Eric Lee / smarc-fsl-linux-kernel

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arch/arm/mach-pxa/leds-mainstone.c 1.98 KB
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1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  /*
   * 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.
   */
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  #include <linux/init.h>
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  #include <mach/hardware.h>
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  #include <asm/leds.h>
  #include <asm/system.h>
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  #include <mach/pxa27x.h>
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  #include <mach/mainstone.h>
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  #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:
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  		hw_led_state |= D21;
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  		break;
  
  	case led_green_off:
  		hw_led_state &= ~D21;
  		break;
  
  	case led_amber_on:
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  		hw_led_state |= D22;
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  		break;
  
  	case led_amber_off:
  		hw_led_state &= ~D22;
  		break;
  
  	case led_red_on:
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  		hw_led_state |= D23;
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  		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);
  }