iic.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/iicbus/iic.h 330897 2018-03-14 03:19:51Z eadler $
29 *
30 */
31#ifndef __IIC_H
32#define __IIC_H
33
34#include <sys/ioccom.h>
35
36/* Designed to be compatible with linux's struct i2c_msg */
37struct iic_msg
38{
39	uint16_t	slave;
40	uint16_t	flags;
41#define	IIC_M_WR	0	/* Fake flag for write */
42#define	IIC_M_RD	0x0001	/* read vs write */
43#define	IIC_M_NOSTOP	0x0002	/* do not send a I2C stop after message */
44#define	IIC_M_NOSTART	0x0004	/* do not send a I2C start before message */
45	uint16_t	len;	/* msg length */
46	uint8_t *	buf;
47};
48
49struct iiccmd {
50	u_char slave;
51	int count;
52	int last;
53	char *buf;
54};
55
56struct iic_rdwr_data {
57	struct iic_msg *msgs;
58	uint32_t nmsgs;
59};
60
61#define IIC_RDRW_MAX_MSGS	42
62
63#define I2CSTART	_IOW('i', 1, struct iiccmd)	/* start condition */
64#define I2CSTOP		_IO('i', 2)			/* stop condition */
65#define I2CRSTCARD	_IOW('i', 3, struct iiccmd)	/* reset the card */
66#define I2CWRITE	_IOW('i', 4, struct iiccmd)	/* send data */
67#define I2CREAD		_IOW('i', 5, struct iiccmd)	/* receive data */
68#define I2CRDWR		_IOW('i', 6, struct iic_rdwr_data)	/* General read/write interface */
69#define I2CRPTSTART	_IOW('i', 7, struct iiccmd)	/* repeated start */
70#define I2CSADDR	_IOW('i', 8, uint8_t)		/* set slave address for future I/O */
71
72#endif
73