// Copyright (c) 2008-2009 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:

// e32test/iic/iic_psl/I2c.cpp

//

#include "i2c.h"

#ifdef IIC_INSTRUMENTATION_MACRO

#include <drivers/iic_trace.h>

#endif

#if defined(MASTER_MODE) && !defined(SLAVE_MODE)

const TInt KChannelTypeArray[NUM_CHANNELS] = {DIicBusChannel::EMaster, DIicBusChannel::EMaster, DIicBusChannel::EMaster};

#elif defined(MASTER_MODE) && defined(SLAVE_MODE)

const TInt KChannelTypeArray[NUM_CHANNELS] = {DIicBusChannel::EMaster, DIicBusChannel::ESlave, DIicBusChannel::EMasterSlave};

#else

const TInt KChannelTypeArray[NUM_CHANNELS] = {DIicBusChannel::ESlave, DIicBusChannel::ESlave, DIicBusChannel::ESlave};

#endif

#define CHANNEL_TYPE(n) (KChannelTypeArray[n])	

#define CHANNEL_DUPLEX(n) (DIicBusChannel::EHalfDuplex)

#ifdef STANDALONE_CHANNEL

_LIT(KPddNameI2c,"i2c_ctrless.pdd");

#else

_LIT(KPddNameI2c,"i2c.pdd");

#endif

#ifndef STANDALONE_CHANNEL

LOCAL_C TInt8 AssignChanNum()

	{

	static TInt8 iBaseChanNum = KI2cChannelNumBase;

	I2C_PRINT(("I2C AssignChanNum - on entry, iBaseChanNum = 0x%x\n",iBaseChanNum));

	return iBaseChanNum++; // Arbitrary, for illustration

	}

#endif/*STANDALONE_CHANNEL*/

#ifdef SLAVE_MODE

LOCAL_C TInt16 AssignSlaveChanId()

	{

	static TInt16 iBaseSlaveChanId = KI2cSlaveChannelIdBase;

	I2C_PRINT(("I2C AssignSlaveChanId - on entry, iBaseSlaveChanId = 0x%x\n",iBaseSlaveChanId));

	return iBaseSlaveChanId++; // Arbitrary, for illustration

	}

#endif/*SLAVE_MODE*/

NONSHARABLE_CLASS(DSimulatedI2cDevice) : public DPhysicalDevice

	{

// Class to faciliate loading of the IIC classes

public:

	class TCaps

		{

	public:

		TVersion iVersion;

		};

public:

	DSimulatedI2cDevice();

	virtual TInt Install();

	virtual TInt Create(DBase*& aChannel, TInt aUnit, const TDesC8* anInfo, const TVersion& aVer);

	virtual TInt Validate(TInt aUnit, const TDesC8* anInfo, const TVersion& aVer);

	virtual void GetCaps(TDes8& aDes) const;

	inline static TVersion VersionRequired();

	};

TVersion DSimulatedI2cDevice::VersionRequired()

	{

	I2C_PRINT(("DSimulatedI2cDevice::VersionRequired\n"));

	return TVersion(KIicClientMajorVersionNumber,KIicClientMinorVersionNumber,KIicClientBuildVersionNumber);

	}

/** Factory class constructor */

DSimulatedI2cDevice::DSimulatedI2cDevice()

	{

	I2C_PRINT(("DSimulatedI2cDevice::DSimulatedI2cDevice\n"));

    iVersion = DSimulatedI2cDevice::VersionRequired();

	}

TInt DSimulatedI2cDevice::Install()

    {

	I2C_PRINT(("DSimulatedI2cDevice::Install\n"));

    return(SetName(&KPddNameI2c));

    }

/**  Called by the kernel's device driver framework to create a Physical Channel. */

TInt DSimulatedI2cDevice::Create(DBase*& /*aChannel*/, TInt /*aUint*/, const TDesC8* /*anInfo*/, const TVersion& /*aVer*/)

    {

	I2C_PRINT(("DSimulatedI2cDevice::Create\n"));

    return KErrNone;

    }

/**  Called by the kernel's device driver framework to check if this PDD is suitable for use with a Logical Channel.*/

TInt DSimulatedI2cDevice::Validate(TInt /*aUnit*/, const TDesC8* /*anInfo*/, const TVersion& aVer)

    {

	I2C_PRINT(("DSimulatedI2cDevice::Validate\n"));

   	if (!Kern::QueryVersionSupported(DSimulatedI2cDevice::VersionRequired(),aVer))

		return(KErrNotSupported);

    return KErrNone;

