i2c.h

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/* SPDX-License-Identifier: BSD-2-Clause */

 
/*
 * Copyright (c) 2014 embedded brains GmbH & Co. KG
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef _UAPI_LINUX_I2C_H
#define _UAPI_LINUX_I2C_H
 
#include <stdint.h>



#define I2C_M_TEN 0x0010

#define I2C_M_RD 0x0001

#define I2C_M_STOP 0x8000

#define I2C_M_NOSTART 0x4000

#define I2C_M_REV_DIR_ADDR 0x2000

#define I2C_M_IGNORE_NAK 0x1000

#define I2C_M_NO_RD_ACK 0x0800

#define I2C_M_RECV_LEN 0x0400


struct i2c_msg {
  uint16_t addr;

  uint16_t flags;

  uint16_t len;

  uint8_t *buf;
};

 
#define I2C_FUNC_I2C 0x00000001
#define I2C_FUNC_10BIT_ADDR 0x00000002
#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004
#define I2C_FUNC_SMBUS_PEC 0x00000008
#define I2C_FUNC_NOSTART 0x00000010
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000
#define I2C_FUNC_SMBUS_QUICK 0x00010000
#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000
 
#define I2C_FUNC_SMBUS_BYTE \
  (I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE)
 
#define I2C_FUNC_SMBUS_BYTE_DATA \
  (I2C_FUNC_SMBUS_READ_BYTE_DATA | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
 
#define I2C_FUNC_SMBUS_WORD_DATA \
  (I2C_FUNC_SMBUS_READ_WORD_DATA | I2C_FUNC_SMBUS_WRITE_WORD_DATA)
 
#define I2C_FUNC_SMBUS_BLOCK_DATA \
  (I2C_FUNC_SMBUS_READ_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
 
#define I2C_FUNC_SMBUS_I2C_BLOCK \
  (I2C_FUNC_SMBUS_READ_I2C_BLOCK | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
 
#define I2C_FUNC_SMBUS_EMUL \
  (I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA \
    | I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_PROC_CALL \
    | I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | I2C_FUNC_SMBUS_I2C_BLOCK \
    | I2C_FUNC_SMBUS_PEC)


#define I2C_SMBUS_BLOCK_MAX 32

union i2c_smbus_data {
  uint8_t byte;
  uint16_t word;
  uint8_t block[I2C_SMBUS_BLOCK_MAX + 2];
};

 
#define I2C_SMBUS_READ 1
 
#define I2C_SMBUS_WRITE 0


 
#define I2C_SMBUS_QUICK 0
 
#define I2C_SMBUS_BYTE 1
 
#define I2C_SMBUS_BYTE_DATA 2
 
#define I2C_SMBUS_WORD_DATA 3
 
#define I2C_SMBUS_PROC_CALL 4
 
#define I2C_SMBUS_BLOCK_DATA 5
 
#define I2C_SMBUS_I2C_BLOCK_BROKEN 6
 
#define I2C_SMBUS_BLOCK_PROC_CALL 7
 
#define I2C_SMBUS_I2C_BLOCK_DATA 8


 
#endif /* _UAPI_LINUX_I2C_H */