1 files changed, 163 insertions, 0 deletions

diff --git a/arch/arm/mach-shark/leds.c b/arch/arm/mach-shark/leds.c
new file mode 100644
index 000000000000..7bdeb70a0c10
--- /dev/null
+++ b/arch/arm/mach-shark/leds.c
@@ -0,0 +1,163 @@
+/*
+ * arch/arm/kernel/leds-shark.c
+ * by Alexander Schulz
+ *
+ * derived from:
+ * arch/arm/kernel/leds-footbridge.c
+ * Copyright (C) 1998-1999 Russell King
+ *
+ * DIGITAL Shark LED control routines.
+ *
+ * The leds use is as follows:
+ *  - Green front - toggles state every 50 timer interrupts
+ *  - Amber front - Unused, this is a dual color led (Amber/Green)
+ *  - Amber back  - On if system is not idle
+ *
+ * Changelog:
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/ioport.h>
+
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#define LED_STATE_ENABLED       1
+#define LED_STATE_CLAIMED       2
+static char led_state;
+static short hw_led_state;
+static short saved_state;
+
+static DEFINE_SPINLOCK(leds_lock);
+
+short sequoia_read(int addr) {
+  outw(addr,0x24);
+  return inw(0x26);
+}
+
+void sequoia_write(short value,short addr) {
+  outw(addr,0x24);
+  outw(value,0x26);
+}
+
+static void sequoia_leds_event(led_event_t evt)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&leds_lock, flags);
+
+        hw_led_state = sequoia_read(0x09);
+
+        switch (evt) {
+        case led_start:
+                hw_led_state |= SEQUOIA_LED_GREEN;
+                hw_led_state |= SEQUOIA_LED_AMBER;
+#ifdef CONFIG_LEDS_CPU
+                hw_led_state |= SEQUOIA_LED_BACK;
+#else
+                hw_led_state &= ~SEQUOIA_LED_BACK;
+#endif
+                led_state |= LED_STATE_ENABLED;
+                break;
+
+        case led_stop:
+                hw_led_state &= ~SEQUOIA_LED_BACK;
+                hw_led_state |= SEQUOIA_LED_GREEN;
+                hw_led_state |= SEQUOIA_LED_AMBER;
+                led_state &= ~LED_STATE_ENABLED;
+                break;
+
+        case led_claim:
+                led_state |= LED_STATE_CLAIMED;
+                saved_state = hw_led_state;
+                hw_led_state &= ~SEQUOIA_LED_BACK;
+                hw_led_state |= SEQUOIA_LED_GREEN;
+                hw_led_state |= SEQUOIA_LED_AMBER;
+                break;
+
+        case led_release:
+                led_state &= ~LED_STATE_CLAIMED;
+                hw_led_state = saved_state;
+                break;
+
+#ifdef CONFIG_LEDS_TIMER
+        case led_timer:
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state ^= SEQUOIA_LED_GREEN;
+                break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+        case led_idle_start:
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state &= ~SEQUOIA_LED_BACK;
+                break;
+
+        case led_idle_end:
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state |= SEQUOIA_LED_BACK;
+                break;
+#endif
+
+        case led_green_on:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state &= ~SEQUOIA_LED_GREEN;
+                break;
+
+        case led_green_off:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state |= SEQUOIA_LED_GREEN;
+                break;
+
+        case led_amber_on:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state &= ~SEQUOIA_LED_AMBER;
+                break;
+
+        case led_amber_off:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state |= SEQUOIA_LED_AMBER;
+                break;
+
+        case led_red_on:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state |= SEQUOIA_LED_BACK;
+                break;
+
+        case led_red_off:
+                if (led_state & LED_STATE_CLAIMED)
+                        hw_led_state &= ~SEQUOIA_LED_BACK;
+                break;
+
+        default:
+                break;
+        }
+
+        if  (led_state & LED_STATE_ENABLED)
+                sequoia_write(hw_led_state,0x09);
+
+        spin_unlock_irqrestore(&leds_lock, flags);
+}
+
+static int __init leds_init(void)
+{
+        extern void (*leds_event)(led_event_t);
+        short temp;
+        
+        leds_event = sequoia_leds_event;
+
+        /* Make LEDs independent of power-state */
+        request_region(0x24,4,"sequoia");
+        temp = sequoia_read(0x09);
+        temp |= 1<<10;
+        sequoia_write(temp,0x09);
+        leds_event(led_start);
+        return 0;
+}
+
+__initcall(leds_init);