diff options
| -rw-r--r-- | arch/arm/mach-ixp4xx/nas100d-power.c | 75 | ||||
| -rw-r--r-- | arch/arm/mach-ixp4xx/nas100d-setup.c | 14 | ||||
| -rw-r--r-- | include/asm-arm/arch-ixp4xx/nas100d.h | 18 |
3 files changed, 83 insertions, 24 deletions
diff --git a/arch/arm/mach-ixp4xx/nas100d-power.c b/arch/arm/mach-ixp4xx/nas100d-power.c index 29aa98d3a7f..4c1c01bb3fe 100644 --- a/arch/arm/mach-ixp4xx/nas100d-power.c +++ b/arch/arm/mach-ixp4xx/nas100d-power.c @@ -21,15 +21,59 @@ #include <linux/irq.h> #include <linux/module.h> #include <linux/reboot.h> +#include <linux/jiffies.h> +#include <linux/timer.h> +#include <asm/gpio.h> #include <asm/mach-types.h> -static irqreturn_t nas100d_reset_handler(int irq, void *dev_id) +/* 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 nas100d_power_handler(unsigned long data); +static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0); + +static void nas100d_power_handler(unsigned long data) { - /* Signal init to do the ctrlaltdel action, this will bypass init if - * it hasn't started and do a kernel_restart. + /* This routine is called twice per second to check the + * state of the power button. */ - ctrl_alt_del(); + + if (gpio_get_value(NAS100D_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(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW); + } else { + power_button_countdown = PBUTTON_HOLDDOWN_COUNT; + } + } + + mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); +} + +static irqreturn_t nas100d_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; } @@ -39,17 +83,30 @@ static int __init nas100d_power_init(void) if (!(machine_is_nas100d())) return 0; - set_irq_type(NAS100D_RB_IRQ, IRQT_LOW); + set_irq_type(gpio_to_irq(NAS100D_RB_GPIO), IRQT_LOW); - if (request_irq(NAS100D_RB_IRQ, &nas100d_reset_handler, + if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler, IRQF_DISABLED, "NAS100D reset button", NULL) < 0) { printk(KERN_DEBUG "Reset Button IRQ %d not available\n", - NAS100D_RB_IRQ); + gpio_to_irq(NAS100D_RB_GPIO)); return -EIO; } + /* The power button on the Iomega NAS100d is on GPIO 14, 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(NAS100D_PB_GPIO, IXP4XX_GPIO_IN); + + /* Set the initial value for the power button IRQ handler */ + power_button_countdown = PBUTTON_HOLDDOWN_COUNT; + + mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); + return 0; } @@ -58,7 +115,9 @@ static void __exit nas100d_power_exit(void) if (!(machine_is_nas100d())) return; - free_irq(NAS100D_RB_IRQ, NULL); + del_timer_sync(&nas100d_power_timer); + + free_irq(gpio_to_irq(NAS100D_RB_GPIO), NULL); } module_init(nas100d_power_init); diff --git a/arch/arm/mach-ixp4xx/nas100d-setup.c b/arch/arm/mach-ixp4xx/nas100d-setup.c index 54d884fb251..213a4cea911 100644 --- a/arch/arm/mach-ixp4xx/nas100d-setup.c +++ b/arch/arm/mach-ixp4xx/nas100d-setup.c @@ -43,20 +43,20 @@ static struct platform_device nas100d_flash = { static struct resource nas100d_led_resources[] = { { .name = "wlan", /* green led */ - .start = 0, - .end = 0, + .start = NAS100D_LED_WLAN_GPIO, + .end = NAS100D_LED_WLAN_GPIO, .flags = IXP4XX_GPIO_LOW, }, { - .name = "ready", /* blue power led (off is flashing!) */ - .start = 15, - .end = 15, + .name = "power", /* blue power led (off=flashing) */ + .start = NAS100D_LED_PWR_GPIO, + .end = NAS100D_LED_PWR_GPIO, .flags = IXP4XX_GPIO_LOW, }, { .name = "disk", /* yellow led */ - .start = 3, - .end = 3, + .start = NAS100D_LED_DISK_GPIO, + .end = NAS100D_LED_DISK_GPIO, .flags = IXP4XX_GPIO_LOW, }, }; diff --git a/include/asm-arm/arch-ixp4xx/nas100d.h b/include/asm-arm/arch-ixp4xx/nas100d.h index 131e0a1d0df..98d937897bc 100644 --- a/include/asm-arm/arch-ixp4xx/nas100d.h +++ b/include/asm-arm/arch-ixp4xx/nas100d.h @@ -38,15 +38,15 @@ /* Buttons */ -#define NAS100D_PB_GPIO 14 -#define NAS100D_RB_GPIO 4 +#define NAS100D_PB_GPIO 14 /* power button */ +#define NAS100D_RB_GPIO 4 /* reset button */ + +/* Power control */ + #define NAS100D_PO_GPIO 12 /* power off */ -#define NAS100D_PB_IRQ IRQ_IXP4XX_GPIO14 -#define NAS100D_RB_IRQ IRQ_IXP4XX_GPIO4 +/* LEDs */ -/* -#define NAS100D_PB_BM (1L << NAS100D_PB_GPIO) -#define NAS100D_PO_BM (1L << NAS100D_PO_GPIO) -#define NAS100D_RB_BM (1L << NAS100D_RB_GPIO) -*/ +#define NAS100D_LED_WLAN_GPIO 0 +#define NAS100D_LED_DISK_GPIO 3 +#define NAS100D_LED_PWR_GPIO 15 |