// Copyright (c) 2008-2009 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:

// omap3530/beagle_drivers/serialmouse/serialmouse.cpp

// Serial mouse driver

//

/**

 @file

 @internalTechnology

*/

#include <e32keys.h>

#include <arm.h>

#include <comm.h>

#include <assp.h>

#include <assp/omap3530_assp/omap3530_uart.h>

//#include <assp/omap3530_assp/omap3530_prm.h>

#include <assp/omap3530_assp/omap3530_prcm.h>

//#include <resourceman.h>

#include "serialmouse.h"

_LIT( KName, "SERMOUSE" );

#ifdef _FRAME_BUFFER_CURSOR_

#	define CURSOR_SIZE 5

#endif

LOCAL_C TInt halFunction(TAny* aPtr, TInt aFunction, TAny* a1, TAny* a2)

	{

	TSerialMouse* pH=(TSerialMouse*)aPtr;

	return pH->HalFunction(aFunction,a1,a2);

	}

TSerialMouse::TSerialMouse()

				: iKeyDfc( KeyDfcFn, this, Kern::DfcQue0(), 1 ), iState(ENormal),

				iUart( Omap3530Uart::EUart2 )

	{

	Kern::Printf("+TSerialMouse::TSerialMouse");

#	ifdef _FRAME_BUFFER_CURSOR_

	iCursorBuffer = new TUint16[CURSOR_SIZE*CURSOR_SIZE];

#	endif

	}

TSerialMouse::~TSerialMouse()

	{

#	ifdef _FRAME_BUFFER_CURSOR_

	delete[] iCursorBuffer;

#	endif

	}

TInt TSerialMouse::Create()

	{

	GetScreenInfo();

	TInt r=Kern::AddHalEntry(EHalGroupMouse, halFunction, this);

	if (r!=KErrNone)

		return r;

	__KTRACE_OPT(KBOOT,Kern::Printf("+TSerialMouse::Init")) ;

	iDebugPort = Kern::SuperPage().iDebugPort; // Get the debug port number

	if( Arm::EDebugPortJTAG == iDebugPort )

		{

		__KTRACE_OPT(KBOOT,Kern::Printf("-TSerialMouse::Init: JTAG not supported"));

		// We don't want to return an error here, just don't bother to initialize

		return KErrNone;

		}

	else if( 2 != iDebugPort )

		{

		__KTRACE_OPT(KBOOT,Kern::Printf("-TSerialMouse::Init: Only UART3 supported"));

		// We don't want to return an error here, just don't bother to initialize

		return KErrNone;

		}

	// Register with the power resource manager

	//r = PowerResourceManager::RegisterClient( iPrmClientId, KName );

	//if( r != KErrNone )

	//	{

	//	return r;

	//	}

	//__KTRACE_OPT(KBOOT,Kern::Printf("+TSerialMouse::Init:PRM client ID=%x", iPrmClientId )) ;

 	r =Interrupt::Bind( iUart.InterruptId(),Isr,this);

	if ( r < 0 )

 		{

		Kern::Printf("TSerialMouse::Create Cant Bind to Interrupt %d ret %d",iUart.InterruptId(), r );

		return r;

 		}

	// Ask power resource manager to turn on clocks to the UART

	// (this could take some time but we're not in any hurry)

	//r = PowerResourceManager::ChangeResourceState( iPrmClientId, iUart.PrmFunctionClk(), Prcm::EClkAuto );

	//if( KErrNone != r )

	//	{

	//	return r;

	//	}

	//r = PowerResourceManager::ChangeResourceState( iPrmClientId, iUart.PrmInterfaceClk(), Prcm::EClkAuto );

	//if( KErrNone != r )

	//	{

	//	return r;

	//	}

	iUart.Init();

	iUart.DefineMode( Omap3530Uart::TUart::EUart );

	iUart.SetBaud( Omap3530Uart::TUart::E1200 );

	iUart.SetDataFormat( Omap3530Uart::TUart::E7Data, Omap3530Uart::TUart::E1Stop, Omap3530Uart::TUart::ENone );

	iUart.EnableFifo( Omap3530Uart::TUart::EEnabled, Omap3530Uart::TUart::ETriggerUnchanged, Omap3530Uart::TUart::ETrigger8 );

	iUart.EnableInterrupt( Omap3530Uart::TUart::EIntRhr );

	iUart.Enable();

	Interrupt::Enable(iUart.InterruptId());

	return KErrNone;

	}

void TSerialMouse::Isr( TAny* aPtr )

	//

	// Interrupt service routine. Called when we receive an interrupt

	// on the IRQ line it is bound to. If it's a receive, queues DFC

	// to post the event into the event queue.

