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/init.h>
  14
  15 #include <mach/hardware.h>
  16 #include <asm/leds.h>
  17
  18 #include <mach/pxa27x.h>
  19 #include <mach/mainstone.h>
  20
  21 #include "leds.h"
  22
  23
  24 /* 8 discrete leds available for general use: */
  25 #define D28                     (1 << 0)
  26 #define D27                     (1 << 1)
  27 #define D26                     (1 << 2)
  28 #define D25                     (1 << 3)
  29 #define D24                     (1 << 4)
  30 #define D23                     (1 << 5)
  31 #define D22                     (1 << 6)
  32 #define D21                     (1 << 7)
  33
  34 #define LED_STATE_ENABLED       1
  35 #define LED_STATE_CLAIMED       2
  36
  37 static unsigned int led_state;
  38 static unsigned int hw_led_state;
  39
  40 void mainstone_leds_event(led_event_t evt)
  41 {
  42         unsigned long flags;
  43
  44         local_irq_save(flags);
  45
  46         switch (evt) {
  47         case led_start:
  48                 hw_led_state = 0;
  49                 led_state = LED_STATE_ENABLED;
  50                 break;
  51
  52         case led_stop:
  53                 led_state &= ~LED_STATE_ENABLED;
  54                 break;
  55
  56         case led_claim:
  57                 led_state |= LED_STATE_CLAIMED;
  58                 hw_led_state = 0;
  59                 break;
  60
  61         case led_release:
  62                 led_state &= ~LED_STATE_CLAIMED;
  63                 hw_led_state = 0;
  64                 break;
  65
  66 #ifdef CONFIG_LEDS_TIMER
  67         case led_timer:
  68                 hw_led_state ^= D26;
  69                 break;
  70 #endif
  71
  72 #ifdef CONFIG_LEDS_CPU
  73         case led_idle_start:
  74                 hw_led_state &= ~D27;
  75                 break;
  76
  77         case led_idle_end:
  78                 hw_led_state |= D27;
  79                 break;
  80 #endif
  81
  82         case led_halted:
  83                 break;
  84
  85         case led_green_on:
  86                 hw_led_state |= D21;
  87                 break;
  88
  89         case led_green_off:
  90                 hw_led_state &= ~D21;
  91                 break;
  92
  93         case led_amber_on:
  94                 hw_led_state |= D22;
  95                 break;
  96
  97         case led_amber_off:
  98                 hw_led_state &= ~D22;
  99                 break;
 100
 101         case led_red_on:
 102                 hw_led_state |= D23;
 103                 break;
 104
 105         case led_red_off:
 106                 hw_led_state &= ~D23;
 107                 break;
 108
 109         default:
 110                 break;
 111         }
 112
 113         if  (led_state & LED_STATE_ENABLED)
 114                 MST_LEDCTRL = (MST_LEDCTRL | 0xff) & ~hw_led_state;
 115         else
 116                 MST_LEDCTRL |= 0xff;
 117
 118         local_irq_restore(flags);
 119 }