// Copyright (c) 1999-2009 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 <drivers/mmc.h>

#include "OstTraceDefinitions.h"

#ifdef OST_TRACE_COMPILER_IN_USE

#ifdef __VC32__

#pragma warning(disable: 4127) // disabling warning "conditional expression is constant"

#endif

#include "sessionTraces.h"

#endif

//	--------  class DMMCSession  --------

EXPORT_C DMMCSession::DMMCSession(const TMMCCallBack& aCallBack)

/**

 * Constructor - initializes callbacks and timers.

 * Once the session has been engaged, the completion of the request is signalled by calling 

 * the function provided in aCallback. A session will be completed in this way if it has completed

 * normally, an error has occurred or the session has been stopped by this or another client.

 * @param aCallBack reference to a TMMCCallback object to be called upon completion.

 */

	: iCallBack(aCallBack),

#ifdef __EPOC32__

	iPollTimer(DMMCSession::PollTimerCallBack, this),

	iRetryTimer(DMMCSession::RetryTimerCallBack, this),

	iProgramTimer(DMMCSession::ProgramTimerCallBack, this),

#endif	// #ifdef __EPOC32__

	iConfig()

	{

	OstTraceFunctionEntry1( DMMCSESSION_DMMCSESSION_ENTRY, this );

	}

EXPORT_C DMMCSession::~DMMCSession()

/**

 * Destructor.

 */

	{

	OstTraceFunctionEntry1( DUP1_DMMCSESSION_DMMCSESSION_ENTRY, this );

	// Ensure that the stack isn't currently running in another thread's context, otherwise this session won't be 

	// removed from the stack's workset until some time later - by which time the session will have been deleted

	__ASSERT_ALWAYS(!iStackP->StackRunning(), DMMCSocket::Panic(DMMCSocket::EMMCNotInDfcContext));

	Abort();

	UnlockStack();

	OstTraceFunctionExit1( DUP1_DMMCSESSION_DMMCSESSION_EXIT, this );

	}

EXPORT_C void DMMCSession::SetCard(TMMCard* aCardP)

/**

 * Assigns a card to the session. The card pointer would normally be obtained via a call of DMMCStack::CardP(). 

 * Assigning a card to the session is the means by which a particular card in the stack is targeted for a 

 * particular request. Some requests involve broadcasting to the entire stack. However, the majority involve 

 * an individual card at some stage of the process and so an attempt to engage the session before a card has 

 * been assigned to it will generally fail straight away. It is possible to change the card assigned to the 

 * session as long as this is not attempted while the session is engaged.

 * @param aCardP A pointer to the card to be assigned to the session.

 */

	{

	OstTraceFunctionEntryExt( DMMCSESSION_SETCARD_ENTRY, this );

	iCardP = aCardP;

	iCID = iCardP->CID();

	OstTraceFunctionExit1( DMMCSESSION_SETCARD_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMReadBlock(TMMCArgument aDevAddr, TUint32 aLength, TUint8* aMemoryP)

/**

 * Sets the session up to perform the CIM_READ_BLOCK macro as outlined by the MMCA. 

 * Having set-up the session for this operation, the client must then engage the session before the operation can commence. 

 * The CIM_READ_BLOCK macro reads a single block from the card. It starts by setting the block length (CMD16) as specified 

 * in 'aLength'. It then reads a single block of data (CMD17) from the card at offset 'aDevAddr' on the card into system 

 * memory starting at address 'aMemoryP'.

