LXR linux/arch/arm/mach-pxa/leds-lubbock.c

   1/*
   2 * linux/arch/arm/mach-pxa/leds-lubbock.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 * Major surgery on April 2004 by Nicolas Pitre for less global
  11 * namespace collision.  Mostly adapted the Mainstone version.
  12 */
  13
  14#include <linux/init.h>
  15
  16#include <mach/hardware.h>
  17#include <asm/leds.h>
  18#include <mach/pxa25x.h>
  19#include <mach/lubbock.h>
  20
  21#include "leds.h"
  22
  23/*
  24 * 8 discrete leds available for general use:
  25 *
  26 * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays
  27 * so be sure to not monkey with them here.
  28 */
  29
  30#define D28                     (1 << 0)
  31#define D27                     (1 << 1)
  32#define D26                     (1 << 2)
  33#define D25                     (1 << 3)
  34#define D24                     (1 << 4)
  35#define D23                     (1 << 5)
  36#define D22                     (1 << 6)
  37#define D21                     (1 << 7)
  38
  39#define LED_STATE_ENABLED       1
  40#define LED_STATE_CLAIMED       2
  41
  42static unsigned int led_state;
  43static unsigned int hw_led_state;
  44
  45void lubbock_leds_event(led_event_t evt)
  46{
  47        unsigned long flags;
  48
  49        local_irq_save(flags);
  50
  51        switch (evt) {
  52        case led_start:
  53                hw_led_state = 0;
  54                led_state = LED_STATE_ENABLED;
  55                break;
  56
  57        case led_stop:
  58                led_state &= ~LED_STATE_ENABLED;
  59                break;
  60
  61        case led_claim:
  62                led_state |= LED_STATE_CLAIMED;
  63                hw_led_state = 0;
  64                break;
  65
  66        case led_release:
  67                led_state &= ~LED_STATE_CLAIMED;
  68                hw_led_state = 0;
  69                break;
  70
  71#ifdef CONFIG_LEDS_TIMER
  72        case led_timer:
  73                hw_led_state ^= D26;
  74                break;
  75#endif
  76
  77#ifdef CONFIG_LEDS_CPU
  78        case led_idle_start:
  79                hw_led_state &= ~D27;
  80                break;
  81
  82        case led_idle_end:
  83                hw_led_state |= D27;
  84                break;
  85#endif
  86
  87        case led_halted:
  88                break;
  89
  90        case led_green_on:
  91                hw_led_state |= D21;
  92                break;
  93
  94        case led_green_off:
  95                hw_led_state &= ~D21;
  96                break;
  97
  98        case led_amber_on:
  99                hw_led_state |= D22;
 100                break;
 101
 102        case led_amber_off:
 103                hw_led_state &= ~D22;
 104                break;
 105
 106        case led_red_on:
 107                hw_led_state |= D23;
 108                break;
 109
 110        case led_red_off:
 111                hw_led_state &= ~D23;
 112                break;
 113
 114        default:
 115                break;
 116        }
 117
 118        if  (led_state & LED_STATE_ENABLED)
 119                LUB_DISC_BLNK_LED = (LUB_DISC_BLNK_LED | 0xff) & ~hw_led_state;
 120        else
 121                LUB_DISC_BLNK_LED |= 0xff;
 122
 123        local_irq_restore(flags);
 124}
 125