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/* $OpenBSD: onewirevar.h,v 1.7 2010/07/19 23:44:09 deraadt Exp $ */
/*
* Copyright (c) 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_ONEWIRE_ONEWIREVAR_H_
#define _DEV_ONEWIRE_ONEWIREVAR_H_
/*
* 1-Wire bus interface.
*/
/* Bus master interface */
struct onewire_bus {
void * bus_cookie;
int (*bus_reset)(void *);
int (*bus_bit)(void *, int);
int (*bus_read_byte)(void *);
void (*bus_write_byte)(void *, int);
void (*bus_read_block)(void *, void *, int);
void (*bus_write_block)(void *, const void *, int);
int (*bus_triplet)(void *, int);
void (*bus_matchrom)(void *, u_int64_t);
int (*bus_search)(void *, u_int64_t *, int, u_int64_t);
};
/* Bus methods */
int onewire_lock(void *, int);
void onewire_unlock(void *);
int onewire_reset(void *);
int onewire_bit(void *, int);
int onewire_read_byte(void *);
void onewire_write_byte(void *, int);
void onewire_read_block(void *, void *, int);
void onewire_write_block(void *, const void *, int);
int onewire_triplet(void *, int);
void onewire_matchrom(void *, u_int64_t);
int onewire_search(void *, u_int64_t *, int, u_int64_t);
#define ONEWIRE_NOWAIT 0x0001
/* Bus attachment */
struct onewirebus_attach_args {
struct onewire_bus * oba_bus;
int oba_flags;
#define ONEWIRE_SCAN_NOW 0x0001
#define ONEWIRE_NO_PERIODIC_SCAN 0x0002
};
int onewirebus_print(void *, const char *);
/* Device attachment */
struct onewire_attach_args {
void * oa_onewire;
u_int64_t oa_rom;
};
/* Family matching */
struct onewire_matchfam {
int om_type;
};
/* Miscellaneous routines */
int onewire_crc(const void *, int);
u_int16_t onewire_crc16(const void *, int);
const char * onewire_famname(int);
int onewire_matchbyfam(struct onewire_attach_args *,
const struct onewire_matchfam *, int);
/* Bus bit-banging */
struct onewire_bbops {
void (*bb_rx)(void *);
void (*bb_tx)(void *);
int (*bb_get)(void *);
void (*bb_set)(void *, int);
};
int onewire_bb_reset(const struct onewire_bbops *, void *);
int onewire_bb_bit(const struct onewire_bbops *, void *, int);
#endif /* !_DEV_ONEWIRE_ONEWIREVAR_H_ */
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