2 # Copyright (c) 2015 M. Warner Losh <imp@FreeBSD.org>
4 # Redistribution and use in source and binary forms, with or without
5 # modification, are permitted provided that the following conditions
7 # 1. Redistributions of source code must retain the above copyright
8 # notice, this list of conditions and the following disclaimer.
9 # 2. Redistributions in binary form must reproduce the above copyright
10 # notice, this list of conditions and the following disclaimer in the
11 # documentation and/or other materials provided with the distribution.
13 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <dev/ow/ow.h>
34 # Dallas Semiconductor 1-Wire bus network and transport layer (own)
36 # See Maxim Application Note AN937: Book of iButton Standards for the
37 # 1-Wire protocol specification.
38 # http://pdfserv.maximintegrated.com/en/an/AN937.pdf
40 # Note: 1-Wire is a registered trademark of Maxim Integrated Products, Inc.
44 # Send a command up the stack.
46 METHOD int send_command {
47 device_t ndev; /* Network (bus) level device */
48 device_t pdev; /* Device to send command for */
49 struct ow_cmd *cmd; /* Pointer to filled in command */
53 # Grab exclusive use of the bus (advisory)
55 METHOD int acquire_bus {
62 # Release exclusive use of the bus (advisory)
64 METHOD void release_bus {
70 # Compute a CRC for a given range of bytes