Eric Lee / smarc-fsl-linux-kernel

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arch/arm/mach-sa1100/leds-badge4.c 2.71 KB
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1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  /*
   * linux/arch/arm/mach-sa1100/leds-badge4.c
   *
   * Author: Christopher Hoover <ch@hpl.hp.com>
   * Copyright (C) 2002 Hewlett-Packard Company
   *
   * 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.
   *
   */
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  #include <linux/init.h>
a09e64fbc   Russell King   [ARM] Move includ... 
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  #include <mach/hardware.h>
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  #include <asm/leds.h>
  #include <asm/system.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 LED_RED		GPIO_GPIO(7)
  #define LED_GREEN       GPIO_GPIO(9)
  #define LED_MASK	(LED_RED|LED_GREEN)
  
  #define LED_IDLE	LED_GREEN
  #define LED_TIMER	LED_RED
  
  void badge4_leds_event(led_event_t evt)
  {
          unsigned long flags;
  
  	local_irq_save(flags);
  
          switch (evt) {
          case led_start:
  		GPDR |= LED_MASK;
                  hw_led_state = LED_MASK;
                  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 = LED_MASK;
                  break;
  
          case led_release:
                  led_state &= ~LED_STATE_CLAIMED;
                  hw_led_state = LED_MASK;
                  break;
  
  #ifdef CONFIG_LEDS_TIMER
          case led_timer:
                  if (!(led_state & LED_STATE_CLAIMED))
                          hw_led_state ^= LED_TIMER;
                  break;
  #endif
  
  #ifdef CONFIG_LEDS_CPU
          case led_idle_start:
  		/* LED off when system is idle */
                  if (!(led_state & LED_STATE_CLAIMED))
                          hw_led_state &= ~LED_IDLE;
                  break;
  
          case led_idle_end:
                  if (!(led_state & LED_STATE_CLAIMED))
                          hw_led_state |= LED_IDLE;
                  break;
  #endif
  
          case led_red_on:
                  if (!(led_state & LED_STATE_CLAIMED))
                          hw_led_state &= ~LED_RED;
                  break;
  
          case led_red_off:
                  if (!(led_state & LED_STATE_CLAIMED))
                          hw_led_state |= LED_RED;
                  break;
  
          case led_green_on:
                  if (!(led_state & LED_STATE_CLAIMED))
                          hw_led_state &= ~LED_GREEN;
                  break;
  
          case led_green_off:
                  if (!(led_state & LED_STATE_CLAIMED))
                          hw_led_state |= LED_GREEN;
                  break;
  
  	default:
  		break;
          }
  
          if  (led_state & LED_STATE_ENABLED) {
                  GPSR = hw_led_state;
                  GPCR = hw_led_state ^ LED_MASK;
          }
  
  	local_irq_restore(flags);
  }