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