 * @param aDevAddr Contains offset to the block to be read from the card

 * @param aLength Block length

 * @param aMemoryP host destination address

 */

	{

	OstTraceExt4(TRACE_FLOW, DMMCSESSION_SETUPCIMREADBLOCK_ENTRY, "DMMCSession::SetupCIMReadBlock;aDevAddr=%x;aLength=%x;aMemoryP=%x;this=%x", (TUint) aDevAddr, (TUint) aLength, (TUint) aMemoryP, (TUint) this);

	ResetCommandStack();

	FillCommandArgs(aDevAddr, aLength, aMemoryP, aLength);

	iSessionID = ECIMReadBlock;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMREADBLOCK_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMWriteBlock(TMMCArgument aDevAddr, TUint32 aLength, TUint8* aMemoryP)

/**

 * Set up the session to perform the CIM_WRITE_BLOCK macro as outlined by the MMCA.

 * Having set-up the session for this operation, the client must then engage the session before the operation can commence. 

 * The CIM_WRITE_BLOCK macro writes a single block to the card. It starts by setting the block length (CMD16) as specified 

 * in 'aLength'. It then writes a single block of data (CMD24) to the card at offset 'aDevAddr' on the card reading from system 

 * memory starting at address 'aMemoryP'.

 * @param aDevAddr Contains offset to the block to be written on the card

 * @param aLength Block length

 * @param aMemoryP Host source address

 */

	{

	OstTraceExt4(TRACE_FLOW, DMMCSESSION_SETUPCIMWRITEBLOCK_ENTRY, "DMMCSession::SetupCIMWriteBlock;aDevAddr=%x;aLength=%x;aMemoryP=%x;this=%x", (TUint) aDevAddr, (TUint) aLength, (TUint) aMemoryP, (TUint) this);

	ResetCommandStack();

	FillCommandArgs(aDevAddr, aLength, aMemoryP, aLength);

	iSessionID = ECIMWriteBlock;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMWRITEBLOCK_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMReadMBlock(TMMCArgument aDevAddr, TUint32 aLength, TUint8* aMemoryP, TUint32 aBlkLen)

/**

 * Set up the session to perform the CIM_READ_MBLOCK macro as outlined by the MMCA.

 * Having set-up the session for this operation, the client must then engage the session before the operation can commence. 

 * The CIM_READ_MBLOCK macro reads a series of blocks from the card. It starts by setting the block length (CMD16) as specified 

 * in 'aBlkLen'. It then issues the read multiple block command (CMD18) to continually transfer blocks from the card to host 

 * starting at offset 'aDevAddr' on the card into system memory starting at address 'aMemoryP'. This continues until 'aLength'

 * bytes have been read at which point the Controller issues the stop command (CMD12) to halt the transfer.

 * @param aDevAddr Contains offset to the block to be read from the card

 * @param aLength Total number of bytes to read.

 * @param aMemoryP Host destination address

 * @param aBlkLen Block length

 */

	{

	OstTraceExt5(TRACE_FLOW, DMMCSESSION_SETUPCIMREADMBLOCK_ENTRY, "DMMCSession::SetupCIMReadMBlock;aDevAddr=%x;aLength=%x;aMemoryP=%x;aBlkLen=%x;this=%x", (TUint) aDevAddr, (TUint) aLength, (TUint) aMemoryP, (TUint) aBlkLen,(TUint) this);

	ResetCommandStack();

	FillCommandArgs(aDevAddr, aLength, aMemoryP, aBlkLen);

	iSessionID = ECIMReadMBlock;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMREADMBLOCK_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMWriteMBlock(TMMCArgument aDevAddr, TUint32 aLength, TUint8* aMemoryP, TUint32 aBlkLen)

/**

 * Set up the session to perform the CIM_WRITE_MBLOCK macro as outlined by the MMCA.

 * Having set-up the session for this operation, the client must then engage the session before the operation can commence. 

 * The CIM_WRITE_MBLOCK macro writes a series of blocks to the card. It starts by setting the block length (CMD16) as specified 

 * in 'aBlkLen'. It then issues the write multiple block command (CMD25) to continually transfer blocks from host to the card 

 * starting at address 'aMemoryP' in system memory and offset 'aDevAddr' on the card.. This continues until 'aLength' bytes have 

 * been written at which point the Controller issues the stop command (CMD12) to halt the transfer

 * @param aDevAddr Contains offset to the block to be written on the card

 * @param aLength Total number of bytes to write.

