/* * 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/fsl_devices.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 <mach/i2c.h> #include <mach/mxc_ehci.h> #include <asm/irq.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 "devices.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); id |= gpio_get_value(EFIKAMX_PCBID1) << 1; id |= gpio_get_value(EFIKAMX_PCBID2) << 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[] = { { .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 struct gpio_led_platform_data mx51_efikamx_leds_data = { .leds = mx51_efikamx_leds, .num_leds = ARRAY_SIZE(mx51_efikamx_leds), }; static struct platform_device mx51_efikamx_leds_device = { .name = "leds-gpio", .id = -1, .dev = { .platform_data = &mx51_efikamx_leds_data, }, }; 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) { 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(1, NULL); mx51_efikamx_leds[2].default_trigger = "mmc1"; } platform_device_register(&mx51_efikamx_leds_device); imx51_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> */ .boot_params = MX51_PHYS_OFFSET + 0x100, .map_io = mx51_map_io, .init_early = imx51_init_early, .init_irq = mx51_init_irq, .timer = &mx51_efikamx_timer, .init_machine = mx51_efikamx_init, MACHINE_END