    }

/** Return the driver capabilities */

void DSimulatedI2cDevice::GetCaps(TDes8& aDes) const

    {

	I2C_PRINT(("DSimulatedI2cDevice::GetCaps\n"));

	// Create a capabilities object

	TCaps caps;

	caps.iVersion = iVersion;

	// Zero the buffer

	TInt maxLen = aDes.MaxLength();

	aDes.FillZ(maxLen);

	// Copy capabilities

	TInt size=sizeof(caps);

	if(size>maxLen)

	   size=maxLen;

	aDes.Copy((TUint8*)&caps,size);

    }

// supported channels for this implementation

static DIicBusChannel* ChannelPtrArray[NUM_CHANNELS];

//DECLARE_EXTENSION_WITH_PRIORITY(BUS_IMPLMENTATION_PRIORITY)	

DECLARE_STANDARD_PDD()		// I2c test driver to be explicitly loaded as an LDD, not kernel extension

	{	

#ifndef STANDALONE_CHANNEL

	DIicBusChannel* chan=NULL;

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

		{

	I2C_PRINT(("\n"));

#if defined(MASTER_MODE)

		if(CHANNEL_TYPE(i) == (DIicBusChannel::EMaster))

			{

			chan=new DSimulatedIicBusChannelMasterI2c(BUS_TYPE,CHANNEL_DUPLEX(i));

			if(!chan)

				return NULL;

			I2C_PRINT(("I2C chan created at 0x%x\n",chan));

			if(((DSimulatedIicBusChannelMasterI2c*)chan)->Create()!=KErrNone)

			    {

			    delete chan;

				return NULL;

                }

			}

#endif

#if defined(MASTER_MODE) && defined(SLAVE_MODE)

		if(CHANNEL_TYPE(i) == DIicBusChannel::EMasterSlave)

			{

			DIicBusChannel* chanM=new DSimulatedIicBusChannelMasterI2c(BUS_TYPE,CHANNEL_DUPLEX(i));

			if(!chanM)

				return NULL;

			DIicBusChannel* chanS=new DSimulatedIicBusChannelSlaveI2c(BUS_TYPE,CHANNEL_DUPLEX(i));

			if(!chanS)

			    {

			    delete chanM;

				return NULL;

			    }

			// For MasterSlave channel, the channel number for both the Master and Slave channels must be the same

			TInt8 msChanNum = ((DSimulatedIicBusChannelMasterI2c*)chanM)->GetChanNum();

			((DSimulatedIicBusChannelSlaveI2c*)chanS)->SetChanNum(msChanNum);

			chan=new DSimulatedIicBusChannelMasterSlaveI2c(BUS_TYPE,CHANNEL_DUPLEX(i),(DSimulatedIicBusChannelMasterI2c*)chanM,(DSimulatedIicBusChannelSlaveI2c*)chanS); // Generic implementation

			if(!chan)

			    {

			    delete chanM;

			    delete chanS;

				return NULL;

			    }

			I2C_PRINT(("I2C chan created at 0x%x\n",chan));

			if(((DIicBusChannelMasterSlave*)chan)->DoCreate()!=KErrNone)

			    {

			    delete chanM;

			    delete chanS;

			    delete chan;

				return NULL;

			    }

			}

#endif

#if defined(SLAVE_MODE)

		if(CHANNEL_TYPE(i) == (DIicBusChannel::ESlave))

			{

			chan=new DSimulatedIicBusChannelSlaveI2c(BUS_TYPE,CHANNEL_DUPLEX(i));

			if(!chan)

				return NULL;

			I2C_PRINT(("I2C chan created at 0x%x\n",chan));

			if(((DSimulatedIicBusChannelSlaveI2c*)chan)->Create()!=KErrNone)

			    {

			    delete chan;

			    return NULL;

			    }

			}

#endif

#if !defined(MASTER_MODE) && !defined(SLAVE_MODE)

#error I2C mode not defined as Master, Slave nor Master-Slave

#endif

		if(chan == NULL)

			{

			I2C_PRINT(("\n\nI2C: Channel of type (%d) not created for index %d\n\n",CHANNEL_TYPE(i),i));

			return NULL;

			}

		ChannelPtrArray[i]=chan;

		}

	I2C_PRINT(("\nI2C PDD, channel creation loop done- about to invoke RegisterChannels\n\n"));

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_REGISTERCHANS_START_PSL_TRACE;

#endif

	TInt r=DIicBusController::RegisterChannels(ChannelPtrArray,NUM_CHANNELS);