 * @param aMemoryP Host source address

 * @param aBlkLen Block length

 */

	{

	OstTraceExt5(TRACE_FLOW, DMMCSESSION_SETUPCIMWRITEMBLOCK_ENTRY, "DMMCSession::SetupCIMWriteMBlock;aDevAddr=%x;aLength=%x;aMemoryP=%x;aBlkLen=%x;this=%x", (TUint) aDevAddr, (TUint) aLength, (TUint) aMemoryP, (TUint) aBlkLen,(TUint) this);

	ResetCommandStack();

	FillCommandArgs(aDevAddr, aLength, aMemoryP, aBlkLen);

	iSessionID = ECIMWriteMBlock;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMWRITEMBLOCK_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMEraseSector(TMMCArgument aDevAddr, TUint32 aLength)

/**

 * Set up the session to perform the CIM_ERASE_SECTOR macro broadly as outlined by the MMCA. 

 * However, the macro only performs a sector erase of a contiguous area and doesn't support the un-tagging of particular sectors 

 * within the initial tagged area. Having set-up the session for this operation, the client must then engage the session before 

 * the operation can commence. 

 * The CIM_ERASE_SECTOR macro erases a range of sectors on the card starting at offset 'aDevAddr' on the card and ending at offset 

 * 'aDevAdd'+'aLength'. The entire area specified must lie within a single erase group. (The erase group size can be read from the CSD).

 * The specified start offset and end offset need not coincide exactly with a sector boundary since the card will ignore LSBs below 

 * the sector size. The tag sector start command (CMD32) is first issued setting the address of the first sector to be erased. 

 * This is followed by the tag sector end command (CMD33) setting the address of the last sector to be erased. Now that the erase 

 * sectors are tagged, the erase command (CMD38) is sent followed by a send status command (CMD13) to read any additional status 

 * information from the card.

 * @param aDevAddr Contains offset to the first block to be erased

 * @param aLength Total number of bytes to erase

 */

	{

	OstTraceExt3(TRACE_FLOW, DMMCSESSION_SETUPCIMERASESECTOR_ENTRY, "DMMCSession::SetupCIMEraseSector;aDevAddr=%x;aLength=%x;this=%x", (TUint) aDevAddr, (TUint) aLength, (TUint) this);

	ResetCommandStack();

	FillCommandArgs(aDevAddr, aLength, NULL, 0);

	iSessionID = ECIMEraseSector;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMERASESECTOR_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMEraseGroup(TMMCArgument aDevAddr, TUint32 aLength)

/**

 * Set up the session to perform the CIM_ERASE_GROUP macro broadly as outlined by the MMCA. 

 * However, the macro only performs an erase group erase of a contiguous area and doesn't support the un-tagging of particular 

 * erase groups within the initial tagged area. Having set-up the session for this operation, the client must then engage the 

 * session before the operation can commence. 

 * The CIM_ERASE_GROUP macro erases a range of erase groups on the card starting at offset 'aDevAddr' on the card and ending at 

 * offset 'aDevAdd'+'aLength'. The specified start offset and end offset need not coincide exactly with an erase group boundary 

 * since the card will ignore LSBs below the erase group size. The tag ease group start command (CMD35) is first issued setting 

 * the address of the first erase group to be erased. This is followed by the tag erase group end command (CMD36) setting the 

 * address of the last erase group to be erased. Now that the erase groups are tagged, the erase command (CMD38) is sent followed 

 * by a send status command (CMD13) to read any additional status information from the card.

