projects / deliverable / linux.git / blame
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|---|---|---|
| 81dee67e SM |
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 | */ | |
| f2ea7733 | 31 | long sm750_sw_i2c_init( |
| fe820044 MR |
32 | unsigned char clk_gpio, |
| 33 | unsigned char data_gpio | |
| 81dee67e SM |
34 | ); |
| 35 | ||
| 36 | /* | |
| 37 | * This function reads the slave device's register | |
| 38 | * | |
| 39 | * Parameters: | |
| fe820044 | 40 | * addr - i2c Slave device address which register |
| 81dee67e | 41 | * to be read from |
| fe820044 | 42 | * reg - Slave device's register to be read |
| 81dee67e SM |
43 | * |
| 44 | * Return Value: | |
| 45 | * Register value | |
| 46 | */ | |
| 288836b6 | 47 | unsigned char sm750_sw_i2c_read_reg( |
| fe820044 MR |
48 | unsigned char addr, |
| 49 | unsigned char reg | |
| 81dee67e SM |
50 | ); |
| 51 | ||
| 52 | /* | |
| 53 | * This function writes a value to the slave device's register | |
| 54 | * | |
| 55 | * Parameters: | |
| fe820044 | 56 | * addr - i2c Slave device address which register |
| 81dee67e | 57 | * to be written |
| fe820044 | 58 | * reg - Slave device's register to be written |
| 81dee67e SM |
59 | * data - Data to be written to the register |
| 60 | * | |
| 61 | * Result: | |
| 62 | * 0 - Success | |
| 63 | * -1 - Fail | |
| 64 | */ | |
| d33b4204 | 65 | long sm750_sw_i2c_write_reg( |
| fe820044 MR |
66 | unsigned char addr, |
| 67 | unsigned char reg, | |
| bf36fa2f | 68 | unsigned char data |
| 81dee67e SM |
69 | ); |
| 70 | ||
| 81dee67e | 71 | #endif /* _SWI2C_H_ */ |