1 /* $OpenBSD: gpio.h,v 1.8 2011/10/03 20:24:51 matthieu Exp $ */ 2 /* 3 * Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef _SYS_GPIO_H_ 19 #define _SYS_GPIO_H_ 20 21 /* GPIO pin states */ 22 #define GPIO_PIN_LOW 0x00 /* low level (logical 0) */ 23 #define GPIO_PIN_HIGH 0x01 /* high level (logical 1) */ 24 25 /* Max name length of a pin */ 26 #define GPIOPINMAXNAME 64 27 28 /* GPIO pin configuration flags */ 29 #define GPIO_PIN_INPUT 0x0001 /* input direction */ 30 #define GPIO_PIN_OUTPUT 0x0002 /* output direction */ 31 #define GPIO_PIN_INOUT 0x0004 /* bi-directional */ 32 #define GPIO_PIN_OPENDRAIN 0x0008 /* open-drain output */ 33 #define GPIO_PIN_PUSHPULL 0x0010 /* push-pull output */ 34 #define GPIO_PIN_TRISTATE 0x0020 /* output disabled */ 35 #define GPIO_PIN_PULLUP 0x0040 /* internal pull-up enabled */ 36 #define GPIO_PIN_PULLDOWN 0x0080 /* internal pull-down enabled */ 37 #define GPIO_PIN_INVIN 0x0100 /* invert input */ 38 #define GPIO_PIN_INVOUT 0x0200 /* invert output */ 39 #define GPIO_PIN_USER 0x0400 /* user != 0 can access */ 40 #define GPIO_PIN_SET 0x8000 /* set for securelevel access */ 41 42 /* GPIO controller description */ 43 struct gpio_info { 44 int gpio_npins; /* total number of pins available */ 45 }; 46 47 /* GPIO pin operation (read/write/toggle) */ 48 struct gpio_pin_op { 49 char gp_name[GPIOPINMAXNAME]; /* pin name */ 50 int gp_pin; /* pin number */ 51 int gp_value; /* value */ 52 }; 53 54 /* GPIO pin configuration */ 55 struct gpio_pin_set { 56 char gp_name[GPIOPINMAXNAME]; 57 int gp_pin; 58 int gp_caps; 59 int gp_flags; 60 char gp_name2[GPIOPINMAXNAME]; /* new name */ 61 }; 62 63 /* Attach/detach device drivers that use GPIO pins */ 64 struct gpio_attach { 65 char ga_dvname[16]; /* device name */ 66 int ga_offset; /* pin number */ 67 u_int32_t ga_mask; /* binary mask */ 68 u_int32_t ga_flags; /* flags */ 69 }; 70 71 #define GPIOINFO _IOR('G', 0, struct gpio_info) 72 #define GPIOPINREAD _IOWR('G', 1, struct gpio_pin_op) 73 #define GPIOPINWRITE _IOWR('G', 2, struct gpio_pin_op) 74 #define GPIOPINTOGGLE _IOWR('G', 3, struct gpio_pin_op) 75 #define GPIOPINSET _IOWR('G', 4, struct gpio_pin_set) 76 #define GPIOPINUNSET _IOWR('G', 5, struct gpio_pin_set) 77 #define GPIOATTACH _IOWR('G', 6, struct gpio_attach) 78 #define GPIODETACH _IOWR('G', 7, struct gpio_attach) 79 80 #endif /* !_SYS_GPIO_H_ */ 81