The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/gpio.h

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    1 /* $NetBSD: gpio.h,v 1.7 2009/09/25 20:27:50 mbalmer Exp $ */
    2 /*      $OpenBSD: gpio.h,v 1.7 2008/11/26 14:51:20 mbalmer Exp $        */
    3 /*-
    4  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: releng/9.1/sys/sys/gpio.h 213237 2010-09-28 03:24:53Z gonzo $
   30  *
   31  */
   32 
   33 /*
   34  * Copyright (c) 2009 Marc Balmer <marc@msys.ch>
   35  * Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
   36  *
   37  * Permission to use, copy, modify, and distribute this software for any
   38  * purpose with or without fee is hereby granted, provided that the above
   39  * copyright notice and this permission notice appear in all copies.
   40  *
   41  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   42  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   43  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   44  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   45  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   46  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   47  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   48  */
   49 
   50 #ifndef __GPIO_H__
   51 #define __GPIO_H__
   52 
   53 #include <sys/ioccom.h>
   54 
   55 /* GPIO pin states */
   56 #define GPIO_PIN_LOW            0x00    /* low level (logical 0) */
   57 #define GPIO_PIN_HIGH           0x01    /* high level (logical 1) */
   58 
   59 /* Max name length of a pin */
   60 #define GPIOMAXNAME             64
   61 
   62 /* GPIO pin configuration flags */
   63 #define GPIO_PIN_INPUT          0x0001  /* input direction */
   64 #define GPIO_PIN_OUTPUT         0x0002  /* output direction */
   65 #define GPIO_PIN_OPENDRAIN      0x0004  /* open-drain output */
   66 #define GPIO_PIN_PUSHPULL       0x0008  /* push-pull output */
   67 #define GPIO_PIN_TRISTATE       0x0010  /* output disabled */
   68 #define GPIO_PIN_PULLUP         0x0020  /* internal pull-up enabled */
   69 #define GPIO_PIN_PULLDOWN       0x0040  /* internal pull-down enabled */
   70 #define GPIO_PIN_INVIN          0x0080  /* invert input */
   71 #define GPIO_PIN_INVOUT         0x0100  /* invert output */
   72 #define GPIO_PIN_PULSATE        0x0200  /* pulsate in hardware */
   73 
   74 struct gpio_pin {
   75         uint32_t gp_pin;                        /* pin number */
   76         char gp_name[GPIOMAXNAME];              /* human-readable name */
   77         uint32_t gp_caps;                       /* capabilities */
   78         uint32_t gp_flags;                      /* current flags */
   79 };
   80 
   81 /* GPIO pin request (read/write/toggle) */
   82 struct gpio_req {
   83         uint32_t gp_pin;                        /* pin number */
   84         uint32_t gp_value;                      /* value */
   85 };
   86 
   87 /*
   88  * ioctls
   89  */
   90 #define GPIOMAXPIN              _IOR('G', 0, int)
   91 #define GPIOGETCONFIG           _IOWR('G', 1, struct gpio_pin)
   92 #define GPIOSETCONFIG           _IOW('G', 2, struct gpio_pin)
   93 #define GPIOGET                 _IOWR('G', 3, struct gpio_req)
   94 #define GPIOSET                 _IOW('G', 4, struct gpio_req)
   95 #define GPIOTOGGLE              _IOWR('G', 5, struct gpio_req)
   96 
   97 #endif /* __GPIO_H__ */

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