/*

* 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:

*

*/

/**

 @file

 @internalTechnology

*/

#include "cbulkonlytransport.h"

#include "cbulkonlytransportusbcscldd.h"

#include "usbmsshared.h"

#include "massstoragedebug.h"

#include "cusbmassstorageserver.h"

//This value defined in USB Mass Storage Bulk Only Transrt spec and not supposed to be changed

LOCAL_D const TInt KRequiredNumberOfEndpoints = 2; // in addition to endpoint 0.

LOCAL_D const TInt KUsbNumInterfacesOffset = 4;

#ifdef MSDC_MULTITHREADED

//Only used in DB. The first 2K of KMaxScBufferSize for sending CSW 

static const TUint32 KCswBufferSize = 2 * 1024;

#endif

////////////////////////////////////

/**

Called by CBulkOnlyTransportUsbcScLdd to create an instance of CControlInterfaceUsbcScLdd

@param aParent reference to the CBulkOnlyTransportUsbcScLdd

*/

CControlInterfaceUsbcScLdd* CControlInterfaceUsbcScLdd::NewL(CBulkOnlyTransportUsbcScLdd& aParent)

	{

	CControlInterfaceUsbcScLdd* self = new(ELeave) CControlInterfaceUsbcScLdd(aParent);

	CleanupStack::PushL(self);

	self->ConstructL();

	CActiveScheduler::Add(self);

	CleanupStack::Pop();

	return self;

	}

void CControlInterfaceUsbcScLdd::ConstructL()

	{

	}

/**

c'tor

@param aParent reference to the CBulkOnlyTransportUsbcScLdd

*/

CControlInterfaceUsbcScLdd::CControlInterfaceUsbcScLdd(CBulkOnlyTransportUsbcScLdd& aParent)

	:CActive(EPriorityStandard),

	 iParent(aParent),

	 iCurrentState(ENone)

	{

	}

/**

d'tor

*/

CControlInterfaceUsbcScLdd::~CControlInterfaceUsbcScLdd()

	{

	__FNLOG("CControlInterfaceUsbcScLdd::~CControlInterfaceUsbcScLdd ");

	Cancel();

	iEp0Buf.Close();

	}

TInt CControlInterfaceUsbcScLdd::OpenEp0()

	{

	TInt res = iParent.Ldd().OpenEndpoint(iEp0Buf,0);

	return res;

	}

/**

Called by CBulkOnlyTransport HwStart to start control interface

*/

TInt CControlInterfaceUsbcScLdd::Start()

	{

	__FNLOG("CControlInterfaceUsbcScLdd::Start ");

	TInt res = ReadEp0Data();

	return (res);

	}

/**

Called by desctructor of CBulkOnlyTransportUsbcScLdd to stop control interface

*/

void CControlInterfaceUsbcScLdd::Stop()

	{

	__FNLOG("CControlInterfaceUsbcScLdd::Stop ");

	if (!IsActive())

		{

		__PRINT(_L("Not active\n"));

		return;

		}

	__PRINT(_L("\nStopping...\n"));

	iCurrentState = ENone;

	Cancel();

	}

/**

Cancel outstanding request (if any)

*/

void CControlInterfaceUsbcScLdd::DoCancel()

	{

	__FNLOG("CControlInterfaceUsbcScLdd::DoCancel ");

	switch(iCurrentState)

		{

		case EReadEp0Data:

			iParent.Ldd().ReadCancel(KUsbcScEndpointZero);

			break;

		case ESendMaxLun:

			iParent.Ldd().WriteCancel(KUsbcScEndpointZero);

			break;

		default:

			__PRINT(_L("\nWrong state !\n"));

			__ASSERT_DEBUG(EFalse, User::Panic(KUsbMsSvrPncCat, EMsControlInterfaceBadState));

		}

	}

/**

Implement CControlInterfaceUsbcScLdd state machine

*/

void CControlInterfaceUsbcScLdd::RunL()

	{

	__FNLOG("CControlInterfaceUsbcScLdd::RunL ");

	if (iStatus != KErrNone)

		{

		__PRINT1(_L("Error %d in RunL\n"), iStatus.Int());

		//read EP0  again

		ReadEp0Data();

		return;

		}

	ReadEp0Data();

	}

/**

Actual Read to RDevUsbcScClient BIL

*/

TInt CControlInterfaceUsbcScLdd::ReadUsbEp0()

	{

	iCurrentState = EReadEp0Data;

	iStatus = KRequestPending;

	return iEp0Buf.GetBuffer (iEp0Packet,iEp0Size,iEp0Zlp,iStatus);

