sl@0: // Copyright (c) 2002-2009 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: //
sl@0: 
sl@0: #include <kernel/kernel.h>
sl@0: #include <upd35001_timer.h>
sl@0: 
sl@0: #include "k32bm.h"
sl@0: 
sl@0: class DBMNE1Device : public DPhysicalDevice
sl@0: 	{
sl@0: public:
sl@0: 	DBMNE1Device();
sl@0: 	virtual TInt Install();
sl@0: 	virtual void GetCaps(TDes8& aDes) const;
sl@0: 	virtual TInt Create(DBase*& aChannel, TInt aUnit, const TDesC8* anInfo, const TVersion& aVer);
sl@0: 	virtual TInt Validate(TInt aUnit, const TDesC8* anInfo, const TVersion& aVer);
sl@0: 	};
sl@0: 
sl@0: class DBMNE1Channel : public DBMPChannel
sl@0: 	{
sl@0: public:
sl@0: 	DBMNE1Channel();
sl@0: 	~DBMNE1Channel();
sl@0: 	virtual TBMTicks TimerPeriod();
sl@0: 	virtual TBMTicks TimerStamp();
sl@0: 	virtual TBMNs TimerTicksToNs(TBMTicks);
sl@0: 	virtual TBMTicks TimerNsToTicks(TBMNs);
sl@0: 	virtual TInt BindInterrupt(MBMIsr*);
sl@0: 	virtual TInt BindInterrupt(MBMInterruptLatencyIsr*);
sl@0: 	virtual void RequestInterrupt();
sl@0: 	virtual void CancelInterrupt();
sl@0: 
sl@0: private:
sl@0: 	static const TBMTicks	KBMNE1Period = (((TBMTicks) 1) << 32);
sl@0: 	
sl@0: 	static void Isr(TAny*);
sl@0: 	
sl@0: 	MBMIsr*						iIsr;
sl@0: 	MBMInterruptLatencyIsr*		iInterruptLatencyIsr;
sl@0: 	TUint						iPrescale;
sl@0: 	TUint						iNsPerTick;
sl@0: 	NTimer						iTimer;
sl@0: 	volatile TUint				iStartCount;
sl@0: 	volatile TUint				iRunCount;
sl@0: 	volatile TUint				iCancelCount;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: DECLARE_STANDARD_PDD()
sl@0: //
sl@0: // Create a new device
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_CRITICAL;
sl@0: 	return new DBMNE1Device;
sl@0: 	}
sl@0: 
sl@0: DBMNE1Device::DBMNE1Device()
sl@0: //
sl@0: // Constructor
sl@0: //
sl@0: 	{
sl@0: 	//iUnitsMask=0;
sl@0: 	iVersion = TVersion(1,0,1);
sl@0: 	}
sl@0: 
sl@0: TInt DBMNE1Device::Install()
sl@0: //
sl@0: // Install the device driver.
sl@0: //
sl@0: 	{
sl@0: 	TInt r = SetName(&KBMPdName);
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: void DBMNE1Device::GetCaps(TDes8& aDes) const
sl@0: //
sl@0: // Return the Comm capabilities.
sl@0: //
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: TInt DBMNE1Device::Create(DBase*& aChannel, TInt /*aUnit*/, const TDesC8* /*aInfo*/, const TVersion& /*aVer*/)
sl@0: //
sl@0: // Create a channel on the device.
