Home | History | Annotate | Line # | Download | only in onewire 
      1 /*	$NetBSD: onewirereg.h,v 1.4 2019/10/25 16:25:14 martin Exp $	*/
      2 /*	$OpenBSD: onewirereg.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_ONEWIREREG_H_
     21 #define _DEV_ONEWIRE_ONEWIREREG_H_
     22 
     23 /*
     24  * 1-Wire bus protocol definitions.
     25  */
     26 
     27 /*
     28  * 64-bit ROM section.
     29  */
     30 
     31 /* Family code */
     32 #define ONEWIRE_ROM_FAMILY(x)		((x) & 0xff)
     33 #define ONEWIRE_ROM_FAMILY_TYPE(x)	((x) & 0x7f)
     34 #define ONEWIRE_ROM_FAMILY_CUSTOM(x)	(((x) >> 7) & 0x1)
     35 
     36 /* Serial number */
     37 #define ONEWIRE_ROM_SN(x)		(((x) >> 8) & ((uint64_t)0xffffffffffffULL))
     38 
     39 /* CRC */
     40 #define ONEWIRE_ROM_CRC(x)		(((x) >> 56) & 0xff)
     41 
     42 /*
     43  * Command set.
     44  */
     45 
     46 /* ROM commands */
     47 #define ONEWIRE_CMD_READ_ROM		0x33
     48 #define ONEWIRE_CMD_SKIP_ROM		0xcc
     49 #define ONEWIRE_CMD_MATCH_ROM		0x55
     50 #define ONEWIRE_CMD_SEARCH_ROM		0xf0
     51 #define ONEWIRE_CMD_OVERDRIVE_SKIP_ROM	0x3c
     52 #define ONEWIRE_CMD_OVERDRIVE_MATCH_ROM	0x69
     53 
     54 /* Scratchpad commands */
     55 #define ONEWIRE_CMD_READ_SCRATCHPAD	0xaa
     56 #define ONEWIRE_CMD_WRITE_SCRATCHPAD	0x0f
     57 #define ONEWIRE_CMD_COPY_SCRATCHPAD	0x55
     58 
     59 /* Memory commands */
     60 #define ONEWIRE_CMD_READ_MEMORY		0xf0
     61 #define ONEWIRE_CMD_WRITE_MEMORY	0x0f
     62 #define ONEWIRE_CMD_EXT_READ_MEMORY	0xa5
     63 
     64 /* Password commands */
     65 #define ONEWIRE_CMD_READ_SUBKEY		0x66
     66 #define ONEWIRE_CMD_WRITE_SUBKEY	0x99
     67 #define ONEWIRE_CMD_WRITE_PASSWORD	0x5a
     68 
     69 /* Status commands */
     70 #define ONEWIRE_CMD_READ_STATUS		0xaa
     71 #define ONEWIRE_CMD_WRITE_STATUS	0x55
     72 
     73 #endif	/* !_DEV_ONEWIRE_ONEWIREREG_H_ */
     74