	}

/**

Post a read request to EEndpoint0 to read request header

*/

TInt CControlInterfaceUsbcScLdd::ReadEp0Data()

	{

	__FNLOG("CControlInterfaceUsbcScLdd::ReadEp0Data ");

	if (IsActive())

		{

		__PRINT(_L("Still active\n"));

		return KErrServerBusy;

		}

	TInt r = KErrNone;

	do

		{

		r = ReadUsbEp0();

		if (r == KErrCompletion)

			{

			iStatus = KErrNone;

			DecodeEp0Data();

			}

		else if (r == KErrNone)

			{

			SetActive();

			}

		} while (((r == KErrCompletion) || (r == TEndpointBuffer::KStateChange)) && (!IsActive()));

	return KErrNone;

	}

/**

Decode request header and do appropriate action - get max LUN info or post a reset request

*/

void CControlInterfaceUsbcScLdd::DecodeEp0Data()

	{

	__FNLOG("CControlInterfaceUsbcScLdd::DecodeEp0Data ");

	if (IsActive())

		{

		__PRINT(_L("Still active\n"));

		__ASSERT_DEBUG(EFalse, User::Panic(KUsbMsSvrPncCat, EMsControlInterfaceStillActive));

		return;

		}

	TPtrC8 ep0ReadDataPtr((TUint8*)iEp0Packet, iEp0Size);

	TInt err = iRequestHeader.Decode(ep0ReadDataPtr);

	if(err != KErrNone)

		return;

    switch(iRequestHeader.iRequest)

		{

		//

		// GET MAX LUN (0xFE)

		//

		case TUsbRequestHdr::EReqGetMaxLun:

			{

			__PRINT1(_L("DecodeEp0Data : 'Get Max LUN' Request MaxLun = %d"),iParent.MaxLun() );

            if (   iRequestHeader.iRequestType != 0xA1 //value from USB MS BOT spec

                || iRequestHeader.iIndex > 15

                || iRequestHeader.iValue != 0

                || iRequestHeader.iLength != 1)

                {

    		    __PRINT(_L("GetMaxLun command packet check error"));

                iParent.Ldd().EndpointZeroRequestError();

                break;

                }

			TPtr8* ep0WriteDataPtr = NULL;

			TUint ep0Length;

			iEp0Buf.GetInBufferRange(((TAny*&)ep0WriteDataPtr),ep0Length);

			ep0WriteDataPtr->SetLength(1);	//Return only 1 byte to host

			ep0WriteDataPtr->Fill(0);

			ep0WriteDataPtr->Fill(iParent.MaxLun());	// Supported Units

			TInt length = ep0WriteDataPtr->Length();

			err = iEp0Buf.WriteBuffer((TPtr8*)(ep0WriteDataPtr->Ptr()),length,ETrue,iStatus);

			iCurrentState = ESendMaxLun;

			SetActive();

			return;

			}

		//

		// RESET (0xFF)

		//

		case TUsbRequestHdr::EReqReset:

			{

			__PRINT(_L("DecodeEp0Data : 'Mass Storage Reset' Request"));

            if (   iRequestHeader.iRequestType != 0x21 //value from USB MS BOT spec

                || iRequestHeader.iIndex > 15

                || iRequestHeader.iValue != 0

                || iRequestHeader.iLength != 0)

                {

			    __PRINT(_L("MSC Reset command packet check error"));

                iParent.Ldd().EndpointZeroRequestError();

                break;

                }

			iParent.HwStop();

			iParent.Controller().Reset();

			iParent.HwStart(ETrue);

            err = iParent.Ldd().SendEp0StatusPacket();

			return;

			}

		//

		// Unknown?

		//

		default:

			{

			__PRINT(_L("DecodeEp0Data : Unknown Request"));

			}

		}

		ReadEp0Data();  //try to get another request

	}

//

// --- class CBulkOnlyTransportUsbcScLdd ---------------------------------------------------------

//

CBulkOnlyTransportUsbcScLdd::CBulkOnlyTransportUsbcScLdd(TInt aNumDrives,CUsbMassStorageController& aController)

	:CBulkOnlyTransport(aNumDrives, aController)

	{

	__FNLOG("CBulkOnlyTransportUsbcScLdd::CBulkOnlyTransportUsbcScLdd");

	}

/**

Constructs the CBulkOnlyTransportUsbcScLdd object

*/

void CBulkOnlyTransportUsbcScLdd::ConstructL()

