diff options
Diffstat (limited to 'arch/arm/mach-omap2/mmc-twl4030.c')
| -rw-r--r-- | arch/arm/mach-omap2/mmc-twl4030.c | 483 |
1 files changed, 0 insertions, 483 deletions
diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c deleted file mode 100644 index dc40b3e7220..00000000000 --- a/arch/arm/mach-omap2/mmc-twl4030.c +++ /dev/null @@ -1,483 +0,0 @@ -/* - * linux/arch/arm/mach-omap2/mmc-twl4030.c - * - * Copyright (C) 2007-2008 Texas Instruments - * Copyright (C) 2008 Nokia Corporation - * Author: 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/err.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/gpio.h> -#include <linux/i2c/twl4030.h> -#include <linux/regulator/machine.h> - -#include <mach/hardware.h> -#include <mach/control.h> -#include <mach/mmc.h> -#include <mach/board.h> - -#include "mmc-twl4030.h" - -#if defined(CONFIG_TWL4030_CORE) && \ - (defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)) - -#define LDO_CLR 0x00 -#define VSEL_S2_CLR 0x40 - -#define VMMC1_DEV_GRP 0x27 -#define VMMC1_CLR 0x00 -#define VMMC1_315V 0x03 -#define VMMC1_300V 0x02 -#define VMMC1_285V 0x01 -#define VMMC1_185V 0x00 -#define VMMC1_DEDICATED 0x2A - -#define VMMC2_DEV_GRP 0x2B -#define VMMC2_CLR 0x40 -#define VMMC2_315V 0x0c -#define VMMC2_300V 0x0b -#define VMMC2_285V 0x0a -#define VMMC2_280V 0x09 -#define VMMC2_260V 0x08 -#define VMMC2_185V 0x06 -#define VMMC2_DEDICATED 0x2E - -#define VMMC_DEV_GRP_P1 0x20 - -static u16 control_pbias_offset; -static u16 control_devconf1_offset; - -#define HSMMC_NAME_LEN 9 - -static struct twl_mmc_controller { - struct omap_mmc_platform_data *mmc; - u8 twl_vmmc_dev_grp; - u8 twl_mmc_dedicated; - char name[HSMMC_NAME_LEN + 1]; -} hsmmc[OMAP34XX_NR_MMC] = { - { - .twl_vmmc_dev_grp = VMMC1_DEV_GRP, - .twl_mmc_dedicated = VMMC1_DEDICATED, - }, - { - .twl_vmmc_dev_grp = VMMC2_DEV_GRP, - .twl_mmc_dedicated = VMMC2_DEDICATED, - }, -}; - -static int twl_mmc_card_detect(int irq) -{ - unsigned i; - - for (i = 0; i < ARRAY_SIZE(hsmmc); i++) { - struct omap_mmc_platform_data *mmc; - - mmc = hsmmc[i].mmc; - if (!mmc) - continue; - if (irq != mmc->slots[0].card_detect_irq) - continue; - - /* NOTE: assumes card detect signal is active-low */ - return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); - } - return -ENOSYS; -} - -static int twl_mmc_get_ro(struct device *dev, int slot) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - /* NOTE: assumes write protect signal is active-high */ - return gpio_get_value_cansleep(mmc->slots[0].gpio_wp); -} - -static int twl_mmc_get_cover_state(struct device *dev, int slot) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - /* NOTE: assumes card detect signal is active-low */ - return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); -} - -/* - * MMC Slot Initialization. - */ -static int twl_mmc_late_init(struct device *dev) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - int ret = 0; - int i; - - ret = gpio_request(mmc->slots[0].switch_pin, "mmc_cd"); - if (ret) - goto done; - ret = gpio_direction_input(mmc->slots[0].switch_pin); - if (ret) - goto err; - - for (i = 0; i < ARRAY_SIZE(hsmmc); i++) { - if (hsmmc[i].name == mmc->slots[0].name) { - hsmmc[i].mmc = mmc; - break; - } - } - - return 0; - -err: - gpio_free(mmc->slots[0].switch_pin); -done: - mmc->slots[0].card_detect_irq = 0; - mmc->slots[0].card_detect = NULL; - - dev_err(dev, "err %d configuring card detect\n", ret); - return ret; -} - -static void twl_mmc_cleanup(struct device *dev) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - gpio_free(mmc->slots[0].switch_pin); -} - -#ifdef CONFIG_PM - -static int twl_mmc_suspend(struct device *dev, int slot) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - disable_irq(mmc->slots[0].card_detect_irq); - return 0; -} - -static int twl_mmc_resume(struct device *dev, int slot) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - enable_irq(mmc->slots[0].card_detect_irq); - return 0; -} - -#else -#define twl_mmc_suspend NULL -#define twl_mmc_resume NULL -#endif - -/* - * Sets