 * @param aDevAddr Contains offset to the first block to be erased

 * @param aLength Total number of bytes to erase

 */

	{

	OstTraceExt3(TRACE_FLOW, DMMCSESSION_SETUPCIMERASEGROUP_ENTRY, "DMMCSession::SetupCIMEraseGroup;aDevAddr=%x;aLength=%x;this=%x", (TUint) aDevAddr, (TUint) aLength, (TUint) this);

	ResetCommandStack();

	FillCommandArgs(aDevAddr, aLength, NULL, 0);

	iSessionID = ECIMEraseGroup;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMERASEGROUP_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMReadIO(TUint8 aRegAddr, TUint32 aLength, TUint8* aMemoryP)

/** 

 * Set up the session to perform the read i/o macro (CMD39).

 * This macro reads a stream of bytes from an I/O register on a MultiMediaCard. This makes use of the fast i/o (CMD39) command, 

 * reading 'aLength' bytes of data from I/O register 'aRegAddr' on the card into system memory starting at address 'aMemoryP'. 

 * Having set-up the session for this operation, the client must then engage the session before the operation can commence. 

 * @param aRegAddr Address of IO register

 * @param aLength Total number of bytes to read

 * @param aMemoryP Host destination address

 */

	{

	OstTraceFunctionEntryExt( DMMCSESSION_SETUPCIMREADIO_ENTRY, this );

	ResetCommandStack();

	FillCommandArgs(aRegAddr, aLength, aMemoryP, 0);

	iSessionID = ECIMReadIO;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMREADIO_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMWriteIO(TUint8 aRegAddr, TUint32 aLength, TUint8* aMemoryP)

/** 

 * Set up the session to perform the write i/o macro (CMD39). 

 * This macro writes a stream of bytes to an I/O register on a MultiMediaCard. This makes use of the fast i/o (CMD39) command,

 * writing 'aLength' bytes of data to I/O register 'aRegAddr' on the card from system memory starting at address 'aMemoryP'. 

 * Having set-up the session for this operation, the client must then engage the session before the operation can commence. 

 * @param aRegAddr Address of IO register

 * @param aLength Total number of bytes to write

 * @param aMemoryP Host source address

 */

	{

	OstTraceFunctionEntryExt( DMMCSESSION_SETUPCIMWRITEIO_ENTRY, this );

	ResetCommandStack();

	FillCommandArgs(aRegAddr, aLength, aMemoryP, 0);

	iSessionID = ECIMWriteIO;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMWRITEIO_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCIMLockUnlock(TUint32 aLength, TUint8* aMemoryP)

/**

 * Set up the session to perform the lock-unlock macro (CMD42). 

 * This macro is used to manage the password protection feature (if supported) on a MultiMediaCard. 

 * This same macro is used to lock or unlock a card, set or clear a password or force erase a card.  

 * Having set-up the session for the required operation, the client must then engage the session before 

 * the operation can commence. 

 * The block length (CMD16) as specified in 'aLength' is first set. The lock unlock command (CMD42) is 

 * then issued. This command has the same structure as a regular single block write command. 

 * A data block is written to the card from system memory starting at address 'aMemoryP'. The transferred 

 * data block should contain the password setting mode, the password length and the password data if appropriate.

 * @param aLength Block length

 * @param aMemoryP Host source address containing password data

 */

	{

	OstTraceFunctionEntryExt( DMMCSESSION_SETUPCIMLOCKUNLOCK_ENTRY, this );

	__KTRACE_OPT(KPBUS1, Kern::Printf("ms:slu%08x", aLength));

	ResetCommandStack();

	FillCommandDesc(ECmdLockUnlock);

	FillCommandArgs(0, aLength, aMemoryP, aLength);

	iSessionID = ECIMLockUnlock;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMLOCKUNLOCK_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupCommand(TMMCCommandEnum aCommand, TMMCArgument anArgument)

/** 

 * Set up the session to issue a raw command to the card. 

 * This raw command function should be used when issuing a known command with or without an argument. 

 * Having set-up the session for this operation, the client must then engage this session before 

 * the operation can commence.

