Index: linux-2.6.15/arch/arm/mach-ixp4xx/ds101-buttons.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/arch/arm/mach-ixp4xx/ds101-buttons.c	2006-02-23 08:40:28.000000000 +0100
@@ -0,0 +1,117 @@
+/*
+ * arch/arm/mach-ixp4xx/ds101-buttons.c
+ *
+ * DS101 Button driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/interrupt.h>
+#include <asm/mach-types.h>
+
+extern void ctrl_alt_del(void);
+static int usbcopyb_irqcount = 0;
+static int resetb_irqcount = 0;
+static int powerb_irqcount = 0;
+
+static irqreturn_t ds101_usbcopy_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	usbcopyb_irqcount++;
+	if (usbcopyb_irqcount > 1)  /* Init creates one IRQ. Ignore it */
+	{
+		/* The GPIO line is shared between the button and the led.
+		 * Make sure the GPIO is GPIO_OUT, so we don't recieve
+		 * irqs from the led going on/off. Disable the irq just in
+		 * case.
+		 */
+		gpio_line_config(DS101_USBCOPYB_IRQ, DS101_GPIO_OUT);
+		disable_irq(DS101_USBCOPYB_IRQ);
+		printk(KERN_INFO "Usbcopy\n");
+	}
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ds101_power_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	powerb_irqcount++;
+	if (powerb_irqcount > 1)
+	{
+		/* Make the power led flash */
+		gpio_line_set(DS101_POWER_LED, DS101_GPIO_HIGH);
+		ctrl_alt_del();
+	}
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ds101_reset_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	resetb_irqcount++;
+	if (resetb_irqcount > 1)
+	{
+		machine_power_off();
+	}
+	return IRQ_HANDLED;
+}
+
+static int __init ds101_buttons_init(void)
+{
+	if (!(machine_is_ds101()))
+		return 0;
+	printk(KERN_INFO "DiskStation DS101 button driver v0.2\n");
+	gpio_line_config(DS101_POWERB_GPIO, (DS101_GPIO_IN|IRQT_FALLING));
+	gpio_line_config(DS101_RESETB_GPIO, (DS101_GPIO_IN|IRQT_FALLING));
+	gpio_line_config(DS101_USBCOPYB_GPIO, (DS101_GPIO_IN|IRQT_FALLING));
+	set_irq_type(DS101_USBCOPYB_IRQ, IRQT_FALLING);
+	set_irq_type(DS101_POWERB_IRQ, IRQT_FALLING);
+	set_irq_type(DS101_RESETB_IRQ, IRQT_FALLING);
+	if (request_irq(DS101_USBCOPYB_IRQ, &ds101_usbcopy_handler, SA_INTERRUPT,
+		"DS101 USBCopy button", NULL) < 0)
+	{
+		printk(KERN_DEBUG "Could not get USBCopy button IRQ (%d)\n",
+				DS101_USBCOPYB_IRQ);
+
+		return -EIO;
+	}
+
+	if (request_irq(DS101_POWERB_IRQ, &ds101_power_handler, SA_INTERRUPT,
+		"DS101 Powerbutton", NULL) < 0)
+	{
+		printk(KERN_DEBUG "Could not get powerbutton IRQ (%d)\n",
+				DS101_POWERB_IRQ);
+		return -EIO;
+	}
+
+	if (request_irq(DS101_RESETB_IRQ, &ds101_reset_handler, SA_INTERRUPT,
+		"DS101 Resetbutton", NULL) < 0)
+	{
+		printk(KERN_DEBUG "Could not get resetbutton IRQ (%d)\n",
+				DS101_RESETB_IRQ);
+		return -EIO;
+	}
+	return 0;
+}
+
+static void __exit ds101_buttons_exit(void)
+{
+	if (!(machine_is_ds101()))
+		return;
+
+	disable_irq(DS101_USBCOPYB_IRQ);
+	disable_irq(DS101_POWERB_IRQ);
+	disable_irq(DS101_RESETB_IRQ);
+	free_irq(DS101_USBCOPYB_IRQ, NULL);
+	free_irq(DS101_POWERB_IRQ, NULL);
+	free_irq(DS101_RESETB_IRQ, NULL);
+}
+
+module_init(ds101_buttons_init);
+module_exit(ds101_buttons_exit);
+
+MODULE_AUTHOR("OEyvind Repvik <nail@nslu2-linux.org>");
+MODULE_DESCRIPTION("DS101 Button driver");
+MODULE_LICENSE("GPL");