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   1 /*
   2  * linux/arch/arm/mach-pxa/leds-trizeps4.c
   3  *
   4  *  Author:     Jürgen Schindele
   5  *  Created:    20 02, 2006
   6  *  Copyright:  Jürgen Schindele
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/init.h>
  14
  15 #include <asm/hardware.h>
  16 #include <asm/system.h>
  17 #include <asm/types.h>
  18 #include <asm/leds.h>
  19
  20 #include <asm/arch/pxa-regs.h>
  21 #include <asm/arch/pxa2xx-gpio.h>
  22 #include <asm/arch/trizeps4.h>
  23
  24 #include "leds.h"
  25
  26 #define LED_STATE_ENABLED       1
  27 #define LED_STATE_CLAIMED       2
  28
  29 #define SYS_BUSY                0x01
  30 #define HEARTBEAT               0x02
  31 #define BLINK                   0x04
  32
  33 static unsigned int led_state;
  34 static unsigned int hw_led_state;
  35
  36 void trizeps4_leds_event(led_event_t evt)
  37 {
  38         unsigned long flags;
  39
  40         local_irq_save(flags);
  41
  42         switch (evt) {
  43         case led_start:
  44                 hw_led_state = 0;
  45                 pxa_gpio_mode( GPIO_SYS_BUSY_LED  | GPIO_OUT);          /* LED1 */
  46                 pxa_gpio_mode( GPIO_HEARTBEAT_LED | GPIO_OUT);          /* LED2 */
  47                 led_state = LED_STATE_ENABLED;
  48                 break;
  49
  50         case led_stop:
  51                 led_state &= ~LED_STATE_ENABLED;
  52                 break;
  53
  54         case led_claim:
  55                 led_state |= LED_STATE_CLAIMED;
  56                 hw_led_state = 0;
  57                 break;
  58
  59         case led_release:
  60                 led_state &= ~LED_STATE_CLAIMED;
  61                 hw_led_state = 0;
  62                 break;
  63
  64 #ifdef CONFIG_LEDS_TIMER
  65         case led_timer:
  66                 hw_led_state ^= HEARTBEAT;
  67                 break;
  68 #endif
  69
  70 #ifdef CONFIG_LEDS_CPU
  71         case led_idle_start:
  72                 hw_led_state &= ~SYS_BUSY;
  73                 break;
  74
  75         case led_idle_end:
  76                 hw_led_state |= SYS_BUSY;
  77                 break;
  78 #endif
  79
  80         case led_halted:
  81                 break;
  82
  83         case led_green_on:
  84                 hw_led_state |= BLINK;
  85                 break;
  86
  87         case led_green_off:
  88                 hw_led_state &= ~BLINK;
  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                 break;
  99
 100         case led_red_off:
 101                 break;
 102
 103         default:
 104                 break;
 105         }
 106
 107         if  (led_state & LED_STATE_ENABLED) {
 108                 switch (hw_led_state) {
 109                         case 0:
 110                                 GPSR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
 111                                 GPSR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
 112                                 break;
 113                         case 1:
 114                                 GPCR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
 115                                 GPSR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
 116                                 break;
 117                         case 2:
 118                                 GPSR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
 119                                 GPCR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
 120                                 break;
 121                         case 3:
 122                                 GPCR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
 123                                 GPCR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
 124                                 break;
 125                 }
 126         }
 127         else {
 128                 /* turn all off */
 129                 GPSR(GPIO_SYS_BUSY_LED)  |= GPIO_bit(GPIO_SYS_BUSY_LED);
 130                 GPSR(GPIO_HEARTBEAT_LED) |= GPIO_bit(GPIO_HEARTBEAT_LED);
 131         }
 132
 133         local_irq_restore(flags);
 134 }