X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Farm%2Fmach-ixp4xx%2Fdsmg600-setup.c;h=8cb07437a807f81d92eed0bbd1a7d82b5118ab5d;hb=54f53f2b94feb72622bec7a8563fc487d9f97720;hp=1caff65e22cc398ce5df87f87c64ea0207418e34;hpb=972d45fb43f0f0793fa275c4a22998106760cd61;p=linux-2.6 diff --git a/arch/arm/mach-ixp4xx/dsmg600-setup.c b/arch/arm/mach-ixp4xx/dsmg600-setup.c index 1caff65e22..8cb07437a8 100644 --- a/arch/arm/mach-ixp4xx/dsmg600-setup.c +++ b/arch/arm/mach-ixp4xx/dsmg600-setup.c @@ -1,23 +1,37 @@ /* * DSM-G600 board-setup * + * Copyright (C) 2008 Rod Whitby * Copyright (C) 2006 Tower Technologies - * Author: Alessandro Zummo * - * based ixdp425-setup.c: + * based on ixdp425-setup.c: * Copyright (C) 2003-2004 MontaVista Software, Inc. + * based on nslu2-power.c: + * Copyright (C) 2005 Tower Technologies + * based on nslu2-io.c: + * Copyright (C) 2004 Karen Spearel * * Author: Alessandro Zummo + * Author: Michael Westerhof + * Author: Rod Whitby * Maintainers: http://www.nslu2-linux.org/ */ -#include +#include +#include +#include #include #include +#include +#include +#include +#include #include #include #include +#include +#include static struct flash_platform_data dsmg600_flash_data = { .map_name = "cfi_probe", @@ -36,40 +50,47 @@ static struct platform_device dsmg600_flash = { .resource = &dsmg600_flash_resource, }; -static struct ixp4xx_i2c_pins dsmg600_i2c_gpio_pins = { +static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = { .sda_pin = DSMG600_SDA_PIN, .scl_pin = DSMG600_SCL_PIN, }; -static struct platform_device dsmg600_i2c_controller = { - .name = "IXP4XX-I2C", +static struct platform_device dsmg600_i2c_gpio = { + .name = "i2c-gpio", .id = 0, - .dev.platform_data = &dsmg600_i2c_gpio_pins, + .dev = { + .platform_data = &dsmg600_i2c_gpio_data, + }, +}; + +static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = { + { + I2C_BOARD_INFO("rtc-pcf8563", 0x51), + }, }; -#ifdef CONFIG_LEDS_CLASS -static struct resource dsmg600_led_resources[] = { +static struct gpio_led dsmg600_led_pins[] = { { - .name = "power", - .start = DSMG600_LED_PWR_GPIO, - .end = DSMG600_LED_PWR_GPIO, - .flags = IXP4XX_GPIO_HIGH, + .name = "dsmg600:green:power", + .gpio = DSMG600_LED_PWR_GPIO, }, { - .name = "wlan", - .start = DSMG600_LED_WLAN_GPIO, - .end = DSMG600_LED_WLAN_GPIO, - .flags = IXP4XX_GPIO_LOW, + .name = "dsmg600:green:wlan", + .gpio = DSMG600_LED_WLAN_GPIO, + .active_low = true, }, }; +static struct gpio_led_platform_data dsmg600_led_data = { + .num_leds = ARRAY_SIZE(dsmg600_led_pins), + .leds = dsmg600_led_pins, +}; + static struct platform_device dsmg600_leds = { - .name = "IXP4XX-GPIO-LED", - .id = -1, - .num_resources = ARRAY_SIZE(dsmg600_led_resources), - .resource = dsmg600_led_resources, + .name = "leds-gpio", + .id = -1, + .dev.platform_data = &dsmg600_led_data, }; -#endif static struct resource dsmg600_uart_resources[] = { { @@ -115,8 +136,9 @@ static struct platform_device dsmg600_uart = { }; static struct platform_device *dsmg600_devices[] __initdata = { - &dsmg600_i2c_controller, + &dsmg600_i2c_gpio, &dsmg600_flash, + &dsmg600_leds, }; static void dsmg600_power_off(void) @@ -128,6 +150,70 @@ static void dsmg600_power_off(void) gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH); } +/* This is used to make sure the power-button pusher is serious. The button + * must be held until the value of this counter reaches zero. + */ +static int power_button_countdown; + +/* Must hold the button down for at least this many counts to be processed */ +#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */ + +static void dsmg600_power_handler(unsigned long data); +static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0); + +static void dsmg600_power_handler(unsigned long data) +{ + /* This routine is called twice per second to check the + * state of the power button. + */ + + if (gpio_get_value(DSMG600_PB_GPIO)) { + + /* IO Pin is 1 (button pushed) */ + if (power_button_countdown > 0) + power_button_countdown--; + + } else { + + /* Done on button release, to allow for auto-power-on mods. */ + if (power_button_countdown == 0) { + /* Signal init to do the ctrlaltdel action, + * this will bypass init if it hasn't started + * and do a kernel_restart. + */ + ctrl_alt_del(); + + /* Change the state of the power LED to "blink" */ + gpio_line_set(DSMG600_LED_PWR_GPIO, IXP4XX_GPIO_LOW); + } else { + power_button_countdown = PBUTTON_HOLDDOWN_COUNT; + } + } + + mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500)); +} + +static irqreturn_t dsmg600_reset_handler(int irq, void *dev_id) +{ + /* This is the paper-clip reset, it shuts the machine down directly. */ + machine_power_off(); + + return IRQ_HANDLED; +} + +static void __init dsmg600_timer_init(void) +{ + /* The xtal on this machine is non-standard. */ + ixp4xx_timer_freq = DSMG600_FREQ; + + /* Call standard timer_init function. */ + ixp4xx_timer_init(); +} + +static struct sys_timer dsmg600_timer = { + .init = dsmg600_timer_init, +}; + static void __init dsmg600_init(void) { ixp4xx_sys_init(); @@ -139,7 +225,8 @@ static void __init dsmg600_init(void) dsmg600_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; - pm_power_off = dsmg600_power_off; + i2c_register_board_info(0, dsmg600_i2c_board_info, + ARRAY_SIZE(dsmg600_i2c_board_info)); /* The UART is required on the DSM-G600 (Redboot cannot use the * NIC) -- do it here so that it does *not* get removed if @@ -149,17 +236,28 @@ static void __init dsmg600_init(void) platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices)); -#ifdef CONFIG_LEDS_CLASS - /* We don't care whether or not this works. */ - (void)platform_device_register(&dsmg600_leds); -#endif -} + pm_power_off = dsmg600_power_off; -static void __init dsmg600_fixup(struct machine_desc *desc, - struct tag *tags, char **cmdline, struct meminfo *mi) -{ - /* The xtal on this machine is non-standard. */ - ixp4xx_timer_freq = DSMG600_FREQ; + if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler, + IRQF_DISABLED | IRQF_TRIGGER_LOW, + "DSM-G600 reset button", NULL) < 0) { + + printk(KERN_DEBUG "Reset Button IRQ %d not available\n", + gpio_to_irq(DSMG600_RB_GPIO)); + } + + /* The power button on the D-Link DSM-G600 is on GPIO 15, but + * it cannot handle interrupts on that GPIO line. So we'll + * have to poll it with a kernel timer. + */ + + /* Make sure that the power button GPIO is set up as an input */ + gpio_line_config(DSMG600_PB_GPIO, IXP4XX_GPIO_IN); + + /* Set the initial value for the power button IRQ handler */ + power_button_countdown = PBUTTON_HOLDDOWN_COUNT; + + mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500)); } MACHINE_START(DSMG600, "D-Link DSM-G600 RevA") @@ -167,9 +265,8 @@ MACHINE_START(DSMG600, "D-Link DSM-G600 RevA") .phys_io = IXP4XX_PERIPHERAL_BASE_PHYS, .io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC, .boot_params = 0x00000100, - .fixup = dsmg600_fixup, .map_io = ixp4xx_map_io, .init_irq = ixp4xx_init_irq, - .timer = &ixp4xx_timer, + .timer = &dsmg600_timer, .init_machine = dsmg600_init, MACHINE_END