1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/staging/sm750fb/ddk750_swi2c.h b/drivers/staging/sm750fb/ddk750_swi2c.h
new file mode 100644
index 000000000000..ec5463b98ddf
--- /dev/null
+++ b/drivers/staging/sm750fb/ddk750_swi2c.h
@@ -0,0 +1,92 @@
+/*******************************************************************
+*
+*         Copyright (c) 2007 by Silicon Motion, Inc. (SMI)
+*
+*  All rights are reserved. Reproduction or in part is prohibited
+*  without the written consent of the copyright owner.
+*
+*  swi2c.h --- SM750/SM718 DDK
+*  This file contains the definitions for i2c using software
+*  implementation.
+*
+*******************************************************************/
+#ifndef _SWI2C_H_
+#define _SWI2C_H_
+
+/* Default i2c CLK and Data GPIO. These are the default i2c pins */
+#define DEFAULT_I2C_SCL                     30
+#define DEFAULT_I2C_SDA                     31
+
+/*
+ * This function initializes the i2c attributes and bus
+ *
+ * Parameters:
+ *      i2cClkGPIO  - The GPIO pin to be used as i2c SCL
+ *      i2cDataGPIO - The GPIO pin to be used as i2c SDA
+ *
+ * Return Value:
+ *      -1   - Fail to initialize the i2c
+ *       0   - Success
+ */
+long swI2CInit(
+    unsigned char i2cClkGPIO,
+    unsigned char i2cDataGPIO
+);
+
+/*
+ *  This function reads the slave device's register
+ *
+ *  Parameters:
+ *      deviceAddress   - i2c Slave device address which register
+ *                        to be read from
+ *      registerIndex   - Slave device's register to be read
+ *
+ *  Return Value:
+ *      Register value
+ */
+unsigned char swI2CReadReg(
+    unsigned char deviceAddress,
+    unsigned char registerIndex
+);
+
+/*
+ *  This function writes a value to the slave device's register
+ *
+ *  Parameters:
+ *      deviceAddress   - i2c Slave device address which register
+ *                        to be written
+ *      registerIndex   - Slave device's register to be written
+ *      data            - Data to be written to the register
+ *
+ *  Result:
+ *          0   - Success
+ *         -1   - Fail
+ */
+long swI2CWriteReg(
+    unsigned char deviceAddress,
+    unsigned char registerIndex,
+    unsigned char data
+);
+
+/*
+ *  These two functions are used to toggle the data on the SCL and SDA I2C lines.
+ *  The used of these two functions are not recommended unless it is necessary.
+ */
+
+/*
+ *  This function set/reset the SCL GPIO pin
+ *
+ *  Parameters:
+ *      value	- Bit value to set to the SCL or SDA (0 = low, 1 = high)
+ */
+void swI2CSCL(unsigned char value);
+
+/*
+ *  This function set/reset the SDA GPIO pin
+ *
+ *  Parameters:
+ *      value	- Bit value to set to the SCL or SDA (0 = low, 1 = high)
+ */
+void swI2CSDA(unsigned char value);
+
+#endif  /* _SWI2C_H_ */