1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 */
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 IIC_RDRW_MAX_MSGS 42
60
61#define I2CSTART _IOW('i', 1, struct iiccmd) /* start condition */
62#define I2CSTOP _IO('i', 2) /* stop condition */
63#define I2CRSTCARD _IOW('i', 3, struct iiccmd) /* reset the card */
64#define I2CWRITE _IOW('i', 4, struct iiccmd) /* send data */
65#define I2CREAD _IOW('i', 5, struct iiccmd) /* receive data */
66#define I2CRDWR _IOW('i', 6, struct iic_rdwr_data) /* General read/write interface */
67#define I2CRPTSTART _IOW('i', 7, struct iiccmd) /* repeated start */
68#define I2CSADDR _IOW('i', 8, uint8_t) /* set slave address for future I/O */
69
70#endif