118 lines
4.0 KiB
C
118 lines
4.0 KiB
C
/* $NetBSD: gpio.h,v 1.14 2015/09/06 06:01:02 dholland Exp $ */
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/* $OpenBSD: gpio.h,v 1.7 2008/11/26 14:51:20 mbalmer Exp $ */
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/*
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* Copyright (c) 2009, 2011 Marc Balmer <marc@msys.ch>
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* Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _SYS_GPIO_H_
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#define _SYS_GPIO_H_
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#include <sys/ioccom.h>
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#include <sys/time.h>
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/* GPIO pin states */
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#define GPIO_PIN_LOW 0x00 /* low level (logical 0) */
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#define GPIO_PIN_HIGH 0x01 /* high level (logical 1) */
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/* Max name length of a pin */
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#define GPIOMAXNAME 64
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/* GPIO pin configuration flags */
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#define GPIO_PIN_INPUT 0x0001 /* input direction */
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#define GPIO_PIN_OUTPUT 0x0002 /* output direction */
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#define GPIO_PIN_INOUT 0x0004 /* bi-directional */
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#define GPIO_PIN_OPENDRAIN 0x0008 /* open-drain output */
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#define GPIO_PIN_PUSHPULL 0x0010 /* push-pull output */
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#define GPIO_PIN_TRISTATE 0x0020 /* output disabled */
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#define GPIO_PIN_PULLUP 0x0040 /* internal pull-up enabled */
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#define GPIO_PIN_PULLDOWN 0x0080 /* internal pull-down enabled */
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#define GPIO_PIN_INVIN 0x0100 /* invert input */
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#define GPIO_PIN_INVOUT 0x0200 /* invert output */
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#define GPIO_PIN_USER 0x0400 /* user != 0 can access */
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#define GPIO_PIN_PULSATE 0x0800 /* pulsate in hardware */
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#define GPIO_PIN_SET 0x8000 /* set for securelevel access */
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/* GPIO controller description */
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struct gpio_info {
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int gpio_npins; /* total number of pins available */
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};
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/* GPIO pin request (read/write/toggle) */
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struct gpio_req {
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char gp_name[GPIOMAXNAME]; /* pin name */
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int gp_pin; /* pin number */
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int gp_value; /* value */
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};
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/* GPIO pin configuration */
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struct gpio_set {
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char gp_name[GPIOMAXNAME];
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int gp_pin;
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int gp_caps;
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int gp_flags;
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char gp_name2[GPIOMAXNAME]; /* new name */
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};
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/* Attach device drivers that use GPIO pins */
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struct gpio_attach {
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char ga_dvname[16]; /* device name */
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int ga_offset; /* pin number */
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uint32_t ga_mask; /* binary mask */
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uint32_t ga_flags; /* driver dependent flags */
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};
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/* gpio(4) API */
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#define GPIOINFO _IOR('G', 0, struct gpio_info)
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#define GPIOSET _IOWR('G', 5, struct gpio_set)
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#define GPIOUNSET _IOWR('G', 6, struct gpio_set)
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#define GPIOREAD _IOWR('G', 7, struct gpio_req)
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#define GPIOWRITE _IOWR('G', 8, struct gpio_req)
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#define GPIOTOGGLE _IOWR('G', 9, struct gpio_req)
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#define GPIOATTACH _IOWR('G', 10, struct gpio_attach)
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#ifdef COMPAT_50
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/* Old structure to attach/detach devices */
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struct gpio_attach50 {
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char ga_dvname[16]; /* device name */
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int ga_offset; /* pin number */
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uint32_t ga_mask; /* binary mask */
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};
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/* GPIO pin control (old API) */
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struct gpio_pin_ctl {
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int gp_pin; /* pin number */
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int gp_caps; /* pin capabilities (read-only) */
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int gp_flags; /* pin configuration flags */
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};
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/* GPIO pin operation (read/write/toggle) (old API) */
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struct gpio_pin_op {
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int gp_pin; /* pin number */
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int gp_value; /* value */
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};
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/* the old API */
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#define GPIOPINREAD _IOWR('G', 1, struct gpio_pin_op)
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#define GPIOPINWRITE _IOWR('G', 2, struct gpio_pin_op)
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#define GPIOPINTOGGLE _IOWR('G', 3, struct gpio_pin_op)
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#define GPIOPINCTL _IOWR('G', 4, struct gpio_pin_ctl)
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#define GPIOATTACH50 _IOWR('G', 10, struct gpio_attach50)
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#define GPIODETACH50 _IOWR('G', 11, struct gpio_attach50)
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#define GPIODETACH _IOWR('G', 11, struct gpio_attach)
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#endif /* COMPAT_50 */
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#endif /* !_SYS_GPIO_H_ */
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