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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/init.h>
#include <mach/hardware.h>
#include <asm/leds.h>
#include <asm/system.h>
#include <mach/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);
}
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