115 lines
2.0 KiB
C
115 lines
2.0 KiB
C
/*
|
|
* linux/arch/arm/mach-omap1/leds-osk.c
|
|
*
|
|
* LED driver for OSK with optional Mistral QVGA board
|
|
*/
|
|
#include <linux/gpio.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/leds.h>
|
|
#include <asm/system.h>
|
|
|
|
#include "leds.h"
|
|
|
|
|
|
#define LED_STATE_ENABLED (1 << 0)
|
|
#define LED_STATE_CLAIMED (1 << 1)
|
|
static u8 led_state;
|
|
|
|
#define TIMER_LED (1 << 3) /* Mistral board */
|
|
#define IDLE_LED (1 << 4) /* Mistral board */
|
|
static u8 hw_led_state;
|
|
|
|
|
|
#ifdef CONFIG_OMAP_OSK_MISTRAL
|
|
|
|
/* For now, all system indicators require the Mistral board, since that
|
|
* LED can be manipulated without a task context. This LED is either red,
|
|
* or green, but not both; it can't give the full "disco led" effect.
|
|
*/
|
|
|
|
#define GPIO_LED_RED 3
|
|
#define GPIO_LED_GREEN OMAP_MPUIO(4)
|
|
|
|
static void mistral_setled(void)
|
|
{
|
|
int red = 0;
|
|
int green = 0;
|
|
|
|
if (hw_led_state & TIMER_LED)
|
|
red = 1;
|
|
else if (hw_led_state & IDLE_LED)
|
|
green = 1;
|
|
/* else both sides are disabled */
|
|
|
|
gpio_set_value(GPIO_LED_GREEN, green);
|
|
gpio_set_value(GPIO_LED_RED, red);
|
|
}
|
|
|
|
#endif
|
|
|
|
void osk_leds_event(led_event_t evt)
|
|
{
|
|
unsigned long flags;
|
|
u16 leds;
|
|
|
|
local_irq_save(flags);
|
|
|
|
if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
|
|
goto done;
|
|
|
|
leds = hw_led_state;
|
|
switch (evt) {
|
|
case led_start:
|
|
led_state |= LED_STATE_ENABLED;
|
|
hw_led_state = 0;
|
|
leds = ~0;
|
|
break;
|
|
|
|
case led_halted:
|
|
case led_stop:
|
|
led_state &= ~LED_STATE_ENABLED;
|
|
hw_led_state = 0;
|
|
break;
|
|
|
|
case led_claim:
|
|
led_state |= LED_STATE_CLAIMED;
|
|
hw_led_state = 0;
|
|
leds = ~0;
|
|
break;
|
|
|
|
case led_release:
|
|
led_state &= ~LED_STATE_CLAIMED;
|
|
hw_led_state = 0;
|
|
break;
|
|
|
|
#ifdef CONFIG_OMAP_OSK_MISTRAL
|
|
|
|
case led_timer:
|
|
hw_led_state ^= TIMER_LED;
|
|
mistral_setled();
|
|
break;
|
|
|
|
case led_idle_start: /* idle == off */
|
|
hw_led_state &= ~IDLE_LED;
|
|
mistral_setled();
|
|
break;
|
|
|
|
case led_idle_end:
|
|
hw_led_state |= IDLE_LED;
|
|
mistral_setled();
|
|
break;
|
|
|
|
#endif /* CONFIG_OMAP_OSK_MISTRAL */
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
leds ^= hw_led_state;
|
|
|
|
done:
|
|
local_irq_restore(flags);
|
|
}
|