// Copyright (c) 1996-2009 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:

// e32\drivers\medint\iram.cpp

// 

//

#include "locmedia.h"

#include "platform.h"

#include "variantmediadef.h"

_LIT(KPddName, "Media.IRam");

class DPhysicalDeviceMediaIRam : public DPhysicalDevice

	{

public:

	DPhysicalDeviceMediaIRam();

	virtual TInt Install();

	virtual void GetCaps(TDes8& aDes) const;

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

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

	virtual TInt Info(TInt aFunction, TAny* a1);

	};

class DMediaDriverIRam : public DMediaDriver

	{

public:

	DMediaDriverIRam(TInt aMediaId);

public:

	// replacing pure virtual

	virtual TInt Request(TLocDrvRequest& aRequest);

	virtual void Disconnect(DLocalDrive* aLocalDrive, TThreadMessage* aMsg);

	virtual TInt PartitionInfo(TPartitionInfo &anInfo);

	virtual void NotifyPowerDown();

	virtual void NotifyEmergencyPowerDown();

public:

	TInt DoCreate(TInt aMediaId);

	TInt Caps(TLocDrvRequest& aRequest);

	TInt Read(TLocDrvRequest& aRequest);

	TInt Write(TLocDrvRequest& aRequest);

	TInt Format(TLocDrvRequest& aRequest);

	TInt Enlarge(TLocDrvRequest& aRequest);

	TInt Reduce(TLocDrvRequest& aRequest);

	};

DPhysicalDeviceMediaIRam::DPhysicalDeviceMediaIRam()

//

// Constructor

//

	{

	iUnitsMask=0x1;

	iVersion=TVersion(KMediaDriverInterfaceMajorVersion,KMediaDriverInterfaceMinorVersion,KMediaDriverInterfaceBuildVersion);

	}

TInt DPhysicalDeviceMediaIRam::Install()

//

// Install the Internal Ram Media PDD.

//

	{

	return SetName(&KPddName);

	}

void DPhysicalDeviceMediaIRam::GetCaps(TDes8& /*aDes*/) const

//

// Return the media drivers capabilities.

//

	{

	}

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

//

// Create an Internal Ram media driver.

//

	{

	if (!Kern::QueryVersionSupported(iVersion,aVer))

		return KErrNotSupported;

	TInt r=KErrNoMemory;

	DMediaDriverIRam* pD=new DMediaDriverIRam(aMediaId);

	aChannel=pD;

	if (pD)

		r=pD->DoCreate(aMediaId);

	TInternalRamDrive::Unlock();

	return r;

	}

TInt DPhysicalDeviceMediaIRam::Validate(TInt aDeviceType, const TDesC8* /*anInfo*/, const TVersion& aVer)

	{

	if (!Kern::QueryVersionSupported(iVersion,aVer))

		return KErrNotSupported;

	if (aDeviceType!=MEDIA_DEVICE_IRAM)

		return KErrNotSupported;

	return KErrNone;

	}

TInt DPhysicalDeviceMediaIRam::Info(TInt aFunction, TAny*)

//

// Return the priority of this media driver

//

	{

	if (aFunction==EPriority)

		return KMediaDriverPriorityNormal;

	return KErrNotSupported;

	}

DMediaDriverIRam::DMediaDriverIRam(TInt aMediaId)

//

// Constructor.

//

	:	DMediaDriver(aMediaId)

	{}

TInt DMediaDriverIRam::DoCreate(TInt /*aMediaId*/)

//

// Create the media driver.

//

	{

	TInt size=TInternalRamDrive::Size();

	if (size<0)

		return KErrGeneral;		// no RAM drive!

	SetTotalSizeInBytes(size);

	return(KErrNone);

	}

TInt DMediaDriverIRam::Request(TLocDrvRequest& m)

	{

	TInt request=m.Id();

	__KTRACE_OPT(KLOCDRV,Kern::Printf(">DMediaDriverIRam::Request %d",request));

	TInt r=KErrNotSupported;

	NKern::ThreadEnterCS();

	TInternalRamDrive::Wait();

	switch (request)

		{

		case DLocalDrive::ECaps:

			r=Caps(m);

			break;

		case DLocalDrive::ERead:

			r=Read(m);

			break;

		case DLocalDrive::EWrite:

			r=Write(m);

			break;

		case DLocalDrive::EFormat:

			r=Format(m);

			break;

		case DLocalDrive::EEnlarge:

			r=Enlarge(m);

			break;

		case DLocalDrive::EReduce:

			r=Reduce(m);

			break;

		default:

			r=KErrNotSupported;

			break;

		}

	TInternalRamDrive::Signal();

	NKern::ThreadLeaveCS();

	__KTRACE_OPT(KLOCDRV,Kern::Printf("<DMediaDriverIRam::Request %d",r));

	return r;

	}

void DMediaDriverIRam::Disconnect(DLocalDrive* /*aLocalDrive*/, TThreadMessage*)

	{

	// no action required

	}

void DMediaDriverIRam::NotifyPowerDown()

	{

	// no action required

	}

void DMediaDriverIRam::NotifyEmergencyPowerDown()

	{

	// no action required

	}

TInt DMediaDriverIRam::Caps(TLocDrvRequest& m)

