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   1 /*
   2  * linux/arch/arm/mach-sa1100/leds-simpad.c
   3  *
   4  * Author: Juergen Messerer <juergen.messerer@siemens.ch>
   5  */
   6 #include <linux/config.h>
   7 #include <linux/init.h>
   8
   9 #include <asm/hardware.h>
  10 #include <asm/leds.h>
  11 #include <asm/system.h>
  12 #include <asm/arch/simpad.h>
  13
  14 #include "leds.h"
  15
  16
  17 #define LED_STATE_ENABLED       1
  18 #define LED_STATE_CLAIMED       2
  19
  20 static unsigned int led_state;
  21 static unsigned int hw_led_state;
  22
  23 #define LED_GREEN       (1)
  24 #define LED_MASK        (1)
  25
  26 extern void set_cs3_bit(int value);
  27 extern void clear_cs3_bit(int value);
  28
  29 void simpad_leds_event(led_event_t evt)
  30 {
  31         switch (evt)
  32         {
  33         case led_start:
  34                 hw_led_state = LED_GREEN;
  35                 led_state = LED_STATE_ENABLED;
  36                 break;
  37
  38         case led_stop:
  39                 led_state &= ~LED_STATE_ENABLED;
  40                 break;
  41
  42         case led_claim:
  43                 led_state |= LED_STATE_CLAIMED;
  44                 hw_led_state = LED_GREEN;
  45                 break;
  46
  47         case led_release:
  48                 led_state &= ~LED_STATE_CLAIMED;
  49                 hw_led_state = LED_GREEN;
  50                 break;
  51
  52 #ifdef CONFIG_LEDS_TIMER
  53         case led_timer:
  54                 if (!(led_state & LED_STATE_CLAIMED))
  55                         hw_led_state ^= LED_GREEN;
  56                 break;
  57 #endif
  58
  59 #ifdef CONFIG_LEDS_CPU
  60         case led_idle_start:
  61                 break;
  62
  63         case led_idle_end:
  64                 break;
  65 #endif
  66
  67         case led_halted:
  68                 break;
  69
  70         case led_green_on:
  71                 if (led_state & LED_STATE_CLAIMED)
  72                         hw_led_state |= LED_GREEN;
  73                 break;
  74
  75         case led_green_off:
  76                 if (led_state & LED_STATE_CLAIMED)
  77                         hw_led_state &= ~LED_GREEN;
  78                 break;
  79
  80         case led_amber_on:
  81                 break;
  82
  83         case led_amber_off:
  84                 break;
  85
  86         case led_red_on:
  87                 break;
  88
  89         case led_red_off:
  90                 break;
  91
  92         default:
  93                 break;
  94         }
  95
  96         if  (led_state & LED_STATE_ENABLED)
  97                 set_cs3_bit(LED2_ON);
  98         else
  99                 clear_cs3_bit(LED2_ON);
 100 }
 101