- /*
- * linux/arch/arm/mach-sa1100/leds-brutus.c
- *
- * Copyright (C) 2000 Nicolas Pitre
- *
- * Brutus uses the LEDs as follows:
- * - D3 (Green, GPIO9) - toggles state every 50 timer interrupts
- * - D17 (Red, GPIO20) - on if system is not idle
- * - D4 (Green, GPIO8) - misc function
- */
- #include <linux/config.h>
- #include <linux/init.h>
- #include <asm/hardware.h>
- #include <asm/leds.h>
- #include <asm/system.h>
- #include "leds.h"
- #define LED_STATE_ENABLED 1
- #define LED_STATE_CLAIMED 2
- static unsigned int led_state;
- static unsigned int hw_led_state;
- #define LED_D3 GPIO_GPIO(9)
- #define LED_D4 GPIO_GPIO(8)
- #define LED_D17 GPIO_GPIO(20)
- #define LED_MASK (LED_D3|LED_D4|LED_D17)
- void brutus_leds_event(led_event_t evt)
- {
- unsigned long flags;
- local_irq_save(flags);
- switch (evt) {
- case led_start:
- hw_led_state = LED_MASK;
- led_state = LED_STATE_ENABLED;
- break;
- case led_stop:
- led_state &= ~LED_STATE_ENABLED;
- break;
- case led_claim:
- led_state |= LED_STATE_CLAIMED;
- hw_led_state = LED_MASK;
- break;
- case led_release:
- led_state &= ~LED_STATE_CLAIMED;
- hw_led_state = LED_MASK;
- break;
- #ifdef CONFIG_LEDS_TIMER
- case led_timer:
- if (!(led_state & LED_STATE_CLAIMED))
- hw_led_state ^= LED_D3;
- break;
- #endif
- #ifdef CONFIG_LEDS_CPU
- case led_idle_start:
- if (!(led_state & LED_STATE_CLAIMED))
- hw_led_state |= LED_D17;
- break;
- case led_idle_end:
- if (!(led_state & LED_STATE_CLAIMED))
- hw_led_state &= ~LED_D17;
- break;
- #endif
- case led_green_on:
- hw_led_state &= ~LED_D4;
- break;
- case led_green_off:
- hw_led_state |= LED_D4;
- break;
- case led_amber_on:
- break;
- case led_amber_off:
- break;
- case led_red_on:
- if (led_state & LED_STATE_CLAIMED)
- hw_led_state &= ~LED_D17;
- break;
- case led_red_off:
- if (led_state & LED_STATE_CLAIMED)
- hw_led_state |= LED_D17;
- break;
- default:
- break;
- }
- if (led_state & LED_STATE_ENABLED) {
- GPSR = hw_led_state;
- GPCR = hw_led_state ^ LED_MASK;
- }
- local_irq_restore(flags);
- }