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gpiovar.h revision 1.14 
      1 /* $NetBSD: gpiovar.h,v 1.14 2011/10/02 09:33:19 mbalmer Exp $ */
      2 /*	$OpenBSD: gpiovar.h,v 1.3 2006/01/14 12:33:49 grange Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 2004, 2006 Alexander Yurchenko <grange (at) openbsd.org>
      6  *
      7  * Permission to use, copy, modify, and distribute this software for any
      8  * purpose with or without fee is hereby granted, provided that the above
      9  * copyright notice and this permission notice appear in all copies.
     10  *
     11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18  */
     19 
     20 #ifndef _DEV_GPIO_GPIOVAR_H_
     21 #define _DEV_GPIO_GPIOVAR_H_
     22 
     23 #include <sys/device.h>
     24 
     25 /* GPIO controller description */
     26 typedef struct gpio_chipset_tag {
     27 	void	*gp_cookie;
     28 
     29 	int	(*gp_gc_open)(void *, device_t);
     30 	void    (*gp_gc_close)(void *, device_t);
     31 	int	(*gp_pin_read)(void *, int);
     32 	void	(*gp_pin_write)(void *, int, int);
     33 	void	(*gp_pin_ctl)(void *, int, int);
     34 } *gpio_chipset_tag_t;
     35 
     36 /* GPIO pin description */
     37 typedef struct gpio_pin {
     38 	int			pin_num;	/* number */
     39 	int			pin_caps;	/* capabilities */
     40 	int			pin_flags;	/* current configuration */
     41 	int			pin_state;	/* current state */
     42 	int			pin_mapped;	/* is mapped */
     43 	callout_t		pin_pulse;	/* for pulsing */
     44 	int			pin_ticks_on;	/* "on" period */
     45 	int			pin_ticks_off;	/* "off" period */
     46 	gpio_chipset_tag_t	pin_gc;		/* reference the controller */
     47 } gpio_pin_t;
     48 
     49 /* Attach GPIO framework to the controller */
     50 struct gpiobus_attach_args {
     51 	gpio_chipset_tag_t	 gba_gc;	/* underlying controller */
     52 	gpio_pin_t		*gba_pins;	/* pins array */
     53 	int			 gba_npins;	/* total number of pins */
     54 };
     55 
     56 int gpiobus_print(void *, const char *);
     57 
     58 /* GPIO framework private methods */
     59 #define gpiobus_open(gc, dev) \
     60     ((gc)->gp_gc_open ? ((gc)->gp_gc_open((gc)->gp_cookie, dev)) : 0)
     61 #define gpiobus_close(gc, dev) \
     62     ((gc)->gp_gc_close ? ((gc)->gp_gc_close((gc)->gp_cookie, dev)), 1 : 0)
     63 #define gpiobus_pin_read(gc, pin) \
     64     ((gc)->gp_pin_read((gc)->gp_cookie, (pin)))
     65 #define gpiobus_pin_write(gc, pin, value) \
     66     ((gc)->gp_pin_write((gc)->gp_cookie, (pin), (value)))
     67 #define gpiobus_pin_ctl(gc, pin, flags) \
     68     ((gc)->gp_pin_ctl((gc)->gp_cookie, (pin), (flags)))
     69 
     70 /* Attach devices connected to the GPIO pins */
     71 struct gpio_attach_args {
     72 	void		*ga_gpio;
     73 	int		 ga_offset;
     74 	uint32_t	 ga_mask;
     75 	char		*ga_dvname;
     76 	uint32_t	 ga_flags;
     77 };
     78 
     79 /* GPIO pin map */
     80 struct gpio_pinmap {
     81 	int		*pm_map;		/* pin map */
     82 	int		 pm_size;		/* map size */
     83 };
     84 
     85 struct gpio_dev {
     86 	device_t		sc_dev;	/* the gpio device */
     87 	LIST_ENTRY(gpio_dev)	sc_next;
     88 };
     89 
     90 struct gpio_name {
     91 	char			gp_name[GPIOMAXNAME];
     92 	int			gp_pin;
     93 	LIST_ENTRY(gpio_name)	gp_next;
     94 };
     95 
     96 int	gpio_pin_can_map(void *, int, uint32_t);
     97 int	gpio_pin_map(void *, int, uint32_t, struct gpio_pinmap *);
     98 void	gpio_pin_unmap(void *, struct gpio_pinmap *);
     99 int	gpio_pin_read(void *, struct gpio_pinmap *, int);
    100 void	gpio_pin_write(void *, struct gpio_pinmap *, int, int);
    101 void	gpio_pin_ctl(void *, struct gpio_pinmap *, int, int);
    102 int	gpio_pin_caps(void *, struct gpio_pinmap *, int);
    103 int	gpio_npins(uint32_t);
    104 
    105 int	gpio_lock(void *);
    106 void	gpio_unlock(void *);
    107 
    108 #endif	/* !_DEV_GPIO_GPIOVAR_H_ */
    109