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

     /* $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: releng/11.1/sys/sys/gpio.h 298738 2016-04-28 12:03:22Z mmel $
     *
     */
    
    /*
     * 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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