AppleADBMouse.cpp   [plain text]

/*
 * Copyright (c) 1998-2003 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * 18 June 1998 	  Start IOKit version.
 * 18 Nov  1998 suurballe port to C++
 *  4 Oct  1999 decesare  Revised for Type 4 support and sub-classed drivers.
 *  1 Feb  2000 tsherman  Added extended mouse functionality (implemented in setParamProperties)
 */

#include "AppleADBMouse.h"
#include <IOKit/hidsystem/IOHIDTypes.h>
#include <IOKit/hidsystem/IOHIDParameter.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOPlatformExpert.h>


//Need the following to compile with GCC3 
static inline int
my_abs(int x)
{
   return x < 0 ? -x : x;
}


static bool check_usb_mouse(OSObject *, void *, IOService * );

// ****************************************************************************
// NewMouseData
//
// ****************************************************************************
static void NewMouseData(IOService * target, UInt8 adbCommand, IOByteCount length, UInt8 * data)
{
  ((AppleADBMouse *)target)->packet(adbCommand, length, data);
}


// ****************************************************************************

#undef super
#define super IOHIPointing

OSDefineMetaClassAndStructors(AppleADBMouse, IOHIPointing);


// ****************************************************************************
// probe
//
// ****************************************************************************
IOService * AppleADBMouse::probe(IOService * provider, SInt32 * score)
{
//kprintf("ADB generic probe called\n");
  adbDevice = (IOADBDevice *)provider;
  return this;
}


// ****************************************************************************
// start
//
// ****************************************************************************
bool AppleADBMouse::start(IOService * provider)
{
//kprintf("ADB Mouse super is starting\n");
  if(!super::start(provider)) return false;
  
  if(!adbDevice->seizeForClient(this, NewMouseData)) {
    IOLog("%s: Seize failed\n", getName());
    return false;
  }
  return true;
}


// ****************************************************************************
// interfaceID
//
// ****************************************************************************
UInt32 AppleADBMouse::interfaceID(void)
{
  return NX_EVS_DEVICE_INTERFACE_ADB;
}


// ****************************************************************************
// deviceType
//
// ****************************************************************************
UInt32 AppleADBMouse::deviceType ( void )
{
  return adbDevice->handlerID();
}


// ****************************************************************************
// resolution
//
// ****************************************************************************
IOFixed AppleADBMouse::resolution(void)
{
  return _resolution;
}


// ****************************************************************************
// buttonCount
//
// ****************************************************************************
IOItemCount AppleADBMouse::buttonCount(void)
{
  return _buttonCount;
}


// ****************************************************************************
// packet
//
// ****************************************************************************
void AppleADBMouse::packet(UInt8 /*adbCommand*/,
			   IOByteCount /*length*/, UInt8 * data)
{
  int		  dx, dy;
  UInt32          buttonState = 0;
  AbsoluteTime    now;

  dy = data[0] & 0x7f;
  dx = data[1] & 0x7f;
  
  if (dy & 0x40) dy |= 0xffffffc0;
  if (dx & 0x40) dx |= 0xffffffc0;
  
  if ((data[0] & 0x80) == 0) buttonState |= 1;
  
  clock_get_uptime(&now);
  dispatchRelativePointerEvent(dx, dy, buttonState, now);
}


// ****************************************************************************

#undef super
#define super AppleADBMouse

OSDefineMetaClassAndStructors(AppleADBMouseType1, AppleADBMouse);

IOService * AppleADBMouseType1::probe(IOService * provider, SInt32 * score)
{
  if (!super::probe(provider, score)) return 0;
  
  return this;
}

bool AppleADBMouseType1::start(IOService * provider)
{
  OSNumber 	*dpi;

  if (adbDevice->setHandlerID(1) != kIOReturnSuccess) return false;
  
  dpi = OSDynamicCast( OSNumber, getProperty("dpi"));
  if (dpi)
  {
    _resolution = dpi->unsigned16BitValue() << 16;
  }
  else
  {
    _resolution = 100 << 16;
  }
  _buttonCount = 1;

  return super::start(provider);
}


// ****************************************************************************

#undef super
#define super AppleADBMouse

OSDefineMetaClassAndStructors(AppleADBMouseType2, AppleADBMouse);