	//

	{

	TSerialMouse* self = (TSerialMouse*)aPtr;

	const TUint iir = Omap3530Uart::IIR::iMem.Read( self->iUart );

	if ( 0 == (iir bitand Omap3530Uart::IIR::IT_PENDING::KMask) )

		{

		const TUint pending = iir bitand Omap3530Uart::IIR::IT_TYPE::KFieldMask;

		// Although the TI datasheet descrivwed IT_TYPE as being an enumerated priority-decoded interrupt

		// it appears to actually be a bitmask of active interrupt sources

		if ( (pending bitand Omap3530Uart::IIR::IT_TYPE::ERHR) || (pending bitand Omap3530Uart::IIR::IT_TYPE::ERxLineStatus) )

			{

			TUint byte = self->iUart.Read();

			self->iKey = byte;

			self->iKeyDfc.Add();

			Interrupt::Disable( self->iUart.InterruptId() );

			}

		}

	}

void TSerialMouse::KeyDfcFn( TAny* aPtr )

	//

	// DFC function. Just calls inline function KeyDfc()

	//

	{

	((TSerialMouse*)aPtr)->KeyDfc();

	}

inline void TSerialMouse::KeyDfc()

	//

	// Processes received characters

	//

	{	

	const TUint8 b = iKey;

	if ( b & 1<<6 )

		{

		// Beginning of a new frame

		iByteIndex = 0;

		iB0 = b;

		}

	else if ( iByteIndex == 0 )

		{

		iByteIndex = 1;

		iB1 = b;

		}

	else if ( iByteIndex == 1 )

		{

		iByteIndex = -1;

		iB2 = b;

		const TInt8 x_increment = (iB0 & 0x3)<<6 | (iB1 & 0x3f);

		const TInt8 y_increment = (iB0 & 0xC)<<4 | (iB2 & 0x3f);

		const TBool isLeftButtonDown	= iB0& 1<<5;

		const TBool isRightButtonDown	= iB0& 1<<4;

#		ifdef _FRAME_BUFFER_CURSOR_

		iLastX = iX;

		iLastY = iY;

#		endif

		iX += x_increment; //Scale ( x_increment );

		iY += y_increment; //Scale ( y_increment );

		Clip( iX, iY );

		//DBG_PRINT4(_L("\nx:%d y:%d (%d,%d)"), x_increment, y_increment, iX, iY );

		TBool rightButtonEvent = (isRightButtonDown != iLastRightButtonDown);

		TBool leftButtonEvent = (isLeftButtonDown != iLastLeftButtonDown);

		iLastLeftButtonDown	= isLeftButtonDown;

		iLastRightButtonDown	= isRightButtonDown;

		TRawEvent e;

		if ( rightButtonEvent )

			{

			e.Set( isRightButtonDown ? TRawEvent::EButton2Down : TRawEvent::EButton2Up, iX, iY );

			Kern::AddEvent(e);	

			//DBG_PRINT1(_L(" right:%S"), isRightButtonDown?&_L("down"):&_L("up") );

			}

		if ( leftButtonEvent )

			{

			e.Set( isLeftButtonDown ? TRawEvent::EButton1Down : TRawEvent::EButton1Up, iX, iY );

			Kern::AddEvent(e);

			//DBG_PRINT1(_L(" left:%S"), isLeftButtonDown?&_L("down"):&_L("up") );

			}

		if ( !rightButtonEvent && !leftButtonEvent )

			{

#			ifdef _TRACK_COORDINATES_

			// Reoprt the exact coordinate to the windowserver

			e.Set(TRawEvent::EPointerMove,iX,iY);

#			else

			// Report the change in coordinates to the windowserver

			e.Set(TRawEvent::EPointerMove,x_increment,y_increment);

#			endif

			Kern::AddEvent(e);

			}

#		ifdef _FRAME_BUFFER_CURSOR_

		DrawCursor(iX,iY);

#		endif

		}

	Interrupt::Enable(iUart.InterruptId()); // Can handle new chars now

	} /* end of function - KeyDfc - */

/*

Perform 2:1 scaling on a mosue movement.

*/

TInt TSerialMouse::Scale(const TInt& aVal)

	{

	switch (aVal)

		{

		case 0: return 0;

		case 1:

		case 2: return 1;

		case 3: return 3;

		case 4: return 6;

		case 5: return 9;

		case -1:

		case -2: return -1;

		case -3: return -3;

		case -4: return -6;

		case -5: return -9;

		default: return 2*aVal;

		}

	}

/*

Clip the mouse coordinates into the dimensions of the screen

*/

void TSerialMouse::Clip(TInt& aX, TInt& aY)

	{

	if ( aX < 0 )	aX = 0;

	if ( aX >= iScreenWidth )	aX = iScreenWidth - 1;

	if ( aY < 0 )	aY = 0;

	if ( aY >= iScreenHeight )	aY = iScreenHeight - 1;

