/***************************************************************************\
*
*                        ************************
*                        * MINIPORT SAMPLE CODE *
*                        ************************
*
* Module Name:
* 
*   i2c.h
* 
* Abstract:
* 
*   This module contains the code that implements the i2c interface feature
* 
*
* Environment:
*
*   Kernel mode
*
*
* Copyright (c) 1994-1999 3Dlabs Inc. Ltd. All rights reserved.            
* Copyright (c) 1995-2003 Microsoft Corporation.  All Rights Reserved.
*
\***************************************************************************/

#define STATUS_SUCCESS                   0x00000000
#define STATUS_UNSUCCESSFUL              0xC0000001

#define MAX_CLOCK_RATE 1000000

#define INITGUID
typedef ULONG NTSTATUS;

#include <i2cgpio.h>

BOOLEAN
GetCookie(
    PVOID DeviceObject,
    PULONG Cookie
    );

VP_STATUS
I2CBusOpenCRT(
    PVOID DeviceObject,
    BOOLEAN bOpen,
    PI2CControl I2CControl
    );

VP_STATUS
I2CBusOpenDFP(
    PVOID DeviceObject,
    BOOLEAN bOpen,
    PI2CControl I2CControl
    );

VP_STATUS
I2CBusAccessCRT(
    PVOID DeviceObject,
    PI2CControl I2CControl
    );

VP_STATUS
I2CBusAccessDFP(
    PVOID DeviceObject,
    PI2CControl I2CControl
    );

VOID
InterfaceReference(
    IN PVOID pContext
    );

VOID
InterfaceDereference(
    IN PVOID pContext
    );

ULONG
I2CNull(
    PI2CControl I2CControl,
    PVIDEO_I2C_CONTROL I2CCallbacks,
    PHW_DEVICE_EXTENSION hwDeviceExtension
    );

ULONG
I2CRead(
    PI2CControl I2CControl,
    PVIDEO_I2C_CONTROL I2CCallbacks,
    PHW_DEVICE_EXTENSION hwDeviceExtension
    );

ULONG
I2CWrite(
    PI2CControl I2CControl,
    PVIDEO_I2C_CONTROL I2CCallbacks,
    PHW_DEVICE_EXTENSION hwDeviceExtension
    );

ULONG
I2CStop(
    PI2CControl I2CControl,
    PVIDEO_I2C_CONTROL I2CCallbacks,
    PHW_DEVICE_EXTENSION hwDeviceExtension
    );

ULONG
I2CStart(
    PI2CControl I2CControl,
    PVIDEO_I2C_CONTROL I2CCallbacks,
    PHW_DEVICE_EXTENSION hwDeviceExtension
    );

VP_STATUS
I2CBusOpen(
    PVOID DeviceObject,
    BOOLEAN bOpen,
    PI2CControl I2CControl,
    PVIDEO_I2C_CONTROL I2CCallbacks
    );

VP_STATUS
I2CBusAccess(
    PVOID DeviceObject,
    PI2CControl I2CControl,
    PVIDEO_I2C_CONTROL I2CCallbacks
    );