iic.h revision 160372
1/*-
2 * Copyright (c) 1998 Nicolas Souchu
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: head/sys/dev/iicbus/iic.h 160372 2006-07-14 23:15:06Z imp $
27 *
28 */
29#ifndef __IIC_H
30#define __IIC_H
31
32#include <sys/ioccom.h>
33
34/* Designed to be compatible with linux's struct i2c_msg */
35struct iic_msg
36{
37	uint16_t	slave;
38	uint16_t	flags;
39#define IIC_M_RD	0x0001	/* read vs write */
40	uint16_t	len;	/* msg legnth */
41	uint8_t *	buf;
42};
43
44struct iiccmd {
45	u_char slave;
46	int count;
47	int last;
48	char *buf;
49};
50
51struct iic_rdwr_data {
52	struct iic_msg *msgs;
53	uint32_t nmsgs;
54};
55
56#define I2CSTART	_IOW('i', 1, struct iiccmd)	/* start condition */
57#define I2CSTOP		_IO('i', 2)			/* stop condition */
58#define I2CRSTCARD	_IOW('i', 3, struct iiccmd)	/* reset the card */
59#define I2CWRITE	_IOW('i', 4, struct iiccmd)	/* send data */
60#define I2CREAD		_IOW('i', 5, struct iiccmd)	/* receive data */
61#define I2CRDWR		_IOW('i', 6, struct iic_rdwr_data)	/* General read/write interface */
62
63#endif
64