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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");
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