the MMC voltage in twl4030 - */ - -#define MMC1_OCR (MMC_VDD_165_195 \ - |MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31|MMC_VDD_31_32) -#define MMC2_OCR (MMC_VDD_165_195 \ - |MMC_VDD_25_26|MMC_VDD_26_27|MMC_VDD_27_28 \ - |MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31|MMC_VDD_31_32) - -static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd) -{ - int ret; - u8 vmmc = 0, dev_grp_val; - - if (!vdd) - goto doit; - - if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP) { - /* VMMC1: max 220 mA. And for 8-bit mode, - * VSIM: max 50 mA - */ - switch (1 << vdd) { - case MMC_VDD_165_195: - vmmc = VMMC1_185V; - /* and VSIM_180V */ - break; - case MMC_VDD_28_29: - vmmc = VMMC1_285V; - /* and VSIM_280V */ - break; - case MMC_VDD_29_30: - case MMC_VDD_30_31: - vmmc = VMMC1_300V; - /* and VSIM_300V */ - break; - case MMC_VDD_31_32: - vmmc = VMMC1_315V; - /* error if VSIM needed */ - break; - default: - return -EINVAL; - } - } else if (c->twl_vmmc_dev_grp == VMMC2_DEV_GRP) { - /* VMMC2: max 100 mA */ - switch (1 << vdd) { - case MMC_VDD_165_195: - vmmc = VMMC2_185V; - break; - case MMC_VDD_25_26: - case MMC_VDD_26_27: - vmmc = VMMC2_260V; - break; - case MMC_VDD_27_28: - vmmc = VMMC2_280V; - break; - case MMC_VDD_28_29: - vmmc = VMMC2_285V; - break; - case MMC_VDD_29_30: - case MMC_VDD_30_31: - vmmc = VMMC2_300V; - break; - case MMC_VDD_31_32: - vmmc = VMMC2_315V; - break; - default: - return -EINVAL; - } - } else { - return -EINVAL; - } - -doit: - if (vdd) - dev_grp_val = VMMC_DEV_GRP_P1; /* Power up */ - else - dev_grp_val = LDO_CLR; /* Power down */ - - ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, - dev_grp_val, c->twl_vmmc_dev_grp); - if (ret || !vdd) - return ret; - - ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, - vmmc, c->twl_mmc_dedicated); - - return ret; -} - -static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, - int vdd) -{ - u32 reg; - int ret = 0; - struct twl_mmc_controller *c = &hsmmc[0]; - struct omap_mmc_platform_data *mmc = dev->platform_data; - - /* - * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the - * card using the same TWL VMMC1 supply (hsmmc[0]); OMAP has both - * 1.8V and 3.0V modes, controlled by the PBIAS register. - * - * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which - * is most naturally TWL VSIM; those pins also use PBIAS. - */ - if (power_on) { - if (cpu_is_omap2430()) { - reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1); - if ((1 << vdd) >= MMC_VDD_30_31) - reg |= OMAP243X_MMC1_ACTIVE_OVERWRITE; - else - reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE; - omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1); - } - - if (mmc->slots[0].internal_clock) { - reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); - reg |= OMAP2_MMCSDIO1ADPCLKISEL; - omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0); - } - - reg = omap_ctrl_readl(control_pbias_offset); - reg |= OMAP2_PBIASSPEEDCTRL0; - reg &= ~OMAP2_PBIASLITEPWRDNZ0; - omap_ctrl_writel(reg, control_pbias_offset); - - ret = twl_mmc_set_voltage(c, vdd); - - /* 100ms delay required for PBIAS configuration */ - msleep(100); - reg = omap_ctrl_readl(control_pbias_offset); - reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0); - if ((1 << vdd) <= MMC_VDD_165_195) - reg &= ~OMAP2_PBIASLITEVMODE0; - else - reg |= OMAP2_PBIASLITEVMODE0; - omap_ctrl_writel(reg, control_pbias_offset); - } else { - reg = omap_ctrl_readl(control_pbias_offset); - reg &= ~OMAP2_PBIASLITEPWRDNZ0; - omap_ctrl_writel(reg, control_pbias_offset); - - ret = twl_mmc_set_voltage(c, 0); - - /* 100ms delay required for PBIAS configuration */ - msleep(100); - reg = omap_ctrl_readl(control_pbias_offset); - reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 | - OMAP2_PBIASLITEVMODE0); - omap_ctrl_writel(reg, control_pbias_offset); - } - - return ret; -} - -static int twl_mmc2_set_power(struct device *dev, int slot, int power_on, int vdd) -{ - int ret; - struct twl_mmc_controller *c = &hsmmc[1]; - struct