EIO; + } + + if (!pdata) { + dev_err(&client->dev, "no platform data?\n"); + return -EINVAL; + } + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + ret = adp8860_read(client, ADP8860_MFDVID, ®_val); + if (ret < 0) + return ret; + + switch (ADP8860_MANID(reg_val)) { + case ADP8863_MANUFID: + data->gdwn_dis = !!pdata->gdwn_dis; + case ADP8860_MANUFID: + data->en_ambl_sens = !!pdata->en_ambl_sens; + break; + case ADP8861_MANUFID: + data->gdwn_dis = !!pdata->gdwn_dis; + break; + default: + dev_err(&client->dev, "failed to probe\n"); + return -ENODEV; + } + + /* It's confirmed that the DEVID field is actually a REVID */ + + data->revid = ADP8860_DEVID(reg_val); + data->client = client; + data->pdata = pdata; + data->id = id->driver_data; + data->current_brightness = 0; + i2c_set_clientdata(client, data); + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = ADP8860_MAX_BRIGHTNESS; + + mutex_init(&data->lock); + + bl = devm_backlight_device_register(&client->dev, + dev_driver_string(&client->dev), + &client->dev, data, &adp8860_bl_ops, &props); + if (IS_ERR(bl)) { + dev_err(&client->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.brightness = ADP8860_MAX_BRIGHTNESS; + + data->bl = bl; + + if (data->en_ambl_sens) + ret = sysfs_create_group(&bl->dev.kobj, + &adp8860_bl_attr_group); + + if (ret) { + dev_err(&client->dev, "failed to register sysfs\n"); + return ret; + } + + ret = adp8860_bl_setup(bl); + if (ret) { + ret = -EIO; + goto out; + } + + backlight_update_status(bl); + + dev_info(&client->dev, "%s Rev.%d Backlight\n", + client->name, data->revid); + + if (pdata->num_leds) + adp8860_led_probe(client); + + return 0; + +out: + if (data->en_ambl_sens) + sysfs_remove_group(&data->bl->dev.kobj, + &adp8860_bl_attr_group); + + return ret; +} + +static int adp8860_remove(struct i2c_client *client) +{ + struct adp8860_bl *data = i2c_get_clientdata(client); + + adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); + + if (data->led) + adp8860_led_remove(client); + + if (data->en_ambl_sens) + sysfs_remove_group(&data->bl->dev.kobj, + &adp8860_bl_attr_group); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int adp8860_i2c_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); + + return 0; +} + +static int adp8860_i2c_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + adp8860_set_bits(client, ADP8860_MDCR, NSTBY | BLEN); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(adp8860_i2c_pm_ops, adp8860_i2c_suspend, + adp8860_i2c_resume); + +static const struct i2c_device_id adp8860_id[] = { + { "adp8860", adp8860 }, + { "adp8861", adp8861 }, + { "adp8863", adp8863 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adp8860_id); + +static struct i2c_driver adp8860_driver = { + .driver = { + .name = KBUILD_MODNAME, + .pm = &adp8860_i2c_pm_ops, + }, + .probe = adp8860_probe, + .remove = adp8860_remove, + .id_table = adp8860_id, +}; + +module_i2c_driver(adp8860_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("ADP8860 Backlight driver"); +MODULE_ALIAS("i2c:adp8860-backlight"); diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c new file mode 100644 index 00000000000..251af4d38d8 --- /dev/null +++ b/drivers/video/backlight/adp8870_bl.c @@ -0,0 +1,991 @@ +/* + * Backlight driver for Analog Devices ADP8870 Backlight Devices + * + * Copyright 2009-2011 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/pm.h> +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/leds.h> +#include <linux/workqueue.h> +#include <linux/slab.h> + +#include <linux/i2c/adp8870.h> +#define ADP8870_EXT_FEATURES +#define ADP8870_USE_LEDS + + +#define ADP8870_MFDVID 0x00 /* Manufacturer and device ID */ +#define ADP8870_MDCR 0x01 /* Device mode and status */ +#define ADP8870_INT_STAT 0x02 /* Interrupts status */ +#define ADP8870_INT_EN 0x03 /* Interrupts enable */ +#define ADP8870_CFGR 0x04 /* Configuration register */ +#define ADP8870_BLSEL 0x05 /* Sink enable backlight or independent */ +#define ADP8870_PWMLED 0x06 /* PWM Enable Selection Register */ +#define ADP8870_BLOFF 0x07 /* Backlight off timeout */ +#define ADP8870_BLDIM 0x08 /* Backlight dim timeout */ +#define ADP8870_BLFR 0x09 /* Backlight fade in and out rates */ +#define ADP8870_BLMX1 0x0A /* Backlight (Brightness Level 1-daylight) maximum current */ +#define ADP8870_BLDM1 0x0B /* Backlight (Brightness Level 1-daylight) dim current */ +#define ADP8870_BLMX2 0x0C /* Backlight (Brightness Level 2-bright) maximum current */ +#define ADP8870_BLDM2 0x0D /* Backlight (Brightness Level 2-bright) dim current */ +#define ADP8870_BLMX3 0x0E /* Backlight (Brightness Level 3-office) maximum current */ +#define ADP8870_BLDM3 0x0F /* Backlight (Brightness Level 3-office) dim current */ +#define ADP8870_BLMX4 0x10 /* Backlight (Brightness Level 4-indoor) maximum current */ +#define ADP8870_BLDM4 0x11 /* Backlight (Brightness Level 4-indoor) dim current */ +#define ADP8870_BLMX5 0x12 /* Backlight (Brightness Level 5-dark) maximum current */ +#define ADP8870_BLDM5 0x13 /* Backlight (Brightness Level 5-dark) dim current */ +#define ADP8870_ISCLAW 0x1A /* Independent sink current fade law register */ +#define ADP8870_ISCC 0x1B /* Independent sink current control register */ +#define ADP8870_ISCT1 0x1C /* Independent Sink Current Timer Register LED[7:5] */ +#define ADP8870_ISCT2 0x1D /* Independent Sink Current Timer Register LED[4:1] */ +#define ADP8870_ISCF 0x1E /* Independent sink current fade register */ +#define ADP8870_ISC1 0x1F /* Independent Sink Current LED1 */ +#define ADP8870_ISC2 0x20 /* Independent Sink Current LED2 */ +#define ADP8870_ISC3 0x21 /* Independent Sink Current LED3 */ +#define ADP8870_ISC4 0x22 /* Independent Sink Current LED4 */ +#define ADP8870_ISC5 0x23 /* Independent Sink Current LED5 */ +#define ADP8870_ISC6 0x24 /* Independent Sink Current LED6 */ +#define ADP8870_ISC7 0x25 /* Independent Sink Current LED7 (Brightness Level 1-daylight) */ +#define ADP8870_ISC7_L2 0x26 /* Independent Sink Current LED7 (Brightness Level 2-bright) */ +#define ADP8870_ISC7_L3 0x27 /* Independent Sink Current LED7 (Brightness Level 3-office) */ +#define ADP8870_ISC7_L4 0x28 /* Independent Sink Current LED7 (Brightness Level 4-indoor) */ +#define ADP8870_ISC7_L5 0x29 /* Independent Sink Current LED7 (Brightness Level 5-dark) */ +#define ADP8870_CMP_CTL 0x2D /* ALS Comparator Control Register */ +#define ADP8870_ALS1_EN 0x2E /* Main ALS comparator level enable */ +#define ADP8870_ALS2_EN 0x2F /* Second ALS comparator level enable */ +#define ADP8870_ALS1_STAT 0x30 /* Main ALS Comparator Status Register */ +#define ADP8870_ALS2_STAT 0x31 /* Second ALS Comparator Status Register */ +#define ADP8870_L2TRP 0x32 /* L2 comparator reference */ +#define ADP8870_L2HYS 0x33 /* L2 hysteresis */ +#define ADP8870_L3TRP 0x34 /* L3 comparator reference */ +#define ADP8870_L3HYS 0x35 /* L3 hysteresis */ +#define ADP8870_L4TRP 0x36 /* L4 comparator reference */ +#define ADP8870_L4HYS 0x37 /* L4 hysteresis */ +#define ADP8870_L5TRP 0x38 /* L5 comparator reference */ +#define ADP8870_L5HYS 0x39 /* L5 hysteresis */ +#define ADP8870_PH1LEVL 0x40 /* First phototransistor ambient light level-low byte register */ +#define ADP8870_PH1LEVH 0x41 /* First phototransistor ambient light level-high byte register */ +#define ADP8870_PH2LEVL 0x42 /* Second phototransistor ambient light level-low byte register */ +#define ADP8870_PH2LEVH 0x43 /* Second phototransistor ambient light level-high byte register */ + +#define ADP8870_MANUFID 0x3 /* Analog Devices AD8870 Manufacturer and device ID */ +#define ADP8870_DEVID(x) ((x) & 0xF) +#define ADP8870_MANID(x) ((x) >> 4) + +/* MDCR Device mode and status */ +#define D7ALSEN (1 << 7) +#define INT_CFG (1 << 6) +#define NSTBY (1 << 5) +#define DIM_EN (1 << 4) +#define GDWN_DIS (1 << 3) +#define SIS_EN (1 << 2) +#define CMP_AUTOEN (1 << 1) +#define BLEN (1 << 0) + +/* ADP8870_ALS1_EN Main ALS comparator level enable */ +#define L5_EN (1 << 3) +#define L4_EN (1 << 2) +#define L3_EN (1 << 1) +#define L2_EN (1 << 0) + +#define CFGR_BLV_SHIFT 3 +#define CFGR_BLV_MASK 0x7 +#define ADP8870_FLAG_LED_MASK 0xFF + +#define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) +#define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) +#define ALS_CMPR_CFG_VAL(filt) ((0x7 & (filt)) << 1) + +struct adp8870_bl { + struct i2c_client *client; + struct backlight_device *bl; + struct adp8870_led *led; + struct adp8870_backlight_platform_data *pdata; + struct mutex lock; + unsigned long cached_daylight_max; + int id; + int revid; + int current_brightness; +}; + +struct adp8870_led { + struct led_classdev cdev; + struct work_struct work; + struct i2c_client *client; + enum led_brightness new_brightness; + int id; + int flags; +}; + +static int adp8870_read(struct i2c_client *client, int reg, uint8_t *val) +{ + int ret; + + ret = i2c_smbus_read_byte_data(client, reg); + if (ret < 0) { + dev_err(&client->dev, "failed reading at 0x%02x\n", reg); + return ret; + } + + *val = ret; + return 0; +} + + +static int adp8870_write(struct i2c_client *client, u8 reg, u8 val) +{ + int ret = i2c_smbus_write_byte_data(client, reg, val); + if (ret) + dev_err(&client->dev, "failed to write\n"); + + return ret; +} + +static int adp8870_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) +{ + struct adp8870_bl *data = i2c_get_clientdata(client); + uint8_t reg_val; + int ret; + + mutex_lock(&data->lock); + + ret = adp8870_read(client, reg, ®_val); + + if (!ret && ((reg_val & bit_mask) != bit_mask)) { + reg_val |= bit_mask; + ret = adp8870_write(client, reg, reg_val); + } + + mutex_unlock(&data->lock); + return ret; +} + +static int adp8870_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) +{ + struct adp8870_bl *data = i2c_get_clientdata(client); + uint8_t reg_val; + int ret; + + mutex_lock(&data->lock); + + ret = adp8870_read(client, reg, ®_val); + + if (!ret && (reg_val & bit_mask)) { + reg_val &= ~bit_mask; + ret = adp8870_write(client, reg, reg_val); + } + + mutex_unlock(&data->lock); + return ret; +} + +/* + * Independent sink / LED + */ +#if defined(ADP8870_USE_LEDS) +static void adp8870_led_work(struct work_struct *work) +{ + struct adp8870_led *led = container_of(work, struct adp8870_led, work); + adp8870_write(led->client, ADP8870_ISC1 + led->id - 1, + led->new_brightness >> 1); +} + +static void adp8870_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct adp8870_led *led; + + led = container_of(led_cdev, struct adp8870_led, cdev); + led->new_brightness = value; + /* + * Use workqueue for IO since I2C operations can sleep. + */ + schedule_work(&led->work); +} + +static int adp8870_led_setup(struct adp8870_led *led) +{ + struct i2c_client *client = led->client; + int ret = 0; + + ret = adp8870_write(client, ADP8870_ISC1 + led->id - 1, 0); + if (ret) + return ret; + + ret = adp8870_set_bits(client, ADP8870_ISCC, 1 << (led->id - 1)); + if (ret) + return ret; + + if (led->id > 4) + ret = adp8870_set_bits(client, ADP8870_ISCT1, + (led->flags & 0x3) << ((led->id - 5) * 2)); + else + ret = adp8870_set_bits(client, ADP8870_ISCT2, + (led->flags & 0x3) << ((led->id - 1) * 2)); + + return ret; +} + +static int adp8870_led_probe(struct i2c_client *client) +{ + struct adp8870_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + struct adp8870_bl *data = i2c_get_clientdata(client); + struct adp8870_led *led, *led_dat; + struct led_info *cur_led; + int ret, i; + + led = devm_kzalloc(&client->dev, pdata->num_leds * sizeof(*led), + GFP_KERNEL); + if (led == NULL) + return -ENOMEM; + + ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_ISCT1, + (pdata->led_on_time & 0x3) << 6); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_ISCF, + FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); + if (ret) + return ret; + + for (i = 0; i < pdata->num_leds; ++i) { + cur_led = &pdata->leds[i]; + led_dat = &led[i]; + + led_dat->id = cur_led->flags & ADP8870_FLAG_LED_MASK; + + if (led_dat->id > 7 || led_dat->id < 1) { + dev_err(&client->dev, "Invalid LED ID %d\n", + led_dat->id); + ret = -EINVAL; + goto err; + } + + if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { + dev_err(&client->dev, "LED %d used by Backlight\n", + led_dat->id); + ret = -EBUSY; + goto err; + } + + led_dat->cdev.name = cur_led->name; + led_dat->cdev.default_trigger = cur_led->default_trigger; + led_dat->cdev.brightness_set = adp8870_led_set; + led_dat->cdev.brightness = LED_OFF; + led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT; + led_dat->client = client; + led_dat->new_brightness = LED_OFF; + INIT_WORK(&led_dat->work, adp8870_led_work); + + ret = led_classdev_register(&client->dev, &led_dat->cdev); + if (ret) { + dev_err(&client->dev, "failed to register LED %d\n", + led_dat->id); + goto err; + } + + ret = adp8870_led_setup(led_dat); + if (ret) { + dev_err(&client->dev, "failed to write\n"); + i++; + goto err; + } + } + + data->led = led; + + return 0; + + err: + for (i = i - 1; i >= 0; --i) { + led_classdev_unregister(&led[i].cdev); + cancel_work_sync(&led[i].work); + } + + return ret; +} + +static int adp8870_led_remove(struct i2c_client *client) +{ + struct adp8870_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + struct adp8870_bl *data = i2c_get_clientdata(client); + int i; + + for (i = 0; i < pdata->num_leds; i++) { + led_classdev_unregister(&data->led[i].cdev); + cancel_work_sync(&data->led[i].work); + } + + return 0; +} +#else +static int adp8870_led_probe(struct i2c_client *client) +{ + return 0; +} + +static int adp8870_led_remove(struct i2c_client *client) +{ + return 0; +} +#endif + +static int adp8870_bl_set(struct backlight_device *bl, int brightness) +{ + struct adp8870_bl *data = bl_get_data(bl); + struct i2c_client *client = data->client; + int ret = 0; + + if (data->pdata->en_ambl_sens) { + if ((brightness > 0) && (brightness < ADP8870_MAX_BRIGHTNESS)) { + /* Disable Ambient Light auto adjust */ + ret = adp8870_clr_bits(client, ADP8870_MDCR, + CMP_AUTOEN); + if (ret) + return ret; + ret = adp8870_write(client, ADP8870_BLMX1, brightness); + if (ret) + return ret; + } else { + /* + * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust + * restore daylight l1 sysfs brightness + */ + ret = adp8870_write(client, ADP8870_BLMX1, + data->cached_daylight_max); + if (ret) + return ret; + + ret = adp8870_set_bits(client, ADP8870_MDCR, + CMP_AUTOEN); + if (ret) + return ret; + } + } else { + ret = adp8870_write(client, ADP8870_BLMX1, brightness); + if (ret) + return ret; + } + + if (data->current_brightness && brightness == 0) + ret = adp8870_set_bits(client, + ADP8870_MDCR, DIM_EN); + else if (data->current_brightness == 0 && brightness) + ret = adp8870_clr_bits(client, + ADP8870_MDCR, DIM_EN); + + if (!ret) + data->current_brightness = brightness; + + return ret; +} + +static int adp8870_bl_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + return adp8870_bl_set(bl, brightness); +} + +static int adp8870_bl_get_brightness(struct backlight_device *bl) +{ + struct adp8870_bl *data = bl_get_data(bl); + + return data->current_brightness; +} + +static const struct backlight_ops adp8870_bl_ops = { + .update_status = adp8870_bl_update_status, + .get_brightness = adp8870_bl_get_brightness, +}; + +static int adp8870_bl_setup(struct backlight_device *bl) +{ + struct adp8870_bl *data = bl_get_data(bl); + struct i2c_client *client = data->client; + struct adp8870_backlight_platform_data *pdata = data->pdata; + int ret = 0; + + ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim); + if (ret) + return ret; + + if (pdata->en_ambl_sens) { + data->cached_daylight_max = pdata->l1_daylight_max; + ret = adp8870_write(client, ADP8870_BLMX2, + pdata->l2_bright_max); + if (ret) + return ret; + ret = adp8870_write(client, ADP8870_BLDM2, + pdata->l2_bright_dim); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_BLMX3, + pdata->l3_office_max); + if (ret) + return ret; + ret = adp8870_write(client, ADP8870_BLDM3, + pdata->l3_office_dim); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_BLMX4, + pdata->l4_indoor_max); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_BLDM4, + pdata->l4_indor_dim); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_BLMX5, + pdata->l5_dark_max); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_BLDM5, + pdata->l5_dark_dim); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN | + L3_EN | L2_EN); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_CMP_CTL, + ALS_CMPR_CFG_VAL(pdata->abml_filt)); + if (ret) + return ret; + } + + ret = adp8870_write(client, ADP8870_CFGR, + BL_CFGR_VAL(pdata->bl_fade_law, 0)); + if (ret) + return ret; + + ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in, + pdata->bl_fade_out)); + if (ret) + return ret; + /* + * ADP8870 Rev0 requires GDWN_DIS bit set + */ + + ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY | + (data->revid == 0 ? GDWN_DIS : 0)); + + return ret; +} + +static ssize_t adp8870_show(struct device *dev, char *buf, int reg) +{ + struct adp8870_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + + mutex_lock(&data->lock); + error = adp8870_read(data->client, reg, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + return sprintf(buf, "%u\n", reg_val); +} + +static ssize_t adp8870_store(struct device *dev, const char *buf, + size_t count, int reg) +{ + struct adp8870_bl *data = dev_get_drvdata(dev); + unsigned long val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&data->lock); + adp8870_write(data->client, reg, val); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLMX5); +} + +static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLMX5); +} +static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show, + adp8870_bl_l5_dark_max_store); + + +static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLMX4); +} + +static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLMX4); +} +static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show, + adp8870_bl_l4_indoor_max_store); + + +static ssize_t adp8870_bl_l3_office_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLMX3); +} + +static ssize_t adp8870_bl_l3_office_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLMX3); +} + +static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show, + adp8870_bl_l3_office_max_store); + +static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLMX2); +} + +static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLMX2); +} +static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show, + adp8870_bl_l2_bright_max_store); + +static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLMX1); +} + +static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct adp8870_bl *data = dev_get_drvdata(dev); + int ret = kstrtoul(buf, 10, &data->cached_daylight_max); + if (ret) + return ret; + + return adp8870_store(dev, buf, count, ADP8870_BLMX1); +} +static DEVICE_ATTR(l1_daylight_max, 0664, adp8870_bl_l1_daylight_max_show, + adp8870_bl_l1_daylight_max_store); + +static ssize_t adp8870_bl_l5_dark_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLDM5); +} + +static ssize_t adp8870_bl_l5_dark_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLDM5); +} +static DEVICE_ATTR(l5_dark_dim, 0664, adp8870_bl_l5_dark_dim_show, + adp8870_bl_l5_dark_dim_store); + +static ssize_t adp8870_bl_l4_indoor_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLDM4); +} + +static ssize_t adp8870_bl_l4_indoor_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLDM4); +} +static DEVICE_ATTR(l4_indoor_dim, 0664, adp8870_bl_l4_indoor_dim_show, + adp8870_bl_l4_indoor_dim_store); + + +static ssize_t adp8870_bl_l3_office_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLDM3); +} + +static ssize_t adp8870_bl_l3_office_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLDM3); +} +static DEVICE_ATTR(l3_office_dim, 0664, adp8870_bl_l3_office_dim_show, + adp8870_bl_l3_office_dim_store); + +static ssize_t adp8870_bl_l2_bright_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLDM2); +} + +static ssize_t adp8870_bl_l2_bright_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLDM2); +} +static DEVICE_ATTR(l2_bright_dim, 0664, adp8870_bl_l2_bright_dim_show, + adp8870_bl_l2_bright_dim_store); + +static ssize_t adp8870_bl_l1_daylight_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8870_show(dev, buf, ADP8870_BLDM1); +} + +static ssize_t adp8870_bl_l1_daylight_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8870_store(dev, buf, count, ADP8870_BLDM1); +} +static DEVICE_ATTR(l1_daylight_dim, 0664, adp8870_bl_l1_daylight_dim_show, + adp8870_bl_l1_daylight_dim_store); + +#ifdef ADP8870_EXT_FEATURES +static ssize_t adp8870_bl_ambient_light_level_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adp8870_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + uint16_t ret_val; + + mutex_lock(&data->lock); + error = adp8870_read(data->client, ADP8870_PH1LEVL, ®_val); + if (error < 0) { + mutex_unlock(&data->lock); + return error; + } + ret_val = reg_val; + error = adp8870_read(data->client, ADP8870_PH1LEVH, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + /* Return 13-bit conversion value for the first light sensor */ + ret_val += (reg_val & 0x1F) << 8; + + return sprintf(buf, "%u\n", ret_val); +} +static DEVICE_ATTR(ambient_light_level, 0444, + adp8870_bl_ambient_light_level_show, NULL); + +static ssize_t adp8870_bl_ambient_light_zone_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adp8870_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + + mutex_lock(&data->lock); + error = adp8870_read(data->client, ADP8870_CFGR, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + return sprintf(buf, "%u\n", + ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); +} + +static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adp8870_bl *data = dev_get_drvdata(dev); + unsigned long val; + uint8_t reg_val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret) + return ret; + + if (val == 0) { + /* Enable automatic ambient light sensing */ + adp8870_set_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); + } else if ((val > 0) && (val < 6)) { + /* Disable automatic ambient light sensing */ + adp8870_clr_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); + + /* Set user supplied ambient light zone */ + mutex_lock(&data->lock); + adp8870_read(data->client, ADP8870_CFGR, ®_val); + reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); + reg_val |= (val - 1) << CFGR_BLV_SHIFT; + adp8870_write(data->client, ADP8870_CFGR, reg_val); + mutex_unlock(&data->lock); + } + + return count; +} +static DEVICE_ATTR(ambient_light_zone, 0664, + adp8870_bl_ambient_light_zone_show, + adp8870_bl_ambient_light_zone_store); +#endif + +static struct attribute *adp8870_bl_attributes[] = { + &dev_attr_l5_dark_max.attr, + &dev_attr_l5_dark_dim.attr, + &dev_attr_l4_indoor_max.attr, + &dev_attr_l4_indoor_dim.attr, + &dev_attr_l3_office_max.attr, + &dev_attr_l3_office_dim.attr, + &dev_attr_l2_bright_max.attr, + &dev_attr_l2_bright_dim.attr, + &dev_attr_l1_daylight_max.attr, + &dev_attr_l1_daylight_dim.attr, +#ifdef ADP8870_EXT_FEATURES + &dev_attr_ambient_light_level.attr, + &dev_attr_ambient_light_zone.attr, +#endif + NULL +}; + +static const struct attribute_group adp8870_bl_attr_group = { + .attrs = adp8870_bl_attributes, +}; + +static int adp8870_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct backlight_properties props; + struct backlight_device *bl; + struct adp8870_bl *data; + struct adp8870_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + uint8_t reg_val; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); + return -EIO; + } + + if (!pdata) { + dev_err(&client->dev, "no platform data?\n"); + return -EINVAL; + } + + ret = adp8870_read(client, ADP8870_MFDVID, ®_val); + if (ret < 0) + return -EIO; + + if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) { + dev_err(&client->dev, "failed to probe\n"); + return -ENODEV; + } + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + data->revid = ADP8870_DEVID(reg_val); + data->client = client; + data->pdata = pdata; + data->id = id->driver_data; + data->current_brightness = 0; + i2c_set_clientdata(client, data); + + mutex_init(&data->lock); + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS; + bl = devm_backlight_device_register(&client->dev, + dev_driver_string(&client->dev), + &client->dev, data, &adp8870_bl_ops, &props); + if (IS_ERR(bl)) { + dev_err(&client->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + data->bl = bl; + + if (pdata->en_ambl_sens) { + ret = sysfs_create_group(&bl->dev.kobj, + &adp8870_bl_attr_group); + if (ret) { + dev_err(&client->dev, "failed to register sysfs\n"); + return ret; + } + } + + ret = adp8870_bl_setup(bl); + if (ret) { + ret = -EIO; + goto out; + } + + backlight_update_status(bl); + + dev_info(&client->dev, "Rev.%d Backlight\n", data->revid); + + if (pdata->num_leds) + adp8870_led_probe(client); + + return 0; + +out: + if (data->pdata->en_ambl_sens) + sysfs_remove_group(&data->bl->dev.kobj, + &adp8870_bl_attr_group); + + return ret; +} + +static int adp8870_remove(struct i2c_client *client) +{ + struct adp8870_bl *data = i2c_get_clientdata(client); + + adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); + + if (data->led) + adp8870_led_remove(client); + + if (data->pdata->en_ambl_sens) + sysfs_remove_group(&data->bl->dev.kobj, + &adp8870_bl_attr_group); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int adp8870_i2c_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); + + return 0; +} + +static int adp8870_i2c_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(adp8870_i2c_pm_ops, adp8870_i2c_suspend, + adp8870_i2c_resume); + +static const struct i2c_device_id adp8870_id[] = { + { "adp8870", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adp8870_id); + +static struct i2c_driver adp8870_driver = { + .driver = { + .name = KBUILD_MODNAME, + .pm = &adp8870_i2c_pm_ops, + }, + .probe = adp8870_probe, + .remove = adp8870_remove, + .id_table = adp8870_id, +}; + +module_i2c_driver(adp8870_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("ADP8870 Backlight driver"); +MODULE_ALIAS("i2c:adp8870-backlight"); diff --git a/drivers/video/backlight/ams369fg06.c b/drivers/video/backlight/ams369fg06.c new file mode 100644 index 00000000000..d8952c4aa68 --- /dev/null +++ b/drivers/video/backlight/ams369fg06.c @@ -0,0 +1,577 @@ +/* + * ams369fg06 AMOLED LCD panel driver. + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * Author: Jingoo Han <jg1.han@samsung.com> + * + * Derived from drivers/video/s6e63m0.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/lcd.h> +#include <linux/module.h> +#include <linux/spi/spi.h> +#include <linux/wait.h> + +#define SLEEPMSEC 0x1000 +#define ENDDEF 0x2000 +#define DEFMASK 0xFF00 +#define COMMAND_ONLY 0xFE +#define DATA_ONLY 0xFF + +#define MAX_GAMMA_LEVEL 5 +#define GAMMA_TABLE_COUNT 21 + +#define MIN_BRIGHTNESS 0 +#define MAX_BRIGHTNESS 255 +#define DEFAULT_BRIGHTNESS 150 + +struct ams369fg06 { + struct device *dev; + struct spi_device *spi; + unsigned int power; + struct lcd_device *ld; + struct backlight_device *bd; + struct lcd_platform_data *lcd_pd; +}; + +static const unsigned short seq_display_on[] = { + 0x14, 0x03, + ENDDEF, 0x0000 +}; + +static const unsigned short seq_display_off[] = { + 0x14, 0x00, + ENDDEF, 0x0000 +}; + +static const unsigned short seq_stand_by_on[] = { + 0x1D, 0xA1, + SLEEPMSEC, 200, + ENDDEF, 0x0000 +}; + +static const unsigned short seq_stand_by_off[] = { + 0x1D, 0xA0, + SLEEPMSEC, 250, + ENDDEF, 0x0000 +}; + +static const unsigned short seq_setting[] = { + 0x31, 0x08, + 0x32, 0x14, + 0x30, 0x02, + 0x27, 0x01, + 0x12, 0x08, + 0x13, 0x08, + 0x15, 0x00, + 0x16, 0x00, + + 0xef, 0xd0, + DATA_ONLY, 0xe8, + + 0x39, 0x44, + 0x40, 0x00, + 0x41, 0x3f, + 0x42, 0x2a, + 0x43, 0x27, + 0x44, 0x27, + 0x45, 0x1f, + 0x46, 0x44, + 0x50, 0x00, + 0x51, 0x00, + 0x52, 0x17, + 0x53, 0x24, + 0x54, 0x26, + 0x55, 0x1f, + 0x56, 0x43, + 0x60, 0x00, + 0x61, 0x3f, + 0x62, 0x2a, + 0x63, 0x25, + 0x64, 0x24, + 0x65, 0x1b, + 0x66, 0x5c, + + 0x17, 0x22, + 0x18, 0x33, + 0x19, 0x03, + 0x1a, 0x01, + 0x22, 0xa4, + 0x23, 0x00, + 0x26, 0xa0, + + 0x1d, 0xa0, + SLEEPMSEC, 300, + + 0x14, 0x03, + + ENDDEF, 0x0000 +}; + +/* gamma value: 2.2 */ +static const unsigned int ams369fg06_22_250[] = { + 0x00, 0x3f, 0x2a, 0x27, 0x27, 0x1f, 0x44, + 0x00, 0x00, 0x17, 0x24, 0x26, 0x1f, 0x43, + 0x00, 0x3f, 0x2a, 0x25, 0x24, 0x1b, 0x5c, +}; + +static const unsigned int ams369fg06_22_200[] = { + 0x00, 0x3f, 0x28, 0x29, 0x27, 0x21, 0x3e, + 0x00, 0x00, 0x10, 0x25, 0x27, 0x20, 0x3d, + 0x00, 0x3f, 0x28, 0x27, 0x25, 0x1d, 0x53, +}; + +static const unsigned int ams369fg06_22_150[] = { + 0x00, 0x3f, 0x2d, 0x29, 0x28, 0x23, 0x37, + 0x00, 0x00, 0x0b, 0x25, 0x28, 0x22, 0x36, + 0x00, 0x3f, 0x2b, 0x28, 0x26, 0x1f, 0x4a, +}; + +static const unsigned int ams369fg06_22_100[] = { + 0x00, 0x3f, 0x30, 0x2a, 0x2b, 0x24, 0x2f, + 0x00, 0x00, 0x00, 0x25, 0x29, 0x24, 0x2e, + 0x00, 0x3f, 0x2f, 0x29, 0x29, 0x21, 0x3f, +}; + +static const unsigned int ams369fg06_22_50[] = { + 0x00, 0x3f, 0x3c, 0x2c, 0x2d, 0x27, 0x24, + 0x00, 0x00, 0x00, 0x22, 0x2a, 0x27, 0x23, + 0x00, 0x3f, 0x3b, 0x2c, 0x2b, 0x24, 0x31, +}; + +struct ams369fg06_gamma { + unsigned int *gamma_22_table[MAX_GAMMA_LEVEL]; +}; + +static struct ams369fg06_gamma gamma_table = { + .gamma_22_table[0] = (unsigned int *)&ams369fg06_22_50, + .gamma_22_table[1] = (unsigned int *)&ams369fg06_22_100, + .gamma_22_table[2] = (unsigned int *)&ams369fg06_22_150, + .gamma_22_table[3] = (unsigned int *)&ams369fg06_22_200, + .gamma_22_table[4] = (unsigned int *)&ams369fg06_22_250, +}; + +static int ams369fg06_spi_write_byte(struct ams369fg06 *lcd, int addr, int data) +{ + u16 buf[1]; + struct spi_message msg; + + struct spi_transfer xfer = { + .len = 2, + .tx_buf = buf, + }; + + buf[0] = (addr << 8) | data; + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + return spi_sync(lcd->spi, &msg); +} + +static int ams369fg06_spi_write(struct ams369fg06 *lcd, unsigned char address, + unsigned char command) +{ + int ret = 0; + + if (address != DATA_ONLY) + ret = ams369fg06_spi_write_byte(lcd, 0x70, address); + if (command != COMMAND_ONLY) + ret = ams369fg06_spi_write_byte(lcd, 0x72, command); + + return ret; +} + +static int ams369fg06_panel_send_sequence(struct ams369fg06 *lcd, + const unsigned short *wbuf) +{ + int ret = 0, i = 0; + + while ((wbuf[i] & DEFMASK) != ENDDEF) { + if ((wbuf[i] & DEFMASK) != SLEEPMSEC) { + ret = ams369fg06_spi_write(lcd, wbuf[i], wbuf[i+1]); + if (ret) + break; + } else { + msleep(wbuf[i+1]); + } + i += 2; + } + + return ret; +} + +static int _ams369fg06_gamma_ctl(struct ams369fg06 *lcd, + const unsigned int *gamma) +{ + unsigned int i = 0; + int ret = 0; + + for (i = 0 ; i < GAMMA_TABLE_COUNT / 3; i++) { + ret = ams369fg06_spi_write(lcd, 0x40 + i, gamma[i]); + ret = ams369fg06_spi_write(lcd, 0x50 + i, gamma[i+7*1]); + ret = ams369fg06_spi_write(lcd, 0x60 + i, gamma[i+7*2]); + if (ret) { + dev_err(lcd->dev, "failed to set gamma table.\n"); + goto gamma_err; + } + } + +gamma_err: + return ret; +} + +static int ams369fg06_gamma_ctl(struct ams369fg06 *lcd, int brightness) +{ + int ret = 0; + int gamma = 0; + + if ((brightness >= 0) && (brightness <= 50)) + gamma = 0; + else if ((brightness > 50) && (brightness <= 100)) + gamma = 1; + else if ((brightness > 100) && (brightness <= 150)) + gamma = 2; + else if ((brightness > 150) && (brightness <= 200)) + gamma = 3; + else if ((brightness > 200) && (brightness <= 255)) + gamma = 4; + + ret = _ams369fg06_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]); + + return ret; +} + +static int ams369fg06_ldi_init(struct ams369fg06 *lcd) +{ + int ret, i; + static const unsigned short *init_seq[] = { + seq_setting, + seq_stand_by_off, + }; + + for (i = 0; i < ARRAY_SIZE(init_seq); i++) { + ret = ams369fg06_panel_send_sequence(lcd, init_seq[i]); + if (ret) + break; + } + + return ret; +} + +static int ams369fg06_ldi_enable(struct ams369fg06 *lcd) +{ + int ret, i; + static const unsigned short *init_seq[] = { + seq_stand_by_off, + seq_display_on, + }; + + for (i = 0; i < ARRAY_SIZE(init_seq); i++) { + ret = ams369fg06_panel_send_sequence(lcd, init_seq[i]); + if (ret) + break; + } + + return ret; +} + +static int ams369fg06_ldi_disable(struct ams369fg06 *lcd) +{ + int ret, i; + + static const unsigned short *init_seq[] = { + seq_display_off, + seq_stand_by_on, + }; + + for (i = 0; i < ARRAY_SIZE(init_seq); i++) { + ret = ams369fg06_panel_send_sequence(lcd, init_seq[i]); + if (ret) + break; + } + + return ret; +} + +static int ams369fg06_power_is_on(int power) +{ + return power <= FB_BLANK_NORMAL; +} + +static int ams369fg06_power_on(struct ams369fg06 *lcd) +{ + int ret = 0; + struct lcd_platform_data *pd; + struct backlight_device *bd; + + pd = lcd->lcd_pd; + bd = lcd->bd; + + if (pd->power_on) { + pd->power_on(lcd->ld, 1); + msleep(pd->power_on_delay); + } + + if (!pd->reset) { + dev_err(lcd->dev, "reset is NULL.\n"); + return -EINVAL; + } else { + pd->reset(lcd->ld); + msleep(pd->reset_delay); + } + + ret = ams369fg06_ldi_init(lcd); + if (ret) { + dev_err(lcd->dev, "failed to initialize ldi.\n"); + return ret; + } + + ret = ams369fg06_ldi_enable(lcd); + if (ret) { + dev_err(lcd->dev, "failed to enable ldi.\n"); + return ret; + } + + /* set brightness to current value after power on or resume. */ + ret = ams369fg06_gamma_ctl(lcd, bd->props.brightness); + if (ret) { + dev_err(lcd->dev, "lcd gamma setting failed.\n"); + return ret; + } + + return 0; +} + +static int ams369fg06_power_off(struct ams369fg06 *lcd) +{ + int ret; + struct lcd_platform_data *pd; + + pd = lcd->lcd_pd; + + ret = ams369fg06_ldi_disable(lcd); + if (ret) { + dev_err(lcd->dev, "lcd setting failed.\n"); + return -EIO; + } + + msleep(pd->power_off_delay); + + if (pd->power_on) + pd->power_on(lcd->ld, 0); + + return 0; +} + +static int ams369fg06_power(struct ams369fg06 *lcd, int power) +{ + int ret = 0; + + if (ams369fg06_power_is_on(power) && + !ams369fg06_power_is_on(lcd->power)) + ret = ams369fg06_power_on(lcd); + else if (!ams369fg06_power_is_on(power) && + ams369fg06_power_is_on(lcd->power)) + ret = ams369fg06_power_off(lcd); + + if (!ret) + lcd->power = power; + + return ret; +} + +static int ams369fg06_get_power(struct lcd_device *ld) +{ + struct ams369fg06 *lcd = lcd_get_data(ld); + + return lcd->power; +} + +static int ams369fg06_set_power(struct lcd_device *ld, int power) +{ + struct ams369fg06 *lcd = lcd_get_data(ld); + + if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && + power != FB_BLANK_NORMAL) { + dev_err(lcd->dev, "power value should be 0, 1 or 4.\n"); + return -EINVAL; + } + + return ams369fg06_power(lcd, power); +} + +static int ams369fg06_get_brightness(struct backlight_device *bd) +{ + return bd->props.brightness; +} + +static int ams369fg06_set_brightness(struct backlight_device *bd) +{ + int ret = 0; + int brightness = bd->props.brightness; + struct ams369fg06 *lcd = bl_get_data(bd); + + if (brightness < MIN_BRIGHTNESS || + brightness > bd->props.max_brightness) { + dev_err(&bd->dev, "lcd brightness should be %d to %d.\n", + MIN_BRIGHTNESS, MAX_BRIGHTNESS); + return -EINVAL; + } + + ret = ams369fg06_gamma_ctl(lcd, bd->props.brightness); + if (ret) { + dev_err(&bd->dev, "lcd brightness setting failed.\n"); + return -EIO; + } + + return ret; +} + +static struct lcd_ops ams369fg06_lcd_ops = { + .get_power = ams369fg06_get_power, + .set_power = ams369fg06_set_power, +}; + +static const struct backlight_ops ams369fg06_backlight_ops = { + .get_brightness = ams369fg06_get_brightness, + .update_status = ams369fg06_set_brightness, +}; + +static int ams369fg06_probe(struct spi_device *spi) +{ + int ret = 0; + struct ams369fg06 *lcd = NULL; + struct lcd_device *ld = NULL; + struct backlight_device *bd = NULL; + struct backlight_properties props; + + lcd = devm_kzalloc(&spi->dev, sizeof(struct ams369fg06), GFP_KERNEL); + if (!lcd) + return -ENOMEM; + + /* ams369fg06 lcd panel uses 3-wire 16bits SPI Mode. */ + spi->bits_per_word = 16; + + ret = spi_setup(spi); + if (ret < 0) { + dev_err(&spi->dev, "spi setup failed.\n"); + return ret; + } + + lcd->spi = spi; + lcd->dev = &spi->dev; + + lcd->lcd_pd = dev_get_platdata(&spi->dev); + if (!lcd->lcd_pd) { + dev_err(&spi->dev, "platform data is NULL\n"); + return -EINVAL; + } + + ld = devm_lcd_device_register(&spi->dev, "ams369fg06", &spi->dev, lcd, + &ams369fg06_lcd_ops); + if (IS_ERR(ld)) + return PTR_ERR(ld); + + lcd->ld = ld; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = MAX_BRIGHTNESS; + + bd = devm_backlight_device_register(&spi->dev, "ams369fg06-bl", + &spi->dev, lcd, + &ams369fg06_backlight_ops, &props); + if (IS_ERR(bd)) + return PTR_ERR(bd); + + bd->props.brightness = DEFAULT_BRIGHTNESS; + lcd->bd = bd; + + if (!lcd->lcd_pd->lcd_enabled) { + /* + * if lcd panel was off from bootloader then + * current lcd status is powerdown and then + * it enables lcd panel. + */ + lcd->power = FB_BLANK_POWERDOWN; + + ams369fg06_power(lcd, FB_BLANK_UNBLANK); + } else { + lcd->power = FB_BLANK_UNBLANK; + } + + spi_set_drvdata(spi, lcd); + + dev_info(&spi->dev, "ams369fg06 panel driver has been probed.\n"); + + return 0; +} + +static int ams369fg06_remove(struct spi_device *spi) +{ + struct ams369fg06 *lcd = spi_get_drvdata(spi); + + ams369fg06_power(lcd, FB_BLANK_POWERDOWN); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int ams369fg06_suspend(struct device *dev) +{ + struct ams369fg06 *lcd = dev_get_drvdata(dev); + + dev_dbg(dev, "lcd->power = %d\n", lcd->power); + + /* + * when lcd panel is suspend, lcd panel becomes off + * regardless of status. + */ + return ams369fg06_power(lcd, FB_BLANK_POWERDOWN); +} + +static int ams369fg06_resume(struct device *dev) +{ + struct ams369fg06 *lcd = dev_get_drvdata(dev); + + lcd->power = FB_BLANK_POWERDOWN; + + return ams369fg06_power(lcd, FB_BLANK_UNBLANK); +} +#endif + +static SIMPLE_DEV_PM_OPS(ams369fg06_pm_ops, ams369fg06_suspend, + ams369fg06_resume); + +static void ams369fg06_shutdown(struct spi_device *spi) +{ + struct ams369fg06 *lcd = spi_get_drvdata(spi); + + ams369fg06_power(lcd, FB_BLANK_POWERDOWN); +} + +static struct spi_driver ams369fg06_driver = { + .driver = { + .name = "ams369fg06", + .owner = THIS_MODULE, + .pm = &ams369fg06_pm_ops, + }, + .probe = ams369fg06_probe, + .remove = ams369fg06_remove, + .shutdown = ams369fg06_shutdown, +}; + +module_spi_driver(ams369fg06_driver); + +MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); +MODULE_DESCRIPTION("ams369fg06 LCD Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/apple_bl.c b/drivers/video/backlight/apple_bl.c new file mode 100644 index 00000000000..d8432967668 --- /dev/null +++ b/drivers/video/backlight/apple_bl.c @@ -0,0 +1,257 @@ +/* + * Backlight Driver for Intel-based Apples + * + * Copyright (c) Red Hat <mjg@redhat.com> + * Based on code from Pommed: + * Copyright (C) 2006 Nicolas Boichat <nicolas @boichat.ch> + * Copyright (C) 2006 Felipe Alfaro Solana <felipe_alfaro @linuxmail.org> + * Copyright (C) 2007 Julien BLACHE <jb@jblache.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This driver triggers SMIs which cause the firmware to change the + * backlight brightness. This is icky in many ways, but it's impractical to + * get at the firmware code in order to figure out what it's actually doing. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/pci.h> +#include <linux/acpi.h> +#include <linux/atomic.h> +#include <linux/apple_bl.h> + +static struct backlight_device *apple_backlight_device; + +struct hw_data { + /* I/O resource to allocate. */ + unsigned long iostart; + unsigned long iolen; + /* Backlight operations structure. */ + const struct backlight_ops backlight_ops; + void (*set_brightness)(int); +}; + +static const struct hw_data *hw_data; + +/* Module parameters. */ +static int debug; +module_param_named(debug, debug, int, 0644); +MODULE_PARM_DESC(debug, "Set to one to enable debugging messages."); + +/* + * Implementation for machines with Intel chipset. + */ +static void intel_chipset_set_brightness(int intensity) +{ + outb(0x04 | (intensity << 4), 0xb3); + outb(0xbf, 0xb2); +} + +static int intel_chipset_send_intensity(struct backlight_device *bd) +{ + int intensity = bd->props.brightness; + + if (debug) + pr_debug("setting brightness to %d\n", intensity); + + intel_chipset_set_brightness(intensity); + return 0; +} + +static int intel_chipset_get_intensity(struct backlight_device *bd) +{ + int intensity; + + outb(0x03, 0xb3); + outb(0xbf, 0xb2); + intensity = inb(0xb3) >> 4; + + if (debug) + pr_debug("read brightness of %d\n", intensity); + + return intensity; +} + +static const struct hw_data intel_chipset_data = { + .iostart = 0xb2, + .iolen = 2, + .backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .get_brightness = intel_chipset_get_intensity, + .update_status = intel_chipset_send_intensity, + }, + .set_brightness = intel_chipset_set_brightness, +}; + +/* + * Implementation for machines with Nvidia chipset. + */ +static void nvidia_chipset_set_brightness(int intensity) +{ + outb(0x04 | (intensity << 4), 0x52f); + outb(0xbf, 0x52e); +} + +static int nvidia_chipset_send_intensity(struct backlight_device *bd) +{ + int intensity = bd->props.brightness; + + if (debug) + pr_debug("setting brightness to %d\n", intensity); + + nvidia_chipset_set_brightness(intensity); + return 0; +} + +static int nvidia_chipset_get_intensity(struct backlight_device *bd) +{ + int intensity; + + outb(0x03, 0x52f); + outb(0xbf, 0x52e); + intensity = inb(0x52f) >> 4; + + if (debug) + pr_debug("read brightness of %d\n", intensity); + + return intensity; +} + +static const struct hw_data nvidia_chipset_data = { + .iostart = 0x52e, + .iolen = 2, + .backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .get_brightness = nvidia_chipset_get_intensity, + .update_status = nvidia_chipset_send_intensity + }, + .set_brightness = nvidia_chipset_set_brightness, +}; + +static int apple_bl_add(struct acpi_device *dev) +{ + struct backlight_properties props; + struct pci_dev *host; + int intensity; + + host = pci_get_bus_and_slot(0, 0); + + if (!host) { + pr_err("unable to find PCI host\n"); + return -ENODEV; + } + + if (host->vendor == PCI_VENDOR_ID_INTEL) + hw_data = &intel_chipset_data; + else if (host->vendor == PCI_VENDOR_ID_NVIDIA) + hw_data = &nvidia_chipset_data; + + pci_dev_put(host); + + if (!hw_data) { + pr_err("unknown hardware\n"); + return -ENODEV; + } + + /* Check that the hardware responds - this may not work under EFI */ + + intensity = hw_data->backlight_ops.get_brightness(NULL); + + if (!intensity) { + hw_data->set_brightness(1); + if (!hw_data->backlight_ops.get_brightness(NULL)) + return -ENODEV; + + hw_data->set_brightness(0); + } + + if (!request_region(hw_data->iostart, hw_data->iolen, + "Apple backlight")) + return -ENXIO; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_PLATFORM; + props.max_brightness = 15; + apple_backlight_device = backlight_device_register("apple_backlight", + NULL, NULL, &hw_data->backlight_ops, &props); + + if (IS_ERR(apple_backlight_device)) { + release_region(hw_data->iostart, hw_data->iolen); + return PTR_ERR(apple_backlight_device); + } + + apple_backlight_device->props.brightness = + hw_data->backlight_ops.get_brightness(apple_backlight_device); + backlight_update_status(apple_backlight_device); + + return 0; +} + +static int apple_bl_remove(struct acpi_device *dev) +{ + backlight_device_unregister(apple_backlight_device); + + release_region(hw_data->iostart, hw_data->iolen); + hw_data = NULL; + return 0; +} + +static const struct acpi_device_id apple_bl_ids[] = { + {"APP0002", 0}, + {"", 0}, +}; + +static struct acpi_driver apple_bl_driver = { + .name = "Apple backlight", + .ids = apple_bl_ids, + .ops = { + .add = apple_bl_add, + .remove = apple_bl_remove, + }, +}; + +static atomic_t apple_bl_registered = ATOMIC_INIT(0); + +int apple_bl_register(void) +{ + if (atomic_xchg(&apple_bl_registered, 1) == 0) + return acpi_bus_register_driver(&apple_bl_driver); + + return 0; +} +EXPORT_SYMBOL_GPL(apple_bl_register); + +void apple_bl_unregister(void) +{ + if (atomic_xchg(&apple_bl_registered, 0) == 1) + acpi_bus_unregister_driver(&apple_bl_driver); +} +EXPORT_SYMBOL_GPL(apple_bl_unregister); + +static int __init apple_bl_init(void) +{ + return apple_bl_register(); +} + +static void __exit apple_bl_exit(void) +{ + apple_bl_unregister(); +} + +module_init(apple_bl_init); +module_exit(apple_bl_exit); + +MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); +MODULE_DESCRIPTION("Apple Backlight Driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(acpi, apple_bl_ids); +MODULE_ALIAS("mbp_nvidia_bl"); diff --git a/drivers/video/backlight/as3711_bl.c b/drivers/video/backlight/as3711_bl.c new file mode 100644 index 00000000000..bb1fc45b754 --- /dev/null +++ b/drivers/video/backlight/as3711_bl.c @@ -0,0 +1,480 @@ +/* + * AS3711 PMIC backlight driver, using DCDC Step Up Converters + * + * Copyright (C) 2012 Renesas Electronics Corporation + * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the version 2 of the GNU General Public License as + * published by the Free Software Foundation + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/kernel.h> +#include <linux/mfd/as3711.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +enum as3711_bl_type { + AS3711_BL_SU1, + AS3711_BL_SU2, +}; + +struct as3711_bl_data { + bool powered; + const char *fb_name; + struct device *fb_dev; + enum as3711_bl_type type; + int brightness; + struct backlight_device *bl; +}; + +struct as3711_bl_supply { + struct as3711_bl_data su1; + struct as3711_bl_data su2; + const struct as3711_bl_pdata *pdata; + struct as3711 *as3711; +}; + +static struct as3711_bl_supply *to_supply(struct as3711_bl_data *su) +{ + switch (su->type) { + case AS3711_BL_SU1: + return container_of(su, struct as3711_bl_supply, su1); + case AS3711_BL_SU2: + return container_of(su, struct as3711_bl_supply, su2); + } + return NULL; +} + +static int as3711_set_brightness_auto_i(struct as3711_bl_data *data, + unsigned int brightness) +{ + struct as3711_bl_supply *supply = to_supply(data); + struct as3711 *as3711 = supply->as3711; + const struct as3711_bl_pdata *pdata = supply->pdata; + int ret = 0; + + /* Only all equal current values are supported */ + if (pdata->su2_auto_curr1) + ret = regmap_write(as3711->regmap, AS3711_CURR1_VALUE, + brightness); + if (!ret && pdata->su2_auto_curr2) + ret = regmap_write(as3711->regmap, AS3711_CURR2_VALUE, + brightness); + if (!ret && pdata->su2_auto_curr3) + ret = regmap_write(as3711->regmap, AS3711_CURR3_VALUE, + brightness); + + return ret; +} + +static int as3711_set_brightness_v(struct as3711 *as3711, + unsigned int brightness, + unsigned int reg) +{ + if (brightness > 31) + return -EINVAL; + + return regmap_update_bits(as3711->regmap, reg, 0xf0, + brightness << 4); +} + +static int as3711_bl_su2_reset(struct as3711_bl_supply *supply) +{ + struct as3711 *as3711 = supply->as3711; + int ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_5, + 3, supply->pdata->su2_fbprot); + if (!ret) + ret = regmap_update_bits(as3711->regmap, + AS3711_STEPUP_CONTROL_2, 1, 0); + if (!ret) + ret = regmap_update_bits(as3711->regmap, + AS3711_STEPUP_CONTROL_2, 1, 1); + return ret; +} + +/* + * Someone with less fragile or less expensive hardware could try to simplify + * the brightness adjustment procedure. + */ +static int as3711_bl_update_status(struct backlight_device *bl) +{ + struct as3711_bl_data *data = bl_get_data(bl); + struct as3711_bl_supply *supply = to_supply(data); + struct as3711 *as3711 = supply->as3711; + int brightness = bl->props.brightness; + int ret = 0; + + dev_dbg(&bl->dev, "%s(): brightness %u, pwr %x, blank %x, state %x\n", + __func__, bl->props.brightness, bl->props.power, + bl->props.fb_blank, bl->props.state); + + if (bl->props.power != FB_BLANK_UNBLANK || + bl->props.fb_blank != FB_BLANK_UNBLANK || + bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + brightness = 0; + + if (data->type == AS3711_BL_SU1) { + ret = as3711_set_brightness_v(as3711, brightness, + AS3711_STEPUP_CONTROL_1); + } else { + const struct as3711_bl_pdata *pdata = supply->pdata; + + switch (pdata->su2_feedback) { + case AS3711_SU2_VOLTAGE: + ret = as3711_set_brightness_v(as3711, brightness, + AS3711_STEPUP_CONTROL_2); + break; + case AS3711_SU2_CURR_AUTO: + ret = as3711_set_brightness_auto_i(data, brightness / 4); + if (ret < 0) + return ret; + if (brightness) { + ret = as3711_bl_su2_reset(supply); + if (ret < 0) + return ret; + udelay(500); + ret = as3711_set_brightness_auto_i(data, brightness); + } else { + ret = regmap_update_bits(as3711->regmap, + AS3711_STEPUP_CONTROL_2, 1, 0); + } + break; + /* Manual one current feedback pin below */ + case AS3711_SU2_CURR1: + ret = regmap_write(as3711->regmap, AS3711_CURR1_VALUE, + brightness); + break; + case AS3711_SU2_CURR2: + ret = regmap_write(as3711->regmap, AS3711_CURR2_VALUE, + brightness); + break; + case AS3711_SU2_CURR3: + ret = regmap_write(as3711->regmap, AS3711_CURR3_VALUE, + brightness); + break; + default: + ret = -EINVAL; + } + } + if (!ret) + data->brightness = brightness; + + return ret; +} + +static int as3711_bl_get_brightness(struct backlight_device *bl) +{ + struct as3711_bl_data *data = bl_get_data(bl); + + return data->brightness; +} + +static const struct backlight_ops as3711_bl_ops = { + .update_status = as3711_bl_update_status, + .get_brightness = as3711_bl_get_brightness, +}; + +static int as3711_bl_init_su2(struct as3711_bl_supply *supply) +{ + struct as3711 *as3711 = supply->as3711; + const struct as3711_bl_pdata *pdata = supply->pdata; + u8 ctl = 0; + int ret; + + dev_dbg(as3711->dev, "%s(): use %u\n", __func__, pdata->su2_feedback); + + /* Turn SU2 off */ + ret = regmap_write(as3711->regmap, AS3711_STEPUP_CONTROL_2, 0); + if (ret < 0) + return ret; + + switch (pdata->su2_feedback) { + case AS3711_SU2_VOLTAGE: + ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_4, 3, 0); + break; + case AS3711_SU2_CURR1: + ctl = 1; + ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_4, 3, 1); + break; + case AS3711_SU2_CURR2: + ctl = 4; + ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_4, 3, 2); + break; + case AS3711_SU2_CURR3: + ctl = 0x10; + ret = regmap_update_bits(as3711->regmap, AS3711_STEPUP_CONTROL_4, 3, 3); + break; + case AS3711_SU2_CURR_AUTO: + if (pdata->su2_auto_curr1) + ctl = 2; + if (pdata->su2_auto_curr2) + ctl |= 8; + if (pdata->su2_auto_curr3) + ctl |= 0x20; + ret = 0; + break; + default: + return -EINVAL; + } + + if (!ret) + ret = regmap_write(as3711->regmap, AS3711_CURR_CONTROL, ctl); + + return ret; +} + +static int as3711_bl_register(struct platform_device *pdev, + unsigned int max_brightness, struct as3711_bl_data *su) +{ + struct backlight_properties props = {.type = BACKLIGHT_RAW,}; + struct backlight_device *bl; + + /* max tuning I = 31uA for voltage- and 38250uA for current-feedback */ + props.max_brightness = max_brightness; + + bl = devm_backlight_device_register(&pdev->dev, + su->type == AS3711_BL_SU1 ? + "as3711-su1" : "as3711-su2", + &pdev->dev, su, + &as3711_bl_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.brightness = props.max_brightness; + + backlight_update_status(bl); + + su->bl = bl; + + return 0; +} + +static int as3711_backlight_parse_dt(struct device *dev) +{ + struct as3711_bl_pdata *pdata = dev_get_platdata(dev); + struct device_node *bl = + of_find_node_by_name(dev->parent->of_node, "backlight"), *fb; + int ret; + + if (!bl) { + dev_dbg(dev, "backlight node not found\n"); + return -ENODEV; + } + + fb = of_parse_phandle(bl, "su1-dev", 0); + if (fb) { + pdata->su1_fb = fb->full_name; + + ret = of_property_read_u32(bl, "su1-max-uA", &pdata->su1_max_uA); + if (pdata->su1_max_uA <= 0) + ret = -EINVAL; + if (ret < 0) + return ret; + } + + fb = of_parse_phandle(bl, "su2-dev", 0); + if (fb) { + int count = 0; + + pdata->su2_fb = fb->full_name; + + ret = of_property_read_u32(bl, "su2-max-uA", &pdata->su2_max_uA); + if (pdata->su2_max_uA <= 0) + ret = -EINVAL; + if (ret < 0) + return ret; + + if (of_find_property(bl, "su2-feedback-voltage", NULL)) { + pdata->su2_feedback = AS3711_SU2_VOLTAGE; + count++; + } + if (of_find_property(bl, "su2-feedback-curr1", NULL)) { + pdata->su2_feedback = AS3711_SU2_CURR1; + count++; + } + if (of_find_property(bl, "su2-feedback-curr2", NULL)) { + pdata->su2_feedback = AS3711_SU2_CURR2; + count++; + } + if (of_find_property(bl, "su2-feedback-curr3", NULL)) { + pdata->su2_feedback = AS3711_SU2_CURR3; + count++; + } + if (of_find_property(bl, "su2-feedback-curr-auto", NULL)) { + pdata->su2_feedback = AS3711_SU2_CURR_AUTO; + count++; + } + if (count != 1) + return -EINVAL; + + count = 0; + if (of_find_property(bl, "su2-fbprot-lx-sd4", NULL)) { + pdata->su2_fbprot = AS3711_SU2_LX_SD4; + count++; + } + if (of_find_property(bl, "su2-fbprot-gpio2", NULL)) { + pdata->su2_fbprot = AS3711_SU2_GPIO2; + count++; + } + if (of_find_property(bl, "su2-fbprot-gpio3", NULL)) { + pdata->su2_fbprot = AS3711_SU2_GPIO3; + count++; + } + if (of_find_property(bl, "su2-fbprot-gpio4", NULL)) { + pdata->su2_fbprot = AS3711_SU2_GPIO4; + count++; + } + if (count != 1) + return -EINVAL; + + count = 0; + if (of_find_property(bl, "su2-auto-curr1", NULL)) { + pdata->su2_auto_curr1 = true; + count++; + } + if (of_find_property(bl, "su2-auto-curr2", NULL)) { + pdata->su2_auto_curr2 = true; + count++; + } + if (of_find_property(bl, "su2-auto-curr3", NULL)) { + pdata->su2_auto_curr3 = true; + count++; + } + + /* + * At least one su2-auto-curr* must be specified iff + * AS3711_SU2_CURR_AUTO is used + */ + if (!count ^ (pdata->su2_feedback != AS3711_SU2_CURR_AUTO)) + return -EINVAL; + } + + return 0; +} + +static int as3711_backlight_probe(struct platform_device *pdev) +{ + struct as3711_bl_pdata *pdata = dev_get_platdata(&pdev->dev); + struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent); + struct as3711_bl_supply *supply; + struct as3711_bl_data *su; + unsigned int max_brightness; + int ret; + + if (!pdata) { + dev_err(&pdev->dev, "No platform data, exiting...