diff options
Diffstat (limited to 'target/linux/ixp4xx/patches-2.6.24/017-nas100d_auto_power_on.patch')
| -rw-r--r-- | target/linux/ixp4xx/patches-2.6.24/017-nas100d_auto_power_on.patch | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/target/linux/ixp4xx/patches-2.6.24/017-nas100d_auto_power_on.patch b/target/linux/ixp4xx/patches-2.6.24/017-nas100d_auto_power_on.patch new file mode 100644 index 000000000..b77df4850 --- /dev/null +++ b/target/linux/ixp4xx/patches-2.6.24/017-nas100d_auto_power_on.patch @@ -0,0 +1,188 @@ +Upgrade the power and reset button handling for the NAS100D: + * Convert GPIO and IRQ handling to use the <asm/gpio.h> api. + * Perform the reset only after the power button has been held down + for at least two seconds. Do the reset on the release of the power + button, so that NAS devices which have been set to auto-power-on (by + bridging the power button) do not continuously power cycle. + * Remove all superflous constants from nas100d.h + * Add LED constants to nas100d.h while we're there. +Also, update the board LED setup code to use constants. + +Signed-off-by: Rod Whitby <rod@whitby.id.au> + +Index: linux-2.6.23.12-armeb/arch/arm/mach-ixp4xx/nas100d-power.c +=================================================================== +--- linux-2.6.23.12-armeb.orig/arch/arm/mach-ixp4xx/nas100d-power.c 2008-01-11 16:59:20.000000000 +1030 ++++ linux-2.6.23.12-armeb/arch/arm/mach-ixp4xx/nas100d-power.c 2008-01-11 17:03:23.000000000 +1030 +@@ -21,15 +21,61 @@ + #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) ++extern void ctrl_alt_del(void); ++ ++/* 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 volatile 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 +85,30 @@ + 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 +117,9 @@ + 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); +Index: linux-2.6.23.12-armeb/include/asm-arm/arch-ixp4xx/nas100d.h +=================================================================== +--- linux-2.6.23.12-armeb.orig/include/asm-arm/arch-ixp4xx/nas100d.h 2008-01-11 16:59:20.000000000 +1030 ++++ linux-2.6.23.12-armeb/include/asm-arm/arch-ixp4xx/nas100d.h 2008-01-11 17:03:23.000000000 +1030 +@@ -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 +Index: linux-2.6.23.12-armeb/arch/arm/mach-ixp4xx/nas100d-setup.c +=================================================================== +--- linux-2.6.23.12-armeb.orig/arch/arm/mach-ixp4xx/nas100d-setup.c 2008-01-11 17:03:23.000000000 +1030 ++++ linux-2.6.23.12-armeb/arch/arm/mach-ixp4xx/nas100d-setup.c 2008-01-11 17:06:15.000000000 +1030 +@@ -44,20 +44,20 @@ + 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 is 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, + }, + }; |