omap_mmc_platform_data *mmc = dev->platform_data; - - /* - * Assume TWL VMMC2 (hsmmc[1]) is used only to power the card ... OMAP - * VDDS is used to power the pins, optionally with a transceiver to - * support cards using voltages other than VDDS (1.8V nominal). When a - * transceiver is used, DAT3..7 are muxed as transceiver control pins. - */ - if (power_on) { - if (mmc->slots[0].internal_clock) { - u32 reg; - - reg = omap_ctrl_readl(control_devconf1_offset); - reg |= OMAP2_MMCSDIO2ADPCLKISEL; - omap_ctrl_writel(reg, control_devconf1_offset); - } - ret = twl_mmc_set_voltage(c, vdd); - } else { - ret = twl_mmc_set_voltage(c, 0); - } - - return ret; -} - -static int twl_mmc3_set_power(struct device *dev, int slot, int power_on, - int vdd) -{ - /* - * Assume MMC3 has self-powered device connected, for example on-board - * chip with external power source. - */ - return 0; -} - -static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata; - -void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) -{ - struct twl4030_hsmmc_info *c; - int nr_hsmmc = ARRAY_SIZE(hsmmc_data); - - if (cpu_is_omap2430()) { - control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE; - control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1; - nr_hsmmc = 2; - } else { - control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE; - control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1; - } - - for (c = controllers; c->mmc; c++) { - struct twl_mmc_controller *twl = hsmmc + c->mmc - 1; - struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1]; - - if (!c->mmc || c->mmc > nr_hsmmc) { - pr_debug("MMC%d: no such controller\n", c->mmc); - continue; - } - if (mmc) { - pr_debug("MMC%d: already configured\n", c->mmc); - continue; - } - - mmc = kzalloc(sizeof(struct omap_mmc_platform_data), GFP_KERNEL); - if (!mmc) { - pr_err("Cannot allocate memory for mmc device!\n"); - return; - } - - if (c->name) - strncpy(twl->name, c->name, HSMMC_NAME_LEN); - else - snprintf(twl->name, ARRAY_SIZE(twl->name), - "mmc%islot%i", c->mmc, 1); - mmc->slots[0].name = twl->name; - mmc->nr_slots = 1; - mmc->slots[0].wires = c->wires; - mmc->slots[0].internal_clock = !c->ext_clock; - mmc->dma_mask = 0xffffffff; - - /* note: twl4030 card detect GPIOs normally switch VMMCx ... */ - if (gpio_is_valid(c->gpio_cd)) { - mmc->init = twl_mmc_late_init; - mmc->cleanup = twl_mmc_cleanup; - mmc->suspend = twl_mmc_suspend; - mmc->resume = twl_mmc_resume; - - mmc->slots[0].switch_pin = c->gpio_cd; - mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd); - if (c->cover_only) - mmc->slots[0].get_cover_state = twl_mmc_get_cover_state; - else - mmc->slots[0].card_detect = twl_mmc_card_detect; - } else - mmc->slots[0].switch_pin = -EINVAL; - - /* write protect normally uses an OMAP gpio */ - if (gpio_is_valid(c->gpio_wp)) { - gpio_request(c->gpio_wp, "mmc_wp"); - gpio_direction_input(c->gpio_wp); - - mmc->slots[0].gpio_wp = c->gpio_wp; - mmc->slots[0].get_ro = twl_mmc_get_ro; - } else - mmc->slots[0].gpio_wp = -EINVAL; - - /* NOTE: we assume OMAP's MMC1 and MMC2 use - * the TWL4030's VMMC1 and VMMC2, respectively; - * and that MMC3 device has it's own power source. - */ - - switch (c->mmc) { - case 1: - mmc->slots[0].set_power = twl_mmc1_set_power; - mmc->slots[0].ocr_mask = MMC1_OCR; - break; - case 2: - mmc->slots[0].set_power = twl_mmc2_set_power; - if (c->transceiver) - mmc->slots[0].ocr_mask = MMC2_OCR; - else - mmc->slots[0].ocr_mask = MMC_VDD_165_195; - break; - case 3: - mmc->slots[0].set_power = twl_mmc3_set_power; - mmc->slots[0].ocr_mask = MMC_VDD_165_195; - break; - default: - pr_err("MMC%d configuration not supported!\n", c->mmc); - kfree(mmc); - continue; - } - hsmmc_data[c->mmc - 1] = mmc; - } - - omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC); - - /* pass the device nodes back to board setup code */ - for (c = controllers; c->mmc; c++) { - struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1]; - - if (!c->mmc || c->mmc > nr_hsmmc) - continue; - c->dev = mmc->dev; - } -} - -#endif |