\n"); + return -ENODEV; + } + + if (pdev->dev.parent->of_node) { + ret = as3711_backlight_parse_dt(&pdev->dev); + if (ret < 0) { + dev_err(&pdev->dev, "DT parsing failed: %d\n", ret); + return ret; + } + } + + if (!pdata->su1_fb && !pdata->su2_fb) { + dev_err(&pdev->dev, "No framebuffer specified\n"); + return -EINVAL; + } + + /* + * Due to possible hardware damage I chose to block all modes, + * unsupported on my hardware. Anyone, wishing to use any of those modes + * will have to first review the code, then activate and test it. + */ + if (pdata->su1_fb || + pdata->su2_fbprot != AS3711_SU2_GPIO4 || + pdata->su2_feedback != AS3711_SU2_CURR_AUTO) { + dev_warn(&pdev->dev, + "Attention! An untested mode has been chosen!\n" + "Please, review the code, enable, test, and report success:-)\n"); + return -EINVAL; + } + + supply = devm_kzalloc(&pdev->dev, sizeof(*supply), GFP_KERNEL); + if (!supply) + return -ENOMEM; + + supply->as3711 = as3711; + supply->pdata = pdata; + + if (pdata->su1_fb) { + su = &supply->su1; + su->fb_name = pdata->su1_fb; + su->type = AS3711_BL_SU1; + + max_brightness = min(pdata->su1_max_uA, 31); + ret = as3711_bl_register(pdev, max_brightness, su); + if (ret < 0) + return ret; + } + + if (pdata->su2_fb) { + su = &supply->su2; + su->fb_name = pdata->su2_fb; + su->type = AS3711_BL_SU2; + + switch (pdata->su2_fbprot) { + case AS3711_SU2_GPIO2: + case AS3711_SU2_GPIO3: + case AS3711_SU2_GPIO4: + case AS3711_SU2_LX_SD4: + break; + default: + return -EINVAL; + } + + switch (pdata->su2_feedback) { + case AS3711_SU2_VOLTAGE: + max_brightness = min(pdata->su2_max_uA, 31); + break; + case AS3711_SU2_CURR1: + case AS3711_SU2_CURR2: + case AS3711_SU2_CURR3: + case AS3711_SU2_CURR_AUTO: + max_brightness = min(pdata->su2_max_uA / 150, 255); + break; + default: + return -EINVAL; + } + + ret = as3711_bl_init_su2(supply); + if (ret < 0) + return ret; + + ret = as3711_bl_register(pdev, max_brightness, su); + if (ret < 0) + return ret; + } + + platform_set_drvdata(pdev, supply); + + return 0; +} + +static struct platform_driver as3711_backlight_driver = { + .driver = { + .name = "as3711-backlight", + .owner = THIS_MODULE, + }, + .probe = as3711_backlight_probe, +}; + +module_platform_driver(as3711_backlight_driver); + +MODULE_DESCRIPTION("Backlight Driver for AS3711 PMICs"); +MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:as3711-backlight"); diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c index 505c0823a10..261b1a4ec3d 100644 --- a/drivers/video/backlight/atmel-pwm-bl.c +++ b/drivers/video/backlight/atmel-pwm-bl.c @@ -12,11 +12,11 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/fb.h> -#include <linux/clk.h> #include <linux/gpio.h> #include <linux/backlight.h> #include <linux/atmel_pwm.h> #include <linux/atmel-pwm-bl.h> +#include <linux/slab.h> struct atmel_pwm_bl { const struct atmel_pwm_bl_platform_data *pdata; @@ -26,6 +26,14 @@ struct atmel_pwm_bl { int gpio_on; }; +static void atmel_pwm_bl_set_gpio_on(struct atmel_pwm_bl *pwmbl, int on) +{ + if (!gpio_is_valid(pwmbl->gpio_on)) + return; + + gpio_set_value(pwmbl->gpio_on, on ^ pwmbl->pdata->on_active_low); +} + static int atmel_pwm_bl_set_intensity(struct backlight_device *bd) { struct atmel_pwm_bl *pwmbl = bl_get_data(bd); @@ -48,19 +56,13 @@ static int atmel_pwm_bl_set_intensity(struct backlight_device *bd) pwm_duty = pwmbl->pdata->pwm_duty_min; if (!intensity) { - if (pwmbl->gpio_on != -1) { - gpio_set_value(pwmbl->gpio_on, - 0 ^ pwmbl->pdata->on_active_low); - } + atmel_pwm_bl_set_gpio_on(pwmbl, 0); pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty); pwm_channel_disable(&pwmbl->pwmc); } else { pwm_channel_enable(&pwmbl->pwmc); pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty); - if (pwmbl->gpio_on != -1) { - gpio_set_value(pwmbl->gpio_on, - 1 ^ pwmbl->pdata->on_active_low); - } + atmel_pwm_bl_set_gpio_on(pwmbl, 1); } return 0; @@ -69,17 +71,16 @@ static int atmel_pwm_bl_set_intensity(struct backlight_device *bd) static int atmel_pwm_bl_get_intensity(struct backlight_device *bd) { struct atmel_pwm_bl *pwmbl = bl_get_data(bd); - u8 intensity; + u32 cdty; + u32 intensity; - if (pwmbl->pdata->pwm_active_low) { - intensity = pwm_channel_readl(&pwmbl->pwmc, PWM_CDTY) - - pwmbl->pdata->pwm_duty_min; - } else { - intensity = pwmbl->pdata->pwm_duty_max - - pwm_channel_readl(&pwmbl->pwmc, PWM_CDTY); - } + cdty = pwm_channel_readl(&pwmbl->pwmc, PWM_CDTY); + if (pwmbl->pdata->pwm_active_low) + intensity = cdty - pwmbl->pdata->pwm_duty_min; + else + intensity = pwmbl->pdata->pwm_duty_max - cdty; - return intensity; + return intensity & 0xffff; } static int atmel_pwm_bl_init_pwm(struct atmel_pwm_bl *pwmbl) @@ -105,71 +106,71 @@ static int atmel_pwm_bl_init_pwm(struct atmel_pwm_bl *pwmbl) pwm_channel_writel(&pwmbl->pwmc, PWM_CPRD, pwmbl->pdata->pwm_compare_max); - dev_info(&pwmbl->pdev->dev, "Atmel PWM backlight driver " - "(%lu Hz)\n", pwmbl->pwmc.mck / - pwmbl->pdata->pwm_compare_max / - (1 << prescale)); + dev_info(&pwmbl->pdev->dev, "Atmel PWM backlight driver (%lu Hz)\n", + pwmbl->pwmc.mck / pwmbl->pdata->pwm_compare_max / + (1 << prescale)); return pwm_channel_enable(&pwmbl->pwmc); } -static struct backlight_ops atmel_pwm_bl_ops = { +static const struct backlight_ops atmel_pwm_bl_ops = { .get_brightness = atmel_pwm_bl_get_intensity, .update_status = atmel_pwm_bl_set_intensity, }; static int atmel_pwm_bl_probe(struct platform_device *pdev) { + struct backlight_properties props; const struct atmel_pwm_bl_platform_data *pdata; struct backlight_device *bldev; struct atmel_pwm_bl *pwmbl; + unsigned long flags; int retval; - pwmbl = kzalloc(sizeof(struct atmel_pwm_bl), GFP_KERNEL); - if (!pwmbl) - return -ENOMEM; - - pwmbl->pdev = pdev; - - pdata = pdev->dev.platform_data; - if (!pdata) { - retval = -ENODEV; - goto err_free_mem; - } + pdata = dev_get_platdata(&pdev->dev); + if (!pdata) + return -ENODEV; if (pdata->pwm_compare_max < pdata->pwm_duty_max || pdata->pwm_duty_min > pdata->pwm_duty_max || - pdata->pwm_frequency == 0) { - retval = -EINVAL; - goto err_free_mem; - } + pdata->pwm_frequency == 0) + return -EINVAL; + + pwmbl = devm_kzalloc(&pdev->dev, sizeof(struct atmel_pwm_bl), + GFP_KERNEL); + if (!pwmbl) + return -ENOMEM; + pwmbl->pdev = pdev; pwmbl->pdata = pdata; pwmbl->gpio_on = pdata->gpio_on; retval = pwm_channel_alloc(pdata->pwm_channel, &pwmbl->pwmc); if (retval) - goto err_free_mem; + return retval; - if (pwmbl->gpio_on != -1) { - retval = gpio_request(pwmbl->gpio_on, "gpio_atmel_pwm_bl"); - if (retval) { - pwmbl->gpio_on = -1; - goto err_free_pwm; - } + if (gpio_is_valid(pwmbl->gpio_on)) { + /* Turn display off by default. */ + if (pdata->on_active_low) + flags = GPIOF_OUT_INIT_HIGH; + else + flags = GPIOF_OUT_INIT_LOW; - /* Turn display off by defatult. */ - retval = gpio_direction_output(pwmbl->gpio_on, - 0 ^ pdata->on_active_low); + retval = devm_gpio_request_one(&pdev->dev, pwmbl->gpio_on, + flags, "gpio_atmel_pwm_bl"); if (retval) - goto err_free_gpio; + goto err_free_pwm; } - bldev = backlight_device_register("atmel-pwm-bl", - &pdev->dev, pwmbl, &atmel_pwm_bl_ops); + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = pdata->pwm_duty_max - pdata->pwm_duty_min; + bldev = devm_backlight_device_register(&pdev->dev, "atmel-pwm-bl", + &pdev->dev, pwmbl, &atmel_pwm_bl_ops, + &props); if (IS_ERR(bldev)) { retval = PTR_ERR(bldev); - goto err_free_gpio; + goto err_free_pwm; } pwmbl->bldev = bldev; @@ -178,43 +179,29 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev) /* Power up the backlight by default at middle intesity. */ bldev->props.power = FB_BLANK_UNBLANK; - bldev->props.max_brightness = pdata->pwm_duty_max - pdata->pwm_duty_min; bldev->props.brightness = bldev->props.max_brightness / 2; retval = atmel_pwm_bl_init_pwm(pwmbl); if (retval) - goto err_free_bl_dev; + goto err_free_pwm; atmel_pwm_bl_set_intensity(bldev); return 0; -err_free_bl_dev: - platform_set_drvdata(pdev, NULL); - backlight_device_unregister(bldev); -err_free_gpio: - if (pwmbl->gpio_on != -1) - gpio_free(pwmbl->gpio_on); err_free_pwm: pwm_channel_free(&pwmbl->pwmc); -err_free_mem: - kfree(pwmbl); + return retval; } -static int __exit atmel_pwm_bl_remove(struct platform_device *pdev) +static int atmel_pwm_bl_remove(struct platform_device *pdev) { struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev); - if (pwmbl->gpio_on != -1) { - gpio_set_value(pwmbl->gpio_on, 0); - gpio_free(pwmbl->gpio_on); - } + atmel_pwm_bl_set_gpio_on(pwmbl, 0); pwm_channel_disable(&pwmbl->pwmc); pwm_channel_free(&pwmbl->pwmc); - backlight_device_unregister(pwmbl->bldev); - platform_set_drvdata(pdev, NULL); - kfree(pwmbl); return 0; } @@ -224,21 +211,13 @@ static struct platform_driver atmel_pwm_bl_driver = { .name = "atmel-pwm-bl", }, /* REVISIT add suspend() and resume() */ - .remove = __exit_p(atmel_pwm_bl_remove), + .probe = atmel_pwm_bl_probe, + .remove = atmel_pwm_bl_remove, }; -static int __init atmel_pwm_bl_init(void) -{ - return platform_driver_probe(&atmel_pwm_bl_driver, atmel_pwm_bl_probe); -} -module_init(atmel_pwm_bl_init); - -static void __exit atmel_pwm_bl_exit(void) -{ - platform_driver_unregister(&atmel_pwm_bl_driver); -} -module_exit(atmel_pwm_bl_exit); +module_platform_driver(atmel_pwm_bl_driver); MODULE_AUTHOR("Hans-Christian egtvedt <hans-christian.egtvedt@atmel.com>"); MODULE_DESCRIPTION("Atmel PWM backlight driver"); MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:atmel-pwm-bl"); diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index fab0bc874b5..428089009cd 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -5,6 +5,8 @@ * */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/module.h> #include <linux/init.h> #include <linux/device.h> @@ -13,22 +15,35 @@ #include <linux/ctype.h> #include <linux/err.h> #include <linux/fb.h> +#include <linux/slab.h> #ifdef CONFIG_PMAC_BACKLIGHT #include <asm/backlight.h> #endif +static struct list_head backlight_dev_list; +static struct mutex backlight_dev_list_mutex; +static struct blocking_notifier_head backlight_notifier; + +static const char *const backlight_types[] = { + [BACKLIGHT_RAW] = "raw", + [BACKLIGHT_PLATFORM] = "platform", + [BACKLIGHT_FIRMWARE] = "firmware", +}; + #if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \ defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)) /* This callback gets called when something important happens inside a * framebuffer driver. We're looking if that important event is blanking, - * and if it is, we're switching backlight power as well ... + * and if it is and necessary, we're switching backlight power as well ... */ static int fb_notifier_callback(struct notifier_block *self, unsigned long event, void *data) { struct backlight_device *bd; struct fb_event *evdata = data; + int node = evdata->info->node; + int fb_blank = 0; /* If we aren't interested in this event, skip it immediately ... */ if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK) @@ -38,9 +53,25 @@ static int fb_notifier_callback(struct notifier_block *self, mutex_lock(&bd->ops_lock); if (bd->ops) if (!bd->ops->check_fb || - bd->ops->check_fb(evdata->info)) { - bd->props.fb_blank = *(int *)evdata->data; - backlight_update_status(bd); + bd->ops->check_fb(bd, evdata->info)) { + fb_blank = *(int *)evdata->data; + if (fb_blank == FB_BLANK_UNBLANK && + !bd->fb_bl_on[node]) { + bd->fb_bl_on[node] = true; + if (!bd->use_count++) { + bd->props.state &= ~BL_CORE_FBBLANK; + bd->props.fb_blank = FB_BLANK_UNBLANK; + backlight_update_status(bd); + } + } else if (fb_blank != FB_BLANK_UNBLANK && + bd->fb_bl_on[node]) { + bd->fb_bl_on[node] = false; + if (!(--bd->use_count)) { + bd->props.state |= BL_CORE_FBBLANK; + bd->props.fb_blank = fb_blank; + backlight_update_status(bd); + } + } } mutex_unlock(&bd->ops_lock); return 0; @@ -69,31 +100,50 @@ static inline void backlight_unregister_fb(struct backlight_device *bd) } #endif /* CONFIG_FB */ -static ssize_t backlight_show_power(struct device *dev, - struct device_attribute *attr,char *buf) +static void backlight_generate_event(struct backlight_device *bd, + enum backlight_update_reason reason) +{ + char *envp[2]; + + switch (reason) { + case BACKLIGHT_UPDATE_SYSFS: + envp[0] = "SOURCE=sysfs"; + break; + case BACKLIGHT_UPDATE_HOTKEY: + envp[0] = "SOURCE=hotkey"; + break; + default: + envp[0] = "SOURCE=unknown"; + break; + } + envp[1] = NULL; + kobject_uevent_env(&bd->dev.kobj, KOBJ_CHANGE, envp); + sysfs_notify(&bd->dev.kobj, NULL, "actual_brightness"); +} + +static ssize_t bl_power_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct backlight_device *bd = to_backlight_device(dev); return sprintf(buf, "%d\n", bd->props.power); } -static ssize_t backlight_store_power(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) +static ssize_t bl_power_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { - int rc = -ENXIO; - char *endp; + int rc; struct backlight_device *bd = to_backlight_device(dev); - int power = simple_strtoul(buf, &endp, 0); - size_t size = endp - buf; + unsigned long power; - if (*endp && isspace(*endp)) - size++; - if (size != count) - return -EINVAL; + rc = kstrtoul(buf, 0, &power); + if (rc) + return rc; + rc = -ENXIO; mutex_lock(&bd->ops_lock); if (bd->ops) { - pr_debug("backlight: set power to %d\n", power); + pr_debug("set power to %lu\n", power); if (bd->props.power != power) { bd->props.power = power; backlight_update_status(bd); @@ -104,8 +154,9 @@ static ssize_t backlight_store_power(struct device *dev, return rc; } +static DEVICE_ATTR_RW(bl_power); -static ssize_t backlight_show_brightness(struct device *dev, +static ssize_t brightness_show(struct device *dev, struct device_attribute *attr, char *buf) { struct backlight_device *bd = to_backlight_device(dev); @@ -113,48 +164,57 @@ static ssize_t backlight_show_brightness(struct device *dev, return sprintf(buf, "%d\n", bd->props.brightness); } -static ssize_t backlight_store_brightness(struct device *dev, +static ssize_t brightness_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - int rc = -ENXIO; - char *endp; + int rc; struct backlight_device *bd = to_backlight_device(dev); - int brightness = simple_strtoul(buf, &endp, 0); - size_t size = endp - buf; + unsigned long brightness; + + rc = kstrtoul(buf, 0, &brightness); + if (rc) + return rc; - if (*endp && isspace(*endp)) - size++; - if (size != count) - return -EINVAL; + rc = -ENXIO; mutex_lock(&bd->ops_lock); if (bd->ops) { if (brightness > bd->props.max_brightness) rc = -EINVAL; else { - pr_debug("backlight: set brightness to %d\n", - brightness); - if (bd->props.brightness != brightness) { - bd->props.brightness = brightness; - backlight_update_status(bd); - } + pr_debug("set brightness to %lu\n", brightness); + bd->props.brightness = brightness; + backlight_update_status(bd); rc = count; } } mutex_unlock(&bd->ops_lock); + backlight_generate_event(bd, BACKLIGHT_UPDATE_SYSFS); + return rc; } +static DEVICE_ATTR_RW(brightness); + +static ssize_t type_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct backlight_device *bd = to_backlight_device(dev); + + return sprintf(buf, "%s\n", backlight_types[bd->props.type]); +} +static DEVICE_ATTR_RO(type); -static ssize_t backlight_show_max_brightness(struct device *dev, +static ssize_t max_brightness_show(struct device *dev, struct device_attribute *attr, char *buf) { struct backlight_device *bd = to_backlight_device(dev); return sprintf(buf, "%d\n", bd->props.max_brightness); } +static DEVICE_ATTR_RO(max_brightness); -static ssize_t backlight_show_actual_brightness(struct device *dev, +static ssize_t actual_brightness_show(struct device *dev, struct device_attribute *attr, char *buf) { int rc = -ENXIO; @@ -167,24 +227,77 @@ static ssize_t backlight_show_actual_brightness(struct device *dev, return rc; } +static DEVICE_ATTR_RO(actual_brightness); static struct class *backlight_class; +#ifdef CONFIG_PM_SLEEP +static int backlight_suspend(struct device *dev) +{ + struct backlight_device *bd = to_backlight_device(dev); + + mutex_lock(&bd->ops_lock); + if (bd->ops && bd->ops->options & BL_CORE_SUSPENDRESUME) { + bd->props.state |= BL_CORE_SUSPENDED; + backlight_update_status(bd); + } + mutex_unlock(&bd->ops_lock); + + return 0; +} + +static int backlight_resume(struct device *dev) +{ + struct backlight_device *bd = to_backlight_device(dev); + + mutex_lock(&bd->ops_lock); + if (bd->ops && bd->ops->options & BL_CORE_SUSPENDRESUME) { + bd->props.state &= ~BL_CORE_SUSPENDED; + backlight_update_status(bd); + } + mutex_unlock(&bd->ops_lock); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(backlight_class_dev_pm_ops, backlight_suspend, + backlight_resume); + static void bl_device_release(struct device *dev) { struct backlight_device *bd = to_backlight_device(dev); kfree(bd); } -static struct device_attribute bl_device_attributes[] = { - __ATTR(bl_power, 0644, backlight_show_power, backlight_store_power), - __ATTR(brightness, 0644, backlight_show_brightness, - backlight_store_brightness), - __ATTR(actual_brightness, 0444, backlight_show_actual_brightness, - NULL), - __ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL), - __ATTR_NULL, +static struct attribute *bl_device_attrs[] = { + &dev_attr_bl_power.attr, + &dev_attr_brightness.attr, + &dev_attr_actual_brightness.attr, + &dev_attr_max_brightness.attr, + &dev_attr_type.attr, + NULL, }; +ATTRIBUTE_GROUPS(bl_device); + +/** + * backlight_force_update - tell the backlight subsystem that hardware state + * has changed + * @bd: the backlight device to update + * + * Updates the internal state of the backlight in response to a hardware event, + * and generate a uevent to notify userspace + */ +void backlight_force_update(struct backlight_device *bd, + enum backlight_update_reason reason) +{ + mutex_lock(&bd->ops_lock); + if (bd->ops && bd->ops->get_brightness) + bd->props.brightness = bd->ops->get_brightness(bd); + mutex_unlock(&bd->ops_lock); + backlight_generate_event(bd, reason); +} +EXPORT_SYMBOL(backlight_force_update); /** * backlight_device_register - create and register a new object of @@ -200,7 +313,8 @@ static struct device_attribute bl_device_attributes[] = { * ERR_PTR() or a pointer to the newly allocated device. */ struct backlight_device *backlight_device_register(const char *name, - struct device *parent, void *devdata, struct backlight_ops *ops) + struct device *parent, void *devdata, const struct backlight_ops *ops, + const struct backlight_properties *props) { struct backlight_device *new_bd; int rc; @@ -217,12 +331,24 @@ struct backlight_device *backlight_device_register(const char *name, new_bd->dev.class = backlight_class; new_bd->dev.parent = parent; new_bd->dev.release = bl_device_release; - strlcpy(new_bd->dev.bus_id, name, BUS_ID_SIZE); + dev_set_name(&new_bd->dev, "%s", name); dev_set_drvdata(&new_bd->dev, devdata); + /* Set default properties */ + if (props) { + memcpy(&new_bd->props, props, + sizeof(struct backlight_properties)); + if (props->type <= 0 || props->type >= BACKLIGHT_TYPE_MAX) { + WARN(1, "%s: invalid backlight type", name); + new_bd->props.type = BACKLIGHT_RAW; + } + } else { + new_bd->props.type = BACKLIGHT_RAW; + } + rc = device_register(&new_bd->dev); if (rc) { - kfree(new_bd); + put_device(&new_bd->dev); return ERR_PTR(rc); } @@ -241,10 +367,35 @@ struct backlight_device *backlight_device_register(const char *name, mutex_unlock(&pmac_backlight_mutex); #endif + mutex_lock(&backlight_dev_list_mutex); + list_add(&new_bd->entry, &backlight_dev_list); + mutex_unlock(&backlight_dev_list_mutex); + + blocking_notifier_call_chain(&backlight_notifier, + BACKLIGHT_REGISTERED, new_bd); + return new_bd; } EXPORT_SYMBOL(backlight_device_register); +bool backlight_device_registered(enum backlight_type type) +{ + bool found = false; + struct backlight_device *bd; + + mutex_lock(&backlight_dev_list_mutex); + list_for_each_entry(bd, &backlight_dev_list, entry) { + if (bd->props.type == type) { + found = true; + break; + } + } + mutex_unlock(&backlight_dev_list_mutex); + + return found; +} +EXPORT_SYMBOL(backlight_device_registered); + /** * backlight_device_unregister - unregisters a backlight device object. * @bd: the backlight device object to be unregistered and freed. @@ -256,12 +407,20 @@ void backlight_device_unregister(struct backlight_device *bd) if (!bd) return; + mutex_lock(&backlight_dev_list_mutex); + list_del(&bd->entry); + mutex_unlock(&backlight_dev_list_mutex); + #ifdef CONFIG_PMAC_BACKLIGHT mutex_lock(&pmac_backlight_mutex); if (pmac_backlight == bd) pmac_backlight = NULL; mutex_unlock(&pmac_backlight_mutex); #endif + + blocking_notifier_call_chain(&backlight_notifier, + BACKLIGHT_UNREGISTERED, bd); + mutex_lock(&bd->ops_lock); bd->ops = NULL; mutex_unlock(&bd->ops_lock); @@ -271,6 +430,140 @@ void backlight_device_unregister(struct backlight_device *bd) } EXPORT_SYMBOL(backlight_device_unregister); +static void devm_backlight_device_release(struct device *dev, void *res) +{ + struct backlight_device *backlight = *(struct backlight_device **)res; + + backlight_device_unregister(backlight); +} + +static int devm_backlight_device_match(struct device *dev, void *res, + void *data) +{ + struct backlight_device **r = res; + + return *r == data; +} + +/** + * backlight_register_notifier - get notified of backlight (un)registration + * @nb: notifier block with the notifier to call on backlight (un)registration + * + * @return 0 on success, otherwise a negative error code + * + * Register a notifier to get notified when backlight devices get registered + * or unregistered. + */ +int backlight_register_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&backlight_notifier, nb); +} +EXPORT_SYMBOL(backlight_register_notifier); + +/** + * backlight_unregister_notifier - unregister a backlight notifier + * @nb: notifier block to unregister + * + * @return 0 on success, otherwise a negative error code + * + * Register a notifier to get notified when backlight devices get registered + * or unregistered. + */ +int backlight_unregister_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&backlight_notifier, nb); +} +EXPORT_SYMBOL(backlight_unregister_notifier); + +/** + * devm_backlight_device_register - resource managed backlight_device_register() + * @dev: the device to register + * @name: the name of the device + * @parent: a pointer to the parent device + * @devdata: an optional pointer to be stored for private driver use + * @ops: the backlight operations structure + * @props: the backlight properties + * + * @return a struct backlight on success, or an ERR_PTR on error + * + * Managed backlight_device_register(). The backlight_device returned + * from this function are automatically freed on driver detach. + * See backlight_device_register() for more information. + */ +struct backlight_device *devm_backlight_device_register(struct device *dev, + const char *name, struct device *parent, void *devdata, + const struct backlight_ops *ops, + const struct backlight_properties *props) +{ + struct backlight_device **ptr, *backlight; + + ptr = devres_alloc(devm_backlight_device_release, sizeof(*ptr), + GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + backlight = backlight_device_register(name, parent, devdata, ops, + props); + if (!IS_ERR(backlight)) { + *ptr = backlight; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return backlight; +} +EXPORT_SYMBOL(devm_backlight_device_register); + +/** + * devm_backlight_device_unregister - resource managed backlight_device_unregister() + * @dev: the device to unregister + * @bd: the backlight device to unregister + * + * Deallocated a backlight allocated with devm_backlight_device_register(). + * Normally this function will not need to be called and the resource management + * code will ensure that the resource is freed. + */ +void devm_backlight_device_unregister(struct device *dev, + struct backlight_device *bd) +{ + int rc; + + rc = devres_release(dev, devm_backlight_device_release, + devm_backlight_device_match, bd); + WARN_ON(rc); +} +EXPORT_SYMBOL(devm_backlight_device_unregister); + +#ifdef CONFIG_OF +static int of_parent_match(struct device *dev, const void *data) +{ + return dev->parent && dev->parent->of_node == data; +} + +/** + * of_find_backlight_by_node() - find backlight device by device-tree node + * @node: device-tree node of the backlight device + * + * Returns a pointer to the backlight device corresponding to the given DT + * node or NULL if no such backlight device exists or if the device hasn't + * been probed yet. + * + * This function obtains a reference on the backlight device and it is the + * caller's responsibility to drop the reference by calling put_device() on + * the backlight device's .dev field. + */ +struct backlight_device *of_find_backlight_by_node(struct device_node *node) +{ + struct device *dev; + + dev = class_find_device(backlight_class, NULL, node, of_parent_match); + + return dev ? to_backlight_device(dev) : NULL; +} +EXPORT_SYMBOL(of_find_backlight_by_node); +#endif + static void __exit backlight_class_exit(void) { class_destroy(backlight_class); @@ -280,12 +573,17 @@ static int __init backlight_class_init(void) { backlight_class = class_create(THIS_MODULE, "backlight"); if (IS_ERR(backlight_class)) { - printk(KERN_WARNING "Unable to create backlight class; errno = %ld\n", - PTR_ERR(backlight_class)); + pr_warn("Unable to create backlight class; errno = %ld\n", + PTR_ERR(backlight_class)); return PTR_ERR(backlight_class); } - backlight_class->dev_attrs = bl_device_attributes; + backlight_class->dev_groups = bl_device_groups; + backlight_class->pm = &backlight_class_dev_pm_ops; + INIT_LIST_HEAD(&backlight_dev_list); + mutex_init(&backlight_dev_list_mutex); + BLOCKING_INIT_NOTIFIER_HEAD(&backlight_notifier); + return 0; } diff --git a/drivers/video/backlight/bd6107.c b/drivers/video/backlight/bd6107.c new file mode 100644 index 00000000000..16dd9bc625b --- /dev/null +++ b/drivers/video/backlight/bd6107.c @@ -0,0 +1,213 @@ +/* + * ROHM Semiconductor BD6107 LED Driver + * + * Copyright (C) 2013 Ideas on board SPRL + * + * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/platform_data/bd6107.h> +#include <linux/slab.h> + +#define BD6107_PSCNT1 0x00 +#define BD6107_PSCNT1_PSCNTREG2 (1 << 2) +#define BD6107_PSCNT1_PSCNTREG1 (1 << 0) +#define BD6107_REGVSET 0x02 +#define BD6107_REGVSET_REG1VSET_2_85V (1 << 2) +#define BD6107_REGVSET_REG1VSET_2_80V (0 << 2) +#define BD6107_LEDCNT1 0x03 +#define BD6107_LEDCNT1_LEDONOFF2 (1 << 1) +#define BD6107_LEDCNT1_LEDONOFF1 (1 << 0) +#define BD6107_PORTSEL 0x04 +#define BD6107_PORTSEL_LEDM(n) (1 << (n)) +#define BD6107_RGB1CNT1 0x05 +#define BD6107_RGB1CNT2 0x06 +#define BD6107_RGB1CNT3 0x07 +#define BD6107_RGB1CNT4 0x08 +#define BD6107_RGB1CNT5 0x09 +#define BD6107_RGB1FLM 0x0a +#define BD6107_RGB2CNT1 0x0b +#define BD6107_RGB2CNT2 0x0c +#define BD6107_RGB2CNT3 0x0d +#define BD6107_RGB2CNT4 0x0e +#define BD6107_RGB2CNT5 0x0f +#define BD6107_RGB2FLM 0x10 +#define BD6107_PSCONT3 0x11 +#define BD6107_SMMONCNT 0x12 +#define BD6107_DCDCCNT 0x13 +#define BD6107_IOSEL 0x14 +#define BD6107_OUT1 0x15 +#define BD6107_OUT2 0x16 +#define BD6107_MASK1 0x17 +#define BD6107_MASK2 0x18 +#define BD6107_FACTOR1 0x19 +#define BD6107_FACTOR2 0x1a +#define BD6107_CLRFACT1 0x1b +#define BD6107_CLRFACT2 0x1c +#define BD6107_STATE1 0x1d +#define BD6107_LSIVER 0x1e +#define BD6107_GRPSEL 0x1f +#define BD6107_LEDCNT2 0x20 +#define BD6107_LEDCNT3 0x21 +#define BD6107_MCURRENT 0x22 +#define BD6107_MAINCNT1 0x23 +#define BD6107_MAINCNT2 0x24 +#define BD6107_SLOPECNT 0x25 +#define BD6107_MSLOPE 0x26 +#define BD6107_RGBSLOPE 0x27 +#define BD6107_TEST 0x29 +#define BD6107_SFTRST 0x2a +#define BD6107_SFTRSTGD 0x2b + +struct bd6107 { + struct i2c_client *client; + struct backlight_device *backlight; + struct bd6107_platform_data *pdata; +}; + +static int bd6107_write(struct bd6107 *bd, u8 reg, u8 data) +{ + return i2c_smbus_write_byte_data(bd->client, reg, data); +} + +static int bd6107_backlight_update_status(struct backlight_device *backlight) +{ + struct bd6107 *bd = bl_get_data(backlight); + int brightness = backlight->props.brightness; + + if (backlight->props.power != FB_BLANK_UNBLANK || + backlight->props.fb_blank != FB_BLANK_UNBLANK || + backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + brightness = 0; + + if (brightness) { + bd6107_write(bd, BD6107_PORTSEL, BD6107_PORTSEL_LEDM(2) | + BD6107_PORTSEL_LEDM(1) | BD6107_PORTSEL_LEDM(0)); + bd6107_write(bd, BD6107_MAINCNT1, brightness); + bd6107_write(bd, BD6107_LEDCNT1, BD6107_LEDCNT1_LEDONOFF1); + } else { + gpio_set_value(bd->pdata->reset, 0); + msleep(24); + gpio_set_value(bd->pdata->reset, 1); + } + + return 0; +} + +static int bd6107_backlight_get_brightness(struct backlight_device *backlight) +{ + return backlight->props.brightness; +} + +static int bd6107_backlight_check_fb(struct backlight_device *backlight, + struct fb_info *info) +{ + struct bd6107 *bd = bl_get_data(backlight); + + return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->dev; +} + +static const struct backlight_ops bd6107_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = bd6107_backlight_update_status, + .get_brightness = bd6107_backlight_get_brightness, + .check_fb = bd6107_backlight_check_fb, +}; + +static int bd6107_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct bd6107_platform_data *pdata = dev_get_platdata(&client->dev); + struct backlight_device *backlight; + struct backlight_properties props; + struct bd6107 *bd; + int ret; + + if (pdata == NULL || !pdata->reset) { + dev_err(&client->dev, "No reset GPIO in platform data\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_warn(&client->dev, + "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n"); + return -EIO; + } + + bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL); + if (!bd) + return -ENOMEM; + + bd->client = client; + bd->pdata = pdata; + + ret = devm_gpio_request_one(&client->dev, pdata->reset, + GPIOF_DIR_OUT | GPIOF_INIT_LOW, "reset"); + if (ret < 0) { + dev_err(&client->dev, "unable to request reset GPIO\n"); + return ret; + } + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = 128; + props.brightness = clamp_t(unsigned int, pdata->def_value, 0, + props.max_brightness); + + backlight = devm_backlight_device_register(&client->dev, + dev_name(&client->dev), + &bd->client->dev, bd, + &bd6107_backlight_ops, &props); + if (IS_ERR(backlight)) { + dev_err(&client->dev, "failed to register backlight\n"); + return PTR_ERR(backlight); + } + + backlight_update_status(backlight); + i2c_set_clientdata(client, backlight); + + return 0; +} + +static int bd6107_remove(struct i2c_client *client) +{ + struct backlight_device *backlight = i2c_get_clientdata(client); + + backlight->props.brightness = 0; + backlight_update_status(backlight); + + return 0; +} + +static const struct i2c_device_id bd6107_ids[] = { + { "bd6107", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, bd6107_ids); + +static struct i2c_driver bd6107_driver = { + .driver = { + .name = "bd6107", + }, + .probe = bd6107_probe, + .remove = bd6107_remove, + .id_table = bd6107_ids, +}; + +module_i2c_driver(bd6107_driver); + +MODULE_DESCRIPTION("Rohm BD6107 Backlight Driver"); +MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/corgi_bl.c b/drivers/video/backlight/corgi_bl.c deleted file mode 100644 index 4d4d037e3ec..00000000000 --- a/drivers/video/backlight/corgi_bl.c +++ /dev/null @@ -1,169 +0,0 @@ -/* - * Backlight Driver for Sharp Zaurus Handhelds (various models) - * - * Copyright (c) 2004-2006 Richard Purdie - * - * Based on Sharp's 2.4 Backlight Driver - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/mutex.h> -#include <linux/fb.h> -#include <linux/backlight.h> - -static int corgibl_intensity; -static struct backlight_properties corgibl_data; -static struct backlight_device *corgi_backlight_device; -static struct generic_bl_info *bl_machinfo; - -static unsigned long corgibl_flags; -#define CORGIBL_SUSPENDED 0x01 -#define CORGIBL_BATTLOW 0x02 - -static int corgibl_send_intensity(struct backlight_device *bd) -{ - int intensity = bd->props.brightness; - - if (bd->props.power != FB_BLANK_UNBLANK) - intensity = 0; - if (bd->props.fb_blank != FB_BLANK_UNBLANK) - intensity = 0; - if (corgibl_flags & CORGIBL_SUSPENDED) - intensity = 0; - if (corgibl_flags & CORGIBL_BATTLOW) - intensity &= bl_machinfo->limit_mask; - - bl_machinfo->set_bl_intensity(intensity); - - corgibl_intensity = intensity; - - if (bl_machinfo->kick_battery) - bl_machinfo->kick_battery(); - - return 0; -} - -#ifdef CONFIG_PM -static int corgibl_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct backlight_device *bd = platform_get_drvdata(pdev); - - corgibl_flags |= CORGIBL_SUSPENDED; - backlight_update_status(bd); - return 0; -} - -static int corgibl_resume(struct platform_device *pdev) -{ - struct backlight_device *bd = platform_get_drvdata(pdev); - - corgibl_flags &= ~CORGIBL_SUSPENDED; - backlight_update_status(bd); - return 0; -} -#else -#define corgibl_suspend NULL -#define corgibl_resume NULL -#endif - -static int corgibl_get_intensity(struct backlight_device *bd) -{ - return corgibl_intensity; -} - -/* - * Called when the battery is low to limit the backlight intensity. - * If limit==0 clear any limit, otherwise limit the intensity - */ -void corgibl_limit_intensity(int limit) -{ - if (limit) - corgibl_flags |= CORGIBL_BATTLOW; - else - corgibl_flags &= ~CORGIBL_BATTLOW; - backlight_update_status(corgi_backlight_device); -} -EXPORT_SYMBOL(corgibl_limit_intensity); - - -static struct backlight_ops corgibl_ops = { - .get_brightness = corgibl_get_intensity, - .update_status = corgibl_send_intensity, -}; - -static int corgibl_probe(struct platform_device *pdev) -{ - struct generic_bl_info *machinfo = pdev->dev.platform_data; - const char *name = "generic-bl"; - - bl_machinfo = machinfo; - if (!machinfo->limit_mask) - machinfo->limit_mask = -1; - - if (machinfo->name) - name = machinfo->name; - - corgi_backlight_device = backlight_device_register (name, - &pdev->dev, NULL, &corgibl_ops); - if (IS_ERR (corgi_backlight_device)) - return PTR_ERR (corgi_backlight_device); - - platform_set_drvdata(pdev, corgi_backlight_device); - - corgi_backlight_device->props.max_brightness = machinfo->max_intensity; - corgi_backlight_device->props.power = FB_BLANK_UNBLANK; - corgi_backlight_device->props.brightness = machinfo->default_intensity; - backlight_update_status(corgi_backlight_device); - - printk("Corgi Backlight Driver Initialized.\n"); - return 0; -} - -static int corgibl_remove(struct platform_device *pdev) -{ - struct backlight_device *bd = platform_get_drvdata(pdev); - - corgibl_data.power = 0; - corgibl_data.brightness = 0; - backlight_update_status(bd); - - backlight_device_unregister(bd); - - printk("Corgi Backlight Driver Unloaded\n"); - return 0; -} - -static struct platform_driver corgibl_driver = { - .probe = corgibl_probe, - .remove = corgibl_remove, - .suspend = corgibl_suspend, - .resume = corgibl_resume, - .driver = { - .name = "generic-bl", - }, -}; - -static int __init corgibl_init(void) -{ - return platform_driver_register(&corgibl_driver); -} - -static void __exit corgibl_exit(void) -{ - platform_driver_unregister(&corgibl_driver); -} - -module_init(corgibl_init); -module_exit(corgibl_exit); - -MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); -MODULE_DESCRIPTION("Corgi Backlight Driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c new file mode 100644 index 00000000000..51d18d637e2 --- /dev/null +++ b/drivers/video/backlight/corgi_lcd.c @@ -0,0 +1,612 @@ +/* + * LCD/Backlight Driver for Sharp Zaurus Handhelds (various models) + * + * Copyright (c) 2004-2006 Richard Purdie + * + * Based on Sharp's 2.4 Backlight Driver + * + * Copyright (c) 2008 Marvell International Ltd. + * Converted to SPI device based LCD/Backlight device driver + * by Eric Miao <eric.miao@marvell.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/fb.h> +#include <linux/lcd.h> +#include <linux/spi/spi.h> +#include <linux/spi/corgi_lcd.h> +#include <linux/slab.h> +#include <asm/mach/sharpsl_param.h> + +#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) + +/* Register Addresses */ +#define RESCTL_ADRS 0x00 +#define PHACTRL_ADRS 0x01 +#define DUTYCTRL_ADRS 0x02 +#define POWERREG0_ADRS 0x03 +#define POWERREG1_ADRS 0x04 +#define GPOR3_ADRS 0x05 +#define PICTRL_ADRS 0x06 +#define POLCTRL_ADRS 0x07 + +/* Register Bit Definitions */ +#define RESCTL_QVGA 0x01 +#define RESCTL_VGA 0x00 + +#define POWER1_VW_ON 0x01 /* VW Supply FET ON */ +#define POWER1_GVSS_ON 0x02 /* GVSS(-8V) Power Supply ON */ +#define POWER1_VDD_ON 0x04 /* VDD(8V),SVSS(-4V) Power Supply ON */ + +#define POWER1_VW_OFF 0x00 /* VW Supply FET OFF */ +#define POWER1_GVSS_OFF 0x00 /* GVSS(-8V) Power Supply OFF */ +#define POWER1_VDD_OFF 0x00 /* VDD(8V),SVSS(-4V) Power Supply OFF */ + +#define POWER0_COM_DCLK 0x01 /* COM Voltage DC Bias DAC Serial Data Clock */ +#define POWER0_COM_DOUT 0x02 /* COM Voltage DC Bias DAC Serial Data Out */ +#define POWER0_DAC_ON 0x04 /* DAC Power Supply ON */ +#define POWER0_COM_ON 0x08 /* COM Power Supply ON */ +#define POWER0_VCC5_ON 0x10 /* VCC5 Power Supply ON */ + +#define POWER0_DAC_OFF 0x00 /* DAC Power Supply OFF */ +#define POWER0_COM_OFF 0x00 /* COM Power Supply OFF */ +#define POWER0_VCC5_OFF 0x00 /* VCC5 Power Supply OFF */ + +#define PICTRL_INIT_STATE 0x01 +#define PICTRL_INIOFF 0x02 +#define PICTRL_POWER_DOWN 0x04 +#define PICTRL_COM_SIGNAL_OFF 0x08 +#define PICTRL_DAC_SIGNAL_OFF 0x10 + +#define POLCTRL_SYNC_POL_FALL 0x01 +#define POLCTRL_EN_POL_FALL 0x02 +#define POLCTRL_DATA_POL_FALL 0x04 +#define POLCTRL_SYNC_ACT_H 0x08 +#define POLCTRL_EN_ACT_L 0x10 + +#define POLCTRL_SYNC_POL_RISE 0x00 +#define POLCTRL_EN_POL_RISE 0x00 +#define POLCTRL_DATA_POL_RISE 0x00 +#define POLCTRL_SYNC_ACT_L 0x00 +#define POLCTRL_EN_ACT_H 0x00 + +#define PHACTRL_PHASE_MANUAL 0x01 +#define DEFAULT_PHAD_QVGA (9) +#define DEFAULT_COMADJ (125) + +struct corgi_lcd { + struct spi_device *spi_dev; + struct lcd_device *lcd_dev; + struct backlight_device *bl_dev; + + int limit_mask; + int intensity; + int power; + int mode; + char buf[2]; + + int gpio_backlight_on; + int gpio_backlight_cont; + int gpio_backlight_cont_inverted; + + void (*kick_battery)(void); +}; + +static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val); + +static struct corgi_lcd *the_corgi_lcd; +static unsigned long corgibl_flags; +#define CORGIBL_SUSPENDED 0x01 +#define CORGIBL_BATTLOW 0x02 + +/* + * This is only a pseudo I2C interface. We can't use the standard kernel + * routines as the interface is write only. We just assume the data is acked... + */ +static void lcdtg_ssp_i2c_send(struct corgi_lcd *lcd, uint8_t data) +{ + corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, data); + udelay(10); +} + +static void lcdtg_i2c_send_bit(struct corgi_lcd *lcd, uint8_t data) +{ + lcdtg_ssp_i2c_send(lcd, data); + lcdtg_ssp_i2c_send(lcd, data | POWER0_COM_DCLK); + lcdtg_ssp_i2c_send(lcd, data); +} + +static void lcdtg_i2c_send_start(struct corgi_lcd *lcd, uint8_t base) +{ + lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT); + lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK); + lcdtg_ssp_i2c_send(lcd, base); +} + +static void lcdtg_i2c_send_stop(struct corgi_lcd *lcd, uint8_t base) +{ + lcdtg_ssp_i2c_send(lcd, base); + lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK); + lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT); +} + +static void lcdtg_i2c_send_byte(struct corgi_lcd *lcd, + uint8_t base, uint8_t data) +{ + int i; + for (i = 0; i < 8; i++) { + if (data & 0x80) + lcdtg_i2c_send_bit(lcd, base | POWER0_COM_DOUT); + else + lcdtg_i2c_send_bit(lcd, base); + data <<= 1; + } +} + +static void lcdtg_i2c_wait_ack(struct corgi_lcd *lcd, uint8_t base) +{ + lcdtg_i2c_send_bit(lcd, base); +} + +static void lcdtg_set_common_voltage(struct corgi_lcd *lcd, + uint8_t base_data, uint8_t data) +{ + /* Set Common Voltage to M62332FP via I2C */ + lcdtg_i2c_send_start(lcd, base_data); + lcdtg_i2c_send_byte(lcd, base_data, 0x9c); + lcdtg_i2c_wait_ack(lcd, base_data); + lcdtg_i2c_send_byte(lcd, base_data, 0x00); + lcdtg_i2c_wait_ack(lcd, base_data); + lcdtg_i2c_send_byte(lcd, base_data, data); + lcdtg_i2c_wait_ack(lcd, base_data); + lcdtg_i2c_send_stop(lcd, base_data); +} + +static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int adrs, uint8_t data) +{ + struct spi_message msg; + struct spi_transfer xfer = { + .len = 1, + .cs_change = 1, + .tx_buf = lcd->buf, + }; + + lcd->buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f); + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + return spi_sync(lcd->spi_dev, &msg); +} + +/* Set Phase Adjust */ +static void lcdtg_set_phadadj(struct corgi_lcd *lcd, int mode) +{ + int adj; + + switch (mode) { + case CORGI_LCD_MODE_VGA: + /* Setting for VGA */ + adj = sharpsl_param.phadadj; + adj = (adj < 0) ? PHACTRL_PHASE_MANUAL : + PHACTRL_PHASE_MANUAL | ((adj & 0xf) << 1); + break; + case CORGI_LCD_MODE_QVGA: + default: + /* Setting for QVGA */ + adj = (DEFAULT_PHAD_QVGA << 1) | PHACTRL_PHASE_MANUAL; + break; + } + + corgi_ssp_lcdtg_send(lcd, PHACTRL_ADRS, adj); +} + +static void corgi_lcd_power_on(struct corgi_lcd *lcd) +{ + int comadj; + + /* Initialize Internal Logic & Port */ + corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, + PICTRL_POWER_DOWN | PICTRL_INIOFF | + PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF | + PICTRL_DAC_SIGNAL_OFF); + + corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, + POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_OFF | + POWER0_COM_OFF | POWER0_VCC5_OFF); + + corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, + POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF); + + /* VDD(+8V), SVSS(-4V) ON */ + corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, + POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON); + mdelay(3); + + /* DAC ON */ + corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, + POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | + POWER0_COM_OFF | POWER0_VCC5_OFF); + + /* INIB = H, INI = L */ + /* PICTL[0] = H , PICTL[1] = PICTL[2] = PICTL[4] = L */ + corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, + PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF); + + /* Set Common Voltage */ + comadj = sharpsl_param.comadj; + if (comadj < 0) + comadj = DEFAULT_COMADJ; + + lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF | + POWER0_VCC5_OFF, comadj); + + /* VCC5 ON, DAC ON */ + corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, + POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | + POWER0_COM_OFF | POWER0_VCC5_ON); + + /* GVSS(-8V) ON, VDD ON */ + corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, + POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON); + mdelay(2); + + /* COM SIGNAL ON (PICTL[3] = L) */ + corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_INIT_STATE); + + /* COM ON, DAC ON, VCC5_ON */ + corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, + POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON | + POWER0_COM_ON | POWER0_VCC5_ON); + + /* VW ON, GVSS ON, VDD ON */ + corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, + POWER1_VW_ON | POWER1_GVSS_ON | POWER1_VDD_ON); + + /* Signals output enable */ + corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 0); + + /* Set Phase Adjust */ + lcdtg_set_phadadj(lcd, lcd->mode); + + /* Initialize for Input Signals from ATI */ + corgi_ssp_lcdtg_send(lcd, POLCTRL_ADRS, + POLCTRL_SYNC_POL_RISE | POLCTRL_EN_POL_RISE | + POLCTRL_DATA_POL_RISE | POLCTRL_SYNC_ACT_L | + POLCTRL_EN_ACT_H); + udelay(1000); + + switch (lcd->mode) { + case CORGI_LCD_MODE_VGA: + corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA); + break; + case CORGI_LCD_MODE_QVGA: + default: + corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA); + break; + } +} + +static void corgi_lcd_power_off(struct corgi_lcd *lcd) +{ + /* 60Hz x 2 frame = 16.7msec x 2 = 33.4 msec */ + msleep(34); + + /* (1)VW OFF */ + corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, + POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON); + + /* (2)COM OFF */ + corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF); + corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, + POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON); + + /* (3)Set Common Voltage Bias 0V */ + lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF | + POWER0_VCC5_ON, 0); + + /* (4)GVSS OFF */ + corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, + POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON); + + /* (5)VCC5 OFF */ + corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, + POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF); + + /* (6)Set PDWN, INIOFF, DACOFF */ + corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, + PICTRL_INIOFF | PICTRL_DAC_SIGNAL_OFF | + PICTRL_POWER_DOWN | PICTRL_COM_SIGNAL_OFF); + + /* (7)DAC OFF */ + corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, + POWER0_DAC_OFF | POWER0_COM_OFF | POWER0_VCC5_OFF); + + /* (8)VDD OFF */ + corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS, + POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF); +} + +static int corgi_lcd_set_mode(struct lcd_device *ld, struct fb_videomode *m) +{ + struct corgi_lcd *lcd = lcd_get_data(ld); + int mode = CORGI_LCD_MODE_QVGA; + + if (m->xres == 640 || m->xres == 480) + mode = CORGI_LCD_MODE_VGA; + + if (lcd->mode == mode) + return 0; + + lcdtg_set_phadadj(lcd, mode); + + switch (mode) { + case CORGI_LCD_MODE_VGA: + corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA); + break; + case CORGI_LCD_MODE_QVGA: + default: + corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA); + break; + } + + lcd->mode = mode; + return 0; +} + +static int corgi_lcd_set_power(struct lcd_device *ld, int power) +{ + struct corgi_lcd *lcd = lcd_get_data(ld); + + if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) + corgi_lcd_power_on(lcd); + + if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) + corgi_lcd_power_off(lcd); + + lcd->power = power; + return 0; +} + +static int corgi_lcd_get_power(struct lcd_device *ld) +{ + struct corgi_lcd *lcd = lcd_get_data(ld); + + return lcd->power; +} + +static struct lcd_ops corgi_lcd_ops = { + .get_power = corgi_lcd_get_power, + .set_power = corgi_lcd_set_power, + .set_mode = corgi_lcd_set_mode, +}; + +static int corgi_bl_get_intensity(struct backlight_device *bd) +{ + struct corgi_lcd *lcd = bl_get_data(bd); + + return lcd->intensity; +} + +static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity) +{ + int cont; + + if (intensity > 0x10) + intensity += 0x10; + + corgi_ssp_lcdtg_send(lcd, DUTYCTRL_ADRS, intensity); + + /* Bit 5 via GPIO_BACKLIGHT_CONT */ + cont = !!