iic.h revision 289666 
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: stable/10/sys/dev/iicbus/iic.h 289666 2015-10-20 21:20:34Z ian $
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_WR	0	/* Fake flag for write */
40#define	IIC_M_RD	0x0001	/* read vs write */
41#define	IIC_M_NOSTOP	0x0002	/* do not send a I2C stop after message */
42#define	IIC_M_NOSTART	0x0004	/* do not send a I2C start before message */
43	uint16_t	len;	/* msg length */
44	uint8_t *	buf;
45};
46
47struct iiccmd {
48	u_char slave;
49	int count;
50	int last;
51	char *buf;
52};
53
54struct iic_rdwr_data {
55	struct iic_msg *msgs;
56	uint32_t nmsgs;
57};
58
59#define I2CSTART	_IOW('i', 1, struct iiccmd)	/* start condition */
60#define I2CSTOP		_IO('i', 2)			/* stop condition */
61#define I2CRSTCARD	_IOW('i', 3, struct iiccmd)	/* reset the card */
62#define I2CWRITE	_IOW('i', 4, struct iiccmd)	/* send data */
63#define I2CREAD		_IOW('i', 5, struct iiccmd)	/* receive data */
64#define I2CRDWR		_IOW('i', 6, struct iic_rdwr_data)	/* General read/write interface */
65#define I2CRPTSTART	_IOW('i', 7, struct iiccmd)	/* repeated start */
66#define I2CSADDR	_IOW('i', 8, uint8_t)		/* set slave address for future I/O */
67
68#endif
69