	{

	__FNLOG("CBulkOnlyTransportUsbcScLdd::ConstructL()");

	iControlInterface = CControlInterfaceUsbcScLdd::NewL(*this);

	iDeviceStateNotifier = CActiveDeviceStateNotifierBase::NewL(*this, *this);

	iChunk = new RChunk();

	CActiveScheduler::Add(this);

	}

CBulkOnlyTransportUsbcScLdd::~CBulkOnlyTransportUsbcScLdd()

	{

	__FNLOG("CBulkOnlyTransportUsbcScLdd::~CBulkOnlyTransportUsbcScLdd");

	if (iInterfaceConfigured)

		{

		TInt err = iSCReadEndpointBuf.Close(); 

		err = iSCWriteEndpointBuf.Close();

		delete iControlInterface ;

		delete iDeviceStateNotifier;

		delete iChunk;

		}

	}	

RDevUsbcScClient& CBulkOnlyTransportUsbcScLdd::Ldd()

	{

	return iLdd;

	}

/**

Set or unset configuration descriptor for USB MassStorage Bulk Only transport

@param aUnset indicate whether set or unset descriptor

@return KErrNone if operation was completed successfully, errorcode otherwise

*/

TInt CBulkOnlyTransportUsbcScLdd::SetupConfigurationDescriptor(TBool aUnset)

	{

	__FNLOG("CBulkOnlyTransportUsbcScLdd::SetupConfigurationDescriptor");

	TInt ret(KErrNone);

	if ((ret = iLdd.Open(0)) != KErrNone)

		return ret;

	TInt configDescriptorSize(0);

	iLdd.GetConfigurationDescriptorSize(configDescriptorSize);

	if (static_cast<TUint>(configDescriptorSize) != KUsbDescSize_Config)

		{

		return KErrCorrupt;

		}

	TBuf8<KUsbDescSize_Config> configDescriptor;

	ret = iLdd.GetConfigurationDescriptor(configDescriptor);

	if (ret != KErrNone)

		{

		return ret;

		}

	// I beleive that other fields setted up during LDD initialisation

	if (aUnset)

		{

		--configDescriptor[KUsbNumInterfacesOffset];

		}

	else

		{

		++configDescriptor[KUsbNumInterfacesOffset];

		}

	ret = iLdd.SetConfigurationDescriptor(configDescriptor);

	if (aUnset)

		{

		iLdd.Close();

		}

	return ret;

	}

/**

Set up interface descriptor

@return KErrNone if operation was completed successfully, errorcode otherwise

*/

TInt CBulkOnlyTransportUsbcScLdd::SetupInterfaceDescriptors()

	{

	__FNLOG("CBulkOnlyTransportUsbcScLdd::SetupInterfaceDescriptors");

	// Device caps

	TUsbDeviceCaps d_caps;

	TInt ret = iLdd.DeviceCaps(d_caps);

	if (ret != KErrNone)

		{

		return ret;

		}

	TInt totalEndpoints = d_caps().iTotalEndpoints;

	if (totalEndpoints  < KRequiredNumberOfEndpoints)

		{

		return KErrHardwareNotAvailable;

		}

	// Endpoint caps

	TUsbcEndpointData data[KUsbcMaxEndpoints];

	TPtr8 dataptr(reinterpret_cast<TUint8*>(data), sizeof(data), sizeof(data));

	ret = iLdd.EndpointCaps(dataptr);

	if (ret != KErrNone)

		{

		return ret;

		}

	// Set the active interface

	TUsbcScInterfaceInfoBuf ifc;

	TInt ep_found = 0;

	TBool foundBulkIN = EFalse;

	TBool foundBulkOUT = EFalse;

	for (TInt i = 0; i < totalEndpoints ; i++)

		{

		const TUsbcEndpointCaps* caps = &data[i].iCaps;

		const TInt maxPacketSize = caps->MaxPacketSize();

		if (!foundBulkIN &&

			(caps->iTypesAndDir & (KUsbEpTypeBulk | KUsbEpDirIn)) == (KUsbEpTypeBulk | KUsbEpDirIn))