(intensity & 0x20) ^ lcd->gpio_backlight_cont_inverted; + + if (gpio_is_valid(lcd->gpio_backlight_cont)) + gpio_set_value_cansleep(lcd->gpio_backlight_cont, cont); + + if (gpio_is_valid(lcd->gpio_backlight_on)) + gpio_set_value_cansleep(lcd->gpio_backlight_on, intensity); + + if (lcd->kick_battery) + lcd->kick_battery(); + + lcd->intensity = intensity; + return 0; +} + +static int corgi_bl_update_status(struct backlight_device *bd) +{ + struct corgi_lcd *lcd = bl_get_data(bd); + int intensity = bd->props.brightness; + + if (bd->props.power != FB_BLANK_UNBLANK) + intensity = 0; + + if (bd->props.fb_blank != FB_BLANK_UNBLANK) + intensity = 0; + + if (corgibl_flags & CORGIBL_SUSPENDED) + intensity = 0; + + if ((corgibl_flags & CORGIBL_BATTLOW) && intensity > lcd->limit_mask) + intensity = lcd->limit_mask; + + return corgi_bl_set_intensity(lcd, intensity); +} + +void corgi_lcd_limit_intensity(int limit) +{ + if (limit) + corgibl_flags |= CORGIBL_BATTLOW; + else + corgibl_flags &= ~CORGIBL_BATTLOW; + + backlight_update_status(the_corgi_lcd->bl_dev); +} +EXPORT_SYMBOL(corgi_lcd_limit_intensity); + +static const struct backlight_ops corgi_bl_ops = { + .get_brightness = corgi_bl_get_intensity, + .update_status = corgi_bl_update_status, +}; + +#ifdef CONFIG_PM_SLEEP +static int corgi_lcd_suspend(struct device *dev) +{ + struct corgi_lcd *lcd = dev_get_drvdata(dev); + + corgibl_flags |= CORGIBL_SUSPENDED; + corgi_bl_set_intensity(lcd, 0); + corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN); + return 0; +} + +static int corgi_lcd_resume(struct device *dev) +{ + struct corgi_lcd *lcd = dev_get_drvdata(dev); + + corgibl_flags &= ~CORGIBL_SUSPENDED; + corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK); + backlight_update_status(lcd->bl_dev); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(corgi_lcd_pm_ops, corgi_lcd_suspend, corgi_lcd_resume); + +static int setup_gpio_backlight(struct corgi_lcd *lcd, + struct corgi_lcd_platform_data *pdata) +{ + struct spi_device *spi = lcd->spi_dev; + int err; + + lcd->gpio_backlight_on = -1; + lcd->gpio_backlight_cont = -1; + + if (gpio_is_valid(pdata->gpio_backlight_on)) { + err = devm_gpio_request(&spi->dev, pdata->gpio_backlight_on, + "BL_ON"); + if (err) { + dev_err(&spi->dev, + "failed to request GPIO%d for backlight_on\n", + pdata->gpio_backlight_on); + return err; + } + + lcd->gpio_backlight_on = pdata->gpio_backlight_on; + gpio_direction_output(lcd->gpio_backlight_on, 0); + } + + if (gpio_is_valid(pdata->gpio_backlight_cont)) { + err = devm_gpio_request(&spi->dev, pdata->gpio_backlight_cont, + "BL_CONT"); + if (err) { + dev_err(&spi->dev, + "failed to request GPIO%d for backlight_cont\n", + pdata->gpio_backlight_cont); + return err; + } + + lcd->gpio_backlight_cont = pdata->gpio_backlight_cont; + + /* spitz and akita use both GPIOs for backlight, and + * have inverted polarity of GPIO_BACKLIGHT_CONT + */ + if (gpio_is_valid(lcd->gpio_backlight_on)) { + lcd->gpio_backlight_cont_inverted = 1; + gpio_direction_output(lcd->gpio_backlight_cont, 1); + } else { + lcd->gpio_backlight_cont_inverted = 0; + gpio_direction_output(lcd->gpio_backlight_cont, 0); + } + } + return 0; +} + +static int corgi_lcd_probe(struct spi_device *spi) +{ + struct backlight_properties props; + struct corgi_lcd_platform_data *pdata = dev_get_platdata(&spi->dev); + struct corgi_lcd *lcd; + int ret = 0; + + if (pdata == NULL) { + dev_err(&spi->dev, "platform data not available\n"); + return -EINVAL; + } + + lcd = devm_kzalloc(&spi->dev, sizeof(struct corgi_lcd), GFP_KERNEL); + if (!lcd) + return -ENOMEM; + + lcd->spi_dev = spi; + + lcd->lcd_dev = devm_lcd_device_register(&spi->dev, "corgi_lcd", + &spi->dev, lcd, &corgi_lcd_ops); + if (IS_ERR(lcd->lcd_dev)) + return PTR_ERR(lcd->lcd_dev); + + lcd->power = FB_BLANK_POWERDOWN; + lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = pdata->max_intensity; + lcd->bl_dev = devm_backlight_device_register(&spi->dev, "corgi_bl", + &spi->dev, lcd, &corgi_bl_ops, + &props); + if (IS_ERR(lcd->bl_dev)) + return PTR_ERR(lcd->bl_dev); + + lcd->bl_dev->props.brightness = pdata->default_intensity; + lcd->bl_dev->props.power = FB_BLANK_UNBLANK; + + ret = setup_gpio_backlight(lcd, pdata); + if (ret) + return ret; + + lcd->kick_battery = pdata->kick_battery; + + spi_set_drvdata(spi, lcd); + corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK); + backlight_update_status(lcd->bl_dev); + + lcd->limit_mask = pdata->limit_mask; + the_corgi_lcd = lcd; + return 0; +} + +static int corgi_lcd_remove(struct spi_device *spi) +{ + struct corgi_lcd *lcd = spi_get_drvdata(spi); + + lcd->bl_dev->props.power = FB_BLANK_UNBLANK; + lcd->bl_dev->props.brightness = 0; + backlight_update_status(lcd->bl_dev); + corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN); + return 0; +} + +static struct spi_driver corgi_lcd_driver = { + .driver = { + .name = "corgi-lcd", + .owner = THIS_MODULE, + .pm = &corgi_lcd_pm_ops, + }, + .probe = corgi_lcd_probe, + .remove = corgi_lcd_remove, +}; + +module_spi_driver(corgi_lcd_driver); + +MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00"); +MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:corgi-lcd"); diff --git a/drivers/video/backlight/cr_bllcd.c b/drivers/video/backlight/cr_bllcd.c index 26add889860..f3fed9ef745 100644 --- a/drivers/video/backlight/cr_bllcd.c +++ b/drivers/video/backlight/cr_bllcd.c @@ -27,6 +27,8 @@ * Alan Hourihane <alanh-at-tungstengraphics-dot-com> */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> @@ -36,6 +38,7 @@ #include <linux/backlight.h> #include <linux/lcd.h> #include <linux/pci.h> +#include <linux/slab.h> /* The LVDS- and panel power controls sits on the * GPIO port of the ISA bridge. @@ -108,7 +111,7 @@ static int cr_backlight_get_intensity(struct backlight_device *bd) return intensity; } -static struct backlight_ops cr_backlight_ops = { +static const struct backlight_ops cr_backlight_ops = { .get_brightness = cr_backlight_get_intensity, .update_status = cr_backlight_set_intensity, }; @@ -170,6 +173,7 @@ static struct lcd_ops cr_lcd_ops = { static int cr_backlight_probe(struct platform_device *pdev) { + struct backlight_properties props; struct backlight_device *bdp; struct lcd_device *ldp; struct cr_panel *crp; @@ -178,40 +182,40 @@ static int cr_backlight_probe(struct platform_device *pdev) lpc_dev = pci_get_device(PCI_VENDOR_ID_INTEL, CRVML_DEVICE_LPC, NULL); if (!lpc_dev) { - printk("INTEL CARILLO RANCH LPC not found.\n"); + pr_err("INTEL CARILLO RANCH LPC not found.\n"); return -ENODEV; } pci_read_config_byte(lpc_dev, CRVML_REG_GPIOEN, &dev_en); if (!(dev_en & CRVML_GPIOEN_BIT)) { - printk(KERN_ERR - "Carillo Ranch GPIO device was not enabled.\n"); + pr_err("Carillo Ranch GPIO device was not enabled.\n"); pci_dev_put(lpc_dev); return -ENODEV; } - bdp = backlight_device_register("cr-backlight", - &pdev->dev, NULL, &cr_backlight_ops); + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + bdp = devm_backlight_device_register(&pdev->dev, "cr-backlight", + &pdev->dev, NULL, &cr_backlight_ops, + &props); if (IS_ERR(bdp)) { pci_dev_put(lpc_dev); return PTR_ERR(bdp); } - ldp = lcd_device_register("cr-lcd", &pdev->dev, NULL, &cr_lcd_ops); + ldp = devm_lcd_device_register(&pdev->dev, "cr-lcd", &pdev->dev, NULL, + &cr_lcd_ops); if (IS_ERR(ldp)) { - backlight_device_unregister(bdp); pci_dev_put(lpc_dev); - return PTR_ERR(bdp); + return PTR_ERR(ldp); } pci_read_config_dword(lpc_dev, CRVML_REG_GPIOBAR, &gpio_bar); gpio_bar &= ~0x3F; - crp = kzalloc(sizeof(*crp), GFP_KERNEL); + crp = devm_kzalloc(&pdev->dev, sizeof(*crp), GFP_KERNEL); if (!crp) { - lcd_device_unregister(ldp); - backlight_device_unregister(bdp); pci_dev_put(lpc_dev); return -ENOMEM; } @@ -220,9 +224,7 @@ static int cr_backlight_probe(struct platform_device *pdev) crp->cr_lcd_device = ldp; crp->cr_backlight_device->props.power = FB_BLANK_UNBLANK; crp->cr_backlight_device->props.brightness = 0; - crp->cr_backlight_device->props.max_brightness = 0; cr_backlight_set_intensity(crp->cr_backlight_device); - cr_lcd_set_power(crp->cr_lcd_device, FB_BLANK_UNBLANK); platform_set_drvdata(pdev, crp); @@ -238,8 +240,6 @@ static int cr_backlight_remove(struct platform_device *pdev) crp->cr_backlight_device->props.max_brightness = 0; cr_backlight_set_intensity(crp->cr_backlight_device); cr_lcd_set_power(crp->cr_lcd_device, FB_BLANK_POWERDOWN); - backlight_device_unregister(crp->cr_backlight_device); - lcd_device_unregister(crp->cr_lcd_device); pci_dev_put(lpc_dev); return 0; @@ -259,22 +259,18 @@ static int __init cr_backlight_init(void) { int ret = platform_driver_register(&cr_backlight_driver); - if (!ret) { - crp = platform_device_alloc("cr_backlight", -1); - if (!crp) - return -ENOMEM; + if (ret) + return ret; - ret = platform_device_add(crp); - - if (ret) { - platform_device_put(crp); - platform_driver_unregister(&cr_backlight_driver); - } + crp = platform_device_register_simple("cr_backlight", -1, NULL, 0); + if (IS_ERR(crp)) { + platform_driver_unregister(&cr_backlight_driver); + return PTR_ERR(crp); } - printk("Carillo Ranch Backlight Driver Initialized.\n"); + pr_info("Carillo Ranch Backlight Driver Initialized.\n"); - return ret; + return 0; } static void __exit cr_backlight_exit(void) diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c new file mode 100644 index 00000000000..12c5d840c59 --- /dev/null +++ b/drivers/video/backlight/da903x_bl.c @@ -0,0 +1,176 @@ +/* + * Backlight driver for Dialog Semiconductor DA9030/DA9034 + * + * Copyright (C) 2008 Compulab, Ltd. + * Mike Rapoport <mike@compulab.co.il> + * + * Copyright (C) 2006-2008 Marvell International Ltd. + * Eric Miao <eric.miao@marvell.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/mfd/da903x.h> +#include <linux/slab.h> +#include <linux/module.h> + +#define DA9030_WLED_CONTROL 0x25 +#define DA9030_WLED_CP_EN (1 << 6) +#define DA9030_WLED_TRIM(x) ((x) & 0x7) + +#define DA9034_WLED_CONTROL1 0x3C +#define DA9034_WLED_CONTROL2 0x3D +#define DA9034_WLED_ISET(x) ((x) & 0x1f) + +#define DA9034_WLED_BOOST_EN (1 << 5) + +#define DA9030_MAX_BRIGHTNESS 7 +#define DA9034_MAX_BRIGHTNESS 0x7f + +struct da903x_backlight_data { + struct device *da903x_dev; + int id; + int current_brightness; +}; + +static int da903x_backlight_set(struct backlight_device *bl, int brightness) +{ + struct da903x_backlight_data *data = bl_get_data(bl); + struct device *dev = data->da903x_dev; + uint8_t val; + int ret = 0; + + switch (data->id) { + case DA9034_ID_WLED: + ret = da903x_update(dev, DA9034_WLED_CONTROL1, + brightness, 0x7f); + if (ret) + return ret; + + if (data->current_brightness && brightness == 0) + ret = da903x_clr_bits(dev, + DA9034_WLED_CONTROL2, + DA9034_WLED_BOOST_EN); + + if (data->current_brightness == 0 && brightness) + ret = da903x_set_bits(dev, + DA9034_WLED_CONTROL2, + DA9034_WLED_BOOST_EN); + break; + case DA9030_ID_WLED: + val = DA9030_WLED_TRIM(brightness); + val |= brightness ? DA9030_WLED_CP_EN : 0; + ret = da903x_write(dev, DA9030_WLED_CONTROL, val); + break; + } + + if (ret) + return ret; + + data->current_brightness = brightness; + return 0; +} + +static int da903x_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.state & BL_CORE_SUSPENDED) + brightness = 0; + + return da903x_backlight_set(bl, brightness); +} + +static int da903x_backlight_get_brightness(struct backlight_device *bl) +{ + struct da903x_backlight_data *data = bl_get_data(bl); + + return data->current_brightness; +} + +static const struct backlight_ops da903x_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = da903x_backlight_update_status, + .get_brightness = da903x_backlight_get_brightness, +}; + +static int da903x_backlight_probe(struct platform_device *pdev) +{ + struct da9034_backlight_pdata *pdata = dev_get_platdata(&pdev->dev); + struct da903x_backlight_data *data; + struct backlight_device *bl; + struct backlight_properties props; + int max_brightness; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + switch (pdev->id) { + case DA9030_ID_WLED: + max_brightness = DA9030_MAX_BRIGHTNESS; + break; + case DA9034_ID_WLED: + max_brightness = DA9034_MAX_BRIGHTNESS; + break; + default: + dev_err(&pdev->dev, "invalid backlight device ID(%d)\n", + pdev->id); + return -EINVAL; + } + + data->id = pdev->id; + data->da903x_dev = pdev->dev.parent; + data->current_brightness = 0; + + /* adjust the WLED output current */ + if (pdata) + da903x_write(data->da903x_dev, DA9034_WLED_CONTROL2, + DA9034_WLED_ISET(pdata->output_current)); + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = max_brightness; + bl = devm_backlight_device_register(&pdev->dev, pdev->name, + data->da903x_dev, data, + &da903x_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.brightness = max_brightness; + + platform_set_drvdata(pdev, bl); + backlight_update_status(bl); + return 0; +} + +static struct platform_driver da903x_backlight_driver = { + .driver = { + .name = "da903x-backlight", + .owner = THIS_MODULE, + }, + .probe = da903x_backlight_probe, +}; + +module_platform_driver(da903x_backlight_driver); + +MODULE_DESCRIPTION("Backlight Driver for Dialog Semiconductor DA9030/DA9034"); +MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); +MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da903x-backlight"); diff --git a/drivers/video/backlight/da9052_bl.c b/drivers/video/backlight/da9052_bl.c new file mode 100644 index 00000000000..20d55becaa7 --- /dev/null +++ b/drivers/video/backlight/da9052_bl.c @@ -0,0 +1,185 @@ +/* + * Backlight Driver for Dialog DA9052 PMICs + * + * Copyright(c) 2012 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen <dchen@diasemi.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <linux/mfd/da9052/da9052.h> +#include <linux/mfd/da9052/reg.h> + +#define DA9052_MAX_BRIGHTNESS 0xFF + +enum { + DA9052_WLEDS_OFF, + DA9052_WLEDS_ON, +}; + +enum { + DA9052_TYPE_WLED1, + DA9052_TYPE_WLED2, + DA9052_TYPE_WLED3, +}; + +static const unsigned char wled_bank[] = { + DA9052_LED1_CONF_REG, + DA9052_LED2_CONF_REG, + DA9052_LED3_CONF_REG, +}; + +struct da9052_bl { + struct da9052 *da9052; + uint brightness; + uint state; + uint led_reg; +}; + +static int da9052_adjust_wled_brightness(struct da9052_bl *wleds) +{ + unsigned char boost_en; + unsigned char i_sink; + int ret; + + boost_en = 0x3F; + i_sink = 0xFF; + if (wleds->state == DA9052_WLEDS_OFF) { + boost_en = 0x00; + i_sink = 0x00; + } + + ret = da9052_reg_write(wleds->da9052, DA9052_BOOST_REG, boost_en); + if (ret < 0) + return ret; + + ret = da9052_reg_write(wleds->da9052, DA9052_LED_CONT_REG, i_sink); + if (ret < 0) + return ret; + + ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], 0x0); + if (ret < 0) + return ret; + + usleep_range(10000, 11000); + + if (wleds->brightness) { + ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], + wleds->brightness); + if (ret < 0) + return ret; + } + + return 0; +} + +static int da9052_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + struct da9052_bl *wleds = bl_get_data(bl); + + wleds->brightness = brightness; + wleds->state = DA9052_WLEDS_ON; + + return da9052_adjust_wled_brightness(wleds); +} + +static int da9052_backlight_get_brightness(struct backlight_device *bl) +{ + struct da9052_bl *wleds = bl_get_data(bl); + + return wleds->brightness; +} + +static const struct backlight_ops da9052_backlight_ops = { + .update_status = da9052_backlight_update_status, + .get_brightness = da9052_backlight_get_brightness, +}; + +static int da9052_backlight_probe(struct platform_device *pdev) +{ + struct backlight_device *bl; + struct backlight_properties props; + struct da9052_bl *wleds; + + wleds = devm_kzalloc(&pdev->dev, sizeof(struct da9052_bl), GFP_KERNEL); + if (!wleds) + return -ENOMEM; + + wleds->da9052 = dev_get_drvdata(pdev->dev.parent); + wleds->brightness = 0; + wleds->led_reg = platform_get_device_id(pdev)->driver_data; + wleds->state = DA9052_WLEDS_OFF; + + props.type = BACKLIGHT_RAW; + props.max_brightness = DA9052_MAX_BRIGHTNESS; + + bl = devm_backlight_device_register(&pdev->dev, pdev->name, + wleds->da9052->dev, wleds, + &da9052_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "Failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.max_brightness = DA9052_MAX_BRIGHTNESS; + bl->props.brightness = 0; + platform_set_drvdata(pdev, bl); + + return da9052_adjust_wled_brightness(wleds); +} + +static int da9052_backlight_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct da9052_bl *wleds = bl_get_data(bl); + + wleds->brightness = 0; + wleds->state = DA9052_WLEDS_OFF; + da9052_adjust_wled_brightness(wleds); + + return 0; +} + +static struct platform_device_id da9052_wled_ids[] = { + { + .name = "da9052-wled1", + .driver_data = DA9052_TYPE_WLED1, + }, + { + .name = "da9052-wled2", + .driver_data = DA9052_TYPE_WLED2, + }, + { + .name = "da9052-wled3", + .driver_data = DA9052_TYPE_WLED3, + }, +}; + +static struct platform_driver da9052_wled_driver = { + .probe = da9052_backlight_probe, + .remove = da9052_backlight_remove, + .id_table = da9052_wled_ids, + .driver = { + .name = "da9052-wled", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9052_wled_driver); + +MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); +MODULE_DESCRIPTION("Backlight driver for DA9052 PMIC"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-backlight"); diff --git a/drivers/video/backlight/ep93xx_bl.c b/drivers/video/backlight/ep93xx_bl.c new file mode 100644 index 00000000000..0d1f633c648 --- /dev/null +++ b/drivers/video/backlight/ep93xx_bl.c @@ -0,0 +1,142 @@ +/* + * Driver for the Cirrus EP93xx lcd backlight + * + * Copyright (c) 2010 H Hartley Sweeten <hsweeten@visionengravers.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This driver controls the pulse width modulated brightness control output, + * BRIGHT, on the Cirrus EP9307, EP9312, and EP9315 processors. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/fb.h> +#include <linux/backlight.h> + +#define EP93XX_MAX_COUNT 255 +#define EP93XX_MAX_BRIGHT 255 +#define EP93XX_DEF_BRIGHT 128 + +struct ep93xxbl { + void __iomem *mmio; + int brightness; +}; + +static int ep93xxbl_set(struct backlight_device *bl, int brightness) +{ + struct ep93xxbl *ep93xxbl = bl_get_data(bl); + + writel((brightness << 8) | EP93XX_MAX_COUNT, ep93xxbl->mmio); + + ep93xxbl->brightness = brightness; + + return 0; +} + +static int ep93xxbl_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK || + bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + return ep93xxbl_set(bl, brightness); +} + +static int ep93xxbl_get_brightness(struct backlight_device *bl) +{ + struct ep93xxbl *ep93xxbl = bl_get_data(bl); + + return ep93xxbl->brightness; +} + +static const struct backlight_ops ep93xxbl_ops = { + .update_status = ep93xxbl_update_status, + .get_brightness = ep93xxbl_get_brightness, +}; + +static int ep93xxbl_probe(struct platform_device *dev) +{ + struct ep93xxbl *ep93xxbl; + struct backlight_device *bl; + struct backlight_properties props; + struct resource *res; + + ep93xxbl = devm_kzalloc(&dev->dev, sizeof(*ep93xxbl), GFP_KERNEL); + if (!ep93xxbl) + return -ENOMEM; + + res = platform_get_resource(dev, IORESOURCE_MEM, 0); + if (!res) + return -ENXIO; + + /* + * FIXME - We don't do a request_mem_region here because we are + * sharing the register space with the framebuffer driver (see + * drivers/video/ep93xx-fb.c) and doing so will cause the second + * loaded driver to return -EBUSY. + * + * NOTE: No locking is required; the framebuffer does not touch + * this register. + */ + ep93xxbl->mmio = devm_ioremap(&dev->dev, res->start, + resource_size(res)); + if (!ep93xxbl->mmio) + return -ENXIO; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = EP93XX_MAX_BRIGHT; + bl = devm_backlight_device_register(&dev->dev, dev->name, &dev->dev, + ep93xxbl, &ep93xxbl_ops, &props); + if (IS_ERR(bl)) + return PTR_ERR(bl); + + bl->props.brightness = EP93XX_DEF_BRIGHT; + + platform_set_drvdata(dev, bl); + + ep93xxbl_update_status(bl); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int ep93xxbl_suspend(struct device *dev) +{ + struct backlight_device *bl = dev_get_drvdata(dev); + + return ep93xxbl_set(bl, 0); +} + +static int ep93xxbl_resume(struct device *dev) +{ + struct backlight_device *bl = dev_get_drvdata(dev); + + backlight_update_status(bl); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(ep93xxbl_pm_ops, ep93xxbl_suspend, ep93xxbl_resume); + +static struct platform_driver ep93xxbl_driver = { + .driver = { + .name = "ep93xx-bl", + .owner = THIS_MODULE, + .pm = &ep93xxbl_pm_ops, + }, + .probe = ep93xxbl_probe, +}; + +module_platform_driver(ep93xxbl_driver); + +MODULE_DESCRIPTION("EP93xx Backlight Driver"); +MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ep93xx-bl"); diff --git a/drivers/video/backlight/generic_bl.c b/drivers/video/backlight/generic_bl.c new file mode 100644 index 00000000000..5d8d65200db --- /dev/null +++ b/drivers/video/backlight/generic_bl.c @@ -0,0 +1,137 @@ +/* + * Generic Backlight Driver + * + * Copyright (c) 2004-2008 Richard Purdie + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/mutex.h> +#include <linux/fb.h> +#include <linux/backlight.h> + +static int genericbl_intensity; +static struct backlight_device *generic_backlight_device; +static struct generic_bl_info *bl_machinfo; + +/* Flag to signal when the battery is low */ +#define GENERICBL_BATTLOW BL_CORE_DRIVER1 + +static int genericbl_send_intensity(struct backlight_device *bd) +{ + int intensity = bd->props.brightness; + + if (bd->props.power != FB_BLANK_UNBLANK) + intensity = 0; + if (bd->props.state & BL_CORE_FBBLANK) + intensity = 0; + if (bd->props.state & BL_CORE_SUSPENDED) + intensity = 0; + if (bd->props.state & GENERICBL_BATTLOW) + intensity &= bl_machinfo->limit_mask; + + bl_machinfo->set_bl_intensity(intensity); + + genericbl_intensity = intensity; + + if (bl_machinfo->kick_battery) + bl_machinfo->kick_battery(); + + return 0; +} + +static int genericbl_get_intensity(struct backlight_device *bd) +{ + return genericbl_intensity; +} + +/* + * Called when the battery is low to limit the backlight intensity. + * If limit==0 clear any limit, otherwise limit the intensity + */ +void genericbl_limit_intensity(int limit) +{ + struct backlight_device *bd = generic_backlight_device; + + mutex_lock(&bd->ops_lock); + if (limit) + bd->props.state |= GENERICBL_BATTLOW; + else + bd->props.state &= ~GENERICBL_BATTLOW; + backlight_update_status(generic_backlight_device); + mutex_unlock(&bd->ops_lock); +} +EXPORT_SYMBOL(genericbl_limit_intensity); + +static const struct backlight_ops genericbl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .get_brightness = genericbl_get_intensity, + .update_status = genericbl_send_intensity, +}; + +static int genericbl_probe(struct platform_device *pdev) +{ + struct backlight_properties props; + struct generic_bl_info *machinfo = dev_get_platdata(&pdev->dev); + const char *name = "generic-bl"; + struct backlight_device *bd; + + bl_machinfo = machinfo; + if (!machinfo->limit_mask) + machinfo->limit_mask = -1; + + if (machinfo->name) + name = machinfo->name; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = machinfo->max_intensity; + bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev, + NULL, &genericbl_ops, &props); + if (IS_ERR(bd)) + return PTR_ERR(bd); + + platform_set_drvdata(pdev, bd); + + bd->props.power = FB_BLANK_UNBLANK; + bd->props.brightness = machinfo->default_intensity; + backlight_update_status(bd); + + generic_backlight_device = bd; + + dev_info(&pdev->dev, "Generic Backlight Driver Initialized.\n"); + return 0; +} + +static int genericbl_remove(struct platform_device *pdev) +{ + struct backlight_device *bd = platform_get_drvdata(pdev); + + bd->props.power = 0; + bd->props.brightness = 0; + backlight_update_status(bd); + + dev_info(&pdev->dev, "Generic Backlight Driver Unloaded\n"); + return 0; +} + +static struct platform_driver genericbl_driver = { + .probe = genericbl_probe, + .remove = genericbl_remove, + .driver = { + .name = "generic-bl", + }, +}; + +module_platform_driver(genericbl_driver); + +MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); +MODULE_DESCRIPTION("Generic Backlight Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c new file mode 100644 index 00000000000..1cea68848f1 --- /dev/null +++ b/drivers/video/backlight/gpio_backlight.c @@ -0,0 +1,171 @@ +/* + * gpio_backlight.c - Simple GPIO-controlled backlight + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/platform_data/gpio_backlight.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +struct gpio_backlight { + struct device *dev; + struct device *fbdev; + + int gpio; + int active; + int def_value; +}; + +static int gpio_backlight_update_status(struct backlight_device *bl) +{ + struct gpio_backlight *gbl = bl_get_data(bl); + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK || + bl->props.fb_blank != FB_BLANK_UNBLANK || + bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + brightness = 0; + + gpio_set_value_cansleep(gbl->gpio, + brightness ? gbl->active : !gbl->active); + + return 0; +} + +static int gpio_backlight_get_brightness(struct backlight_device *bl) +{ + return bl->props.brightness; +} + +static int gpio_backlight_check_fb(struct backlight_device *bl, + struct fb_info *info) +{ + struct gpio_backlight *gbl = bl_get_data(bl); + + return gbl->fbdev == NULL || gbl->fbdev == info->dev; +} + +static const struct backlight_ops gpio_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = gpio_backlight_update_status, + .get_brightness = gpio_backlight_get_brightness, + .check_fb = gpio_backlight_check_fb, +}; + +static int gpio_backlight_probe_dt(struct platform_device *pdev, + struct gpio_backlight *gbl) +{ + struct device_node *np = pdev->dev.of_node; + enum of_gpio_flags gpio_flags; + + gbl->gpio = of_get_gpio_flags(np, 0, &gpio_flags); + + if (!gpio_is_valid(gbl->gpio)) { + if (gbl->gpio != -EPROBE_DEFER) { + dev_err(&pdev->dev, + "Error: The gpios parameter is missing or invalid.\n"); + } + return gbl->gpio; + } + + gbl->active = (gpio_flags & OF_GPIO_ACTIVE_LOW) ? 0 : 1; + + gbl->def_value = of_property_read_bool(np, "default-on"); + + return 0; +} + +static int gpio_backlight_probe(struct platform_device *pdev) +{ + struct gpio_backlight_platform_data *pdata = + dev_get_platdata(&pdev->dev); + struct backlight_properties props; + struct backlight_device *bl; + struct gpio_backlight *gbl; + struct device_node *np = pdev->dev.of_node; + int ret; + + if (!pdata && !np) { + dev_err(&pdev->dev, + "failed to find platform data or device tree node.\n"); + return -ENODEV; + } + + gbl = devm_kzalloc(&pdev->dev, sizeof(*gbl), GFP_KERNEL); + if (gbl == NULL) + return -ENOMEM; + + gbl->dev = &pdev->dev; + + if (np) { + ret = gpio_backlight_probe_dt(pdev, gbl); + if (ret) + return ret; + } else { + gbl->fbdev = pdata->fbdev; + gbl->gpio = pdata->gpio; + gbl->active = pdata->active_low ? 0 : 1; + gbl->def_value = pdata->def_value; + } + + ret = devm_gpio_request_one(gbl->dev, gbl->gpio, GPIOF_DIR_OUT | + (gbl->active ? GPIOF_INIT_LOW + : GPIOF_INIT_HIGH), + pdata ? pdata->name : "backlight"); + if (ret < 0) { + dev_err(&pdev->dev, "unable to request GPIO\n"); + return ret; + } + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = 1; + bl = devm_backlight_device_register(&pdev->dev, dev_name(&pdev->dev), + &pdev->dev, gbl, &gpio_backlight_ops, + &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.brightness = gbl->def_value; + backlight_update_status(bl); + + platform_set_drvdata(pdev, bl); + return 0; +} + +#ifdef CONFIG_OF +static struct of_device_id gpio_backlight_of_match[] = { + { .compatible = "gpio-backlight" }, + { /* sentinel */ } +}; +#endif + +static struct platform_driver gpio_backlight_driver = { + .driver = { + .name = "gpio-backlight", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(gpio_backlight_of_match), + }, + .probe = gpio_backlight_probe, +}; + +module_platform_driver(gpio_backlight_driver); + +MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); +MODULE_DESCRIPTION("GPIO-based Backlight Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:gpio-backlight"); diff --git a/drivers/video/backlight/hp680_bl.c b/drivers/video/backlight/hp680_bl.c index fbea2bd129c..8ea42b8d9bc 100644 --- a/drivers/video/backlight/hp680_bl.c +++ b/drivers/video/backlight/hp680_bl.c @@ -18,15 +18,15 @@ #include <linux/fb.h> #include <linux/backlight.h> -#include <asm/cpu/dac.h> -#include <asm/hp6xx.h> +#include <cpu/dac.h> +#include <mach/hp6xx.h> #include <asm/hd64461.h> #define HP680_MAX_INTENSITY 255 #define HP680_DEFAULT_INTENSITY 10 static int hp680bl_suspended; -static int current_intensity = 0; +static int current_intensity; static DEFINE_SPINLOCK(bl_lock); static void hp680bl_send_intensity(struct backlight_device *bd) @@ -64,29 +64,28 @@ static void hp680bl_send_intensity(struct backlight_device *bd) } -#ifdef CONFIG_PM -static int hp680bl_suspend(struct platform_device *pdev, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int hp680bl_suspend(struct device *dev) { - struct backlight_device *bd = platform_get_drvdata(pdev); + struct backlight_device *bd = dev_get_drvdata(dev); hp680bl_suspended = 1; hp680bl_send_intensity(bd); return 0; } -static int hp680bl_resume(struct platform_device *pdev) +static int hp680bl_resume(struct device *dev) { - struct backlight_device *bd = platform_get_drvdata(pdev); + struct backlight_device *bd = dev_get_drvdata(dev); hp680bl_suspended = 0; hp680bl_send_intensity(bd); return 0; } -#else -#define hp680bl_suspend NULL -#define hp680bl_resume NULL #endif +static SIMPLE_DEV_PM_OPS(hp680bl_pm_ops, hp680bl_suspend, hp680bl_resume); + static int hp680bl_set_intensity(struct backlight_device *bd) { hp680bl_send_intensity(bd); @@ -98,23 +97,26 @@ static int hp680bl_get_intensity(struct backlight_device *bd) return current_intensity; } -static struct backlight_ops hp680bl_ops = { +static const struct backlight_ops hp680bl_ops = { .get_brightness = hp680bl_get_intensity, .update_status = hp680bl_set_intensity, }; -static int __init hp680bl_probe(struct platform_device *pdev) +static int hp680bl_probe(struct platform_device *pdev) { + struct backlight_properties props; struct backlight_device *bd; - bd = backlight_device_register ("hp680-bl", &pdev->dev, NULL, - &hp680bl_ops); + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = HP680_MAX_INTENSITY; + bd = devm_backlight_device_register(&pdev->dev, "hp680-bl", &pdev->dev, + NULL, &hp680bl_ops, &props); if (IS_ERR(bd)) return PTR_ERR(bd); platform_set_drvdata(pdev, bd); - bd->props.max_brightness = HP680_MAX_INTENSITY; bd->props.brightness = HP680_DEFAULT_INTENSITY; hp680bl_send_intensity(bd); @@ -129,18 +131,15 @@ static int hp680bl_remove(struct platform_device *pdev) bd->props.power = 0; hp680bl_send_intensity(bd); - backlight_device_unregister(bd); - return 0; } static struct platform_driver hp680bl_driver = { .probe = hp680bl_probe, .remove = hp680bl_remove, - .suspend = hp680bl_suspend, - .resume = hp680bl_resume, .driver = { .name = "hp680-bl", + .pm = &hp680bl_pm_ops, }, }; @@ -151,25 +150,21 @@ static int __init hp680bl_init(void) int ret; ret = platform_driver_register(&hp680bl_driver); - if (!ret) { - hp680bl_device = platform_device_alloc("hp680-bl", -1); - if (!hp680bl_device) - return -ENOMEM; - - ret = platform_device_add(hp680bl_device); - - if (ret) { - platform_device_put(hp680bl_device); - platform_driver_unregister(&hp680bl_driver); - } + if (ret) + return ret; + hp680bl_device = platform_device_register_simple("hp680-bl", -1, + NULL, 0); + if (IS_ERR(hp680bl_device)) { + platform_driver_unregister(&hp680bl_driver); + return PTR_ERR(hp680bl_device); } - return ret; + return 0; } static void __exit hp680bl_exit(void) { platform_device_unregister(hp680bl_device); - platform_driver_unregister(&hp680bl_driver); + platform_driver_unregister(&hp680bl_driver); } module_init(hp680bl_init); diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c new file mode 100644 index 00000000000..23f50b92a93 --- /dev/null +++ b/drivers/video/backlight/hx8357.c @@ -0,0 +1,682 @@ +/* + * Driver for the Himax HX-8357 LCD Controller + * + * Copyright 2012 Free Electrons + * + * Licensed under the GPLv2 or later. + */ + +#include <linux/delay.h> +#include <linux/lcd.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/spi/spi.h> + +#define HX8357_NUM_IM_PINS 3 + +#define HX8357_SWRESET 0x01 +#define HX8357_GET_RED_CHANNEL 0x06 +#define HX8357_GET_GREEN_CHANNEL 0x07 +#define HX8357_GET_BLUE_CHANNEL 0x08 +#define HX8357_GET_POWER_MODE 0x0a +#define HX8357_GET_MADCTL 0x0b +#define HX8357_GET_PIXEL_FORMAT 0x0c +#define HX8357_GET_DISPLAY_MODE 0x0d +#define HX8357_GET_SIGNAL_MODE 0x0e +#define HX8357_GET_DIAGNOSTIC_RESULT 0x0f +#define HX8357_ENTER_SLEEP_MODE 0x10 +#define HX8357_EXIT_SLEEP_MODE 0x11 +#define HX8357_ENTER_PARTIAL_MODE 0x12 +#define HX8357_ENTER_NORMAL_MODE 0x13 +#define HX8357_EXIT_INVERSION_MODE 0x20 +#define HX8357_ENTER_INVERSION_MODE 0x21 +#define HX8357_SET_DISPLAY_OFF 0x28 +#define HX8357_SET_DISPLAY_ON 0x29 +#define HX8357_SET_COLUMN_ADDRESS 0x2a +#define HX8357_SET_PAGE_ADDRESS 0x2b +#define HX8357_WRITE_MEMORY_START 0x2c +#define HX8357_READ_MEMORY_START 0x2e +#define HX8357_SET_PARTIAL_AREA 0x30 +#define HX8357_SET_SCROLL_AREA 0x33 +#define HX8357_SET_TEAR_OFF 0x34 +#define HX8357_SET_TEAR_ON 0x35 +#define HX8357_SET_ADDRESS_MODE 0x36 +#define HX8357_SET_SCROLL_START 0x37 +#define HX8357_EXIT_IDLE_MODE 0x38 +#define HX8357_ENTER_IDLE_MODE 0x39 +#define HX8357_SET_PIXEL_FORMAT 0x3a +#define HX8357_SET_PIXEL_FORMAT_DBI_3BIT (0x1) +#define HX8357_SET_PIXEL_FORMAT_DBI_16BIT (0x5) +#define HX8357_SET_PIXEL_FORMAT_DBI_18BIT (0x6) +#define HX8357_SET_PIXEL_FORMAT_DPI_3BIT (0x1 << 4) +#define HX8357_SET_PIXEL_FORMAT_DPI_16BIT (0x5 << 4) +#define HX8357_SET_PIXEL_FORMAT_DPI_18BIT (0x6 << 4) +#define HX8357_WRITE_MEMORY_CONTINUE 0x3c +#define HX8357_READ_MEMORY_CONTINUE 0x3e +#define HX8357_SET_TEAR_SCAN_LINES 0x44 +#define HX8357_GET_SCAN_LINES 0x45 +#define HX8357_READ_DDB_START 0xa1 +#define HX8357_SET_DISPLAY_MODE 0xb4 +#define HX8357_SET_DISPLAY_MODE_RGB_THROUGH (0x3) +#define HX8357_SET_DISPLAY_MODE_RGB_INTERFACE (1 << 4) +#define HX8357_SET_PANEL_DRIVING 0xc0 +#define HX8357_SET_DISPLAY_FRAME 0xc5 +#define HX8357_SET_RGB 0xc6 +#define HX8357_SET_RGB_ENABLE_HIGH (1 << 1) +#define HX8357_SET_GAMMA 0xc8 +#define HX8357_SET_POWER 0xd0 +#define HX8357_SET_VCOM 0xd1 +#define HX8357_SET_POWER_NORMAL 0xd2 +#define HX8357_SET_PANEL_RELATED 0xe9 + +#define HX8369_SET_DISPLAY_BRIGHTNESS 0x51 +#define HX8369_WRITE_CABC_DISPLAY_VALUE 0x53 +#define HX8369_WRITE_CABC_BRIGHT_CTRL 0x55 +#define HX8369_WRITE_CABC_MIN_BRIGHTNESS 0x5e +#define HX8369_SET_POWER 0xb1 +#define HX8369_SET_DISPLAY_MODE 0xb2 +#define HX8369_SET_DISPLAY_WAVEFORM_CYC 0xb4 +#define HX8369_SET_VCOM 0xb6 +#define HX8369_SET_EXTENSION_COMMAND 0xb9 +#define HX8369_SET_GIP 0xd5 +#define HX8369_SET_GAMMA_CURVE_RELATED 0xe0 + +struct hx8357_data { + unsigned im_pins[HX8357_NUM_IM_PINS]; + unsigned reset; + struct spi_device *spi; + int state; + bool use_im_pins; +}; + +static u8 hx8357_seq_power[] = { + HX8357_SET_POWER, 0x44, 0x41, 0x06, +}; + +static u8 hx8357_seq_vcom[] = { + HX8357_SET_VCOM, 0x40, 0x10, +}; + +static u8 hx8357_seq_power_normal[] = { + HX8357_SET_POWER_NORMAL, 0x05, 0x12, +}; + +static u8 hx8357_seq_panel_driving[] = { + HX8357_SET_PANEL_DRIVING, 0x14, 0x3b, 0x00, 0x02, 0x11, +}; + +static u8 hx8357_seq_display_frame[] = { + HX8357_SET_DISPLAY_FRAME, 0x0c, +}; + +static u8 hx8357_seq_panel_related[] = { + HX8357_SET_PANEL_RELATED, 0x01, +}; + +static u8 hx8357_seq_undefined1[] = { + 0xea, 0x03, 0x00, 0x00, +}; + +static u8 hx8357_seq_undefined2[] = { + 0xeb, 0x40, 0x54, 0x26, 0xdb, +}; + +static u8 hx8357_seq_gamma[] = { + HX8357_SET_GAMMA, 0x00, 0x15, 0x00, 0x22, 0x00, + 0x08, 0x77, 0x26, 0x77, 0x22, 0x04, 0x00, +}; + +static u8 hx8357_seq_address_mode[] = { + HX8357_SET_ADDRESS_MODE, 0xc0, +}; + +static u8 hx8357_seq_pixel_format[] = { + HX8357_SET_PIXEL_FORMAT, + HX8357_SET_PIXEL_FORMAT_DPI_18BIT | + HX8357_SET_PIXEL_FORMAT_DBI_18BIT, +}; + +static u8 hx8357_seq_column_address[] = { + HX8357_SET_COLUMN_ADDRESS, 0x00, 0x00, 0x01, 0x3f, +}; + +static u8 hx8357_seq_page_address[] = { + HX8357_SET_PAGE_ADDRESS, 0x00, 0x00, 0x01, 0xdf, +}; + +static u8 hx8357_seq_rgb[] = { + HX8357_SET_RGB, 0x02, +}; + +static u8 hx8357_seq_display_mode[] = { + HX8357_SET_DISPLAY_MODE, + HX8357_SET_DISPLAY_MODE_RGB_THROUGH | + HX8357_SET_DISPLAY_MODE_RGB_INTERFACE, +}; + +static u8 hx8369_seq_write_CABC_min_brightness[] = { + HX8369_WRITE_CABC_MIN_BRIGHTNESS, 0x00, +}; + +static u8 hx8369_seq_write_CABC_control[] = { + HX8369_WRITE_CABC_DISPLAY_VALUE, 0x24, +}; + +static u8 hx8369_seq_set_display_brightness[] = { + HX8369_SET_DISPLAY_BRIGHTNESS, 0xFF, +}; + +static u8 hx8369_seq_write_CABC_control_setting[] = { + HX8369_WRITE_CABC_BRIGHT_CTRL, 0x02, +}; + +static u8 hx8369_seq_extension_command[] = { + HX8369_SET_EXTENSION_COMMAND, 0xff, 0x83, 0x69, +}; + +static u8 hx8369_seq_display_related[] = { + HX8369_SET_DISPLAY_MODE, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00, + 0xff, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00, 0x01, +}; + +static u8 hx8369_seq_panel_waveform_cycle[] = { + HX8369_SET_DISPLAY_WAVEFORM_CYC, 0x0a, 0x1d, 0x80, 0x06, 0x02, +}; + +static u8 hx8369_seq_set_address_mode[] = { + HX8357_SET_ADDRESS_MODE, 0x00, +}; + +static u8 hx8369_seq_vcom[] = { + HX8369_SET_VCOM, 0x3e, 0x3e, +}; + +static u8 hx8369_seq_gip[] = { + HX8369_SET_GIP, 0x00, 0x01, 0x03, 0x25, 0x01, 0x02, 0x28, 0x70, + 0x11, 0x13, 0x00, 0x00, 0x40, 0x26, 0x51, 0x37, 0x00, 0x00, 0x71, + 0x35, 0x60, 0x24, 0x07, 0x0f, 0x04, 0x04, +}; + +static u8 hx8369_seq_power[] = { + HX8369_SET_POWER, 0x01, 0x00, 0x34, 0x03, 0x00, 0x11, 0x11, 0x32, + 0x2f, 0x3f, 0x3f, 0x01, 0x3a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6, +}; + +static u8 hx8369_seq_gamma_curve_related[] = { + HX8369_SET_GAMMA_CURVE_RELATED, 0x00, 0x0d, 0x19, 0x2f, 0x3b, 0x3d, + 0x2e, 0x4a, 0x08, 0x0e, 0x0f, 0x14, 0x16, 0x14, 0x14, 0x14, 0x1e, + 0x00, 0x0d, 0x19, 0x2f, 0x3b, 0x3d, 0x2e, 0x4a, 0x08, 0x0e, 0x0f, + 0x14, 0x16, 0x14, 0x14, 0x14, 0x1e, +}; + +static int hx8357_spi_write_then_read(struct lcd_device *lcdev, + u8 *txbuf, u16 txlen, + u8 *rxbuf, u16 rxlen) +{ + struct hx8357_data *lcd = lcd_get_data(lcdev); + struct spi_message msg; + struct spi_transfer xfer[2]; + u16 *local_txbuf = NULL; + int ret = 0; + + memset(xfer, 0, sizeof(xfer)); + spi_message_init(&msg); + + if (txlen) { + int i; + + local_txbuf = kcalloc(txlen, sizeof(*local_txbuf), GFP_KERNEL); + + if (!local_txbuf) + return -ENOMEM; + + for (i = 0; i < txlen; i++) { + local_txbuf[i] = txbuf[i]; + if (i > 0) + local_txbuf[i] |= 1 << 8; + } + + xfer[0].len = 2 * txlen; + xfer[0].bits_per_word = 9; + xfer[0].tx_buf = local_txbuf; + spi_message_add_tail(&xfer[0], &msg); + } + + if (rxlen) { + xfer[1].len = rxlen; + xfer[1].bits_per_word = 8; + xfer[1].rx_buf = rxbuf; + spi_message_add_tail(&xfer[1], &msg); + } + + ret = spi_sync(lcd->spi, &msg); + if (ret < 0) + dev_err(&lcdev->dev, "Couldn't send SPI data\n"); + + if (txlen) + kfree(local_txbuf); + + return ret; +} + +static inline int hx8357_spi_write_array(struct lcd_device *lcdev, + u8 *value, u8 len) +{ + return hx8357_spi_write_then_read(lcdev, value, len, NULL, 0); +} + +static inline int hx8357_spi_write_byte(struct lcd_device *lcdev, + u8 value) +{ + return hx8357_spi_write_then_read(lcdev, &value, 1, NULL, 0); +} + +static int hx8357_enter_standby(struct lcd_device *lcdev) +{ + int ret; + + ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_OFF); + if (ret < 0) + return ret; + + usleep_range(10000, 12000); + + ret = hx8357_spi_write_byte(lcdev, HX8357_ENTER_SLEEP_MODE); + if (ret < 0) + return ret; + + /* + * The controller needs 120ms when entering in sleep mode before we can + * send the command to go off sleep mode + */ + msleep(120); + + return 0; +} + +static int hx8357_exit_standby(struct lcd_device *lcdev) +{ + int ret; + + ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE); + if (ret < 0) + return ret; + + /* + * The controller needs 120ms when exiting from sleep mode before we + * can send the command to enter in sleep mode + */ + msleep(120); + + ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_ON); + if (ret < 0) + return ret; + + return 0; +} + +static void hx8357_lcd_reset(struct lcd_device *lcdev) +{ + struct hx8357_data *lcd = lcd_get_data(lcdev); + + /* Reset the screen */ + gpio_set_value(lcd->reset, 1); + usleep_range(10000, 12000); + gpio_set_value(lcd->reset, 0); + usleep_range(10000, 12000); + gpio_set_value(lcd->reset, 1); + + /* The controller needs 120ms to recover from reset */ + msleep(120); +} + +static int hx8357_lcd_init(struct lcd_device *lcdev) +{ + struct hx8357_data *lcd = lcd_get_data(lcdev); + int ret; + + /* + * Set the interface selection pins to SPI mode, with three + * wires + */ + if (lcd->use_im_pins) { + gpio_set_value_cansleep(lcd->im_pins[0], 1); + gpio_set_value_cansleep(lcd->im_pins[1], 0); + gpio_set_value_cansleep(lcd->im_pins[2], 1); + } + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_power, + ARRAY_SIZE(hx8357_seq_power)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_vcom, + ARRAY_SIZE(hx8357_seq_vcom)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_power_normal, + ARRAY_SIZE(hx8357_seq_power_normal)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_panel_driving, + ARRAY_SIZE(hx8357_seq_panel_driving)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_display_frame, + ARRAY_SIZE(hx8357_seq_display_frame)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_panel_related, + ARRAY_SIZE(hx8357_seq_panel_related)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_undefined1, + ARRAY_SIZE(hx8357_seq_undefined1)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_undefined2, + ARRAY_SIZE(hx8357_seq_undefined2)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_gamma, + ARRAY_SIZE(hx8357_seq_gamma)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_address_mode, + ARRAY_SIZE(hx8357_seq_address_mode)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_pixel_format, + ARRAY_SIZE(hx8357_seq_pixel_format)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_column_address, + ARRAY_SIZE(hx8357_seq_column_address)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_page_address, + ARRAY_SIZE(hx8357_seq_page_address)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_rgb, + ARRAY_SIZE(hx8357_seq_rgb)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8357_seq_display_mode, + ARRAY_SIZE(hx8357_seq_display_mode)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE); + if (ret < 0) + return ret; + + /* + * The controller needs 120ms to fully recover from exiting sleep mode + */ + msleep(120); + + ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_ON); + if (ret < 0) + return ret; + + usleep_range(5000, 7000); + + ret = hx8357_spi_write_byte(lcdev, HX8357_WRITE_MEMORY_START); + if (ret < 0) + return ret; + + return 0; +} + +static int hx8369_lcd_init(struct lcd_device *lcdev) +{ + int ret; + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_extension_command, + ARRAY_SIZE(hx8369_seq_extension_command)); + if (ret < 0) + return ret; + usleep_range(10000, 12000); + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_display_related, + ARRAY_SIZE(hx8369_seq_display_related)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_panel_waveform_cycle, + ARRAY_SIZE(hx8369_seq_panel_waveform_cycle)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_set_address_mode, + ARRAY_SIZE(hx8369_seq_set_address_mode)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_vcom, + ARRAY_SIZE(hx8369_seq_vcom)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_gip, + ARRAY_SIZE(hx8369_seq_gip)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_power, + ARRAY_SIZE(hx8369_seq_power)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE); + if (ret < 0) + return ret; + + /* + * The controller needs 120ms to fully recover from exiting sleep mode + */ + msleep(120); + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_gamma_curve_related, + ARRAY_SIZE(hx8369_seq_gamma_curve_related)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE); + if (ret < 0) + return ret; + usleep_range(1000, 1200); + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_write_CABC_control, + ARRAY_SIZE(hx8369_seq_write_CABC_control)); + if (ret < 0) + return ret; + usleep_range(10000, 12000); + + ret = hx8357_spi_write_array(lcdev, + hx8369_seq_write_CABC_control_setting, + ARRAY_SIZE(hx8369_seq_write_CABC_control_setting)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_array(lcdev, + hx8369_seq_write_CABC_min_brightness, + ARRAY_SIZE(hx8369_seq_write_CABC_min_brightness)); + if (ret < 0) + return ret; + usleep_range(10000, 12000); + + ret = hx8357_spi_write_array(lcdev, hx8369_seq_set_display_brightness, + ARRAY_SIZE(hx8369_seq_set_display_brightness)); + if (ret < 0) + return ret; + + ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_ON); + if (ret < 0) + return ret; + + return 0; +} + +#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) + +static int hx8357_set_power(struct lcd_device *lcdev, int power) +{ + struct hx8357_data *lcd = lcd_get_data(lcdev); + int ret = 0; + + if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->state)) + ret = hx8357_exit_standby(lcdev); + else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->state)) + ret = hx8357_enter_standby(lcdev); + + if (ret == 0) + lcd->state = power; + else + dev_warn(&lcdev->dev, "failed to set power mode %d\n", power); + + return ret; +} + +static int hx8357_get_power(struct lcd_device *lcdev) +{ + struct hx8357_data *lcd = lcd_get_data(lcdev); + + return lcd->state; +} + +static struct lcd_ops hx8357_ops = { + .set_power = hx8357_set_power, + .get_power = hx8357_get_power, +}; + +static const struct of_device_id hx8357_dt_ids[] = { + { + .compatible = "himax,hx8357", + .data = hx8357_lcd_init, + }, + { + .compatible = "himax,hx8369", + .data = hx8369_lcd_init, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, hx8357_dt_ids); + +static int hx8357_probe(struct spi_device *spi) +{ + struct lcd_device *lcdev; + struct hx8357_data *lcd; + const struct of_device_id *match; + int i, ret; + + lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL); + if (!lcd) + return -ENOMEM; + + ret = spi_setup(spi); + if (ret < 0) { + dev_err(&spi->dev, "SPI setup failed.\n"); + return ret; + } + + lcd->spi = spi; + + match = of_match_device(hx8357_dt_ids, &spi->dev); + if (!match || !match->data) + return -EINVAL; + + lcd->reset = of_get_named_gpio(spi->dev.of_node, "gpios-reset", 0); + if (!gpio_is_valid(lcd->reset)) { + dev_err(&spi->dev, "Missing dt property: gpios-reset\n"); + return -EINVAL; + } + + ret = devm_gpio_request_one(&spi->dev, lcd->reset, + GPIOF_OUT_INIT_HIGH, + "hx8357-reset"); + if (ret) { + dev_err(&spi->dev, + "failed to request gpio %d: %d\n", + lcd->reset, ret); + return -EINVAL; + } + + if (of_find_property(spi->dev.of_node, "im-gpios", NULL)) { + lcd->use_im_pins = 1; + + for (i = 0; i < HX8357_NUM_IM_PINS; i++) { + lcd->im_pins[i] = of_get_named_gpio(spi->dev.of_node, + "im-gpios", i); + if (lcd->im_pins[i] == -EPROBE_DEFER) { + dev_info(&spi->dev, "GPIO requested is not here yet, deferring the probe\n"); + return -EPROBE_DEFER; + } + if (!gpio_is_valid(lcd->im_pins[i])) { + dev_err(&spi->dev, "Missing dt property: im-gpios\n"); + return -EINVAL; + } + + ret = devm_gpio_request_one(&spi->dev, lcd->im_pins[i], + GPIOF_OUT_INIT_LOW, + "im_pins"); + if (ret) { + dev_err(&spi->dev, "failed to request gpio %d: %d\n", + lcd->im_pins[i], ret); + return -EINVAL; + } + } + } else { + lcd->use_im_pins = 0; + } + + lcdev = devm_lcd_device_register(&spi->dev, "mxsfb", &spi->dev, lcd, + &hx8357_ops); + if (IS_ERR(lcdev)) { + ret = PTR_ERR(lcdev); + return ret; + } + spi_set_drvdata(spi, lcdev); + + hx8357_lcd_reset(lcdev); + + ret = ((int (*)(struct lcd_device *))match->data)(lcdev); + if (ret) { + dev_err(&spi->dev, "Couldn't initialize panel\n"); + return ret; + } + + dev_info(&spi->dev, "Panel probed\n"); + + return 0; +} + +static struct spi_driver hx8357_driver = { + .probe = hx8357_probe, + .driver = { + .name = "hx8357", + .of_match_table = hx8357_dt_ids, + }, +}; + +module_spi_driver(hx8357_driver); + +MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); +MODULE_DESCRIPTION("Himax HX-8357 LCD Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/ili922x.c b/drivers/video/backlight/ili922x.c new file mode 100644 index 00000000000..ea67fe199e3 --- /dev/null +++ b/drivers/video/backlight/ili922x.c @@ -0,0 +1,550 @@ +/* + * (C) Copyright 2008 + * Stefano Babic, DENX Software Engineering, sbabic@denx.de. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This driver implements a lcd device for the ILITEK 922x display + * controller. The interface to the display is SPI and the display's + * memory is cyclically updated over the RGB interface. + */ + +#include <linux/fb.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/lcd.