1 files changed, 141 insertions, 0 deletions

diff --git a/arch/arm/mach-footbridge/netwinder-leds.c b/arch/arm/mach-footbridge/netwinder-leds.c
new file mode 100644
index 000000000000..7451fc07b85a
--- /dev/null
+++ b/arch/arm/mach-footbridge/netwinder-leds.c
@@ -0,0 +1,141 @@
+/*
+ *  linux/arch/arm/mach-footbridge/netwinder-leds.c
+ *
+ *  Copyright (C) 1998-1999 Russell King
+ *
+ * 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.
+ *
+ * NetWinder LED control routines.
+ *
+ * The Netwinder uses the leds as follows:
+ *  - Green - toggles state every 50 timer interrupts
+ *  - Red   - On if the system is not idle
+ *
+ * Changelog:
+ *   02-05-1999 RMK     Various cleanups
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/mach-types.h>
+#include <asm/system.h>
+
+#define LED_STATE_ENABLED       1
+#define LED_STATE_CLAIMED       2
+static char led_state;
+static char hw_led_state;
+
+static DEFINE_SPINLOCK(leds_lock);
+extern spinlock_t gpio_lock;
+
+static void netwinder_leds_event(led_event_t evt)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&leds_lock, flags);
+
+        switch (evt) {
+        case led_start:
+                led_state |= LED_STATE_ENABLED;
+                hw_led_state = GPIO_GREEN_LED;
+                break;
+
+        case led_stop:
+                led_state &= ~LED_STATE_ENABLED;
+                break;
+
+        case led_claim:
+                led_state |= LED_STATE_CLAIMED;
+                hw_led_state = 0;
+                break;
+
+        case led_release:
+                led_state &= ~LED_STATE_CLAIMED;
+                hw_led_state = 0;
+                break;
+
+#ifdef CONFIG_LEDS_TIMER
+        case led_timer:
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state ^= GPIO_GREEN_LED;
+                break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+        case led_idle_start:
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state &= ~GPIO_RED_LED;
+                break;
+
+        case led_idle_end:
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state |= GPIO_RED_LED;
+                break;
+#endif
+
+        case led_halted:
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state |= GPIO_RED_LED;
+                break;
+
+        case led_green_on:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state |= GPIO_GREEN_LED;
+                break;
+
+        case led_green_off:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state &= ~GPIO_GREEN_LED;
+                break;
+
+        case led_amber_on:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state |= GPIO_GREEN_LED | GPIO_RED_LED;
+                break;
+
+        case led_amber_off:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state &= ~(GPIO_GREEN_LED | GPIO_RED_LED);
+                break;
+
+        case led_red_on:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state |= GPIO_RED_LED;
+                break;
+
+        case led_red_off:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state &= ~GPIO_RED_LED;
+                break;
+
+        default:
+                break;
+        }
+
+        spin_unlock_irqrestore(&leds_lock, flags);
+
+        if  (led_state & LED_STATE_ENABLED) {
+                spin_lock_irqsave(&gpio_lock, flags);
+                gpio_modify_op(GPIO_RED_LED | GPIO_GREEN_LED, hw_led_state);
+                spin_unlock_irqrestore(&gpio_lock, flags);
+        }
+}
+
+static int __init leds_init(void)
+{
+        if (machine_is_netwinder())
+                leds_event = netwinder_leds_event;
+
+        leds_event(led_start);
+
+        return 0;
+}
+
+__initcall(leds_init);