IOService * AppleADBMouseType2::probe(IOService * provider, SInt32 * score)
{
  if (!super::probe(provider, score)) return 0;

  if (adbDevice->setHandlerID(2) != kIOReturnSuccess) return 0;
  return this;
}

bool AppleADBMouseType2::start(IOService * provider)
{
  OSNumber 	*dpi;
  
  if (adbDevice->setHandlerID(2) != kIOReturnSuccess) return false;
  
  dpi = OSDynamicCast( OSNumber, getProperty("dpi"));
  if (dpi)
  {
    _resolution = dpi->unsigned16BitValue() << 16;
  }
  else
  {
    _resolution = 200 << 16;
  }
  _buttonCount = 1;
  
  return super::start(provider);
}


// ****************************************************************************

#undef super
#define super AppleADBMouse

OSDefineMetaClassAndStructors(AppleADBMouseType4, AppleADBMouse);

IOService * AppleADBMouseType4::probe(IOService * provider, SInt32 * score)
{
  UInt8       data[8];
  IOByteCount length = 8;
  
  if (!super::probe(provider, score)) return 0;
  
  if (adbDevice->setHandlerID(4) != kIOReturnSuccess) {
    adbDevice->setHandlerID(adbDevice->defaultHandlerID());
    return 0;
  }
  
  // To be a Type 4 Extended Mouse, register 1 must return 8 bytes.
  if (adbDevice->readRegister(1, data, &length) != kIOReturnSuccess) return 0;
  if (length != 8) return 0;
  
  // Save the device's Extended Mouse Info.
  deviceSignature  = ((UInt32 *)data)[0];
  deviceResolution = ((UInt16 *)data)[2];
  deviceClass      = data[6];
  deviceNumButtons = data[7];
  
  return this;
}

bool AppleADBMouseType4::start(IOService * provider)
{
  UInt8       adbdata[8];
  IOByteCount adblength = 8;
  OSNumber 	*dpi;

  typeTrackpad = FALSE;

  if (adbDevice->setHandlerID(4) != kIOReturnSuccess) return false;

  dpi = OSDynamicCast( OSNumber, getProperty("dpi"));
  if (dpi)
  {
    _resolution = dpi->unsigned16BitValue() << 16;
  }
  else
  {
    _resolution = deviceResolution << 16;
  }

  _buttonCount = deviceNumButtons;
  _notifierA = _notifierT = NULL;  //Only used by trackpad, but inspected by all type 4 mice
  _gettime = OSSymbol::withCString("get_last_keydown");
  _mouseLock = IOLockAlloc(); 

  adbDevice->readRegister(1, adbdata, &adblength);
  if( (adbdata[0] == 't') && (adbdata[1] = 'p') && (adbdata[2] == 'a') && (adbdata[3] == 'd') )
  {
    mach_timespec_t     t;
    OSNumber 		*jitter_num;

    t.tv_sec = 1; //Wait for keyboard driver for up to 1 second
    t.tv_nsec = 0;
    typeTrackpad = TRUE;
    enableEnhancedMode();
    _pADBKeyboard = waitForService(serviceMatching("AppleADBKeyboard"), &t);
    jitter_num = OSDynamicCast( OSNumber, getProperty("Trackpad Jitter Milliseconds"));
    if (jitter_num)
    {
	_jitterclicktime64 = jitter_num->unsigned16BitValue() * 1000 * 1000;  // in nanoseconds;
	nanoseconds_to_absolutetime(  _jitterclicktime64, &_jitterclicktimeAB);
    }
    else
    {
	_jitterclicktime64 = 750 * 1000 * 1000;  // in nanoseconds;
	nanoseconds_to_absolutetime(  _jitterclicktime64, &_jitterclicktimeAB);
    }
    jitter_num = OSDynamicCast( OSNumber, getProperty("Trackpad Jitter Max delta"));
    if (jitter_num)
    {
	_jitterdelta = jitter_num->unsigned16BitValue();
	if (_jitterdelta == 0)
	    _jittermove = false;
    }
    else
    {
	_jitterdelta = 16;  // pixels;
    }
    setProperty(kIOHIDPointerAccelerationTypeKey, kIOHIDTrackpadAccelerationType); 
    
