arch/arm/mach-pxa/leds-mainstone.c

   1 /*
   2  * linux/arch/arm/mach-pxa/leds-mainstone.c
   3  *
   4  * Author:     Nicolas Pitre
   5  * Created:    Nov 05, 2002
   6  * Copyright:  MontaVista Software Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/config.h>
  14 #include <linux/init.h>
  15
  16 #include <asm/hardware.h>
  17 #include <asm/leds.h>
  18 #include <asm/system.h>
  19
  20 #include "leds.h"
  21
  22
  23 /* 8 discrete leds available for general use: */
  24 #define D28                     (1 << 0)
  25 #define D27                     (1 << 1)
  26 #define D26                     (1 << 2)
  27 #define D25                     (1 << 3)
  28 #define D24                     (1 << 4)
  29 #define D23                     (1 << 5)
  30 #define D22                     (1 << 6)
  31 #define D21                     (1 << 7)
  32
  33 #define LED_STATE_ENABLED       1
  34 #define LED_STATE_CLAIMED       2
  35
  36 static unsigned int led_state;
  37 static unsigned int hw_led_state;
  38
  39 void mainstone_leds_event(led_event_t evt)
  40 {
  41         unsigned long flags;
  42
  43         local_irq_save(flags);
  44
  45         switch (evt) {
  46         case led_start:
  47                 hw_led_state = 0;
  48                 led_state = LED_STATE_ENABLED;
  49                 break;
  50
  51         case led_stop:
  52                 led_state &= ~LED_STATE_ENABLED;
  53                 break;
  54
  55         case led_claim:
  56                 led_state |= LED_STATE_CLAIMED;
  57                 hw_led_state = 0;
  58                 break;
  59
  60         case led_release:
  61                 led_state &= ~LED_STATE_CLAIMED;
  62                 hw_led_state = 0;
  63                 break;
  64
  65 #ifdef CONFIG_LEDS_TIMER
  66         case led_timer:
  67                 hw_led_state ^= D26;
  68                 break;
  69 #endif
  70
  71 #ifdef CONFIG_LEDS_CPU
  72         case led_idle_start:
  73                 hw_led_state &= ~D27;
  74                 break;
  75
  76         case led_idle_end:
  77                 hw_led_state |= D27;
  78                 break;
  79 #endif
  80
  81         case led_halted:
  82                 break;
  83
  84         case led_green_on:
  85                 hw_led_state |= D21;;
  86                 break;
  87
  88         case led_green_off:
  89                 hw_led_state &= ~D21;
  90                 break;
  91
  92         case led_amber_on:
  93                 hw_led_state |= D22;;
  94                 break;
  95
  96         case led_amber_off:
  97                 hw_led_state &= ~D22;
  98                 break;
  99
 100         case led_red_on:
 101                 hw_led_state |= D23;;
 102                 break;
 103
 104         case led_red_off:
 105                 hw_led_state &= ~D23;
 106                 break;
 107
 108         default:
 109                 break;
 110         }
 111
 112         if  (led_state & LED_STATE_ENABLED)
 113                 MST_LEDCTRL = (MST_LEDCTRL | 0xff) & ~hw_led_state;
 114         else
 115                 MST_LEDCTRL |= 0xff;
 116
 117         local_irq_restore(flags);
 118 }