/*

* Copyright (c) 2007-2009 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: 

*

*/

/**

 @file

 @internalComponent

 @released

*/

#ifndef __CRYPTOH4RNG__

#define __CRYPTOH4RNG__

#include "cryptojobs.h"

class DCryptoH4Chan;

class DLddChanRandom;

class CryptoH4JobRandom : public CryptoJobRandom

	{

public:

	CryptoH4JobRandom(DLddChanRandom &aLddChanRandom);

	virtual ~CryptoH4JobRandom();

	virtual void SetDfcQ(TDfcQue *aDfcQue);

	virtual void SetDetails(DCryptoJobScheduler *aJobScheduler, MCryptoJobCallbacks *aCallbacks,

							TUint32 aNumOfBytes);

	virtual void GetToPddBuffer(TUint8 * &aBuf, TUint32 &aBufLen, TBool &aMore);

	virtual void BytesWrittenToPdd(TUint32 aBytes);

	virtual void GetFromPddBuffer(TUint8 * &aBuf, TUint32 &aBufLen, TBool &aMore);

	virtual void BytesReadFromPdd(TUint32 aBytes);

private:	

	// Implementations of virtual base class methods to support DCryptoJobScheduler

	virtual void DoSlice(TBool aFirstSlice);

	virtual TBool DoSaveState();

	virtual void DoRestoreState();

	virtual void DoReleaseHw();

	TInt BytesAvailable() const;

	void RegionsAvailable(TUint8 * &aPtr1, TInt &aLen1, 

						  TUint8 * &aPtr2, TInt &aLen2) const;

	DLddChanRandom &iLddChanRandom;

	// Details of job

	TUint32 iRandomBuffer[64]; // Temporary buffer for PDD to write into

	TInt iJobSizeInBytes;

	TInt iSwReadByteOffset;

	TInt iHw32Index;

	// Hook/enable unhook/disable ISR in top level OMAP h/w

	// Done at job scheduling level

	TBool iIsrHooked;

	void HookIsr();

	void UnHookIsr();

	// Enable/disable RNG ISR in Mask register

	// Done for each byte of data.

	inline void EnableIsr();

	inline void DisableIsr();

	static void Isr(TAny *aPtr);

    static void RandomDfc(TAny* aPtr);

	void DoRandomDfc();

    TDfc iRandomDfc;	

	};

#endif