112 строки
2.7 KiB
C
112 строки
2.7 KiB
C
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/*
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* linux/arch/arm/mach-sa1100/leds-badge4.c
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*
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* Author: Christopher Hoover <ch@hpl.hp.com>
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* Copyright (C) 2002 Hewlett-Packard Company
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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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 "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 LED_RED GPIO_GPIO(7)
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#define LED_GREEN GPIO_GPIO(9)
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#define LED_MASK (LED_RED|LED_GREEN)
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#define LED_IDLE LED_GREEN
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#define LED_TIMER LED_RED
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void badge4_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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GPDR |= LED_MASK;
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hw_led_state = LED_MASK;
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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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break;
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case led_claim:
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led_state |= LED_STATE_CLAIMED;
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hw_led_state = LED_MASK;
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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 = LED_MASK;
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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 ^= LED_TIMER;
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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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/* LED off when system is idle */
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if (!(led_state & LED_STATE_CLAIMED))
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hw_led_state &= ~LED_IDLE;
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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 |= LED_IDLE;
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break;
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#endif
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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 &= ~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 |= LED_RED;
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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 &= ~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 |= LED_GREEN;
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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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GPSR = hw_led_state;
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GPCR = hw_led_state ^ LED_MASK;
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}
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local_irq_restore(flags);
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}
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