sl@0: // Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // e32\drivers\medint\iram.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "locmedia.h"
sl@0: #include "platform.h"
sl@0: #include "variantmediadef.h"
sl@0: 
sl@0: _LIT(KPddName, "Media.IRam");
sl@0: 
sl@0: class DPhysicalDeviceMediaIRam : public DPhysicalDevice
sl@0: 	{
sl@0: public:
sl@0: 	DPhysicalDeviceMediaIRam();
sl@0: 	virtual TInt Install();
sl@0: 	virtual void GetCaps(TDes8& aDes) const;
sl@0: 	virtual TInt Create(DBase*& aChannel, TInt aMediaId, const TDesC8* anInfo, const TVersion& aVer);
sl@0: 	virtual TInt Validate(TInt aDeviceType, const TDesC8* anInfo, const TVersion& aVer);
sl@0: 	virtual TInt Info(TInt aFunction, TAny* a1);
sl@0: 	};
sl@0: 								
sl@0: class DMediaDriverIRam : public DMediaDriver
sl@0: 	{
sl@0: public:
sl@0: 	DMediaDriverIRam(TInt aMediaId);
sl@0: public:
sl@0: 	// replacing pure virtual
sl@0: 	virtual TInt Request(TLocDrvRequest& aRequest);
sl@0: 	virtual void Disconnect(DLocalDrive* aLocalDrive, TThreadMessage* aMsg);
sl@0: 	virtual TInt PartitionInfo(TPartitionInfo &anInfo);
sl@0: 	virtual void NotifyPowerDown();
sl@0: 	virtual void NotifyEmergencyPowerDown();
sl@0: public:
sl@0: 	TInt DoCreate(TInt aMediaId);
sl@0: 	TInt Caps(TLocDrvRequest& aRequest);
sl@0: 	TInt Read(TLocDrvRequest& aRequest);
sl@0: 	TInt Write(TLocDrvRequest& aRequest);
sl@0: 	TInt Format(TLocDrvRequest& aRequest);
sl@0: 	TInt Enlarge(TLocDrvRequest& aRequest);
sl@0: 	TInt Reduce(TLocDrvRequest& aRequest);
sl@0: 	};
sl@0: 
sl@0: DPhysicalDeviceMediaIRam::DPhysicalDeviceMediaIRam()
sl@0: //
sl@0: // Constructor
sl@0: //
sl@0: 	{
sl@0: 	iUnitsMask=0x1;
sl@0: 	iVersion=TVersion(KMediaDriverInterfaceMajorVersion,KMediaDriverInterfaceMinorVersion,KMediaDriverInterfaceBuildVersion);
sl@0: 	}
sl@0: 
sl@0: TInt DPhysicalDeviceMediaIRam::Install()
sl@0: //
sl@0: // Install the Internal Ram Media PDD.
sl@0: //
sl@0: 	{
sl@0: 
sl@0: 	return SetName(&KPddName);
sl@0: 	}
sl@0: 
sl@0: void DPhysicalDeviceMediaIRam::GetCaps(TDes8& /*aDes*/) const
sl@0: //
sl@0: // Return the media drivers capabilities.
sl@0: //
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: TInt DPhysicalDeviceMediaIRam::Create(DBase*& aChannel, TInt aMediaId, const TDesC8* /* anInfo */,const TVersion &aVer)
sl@0: //
sl@0: // Create an Internal Ram media driver.
sl@0: //
sl@0: 	{
sl@0: 	if (!Kern::QueryVersionSupported(iVersion,aVer))
sl@0: 		return KErrNotSupported;
sl@0: 	TInt r=KErrNoMemory;
sl@0: 	DMediaDriverIRam* pD=new DMediaDriverIRam(aMediaId);
sl@0: 	aChannel=pD;
sl@0: 	if (pD)
sl@0: 		r=pD->DoCreate(aMediaId);
sl@0: 	TInternalRamDrive::Unlock();
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: TInt DPhysicalDeviceMediaIRam::Validate(TInt aDeviceType, const TDesC8* /*anInfo*/, const TVersion& aVer)
sl@0: 	{
sl@0: 	if (!Kern::QueryVersionSupported(iVersion,aVer))
sl@0: 		return KErrNotSupported;
sl@0: 	if (aDeviceType!=MEDIA_DEVICE_IRAM)
sl@0: 		return KErrNotSupported;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: TInt DPhysicalDeviceMediaIRam::Info(TInt aFunction, TAny*)
sl@0: //
sl@0: // Return the priority of this media driver
sl@0: //
sl@0: 	{
sl@0: 	if (aFunction==EPriority)
sl@0: 		return KMediaDriverPriorityNormal;
sl@0: 	return KErrNotSupported;
sl@0: 	}
sl@0: 
sl@0: DMediaDriverIRam::DMediaDriverIRam(TInt aMediaId)
sl@0: //
sl@0: // Constructor.
sl@0: //
sl@0: 	:	DMediaDriver(aMediaId)
sl@0: 	{}
sl@0: 
sl@0: TInt DMediaDriverIRam::DoCreate(TInt /*aMediaId*/)
sl@0: //
sl@0: // Create the media driver.
