/* $OpenBSD: gpiovar.h,v 1.6 2011/10/03 20:24:51 matthieu 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; u_int32_t ga_flags; }; /* 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_ */