diff -r 2f92ad2dc5db -r 1df514389a47 kernel/eka/drivers/usbho/usbdi_utils/usbtransferstrategy.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/drivers/usbho/usbdi_utils/usbtransferstrategy.h	Wed Apr 14 17:22:59 2010 +0300
@@ -0,0 +1,64 @@
+// Copyright (c) 2007-2009 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:
+//
+
+/**
+ @file
+ @internalComponent
+*/
+
+#ifndef USBTRANSFERSTRATEGY_H
+#define USBTRANSFERSTRATEGY_H
+
+#include <e32std.h>
+#include <d32usbtransfers.h>
+
+
+NONSHARABLE_CLASS(RUsbTransferStrategy)
+	{
+public:
+	virtual void Close();
+
+	virtual TInt RegisterTransferDescriptor(RUsbTransferDescriptor& aTransferDesc, TInt aRequiredSize, TUint aStartAlignment, TInt aRequiredMaxPackets) =0;
+	virtual void ResetTransferDescriptors() =0;
+	virtual TInt InitialiseTransferDescriptors(RUsbInterface& aInterface) =0;
+
+public: // Interrupt transfer descriptor methods
+	virtual TPtr8	IntrWritableBuffer(TInt aHandle) =0;
+	virtual void	IntrSaveData(TInt aHandle, TInt aLength) =0;
+	virtual void	IntrSetZlpStatus(TInt aHandle, RUsbTransferDescriptor::TZlpStatus aZlpStatus) =0;
+	virtual TPtrC8	IntrBuffer(TInt aHandle) const =0;
+
+public: // Bulk transfer descriptor methods
+	virtual TPtr8	BulkWritableBuffer(TInt aHandle) =0;
+	virtual void	BulkSaveData(TInt aHandle, TInt aLength) =0;
+	virtual void	BulkSetZlpStatus(TInt aHandle, RUsbTransferDescriptor::TZlpStatus aZlpStatus) =0;
+	virtual TPtrC8	BulkBuffer(TInt aHandle) const =0;
+
+public: // Isochronous transfer descriptor methods
+	virtual void	IsocReset(TInt aHandle) =0;
+	virtual TPacketLengths IsocLengths(TInt aHandle) =0;
+	virtual TPacketResults IsocResults(TInt aHandle) =0;
+	virtual TInt	IsocMaxPacketSize(TInt aHandle) =0;
+	virtual TPtr8	IsocWritablePackets(TInt aHandle, TInt aWriteHandle, TInt aNumPacketsRequested, TInt& aMaxNumPacketsAbleToWrite) =0;
+	virtual TInt	IsocSaveMultiple(TInt aHandle, TInt aWriteHandle, TInt aNumOfPackets) =0;
+	virtual TPtrC8	IsocPackets(TInt aHandle, TInt aFirstPacketIndex, TInt aNumPacketsRequested, TInt& aNumPacketsReturned) const =0;
+	virtual void	IsocReceivePackets(TInt aHandle, TInt aNumOfPackets) =0;
+
+protected:
+	void SetTransferHandle(RUsbTransferDescriptor& aTransfer, TInt aHandle) const;
+	};
+
+
+#endif // USBTRANSFERSTRATEGY_H