    //This is the only way to find out if we have new trackpad with W info passed in relative mode
    if (_buttonCount == 4)
    {
	_buttonCount = 2;	//Assume Apple trackpads will always have 
				//only 1 button and 1 gesture click
        setProperty("W Enhanced Trackpad", (unsigned long long)true, sizeof(Clicking)*8);
	_isWEnhanced = true;
	_usePantherSettings = false;
	_jitterclick = _jittermove;	//Necessary since Mouse Pref fix isn't available
    }  
    else
    {
	_isWEnhanced = false;
	//Don't even bother to set the property.  Its ABSENCE will be just as informative.
    }
  } //end of trackpad processing
  
  return super::start(provider);
}


void AppleADBMouseType4::free( void )
{
    if (_notifierA)
    {
	_notifierA->remove();
	_notifierA = NULL;
    }
    if (_notifierT)
    {
	_notifierT->remove();
	_notifierT = NULL;
    }
    _ignoreTrackpad = false;
    _sticky2finger = false;
    _zonepeckingtimeAB = _keyboardTimeAB;  //unsticks trackpad when sleeping
    
    if (_gettime)
	_gettime->release();
    
    if (_mouseLock)
    {
	IOLock * lock;

	IOLockLock(_mouseLock);

	lock = _mouseLock;
	_mouseLock = NULL;

	IOLockUnlock(lock);
	IOLockFree(lock);
    }

    super::free();
}

bool check_usb_mouse(OSObject * us, void *, IOService * yourDevice)
{
    if (us)
    {
	((AppleADBMouseType4 *)us)->_check_usb_mouse();
    }
    return true;
}

/*
 *  If a USB mouse HID driver is found, then disable the trackpad.
 */
void AppleADBMouseType4::_check_usb_mouse( void ) 
{
    IOService		*pHIDDevice;
    bool		foundUSBHIDMouse = false;
	
    OSIterator	*iterator = NULL;
    OSDictionary	*dict = NULL;
    OSNumber  	*usbClass, *usbPage, *usbUsage;

    dict = IOService::serviceMatching( "IOUSBHIDDriver" );
    if( dict )
    {
	iterator = IOService::getMatchingServices( dict );
	if( iterator )
	{
	    while( (pHIDDevice = (IOHIDDevice *) iterator->getNextObject()) )
	    {
		usbClass = OSDynamicCast( OSNumber, pHIDDevice->getProperty("bInterfaceClass"));
		usbPage = OSDynamicCast( OSNumber, pHIDDevice->getProperty("PrimaryUsagePage"));
		usbUsage = OSDynamicCast( OSNumber, pHIDDevice->getProperty("PrimaryUsage"));

		if ((usbClass == NULL) || (usbPage == NULL) || (usbUsage == NULL) )
		{
		    IOLog("Null found for properties that should exist in IOUSBHIDDriver\n");
		    continue;
		}

		//Keithen said the only way to find a USB mouse in either boot or report
		//  protocol is to make sure the class is 3 (HID) and the page is 1 (desktop)
		//  and the usage is 2 (mouse).  Subclass is 1 for boot protocol and 0 for
		//  report protocol.  bInterfaceProtocol does not exist as a property for
		//  IOUSBHIDDriver objects.
		if ((usbClass->unsigned16BitValue() == 3) && (usbUsage->unsigned16BitValue() == 2) 
		    && (usbPage->unsigned16BitValue() == 1))
		{
		    _ignoreTrackpad = true;
		    foundUSBHIDMouse = true;
		    break;
		}		
	    }
	}

	if( dict ) dict->release();
	if( iterator ) iterator->release();
    }

    if (!foundUSBHIDMouse) 
    {
	//If USB mouse is unplugged, then restore trackpad operation in ::packet()
	_ignoreTrackpad = false;
    }
    
