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leds-mainstone.c

/*
 * linux/arch/arm/mach-pxa/leds-mainstone.c
 *
 * Author:     Nicolas Pitre
 * Created:    Nov 05, 2002
 * Copyright:  MontaVista Software Inc.
 *
 * 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.
 */

#include <linux/init.h>

#include <mach/hardware.h>
#include <asm/leds.h>
#include <asm/system.h>

#include <mach/pxa27x.h>
#include <mach/mainstone.h>

#include "leds.h"


/* 8 discrete leds available for general use: */
#define D28             (1 << 0)
#define D27             (1 << 1)
#define D26             (1 << 2)
#define D25             (1 << 3)
#define D24             (1 << 4)
#define D23             (1 << 5)
#define D22             (1 << 6)
#define D21             (1 << 7)

#define LED_STATE_ENABLED     1
#define LED_STATE_CLAIMED     2

static unsigned int led_state;
static unsigned int hw_led_state;

void mainstone_leds_event(led_event_t evt)
{
      unsigned long flags;

      local_irq_save(flags);

      switch (evt) {
      case led_start:
            hw_led_state = 0;
            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 = 0;
            break;

      case led_release:
            led_state &= ~LED_STATE_CLAIMED;
            hw_led_state = 0;
            break;

#ifdef CONFIG_LEDS_TIMER
      case led_timer:
            hw_led_state ^= D26;
            break;
#endif

#ifdef CONFIG_LEDS_CPU
      case led_idle_start:
            hw_led_state &= ~D27;
            break;

      case led_idle_end:
            hw_led_state |= D27;
            break;
#endif

      case led_halted:
            break;

      case led_green_on:
            hw_led_state |= D21;
            break;

      case led_green_off:
            hw_led_state &= ~D21;
            break;

      case led_amber_on:
            hw_led_state |= D22;
            break;

      case led_amber_off:
            hw_led_state &= ~D22;
            break;

      case led_red_on:
            hw_led_state |= D23;
            break;

      case led_red_off:
            hw_led_state &= ~D23;
            break;

      default:
            break;
      }

      if  (led_state & LED_STATE_ENABLED)
            MST_LEDCTRL = (MST_LEDCTRL | 0xff) & ~hw_led_state;
      else
            MST_LEDCTRL |= 0xff;

      local_irq_restore(flags);
}

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