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/string.h> + +/* Register offset, see manual section 8.2 */ +#define REG_START_OSCILLATION 0x00 +#define REG_DRIVER_CODE_READ 0x00 +#define REG_DRIVER_OUTPUT_CONTROL 0x01 +#define REG_LCD_AC_DRIVEING_CONTROL 0x02 +#define REG_ENTRY_MODE 0x03 +#define REG_COMPARE_1 0x04 +#define REG_COMPARE_2 0x05 +#define REG_DISPLAY_CONTROL_1 0x07 +#define REG_DISPLAY_CONTROL_2 0x08 +#define REG_DISPLAY_CONTROL_3 0x09 +#define REG_FRAME_CYCLE_CONTROL 0x0B +#define REG_EXT_INTF_CONTROL 0x0C +#define REG_POWER_CONTROL_1 0x10 +#define REG_POWER_CONTROL_2 0x11 +#define REG_POWER_CONTROL_3 0x12 +#define REG_POWER_CONTROL_4 0x13 +#define REG_RAM_ADDRESS_SET 0x21 +#define REG_WRITE_DATA_TO_GRAM 0x22 +#define REG_RAM_WRITE_MASK1 0x23 +#define REG_RAM_WRITE_MASK2 0x24 +#define REG_GAMMA_CONTROL_1 0x30 +#define REG_GAMMA_CONTROL_2 0x31 +#define REG_GAMMA_CONTROL_3 0x32 +#define REG_GAMMA_CONTROL_4 0x33 +#define REG_GAMMA_CONTROL_5 0x34 +#define REG_GAMMA_CONTROL_6 0x35 +#define REG_GAMMA_CONTROL_7 0x36 +#define REG_GAMMA_CONTROL_8 0x37 +#define REG_GAMMA_CONTROL_9 0x38 +#define REG_GAMMA_CONTROL_10 0x39 +#define REG_GATE_SCAN_CONTROL 0x40 +#define REG_VERT_SCROLL_CONTROL 0x41 +#define REG_FIRST_SCREEN_DRIVE_POS 0x42 +#define REG_SECOND_SCREEN_DRIVE_POS 0x43 +#define REG_RAM_ADDR_POS_H 0x44 +#define REG_RAM_ADDR_POS_V 0x45 +#define REG_OSCILLATOR_CONTROL 0x4F +#define REG_GPIO 0x60 +#define REG_OTP_VCM_PROGRAMMING 0x61 +#define REG_OTP_VCM_STATUS_ENABLE 0x62 +#define REG_OTP_PROGRAMMING_ID_KEY 0x65 + +/* + * maximum frequency for register access + * (not for the GRAM access) + */ +#define ILITEK_MAX_FREQ_REG 4000000 + +/* + * Device ID as found in the datasheet (supports 9221 and 9222) + */ +#define ILITEK_DEVICE_ID 0x9220 +#define ILITEK_DEVICE_ID_MASK 0xFFF0 + +/* Last two bits in the START BYTE */ +#define START_RS_INDEX 0 +#define START_RS_REG 1 +#define START_RW_WRITE 0 +#define START_RW_READ 1 + +/** + * START_BYTE(id, rs, rw) + * + * Set the start byte according to the required operation. + * The start byte is defined as: + * ---------------------------------- + * | 0 | 1 | 1 | 1 | 0 | ID | RS | RW | + * ---------------------------------- + * @id: display's id as set by the manufacturer + * @rs: operation type bit, one of: + * - START_RS_INDEX set the index register + * - START_RS_REG write/read registers/GRAM + * @rw: read/write operation + * - START_RW_WRITE write + * - START_RW_READ read + */ +#define START_BYTE(id, rs, rw) \ + (0x70 | (((id) & 0x01) << 2) | (((rs) & 0x01) << 1) | ((rw) & 0x01)) + +/** + * CHECK_FREQ_REG(spi_device s, spi_transfer x) - Check the frequency + * for the SPI transfer. According to the datasheet, the controller + * accept higher frequency for the GRAM transfer, but it requires + * lower frequency when the registers are read/written. + * The macro sets the frequency in the spi_transfer structure if + * the frequency exceeds the maximum value. + */ +#define CHECK_FREQ_REG(s, x) \ + do { \ + if (s->max_speed_hz > ILITEK_MAX_FREQ_REG) \ + ((struct spi_transfer *)x)->speed_hz = \ + ILITEK_MAX_FREQ_REG; \ + } while (0) + +#define CMD_BUFSIZE 16 + +#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) + +#define set_tx_byte(b) (tx_invert ? ~(b) : b) + +/** + * ili922x_id - id as set by manufacturer + */ +static int ili922x_id = 1; +module_param(ili922x_id, int, 0); + +static int tx_invert; +module_param(tx_invert, int, 0); + +/** + * driver's private structure + */ +struct ili922x { + struct spi_device *spi; + struct lcd_device *ld; + int power; +}; + +/** + * ili922x_read_status - read status register from display + * @spi: spi device + * @rs: output value + */ +static int ili922x_read_status(struct spi_device *spi, u16 *rs) +{ + struct spi_message msg; + struct spi_transfer xfer; + unsigned char tbuf[CMD_BUFSIZE]; + unsigned char rbuf[CMD_BUFSIZE]; + int ret, i; + + memset(&xfer, 0, sizeof(struct spi_transfer)); + spi_message_init(&msg); + xfer.tx_buf = tbuf; + xfer.rx_buf = rbuf; + xfer.cs_change = 1; + CHECK_FREQ_REG(spi, &xfer); + + tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_INDEX, + START_RW_READ)); + /* + * we need 4-byte xfer here due to invalid dummy byte + * received after start byte + */ + for (i = 1; i < 4; i++) + tbuf[i] = set_tx_byte(0); /* dummy */ + + xfer.bits_per_word = 8; + xfer.len = 4; + spi_message_add_tail(&xfer, &msg); + ret = spi_sync(spi, &msg); + if (ret < 0) { + dev_dbg(&spi->dev, "Error sending SPI message 0x%x", ret); + return ret; + } + + *rs = (rbuf[2] << 8) + rbuf[3]; + return 0; +} + +/** + * ili922x_read - read register from display + * @spi: spi device + * @reg: offset of the register to be read + * @rx: output value + */ +static int ili922x_read(struct spi_device *spi, u8 reg, u16 *rx) +{ + struct spi_message msg; + struct spi_transfer xfer_regindex, xfer_regvalue; + unsigned char tbuf[CMD_BUFSIZE]; + unsigned char rbuf[CMD_BUFSIZE]; + int ret, len = 0, send_bytes; + + memset(&xfer_regindex, 0, sizeof(struct spi_transfer)); + memset(&xfer_regvalue, 0, sizeof(struct spi_transfer)); + spi_message_init(&msg); + xfer_regindex.tx_buf = tbuf; + xfer_regindex.rx_buf = rbuf; + xfer_regindex.cs_change = 1; + CHECK_FREQ_REG(spi, &xfer_regindex); + + tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_INDEX, + START_RW_WRITE)); + tbuf[1] = set_tx_byte(0); + tbuf[2] = set_tx_byte(reg); + xfer_regindex.bits_per_word = 8; + len = xfer_regindex.len = 3; + spi_message_add_tail(&xfer_regindex, &msg); + + send_bytes = len; + + tbuf[len++] = set_tx_byte(START_BYTE(ili922x_id, START_RS_REG, + START_RW_READ)); + tbuf[len++] = set_tx_byte(0); + tbuf[len] = set_tx_byte(0); + + xfer_regvalue.cs_change = 1; + xfer_regvalue.len = 3; + xfer_regvalue.tx_buf = &tbuf[send_bytes]; + xfer_regvalue.rx_buf = &rbuf[send_bytes]; + CHECK_FREQ_REG(spi, &xfer_regvalue); + + spi_message_add_tail(&xfer_regvalue, &msg); + ret = spi_sync(spi, &msg); + if (ret < 0) { + dev_dbg(&spi->dev, "Error sending SPI message 0x%x", ret); + return ret; + } + + *rx = (rbuf[1 + send_bytes] << 8) + rbuf[2 + send_bytes]; + return 0; +} + +/** + * ili922x_write - write a controller register + * @spi: struct spi_device * + * @reg: offset of the register to be written + * @value: value to be written + */ +static int ili922x_write(struct spi_device *spi, u8 reg, u16 value) +{ + struct spi_message msg; + struct spi_transfer xfer_regindex, xfer_regvalue; + unsigned char tbuf[CMD_BUFSIZE]; + unsigned char rbuf[CMD_BUFSIZE]; + int ret, len = 0; + + memset(&xfer_regindex, 0, sizeof(struct spi_transfer)); + memset(&xfer_regvalue, 0, sizeof(struct spi_transfer)); + + spi_message_init(&msg); + xfer_regindex.tx_buf = tbuf; + xfer_regindex.rx_buf = rbuf; + xfer_regindex.cs_change = 1; + CHECK_FREQ_REG(spi, &xfer_regindex); + + tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_INDEX, + START_RW_WRITE)); + tbuf[1] = set_tx_byte(0); + tbuf[2] = set_tx_byte(reg); + xfer_regindex.bits_per_word = 8; + xfer_regindex.len = 3; + spi_message_add_tail(&xfer_regindex, &msg); + + ret = spi_sync(spi, &msg); + + spi_message_init(&msg); + len = 0; + tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_REG, + START_RW_WRITE)); + tbuf[1] = set_tx_byte((value & 0xFF00) >> 8); + tbuf[2] = set_tx_byte(value & 0x00FF); + + xfer_regvalue.cs_change = 1; + xfer_regvalue.len = 3; + xfer_regvalue.tx_buf = tbuf; + xfer_regvalue.rx_buf = rbuf; + CHECK_FREQ_REG(spi, &xfer_regvalue); + + spi_message_add_tail(&xfer_regvalue, &msg); + + ret = spi_sync(spi, &msg); + if (ret < 0) { + dev_err(&spi->dev, "Error sending SPI message 0x%x", ret); + return ret; + } + return 0; +} + +#ifdef DEBUG +/** + * ili922x_reg_dump - dump all registers + */ +static void ili922x_reg_dump(struct spi_device *spi) +{ + u8 reg; + u16 rx; + + dev_dbg(&spi->dev, "ILI922x configuration registers:\n"); + for (reg = REG_START_OSCILLATION; + reg <= REG_OTP_PROGRAMMING_ID_KEY; reg++) { + ili922x_read(spi, reg, &rx); + dev_dbg(&spi->dev, "reg @ 0x%02X: 0x%04X\n", reg, rx); + } +} +#else +static inline void ili922x_reg_dump(struct spi_device *spi) {} +#endif + +/** + * set_write_to_gram_reg - initialize the display to write the GRAM + * @spi: spi device + */ +static void set_write_to_gram_reg(struct spi_device *spi) +{ + struct spi_message msg; + struct spi_transfer xfer; + unsigned char tbuf[CMD_BUFSIZE]; + + memset(&xfer, 0, sizeof(struct spi_transfer)); + + spi_message_init(&msg); + xfer.tx_buf = tbuf; + xfer.rx_buf = NULL; + xfer.cs_change = 1; + + tbuf[0] = START_BYTE(ili922x_id, START_RS_INDEX, START_RW_WRITE); + tbuf[1] = 0; + tbuf[2] = REG_WRITE_DATA_TO_GRAM; + + xfer.bits_per_word = 8; + xfer.len = 3; + spi_message_add_tail(&xfer, &msg); + spi_sync(spi, &msg); +} + +/** + * ili922x_poweron - turn the display on + * @spi: spi device + * + * The sequence to turn on the display is taken from + * the datasheet and/or the example code provided by the + * manufacturer. + */ +static int ili922x_poweron(struct spi_device *spi) +{ + int ret; + + /* Power on */ + ret = ili922x_write(spi, REG_POWER_CONTROL_1, 0x0000); + usleep_range(10000, 10500); + ret += ili922x_write(spi, REG_POWER_CONTROL_2, 0x0000); + ret += ili922x_write(spi, REG_POWER_CONTROL_3, 0x0000); + msleep(40); + ret += ili922x_write(spi, REG_POWER_CONTROL_4, 0x0000); + msleep(40); + /* register 0x56 is not documented in the datasheet */ + ret += ili922x_write(spi, 0x56, 0x080F); + ret += ili922x_write(spi, REG_POWER_CONTROL_1, 0x4240); + usleep_range(10000, 10500); + ret += ili922x_write(spi, REG_POWER_CONTROL_2, 0x0000); + ret += ili922x_write(spi, REG_POWER_CONTROL_3, 0x0014); + msleep(40); + ret += ili922x_write(spi, REG_POWER_CONTROL_4, 0x1319); + msleep(40); + + return ret; +} + +/** + * ili922x_poweroff - turn the display off + * @spi: spi device + */ +static int ili922x_poweroff(struct spi_device *spi) +{ + int ret; + + /* Power off */ + ret = ili922x_write(spi, REG_POWER_CONTROL_1, 0x0000); + usleep_range(10000, 10500); + ret += ili922x_write(spi, REG_POWER_CONTROL_2, 0x0000); + ret += ili922x_write(spi, REG_POWER_CONTROL_3, 0x0000); + msleep(40); + ret += ili922x_write(spi, REG_POWER_CONTROL_4, 0x0000); + msleep(40); + + return ret; +} + +/** + * ili922x_display_init - initialize the display by setting + * the configuration registers + * @spi: spi device + */ +static void ili922x_display_init(struct spi_device *spi) +{ + ili922x_write(spi, REG_START_OSCILLATION, 1); + usleep_range(10000, 10500); + ili922x_write(spi, REG_DRIVER_OUTPUT_CONTROL, 0x691B); + ili922x_write(spi, REG_LCD_AC_DRIVEING_CONTROL, 0x0700); + ili922x_write(spi, REG_ENTRY_MODE, 0x1030); + ili922x_write(spi, REG_COMPARE_1, 0x0000); + ili922x_write(spi, REG_COMPARE_2, 0x0000); + ili922x_write(spi, REG_DISPLAY_CONTROL_1, 0x0037); + ili922x_write(spi, REG_DISPLAY_CONTROL_2, 0x0202); + ili922x_write(spi, REG_DISPLAY_CONTROL_3, 0x0000); + ili922x_write(spi, REG_FRAME_CYCLE_CONTROL, 0x0000); + + /* Set RGB interface */ + ili922x_write(spi, REG_EXT_INTF_CONTROL, 0x0110); + + ili922x_poweron(spi); + + ili922x_write(spi, REG_GAMMA_CONTROL_1, 0x0302); + ili922x_write(spi, REG_GAMMA_CONTROL_2, 0x0407); + ili922x_write(spi, REG_GAMMA_CONTROL_3, 0x0304); + ili922x_write(spi, REG_GAMMA_CONTROL_4, 0x0203); + ili922x_write(spi, REG_GAMMA_CONTROL_5, 0x0706); + ili922x_write(spi, REG_GAMMA_CONTROL_6, 0x0407); + ili922x_write(spi, REG_GAMMA_CONTROL_7, 0x0706); + ili922x_write(spi, REG_GAMMA_CONTROL_8, 0x0000); + ili922x_write(spi, REG_GAMMA_CONTROL_9, 0x0C06); + ili922x_write(spi, REG_GAMMA_CONTROL_10, 0x0F00); + ili922x_write(spi, REG_RAM_ADDRESS_SET, 0x0000); + ili922x_write(spi, REG_GATE_SCAN_CONTROL, 0x0000); + ili922x_write(spi, REG_VERT_SCROLL_CONTROL, 0x0000); + ili922x_write(spi, REG_FIRST_SCREEN_DRIVE_POS, 0xDB00); + ili922x_write(spi, REG_SECOND_SCREEN_DRIVE_POS, 0xDB00); + ili922x_write(spi, REG_RAM_ADDR_POS_H, 0xAF00); + ili922x_write(spi, REG_RAM_ADDR_POS_V, 0xDB00); + ili922x_reg_dump(spi); + set_write_to_gram_reg(spi); +} + +static int ili922x_lcd_power(struct ili922x *lcd, int power) +{ + int ret = 0; + + if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) + ret = ili922x_poweron(lcd->spi); + else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) + ret = ili922x_poweroff(lcd->spi); + + if (!ret) + lcd->power = power; + + return ret; +} + +static int ili922x_set_power(struct lcd_device *ld, int power) +{ + struct ili922x *ili = lcd_get_data(ld); + + return ili922x_lcd_power(ili, power); +} + +static int ili922x_get_power(struct lcd_device *ld) +{ + struct ili922x *ili = lcd_get_data(ld); + + return ili->power; +} + +static struct lcd_ops ili922x_ops = { + .get_power = ili922x_get_power, + .set_power = ili922x_set_power, +}; + +static int ili922x_probe(struct spi_device *spi) +{ + struct ili922x *ili; + struct lcd_device *lcd; + int ret; + u16 reg = 0; + + ili = devm_kzalloc(&spi->dev, sizeof(*ili), GFP_KERNEL); + if (!ili) + return -ENOMEM; + + ili->spi = spi; + spi_set_drvdata(spi, ili); + + /* check if the device is connected */ + ret = ili922x_read(spi, REG_DRIVER_CODE_READ, ®); + if (ret || ((reg & ILITEK_DEVICE_ID_MASK) != ILITEK_DEVICE_ID)) { + dev_err(&spi->dev, + "no LCD found: Chip ID 0x%x, ret %d\n", + reg, ret); + return -ENODEV; + } else { + dev_info(&spi->dev, "ILI%x found, SPI freq %d, mode %d\n", + reg, spi->max_speed_hz, spi->mode); + } + + ret = ili922x_read_status(spi, ®); + if (ret) { + dev_err(&spi->dev, "reading RS failed...\n"); + return ret; + } else + dev_dbg(&spi->dev, "status: 0x%x\n", reg); + + ili922x_display_init(spi); + + ili->power = FB_BLANK_POWERDOWN; + + lcd = devm_lcd_device_register(&spi->dev, "ili922xlcd", &spi->dev, ili, + &ili922x_ops); + if (IS_ERR(lcd)) { + dev_err(&spi->dev, "cannot register LCD\n"); + return PTR_ERR(lcd); + } + + ili->ld = lcd; + spi_set_drvdata(spi, ili); + + ili922x_lcd_power(ili, FB_BLANK_UNBLANK); + + return 0; +} + +static int ili922x_remove(struct spi_device *spi) +{ + ili922x_poweroff(spi); + return 0; +} + +static struct spi_driver ili922x_driver = { + .driver = { + .name = "ili922x", + .owner = THIS_MODULE, + }, + .probe = ili922x_probe, + .remove = ili922x_remove, +}; + +module_spi_driver(ili922x_driver); + +MODULE_AUTHOR("Stefano Babic <sbabic@denx.de>"); +MODULE_DESCRIPTION("ILI9221/9222 LCD driver"); +MODULE_LICENSE("GPL"); +MODULE_PARM_DESC(ili922x_id, "set controller identifier (default=1)"); +MODULE_PARM_DESC(tx_invert, "invert bytes before sending"); diff --git a/drivers/video/backlight/ili9320.c b/drivers/video/backlight/ili9320.c index ba89b41b639..2cf39e6d519 100644 --- a/drivers/video/backlight/ili9320.c +++ b/drivers/video/backlight/ili9320.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/lcd.h> #include <linux/module.h> +#include <linux/slab.h> #include <linux/spi/spi.h> @@ -44,7 +45,7 @@ static inline int ili9320_write_spi(struct ili9320 *ili, /* second message is the data to transfer */ data[0] = spi->id | ILI9320_SPI_DATA | ILI9320_SPI_WRITE; - data[1] = value >> 8; + data[1] = value >> 8; data[2] = value; return spi_sync(spi->dev, &spi->message); @@ -55,11 +56,10 @@ int ili9320_write(struct ili9320 *ili, unsigned int reg, unsigned int value) dev_dbg(ili->dev, "write: reg=%02x, val=%04x\n", reg, value); return ili->write(ili, reg, value); } - EXPORT_SYMBOL_GPL(ili9320_write); int ili9320_write_regs(struct ili9320 *ili, - struct ili9320_reg *values, + const struct ili9320_reg *values, int nr_values) { int index; @@ -73,7 +73,6 @@ int ili9320_write_regs(struct ili9320 *ili, return 0; } - EXPORT_SYMBOL_GPL(ili9320_write_regs); static void ili9320_reset(struct ili9320 *lcd) @@ -170,7 +169,7 @@ static struct lcd_ops ili9320_ops = { .set_power = ili9320_set_power, }; -static void __devinit ili9320_setup_spi(struct ili9320 *ili, +static void ili9320_setup_spi(struct ili9320 *ili, struct spi_device *dev) { struct ili9320_spi *spi = &ili->access.spi; @@ -196,10 +195,10 @@ static void __devinit ili9320_setup_spi(struct ili9320 *ili, spi_message_add_tail(&spi->xfer[1], &spi->message); } -int __devinit ili9320_probe_spi(struct spi_device *spi, +int ili9320_probe_spi(struct spi_device *spi, struct ili9320_client *client) { - struct ili9320_platdata *cfg = spi->dev.platform_data; + struct ili9320_platdata *cfg = dev_get_platdata(&spi->dev); struct device *dev = &spi->dev; struct ili9320 *ili; struct lcd_device *lcd; @@ -219,11 +218,9 @@ int __devinit ili9320_probe_spi(struct spi_device *spi, /* allocate and initialse our state */ - ili = kzalloc(sizeof(struct ili9320), GFP_KERNEL); - if (ili == NULL) { - dev_err(dev, "no memory for device\n"); + ili = devm_kzalloc(&spi->dev, sizeof(struct ili9320), GFP_KERNEL); + if (ili == NULL) return -ENOMEM; - } ili->access.spi.id = ILI9320_SPI_IDCODE | ILI9320_SPI_ID(1); @@ -232,15 +229,15 @@ int __devinit ili9320_probe_spi(struct spi_device *spi, ili->power = FB_BLANK_POWERDOWN; ili->platdata = cfg; - dev_set_drvdata(&spi->dev, ili); + spi_set_drvdata(spi, ili); ili9320_setup_spi(ili, spi); - lcd = lcd_device_register("ili9320", dev, ili, &ili9320_ops); + lcd = devm_lcd_device_register(&spi->dev, "ili9320", dev, ili, + &ili9320_ops); if (IS_ERR(lcd)) { dev_err(dev, "failed to register lcd device\n"); - ret = PTR_ERR(lcd); - goto err_free; + return PTR_ERR(lcd); } ili->lcd = lcd; @@ -250,70 +247,47 @@ int __devinit ili9320_probe_spi(struct spi_device *spi, ret = ili9320_power(ili, FB_BLANK_UNBLANK); if (ret != 0) { dev_err(dev, "failed to set lcd power state\n"); - goto err_unregister; + return ret; } return 0; - - err_unregister: - lcd_device_unregister(lcd); - - err_free: - kfree(ili); - - return ret; } - EXPORT_SYMBOL_GPL(ili9320_probe_spi); -int __devexit ili9320_remove(struct ili9320 *ili) +int ili9320_remove(struct ili9320 *ili) { ili9320_power(ili, FB_BLANK_POWERDOWN); - - lcd_device_unregister(ili->lcd); - kfree(ili); - return 0; } - EXPORT_SYMBOL_GPL(ili9320_remove); -#ifdef CONFIG_PM -int ili9320_suspend(struct ili9320 *lcd, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +int ili9320_suspend(struct ili9320 *lcd) { int ret; - dev_dbg(lcd->dev, "%s: event %d\n", __func__, state.event); + ret = ili9320_power(lcd, FB_BLANK_POWERDOWN); - if (state.event == PM_EVENT_SUSPEND) { - ret = ili9320_power(lcd, FB_BLANK_POWERDOWN); - - if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) { - ili9320_write(lcd, ILI9320_POWER1, lcd->power1 | - ILI9320_POWER1_SLP | - ILI9320_POWER1_DSTB); - lcd->initialised = 0; - } - - return ret; + if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) { + ili9320_write(lcd, ILI9320_POWER1, lcd->power1 | + ILI9320_POWER1_SLP | + ILI9320_POWER1_DSTB); + lcd->initialised = 0; } - return 0; + return ret; } - EXPORT_SYMBOL_GPL(ili9320_suspend); int ili9320_resume(struct ili9320 *lcd) { dev_info(lcd->dev, "resuming from power state %d\n", lcd->power); - if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) { + if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) ili9320_write(lcd, ILI9320_POWER1, 0x00); - } return ili9320_power(lcd, FB_BLANK_UNBLANK); } - EXPORT_SYMBOL_GPL(ili9320_resume); #endif @@ -322,7 +296,6 @@ void ili9320_shutdown(struct ili9320 *lcd) { ili9320_power(lcd, FB_BLANK_POWERDOWN); } - EXPORT_SYMBOL_GPL(ili9320_shutdown); MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>"); diff --git a/drivers/video/backlight/ili9320.h b/drivers/video/backlight/ili9320.h index e388eca7cac..42329e7aa9a 100644 --- a/drivers/video/backlight/ili9320.h +++ b/drivers/video/backlight/ili9320.h @@ -63,7 +63,7 @@ extern int ili9320_write(struct ili9320 *ili, unsigned int reg, unsigned int value); extern int ili9320_write_regs(struct ili9320 *ili, - struct ili9320_reg *values, + const struct ili9320_reg *values, int nr_values); /* Device probe */ @@ -76,5 +76,5 @@ extern void ili9320_shutdown(struct ili9320 *lcd); /* PM */ -extern int ili9320_suspend(struct ili9320 *lcd, pm_message_t state); +extern int ili9320_suspend(struct ili9320 *lcd); extern int ili9320_resume(struct ili9320 *lcd); diff --git a/drivers/video/backlight/jornada720_bl.c b/drivers/video/backlight/jornada720_bl.c new file mode 100644 index 00000000000..6ce96b4a879 --- /dev/null +++ b/drivers/video/backlight/jornada720_bl.c @@ -0,0 +1,154 @@ +/* + * + * Backlight driver for HP Jornada 700 series (710/720/728) + * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 or any later version as published by the Free Software Foundation. + * + */ + +#include <linux/backlight.h> +#include <linux/device.h> +#include <linux/fb.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <mach/jornada720.h> +#include <mach/hardware.h> + +#include <video/s1d13xxxfb.h> + +#define BL_MAX_BRIGHT 255 +#define BL_DEF_BRIGHT 25 + +static int jornada_bl_get_brightness(struct backlight_device *bd) +{ + int ret; + + /* check if backlight is on */ + if (!(PPSR & PPC_LDD1)) + return 0; + + jornada_ssp_start(); + + /* cmd should return txdummy */ + ret = jornada_ssp_byte(GETBRIGHTNESS); + + if (jornada_ssp_byte(GETBRIGHTNESS) != TXDUMMY) { + dev_err(&bd->dev, "get brightness timeout\n"); + jornada_ssp_end(); + return -ETIMEDOUT; + } else { + /* exchange txdummy for value */ + ret = jornada_ssp_byte(TXDUMMY); + } + + jornada_ssp_end(); + + return BL_MAX_BRIGHT - ret; +} + +static int jornada_bl_update_status(struct backlight_device *bd) +{ + int ret = 0; + + jornada_ssp_start(); + + /* If backlight is off then really turn it off */ + if ((bd->props.power != FB_BLANK_UNBLANK) || (bd->props.fb_blank != FB_BLANK_UNBLANK)) { + ret = jornada_ssp_byte(BRIGHTNESSOFF); + if (ret != TXDUMMY) { + dev_info(&bd->dev, "brightness off timeout\n"); + /* turn off backlight */ + PPSR &= ~PPC_LDD1; + PPDR |= PPC_LDD1; + ret = -ETIMEDOUT; + } + } else /* turn on backlight */ + PPSR |= PPC_LDD1; + + /* send command to our mcu */ + if (jornada_ssp_byte(SETBRIGHTNESS) != TXDUMMY) { + dev_info(&bd->dev, "failed to set brightness\n"); + ret = -ETIMEDOUT; + goto out; + } + + /* + * at this point we expect that the mcu has accepted + * our command and is waiting for our new value + * please note that maximum brightness is 255, + * but due to physical layout it is equal to 0, so we simply + * invert the value (MAX VALUE - NEW VALUE). + */ + if (jornada_ssp_byte(BL_MAX_BRIGHT - bd->props.brightness) + != TXDUMMY) { + dev_err(&bd->dev, "set brightness failed\n"); + ret = -ETIMEDOUT; + } + + /* + * If infact we get an TXDUMMY as output we are happy and dont + * make any further comments about it + */ +out: + jornada_ssp_end(); + + return ret; +} + +static const struct backlight_ops jornada_bl_ops = { + .get_brightness = jornada_bl_get_brightness, + .update_status = jornada_bl_update_status, + .options = BL_CORE_SUSPENDRESUME, +}; + +static int jornada_bl_probe(struct platform_device *pdev) +{ + struct backlight_properties props; + int ret; + struct backlight_device *bd; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = BL_MAX_BRIGHT; + + bd = devm_backlight_device_register(&pdev->dev, S1D_DEVICENAME, + &pdev->dev, NULL, &jornada_bl_ops, + &props); + if (IS_ERR(bd)) { + ret = PTR_ERR(bd); + dev_err(&pdev->dev, "failed to register device, err=%x\n", ret); + return ret; + } + + bd->props.power = FB_BLANK_UNBLANK; + bd->props.brightness = BL_DEF_BRIGHT; + /* + * note. make sure max brightness is set otherwise + * you will get seemingly non-related errors when + * trying to change brightness + */ + jornada_bl_update_status(bd); + + platform_set_drvdata(pdev, bd); + dev_info(&pdev->dev, "HP Jornada 700 series backlight driver\n"); + + return 0; +} + +static struct platform_driver jornada_bl_driver = { + .probe = jornada_bl_probe, + .driver = { + .name = "jornada_bl", + }, +}; + +module_platform_driver(jornada_bl_driver); + +MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson>"); +MODULE_DESCRIPTION("HP Jornada 710/720/728 Backlight driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/jornada720_lcd.c b/drivers/video/backlight/jornada720_lcd.c new file mode 100644 index 00000000000..da3876c9b3a --- /dev/null +++ b/drivers/video/backlight/jornada720_lcd.c @@ -0,0 +1,134 @@ +/* + * + * LCD driver for HP Jornada 700 series (710/720/728) + * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 or any later version as published by the Free Software Foundation. + * + */ + +#include <linux/device.h> +#include <linux/fb.h> +#include <linux/kernel.h> +#include <linux/lcd.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/delay.h> + +#include <mach/jornada720.h> +#include <mach/hardware.h> + +#include <video/s1d13xxxfb.h> + +#define LCD_MAX_CONTRAST 0xff +#define LCD_DEF_CONTRAST 0x80 + +static int jornada_lcd_get_power(struct lcd_device *ld) +{ + /* LDD2 in PPC = LCD POWER */ + if (PPSR & PPC_LDD2) + return FB_BLANK_UNBLANK; /* PW ON */ + else + return FB_BLANK_POWERDOWN; /* PW OFF */ +} + +static int jornada_lcd_get_contrast(struct lcd_device *ld) +{ + int ret; + + if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK) + return 0; + + jornada_ssp_start(); + + if (jornada_ssp_byte(GETCONTRAST) != TXDUMMY) { + dev_err(&ld->dev, "get contrast failed\n"); + jornada_ssp_end(); + return -ETIMEDOUT; + } else { + ret = jornada_ssp_byte(TXDUMMY); + jornada_ssp_end(); + return ret; + } +} + +static int jornada_lcd_set_contrast(struct lcd_device *ld, int value) +{ + int ret; + + jornada_ssp_start(); + + /* start by sending our set contrast cmd to mcu */ + ret = jornada_ssp_byte(SETCONTRAST); + + /* push the new value */ + if (jornada_ssp_byte(value) != TXDUMMY) { + dev_err(&ld->dev, "set contrast failed\n"); + jornada_ssp_end(); + return -ETIMEDOUT; + } + + /* if we get here we can assume everything went well */ + jornada_ssp_end(); + + return 0; +} + +static int jornada_lcd_set_power(struct lcd_device *ld, int power) +{ + if (power != FB_BLANK_UNBLANK) { + PPSR &= ~PPC_LDD2; + PPDR |= PPC_LDD2; + } else { + PPSR |= PPC_LDD2; + } + + return 0; +} + +static struct lcd_ops jornada_lcd_props = { + .get_contrast = jornada_lcd_get_contrast, + .set_contrast = jornada_lcd_set_contrast, + .get_power = jornada_lcd_get_power, + .set_power = jornada_lcd_set_power, +}; + +static int jornada_lcd_probe(struct platform_device *pdev) +{ + struct lcd_device *lcd_device; + int ret; + + lcd_device = devm_lcd_device_register(&pdev->dev, S1D_DEVICENAME, + &pdev->dev, NULL, &jornada_lcd_props); + + if (IS_ERR(lcd_device)) { + ret = PTR_ERR(lcd_device); + dev_err(&pdev->dev, "failed to register device\n"); + return ret; + } + + platform_set_drvdata(pdev, lcd_device); + + /* lets set our default values */ + jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST); + jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK); + /* give it some time to startup */ + msleep(100); + + return 0; +} + +static struct platform_driver jornada_lcd_driver = { + .probe = jornada_lcd_probe, + .driver = { + .name = "jornada_lcd", + }, +}; + +module_platform_driver(jornada_lcd_driver); + +MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>"); +MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/kb3886_bl.c b/drivers/video/backlight/kb3886_bl.c new file mode 100644 index 00000000000..84a110a719c --- /dev/null +++ b/drivers/video/backlight/kb3886_bl.c @@ -0,0 +1,197 @@ +/* + * Backlight Driver for the KB3886 Backlight + * + * Copyright (c) 2007-2008 Claudio Nieder + * + * Based on corgi_bl.c by Richard Purdie and kb3886 driver by Robert Woerle + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/mutex.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/dmi.h> + +#define KB3886_PARENT 0x64 +#define KB3886_IO 0x60 +#define KB3886_ADC_DAC_PWM 0xC4 +#define KB3886_PWM0_WRITE 0x81 +#define KB3886_PWM0_READ 0x41 + +static DEFINE_MUTEX(bl_mutex); + +static void kb3886_bl_set_intensity(int intensity) +{ + mutex_lock(&bl_mutex); + intensity = intensity&0xff; + outb(KB3886_ADC_DAC_PWM, KB3886_PARENT); + usleep_range(10000, 11000); + outb(KB3886_PWM0_WRITE, KB3886_IO); + usleep_range(10000, 11000); + outb(intensity, KB3886_IO); + mutex_unlock(&bl_mutex); +} + +struct kb3886bl_machinfo { + int max_intensity; + int default_intensity; + int limit_mask; + void (*set_bl_intensity)(int intensity); +}; + +static struct kb3886bl_machinfo kb3886_bl_machinfo = { + .max_intensity = 0xff, + .default_intensity = 0xa0, + .limit_mask = 0x7f, + .set_bl_intensity = kb3886_bl_set_intensity, +}; + +static struct platform_device kb3886bl_device = { + .name = "kb3886-bl", + .dev = { + .platform_data = &kb3886_bl_machinfo, + }, + .id = -1, +}; + +static struct platform_device *devices[] __initdata = { + &kb3886bl_device, +}; + +/* + * Back to driver + */ + +static int kb3886bl_intensity; +static struct backlight_device *kb3886_backlight_device; +static struct kb3886bl_machinfo *bl_machinfo; + +static unsigned long kb3886bl_flags; +#define KB3886BL_SUSPENDED 0x01 + +static struct dmi_system_id kb3886bl_device_table[] __initdata = { + { + .ident = "Sahara Touch-iT", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SDV"), + DMI_MATCH(DMI_PRODUCT_NAME, "iTouch T201"), + }, + }, + { } +}; + +static int kb3886bl_send_intensity(struct backlight_device *bd) +{ + int intensity = bd->props.brightness; + + if (bd->props.power != FB_BLANK_UNBLANK) + intensity = 0; + if (bd->props.fb_blank != FB_BLANK_UNBLANK) + intensity = 0; + if (kb3886bl_flags & KB3886BL_SUSPENDED) + intensity = 0; + + bl_machinfo->set_bl_intensity(intensity); + + kb3886bl_intensity = intensity; + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int kb3886bl_suspend(struct device *dev) +{ + struct backlight_device *bd = dev_get_drvdata(dev); + + kb3886bl_flags |= KB3886BL_SUSPENDED; + backlight_update_status(bd); + return 0; +} + +static int kb3886bl_resume(struct device *dev) +{ + struct backlight_device *bd = dev_get_drvdata(dev); + + kb3886bl_flags &= ~KB3886BL_SUSPENDED; + backlight_update_status(bd); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(kb3886bl_pm_ops, kb3886bl_suspend, kb3886bl_resume); + +static int kb3886bl_get_intensity(struct backlight_device *bd) +{ + return kb3886bl_intensity; +} + +static const struct backlight_ops kb3886bl_ops = { + .get_brightness = kb3886bl_get_intensity, + .update_status = kb3886bl_send_intensity, +}; + +static int kb3886bl_probe(struct platform_device *pdev) +{ + struct backlight_properties props; + struct kb3886bl_machinfo *machinfo = dev_get_platdata(&pdev->dev); + + bl_machinfo = machinfo; + if (!machinfo->limit_mask) + machinfo->limit_mask = -1; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = machinfo->max_intensity; + kb3886_backlight_device = devm_backlight_device_register(&pdev->dev, + "kb3886-bl", &pdev->dev, + NULL, &kb3886bl_ops, + &props); + if (IS_ERR(kb3886_backlight_device)) + return PTR_ERR(kb3886_backlight_device); + + platform_set_drvdata(pdev, kb3886_backlight_device); + + kb3886_backlight_device->props.power = FB_BLANK_UNBLANK; + kb3886_backlight_device->props.brightness = machinfo->default_intensity; + backlight_update_status(kb3886_backlight_device); + + return 0; +} + +static struct platform_driver kb3886bl_driver = { + .probe = kb3886bl_probe, + .driver = { + .name = "kb3886-bl", + .pm = &kb3886bl_pm_ops, + }, +}; + +static int __init kb3886_init(void) +{ + if (!dmi_check_system(kb3886bl_device_table)) + return -ENODEV; + + platform_add_devices(devices, ARRAY_SIZE(devices)); + return platform_driver_register(&kb3886bl_driver); +} + +static void __exit kb3886_exit(void) +{ + platform_driver_unregister(&kb3886bl_driver); +} + +module_init(kb3886_init); +module_exit(kb3886_exit); + +MODULE_AUTHOR("Claudio Nieder <private@claudio.ch>"); +MODULE_DESCRIPTION("Tabletkiosk Sahara Touch-iT Backlight Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("dmi:*:svnSDV:pniTouchT201:*"); diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c new file mode 100644 index 00000000000..5fa2649c963 --- /dev/null +++ b/drivers/video/backlight/l4f00242t03.c @@ -0,0 +1,269 @@ +/* + * l4f00242t03.c -- support for Epson L4F00242T03 LCD + * + * Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved. + * + * Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com> + * Inspired by Marek Vasut work in l4f00242t03.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/gpio.h> +#include <linux/lcd.h> +#include <linux/slab.h> +#include <linux/regulator/consumer.h> + +#include <linux/spi/spi.h> +#include <linux/spi/l4f00242t03.h> + +struct l4f00242t03_priv { + struct spi_device *spi; + struct lcd_device *ld; + int lcd_state; + struct regulator *io_reg; + struct regulator *core_reg; +}; + +static void l4f00242t03_reset(unsigned int gpio) +{ + pr_debug("l4f00242t03_reset.\n"); + gpio_set_value(gpio, 1); + mdelay(100); + gpio_set_value(gpio, 0); + mdelay(10); /* tRES >= 100us */ + gpio_set_value(gpio, 1); + mdelay(20); +} + +#define param(x) ((x) | 0x100) + +static void l4f00242t03_lcd_init(struct spi_device *spi) +{ + struct l4f00242t03_pdata *pdata = dev_get_platdata(&spi->dev); + struct l4f00242t03_priv *priv = spi_get_drvdata(spi); + const u16 cmd[] = { 0x36, param(0), 0x3A, param(0x60) }; + int ret; + + dev_dbg(&spi->dev, "initializing LCD\n"); + + ret = regulator_set_voltage(priv->io_reg, 1800000, 1800000); + if (ret) { + dev_err(&spi->dev, "failed to set the IO regulator voltage.\n"); + return; + } + ret = regulator_enable(priv->io_reg); + if (ret) { + dev_err(&spi->dev, "failed to enable the IO regulator.\n"); + return; + } + + ret = regulator_set_voltage(priv->core_reg, 2800000, 2800000); + if (ret) { + dev_err(&spi->dev, "failed to set the core regulator voltage.\n"); + regulator_disable(priv->io_reg); + return; + } + ret = regulator_enable(priv->core_reg); + if (ret) { + dev_err(&spi->dev, "failed to enable the core regulator.\n"); + regulator_disable(priv->io_reg); + return; + } + + l4f00242t03_reset(pdata->reset_gpio); + + gpio_set_value(pdata->data_enable_gpio, 1); + msleep(60); + spi_write(spi, (const u8 *)cmd, ARRAY_SIZE(cmd) * sizeof(u16)); +} + +static void l4f00242t03_lcd_powerdown(struct spi_device *spi) +{ + struct l4f00242t03_pdata *pdata = dev_get_platdata(&spi->dev); + struct l4f00242t03_priv *priv = spi_get_drvdata(spi); + + dev_dbg(&spi->dev, "Powering down LCD\n"); + + gpio_set_value(pdata->data_enable_gpio, 0); + + regulator_disable(priv->io_reg); + regulator_disable(priv->core_reg); +} + +static int l4f00242t03_lcd_power_get(struct lcd_device *ld) +{ + struct l4f00242t03_priv *priv = lcd_get_data(ld); + + return priv->lcd_state; +} + +static int l4f00242t03_lcd_power_set(struct lcd_device *ld, int power) +{ + struct l4f00242t03_priv *priv = lcd_get_data(ld); + struct spi_device *spi = priv->spi; + + const u16 slpout = 0x11; + const u16 dison = 0x29; + + const u16 slpin = 0x10; + const u16 disoff = 0x28; + + if (power <= FB_BLANK_NORMAL) { + if (priv->lcd_state <= FB_BLANK_NORMAL) { + /* Do nothing, the LCD is running */ + } else if (priv->lcd_state < FB_BLANK_POWERDOWN) { + dev_dbg(&spi->dev, "Resuming LCD\n"); + + spi_write(spi, (const u8 *)&slpout, sizeof(u16)); + msleep(60); + spi_write(spi, (const u8 *)&dison, sizeof(u16)); + } else { + /* priv->lcd_state == FB_BLANK_POWERDOWN */ + l4f00242t03_lcd_init(spi); + priv->lcd_state = FB_BLANK_VSYNC_SUSPEND; + l4f00242t03_lcd_power_set(priv->ld, power); + } + } else if (power < FB_BLANK_POWERDOWN) { + if (priv->lcd_state <= FB_BLANK_NORMAL) { + /* Send the display in standby */ + dev_dbg(&spi->dev, "Standby the LCD\n"); + + spi_write(spi, (const u8 *)&disoff, sizeof(u16)); + msleep(60); + spi_write(spi, (const u8 *)&slpin, sizeof(u16)); + } else if (priv->lcd_state < FB_BLANK_POWERDOWN) { + /* Do nothing, the LCD is already in standby */ + } else { + /* priv->lcd_state == FB_BLANK_POWERDOWN */ + l4f00242t03_lcd_init(spi); + priv->lcd_state = FB_BLANK_UNBLANK; + l4f00242t03_lcd_power_set(ld, power); + } + } else { + /* power == FB_BLANK_POWERDOWN */ + if (priv->lcd_state != FB_BLANK_POWERDOWN) { + /* Clear the screen before shutting down */ + spi_write(spi, (const u8 *)&disoff, sizeof(u16)); + msleep(60); + l4f00242t03_lcd_powerdown(spi); + } + } + + priv->lcd_state = power; + + return 0; +} + +static struct lcd_ops l4f_ops = { + .set_power = l4f00242t03_lcd_power_set, + .get_power = l4f00242t03_lcd_power_get, +}; + +static int l4f00242t03_probe(struct spi_device *spi) +{ + struct l4f00242t03_priv *priv; + struct l4f00242t03_pdata *pdata = dev_get_platdata(&spi->dev); + int ret; + + if (pdata == NULL) { + dev_err(&spi->dev, "Uninitialized platform data.\n"); + return -EINVAL; + } + + priv = devm_kzalloc(&spi->dev, sizeof(struct l4f00242t03_priv), + GFP_KERNEL); + if (priv == NULL) + return -ENOMEM; + + spi_set_drvdata(spi, priv); + spi->bits_per_word = 9; + spi_setup(spi); + + priv->spi = spi; + + ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio, + GPIOF_OUT_INIT_HIGH, "lcd l4f00242t03 reset"); + if (ret) { + dev_err(&spi->dev, + "Unable to get the lcd l4f00242t03 reset gpio.\n"); + return ret; + } + + ret = devm_gpio_request_one(&spi->dev, pdata->data_enable_gpio, + GPIOF_OUT_INIT_LOW, "lcd l4f00242t03 data enable"); + if (ret) { + dev_err(&spi->dev, + "Unable to get the lcd l4f00242t03 data en gpio.\n"); + return ret; + } + + priv->io_reg = devm_regulator_get(&spi->dev, "vdd"); + if (IS_ERR(priv->io_reg)) { + dev_err(&spi->dev, "%s: Unable to get the IO regulator\n", + __func__); + return PTR_ERR(priv->io_reg); + } + + priv->core_reg = devm_regulator_get(&spi->dev, "vcore"); + if (IS_ERR(priv->core_reg)) { + dev_err(&spi->dev, "%s: Unable to get the core regulator\n", + __func__); + return PTR_ERR(priv->core_reg); + } + + priv->ld = devm_lcd_device_register(&spi->dev, "l4f00242t03", &spi->dev, + priv, &l4f_ops); + if (IS_ERR(priv->ld)) + return PTR_ERR(priv->ld); + + /* Init the LCD */ + l4f00242t03_lcd_init(spi); + priv->lcd_state = FB_BLANK_VSYNC_SUSPEND; + l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_UNBLANK); + + dev_info(&spi->dev, "Epson l4f00242t03 lcd probed.\n"); + + return 0; +} + +static int l4f00242t03_remove(struct spi_device *spi) +{ + struct l4f00242t03_priv *priv = spi_get_drvdata(spi); + + l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_POWERDOWN); + return 0; +} + +static void l4f00242t03_shutdown(struct spi_device *spi) +{ + struct l4f00242t03_priv *priv = spi_get_drvdata(spi); + + if (priv) + l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_POWERDOWN); + +} + +static struct spi_driver l4f00242t03_driver = { + .driver = { + .name = "l4f00242t03", + .owner = THIS_MODULE, + }, + .probe = l4f00242t03_probe, + .remove = l4f00242t03_remove, + .shutdown = l4f00242t03_shutdown, +}; + +module_spi_driver(l4f00242t03_driver); + +MODULE_AUTHOR("Alberto Panizzo <maramaopercheseimorto@gmail.com>"); +MODULE_DESCRIPTION("EPSON L4F00242T03 LCD"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c index b15b2b84a6f..7de847df224 100644 --- a/drivers/video/backlight/lcd.c +++ b/drivers/video/backlight/lcd.c @@ -5,6 +5,8 @@ * */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/module.h> #include <linux/init.h> #include <linux/device.h> @@ -13,6 +15,7 @@ #include <linux/ctype.h> #include <linux/err.h> #include <linux/fb.h> +#include <linux/slab.h> #if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \ defined(CONFIG_LCD_CLASS_DEVICE_MODULE)) @@ -27,21 +30,46 @@ static int fb_notifier_callback(struct notifier_block *self, struct fb_event *evdata = data; /* If we aren't interested in this event, skip it immediately ... */ - if (event != FB_EVENT_BLANK) + switch (event) { + case FB_EVENT_BLANK: + case FB_EVENT_MODE_CHANGE: + case FB_EVENT_MODE_CHANGE_ALL: + case FB_EARLY_EVENT_BLANK: + case FB_R_EARLY_EVENT_BLANK: + break; + default: return 0; + } ld = container_of(self, struct lcd_device, fb_notif); + if (!ld->ops) + return 0; + mutex_lock(&ld->ops_lock); - if (ld->ops) - if (!ld->ops->check_fb || ld->ops->check_fb(ld, evdata->info)) - ld->ops->set_power(ld, *(int *)evdata->data); + if (!ld->ops->check_fb || ld->ops->check_fb(ld, evdata->info)) { + if (event == FB_EVENT_BLANK) { + if (ld->ops->set_power) + ld->ops->set_power(ld, *(int *)evdata->data); + } else if (event == FB_EARLY_EVENT_BLANK) { + if (ld->ops->early_set_power) + ld->ops->early_set_power(ld, + *(int *)evdata->data); + } else if (event == FB_R_EARLY_EVENT_BLANK) { + if (ld->ops->r_early_set_power) + ld->ops->r_early_set_power(ld, + *(int *)evdata->data); + } else { + if (ld->ops->set_mode) + ld->ops->set_mode(ld, evdata->data); + } + } mutex_unlock(&ld->ops_lock); return 0; } static int lcd_register_fb(struct lcd_device *ld) { - memset(&ld->fb_notif, 0, sizeof(&ld->fb_notif)); + memset(&ld->fb_notif, 0, sizeof(ld->fb_notif)); ld->fb_notif.notifier_call = fb_notifier_callback; return fb_register_client(&ld->fb_notif); } @@ -61,7 +89,7 @@ static inline void lcd_unregister_fb(struct lcd_device *ld) } #endif /* CONFIG_FB */ -static ssize_t lcd_show_power(struct device *dev, struct device_attribute *attr, +static ssize_t lcd_power_show(struct device *dev, struct device_attribute *attr, char *buf) { int rc; @@ -77,23 +105,22 @@ static ssize_t lcd_show_power(struct device *dev, struct device_attribute *attr, return rc; } -static ssize_t lcd_store_power(struct device *dev, +static ssize_t lcd_power_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - int rc = -ENXIO; - char *endp; + int rc; struct lcd_device *ld = to_lcd_device(dev); - int power = simple_strtoul(buf, &endp, 0); - size_t size = endp - buf; + unsigned long power; + + rc = kstrtoul(buf, 0, &power); + if (rc) + return rc; - if (*endp && isspace(*endp)) - size++; - if (size != count) - return -EINVAL; + rc = -ENXIO; mutex_lock(&ld->ops_lock); if (ld->ops && ld->ops->set_power) { - pr_debug("lcd: set power to %d\n", power); + pr_debug("set power to %lu\n", power); ld->ops->set_power(ld, power); rc = count; } @@ -101,8 +128,9 @@ static ssize_t lcd_store_power(struct device *dev, return rc; } +static DEVICE_ATTR_RW(lcd_power); -static ssize_t lcd_show_contrast(struct device *dev, +static ssize_t contrast_show(struct device *dev, struct device_attribute *attr, char *buf) { int rc = -ENXIO; @@ -116,23 +144,22 @@ static ssize_t lcd_show_contrast(struct device *dev, return rc; } -static ssize_t lcd_store_contrast(struct device *dev, +static ssize_t contrast_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - int rc = -ENXIO; - char *endp; + int rc; struct lcd_device *ld = to_lcd_device(dev); - int contrast = simple_strtoul(buf, &endp, 0); - size_t size = endp - buf; + unsigned long contrast; + + rc = kstrtoul(buf, 0, &contrast); + if (rc) + return rc; - if (*endp && isspace(*endp)) - size++; - if (size != count) - return -EINVAL; + rc = -ENXIO; mutex_lock(&ld->ops_lock); if (ld->ops && ld->ops->set_contrast) { - pr_debug("lcd: set contrast to %d\n", contrast); + pr_debug("set contrast to %lu\n", contrast); ld->ops->set_contrast(ld, contrast); rc = count; } @@ -140,14 +167,16 @@ static ssize_t lcd_store_contrast(struct device *dev, return rc; } +static DEVICE_ATTR_RW(contrast); -static ssize_t lcd_show_max_contrast(struct device *dev, +static ssize_t max_contrast_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lcd_device *ld = to_lcd_device(dev); return sprintf(buf, "%d\n", ld->props.max_contrast); } +static DEVICE_ATTR_RO(max_contrast); static struct class *lcd_class; @@ -157,12 +186,13 @@ static void lcd_device_release(struct device *dev) kfree(ld); } -static struct device_attribute lcd_device_attributes[] = { - __ATTR(lcd_power, 0644, lcd_show_power, lcd_store_power), - __ATTR(contrast, 0644, lcd_show_contrast, lcd_store_contrast), - __ATTR(max_contrast, 0444, lcd_show_max_contrast, NULL), - __ATTR_NULL, +static struct attribute *lcd_device_attrs[] = { + &dev_attr_lcd_power.attr, + &dev_attr_contrast.attr, + &dev_attr_max_contrast.attr, + NULL, }; +ATTRIBUTE_GROUPS(lcd_device); /** * lcd_device_register - register a new object of lcd_device class. @@ -193,12 +223,12 @@ struct lcd_device *lcd_device_register(const char *name, struct device *parent, new_ld->dev.class = lcd_class; new_ld->dev.parent = parent; new_ld->dev.release = lcd_device_release; - strlcpy(new_ld->dev.bus_id, name, BUS_ID_SIZE); + dev_set_name(&new_ld->dev, "%s", name); dev_set_drvdata(&new_ld->dev, devdata); rc = device_register(&new_ld->dev); if (rc) { - kfree(new_ld); + put_device(&new_ld->dev); return ERR_PTR(rc); } @@ -234,6 +264,76 @@ void lcd_device_unregister(struct lcd_device *ld) } EXPORT_SYMBOL(lcd_device_unregister); +static void devm_lcd_device_release(struct device *dev, void *res) +{ + struct lcd_device *lcd = *(struct lcd_device **)res; + + lcd_device_unregister(lcd); +} + +static int devm_lcd_device_match(struct device *dev, void *res, void *data) +{ + struct lcd_device **r = res; + + return *r == data; +} + +/** + * devm_lcd_device_register - resource managed lcd_device_register() + * @dev: the device to register + * @name: the name of the device + * @parent: a pointer to the parent device + * @devdata: an optional pointer to be stored for private driver use + * @ops: the lcd operations structure + * + * @return a struct lcd on success, or an ERR_PTR on error + * + * Managed lcd_device_register(). The lcd_device returned from this function + * are automatically freed on driver detach. See lcd_device_register() + * for more information. + */ +struct lcd_device *devm_lcd_device_register(struct device *dev, + const char *name, struct device *parent, + void *devdata, struct lcd_ops *ops) +{ + struct lcd_device **ptr, *lcd; + + ptr = devres_alloc(devm_lcd_device_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + lcd = lcd_device_register(name, parent, devdata, ops); + if (!IS_ERR(lcd)) { + *ptr = lcd; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return lcd; +} +EXPORT_SYMBOL(devm_lcd_device_register); + +/** + * devm_lcd_device_unregister - resource managed lcd_device_unregister() + * @dev: the device to unregister + * @ld: the lcd device to unregister + * + * Deallocated a lcd allocated with devm_lcd_device_register(). Normally + * this function will not need to be called and the resource management + * code will ensure that the resource is freed. + */ +void devm_lcd_device_unregister(struct device *dev, struct lcd_device *ld) +{ + int rc; + + rc = devres_release(dev, devm_lcd_device_release, + devm_lcd_device_match, ld); + WARN_ON(rc); +} +EXPORT_SYMBOL(devm_lcd_device_unregister); + + static void __exit lcd_class_exit(void) { class_destroy(lcd_class); @@ -243,12 +343,12 @@ static int __init lcd_class_init(void) { lcd_class = class_create(THIS_MODULE, "lcd"); if (IS_ERR(lcd_class)) { - printk(KERN_WARNING "Unable to create backlight class; errno = %ld\n", - PTR_ERR(lcd_class)); + pr_warn("Unable to create backlight class; errno = %ld\n", + PTR_ERR(lcd_class)); return PTR_ERR(lcd_class); } - lcd_class->dev_attrs = lcd_device_attributes; + lcd_class->dev_groups = lcd_device_groups; return 0; } diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c new file mode 100644 index 00000000000..506a6c23603 --- /dev/null +++ b/drivers/video/backlight/ld9040.c @@ -0,0 +1,818 @@ +/* + * ld9040 AMOLED LCD panel driver. + * + * Copyright (c) 2011 Samsung Electronics + * Author: Donghwa Lee <dh09.lee@samsung.com> + * Derived from drivers/video/backlight/s6e63m0.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/lcd.h> +#include <linux/module.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> +#include <linux/wait.h> + +#include "ld9040_gamma.h" + +#define SLEEPMSEC 0x1000 +#define ENDDEF 0x2000 +#define DEFMASK 0xFF00 +#define COMMAND_ONLY 0xFE +#define DATA_ONLY 0xFF + +#define MIN_BRIGHTNESS 0 +#define MAX_BRIGHTNESS 24 + +struct ld9040 { + struct device *dev; + struct spi_device *spi; + unsigned int power; + unsigned int current_brightness; + + struct lcd_device *ld; + struct backlight_device *bd; + struct lcd_platform_data *lcd_pd; + + struct mutex lock; + bool enabled; +}; + +static struct regulator_bulk_data supplies[] = { + { .supply = "vdd3", }, + { .supply = "vci", }, +}; + +static void ld9040_regulator_enable(struct ld9040 *lcd) +{ + int ret = 0; + struct lcd_platform_data *pd = NULL; + + pd = lcd->lcd_pd; + mutex_lock(&lcd->lock); + if (!lcd->enabled) { + ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies); + if (ret) + goto out; + + lcd->enabled = true; + } + msleep(pd->power_on_delay); +out: + mutex_unlock(&lcd->lock); +} + +static void ld9040_regulator_disable(struct ld9040 *lcd) +{ + int ret = 0; + + mutex_lock(&lcd->lock); + if (lcd->enabled) { + ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies); + if (ret) + goto out; + + lcd->enabled = false; + } +out: + mutex_unlock(&lcd->lock); +} + +static const unsigned short seq_swreset[] = { + 0x01, COMMAND_ONLY, + ENDDEF, 0x00 +}; + +static const unsigned short seq_user_setting[] = { + 0xF0, 0x5A, + + DATA_ONLY, 0x5A, + ENDDEF, 0x00 +}; + +static const unsigned short seq_elvss_on[] = { + 0xB1, 0x0D, + + DATA_ONLY, 0x00, + DATA_ONLY, 0x16, + ENDDEF, 0x00 +}; + +static const unsigned short seq_gtcon[] = { + 0xF7, 0x09, + + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + ENDDEF, 0x00 +}; + +static const unsigned short seq_panel_condition[] = { + 0xF8, 0x05, + + DATA_ONLY, 0x65, + DATA_ONLY, 0x96, + DATA_ONLY, 0x71, + DATA_ONLY, 0x7D, + DATA_ONLY, 0x19, + DATA_ONLY, 0x3B, + DATA_ONLY, 0x0D, + DATA_ONLY, 0x19, + DATA_ONLY, 0x7E, + DATA_ONLY, 0x0D, + DATA_ONLY, 0xE2, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x7E, + DATA_ONLY, 0x7D, + DATA_ONLY, 0x07, + DATA_ONLY, 0x07, + DATA_ONLY, 0x20, + DATA_ONLY, 0x20, + DATA_ONLY, 0x20, + DATA_ONLY, 0x02, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_gamma_set1[] = { + 0xF9, 0x00, + + DATA_ONLY, 0xA7, + DATA_ONLY, 0xB4, + DATA_ONLY, 0xAE, + DATA_ONLY, 0xBF, + DATA_ONLY, 0x00, + DATA_ONLY, 0x91, + DATA_ONLY, 0x00, + DATA_ONLY, 0xB2, + DATA_ONLY, 0xB4, + DATA_ONLY, 0xAA, + DATA_ONLY, 0xBB, + DATA_ONLY, 0x00, + DATA_ONLY, 0xAC, + DATA_ONLY, 0x00, + DATA_ONLY, 0xB3, + DATA_ONLY, 0xB1, + DATA_ONLY, 0xAA, + DATA_ONLY, 0xBC, + DATA_ONLY, 0x00, + DATA_ONLY, 0xB3, + ENDDEF, 0x00 +}; + +static const unsigned short seq_gamma_ctrl[] = { + 0xFB, 0x02, + + DATA_ONLY, 0x5A, + ENDDEF, 0x00 +}; + +static const unsigned short seq_gamma_start[] = { + 0xF9, COMMAND_ONLY, + + ENDDEF, 0x00 +}; + +static const unsigned short seq_apon[] = { + 0xF3, 0x00, + + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x0A, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_display_ctrl[] = { + 0xF2, 0x02, + + DATA_ONLY, 0x08, + DATA_ONLY, 0x08, + DATA_ONLY, 0x10, + DATA_ONLY, 0x10, + ENDDEF, 0x00 +}; + +static const unsigned short seq_manual_pwr[] = { + 0xB0, 0x04, + ENDDEF, 0x00 +}; + +static const unsigned short seq_pwr_ctrl[] = { + 0xF4, 0x0A, + + DATA_ONLY, 0x87, + DATA_ONLY, 0x25, + DATA_ONLY, 0x6A, + DATA_ONLY, 0x44, + DATA_ONLY, 0x02, + DATA_ONLY, 0x88, + ENDDEF, 0x00 +}; + +static const unsigned short seq_sleep_out[] = { + 0x11, COMMAND_ONLY, + ENDDEF, 0x00 +}; + +static const unsigned short seq_sleep_in[] = { + 0x10, COMMAND_ONLY, + ENDDEF, 0x00 +}; + +static const unsigned short seq_display_on[] = { + 0x29, COMMAND_ONLY, + ENDDEF, 0x00 +}; + +static const unsigned short seq_display_off[] = { + 0x28, COMMAND_ONLY, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vci1_1st_en[] = { + 0xF3, 0x10, + + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vl1_en[] = { + 0xF3, 0x11, + + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vl2_en[] = { + 0xF3, 0x13, + + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vci1_2nd_en[] = { + 0xF3, 0x33, + + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vl3_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vreg1_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0x01, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vgh_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0x11, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vgl_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0x31, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x02, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vmos_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xB1, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vint_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xF1, + /* DATA_ONLY, 0x71, VMOS/VBL/VBH not used */ + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */ + ENDDEF, 0x00 +}; + +static const unsigned short seq_vbh_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xF9, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + ENDDEF, 0x00 +}; + +static const unsigned short seq_vbl_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xFD, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + ENDDEF, 0x00 +}; + +static const unsigned short seq_gam_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xFF, + /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */ + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */ + ENDDEF, 0x00 +}; + +static const unsigned short seq_sd_amp_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xFF, + /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */ + DATA_ONLY, 0x80, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */ + ENDDEF, 0x00 +}; + +static const unsigned short seq_gls_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xFF, + /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */ + DATA_ONLY, 0x81, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */ + ENDDEF, 0x00 +}; + +static const unsigned short seq_els_en[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xFF, + /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */ + DATA_ONLY, 0x83, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */ + ENDDEF, 0x00 +}; + +static const unsigned short seq_el_on[] = { + 0xF3, 0x37, + + DATA_ONLY, 0xFF, + /* DATA_ONLY, 0x73, VMOS/VBL/VBH not used */ + DATA_ONLY, 0x87, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + /* DATA_ONLY, 0x02, VMOS/VBL/VBH not used */ + ENDDEF, 0x00 +}; + +static int ld9040_spi_write_byte(struct ld9040 *lcd, int addr, int data) +{ + u16 buf[1]; + struct spi_message msg; + + struct spi_transfer xfer = { + .len = 2, + .tx_buf = buf, + }; + + buf[0] = (addr << 8) | data; + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + return spi_sync(lcd->spi, &msg); +} + +static int ld9040_spi_write(struct ld9040 *lcd, unsigned char address, + unsigned char command) +{ + int ret = 0; + + if (address != DATA_ONLY) + ret = ld9040_spi_write_byte(lcd, 0x0, address); + if (command != COMMAND_ONLY) + ret = ld9040_spi_write_byte(lcd, 0x1, command); + + return ret; +} + +static int ld9040_panel_send_sequence(struct ld9040 *lcd, + const unsigned short *wbuf) +{ + int ret = 0, i = 0; + + while ((wbuf[i] & DEFMASK) != ENDDEF) { + if ((wbuf[i] & DEFMASK) != SLEEPMSEC) { + ret = ld9040_spi_write(lcd, wbuf[i], wbuf[i+1]); + if (ret) + break; + } else { + msleep(wbuf[i+1]); + } + i += 2; + } + + return ret; +} + +static int _ld9040_gamma_ctl(struct ld9040 *lcd, const unsigned int *gamma) +{ + unsigned int i = 0; + int ret = 0; + + /* start gamma table updating. */ + ret = ld9040_panel_send_sequence(lcd, seq_gamma_start); + if (ret) { + dev_err(lcd->dev, "failed to disable gamma table updating.