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 * $FreeBSD$ 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 #define GPIOSETNAME _IOW('G', 6, struct gpio_pin) 97 98 #endif /* __GPIO_H__ */ 99