arch/arm/mach-sa1100/leds-adsbitsyplus.c

   1 /*
   2  *  linux/arch/arm/mach-sa1100/leds-adsbitsy.c
   3  *
   4  * ADS Bitsy LED
   5  * 2/7/2003 Robert Whaley
   6  * This file comes from leds-adsbitsy.c of Woojung Huh <whuh@applieddata.net>
   7  */
   8 #include <linux/config.h>
   9 #include <linux/init.h>
  10
  11 #include <asm/hardware.h>
  12 #include <asm/leds.h>
  13 #include <asm/system.h>
  14
  15 #include "leds.h"
  16
  17
  18 #define LED_STATE_ENABLED       1
  19 #define LED_STATE_CLAIMED       2
  20
  21 static unsigned int led_state;
  22 static unsigned int hw_led_state;
  23
  24 #define LED_TIMER       GPIO_GPIO20  /* green heartbeat */
  25
  26 #define LED_MASK                (LED_TIMER)
  27
  28 void adsbitsyplus_leds_event(led_event_t evt)
  29 {
  30         unsigned long flags;
  31
  32         local_irq_save(flags);
  33
  34         switch (evt) {
  35         case led_start:
  36                 hw_led_state = 0;        /* gc leds are positive logic */
  37                 led_state = LED_STATE_ENABLED;
  38                 break;
  39
  40         case led_stop:
  41                 led_state &= ~LED_STATE_ENABLED;
  42                 break;
  43
  44         case led_claim:
  45                 led_state |= LED_STATE_CLAIMED;
  46                 hw_led_state = LED_MASK;
  47                 break;
  48
  49         case led_release:
  50                 led_state &= ~LED_STATE_CLAIMED;
  51                 hw_led_state = LED_MASK;
  52                 break;
  53
  54 #ifdef CONFIG_LEDS_TIMER
  55         case led_timer:
  56                 if (!(led_state & LED_STATE_CLAIMED))
  57                         hw_led_state ^= LED_TIMER;
  58                 break;
  59 #endif
  60
  61 #ifdef CONFIG_LEDS_CPU
  62         case led_idle_start:
  63                 break;
  64
  65         case led_idle_end:
  66                 break;
  67 #endif
  68
  69         case led_green_on:
  70                 break;
  71
  72         case led_green_off:
  73                 break;
  74
  75         case led_amber_on:
  76                 break;
  77
  78         case led_amber_off:
  79                 break;
  80
  81         case led_red_on:
  82                 break;
  83
  84         case led_red_off:
  85                 break;
  86
  87         default:
  88                 break;
  89         }
  90
  91         if  (led_state & LED_STATE_ENABLED) {
  92                 GPSR = hw_led_state;
  93                 GPCR = hw_led_state ^ LED_MASK;
  94         }
  95
  96         local_irq_restore(flags);
  97 }