2 * Copyright (c) 2016-2017 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef __PERIPHERAL_INTERFACE_I2C_H__
18 #define __PERIPHERAL_INTERFACE_I2C_H__
20 #include "peripheral_interface_common.h"
22 #define I2C_BUFFER_MAX 64
24 #define I2C_SLAVE 0x0703 /* Use this slave address */
25 #define I2C_SMBUS 0x0720 /* SMBus transfer */
27 /* i2c_smbus_xfer read or write markers */
28 #define I2C_SMBUS_READ 1
29 #define I2C_SMBUS_WRITE 0
31 /* SMBus transaction types */
32 #define I2C_SMBUS_QUICK 0
33 #define I2C_SMBUS_BYTE 1
34 #define I2C_SMBUS_BYTE_DATA 2
35 #define I2C_SMBUS_WORD_DATA 3
38 * Data for SMBus Messages
40 #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
42 union i2c_smbus_data {
45 uint8_t block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
46 /* and one more for user-space compatibility */
49 /* This is the structure as used in the I2C_SMBUS ioctl call */
50 struct i2c_smbus_ioctl_data {
54 union i2c_smbus_data *data;
57 void peripheral_interface_i2c_close(peripheral_i2c_h i2c);
58 int peripheral_interface_i2c_read(peripheral_i2c_h i2c, uint8_t *data, uint32_t length);
59 int peripheral_interface_i2c_write(peripheral_i2c_h i2c, uint8_t *data, uint32_t length);
60 int peripheral_interface_i2c_read_register_byte(peripheral_i2c_h i2c, uint8_t reg, uint8_t *data_out);
61 int peripheral_interface_i2c_write_register_byte(peripheral_i2c_h i2c, uint8_t reg, uint8_t data_in);
62 int peripheral_interface_i2c_read_register_word(peripheral_i2c_h i2c, uint8_t reg, uint16_t *data_out);
63 int peripheral_interface_i2c_write_register_word(peripheral_i2c_h i2c, uint8_t reg, uint16_t data_in);
65 #endif /* __PERIPHERAL_INTERFACE_I2C_H__ */