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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/mach-shark/leds.c
downloadconfigs-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/mach-shark/leds.c')
-rw-r--r--arch/arm/mach-shark/leds.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/arch/arm/mach-shark/leds.c b/arch/arm/mach-shark/leds.c
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index 00000000000..7bdeb70a0c1
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+++ b/arch/arm/mach-shark/leds.c
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+/*
+ * 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);