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/* $OpenBSD: gpiovar.h,v 1.5 2008/11/26 14:51:20 mbalmer Exp $ */
/*
* Copyright (c) 2004, 2006 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 _DEV_GPIO_GPIOVAR_H_
#define _DEV_GPIO_GPIOVAR_H_
/* GPIO controller description */
typedef struct gpio_chipset_tag {
void *gp_cookie;
int (*gp_pin_read)(void *, int);
void (*gp_pin_write)(void *, int, int);
void (*gp_pin_ctl)(void *, int, int);
} *gpio_chipset_tag_t;
/* GPIO pin description */
typedef struct gpio_pin {
int pin_num; /* number */
int pin_caps; /* capabilities */
int pin_flags; /* current configuration */
int pin_state; /* current state */
int pin_mapped; /* is mapped */
} gpio_pin_t;
/* Attach GPIO framework to the controller */
struct gpiobus_attach_args {
const char *gba_name; /* bus name */
gpio_chipset_tag_t gba_gc; /* underlying controller */
gpio_pin_t *gba_pins; /* pins array */
int gba_npins; /* total number of pins */
};
int gpiobus_print(void *, const char *);
/* GPIO framework private methods */
#define gpiobus_pin_read(gc, pin) \
((gc)->gp_pin_read((gc)->gp_cookie, (pin)))
#define gpiobus_pin_write(gc, pin, value) \
((gc)->gp_pin_write((gc)->gp_cookie, (pin), (value)))
#define gpiobus_pin_ctl(gc, pin, flags) \
((gc)->gp_pin_ctl((gc)->gp_cookie, (pin), (flags)))
/* Attach devices connected to the GPIO pins */
struct gpio_attach_args {
void * ga_gpio;
int ga_offset;
u_int32_t ga_mask;
char *ga_dvname;
};
/* GPIO pin map */
struct gpio_pinmap {
int * pm_map; /* pin map */
int pm_size; /* map size */
};
struct gpio_dev {
struct device *sc_dev; /* the gpio device */
LIST_ENTRY(gpio_dev) sc_next;
};
struct gpio_name {
char gp_name[GPIOPINMAXNAME];
int gp_pin;
LIST_ENTRY(gpio_name) gp_next;
};
int gpio_pin_map(void *, int, u_int32_t, struct gpio_pinmap *);
void gpio_pin_unmap(void *, struct gpio_pinmap *);
int gpio_pin_read(void *, struct gpio_pinmap *, int);
void gpio_pin_write(void *, struct gpio_pinmap *, int, int);
void gpio_pin_ctl(void *, struct gpio_pinmap *, int, int);
int gpio_pin_caps(void *, struct gpio_pinmap *, int);
int gpio_npins(u_int32_t);
#endif /* !_DEV_GPIO_GPIOVAR_H_ */
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