openwrt-xburst/target/linux/ifxmips/files/include/asm-mips/mach-ifxmips/gpio.h

/*
 *   include/asm-mips/mach-ifxmips/gpio.h 
 *
 *   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.
 *
 *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
 *
 */

#ifndef _IFXMIPS_GPIO_H_
#define _IFXMIPS_GPIO_H_

#include <asm/ifxmips/ifxmips.h>
#include <asm/ifxmips/ifxmips_gpio.h>

#define GPIO_TO_PORT(x) ((x > 15)?(1):(0))
#define GPIO_TO_GPIO(x) ((x > 15)?(x-16):(x))

static inline int gpio_direction_input(unsigned gpio) {
	ifxmips_port_set_open_drain(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	ifxmips_port_clear_altsel0(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	ifxmips_port_clear_altsel1(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	ifxmips_port_set_dir_in(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	return 0;
}

static inline int gpio_direction_output(unsigned gpio, int value) {
	ifxmips_port_clear_open_drain(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	ifxmips_port_clear_altsel0(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	ifxmips_port_clear_altsel1(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	ifxmips_port_set_dir_out(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	return 0;
}

static inline int gpio_get_value(unsigned gpio) {
	ifxmips_port_get_input(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	return 0;
}

static inline void gpio_set_value(unsigned gpio, int value) {
	if(value)
		ifxmips_port_set_output(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
	else
		ifxmips_port_clear_output(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
}

static inline int gpio_request(unsigned gpio, const char *label) {
	return 0;
}

static inline void gpio_free(unsigned gpio) {
}

static inline int gpio_to_irq(unsigned gpio) {
	return 0;
}

static inline int irq_to_gpio(unsigned irq) {
	return 0;
}

static inline int gpio_cansleep(unsigned gpio) {
	return 0;
}

static inline int gpio_get_value_cansleep(unsigned gpio) {
	might_sleep();
 	return gpio_get_value(gpio);
}

static inline void gpio_set_value_cansleep(unsigned gpio, int value) {
	might_sleep();
	gpio_set_value(gpio, value);
}

static inline int gpio_is_valid(int number)
{
	return ((unsigned)number) < 8;
}

#endif