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   1 /*
   2  * linux/arch/arm/mach-sa1100/leds-cerf.c
   3  *
   4  * Author: ???
   5  */
   6 #include <linux/init.h>
   7
   8 #include <mach/hardware.h>
   9 #include <asm/leds.h>
  10 #include <asm/system.h>
  11
  12 #include "leds.h"
  13
  14
  15 #define LED_STATE_ENABLED       1
  16 #define LED_STATE_CLAIMED       2
  17
  18 static unsigned int led_state;
  19 static unsigned int hw_led_state;
  20
  21 #define LED_D0          GPIO_GPIO(0)
  22 #define LED_D1          GPIO_GPIO(1)
  23 #define LED_D2          GPIO_GPIO(2)
  24 #define LED_D3          GPIO_GPIO(3)
  25 #define LED_MASK        (LED_D0|LED_D1|LED_D2|LED_D3)
  26
  27 void cerf_leds_event(led_event_t evt)
  28 {
  29         unsigned long flags;
  30
  31         local_irq_save(flags);
  32
  33         switch (evt) {
  34         case led_start:
  35                 hw_led_state = LED_MASK;
  36                 led_state = LED_STATE_ENABLED;
  37                 break;
  38
  39         case led_stop:
  40                 led_state &= ~LED_STATE_ENABLED;
  41                 break;
  42
  43         case led_claim:
  44                 led_state |= LED_STATE_CLAIMED;
  45                 hw_led_state = LED_MASK;
  46                 break;
  47         case led_release:
  48                 led_state &= ~LED_STATE_CLAIMED;
  49                 hw_led_state = LED_MASK;
  50                 break;
  51
  52 #ifdef CONFIG_LEDS_TIMER
  53         case led_timer:
  54                 if (!(led_state & LED_STATE_CLAIMED))
  55                         hw_led_state ^= LED_D0;
  56                 break;
  57 #endif
  58
  59 #ifdef CONFIG_LEDS_CPU
  60         case led_idle_start:
  61                 if (!(led_state & LED_STATE_CLAIMED))
  62                         hw_led_state &= ~LED_D1;
  63                 break;
  64
  65         case led_idle_end:
  66                 if (!(led_state & LED_STATE_CLAIMED))
  67                         hw_led_state |= LED_D1;
  68                 break;
  69 #endif
  70         case led_green_on:
  71                 if (!(led_state & LED_STATE_CLAIMED))
  72                         hw_led_state &= ~LED_D2;
  73                 break;
  74
  75         case led_green_off:
  76                 if (!(led_state & LED_STATE_CLAIMED))
  77                         hw_led_state |= LED_D2;
  78                 break;
  79
  80         case led_amber_on:
  81                 if (!(led_state & LED_STATE_CLAIMED))
  82                         hw_led_state &= ~LED_D3;
  83                 break;
  84
  85         case led_amber_off:
  86                 if (!(led_state & LED_STATE_CLAIMED))
  87                         hw_led_state |= LED_D3;
  88                 break;
  89
  90         case led_red_on:
  91                 if (!(led_state & LED_STATE_CLAIMED))
  92                         hw_led_state &= ~LED_D1;
  93                 break;
  94
  95         case led_red_off:
  96                 if (!(led_state & LED_STATE_CLAIMED))
  97                         hw_led_state |= LED_D1;
  98                 break;
  99
 100         default:
 101                 break;
 102         }
 103
 104         if  (led_state & LED_STATE_ENABLED) {
 105                 GPSR = hw_led_state;
 106                 GPCR = hw_led_state ^ LED_MASK;
 107         }
 108
 109         local_irq_restore(flags);
 110 }