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Diffstat (limited to 'arch/arm/kernel/leds-footbridge.c')
| -rw-r--r-- | arch/arm/kernel/leds-footbridge.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/arch/arm/kernel/leds-footbridge.c b/arch/arm/kernel/leds-footbridge.c new file mode 100644 index 000000000..cb6c7f4b4 --- /dev/null +++ b/arch/arm/kernel/leds-footbridge.c @@ -0,0 +1,249 @@ +/* + * arch/arm/kernel/leds-footbridge.c + * + * Copyright (C) 1998-1999 Russell King + * + * EBSA-285 and NetWinder LED control routines. + * + * The EBSA-285 uses the leds as follows: + * - Green - toggles state every 50 timer interrupts + * - Amber - On if system is not idle + * - Red - currently unused + * + * The Netwinder uses the leds as follows: + * - Green - toggles state every 50 timer interrupts + * - Red - On if the system is not idle + * + * Changelog: + * 02-05-1999 RMK Various cleanups + */ +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> + +#include <asm/hardware.h> +#include <asm/leds.h> +#include <asm/spinlock.h> +#include <asm/system.h> + +#define LED_STATE_ENABLED 1 +#define LED_STATE_CLAIMED 2 +static char led_state; +static char hw_led_state; + +static spinlock_t leds_lock = SPIN_LOCK_UNLOCKED; + +#ifdef CONFIG_ARCH_EBSA285 + +static void __ebsa285_text ebsa285_leds_event(led_event_t evt) +{ + unsigned long flags; + + spin_lock_irqsave(&leds_lock, flags); + + switch (evt) { + case led_start: + hw_led_state = XBUS_LED_RED | XBUS_LED_GREEN; +#ifndef CONFIG_LEDS_IDLE + hw_led_state |= XBUS_LED_AMBER; +#endif + 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 = XBUS_LED_RED | XBUS_LED_GREEN | XBUS_LED_AMBER; + break; + + case led_release: + led_state &= ~LED_STATE_CLAIMED; + hw_led_state = XBUS_LED_RED | XBUS_LED_GREEN | XBUS_LED_AMBER; + break; + +#ifdef CONFIG_LEDS_TIMER + case led_timer: + if (!(led_state & LED_STATE_CLAIMED)) + hw_led_state ^= XBUS_LED_GREEN; + break; +#endif + +#ifdef CONFIG_LEDS_CPU + case led_idle_start: + if (!(led_state & LED_STATE_CLAIMED)) + hw_led_state |= XBUS_LED_RED; + break; + + case led_idle_end: + if (!(led_state & LED_STATE_CLAIMED)) + hw_led_state &= ~XBUS_LED_RED; + break; +#endif + + case led_green_on: + if (led_state & LED_STATE_CLAIMED) + hw_led_state &= ~XBUS_LED_GREEN; + break; + + case led_green_off: + if (led_state & LED_STATE_CLAIMED) + hw_led_state |= XBUS_LED_GREEN; + break; + + case led_amber_on: + if (led_state & LED_STATE_CLAIMED) + hw_led_state &= ~XBUS_LED_AMBER; + break; + + case led_amber_off: + if (led_state & LED_STATE_CLAIMED) + hw_led_state |= XBUS_LED_AMBER; + break; + + case led_red_on: + if (led_state & LED_STATE_CLAIMED) + hw_led_state &= ~XBUS_LED_RED; + break; + + case led_red_off: + if (led_state & LED_STATE_CLAIMED) + hw_led_state |= XBUS_LED_RED; + break; + + default: + break; + } + + if (led_state & LED_STATE_ENABLED) + *XBUS_LEDS = hw_led_state; + + spin_unlock_irqrestore(&leds_lock, flags); +} + +#endif + +#ifdef CONFIG_ARCH_NETWINDER + +static void __netwinder_text netwinder_leds_event(led_event_t evt) +{ + unsigned long flags; + + spin_lock_irqsave(&leds_lock, flags); + + switch (evt) { + case led_start: + led_state |= LED_STATE_ENABLED; + hw_led_state = 0; + break; + + case led_stop: + led_state &= ~LED_STATE_ENABLED; + break; + + case led_claim: + led_state |= LED_STATE_CLAIMED; + hw_led_state = 0; + break; + + case led_release: + led_state &= ~LED_STATE_CLAIMED; + hw_led_state = 0; + break; + +#ifdef CONFIG_LEDS_TIMER + case led_timer: + if (!(led_state & LED_STATE_CLAIMED)) + hw_led_state ^= GPIO_GREEN_LED; + break; +#endif + +#ifdef CONFIG_LEDS_CPU + case led_idle_start: + if (!(led_state & LED_STATE_CLAIMED)) + hw_led_state &= ~GPIO_RED_LED; + break; + + case led_idle_end: + if (!(led_state & LED_STATE_CLAIMED)) + hw_led_state |= GPIO_RED_LED; + break; +#endif + + case led_green_on: + if (led_state & LED_STATE_CLAIMED) + hw_led_state |= GPIO_GREEN_LED; + break; + + case led_green_off: + if (led_state & LED_STATE_CLAIMED) + hw_led_state &= ~GPIO_GREEN_LED; + break; + + case led_amber_on: + if (led_state & LED_STATE_CLAIMED) + hw_led_state |= GPIO_GREEN_LED | GPIO_RED_LED; + break; + + case led_amber_off: + if (led_state & LED_STATE_CLAIMED) + hw_led_state &= ~(GPIO_GREEN_LED | GPIO_RED_LED); + break; + + case led_red_on: + if (led_state & LED_STATE_CLAIMED) + hw_led_state |= GPIO_RED_LED; + break; + + case led_red_off: + if (led_state & LED_STATE_CLAIMED) + hw_led_state &= ~GPIO_RED_LED; + break; + + default: + break; + } + + spin_unlock_irqrestore(&leds_lock, flags); + + if (led_state & LED_STATE_ENABLED) { + spin_lock_irqsave(&gpio_lock, flags); + gpio_modify_op(GPIO_RED_LED | GPIO_GREEN_LED, hw_led_state); + spin_unlock_irqrestore(&gpio_lock, flags); + } +} + +#endif + +static void dummy_leds_event(led_event_t evt) +{ +} + +__initfunc(void +init_leds_event(led_event_t evt)) +{ + switch (machine_arch_type) { +#ifdef CONFIG_ARCH_EBSA285 + case MACH_TYPE_EBSA285: + leds_event = ebsa285_leds_event; + break; +#endif +#ifdef CONFIG_ARCH_NETWINDER + case MACH_TYPE_NETWINDER: + leds_event = netwinder_leds_event; + break; +#endif + + default: + leds_event = dummy_leds_event; + } + + leds_event(evt); +} + +void (*leds_event)(led_event_t) = init_leds_event; + +EXPORT_SYMBOL(leds_event); |