 * @param aCommand Command to be sent

 * @param anArgument Associated argument

 */

	{

	OstTraceExt3(TRACE_FLOW, DMMCSESSION_SETUPCOMMAND_ENTRY, "DMMCSession::SetupCommand;aCommand=%d;anArgument=%x;this=%x", (TInt) aCommand, (TUint) anArgument, (TUint) this);

	ResetCommandStack();

	FillCommandDesc(aCommand, anArgument);

	iSessionID = ECIMNakedSession;

	OstTraceFunctionExit1( DMMCSESSION_SETUPCOMMAND_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupRSCommand(TMMCCommandEnum aCommand, TMMCArgument anArgument,

							TUint32 aResponseLength, TMMCCommandTypeEnum aCommandType,

							TMMCResponseTypeEnum aResponseType,

							TUint32 aCommandClass)

/**

 * Set up the session to issue a raw command to the card. 

 * This raw command function should be used when issuing an unknown command, an argument and an unknown response type.

 * Having set-up the session for this operation, the client must then engage this session before the operation can commence.

 * @param aCommand

 * @param anArgument

 * @param aResponseLength

 * @param aCommandType

 * @param aResponseType

 * @param aCommandClass

 * @todo Complete the parameter descriptions

 */

	{

	OstTraceExt4( TRACE_FLOW, DMMCSESSION_SETUPRSCOMMAND_ENTRY1, "DMMCSession::SetupRSCommand;aCommand=%d;anArgument=%x;aResponseLength=%x;this=%x", (TInt) aCommand, (TUint) anArgument, (TUint) aResponseLength, (TUint) this );

	OstTraceExt4( TRACE_FLOW, DMMCSESSION_SETUPRSCOMMAND_ENTRY2, "DMMCSession::SetupRSCommand;aCommandType=%d;aResponseType=%d;aCommandClass=%x;this=%x", (TInt) aCommandType, (TInt) aResponseType, (TUint) aCommandClass, (TUint) this );

	ResetCommandStack();

	FillCommandDesc(aCommand, anArgument);

	TMMCCommandSpec& cmdSpec = Command().iSpec;

	cmdSpec.iDirection = EDirNone;

	if( aResponseLength <= KMMCMaxResponseLength )

		cmdSpec.iResponseLength = aResponseLength;

	if( aCommandType != ECmdTypeUK )

		cmdSpec.iCommandType = aCommandType;

	if( aResponseType != ERespTypeUnknown )

		cmdSpec.iResponseType = aResponseType;

	if( aCommandClass != KMMCCmdClassNone )

		cmdSpec.iCommandClass = aCommandClass;

	iSessionID = ECIMNakedSession;

	OstTraceFunctionExit1( DMMCSESSION_SETUPRSCOMMAND_EXIT, this );

	}

EXPORT_C void DMMCSession::SetupDTCommand(TMMCCommandEnum aCommand, TMMCArgument anArgument,

							TUint32 aTotalLength, TUint8* aMemoryAddress, TUint32 aBlockLength,

							TBool aStopTransmission, TMMCCmdDirEnum aDir,

							TUint32 aCommandClass)

/**

 * Set up the session to issue a raw command to the card. 

 * This raw command function should be used when issuing a generic transfer command and argument.

 * Having set-up the session for this operation, the client must then engage this session before

 * the operation can commence.

 * @param aCommand

 * @param anArgument

 * @param aTotalLength

 * @param aMemoryAddress

 * @param aBlockLength

 * @param aStopTransmission

 * @param aDir

 * @param aCommandClass

 * @todo Complete the parameter descriptions

 */

	{

	OstTraceExt5( TRACE_FLOW, DMMCSESSION_SETUPDTCOMMAND_ENTRY1, "DMMCSession::SetupDTCommand;aCommand=%d;anArgument=%x;aTotalLength=%x;aMemoryAddress=%x;this=%x", (TInt) aCommand, (TUint) anArgument, (TUint) aTotalLength, (TUint) aMemoryAddress, (TUint) this );

