sys/dev/onewire/onewirereg.h

   1 /* $NetBSD: onewirereg.h,v 1.2 2006/04/08 23:41:46 riz 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@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) & 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_ */