133 lines
4 KiB
Diff
133 lines
4 KiB
Diff
---
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arch/arm/mach-ixp4xx/nas100d-power.c | 68 ++++++++++++++++++++++++++++++++--
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include/asm-arm/arch-ixp4xx/nas100d.h | 18 +++++----
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2 files changed, 75 insertions(+), 11 deletions(-)
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Index: linux-2.6.22-rc5-armeb/arch/arm/mach-ixp4xx/nas100d-power.c
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===================================================================
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--- linux-2.6.22-rc5-armeb.orig/arch/arm/mach-ixp4xx/nas100d-power.c
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+++ linux-2.6.22-rc5-armeb/arch/arm/mach-ixp4xx/nas100d-power.c
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@@ -21,15 +21,60 @@
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/reboot.h>
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+#include <linux/jiffies.h>
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+#include <linux/timer.h>
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#include <asm/mach-types.h>
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-static irqreturn_t nas100d_reset_handler(int irq, void *dev_id)
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+extern void ctrl_alt_del(void);
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+
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+/* This is used to make sure the power-button pusher is serious. The button
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+ * must be held until the value of this counter reaches zero.
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+ */
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+static volatile int power_button_countdown;
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+
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+/* Must hold the button down for at least this many counts to be processed */
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+#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */
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+
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+static void nas100d_power_handler(unsigned long data);
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+static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0);
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+
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+static void nas100d_power_handler(unsigned long data)
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{
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- /* Signal init to do the ctrlaltdel action, this will bypass init if
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- * it hasn't started and do a kernel_restart.
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+ /* This routine is called twice per second to check the
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+ * state of the power button.
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*/
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- ctrl_alt_del();
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+
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+ if (*IXP4XX_GPIO_GPINR & NAS100D_PB_BM) {
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+
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+ /* IO Pin is 1 (button pushed) */
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+ if (power_button_countdown > 0) {
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+ power_button_countdown--;
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+ }
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+
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+ } else {
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+
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+ /* Done on button release, to allow for auto-power-on mods. */
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+ if (power_button_countdown == 0) {
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+ /* Signal init to do the ctrlaltdel action, this will bypass
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+ * init if it hasn't started and do a kernel_restart.
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+ */
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+ ctrl_alt_del();
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+
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+ /* Change the state of the power LED to "blink" */
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+ gpio_line_set(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
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+ } else {
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+ power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
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+ }
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+ }
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+
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+ mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
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+}
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+
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+static irqreturn_t nas100d_reset_handler(int irq, void *dev_id)
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+{
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+ /* This is the paper-clip reset, it shuts the machine down directly. */
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+ machine_power_off();
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return IRQ_HANDLED;
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}
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@@ -50,6 +95,19 @@
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return -EIO;
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}
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+ /* The power button on the Iomega NAS100d is on GPIO 14, but
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+ * it cannot handle interrupts on that GPIO line. So we'll
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+ * have to poll it with a kernel timer.
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+ */
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+
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+ /* Make sure that the power button GPIO is set up as an input */
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+ gpio_line_config(NAS100D_PB_GPIO, IXP4XX_GPIO_IN);
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+
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+ /* Set the initial value for the power button IRQ handler */
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+ power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
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+
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+ mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
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+
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return 0;
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}
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@@ -58,6 +116,8 @@
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if (!(machine_is_nas100d()))
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return;
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+ del_timer_sync(&nas100d_power_timer);
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+
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free_irq(NAS100D_RB_IRQ, NULL);
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}
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Index: linux-2.6.22-rc5-armeb/include/asm-arm/arch-ixp4xx/nas100d.h
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===================================================================
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--- linux-2.6.22-rc5-armeb.orig/include/asm-arm/arch-ixp4xx/nas100d.h
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+++ linux-2.6.22-rc5-armeb/include/asm-arm/arch-ixp4xx/nas100d.h
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@@ -39,14 +39,18 @@
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/* Buttons */
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#define NAS100D_PB_GPIO 14
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+#define NAS100D_PB_BM (1L << NAS100D_PB_GPIO)
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+
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#define NAS100D_RB_GPIO 4
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-#define NAS100D_PO_GPIO 12 /* power off */
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-#define NAS100D_PB_IRQ IRQ_IXP4XX_GPIO14
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#define NAS100D_RB_IRQ IRQ_IXP4XX_GPIO4
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-/*
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-#define NAS100D_PB_BM (1L << NAS100D_PB_GPIO)
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-#define NAS100D_PO_BM (1L << NAS100D_PO_GPIO)
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-#define NAS100D_RB_BM (1L << NAS100D_RB_GPIO)
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-*/
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+#define NAS100D_PO_GPIO 12 /* power off */
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+
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+/* LEDs */
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+
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+#define NAS100D_LED_PWR_GPIO 15
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+#define NAS100D_LED_PWR_BM (1L << NAS100D_LED_PWR_GPIO)
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+
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+#define NAS100D_LED_WLAN_GPIO 0
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+#define NAS100D_LED_WLAN_BM (1L << NAS100D_LED_WLAN_GPIO)
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