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/* $NetBSD: gpio.h,v 1.7 2009/09/25 20:27:50 mbalmer Exp $ */
/* $OpenBSD: gpio.h,v 1.7 2008/11/26 14:51:20 mbalmer Exp $ */
/*-
* Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
*/
/*
* Copyright (c) 2009 Marc Balmer <marc@msys.ch>
* Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __GPIO_H__
#define __GPIO_H__
#include <sys/ioccom.h>
/* GPIO pin states */
#define GPIO_PIN_LOW 0x00 /* low level (logical 0) */
#define GPIO_PIN_HIGH 0x01 /* high level (logical 1) */
/* Max name length of a pin */
#define GPIOMAXNAME 64
/* GPIO pin configuration flags */
#define GPIO_PIN_INPUT 0x00000001 /* input direction */
#define GPIO_PIN_OUTPUT 0x00000002 /* output direction */
#define GPIO_PIN_OPENDRAIN 0x00000004 /* open-drain output */
#define GPIO_PIN_PUSHPULL 0x00000008 /* push-pull output */
#define GPIO_PIN_TRISTATE 0x00000010 /* output disabled */
#define GPIO_PIN_PULLUP 0x00000020 /* internal pull-up enabled */
#define GPIO_PIN_PULLDOWN 0x00000040 /* internal pull-down enabled */
#define GPIO_PIN_INVIN 0x00000080 /* invert input */
#define GPIO_PIN_INVOUT 0x00000100 /* invert output */
#define GPIO_PIN_PULSATE 0x00000200 /* pulsate in hardware */
/* GPIO interrupt capabilities */
#define GPIO_INTR_NONE 0x00000000 /* no interrupt support */
#define GPIO_INTR_LEVEL_LOW 0x00010000 /* level trigger, low */
#define GPIO_INTR_LEVEL_HIGH 0x00020000 /* level trigger, high */
#define GPIO_INTR_EDGE_RISING 0x00040000 /* edge trigger, rising */
#define GPIO_INTR_EDGE_FALLING 0x00080000 /* edge trigger, falling */
#define GPIO_INTR_EDGE_BOTH 0x00100000 /* edge trigger, both */
#define GPIO_INTR_MASK (GPIO_INTR_LEVEL_LOW | GPIO_INTR_LEVEL_HIGH | \
GPIO_INTR_EDGE_RISING | \
GPIO_INTR_EDGE_FALLING | GPIO_INTR_EDGE_BOTH)
struct gpio_pin {
uint32_t gp_pin; /* pin number */
char gp_name[GPIOMAXNAME]; /* human-readable name */
uint32_t gp_caps; /* capabilities */
uint32_t gp_flags; /* current flags */
};
/* GPIO pin request (read/write/toggle) */
struct gpio_req {
uint32_t gp_pin; /* pin number */
uint32_t gp_value; /* value */
};
/*
* ioctls
*/
#define GPIOMAXPIN _IOR('G', 0, int)
#define GPIOGETCONFIG _IOWR('G', 1, struct gpio_pin)
#define GPIOSETCONFIG _IOW('G', 2, struct gpio_pin)
#define GPIOGET _IOWR('G', 3, struct gpio_req)
#define GPIOSET _IOW('G', 4, struct gpio_req)
#define GPIOTOGGLE _IOWR('G', 5, struct gpio_req)
#define GPIOSETNAME _IOW('G', 6, struct gpio_pin)
#endif /* __GPIO_H__ */
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