1/*******************************************************************
2*
3*         Copyright (c) 2007 by Silicon Motion, Inc. (SMI)
4*
5*  All rights are reserved. Reproduction or in part is prohibited
6*  without the written consent of the copyright owner.
7*
8*  swi2c.h --- SM750/SM718 DDK
9*  This file contains the definitions for i2c using software
10*  implementation.
11*
12*******************************************************************/
13#ifndef _SWI2C_H_
14#define _SWI2C_H_
15
16/* Default i2c CLK and Data GPIO. These are the default i2c pins */
17#define DEFAULT_I2C_SCL                     30
18#define DEFAULT_I2C_SDA                     31
19
20/*
21 * This function initializes the i2c attributes and bus
22 *
23 * Parameters:
24 *      i2cClkGPIO  - The GPIO pin to be used as i2c SCL
25 *      i2cDataGPIO - The GPIO pin to be used as i2c SDA
26 *
27 * Return Value:
28 *      -1   - Fail to initialize the i2c
29 *       0   - Success
30 */
31long sm750_sw_i2c_init(
32	unsigned char clk_gpio,
33	unsigned char data_gpio
34);
35
36/*
37 *  This function reads the slave device's register
38 *
39 *  Parameters:
40 *      addr   - i2c Slave device address which register
41 *                        to be read from
42 *      reg    - Slave device's register to be read
43 *
44 *  Return Value:
45 *      Register value
46 */
47unsigned char sm750_sw_i2c_read_reg(
48	unsigned char addr,
49	unsigned char reg
50);
51
52/*
53 *  This function writes a value to the slave device's register
54 *
55 *  Parameters:
56 *      addr            - i2c Slave device address which register
57 *                        to be written
58 *      reg             - Slave device's register to be written
59 *      data            - Data to be written to the register
60 *
61 *  Result:
62 *          0   - Success
63 *         -1   - Fail
64 */
65long sm750_sw_i2c_write_reg(
66	unsigned char addr,
67	unsigned char reg,
68	unsigned char data
69);
70
71#endif  /* _SWI2C_H_ */
72