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 <asm/system.h> 19#include <mach/pxa25x.h> 20#include <mach/lubbock.h> 21 22#include "leds.h" 23 24/* 25 * 8 discrete leds available for general use: 26 * 27 * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays 28 * so be sure to not monkey with them here. 29 */ 30 31#define D28 (1 << 0) 32#define D27 (1 << 1) 33#define D26 (1 << 2) 34#define D25 (1 << 3) 35#define D24 (1 << 4) 36#define D23 (1 << 5) 37#define D22 (1 << 6) 38#define D21 (1 << 7) 39 40#define LED_STATE_ENABLED 1 41#define LED_STATE_CLAIMED 2 42 43static unsigned int led_state; 44static unsigned int hw_led_state; 45 46void lubbock_leds_event(led_event_t evt) 47{ 48 unsigned long flags; 49 50 local_irq_save(flags); 51 52 switch (evt) { 53 case led_start: 54 hw_led_state = 0; 55 led_state = LED_STATE_ENABLED; 56 break; 57 58 case led_stop: 59 led_state &= ~LED_STATE_ENABLED; 60 break; 61 62 case led_claim: 63 led_state |= LED_STATE_CLAIMED; 64 hw_led_state = 0; 65 break; 66 67 case led_release: 68 led_state &= ~LED_STATE_CLAIMED; 69 hw_led_state = 0; 70 break; 71 72#ifdef CONFIG_LEDS_TIMER 73 case led_timer: 74 hw_led_state ^= D26; 75 break; 76#endif 77 78#ifdef CONFIG_LEDS_CPU 79 case led_idle_start: 80 hw_led_state &= ~D27; 81 break; 82 83 case led_idle_end: 84 hw_led_state |= D27; 85 break; 86#endif 87 88 case led_halted: 89 break; 90 91 case led_green_on: 92 hw_led_state |= D21; 93 break; 94 95 case led_green_off: 96 hw_led_state &= ~D21; 97 break; 98 99 case led_amber_on: 100 hw_led_state |= D22; 101 break; 102 103 case led_amber_off: 104 hw_led_state &= ~D22; 105 break; 106 107 case led_red_on: 108 hw_led_state |= D23; 109 break; 110 111 case led_red_off: 112 hw_led_state &= ~D23; 113 break; 114 115 default: 116 break; 117 } 118 119 if (led_state & LED_STATE_ENABLED) 120 LUB_DISC_BLNK_LED = (LUB_DISC_BLNK_LED | 0xff) & ~hw_led_state; 121 else 122 LUB_DISC_BLNK_LED |= 0xff; 123 124 local_irq_restore(flags); 125} 126