diff -r a232af6b0b1f -r a5496987b1da kernel/eka/drivers/usbho/usbdi_utils/usbtransfers.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/drivers/usbho/usbdi_utils/usbtransfers.cpp	Thu Jul 01 17:57:33 2010 +0100
@@ -0,0 +1,205 @@
+// 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:
+//
+
+#include <d32usbtransfers.h>
+
+#include <d32usbdi_errors.h>
+#include "usbtransferstrategy.h"
+#include "usbdiutils.h"
+
+
+// ========================
+// RUsbTransferDescriptor
+// ========================
+
+/**
+Constructor protected to as this class is only intended as a base class.
+*/
+RUsbTransferDescriptor::RUsbTransferDescriptor(TTransferType aType, TInt aMaxSize, TInt aMaxNumPackets)
+	: iHandle(KInvalidHandle)
+	, iType(aType)
+	, iMaxSize(aMaxSize)
+	, iMaxNumPackets(aMaxNumPackets)
+	{
+	}
+
+/**
+Releases resources allocated to this transfer descriptor.
+*/
+EXPORT_C void RUsbTransferDescriptor::Close()
+	{
+	// Do nothing - the buffer is owned by the {R,D}UsbInterface.
+	// This is provided in case the descriptor owns resources in future.
+	}
+
+
+// ============================
+// RUsbIsocTransferDescriptor
+// ============================
+
+EXPORT_C RUsbIsocTransferDescriptor::RUsbIsocTransferDescriptor(TInt aMaxSize, TInt aMaxNumPackets)
+	: RUsbTransferDescriptor(EIsochronous, aMaxSize, aMaxNumPackets)
+	, iWriteHandle(KInvalidHandle)
+	{
+	}
+
+EXPORT_C void RUsbIsocTransferDescriptor::Reset()
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorHandle));
+	iWriteHandle = iHandle;
+	iTransferStrategy->IsocReset(iHandle);
+	}
+
+EXPORT_C TPacketLengths RUsbIsocTransferDescriptor::Lengths()
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorHandle));
+	return iTransferStrategy->IsocLengths(iHandle);
+	}
+	
+EXPORT_C TPacketResults RUsbIsocTransferDescriptor::Results()
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorHandle));
+	return iTransferStrategy->IsocResults(iHandle);
+	}
+	
+EXPORT_C TInt RUsbIsocTransferDescriptor::MaxPacketSize()
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorHandle));
+	return iTransferStrategy->IsocMaxPacketSize(iHandle);
+	}
+
+EXPORT_C TPtr8 RUsbIsocTransferDescriptor::WritablePackets(TInt aNumPacketsRequested, TInt& aMaxNumOfPacketsAbleToWrite)
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorHandle));
+	if(iWriteHandle == KInvalidHandle)
+		{
+		return TPtr8(NULL, 0);
+		}
+	return iTransferStrategy->IsocWritablePackets(iHandle, iWriteHandle, aNumPacketsRequested, aMaxNumOfPacketsAbleToWrite);
+	}
+
+EXPORT_C void RUsbIsocTransferDescriptor::SaveMultiple(TInt aNumOfPackets)
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorHandle));
+	__ASSERT_ALWAYS(iWriteHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorWriteHandle));
+	TInt writeHandle = iTransferStrategy->IsocSaveMultiple(iHandle, iWriteHandle, aNumOfPackets);
+	iWriteHandle = (writeHandle < 0) ? KInvalidHandle : writeHandle;
+	}
+
+EXPORT_C TPtrC8 RUsbIsocTransferDescriptor::Packets(TInt aFirstPacketIndex, TInt aNumPacketsRequested, TInt& aNumOfPacketsReturned) const
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorHandle));
+	return iTransferStrategy->IsocPackets(iHandle, aFirstPacketIndex, aNumPacketsRequested, aNumOfPacketsReturned);
+	}
+
+EXPORT_C void RUsbIsocTransferDescriptor::ReceivePackets(TInt aNumOfPackets)
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIsocTransferDescriptorHandle));
+	iTransferStrategy->IsocReceivePackets(iHandle, aNumOfPackets);
+	}
+
+
+// ============================
+// RUsbBulkTransferDescriptor
+// ============================
+
+EXPORT_C RUsbBulkTransferDescriptor::RUsbBulkTransferDescriptor(TInt aMaxSize)
+	: RUsbTransferDescriptor(EBulk, aMaxSize, 0)
+	{
+	}
+
+/**
+@return A modifiable pointer to the entire data buffer.
+*/
+EXPORT_C TPtr8 RUsbBulkTransferDescriptor::WritableBuffer()
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadBulkTransferDescriptorHandle));
+	return iTransferStrategy->BulkWritableBuffer(iHandle);
+	}
+
+/**
+Update the transfer descriptor given the length of data supplied.
+@param[in] aLength Length of data to write or expect.
+*/
+EXPORT_C void RUsbBulkTransferDescriptor::SaveData(TInt aLength)
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadBulkTransferDescriptorHandle));
+	iTransferStrategy->BulkSaveData(iHandle, aLength);
+	}
+
+/**
+@return A non-modifiable pointer to the entire data buffer.
+*/
+EXPORT_C TPtrC8 RUsbBulkTransferDescriptor::Buffer() const
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadBulkTransferDescriptorHandle));
+	return iTransferStrategy->BulkBuffer(iHandle);
+	}
+	
+/**
+@param aZlpStatus the ZLP type to use for the transfer
+*/
+EXPORT_C void RUsbBulkTransferDescriptor::SetZlpStatus(TZlpStatus aZlpStatus)
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadBulkTransferDescriptorHandle));
+	iTransferStrategy->BulkSetZlpStatus(iHandle, aZlpStatus);
+	}
+
+
+// ============================
+// RUsbIntrTransferDescriptor
+// ============================
+
+EXPORT_C RUsbIntrTransferDescriptor::RUsbIntrTransferDescriptor(TInt aMaxSize)
+	: RUsbTransferDescriptor(EInterrupt, aMaxSize, 0)
+	{
+	}
+
+/**
+@return A modifiable pointer to the entire data buffer.
+*/
+EXPORT_C TPtr8 RUsbIntrTransferDescriptor::WritableBuffer()
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIntrTransferDescriptorHandle));
+	return iTransferStrategy->IntrWritableBuffer(iHandle);
+	}
+
+/**
+Update the transfer descriptor given the length of data supplied.
+@param[in] aLength Length of data to write or expect.
+*/
+EXPORT_C void RUsbIntrTransferDescriptor::SaveData(TInt aLength)
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIntrTransferDescriptorHandle));
+	iTransferStrategy->IntrSaveData(iHandle, aLength);
+	}
+
+/**
+@return A non-modifiable pointer to the entire data buffer.
+*/
+EXPORT_C TPtrC8 RUsbIntrTransferDescriptor::Buffer() const
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIntrTransferDescriptorHandle));
+	return iTransferStrategy->IntrBuffer(iHandle);
+	}
+	
+/**
+@param aZlpStatus the ZLP type to use for the transfer
+*/
+EXPORT_C void RUsbIntrTransferDescriptor::SetZlpStatus(TZlpStatus aZlpStatus)
+	{
+	__ASSERT_ALWAYS(iHandle != KInvalidHandle, UsbdiUtils::Panic(UsbdiPanics::EBadIntrTransferDescriptorHandle));
+	return iTransferStrategy->IntrSetZlpStatus(iHandle, aZlpStatus);
+	}