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Diffstat (limited to 'arch/arm/mach-sa1100/leds-assabet.c')
-rw-r--r--arch/arm/mach-sa1100/leds-assabet.c115
1 files changed, 115 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/leds-assabet.c b/arch/arm/mach-sa1100/leds-assabet.c
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+++ b/arch/arm/mach-sa1100/leds-assabet.c
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+/*
+ * linux/arch/arm/mach-sa1100/leds-assabet.c
+ *
+ * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
+ *
+ * Original (leds-footbridge.c) by Russell King
+ *
+ * Assabet uses the LEDs as follows:
+ * - Green - toggles state every 50 timer interrupts
+ * - Red - on if system is not idle
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/system.h>
+#include <asm/arch/assabet.h>
+
+#include "leds.h"
+
+
+#define LED_STATE_ENABLED 1
+#define LED_STATE_CLAIMED 2
+
+static unsigned int led_state;
+static unsigned int hw_led_state;
+
+#define ASSABET_BCR_LED_MASK (ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED)
+
+void assabet_leds_event(led_event_t evt)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ switch (evt) {
+ case led_start:
+ hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
+ led_state = LED_STATE_ENABLED;
+ break;
+
+ case led_stop:
+ led_state &= ~LED_STATE_ENABLED;
+ hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
+ ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state);
+ break;
+
+ case led_claim:
+ led_state |= LED_STATE_CLAIMED;
+ hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
+ break;
+
+ case led_release:
+ led_state &= ~LED_STATE_CLAIMED;
+ hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
+ break;
+
+#ifdef CONFIG_LEDS_TIMER
+ case led_timer:
+ if (!(led_state & LED_STATE_CLAIMED))
+ hw_led_state ^= ASSABET_BCR_LED_GREEN;
+ break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+ case led_idle_start:
+ if (!(led_state & LED_STATE_CLAIMED))
+ hw_led_state |= ASSABET_BCR_LED_RED;
+ break;
+
+ case led_idle_end:
+ if (!(led_state & LED_STATE_CLAIMED))
+ hw_led_state &= ~ASSABET_BCR_LED_RED;
+ break;
+#endif
+
+ case led_halted:
+ break;
+
+ case led_green_on:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state &= ~ASSABET_BCR_LED_GREEN;
+ break;
+
+ case led_green_off:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state |= ASSABET_BCR_LED_GREEN;
+ break;
+
+ case led_amber_on:
+ break;
+
+ case led_amber_off:
+ break;
+
+ case led_red_on:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state &= ~ASSABET_BCR_LED_RED;
+ break;
+
+ case led_red_off:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state |= ASSABET_BCR_LED_RED;
+ break;
+
+ default:
+ break;
+ }
+
+ if (led_state & LED_STATE_ENABLED)
+ ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state);
+
+ local_irq_restore(flags);
+}