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_REGISTERCHANS_END_PSL_TRACE;

#endif

	I2C_PRINT(("\nI2C - returned from RegisterChannels with r=%d\n",r));

	if(r!=KErrNone)

		{

		delete chan;

		return NULL;

		}

#endif

	}

#ifdef MASTER_MODE

#ifdef STANDALONE_CHANNEL

EXPORT_C

#endif

DSimulatedIicBusChannelMasterI2c::DSimulatedIicBusChannelMasterI2c(const TBusType aBusType, const TChannelDuplex aChanDuplex)

	: DIicBusChannelMaster(aBusType,aChanDuplex)

	{

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DSimulatedIicBusChannelMasterI2c, aBusType=%d,aChanDuplex=%d\n",aBusType,aChanDuplex));

#ifndef STANDALONE_CHANNEL

	iChannelNumber = AssignChanNum();

#endif

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DSimulatedIicBusChannelMasterI2c, iChannelNumber=%d\n",iChannelNumber));

	}

TInt DSimulatedIicBusChannelMasterI2c::DoCreate()

	{

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DoCreate\n"));

	TInt r=Init();	// PIL Base class initialisation

	r=Kern::DynamicDfcQCreate(iDynamicDfcQ,KI2cThreadPriority,KI2cThreadName);

	if(r == KErrNone)

		SetDfcQ((TDfcQue*)iDynamicDfcQ);

	DSimulatedIicBusChannelMasterI2c::SetRequestDelayed(this,EFalse);

	return r;

	}

TInt DSimulatedIicBusChannelMasterI2c::CheckHdr(TDes8* aHdr)

	{

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::CheckHdr\n"));

	TConfigI2cBufV01* i2cBuf = (TConfigI2cBufV01*)aHdr;

	TConfigI2cV01* i2cPtr = &((*i2cBuf)());

	// Check that the values for address type, clock speed, user operation and endianness are recognised

	if((i2cPtr->iAddrType < 0) || (i2cPtr->iAddrType > EI2cAddr10Bit))

		{

		I2C_PRINT(("ERROR: DSimulatedIicBusChannelMasterI2c::CheckHdr unrecognised address type identifier %d\n",i2cPtr->iAddrType));

		return KErrArgument;

		}

	if(i2cPtr->iClkSpeedHz < 0)

		{

		I2C_PRINT(("ERROR: DSimulatedIicBusChannelMasterI2c::CheckHdr negative clock speed specified %d\n",i2cPtr->iClkSpeedHz));

		return KErrArgument;

		}

	if((i2cPtr->iEndianness < 0) || (i2cPtr->iEndianness > ELittleEndian))

		{

		I2C_PRINT(("ERROR: DSimulatedIicBusChannelMasterI2c::CheckHdr unrecognised endianness identifier %d\n",i2cPtr->iEndianness));

		return KErrArgument;

		}

	// Values for the timeout period are arbitrary - can only check it is not a negative value

	if(i2cPtr->iTimeoutPeriod < 0)

		{

		I2C_PRINT(("ERROR: DSimulatedIicBusChannelMasterI2c::CheckHdr negative timeout period %d\n",i2cPtr->iTimeoutPeriod));

		return KErrArgument;

		}

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::CheckHdr address type = %d\n",i2cPtr->iAddrType));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::CheckHdr clock speed ID = %d\n",i2cPtr->iClkSpeedHz));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::CheckHdr iEndianness ID = %d\n",i2cPtr->iEndianness));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::CheckHdr iTimeoutPeriod = %d\n",i2cPtr->iTimeoutPeriod));

	return KErrNone;

	}

	// Gateway function for PSL implementation, invoked for DFC processing

TInt DSimulatedIicBusChannelMasterI2c::DoRequest(TIicBusTransaction* aTransaction)

	{

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DoRequest invoked with aTransaction=0x%x\n",aTransaction));

	TInt r = KErrNone;

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_MPROCESSTRANS_START_PSL_TRACE;

#endif

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans aTransaction->iHeader=0x%x\n",GetTransactionHeader(aTransaction)));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans aTransaction->iHalfDuplexTrans=0x%x\n",GetTransHalfDuplexTferPtr(aTransaction)));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans aTransaction->iFullDuplexTrans=0x%x\n",GetTransFullDuplexTferPtr(aTransaction)));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans aTransaction->iCallback=0x%x\n",GetTransCallback(aTransaction)));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans aTransaction->iFlags=0x%x\n",GetTransFlags(aTransaction)));

