102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/* $NetBSD: gpiovar.h,v 1.10 2009/08/21 12:53:42 mbalmer Exp $ */
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/* $OpenBSD: gpiovar.h,v 1.3 2006/01/14 12:33:49 grange Exp $ */
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/*
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* Copyright (c) 2004, 2006 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 _DEV_GPIO_GPIOVAR_H_
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#define _DEV_GPIO_GPIOVAR_H_
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#include <sys/device.h>
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/* GPIO controller description */
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typedef struct gpio_chipset_tag {
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void *gp_cookie;
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int (*gp_gc_open)(void *, device_t);
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void (*gp_gc_close)(void *, device_t);
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int (*gp_pin_read)(void *, int);
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void (*gp_pin_write)(void *, int, int);
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void (*gp_pin_ctl)(void *, int, int);
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} *gpio_chipset_tag_t;
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/* GPIO pin description */
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typedef struct gpio_pin {
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int pin_num; /* number */
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int pin_caps; /* capabilities */
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int pin_flags; /* current configuration */
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int pin_state; /* current state */
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int pin_mapped; /* is mapped */
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} gpio_pin_t;
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/* Attach GPIO framework to the controller */
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struct gpiobus_attach_args {
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gpio_chipset_tag_t gba_gc; /* underlying controller */
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gpio_pin_t *gba_pins; /* pins array */
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int gba_npins; /* total number of pins */
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};
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int gpiobus_print(void *, const char *);
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/* GPIO framework private methods */
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#define gpiobus_open(gc, dev) \
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((gc)->gp_gc_open ? ((gc)->gp_gc_open((gc)->gp_cookie, dev)) : 0)
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#define gpiobus_close(gc, dev) \
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((gc)->gp_gc_close ? ((gc)->gp_gc_close((gc)->gp_cookie, dev)), 1 : 0)
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#define gpiobus_pin_read(gc, pin) \
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((gc)->gp_pin_read((gc)->gp_cookie, (pin)))
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#define gpiobus_pin_write(gc, pin, value) \
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((gc)->gp_pin_write((gc)->gp_cookie, (pin), (value)))
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#define gpiobus_pin_ctl(gc, pin, flags) \
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((gc)->gp_pin_ctl((gc)->gp_cookie, (pin), (flags)))
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/* Attach devices connected to the GPIO pins */
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struct gpio_attach_args {
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void * ga_gpio;
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int ga_offset;
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u_int32_t ga_mask;
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char *ga_dvname;
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};
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/* GPIO pin map */
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struct gpio_pinmap {
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int * pm_map; /* pin map */
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int pm_size; /* map size */
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};
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struct gpio_dev {
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device_t sc_dev; /* the gpio device */
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LIST_ENTRY(gpio_dev) sc_next;
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};
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struct gpio_name {
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char gp_name[GPIOMAXNAME];
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int gp_pin;
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LIST_ENTRY(gpio_name) gp_next;
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};
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int gpio_pin_can_map(void *, int, u_int32_t);
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int gpio_pin_map(void *, int, u_int32_t, struct gpio_pinmap *);
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void gpio_pin_unmap(void *, struct gpio_pinmap *);
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int gpio_pin_read(void *, struct gpio_pinmap *, int);
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void gpio_pin_write(void *, struct gpio_pinmap *, int, int);
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void gpio_pin_ctl(void *, struct gpio_pinmap *, int, int);
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int gpio_pin_caps(void *, struct gpio_pinmap *, int);
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int gpio_npins(u_int32_t);
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#endif /* !_DEV_GPIO_GPIOVAR_H_ */
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