diff options
Diffstat (limited to 'arch/arm/mach-imx/mach-mx51_efikamx.c')
| -rw-r--r-- | arch/arm/mach-imx/mach-mx51_efikamx.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mach-mx51_efikamx.c b/arch/arm/mach-imx/mach-mx51_efikamx.c new file mode 100644 index 00000000000..a9e48662cf7 --- /dev/null +++ b/arch/arm/mach-imx/mach-mx51_efikamx.c @@ -0,0 +1,295 @@ +/* + * Copyright (C) 2010 Linaro Limited + * + * based on code from the following + * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2009-2010 Pegatron Corporation. All Rights Reserved. + * Copyright 2009-2010 Genesi USA, Inc. All Rights Reserved. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/leds.h> +#include <linux/input.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/spi/flash.h> +#include <linux/spi/spi.h> +#include <linux/mfd/mc13892.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/consumer.h> + +#include <mach/common.h> +#include <mach/hardware.h> +#include <mach/iomux-mx51.h> + +#include <asm/setup.h> +#include <asm/mach-types.h> +#include <asm/mach/arch.h> +#include <asm/mach/time.h> + +#include "devices-imx51.h" +#include "efika.h" + +#define EFIKAMX_PCBID0 IMX_GPIO_NR(3, 16) +#define EFIKAMX_PCBID1 IMX_GPIO_NR(3, 17) +#define EFIKAMX_PCBID2 IMX_GPIO_NR(3, 11) + +#define EFIKAMX_BLUE_LED IMX_GPIO_NR(3, 13) +#define EFIKAMX_GREEN_LED IMX_GPIO_NR(3, 14) +#define EFIKAMX_RED_LED IMX_GPIO_NR(3, 15) + +#define EFIKAMX_POWER_KEY IMX_GPIO_NR(2, 31) + +/* board 1.1 doesn't have same reset gpio */ +#define EFIKAMX_RESET1_1 IMX_GPIO_NR(3, 2) +#define EFIKAMX_RESET IMX_GPIO_NR(1, 4) + +#define EFIKAMX_POWEROFF IMX_GPIO_NR(4, 13) + +#define EFIKAMX_PMIC IMX_GPIO_NR(1, 6) + +/* the pci ids pin have pull up. they're driven low according to board id */ +#define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0, 0, PAD_CTL_PUS_100K_UP) +#define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0, 0, PAD_CTL_PUS_100K_UP) +#define MX51_PAD_PCBID2 IOMUX_PAD(0x504, 0x128, 3, 0x0, 0, PAD_CTL_PUS_100K_UP) +#define MX51_PAD_PWRKEY IOMUX_PAD(0x48c, 0x0f8, 1, 0x0, 0, PAD_CTL_PUS_100K_UP | PAD_CTL_PKE) + +static iomux_v3_cfg_t mx51efikamx_pads[] = { + /* board id */ + MX51_PAD_PCBID0, + MX51_PAD_PCBID1, + MX51_PAD_PCBID2, + + /* leds */ + MX51_PAD_CSI1_D9__GPIO3_13, + MX51_PAD_CSI1_VSYNC__GPIO3_14, + MX51_PAD_CSI1_HSYNC__GPIO3_15, + + /* power key */ + MX51_PAD_PWRKEY, + + /* reset */ + MX51_PAD_DI1_PIN13__GPIO3_2, + MX51_PAD_GPIO1_4__GPIO1_4, + + /* power off */ + MX51_PAD_CSI2_VSYNC__GPIO4_13, +}; + +/* PCBID2 PCBID1 PCBID0 STATE + 1 1 1 ER1:rev1.1 + 1 1 0 ER2:rev1.2 + 1 0 1 ER3:rev1.3 + 1 0 0 ER4:rev1.4 +*/ +static void __init mx51_efikamx_board_id(void) +{ + int id; + + /* things are taking time to settle */ + msleep(150); + + gpio_request(EFIKAMX_PCBID0, "pcbid0"); + gpio_direction_input(EFIKAMX_PCBID0); + gpio_request(EFIKAMX_PCBID1, "pcbid1"); + gpio_direction_input(EFIKAMX_PCBID1); + gpio_request(EFIKAMX_PCBID2, "pcbid2"); + gpio_direction_input(EFIKAMX_PCBID2); + + id = gpio_get_value(EFIKAMX_PCBID0) ? 1 : 0; + id |= (gpio_get_value(EFIKAMX_PCBID1) ? 1 : 0) << 1; + id |= (gpio_get_value(EFIKAMX_PCBID2) ? 1 : 0) << 2; + + switch (id) { + case 7: + system_rev = 0x11; + break; + case 6: + system_rev = 0x12; + break; + case 5: + system_rev = 0x13; + break; + case 4: + system_rev = 0x14; + break; + default: + system_rev = 0x10; + break; + } + + if ((system_rev == 0x10) + || (system_rev == 0x12) + || (system_rev == 0x14)) { + printk(KERN_WARNING + "EfikaMX: Unsupported board revision 1.%u!