	}

void TSerialMouse::GetScreenInfo()

	{

	TScreenInfoV01 screenInfo;

	TPckg<TScreenInfoV01> sI(screenInfo);

	Kern::HalFunction(EHalGroupDisplay,EDisplayHalScreenInfo,(TAny*)&sI,NULL);

	iScreenWidth = screenInfo.iScreenSize.iWidth;

	iScreenHeight = screenInfo.iScreenSize.iHeight;

#	ifdef _FRAME_BUFFER_CURSOR_

	iVideoAddress = (TUint8*)screenInfo.iScreenAddress;

#	endif

	}

#ifdef _FRAME_BUFFER_CURSOR_

void TSerialMouse::Blit(TInt x, TInt y, TUint16 aColour)

	{

	TUint16* fb = (TUint16*)iVideoAddress;

	fb += (iLastY * iScreenWidth) + iLastX;

	for (TInt i = 0; i<CURSOR_SIZE; ++i) //row

		{

		if ( (iLastY + i) >= iScreenHeight) break;

		for (TInt j = 0; j<CURSOR_SIZE; ++j) //column

			{

			if ((iLastX+j) < iScreenWidth)

				{

				*fb = iCursorBuffer[i*CURSOR_SIZE + j];

				}

			++fb;

			}

		fb += iScreenWidth - CURSOR_SIZE;

		}

	fb = (TUint16*)iVideoAddress;

	fb += (y * iScreenWidth) + x;

	for (TInt i = 0; i<CURSOR_SIZE; ++i) //row

		{

		if ( (y + i) >= iScreenHeight) break;

		for (TInt j = 0; j<CURSOR_SIZE; ++j) //column

			{

			if ((x+j) < iScreenWidth)

				{

				iCursorBuffer[i*CURSOR_SIZE + j] = *fb;

				*fb = aColour;

				}

			++fb;

			}

		fb += iScreenWidth - CURSOR_SIZE;

		}

	/*TUint8* fb = iVideoAddress;

	fb += ( (y * iScreenWidth) + x ) * 2;	

	TBuf8<256> cur;

	cur.FillZ();

	TUint8* cursor = &cur[0];

	for (TInt i = 0; i<cursorSize; ++i)

		{

		if ( (y + i) >= iScreenHeight) break;

		TInt bytes_to_copy = Min( cursorSize, iScreenWidth*2 - x*2 );

		Mem::Copy(fb, cursor, bytes_to_copy );

		cursor += cursorSize;

		}*/

	}

void TSerialMouse::DrawCursor(TInt x, TInt y)

	{	

	TUint16 cursorColour = iLastLeftButtonDown ? 0x1F : 0x00;

	Blit(x, y, cursorColour);

	}

#endif

TInt TSerialMouse::HalFunction(TInt aFunction, TAny* a1, TAny* /*a2*/)

	{

	TInt r=KErrNone;

	switch(aFunction)

		{

		case EMouseHalMouseInfo:

			{

			TPckgBuf<TMouseInfoV01> vPckg;

			TMouseInfoV01& xyinfo=vPckg();

			xyinfo.iMouseButtons=2;

			xyinfo.iMouseAreaSize.iWidth=iScreenWidth;

			xyinfo.iMouseAreaSize.iHeight=iScreenHeight;

			xyinfo.iOffsetToDisplay.iX=0;

			xyinfo.iOffsetToDisplay.iY=0;

			Kern::InfoCopy(*(TDes8*)a1,vPckg);

			break;

			}

		default:

			r=KErrNotSupported;

			break;

		}

	return r;

	}

void DoCreate( TAny* aParam )

	{

	TInt r = reinterpret_cast< TSerialMouse* >( aParam )->Create();

	__ASSERT_ALWAYS( r == KErrNone, Kern::Fault( "SERKEY-Cr", r ) );	

	}

//

// Kernel Extension entry point

//

DECLARE_STANDARD_EXTENSION()

	{

	__KTRACE_OPT(KBOOT,Kern::Printf("Starting mouse driver"));

	// create mouse driver

	TInt r=KErrNoMemory;

	TSerialMouse* mouse = new TSerialMouse;

	if ( mouse )

		{

		// Because the Power Resource Manager doesn't finish initializing until after it

		// has run a DFC on SvMsgQue, we need to defer our initialization until after that

		// so we know that the PRM is ready for us to use it

		static TDfc createDfc( &DoCreate, NULL );

		new( &createDfc ) TDfc( &DoCreate, mouse, Kern::SvMsgQue(), KMaxDfcPriority-2 );

		createDfc.Enque();

		r = KErrNone;

		}

	__KTRACE_OPT(KEXTENSION,Kern::Printf("Returns %d",r));

	return r;

	}