1 /* $OpenBSD: i2c.h,v 1.1 2019/04/14 10:14:53 jsg Exp $ */ 2 /* 3 * Copyright (c) 2017 Mark Kettenis 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef _LINUX_I2C_H 19 #define _LINUX_I2C_H 20 21 #include <sys/stdint.h> 22 #include <sys/rwlock.h> 23 #include <linux/workqueue.h> 24 #include <linux/seq_file.h> 25 26 #include <dev/i2c/i2cvar.h> 27 28 struct i2c_algorithm; 29 30 #define I2C_FUNC_I2C 0 31 #define I2C_FUNC_SMBUS_EMUL 0 32 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0 33 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0 34 #define I2C_FUNC_10BIT_ADDR 0 35 36 struct i2c_adapter { 37 struct i2c_controller ic; 38 39 char name[48]; 40 const struct i2c_algorithm *algo; 41 void *algo_data; 42 int retries; 43 44 void *data; 45 }; 46 47 #define I2C_NAME_SIZE 20 48 49 struct i2c_msg { 50 uint16_t addr; 51 uint16_t flags; 52 uint16_t len; 53 uint8_t *buf; 54 }; 55 56 #define I2C_M_RD 0x0001 57 #define I2C_M_NOSTART 0x0002 58 #define I2C_M_STOP 0x0004 59 60 struct i2c_algorithm { 61 int (*master_xfer)(struct i2c_adapter *, struct i2c_msg *, int); 62 uint32_t (*functionality)(struct i2c_adapter *); 63 }; 64 65 extern struct i2c_algorithm i2c_bit_algo; 66 67 struct i2c_algo_bit_data { 68 struct i2c_controller ic; 69 }; 70 71 int i2c_transfer(struct i2c_adapter *, struct i2c_msg *, int); 72 #define i2c_add_adapter(x) 0 73 #define i2c_del_adapter(x) 74 #define __i2c_transfer(adap, msgs, num) i2c_transfer(adap, msgs, num) 75 76 static inline void * 77 i2c_get_adapdata(struct i2c_adapter *adap) 78 { 79 return adap->data; 80 } 81 82 static inline void 83 i2c_set_adapdata(struct i2c_adapter *adap, void *data) 84 { 85 adap->data = data; 86 } 87 88 int i2c_bit_add_bus(struct i2c_adapter *); 89 90 #endif 91