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/* $OpenBSD: onewirereg.h,v 1.2 2009/06/02 18:19:47 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_ONEWIREREG_H_
#define _DEV_ONEWIRE_ONEWIREREG_H_
/*
* 1-Wire bus protocol definitions.
*/
/*
* 64-bit ROM section.
*/
/* Family code */
#define ONEWIRE_ROM_FAMILY(x) ((u_char)(x) & 0xff)
#define ONEWIRE_ROM_FAMILY_TYPE(x) ((u_char)(x) & 0x7f)
#define ONEWIRE_ROM_FAMILY_CUSTOM(x) ((u_char)((x) >> 7) & 0x1)
/* Serial number */
#define ONEWIRE_ROM_SN(x) (((x) >> 8) & 0xffffffffffffULL)
/* CRC */
#define ONEWIRE_ROM_CRC(x) (((x) >> 56) & 0xff)
/*
* Command set.
*/
/* ROM commands */
#define ONEWIRE_CMD_READ_ROM 0x33
#define ONEWIRE_CMD_SKIP_ROM 0xcc
#define ONEWIRE_CMD_MATCH_ROM 0x55
#define ONEWIRE_CMD_SEARCH_ROM 0xf0
#define ONEWIRE_CMD_OVERDRIVE_SKIP_ROM 0x3c
#define ONEWIRE_CMD_OVERDRIVE_MATCH_ROM 0x69
/* Scratchpad commands */
#define ONEWIRE_CMD_READ_SCRATCHPAD 0xaa
#define ONEWIRE_CMD_WRITE_SCRATCHPAD 0x0f
#define ONEWIRE_CMD_COPY_SCRATCHPAD 0x55
/* Memory commands */
#define ONEWIRE_CMD_READ_MEMORY 0xf0
#define ONEWIRE_CMD_WRITE_MEMORY 0x0f
#define ONEWIRE_CMD_EXT_READ_MEMORY 0xa5
/* Password commands */
#define ONEWIRE_CMD_READ_SUBKEY 0x66
#define ONEWIRE_CMD_WRITE_SUBKEY 0x99
#define ONEWIRE_CMD_WRITE_PASSWORD 0x5a
/* Status commands */
#define ONEWIRE_CMD_READ_STATUS 0xaa
#define ONEWIRE_CMD_WRITE_STATUS 0x55
#endif /* !_DEV_ONEWIRE_ONEWIREREG_H_ */
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