driveri2c.h

完整的基于Conxant平台的USB电视棒的WIN驱动程序。

/*+++ *******************************************************************\ 
* 
*  Copyright and Disclaimer: 
*  
*     --------------------------------------------------------------- 
*     This software is provided "AS IS" without warranty of any kind, 
*     either expressed or implied, including but not limited to the 
*     implied warranties of noninfringement, merchantability and/or 
*     fitness for a particular purpose.
*     --------------------------------------------------------------- 
*   
*     Copyright (c) 2008 Conexant Systems, Inc. 
*     All rights reserved. 
*
\******************************************************************* ---*/ 
#ifndef _DRIVER_I2C_H_
#define _DRIVER_I2C_H_

extern "C" 
{
    #include <wdm.h>
}

#include <windef.h>

#include "i2cIF.h"
#include "UsbI2cInterface.h"

#define TRANSFER_SIZE_A0 16
#define TRANSFER_SIZE_T0 4


class DriverI2C : public I2cIF
{
public:
    DriverI2C(UsbI2cInterface* p_usb_i2c_interface, BYTE channel);
    ~DriverI2C();
    virtual NTSTATUS setCommandFormat(BOOLEAN first,BOOLEAN last);

    // Increments the reference count for the calling interface on an 
    // object. QueryInferface calls addRef on the returned interface 
    // pointer on behalf of the caller.
    virtual INT       addRef();
    // Decrements the reference count for the calling interface 
    // on a object. If the reference count on the object falls 
    // to 0, the object is freed from memory.
    virtual INT       release();

    virtual BOOLEAN read( 
        BYTE   device_adr, 
        INT    size, 
        BYTE  *p_buf)
    {
        return TRUE;
    }

    virtual BOOLEAN write( 
        BYTE   device_adr, 
        INT    size, 
        BYTE  *p_buf)
    {
        return TRUE;
    }

    virtual BOOLEAN writeThenRead( 
        BYTE        device_adr, 
        INT         write_size, 
        const BYTE *p_write_buf,
        INT         read_size,
        BYTE       *p_read_buf)
    {
        return TRUE;
    }

    // the next 2 I2c interface added for Polaris
    // because Polaris only support single read & write
    virtual BOOLEAN read( 
        BYTE        device_adr, 
        INT         subaddr_size, 
        const BYTE  *p_subaddr_buf,
        INT         read_size,
        BYTE        *p_read_buf);

    virtual BOOLEAN write( 
        BYTE        device_adr, 
        INT         subaddr_size,
        const BYTE  *p_subaddr_buf,
        INT         write_size,
        BYTE        *p_write_buf);
 
    DWORD maxTransferSize();

protected:
private:
    

private:

    UsbI2cInterface*    _p_usb_i2c_interface;
    BYTE                _channel;
    DWORD               _max_transfer_size;

};


#endif