	OstTraceExt5( TRACE_FLOW, DMMCSESSION_SETUPDTCOMMAND_ENTRY2, "DMMCSession::SetupDTCommand;aBlockLength=%x;aStopTransmission=%d;aDir=%d;aCommandClass=%x;this=%x", (TUint) aBlockLength, (TInt) aStopTransmission, (TInt) aDir, (TUint) aCommandClass , (TUint) this );

	ResetCommandStack();

	FillCommandDesc(aCommand);

	FillCommandArgs(anArgument, aTotalLength, aMemoryAddress, aBlockLength);

	TMMCCommandDesc& cmd = Command();

	if( aBlockLength == 0 )

		cmd.iBlockLength = aTotalLength;

	cmd.iSpec.iMultipleBlocks = (cmd.iBlockLength != aTotalLength);

	if( aStopTransmission )

		cmd.iSpec.iUseStopTransmission = ETrue;

	if( aDir != EDirNone )

		{

		cmd.iSpec.iUseStopTransmission = aStopTransmission;

		cmd.iSpec.iDirection = aDir;

		}

	if( aCommandClass != KMMCCmdClassNone )

		cmd.iSpec.iCommandClass = aCommandClass;

	iSessionID = ECIMNakedSession;

	OstTraceFunctionExit1( DMMCSESSION_SETUPDTCOMMAND_EXIT, this );

	}

void DMMCSession::SetupCIMControl(TInt aSessID)

//

// find matching macro function for supplied session

//

	{

	OstTraceFunctionEntryExt( DMMCSESSION_SETUPCIMCONTROL_ENTRY, this );

	TMMCSMSTFunc f = GetMacro(aSessID);

	if (f == 0)

		f = DMMCStack::NoSessionSMST;

	iSessionID = (TMMCSessionTypeEnum) aSessID;

	iBytesTransferred = 0;

	iMMCExitCode = KMMCErrNone;

	iState = 0;

	iInitContext = 0;

	iGlobalRetries = 0;

	iDoAbort = iDoStop = iDoComplete = EFalse;

	iBlockOn = 0;

	ResetCommandStack();

	iMachine.Setup(f, iStackP);

	OstTraceFunctionExit1( DMMCSESSION_SETUPCIMCONTROL_EXIT, this );

	}

EXPORT_C TMMCSMSTFunc DMMCSession::GetMacro(TInt aSessNum) const

	{

	TMMCSMSTFunc f = 0;

	static const TMMCSMSTFunc macros[KMMCMaxSessionTypeNumber] =

		{

		DMMCStack::NakedSessionSMST,

		DMMCStack::CIMUpdateAcqSMST,

		DMMCStack::CIMInitStackSMST,

		DMMCStack::CIMCheckStackSMST,

		DMMCStack::CIMSetupCardSMST,

		DMMCStack::CIMReadWriteBlocksSMST,			// CIMReadBlock

		DMMCStack::CIMReadWriteBlocksSMST,			// CIMWriteBlock

		DMMCStack::CIMReadWriteBlocksSMST,			// CIMReadMBlock

		DMMCStack::CIMReadWriteBlocksSMST,			// CIMWriteMBlock

		DMMCStack::CIMEraseSMST,

		DMMCStack::CIMEraseSMST,

		DMMCStack::CIMReadWriteIOSMST,

		DMMCStack::CIMReadWriteIOSMST,

		DMMCStack::CIMLockUnlockSMST,				// CIMLockUnlock

		DMMCStack::NoSessionSMST,					// CIMLockStack is never really executed as a session

		DMMCStack::InitStackAfterUnlockSMST,

		DMMCStack::CIMAutoUnlockSMST,

		DMMCStack::ExecSleepCommandSMST				// CIMSleep

		};

	if (aSessNum >= 0 && aSessNum < (TInt) KMMCMaxSessionTypeNumber)

		f = macros[aSessNum];

	return f;

	}

EXPORT_C TInt DMMCSession::Engage()

/**

 * Enque this session for execution on the DMMCStack object which is serving it.

