i2c.h

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/*
 * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Dornierstr. 4
 *  82178 Puchheim
 *  Germany
 *  <rtems@embedded-brains.de>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */
 
#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 */