			{

			// InEndpoint is going to be our TX (IN, write) endpoint

			ifc().iEndpointData[0].iType = KUsbEpTypeBulk;

			if((d_caps().iFeatureWord1 & KUsbDevCapsFeatureWord1_EndpointResourceAllocV2) == KUsbDevCapsFeatureWord1_EndpointResourceAllocV2)

				ifc().iEndpointData[0].iFeatureWord1  = KUsbcEndpointInfoFeatureWord1_DMA|KUsbcEndpointInfoFeatureWord1_DoubleBuffering;

			ifc().iEndpointData[0].iDir  = KUsbEpDirIn;

			ifc().iEndpointData[0].iSize = maxPacketSize;

			ifc().iEndpointData[0].iInterval_Hs = 0;

			ifc().iEndpointData[0].iBufferSize = KMaxScBufferSize;

			foundBulkIN = ETrue;

			if (++ep_found == KRequiredNumberOfEndpoints)

				{

				break;

				}

			continue;

			}

		if (!foundBulkOUT &&

			(caps->iTypesAndDir & (KUsbEpTypeBulk | KUsbEpDirOut)) == (KUsbEpTypeBulk | KUsbEpDirOut))

			{

			// OutEndpoint is going to be our RX (OUT, read) endpoint

			ifc().iEndpointData[1].iType = KUsbEpTypeBulk;

			if((d_caps().iFeatureWord1 & KUsbDevCapsFeatureWord1_EndpointResourceAllocV2) == KUsbDevCapsFeatureWord1_EndpointResourceAllocV2)

				ifc().iEndpointData[1].iFeatureWord1  = KUsbcEndpointInfoFeatureWord1_DMA|KUsbcEndpointInfoFeatureWord1_DoubleBuffering;

			ifc().iEndpointData[1].iDir  = KUsbEpDirOut;

			ifc().iEndpointData[1].iSize = maxPacketSize;

			ifc().iEndpointData[1].iInterval_Hs = 0;

			ifc().iEndpointData[1].iBufferSize = KMaxScBufferSize;

			ifc().iEndpointData[1].iReadSize = KMaxScReadSize;

			foundBulkOUT = ETrue;

			if (++ep_found == KRequiredNumberOfEndpoints)

				{

				break;

				}

			continue;

			}

		}

	if (ep_found != KRequiredNumberOfEndpoints)

		{

		return KErrHardwareNotAvailable;

		}

	_LIT16(string, "USB Mass Storage Interface");

	ifc().iString = const_cast<TDesC16*>(&string);

	ifc().iTotalEndpointsUsed = KRequiredNumberOfEndpoints;

	ifc().iClass.iClassNum    = 0x08;	// Mass Storage

	ifc().iClass.iSubClassNum = 0x06;	// SCSI Transparent Command Set

	ifc().iClass.iProtocolNum = 0x50;	// Bulk Only Transport

	if (d_caps().iHighSpeed)

		{

		// Tell the Protocol about it, because it might want to do some

		// optimizing too.

		iProtocol->ReportHighSpeedDevice();

		}

	if ((ret = iLdd.SetInterface(0, ifc)) == KErrNone)

		{

		return (iLdd.FinalizeInterface(iChunk));

		}

	return ret;

	}

void CBulkOnlyTransportUsbcScLdd::ReleaseInterface()

	{

	iLdd.ReleaseInterface(0);

	}

TInt CBulkOnlyTransportUsbcScLdd::StartControlInterface()

	{

	return iControlInterface->Start();

	}

void CBulkOnlyTransportUsbcScLdd::CancelControlInterface()

	{

	iControlInterface->Cancel();

	}

void CBulkOnlyTransportUsbcScLdd::ActivateDeviceStateNotifier()

	{

	iDeviceStateNotifier->Activate();

	}

void CBulkOnlyTransportUsbcScLdd::CancelDeviceStateNotifier()

	{

	iDeviceStateNotifier->Cancel();

	}

void CBulkOnlyTransportUsbcScLdd::CancelReadWriteRequests()

	{

	__FNLOG("CBulkOnlyTransportUsbcScLdd::CancelReadWriteRequests");

	TUsbcScChunkHeader chunkHeader(*iChunk);

	for (TInt i = 0; i < chunkHeader.iAltSettings->iNumOfAltSettings; i++)

		{

		TInt8* endpoint = (TInt8*) (chunkHeader.iAltSettings->iAltTableOffset[i] + (TInt) iChunk->Base());

		TInt numOfEps = chunkHeader.GetNumberOfEndpoints(i);

        __ASSERT_DEBUG(numOfEps >= 0, User::Invariant());

		for (TInt j = 1; j <= numOfEps; j++)

			{

			TUsbcScHdrEndpointRecord* endpointInf = (TUsbcScHdrEndpointRecord*) &(endpoint[j * chunkHeader.iAltSettings->iEpRecordSize]);