/*

* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

* Class declaration for CBulkOnlyTransportUsbcLdd.

*

*/

/** 

 @file

 @internalTechnology

*/

#ifndef __CBULKONLYTRANSPORTUSBCLDD_H__

#define __CBULKONLYTRANSPORTUSBCLDD_H__

#include "cbulkonlytransport.h"

#include "cactivedevicestatenotifierbase.h"

// Maximum size for SCSI Read10 Write10 and Verify10 commands

// Windows requests size of 64K whereas MAC requests size of 128K

static const TUint32 KMaxBufSize = 128 * 1024;

//Forward Declaration

class CBulkOnlyTransportUsbcLdd;

/**

Represent session with control endpoint (Ep0).

handles the control interface, and responds to the class specific commands (RESET and GET_MAX_LUN).  

*/

class CControlInterfaceUsbcLdd : public CActive

	{

public:

	enum TControlState

		{

		ENone,

		EReadEp0Data,

		ESendMaxLun

		};

public:

	static CControlInterfaceUsbcLdd* NewL(CBulkOnlyTransportUsbcLdd& aParent);

	~CControlInterfaceUsbcLdd();

	TInt Start();

	void Stop();

	virtual void RunL();

	virtual void DoCancel();

private:

	CControlInterfaceUsbcLdd(CBulkOnlyTransportUsbcLdd& aParent);

	void ConstructL();

	TInt ReadEp0Data();

	void DecodeEp0Data();

	TInt ReadUsbEp0();

private:

	/** Buffer for request data*/

	TBuf8<KRequestHdrSize> iData;

	TUsbRequestHdr iRequestHeader;

	/** reference to the  CBulkOnlyTransport*/

	CBulkOnlyTransportUsbcLdd& iParent;

	/** represent carrent state for state mashine */

	TControlState iCurrentState;

	};

/** Transport Class that accessess the Non-SC LDD */

class CBulkOnlyTransportUsbcLdd : public CBulkOnlyTransport, public MLddDeviceStateNotification

	{

public:

	CBulkOnlyTransportUsbcLdd(TInt aNumDrives,CUsbMassStorageController& aController);

	~CBulkOnlyTransportUsbcLdd();

	void ConstructL();

	RDevUsbcClient& Ldd();

	TInt BytesAvailable(); // from Mtransport base class

	TInt SetupConfigurationDescriptor(TBool aUnset = EFalse);

	TInt SetupInterfaceDescriptors();

	void ReleaseInterface();

	void CancelControlInterface();

	TInt StartControlInterface();

	void ActivateDeviceStateNotifier();

	void CancelDeviceStateNotifier();

	void CancelReadWriteRequests();

	void AllocateEndpointResources();

	TInt GetDeviceStatus(TUsbcDeviceState& deviceStatus);

	void FlushData();

	void ReadAndDiscardData(TInt aBytes);

	void ReadCBW();

	void ExpireData(TAny* aAddress = NULL);

	void ProcessCbwEvent();

	void StallEndpointAndWaitForClear();

	void ReadData(TUint aLength = 0);

	void WriteUsb(TRequestStatus& aStatus, TPtrC8& aDes, TUint aLength, TBool aZlpRequired = EFalse);

	void SetCbwPtr();

	TPtr8& SetCommandBufPtr(TUint aLength);

	TPtr8& SetDataBufPtr();

	void SetPaddingBufPtr(TUint aLength);

	void SetCswBufPtr(TUint aLength);

	void ProcessReadingDataEvent();

	void DiscardData(TUint aLength);

	void WriteToClient(TUint aLength);

	void SetReadDataBufPtr(TUint aLength);

#ifdef MSDC_MULTITHREADED

	virtual void GetBufferPointers(TPtr8& aDes1, TPtr8& aDes2);

#endif

    void Activate(TRequestStatus& aStatus, TUint& aValue);

    void Cancel();

private:

	TInt ReadUsb(TUint aLength = 0);

private:

	RDevUsbcClient iLdd;

	CControlInterfaceUsbcLdd* iControlInterface;

	CActiveDeviceStateNotifierBase* iDeviceStateNotifier;

	/** buffer for Command Block Wrapper */

	TBuf8 <KCbwLength> iCbwBuf;

	TBuf8<KCommandBufferLength> iCommandBuf; // For Responses to commands 

	TBuf8<KMaxBufSize> iDataBuf1;	// For data transfers (Reading and Writing)

	TBuf8<KMaxBufSize> iDataBuf2;

	TBool iSwap;

	/** internal buffer for CSW */

	TBuf8<KCswLength> iCswBuf;

	/** internal buffer for padding */

	TBuf8<KBOTMaxBufSize> iBuf;

	/** internal buffer for garbage */

	TBuf8<512> iDiscardBuf;

	};

#endif