\n"); + goto gamma_err; + } + + for (i = 0 ; i < GAMMA_TABLE_COUNT; i++) { + ret = ld9040_spi_write(lcd, DATA_ONLY, gamma[i]); + if (ret) { + dev_err(lcd->dev, "failed to set gamma table.\n"); + goto gamma_err; + } + } + + /* update gamma table. */ + ret = ld9040_panel_send_sequence(lcd, seq_gamma_ctrl); + if (ret) + dev_err(lcd->dev, "failed to update gamma table.\n"); + +gamma_err: + return ret; +} + +static int ld9040_gamma_ctl(struct ld9040 *lcd, int gamma) +{ + return _ld9040_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]); +} + +static int ld9040_ldi_init(struct ld9040 *lcd) +{ + int ret, i; + static const unsigned short *init_seq[] = { + seq_user_setting, + seq_panel_condition, + seq_display_ctrl, + seq_manual_pwr, + seq_elvss_on, + seq_gtcon, + seq_gamma_set1, + seq_gamma_ctrl, + seq_sleep_out, + }; + + for (i = 0; i < ARRAY_SIZE(init_seq); i++) { + ret = ld9040_panel_send_sequence(lcd, init_seq[i]); + /* workaround: minimum delay time for transferring CMD */ + usleep_range(300, 310); + if (ret) + break; + } + + return ret; +} + +static int ld9040_ldi_enable(struct ld9040 *lcd) +{ + return ld9040_panel_send_sequence(lcd, seq_display_on); +} + +static int ld9040_ldi_disable(struct ld9040 *lcd) +{ + int ret; + + ret = ld9040_panel_send_sequence(lcd, seq_display_off); + ret = ld9040_panel_send_sequence(lcd, seq_sleep_in); + + return ret; +} + +static int ld9040_power_is_on(int power) +{ + return power <= FB_BLANK_NORMAL; +} + +static int ld9040_power_on(struct ld9040 *lcd) +{ + int ret = 0; + struct lcd_platform_data *pd; + + pd = lcd->lcd_pd; + + /* lcd power on */ + ld9040_regulator_enable(lcd); + + if (!pd->reset) { + dev_err(lcd->dev, "reset is NULL.\n"); + return -EINVAL; + } else { + pd->reset(lcd->ld); + msleep(pd->reset_delay); + } + + ret = ld9040_ldi_init(lcd); + if (ret) { + dev_err(lcd->dev, "failed to initialize ldi.\n"); + return ret; + } + + ret = ld9040_ldi_enable(lcd); + if (ret) { + dev_err(lcd->dev, "failed to enable ldi.\n"); + return ret; + } + + return 0; +} + +static int ld9040_power_off(struct ld9040 *lcd) +{ + int ret; + struct lcd_platform_data *pd; + + pd = lcd->lcd_pd; + + ret = ld9040_ldi_disable(lcd); + if (ret) { + dev_err(lcd->dev, "lcd setting failed.\n"); + return -EIO; + } + + msleep(pd->power_off_delay); + + /* lcd power off */ + ld9040_regulator_disable(lcd); + + return 0; +} + +static int ld9040_power(struct ld9040 *lcd, int power) +{ + int ret = 0; + + if (ld9040_power_is_on(power) && !ld9040_power_is_on(lcd->power)) + ret = ld9040_power_on(lcd); + else if (!ld9040_power_is_on(power) && ld9040_power_is_on(lcd->power)) + ret = ld9040_power_off(lcd); + + if (!ret) + lcd->power = power; + + return ret; +} + +static int ld9040_set_power(struct lcd_device *ld, int power) +{ + struct ld9040 *lcd = lcd_get_data(ld); + + if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && + power != FB_BLANK_NORMAL) { + dev_err(lcd->dev, "power value should be 0, 1 or 4.\n"); + return -EINVAL; + } + + return ld9040_power(lcd, power); +} + +static int ld9040_get_power(struct lcd_device *ld) +{ + struct ld9040 *lcd = lcd_get_data(ld); + + return lcd->power; +} + +static int ld9040_get_brightness(struct backlight_device *bd) +{ + return bd->props.brightness; +} + +static int ld9040_set_brightness(struct backlight_device *bd) +{ + int ret = 0, brightness = bd->props.brightness; + struct ld9040 *lcd = bl_get_data(bd); + + if (brightness < MIN_BRIGHTNESS || + brightness > bd->props.max_brightness) { + dev_err(&bd->dev, "lcd brightness should be %d to %d.\n", + MIN_BRIGHTNESS, MAX_BRIGHTNESS); + return -EINVAL; + } + + ret = ld9040_gamma_ctl(lcd, bd->props.brightness); + if (ret) { + dev_err(&bd->dev, "lcd brightness setting failed.\n"); + return -EIO; + } + + return ret; +} + +static struct lcd_ops ld9040_lcd_ops = { + .set_power = ld9040_set_power, + .get_power = ld9040_get_power, +}; + +static const struct backlight_ops ld9040_backlight_ops = { + .get_brightness = ld9040_get_brightness, + .update_status = ld9040_set_brightness, +}; + +static int ld9040_probe(struct spi_device *spi) +{ + int ret = 0; + struct ld9040 *lcd = NULL; + struct lcd_device *ld = NULL; + struct backlight_device *bd = NULL; + struct backlight_properties props; + + lcd = devm_kzalloc(&spi->dev, sizeof(struct ld9040), GFP_KERNEL); + if (!lcd) + return -ENOMEM; + + /* ld9040 lcd panel uses 3-wire 9bits SPI Mode. */ + spi->bits_per_word = 9; + + ret = spi_setup(spi); + if (ret < 0) { + dev_err(&spi->dev, "spi setup failed.\n"); + return ret; + } + + lcd->spi = spi; + lcd->dev = &spi->dev; + + lcd->lcd_pd = dev_get_platdata(&spi->dev); + if (!lcd->lcd_pd) { + dev_err(&spi->dev, "platform data is NULL.\n"); + return -EINVAL; + } + + mutex_init(&lcd->lock); + + ret = devm_regulator_bulk_get(lcd->dev, ARRAY_SIZE(supplies), supplies); + if (ret) { + dev_err(lcd->dev, "Failed to get regulators: %d\n", ret); + return ret; + } + + ld = devm_lcd_device_register(&spi->dev, "ld9040", &spi->dev, lcd, + &ld9040_lcd_ops); + if (IS_ERR(ld)) + return PTR_ERR(ld); + + lcd->ld = ld; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = MAX_BRIGHTNESS; + + bd = devm_backlight_device_register(&spi->dev, "ld9040-bl", &spi->dev, + lcd, &ld9040_backlight_ops, &props); + if (IS_ERR(bd)) + return PTR_ERR(bd); + + bd->props.brightness = MAX_BRIGHTNESS; + lcd->bd = bd; + + /* + * if lcd panel was on from bootloader like u-boot then + * do not lcd on. + */ + if (!lcd->lcd_pd->lcd_enabled) { + /* + * if lcd panel was off from bootloader then + * current lcd status is powerdown and then + * it enables lcd panel. + */ + lcd->power = FB_BLANK_POWERDOWN; + + ld9040_power(lcd, FB_BLANK_UNBLANK); + } else { + lcd->power = FB_BLANK_UNBLANK; + } + + spi_set_drvdata(spi, lcd); + + dev_info(&spi->dev, "ld9040 panel driver has been probed.\n"); + return 0; +} + +static int ld9040_remove(struct spi_device *spi) +{ + struct ld9040 *lcd = spi_get_drvdata(spi); + + ld9040_power(lcd, FB_BLANK_POWERDOWN); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int ld9040_suspend(struct device *dev) +{ + struct ld9040 *lcd = dev_get_drvdata(dev); + + dev_dbg(dev, "lcd->power = %d\n", lcd->power); + + /* + * when lcd panel is suspend, lcd panel becomes off + * regardless of status. + */ + return ld9040_power(lcd, FB_BLANK_POWERDOWN); +} + +static int ld9040_resume(struct device *dev) +{ + struct ld9040 *lcd = dev_get_drvdata(dev); + + lcd->power = FB_BLANK_POWERDOWN; + + return ld9040_power(lcd, FB_BLANK_UNBLANK); +} +#endif + +static SIMPLE_DEV_PM_OPS(ld9040_pm_ops, ld9040_suspend, ld9040_resume); + +/* Power down all displays on reboot, poweroff or halt. */ +static void ld9040_shutdown(struct spi_device *spi) +{ + struct ld9040 *lcd = spi_get_drvdata(spi); + + ld9040_power(lcd, FB_BLANK_POWERDOWN); +} + +static struct spi_driver ld9040_driver = { + .driver = { + .name = "ld9040", + .owner = THIS_MODULE, + .pm = &ld9040_pm_ops, + }, + .probe = ld9040_probe, + .remove = ld9040_remove, + .shutdown = ld9040_shutdown, +}; + +module_spi_driver(ld9040_driver); + +MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>"); +MODULE_DESCRIPTION("ld9040 LCD Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/ld9040_gamma.h b/drivers/video/backlight/ld9040_gamma.h new file mode 100644 index 00000000000..c5e586d9738 --- /dev/null +++ b/drivers/video/backlight/ld9040_gamma.h @@ -0,0 +1,202 @@ +/* + * Gamma level definitions. + * + * Copyright (c) 2011 Samsung Electronics + * InKi Dae <inki.dae@samsung.com> + * Donghwa Lee <dh09.lee@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#ifndef _LD9040_BRIGHTNESS_H +#define _LD9040_BRIGHTNESS_H + +#define MAX_GAMMA_LEVEL 25 +#define GAMMA_TABLE_COUNT 21 + +/* gamma value: 2.2 */ +static const unsigned int ld9040_22_300[] = { + 0x00, 0xa7, 0xb4, 0xae, 0xbf, 0x00, 0x91, + 0x00, 0xb2, 0xb4, 0xaa, 0xbb, 0x00, 0xac, + 0x00, 0xb3, 0xb1, 0xaa, 0xbc, 0x00, 0xb3 +}; + +static const unsigned int ld9040_22_290[] = { + 0x00, 0xa9, 0xb7, 0xae, 0xbd, 0x00, 0x89, + 0x00, 0xb7, 0xb6, 0xa8, 0xba, 0x00, 0xa4, + 0x00, 0xb1, 0xb4, 0xaa, 0xbb, 0x00, 0xaa +}; + +static const unsigned int ld9040_22_280[] = { + 0x00, 0xa9, 0xb6, 0xad, 0xbf, 0x00, 0x86, + 0x00, 0xb8, 0xb5, 0xa8, 0xbc, 0x00, 0xa0, + 0x00, 0xb3, 0xb3, 0xa9, 0xbc, 0x00, 0xa7 +}; + +static const unsigned int ld9040_22_270[] = { + 0x00, 0xa8, 0xb8, 0xae, 0xbe, 0x00, 0x84, + 0x00, 0xb9, 0xb7, 0xa8, 0xbc, 0x00, 0x9d, + 0x00, 0xb2, 0xb5, 0xaa, 0xbc, 0x00, 0xa4 + +}; +static const unsigned int ld9040_22_260[] = { + 0x00, 0xa4, 0xb8, 0xb0, 0xbf, 0x00, 0x80, + 0x00, 0xb8, 0xb6, 0xaa, 0xbc, 0x00, 0x9a, + 0x00, 0xb0, 0xb5, 0xab, 0xbd, 0x00, 0xa0 +}; + +static const unsigned int ld9040_22_250[] = { + 0x00, 0xa4, 0xb9, 0xaf, 0xc1, 0x00, 0x7d, + 0x00, 0xb9, 0xb6, 0xaa, 0xbb, 0x00, 0x97, + 0x00, 0xb1, 0xb5, 0xaa, 0xbf, 0x00, 0x9d +}; + +static const unsigned int ld9040_22_240[] = { + 0x00, 0xa2, 0xb9, 0xaf, 0xc2, 0x00, 0x7a, + 0x00, 0xb9, 0xb7, 0xaa, 0xbd, 0x00, 0x94, + 0x00, 0xb0, 0xb5, 0xab, 0xbf, 0x00, 0x9a +}; + +static const unsigned int ld9040_22_230[] = { + 0x00, 0xa0, 0xb9, 0xaf, 0xc3, 0x00, 0x77, + 0x00, 0xb9, 0xb7, 0xab, 0xbe, 0x00, 0x90, + 0x00, 0xb0, 0xb6, 0xab, 0xbf, 0x00, 0x97 +}; + +static const unsigned int ld9040_22_220[] = { + 0x00, 0x9e, 0xba, 0xb0, 0xc2, 0x00, 0x75, + 0x00, 0xb9, 0xb8, 0xab, 0xbe, 0x00, 0x8e, + 0x00, 0xb0, 0xb6, 0xac, 0xbf, 0x00, 0x94 +}; + +static const unsigned int ld9040_22_210[] = { + 0x00, 0x9c, 0xb9, 0xb0, 0xc4, 0x00, 0x72, + 0x00, 0xb8, 0xb8, 0xac, 0xbf, 0x00, 0x8a, + 0x00, 0xb0, 0xb6, 0xac, 0xc0, 0x00, 0x91 +}; + +static const unsigned int ld9040_22_200[] = { + 0x00, 0x9a, 0xba, 0xb1, 0xc4, 0x00, 0x6f, + 0x00, 0xb8, 0xb8, 0xad, 0xc0, 0x00, 0x86, + 0x00, 0xb0, 0xb7, 0xad, 0xc0, 0x00, 0x8d +}; + +static const unsigned int ld9040_22_190[] = { + 0x00, 0x97, 0xba, 0xb2, 0xc5, 0x00, 0x6c, + 0x00, 0xb8, 0xb8, 0xae, 0xc1, 0x00, 0x82, + 0x00, 0xb0, 0xb6, 0xae, 0xc2, 0x00, 0x89 +}; + +static const unsigned int ld9040_22_180[] = { + 0x00, 0x93, 0xba, 0xb3, 0xc5, 0x00, 0x69, + 0x00, 0xb8, 0xb9, 0xae, 0xc1, 0x00, 0x7f, + 0x00, 0xb0, 0xb6, 0xae, 0xc3, 0x00, 0x85 +}; + +static const unsigned int ld9040_22_170[] = { + 0x00, 0x8b, 0xb9, 0xb3, 0xc7, 0x00, 0x65, + 0x00, 0xb7, 0xb8, 0xaf, 0xc3, 0x00, 0x7a, + 0x00, 0x80, 0xb6, 0xae, 0xc4, 0x00, 0x81 +}; + +static const unsigned int ld9040_22_160[] = { + 0x00, 0x89, 0xba, 0xb3, 0xc8, 0x00, 0x62, + 0x00, 0xb6, 0xba, 0xaf, 0xc3, 0x00, 0x76, + 0x00, 0xaf, 0xb7, 0xae, 0xc4, 0x00, 0x7e +}; + +static const unsigned int ld9040_22_150[] = { + 0x00, 0x82, 0xba, 0xb4, 0xc7, 0x00, 0x5f, + 0x00, 0xb5, 0xba, 0xb0, 0xc3, 0x00, 0x72, + 0x00, 0xae, 0xb8, 0xb0, 0xc3, 0x00, 0x7a +}; + +static const unsigned int ld9040_22_140[] = { + 0x00, 0x7b, 0xbb, 0xb4, 0xc8, 0x00, 0x5b, + 0x00, 0xb5, 0xba, 0xb1, 0xc4, 0x00, 0x6e, + 0x00, 0xae, 0xb9, 0xb0, 0xc5, 0x00, 0x75 +}; + +static const unsigned int ld9040_22_130[] = { + 0x00, 0x71, 0xbb, 0xb5, 0xc8, 0x00, 0x57, + 0x00, 0xb5, 0xbb, 0xb0, 0xc5, 0x00, 0x6a, + 0x00, 0xae, 0xb9, 0xb1, 0xc6, 0x00, 0x70 +}; + +static const unsigned int ld9040_22_120[] = { + 0x00, 0x47, 0xba, 0xb6, 0xca, 0x00, 0x53, + 0x00, 0xb5, 0xbb, 0xb3, 0xc6, 0x00, 0x65, + 0x00, 0xae, 0xb8, 0xb3, 0xc7, 0x00, 0x6c +}; + +static const unsigned int ld9040_22_110[] = { + 0x00, 0x13, 0xbb, 0xb7, 0xca, 0x00, 0x4f, + 0x00, 0xb4, 0xbb, 0xb3, 0xc7, 0x00, 0x60, + 0x00, 0xad, 0xb8, 0xb4, 0xc7, 0x00, 0x67 +}; + +static const unsigned int ld9040_22_100[] = { + 0x00, 0x13, 0xba, 0xb8, 0xcb, 0x00, 0x4b, + 0x00, 0xb3, 0xbc, 0xb4, 0xc7, 0x00, 0x5c, + 0x00, 0xac, 0xb8, 0xb4, 0xc8, 0x00, 0x62 +}; + +static const unsigned int ld9040_22_90[] = { + 0x00, 0x13, 0xb9, 0xb8, 0xcd, 0x00, 0x46, + 0x00, 0xb1, 0xbc, 0xb5, 0xc8, 0x00, 0x56, + 0x00, 0xaa, 0xb8, 0xb4, 0xc9, 0x00, 0x5d +}; + +static const unsigned int ld9040_22_80[] = { + 0x00, 0x13, 0xba, 0xb9, 0xcd, 0x00, 0x41, + 0x00, 0xb0, 0xbe, 0xb5, 0xc9, 0x00, 0x51, + 0x00, 0xa9, 0xb9, 0xb5, 0xca, 0x00, 0x57 +}; + +static const unsigned int ld9040_22_70[] = { + 0x00, 0x13, 0xb9, 0xb9, 0xd0, 0x00, 0x3c, + 0x00, 0xaf, 0xbf, 0xb6, 0xcb, 0x00, 0x4b, + 0x00, 0xa8, 0xb9, 0xb5, 0xcc, 0x00, 0x52 +}; + +static const unsigned int ld9040_22_50[] = { + 0x00, 0x13, 0xb2, 0xba, 0xd2, 0x00, 0x30, + 0x00, 0xaf, 0xc0, 0xb8, 0xcd, 0x00, 0x3d, + 0x00, 0xa8, 0xb8, 0xb7, 0xcd, 0x00, 0x44 +}; + +struct ld9040_gamma { + unsigned int *gamma_22_table[MAX_GAMMA_LEVEL]; +}; + +static struct ld9040_gamma gamma_table = { + .gamma_22_table[0] = (unsigned int *)&ld9040_22_50, + .gamma_22_table[1] = (unsigned int *)&ld9040_22_70, + .gamma_22_table[2] = (unsigned int *)&ld9040_22_80, + .gamma_22_table[3] = (unsigned int *)&ld9040_22_90, + .gamma_22_table[4] = (unsigned int *)&ld9040_22_100, + .gamma_22_table[5] = (unsigned int *)&ld9040_22_110, + .gamma_22_table[6] = (unsigned int *)&ld9040_22_120, + .gamma_22_table[7] = (unsigned int *)&ld9040_22_130, + .gamma_22_table[8] = (unsigned int *)&ld9040_22_140, + .gamma_22_table[9] = (unsigned int *)&ld9040_22_150, + .gamma_22_table[10] = (unsigned int *)&ld9040_22_160, + .gamma_22_table[11] = (unsigned int *)&ld9040_22_170, + .gamma_22_table[12] = (unsigned int *)&ld9040_22_180, + .gamma_22_table[13] = (unsigned int *)&ld9040_22_190, + .gamma_22_table[14] = (unsigned int *)&ld9040_22_200, + .gamma_22_table[15] = (unsigned int *)&ld9040_22_210, + .gamma_22_table[16] = (unsigned int *)&ld9040_22_220, + .gamma_22_table[17] = (unsigned int *)&ld9040_22_230, + .gamma_22_table[18] = (unsigned int *)&ld9040_22_240, + .gamma_22_table[19] = (unsigned int *)&ld9040_22_250, + .gamma_22_table[20] = (unsigned int *)&ld9040_22_260, + .gamma_22_table[21] = (unsigned int *)&ld9040_22_270, + .gamma_22_table[22] = (unsigned int *)&ld9040_22_280, + .gamma_22_table[23] = (unsigned int *)&ld9040_22_290, + .gamma_22_table[24] = (unsigned int *)&ld9040_22_300, +}; + +#endif diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c new file mode 100644 index 00000000000..cff1fbe89a1 --- /dev/null +++ b/drivers/video/backlight/lm3533_bl.c @@ -0,0 +1,412 @@ +/* + * lm3533-bl.c -- LM3533 Backlight driver + * + * Copyright (C) 2011-2012 Texas Instruments + * + * Author: Johan Hovold <jhovold@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/backlight.h> +#include <linux/fb.h> +#include <linux/slab.h> + +#include <linux/mfd/lm3533.h> + + +#define LM3533_HVCTRLBANK_COUNT 2 +#define LM3533_BL_MAX_BRIGHTNESS 255 + +#define LM3533_REG_CTRLBANK_AB_BCONF 0x1a + + +struct lm3533_bl { + struct lm3533 *lm3533; + struct lm3533_ctrlbank cb; + struct backlight_device *bd; + int id; +}; + + +static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl) +{ + return bl->id; +} + +static int lm3533_bl_update_status(struct backlight_device *bd) +{ + struct lm3533_bl *bl = bl_get_data(bd); + int brightness = bd->props.brightness; + + if (bd->props.power != FB_BLANK_UNBLANK) + brightness = 0; + if (bd->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + return lm3533_ctrlbank_set_brightness(&bl->cb, (u8)brightness); +} + +static int lm3533_bl_get_brightness(struct backlight_device *bd) +{ + struct lm3533_bl *bl = bl_get_data(bd); + u8 val; + int ret; + + ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val); + if (ret) + return ret; + + return val; +} + +static const struct backlight_ops lm3533_bl_ops = { + .get_brightness = lm3533_bl_get_brightness, + .update_status = lm3533_bl_update_status, +}; + +static ssize_t show_id(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + + return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id); +} + +static ssize_t show_als_channel(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + unsigned channel = lm3533_bl_get_ctrlbank_id(bl); + + return scnprintf(buf, PAGE_SIZE, "%u\n", channel); +} + +static ssize_t show_als_en(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + int ctrlbank = lm3533_bl_get_ctrlbank_id(bl); + u8 val; + u8 mask; + bool enable; + int ret; + + ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val); + if (ret) + return ret; + + mask = 1 << (2 * ctrlbank); + enable = val & mask; + + return scnprintf(buf, PAGE_SIZE, "%d\n", enable); +} + +static ssize_t store_als_en(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + int ctrlbank = lm3533_bl_get_ctrlbank_id(bl); + int enable; + u8 val; + u8 mask; + int ret; + + if (kstrtoint(buf, 0, &enable)) + return -EINVAL; + + mask = 1 << (2 * ctrlbank); + + if (enable) + val = mask; + else + val = 0; + + ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val, + mask); + if (ret) + return ret; + + return len; +} + +static ssize_t show_linear(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + u8 val; + u8 mask; + int linear; + int ret; + + ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val); + if (ret) + return ret; + + mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1); + + if (val & mask) + linear = 1; + else + linear = 0; + + return scnprintf(buf, PAGE_SIZE, "%x\n", linear); +} + +static ssize_t store_linear(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + unsigned long linear; + u8 mask; + u8 val; + int ret; + + if (kstrtoul(buf, 0, &linear)) + return -EINVAL; + + mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1); + + if (linear) + val = mask; + else + val = 0; + + ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val, + mask); + if (ret) + return ret; + + return len; +} + +static ssize_t show_pwm(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + u8 val; + int ret; + + ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val); + if (ret) + return ret; + + return scnprintf(buf, PAGE_SIZE, "%u\n", val); +} + +static ssize_t store_pwm(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + u8 val; + int ret; + + if (kstrtou8(buf, 0, &val)) + return -EINVAL; + + ret = lm3533_ctrlbank_set_pwm(&bl->cb, val); + if (ret) + return ret; + + return len; +} + +static LM3533_ATTR_RO(als_channel); +static LM3533_ATTR_RW(als_en); +static LM3533_ATTR_RO(id); +static LM3533_ATTR_RW(linear); +static LM3533_ATTR_RW(pwm); + +static struct attribute *lm3533_bl_attributes[] = { + &dev_attr_als_channel.attr, + &dev_attr_als_en.attr, + &dev_attr_id.attr, + &dev_attr_linear.attr, + &dev_attr_pwm.attr, + NULL, +}; + +static umode_t lm3533_bl_attr_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct lm3533_bl *bl = dev_get_drvdata(dev); + umode_t mode = attr->mode; + + if (attr == &dev_attr_als_channel.attr || + attr == &dev_attr_als_en.attr) { + if (!bl->lm3533->have_als) + mode = 0; + } + + return mode; +}; + +static struct attribute_group lm3533_bl_attribute_group = { + .is_visible = lm3533_bl_attr_is_visible, + .attrs = lm3533_bl_attributes +}; + +static int lm3533_bl_setup(struct lm3533_bl *bl, + struct lm3533_bl_platform_data *pdata) +{ + int ret; + + ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current); + if (ret) + return ret; + + return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm); +} + +static int lm3533_bl_probe(struct platform_device *pdev) +{ + struct lm3533 *lm3533; + struct lm3533_bl_platform_data *pdata; + struct lm3533_bl *bl; + struct backlight_device *bd; + struct backlight_properties props; + int ret; + + dev_dbg(&pdev->dev, "%s\n", __func__); + + lm3533 = dev_get_drvdata(pdev->dev.parent); + if (!lm3533) + return -EINVAL; + + pdata = dev_get_platdata(&pdev->dev); + if (!pdata) { + dev_err(&pdev->dev, "no platform data\n"); + return -EINVAL; + } + + if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) { + dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id); + return -EINVAL; + } + + bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL); + if (!bl) + return -ENOMEM; + + bl->lm3533 = lm3533; + bl->id = pdev->id; + + bl->cb.lm3533 = lm3533; + bl->cb.id = lm3533_bl_get_ctrlbank_id(bl); + bl->cb.dev = NULL; /* until registered */ + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = LM3533_BL_MAX_BRIGHTNESS; + props.brightness = pdata->default_brightness; + bd = devm_backlight_device_register(&pdev->dev, pdata->name, + pdev->dev.parent, bl, &lm3533_bl_ops, + &props); + if (IS_ERR(bd)) { + dev_err(&pdev->dev, "failed to register backlight device\n"); + return PTR_ERR(bd); + } + + bl->bd = bd; + bl->cb.dev = &bl->bd->dev; + + platform_set_drvdata(pdev, bl); + + ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group); + if (ret < 0) { + dev_err(&pdev->dev, "failed to create sysfs attributes\n"); + return ret; + } + + backlight_update_status(bd); + + ret = lm3533_bl_setup(bl, pdata); + if (ret) + goto err_sysfs_remove; + + ret = lm3533_ctrlbank_enable(&bl->cb); + if (ret) + goto err_sysfs_remove; + + return 0; + +err_sysfs_remove: + sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group); + + return ret; +} + +static int lm3533_bl_remove(struct platform_device *pdev) +{ + struct lm3533_bl *bl = platform_get_drvdata(pdev); + struct backlight_device *bd = bl->bd; + + dev_dbg(&bd->dev, "%s\n", __func__); + + bd->props.power = FB_BLANK_POWERDOWN; + bd->props.brightness = 0; + + lm3533_ctrlbank_disable(&bl->cb); + sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int lm3533_bl_suspend(struct device *dev) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + + dev_dbg(dev, "%s\n", __func__); + + return lm3533_ctrlbank_disable(&bl->cb); +} + +static int lm3533_bl_resume(struct device *dev) +{ + struct lm3533_bl *bl = dev_get_drvdata(dev); + + dev_dbg(dev, "%s\n", __func__); + + return lm3533_ctrlbank_enable(&bl->cb); +} +#endif + +static SIMPLE_DEV_PM_OPS(lm3533_bl_pm_ops, lm3533_bl_suspend, lm3533_bl_resume); + +static void lm3533_bl_shutdown(struct platform_device *pdev) +{ + struct lm3533_bl *bl = platform_get_drvdata(pdev); + + dev_dbg(&pdev->dev, "%s\n", __func__); + + lm3533_ctrlbank_disable(&bl->cb); +} + +static struct platform_driver lm3533_bl_driver = { + .driver = { + .name = "lm3533-backlight", + .owner = THIS_MODULE, + .pm = &lm3533_bl_pm_ops, + }, + .probe = lm3533_bl_probe, + .remove = lm3533_bl_remove, + .shutdown = lm3533_bl_shutdown, +}; +module_platform_driver(lm3533_bl_driver); + +MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>"); +MODULE_DESCRIPTION("LM3533 Backlight driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lm3533-backlight"); diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c new file mode 100644 index 00000000000..35fe4825a45 --- /dev/null +++ b/drivers/video/backlight/lm3630a_bl.c @@ -0,0 +1,483 @@ +/* +* Simple driver for Texas Instruments LM3630A Backlight driver chip +* Copyright (C) 2012 Texas Instruments +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License version 2 as +* published by the Free Software Foundation. +* +*/ +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/uaccess.h> +#include <linux/interrupt.h> +#include <linux/regmap.h> +#include <linux/pwm.h> +#include <linux/platform_data/lm3630a_bl.h> + +#define REG_CTRL 0x00 +#define REG_BOOST 0x02 +#define REG_CONFIG 0x01 +#define REG_BRT_A 0x03 +#define REG_BRT_B 0x04 +#define REG_I_A 0x05 +#define REG_I_B 0x06 +#define REG_INT_STATUS 0x09 +#define REG_INT_EN 0x0A +#define REG_FAULT 0x0B +#define REG_PWM_OUTLOW 0x12 +#define REG_PWM_OUTHIGH 0x13 +#define REG_MAX 0x1F + +#define INT_DEBOUNCE_MSEC 10 +struct lm3630a_chip { + struct device *dev; + struct delayed_work work; + + int irq; + struct workqueue_struct *irqthread; + struct lm3630a_platform_data *pdata; + struct backlight_device *bleda; + struct backlight_device *bledb; + struct regmap *regmap; + struct pwm_device *pwmd; +}; + +/* i2c access */ +static int lm3630a_read(struct lm3630a_chip *pchip, unsigned int reg) +{ + int rval; + unsigned int reg_val; + + rval = regmap_read(pchip->regmap, reg, ®_val); + if (rval < 0) + return rval; + return reg_val & 0xFF; +} + +static int lm3630a_write(struct lm3630a_chip *pchip, + unsigned int reg, unsigned int data) +{ + return regmap_write(pchip->regmap, reg, data); +} + +static int lm3630a_update(struct lm3630a_chip *pchip, + unsigned int reg, unsigned int mask, + unsigned int data) +{ + return regmap_update_bits(pchip->regmap, reg, mask, data); +} + +/* initialize chip */ +static int lm3630a_chip_init(struct lm3630a_chip *pchip) +{ + int rval; + struct lm3630a_platform_data *pdata = pchip->pdata; + + usleep_range(1000, 2000); + /* set Filter Strength Register */ + rval = lm3630a_write(pchip, 0x50, 0x03); + /* set Cofig. register */ + rval |= lm3630a_update(pchip, REG_CONFIG, 0x07, pdata->pwm_ctrl); + /* set boost control */ + rval |= lm3630a_write(pchip, REG_BOOST, 0x38); + /* set current A */ + rval |= lm3630a_update(pchip, REG_I_A, 0x1F, 0x1F); + /* set current B */ + rval |= lm3630a_write(pchip, REG_I_B, 0x1F); + /* set control */ + rval |= lm3630a_update(pchip, REG_CTRL, 0x14, pdata->leda_ctrl); + rval |= lm3630a_update(pchip, REG_CTRL, 0x0B, pdata->ledb_ctrl); + usleep_range(1000, 2000); + /* set brightness A and B */ + rval |= lm3630a_write(pchip, REG_BRT_A, pdata->leda_init_brt); + rval |= lm3630a_write(pchip, REG_BRT_B, pdata->ledb_init_brt); + + if (rval < 0) + dev_err(pchip->dev, "i2c failed to access register\n"); + return rval; +} + +/* interrupt handling */ +static void lm3630a_delayed_func(struct work_struct *work) +{ + int rval; + struct lm3630a_chip *pchip; + + pchip = container_of(work, struct lm3630a_chip, work.work); + + rval = lm3630a_read(pchip, REG_INT_STATUS); + if (rval < 0) { + dev_err(pchip->dev, + "i2c failed to access REG_INT_STATUS Register\n"); + return; + } + + dev_info(pchip->dev, "REG_INT_STATUS Register is 0x%x\n", rval); +} + +static irqreturn_t lm3630a_isr_func(int irq, void *chip) +{ + int rval; + struct lm3630a_chip *pchip = chip; + unsigned long delay = msecs_to_jiffies(INT_DEBOUNCE_MSEC); + + queue_delayed_work(pchip->irqthread, &pchip->work, delay); + + rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00); + if (rval < 0) { + dev_err(pchip->dev, "i2c failed to access register\n"); + return IRQ_NONE; + } + return IRQ_HANDLED; +} + +static int lm3630a_intr_config(struct lm3630a_chip *pchip) +{ + int rval; + + rval = lm3630a_write(pchip, REG_INT_EN, 0x87); + if (rval < 0) + return rval; + + INIT_DELAYED_WORK(&pchip->work, lm3630a_delayed_func); + pchip->irqthread = create_singlethread_workqueue("lm3630a-irqthd"); + if (!pchip->irqthread) { + dev_err(pchip->dev, "create irq thread fail\n"); + return -ENOMEM; + } + if (request_threaded_irq + (pchip->irq, NULL, lm3630a_isr_func, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "lm3630a_irq", pchip)) { + dev_err(pchip->dev, "request threaded irq fail\n"); + destroy_workqueue(pchip->irqthread); + return -ENOMEM; + } + return rval; +} + +static void lm3630a_pwm_ctrl(struct lm3630a_chip *pchip, int br, int br_max) +{ + unsigned int period = pwm_get_period(pchip->pwmd); + unsigned int duty = br * period / br_max; + + pwm_config(pchip->pwmd, duty, period); + if (duty) + pwm_enable(pchip->pwmd); + else + pwm_disable(pchip->pwmd); +} + +/* update and get brightness */ +static int lm3630a_bank_a_update_status(struct backlight_device *bl) +{ + int ret; + struct lm3630a_chip *pchip = bl_get_data(bl); + enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl; + + /* pwm control */ + if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0) { + lm3630a_pwm_ctrl(pchip, bl->props.brightness, + bl->props.max_brightness); + return bl->props.brightness; + } + + /* disable sleep */ + ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00); + if (ret < 0) + goto out_i2c_err; + usleep_range(1000, 2000); + /* minimum brightness is 0x04 */ + ret = lm3630a_write(pchip, REG_BRT_A, bl->props.brightness); + if (bl->props.brightness < 0x4) + ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDA_ENABLE, 0); + else + ret |= lm3630a_update(pchip, REG_CTRL, + LM3630A_LEDA_ENABLE, LM3630A_LEDA_ENABLE); + if (ret < 0) + goto out_i2c_err; + return bl->props.brightness; + +out_i2c_err: + dev_err(pchip->dev, "i2c failed to access\n"); + return bl->props.brightness; +} + +static int lm3630a_bank_a_get_brightness(struct backlight_device *bl) +{ + int brightness, rval; + struct lm3630a_chip *pchip = bl_get_data(bl); + enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl; + + if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0) { + rval = lm3630a_read(pchip, REG_PWM_OUTHIGH); + if (rval < 0) + goto out_i2c_err; + brightness = (rval & 0x01) << 8; + rval = lm3630a_read(pchip, REG_PWM_OUTLOW); + if (rval < 0) + goto out_i2c_err; + brightness |= rval; + goto out; + } + + /* disable sleep */ + rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00); + if (rval < 0) + goto out_i2c_err; + usleep_range(1000, 2000); + rval = lm3630a_read(pchip, REG_BRT_A); + if (rval < 0) + goto out_i2c_err; + brightness = rval; + +out: + bl->props.brightness = brightness; + return bl->props.brightness; +out_i2c_err: + dev_err(pchip->dev, "i2c failed to access register\n"); + return 0; +} + +static const struct backlight_ops lm3630a_bank_a_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lm3630a_bank_a_update_status, + .get_brightness = lm3630a_bank_a_get_brightness, +}; + +/* update and get brightness */ +static int lm3630a_bank_b_update_status(struct backlight_device *bl) +{ + int ret; + struct lm3630a_chip *pchip = bl_get_data(bl); + enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl; + + /* pwm control */ + if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0) { + lm3630a_pwm_ctrl(pchip, bl->props.brightness, + bl->props.max_brightness); + return bl->props.brightness; + } + + /* disable sleep */ + ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00); + if (ret < 0) + goto out_i2c_err; + usleep_range(1000, 2000); + /* minimum brightness is 0x04 */ + ret = lm3630a_write(pchip, REG_BRT_B, bl->props.brightness); + if (bl->props.brightness < 0x4) + ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDB_ENABLE, 0); + else + ret |= lm3630a_update(pchip, REG_CTRL, + LM3630A_LEDB_ENABLE, LM3630A_LEDB_ENABLE); + if (ret < 0) + goto out_i2c_err; + return bl->props.brightness; + +out_i2c_err: + dev_err(pchip->dev, "i2c failed to access REG_CTRL\n"); + return bl->props.brightness; +} + +static int lm3630a_bank_b_get_brightness(struct backlight_device *bl) +{ + int brightness, rval; + struct lm3630a_chip *pchip = bl_get_data(bl); + enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl; + + if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0) { + rval = lm3630a_read(pchip, REG_PWM_OUTHIGH); + if (rval < 0) + goto out_i2c_err; + brightness = (rval & 0x01) << 8; + rval = lm3630a_read(pchip, REG_PWM_OUTLOW); + if (rval < 0) + goto out_i2c_err; + brightness |= rval; + goto out; + } + + /* disable sleep */ + rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00); + if (rval < 0) + goto out_i2c_err; + usleep_range(1000, 2000); + rval = lm3630a_read(pchip, REG_BRT_B); + if (rval < 0) + goto out_i2c_err; + brightness = rval; + +out: + bl->props.brightness = brightness; + return bl->props.brightness; +out_i2c_err: + dev_err(pchip->dev, "i2c failed to access register\n"); + return 0; +} + +static const struct backlight_ops lm3630a_bank_b_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lm3630a_bank_b_update_status, + .get_brightness = lm3630a_bank_b_get_brightness, +}; + +static int lm3630a_backlight_register(struct lm3630a_chip *pchip) +{ + struct backlight_properties props; + struct lm3630a_platform_data *pdata = pchip->pdata; + + props.type = BACKLIGHT_RAW; + if (pdata->leda_ctrl != LM3630A_LEDA_DISABLE) { + props.brightness = pdata->leda_init_brt; + props.max_brightness = pdata->leda_max_brt; + pchip->bleda = + devm_backlight_device_register(pchip->dev, "lm3630a_leda", + pchip->dev, pchip, + &lm3630a_bank_a_ops, &props); + if (IS_ERR(pchip->bleda)) + return PTR_ERR(pchip->bleda); + } + + if ((pdata->ledb_ctrl != LM3630A_LEDB_DISABLE) && + (pdata->ledb_ctrl != LM3630A_LEDB_ON_A)) { + props.brightness = pdata->ledb_init_brt; + props.max_brightness = pdata->ledb_max_brt; + pchip->bledb = + devm_backlight_device_register(pchip->dev, "lm3630a_ledb", + pchip->dev, pchip, + &lm3630a_bank_b_ops, &props); + if (IS_ERR(pchip->bledb)) + return PTR_ERR(pchip->bledb); + } + return 0; +} + +static const struct regmap_config lm3630a_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = REG_MAX, +}; + +static int lm3630a_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lm3630a_platform_data *pdata = dev_get_platdata(&client->dev); + struct lm3630a_chip *pchip; + int rval; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, "fail : i2c functionality check\n"); + return -EOPNOTSUPP; + } + + pchip = devm_kzalloc(&client->dev, sizeof(struct lm3630a_chip), + GFP_KERNEL); + if (!pchip) + return -ENOMEM; + pchip->dev = &client->dev; + + pchip->regmap = devm_regmap_init_i2c(client, &lm3630a_regmap); + if (IS_ERR(pchip->regmap)) { + rval = PTR_ERR(pchip->regmap); + dev_err(&client->dev, "fail : allocate reg. map: %d\n", rval); + return rval; + } + + i2c_set_clientdata(client, pchip); + if (pdata == NULL) { + pdata = devm_kzalloc(pchip->dev, + sizeof(struct lm3630a_platform_data), + GFP_KERNEL); + if (pdata == NULL) + return -ENOMEM; + /* default values */ + pdata->leda_ctrl = LM3630A_LEDA_ENABLE; + pdata->ledb_ctrl = LM3630A_LEDB_ENABLE; + pdata->leda_max_brt = LM3630A_MAX_BRIGHTNESS; + pdata->ledb_max_brt = LM3630A_MAX_BRIGHTNESS; + pdata->leda_init_brt = LM3630A_MAX_BRIGHTNESS; + pdata->ledb_init_brt = LM3630A_MAX_BRIGHTNESS; + } + pchip->pdata = pdata; + + /* chip initialize */ + rval = lm3630a_chip_init(pchip); + if (rval < 0) { + dev_err(&client->dev, "fail : init chip\n"); + return rval; + } + /* backlight register */ + rval = lm3630a_backlight_register(pchip); + if (rval < 0) { + dev_err(&client->dev, "fail : backlight register.\n"); + return rval; + } + /* pwm */ + if (pdata->pwm_ctrl != LM3630A_PWM_DISABLE) { + pchip->pwmd = devm_pwm_get(pchip->dev, "lm3630a-pwm"); + if (IS_ERR(pchip->pwmd)) { + dev_err(&client->dev, "fail : get pwm device\n"); + return PTR_ERR(pchip->pwmd); + } + } + pchip->pwmd->period = pdata->pwm_period; + + /* interrupt enable : irq 0 is not allowed */ + pchip->irq = client->irq; + if (pchip->irq) { + rval = lm3630a_intr_config(pchip); + if (rval < 0) + return rval; + } + dev_info(&client->dev, "LM3630A backlight register OK.\n"); + return 0; +} + +static int lm3630a_remove(struct i2c_client *client) +{ + int rval; + struct lm3630a_chip *pchip = i2c_get_clientdata(client); + + rval = lm3630a_write(pchip, REG_BRT_A, 0); + if (rval < 0) + dev_err(pchip->dev, "i2c failed to access register\n"); + + rval = lm3630a_write(pchip, REG_BRT_B, 0); + if (rval < 0) + dev_err(pchip->dev, "i2c failed to access register\n"); + + if (pchip->irq) { + free_irq(pchip->irq, pchip); + flush_workqueue(pchip->irqthread); + destroy_workqueue(pchip->irqthread); + } + return 0; +} + +static const struct i2c_device_id lm3630a_id[] = { + {LM3630A_NAME, 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, lm3630a_id); + +static struct i2c_driver lm3630a_i2c_driver = { + .driver = { + .name = LM3630A_NAME, + }, + .probe = lm3630a_probe, + .remove = lm3630a_remove, + .id_table = lm3630a_id, +}; + +module_i2c_driver(lm3630a_i2c_driver); + +MODULE_DESCRIPTION("Texas Instruments Backlight driver for LM3630A"); +MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>"); +MODULE_AUTHOR("LDD MLP <ldd-mlp@list.ti.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/lm3639_bl.c b/drivers/video/backlight/lm3639_bl.c new file mode 100644 index 00000000000..5f36808d214 --- /dev/null +++ b/drivers/video/backlight/lm3639_bl.c @@ -0,0 +1,434 @@ +/* +* Simple driver for Texas Instruments LM3639 Backlight + Flash LED driver chip +* Copyright (C) 2012 Texas Instruments +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License version 2 as +* published by the Free Software Foundation. +* +*/ +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/leds.h> +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/uaccess.h> +#include <linux/interrupt.h> +#include <linux/regmap.h> +#include <linux/platform_data/lm3639_bl.h> + +#define REG_DEV_ID 0x00 +#define REG_CHECKSUM 0x01 +#define REG_BL_CONF_1 0x02 +#define REG_BL_CONF_2 0x03 +#define REG_BL_CONF_3 0x04 +#define REG_BL_CONF_4 0x05 +#define REG_FL_CONF_1 0x06 +#define REG_FL_CONF_2 0x07 +#define REG_FL_CONF_3 0x08 +#define REG_IO_CTRL 0x09 +#define REG_ENABLE 0x0A +#define REG_FLAG 0x0B +#define REG_MAX REG_FLAG + +struct lm3639_chip_data { + struct device *dev; + struct lm3639_platform_data *pdata; + + struct backlight_device *bled; + struct led_classdev cdev_flash; + struct led_classdev cdev_torch; + struct regmap *regmap; + + unsigned int bled_mode; + unsigned int bled_map; + unsigned int last_flag; +}; + +/* initialize chip */ +static int lm3639_chip_init(struct lm3639_chip_data *pchip) +{ + int ret; + unsigned int reg_val; + struct lm3639_platform_data *pdata = pchip->pdata; + + /* input pins config. */ + ret = + regmap_update_bits(pchip->regmap, REG_BL_CONF_1, 0x08, + pdata->pin_pwm); + if (ret < 0) + goto out; + + reg_val = (pdata->pin_pwm & 0x40) | pdata->pin_strobe | pdata->pin_tx; + ret = regmap_update_bits(pchip->regmap, REG_IO_CTRL, 0x7C, reg_val); + if (ret < 0) + goto out; + + /* init brightness */ + ret = regmap_write(pchip->regmap, REG_BL_CONF_4, pdata->init_brt_led); + if (ret < 0) + goto out; + + ret = regmap_write(pchip->regmap, REG_BL_CONF_3, pdata->init_brt_led); + if (ret < 0) + goto out; + + /* output pins config. */ + if (!pdata->init_brt_led) { + reg_val = pdata->fled_pins; + reg_val |= pdata->bled_pins; + } else { + reg_val = pdata->fled_pins; + reg_val |= pdata->bled_pins | 0x01; + } + + ret = regmap_update_bits(pchip->regmap, REG_ENABLE, 0x79, reg_val); + if (ret < 0) + goto out; + + return ret; +out: + dev_err(pchip->dev, "i2c failed to access register\n"); + return ret; +} + +/* update and get brightness */ +static int lm3639_bled_update_status(struct backlight_device *bl) +{ + int ret; + unsigned int reg_val; + struct lm3639_chip_data *pchip = bl_get_data(bl); + struct lm3639_platform_data *pdata = pchip->pdata; + + ret = regmap_read(pchip->regmap, REG_FLAG, ®_val); + if (ret < 0) + goto out; + + if (reg_val != 0) + dev_info(pchip->dev, "last flag is 0x%x\n", reg_val); + + /* pwm control */ + if (pdata->pin_pwm) { + if (pdata->pwm_set_intensity) + pdata->pwm_set_intensity(bl->props.brightness, + pdata->max_brt_led); + else + dev_err(pchip->dev, + "No pwm control func. in plat-data\n"); + return bl->props.brightness; + } + + /* i2c control and set brigtness */ + ret = regmap_write(pchip->regmap, REG_BL_CONF_4, bl->props.brightness); + if (ret < 0) + goto out; + ret = regmap_write(pchip->regmap, REG_BL_CONF_3, bl->props.brightness); + if (ret < 0) + goto out; + + if (!bl->props.brightness) + ret = regmap_update_bits(pchip->regmap, REG_ENABLE, 0x01, 0x00); + else + ret = regmap_update_bits(pchip->regmap, REG_ENABLE, 0x01, 0x01); + if (ret < 0) + goto out; + + return bl->props.brightness; +out: + dev_err(pchip->dev, "i2c failed to access registers\n"); + return bl->props.brightness; +} + +static int lm3639_bled_get_brightness(struct backlight_device *bl) +{ + int ret; + unsigned int reg_val; + struct lm3639_chip_data *pchip = bl_get_data(bl); + struct lm3639_platform_data *pdata = pchip->pdata; + + if (pdata->pin_pwm) { + if (pdata->pwm_get_intensity) + bl->props.brightness = pdata->pwm_get_intensity(); + else + dev_err(pchip->dev, + "No pwm control func. in plat-data\n"); + return bl->props.brightness; + } + + ret = regmap_read(pchip->regmap, REG_BL_CONF_1, ®_val); + if (ret < 0) + goto out; + if (reg_val & 0x10) + ret = regmap_read(pchip->regmap, REG_BL_CONF_4, ®_val); + else + ret = regmap_read(pchip->regmap, REG_BL_CONF_3, ®_val); + if (ret < 0) + goto out; + bl->props.brightness = reg_val; + + return bl->props.brightness; +out: + dev_err(pchip->dev, "i2c failed to access register\n"); + return bl->props.brightness; +} + +static const struct backlight_ops lm3639_bled_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lm3639_bled_update_status, + .get_brightness = lm3639_bled_get_brightness, +}; + +/* backlight mapping mode */ +static ssize_t lm3639_bled_mode_store(struct device *dev, + struct device_attribute *devAttr, + const char *buf, size_t size) +{ + ssize_t ret; + struct lm3639_chip_data *pchip = dev_get_drvdata(dev); + unsigned int state; + + ret = kstrtouint(buf, 10, &state); + if (ret) + goto out_input; + + if (!state) + ret = + regmap_update_bits(pchip->regmap, REG_BL_CONF_1, 0x10, + 0x00); + else + ret = + regmap_update_bits(pchip->regmap, REG_BL_CONF_1, 0x10, + 0x10); + + if (ret < 0) + goto out; + + return size; + +out: + dev_err(pchip->dev, "%s:i2c access fail to register\n", __func__); + return ret; + +out_input: + dev_err(pchip->dev, "%s:input conversion fail\n", __func__); + return ret; + +} + +static DEVICE_ATTR(bled_mode, S_IWUSR, NULL, lm3639_bled_mode_store); + +/* torch */ +static void lm3639_torch_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + int ret; + unsigned int reg_val; + struct lm3639_chip_data *pchip; + + pchip = container_of(cdev, struct lm3639_chip_data, cdev_torch); + + ret = regmap_read(pchip->regmap, REG_FLAG, ®_val); + if (ret < 0) + goto out; + if (reg_val != 0) + dev_info(pchip->dev, "last flag is 0x%x\n", reg_val); + + /* brightness 0 means off state */ + if (!brightness) { + ret = regmap_update_bits(pchip->regmap, REG_ENABLE, 0x06, 0x00); + if (ret < 0) + goto out; + return; + } + + ret = regmap_update_bits(pchip->regmap, + REG_FL_CONF_1, 0x70, (brightness - 1) << 4); + if (ret < 0) + goto out; + ret = regmap_update_bits(pchip->regmap, REG_ENABLE, 0x06, 0x02); + if (ret < 0) + goto out; + + return; +out: + dev_err(pchip->dev, "i2c failed to access register\n"); + return; +} + +/* flash */ +static void lm3639_flash_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + int ret; + unsigned int reg_val; + struct lm3639_chip_data *pchip; + + pchip = container_of(cdev, struct lm3639_chip_data, cdev_flash); + + ret = regmap_read(pchip->regmap, REG_FLAG, ®_val); + if (ret < 0) + goto out; + if (reg_val != 0) + dev_info(pchip->dev, "last flag is 0x%x\n", reg_val); + + /* torch off before flash control */ + ret = regmap_update_bits(pchip->regmap, REG_ENABLE, 0x06, 0x00); + if (ret < 0) + goto out; + + /* brightness 0 means off state */ + if (!brightness) + return; + + ret = regmap_update_bits(pchip->regmap, + REG_FL_CONF_1, 0x0F, brightness - 1); + if (ret < 0) + goto out; + ret = regmap_update_bits(pchip->regmap, REG_ENABLE, 0x06, 0x06); + if (ret < 0) + goto out; + + return; +out: + dev_err(pchip->dev, "i2c failed to access register\n"); + return; +} + +static const struct regmap_config lm3639_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = REG_MAX, +}; + +static int lm3639_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct lm3639_chip_data *pchip; + struct lm3639_platform_data *pdata = dev_get_platdata(&client->dev); + struct backlight_properties props; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, "i2c functionality check fail.\n"); + return -EOPNOTSUPP; + } + + if (pdata == NULL) { + dev_err(&client->dev, "Needs Platform Data.\n"); + return -ENODATA; + } + + pchip = devm_kzalloc(&client->dev, + sizeof(struct lm3639_chip_data), GFP_KERNEL); + if (!pchip) + return -ENOMEM; + + pchip->pdata = pdata; + pchip->dev = &client->dev; + + pchip->regmap = devm_regmap_init_i2c(client, &lm3639_regmap); + if (IS_ERR(pchip->regmap)) { + ret = PTR_ERR(pchip->regmap); + dev_err(&client->dev, "fail : allocate register map: %d\n", + ret); + return ret; + } + i2c_set_clientdata(client, pchip); + + /* chip initialize */ + ret = lm3639_chip_init(pchip); + if (ret < 0) { + dev_err(&client->dev, "fail : chip init\n"); + goto err_out; + } + + /* backlight */ + props.type = BACKLIGHT_RAW; + props.brightness = pdata->init_brt_led; + props.max_brightness = pdata->max_brt_led; + pchip->bled = + devm_backlight_device_register(pchip->dev, "lm3639_bled", + pchip->dev, pchip, &lm3639_bled_ops, + &props); + if (IS_ERR(pchip->bled)) { + dev_err(&client->dev, "fail : backlight register\n"); + ret = PTR_ERR(pchip->bled); + goto err_out; + } + + ret = device_create_file(&(pchip->bled->dev), &dev_attr_bled_mode); + if (ret < 0) { + dev_err(&client->dev, "failed : add sysfs entries\n"); + goto err_out; + } + + /* flash */ + pchip->cdev_flash.name = "lm3639_flash"; + pchip->cdev_flash.max_brightness = 16; + pchip->cdev_flash.brightness_set = lm3639_flash_brightness_set; + ret = led_classdev_register((struct device *) + &client->dev, &pchip->cdev_flash); + if (ret < 0) { + dev_err(&client->dev, "fail : flash register\n"); + goto err_flash; + } + + /* torch */ + pchip->cdev_torch.name = "lm3639_torch"; + pchip->cdev_torch.max_brightness = 8; + pchip->cdev_torch.brightness_set = lm3639_torch_brightness_set; + ret = led_classdev_register((struct device *) + &client->dev, &pchip->cdev_torch); + if (ret < 0) { + dev_err(&client->dev, "fail : torch register\n"); + goto err_torch; + } + + return 0; + +err_torch: + led_classdev_unregister(&pchip->cdev_flash); +err_flash: + device_remove_file(&(pchip->bled->dev), &dev_attr_bled_mode); +err_out: + return ret; +} + +static int lm3639_remove(struct i2c_client *client) +{ + struct lm3639_chip_data *pchip = i2c_get_clientdata(client); + + regmap_write(pchip->regmap, REG_ENABLE, 0x00); + + if (&pchip->cdev_torch) + led_classdev_unregister(&pchip->cdev_torch); + if (&pchip->cdev_flash) + led_classdev_unregister(&pchip->cdev_flash); + if (pchip->bled) + device_remove_file(&(pchip->bled->dev), &dev_attr_bled_mode); + return 0; +} + +static const struct i2c_device_id lm3639_id[] = { + {LM3639_NAME, 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, lm3639_id); +static struct i2c_driver lm3639_i2c_driver = { + .driver = { + .name = LM3639_NAME, + }, + .probe = lm3639_probe, + .remove = lm3639_remove, + .id_table = lm3639_id, +}; + +module_i2c_driver(lm3639_i2c_driver); + +MODULE_DESCRIPTION("Texas Instruments Backlight+Flash LED driver for LM3639"); +MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>"); +MODULE_AUTHOR("Ldd Mlp <ldd-mlp@list.ti.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c new file mode 100644 index 00000000000..14590c54aed --- /dev/null +++ b/drivers/video/backlight/lms283gf05.c @@ -0,0 +1,204 @@ +/* + * lms283gf05.c -- support for Samsung LMS283GF05 LCD + * + * Copyright (c) 2009 Marek Vasut <marek.vasut@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/lcd.h> + +#include <linux/spi/spi.h> +#include <linux/spi/lms283gf05.h> +#include <linux/module.h> + +struct lms283gf05_state { + struct spi_device *spi; + struct lcd_device *ld; +}; + +struct lms283gf05_seq { + unsigned char reg; + unsigned short value; + unsigned char delay; +}; + +/* Magic sequences supplied by manufacturer, for details refer to datasheet */ +static const struct lms283gf05_seq disp_initseq[] = { + /* REG, VALUE, DELAY */ + { 0x07, 0x0000, 0 }, + { 0x13, 0x0000, 10 }, + + { 0x11, 0x3004, 0 }, + { 0x14, 0x200F, 0 }, + { 0x10, 0x1a20, 0 }, + { 0x13, 0x0040, 50 }, + + { 0x13, 0x0060, 0 }, + { 0x13, 0x0070, 200 }, + + { 0x01, 0x0127, 0 }, + { 0x02, 0x0700, 0 }, + { 0x03, 0x1030, 0 }, + { 0x08, 0x0208, 0 }, + { 0x0B, 0x0620, 0 }, + { 0x0C, 0x0110, 0 }, + { 0x30, 0x0120, 0 }, + { 0x31, 0x0127, 0 }, + { 0x32, 0x0000, 0 }, + { 0x33, 0x0503, 0 }, + { 0x34, 0x0727, 0 }, + { 0x35, 0x0124, 0 }, + { 0x36, 0x0706, 0 }, + { 0x37, 0x0701, 0 }, + { 0x38, 0x0F00, 0 }, + { 0x39, 0x0F00, 0 }, + { 0x40, 0x0000, 0 }, + { 0x41, 0x0000, 0 }, + { 0x42, 0x013f, 0 }, + { 0x43, 0x0000, 0 }, + { 0x44, 0x013f, 0 }, + { 0x45, 0x0000, 0 }, + { 0x46, 0xef00, 0 }, + { 0x47, 0x013f, 0 }, + { 0x48, 0x0000, 0 }, + { 0x07, 0x0015, 30 }, + + { 0x07, 0x0017, 0 }, + + { 0x20, 0x0000, 0 }, + { 0x21, 0x0000, 0 }, + { 0x22, 0x0000, 0 } +}; + +static const struct lms283gf05_seq disp_pdwnseq[] = { + { 0x07, 0x0016, 30 }, + + { 0x07, 0x0004, 0 }, + { 0x10, 0x0220, 20 }, + + { 0x13, 0x0060, 50 }, + + { 0x13, 0x0040, 50 }, + + { 0x13, 0x0000, 0 }, + { 0x10, 0x0000, 0 } +}; + + +static void lms283gf05_reset(unsigned long gpio, bool inverted) +{ + gpio_set_value(gpio, !inverted); + mdelay(100); + gpio_set_value(gpio, inverted); + mdelay(20); + gpio_set_value(gpio, !inverted); + mdelay(20); +} + +static void lms283gf05_toggle(struct spi_device *spi, + const struct lms283gf05_seq *seq, int sz) +{ + char buf[3]; + int i; + + for (i = 0; i < sz; i++) { + buf[0] = 0x74; + buf[1] = 0x00; + buf[2] = seq[i].reg; + spi_write(spi, buf, 3); + + buf[0] = 0x76; + buf[1] = seq[i].value >> 8; + buf[2] = seq[i].value & 0xff; + spi_write(spi, buf, 3); + + mdelay(seq[i].delay); + } +} + +static int lms283gf05_power_set(struct lcd_device *ld, int power) +{ + struct lms283gf05_state *st = lcd_get_data(ld); + struct spi_device *spi = st->spi; + struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev); + + if (power <= FB_BLANK_NORMAL) { + if (pdata) + lms283gf05_reset(pdata->reset_gpio, + pdata->reset_inverted); + lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq)); + } else { + lms283gf05_toggle(spi, disp_pdwnseq, ARRAY_SIZE(disp_pdwnseq)); + if (pdata) + gpio_set_value(pdata->reset_gpio, + pdata->reset_inverted); + } + + return 0; +} + +static struct lcd_ops lms_ops = { + .set_power = lms283gf05_power_set, + .get_power = NULL, +}; + +static int lms283gf05_probe(struct spi_device *spi) +{ + struct lms283gf05_state *st; + struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev); + struct lcd_device *ld; + int ret = 0; + + if (pdata != NULL) { + ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio, + GPIOF_DIR_OUT | (!pdata->reset_inverted ? + GPIOF_INIT_HIGH : GPIOF_INIT_LOW), + "LMS285GF05 RESET"); + if (ret) + return ret; + } + + st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state), + GFP_KERNEL); + if (st == NULL) + return -ENOMEM; + + ld = devm_lcd_device_register(&spi->dev, "lms283gf05", &spi->dev, st, + &lms_ops); + if (IS_ERR(ld)) + return PTR_ERR(ld); + + st->spi = spi; + st->ld = ld; + + spi_set_drvdata(spi, st); + + /* kick in the LCD */ + if (pdata) + lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted); + lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq)); + + return 0; +} + +static struct spi_driver lms283gf05_driver = { + .driver = { + .name = "lms283gf05", + .owner = THIS_MODULE, + }, + .probe = lms283gf05_probe, +}; + +module_spi_driver(lms283gf05_driver); + +MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); +MODULE_DESCRIPTION("LCD283GF05 LCD"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/lms501kf03.c b/drivers/video/backlight/lms501kf03.c new file mode 100644 index 00000000000..77258b7b04b --- /dev/null +++ b/drivers/video/backlight/lms501kf03.c @@ -0,0 +1,437 @@ +/* + * lms501kf03 TFT LCD panel driver. + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * Author: Jingoo Han <jg1.han@samsung.