sl@0: //
sl@0: 	{
sl@0: 	
sl@0: 	TInt size=TInternalRamDrive::Size();
sl@0: 	if (size<0)
sl@0: 		return KErrGeneral;		// no RAM drive!
sl@0: 	SetTotalSizeInBytes(size);
sl@0: 	return(KErrNone);
sl@0: 	}
sl@0: 
sl@0: TInt DMediaDriverIRam::Request(TLocDrvRequest& m)
sl@0: 	{
sl@0: 	TInt request=m.Id();
sl@0: 	__KTRACE_OPT(KLOCDRV,Kern::Printf(">DMediaDriverIRam::Request %d",request));
sl@0: 	TInt r=KErrNotSupported;
sl@0: 	NKern::ThreadEnterCS();
sl@0: 	TInternalRamDrive::Wait();
sl@0: 	switch (request)
sl@0: 		{
sl@0: 		case DLocalDrive::ECaps:
sl@0: 			r=Caps(m);
sl@0: 			break;
sl@0: 		case DLocalDrive::ERead:
sl@0: 			r=Read(m);
sl@0: 			break;
sl@0: 		case DLocalDrive::EWrite:
sl@0: 			r=Write(m);
sl@0: 			break;
sl@0: 		case DLocalDrive::EFormat:
sl@0: 			r=Format(m);
sl@0: 			break;
sl@0: 		case DLocalDrive::EEnlarge:
sl@0: 			r=Enlarge(m);
sl@0: 			break;
sl@0: 		case DLocalDrive::EReduce:
sl@0: 			r=Reduce(m);
sl@0: 			break;
sl@0: 		default:
sl@0: 			r=KErrNotSupported;
sl@0: 			break;
sl@0: 		}
sl@0: 	TInternalRamDrive::Signal();
sl@0: 	NKern::ThreadLeaveCS();
sl@0: 	__KTRACE_OPT(KLOCDRV,Kern::Printf("<DMediaDriverIRam::Request %d",r));
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: void DMediaDriverIRam::Disconnect(DLocalDrive* /*aLocalDrive*/, TThreadMessage*)
sl@0: 	{
sl@0: 	// no action required
sl@0: 	}
sl@0: 
sl@0: void DMediaDriverIRam::NotifyPowerDown()
sl@0: 	{
sl@0: 	// no action required
sl@0: 	}
sl@0: 
sl@0: void DMediaDriverIRam::NotifyEmergencyPowerDown()
sl@0: 	{
sl@0: 	// no action required
sl@0: 	}
sl@0: 
sl@0: TInt DMediaDriverIRam::Caps(TLocDrvRequest& m)
sl@0: 	{
sl@0: 	TLocalDriveCapsV6& caps=*(TLocalDriveCapsV6*)m.RemoteDes();
sl@0: 	caps.iType=EMediaRam;
sl@0: 	caps.iConnectionBusType=EConnectionBusInternal;
sl@0: 	caps.iDriveAtt=KDriveAttLocal|KDriveAttInternal;
sl@0: 	caps.iMediaAtt=KMediaAttVariableSize|KMediaAttFormattable;
sl@0:     caps.iBaseAddress=(TUint8*)TInternalRamDrive::Base();
sl@0: 	caps.iFileSystemId=KDriveFileSysFAT;
sl@0: 	caps.iPartitionType=KPartitionTypeFAT16;
sl@0: 	caps.iSize=m.Drive()->iPartitionLen;
sl@0: 	caps.iHiddenSectors=0;
sl@0: 	caps.iEraseBlockSize=TInternalRamDrive::MaxSize();	// overload for RAM drive to avoid
sl@0: 														// F32 depending on memory model
sl@0: 	caps.iBlockSize=1;
sl@0: 	return KErrNone;									
sl@0: 	}
sl@0: 
sl@0: TInt DMediaDriverIRam::Read(TLocDrvRequest& m)
sl@0: 	{
sl@0: 	Int64 pos=m.Pos();
sl@0: 	Int64 length=m.Length();
sl@0: 	if (length<0 || pos<0 || (pos+length)>KMaxTInt)
sl@0: 		return KErrGeneral;
sl@0: 	TInt p=(TInt)pos;
sl@0: 	TInt l=(TInt)length;
sl@0: 	if (p+l>TInternalRamDrive::Size())
sl@0: 		return KErrGeneral;
sl@0: 	TPtrC8 des((TUint8*)TInternalRamDrive::Base()+p,l);
sl@0: 	TInt r=m.WriteRemote(&des,0);
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: TInt DMediaDriverIRam::Write(TLocDrvRequest& m)
sl@0: 	{
sl@0: 	Int64 pos=m.Pos();
sl@0: 	Int64 length=m.Length();
sl@0: 	if (length<0 || pos<0 || (pos+length)>KMaxTInt)
sl@0: 		return KErrGeneral;
sl@0: 	TInt p=(TInt)pos;
sl@0: 	TInt l=(TInt)length;
sl@0: 	if (p+l>TInternalRamDrive::Size())
sl@0: 		return KErrGeneral;
sl@0: 	TPtr8 des((TUint8*)TInternalRamDrive::Base()+p,l,l);
sl@0: 	TInt r=m.ReadRemote(&des,0);
