File: [local] / sys / sys / gpio.h (download)
Revision 1.1, Tue Mar 4 16:16:11 2008 UTC (16 years ago) by nbrk
Branch point for: MAIN
Initial revision
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/* $OpenBSD: gpio.h,v 1.1 2004/06/03 18:08:00 grange Exp $ */
/*
* 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 _SYS_GPIO_H_
#define _SYS_GPIO_H_
/* GPIO pin states */
#define GPIO_PIN_LOW 0x00 /* low level (logical 0) */
#define GPIO_PIN_HIGH 0x01 /* high level (logical 1) */
/* GPIO pin configuration flags */
#define GPIO_PIN_INPUT 0x0001 /* input direction */
#define GPIO_PIN_OUTPUT 0x0002 /* output direction */
#define GPIO_PIN_INOUT 0x0004 /* bi-directional */
#define GPIO_PIN_OPENDRAIN 0x0008 /* open-drain output */
#define GPIO_PIN_PUSHPULL 0x0010 /* push-pull output */
#define GPIO_PIN_TRISTATE 0x0020 /* output disabled */
#define GPIO_PIN_PULLUP 0x0040 /* internal pull-up enabled */
/* GPIO controller description */
struct gpio_info {
int gpio_npins; /* total number of pins available */
};
/* GPIO pin operation (read/write/toggle) */
struct gpio_pin_op {
int gp_pin; /* pin number */
int gp_value; /* value */
};
/* GPIO pin control */
struct gpio_pin_ctl {
int gp_pin; /* pin number */
int gp_caps; /* pin capabilities (read-only) */
int gp_flags; /* pin configuration flags */
};
#define GPIOINFO _IOR('G', 0, struct gpio_info)
#define GPIOPINREAD _IOWR('G', 1, struct gpio_pin_op)
#define GPIOPINWRITE _IOWR('G', 2, struct gpio_pin_op)
#define GPIOPINTOGGLE _IOWR('G', 3, struct gpio_pin_op)
#define GPIOPINCTL _IOWR('G', 4, struct gpio_pin_ctl)
#endif /* !_SYS_GPIO_H_ */