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/lcd.h> +#include <linux/module.h> +#include <linux/spi/spi.h> +#include <linux/wait.h> + +#define COMMAND_ONLY 0x00 +#define DATA_ONLY 0x01 + +struct lms501kf03 { + struct device *dev; + struct spi_device *spi; + unsigned int power; + struct lcd_device *ld; + struct lcd_platform_data *lcd_pd; +}; + +static const unsigned char seq_password[] = { + 0xb9, 0xff, 0x83, 0x69, +}; + +static const unsigned char seq_power[] = { + 0xb1, 0x01, 0x00, 0x34, 0x06, 0x00, 0x14, 0x14, 0x20, 0x28, + 0x12, 0x12, 0x17, 0x0a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6, +}; + +static const unsigned char seq_display[] = { + 0xb2, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0x03, 0x03, 0x00, 0x01, +}; + +static const unsigned char seq_rgb_if[] = { + 0xb3, 0x09, +}; + +static const unsigned char seq_display_inv[] = { + 0xb4, 0x01, 0x08, 0x77, 0x0e, 0x06, +}; + +static const unsigned char seq_vcom[] = { + 0xb6, 0x4c, 0x2e, +}; + +static const unsigned char seq_gate[] = { + 0xd5, 0x00, 0x05, 0x03, 0x29, 0x01, 0x07, 0x17, 0x68, 0x13, + 0x37, 0x20, 0x31, 0x8a, 0x46, 0x9b, 0x57, 0x13, 0x02, 0x75, + 0xb9, 0x64, 0xa8, 0x07, 0x0f, 0x04, 0x07, +}; + +static const unsigned char seq_panel[] = { + 0xcc, 0x02, +}; + +static const unsigned char seq_col_mod[] = { + 0x3a, 0x77, +}; + +static const unsigned char seq_w_gamma[] = { + 0xe0, 0x00, 0x04, 0x09, 0x0f, 0x1f, 0x3f, 0x1f, 0x2f, 0x0a, + 0x0f, 0x10, 0x16, 0x18, 0x16, 0x17, 0x0d, 0x15, 0x00, 0x04, + 0x09, 0x0f, 0x38, 0x3f, 0x20, 0x39, 0x0a, 0x0f, 0x10, 0x16, + 0x18, 0x16, 0x17, 0x0d, 0x15, +}; + +static const unsigned char seq_rgb_gamma[] = { + 0xc1, 0x01, 0x03, 0x07, 0x0f, 0x1a, 0x22, 0x2c, 0x33, 0x3c, + 0x46, 0x4f, 0x58, 0x60, 0x69, 0x71, 0x79, 0x82, 0x89, 0x92, + 0x9a, 0xa1, 0xa9, 0xb1, 0xb9, 0xc1, 0xc9, 0xcf, 0xd6, 0xde, + 0xe5, 0xec, 0xf3, 0xf9, 0xff, 0xdd, 0x39, 0x07, 0x1c, 0xcb, + 0xab, 0x5f, 0x49, 0x80, 0x03, 0x07, 0x0f, 0x19, 0x20, 0x2a, + 0x31, 0x39, 0x42, 0x4b, 0x53, 0x5b, 0x63, 0x6b, 0x73, 0x7b, + 0x83, 0x8a, 0x92, 0x9b, 0xa2, 0xaa, 0xb2, 0xba, 0xc2, 0xca, + 0xd0, 0xd8, 0xe1, 0xe8, 0xf0, 0xf8, 0xff, 0xf7, 0xd8, 0xbe, + 0xa7, 0x39, 0x40, 0x85, 0x8c, 0xc0, 0x04, 0x07, 0x0c, 0x17, + 0x1c, 0x23, 0x2b, 0x34, 0x3b, 0x43, 0x4c, 0x54, 0x5b, 0x63, + 0x6a, 0x73, 0x7a, 0x82, 0x8a, 0x91, 0x98, 0xa1, 0xa8, 0xb0, + 0xb7, 0xc1, 0xc9, 0xcf, 0xd9, 0xe3, 0xea, 0xf4, 0xff, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; + +static const unsigned char seq_up_dn[] = { + 0x36, 0x10, +}; + +static const unsigned char seq_sleep_in[] = { + 0x10, +}; + +static const unsigned char seq_sleep_out[] = { + 0x11, +}; + +static const unsigned char seq_display_on[] = { + 0x29, +}; + +static const unsigned char seq_display_off[] = { + 0x10, +}; + +static int lms501kf03_spi_write_byte(struct lms501kf03 *lcd, int addr, int data) +{ + u16 buf[1]; + struct spi_message msg; + + struct spi_transfer xfer = { + .len = 2, + .tx_buf = buf, + }; + + buf[0] = (addr << 8) | data; + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + return spi_sync(lcd->spi, &msg); +} + +static int lms501kf03_spi_write(struct lms501kf03 *lcd, unsigned char address, + unsigned char command) +{ + return lms501kf03_spi_write_byte(lcd, address, command); +} + +static int lms501kf03_panel_send_sequence(struct lms501kf03 *lcd, + const unsigned char *wbuf, + unsigned int len) +{ + int ret = 0, i = 0; + + while (i < len) { + if (i == 0) + ret = lms501kf03_spi_write(lcd, COMMAND_ONLY, wbuf[i]); + else + ret = lms501kf03_spi_write(lcd, DATA_ONLY, wbuf[i]); + if (ret) + break; + i += 1; + } + + return ret; +} + +static int lms501kf03_ldi_init(struct lms501kf03 *lcd) +{ + int ret, i; + static const unsigned char *init_seq[] = { + seq_password, + seq_power, + seq_display, + seq_rgb_if, + seq_display_inv, + seq_vcom, + seq_gate, + seq_panel, + seq_col_mod, + seq_w_gamma, + seq_rgb_gamma, + seq_sleep_out, + }; + + static const unsigned int size_seq[] = { + ARRAY_SIZE(seq_password), + ARRAY_SIZE(seq_power), + ARRAY_SIZE(seq_display), + ARRAY_SIZE(seq_rgb_if), + ARRAY_SIZE(seq_display_inv), + ARRAY_SIZE(seq_vcom), + ARRAY_SIZE(seq_gate), + ARRAY_SIZE(seq_panel), + ARRAY_SIZE(seq_col_mod), + ARRAY_SIZE(seq_w_gamma), + ARRAY_SIZE(seq_rgb_gamma), + ARRAY_SIZE(seq_sleep_out), + }; + + for (i = 0; i < ARRAY_SIZE(init_seq); i++) { + ret = lms501kf03_panel_send_sequence(lcd, init_seq[i], + size_seq[i]); + if (ret) + break; + } + /* + * According to the datasheet, 120ms delay time is required. + * After sleep out sequence, command is blocked for 120ms. + * Thus, LDI should wait for 120ms. + */ + msleep(120); + + return ret; +} + +static int lms501kf03_ldi_enable(struct lms501kf03 *lcd) +{ + return lms501kf03_panel_send_sequence(lcd, seq_display_on, + ARRAY_SIZE(seq_display_on)); +} + +static int lms501kf03_ldi_disable(struct lms501kf03 *lcd) +{ + return lms501kf03_panel_send_sequence(lcd, seq_display_off, + ARRAY_SIZE(seq_display_off)); +} + +static int lms501kf03_power_is_on(int power) +{ + return (power) <= FB_BLANK_NORMAL; +} + +static int lms501kf03_power_on(struct lms501kf03 *lcd) +{ + int ret = 0; + struct lcd_platform_data *pd; + + pd = lcd->lcd_pd; + + if (!pd->power_on) { + dev_err(lcd->dev, "power_on is NULL.\n"); + return -EINVAL; + } else { + pd->power_on(lcd->ld, 1); + msleep(pd->power_on_delay); + } + + if (!pd->reset) { + dev_err(lcd->dev, "reset is NULL.\n"); + return -EINVAL; + } else { + pd->reset(lcd->ld); + msleep(pd->reset_delay); + } + + ret = lms501kf03_ldi_init(lcd); + if (ret) { + dev_err(lcd->dev, "failed to initialize ldi.\n"); + return ret; + } + + ret = lms501kf03_ldi_enable(lcd); + if (ret) { + dev_err(lcd->dev, "failed to enable ldi.\n"); + return ret; + } + + return 0; +} + +static int lms501kf03_power_off(struct lms501kf03 *lcd) +{ + int ret = 0; + struct lcd_platform_data *pd; + + pd = lcd->lcd_pd; + + ret = lms501kf03_ldi_disable(lcd); + if (ret) { + dev_err(lcd->dev, "lcd setting failed.\n"); + return -EIO; + } + + msleep(pd->power_off_delay); + + pd->power_on(lcd->ld, 0); + + return 0; +} + +static int lms501kf03_power(struct lms501kf03 *lcd, int power) +{ + int ret = 0; + + if (lms501kf03_power_is_on(power) && + !lms501kf03_power_is_on(lcd->power)) + ret = lms501kf03_power_on(lcd); + else if (!lms501kf03_power_is_on(power) && + lms501kf03_power_is_on(lcd->power)) + ret = lms501kf03_power_off(lcd); + + if (!ret) + lcd->power = power; + + return ret; +} + +static int lms501kf03_get_power(struct lcd_device *ld) +{ + struct lms501kf03 *lcd = lcd_get_data(ld); + + return lcd->power; +} + +static int lms501kf03_set_power(struct lcd_device *ld, int power) +{ + struct lms501kf03 *lcd = lcd_get_data(ld); + + if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && + power != FB_BLANK_NORMAL) { + dev_err(lcd->dev, "power value should be 0, 1 or 4.\n"); + return -EINVAL; + } + + return lms501kf03_power(lcd, power); +} + +static struct lcd_ops lms501kf03_lcd_ops = { + .get_power = lms501kf03_get_power, + .set_power = lms501kf03_set_power, +}; + +static int lms501kf03_probe(struct spi_device *spi) +{ + struct lms501kf03 *lcd = NULL; + struct lcd_device *ld = NULL; + int ret = 0; + + lcd = devm_kzalloc(&spi->dev, sizeof(struct lms501kf03), GFP_KERNEL); + if (!lcd) + return -ENOMEM; + + /* lms501kf03 lcd panel uses 3-wire 9-bit SPI Mode. */ + spi->bits_per_word = 9; + + ret = spi_setup(spi); + if (ret < 0) { + dev_err(&spi->dev, "spi setup failed.\n"); + return ret; + } + + lcd->spi = spi; + lcd->dev = &spi->dev; + + lcd->lcd_pd = dev_get_platdata(&spi->dev); + if (!lcd->lcd_pd) { + dev_err(&spi->dev, "platform data is NULL\n"); + return -EINVAL; + } + + ld = devm_lcd_device_register(&spi->dev, "lms501kf03", &spi->dev, lcd, + &lms501kf03_lcd_ops); + if (IS_ERR(ld)) + return PTR_ERR(ld); + + lcd->ld = ld; + + if (!lcd->lcd_pd->lcd_enabled) { + /* + * if lcd panel was off from bootloader then + * current lcd status is powerdown and then + * it enables lcd panel. + */ + lcd->power = FB_BLANK_POWERDOWN; + + lms501kf03_power(lcd, FB_BLANK_UNBLANK); + } else { + lcd->power = FB_BLANK_UNBLANK; + } + + spi_set_drvdata(spi, lcd); + + dev_info(&spi->dev, "lms501kf03 panel driver has been probed.\n"); + + return 0; +} + +static int lms501kf03_remove(struct spi_device *spi) +{ + struct lms501kf03 *lcd = spi_get_drvdata(spi); + + lms501kf03_power(lcd, FB_BLANK_POWERDOWN); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int lms501kf03_suspend(struct device *dev) +{ + struct lms501kf03 *lcd = dev_get_drvdata(dev); + + dev_dbg(dev, "lcd->power = %d\n", lcd->power); + + /* + * when lcd panel is suspend, lcd panel becomes off + * regardless of status. + */ + return lms501kf03_power(lcd, FB_BLANK_POWERDOWN); +} + +static int lms501kf03_resume(struct device *dev) +{ + struct lms501kf03 *lcd = dev_get_drvdata(dev); + + lcd->power = FB_BLANK_POWERDOWN; + + return lms501kf03_power(lcd, FB_BLANK_UNBLANK); +} +#endif + +static SIMPLE_DEV_PM_OPS(lms501kf03_pm_ops, lms501kf03_suspend, + lms501kf03_resume); + +static void lms501kf03_shutdown(struct spi_device *spi) +{ + struct lms501kf03 *lcd = spi_get_drvdata(spi); + + lms501kf03_power(lcd, FB_BLANK_POWERDOWN); +} + +static struct spi_driver lms501kf03_driver = { + .driver = { + .name = "lms501kf03", + .owner = THIS_MODULE, + .pm = &lms501kf03_pm_ops, + }, + .probe = lms501kf03_probe, + .remove = lms501kf03_remove, + .shutdown = lms501kf03_shutdown, +}; + +module_spi_driver(lms501kf03_driver); + +MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); +MODULE_DESCRIPTION("lms501kf03 LCD Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c index 6b488b8a7ee..6c3ec4259a6 100644 --- a/drivers/video/backlight/locomolcd.c +++ b/drivers/video/backlight/locomolcd.c @@ -2,11 +2,11 @@ * Backlight control code for Sharp Zaurus SL-5500 * * Copyright 2005 John Lenz <lenz@cs.wisc.edu> - * Maintainer: Pavel Machek <pavel@suse.cz> (unless John wants to :-) + * Maintainer: Pavel Machek <pavel@ucw.cz> (unless John wants to :-) * GPL v2 * * This driver assumes single CPU. That's okay, because collie is - * slightly old hardware, and noone is going to retrofit second CPU to + * slightly old hardware, and no one is going to retrofit second CPU to * old PDA. */ @@ -107,7 +107,6 @@ void locomolcd_power(int on) } EXPORT_SYMBOL(locomolcd_power); - static int current_intensity; static int locomolcd_set_intensity(struct backlight_device *bd) @@ -122,13 +121,25 @@ static int locomolcd_set_intensity(struct backlight_device *bd) intensity = 0; switch (intensity) { - /* AC and non-AC are handled differently, but produce same results in sharp code? */ - case 0: locomo_frontlight_set(locomolcd_dev, 0, 0, 161); break; - case 1: locomo_frontlight_set(locomolcd_dev, 117, 0, 161); break; - case 2: locomo_frontlight_set(locomolcd_dev, 163, 0, 148); break; - case 3: locomo_frontlight_set(locomolcd_dev, 194, 0, 161); break; - case 4: locomo_frontlight_set(locomolcd_dev, 194, 1, 161); break; - + /* + * AC and non-AC are handled differently, + * but produce same results in sharp code? + */ + case 0: + locomo_frontlight_set(locomolcd_dev, 0, 0, 161); + break; + case 1: + locomo_frontlight_set(locomolcd_dev, 117, 0, 161); + break; + case 2: + locomo_frontlight_set(locomolcd_dev, 163, 0, 148); + break; + case 3: + locomo_frontlight_set(locomolcd_dev, 194, 0, 161); + break; + case 4: + locomo_frontlight_set(locomolcd_dev, 194, 1, 161); + break; default: return -ENODEV; } @@ -141,32 +152,32 @@ static int locomolcd_get_intensity(struct backlight_device *bd) return current_intensity; } -static struct backlight_ops locomobl_data = { +static const struct backlight_ops locomobl_data = { .get_brightness = locomolcd_get_intensity, .update_status = locomolcd_set_intensity, }; -#ifdef CONFIG_PM -static int locomolcd_suspend(struct locomo_dev *dev, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int locomolcd_suspend(struct device *dev) { locomolcd_flags |= LOCOMOLCD_SUSPENDED; locomolcd_set_intensity(locomolcd_bl_device); return 0; } -static int locomolcd_resume(struct locomo_dev *dev) +static int locomolcd_resume(struct device *dev) { locomolcd_flags &= ~LOCOMOLCD_SUSPENDED; locomolcd_set_intensity(locomolcd_bl_device); return 0; } -#else -#define locomolcd_suspend NULL -#define locomolcd_resume NULL #endif +static SIMPLE_DEV_PM_OPS(locomolcd_pm_ops, locomolcd_suspend, locomolcd_resume); + static int locomolcd_probe(struct locomo_dev *ldev) { + struct backlight_properties props; unsigned long flags; local_irq_save(flags); @@ -174,21 +185,27 @@ static int locomolcd_probe(struct locomo_dev *ldev) locomo_gpio_set_dir(ldev->dev.parent, LOCOMO_GPIO_FL_VR, 0); - /* the poodle_lcd_power function is called for the first time + /* + * the poodle_lcd_power function is called for the first time * from fs_initcall, which is before locomo is activated. - * We need to recall poodle_lcd_power here*/ + * We need to recall poodle_lcd_power here + */ if (machine_is_poodle()) locomolcd_power(1); local_irq_restore(flags); - locomolcd_bl_device = backlight_device_register("locomo-bl", &ldev->dev, NULL, &locomobl_data); + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = 4; + locomolcd_bl_device = backlight_device_register("locomo-bl", + &ldev->dev, NULL, + &locomobl_data, &props); - if (IS_ERR (locomolcd_bl_device)) - return PTR_ERR (locomolcd_bl_device); + if (IS_ERR(locomolcd_bl_device)) + return PTR_ERR(locomolcd_bl_device); /* Set up frontlight so that screen is readable */ - locomolcd_bl_device->props.max_brightness = 4, locomolcd_bl_device->props.brightness = 2; locomolcd_set_intensity(locomolcd_bl_device); @@ -212,26 +229,17 @@ static int locomolcd_remove(struct locomo_dev *dev) static struct locomo_driver poodle_lcd_driver = { .drv = { - .name = "locomo-backlight", + .name = "locomo-backlight", + .pm = &locomolcd_pm_ops, }, .devid = LOCOMO_DEVID_BACKLIGHT, .probe = locomolcd_probe, .remove = locomolcd_remove, - .suspend = locomolcd_suspend, - .resume = locomolcd_resume, }; - static int __init locomolcd_init(void) { - int ret = locomo_driver_register(&poodle_lcd_driver); - if (ret) - return ret; - -#ifdef CONFIG_SA1100_COLLIE - sa1100fb_lcd_power = locomolcd_power; -#endif - return 0; + return locomo_driver_register(&poodle_lcd_driver); } static void __exit locomolcd_exit(void) @@ -242,6 +250,6 @@ static void __exit locomolcd_exit(void) module_init(locomolcd_init); module_exit(locomolcd_exit); -MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>, Pavel Machek <pavel@suse.cz>"); +MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>, Pavel Machek <pavel@ucw.cz>"); MODULE_DESCRIPTION("Collie LCD driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c new file mode 100644 index 00000000000..2ca3a040007 --- /dev/null +++ b/drivers/video/backlight/lp855x_bl.c @@ -0,0 +1,505 @@ +/* + * TI LP855x Backlight Driver + * + * Copyright (C) 2011 Texas Instruments + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/platform_data/lp855x.h> +#include <linux/pwm.h> + +/* LP8550/1/2/3/6 Registers */ +#define LP855X_BRIGHTNESS_CTRL 0x00 +#define LP855X_DEVICE_CTRL 0x01 +#define LP855X_EEPROM_START 0xA0 +#define LP855X_EEPROM_END 0xA7 +#define LP8556_EPROM_START 0xA0 +#define LP8556_EPROM_END 0xAF + +/* LP8555/7 Registers */ +#define LP8557_BL_CMD 0x00 +#define LP8557_BL_MASK 0x01 +#define LP8557_BL_ON 0x01 +#define LP8557_BL_OFF 0x00 +#define LP8557_BRIGHTNESS_CTRL 0x04 +#define LP8557_CONFIG 0x10 +#define LP8555_EPROM_START 0x10 +#define LP8555_EPROM_END 0x7A +#define LP8557_EPROM_START 0x10 +#define LP8557_EPROM_END 0x1E + +#define DEFAULT_BL_NAME "lcd-backlight" +#define MAX_BRIGHTNESS 255 + +enum lp855x_brightness_ctrl_mode { + PWM_BASED = 1, + REGISTER_BASED, +}; + +struct lp855x; + +/* + * struct lp855x_device_config + * @pre_init_device: init device function call before updating the brightness + * @reg_brightness: register address for brigthenss control + * @reg_devicectrl: register address for device control + * @post_init_device: late init device function call + */ +struct lp855x_device_config { + int (*pre_init_device)(struct lp855x *); + u8 reg_brightness; + u8 reg_devicectrl; + int (*post_init_device)(struct lp855x *); +}; + +struct lp855x { + const char *chipname; + enum lp855x_chip_id chip_id; + enum lp855x_brightness_ctrl_mode mode; + struct lp855x_device_config *cfg; + struct i2c_client *client; + struct backlight_device *bl; + struct device *dev; + struct lp855x_platform_data *pdata; + struct pwm_device *pwm; +}; + +static int lp855x_write_byte(struct lp855x *lp, u8 reg, u8 data) +{ + return i2c_smbus_write_byte_data(lp->client, reg, data); +} + +static int lp855x_update_bit(struct lp855x *lp, u8 reg, u8 mask, u8 data) +{ + int ret; + u8 tmp; + + ret = i2c_smbus_read_byte_data(lp->client, reg); + if (ret < 0) { + dev_err(lp->dev, "failed to read 0x%.2x\n", reg); + return ret; + } + + tmp = (u8)ret; + tmp &= ~mask; + tmp |= data & mask; + + return lp855x_write_byte(lp, reg, tmp); +} + +static bool lp855x_is_valid_rom_area(struct lp855x *lp, u8 addr) +{ + u8 start, end; + + switch (lp->chip_id) { + case LP8550: + case LP8551: + case LP8552: + case LP8553: + start = LP855X_EEPROM_START; + end = LP855X_EEPROM_END; + break; + case LP8556: + start = LP8556_EPROM_START; + end = LP8556_EPROM_END; + break; + case LP8555: + start = LP8555_EPROM_START; + end = LP8555_EPROM_END; + break; + case LP8557: + start = LP8557_EPROM_START; + end = LP8557_EPROM_END; + break; + default: + return false; + } + + return addr >= start && addr <= end; +} + +static int lp8557_bl_off(struct lp855x *lp) +{ + /* BL_ON = 0 before updating EPROM settings */ + return lp855x_update_bit(lp, LP8557_BL_CMD, LP8557_BL_MASK, + LP8557_BL_OFF); +} + +static int lp8557_bl_on(struct lp855x *lp) +{ + /* BL_ON = 1 after updating EPROM settings */ + return lp855x_update_bit(lp, LP8557_BL_CMD, LP8557_BL_MASK, + LP8557_BL_ON); +} + +static struct lp855x_device_config lp855x_dev_cfg = { + .reg_brightness = LP855X_BRIGHTNESS_CTRL, + .reg_devicectrl = LP855X_DEVICE_CTRL, +}; + +static struct lp855x_device_config lp8557_dev_cfg = { + .reg_brightness = LP8557_BRIGHTNESS_CTRL, + .reg_devicectrl = LP8557_CONFIG, + .pre_init_device = lp8557_bl_off, + .post_init_device = lp8557_bl_on, +}; + +/* + * Device specific configuration flow + * + * a) pre_init_device(optional) + * b) update the brightness register + * c) update device control register + * d) update ROM area(optional) + * e) post_init_device(optional) + * + */ +static int lp855x_configure(struct lp855x *lp) +{ + u8 val, addr; + int i, ret; + struct lp855x_platform_data *pd = lp->pdata; + + switch (lp->chip_id) { + case LP8550: + case LP8551: + case LP8552: + case LP8553: + case LP8556: + lp->cfg = &lp855x_dev_cfg; + break; + case LP8555: + case LP8557: + lp->cfg = &lp8557_dev_cfg; + break; + default: + return -EINVAL; + } + + if (lp->cfg->pre_init_device) { + ret = lp->cfg->pre_init_device(lp); + if (ret) { + dev_err(lp->dev, "pre init device err: %d\n", ret); + goto err; + } + } + + val = pd->initial_brightness; + ret = lp855x_write_byte(lp, lp->cfg->reg_brightness, val); + if (ret) + goto err; + + val = pd->device_control; + ret = lp855x_write_byte(lp, lp->cfg->reg_devicectrl, val); + if (ret) + goto err; + + if (pd->size_program > 0) { + for (i = 0; i < pd->size_program; i++) { + addr = pd->rom_data[i].addr; + val = pd->rom_data[i].val; + if (!lp855x_is_valid_rom_area(lp, addr)) + continue; + + ret = lp855x_write_byte(lp, addr, val); + if (ret) + goto err; + } + } + + if (lp->cfg->post_init_device) { + ret = lp->cfg->post_init_device(lp); + if (ret) { + dev_err(lp->dev, "post init device err: %d\n", ret); + goto err; + } + } + + return 0; + +err: + return ret; +} + +static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br) +{ + unsigned int period = lp->pdata->period_ns; + unsigned int duty = br * period / max_br; + struct pwm_device *pwm; + + /* request pwm device with the consumer name */ + if (!lp->pwm) { + pwm = devm_pwm_get(lp->dev, lp->chipname); + if (IS_ERR(pwm)) + return; + + lp->pwm = pwm; + } + + pwm_config(lp->pwm, duty, period); + if (duty) + pwm_enable(lp->pwm); + else + pwm_disable(lp->pwm); +} + +static int lp855x_bl_update_status(struct backlight_device *bl) +{ + struct lp855x *lp = bl_get_data(bl); + + if (bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + bl->props.brightness = 0; + + if (lp->mode == PWM_BASED) { + int br = bl->props.brightness; + int max_br = bl->props.max_brightness; + + lp855x_pwm_ctrl(lp, br, max_br); + + } else if (lp->mode == REGISTER_BASED) { + u8 val = bl->props.brightness; + lp855x_write_byte(lp, lp->cfg->reg_brightness, val); + } + + return 0; +} + +static int lp855x_bl_get_brightness(struct backlight_device *bl) +{ + return bl->props.brightness; +} + +static const struct backlight_ops lp855x_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lp855x_bl_update_status, + .get_brightness = lp855x_bl_get_brightness, +}; + +static int lp855x_backlight_register(struct lp855x *lp) +{ + struct backlight_device *bl; + struct backlight_properties props; + struct lp855x_platform_data *pdata = lp->pdata; + const char *name = pdata->name ? : DEFAULT_BL_NAME; + + props.type = BACKLIGHT_PLATFORM; + props.max_brightness = MAX_BRIGHTNESS; + + if (pdata->initial_brightness > props.max_brightness) + pdata->initial_brightness = props.max_brightness; + + props.brightness = pdata->initial_brightness; + + bl = devm_backlight_device_register(lp->dev, name, lp->dev, lp, + &lp855x_bl_ops, &props); + if (IS_ERR(bl)) + return PTR_ERR(bl); + + lp->bl = bl; + + return 0; +} + +static ssize_t lp855x_get_chip_id(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp855x *lp = dev_get_drvdata(dev); + return scnprintf(buf, PAGE_SIZE, "%s\n", lp->chipname); +} + +static ssize_t lp855x_get_bl_ctl_mode(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp855x *lp = dev_get_drvdata(dev); + char *strmode = NULL; + + if (lp->mode == PWM_BASED) + strmode = "pwm based"; + else if (lp->mode == REGISTER_BASED) + strmode = "register based"; + + return scnprintf(buf, PAGE_SIZE, "%s\n", strmode); +} + +static DEVICE_ATTR(chip_id, S_IRUGO, lp855x_get_chip_id, NULL); +static DEVICE_ATTR(bl_ctl_mode, S_IRUGO, lp855x_get_bl_ctl_mode, NULL); + +static struct attribute *lp855x_attributes[] = { + &dev_attr_chip_id.attr, + &dev_attr_bl_ctl_mode.attr, + NULL, +}; + +static const struct attribute_group lp855x_attr_group = { + .attrs = lp855x_attributes, +}; + +#ifdef CONFIG_OF +static int lp855x_parse_dt(struct device *dev, struct device_node *node) +{ + struct lp855x_platform_data *pdata; + int rom_length; + + if (!node) { + dev_err(dev, "no platform data\n"); + return -EINVAL; + } + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + of_property_read_string(node, "bl-name", &pdata->name); + of_property_read_u8(node, "dev-ctrl", &pdata->device_control); + of_property_read_u8(node, "init-brt", &pdata->initial_brightness); + of_property_read_u32(node, "pwm-period", &pdata->period_ns); + + /* Fill ROM platform data if defined */ + rom_length = of_get_child_count(node); + if (rom_length > 0) { + struct lp855x_rom_data *rom; + struct device_node *child; + int i = 0; + + rom = devm_kzalloc(dev, sizeof(*rom) * rom_length, GFP_KERNEL); + if (!rom) + return -ENOMEM; + + for_each_child_of_node(node, child) { + of_property_read_u8(child, "rom-addr", &rom[i].addr); + of_property_read_u8(child, "rom-val", &rom[i].val); + i++; + } + + pdata->size_program = rom_length; + pdata->rom_data = &rom[0]; + } + + dev->platform_data = pdata; + + return 0; +} +#else +static int lp855x_parse_dt(struct device *dev, struct device_node *node) +{ + return -EINVAL; +} +#endif + +static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id) +{ + struct lp855x *lp; + struct lp855x_platform_data *pdata = dev_get_platdata(&cl->dev); + struct device_node *node = cl->dev.of_node; + int ret; + + if (!pdata) { + ret = lp855x_parse_dt(&cl->dev, node); + if (ret < 0) + return ret; + + pdata = dev_get_platdata(&cl->dev); + } + + if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) + return -EIO; + + lp = devm_kzalloc(&cl->dev, sizeof(struct lp855x), GFP_KERNEL); + if (!lp) + return -ENOMEM; + + if (pdata->period_ns > 0) + lp->mode = PWM_BASED; + else + lp->mode = REGISTER_BASED; + + lp->client = cl; + lp->dev = &cl->dev; + lp->pdata = pdata; + lp->chipname = id->name; + lp->chip_id = id->driver_data; + i2c_set_clientdata(cl, lp); + + ret = lp855x_configure(lp); + if (ret) { + dev_err(lp->dev, "device config err: %d", ret); + return ret; + } + + ret = lp855x_backlight_register(lp); + if (ret) { + dev_err(lp->dev, + "failed to register backlight. err: %d\n", ret); + return ret; + } + + ret = sysfs_create_group(&lp->dev->kobj, &lp855x_attr_group); + if (ret) { + dev_err(lp->dev, "failed to register sysfs. err: %d\n", ret); + return ret; + } + + backlight_update_status(lp->bl); + return 0; +} + +static int lp855x_remove(struct i2c_client *cl) +{ + struct lp855x *lp = i2c_get_clientdata(cl); + + lp->bl->props.brightness = 0; + backlight_update_status(lp->bl); + sysfs_remove_group(&lp->dev->kobj, &lp855x_attr_group); + + return 0; +} + +static const struct of_device_id lp855x_dt_ids[] = { + { .compatible = "ti,lp8550", }, + { .compatible = "ti,lp8551", }, + { .compatible = "ti,lp8552", }, + { .compatible = "ti,lp8553", }, + { .compatible = "ti,lp8555", }, + { .compatible = "ti,lp8556", }, + { .compatible = "ti,lp8557", }, + { } +}; +MODULE_DEVICE_TABLE(of, lp855x_dt_ids); + +static const struct i2c_device_id lp855x_ids[] = { + {"lp8550", LP8550}, + {"lp8551", LP8551}, + {"lp8552", LP8552}, + {"lp8553", LP8553}, + {"lp8555", LP8555}, + {"lp8556", LP8556}, + {"lp8557", LP8557}, + { } +}; +MODULE_DEVICE_TABLE(i2c, lp855x_ids); + +static struct i2c_driver lp855x_driver = { + .driver = { + .name = "lp855x", + .of_match_table = of_match_ptr(lp855x_dt_ids), + }, + .probe = lp855x_probe, + .remove = lp855x_remove, + .id_table = lp855x_ids, +}; + +module_i2c_driver(lp855x_driver); + +MODULE_DESCRIPTION("Texas Instruments LP855x Backlight driver"); +MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/lp8788_bl.c b/drivers/video/backlight/lp8788_bl.c new file mode 100644 index 00000000000..daba34dc46d --- /dev/null +++ b/drivers/video/backlight/lp8788_bl.c @@ -0,0 +1,332 @@ +/* + * TI LP8788 MFD - backlight driver + * + * Copyright 2012 Texas Instruments + * + * Author: Milo(Woogyom) Kim <milo.kim@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/mfd/lp8788.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pwm.h> +#include <linux/slab.h> + +/* Register address */ +#define LP8788_BL_CONFIG 0x96 +#define LP8788_BL_EN BIT(0) +#define LP8788_BL_PWM_INPUT_EN BIT(5) +#define LP8788_BL_FULLSCALE_SHIFT 2 +#define LP8788_BL_DIM_MODE_SHIFT 1 +#define LP8788_BL_PWM_POLARITY_SHIFT 6 + +#define LP8788_BL_BRIGHTNESS 0x97 + +#define LP8788_BL_RAMP 0x98 +#define LP8788_BL_RAMP_RISE_SHIFT 4 + +#define MAX_BRIGHTNESS 127 +#define DEFAULT_BL_NAME "lcd-backlight" + +struct lp8788_bl_config { + enum lp8788_bl_ctrl_mode bl_mode; + enum lp8788_bl_dim_mode dim_mode; + enum lp8788_bl_full_scale_current full_scale; + enum lp8788_bl_ramp_step rise_time; + enum lp8788_bl_ramp_step fall_time; + enum pwm_polarity pwm_pol; +}; + +struct lp8788_bl { + struct lp8788 *lp; + struct backlight_device *bl_dev; + struct lp8788_backlight_platform_data *pdata; + enum lp8788_bl_ctrl_mode mode; + struct pwm_device *pwm; +}; + +static struct lp8788_bl_config default_bl_config = { + .bl_mode = LP8788_BL_REGISTER_ONLY, + .dim_mode = LP8788_DIM_EXPONENTIAL, + .full_scale = LP8788_FULLSCALE_1900uA, + .rise_time = LP8788_RAMP_8192us, + .fall_time = LP8788_RAMP_8192us, + .pwm_pol = PWM_POLARITY_NORMAL, +}; + +static inline bool is_brightness_ctrl_by_pwm(enum lp8788_bl_ctrl_mode mode) +{ + return mode == LP8788_BL_COMB_PWM_BASED; +} + +static inline bool is_brightness_ctrl_by_register(enum lp8788_bl_ctrl_mode mode) +{ + return mode == LP8788_BL_REGISTER_ONLY || + mode == LP8788_BL_COMB_REGISTER_BASED; +} + +static int lp8788_backlight_configure(struct lp8788_bl *bl) +{ + struct lp8788_backlight_platform_data *pdata = bl->pdata; + struct lp8788_bl_config *cfg = &default_bl_config; + int ret; + u8 val; + + /* + * Update chip configuration if platform data exists, + * otherwise use the default settings. + */ + if (pdata) { + cfg->bl_mode = pdata->bl_mode; + cfg->dim_mode = pdata->dim_mode; + cfg->full_scale = pdata->full_scale; + cfg->rise_time = pdata->rise_time; + cfg->fall_time = pdata->fall_time; + cfg->pwm_pol = pdata->pwm_pol; + } + + /* Brightness ramp up/down */ + val = (cfg->rise_time << LP8788_BL_RAMP_RISE_SHIFT) | cfg->fall_time; + ret = lp8788_write_byte(bl->lp, LP8788_BL_RAMP, val); + if (ret) + return ret; + + /* Fullscale current setting */ + val = (cfg->full_scale << LP8788_BL_FULLSCALE_SHIFT) | + (cfg->dim_mode << LP8788_BL_DIM_MODE_SHIFT); + + /* Brightness control mode */ + switch (cfg->bl_mode) { + case LP8788_BL_REGISTER_ONLY: + val |= LP8788_BL_EN; + break; + case LP8788_BL_COMB_PWM_BASED: + case LP8788_BL_COMB_REGISTER_BASED: + val |= LP8788_BL_EN | LP8788_BL_PWM_INPUT_EN | + (cfg->pwm_pol << LP8788_BL_PWM_POLARITY_SHIFT); + break; + default: + dev_err(bl->lp->dev, "invalid mode: %d\n", cfg->bl_mode); + return -EINVAL; + } + + bl->mode = cfg->bl_mode; + + return lp8788_write_byte(bl->lp, LP8788_BL_CONFIG, val); +} + +static void lp8788_pwm_ctrl(struct lp8788_bl *bl, int br, int max_br) +{ + unsigned int period; + unsigned int duty; + struct device *dev; + struct pwm_device *pwm; + + if (!bl->pdata) + return; + + period = bl->pdata->period_ns; + duty = br * period / max_br; + dev = bl->lp->dev; + + /* request PWM device with the consumer name */ + if (!bl->pwm) { + pwm = devm_pwm_get(dev, LP8788_DEV_BACKLIGHT); + if (IS_ERR(pwm)) { + dev_err(dev, "can not get PWM device\n"); + return; + } + + bl->pwm = pwm; + } + + pwm_config(bl->pwm, duty, period); + if (duty) + pwm_enable(bl->pwm); + else + pwm_disable(bl->pwm); +} + +static int lp8788_bl_update_status(struct backlight_device *bl_dev) +{ + struct lp8788_bl *bl = bl_get_data(bl_dev); + enum lp8788_bl_ctrl_mode mode = bl->mode; + + if (bl_dev->props.state & BL_CORE_SUSPENDED) + bl_dev->props.brightness = 0; + + if (is_brightness_ctrl_by_pwm(mode)) { + int brt = bl_dev->props.brightness; + int max = bl_dev->props.max_brightness; + + lp8788_pwm_ctrl(bl, brt, max); + } else if (is_brightness_ctrl_by_register(mode)) { + u8 brt = bl_dev->props.brightness; + + lp8788_write_byte(bl->lp, LP8788_BL_BRIGHTNESS, brt); + } + + return 0; +} + +static int lp8788_bl_get_brightness(struct backlight_device *bl_dev) +{ + return bl_dev->props.brightness; +} + +static const struct backlight_ops lp8788_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lp8788_bl_update_status, + .get_brightness = lp8788_bl_get_brightness, +}; + +static int lp8788_backlight_register(struct lp8788_bl *bl) +{ + struct backlight_device *bl_dev; + struct backlight_properties props; + struct lp8788_backlight_platform_data *pdata = bl->pdata; + int init_brt; + char *name; + + props.type = BACKLIGHT_PLATFORM; + props.max_brightness = MAX_BRIGHTNESS; + + /* Initial brightness */ + if (pdata) + init_brt = min_t(int, pdata->initial_brightness, + props.max_brightness); + else + init_brt = 0; + + props.brightness = init_brt; + + /* Backlight device name */ + if (!pdata || !pdata->name) + name = DEFAULT_BL_NAME; + else + name = pdata->name; + + bl_dev = backlight_device_register(name, bl->lp->dev, bl, + &lp8788_bl_ops, &props); + if (IS_ERR(bl_dev)) + return PTR_ERR(bl_dev); + + bl->bl_dev = bl_dev; + + return 0; +} + +static void lp8788_backlight_unregister(struct lp8788_bl *bl) +{ + struct backlight_device *bl_dev = bl->bl_dev; + + if (bl_dev) + backlight_device_unregister(bl_dev); +} + +static ssize_t lp8788_get_bl_ctl_mode(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp8788_bl *bl = dev_get_drvdata(dev); + enum lp8788_bl_ctrl_mode mode = bl->mode; + char *strmode; + + if (is_brightness_ctrl_by_pwm(mode)) + strmode = "PWM based"; + else if (is_brightness_ctrl_by_register(mode)) + strmode = "Register based"; + else + strmode = "Invalid mode"; + + return scnprintf(buf, PAGE_SIZE, "%s\n", strmode); +} + +static DEVICE_ATTR(bl_ctl_mode, S_IRUGO, lp8788_get_bl_ctl_mode, NULL); + +static struct attribute *lp8788_attributes[] = { + &dev_attr_bl_ctl_mode.attr, + NULL, +}; + +static const struct attribute_group lp8788_attr_group = { + .attrs = lp8788_attributes, +}; + +static int lp8788_backlight_probe(struct platform_device *pdev) +{ + struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent); + struct lp8788_bl *bl; + int ret; + + bl = devm_kzalloc(lp->dev, sizeof(struct lp8788_bl), GFP_KERNEL); + if (!bl) + return -ENOMEM; + + bl->lp = lp; + if (lp->pdata) + bl->pdata = lp->pdata->bl_pdata; + + platform_set_drvdata(pdev, bl); + + ret = lp8788_backlight_configure(bl); + if (ret) { + dev_err(lp->dev, "backlight config err: %d\n", ret); + goto err_dev; + } + + ret = lp8788_backlight_register(bl); + if (ret) { + dev_err(lp->dev, "register backlight err: %d\n", ret); + goto err_dev; + } + + ret = sysfs_create_group(&pdev->dev.kobj, &lp8788_attr_group); + if (ret) { + dev_err(lp->dev, "register sysfs err: %d\n", ret); + goto err_sysfs; + } + + backlight_update_status(bl->bl_dev); + + return 0; + +err_sysfs: + lp8788_backlight_unregister(bl); +err_dev: + return ret; +} + +static int lp8788_backlight_remove(struct platform_device *pdev) +{ + struct lp8788_bl *bl = platform_get_drvdata(pdev); + struct backlight_device *bl_dev = bl->bl_dev; + + bl_dev->props.brightness = 0; + backlight_update_status(bl_dev); + sysfs_remove_group(&pdev->dev.kobj, &lp8788_attr_group); + lp8788_backlight_unregister(bl); + + return 0; +} + +static struct platform_driver lp8788_bl_driver = { + .probe = lp8788_backlight_probe, + .remove = lp8788_backlight_remove, + .driver = { + .name = LP8788_DEV_BACKLIGHT, + .owner = THIS_MODULE, + }, +}; +module_platform_driver(lp8788_bl_driver); + +MODULE_DESCRIPTION("Texas Instruments LP8788 Backlight Driver"); +MODULE_AUTHOR("Milo Kim"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lp8788-backlight"); diff --git a/drivers/video/backlight/ltv350qv.c b/drivers/video/backlight/ltv350qv.c index 2eb206bf73e..383f550e165 100644 --- a/drivers/video/backlight/ltv350qv.c +++ b/drivers/video/backlight/ltv350qv.c @@ -13,6 +13,7 @@ #include <linux/init.h> #include <linux/lcd.h> #include <linux/module.h> +#include <linux/slab.h> #include <linux/spi/spi.h> #include "ltv350qv.h" @@ -74,7 +75,7 @@ static int ltv350qv_power_on(struct ltv350qv *lcd) /* Power On Reset Display off State */ if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, 0x0000)) goto err; - msleep(15); + usleep_range(15000, 16000); /* Power Setting Function 1 */ if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE)) @@ -152,7 +153,7 @@ err_settings: err_power2: err_power1: ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000); - msleep(1); + usleep_range(1000, 1100); err: ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE); return -EIO; @@ -174,7 +175,7 @@ static int ltv350qv_power_off(struct ltv350qv *lcd) ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000); /* Wait at least 1 ms */ - msleep(1); + usleep_range(1000, 1100); /* Power down setting 2 */ ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE); @@ -225,76 +226,68 @@ static struct lcd_ops ltv_ops = { .set_power = ltv350qv_set_power, }; -static int __devinit ltv350qv_probe(struct spi_device *spi) +static int ltv350qv_probe(struct spi_device *spi) { struct ltv350qv *lcd; struct lcd_device *ld; int ret; - lcd = kzalloc(sizeof(struct ltv350qv), GFP_KERNEL); + lcd = devm_kzalloc(&spi->dev, sizeof(struct ltv350qv), GFP_KERNEL); if (!lcd) return -ENOMEM; lcd->spi = spi; lcd->power = FB_BLANK_POWERDOWN; - lcd->buffer = kzalloc(8, GFP_KERNEL); + lcd->buffer = devm_kzalloc(&spi->dev, 8, GFP_KERNEL); + if (!lcd->buffer) + return -ENOMEM; + + ld = devm_lcd_device_register(&spi->dev, "ltv350qv", &spi->dev, lcd, + <v_ops); + if (IS_ERR(ld)) + return PTR_ERR(ld); - ld = lcd_device_register("ltv350qv", &spi->dev, lcd, <v_ops); - if (IS_ERR(ld)) { - ret = PTR_ERR(ld); - goto out_free_lcd; - } lcd->ld = ld; ret = ltv350qv_power(lcd, FB_BLANK_UNBLANK); if (ret) - goto out_unregister; + return ret; - dev_set_drvdata(&spi->dev, lcd); + spi_set_drvdata(spi, lcd); return 0; - -out_unregister: - lcd_device_unregister(ld); -out_free_lcd: - kfree(lcd); - return ret; } -static int __devexit ltv350qv_remove(struct spi_device *spi) +static int ltv350qv_remove(struct spi_device *spi) { - struct ltv350qv *lcd = dev_get_drvdata(&spi->dev); + struct ltv350qv *lcd = spi_get_drvdata(spi); ltv350qv_power(lcd, FB_BLANK_POWERDOWN); - lcd_device_unregister(lcd->ld); - kfree(lcd); - return 0; } -#ifdef CONFIG_PM -static int ltv350qv_suspend(struct spi_device *spi, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int ltv350qv_suspend(struct device *dev) { - struct ltv350qv *lcd = dev_get_drvdata(&spi->dev); + struct ltv350qv *lcd = dev_get_drvdata(dev); return ltv350qv_power(lcd, FB_BLANK_POWERDOWN); } -static int ltv350qv_resume(struct spi_device *spi) +static int ltv350qv_resume(struct device *dev) { - struct ltv350qv *lcd = dev_get_drvdata(&spi->dev); + struct ltv350qv *lcd = dev_get_drvdata(dev); return ltv350qv_power(lcd, FB_BLANK_UNBLANK); } -#else -#define ltv350qv_suspend NULL -#define ltv350qv_resume NULL #endif +static SIMPLE_DEV_PM_OPS(ltv350qv_pm_ops, ltv350qv_suspend, ltv350qv_resume); + /* Power down all displays on reboot, poweroff or halt */ static void ltv350qv_shutdown(struct spi_device *spi) { - struct ltv350qv *lcd = dev_get_drvdata(&spi->dev); + struct ltv350qv *lcd = spi_get_drvdata(spi); ltv350qv_power(lcd, FB_BLANK_POWERDOWN); } @@ -302,29 +295,18 @@ static void ltv350qv_shutdown(struct spi_device *spi) static struct spi_driver ltv350qv_driver = { .driver = { .name = "ltv350qv", - .bus = &spi_bus_type, .owner = THIS_MODULE, + .pm = <v350qv_pm_ops, }, .probe = ltv350qv_probe, - .remove = __devexit_p(ltv350qv_remove), + .remove = ltv350qv_remove, .shutdown = ltv350qv_shutdown, - .suspend = ltv350qv_suspend, - .resume = ltv350qv_resume, }; -static int __init ltv350qv_init(void) -{ - return spi_register_driver(<v350qv_driver); -} - -static void __exit ltv350qv_exit(void) -{ - spi_unregister_driver(<v350qv_driver); -} -module_init(ltv350qv_init); -module_exit(ltv350qv_exit); +module_spi_driver(ltv350qv_driver); -MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>"); +MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver"); MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:ltv350qv"); diff --git a/drivers/video/backlight/lv5207lp.c b/drivers/video/backlight/lv5207lp.c new file mode 100644 index 00000000000..1802b2d1357 --- /dev/null +++ b/drivers/video/backlight/lv5207lp.c @@ -0,0 +1,170 @@ +/* + * Sanyo LV5207LP LED Driver + * + * Copyright (C) 2013 Ideas on board SPRL + * + * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/platform_data/lv5207lp.h> +#include <linux/slab.h> + +#define LV5207LP_CTRL1 0x00 +#define LV5207LP_CPSW (1 << 7) +#define LV5207LP_SCTEN (1 << 6) +#define LV5207LP_C10 (1 << 5) +#define LV5207LP_CKSW (1 << 4) +#define LV5207LP_RSW (1 << 3) +#define LV5207LP_GSW (1 << 2) +#define LV5207LP_BSW (1 << 1) +#define LV5207LP_CTRL2 0x01 +#define LV5207LP_MSW (1 << 7) +#define LV5207LP_MLED4 (1 << 6) +#define LV5207LP_RED 0x02 +#define LV5207LP_GREEN 0x03 +#define LV5207LP_BLUE 0x04 + +#define LV5207LP_MAX_BRIGHTNESS 32 + +struct lv5207lp { + struct i2c_client *client; + struct backlight_device *backlight; + struct lv5207lp_platform_data *pdata; +}; + +static int lv5207lp_write(struct lv5207lp *lv, u8 reg, u8 data) +{ + return i2c_smbus_write_byte_data(lv->client, reg, data); +} + +static int lv5207lp_backlight_update_status(struct backlight_device *backlight) +{ + struct lv5207lp *lv = bl_get_data(backlight); + int brightness = backlight->props.brightness; + + if (backlight->props.power != FB_BLANK_UNBLANK || + backlight->props.fb_blank != FB_BLANK_UNBLANK || + backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + brightness = 0; + + if (brightness) { + lv5207lp_write(lv, LV5207LP_CTRL1, + LV5207LP_CPSW | LV5207LP_C10 | LV5207LP_CKSW); + lv5207lp_write(lv, LV5207LP_CTRL2, + LV5207LP_MSW | LV5207LP_MLED4 | + (brightness - 1)); + } else { + lv5207lp_write(lv, LV5207LP_CTRL1, 0); + lv5207lp_write(lv, LV5207LP_CTRL2, 0); + } + + return 0; +} + +static int lv5207lp_backlight_get_brightness(struct backlight_device *backlight) +{ + return backlight->props.brightness; +} + +static int lv5207lp_backlight_check_fb(struct backlight_device *backlight, + struct fb_info *info) +{ + struct lv5207lp *lv = bl_get_data(backlight); + + return lv->pdata->fbdev == NULL || lv->pdata->fbdev == info->dev; +} + +static const struct backlight_ops lv5207lp_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lv5207lp_backlight_update_status, + .get_brightness = lv5207lp_backlight_get_brightness, + .check_fb = lv5207lp_backlight_check_fb, +}; + +static int lv5207lp_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lv5207lp_platform_data *pdata = dev_get_platdata(&client->dev); + struct backlight_device *backlight; + struct backlight_properties props; + struct lv5207lp *lv; + + if (pdata == NULL) { + dev_err(&client->dev, "No platform data supplied\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_warn(&client->dev, + "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n"); + return -EIO; + } + + lv = devm_kzalloc(&client->dev, sizeof(*lv), GFP_KERNEL); + if (!lv) + return -ENOMEM; + + lv->client = client; + lv->pdata = pdata; + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = min_t(unsigned int, pdata->max_value, + LV5207LP_MAX_BRIGHTNESS); + props.brightness = clamp_t(unsigned int, pdata->def_value, 0, + props.max_brightness); + + backlight = devm_backlight_device_register(&client->dev, + dev_name(&client->dev), &lv->client->dev, + lv, &lv5207lp_backlight_ops, &props); + if (IS_ERR(backlight)) { + dev_err(&client->dev, "failed to register backlight\n"); + return PTR_ERR(backlight); + } + + backlight_update_status(backlight); + i2c_set_clientdata(client, backlight); + + return 0; +} + +static int lv5207lp_remove(struct i2c_client *client) +{ + struct backlight_device *backlight = i2c_get_clientdata(client); + + backlight->props.brightness = 0; + backlight_update_status(backlight); + + return 0; +} + +static const struct i2c_device_id lv5207lp_ids[] = { + { "lv5207lp", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lv5207lp_ids); + +static struct i2c_driver lv5207lp_driver = { + .driver = { + .name = "lv5207lp", + }, + .probe = lv5207lp_probe, + .remove = lv5207lp_remove, + .id_table = lv5207lp_ids, +}; + +module_i2c_driver(lv5207lp_driver); + +MODULE_DESCRIPTION("Sanyo LV5207LP Backlight Driver"); +MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c new file mode 100644 index 00000000000..66fa08c920d --- /dev/null +++ b/drivers/video/backlight/max8925_bl.c @@ -0,0 +1,210 @@ +/* + * Backlight driver for Maxim MAX8925 + * + * Copyright (C) 2009 Marvell International Ltd. + * Haojian Zhuang <haojian.zhuang@marvell.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/fb.h> +#include <linux/i2c.h> +#include <linux/backlight.h> +#include <linux/mfd/max8925.h> +#include <linux/slab.h> +#include <linux/module.h> + +#define MAX_BRIGHTNESS (0xff) +#define MIN_BRIGHTNESS (0) + +#define LWX_FREQ(x) (((x - 601) / 100) & 0x7) + +struct max8925_backlight_data { + struct max8925_chip *chip; + + int current_brightness; + int reg_mode_cntl; + int reg_cntl; +}; + +static int max8925_backlight_set(struct backlight_device *bl, int brightness) +{ + struct max8925_backlight_data *data = bl_get_data(bl); + struct max8925_chip *chip = data->chip; + unsigned char value; + int ret; + + if (brightness > MAX_BRIGHTNESS) + value = MAX_BRIGHTNESS; + else + value = brightness; + + ret = max8925_reg_write(chip->i2c, data->reg_cntl, value); + if (ret < 0) + goto out; + + if (!data->current_brightness && brightness) + /* enable WLED output */ + ret = max8925_set_bits(chip->i2c, data->reg_mode_cntl, 1, 1); + else if (!brightness) + /* disable WLED output */ + ret = max8925_set_bits(chip->i2c, data->reg_mode_cntl, 1, 0); + if (ret < 0) + goto out; + dev_dbg(chip->dev, "set brightness %d\n", value); + data->current_brightness = value; + return 0; +out: + dev_dbg(chip->dev, "set brightness %d failure with return value:%d\n", + value, ret); + return ret; +} + +static int max8925_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.state & BL_CORE_SUSPENDED) + brightness = 0; + + return max8925_backlight_set(bl, brightness); +} + +static int max8925_backlight_get_brightness(struct backlight_device *bl) +{ + struct max8925_backlight_data *data = bl_get_data(bl); + struct max8925_chip *chip = data->chip; + int ret; + + ret = max8925_reg_read(chip->i2c, data->reg_cntl); + if (ret < 0) + return -EINVAL; + data->current_brightness = ret; + dev_dbg(chip->dev, "get brightness %d\n", data->current_brightness); + return ret; +} + +static const struct backlight_ops max8925_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = max8925_backlight_update_status, + .get_brightness = max8925_backlight_get_brightness, +}; + +static void max8925_backlight_dt_init(struct platform_device *pdev) +{ + struct device_node *nproot = pdev->dev.parent->of_node, *np; + struct max8925_backlight_pdata *pdata; + u32 val; + + if (!nproot || !IS_ENABLED(CONFIG_OF)) + return; + + pdata = devm_kzalloc(&pdev->dev, + sizeof(struct max8925_backlight_pdata), + GFP_KERNEL); + if (!pdata) + return; + + np = of_find_node_by_name(nproot, "backlight"); + if (!np) { + dev_err(&pdev->dev, "failed to find backlight node\n"); + return; + } + + if (!of_property_read_u32(np, "maxim,max8925-dual-string", &val)) + pdata->dual_string = val; + + pdev->dev.platform_data = pdata; +} + +static int max8925_backlight_probe(struct platform_device *pdev) +{ + struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent); + struct max8925_backlight_pdata *pdata; + struct max8925_backlight_data *data; + struct backlight_device *bl; + struct backlight_properties props; + struct resource *res; + unsigned char value; + int ret = 0; + + data = devm_kzalloc(&pdev->dev, sizeof(struct max8925_backlight_data), + GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_REG, 0); + if (!res) { + dev_err(&pdev->dev, "No REG resource for mode control!\n"); + return -ENXIO; + } + data->reg_mode_cntl = res->start; + res = platform_get_resource(pdev, IORESOURCE_REG, 1); + if (!res) { + dev_err(&pdev->dev, "No REG resource for control!\n"); + return -ENXIO; + } + data->reg_cntl = res->start; + + data->chip = chip; + data->current_brightness = 0; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = MAX_BRIGHTNESS; + bl = devm_backlight_device_register(&pdev->dev, "max8925-backlight", + &pdev->dev, data, + &max8925_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + bl->props.brightness = MAX_BRIGHTNESS; + + platform_set_drvdata(pdev, bl); + + value = 0; + if (!pdev->dev.platform_data) + max8925_backlight_dt_init(pdev); + + pdata = pdev->dev.platform_data; + if (pdata) { + if (pdata->lxw_scl) + value |= (1 << 7); + if (pdata->lxw_freq) + value |= (LWX_FREQ(pdata->lxw_freq) << 4); + if (pdata->dual_string) + value |= (1 << 1); + } + ret = max8925_set_bits(chip->i2c, data->reg_mode_cntl, 0xfe, value); + if (ret < 0) + return ret; + backlight_update_status(bl); + return 0; +} + +static struct platform_driver max8925_backlight_driver = { + .driver = { + .name = "max8925-backlight", + .owner = THIS_MODULE, + }, + .probe = max8925_backlight_probe, +}; + +module_platform_driver(max8925_backlight_driver); + +MODULE_DESCRIPTION("Backlight Driver for Maxim MAX8925"); +MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:max8925-backlight"); diff --git a/drivers/video/backlight/mbp_nvidia_bl.c b/drivers/video/backlight/mbp_nvidia_bl.c deleted file mode 100644 index 385cba40ea8..00000000000 --- a/drivers/video/backlight/mbp_nvidia_bl.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Backlight Driver for Nvidia 8600 in Macbook Pro - * - * Copyright (c) Red Hat <mjg@redhat.com> - * Based on code from Pommed: - * Copyright (C) 2006 Nicolas Boichat <nicolas @boichat.ch> - * Copyright (C) 2006 Felipe Alfaro Solana <felipe_alfaro @linuxmail.org> - * Copyright (C) 2007 Julien BLACHE <jb@jblache.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This driver triggers SMIs which cause the firmware to change the - * backlight brightness. This is icky in many ways, but it's impractical to - * get at the firmware code in order to figure out what it's actually doing. