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onewirevar.h revision 1.6 
      1 /* $NetBSD: onewirevar.h,v 1.6 2019/11/30 23:04:12 ad Exp $ */
      2 /*	$OpenBSD: onewirevar.h,v 1.1 2006/03/04 16:27:03 grange Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 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_ONEWIRE_ONEWIREVAR_H_
     21 #define _DEV_ONEWIRE_ONEWIREVAR_H_
     22 
     23 /*
     24  * 1-Wire bus interface.
     25  */
     26 
     27 /* Bus master interface */
     28 struct onewire_bus {
     29 	void *	bus_cookie;
     30 
     31 	int	(*bus_reset)(void *);
     32 	int	(*bus_read_bit)(void *);
     33 	void	(*bus_write_bit)(void *, int);
     34 	int	(*bus_read_byte)(void *);
     35 	void	(*bus_write_byte)(void *, int);
     36 	int	(*bus_triplet)(void *, int);
     37 };
     38 
     39 /* Bus methods */
     40 void		onewire_lock(void *);
     41 void		onewire_unlock(void *);
     42 int		onewire_reset(void *);
     43 int		onewire_read_bit(void *);
     44 void		onewire_write_bit(void *, int);
     45 int		onewire_read_byte(void *);
     46 void		onewire_write_byte(void *, int);
     47 int		onewire_triplet(void *, int);
     48 void		onewire_read_block(void *, void *, int);
     49 void		onewire_write_block(void *, const void *, int);
     50 void		onewire_matchrom(void *, u_int64_t);
     51 
     52 /* Bus attachment */
     53 struct onewirebus_attach_args {
     54 	struct onewire_bus *	oba_bus;
     55 };
     56 
     57 int	onewirebus_print(void *, const char *);
     58 
     59 /* Device attachment */
     60 struct onewire_attach_args {
     61 	void *			oa_onewire;
     62 	u_int64_t		oa_rom;
     63 };
     64 
     65 /* Family matching */
     66 struct onewire_matchfam {
     67 	int om_type;
     68 };
     69 
     70 /* Miscellaneous routines */
     71 int		onewire_crc(const void *, int);
     72 const char *	onewire_famname(int);
     73 int		onewire_matchbyfam(struct onewire_attach_args *,
     74 		    const struct onewire_matchfam *, int);
     75 
     76 /* Bus bit-banging */
     77 struct onewire_bbops {
     78 	void	(*bb_rx)(void *);
     79 	void	(*bb_tx)(void *);
     80 	int	(*bb_get)(void *);
     81 	void	(*bb_set)(void *, int);
     82 };
     83 
     84 int		onewire_bb_reset(const struct onewire_bbops *, void *);
     85 int		onewire_bb_read_bit(const struct onewire_bbops *, void *);
     86 void		onewire_bb_write_bit(const struct onewire_bbops *, void *, int);
     87 
     88 #endif	/* !_DEV_ONEWIRE_ONEWIREVAR_H_ */
     89