sl@0: //
sl@0: 	{
sl@0: 	__ASSERT_CRITICAL;
sl@0: 	aChannel = new DBMNE1Channel;
sl@0: 	return aChannel?KErrNone:KErrNoMemory;
sl@0: 	}
sl@0: 
sl@0: TInt DBMNE1Device::Validate(TInt /*aUnit*/, const TDesC8* /*anInfo*/, const TVersion& aVer)
sl@0: 	{
sl@0: 	if (!Kern::QueryVersionSupported(iVersion,aVer))
sl@0: 		{
sl@0: 		return KErrNotSupported;
sl@0: 		}
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: DBMNE1Channel::DBMNE1Channel()
sl@0: 	:	iTimer(&Isr, this)
sl@0: 	{
sl@0: 	//	iIsr = NULL;
sl@0: 	//	iInterruptLatencyIsr = NULL;
sl@0: 	NETimer& T2 = NETimer::Timer(2);
sl@0: 	iPrescale = __e32_find_ms1_32(T2.iPrescaler & 0x3f);
sl@0: 	iNsPerTick = 15u << iPrescale;
sl@0: 	}
sl@0: 
sl@0: DBMNE1Channel::~DBMNE1Channel()
sl@0: 	{
sl@0: 	CancelInterrupt();
sl@0: 	}
sl@0: 
sl@0: TBMTicks DBMNE1Channel::TimerPeriod()
sl@0: 	{
sl@0: 	return KBMNE1Period;
sl@0: 	}
sl@0: 
sl@0: TBMTicks DBMNE1Channel::TimerStamp()
sl@0: 	{
sl@0: 	return NETimer::Timer(2).iTimerCount;
sl@0: 	}
sl@0: 
sl@0: TBMNs DBMNE1Channel::TimerTicksToNs(TBMTicks ticks)
sl@0: 	{
sl@0: 	return ticks * (TBMTicks)iNsPerTick;
sl@0: 	}
sl@0: 
sl@0: TBMTicks DBMNE1Channel::TimerNsToTicks(TBMNs ns)
sl@0: 	{
sl@0: 	return ns / (TBMTicks)iNsPerTick;
sl@0: 	}
sl@0: 
sl@0: void DBMNE1Channel::Isr(TAny* ptr)
sl@0: 	{
sl@0: 	DBMNE1Channel* mCh = (DBMNE1Channel*) ptr;
sl@0: 	BM_ASSERT(mCh->iIsr || mCh->iInterruptLatencyIsr);
sl@0: 	if (mCh->iIsr)
sl@0: 		{
sl@0: 		mCh->iIsr->Isr(NETimer::Timer(2).iTimerCount);
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		TUint x = NETimer::Timer(0).iTimerCount;
sl@0: 		x = (x + (1u<<mCh->iPrescale) - 1) >> mCh->iPrescale;
sl@0: 		mCh->iInterruptLatencyIsr->InterruptLatencyIsr(x);
sl@0: 		}
sl@0: 	__e32_atomic_add_ord32(&mCh->iRunCount, 1);
sl@0: 	}
sl@0: 
sl@0: TInt DBMNE1Channel::BindInterrupt(MBMIsr* aIsr)
sl@0: 	{
sl@0: 	BM_ASSERT(!iIsr);
sl@0: 	BM_ASSERT(!iInterruptLatencyIsr);
sl@0: 	iIsr = aIsr;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: TInt DBMNE1Channel::BindInterrupt(MBMInterruptLatencyIsr* aIsr)
sl@0: 	{
sl@0: 	BM_ASSERT(!iIsr);
sl@0: 	BM_ASSERT(!iInterruptLatencyIsr);
sl@0: 	iInterruptLatencyIsr = aIsr;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DBMNE1Channel::RequestInterrupt()
sl@0: 	{
sl@0: 	BM_ASSERT(iIsr || iInterruptLatencyIsr);
sl@0: 	if (iTimer.OneShot(1)==KErrNone)
sl@0: 		__e32_atomic_add_ord32(&iStartCount, 1);
sl@0: 	}
sl@0: 
sl@0: void DBMNE1Channel::CancelInterrupt()
sl@0: 	{
sl@0: 	if (iTimer.Cancel())
sl@0: 		__e32_atomic_add_ord32(&iCancelCount, 1);
sl@0: 	while (iStartCount != iCancelCount + iRunCount)
sl@0: 		{}
sl@0: 	}
sl@0: