diff options
Diffstat (limited to 'arch/arm/mach-omap1/board-ams-delta.c')
| -rw-r--r-- | arch/arm/mach-omap1/board-ams-delta.c | 301 |
1 files changed, 245 insertions, 56 deletions
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c index 80f54cb54276..dd28d2614d7f 100644 --- a/arch/arm/mach-omap1/board-ams-delta.c +++ b/arch/arm/mach-omap1/board-ams-delta.c @@ -41,10 +41,10 @@ #include <mach/mux.h> #include <mach/hardware.h> -#include <mach/ams-delta-fiq.h> #include "camera.h" #include <mach/usb.h> +#include "ams-delta-fiq.h" #include "iomap.h" #include "common.h" @@ -179,7 +179,10 @@ static struct resource latch1_resources[] = { }, }; +#define LATCH1_LABEL "latch1" + static struct bgpio_pdata latch1_pdata = { + .label = LATCH1_LABEL, .base = LATCH1_GPIO_BASE, .ngpio = LATCH1_NGPIO, }; @@ -194,6 +197,15 @@ static struct platform_device latch1_gpio_device = { }, }; +#define LATCH1_PIN_LED_CAMERA 0 +#define LATCH1_PIN_LED_ADVERT 1 +#define LATCH1_PIN_LED_MAIL 2 +#define LATCH1_PIN_LED_HANDSFREE 3 +#define LATCH1_PIN_LED_VOICEMAIL 4 +#define LATCH1_PIN_LED_VOICE 5 +#define LATCH1_PIN_DOCKIT1 6 +#define LATCH1_PIN_DOCKIT2 7 + static struct resource latch2_resources[] = { [0] = { .name = "dat", @@ -398,38 +410,43 @@ static struct gpiod_lookup_table ams_delta_lcd_gpio_table = { }, }; -static const struct gpio_led gpio_leds[] __initconst = { - { +/* + * Dynamically allocated GPIO numbers must be obtained fromm GPIO device + * before they can be put in the gpio_led table. Before that happens, + * initialize the table with invalid GPIO numbers, not 0. + */ +static struct gpio_led gpio_leds[] __initdata = { + [LATCH1_PIN_LED_CAMERA] = { .name = "camera", - .gpio = LATCH1_GPIO_BASE + 0, + .gpio = -EINVAL, .default_state = LEDS_GPIO_DEFSTATE_OFF, #ifdef CONFIG_LEDS_TRIGGERS .default_trigger = "ams_delta_camera", #endif }, - { + [LATCH1_PIN_LED_ADVERT] = { .name = "advert", - .gpio = LATCH1_GPIO_BASE + 1, + .gpio = -EINVAL, .default_state = LEDS_GPIO_DEFSTATE_OFF, }, - { + [LATCH1_PIN_LED_MAIL] = { .name = "email", - .gpio = LATCH1_GPIO_BASE + 2, + .gpio = -EINVAL, .default_state = LEDS_GPIO_DEFSTATE_OFF, }, - { + [LATCH1_PIN_LED_HANDSFREE] = { .name = "handsfree", - .gpio = LATCH1_GPIO_BASE + 3, + .gpio = -EINVAL, .default_state = LEDS_GPIO_DEFSTATE_OFF, }, - { + [LATCH1_PIN_LED_VOICEMAIL] = { .name = "voicemail", - .gpio = LATCH1_GPIO_BASE + 4, + .gpio = -EINVAL, .default_state = LEDS_GPIO_DEFSTATE_OFF, }, - { + [LATCH1_PIN_LED_VOICE] = { .name = "voice", - .gpio = LATCH1_GPIO_BASE + 5, + .gpio = -EINVAL, .default_state = LEDS_GPIO_DEFSTATE_OFF, }, }; @@ -504,16 +521,70 @@ static struct platform_device cx20442_codec_device = { .id = -1, }; -static struct gpiod_lookup_table ams_delta_serio_gpio_table = { +static struct resource ams_delta_serio_resources[] = { + { + .flags = IORESOURCE_IRQ, + /* + * Initialize IRQ resource with invalid IRQ number. + * It will be replaced with dynamically allocated GPIO IRQ + * obtained from GPIO chip as soon as the chip is available. + */ + .start = -EINVAL, + .end = -EINVAL, + }, +}; + +static struct platform_device ams_delta_serio_device = { + .name = "ams-delta-serio", + .id = PLATFORM_DEVID_NONE, + .dev = { + /* + * Initialize .platform_data explicitly with NULL to + * indicate it is going to be used. It will be replaced + * with FIQ buffer address as soon as FIQ is initialized. + */ + .platform_data = NULL, + }, + .num_resources = ARRAY_SIZE(ams_delta_serio_resources), + .resource = ams_delta_serio_resources, +}; + +static struct regulator_consumer_supply keybrd_pwr_consumers[] = { + /* + * Initialize supply .dev_name with NULL. It will be replaced + * with serio dev_name() as soon as the serio device is registered. + */ + REGULATOR_SUPPLY("vcc", NULL), +}; + +static struct regulator_init_data keybrd_pwr_initdata = { + .constraints = { + .valid_ops_mask = REGULATOR_CHANGE_STATUS, + }, + .num_consumer_supplies = ARRAY_SIZE(keybrd_pwr_consumers), + .consumer_supplies = keybrd_pwr_consumers, +}; + +static struct fixed_voltage_config keybrd_pwr_config = { + .supply_name = "keybrd_pwr", + .microvolts = 5000000, + .gpio = AMS_DELTA_GPIO_PIN_KEYBRD_PWR, + .enable_high = 1, + .init_data = &keybrd_pwr_initdata, +}; + +static struct platform_device keybrd_pwr_device = { + .name = "reg-fixed-voltage", + .id = PLATFORM_DEVID_AUTO, + .dev = { + .platform_data = &keybrd_pwr_config, + }, +}; + +static struct gpiod_lookup_table keybrd_pwr_gpio_table = { .table = { - GPIO_LOOKUP(OMAP_GPIO_LABEL, AMS_DELTA_GPIO_PIN_KEYBRD_DATA, - "data", 0), - GPIO_LOOKUP(OMAP_GPIO_LABEL, AMS_DELTA_GPIO_PIN_KEYBRD_CLK, - "clock", 0), - GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_KEYBRD_PWR, - "power", 0), - GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_KEYBRD_DATAOUT, - "dataout", 0), + GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_KEYBRD_PWR, NULL, + GPIO_ACTIVE_HIGH), { }, }, }; @@ -524,9 +595,7 @@ static struct platform_device *ams_delta_devices[] __initdata = { &ams_delta_kp_device, &ams_delta_camera_device, &ams_delta_audio_device, -}; - -static struct platform_device *late_devices[] __initdata = { + &ams_delta_serio_device, &ams_delta_nand_device, &ams_delta_lcd_device, &cx20442_codec_device, @@ -534,14 +603,55 @@ static struct platform_device *late_devices[] __initdata = { static struct gpiod_lookup_table *ams_delta_gpio_tables[] __initdata = { &ams_delta_audio_gpio_table, - &ams_delta_serio_gpio_table, -}; - -static struct gpiod_lookup_table *late_gpio_tables[] __initdata = { + &keybrd_pwr_gpio_table, &ams_delta_lcd_gpio_table, &ams_delta_nand_gpio_table, }; +/* + * Some drivers may not use GPIO lookup tables but need to be provided + * with GPIO numbers. The same applies to GPIO based IRQ lines - some + * drivers may even not use GPIO layer but expect just IRQ numbers. + * We could either define GPIO lookup tables then use them on behalf + * of those devices, or we can use GPIO driver level methods for + * identification of GPIO and IRQ numbers. For the purpose of the latter, + * defina a helper function which identifies GPIO chips by their labels. + */ +static int gpiochip_match_by_label(struct gpio_chip *chip, void *data) +{ + char *label = data; + + return !strcmp(label, chip->label); +} + +static struct gpiod_hog ams_delta_gpio_hogs[] = { + GPIO_HOG(LATCH2_LABEL, LATCH2_PIN_KEYBRD_DATAOUT, "keybrd_dataout", + GPIO_ACTIVE_HIGH, GPIOD_OUT_LOW), + {}, +}; + +/* + * The purpose of this function is to take care of proper initialization of + * devices and data structures which depend on GPIO lines provided by OMAP GPIO + * banks but their drivers don't use GPIO lookup tables or GPIO layer at all. + * The function may be called as soon as OMAP GPIO devices are probed. + * Since that happens at postcore_initcall, it can be called successfully + * from init_machine or later. + * Dependent devices may be registered from within this function or later. + */ +static void __init omap_gpio_deps_init(void) +{ + struct gpio_chip *chip; + + chip = gpiochip_find(OMAP_GPIO_LABEL, gpiochip_match_by_label); + if (!chip) { + pr_err("%s: OMAP GPIO chip not found\n", __func__); + return; + } + + ams_delta_init_fiq(chip, &ams_delta_serio_device); +} + static void __init ams_delta_init(void) { /* mux pins for uarts */ @@ -562,6 +672,9 @@ static void __init ams_delta_init(void) omap_cfg_reg(J19_1610_CAM_D6); omap_cfg_reg(J18_1610_CAM_D7); + omap_gpio_deps_init(); + gpiod_add_hogs(ams_delta_gpio_hogs); + omap_serial_init(); omap_register_i2c_bus(1, 100, NULL, 0); @@ -571,25 +684,38 @@ static void __init ams_delta_init(void) led_trigger_register_simple("ams_delta_camera", &ams_delta_camera_led_trigger); #endif - gpio_led_register_device(-1, &leds_pdata); platform_add_devices(ams_delta_devices, ARRAY_SIZE(ams_delta_devices)); /* - * As soon as devices have been registered, assign their dev_names - * to respective GPIO lookup tables before they are added. + * As soon as regulator consumers have been registered, assign their + * dev_names to consumer supply entries of respective regulators. + */ + keybrd_pwr_consumers[0].dev_name = + dev_name(&ams_delta_serio_device.dev); + + /* + * Once consumer supply entries are populated with dev_names, + * register regulator devices. At this stage only the keyboard + * power regulator has its consumer supply table fully populated. + */ + platform_device_register(&keybrd_pwr_device); + + /* + * As soon as GPIO consumers have been registered, assign + * their dev_names to respective GPIO lookup tables. */ ams_delta_audio_gpio_table.dev_id = dev_name(&ams_delta_audio_device.dev); + keybrd_pwr_gpio_table.dev_id = dev_name(&keybrd_pwr_device.dev); + ams_delta_nand_gpio_table.dev_id = dev_name(&ams_delta_nand_device.dev); + ams_delta_lcd_gpio_table.dev_id = dev_name(&ams_delta_lcd_device.dev); + /* - * No device name is assigned to GPIO lookup table for serio device - * as long as serio driver is not converted to platform device driver. + * Once GPIO lookup tables are populated with dev_names, register them. */ - gpiod_add_lookup_tables(ams_delta_gpio_tables, ARRAY_SIZE(ams_delta_gpio_tables)); - ams_delta_init_fiq(); - omap_writew(omap_readw(ARM_RSTCT1) | 0x0004, ARM_RSTCT1); omapfb_set_lcd_config(&ams_delta_lcd_config); @@ -643,35 +769,84 @@ static struct platform_device ams_delta_modem_device = { }, }; -static int __init late_init(void) +/* + * leds-gpio driver doesn't make use of GPIO lookup tables, + * it has to be provided with GPIO numbers over platform data + * if GPIO descriptor info can't be obtained from device tree. + * We could either define GPIO lookup tables and use them on behalf + * of the leds-gpio device, or we can use GPIO driver level methods + * for identification of GPIO numbers as long as we don't support + * device tree. Let's do the latter. + */ +static void __init ams_delta_led_init(struct gpio_chip *chip) +{ + struct gpio_desc *gpiod; + int i; + + for (i = LATCH1_PIN_LED_CAMERA; i < LATCH1_PIN_DOCKIT1; i++) { + gpiod = gpiochip_request_own_desc(chip, i, NULL); + if (IS_ERR(gpiod)) { + pr_warn("%s: %s GPIO %d request failed (%ld)\n", + __func__, LATCH1_LABEL, i, PTR_ERR(gpiod)); + continue; + } + + /* Assign GPIO numbers to LED device. */ + gpio_leds[i].gpio = desc_to_gpio(gpiod); + + gpiochip_free_own_desc(gpiod); + } + + gpio_led_register_device(PLATFORM_DEVID_NONE, &leds_pdata); +} + +/* + * The purpose of this function is to take care of assignment of GPIO numbers + * to platform devices which depend on GPIO lines provided by Amstrad Delta + * latch1 and/or latch2 GPIO devices but don't use GPIO lookup tables. + * The function may be called as soon as latch1/latch2 GPIO devices are + * initilized. Since basic-mmio-gpio driver is not registered before + * device_initcall, this may happen at erliest during device_initcall_sync. + * Dependent devices shouldn't be registered before that, their + * registration may be performed from within this function or later. + */ +static int __init ams_delta_gpio_init(void) { + struct gpio_chip *chip; int err; if (!machine_is_ams_delta()) return -ENODEV; + chip = gpiochip_find(LATCH1_LABEL, gpiochip_match_by_label); + if (!chip) + pr_err("%s: latch1 GPIO chip not found\n", __func__); + else + ams_delta_led_init(chip); + err = gpio_request_array(latch_gpios, ARRAY_SIZE(latch_gpios)); - if (err) { + if (err) pr_err("Couldn't take over latch1/latch2 GPIO pins\n"); - return err; - } - platform_add_devices(late_devices, ARRAY_SIZE(late_devices)); - - /* - * As soon as devices have been registered, assign their dev_names - * to respective GPIO lookup tables before they are added. - */ - ams_delta_lcd_gpio_table.dev_id = dev_name(&ams_delta_lcd_device.dev); - ams_delta_nand_gpio_table.dev_id = dev_name(&ams_delta_nand_device.dev); + return err; +} +device_initcall_sync(ams_delta_gpio_init); - gpiod_add_lookup_tables(late_gpio_tables, ARRAY_SIZE(late_gpio_tables)); +static int __init modem_nreset_init(void) +{ + int err; err = platform_device_register(&modem_nreset_device); - if (err) { + if (err) pr_err("Couldn't register the modem regulator device\n"); - return err; - } + + return err; +} + + +static int __init ams_delta_modem_init(void) +{ + int err; omap_cfg_reg(M14_1510_GPIO2); ams_delta_modem_ports[0].irq = @@ -692,7 +867,22 @@ static int __init late_init(void) err = platform_device_register(&ams_delta_modem_device); if (err) - goto gpio_free; + gpio_free(AMS_DELTA_GPIO_PIN_MODEM_IRQ); + + return err; +} + +static int __init late_init(void) +{ + int err; + + err = modem_nreset_init(); + if (err) + return err; + + err = ams_delta_modem_init(); + if (err) + return err; /* * Once the modem device is registered, the modem_nreset @@ -708,7 +898,6 @@ static int __init late_init(void) unregister: platform_device_unregister(&ams_delta_modem_device); -gpio_free: gpio_free(AMS_DELTA_GPIO_PIN_MODEM_IRQ); return err; } |