 * @return KErrBadDriver if no stack is associated with the session

 * @return KErrServerBusy if the stack is currently locked (and KMMCModeEnqueIfLocked flag is cleared)

 * @return KErrNotReady if the media is not present

 * @return KErrNone if successful

 */

	{

	OstTraceFunctionEntry1( DMMCSESSION_ENGAGE_ENTRY, this );

	__KTRACE_OPT(KPBUS1,Kern::Printf(">ms:eng"));

	if( iStackP == NULL )

	    {

		OstTraceFunctionExitExt( DMMCSESSION_ENGAGE_EXIT, this, KErrBadDriver );

		return KErrBadDriver;

	    }

	if( iStackP->iLockingSessionP != NULL && iStackP->iLockingSessionP != this &&

		(iStackP->EffectiveModes(iConfig) & KMMCModeEnqueIfLocked) == 0 )

	    {

		OstTraceFunctionExitExt( DUP1_DMMCSESSION_ENGAGE_EXIT, this, KErrServerBusy );

		return KErrServerBusy;

	    }

	const TMediaState doorState=iStackP->MMCSocket()->iMediaChange->MediaState();

	__KTRACE_OPT(KPBUS1,Kern::Printf(">MMC:Eng ds = %x", doorState));

	OstTrace1( TRACE_INTERNALS, DMMCSESSION_ENGAGE, "doorState = 0x%x", doorState);

	if (doorState == EDoorOpen)

	    {

		OstTraceFunctionExitExt( DUP2_DMMCSESSION_ENGAGE_EXIT, this, KErrNotReady );

		return KErrNotReady;

	    }

	SetupCIMControl(iSessionID);

	iStackP->Add(this);

	__KTRACE_OPT(KPBUS1,Kern::Printf("<ms:eng"));

	OstTraceFunctionExitExt( DUP3_DMMCSESSION_ENGAGE_EXIT, this, KErrNone );

	return KErrNone;

	}

// Command specification table for standard MMC commands (CMD0 - CMD63)

extern const TMMCCommandSpec CommandTable[KMMCCommandMask+1] =

	{//  Class				  Type			Dir			MBlk	StopT	Rsp Type		  Len	Cmd No

	{KMMCCmdClassBasic,		ECmdTypeBC,		EDirNone,	EFalse, EFalse, ERespTypeNone,		0}, //CMD0

	{KMMCCmdClassBasic,		ECmdTypeBCR,	EDirNone,	EFalse, EFalse, ERespTypeR3,		4}, //CMD1

	{KMMCCmdClassBasic,		ECmdTypeBCR,	EDirNone,	EFalse, EFalse, ERespTypeR2,		16},//CMD2

	{KMMCCmdClassBasic,		ECmdTypeAC,		EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD3

	{KMMCCmdClassBasic,		ECmdTypeBC,		EDirNone,	EFalse, EFalse, ERespTypeNone,		0}, //CMD4

	{KMMCCmdClassBasic,		ECmdTypeAC,		EDirNone,	EFalse, EFalse, ERespTypeR1B,		0}, //CMD5 - SLEEP/AWAKE

	{KMMCCmdClassBasic,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1B,		0}, //CMD6

	{KMMCCmdClassBasic,		ECmdTypeAC,		EDirNone,	EFalse, EFalse, ERespTypeR1B,		4}, //CMD7

	{KMMCCmdClassBasic,		ECmdTypeADTCS,	EDirRead,	EFalse, EFalse, ERespTypeR1,		512}, //CMD8

	{KMMCCmdClassBasic,		ECmdTypeAC,		EDirNone,	EFalse, EFalse, ERespTypeR2,		16},//CMD9

	{KMMCCmdClassBasic,		ECmdTypeAC,		EDirNone,	EFalse, EFalse, ERespTypeR2,		16},//CMD10

