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Annotation of sys/sys/gpio.h, Revision 1.1.1.1

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_ */