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_ */
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