/* * linux/arch/arm/mach-omap1/leds-osk.c * * LED driver for OSK, and optionally Mistral QVGA, boards */#include <linux/config.h>#include <linux/init.h>#include <linux/workqueue.h>#include <asm/hardware.h>#include <asm/leds.h>#include <asm/system.h>#include <asm/arch/gpio.h>#include <asm/arch/tps65010.h>#include "leds.h"#define LED_STATE_ENABLED	(1 << 0)#define LED_STATE_CLAIMED	(1 << 1)static u8 led_state;#define	GREEN_LED		(1 << 0)	/* TPS65010 LED1 */#define	AMBER_LED		(1 << 1)	/* TPS65010 LED2 */#define	RED_LED			(1 << 2)	/* TPS65010 GPIO2 */#define	TIMER_LED		(1 << 3)	/* Mistral board */#define	IDLE_LED		(1 << 4)	/* Mistral board */static u8 hw_led_state;/* TPS65010 leds are changed using i2c -- from a task context. * Using one of these for the "idle" LED would be impractical... */#define	TPS_LEDS	(GREEN_LED | RED_LED | AMBER_LED)static u8 tps_leds_change;static void tps_work(void *unused){	for (;;) {		u8	leds;		local_irq_disable();		leds = tps_leds_change;		tps_leds_change = 0;		local_irq_enable();		if (!leds)			break;		/* careful:  the set_led() value is on/off/blink */		if (leds & GREEN_LED)			tps65010_set_led(LED1, !!(hw_led_state & GREEN_LED));		if (leds & AMBER_LED)			tps65010_set_led(LED2, !!(hw_led_state & AMBER_LED));		/* the gpio led doesn't have that issue */		if (leds & RED_LED)			tps65010_set_gpio_out_value(GPIO2,					!(hw_led_state & RED_LED));	}}static DECLARE_WORK(work, tps_work, NULL);#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	omap_set_gpio_dataout(GPIO_LED_GREEN, green);	omap_set_gpio_dataout(GPIO_LED_RED, red);}#endifvoid 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;		// NOTE:  work may still be pending!!		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:		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 */	/* "green" == tps LED1 (leftmost, normally power-good)	 * works only with DC adapter, not on battery power!	 */	case led_green_on:		if (led_state & LED_STATE_CLAIMED)			hw_led_state |= GREEN_LED;		break;	case led_green_off:		if (led_state & LED_STATE_CLAIMED)			hw_led_state &= ~GREEN_LED;		break;	/* "amber" == tps LED2 (middle) */	case led_amber_on:		if (led_state & LED_STATE_CLAIMED)			hw_led_state |= AMBER_LED;		break;	case led_amber_off:		if (led_state & LED_STATE_CLAIMED)			hw_led_state &= ~AMBER_LED;		break;	/* "red" == LED on tps gpio3 (rightmost) */	case led_red_on:		if (led_state & LED_STATE_CLAIMED)			hw_led_state |= RED_LED;		break;	case led_red_off:		if (led_state & LED_STATE_CLAIMED)			hw_led_state &= ~RED_LED;		break;	default:		break;	}	leds ^= hw_led_state;	leds &= TPS_LEDS;	if (leds && (led_state & LED_STATE_CLAIMED)) {		tps_leds_change |= leds;		schedule_work(&work);	}done:	local_irq_restore(flags);}