// Copyright (c) 1998-2009 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\misc\strataflash.cpp

 // 

 //

 #include <e32def.h>

 #include <e32def_private.h>

 #include "flash.h"

 class StrataFlash : public Flash

 	{

 public:

 	virtual TInt Read(TUint32 anAddr, TUint32 aSize, TUint8* aDest);

 	virtual TInt BlankCheck(TUint32 anAddr, TUint32 aSize);

 	virtual TInt Erase(TUint32 anAddr, TUint32 aSize);

 	virtual TInt Write(TUint32 anAddr, TUint32 aSize, const TUint8* aSrc);

 	};

 Flash* Flash::New(TUint32 /*anAddr*/)

 	{

 	return new StrataFlash;

 	}

 TInt StrataFlash::Read(TUint32 anAddr, TUint32 aSize, TUint8* aDest)

 	{

 	Mem::Copy(aDest,(const TUint8*)anAddr,aSize);

 	return KErrNone;

 	}

 TInt StrataFlash::BlankCheck(TUint32 anAddr, TUint32 aSize)

 	{

 	const TUint8* p=(const TUint8*)anAddr;

 	const TUint8* pE=p+aSize;

 	while(p<pE)

 		{

 		if (*p++!=0xff)

 			return (TUint32)p-anAddr;

 		}

 	return 0;

 	}

 TInt StrataFlash::Erase(TUint32 anAddr, TUint32 aSize)

 	{

 	TUint32 base=anAddr&~0x1ffff;	// round base address down to block

 	TUint32 end=anAddr+aSize;

 	end=(end+0x1ffff)&~0x1ffff;	// round end address up to block

 	TUint32 size=end-base;

 	for (; size; size-=0x20000, base+=0x20000)

 		{

 		volatile TUint8* p=(volatile TUint8*)base;

 		*p=0x20;		// block erase

 		*p=0xd0;		// block erase confirm

 		TUint s=0;

 		while ((s&0x80)==0)

 			s=*p;

 		*p=0x50;		// clear status reg

 		*p=0xff;		// read mode

 		if (s&0x20)

 			{

 			// error

 			return (TUint32)p-anAddr+1;

 			}

 		}

 	return 0;

 	}

 TInt StrataFlash::Write(TUint32 anAddr, TUint32 aSize, const TUint8* aSrc)

 	{

 	volatile TUint8* p=(volatile TUint8*)anAddr;

 	const TUint8* pE=aSrc+aSize;

 	for (; aSrc<pE; aSrc++, p++)

 		{

 		*p=0x40;		// byte write

 		*p=*aSrc;		// write data

 		TUint s=0;

 		while ((s&0x80)==0)

 			s=*p;

 		*p=0x50;		// clear status reg

 		*p=0xff;		// read mode

 		if (s&0x10)

 			{

 			// error

 			return (TUint32)p-anAddr+1;

 			}

 		}

 	return 0;

 	}