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