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/* $NetBSD: gpio.h,v 1.16 2018/05/19 13:59:06 thorpej Exp $ */
/* $OpenBSD: gpio.h,v 1.7 2008/11/26 14:51:20 mbalmer Exp $ */
/*
* Copyright (c) 2009, 2011 Marc Balmer <marc@msys.ch>
* 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_
#include <sys/ioccom.h>
#include <sys/time.h>
/* GPIO pin states */
#define GPIO_PIN_LOW 0x00 /* low level (logical 0) */
#define GPIO_PIN_HIGH 0x01 /* high level (logical 1) */
/* Max name length of a pin */
#define GPIOMAXNAME 64
/* GPIO pin configuration flags */
#define GPIO_PIN_INPUT 0x00000001 /* input direction */
#define GPIO_PIN_OUTPUT 0x00000002 /* output direction */
#define GPIO_PIN_INOUT 0x00000004 /* bi-directional */
#define GPIO_PIN_OPENDRAIN 0x00000008 /* open-drain output */
#define GPIO_PIN_PUSHPULL 0x00000010 /* push-pull output */
#define GPIO_PIN_TRISTATE 0x00000020 /* output disabled */
#define GPIO_PIN_PULLUP 0x00000040 /* internal pull-up enabled */
#define GPIO_PIN_PULLDOWN 0x00000080 /* internal pull-down enabled */
#define GPIO_PIN_INVIN 0x00000100 /* invert input */
#define GPIO_PIN_INVOUT 0x00000200 /* invert output */
#define GPIO_PIN_USER 0x00000400 /* user != 0 can access */
#define GPIO_PIN_PULSATE 0x00000800 /* pulsate in hardware */
#define GPIO_PIN_SET 0x00008000 /* set for securelevel access */
#define GPIO_PIN_ALT0 0x00010000 /* alternate function 0 */
#define GPIO_PIN_ALT1 0x00020000 /* alternate function 1 */
#define GPIO_PIN_ALT2 0x00040000 /* alternate function 2 */
#define GPIO_PIN_ALT3 0x00080000 /* alternate function 3 */
#define GPIO_PIN_ALT4 0x00100000 /* alternate function 4 */
#define GPIO_PIN_ALT5 0x00200000 /* alternate function 5 */
#define GPIO_PIN_ALT6 0x00400000 /* alternate function 6 */
#define GPIO_PIN_ALT7 0x00800000 /* alternate function 7 */
#define GPIO_PIN_HWCAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | \
GPIO_PIN_INOUT | GPIO_PIN_OPENDRAIN | \
GPIO_PIN_PUSHPULL | GPIO_PIN_TRISTATE | \
GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN | \
GPIO_PIN_PULSATE | GPIO_PIN_ALT0 | \
GPIO_PIN_ALT1 | GPIO_PIN_ALT2 | \
GPIO_PIN_ALT3 | GPIO_PIN_ALT4 | \
GPIO_PIN_ALT5 | GPIO_PIN_ALT6 | \
GPIO_PIN_ALT7)
/* GPIO interrupt flags */
#define GPIO_INTR_POS_EDGE 0x00000001 /* interrupt on rising edge */
#define GPIO_INTR_NEG_EDGE 0x00000002 /* interrupt on falling edge */
#define GPIO_INTR_DOUBLE_EDGE 0x00000004 /* interrupt on both edges */
#define GPIO_INTR_HIGH_LEVEL 0x00000008 /* interrupt on high level */
#define GPIO_INTR_LOW_LEVEL 0x00000010 /* interrupt on low level */
#define GPIO_INTR_MPSAFE 0x80000000 /* MP-safe handling */
#define GPIO_INTR_EDGE_MASK (GPIO_INTR_POS_EDGE | \
GPIO_INTR_NEG_EDGE | \
GPIO_INTR_DOUBLE_EDGE)
#define GPIO_INTR_LEVEL_MASK (GPIO_INTR_HIGH_LEVEL | \
GPIO_INTR_LOW_LEVEL)
#define GPIO_INTR_MODE_MASK (GPIO_INTR_EDGE_MASK | \
GPIO_INTR_LEVEL_MASK)
/* GPIO controller description */
struct gpio_info {
int gpio_npins; /* total number of pins available */
};
/* GPIO pin request (read/write/toggle) */
struct gpio_req {
char gp_name[GPIOMAXNAME]; /* pin name */
int gp_pin; /* pin number */
int gp_value; /* value */
};
/* GPIO pin configuration */
struct gpio_set {
char gp_name[GPIOMAXNAME];
int gp_pin;
int gp_caps;
int gp_flags;
char gp_name2[GPIOMAXNAME]; /* new name */
};
/* Attach device drivers that use GPIO pins */
struct gpio_attach {
char ga_dvname[16]; /* device name */
int ga_offset; /* pin number */
uint32_t ga_mask; /* binary mask */
uint32_t ga_flags; /* driver dependent flags */
};
/* gpio(4) API */
#define GPIOINFO _IOR('G', 0, struct gpio_info)
#define GPIOSET _IOWR('G', 5, struct gpio_set)
#define GPIOUNSET _IOWR('G', 6, struct gpio_set)
#define GPIOREAD _IOWR('G', 7, struct gpio_req)
#define GPIOWRITE _IOWR('G', 8, struct gpio_req)
#define GPIOTOGGLE _IOWR('G', 9, struct gpio_req)
#define GPIOATTACH _IOWR('G', 10, struct gpio_attach)
#ifdef COMPAT_50
/* Old structure to attach/detach devices */
struct gpio_attach50 {
char ga_dvname[16]; /* device name */
int ga_offset; /* pin number */
uint32_t ga_mask; /* binary mask */
};
/* GPIO pin control (old API) */
struct gpio_pin_ctl {
int gp_pin; /* pin number */
int gp_caps; /* pin capabilities (read-only) */
int gp_flags; /* pin configuration flags */
};
/* GPIO pin operation (read/write/toggle) (old API) */
struct gpio_pin_op {
int gp_pin; /* pin number */
int gp_value; /* value */
};
/* the old API */
#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)
#define GPIOATTACH50 _IOWR('G', 10, struct gpio_attach50)
#define GPIODETACH50 _IOWR('G', 11, struct gpio_attach50)
#define GPIODETACH _IOWR('G', 11, struct gpio_attach)
#endif /* COMPAT_50 */
#endif /* !_SYS_GPIO_H_ */
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