	I2C_PRINT(("\nDSimulatedIicBusChannelMasterI2c::DoRequest, iHeader info \n"));

	TDes8* bufPtr = GetTransactionHeader(aTransaction);

	if(bufPtr == NULL)

		{

		I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DoRequest ERROR - NULL header\n"));

		return KErrCorrupt;

		}

	TConfigI2cV01 *buf = (TConfigI2cV01 *)(bufPtr->Ptr());

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DoRequest, header address type=0x%x\n",buf->iAddrType));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DoRequest, header clock speed=0x%x\n",buf->iClkSpeedHz));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DoRequest, header endianness=0x%x\n",buf->iEndianness));

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::DoRequest, header timeout period=0x%x\n",buf->iTimeoutPeriod));

	(void)buf;	// Silence compiler when I2C_PRINT not used

	TInt aTime=1000000/NKern::TickPeriod();

	r = StartSlaveTimeOutTimer(aTime);

	I2C_PRINT(("\nDSimulatedIicBusChannelMasterI2c::ProcessTrans, iHalfDuplexTrans info \n"));

	TIicBusTransfer* halfDuplexPtr=GetTransHalfDuplexTferPtr(aTransaction);

	while(halfDuplexPtr != NULL)

		{

		I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans transfer type=0x%x\n",GetTferType(halfDuplexPtr)));

		I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans granularity=0x%x\n",GetTferBufGranularity(halfDuplexPtr)));

		I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans transfer buffer=0x%x\n",GetTferBuffer(halfDuplexPtr)));

		I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans next transfer =0x%x\n",GetTferNextTfer(halfDuplexPtr)));

		halfDuplexPtr=GetTferNextTfer(halfDuplexPtr);

		}

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans - End of iHalfDuplexTrans info"));

	while(IsRequestDelayed(this))

		{

		I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans - starting Sleep...\n"));

		NKern::Sleep(1000);	// 1000 is arbitrary

		I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans - completed Sleep, check if still delayed\n"));

		}; 

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::ProcessTrans - exiting\n"));

	return r;

	}

TBool DSimulatedIicBusChannelMasterI2c::IsRequestDelayed(DSimulatedIicBusChannelMasterI2c* aChan)

	{

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::IsRequestDelayed invoked for aChan=0x%x\n",aChan));

	return aChan->iReqDelayed;

	}

void DSimulatedIicBusChannelMasterI2c::SetRequestDelayed(DSimulatedIicBusChannelMasterI2c* aChan,TBool aDelay) 

	{

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::SetRequestDelayed invoked for aChan=0x%x, with aDelay=0x%d\n",aChan,aDelay));

	aChan->iReqDelayed=aDelay;

	}

TInt DSimulatedIicBusChannelMasterI2c::HandleSlaveTimeout()

	{

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::HandleSlaveTimeout invoked for this=0x%x\n",this));

	return KErrTimedOut;

	}

TInt DSimulatedIicBusChannelMasterI2c::StaticExtension(TUint aFunction, TAny* aParam1, TAny* aParam2)

	{

	I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::StaticExtension\n"));

	TInt r = KErrNone;

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_MSTATEXT_START_PSL_TRACE;

#endif

	(void)aParam1;

	(void)aParam2;

	// Test values of aFunction were shifted left one place by the (test) client driver

	// Return to its original value.

	if(aFunction>KTestControlIoPilOffset)

		aFunction >>= 1;

	switch(aFunction)

		{

		case(RBusDevIicClient::ECtlIoDumpChan):

			{

#ifdef _DEBUG

			DumpChannel();

#endif

			break;

			}

		case(RBusDevIicClient::ECtlIoBlockReqCompletion):

			{

			I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::Blocking request completion\n"));

			SetRequestDelayed(this, ETrue);

			break;

			}

		case(RBusDevIicClient::ECtlIoUnblockReqCompletion):

			{

			I2C_PRINT(("DSimulatedIicBusChannelMasterI2c::Unlocking request completion\n"));

			SetRequestDelayed(this, EFalse);

			break;

			}

		case(RBusDevIicClient::ECtlIoDeRegChan):

			{

#ifndef STANDALONE_CHANNEL

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_DEREGISTERCHAN_START_PSL_TRACE;

#endif

			I2C_PRINT(("DSimulatedIicBusChannelMasterI2c: deregister channel\n"));

			r=DIicBusController::DeRegisterChannel(this);

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_DEREGISTERCHAN_END_PSL_TRACE;

