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