140 lines
2.8 KiB
C
140 lines
2.8 KiB
C
|
/*
|
||
|
|
* linux/arch/arm/mach-footbridge/ebsa285-leds.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 1998-1999 Russell King
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
* EBSA-285 control routines.
|
||
|
|
*
|
||
|
|
* The EBSA-285 uses the leds as follows:
|
||
|
|
* - Green - toggles state every 50 timer interrupts
|
||
|
|
* - Amber - On if system is not idle
|
||
|
|
* - Red - currently unused
|
||
|
|
*
|
||
|
|
* Changelog:
|
||
|
|
* 02-05-1999 RMK Various cleanups
|
||
|
|
*/
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
|
||
|
|
#include <mach/hardware.h>
|
||
|
|
#include <asm/leds.h>
|
||
|
|
#include <asm/mach-types.h>
|
||
|
|
#include <asm/system.h>
|
||
|
|
|
||
|
|
#define LED_STATE_ENABLED 1
|
||
|
|
#define LED_STATE_CLAIMED 2
|
||
|
|
static char led_state;
|
||
|
|
static char hw_led_state;
|
||
|
|
|
||
|
|
static DEFINE_SPINLOCK(leds_lock);
|
||
|
|
|
||
|
|
static void ebsa285_leds_event(led_event_t evt)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&leds_lock, flags);
|
||
|
|
|
||
|
|
switch (evt) {
|
||
|
|
case led_start:
|
||
|
|
hw_led_state = XBUS_LED_RED | XBUS_LED_GREEN;
|
||
|
|
#ifndef CONFIG_LEDS_CPU
|
||
|
|
hw_led_state |= XBUS_LED_AMBER;
|
||
|
|
#endif
|
||
|
|
led_state |= LED_STATE_ENABLED;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_stop:
|
||
|
|
led_state &= ~LED_STATE_ENABLED;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_claim:
|
||
|
|
led_state |= LED_STATE_CLAIMED;
|
||
|
|
hw_led_state = XBUS_LED_RED | XBUS_LED_GREEN | XBUS_LED_AMBER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_release:
|
||
|
|
led_state &= ~LED_STATE_CLAIMED;
|
||
|
|
hw_led_state = XBUS_LED_RED | XBUS_LED_GREEN | XBUS_LED_AMBER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
#ifdef CONFIG_LEDS_TIMER
|
||
|
|
case led_timer:
|
||
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
||
|
|
hw_led_state ^= XBUS_LED_GREEN;
|
||
|
|
break;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef CONFIG_LEDS_CPU
|
||
|
|
case led_idle_start:
|
||
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
||
|
|
hw_led_state |= XBUS_LED_AMBER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_idle_end:
|
||
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
||
|
|
hw_led_state &= ~XBUS_LED_AMBER;
|
||
|
|
break;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
case led_halted:
|
||
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
||
|
|
hw_led_state &= ~XBUS_LED_RED;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_green_on:
|
||
|
|
if (led_state & LED_STATE_CLAIMED)
|
||
|
|
hw_led_state &= ~XBUS_LED_GREEN;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_green_off:
|
||
|
|
if (led_state & LED_STATE_CLAIMED)
|
||
|
|
hw_led_state |= XBUS_LED_GREEN;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_amber_on:
|
||
|
|
if (led_state & LED_STATE_CLAIMED)
|
||
|
|
hw_led_state &= ~XBUS_LED_AMBER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_amber_off:
|
||
|
|
if (led_state & LED_STATE_CLAIMED)
|
||
|
|
hw_led_state |= XBUS_LED_AMBER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_red_on:
|
||
|
|
if (led_state & LED_STATE_CLAIMED)
|
||
|
|
hw_led_state &= ~XBUS_LED_RED;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case led_red_off:
|
||
|
|
if (led_state & LED_STATE_CLAIMED)
|
||
|
|
hw_led_state |= XBUS_LED_RED;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (led_state & LED_STATE_ENABLED)
|
||
|
|
*XBUS_LEDS = hw_led_state;
|
||
|
|
|
||
|
|
spin_unlock_irqrestore(&leds_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init leds_init(void)
|
||
|
|
{
|
||
|
|
if (machine_is_ebsa285())
|
||
|
|
leds_event = ebsa285_leds_event;
|
||
|
|
|
||
|
|
leds_event(led_start);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
__initcall(leds_init);
|