// Copyright (c) 2002-2009 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:

 //

 #include <kernel/kernel.h>

 #include <upd35001_timer.h>

 #include "k32bm.h"

 class DBMNE1Device : public DPhysicalDevice

 	{

 public:

 	DBMNE1Device();

 	virtual TInt Install();

 	virtual void GetCaps(TDes8& aDes) const;

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

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

 	};

 class DBMNE1Channel : public DBMPChannel

 	{

 public:

 	DBMNE1Channel();

 	~DBMNE1Channel();

 	virtual TBMTicks TimerPeriod();

 	virtual TBMTicks TimerStamp();

 	virtual TBMNs TimerTicksToNs(TBMTicks);

 	virtual TBMTicks TimerNsToTicks(TBMNs);

 	virtual TInt BindInterrupt(MBMIsr*);

 	virtual TInt BindInterrupt(MBMInterruptLatencyIsr*);

 	virtual void RequestInterrupt();

 	virtual void CancelInterrupt();

 private:

 	static const TBMTicks	KBMNE1Period = (((TBMTicks) 1) << 32);

 	static void Isr(TAny*);

 	MBMIsr*						iIsr;

 	MBMInterruptLatencyIsr*		iInterruptLatencyIsr;

 	TUint						iPrescale;

 	TUint						iNsPerTick;

 	NTimer						iTimer;

 	volatile TUint				iStartCount;

 	volatile TUint				iRunCount;

 	volatile TUint				iCancelCount;

 	};

 DECLARE_STANDARD_PDD()

 //

 // Create a new device

 //

 	{

 	__ASSERT_CRITICAL;

 	return new DBMNE1Device;

 	}

 DBMNE1Device::DBMNE1Device()

 //

 // Constructor

 //

 	{

 	//iUnitsMask=0;

 	iVersion = TVersion(1,0,1);

 	}

 TInt DBMNE1Device::Install()

 //

 // Install the device driver.

 //

 	{

 	TInt r = SetName(&KBMPdName);

 	return r;

 	}

 void DBMNE1Device::GetCaps(TDes8& aDes) const

 //

 // Return the Comm capabilities.

 //

 	{

 	}

 TInt DBMNE1Device::Create(DBase*& aChannel, TInt /*aUnit*/, const TDesC8* /*aInfo*/, const TVersion& /*aVer*/)

 //

 // Create a channel on the device.

 //

 	{

 	__ASSERT_CRITICAL;

 	aChannel = new DBMNE1Channel;

 	return aChannel?KErrNone:KErrNoMemory;

 	}

 TInt DBMNE1Device::Validate(TInt /*aUnit*/, const TDesC8* /*anInfo*/, const TVersion& aVer)

 	{

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

 		{

 		return KErrNotSupported;

 		}

 	return KErrNone;

 	}

 DBMNE1Channel::DBMNE1Channel()

 	:	iTimer(&Isr, this)

 	{

 	//	iIsr = NULL;

 	//	iInterruptLatencyIsr = NULL;

 	NETimer& T2 = NETimer::Timer(2);

 	iPrescale = __e32_find_ms1_32(T2.iPrescaler & 0x3f);

 	iNsPerTick = 15u << iPrescale;

 	}

 DBMNE1Channel::~DBMNE1Channel()

 	{

 	CancelInterrupt();

 	}

 TBMTicks DBMNE1Channel::TimerPeriod()

 	{

 	return KBMNE1Period;

 	}

 TBMTicks DBMNE1Channel::TimerStamp()

 	{

 	return NETimer::Timer(2).iTimerCount;

 	}

 TBMNs DBMNE1Channel::TimerTicksToNs(TBMTicks ticks)

 	{

 	return ticks * (TBMTicks)iNsPerTick;

 	}

 TBMTicks DBMNE1Channel::TimerNsToTicks(TBMNs ns)

 	{

 	return ns / (TBMTicks)iNsPerTick;

 	}

 void DBMNE1Channel::Isr(TAny* ptr)

 	{

 	DBMNE1Channel* mCh = (DBMNE1Channel*) ptr;

 	BM_ASSERT(mCh->iIsr || mCh->iInterruptLatencyIsr);

 	if (mCh->iIsr)

 		{

 		mCh->iIsr->Isr(NETimer::Timer(2).iTimerCount);

 		}

 	else

 		{

 		TUint x = NETimer::Timer(0).iTimerCount;

 		x = (x + (1u<<mCh->iPrescale) - 1) >> mCh->iPrescale;

 		mCh->iInterruptLatencyIsr->InterruptLatencyIsr(x);

 		}

 	__e32_atomic_add_ord32(&mCh->iRunCount, 1);

 	}

 TInt DBMNE1Channel::BindInterrupt(MBMIsr* aIsr)

 	{

 	BM_ASSERT(!iIsr);

 	BM_ASSERT(!iInterruptLatencyIsr);

 	iIsr = aIsr;

 	return KErrNone;

 	}

 TInt DBMNE1Channel::BindInterrupt(MBMInterruptLatencyIsr* aIsr)

 	{

 	BM_ASSERT(!iIsr);

 	BM_ASSERT(!iInterruptLatencyIsr);

 	iInterruptLatencyIsr = aIsr;

 	return KErrNone;

 	}

 void DBMNE1Channel::RequestInterrupt()

 	{

 	BM_ASSERT(iIsr || iInterruptLatencyIsr);

 	if (iTimer.OneShot(1)==KErrNone)

 		__e32_atomic_add_ord32(&iStartCount, 1);

 	}

 void DBMNE1Channel::CancelInterrupt()

 	{

 	if (iTimer.Cancel())

 		__e32_atomic_add_ord32(&iCancelCount, 1);

 	while (iStartCount != iCancelCount + iRunCount)

 		{}

 	}