uboot-vybrid_public/include/asm-arm/arch-kirkwood/gpio.h

/*
 * arch/asm-arm/mach-kirkwood/include/mach/gpio.h
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA
 */

/*
 * Based on (mostly copied from) plat-orion based Linux 2.6 kernel driver.
 * Removed kernel level irq handling. Took some macros from kernel to
 * allow build.
 *
 * Dieter Kiermaier dk-arm-linux@gmx.de
 */

#ifndef __KIRKWOOD_GPIO_H
#define __KIRKWOOD_GPIO_H

/* got from kernel include/linux/bitops.h */
#define BITS_PER_BYTE 8
#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))

#define GPIO_MAX		50
#define GPIO_OFF(pin)		(((pin) >> 5) ? 0x0040 : 0x0000)
#define GPIO_OUT(pin)		(KW_GPIO0_BASE + GPIO_OFF(pin) + 0x00)
#define GPIO_IO_CONF(pin)	(KW_GPIO0_BASE + GPIO_OFF(pin) + 0x04)
#define GPIO_BLINK_EN(pin)	(KW_GPIO0_BASE + GPIO_OFF(pin) + 0x08)
#define GPIO_IN_POL(pin)	(KW_GPIO0_BASE + GPIO_OFF(pin) + 0x0c)
#define GPIO_DATA_IN(pin)	(KW_GPIO0_BASE + GPIO_OFF(pin) + 0x10)
#define GPIO_EDGE_CAUSE(pin)	(KW_GPIO0_BASE + GPIO_OFF(pin) + 0x14)
#define GPIO_EDGE_MASK(pin)	(KW_GPIO0_BASE + GPIO_OFF(pin) + 0x18)
#define GPIO_LEVEL_MASK(pin)	(KW_GPIO0_BASE + GPIO_OFF(pin) + 0x1c)

/*
 * Kirkwood-specific GPIO API
 */

void kw_gpio_set_valid(unsigned pin, int mode);
int kw_gpio_is_valid(unsigned pin, int mode);
int kw_gpio_direction_input(unsigned pin);
int kw_gpio_direction_output(unsigned pin, int value);
int kw_gpio_get_value(unsigned pin);
void kw_gpio_set_value(unsigned pin, int value);
void kw_gpio_set_blink(unsigned pin, int blink);
void kw_gpio_set_unused(unsigned pin);

#define GPIO_INPUT_OK		(1 << 0)
#define GPIO_OUTPUT_OK		(1 << 1)

#endif