zc030x_i2c.h

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#ifndef h_Zc030x_I2C_h
#define h_Zc030x_I2C_h

/* This file implement the I2C communication functionnalities */
/* This project is under GPL                                  */
/* - Driver file -            Zc030x       - Driver file -    */ 
/* Copyright: 
               Andrew   Birkett
               Cyril    Russo

--------------------------------------------------------------*/

/* Include definitions */
#include "zc030x_kerneldef.h"
#include "zc030x.h"

/* Declare I2C structures */
#define I2C_InitSequenceSize    6
typedef struct
{
    /* Transfer dir (1: Dev->host 0: host->Dev) */
    __u16 Direction[I2C_InitSequenceSize];
    /* Address of the register to access */
    __u16 Address[I2C_InitSequenceSize];   
    /* Value to read/write */
    __u16 Value[I2C_InitSequenceSize];
    /* Expected return size */
    __u16 ReturnSize[I2C_InitSequenceSize];
    /* Expected return value */
    __u16 ReturnValue[I2C_InitSequenceSize];
    
} I2CInitSequence;

/* Declare I2C config */
#define I2C_ConfigSize  255
typedef struct 
{
    /* I2C addresses */
    __u8    Addresses[I2C_ConfigSize];
    /* I2C values */
    __u8    Values[I2C_ConfigSize];
    /* Length of this config */
    __u16   Length;
} SensorConfig;

/* Define error codes */
#define I2C_Error       -1
#define I2C_Warning     0
#define I2C_OK          1   


/* Declare I2C functions */
/* Init I2C register access */
int zc030x_i2c_init(struct usb_device *udev, const I2CInitSequence * pSequence);

/* Try to read an I2C register */
int zc030x_i2c_reg_read(struct usb_device *udev, __u16 addr, __u16 size);

/* Try to write an I2C register */
int zc030x_i2c_reg_write(struct usb_device *udev, __u16 addr, __u16 value);

/* Try to detect where the I2C sensor is */
int zc030x_i2c_detect(struct usb_device *udev, const I2CInitSequence * pSequence);

/* Check a sensor signature */
int zc030x_i2c_checksignature(struct usb_device *udev, const signature * pSignature);

/* Get a simple register map */
int zc030x_i2c_simple_registermap(struct usb_device *udev);
    
/* Init I2C register access */
int zc030x_i2c_start(struct usb_device *udev, const I2CInitSequence * pSequence, const __u8 addr);

/* Write an I2C config */
int zc030x_i2c_writeconfig(struct usb_device *udev, const SensorConfig * pConfig);


#endif