openwrtv3/target/linux/ixp4xx/patches-2.6.23/017-nas100d_auto_power_on.patch

---
 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)