1 /* $OpenBSD: onewirereg.h,v 1.1 2006/03/04 16:27:03 grange Exp $ */
2
3 /*
4 * Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #ifndef _DEV_ONEWIRE_ONEWIREREG_H_
20 #define _DEV_ONEWIRE_ONEWIREREG_H_
21
22 /*
23 * 1-Wire bus protocol definitions.
24 */
25
26 /*
27 * 64-bit ROM section.
28 */
29
30 /* Family code */
31 #define ONEWIRE_ROM_FAMILY(x) ((x) & 0xff)
32 #define ONEWIRE_ROM_FAMILY_TYPE(x) ((x) & 0x7f)
33 #define ONEWIRE_ROM_FAMILY_CUSTOM(x) (((x) >> 7) & 0x1)
34
35 /* Serial number */
36 #define ONEWIRE_ROM_SN(x) (((x) >> 8) & 0xffffffffffffULL)
37
38 /* CRC */
39 #define ONEWIRE_ROM_CRC(x) (((x) >> 56) & 0xff)
40
41 /*
42 * Command set.
43 */
44
45 /* ROM commands */
46 #define ONEWIRE_CMD_READ_ROM 0x33
47 #define ONEWIRE_CMD_SKIP_ROM 0xcc
48 #define ONEWIRE_CMD_MATCH_ROM 0x55
49 #define ONEWIRE_CMD_SEARCH_ROM 0xf0
50 #define ONEWIRE_CMD_OVERDRIVE_SKIP_ROM 0x3c
51 #define ONEWIRE_CMD_OVERDRIVE_MATCH_ROM 0x69
52
53 /* Scratchpad commands */
54 #define ONEWIRE_CMD_READ_SCRATCHPAD 0xaa
55 #define ONEWIRE_CMD_WRITE_SCRATCHPAD 0x0f
56 #define ONEWIRE_CMD_COPY_SCRATCHPAD 0x55
57
58 /* Memory commands */
59 #define ONEWIRE_CMD_READ_MEMORY 0xf0
60 #define ONEWIRE_CMD_WRITE_MEMORY 0x0f
61 #define ONEWIRE_CMD_EXT_READ_MEMORY 0xa5
62
63 /* Password commands */
64 #define ONEWIRE_CMD_READ_SUBKEY 0x66
65 #define ONEWIRE_CMD_WRITE_SUBKEY 0x99
66 #define ONEWIRE_CMD_WRITE_PASSWORD 0x5a
67
68 /* Status commands */
69 #define ONEWIRE_CMD_READ_STATUS 0xaa
70 #define ONEWIRE_CMD_WRITE_STATUS 0x55
71
72 #endif /* !_DEV_ONEWIRE_ONEWIREREG_H_ */