1 /* 2 * Copyright (c) 2013-2016 François Tigeot 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 unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_I2C_H_ 28 #define _LINUX_I2C_H_ 29 30 #include <linux/mod_devicetable.h> 31 #include <linux/device.h> /* for struct device */ 32 #include <linux/sched.h> /* for completion */ 33 #include <linux/mutex.h> 34 #include <uapi_linux/i2c.h> 35 36 #include <bus/iicbus/iic.h> 37 #include <bus/iicbus/iiconf.h> 38 #include "iicbus_if.h" 39 40 #define I2C_M_RD IIC_M_RD 41 #define I2C_M_NOSTART IIC_M_NOSTART 42 43 struct i2c_adapter { 44 const struct i2c_algorithm *algo; 45 void *algo_data; 46 47 int timeout; 48 int retries; 49 struct device dev; 50 51 char name[48]; 52 }; 53 54 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, 55 int num); 56 57 struct i2c_algorithm { 58 int (*master_xfer)(struct i2c_adapter *adap, struct i2c_msg *msgs, 59 int num); 60 61 u32 (*functionality) (struct i2c_adapter *); 62 }; 63 64 extern int i2c_add_adapter(struct i2c_adapter *); 65 extern void i2c_del_adapter(struct i2c_adapter *); 66 67 #endif /* _LINUX_I2C_H_ */ 68