}


/*
 *  The following ::packet() has not been changed at all.  Enhanced trackpad processing
 *  will automatically go to ::packetW().
*/
void AppleADBMouseType4::packet(UInt8 /*adbCommand*/, IOByteCount length, UInt8 * data)
{
  int		  dx, dy, cnt, numExtraBytes;
  UInt32          buttonState = 0;
  AbsoluteTime	  now;

  if (_notifierA && _notifierT)
  {
    if (typeTrackpad && _ignoreTrackpad) 
      return;
  }

  if(_isWEnhanced)  //This also implies typeTrackpad == true
  {
    packetW(0, length, data);
    return;
  }
  
  numExtraBytes = length - 2;
  dy = data[0] & 0x7f;
  dx = data[1] & 0x7f;
  
  if ((data[0] & 0x80) == 0) 
  {
    buttonState |= 1;
  }
  
  if ((deviceNumButtons > 1) && ((data[1] & 0x80) == 0))
  {
    if(typeTrackpad)
    {
	if ((_jitterclick) && (_pADBKeyboard))
	{
	    AbsoluteTime	keyboardtime; 
	    UInt64		nowtime64, keytime64;

	    keyboardtime.hi = 0;
	    keyboardtime.lo = 0;
	    _pADBKeyboard->callPlatformFunction(_gettime, false, 
		(void *)&keyboardtime, 0, 0, 0);
	    clock_get_uptime(&now);
	    absolutetime_to_nanoseconds(now, &nowtime64);
	    absolutetime_to_nanoseconds(keyboardtime, &keytime64);
	    if (nowtime64 - keytime64 > _jitterclicktime64)
	    {
		buttonState |= 1;
	    }
	}
	else
	    buttonState |= 1;
    }
    else
    {
        buttonState |= 2;
    }
  }

  for (cnt = 0; cnt < numExtraBytes; cnt++) {
    dy |= ((data[2 + cnt] >> 4) & 7) << (7 + (cnt * 3));
    dx |= ((data[2 + cnt])      & 7) << (7 + (cnt * 3));
    
    if ((deviceNumButtons > (cnt + 2)) && ((data[2 + cnt] & 0x80) == 0))
      buttonState |= 4 << (cnt * 2);
    if ((deviceNumButtons > (cnt + 2 + 1)) && ((data[2 + cnt] & 0x08) == 0))
      buttonState |= 4 << (cnt * 2 + 1);
  }
  
  if (dy & (0x40 << (numExtraBytes * 3)))
    dy |= (0xffffffc0 << (numExtraBytes * 3));
  if (dx & (0x40 << (numExtraBytes * 3)))
    dx |= (0xffffffc0 << (numExtraBytes * 3));
  
  clock_get_uptime(&now);
  if(typeTrackpad)
  {
	if (_jittermove)
	{
	    if (_pADBKeyboard)
	    {
		AbsoluteTime	keyboardtime; 
		UInt64		nowtime64, keytime64;

		keyboardtime.hi = 0;
		keyboardtime.lo = 0;
		_pADBKeyboard->callPlatformFunction(_gettime, false, (void *)&keyboardtime, 0, 0, 0);
		absolutetime_to_nanoseconds(now, &nowtime64);
		absolutetime_to_nanoseconds(keyboardtime, &keytime64);
		if (nowtime64 - keytime64 < _jitterclicktime64)
		{
		    if ((my_abs(dx) < _jitterdelta) && (my_abs(dy) < _jitterdelta))
		    {
			if (!buttonState)
			{
			    //simulate no mouse move.  Keeps cursor invisible.
			    return;
			}
			else
			{
			    dx = 0;
			    dy = 0;
			}
		    }
		}
	    }
	} //jittermove
  }
  dispatchRelativePointerEvent(dx, dy, buttonState, now);
}

/*
 * The following ::packetW() assumes two flags:  
 * _isWEnhanced is true and typeTrackpad is true.
*/
void AppleADBMouseType4::packetW(UInt8 /*adbCommand*/, IOByteCount length, UInt8 * data)
{
  int		  dx, dy, cnt, numExtraBytes;
  bool		  palm = false, outzone = false, has2fingers = false;
  UInt32          buttonState = 0;
  AbsoluteTime	  now;

  if (_usePantherSettings)
  {
    packetWP(0, length, data);
    return;
  }
  
  numExtraBytes = length - 2;
  dy = data[0] & 0x7f;
  dx = data[1] & 0x7f;
  
