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-rw-r--r--arch/arm/mach-ixp4xx/nas100d-power.c75
-rw-r--r--arch/arm/mach-ixp4xx/nas100d-setup.c14
2 files changed, 74 insertions, 15 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,
},
};