#endif/*IIC_INSTRUMENTATION_MACRO*/

#else/*STANDALONE_CHANNEL*/

			r = KErrNotSupported;

#endif/*STANDALONE_CHANNEL*/

			break;

			}

		default:

			{

			Kern::Printf("aFunction %d is not recognised \n",aFunction);

			r=KErrNotSupported;

			}

		}

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_MSTATEXT_END_PSL_TRACE;

#endif		

	return r;

	}

//#ifdef MASTER_MODE

#endif

#ifdef SLAVE_MODE

void DSimulatedIicBusChannelSlaveI2c::SlaveAsyncSimCallback(TAny* aPtr)

	{

	// To support simulating an asynchronous capture operation

	// NOTE: this will be invoked in the context of DfcThread1

	I2C_PRINT(("SlaveAsyncSimCallback\n"));

	DSimulatedIicBusChannelSlaveI2c* channel = (DSimulatedIicBusChannelSlaveI2c*)aPtr;

	TInt r=KErrNone;// Just simulate successful capture

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_SCAPTCHANASYNC_END_PSL_TRACE;

#endif

	channel->ChanCaptureCb(r);

	}

#ifdef STANDALONE_CHANNEL

EXPORT_C

#endif

DSimulatedIicBusChannelSlaveI2c::DSimulatedIicBusChannelSlaveI2c(const DIicBusChannel::TBusType aBusType, const DIicBusChannel::TChannelDuplex aChanDuplex)

	: DIicBusChannelSlave(aBusType,aChanDuplex,0), // 0 to be ignored by base class

	iBlockedTrigger(0),iBlockNotification(EFalse),

	iSlaveTimer(DSimulatedIicBusChannelSlaveI2c::SlaveAsyncSimCallback,this)

	{

	I2C_PRINT(("DSimulatedIicBusChannelSlaveI2c::DSimulatedIicBusChannelSlaveI2c, aBusType=%d,aChanDuplex=%d\n",aBusType,aChanDuplex));

#ifndef STANDALONE_CHANNEL

	iChannelNumber = AssignChanNum();

#endif

	iChannelId = AssignSlaveChanId();

	I2C_PRINT(("DSimulatedIicBusChannelSlaveI2c::DSimulatedIicBusChannelSlaveI2c, iChannelNumber=%d, iChannelId=0x%x\n",iChannelNumber,iChannelId));

	}

DSimulatedIicBusChannelSlaveI2c::~DSimulatedIicBusChannelSlaveI2c()

	{

	I2C_PRINT(("DSimulatedIicBusChannelSlaveI2c::~DSimulatedIicBusChannelSlaveI2c\n"));

	}

TInt DSimulatedIicBusChannelSlaveI2c::DoCreate()

	{

	I2C_PRINT(("DSimulatedIicBusChannelSlaveI2c::DoCreate\n"));

	TInt r=Init();	// PIL Base class initialisation

	return r;

	}

TInt DSimulatedIicBusChannelSlaveI2c::CaptureChannelPsl(TBool aAsynch)

	{

	I2C_PRINT(("DSimulatedIicBusChannelSlaveI2c::CaptureChannelPsl\n"));

	TInt r = KErrNone;

	if(aAsynch)

		{

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_SCAPTCHANASYNC_START_PSL_TRACE;

#endif

		// To simulate an asynchronous capture operation, just set a timer to expire

		iSlaveTimer.OneShot(1000, ETrue); // Arbitrary timeout - expiry executes callback in context of DfcThread1

		}

	else

		{

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_SCAPTCHANSYNC_START_PSL_TRACE;

#endif

		// PSL processing would happen here ...

		// Expected to include implementation of the header configuration information 

		I2C_PRINT(("DSimulatedIicBusChannelSlaveI2c::CaptureChannelPsl (synchronous) ... no real processing to do \n"));

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_SCAPTCHANSYNC_END_PSL_TRACE;

#endif

		}

	return r;

	}

TInt DSimulatedIicBusChannelSlaveI2c::ReleaseChannelPsl()

	{

	I2C_PRINT(("DSimulatedIicBusChannelSlaveI2c::ReleaseChannelPsl\n"));

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_SRELCHAN_START_PSL_TRACE;

#endif

	TInt r = KErrNone;

	// PSL-specific processing would happen here ...

	I2C_PRINT(("DSimulatedIicBusChannelSlaveI2c::ReleaseChannelPsl ... no real processing to do \n"));

#ifdef IIC_INSTRUMENTATION_MACRO

	IIC_SRELCHAN_END_PSL_TRACE;

#endif

	return r;

	}