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---
arch/arm/mach-ixp4xx/nas100d-power.c | 68 ++++++++++++++++++++++++++++++++--
include/asm-arm/arch-ixp4xx/nas100d.h | 18 +++++----
2 files changed, 75 insertions(+), 11 deletions(-)
Index: linux-2.6.22-rc5-armeb/arch/arm/mach-ixp4xx/nas100d-power.c
===================================================================
--- linux-2.6.22-rc5-armeb.orig/arch/arm/mach-ixp4xx/nas100d-power.c
+++ linux-2.6.22-rc5-armeb/arch/arm/mach-ixp4xx/nas100d-power.c
@@ -21,15 +21,60 @@
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/reboot.h>
+#include <linux/jiffies.h>
+#include <linux/timer.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 (*IXP4XX_GPIO_GPINR & NAS100D_PB_BM) {
+
+ /* 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;
}
@@ -50,6 +95,19 @@
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;
}
@@ -58,6 +116,8 @@
if (!(machine_is_nas100d()))
return;
+ del_timer_sync(&nas100d_power_timer);
+
free_irq(NAS100D_RB_IRQ, NULL);
}
Index: linux-2.6.22-rc5-armeb/include/asm-arm/arch-ixp4xx/nas100d.h
===================================================================
--- linux-2.6.22-rc5-armeb.orig/include/asm-arm/arch-ixp4xx/nas100d.h
+++ linux-2.6.22-rc5-armeb/include/asm-arm/arch-ixp4xx/nas100d.h
@@ -39,14 +39,18 @@
/* Buttons */
#define NAS100D_PB_GPIO 14
+#define NAS100D_PB_BM (1L << NAS100D_PB_GPIO)
+
#define NAS100D_RB_GPIO 4
-#define NAS100D_PO_GPIO 12 /* power off */
-#define NAS100D_PB_IRQ IRQ_IXP4XX_GPIO14
#define NAS100D_RB_IRQ IRQ_IXP4XX_GPIO4
-/*
-#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_PO_GPIO 12 /* power off */
+
+/* LEDs */
+
+#define NAS100D_LED_PWR_GPIO 15
+#define NAS100D_LED_PWR_BM (1L << NAS100D_LED_PWR_GPIO)
+
+#define NAS100D_LED_WLAN_GPIO 0
+#define NAS100D_LED_WLAN_BM (1L << NAS100D_LED_WLAN_GPIO)
|