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/backlight.h> -#include <linux/err.h> -#include <linux/dmi.h> -#include <linux/io.h> - -static struct backlight_device *mbp_backlight_device; - -static struct dmi_system_id __initdata mbp_device_table[] = { - { - .ident = "3,1", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), - DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,1"), - }, - }, - { - .ident = "3,2", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), - DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,2"), - }, - }, - { - .ident = "4,1", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), - DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro4,1"), - }, - }, - { } -}; - -static int mbp_send_intensity(struct backlight_device *bd) -{ - int intensity = bd->props.brightness; - - outb(0x04 | (intensity << 4), 0xb3); - outb(0xbf, 0xb2); - - return 0; -} - -static int mbp_get_intensity(struct backlight_device *bd) -{ - outb(0x03, 0xb3); - outb(0xbf, 0xb2); - return inb(0xb3) >> 4; -} - -static struct backlight_ops mbp_ops = { - .get_brightness = mbp_get_intensity, - .update_status = mbp_send_intensity, -}; - -static int __init mbp_init(void) -{ - if (!dmi_check_system(mbp_device_table)) - return -ENODEV; - - if (!request_region(0xb2, 2, "Macbook Pro backlight")) - return -ENXIO; - - mbp_backlight_device = backlight_device_register("mbp_backlight", - NULL, NULL, - &mbp_ops); - if (IS_ERR(mbp_backlight_device)) { - release_region(0xb2, 2); - return PTR_ERR(mbp_backlight_device); - } - - mbp_backlight_device->props.max_brightness = 15; - mbp_backlight_device->props.brightness = - mbp_get_intensity(mbp_backlight_device); - backlight_update_status(mbp_backlight_device); - - return 0; -} - -static void __exit mbp_exit(void) -{ - backlight_device_unregister(mbp_backlight_device); - - release_region(0xb2, 2); -} - -module_init(mbp_init); -module_exit(mbp_exit); - -MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); -MODULE_DESCRIPTION("Nvidia-based Macbook Pro Backlight Driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("svnAppleInc.:pnMacBookPro3,1"); -MODULE_ALIAS("svnAppleInc.:pnMacBookPro3,2"); -MODULE_ALIAS("svnAppleInc.:pnMacBookPro4,1"); diff --git a/drivers/video/backlight/omap1_bl.c b/drivers/video/backlight/omap1_bl.c index 891875d53a4..a0dcd88ac74 100644 --- a/drivers/video/backlight/omap1_bl.c +++ b/drivers/video/backlight/omap1_bl.c @@ -24,10 +24,11 @@ #include <linux/platform_device.h> #include <linux/fb.h> #include <linux/backlight.h> +#include <linux/slab.h> +#include <linux/platform_data/omap1_bl.h> -#include <asm/arch/hardware.h> -#include <asm/arch/board.h> -#include <asm/arch/mux.h> +#include <mach/hardware.h> +#include <mach/mux.h> #define OMAPBL_MAX_INTENSITY 0xff @@ -39,12 +40,12 @@ struct omap_backlight { struct omap_backlight_config *pdata; }; -static void inline omapbl_send_intensity(int intensity) +static inline void omapbl_send_intensity(int intensity) { omap_writeb(intensity, OMAP_PWL_ENABLE); } -static void inline omapbl_send_enable(int enable) +static inline void omapbl_send_enable(int enable) { omap_writeb(enable, OMAP_PWL_CLK_ENABLE); } @@ -70,32 +71,29 @@ static void omapbl_blank(struct omap_backlight *bl, int mode) } } -#ifdef CONFIG_PM -static int omapbl_suspend(struct platform_device *pdev, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int omapbl_suspend(struct device *dev) { - struct backlight_device *dev = platform_get_drvdata(pdev); - struct omap_backlight *bl = dev_get_drvdata(&dev->dev); + struct backlight_device *bl_dev = dev_get_drvdata(dev); + struct omap_backlight *bl = bl_get_data(bl_dev); omapbl_blank(bl, FB_BLANK_POWERDOWN); return 0; } -static int omapbl_resume(struct platform_device *pdev) +static int omapbl_resume(struct device *dev) { - struct backlight_device *dev = platform_get_drvdata(pdev); - struct omap_backlight *bl = dev_get_drvdata(&dev->dev); + struct backlight_device *bl_dev = dev_get_drvdata(dev); + struct omap_backlight *bl = bl_get_data(bl_dev); omapbl_blank(bl, bl->powermode); return 0; } -#else -#define omapbl_suspend NULL -#define omapbl_resume NULL #endif static int omapbl_set_power(struct backlight_device *dev, int state) { - struct omap_backlight *bl = dev_get_drvdata(&dev->dev); + struct omap_backlight *bl = bl_get_data(dev); omapbl_blank(bl, state); bl->powermode = state; @@ -105,7 +103,7 @@ static int omapbl_set_power(struct backlight_device *dev, int state) static int omapbl_update_status(struct backlight_device *dev) { - struct omap_backlight *bl = dev_get_drvdata(&dev->dev); + struct omap_backlight *bl = bl_get_data(dev); if (bl->current_intensity != dev->props.brightness) { if (bl->powermode == FB_BLANK_UNBLANK) @@ -121,35 +119,37 @@ static int omapbl_update_status(struct backlight_device *dev) static int omapbl_get_intensity(struct backlight_device *dev) { - struct omap_backlight *bl = dev_get_drvdata(&dev->dev); + struct omap_backlight *bl = bl_get_data(dev); return bl->current_intensity; } -static struct backlight_ops omapbl_ops = { +static const struct backlight_ops omapbl_ops = { .get_brightness = omapbl_get_intensity, .update_status = omapbl_update_status, }; static int omapbl_probe(struct platform_device *pdev) { + struct backlight_properties props; struct backlight_device *dev; struct omap_backlight *bl; - struct omap_backlight_config *pdata = pdev->dev.platform_data; + struct omap_backlight_config *pdata = dev_get_platdata(&pdev->dev); if (!pdata) return -ENXIO; - omapbl_ops.check_fb = pdata->check_fb; - - bl = kzalloc(sizeof(struct omap_backlight), GFP_KERNEL); + bl = devm_kzalloc(&pdev->dev, sizeof(struct omap_backlight), + GFP_KERNEL); if (unlikely(!bl)) return -ENOMEM; - dev = backlight_device_register("omap-bl", &pdev->dev, bl, &omapbl_ops); - if (IS_ERR(dev)) { - kfree(bl); + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = OMAPBL_MAX_INTENSITY; + dev = devm_backlight_device_register(&pdev->dev, "omap-bl", &pdev->dev, + bl, &omapbl_ops, &props); + if (IS_ERR(dev)) return PTR_ERR(dev); - } bl->powermode = FB_BLANK_POWERDOWN; bl->current_intensity = 0; @@ -162,48 +162,25 @@ static int omapbl_probe(struct platform_device *pdev) omap_cfg_reg(PWL); /* Conflicts with UART3 */ dev->props.fb_blank = FB_BLANK_UNBLANK; - dev->props.max_brightness = OMAPBL_MAX_INTENSITY; dev->props.brightness = pdata->default_intensity; omapbl_update_status(dev); - printk(KERN_INFO "OMAP LCD backlight initialised\n"); + dev_info(&pdev->dev, "OMAP LCD backlight initialised\n"); return 0; } -static int omapbl_remove(struct platform_device *pdev) -{ - struct backlight_device *dev = platform_get_drvdata(pdev); - struct omap_backlight *bl = dev_get_drvdata(&dev->dev); - - backlight_device_unregister(dev); - kfree(bl); - - return 0; -} +static SIMPLE_DEV_PM_OPS(omapbl_pm_ops, omapbl_suspend, omapbl_resume); static struct platform_driver omapbl_driver = { .probe = omapbl_probe, - .remove = omapbl_remove, - .suspend = omapbl_suspend, - .resume = omapbl_resume, .driver = { .name = "omap-bl", + .pm = &omapbl_pm_ops, }, }; -static int __init omapbl_init(void) -{ - return platform_driver_register(&omapbl_driver); -} - -static void __exit omapbl_exit(void) -{ - platform_driver_unregister(&omapbl_driver); -} - -module_init(omapbl_init); -module_exit(omapbl_exit); +module_platform_driver(omapbl_driver); MODULE_AUTHOR("Andrzej Zaborowski <balrog@zabor.org>"); MODULE_DESCRIPTION("OMAP LCD Backlight driver"); diff --git a/drivers/video/backlight/ot200_bl.c b/drivers/video/backlight/ot200_bl.c new file mode 100644 index 00000000000..f5a5202dd79 --- /dev/null +++ b/drivers/video/backlight/ot200_bl.c @@ -0,0 +1,166 @@ +/* + * Copyright (C) 2012 Bachmann electronic GmbH + * Christian Gmeiner <christian.gmeiner@gmail.com> + * + * Backlight driver for ot200 visualisation device from + * Bachmann electronic GmbH. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/gpio.h> +#include <linux/platform_device.h> +#include <linux/cs5535.h> + +static struct cs5535_mfgpt_timer *pwm_timer; + +/* this array defines the mapping of brightness in % to pwm frequency */ +static const u8 dim_table[101] = {0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, + 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, + 10, 10, 11, 11, 12, 12, 13, 14, 15, 15, 16, + 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, + 30, 31, 33, 35, 37, 39, 41, 43, 45, 47, 50, + 53, 55, 58, 61, 65, 68, 72, 75, 79, 84, 88, + 93, 97, 103, 108, 114, 120, 126, 133, 140, + 147, 155, 163}; + +struct ot200_backlight_data { + int current_brightness; +}; + +#define GPIO_DIMM 27 +#define SCALE 1 +#define CMP1MODE 0x2 /* compare on GE; output high on compare + * greater than or equal */ +#define PWM_SETUP (SCALE | CMP1MODE << 6 | MFGPT_SETUP_CNTEN) +#define MAX_COMP2 163 + +static int ot200_backlight_update_status(struct backlight_device *bl) +{ + struct ot200_backlight_data *data = bl_get_data(bl); + int brightness = bl->props.brightness; + + if (bl->props.state & BL_CORE_FBBLANK) + brightness = 0; + + /* enable or disable PWM timer */ + if (brightness == 0) + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, 0); + else if (data->current_brightness == 0) { + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, + MFGPT_SETUP_CNTEN); + } + + /* apply new brightness value */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, + MAX_COMP2 - dim_table[brightness]); + data->current_brightness = brightness; + + return 0; +} + +static int ot200_backlight_get_brightness(struct backlight_device *bl) +{ + struct ot200_backlight_data *data = bl_get_data(bl); + return data->current_brightness; +} + +static const struct backlight_ops ot200_backlight_ops = { + .update_status = ot200_backlight_update_status, + .get_brightness = ot200_backlight_get_brightness, +}; + +static int ot200_backlight_probe(struct platform_device *pdev) +{ + struct backlight_device *bl; + struct ot200_backlight_data *data; + struct backlight_properties props; + int retval = 0; + + /* request gpio */ + if (devm_gpio_request(&pdev->dev, GPIO_DIMM, + "ot200 backlight dimmer") < 0) { + dev_err(&pdev->dev, "failed to request GPIO %d\n", GPIO_DIMM); + return -ENODEV; + } + + /* request timer */ + pwm_timer = cs5535_mfgpt_alloc_timer(7, MFGPT_DOMAIN_ANY); + if (!pwm_timer) { + dev_err(&pdev->dev, "MFGPT 7 not available\n"); + return -ENODEV; + } + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) { + retval = -ENOMEM; + goto error_devm_kzalloc; + } + + /* setup gpio */ + cs5535_gpio_set(GPIO_DIMM, GPIO_OUTPUT_ENABLE); + cs5535_gpio_set(GPIO_DIMM, GPIO_OUTPUT_AUX1); + + /* setup timer */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP2, MAX_COMP2); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, PWM_SETUP); + + data->current_brightness = 100; + props.max_brightness = 100; + props.brightness = 100; + props.type = BACKLIGHT_RAW; + + bl = devm_backlight_device_register(&pdev->dev, dev_name(&pdev->dev), + &pdev->dev, data, &ot200_backlight_ops, + &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + retval = PTR_ERR(bl); + goto error_devm_kzalloc; + } + + platform_set_drvdata(pdev, bl); + + return 0; + +error_devm_kzalloc: + cs5535_mfgpt_free_timer(pwm_timer); + return retval; +} + +static int ot200_backlight_remove(struct platform_device *pdev) +{ + /* on module unload set brightness to 100% */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, + MAX_COMP2 - dim_table[100]); + + cs5535_mfgpt_free_timer(pwm_timer); + + return 0; +} + +static struct platform_driver ot200_backlight_driver = { + .driver = { + .name = "ot200-backlight", + .owner = THIS_MODULE, + }, + .probe = ot200_backlight_probe, + .remove = ot200_backlight_remove, +}; + +module_platform_driver(ot200_backlight_driver); + +MODULE_DESCRIPTION("backlight driver for ot200 visualisation device"); +MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@gmail.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ot200-backlight"); diff --git a/drivers/video/backlight/pandora_bl.c b/drivers/video/backlight/pandora_bl.c new file mode 100644 index 00000000000..2098c5d6efb --- /dev/null +++ b/drivers/video/backlight/pandora_bl.c @@ -0,0 +1,161 @@ +/* + * Backlight driver for Pandora handheld. + * Pandora uses TWL4030 PWM0 -> TPS61161 combo for control backlight. + * Based on pwm_bl.c + * + * Copyright 2009,2012 Gražvydas Ignotas <notasas@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/i2c/twl.h> +#include <linux/err.h> + +#define TWL_PWM0_ON 0x00 +#define TWL_PWM0_OFF 0x01 + +#define TWL_INTBR_GPBR1 0x0c +#define TWL_INTBR_PMBR1 0x0d + +#define TWL_PMBR1_PWM0_MUXMASK 0x0c +#define TWL_PMBR1_PWM0 0x04 +#define PWM0_CLK_ENABLE BIT(0) +#define PWM0_ENABLE BIT(2) + +/* range accepted by hardware */ +#define MIN_VALUE 9 +#define MAX_VALUE 63 +#define MAX_USER_VALUE (MAX_VALUE - MIN_VALUE) + +#define PANDORABL_WAS_OFF BL_CORE_DRIVER1 + +static int pandora_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + u8 r; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + if (bl->props.state & BL_CORE_FBBLANK) + brightness = 0; + if (bl->props.state & BL_CORE_SUSPENDED) + brightness = 0; + + if ((unsigned int)brightness > MAX_USER_VALUE) + brightness = MAX_USER_VALUE; + + if (brightness == 0) { + if (bl->props.state & PANDORABL_WAS_OFF) + goto done; + + /* first disable PWM0 output, then clock */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_GPBR1); + r &= ~PWM0_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + r &= ~PWM0_CLK_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + + goto done; + } + + if (bl->props.state & PANDORABL_WAS_OFF) { + /* + * set PWM duty cycle to max. TPS61161 seems to use this + * to calibrate it's PWM sensitivity when it starts. + */ + twl_i2c_write_u8(TWL_MODULE_PWM, MAX_VALUE, TWL_PWM0_OFF); + + /* first enable clock, then PWM0 out */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_GPBR1); + r &= ~PWM0_ENABLE; + r |= PWM0_CLK_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + r |= PWM0_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + + /* + * TI made it very easy to enable digital control, so easy that + * it often triggers unintentionally and disabes PWM control, + * so wait until 1 wire mode detection window ends. + */ + usleep_range(2000, 10000); + } + + twl_i2c_write_u8(TWL_MODULE_PWM, MIN_VALUE + brightness, TWL_PWM0_OFF); + +done: + if (brightness != 0) + bl->props.state &= ~PANDORABL_WAS_OFF; + else + bl->props.state |= PANDORABL_WAS_OFF; + + return 0; +} + +static int pandora_backlight_get_brightness(struct backlight_device *bl) +{ + return bl->props.brightness; +} + +static const struct backlight_ops pandora_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = pandora_backlight_update_status, + .get_brightness = pandora_backlight_get_brightness, +}; + +static int pandora_backlight_probe(struct platform_device *pdev) +{ + struct backlight_properties props; + struct backlight_device *bl; + u8 r; + + memset(&props, 0, sizeof(props)); + props.max_brightness = MAX_USER_VALUE; + props.type = BACKLIGHT_RAW; + bl = devm_backlight_device_register(&pdev->dev, pdev->name, &pdev->dev, + NULL, &pandora_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + platform_set_drvdata(pdev, bl); + + /* 64 cycle period, ON position 0 */ + twl_i2c_write_u8(TWL_MODULE_PWM, 0x80, TWL_PWM0_ON); + + bl->props.state |= PANDORABL_WAS_OFF; + bl->props.brightness = MAX_USER_VALUE; + backlight_update_status(bl); + + /* enable PWM function in pin mux */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_PMBR1); + r &= ~TWL_PMBR1_PWM0_MUXMASK; + r |= TWL_PMBR1_PWM0; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_PMBR1); + + return 0; +} + +static struct platform_driver pandora_backlight_driver = { + .driver = { + .name = "pandora-backlight", + .owner = THIS_MODULE, + }, + .probe = pandora_backlight_probe, +}; + +module_platform_driver(pandora_backlight_driver); + +MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>"); +MODULE_DESCRIPTION("Pandora Backlight Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pandora-backlight"); diff --git a/drivers/video/backlight/pcf50633-backlight.c b/drivers/video/backlight/pcf50633-backlight.c new file mode 100644 index 00000000000..b95d3b0aaff --- /dev/null +++ b/drivers/video/backlight/pcf50633-backlight.c @@ -0,0 +1,163 @@ +/* + * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> + * PCF50633 backlight device driver + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/platform_device.h> + +#include <linux/backlight.h> +#include <linux/fb.h> + +#include <linux/mfd/pcf50633/core.h> +#include <linux/mfd/pcf50633/backlight.h> + +struct pcf50633_bl { + struct pcf50633 *pcf; + struct backlight_device *bl; + + unsigned int brightness; + unsigned int brightness_limit; +}; + +/* + * pcf50633_bl_set_brightness_limit + * + * Update the brightness limit for the pc50633 backlight. The actual brightness + * will not go above the limit. This is useful to limit power drain for example + * on low battery. + * + * @dev: Pointer to a pcf50633 device + * @limit: The brightness limit. Valid values are 0-63 + */ +int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit) +{ + struct pcf50633_bl *pcf_bl = platform_get_drvdata(pcf->bl_pdev); + + if (!pcf_bl) + return -ENODEV; + + pcf_bl->brightness_limit = limit & 0x3f; + backlight_update_status(pcf_bl->bl); + + return 0; +} + +static int pcf50633_bl_update_status(struct backlight_device *bl) +{ + struct pcf50633_bl *pcf_bl = bl_get_data(bl); + unsigned int new_brightness; + + + if (bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK) || + bl->props.power != FB_BLANK_UNBLANK) + new_brightness = 0; + else if (bl->props.brightness < pcf_bl->brightness_limit) + new_brightness = bl->props.brightness; + else + new_brightness = pcf_bl->brightness_limit; + + + if (pcf_bl->brightness == new_brightness) + return 0; + + if (new_brightness) { + pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDOUT, + new_brightness); + if (!pcf_bl->brightness) + pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 1); + } else { + pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 0); + } + + pcf_bl->brightness = new_brightness; + + return 0; +} + +static int pcf50633_bl_get_brightness(struct backlight_device *bl) +{ + struct pcf50633_bl *pcf_bl = bl_get_data(bl); + return pcf_bl->brightness; +} + +static const struct backlight_ops pcf50633_bl_ops = { + .get_brightness = pcf50633_bl_get_brightness, + .update_status = pcf50633_bl_update_status, + .options = BL_CORE_SUSPENDRESUME, +}; + +static int pcf50633_bl_probe(struct platform_device *pdev) +{ + struct pcf50633_bl *pcf_bl; + struct device *parent = pdev->dev.parent; + struct pcf50633_platform_data *pcf50633_data = dev_get_platdata(parent); + struct pcf50633_bl_platform_data *pdata = pcf50633_data->backlight_data; + struct backlight_properties bl_props; + + pcf_bl = devm_kzalloc(&pdev->dev, sizeof(*pcf_bl), GFP_KERNEL); + if (!pcf_bl) + return -ENOMEM; + + memset(&bl_props, 0, sizeof(bl_props)); + bl_props.type = BACKLIGHT_RAW; + bl_props.max_brightness = 0x3f; + bl_props.power = FB_BLANK_UNBLANK; + + if (pdata) { + bl_props.brightness = pdata->default_brightness; + pcf_bl->brightness_limit = pdata->default_brightness_limit; + } else { + bl_props.brightness = 0x3f; + pcf_bl->brightness_limit = 0x3f; + } + + pcf_bl->pcf = dev_to_pcf50633(pdev->dev.parent); + + pcf_bl->bl = devm_backlight_device_register(&pdev->dev, pdev->name, + &pdev->dev, pcf_bl, + &pcf50633_bl_ops, &bl_props); + + if (IS_ERR(pcf_bl->bl)) + return PTR_ERR(pcf_bl->bl); + + platform_set_drvdata(pdev, pcf_bl); + + pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time); + + /* + * Should be different from bl_props.brightness, so we do not exit + * update_status early the first time it's called + */ + pcf_bl->brightness = pcf_bl->bl->props.brightness + 1; + + backlight_update_status(pcf_bl->bl); + + return 0; +} + +static struct platform_driver pcf50633_bl_driver = { + .probe = pcf50633_bl_probe, + .driver = { + .name = "pcf50633-backlight", + }, +}; + +module_platform_driver(pcf50633_bl_driver); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("PCF50633 backlight driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pcf50633-backlight"); diff --git a/drivers/video/backlight/platform_lcd.c b/drivers/video/backlight/platform_lcd.c index 738694d2388..c3d2e209fc8 100644 --- a/drivers/video/backlight/platform_lcd.c +++ b/drivers/video/backlight/platform_lcd.c @@ -16,6 +16,8 @@ #include <linux/fb.h> #include <linux/backlight.h> #include <linux/lcd.h> +#include <linux/of.h> +#include <linux/slab.h> #include <video/platform_lcd.h> @@ -25,7 +27,7 @@ struct platform_lcd { struct plat_lcd_data *pdata; unsigned int power; - unsigned int suspended : 1; + unsigned int suspended:1; }; static inline struct platform_lcd *to_our_lcd(struct lcd_device *lcd) @@ -71,59 +73,49 @@ static struct lcd_ops platform_lcd_ops = { .check_fb = platform_lcd_match, }; -static int __devinit platform_lcd_probe(struct platform_device *pdev) +static int platform_lcd_probe(struct platform_device *pdev) { struct plat_lcd_data *pdata; struct platform_lcd *plcd; struct device *dev = &pdev->dev; int err; - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); if (!pdata) { dev_err(dev, "no platform data supplied\n"); return -EINVAL; } - plcd = kzalloc(sizeof(struct platform_lcd), GFP_KERNEL); - if (!plcd) { - dev_err(dev, "no memory for state\n"); - return -ENOMEM; + if (pdata->probe) { + err = pdata->probe(pdata); + if (err) + return err; } + plcd = devm_kzalloc(&pdev->dev, sizeof(struct platform_lcd), + GFP_KERNEL); + if (!plcd) + return -ENOMEM; + plcd->us = dev; plcd->pdata = pdata; - plcd->lcd = lcd_device_register(dev_name(dev), dev, - plcd, &platform_lcd_ops); + plcd->lcd = devm_lcd_device_register(&pdev->dev, dev_name(dev), dev, + plcd, &platform_lcd_ops); if (IS_ERR(plcd->lcd)) { dev_err(dev, "cannot register lcd device\n"); - err = PTR_ERR(plcd->lcd); - goto err_mem; + return PTR_ERR(plcd->lcd); } platform_set_drvdata(pdev, plcd); platform_lcd_set_power(plcd->lcd, FB_BLANK_NORMAL); return 0; - - err_mem: - kfree(plcd); - return err; -} - -static int __devexit platform_lcd_remove(struct platform_device *pdev) -{ - struct platform_lcd *plcd = platform_get_drvdata(pdev); - - lcd_device_unregister(plcd->lcd); - kfree(plcd); - - return 0; } -#ifdef CONFIG_PM -static int platform_lcd_suspend(struct platform_device *pdev, pm_message_t st) +#ifdef CONFIG_PM_SLEEP +static int platform_lcd_suspend(struct device *dev) { - struct platform_lcd *plcd = platform_get_drvdata(pdev); + struct platform_lcd *plcd = dev_get_drvdata(dev); plcd->suspended = 1; platform_lcd_set_power(plcd->lcd, plcd->power); @@ -131,43 +123,39 @@ static int platform_lcd_suspend(struct platform_device *pdev, pm_message_t st) return 0; } -static int platform_lcd_resume(struct platform_device *pdev) +static int platform_lcd_resume(struct device *dev) { - struct platform_lcd *plcd = platform_get_drvdata(pdev); + struct platform_lcd *plcd = dev_get_drvdata(dev); plcd->suspended = 0; platform_lcd_set_power(plcd->lcd, plcd->power); return 0; } -#else -#define platform_lcd_suspend NULL -#define platform_lcd_resume NULL +#endif + +static SIMPLE_DEV_PM_OPS(platform_lcd_pm_ops, platform_lcd_suspend, + platform_lcd_resume); + +#ifdef CONFIG_OF +static const struct of_device_id platform_lcd_of_match[] = { + { .compatible = "platform-lcd" }, + {}, +}; +MODULE_DEVICE_TABLE(of, platform_lcd_of_match); #endif static struct platform_driver platform_lcd_driver = { .driver = { .name = "platform-lcd", .owner = THIS_MODULE, + .pm = &platform_lcd_pm_ops, + .of_match_table = of_match_ptr(platform_lcd_of_match), }, .probe = platform_lcd_probe, - .remove = __devexit_p(platform_lcd_remove), - .suspend = platform_lcd_suspend, - .resume = platform_lcd_resume, }; -static int __init platform_lcd_init(void) -{ - return platform_driver_register(&platform_lcd_driver); -} - -static void __exit platform_lcd_cleanup(void) -{ - platform_driver_unregister(&platform_lcd_driver); -} - -module_init(platform_lcd_init); -module_exit(platform_lcd_cleanup); +module_platform_driver(platform_lcd_driver); MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/progear_bl.c b/drivers/video/backlight/progear_bl.c deleted file mode 100644 index 15fb4d58b5b..00000000000 --- a/drivers/video/backlight/progear_bl.c +++ /dev/null @@ -1,152 +0,0 @@ -/* - * Backlight Driver for Frontpath ProGear HX1050+ - * - * Copyright (c) 2006 Marcin Juszkiewicz - * - * Based on Progear LCD driver by M Schacht - * <mschacht at alumni dot washington dot edu> - * - * Based on Sharp's Corgi Backlight Driver - * Based on Backlight Driver for HP Jornada 680 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/mutex.h> -#include <linux/fb.h> -#include <linux/backlight.h> -#include <linux/pci.h> - -#define PMU_LPCR 0xB0 -#define SB_MPS1 0x61 -#define HW_LEVEL_MAX 0x77 -#define HW_LEVEL_MIN 0x4f - -static struct pci_dev *pmu_dev = NULL; -static struct pci_dev *sb_dev = NULL; - -static int progearbl_set_intensity(struct backlight_device *bd) -{ - int intensity = bd->props.brightness; - - if (bd->props.power != FB_BLANK_UNBLANK) - intensity = 0; - if (bd->props.fb_blank != FB_BLANK_UNBLANK) - intensity = 0; - - pci_write_config_byte(pmu_dev, PMU_LPCR, intensity + HW_LEVEL_MIN); - - return 0; -} - -static int progearbl_get_intensity(struct backlight_device *bd) -{ - u8 intensity; - pci_read_config_byte(pmu_dev, PMU_LPCR, &intensity); - - return intensity - HW_LEVEL_MIN; -} - -static struct backlight_ops progearbl_ops = { - .get_brightness = progearbl_get_intensity, - .update_status = progearbl_set_intensity, -}; - -static int progearbl_probe(struct platform_device *pdev) -{ - u8 temp; - struct backlight_device *progear_backlight_device; - - pmu_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, NULL); - if (!pmu_dev) { - printk("ALI M7101 PMU not found.\n"); - return -ENODEV; - } - - sb_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL); - if (!sb_dev) { - printk("ALI 1533 SB not found.\n"); - pci_dev_put(pmu_dev); - return -ENODEV; - } - - /* Set SB_MPS1 to enable brightness control. */ - pci_read_config_byte(sb_dev, SB_MPS1, &temp); - pci_write_config_byte(sb_dev, SB_MPS1, temp | 0x20); - - progear_backlight_device = backlight_device_register("progear-bl", - &pdev->dev, NULL, - &progearbl_ops); - if (IS_ERR(progear_backlight_device)) - return PTR_ERR(progear_backlight_device); - - platform_set_drvdata(pdev, progear_backlight_device); - - progear_backlight_device->props.power = FB_BLANK_UNBLANK; - progear_backlight_device->props.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN; - progear_backlight_device->props.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN; - progearbl_set_intensity(progear_backlight_device); - - return 0; -} - -static int progearbl_remove(struct platform_device *pdev) -{ - struct backlight_device *bd = platform_get_drvdata(pdev); - backlight_device_unregister(bd); - - return 0; -} - -static struct platform_driver progearbl_driver = { - .probe = progearbl_probe, - .remove = progearbl_remove, - .driver = { - .name = "progear-bl", - }, -}; - -static struct platform_device *progearbl_device; - -static int __init progearbl_init(void) -{ - int ret = platform_driver_register(&progearbl_driver); - - if (!ret) { - progearbl_device = platform_device_alloc("progear-bl", -1); - if (!progearbl_device) - return -ENOMEM; - - ret = platform_device_add(progearbl_device); - - if (ret) { - platform_device_put(progearbl_device); - platform_driver_unregister(&progearbl_driver); - } - } - - return ret; -} - -static void __exit progearbl_exit(void) -{ - pci_dev_put(pmu_dev); - pci_dev_put(sb_dev); - - platform_device_unregister(progearbl_device); - platform_driver_unregister(&progearbl_driver); -} - -module_init(progearbl_init); -module_exit(progearbl_exit); - -MODULE_AUTHOR("Marcin Juszkiewicz <linux@hrw.one.pl>"); -MODULE_DESCRIPTION("ProGear Backlight Driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 6338d0e2fe0..38ca88bc5c3 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -3,13 +3,15 @@ * * simple PWM based backlight control, board code has to setup * 1) pin configuration so PWM waveforms can output - * 2) platform_data casts to the PWM id (0/1/2/3 on PXA) + * 2) platform_data being correctly configured * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ +#include <linux/gpio/consumer.h> +#include <linux/gpio.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> @@ -19,35 +21,97 @@ #include <linux/err.h> #include <linux/pwm.h> #include <linux/pwm_backlight.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> struct pwm_bl_data { struct pwm_device *pwm; + struct device *dev; unsigned int period; - int (*notify)(int brightness); + unsigned int lth_brightness; + unsigned int *levels; + bool enabled; + struct regulator *power_supply; + struct gpio_desc *enable_gpio; + unsigned int scale; + int (*notify)(struct device *, + int brightness); + void (*notify_after)(struct device *, + int brightness); + int (*check_fb)(struct device *, struct fb_info *); + void (*exit)(struct device *); }; +static void pwm_backlight_power_on(struct pwm_bl_data *pb, int brightness) +{ + int err; + + if (pb->enabled) + return; + + err = regulator_enable(pb->power_supply); + if (err < 0) + dev_err(pb->dev, "failed to enable power supply\n"); + + if (pb->enable_gpio) + gpiod_set_value(pb->enable_gpio, 1); + + pwm_enable(pb->pwm); + pb->enabled = true; +} + +static void pwm_backlight_power_off(struct pwm_bl_data *pb) +{ + if (!pb->enabled) + return; + + pwm_config(pb->pwm, 0, pb->period); + pwm_disable(pb->pwm); + + if (pb->enable_gpio) + gpiod_set_value(pb->enable_gpio, 0); + + regulator_disable(pb->power_supply); + pb->enabled = false; +} + +static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness) +{ + unsigned int lth = pb->lth_brightness; + int duty_cycle; + + if (pb->levels) + duty_cycle = pb->levels[brightness]; + else + duty_cycle = brightness; + + return (duty_cycle * (pb->period - lth) / pb->scale) + lth; +} + static int pwm_backlight_update_status(struct backlight_device *bl) { - struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev); + struct pwm_bl_data *pb = bl_get_data(bl); int brightness = bl->props.brightness; - int max = bl->props.max_brightness; - - if (bl->props.power != FB_BLANK_UNBLANK) - brightness = 0; + int duty_cycle; - if (bl->props.fb_blank != FB_BLANK_UNBLANK) + if (bl->props.power != FB_BLANK_UNBLANK || + bl->props.fb_blank != FB_BLANK_UNBLANK || + bl->props.state & BL_CORE_FBBLANK) brightness = 0; if (pb->notify) - brightness = pb->notify(brightness); - - if (brightness == 0) { - pwm_config(pb->pwm, 0, pb->period); - pwm_disable(pb->pwm); - } else { - pwm_config(pb->pwm, brightness * pb->period / max, pb->period); - pwm_enable(pb->pwm); - } + brightness = pb->notify(pb->dev, brightness); + + if (brightness > 0) { + duty_cycle = compute_duty_cycle(pb, brightness); + pwm_config(pb->pwm, duty_cycle, pb->period); + pwm_backlight_power_on(pb, brightness); + } else + pwm_backlight_power_off(pb); + + if (pb->notify_after) + pb->notify_after(pb->dev, brightness); + return 0; } @@ -56,20 +120,100 @@ static int pwm_backlight_get_brightness(struct backlight_device *bl) return bl->props.brightness; } -static struct backlight_ops pwm_backlight_ops = { +static int pwm_backlight_check_fb(struct backlight_device *bl, + struct fb_info *info) +{ + struct pwm_bl_data *pb = bl_get_data(bl); + + return !pb->check_fb || pb->check_fb(pb->dev, info); +} + +static const struct backlight_ops pwm_backlight_ops = { .update_status = pwm_backlight_update_status, .get_brightness = pwm_backlight_get_brightness, + .check_fb = pwm_backlight_check_fb, }; +#ifdef CONFIG_OF +static int pwm_backlight_parse_dt(struct device *dev, + struct platform_pwm_backlight_data *data) +{ + struct device_node *node = dev->of_node; + struct property *prop; + int length; + u32 value; + int ret; + + if (!node) + return -ENODEV; + + memset(data, 0, sizeof(*data)); + + /* determine the number of brightness levels */ + prop = of_find_property(node, "brightness-levels", &length); + if (!prop) + return -EINVAL; + + data->max_brightness = length / sizeof(u32); + + /* read brightness levels from DT property */ + if (data->max_brightness > 0) { + size_t size = sizeof(*data->levels) * data->max_brightness; + + data->levels = devm_kzalloc(dev, size, GFP_KERNEL); + if (!data->levels) + return -ENOMEM; + + ret = of_property_read_u32_array(node, "brightness-levels", + data->levels, + data->max_brightness); + if (ret < 0) + return ret; + + ret = of_property_read_u32(node, "default-brightness-level", + &value); + if (ret < 0) + return ret; + + data->dft_brightness = value; + data->max_brightness--; + } + + return 0; +} + +static struct of_device_id pwm_backlight_of_match[] = { + { .compatible = "pwm-backlight" }, + { } +}; + +MODULE_DEVICE_TABLE(of, pwm_backlight_of_match); +#else +static int pwm_backlight_parse_dt(struct device *dev, + struct platform_pwm_backlight_data *data) +{ + return -ENODEV; +} +#endif + static int pwm_backlight_probe(struct platform_device *pdev) { - struct platform_pwm_backlight_data *data = pdev->dev.platform_data; + struct platform_pwm_backlight_data *data = dev_get_platdata(&pdev->dev); + struct platform_pwm_backlight_data defdata; + struct backlight_properties props; struct backlight_device *bl; struct pwm_bl_data *pb; int ret; - if (!data) - return -EINVAL; + if (!data) { + ret = pwm_backlight_parse_dt(&pdev->dev, &defdata); + if (ret < 0) { + dev_err(&pdev->dev, "failed to find platform data\n"); + return ret; + } + + data = &defdata; + } if (data->init) { ret = data->init(&pdev->dev); @@ -77,41 +221,116 @@ static int pwm_backlight_probe(struct platform_device *pdev) return ret; } - pb = kzalloc(sizeof(*pb), GFP_KERNEL); + pb = devm_kzalloc(&pdev->dev, sizeof(*pb), GFP_KERNEL); if (!pb) { ret = -ENOMEM; goto err_alloc; } - pb->period = data->pwm_period_ns; + if (data->levels) { + unsigned int i; + + for (i = 0; i <= data->max_brightness; i++) + if (data->levels[i] > pb->scale) + pb->scale = data->levels[i]; + + pb->levels = data->levels; + } else + pb->scale = data->max_brightness; + pb->notify = data->notify; + pb->notify_after = data->notify_after; + pb->check_fb = data->check_fb; + pb->exit = data->exit; + pb->dev = &pdev->dev; + pb->enabled = false; - pb->pwm = pwm_request(data->pwm_id, "backlight"); + pb->enable_gpio = devm_gpiod_get(&pdev->dev, "enable"); + if (IS_ERR(pb->enable_gpio)) { + ret = PTR_ERR(pb->enable_gpio); + if (ret == -ENOENT) + pb->enable_gpio = NULL; + else + goto err_alloc; + } + + /* + * Compatibility fallback for drivers still using the integer GPIO + * platform data. Must go away soon. + */ + if (!pb->enable_gpio && gpio_is_valid(data->enable_gpio)) { + ret = devm_gpio_request_one(&pdev->dev, data->enable_gpio, + GPIOF_OUT_INIT_HIGH, "enable"); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request GPIO#%d: %d\n", + data->enable_gpio, ret); + goto err_alloc; + } + + pb->enable_gpio = gpio_to_desc(data->enable_gpio); + } + + if (pb->enable_gpio) + gpiod_direction_output(pb->enable_gpio, 1); + + pb->power_supply = devm_regulator_get(&pdev->dev, "power"); + if (IS_ERR(pb->power_supply)) { + ret = PTR_ERR(pb->power_supply); + goto err_alloc; + } + + pb->pwm = devm_pwm_get(&pdev->dev, NULL); if (IS_ERR(pb->pwm)) { - dev_err(&pdev->dev, "unable to request PWM for backlight\n"); - ret = PTR_ERR(pb->pwm); - goto err_pwm; + dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n"); + + pb->pwm = pwm_request(data->pwm_id, "pwm-backlight"); + if (IS_ERR(pb->pwm)) { + dev_err(&pdev->dev, "unable to request legacy PWM\n"); + ret = PTR_ERR(pb->pwm); + goto err_alloc; + } } - bl = backlight_device_register(pdev->name, &pdev->dev, - pb, &pwm_backlight_ops); + dev_dbg(&pdev->dev, "got pwm for backlight\n"); + + /* + * The DT case will set the pwm_period_ns field to 0 and store the + * period, parsed from the DT, in the PWM device. For the non-DT case, + * set the period from platform data if it has not already been set + * via the PWM lookup table. + */ + pb->period = pwm_get_period(pb->pwm); + if (!pb->period && (data->pwm_period_ns > 0)) { + pb->period = data->pwm_period_ns; + pwm_set_period(pb->pwm, data->pwm_period_ns); + } + + pb->lth_brightness = data->lth_brightness * (pb->period / pb->scale); + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = data->max_brightness; + bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, pb, + &pwm_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); ret = PTR_ERR(bl); - goto err_bl; + goto err_alloc; + } + + if (data->dft_brightness > data->max_brightness) { + dev_warn(&pdev->dev, + "invalid default brightness level: %u, using %u\n", + data->dft_brightness, data->max_brightness); + data->dft_brightness = data->max_brightness; } - bl->props.max_brightness = data->max_brightness; bl->props.brightness = data->dft_brightness; backlight_update_status(bl); platform_set_drvdata(pdev, bl); return 0; -err_bl: - pwm_free(pb->pwm); -err_pwm: - kfree(pb); err_alloc: if (data->exit) data->exit(&pdev->dev); @@ -120,66 +339,76 @@ err_alloc: static int pwm_backlight_remove(struct platform_device *pdev) { - struct platform_pwm_backlight_data *data = pdev->dev.platform_data; struct backlight_device *bl = platform_get_drvdata(pdev); - struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev); + struct pwm_bl_data *pb = bl_get_data(bl); backlight_device_unregister(bl); - pwm_config(pb->pwm, 0, pb->period); - pwm_disable(pb->pwm); - pwm_free(pb->pwm); - kfree(pb); - if (data->exit) - data->exit(&pdev->dev); + pwm_backlight_power_off(pb); + + if (pb->exit) + pb->exit(&pdev->dev); + return 0; } -#ifdef CONFIG_PM -static int pwm_backlight_suspend(struct platform_device *pdev, - pm_message_t state) +static void pwm_backlight_shutdown(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev); + struct pwm_bl_data *pb = bl_get_data(bl); + + pwm_backlight_power_off(pb); +} + +#ifdef CONFIG_PM_SLEEP +static int pwm_backlight_suspend(struct device *dev) +{ + struct backlight_device *bl = dev_get_drvdata(dev); + struct pwm_bl_data *pb = bl_get_data(bl); + + if (pb->notify) + pb->notify(pb->dev, 0); + + pwm_backlight_power_off(pb); + + if (pb->notify_after) + pb->notify_after(pb->dev, 0); - pwm_config(pb->pwm, 0, pb->period); - pwm_disable(pb->pwm); return 0; } -static int pwm_backlight_resume(struct platform_device *pdev) +static int pwm_backlight_resume(struct device *dev) { - struct backlight_device *bl = platform_get_drvdata(pdev); + struct backlight_device *bl = dev_get_drvdata(dev); backlight_update_status(bl); + return 0; } -#else -#define pwm_backlight_suspend NULL -#define pwm_backlight_resume NULL #endif +static const struct dev_pm_ops pwm_backlight_pm_ops = { +#ifdef CONFIG_PM_SLEEP + .suspend = pwm_backlight_suspend, + .resume = pwm_backlight_resume, + .poweroff = pwm_backlight_suspend, + .restore = pwm_backlight_resume, +#endif +}; + static struct platform_driver pwm_backlight_driver = { .driver = { - .name = "pwm-backlight", - .owner = THIS_MODULE, + .name = "pwm-backlight", + .owner = THIS_MODULE, + .pm = &pwm_backlight_pm_ops, + .of_match_table = of_match_ptr(pwm_backlight_of_match), }, .probe = pwm_backlight_probe, .remove = pwm_backlight_remove, - .suspend = pwm_backlight_suspend, - .resume = pwm_backlight_resume, + .shutdown = pwm_backlight_shutdown, }; -static int __init pwm_backlight_init(void) -{ - return platform_driver_register(&pwm_backlight_driver); -} -module_init(pwm_backlight_init); - -static void __exit pwm_backlight_exit(void) -{ - platform_driver_unregister(&pwm_backlight_driver); -} -module_exit(pwm_backlight_exit); +module_platform_driver(pwm_backlight_driver); MODULE_DESCRIPTION("PWM based Backlight Driver"); MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pwm-backlight"); diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c new file mode 100644 index 00000000000..2d6d48196c6 --- /dev/null +++ b/drivers/video/backlight/s6e63m0.c @@ -0,0 +1,864 @@ +/* + * S6E63M0 AMOLED LCD panel driver. + * + * Author: InKi Dae <inki.dae@samsung.com> + * + * Derived from drivers/video/omap/lcd-apollon.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/lcd.h> +#include <linux/module.h> +#include <linux/spi/spi.h> +#include <linux/wait.h> + +#include "s6e63m0_gamma.h" + +#define SLEEPMSEC 0x1000 +#define ENDDEF 0x2000 +#define DEFMASK 0xFF00 +#define COMMAND_ONLY 0xFE +#define DATA_ONLY 0xFF + +#define MIN_BRIGHTNESS 0 +#define MAX_BRIGHTNESS 10 + +struct s6e63m0 { + struct device *dev; + struct spi_device *spi; + unsigned int power; + unsigned int current_brightness; + unsigned int gamma_mode; + unsigned int gamma_table_count; + struct lcd_device *ld; + struct backlight_device *bd; + struct lcd_platform_data *lcd_pd; +}; + +static const unsigned short seq_panel_condition_set[] = { + 0xF8, 0x01, + DATA_ONLY, 0x27, + DATA_ONLY, 0x27, + DATA_ONLY, 0x07, + DATA_ONLY, 0x07, + DATA_ONLY, 0x54, + DATA_ONLY, 0x9f, + DATA_ONLY, 0x63, + DATA_ONLY, 0x86, + DATA_ONLY, 0x1a, + DATA_ONLY, 0x33, + DATA_ONLY, 0x0d, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_display_condition_set[] = { + 0xf2, 0x02, + DATA_ONLY, 0x03, + DATA_ONLY, 0x1c, + DATA_ONLY, 0x10, + DATA_ONLY, 0x10, + + 0xf7, 0x03, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_gamma_setting[] = { + 0xfa, 0x00, + DATA_ONLY, 0x18, + DATA_ONLY, 0x08, + DATA_ONLY, 0x24, + DATA_ONLY, 0x64, + DATA_ONLY, 0x56, + DATA_ONLY, 0x33, + DATA_ONLY, 0xb6, + DATA_ONLY, 0xba, + DATA_ONLY, 0xa8, + DATA_ONLY, 0xac, + DATA_ONLY, 0xb1, + DATA_ONLY, 0x9d, + DATA_ONLY, 0xc1, + DATA_ONLY, 0xc1, + DATA_ONLY, 0xb7, + DATA_ONLY, 0x00, + DATA_ONLY, 0x9c, + DATA_ONLY, 0x00, + DATA_ONLY, 0x9f, + DATA_ONLY, 0x00, + DATA_ONLY, 0xd6, + + 0xfa, 0x01, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_etc_condition_set[] = { + 0xf6, 0x00, + DATA_ONLY, 0x8c, + DATA_ONLY, 0x07, + + 0xb3, 0xc, + + 0xb5, 0x2c, + DATA_ONLY, 0x12, + DATA_ONLY, 0x0c, + DATA_ONLY, 0x0a, + DATA_ONLY, 0x10, + DATA_ONLY, 0x0e, + DATA_ONLY, 0x17, + DATA_ONLY, 0x13, + DATA_ONLY, 0x1f, + DATA_ONLY, 0x1a, + DATA_ONLY, 0x2a, + DATA_ONLY, 0x24, + DATA_ONLY, 0x1f, + DATA_ONLY, 0x1b, + DATA_ONLY, 0x1a, + DATA_ONLY, 0x17, + + DATA_ONLY, 0x2b, + DATA_ONLY, 0x26, + DATA_ONLY, 0x22, + DATA_ONLY, 0x20, + DATA_ONLY, 0x3a, + DATA_ONLY, 0x34, + DATA_ONLY, 0x30, + DATA_ONLY, 0x2c, + DATA_ONLY, 0x29, + DATA_ONLY, 0x26, + DATA_ONLY, 0x25, + DATA_ONLY, 0x23, + DATA_ONLY, 0x21, + DATA_ONLY, 0x20, + DATA_ONLY, 0x1e, + DATA_ONLY, 0x1e, + + 0xb6, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x11, + DATA_ONLY, 0x22, + DATA_ONLY, 0x33, + DATA_ONLY, 0x44, + DATA_ONLY, 0x44, + DATA_ONLY, 0x44, + + DATA_ONLY, 0x55, + DATA_ONLY, 0x55, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + + 0xb7, 0x2c, + DATA_ONLY, 0x12, + DATA_ONLY, 0x0c, + DATA_ONLY, 0x0a, + DATA_ONLY, 0x10, + DATA_ONLY, 0x0e, + DATA_ONLY, 0x17, + DATA_ONLY, 0x13, + DATA_ONLY, 0x1f, + DATA_ONLY, 0x1a, + DATA_ONLY, 0x2a, + DATA_ONLY, 0x24, + DATA_ONLY, 0x1f, + DATA_ONLY, 0x1b, + DATA_ONLY, 0x1a, + DATA_ONLY, 0x17, + + DATA_ONLY, 0x2b, + DATA_ONLY, 0x26, + DATA_ONLY, 0x22, + DATA_ONLY, 0x20, + DATA_ONLY, 0x3a, + DATA_ONLY, 0x34, + DATA_ONLY, 0x30, + DATA_ONLY, 0x2c, + DATA_ONLY, 0x29, + DATA_ONLY, 0x26, + DATA_ONLY, 0x25, + DATA_ONLY, 0x23, + DATA_ONLY, 0x21, + DATA_ONLY, 0x20, + DATA_ONLY, 0x1e, + DATA_ONLY, 0x1e, + + 0xb8, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x11, + DATA_ONLY, 0x22, + DATA_ONLY, 0x33, + DATA_ONLY, 0x44, + DATA_ONLY, 0x44, + DATA_ONLY, 0x44, + + DATA_ONLY, 0x55, + DATA_ONLY, 0x55, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + + 0xb9, 0x2c, + DATA_ONLY, 0x12, + DATA_ONLY, 0x0c, + DATA_ONLY, 0x0a, + DATA_ONLY, 0x10, + DATA_ONLY, 0x0e, + DATA_ONLY, 0x17, + DATA_ONLY, 0x13, + DATA_ONLY, 0x1f, + DATA_ONLY, 0x1a, + DATA_ONLY, 0x2a, + DATA_ONLY, 0x24, + DATA_ONLY, 0x1f, + DATA_ONLY, 0x1b, + DATA_ONLY, 0x1a, + DATA_ONLY, 0x17, + + DATA_ONLY, 0x2b, + DATA_ONLY, 0x26, + DATA_ONLY, 0x22, + DATA_ONLY, 0x20, + DATA_ONLY, 0x3a, + DATA_ONLY, 0x34, + DATA_ONLY, 0x30, + DATA_ONLY, 0x2c, + DATA_ONLY, 0x29, + DATA_ONLY, 0x26, + DATA_ONLY, 0x25, + DATA_ONLY, 0x23, + DATA_ONLY, 0x21, + DATA_ONLY, 0x20, + DATA_ONLY, 0x1e, + DATA_ONLY, 0x1e, + + 0xba, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x11, + DATA_ONLY, 0x22, + DATA_ONLY, 0x33, + DATA_ONLY, 0x44, + DATA_ONLY, 0x44, + DATA_ONLY, 0x44, + + DATA_ONLY, 0x55, + DATA_ONLY, 0x55, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + DATA_ONLY, 0x66, + + 0xc1, 0x4d, + DATA_ONLY, 0x96, + DATA_ONLY, 0x1d, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x01, + DATA_ONLY, 0xdf, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + DATA_ONLY, 0x1f, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x00, + DATA_ONLY, 0x03, + DATA_ONLY, 0x06, + DATA_ONLY, 0x09, + DATA_ONLY, 0x0d, + DATA_ONLY, 0x0f, + DATA_ONLY, 0x12, + DATA_ONLY, 0x15, + DATA_ONLY, 0x18, + + 0xb2, 0x10, + DATA_ONLY, 0x10, + DATA_ONLY, 0x0b, + DATA_ONLY, 0x05, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_acl_on[] = { + /* ACL on */ + 0xc0, 0x01, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_acl_off[] = { + /* ACL off */ + 0xc0, 0x00, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_elvss_on[] = { + /* ELVSS on */ + 0xb1, 0x0b, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_elvss_off[] = { + /* ELVSS off */ + 0xb1, 0x0a, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_stand_by_off[] = { + 0x11, COMMAND_ONLY, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_stand_by_on[] = { + 0x10, COMMAND_ONLY, + + ENDDEF, 0x0000 +}; + +static const unsigned short seq_display_on[] = { + 0x29, COMMAND_ONLY, + + ENDDEF, 0x0000 +}; + + +static int s6e63m0_spi_write_byte(struct s6e63m0 *lcd, int addr, int data) +{ + u16 buf[1]; + struct spi_message msg; + + struct spi_transfer xfer = { + .len = 2, + .tx_buf = buf, + }; + + buf[0] = (addr << 8) | data; + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + return spi_sync(lcd->spi, &msg); +} + +static int s6e63m0_spi_write(struct s6e63m0 *lcd, unsigned char address, + unsigned char command) +{ + int ret = 0; + + if (address != DATA_ONLY) + ret = s6e63m0_spi_write_byte(lcd, 0x0, address); + if (command != COMMAND_ONLY) + ret = s6e63m0_spi_write_byte(lcd, 0x1, command); + + return ret; +} + +static int s6e63m0_panel_send_sequence(struct s6e63m0 *lcd, + const unsigned short *wbuf) +{ + int ret = 0, i = 0; + + while ((wbuf[i] & DEFMASK) != ENDDEF) { + if ((wbuf[i] & DEFMASK) != SLEEPMSEC) { + ret = s6e63m0_spi_write(lcd, wbuf[i], wbuf[i+1]); + if (ret) + break; + } else { + msleep(wbuf[i+1]); + } + i += 2; + } + + return ret; +} + +static int _s6e63m0_gamma_ctl(struct s6e63m0 *lcd, const unsigned int *gamma) +{ + unsigned int i = 0; + int ret = 0; + + /* disable gamma table updating. */ + ret = s6e63m0_spi_write(lcd, 0xfa, 0x00); + if (ret) { + dev_err(lcd->dev, "failed to disable gamma table updating.\n"); + goto gamma_err; + } + + for (i = 0 ; i < GAMMA_TABLE_COUNT; i++) { + ret = s6e63m0_spi_write(lcd, DATA_ONLY, gamma[i]); + if (ret) { + dev_err(lcd->dev, "failed to set gamma table.\n"); + goto gamma_err; + } + } + + /* update gamma table. */ + ret = s6e63m0_spi_write(lcd, 0xfa, 0x01); + if (ret) + dev_err(lcd->dev, "failed to update gamma table.\n"); + +gamma_err: + return ret; +} + +static int s6e63m0_gamma_ctl(struct s6e63m0 *lcd, int gamma) +{ + int ret = 0; + + ret = _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]); + + return ret; +} + + +static int s6e63m0_ldi_init(struct s6e63m0 *lcd) +{ + int ret, i; + const unsigned short *init_seq[] = { + seq_panel_condition_set, + seq_display_condition_set, + seq_gamma_setting, + seq_etc_condition_set, + seq_acl_on, + seq_elvss_on, + }; + + for (i = 0; i < ARRAY_SIZE(init_seq); i++) { + ret = s6e63m0_panel_send_sequence(lcd, init_seq[i]); + if (ret) + break; + } + + return ret; +} + +static int s6e63m0_ldi_enable(struct s6e63m0 *lcd) +{ + int ret = 0, i; + const unsigned short *enable_seq[] = { + seq_stand_by_off, + seq_display_on, + }; + + for (i = 0; i < ARRAY_SIZE(enable_seq); i++) { + ret = s6e63m0_panel_send_sequence(lcd, enable_seq[i]); + if (ret) + break; + } + + return ret; +} + +static int s6e63m0_ldi_disable(struct s6e63m0 *lcd) +{ + int ret; + + ret = s6e63m0_panel_send_sequence(lcd, seq_stand_by_on); + + return ret; +} + +static int s6e63m0_power_is_on(int power) +{ + return power <= FB_BLANK_NORMAL; +} + +static int s6e63m0_power_on(struct s6e63m0 *lcd) +{ + int ret = 0; + struct lcd_platform_data *pd; + struct backlight_device *bd; + + pd = lcd->lcd_pd; + bd = lcd->bd; + + if (!pd->power_on) { + dev_err(lcd->dev, "power_on is NULL.\n"); + return -EINVAL; + } else { + pd->power_on(lcd->ld, 1); + msleep(pd->power_on_delay); + } + + if (!pd->reset) { + dev_err(lcd->dev, "reset is NULL.\n"); + return -EINVAL; + } else { + pd->reset(lcd->ld); + msleep(pd->reset_delay); + } + + ret = s6e63m0_ldi_init(lcd); + if (ret) { + dev_err(lcd->dev, "failed to initialize ldi.\n"); + return ret; + } + + ret = s6e63m0_ldi_enable(lcd); + if (ret) { + dev_err(lcd->dev, "failed to enable ldi.\n"); + return ret; + } + + /* set brightness to current value after power on or resume. */ + ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness); + if (ret) { + dev_err(lcd->dev, "lcd gamma setting failed.\n"); + return ret; + } + + return 0; +} + +static int s6e63m0_power_off(struct s6e63m0 *lcd) +{ + int ret; + struct lcd_platform_data *pd; + + pd = lcd->lcd_pd; + + ret = s6e63m0_ldi_disable(lcd); + if (ret) { + dev_err(lcd->dev, "lcd setting failed.\n"); + return -EIO; + } + + msleep(pd->power_off_delay); + + pd->power_on(lcd->ld, 0); + + return 0; +} + +static int s6e63m0_power(struct s6e63m0 *lcd, int power) +{ + int ret = 0; + + if (s6e63m0_power_is_on(power) && !s6e63m0_power_is_on(lcd->power)) + ret = s6e63m0_power_on(lcd); + else if (!s6e63m0_power_is_on(power) && s6e63m0_power_is_on(lcd->power)) + ret = s6e63m0_power_off(lcd); + + if (!ret) + lcd->power = power; + + return ret; +} + +static int s6e63m0_set_power(struct lcd_device *ld, int power) +{ + struct s6e63m0 *lcd = lcd_get_data(ld); + + if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && + power != FB_BLANK_NORMAL) { + dev_err(lcd->dev, "power value should be 0, 1 or 4.\n"); + return -EINVAL; + } + + return s6e63m0_power(lcd, power); +} + +static int s6e63m0_get_power(struct lcd_device *ld) +{ + struct s6e63m0 *lcd = lcd_get_data(ld); + + return lcd->power; +} + +static int s6e63m0_get_brightness(struct backlight_device *bd) +{ + return bd->props.brightness; +} + +static int s6e63m0_set_brightness(struct backlight_device *bd) +{ + int ret = 0, brightness = bd->props.brightness; + struct s6e63m0 *lcd = bl_get_data(bd); + + if (brightness < MIN_BRIGHTNESS || + brightness > bd->props.max_brightness) { + dev_err(&bd->dev, "lcd brightness should be %d to %d.\n", + MIN_BRIGHTNESS, MAX_BRIGHTNESS); + return -EINVAL; + } + + ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness); + if (ret) { + dev_err(&bd->dev, "lcd brightness setting failed.