  if ((data[0] & 0x80) == 0) 
  {
    buttonState |= 1;
  }

  //Here we check for inadvertent palm presses and outside-zone clicks.  In theory I 
  //  should check for gesture clicks when outzone below is true, but the
  //  trackpad never picks up on that.  Can't make gesture clicks using edge of
  //  my palm either.
  //if(_isWEnhanced)  //This also implies typeTrackpad == true
  {
      if ((data[2] & 0x80) == 0)
      {
	  if (_zonenomove)
	    outzone = true;
      }
      if ((data[2] & 0x08) == 0)
      {
	  if (_palmnomove)
	    palm = true;
      }
      if ((data[3] & 0x80) == 0)
      {
	  if (_2fingernoaction)
	  {
	    
      	    has2fingers = true;
	    _sticky2finger = true;	    
	    //I need to log when it became sticky for timeout purposes
	    clock_get_uptime(&_sticky2fingerTimeAB);
	  }
      }
      if ((data[3] & 0x08) != 0)
      {
	  //All fingers are off the trackpad now, so clear sticky bit
	  _sticky2finger = false;	  
      }
      //Fake a 2 finger contact if sticky bit is still on.  But calculate time delta first.
      if (_sticky2finger)
      {
	  AbsoluteTime	nowtimeAB;
	  
	  clock_get_uptime(&nowtimeAB);
	  //if (nowtime64 - _sticky2fingerTime64 < _timeoutSticky64)
	  SUB_ABSOLUTETIME(&nowtimeAB, &_sticky2fingerTimeAB);
	  if ( CMP_ABSOLUTETIME(&nowtimeAB, &_timeoutStickyAB) == -1)
	  {
	      has2fingers = true;
	  }
	  else
	  {
	      _sticky2finger = false;  //Make it more efficient
	  }
      }

      //Apple trackpads should not have more than two buttons.  Non-Apple trackpads
      // should never match the "tpad" signature anyways.
      data[2] |= 0x88;  //clear two button bits, both negative logic
      data[3] |= 0x88;	//Assume Apple trackpads will never have multiple buttons for ADB
  }

  if ((deviceNumButtons > 1) && ((data[1] & 0x80) == 0))
  {
    //if(typeTrackpad)
    {
	if ((_jitterclick) && (_pADBKeyboard))
	{
	    _keyboardTimeAB.hi = 0;
	    _keyboardTimeAB.lo = 0;
	    _pADBKeyboard->callPlatformFunction(_gettime, false, 
		(void *)&_keyboardTimeAB, 0, 0, 0);
	    clock_get_uptime(&now);
	    SUB_ABSOLUTETIME(&now, &_keyboardTimeAB);
	    if ( CMP_ABSOLUTETIME(&now, &_jitterclicktimeAB) == 1)	    
	    //if (nowtime64 - keytime64 > _jitterclicktime64)
	    {
		buttonState |= 1;
		//This part automatically takes care of narrow objects along outside zones.
		//It is accepted if no recent typing, it is filtered if recent typing
		//The rejection is taken care of by code below, not here
	    }
	    //This is new for WEnhanced trackpads: ANYTHING in center of pad is ALWAYS accepted.
	    //  That means even when typing.... this differs from old behavior 
	    if ( !outzone)
	    {
		buttonState |= 1;  // EB .. this could come first
	    }
	    if (CMP_ABSOLUTETIME( &_zonepeckingtimeAB, &_keyboardTimeAB) != 0)
	    {
		buttonState = 0;
	    }
	}
	else
	    buttonState |= 1;
    }
  }

  for (cnt = 0; cnt < numExtraBytes; cnt++) {
    dy |= ((data[2 + cnt] >> 4) & 7) << (7 + (cnt * 3));
    dx |= ((data[2 + cnt])      & 7) << (7 + (cnt * 3));
    
    if ((deviceNumButtons > (cnt + 2)) && ((data[2 + cnt] & 0x80) == 0))
      buttonState |= 4 << (cnt * 2);
    if ((deviceNumButtons > (cnt + 2 + 1)) && ((data[2 + cnt] & 0x08) == 0))
      buttonState |= 4 << (cnt * 2 + 1);
  }
  
  if (dy & (0x40 << (numExtraBytes * 3)))
    dy |= (0xffffffc0 << (numExtraBytes * 3));
  if (dx & (0x40 << (numExtraBytes * 3)))
    dx |= (0xffffffc0 << (numExtraBytes * 3));
  
  clock_get_uptime(&now);
  