	{

	TLocalDriveCapsV6& caps=*(TLocalDriveCapsV6*)m.RemoteDes();

	caps.iType=EMediaRam;

	caps.iDriveAtt=KDriveAttLocal|KDriveAttInternal;

	caps.iMediaAtt=KMediaAttVariableSize|KMediaAttFormattable;

    caps.iBaseAddress=(TUint8*)TInternalRamDrive::Base();

	caps.iFileSystemId=KDriveFileSysFAT;

	caps.iPartitionType=KPartitionTypeFAT16;

	caps.iSize=m.Drive()->iPartitionLen;

	caps.iHiddenSectors=0;

	caps.iEraseBlockSize=TInternalRamDrive::MaxSize();	// overload for RAM drive to avoid

														// F32 depending on memory model

	caps.iBlockSize=1;

	return KErrNone;									

	}

TInt DMediaDriverIRam::Read(TLocDrvRequest& m)

	{

	Int64 pos=m.Pos();

	Int64 length=m.Length();

	if (length<0 || pos<0 || (pos+length)>KMaxTInt)

		return KErrGeneral;

	TInt p=(TInt)pos;

	TInt l=(TInt)length;

	if (p+l>TInternalRamDrive::Size())

		return KErrGeneral;

	TPtrC8 des((TUint8*)TInternalRamDrive::Base()+p,l);

	TInt r=m.WriteRemote(&des,0);

	return r;

	}

TInt DMediaDriverIRam::Write(TLocDrvRequest& m)

	{

	Int64 pos=m.Pos();

	Int64 length=m.Length();

	if (length<0 || pos<0 || (pos+length)>KMaxTInt)

		return KErrGeneral;

	TInt p=(TInt)pos;

	TInt l=(TInt)length;

	if (p+l>TInternalRamDrive::Size())

		return KErrGeneral;

	TPtr8 des((TUint8*)TInternalRamDrive::Base()+p,l,l);

	TInt r=m.ReadRemote(&des,0);

	return r;

	}

TInt DMediaDriverIRam::Format(TLocDrvRequest& m)

	{

	Int64 pos=m.Pos();

	Int64 length=m.Length();

	if (length<0 || pos<0 || (pos+length)>KMaxTInt)

		return KErrGeneral;

	TInt p=(TInt)pos;

	TInt l=(TInt)length;

	if (p+l>TInternalRamDrive::Size())

		return KErrGeneral;

	memclr((TUint8*)TInternalRamDrive::Base()+p, l);

	return KErrNone;

	}

TInt DMediaDriverIRam::Enlarge(TLocDrvRequest& m)

//

// Enlarge the drive

//

	{

	TInt length=(TInt)m.Length();

	__KTRACE_OPT(KLOCDRV,Kern::Printf(">IRam::Enlarge (%d)",length));

	Int64 newLen=TotalSizeInBytes();

	newLen+=length;

	if (newLen>KMaxTInt)

		return(KErrGeneral);

	TInt r=TInternalRamDrive::Adjust((TInt)newLen);

	if (r==KErrNone)

		{

		SetTotalSizeInBytes(newLen,m.Drive());

		__KTRACE_OPT(KLOCDRV,Kern::Printf("Enlarge-Success (S:0x%lx RS:%d)",TotalSizeInBytes(),TInternalRamDrive::Size()));

		}

	else if (r==KErrNoMemory)

		r=KErrDiskFull;

	return r;

	}

TInt DMediaDriverIRam::Reduce(TLocDrvRequest& m)

//

// Reduce in size the drive

//

	{

	Int64 pos=m.Pos();

	TInt length=(TInt)m.Length();

	if (pos>KMaxTInt)

		return(KErrGeneral);

	__KTRACE_OPT(KLOCDRV,Kern::Printf(">IRam::ReduceSize (%d@%d)",length,(TInt)pos));

	TUint8 *Trg=(TUint8*)TInternalRamDrive::Base()+(TInt)pos;

	TInt len=TInternalRamDrive::Size()-((TInt)pos+length);

	memmove((TAny*)Trg,(TAny*)(Trg+length),len);

	len=TInternalRamDrive::Size()-length;

	TInt r=TInternalRamDrive::Adjust(len);

	if (r==KErrNone)

		{

		SetTotalSizeInBytes(len,m.Drive());

		__KTRACE_OPT(KLOCDRV,Kern::Printf("ReduceSize-Success (S:0x%lx RS:%d)",TotalSizeInBytes(),TInternalRamDrive::Size()));

		}

	return r;

	}

TInt DMediaDriverIRam::PartitionInfo(TPartitionInfo& anInfo)

//

// Return partition information on the media.

//

	{

	anInfo.iPartitionCount=1;

	anInfo.iEntry[0].iPartitionBaseAddr=0;

	anInfo.iEntry[0].iPartitionLen=anInfo.iMediaSizeInBytes=TotalSizeInBytes();

	anInfo.iEntry[0].iPartitionType=KPartitionTypeFAT16;

	return KErrNone;

	}

DECLARE_EXTENSION_PDD()

	{

	return new DPhysicalDeviceMediaIRam;

	}

static const TInt IRamDriveNumbers[IRAM_DRIVECOUNT]={IRAM_DRIVELIST};	

_LIT(KIRamDriveName,IRAM_DRIVENAME);

DECLARE_STANDARD_EXTENSION()

	{

	__KTRACE_OPT(KBOOT,Kern::Printf("Registering IRAM drive"));

	TInt r=KErrNoMemory;

	DPrimaryMediaBase* pM=new DPrimaryMediaBase;

	if (pM)

		{

		r=LocDrv::RegisterMediaDevice(MEDIA_DEVICE_IRAM,IRAM_DRIVECOUNT,&IRamDriveNumbers[0],pM,IRAM_NUMMEDIA,KIRamDriveName);

		}

	__KTRACE_OPT(KBOOT,Kern::Printf("Registering IRAM drive - return %d",r));

	return r;

	}