Annotation of sys/sys/gpio.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: gpio.h,v 1.1 2004/06/03 18:08:00 grange 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: /* GPIO pin configuration flags */
! 26: #define GPIO_PIN_INPUT 0x0001 /* input direction */
! 27: #define GPIO_PIN_OUTPUT 0x0002 /* output direction */
! 28: #define GPIO_PIN_INOUT 0x0004 /* bi-directional */
! 29: #define GPIO_PIN_OPENDRAIN 0x0008 /* open-drain output */
! 30: #define GPIO_PIN_PUSHPULL 0x0010 /* push-pull output */
! 31: #define GPIO_PIN_TRISTATE 0x0020 /* output disabled */
! 32: #define GPIO_PIN_PULLUP 0x0040 /* internal pull-up enabled */
! 33:
! 34: /* GPIO controller description */
! 35: struct gpio_info {
! 36: int gpio_npins; /* total number of pins available */
! 37: };
! 38:
! 39: /* GPIO pin operation (read/write/toggle) */
! 40: struct gpio_pin_op {
! 41: int gp_pin; /* pin number */
! 42: int gp_value; /* value */
! 43: };
! 44:
! 45: /* GPIO pin control */
! 46: struct gpio_pin_ctl {
! 47: int gp_pin; /* pin number */
! 48: int gp_caps; /* pin capabilities (read-only) */
! 49: int gp_flags; /* pin configuration flags */
! 50: };
! 51:
! 52: #define GPIOINFO _IOR('G', 0, struct gpio_info)
! 53: #define GPIOPINREAD _IOWR('G', 1, struct gpio_pin_op)
! 54: #define GPIOPINWRITE _IOWR('G', 2, struct gpio_pin_op)
! 55: #define GPIOPINTOGGLE _IOWR('G', 3, struct gpio_pin_op)
! 56: #define GPIOPINCTL _IOWR('G', 4, struct gpio_pin_ctl)
! 57:
! 58: #endif /* !_SYS_GPIO_H_ */
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