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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/config.h>
  16 #include <linux/init.h>
  17
  18 #include <asm/hardware.h>
  19 #include <asm/leds.h>
  20 #include <asm/system.h>
  21
  22 #include <asm/arch/pxa-regs.h>
  23 #include <asm/arch/idp.h>
  24
  25 #include "leds.h"
  26
  27 #define LED_STATE_ENABLED       1
  28 #define LED_STATE_CLAIMED       2
  29
  30 static unsigned int led_state;
  31 static unsigned int hw_led_state;
  32
  33 void idp_leds_event(led_event_t evt)
  34 {
  35         unsigned long flags;
  36
  37         local_irq_save(flags);
  38
  39         switch (evt) {
  40         case led_start:
  41                 hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  42                 led_state = LED_STATE_ENABLED;
  43                 break;
  44
  45         case led_stop:
  46                 led_state &= ~LED_STATE_ENABLED;
  47                 break;
  48
  49         case led_claim:
  50                 led_state |= LED_STATE_CLAIMED;
  51                 hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  52                 break;
  53
  54         case led_release:
  55                 led_state &= ~LED_STATE_CLAIMED;
  56                 hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
  57                 break;
  58
  59 #ifdef CONFIG_LEDS_TIMER
  60         case led_timer:
  61                 if (!(led_state & LED_STATE_CLAIMED))
  62                         hw_led_state ^= IDP_HB_LED;
  63                 break;
  64 #endif
  65
  66 #ifdef CONFIG_LEDS_CPU
  67         case led_idle_start:
  68                 if (!(led_state & LED_STATE_CLAIMED))
  69                         hw_led_state &= ~IDP_BUSY_LED;
  70                 break;
  71
  72         case led_idle_end:
  73                 if (!(led_state & LED_STATE_CLAIMED))
  74                         hw_led_state |= IDP_BUSY_LED;
  75                 break;
  76 #endif
  77
  78         case led_halted:
  79                 break;
  80
  81         case led_green_on:
  82                 if (led_state & LED_STATE_CLAIMED)
  83                         hw_led_state |= IDP_HB_LED;
  84                 break;
  85
  86         case led_green_off:
  87                 if (led_state & LED_STATE_CLAIMED)
  88                         hw_led_state &= ~IDP_HB_LED;
  89                 break;
  90
  91         case led_amber_on:
  92                 break;
  93
  94         case led_amber_off:
  95                 break;
  96
  97         case led_red_on:
  98                 if (led_state & LED_STATE_CLAIMED)
  99                         hw_led_state |= IDP_BUSY_LED;
 100                 break;
 101
 102         case led_red_off:
 103                 if (led_state & LED_STATE_CLAIMED)
 104                         hw_led_state &= ~IDP_BUSY_LED;
 105                 break;
 106
 107         default:
 108                 break;
 109         }
 110
 111         if  (led_state & LED_STATE_ENABLED)
 112                 IDP_CPLD_LED_CONTROL = ( (IDP_CPLD_LED_CONTROL | IDP_LEDS_MASK) & ~hw_led_state);
 113         else
 114                 IDP_CPLD_LED_CONTROL |= IDP_LEDS_MASK;
 115
 116         local_irq_restore(flags);
 117 }