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: TInt DMediaDriverIRam::Format(TLocDrvRequest& m)
sl@0: 	{
sl@0: 	Int64 pos=m.Pos();
sl@0: 	Int64 length=m.Length();
sl@0: 	if (length<0 || pos<0 || (pos+length)>KMaxTInt)
sl@0: 		return KErrGeneral;
sl@0: 	TInt p=(TInt)pos;
sl@0: 	TInt l=(TInt)length;
sl@0: 	if (p+l>TInternalRamDrive::Size())
sl@0: 		return KErrGeneral;
sl@0: 	memclr((TUint8*)TInternalRamDrive::Base()+p, l);
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: TInt DMediaDriverIRam::Enlarge(TLocDrvRequest& m)
sl@0: //
sl@0: // Enlarge the drive
sl@0: //
sl@0: 	{
sl@0: 	TInt length=(TInt)m.Length();
sl@0: 	__KTRACE_OPT(KLOCDRV,Kern::Printf(">IRam::Enlarge (%d)",length));
sl@0:  
sl@0: 	Int64 newLen=TotalSizeInBytes();
sl@0: 	newLen+=length;
sl@0: 	if (newLen>KMaxTInt)
sl@0: 		return(KErrGeneral);
sl@0: 
sl@0: 	TInt r=TInternalRamDrive::Adjust((TInt)newLen);
sl@0: 	if (r==KErrNone)
sl@0: 		{
sl@0: 		SetTotalSizeInBytes(newLen,m.Drive());
sl@0: 		__KTRACE_OPT(KLOCDRV,Kern::Printf("Enlarge-Success (S:0x%lx RS:%d)",TotalSizeInBytes(),TInternalRamDrive::Size()));
sl@0: 		}
sl@0: 	else if (r==KErrNoMemory)
sl@0: 		r=KErrDiskFull;
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: TInt DMediaDriverIRam::Reduce(TLocDrvRequest& m)
sl@0: //
sl@0: // Reduce in size the drive
sl@0: //
sl@0: 	{
sl@0: 	Int64 pos=m.Pos();
sl@0: 	TInt length=(TInt)m.Length();
sl@0: 	if (pos>KMaxTInt)
sl@0: 		return(KErrGeneral);
sl@0: 
sl@0: 	__KTRACE_OPT(KLOCDRV,Kern::Printf(">IRam::ReduceSize (%d@%d)",length,(TInt)pos));
sl@0: 
sl@0: 	TUint8 *Trg=(TUint8*)TInternalRamDrive::Base()+(TInt)pos;
sl@0: 	TInt len=TInternalRamDrive::Size()-((TInt)pos+length);
sl@0: 	memmove((TAny*)Trg,(TAny*)(Trg+length),len);
sl@0: 	len=TInternalRamDrive::Size()-length;
sl@0: 	TInt r=TInternalRamDrive::Adjust(len);
sl@0: 	if (r==KErrNone)
sl@0: 		{
sl@0: 		SetTotalSizeInBytes(len,m.Drive());
sl@0: 		__KTRACE_OPT(KLOCDRV,Kern::Printf("ReduceSize-Success (S:0x%lx RS:%d)",TotalSizeInBytes(),TInternalRamDrive::Size()));
sl@0: 		}
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: TInt DMediaDriverIRam::PartitionInfo(TPartitionInfo& anInfo)
sl@0: //
sl@0: // Return partition information on the media.
sl@0: //
sl@0: 	{
sl@0: 	
sl@0: 	anInfo.iPartitionCount=1;
sl@0: 	anInfo.iEntry[0].iPartitionBaseAddr=0;
sl@0: 	anInfo.iEntry[0].iPartitionLen=anInfo.iMediaSizeInBytes=TotalSizeInBytes();
sl@0: 	anInfo.iEntry[0].iPartitionType=KPartitionTypeFAT16;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: DECLARE_EXTENSION_PDD()
sl@0: 	{
sl@0: 	return new DPhysicalDeviceMediaIRam;
sl@0: 	}
sl@0: 
sl@0: static const TInt IRamDriveNumbers[IRAM_DRIVECOUNT]={IRAM_DRIVELIST};	
sl@0: _LIT(KIRamDriveName,IRAM_DRIVENAME);
sl@0: 
sl@0: DECLARE_STANDARD_EXTENSION()
sl@0: 	{
sl@0: 	__KTRACE_OPT(KBOOT,Kern::Printf("Registering IRAM drive"));
sl@0: 	TInt r=KErrNoMemory;
sl@0: 	DPrimaryMediaBase* pM=new DPrimaryMediaBase;
sl@0: 	if (pM)
sl@0: 		{
sl@0: 		r=LocDrv::RegisterMediaDevice(MEDIA_DEVICE_IRAM,IRAM_DRIVECOUNT,&IRamDriveNumbers[0],pM,IRAM_NUMMEDIA,KIRamDriveName);
sl@0: 		}
sl@0: 	__KTRACE_OPT(KBOOT,Kern::Printf("Registering IRAM drive - return %d",r));
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: