uboot-vybrid_public/board/ti/beagle/led.c

/*
 * Copyright (c) 2010 Texas Instruments, Inc.
 * Jason Kridner <jkridner@beagleboard.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */
#include <common.h>
#include <status_led.h>
#include <asm/arch/cpu.h>
#include <asm/io.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/gpio.h>

static unsigned int saved_state[2] = {STATUS_LED_OFF, STATUS_LED_OFF};

/* GPIO pins for the LEDs */
#define BEAGLE_LED_USR0	149
#define BEAGLE_LED_USR1	150

#ifdef STATUS_LED_GREEN
void green_LED_off (void)
{
	__led_set (STATUS_LED_GREEN, 0);
}

void green_LED_on (void)
{
	__led_set (STATUS_LED_GREEN, 1);
}
#endif

void __led_init (led_id_t mask, int state)
{
	__led_set (mask, state);
}

void __led_toggle (led_id_t mask)
{
#ifdef STATUS_LED_BIT
	if (STATUS_LED_BIT & mask) {
		if (STATUS_LED_ON == saved_state[0])
			__led_set(STATUS_LED_BIT, 0);
		else
			__led_set(STATUS_LED_BIT, 1);
	}
#endif
#ifdef STATUS_LED_BIT1
	if (STATUS_LED_BIT1 & mask) {
		if (STATUS_LED_ON == saved_state[1])
			__led_set(STATUS_LED_BIT1, 0);
		else
			__led_set(STATUS_LED_BIT1, 1);
	}
#endif
}

void __led_set (led_id_t mask, int state)
{
#ifdef STATUS_LED_BIT
	if (STATUS_LED_BIT & mask) {
		if (!omap_request_gpio(BEAGLE_LED_USR0)) {
			omap_set_gpio_direction(BEAGLE_LED_USR0, 0);
			omap_set_gpio_dataout(BEAGLE_LED_USR0, state);
		}
		saved_state[0] = state;
	}
#endif
#ifdef STATUS_LED_BIT1
	if (STATUS_LED_BIT1 & mask) {
		if (!omap_request_gpio(BEAGLE_LED_USR1)) {
			omap_set_gpio_direction(BEAGLE_LED_USR1, 0);
			omap_set_gpio_dataout(BEAGLE_LED_USR1, state);
		}
		saved_state[1] = state;
	}
#endif
}