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 210998 2010-08-07 08:31:32Z joel $ 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 */ 35 struct 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 47 struct iiccmd { 48 u_char slave; 49 int count; 50 int last; 51 char *buf; 52 }; 53 54 struct 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 67 #endif 68