projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * linux/arch/arm/mach-sa1100/leds-assabet.c | |
| 3 | * | |
| 4 | * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu> | |
| 5 | * | |
| 6 | * Original (leds-footbridge.c) by Russell King | |
| 7 | * | |
| 8 | * Assabet uses the LEDs as follows: | |
| 9 | * - Green - toggles state every 50 timer interrupts | |
| 10 | * - Red - on if system is not idle | |
| 11 | */ | |
| 1da177e4 LT |
12 | #include <linux/init.h> |
| 13 | ||
| a09e64fb | 14 | #include <mach/hardware.h> |
| 1da177e4 | 15 | #include <asm/leds.h> |
| a09e64fb | 16 | #include <mach/assabet.h> |
| 1da177e4 LT |
17 | |
| 18 | #include "leds.h" | |
| 19 | ||
| 20 | ||
| 21 | #define LED_STATE_ENABLED 1 | |
| 22 | #define LED_STATE_CLAIMED 2 | |
| 23 | ||
| 24 | static unsigned int led_state; | |
| 25 | static unsigned int hw_led_state; | |
| 26 | ||
| 27 | #define ASSABET_BCR_LED_MASK (ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED) | |
| 28 | ||
| 29 | void assabet_leds_event(led_event_t evt) | |
| 30 | { | |
| 31 | unsigned long flags; | |
| 32 | ||
| 33 | local_irq_save(flags); | |
| 34 | ||
| 35 | switch (evt) { | |
| 36 | case led_start: | |
| 37 | hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN; | |
| 38 | led_state = LED_STATE_ENABLED; | |
| 39 | break; | |
| 40 | ||
| 41 | case led_stop: | |
| 42 | led_state &= ~LED_STATE_ENABLED; | |
| 43 | hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN; | |
| 44 | ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state); | |
| 45 | break; | |
| 46 | ||
| 47 | case led_claim: | |
| 48 | led_state |= LED_STATE_CLAIMED; | |
| 49 | hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN; | |
| 50 | break; | |
| 51 | ||
| 52 | case led_release: | |
| 53 | led_state &= ~LED_STATE_CLAIMED; | |
| 54 | hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN; | |
| 55 | break; | |
| 56 | ||
| 57 | #ifdef CONFIG_LEDS_TIMER | |
| 58 | case led_timer: | |
| 59 | if (!(led_state & LED_STATE_CLAIMED)) | |
| 60 | hw_led_state ^= ASSABET_BCR_LED_GREEN; | |
| 61 | break; | |
| 62 | #endif | |
| 63 | ||
| 64 | #ifdef CONFIG_LEDS_CPU | |
| 65 | case led_idle_start: | |
| 66 | if (!(led_state & LED_STATE_CLAIMED)) | |
| 67 | hw_led_state |= ASSABET_BCR_LED_RED; | |
| 68 | break; | |
| 69 | ||
| 70 | case led_idle_end: | |
| 71 | if (!(led_state & LED_STATE_CLAIMED)) | |
| 72 | hw_led_state &= ~ASSABET_BCR_LED_RED; | |
| 73 | break; | |
| 74 | #endif | |
| 75 | ||
| 76 | case led_halted: | |
| 77 | break; | |
| 78 | ||
| 79 | case led_green_on: | |
| 80 | if (led_state & LED_STATE_CLAIMED) | |
| 81 | hw_led_state &= ~ASSABET_BCR_LED_GREEN; | |
| 82 | break; | |
| 83 | ||
| 84 | case led_green_off: | |
| 85 | if (led_state & LED_STATE_CLAIMED) | |
| 86 | hw_led_state |= ASSABET_BCR_LED_GREEN; | |
| 87 | break; | |
| 88 | ||
| 89 | case led_amber_on: | |
| 90 | break; | |
| 91 | ||
| 92 | case led_amber_off: | |
| 93 | break; | |
| 94 | ||
| 95 | case led_red_on: | |
| 96 | if (led_state & LED_STATE_CLAIMED) | |
| 97 | hw_led_state &= ~ASSABET_BCR_LED_RED; | |
| 98 | break; | |
| 99 | ||
| 100 | case led_red_off: | |
| 101 | if (led_state & LED_STATE_CLAIMED) | |
| 102 | hw_led_state |= ASSABET_BCR_LED_RED; | |
| 103 | break; | |
| 104 | ||
| 105 | default: | |
| 106 | break; | |
| 107 | } | |
| 108 | ||
| 109 | if (led_state & LED_STATE_ENABLED) | |
| 110 | ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state); | |
| 111 | ||
| 112 | local_irq_restore(flags); | |
| 113 | } |