	{KMMCCmdClassStreamRead,ECmdTypeADTCS,	EDirRead,	EFalse, ETrue,	ERespTypeR1,		4}, //CMD11

	{KMMCCmdClassBasic,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1B,		4}, //CMD12

	{KMMCCmdClassBasic,		ECmdTypeAC,		EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD13

	{KMMCCmdClassBlockRead,	ECmdTypeADTCS,	EDirRead,	EFalse, EFalse, ERespTypeR1,		4}, //CMD14 - BUSTEST_R

	{KMMCCmdClassBasic,		ECmdTypeAC,		EDirNone,	EFalse, EFalse, ERespTypeNone,		0}, //CMD15

	{KMMCCmdClassBlockRead,	ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD16

	{KMMCCmdClassBlockRead,	ECmdTypeADTCS,	EDirRead,	EFalse, EFalse, ERespTypeR1,		4}, //CMD17

	{KMMCCmdClassBlockRead,	ECmdTypeADTCS,	EDirRead,	ETrue,	ETrue,	ERespTypeR1,		4}, //CMD18

	{KMMCCmdClassBlockWrite,ECmdTypeADTCS,	EDirWrite,	EFalse, EFalse, ERespTypeR1,		4}, //CMD19 - BUSTEST_W

	{KMMCCmdClassStreamWrite,ECmdTypeADTCS, EDirWrite,	EFalse, ETrue,	ERespTypeR1,		4}, //CMD20

	{KMMCCmdClassNone,		ECmdTypeUK,		EDirNone,	EFalse, EFalse, ERespTypeUnknown,	0}, //CMD21

	{KMMCCmdClassNone,		ECmdTypeUK,		EDirNone,	EFalse, EFalse, ERespTypeUnknown,	0}, //CMD22

	{KMMCCmdClassBlockRead | 

	 KMMCCmdClassBlockWrite,ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1,	4}, //CMD23

	{KMMCCmdClassBlockWrite,ECmdTypeADTCS,	EDirWrite,	EFalse, EFalse, ERespTypeR1,		4}, //CMD24

	{KMMCCmdClassBlockWrite,ECmdTypeADTCS,	EDirWrite,	ETrue,	ETrue,	ERespTypeR1,		4}, //CMD25

	{KMMCCmdClassBlockWrite,ECmdTypeADTCS,	EDirWrite,	EFalse, EFalse, ERespTypeR1,		4}, //CMD26

	{KMMCCmdClassBlockWrite,ECmdTypeADTCS,	EDirWrite,	EFalse, EFalse, ERespTypeR1,		4}, //CMD27

	{KMMCCmdClassWriteProtection,ECmdTypeACS,EDirNone,	EFalse, EFalse, ERespTypeR1B,		4}, //CMD28

	{KMMCCmdClassWriteProtection,ECmdTypeACS,EDirNone,	EFalse, EFalse, ERespTypeR1B,		4}, //CMD29

	{KMMCCmdClassWriteProtection,ECmdTypeADTCS,EDirRead,EFalse, EFalse, ERespTypeR1,		4}, //CMD30

	{KMMCCmdClassNone,		ECmdTypeUK,		EDirNone,	EFalse, EFalse, ERespTypeUnknown,	0}, //CMD31

	{KMMCCmdClassErase,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD32

	{KMMCCmdClassErase,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD33

	{KMMCCmdClassErase,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD34

	{KMMCCmdClassErase,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD35

	{KMMCCmdClassErase,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD36

	{KMMCCmdClassErase,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1,		4}, //CMD37

	{KMMCCmdClassErase,		ECmdTypeACS,	EDirNone,	EFalse, EFalse, ERespTypeR1B,		4}, //CMD38

	{KMMCCmdClassIOMode,	ECmdTypeAC,		EDirNone,	EFalse, EFalse, ERespTypeR4,		4}, //CMD39