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.
22 #include "peripheral_io.h"
24 #define SYSFS_I2C_DIR "/dev/i2c"
25 #define I2C_BUFFER_MAX 64
27 #define I2C_SLAVE 0x0703 /* Use this slave address */
28 #define I2C_SMBUS 0x0720 /* SMBus transfer */
30 /* i2c_smbus_xfer read or write markers */
31 #define I2C_SMBUS_READ 1
32 #define I2C_SMBUS_WRITE 0
34 /* SMBus transaction types */
35 #define I2C_SMBUS_QUICK 0
36 #define I2C_SMBUS_BYTE 1
37 #define I2C_SMBUS_BYTE_DATA 2
38 #define I2C_SMBUS_WORD_DATA 3
41 * Data for SMBus Messages
43 #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
45 union i2c_smbus_data {
48 uint8_t block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
49 /* and one more for user-space compatibility */
52 /* This is the structure as used in the I2C_SMBUS ioctl call */
53 struct i2c_smbus_ioctl_data {
57 union i2c_smbus_data *data;
60 int i2c_close(peripheral_i2c_h i2c);
61 int i2c_set_address(peripheral_i2c_h i2c, int address);
62 int i2c_read(peripheral_i2c_h i2c, unsigned char *data, int length);
63 int i2c_write(peripheral_i2c_h i2c, const unsigned char *data, int length);
64 int i2c_smbus_ioctl(peripheral_i2c_h i2c, struct i2c_smbus_ioctl_data *data);