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   1 /*
   2  * linux/arch/arm/mach-pxa/leds-idp.c
   3  *
   4  * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
   5  *
   6  * Copyright (c) 2001 Jeff Sutherland <jeffs@accelent.com>
   7  *
   8  * Original (leds-footbridge.c) by Russell King
   9  *
  10  * Macros for actual LED manipulation should be in machine specific
  11  * files in this 'mach' directory.
  12  */
  13
  14
  15 #include <linux/init.h>
  16
  17 #include <asm/hardware.h>
  18 #include <asm/leds.h>
  19 #include <asm/system.h>
  20
  21 #include <asm/arch/pxa-regs.h>
  22 #include <asm/arch/idp.h>
  23
  24 #include "leds.h"
  25
  26 #define LED_STATE_ENABLED       1
  27 #define LED_STATE_CLAIMED       2
  28
  29 static unsigned int led_state;
  30 static unsigned int hw_led_state;
  31
  32 void idp_leds_event(led_event_t evt)
  33 {
  34         unsigned long flags;
  35
  36         local_irq_save(flags);
  37
  38         switch (evt) {
  39         case led_start:
  40                 hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  41                 led_state = LED_STATE_ENABLED;
  42                 break;
  43
  44         case led_stop:
  45                 led_state &= ~LED_STATE_ENABLED;
  46                 break;
  47
  48         case led_claim:
  49                 led_state |= LED_STATE_CLAIMED;
  50                 hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  51                 break;
  52
  53         case led_release:
  54                 led_state &= ~LED_STATE_CLAIMED;
  55                 hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  56                 break;
  57
  58 #ifdef CONFIG_LEDS_TIMER
  59         case led_timer:
  60                 if (!(led_state & LED_STATE_CLAIMED))
  61                         hw_led_state ^= IDP_HB_LED;
  62                 break;
  63 #endif
  64
  65 #ifdef CONFIG_LEDS_CPU
  66         case led_idle_start:
  67                 if (!(led_state & LED_STATE_CLAIMED))
  68                         hw_led_state &= ~IDP_BUSY_LED;
  69                 break;
  70
  71         case led_idle_end:
  72                 if (!(led_state & LED_STATE_CLAIMED))
  73                         hw_led_state |= IDP_BUSY_LED;
  74                 break;
  75 #endif
  76
  77         case led_halted:
  78                 break;
  79
  80         case led_green_on:
  81                 if (led_state & LED_STATE_CLAIMED)
  82                         hw_led_state |= IDP_HB_LED;
  83                 break;
  84
  85         case led_green_off:
  86                 if (led_state & LED_STATE_CLAIMED)
  87                         hw_led_state &= ~IDP_HB_LED;
  88                 break;
  89
  90         case led_amber_on:
  91                 break;
  92
  93         case led_amber_off:
  94                 break;
  95
  96         case led_red_on:
  97                 if (led_state & LED_STATE_CLAIMED)
  98                         hw_led_state |= IDP_BUSY_LED;
  99                 break;
 100
 101         case led_red_off:
 102                 if (led_state & LED_STATE_CLAIMED)
 103                         hw_led_state &= ~IDP_BUSY_LED;
 104                 break;
 105
 106         default:
 107                 break;
 108         }
 109
 110         if  (led_state & LED_STATE_ENABLED)
 111                 IDP_CPLD_LED_CONTROL = ( (IDP_CPLD_LED_CONTROL | IDP_LEDS_MASK) & ~hw_led_state);
 112         else
 113                 IDP_CPLD_LED_CONTROL |= IDP_LEDS_MASK;
 114
 115         local_irq_restore(flags);
 116 }