\n", + system_rev & 0xf); + } +} + +static struct gpio_led mx51_efikamx_leds[] __initdata = { + { + .name = "efikamx:green", + .default_trigger = "default-on", + .gpio = EFIKAMX_GREEN_LED, + }, + { + .name = "efikamx:red", + .default_trigger = "ide-disk", + .gpio = EFIKAMX_RED_LED, + }, + { + .name = "efikamx:blue", + .default_trigger = "mmc0", + .gpio = EFIKAMX_BLUE_LED, + }, +}; + +static const struct gpio_led_platform_data + mx51_efikamx_leds_data __initconst = { + .leds = mx51_efikamx_leds, + .num_leds = ARRAY_SIZE(mx51_efikamx_leds), +}; + +static struct esdhc_platform_data sd_pdata = { + .cd_type = ESDHC_CD_CONTROLLER, + .wp_type = ESDHC_WP_CONTROLLER, +}; + +static struct gpio_keys_button mx51_efikamx_powerkey[] = { + { + .code = KEY_POWER, + .gpio = EFIKAMX_POWER_KEY, + .type = EV_PWR, + .desc = "Power Button (CM)", + .wakeup = 1, + .debounce_interval = 10, /* ms */ + }, +}; + +static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = { + .buttons = mx51_efikamx_powerkey, + .nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey), +}; + +void mx51_efikamx_reset(void) +{ + if (system_rev == 0x11) + gpio_direction_output(EFIKAMX_RESET1_1, 0); + else + gpio_direction_output(EFIKAMX_RESET, 0); +} + +static struct regulator *pwgt1, *pwgt2, *coincell; + +static void mx51_efikamx_power_off(void) +{ + if (!IS_ERR(coincell)) + regulator_disable(coincell); + + if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) { + regulator_disable(pwgt2); + regulator_disable(pwgt1); + } + gpio_direction_output(EFIKAMX_POWEROFF, 1); +} + +static int __init mx51_efikamx_power_init(void) +{ + if (machine_is_mx51_efikamx()) { + pwgt1 = regulator_get(NULL, "pwgt1"); + pwgt2 = regulator_get(NULL, "pwgt2"); + if (!IS_ERR(pwgt1) && !IS_ERR(pwgt2)) { + regulator_enable(pwgt1); + regulator_enable(pwgt2); + } + gpio_request(EFIKAMX_POWEROFF, "poweroff"); + pm_power_off = mx51_efikamx_power_off; + + /* enable coincell charger. maybe need a small power driver ? */ + coincell = regulator_get(NULL, "coincell"); + if (!IS_ERR(coincell)) { + regulator_set_voltage(coincell, 3000000, 3000000); + regulator_enable(coincell); + } + + regulator_has_full_constraints(); + } + + return 0; +} +late_initcall(mx51_efikamx_power_init); + +static void __init mx51_efikamx_init(void) +{ + imx51_soc_init(); + + mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads, + ARRAY_SIZE(mx51efikamx_pads)); + efika_board_common_init(); + + mx51_efikamx_board_id(); + + /* on < 1.2 boards both SD controllers are used */ + if (system_rev < 0x12) { + imx51_add_sdhci_esdhc_imx(0, NULL); + imx51_add_sdhci_esdhc_imx(1, &sd_pdata); + mx51_efikamx_leds[2].default_trigger = "mmc1"; + } else + imx51_add_sdhci_esdhc_imx(0, &sd_pdata); + + gpio_led_register_device(-1, &mx51_efikamx_leds_data); + imx_add_gpio_keys(&mx51_efikamx_powerkey_data); + + if (system_rev == 0x11) { + gpio_request(EFIKAMX_RESET1_1, "reset"); + gpio_direction_output(EFIKAMX_RESET1_1, 1); + } else { + gpio_request(EFIKAMX_RESET, "reset"); + gpio_direction_output(EFIKAMX_RESET, 1); + } + + /* + * enable wifi by default only on mx + * sb and mx have same wlan pin but the value to enable it are + * different :/ + */ + gpio_request(EFIKA_WLAN_EN, "wlan_en"); + gpio_direction_output(EFIKA_WLAN_EN, 0); + msleep(10); + + gpio_request(EFIKA_WLAN_RESET, "wlan_rst"); + gpio_direction_output(EFIKA_WLAN_RESET, 0); + msleep(10); + gpio_set_value(EFIKA_WLAN_RESET, 1); +} + +static void __init mx51_efikamx_timer_init(void) +{ + mx51_clocks_init(32768, 24000000, 22579200, 24576000); +} + +static struct sys_timer mx51_efikamx_timer = { + .init = mx51_efikamx_timer_init, +}; + +MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop") + /* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */ + .atag_offset = 0x100, + .map_io = mx51_map_io, + .init_early = imx51_init_early, + .init_irq = mx51_init_irq, + .handle_irq = imx51_handle_irq, + .timer = &mx51_efikamx_timer, + .init_machine = mx51_efikamx_init, +MACHINE_END |