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 * $FreeBSD$ 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 */ 37 struct 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 49 struct iiccmd { 50 u_char slave; 51 int count; 52 int last; 53 char *buf; 54 }; 55 56 struct 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