mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-02 00:29:41 +02:00
a5a03eb6b4
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10636 3c298f89-4303-0410-b956-a3cf2f4a3e73
198 lines
6.0 KiB
Diff
198 lines
6.0 KiB
Diff
From 6261e59795d861f21f63878944900a3da713348c Mon Sep 17 00:00:00 2001
|
|
From: Rod Whitby <rod@whitby.id.au>
|
|
Date: Tue, 29 Jan 2008 09:53:46 +1030
|
|
Subject: ixp4xx: Button and LED updates for the nas100d board (Patch #4768)
|
|
|
|
* 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
|
|
solder 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.
|
|
* Update the board LED setup code to use those constants.
|
|
|
|
Signed-off-by: Rod Whitby <rod@whitby.id.au>
|
|
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
|
|
|
|
PATCH FOLLOWS
|
|
KernelVersion: 2.6.24-git5
|
|
|
|
diff --git a/arch/arm/mach-ixp4xx/nas100d-power.c b/arch/arm/mach-ixp4xx/nas100d-power.c
|
|
index 29aa98d..4c1c01b 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 54d884f..213a4ce 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,
|
|
},
|
|
};
|
|
diff --git a/include/asm-arm/arch-ixp4xx/nas100d.h b/include/asm-arm/arch-ixp4xx/nas100d.h
|
|
index 131e0a1..98d9378 100644
|
|
--- a/include/asm-arm/arch-ixp4xx/nas100d.h
|
|
+++ b/include/asm-arm/arch-ixp4xx/nas100d.h
|
|
@@ -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
|
|
--
|
|
1.5.2.5
|
|
|