xref: /freebsd/sys/dev/ow/own_if.m (revision 0957b409) 
1#-
2# Copyright (c) 2015 M. Warner Losh <imp@freebsd.org>
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
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.
13#
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
24# SUCH DAMAGE.
25#
26# $FreeBSD$
27#
28
29#include <sys/bus.h>
30#include <dev/ow/ow.h>
31
32INTERFACE own;
33
34#
35# Dallas Semiconductor 1-Wire bus network and transport layer (own)
36#
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
40#
41# Note: 1-Wire is a registered trademark of Maxim Integrated Products, Inc.
42#
43
44#
45# Send a command up the stack.
46#
47METHOD 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 */
51};
52
53#
54# Grab exclusive use of the bus (advisory)
55#
56METHOD int acquire_bus {
57	device_t	ndev;
58	device_t	pdev;
59	int		how;
60};
61
62#
63# Release exclusive use of the bus (advisory)
64#
65METHOD void release_bus {
66	device_t	ndev;
67	device_t	pdev;
68};
69
70#
71# Compute a CRC for a given range of bytes
72#
73METHOD uint8_t crc {
74	device_t	ndev;
75	device_t	pdev;
76	uint8_t		*buffer;
77	size_t		len;
78};
79