smb.h revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1998 Nicolas Souchu
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/sys/dev/smbus/smb.h 330897 2018-03-14 03:19:51Z eadler $
29 *
30 */
31#ifndef __SMB_H
32#define __SMB_H
33
34#include <sys/ioccom.h>
35
36struct smbcmd {
37	u_char cmd;
38	u_char reserved;
39	u_short op;
40	union {
41		char	byte;
42		char	buf[2];
43		short	word;
44	} wdata;
45	union {
46		char	byte;
47		char	buf[2];
48		short	word;
49	} rdata;
50	int  slave;
51	char *wbuf;	/* use wdata if NULL */
52	int  wcount;
53	char *rbuf;	/* use rdata if NULL */
54	int  rcount;
55};
56
57/*
58 * SMBus spec 2.0 says block transfers may be at most 32 bytes.
59 */
60#define SMB_MAXBLOCKSIZE	32
61
62#define SMB_QUICK_WRITE	_IOW('i', 1, struct smbcmd)
63#define SMB_QUICK_READ	_IOW('i', 2, struct smbcmd)
64#define SMB_SENDB	_IOW('i', 3, struct smbcmd)
65#define SMB_RECVB	_IOWR('i', 4, struct smbcmd)
66#define SMB_WRITEB	_IOW('i', 5, struct smbcmd)
67#define SMB_WRITEW	_IOW('i', 6, struct smbcmd)
68#define SMB_READB	_IOWR('i', 7, struct smbcmd)
69#define SMB_READW	_IOWR('i', 8, struct smbcmd)
70#define SMB_PCALL	_IOWR('i', 9, struct smbcmd)
71#define SMB_BWRITE	_IOW('i', 10, struct smbcmd)
72#define SMB_BREAD	_IOWR('i', 11, struct smbcmd)
73#define SMB_OLD_TRANS	_IOWR('i', 12, struct smbcmd)
74
75#endif
76