\n"); + return -EIO; + } + + return ret; +} + +static struct lcd_ops s6e63m0_lcd_ops = { + .set_power = s6e63m0_set_power, + .get_power = s6e63m0_get_power, +}; + +static const struct backlight_ops s6e63m0_backlight_ops = { + .get_brightness = s6e63m0_get_brightness, + .update_status = s6e63m0_set_brightness, +}; + +static ssize_t s6e63m0_sysfs_show_gamma_mode(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct s6e63m0 *lcd = dev_get_drvdata(dev); + char temp[10]; + + switch (lcd->gamma_mode) { + case 0: + sprintf(temp, "2.2 mode\n"); + strcat(buf, temp); + break; + case 1: + sprintf(temp, "1.9 mode\n"); + strcat(buf, temp); + break; + case 2: + sprintf(temp, "1.7 mode\n"); + strcat(buf, temp); + break; + default: + dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7)n"); + break; + } + + return strlen(buf); +} + +static ssize_t s6e63m0_sysfs_store_gamma_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct s6e63m0 *lcd = dev_get_drvdata(dev); + struct backlight_device *bd = NULL; + int brightness, rc; + + rc = kstrtouint(buf, 0, &lcd->gamma_mode); + if (rc < 0) + return rc; + + bd = lcd->bd; + + brightness = bd->props.brightness; + + switch (lcd->gamma_mode) { + case 0: + _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]); + break; + case 1: + _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_19_table[brightness]); + break; + case 2: + _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_17_table[brightness]); + break; + default: + dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7\n"); + _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]); + break; + } + return len; +} + +static DEVICE_ATTR(gamma_mode, 0644, + s6e63m0_sysfs_show_gamma_mode, s6e63m0_sysfs_store_gamma_mode); + +static ssize_t s6e63m0_sysfs_show_gamma_table(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct s6e63m0 *lcd = dev_get_drvdata(dev); + char temp[3]; + + sprintf(temp, "%u\n", lcd->gamma_table_count); + strcpy(buf, temp); + + return strlen(buf); +} +static DEVICE_ATTR(gamma_table, 0444, + s6e63m0_sysfs_show_gamma_table, NULL); + +static int s6e63m0_probe(struct spi_device *spi) +{ + int ret = 0; + struct s6e63m0 *lcd = NULL; + struct lcd_device *ld = NULL; + struct backlight_device *bd = NULL; + struct backlight_properties props; + + lcd = devm_kzalloc(&spi->dev, sizeof(struct s6e63m0), GFP_KERNEL); + if (!lcd) + return -ENOMEM; + + /* s6e63m0 lcd panel uses 3-wire 9bits SPI Mode. */ + spi->bits_per_word = 9; + + ret = spi_setup(spi); + if (ret < 0) { + dev_err(&spi->dev, "spi setup failed.\n"); + return ret; + } + + lcd->spi = spi; + lcd->dev = &spi->dev; + + lcd->lcd_pd = dev_get_platdata(&spi->dev); + if (!lcd->lcd_pd) { + dev_err(&spi->dev, "platform data is NULL.\n"); + return -EINVAL; + } + + ld = devm_lcd_device_register(&spi->dev, "s6e63m0", &spi->dev, lcd, + &s6e63m0_lcd_ops); + if (IS_ERR(ld)) + return PTR_ERR(ld); + + lcd->ld = ld; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = MAX_BRIGHTNESS; + + bd = devm_backlight_device_register(&spi->dev, "s6e63m0bl-bl", + &spi->dev, lcd, &s6e63m0_backlight_ops, + &props); + if (IS_ERR(bd)) + return PTR_ERR(bd); + + bd->props.brightness = MAX_BRIGHTNESS; + lcd->bd = bd; + + /* + * it gets gamma table count available so it gets user + * know that. + */ + lcd->gamma_table_count = + sizeof(gamma_table) / (MAX_GAMMA_LEVEL * sizeof(int *)); + + ret = device_create_file(&(spi->dev), &dev_attr_gamma_mode); + if (ret < 0) + dev_err(&(spi->dev), "failed to add sysfs entries\n"); + + ret = device_create_file(&(spi->dev), &dev_attr_gamma_table); + if (ret < 0) + dev_err(&(spi->dev), "failed to add sysfs entries\n"); + + /* + * if lcd panel was on from bootloader like u-boot then + * do not lcd on. + */ + if (!lcd->lcd_pd->lcd_enabled) { + /* + * if lcd panel was off from bootloader then + * current lcd status is powerdown and then + * it enables lcd panel. + */ + lcd->power = FB_BLANK_POWERDOWN; + + s6e63m0_power(lcd, FB_BLANK_UNBLANK); + } else { + lcd->power = FB_BLANK_UNBLANK; + } + + spi_set_drvdata(spi, lcd); + + dev_info(&spi->dev, "s6e63m0 panel driver has been probed.\n"); + + return 0; +} + +static int s6e63m0_remove(struct spi_device *spi) +{ + struct s6e63m0 *lcd = spi_get_drvdata(spi); + + s6e63m0_power(lcd, FB_BLANK_POWERDOWN); + device_remove_file(&spi->dev, &dev_attr_gamma_table); + device_remove_file(&spi->dev, &dev_attr_gamma_mode); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int s6e63m0_suspend(struct device *dev) +{ + struct s6e63m0 *lcd = dev_get_drvdata(dev); + + dev_dbg(dev, "lcd->power = %d\n", lcd->power); + + /* + * when lcd panel is suspend, lcd panel becomes off + * regardless of status. + */ + return s6e63m0_power(lcd, FB_BLANK_POWERDOWN); +} + +static int s6e63m0_resume(struct device *dev) +{ + struct s6e63m0 *lcd = dev_get_drvdata(dev); + + lcd->power = FB_BLANK_POWERDOWN; + + return s6e63m0_power(lcd, FB_BLANK_UNBLANK); +} +#endif + +static SIMPLE_DEV_PM_OPS(s6e63m0_pm_ops, s6e63m0_suspend, s6e63m0_resume); + +/* Power down all displays on reboot, poweroff or halt. */ +static void s6e63m0_shutdown(struct spi_device *spi) +{ + struct s6e63m0 *lcd = spi_get_drvdata(spi); + + s6e63m0_power(lcd, FB_BLANK_POWERDOWN); +} + +static struct spi_driver s6e63m0_driver = { + .driver = { + .name = "s6e63m0", + .owner = THIS_MODULE, + .pm = &s6e63m0_pm_ops, + }, + .probe = s6e63m0_probe, + .remove = s6e63m0_remove, + .shutdown = s6e63m0_shutdown, +}; + +module_spi_driver(s6e63m0_driver); + +MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>"); +MODULE_DESCRIPTION("S6E63M0 LCD Driver"); +MODULE_LICENSE("GPL"); + diff --git a/drivers/video/backlight/s6e63m0_gamma.h b/drivers/video/backlight/s6e63m0_gamma.h new file mode 100644 index 00000000000..2c44bdb0696 --- /dev/null +++ b/drivers/video/backlight/s6e63m0_gamma.h @@ -0,0 +1,266 @@ +/* linux/drivers/video/samsung/s6e63m0_brightness.h + * + * Gamma level definitions. + * + * Copyright (c) 2009 Samsung Electronics + * InKi Dae <inki.dae@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#ifndef _S6E63M0_BRIGHTNESS_H +#define _S6E63M0_BRIGHTNESS_H + +#define MAX_GAMMA_LEVEL 11 +#define GAMMA_TABLE_COUNT 21 + +/* gamma value: 2.2 */ +static const unsigned int s6e63m0_22_300[] = { + 0x18, 0x08, 0x24, 0x5f, 0x50, 0x2d, 0xB6, + 0xB9, 0xA7, 0xAd, 0xB1, 0x9f, 0xbe, 0xC0, + 0xB5, 0x00, 0xa0, 0x00, 0xa4, 0x00, 0xdb +}; + +static const unsigned int s6e63m0_22_280[] = { + 0x18, 0x08, 0x24, 0x64, 0x56, 0x33, 0xB6, + 0xBA, 0xA8, 0xAC, 0xB1, 0x9D, 0xC1, 0xC1, + 0xB7, 0x00, 0x9C, 0x00, 0x9F, 0x00, 0xD6 +}; + +static const unsigned int s6e63m0_22_260[] = { + 0x18, 0x08, 0x24, 0x66, 0x58, 0x34, 0xB6, + 0xBA, 0xA7, 0xAF, 0xB3, 0xA0, 0xC1, 0xC2, + 0xB7, 0x00, 0x97, 0x00, 0x9A, 0x00, 0xD1 + +}; + +static const unsigned int s6e63m0_22_240[] = { + 0x18, 0x08, 0x24, 0x62, 0x54, 0x30, 0xB9, + 0xBB, 0xA9, 0xB0, 0xB3, 0xA1, 0xC1, 0xC3, + 0xB7, 0x00, 0x91, 0x00, 0x95, 0x00, 0xDA + +}; +static const unsigned int s6e63m0_22_220[] = { + 0x18, 0x08, 0x24, 0x63, 0x53, 0x31, 0xB8, + 0xBC, 0xA9, 0xB0, 0xB5, 0xA2, 0xC4, 0xC4, + 0xB8, 0x00, 0x8B, 0x00, 0x8E, 0x00, 0xC2 +}; + +static const unsigned int s6e63m0_22_200[] = { + 0x18, 0x08, 0x24, 0x66, 0x55, 0x34, 0xBA, + 0xBD, 0xAB, 0xB1, 0xB5, 0xA3, 0xC5, 0xC6, + 0xB9, 0x00, 0x85, 0x00, 0x88, 0x00, 0xBA +}; + +static const unsigned int s6e63m0_22_170[] = { + 0x18, 0x08, 0x24, 0x69, 0x54, 0x37, 0xBB, + 0xBE, 0xAC, 0xB4, 0xB7, 0xA6, 0xC7, 0xC8, + 0xBC, 0x00, 0x7B, 0x00, 0x7E, 0x00, 0xAB +}; + +static const unsigned int s6e63m0_22_140[] = { + 0x18, 0x08, 0x24, 0x6C, 0x54, 0x3A, 0xBC, + 0xBF, 0xAC, 0xB7, 0xBB, 0xA9, 0xC9, 0xC9, + 0xBE, 0x00, 0x71, 0x00, 0x73, 0x00, 0x9E +}; + +static const unsigned int s6e63m0_22_110[] = { + 0x18, 0x08, 0x24, 0x70, 0x51, 0x3E, 0xBF, + 0xC1, 0xAF, 0xB9, 0xBC, 0xAB, 0xCC, 0xCC, + 0xC2, 0x00, 0x65, 0x00, 0x67, 0x00, 0x8D +}; + +static const unsigned int s6e63m0_22_90[] = { + 0x18, 0x08, 0x24, 0x73, 0x4A, 0x3D, 0xC0, + 0xC2, 0xB1, 0xBB, 0xBE, 0xAC, 0xCE, 0xCF, + 0xC5, 0x00, 0x5D, 0x00, 0x5E, 0x00, 0x82 +}; + +static const unsigned int s6e63m0_22_30[] = { + 0x18, 0x08, 0x24, 0x78, 0xEC, 0x3D, 0xC8, + 0xC2, 0xB6, 0xC4, 0xC7, 0xB6, 0xD5, 0xD7, + 0xCC, 0x00, 0x39, 0x00, 0x36, 0x00, 0x51 +}; + +/* gamma value: 1.9 */ +static const unsigned int s6e63m0_19_300[] = { + 0x18, 0x08, 0x24, 0x61, 0x5F, 0x39, 0xBA, + 0xBD, 0xAD, 0xB1, 0xB6, 0xA5, 0xC4, 0xC5, + 0xBC, 0x00, 0xA0, 0x00, 0xA4, 0x00, 0xDB +}; + +static const unsigned int s6e63m0_19_280[] = { + 0x18, 0x08, 0x24, 0x61, 0x60, 0x39, 0xBB, + 0xBE, 0xAD, 0xB2, 0xB6, 0xA6, 0xC5, 0xC7, + 0xBD, 0x00, 0x9B, 0x00, 0x9E, 0x00, 0xD5 +}; + +static const unsigned int s6e63m0_19_260[] = { + 0x18, 0x08, 0x24, 0x63, 0x61, 0x3B, 0xBA, + 0xBE, 0xAC, 0xB3, 0xB8, 0xA7, 0xC6, 0xC8, + 0xBD, 0x00, 0x96, 0x00, 0x98, 0x00, 0xCF +}; + +static const unsigned int s6e63m0_19_240[] = { + 0x18, 0x08, 0x24, 0x67, 0x64, 0x3F, 0xBB, + 0xBE, 0xAD, 0xB3, 0xB9, 0xA7, 0xC8, 0xC9, + 0xBE, 0x00, 0x90, 0x00, 0x92, 0x00, 0xC8 +}; + +static const unsigned int s6e63m0_19_220[] = { + 0x18, 0x08, 0x24, 0x68, 0x64, 0x40, 0xBC, + 0xBF, 0xAF, 0xB4, 0xBA, 0xA9, 0xC8, 0xCA, + 0xBE, 0x00, 0x8B, 0x00, 0x8C, 0x00, 0xC0 +}; + +static const unsigned int s6e63m0_19_200[] = { + 0x18, 0x08, 0x24, 0x68, 0x64, 0x3F, 0xBE, + 0xC0, 0xB0, 0xB6, 0xBB, 0xAB, 0xC8, 0xCB, + 0xBF, 0x00, 0x85, 0x00, 0x86, 0x00, 0xB8 +}; + +static const unsigned int s6e63m0_19_170[] = { + 0x18, 0x08, 0x24, 0x69, 0x64, 0x40, 0xBF, + 0xC1, 0xB0, 0xB9, 0xBE, 0xAD, 0xCB, 0xCD, + 0xC2, 0x00, 0x7A, 0x00, 0x7B, 0x00, 0xAA +}; + +static const unsigned int s6e63m0_19_140[] = { + 0x18, 0x08, 0x24, 0x6E, 0x65, 0x45, 0xC0, + 0xC3, 0xB2, 0xBA, 0xBE, 0xAE, 0xCD, 0xD0, + 0xC4, 0x00, 0x70, 0x00, 0x70, 0x00, 0x9C +}; + +static const unsigned int s6e63m0_19_110[] = { + 0x18, 0x08, 0x24, 0x6F, 0x65, 0x46, 0xC2, + 0xC4, 0xB3, 0xBF, 0xC2, 0xB2, 0xCF, 0xD1, + 0xC6, 0x00, 0x64, 0x00, 0x64, 0x00, 0x8D +}; + +static const unsigned int s6e63m0_19_90[] = { + 0x18, 0x08, 0x24, 0x74, 0x60, 0x4A, 0xC3, + 0xC6, 0xB5, 0xBF, 0xC3, 0xB2, 0xD2, 0xD3, + 0xC8, 0x00, 0x5B, 0x00, 0x5B, 0x00, 0x81 +}; + +static const unsigned int s6e63m0_19_30[] = { + 0x18, 0x08, 0x24, 0x84, 0x45, 0x4F, 0xCA, + 0xCB, 0xBC, 0xC9, 0xCB, 0xBC, 0xDA, 0xDA, + 0xD0, 0x00, 0x35, 0x00, 0x34, 0x00, 0x4E +}; + +/* gamma value: 1.7 */ +static const unsigned int s6e63m0_17_300[] = { + 0x18, 0x08, 0x24, 0x70, 0x70, 0x4F, 0xBF, + 0xC2, 0xB2, 0xB8, 0xBC, 0xAC, 0xCB, 0xCD, + 0xC3, 0x00, 0xA0, 0x00, 0xA4, 0x00, 0xDB +}; + +static const unsigned int s6e63m0_17_280[] = { + 0x18, 0x08, 0x24, 0x71, 0x71, 0x50, 0xBF, + 0xC2, 0xB2, 0xBA, 0xBE, 0xAE, 0xCB, 0xCD, + 0xC3, 0x00, 0x9C, 0x00, 0x9F, 0x00, 0xD6 +}; + +static const unsigned int s6e63m0_17_260[] = { + 0x18, 0x08, 0x24, 0x72, 0x72, 0x50, 0xC0, + 0xC3, 0xB4, 0xB9, 0xBE, 0xAE, 0xCC, 0xCF, + 0xC4, 0x00, 0x97, 0x00, 0x9A, 0x00, 0xD1 +}; + +static const unsigned int s6e63m0_17_240[] = { + 0x18, 0x08, 0x24, 0x71, 0x72, 0x4F, 0xC2, + 0xC4, 0xB5, 0xBB, 0xBF, 0xB0, 0xCC, 0xCF, + 0xC3, 0x00, 0x91, 0x00, 0x95, 0x00, 0xCA +}; + +static const unsigned int s6e63m0_17_220[] = { + 0x18, 0x08, 0x24, 0x71, 0x73, 0x4F, 0xC2, + 0xC5, 0xB5, 0xBD, 0xC0, 0xB2, 0xCD, 0xD1, + 0xC5, 0x00, 0x8B, 0x00, 0x8E, 0x00, 0xC2 +}; + +static const unsigned int s6e63m0_17_200[] = { + 0x18, 0x08, 0x24, 0x72, 0x75, 0x51, 0xC2, + 0xC6, 0xB5, 0xBF, 0xC1, 0xB3, 0xCE, 0xD1, + 0xC6, 0x00, 0x85, 0x00, 0x88, 0x00, 0xBA +}; + +static const unsigned int s6e63m0_17_170[] = { + 0x18, 0x08, 0x24, 0x75, 0x77, 0x54, 0xC3, + 0xC7, 0xB7, 0xC0, 0xC3, 0xB4, 0xD1, 0xD3, + 0xC9, 0x00, 0x7B, 0x00, 0x7E, 0x00, 0xAB +}; + +static const unsigned int s6e63m0_17_140[] = { + 0x18, 0x08, 0x24, 0x7B, 0x77, 0x58, 0xC3, + 0xC8, 0xB8, 0xC2, 0xC6, 0xB6, 0xD3, 0xD4, + 0xCA, 0x00, 0x71, 0x00, 0x73, 0x00, 0x9E +}; + +static const unsigned int s6e63m0_17_110[] = { + 0x18, 0x08, 0x24, 0x81, 0x7B, 0x5D, 0xC6, + 0xCA, 0xBB, 0xC3, 0xC7, 0xB8, 0xD6, 0xD8, + 0xCD, 0x00, 0x65, 0x00, 0x67, 0x00, 0x8D +}; + +static const unsigned int s6e63m0_17_90[] = { + 0x18, 0x08, 0x24, 0x82, 0x7A, 0x5B, 0xC8, + 0xCB, 0xBD, 0xC5, 0xCA, 0xBA, 0xD6, 0xD8, + 0xCE, 0x00, 0x5D, 0x00, 0x5E, 0x00, 0x82 +}; + +static const unsigned int s6e63m0_17_30[] = { + 0x18, 0x08, 0x24, 0x8F, 0x73, 0x63, 0xD1, + 0xD0, 0xC5, 0xCC, 0xD1, 0xC2, 0xDE, 0xE0, + 0xD6, 0x00, 0x39, 0x00, 0x36, 0x00, 0x51 +}; + +struct s6e63m0_gamma { + unsigned int *gamma_22_table[MAX_GAMMA_LEVEL]; + unsigned int *gamma_19_table[MAX_GAMMA_LEVEL]; + unsigned int *gamma_17_table[MAX_GAMMA_LEVEL]; +}; + +static struct s6e63m0_gamma gamma_table = { + .gamma_22_table[0] = (unsigned int *)&s6e63m0_22_30, + .gamma_22_table[1] = (unsigned int *)&s6e63m0_22_90, + .gamma_22_table[2] = (unsigned int *)&s6e63m0_22_110, + .gamma_22_table[3] = (unsigned int *)&s6e63m0_22_140, + .gamma_22_table[4] = (unsigned int *)&s6e63m0_22_170, + .gamma_22_table[5] = (unsigned int *)&s6e63m0_22_200, + .gamma_22_table[6] = (unsigned int *)&s6e63m0_22_220, + .gamma_22_table[7] = (unsigned int *)&s6e63m0_22_240, + .gamma_22_table[8] = (unsigned int *)&s6e63m0_22_260, + .gamma_22_table[9] = (unsigned int *)&s6e63m0_22_280, + .gamma_22_table[10] = (unsigned int *)&s6e63m0_22_300, + + .gamma_19_table[0] = (unsigned int *)&s6e63m0_19_30, + .gamma_19_table[1] = (unsigned int *)&s6e63m0_19_90, + .gamma_19_table[2] = (unsigned int *)&s6e63m0_19_110, + .gamma_19_table[3] = (unsigned int *)&s6e63m0_19_140, + .gamma_19_table[4] = (unsigned int *)&s6e63m0_19_170, + .gamma_19_table[5] = (unsigned int *)&s6e63m0_19_200, + .gamma_19_table[6] = (unsigned int *)&s6e63m0_19_220, + .gamma_19_table[7] = (unsigned int *)&s6e63m0_19_240, + .gamma_19_table[8] = (unsigned int *)&s6e63m0_19_260, + .gamma_19_table[9] = (unsigned int *)&s6e63m0_19_280, + .gamma_19_table[10] = (unsigned int *)&s6e63m0_19_300, + + .gamma_17_table[0] = (unsigned int *)&s6e63m0_17_30, + .gamma_17_table[1] = (unsigned int *)&s6e63m0_17_90, + .gamma_17_table[2] = (unsigned int *)&s6e63m0_17_110, + .gamma_17_table[3] = (unsigned int *)&s6e63m0_17_140, + .gamma_17_table[4] = (unsigned int *)&s6e63m0_17_170, + .gamma_17_table[5] = (unsigned int *)&s6e63m0_17_200, + .gamma_17_table[6] = (unsigned int *)&s6e63m0_17_220, + .gamma_17_table[7] = (unsigned int *)&s6e63m0_17_240, + .gamma_17_table[8] = (unsigned int *)&s6e63m0_17_260, + .gamma_17_table[9] = (unsigned int *)&s6e63m0_17_280, + .gamma_17_table[10] = (unsigned int *)&s6e63m0_17_300, +}; + +#endif + diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c new file mode 100644 index 00000000000..908016fc582 --- /dev/null +++ b/drivers/video/backlight/tdo24m.c @@ -0,0 +1,451 @@ +/* + * tdo24m - SPI-based drivers for Toppoly TDO24M series LCD panels + * + * Copyright (C) 2008 Marvell International Ltd. + * Eric Miao <eric.miao@marvell.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * publishhed by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/spi/spi.h> +#include <linux/spi/tdo24m.h> +#include <linux/fb.h> +#include <linux/lcd.h> +#include <linux/slab.h> + +#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) + +#define TDO24M_SPI_BUFF_SIZE (4) +#define MODE_QVGA 0 +#define MODE_VGA 1 + +struct tdo24m { + struct spi_device *spi_dev; + struct lcd_device *lcd_dev; + + struct spi_message msg; + struct spi_transfer xfer; + uint8_t *buf; + + int (*adj_mode)(struct tdo24m *lcd, int mode); + int color_invert; + + int power; + int mode; +}; + +/* use bit 30, 31 as the indicator of command parameter number */ +#define CMD0(x) ((0 << 30) | (x)) +#define CMD1(x, x1) ((1 << 30) | ((x) << 9) | 0x100 | (x1)) +#define CMD2(x, x1, x2) ((2 << 30) | ((x) << 18) | 0x20000 |\ + ((x1) << 9) | 0x100 | (x2)) +#define CMD_NULL (-1) + +static const uint32_t lcd_panel_reset[] = { + CMD0(0x1), /* reset */ + CMD0(0x0), /* nop */ + CMD0(0x0), /* nop */ + CMD0(0x0), /* nop */ + CMD_NULL, +}; + +static const uint32_t lcd_panel_on[] = { + CMD0(0x29), /* Display ON */ + CMD2(0xB8, 0xFF, 0xF9), /* Output Control */ + CMD0(0x11), /* Sleep out */ + CMD1(0xB0, 0x16), /* Wake */ + CMD_NULL, +}; + +static const uint32_t lcd_panel_off[] = { + CMD0(0x28), /* Display OFF */ + CMD2(0xB8, 0x80, 0x02), /* Output Control */ + CMD0(0x10), /* Sleep in */ + CMD1(0xB0, 0x00), /* Deep stand by in */ + CMD_NULL, +}; + +static const uint32_t lcd_vga_pass_through_tdo24m[] = { + CMD1(0xB0, 0x16), + CMD1(0xBC, 0x80), + CMD1(0xE1, 0x00), + CMD1(0x36, 0x50), + CMD1(0x3B, 0x00), + CMD_NULL, +}; + +static const uint32_t lcd_qvga_pass_through_tdo24m[] = { + CMD1(0xB0, 0x16), + CMD1(0xBC, 0x81), + CMD1(0xE1, 0x00), + CMD1(0x36, 0x50), + CMD1(0x3B, 0x22), + CMD_NULL, +}; + +static const uint32_t lcd_vga_transfer_tdo24m[] = { + CMD1(0xcf, 0x02), /* Blanking period control (1) */ + CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */ + CMD1(0xd1, 0x01), /* CKV timing control on/off */ + CMD2(0xd2, 0x14, 0x00), /* CKV 1,2 timing control */ + CMD2(0xd3, 0x1a, 0x0f), /* OEV timing control */ + CMD2(0xd4, 0x1f, 0xaf), /* ASW timing control (1) */ + CMD1(0xd5, 0x14), /* ASW timing control (2) */ + CMD0(0x21), /* Invert for normally black display */ + CMD0(0x29), /* Display on */ + CMD_NULL, +}; + +static const uint32_t lcd_qvga_transfer[] = { + CMD1(0xd6, 0x02), /* Blanking period control (1) */ + CMD2(0xd7, 0x08, 0x04), /* Blanking period control (2) */ + CMD1(0xd8, 0x01), /* CKV timing control on/off */ + CMD2(0xd9, 0x00, 0x08), /* CKV 1,2 timing control */ + CMD2(0xde, 0x05, 0x0a), /* OEV timing control */ + CMD2(0xdf, 0x0a, 0x19), /* ASW timing control (1) */ + CMD1(0xe0, 0x0a), /* ASW timing control (2) */ + CMD0(0x21), /* Invert for normally black display */ + CMD0(0x29), /* Display on */ + CMD_NULL, +}; + +static const uint32_t lcd_vga_pass_through_tdo35s[] = { + CMD1(0xB0, 0x16), + CMD1(0xBC, 0x80), + CMD1(0xE1, 0x00), + CMD1(0x3B, 0x00), + CMD_NULL, +}; + +static const uint32_t lcd_qvga_pass_through_tdo35s[] = { + CMD1(0xB0, 0x16), + CMD1(0xBC, 0x81), + CMD1(0xE1, 0x00), + CMD1(0x3B, 0x22), + CMD_NULL, +}; + +static const uint32_t lcd_vga_transfer_tdo35s[] = { + CMD1(0xcf, 0x02), /* Blanking period control (1) */ + CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */ + CMD1(0xd1, 0x01), /* CKV timing control on/off */ + CMD2(0xd2, 0x00, 0x1e), /* CKV 1,2 timing control */ + CMD2(0xd3, 0x14, 0x28), /* OEV timing control */ + CMD2(0xd4, 0x28, 0x64), /* ASW timing control (1) */ + CMD1(0xd5, 0x28), /* ASW timing control (2) */ + CMD0(0x21), /* Invert for normally black display */ + CMD0(0x29), /* Display on */ + CMD_NULL, +}; + +static const uint32_t lcd_panel_config[] = { + CMD2(0xb8, 0xff, 0xf9), /* Output control */ + CMD0(0x11), /* sleep out */ + CMD1(0xba, 0x01), /* Display mode (1) */ + CMD1(0xbb, 0x00), /* Display mode (2) */ + CMD1(0x3a, 0x60), /* Display mode 18-bit RGB */ + CMD1(0xbf, 0x10), /* Drive system change control */ + CMD1(0xb1, 0x56), /* Booster operation setup */ + CMD1(0xb2, 0x33), /* Booster mode setup */ + CMD1(0xb3, 0x11), /* Booster frequency setup */ + CMD1(0xb4, 0x02), /* Op amp/system clock */ + CMD1(0xb5, 0x35), /* VCS voltage */ + CMD1(0xb6, 0x40), /* VCOM voltage */ + CMD1(0xb7, 0x03), /* External display signal */ + CMD1(0xbd, 0x00), /* ASW slew rate */ + CMD1(0xbe, 0x00), /* Dummy data for QuadData operation */ + CMD1(0xc0, 0x11), /* Sleep out FR count (A) */ + CMD1(0xc1, 0x11), /* Sleep out FR count (B) */ + CMD1(0xc2, 0x11), /* Sleep out FR count (C) */ + CMD2(0xc3, 0x20, 0x40), /* Sleep out FR count (D) */ + CMD2(0xc4, 0x60, 0xc0), /* Sleep out FR count (E) */ + CMD2(0xc5, 0x10, 0x20), /* Sleep out FR count (F) */ + CMD1(0xc6, 0xc0), /* Sleep out FR count (G) */ + CMD2(0xc7, 0x33, 0x43), /* Gamma 1 fine tuning (1) */ + CMD1(0xc8, 0x44), /* Gamma 1 fine tuning (2) */ + CMD1(0xc9, 0x33), /* Gamma 1 inclination adjustment */ + CMD1(0xca, 0x00), /* Gamma 1 blue offset adjustment */ + CMD2(0xec, 0x01, 0xf0), /* Horizontal clock cycles */ + CMD_NULL, +}; + +static int tdo24m_writes(struct tdo24m *lcd, const uint32_t *array) +{ + struct spi_transfer *x = &lcd->xfer; + const uint32_t *p = array; + uint32_t data; + int nparams, err = 0; + + for (; *p != CMD_NULL; p++) { + if (!lcd->color_invert && *p == CMD0(0x21)) + continue; + + nparams = (*p >> 30) & 0x3; + + data = *p << (7 - nparams); + switch (nparams) { + case 0: + lcd->buf[0] = (data >> 8) & 0xff; + lcd->buf[1] = data & 0xff; + break; + case 1: + lcd->buf[0] = (data >> 16) & 0xff; + lcd->buf[1] = (data >> 8) & 0xff; + lcd->buf[2] = data & 0xff; + break; + case 2: + lcd->buf[0] = (data >> 24) & 0xff; + lcd->buf[1] = (data >> 16) & 0xff; + lcd->buf[2] = (data >> 8) & 0xff; + lcd->buf[3] = data & 0xff; + break; + default: + continue; + } + x->len = nparams + 2; + err = spi_sync(lcd->spi_dev, &lcd->msg); + if (err) + break; + } + + return err; +} + +static int tdo24m_adj_mode(struct tdo24m *lcd, int mode) +{ + switch (mode) { + case MODE_VGA: + tdo24m_writes(lcd, lcd_vga_pass_through_tdo24m); + tdo24m_writes(lcd, lcd_panel_config); + tdo24m_writes(lcd, lcd_vga_transfer_tdo24m); + break; + case MODE_QVGA: + tdo24m_writes(lcd, lcd_qvga_pass_through_tdo24m); + tdo24m_writes(lcd, lcd_panel_config); + tdo24m_writes(lcd, lcd_qvga_transfer); + break; + default: + return -EINVAL; + } + + lcd->mode = mode; + return 0; +} + +static int tdo35s_adj_mode(struct tdo24m *lcd, int mode) +{ + switch (mode) { + case MODE_VGA: + tdo24m_writes(lcd, lcd_vga_pass_through_tdo35s); + tdo24m_writes(lcd, lcd_panel_config); + tdo24m_writes(lcd, lcd_vga_transfer_tdo35s); + break; + case MODE_QVGA: + tdo24m_writes(lcd, lcd_qvga_pass_through_tdo35s); + tdo24m_writes(lcd, lcd_panel_config); + tdo24m_writes(lcd, lcd_qvga_transfer); + break; + default: + return -EINVAL; + } + + lcd->mode = mode; + return 0; +} + +static int tdo24m_power_on(struct tdo24m *lcd) +{ + int err; + + err = tdo24m_writes(lcd, lcd_panel_on); + if (err) + goto out; + + err = tdo24m_writes(lcd, lcd_panel_reset); + if (err) + goto out; + + err = lcd->adj_mode(lcd, lcd->mode); +out: + return err; +} + +static int tdo24m_power_off(struct tdo24m *lcd) +{ + return tdo24m_writes(lcd, lcd_panel_off); +} + +static int tdo24m_power(struct tdo24m *lcd, int power) +{ + int ret = 0; + + if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) + ret = tdo24m_power_on(lcd); + else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) + ret = tdo24m_power_off(lcd); + + if (!ret) + lcd->power = power; + + return ret; +} + + +static int tdo24m_set_power(struct lcd_device *ld, int power) +{ + struct tdo24m *lcd = lcd_get_data(ld); + return tdo24m_power(lcd, power); +} + +static int tdo24m_get_power(struct lcd_device *ld) +{ + struct tdo24m *lcd = lcd_get_data(ld); + return lcd->power; +} + +static int tdo24m_set_mode(struct lcd_device *ld, struct fb_videomode *m) +{ + struct tdo24m *lcd = lcd_get_data(ld); + int mode = MODE_QVGA; + + if (m->xres == 640 || m->xres == 480) + mode = MODE_VGA; + + if (lcd->mode == mode) + return 0; + + return lcd->adj_mode(lcd, mode); +} + +static struct lcd_ops tdo24m_ops = { + .get_power = tdo24m_get_power, + .set_power = tdo24m_set_power, + .set_mode = tdo24m_set_mode, +}; + +static int tdo24m_probe(struct spi_device *spi) +{ + struct tdo24m *lcd; + struct spi_message *m; + struct spi_transfer *x; + struct tdo24m_platform_data *pdata; + enum tdo24m_model model; + int err; + + pdata = dev_get_platdata(&spi->dev); + if (pdata) + model = pdata->model; + else + model = TDO24M; + + spi->bits_per_word = 8; + spi->mode = SPI_MODE_3; + err = spi_setup(spi); + if (err) + return err; + + lcd = devm_kzalloc(&spi->dev, sizeof(struct tdo24m), GFP_KERNEL); + if (!lcd) + return -ENOMEM; + + lcd->spi_dev = spi; + lcd->power = FB_BLANK_POWERDOWN; + lcd->mode = MODE_VGA; /* default to VGA */ + + lcd->buf = devm_kzalloc(&spi->dev, TDO24M_SPI_BUFF_SIZE, GFP_KERNEL); + if (lcd->buf == NULL) + return -ENOMEM; + + m = &lcd->msg; + x = &lcd->xfer; + + spi_message_init(m); + + x->cs_change = 1; + x->tx_buf = &lcd->buf[0]; + spi_message_add_tail(x, m); + + switch (model) { + case TDO24M: + lcd->color_invert = 1; + lcd->adj_mode = tdo24m_adj_mode; + break; + case TDO35S: + lcd->adj_mode = tdo35s_adj_mode; + lcd->color_invert = 0; + break; + default: + dev_err(&spi->dev, "Unsupported model"); + return -EINVAL; + } + + lcd->lcd_dev = devm_lcd_device_register(&spi->dev, "tdo24m", &spi->dev, + lcd, &tdo24m_ops); + if (IS_ERR(lcd->lcd_dev)) + return PTR_ERR(lcd->lcd_dev); + + spi_set_drvdata(spi, lcd); + err = tdo24m_power(lcd, FB_BLANK_UNBLANK); + if (err) + return err; + + return 0; +} + +static int tdo24m_remove(struct spi_device *spi) +{ + struct tdo24m *lcd = spi_get_drvdata(spi); + + tdo24m_power(lcd, FB_BLANK_POWERDOWN); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tdo24m_suspend(struct device *dev) +{ + struct tdo24m *lcd = dev_get_drvdata(dev); + + return tdo24m_power(lcd, FB_BLANK_POWERDOWN); +} + +static int tdo24m_resume(struct device *dev) +{ + struct tdo24m *lcd = dev_get_drvdata(dev); + + return tdo24m_power(lcd, FB_BLANK_UNBLANK); +} +#endif + +static SIMPLE_DEV_PM_OPS(tdo24m_pm_ops, tdo24m_suspend, tdo24m_resume); + +/* Power down all displays on reboot, poweroff or halt */ +static void tdo24m_shutdown(struct spi_device *spi) +{ + struct tdo24m *lcd = spi_get_drvdata(spi); + + tdo24m_power(lcd, FB_BLANK_POWERDOWN); +} + +static struct spi_driver tdo24m_driver = { + .driver = { + .name = "tdo24m", + .owner = THIS_MODULE, + .pm = &tdo24m_pm_ops, + }, + .probe = tdo24m_probe, + .remove = tdo24m_remove, + .shutdown = tdo24m_shutdown, +}; + +module_spi_driver(tdo24m_driver); + +MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); +MODULE_DESCRIPTION("Driver for Toppoly TDO24M LCD Panel"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:tdo24m"); diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c new file mode 100644 index 00000000000..3ad676558c8 --- /dev/null +++ b/drivers/video/backlight/tosa_bl.c @@ -0,0 +1,178 @@ +/* + * LCD / Backlight control code for Sharp SL-6000x (tosa) + * + * Copyright (c) 2005 Dirk Opfer + * Copyright (c) 2007,2008 Dmitry Baryshkov + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/spi/spi.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/slab.h> + +#include <asm/mach/sharpsl_param.h> + +#include <mach/tosa.h> + +#define COMADJ_DEFAULT 97 + +#define DAC_CH1 0 +#define DAC_CH2 1 + +struct tosa_bl_data { + struct i2c_client *i2c; + struct backlight_device *bl; + + int comadj; +}; + +static void tosa_bl_set_backlight(struct tosa_bl_data *data, int brightness) +{ + struct spi_device *spi = dev_get_platdata(&data->i2c->dev); + + i2c_smbus_write_byte_data(data->i2c, DAC_CH1, data->comadj); + + /* SetBacklightDuty */ + i2c_smbus_write_byte_data(data->i2c, DAC_CH2, (u8)(brightness & 0xff)); + + /* SetBacklightVR */ + gpio_set_value(TOSA_GPIO_BL_C20MA, brightness & 0x100); + + tosa_bl_enable(spi, brightness); +} + +static int tosa_bl_update_status(struct backlight_device *dev) +{ + struct backlight_properties *props = &dev->props; + struct tosa_bl_data *data = bl_get_data(dev); + int power = max(props->power, props->fb_blank); + int brightness = props->brightness; + + if (power) + brightness = 0; + + tosa_bl_set_backlight(data, brightness); + + return 0; +} + +static int tosa_bl_get_brightness(struct backlight_device *dev) +{ + struct backlight_properties *props = &dev->props; + + return props->brightness; +} + +static const struct backlight_ops bl_ops = { + .get_brightness = tosa_bl_get_brightness, + .update_status = tosa_bl_update_status, +}; + +static int tosa_bl_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct backlight_properties props; + struct tosa_bl_data *data; + int ret = 0; + + data = devm_kzalloc(&client->dev, sizeof(struct tosa_bl_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->comadj = sharpsl_param.comadj == -1 ? COMADJ_DEFAULT : sharpsl_param.comadj; + + ret = devm_gpio_request_one(&client->dev, TOSA_GPIO_BL_C20MA, + GPIOF_OUT_INIT_LOW, "backlight"); + if (ret) { + dev_dbg(&data->bl->dev, "Unable to request gpio!\n"); + return ret; + } + + i2c_set_clientdata(client, data); + data->i2c = client; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = 512 - 1; + data->bl = devm_backlight_device_register(&client->dev, "tosa-bl", + &client->dev, data, &bl_ops, + &props); + if (IS_ERR(data->bl)) { + ret = PTR_ERR(data->bl); + goto err_reg; + } + + data->bl->props.brightness = 69; + data->bl->props.power = FB_BLANK_UNBLANK; + + backlight_update_status(data->bl); + + return 0; + +err_reg: + data->bl = NULL; + return ret; +} + +static int tosa_bl_remove(struct i2c_client *client) +{ + struct tosa_bl_data *data = i2c_get_clientdata(client); + + data->bl = NULL; + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tosa_bl_suspend(struct device *dev) +{ + struct tosa_bl_data *data = dev_get_drvdata(dev); + + tosa_bl_set_backlight(data, 0); + + return 0; +} + +static int tosa_bl_resume(struct device *dev) +{ + struct tosa_bl_data *data = dev_get_drvdata(dev); + + backlight_update_status(data->bl); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(tosa_bl_pm_ops, tosa_bl_suspend, tosa_bl_resume); + +static const struct i2c_device_id tosa_bl_id[] = { + { "tosa-bl", 0 }, + { }, +}; + +static struct i2c_driver tosa_bl_driver = { + .driver = { + .name = "tosa-bl", + .owner = THIS_MODULE, + .pm = &tosa_bl_pm_ops, + }, + .probe = tosa_bl_probe, + .remove = tosa_bl_remove, + .id_table = tosa_bl_id, +}; + +module_i2c_driver(tosa_bl_driver); + +MODULE_AUTHOR("Dmitry Baryshkov"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA"); + diff --git a/drivers/video/backlight/tosa_lcd.c b/drivers/video/backlight/tosa_lcd.c new file mode 100644 index 00000000000..f08d641ccd0 --- /dev/null +++ b/drivers/video/backlight/tosa_lcd.c @@ -0,0 +1,278 @@ +/* + * LCD / Backlight control code for Sharp SL-6000x (tosa) + * + * Copyright (c) 2005 Dirk Opfer + * Copyright (c) 2007,2008 Dmitry Baryshkov + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/spi/spi.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/lcd.h> +#include <linux/fb.h> + +#include <asm/mach/sharpsl_param.h> + +#include <mach/tosa.h> + +#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) + +#define TG_REG0_VQV 0x0001 +#define TG_REG0_COLOR 0x0002 +#define TG_REG0_UD 0x0004 +#define TG_REG0_LR 0x0008 + +#define DAC_BASE 0x4e + +struct tosa_lcd_data { + struct spi_device *spi; + struct lcd_device *lcd; + struct i2c_client *i2c; + + int lcd_power; + bool is_vga; +}; + +static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data) +{ + u8 buf[1]; + struct spi_message msg; + struct spi_transfer xfer = { + .len = 1, + .cs_change = 1, + .tx_buf = buf, + }; + + buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f); + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + return spi_sync(spi, &msg); +} + +int tosa_bl_enable(struct spi_device *spi, int enable) +{ + /* bl_enable GP04=1 otherwise GP04=0*/ + return tosa_tg_send(spi, TG_GPODR2, enable ? 0x01 : 0x00); +} +EXPORT_SYMBOL(tosa_bl_enable); + +static void tosa_lcd_tg_init(struct tosa_lcd_data *data) +{ + /* TG on */ + gpio_set_value(TOSA_GPIO_TG_ON, 0); + + mdelay(60); + + /* delayed 0clk TCTL signal for VGA */ + tosa_tg_send(data->spi, TG_TPOSCTL, 0x00); + /* GPOS0=powercontrol, GPOS1=GPIO, GPOS2=TCTL */ + tosa_tg_send(data->spi, TG_GPOSR, 0x02); +} + +static void tosa_lcd_tg_on(struct tosa_lcd_data *data) +{ + struct spi_device *spi = data->spi; + int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR; + + if (data->is_vga) + value |= TG_REG0_VQV; + + tosa_tg_send(spi, TG_PNLCTL, value); + + /* TG LCD pannel power up */ + tosa_tg_send(spi, TG_PINICTL, 0x4); + mdelay(50); + + /* TG LCD GVSS */ + tosa_tg_send(spi, TG_PINICTL, 0x0); + + if (!data->i2c) { + /* + * after the pannel is powered up the first time, + * we can access the i2c bus so probe for the DAC + */ + struct i2c_adapter *adap = i2c_get_adapter(0); + struct i2c_board_info info = { + .type = "tosa-bl", + .addr = DAC_BASE, + .platform_data = data->spi, + }; + data->i2c = i2c_new_device(adap, &info); + } +} + +static void tosa_lcd_tg_off(struct tosa_lcd_data *data) +{ + struct spi_device *spi = data->spi; + + /* TG LCD VHSA off */ + tosa_tg_send(spi, TG_PINICTL, 0x4); + mdelay(50); + + /* TG LCD signal off */ + tosa_tg_send(spi, TG_PINICTL, 0x6); + mdelay(50); + + /* TG Off */ + gpio_set_value(TOSA_GPIO_TG_ON, 1); + mdelay(100); +} + +int tosa_lcd_set_power(struct lcd_device *lcd, int power) +{ + struct tosa_lcd_data *data = lcd_get_data(lcd); + + if (POWER_IS_ON(power) && !POWER_IS_ON(data->lcd_power)) + tosa_lcd_tg_on(data); + + if (!POWER_IS_ON(power) && POWER_IS_ON(data->lcd_power)) + tosa_lcd_tg_off(data); + + data->lcd_power = power; + return 0; +} + +static int tosa_lcd_get_power(struct lcd_device *lcd) +{ + struct tosa_lcd_data *data = lcd_get_data(lcd); + + return data->lcd_power; +} + +static int tosa_lcd_set_mode(struct lcd_device *lcd, struct fb_videomode *mode) +{ + struct tosa_lcd_data *data = lcd_get_data(lcd); + + if (mode->xres == 320 || mode->yres == 320) + data->is_vga = false; + else + data->is_vga = true; + + if (POWER_IS_ON(data->lcd_power)) + tosa_lcd_tg_on(data); + + return 0; +} + +static struct lcd_ops tosa_lcd_ops = { + .set_power = tosa_lcd_set_power, + .get_power = tosa_lcd_get_power, + .set_mode = tosa_lcd_set_mode, +}; + +static int tosa_lcd_probe(struct spi_device *spi) +{ + int ret; + struct tosa_lcd_data *data; + + data = devm_kzalloc(&spi->dev, sizeof(struct tosa_lcd_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->is_vga = true; /* default to VGA mode */ + + /* + * bits_per_word cannot be configured in platform data + */ + spi->bits_per_word = 8; + + ret = spi_setup(spi); + if (ret < 0) + return ret; + + data->spi = spi; + spi_set_drvdata(spi, data); + + ret = devm_gpio_request_one(&spi->dev, TOSA_GPIO_TG_ON, + GPIOF_OUT_INIT_LOW, "tg #pwr"); + if (ret < 0) + return ret; + + mdelay(60); + + tosa_lcd_tg_init(data); + + tosa_lcd_tg_on(data); + + data->lcd = devm_lcd_device_register(&spi->dev, "tosa-lcd", &spi->dev, + data, &tosa_lcd_ops); + + if (IS_ERR(data->lcd)) { + ret = PTR_ERR(data->lcd); + data->lcd = NULL; + goto err_register; + } + + return 0; + +err_register: + tosa_lcd_tg_off(data); + return ret; +} + +static int tosa_lcd_remove(struct spi_device *spi) +{ + struct tosa_lcd_data *data = spi_get_drvdata(spi); + + if (data->i2c) + i2c_unregister_device(data->i2c); + + tosa_lcd_tg_off(data); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tosa_lcd_suspend(struct device *dev) +{ + struct tosa_lcd_data *data = dev_get_drvdata(dev); + + tosa_lcd_tg_off(data); + + return 0; +} + +static int tosa_lcd_resume(struct device *dev) +{ + struct tosa_lcd_data *data = dev_get_drvdata(dev); + + tosa_lcd_tg_init(data); + if (POWER_IS_ON(data->lcd_power)) + tosa_lcd_tg_on(data); + else + tosa_lcd_tg_off(data); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(tosa_lcd_pm_ops, tosa_lcd_suspend, tosa_lcd_resume); + +static struct spi_driver tosa_lcd_driver = { + .driver = { + .name = "tosa-lcd", + .owner = THIS_MODULE, + .pm = &tosa_lcd_pm_ops, + }, + .probe = tosa_lcd_probe, + .remove = tosa_lcd_remove, +}; + +module_spi_driver(tosa_lcd_driver); + +MODULE_AUTHOR("Dmitry Baryshkov"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA"); +MODULE_ALIAS("spi:tosa-lcd"); diff --git a/drivers/video/backlight/tps65217_bl.c b/drivers/video/backlight/tps65217_bl.c new file mode 100644 index 00000000000..595dcf56102 --- /dev/null +++ b/drivers/video/backlight/tps65217_bl.c @@ -0,0 +1,341 @@ +/* + * tps65217_bl.c + * + * TPS65217 backlight driver + * + * Copyright (C) 2012 Matthias Kaehlcke + * Author: Matthias Kaehlcke <matthias@kaehlcke.net> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/mfd/tps65217.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +struct tps65217_bl { + struct tps65217 *tps; + struct device *dev; + struct backlight_device *bl; + bool is_enabled; +}; + +static int tps65217_bl_enable(struct tps65217_bl *tps65217_bl) +{ + int rc; + + rc = tps65217_set_bits(tps65217_bl->tps, TPS65217_REG_WLEDCTRL1, + TPS65217_WLEDCTRL1_ISINK_ENABLE, + TPS65217_WLEDCTRL1_ISINK_ENABLE, TPS65217_PROTECT_NONE); + if (rc) { + dev_err(tps65217_bl->dev, + "failed to enable backlight: %d\n", rc); + return rc; + } + + tps65217_bl->is_enabled = true; + + dev_dbg(tps65217_bl->dev, "backlight enabled\n"); + + return 0; +} + +static int tps65217_bl_disable(struct tps65217_bl *tps65217_bl) +{ + int rc; + + rc = tps65217_clear_bits(tps65217_bl->tps, + TPS65217_REG_WLEDCTRL1, + TPS65217_WLEDCTRL1_ISINK_ENABLE, + TPS65217_PROTECT_NONE); + if (rc) { + dev_err(tps65217_bl->dev, + "failed to disable backlight: %d\n", rc); + return rc; + } + + tps65217_bl->is_enabled = false; + + dev_dbg(tps65217_bl->dev, "backlight disabled\n"); + + return 0; +} + +static int tps65217_bl_update_status(struct backlight_device *bl) +{ + struct tps65217_bl *tps65217_bl = bl_get_data(bl); + int rc; + int brightness = bl->props.brightness; + + if (bl->props.state & BL_CORE_SUSPENDED) + brightness = 0; + + if ((bl->props.power != FB_BLANK_UNBLANK) || + (bl->props.fb_blank != FB_BLANK_UNBLANK)) + /* framebuffer in low power mode or blanking active */ + brightness = 0; + + if (brightness > 0) { + rc = tps65217_reg_write(tps65217_bl->tps, + TPS65217_REG_WLEDCTRL2, + brightness - 1, + TPS65217_PROTECT_NONE); + if (rc) { + dev_err(tps65217_bl->dev, + "failed to set brightness level: %d\n", rc); + return rc; + } + + dev_dbg(tps65217_bl->dev, "brightness set to %d\n", brightness); + + if (!tps65217_bl->is_enabled) + rc = tps65217_bl_enable(tps65217_bl); + } else { + rc = tps65217_bl_disable(tps65217_bl); + } + + return rc; +} + +static int tps65217_bl_get_brightness(struct backlight_device *bl) +{ + return bl->props.brightness; +} + +static const struct backlight_ops tps65217_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = tps65217_bl_update_status, + .get_brightness = tps65217_bl_get_brightness +}; + +static int tps65217_bl_hw_init(struct tps65217_bl *tps65217_bl, + struct tps65217_bl_pdata *pdata) +{ + int rc; + + rc = tps65217_bl_disable(tps65217_bl); + if (rc) + return rc; + + switch (pdata->isel) { + case TPS65217_BL_ISET1: + /* select ISET_1 current level */ + rc = tps65217_clear_bits(tps65217_bl->tps, + TPS65217_REG_WLEDCTRL1, + TPS65217_WLEDCTRL1_ISEL, + TPS65217_PROTECT_NONE); + if (rc) { + dev_err(tps65217_bl->dev, + "failed to select ISET1 current level: %d)\n", + rc); + return rc; + } + + dev_dbg(tps65217_bl->dev, "selected ISET1 current level\n"); + + break; + + case TPS65217_BL_ISET2: + /* select ISET2 current level */ + rc = tps65217_set_bits(tps65217_bl->tps, TPS65217_REG_WLEDCTRL1, + TPS65217_WLEDCTRL1_ISEL, + TPS65217_WLEDCTRL1_ISEL, TPS65217_PROTECT_NONE); + if (rc) { + dev_err(tps65217_bl->dev, + "failed to select ISET2 current level: %d\n", + rc); + return rc; + } + + dev_dbg(tps65217_bl->dev, "selected ISET2 current level\n"); + + break; + + default: + dev_err(tps65217_bl->dev, + "invalid value for current level: %d\n", pdata->isel); + return -EINVAL; + } + + /* set PWM frequency */ + rc = tps65217_set_bits(tps65217_bl->tps, + TPS65217_REG_WLEDCTRL1, + TPS65217_WLEDCTRL1_FDIM_MASK, + pdata->fdim, + TPS65217_PROTECT_NONE); + if (rc) { + dev_err(tps65217_bl->dev, + "failed to select PWM dimming frequency: %d\n", + rc); + return rc; + } + + return 0; +} + +#ifdef CONFIG_OF +static struct tps65217_bl_pdata * +tps65217_bl_parse_dt(struct platform_device *pdev) +{ + struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); + struct device_node *node = of_node_get(tps->dev->of_node); + struct tps65217_bl_pdata *pdata, *err; + u32 val; + + node = of_find_node_by_name(node, "backlight"); + if (!node) + return ERR_PTR(-ENODEV); + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + err = ERR_PTR(-ENOMEM); + goto err; + } + + pdata->isel = TPS65217_BL_ISET1; + if (!of_property_read_u32(node, "isel", &val)) { + if (val < TPS65217_BL_ISET1 || + val > TPS65217_BL_ISET2) { + dev_err(&pdev->dev, + "invalid 'isel' value in the device tree\n"); + err = ERR_PTR(-EINVAL); + goto err; + } + + pdata->isel = val; + } + + pdata->fdim = TPS65217_BL_FDIM_200HZ; + if (!of_property_read_u32(node, "fdim", &val)) { + switch (val) { + case 100: + pdata->fdim = TPS65217_BL_FDIM_100HZ; + break; + + case 200: + pdata->fdim = TPS65217_BL_FDIM_200HZ; + break; + + case 500: + pdata->fdim = TPS65217_BL_FDIM_500HZ; + break; + + case 1000: + pdata->fdim = TPS65217_BL_FDIM_1000HZ; + break; + + default: + dev_err(&pdev->dev, + "invalid 'fdim' value in the device tree\n"); + err = ERR_PTR(-EINVAL); + goto err; + } + } + + if (!of_property_read_u32(node, "default-brightness", &val)) { + if (val < 0 || + val > 100) { + dev_err(&pdev->dev, + "invalid 'default-brightness' value in the device tree\n"); + err = ERR_PTR(-EINVAL); + goto err; + } + + pdata->dft_brightness = val; + } + + of_node_put(node); + + return pdata; + +err: + of_node_put(node); + + return err; +} +#else +static struct tps65217_bl_pdata * +tps65217_bl_parse_dt(struct platform_device *pdev) +{ + return NULL; +} +#endif + +static int tps65217_bl_probe(struct platform_device *pdev) +{ + int rc; + struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); + struct tps65217_bl *tps65217_bl; + struct tps65217_bl_pdata *pdata; + struct backlight_properties bl_props; + + if (tps->dev->of_node) { + pdata = tps65217_bl_parse_dt(pdev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } else { + pdata = dev_get_platdata(&pdev->dev); + if (!pdata) { + dev_err(&pdev->dev, "no platform data provided\n"); + return -EINVAL; + } + } + + tps65217_bl = devm_kzalloc(&pdev->dev, sizeof(*tps65217_bl), + GFP_KERNEL); + if (tps65217_bl == NULL) + return -ENOMEM; + + tps65217_bl->tps = tps; + tps65217_bl->dev = &pdev->dev; + tps65217_bl->is_enabled = false; + + rc = tps65217_bl_hw_init(tps65217_bl, pdata); + if (rc) + return rc; + + memset(&bl_props, 0, sizeof(struct backlight_properties)); + bl_props.type = BACKLIGHT_RAW; + bl_props.max_brightness = 100; + + tps65217_bl->bl = devm_backlight_device_register(&pdev->dev, pdev->name, + tps65217_bl->dev, tps65217_bl, + &tps65217_bl_ops, &bl_props); + if (IS_ERR(tps65217_bl->bl)) { + dev_err(tps65217_bl->dev, + "registration of backlight device failed: %d\n", rc); + return PTR_ERR(tps65217_bl->bl); + } + + tps65217_bl->bl->props.brightness = pdata->dft_brightness; + backlight_update_status(tps65217_bl->bl); + platform_set_drvdata(pdev, tps65217_bl); + + return 0; +} + +static struct platform_driver tps65217_bl_driver = { + .probe = tps65217_bl_probe, + .driver = { + .owner = THIS_MODULE, + .name = "tps65217-bl", + }, +}; + +module_platform_driver(tps65217_bl_driver); + +MODULE_DESCRIPTION("TPS65217 Backlight driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Matthias Kaehlcke <matthias@kaehlcke.net>"); diff --git a/drivers/video/backlight/vgg2432a4.c b/drivers/video/backlight/vgg2432a4.c index 593c7687d54..d538947a67d 100644 --- a/drivers/video/backlight/vgg2432a4.c +++ b/drivers/video/backlight/vgg2432a4.c @@ -26,7 +26,7 @@ /* Device initialisation sequences */ -static struct ili9320_reg vgg_init1[] = { +static const struct ili9320_reg vgg_init1[] = { { .address = ILI9320_POWER1, .value = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0), @@ -43,7 +43,7 @@ static struct ili9320_reg vgg_init1[] = { }, }; -static struct ili9320_reg vgg_init2[] = { +static const struct ili9320_reg vgg_init2[] = { { .address = ILI9320_POWER1, .value = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE | @@ -54,7 +54,7 @@ static struct ili9320_reg vgg_init2[] = { } }; -static struct ili9320_reg vgg_gamma[] = { +static const struct ili9320_reg vgg_gamma[] = { { .address = ILI9320_GAMMA1, .value = 0x0000, @@ -89,7 +89,7 @@ static struct ili9320_reg vgg_gamma[] = { }; -static struct ili9320_reg vgg_init0[] = { +static const struct ili9320_reg vgg_init0[] = { [0] = { /* set direction and scan mode gate */ .address = ILI9320_DRIVER, @@ -137,7 +137,7 @@ static int vgg2432a4_lcd_init(struct ili9320 *lcd, ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1); ili9320_write(lcd, ILI9320_FRAMEMAKER, 0x0); - ili9320_write(lcd, ILI9320_RGB_IF2, ILI9320_RGBIF2_DPL); + ili9320_write(lcd, ILI9320_RGB_IF2, cfg->rgb_if2); ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1)); if (ret != 0) @@ -205,19 +205,15 @@ static int vgg2432a4_lcd_init(struct ili9320 *lcd, return ret; } -#ifdef CONFIG_PM -static int vgg2432a4_suspend(struct spi_device *spi, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int vgg2432a4_suspend(struct device *dev) { - return ili9320_suspend(dev_get_drvdata(&spi->dev), state); + return ili9320_suspend(dev_get_drvdata(dev)); } - -static int vgg2432a4_resume(struct spi_device *spi) +static int vgg2432a4_resume(struct device *dev) { - return ili9320_resume(dev_get_drvdata(&spi->dev)); + return ili9320_resume(dev_get_drvdata(dev)); } -#else -#define vgg2432a4_suspend NULL -#define vgg2432a4_resume NULL #endif static struct ili9320_client vgg2432a4_client = { @@ -227,7 +223,7 @@ static struct ili9320_client vgg2432a4_client = { /* Device probe */ -static int __devinit vgg2432a4_probe(struct spi_device *spi) +static int vgg2432a4_probe(struct spi_device *spi) { int ret; @@ -240,45 +236,32 @@ static int __devinit vgg2432a4_probe(struct spi_device *spi) return 0; } -static int __devexit vgg2432a4_remove(struct spi_device *spi) +static int vgg2432a4_remove(struct spi_device *spi) { - return ili9320_remove(dev_get_drvdata(&spi->dev)); + return ili9320_remove(spi_get_drvdata(spi)); } static void vgg2432a4_shutdown(struct spi_device *spi) { - ili9320_shutdown(dev_get_drvdata(&spi->dev)); + ili9320_shutdown(spi_get_drvdata(spi)); } +static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume); + static struct spi_driver vgg2432a4_driver = { .driver = { .name = "VGG2432A4", .owner = THIS_MODULE, + .pm = &vgg2432a4_pm_ops, }, .probe = vgg2432a4_probe, - .remove = __devexit_p(vgg2432a4_remove), + .remove = vgg2432a4_remove, .shutdown = vgg2432a4_shutdown, - .suspend = vgg2432a4_suspend, - .resume = vgg2432a4_resume, }; -/* Device driver initialisation */ - -static int __init vgg2432a4_init(void) -{ - return spi_register_driver(&vgg2432a4_driver); -} - -static void __exit vgg2432a4_exit(void) -{ - spi_unregister_driver(&vgg2432a4_driver); -} - -module_init(vgg2432a4_init); -module_exit(vgg2432a4_exit); +module_spi_driver(vgg2432a4_driver); MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>"); MODULE_DESCRIPTION("VGG2432A4 LCD Driver"); MODULE_LICENSE("GPL v2"); - - +MODULE_ALIAS("spi:VGG2432A4"); diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c new file mode 100644 index 00000000000..8b9455e9306 --- /dev/null +++ b/drivers/video/backlight/wm831x_bl.c @@ -0,0 +1,230 @@ +/* + * Backlight driver for Wolfson Microelectronics WM831x PMICs + * + * Copyright 2009 Wolfson Microelectonics plc + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/slab.h> + +#include <linux/mfd/wm831x/core.h> +#include <linux/mfd/wm831x/pdata.h> +#include <linux/mfd/wm831x/regulator.h> + +struct wm831x_backlight_data { + struct wm831x *wm831x; + int isink_reg; + int current_brightness; +}; + +static int wm831x_backlight_set(struct backlight_device *bl, int brightness) +{ + struct wm831x_backlight_data *data = bl_get_data(bl); + struct wm831x *wm831x = data->wm831x; + int power_up = !data->current_brightness && brightness; + int power_down = data->current_brightness && !brightness; + int ret; + + if (power_up) { + /* Enable the ISINK */ + ret = wm831x_set_bits(wm831x, data->isink_reg, + WM831X_CS1_ENA, WM831X_CS1_ENA); + if (ret < 0) + goto err; + + /* Enable the DC-DC */ + ret = wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, + WM831X_DC4_ENA, WM831X_DC4_ENA); + if (ret < 0) + goto err; + } + + if (power_down) { + /* DCDC first */ + ret = wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, + WM831X_DC4_ENA, 0); + if (ret < 0) + goto err; + + /* ISINK */ + ret = wm831x_set_bits(wm831x, data->isink_reg, + WM831X_CS1_DRIVE | WM831X_CS1_ENA, 0); + if (ret < 0) + goto err; + } + + /* Set the new brightness */ + ret = wm831x_set_bits(wm831x, data->isink_reg, + WM831X_CS1_ISEL_MASK, brightness); + if (ret < 0) + goto err; + + if (power_up) { + /* Drive current through the ISINK */ + ret = wm831x_set_bits(wm831x, data->isink_reg, + WM831X_CS1_DRIVE, WM831X_CS1_DRIVE); + if (ret < 0) + return ret; + } + + data->current_brightness = brightness; + + return 0; + +err: + /* If we were in the middle of a power transition always shut down + * for safety. + */ + if (power_up || power_down) { + wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0); + wm831x_set_bits(wm831x, data->isink_reg, WM831X_CS1_ENA, 0); + } + + return ret; +} + +static int wm831x_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.state & BL_CORE_SUSPENDED) + brightness = 0; + + return wm831x_backlight_set(bl, brightness); +} + +static int wm831x_backlight_get_brightness(struct backlight_device *bl) +{ + struct wm831x_backlight_data *data = bl_get_data(bl); + return data->current_brightness; +} + +static const struct backlight_ops wm831x_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = wm831x_backlight_update_status, + .get_brightness = wm831x_backlight_get_brightness, +}; + +static int wm831x_backlight_probe(struct platform_device *pdev) +{ + struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); + struct wm831x_pdata *wm831x_pdata = dev_get_platdata(pdev->dev.parent); + struct wm831x_backlight_pdata *pdata; + struct wm831x_backlight_data *data; + struct backlight_device *bl; + struct backlight_properties props; + int ret, i, max_isel, isink_reg, dcdc_cfg; + + /* We need platform data */ + if (wm831x_pdata) + pdata = wm831x_pdata->backlight; + else + pdata = NULL; + + if (!pdata) { + dev_err(&pdev->dev, "No platform data supplied\n"); + return -EINVAL; + } + + /* Figure out the maximum current we can use */ + for (i = 0; i < WM831X_ISINK_MAX_ISEL; i++) { + if (wm831x_isinkv_values[i] > pdata->max_uA) + break; + } + + if (i == 0) { + dev_err(&pdev->dev, "Invalid max_uA: %duA\n", pdata->max_uA); + return -EINVAL; + } + max_isel = i - 1; + + if (pdata->max_uA != wm831x_isinkv_values[max_isel]) + dev_warn(&pdev->dev, + "Maximum current is %duA not %duA as requested\n", + wm831x_isinkv_values[max_isel], pdata->max_uA); + + switch (pdata->isink) { + case 1: + isink_reg = WM831X_CURRENT_SINK_1; + dcdc_cfg = 0; + break; + case 2: + isink_reg = WM831X_CURRENT_SINK_2; + dcdc_cfg = WM831X_DC4_FBSRC; + break; + default: + dev_err(&pdev->dev, "Invalid ISINK %d\n", pdata->isink); + return -EINVAL; + } + + /* Configure the ISINK to use for feedback */ + ret = wm831x_reg_unlock(wm831x); + if (ret < 0) + return ret; + + ret = wm831x_set_bits(wm831x, WM831X_DC4_CONTROL, WM831X_DC4_FBSRC, + dcdc_cfg); + + wm831x_reg_lock(wm831x); + if (ret < 0) + return ret; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + data->wm831x = wm831x; + data->current_brightness = 0; + data->isink_reg = isink_reg; + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = max_isel; + bl = devm_backlight_device_register(&pdev->dev, "wm831x", &pdev->dev, + data, &wm831x_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.brightness = max_isel; + + platform_set_drvdata(pdev, bl); + + /* Disable the DCDC if it was started so we can bootstrap */ + wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0); + + backlight_update_status(bl); + + return 0; +} + +static struct platform_driver wm831x_backlight_driver = { + .driver = { + .name = "wm831x-backlight", + .owner = THIS_MODULE, + }, + .probe = wm831x_backlight_probe, +}; + +module_platform_driver(wm831x_backlight_driver); + +MODULE_DESCRIPTION("Backlight Driver for WM831x PMICs"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:wm831x-backlight"); 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