projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * linux/arch/arm/mach-sa1100/leds-lart.c | |
| 3 | * | |
| 4 | * (C) Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000 | |
| 5 | * | |
| 6 | * LART uses the LED as follows: | |
| 7 | * - GPIO23 is the LED, on if system is not idle | |
| 8 | * You can use both CONFIG_LEDS_CPU and CONFIG_LEDS_TIMER at the same | |
| 9 | * time, but in that case the timer events will still dictate the | |
| 10 | * pace of the LED. | |
| 11 | */ | |
| 1da177e4 LT |
12 | #include <linux/init.h> |
| 13 | ||
| a09e64fb | 14 | #include <mach/hardware.h> |
| 1da177e4 | 15 | #include <asm/leds.h> |
| 1da177e4 LT |
16 | |
| 17 | #include "leds.h" | |
| 18 | ||
| 19 | ||
| 20 | #define LED_STATE_ENABLED 1 | |
| 21 | #define LED_STATE_CLAIMED 2 | |
| 22 | ||
| 23 | static unsigned int led_state; | |
| 24 | static unsigned int hw_led_state; | |
| 25 | ||
| 26 | #define LED_23 GPIO_GPIO23 | |
| 27 | #define LED_MASK (LED_23) | |
| 28 | ||
| 29 | void lart_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 | /* pin 23 is output pin */ | |
| 38 | GPDR |= LED_23; | |
| 39 | hw_led_state = LED_MASK; | |
| 40 | led_state = LED_STATE_ENABLED; | |
| 41 | break; | |
| 42 | ||
| 43 | case led_stop: | |
| 44 | led_state &= ~LED_STATE_ENABLED; | |
| 45 | break; | |
| 46 | ||
| 47 | case led_claim: | |
| 48 | led_state |= LED_STATE_CLAIMED; | |
| 49 | hw_led_state = LED_MASK; | |
| 50 | break; | |
| 51 | ||
| 52 | case led_release: | |
| 53 | led_state &= ~LED_STATE_CLAIMED; | |
| 54 | hw_led_state = LED_MASK; | |
| 55 | break; | |
| 56 | ||
| 57 | #ifdef CONFIG_LEDS_TIMER | |
| 58 | case led_timer: | |
| 59 | if (!(led_state & LED_STATE_CLAIMED)) | |
| 60 | hw_led_state ^= LED_23; | |
| 61 | break; | |
| 62 | #endif | |
| 63 | ||
| 64 | #ifdef CONFIG_LEDS_CPU | |
| 65 | case led_idle_start: | |
| 66 | /* The LART people like the LED to be off when the | |
| 67 | system is idle... */ | |
| 68 | if (!(led_state & LED_STATE_CLAIMED)) | |
| 69 | hw_led_state &= ~LED_23; | |
| 70 | break; | |
| 71 | ||
| 72 | case led_idle_end: | |
| 73 | /* ... and on if the system is not idle */ | |
| 74 | if (!(led_state & LED_STATE_CLAIMED)) | |
| 75 | hw_led_state |= LED_23; | |
| 76 | break; | |
| 77 | #endif | |
| 78 | ||
| 79 | case led_red_on: | |
| 80 | if (led_state & LED_STATE_CLAIMED) | |
| 81 | hw_led_state &= ~LED_23; | |
| 82 | break; | |
| 83 | ||
| 84 | case led_red_off: | |
| 85 | if (led_state & LED_STATE_CLAIMED) | |
| 86 | hw_led_state |= LED_23; | |
| 87 | break; | |
| 88 | ||
| 89 | default: | |
| 90 | break; | |
| 91 | } | |
| 92 | ||
| 93 | /* Now set the GPIO state, or nothing will happen at all */ | |
| 94 | if (led_state & LED_STATE_ENABLED) { | |
| 95 | GPSR = hw_led_state; | |
| 96 | GPCR = hw_led_state ^ LED_MASK; | |
| 97 | } | |
| 98 | ||
| 99 | local_irq_restore(flags); | |
| 100 | } |