    //If UI sets _jittermove, then we need special filtering for W Enhanced trackpads.
    //  That checkbox implies that ALL multi-finger presses are filtered.
    //  Also, if both outzone and palm are true, meaning palm on outside edges,
    //  then that is always filtered.
    if (_jittermove) 
    {
	if ((has2fingers) || (outzone && palm))
	{
	    if (!buttonState)
	    {
		//simulate no mouse move.  Keeps cursor invisible.
		return;
	    }
	    else if ((data[1] & 0x80) == 0) //filter out gesture clicks
	    {
		return;
	    }
	    else
	    {
		dx = 0;
		dy = 0;
	    }
	}
    
	//This is new for WEnhanced trackpads: ANYTHING in center of pad is ALWAYS accepted
	// unless 2 finger (or sticky 2 finger)  is active above.  Note also that palm
	// input is rejected above ONLY if the palm is along the edge.  Palm contact in
	// center of pad will always be allowed.
	if (( !outzone) && (_pADBKeyboard))
	{	    
	    _keyboardTimeAB.hi = 0;
	    _keyboardTimeAB.lo = 0;
	    _pADBKeyboard->callPlatformFunction(_gettime, false, (void *)&_zonepeckingtimeAB, 0, 0, 0);
	} else
	if (_pADBKeyboard)
	{
	    _keyboardTimeAB.hi = 0;
	    _keyboardTimeAB.lo = 0;
	    _pADBKeyboard->callPlatformFunction(_gettime, false, (void *)&_keyboardTimeAB, 0, 0, 0);
	    nanoseconds_to_absolutetime( (unsigned long long)( (unsigned long long)(5 * 60 * 1000) * (unsigned long long)(1000 * 1000) ), &_fake5minAB);
	    SUB_ABSOLUTETIME(&now, &_keyboardTimeAB);
	    if (CMP_ABSOLUTETIME (&now, &_fake5minAB) == -1) 
	    //if (nowtime64 - keytime64 < _fake5min)
	    {
		//This part rejects all movements along the edge when typing.  By
		//  logic that means narrow contact along edge.  Wide contact along
		//  edge (regardless of recent keyboarding) was already filtered out above.
		//if  (_zonepeckingtime64 != keytime64)
		if ( CMP_ABSOLUTETIME ( &_zonepeckingtimeAB, &_keyboardTimeAB) != 0)
		{
		    if (!buttonState)
		    {
			//simulate no mouse move.  Keeps cursor invisible.
			return;
		    }
		    else if ((data[1] & 0x80) == 0) 
		    {
			return;
		    }
		    else
		    {
			dx = 0;
			dy = 0;
		    }
		}
	    }
	}
    } //jittermove

  dispatchRelativePointerEvent(dx, dy, buttonState, now);
}


/*
 *  Next method is mostly for exploring future Panther filtering for trackpads.
 *  Since it is called by ::packetW(), it also assumes a W enhanced trackpad.
 */
void AppleADBMouseType4::packetWP(UInt8 /*adbCommand*/, IOByteCount length, UInt8 * data)
{
  int		  dx, dy, cnt, numExtraBytes;
  bool		  palm = false, outzone = false, has2fingers = false;
  UInt32          buttonState = 0;
  AbsoluteTime	  now;

  numExtraBytes = length - 2;
  dy = data[0] & 0x7f;
  dx = data[1] & 0x7f;
  
  if ((data[0] & 0x80) == 0) 
  {
    buttonState |= 1;
  }

  //Here we check for inadvertent palm presses and outside-zone clicks.  In theory I 
  //  should check for gesture clicks when outzone below is true, but the
  //  trackpad never picks up on that.  Can't make gesture clicks using edge of
  //  my palm either.
  //if(typeTrackpad)
  {
      if ((data[2] & 0x80) == 0)
      {
	  outzone = true;
      }
      if ((data[2] & 0x08) == 0)
      {
      	  palm = true;
      }
      if ((data[3] & 0x80) == 0)
      {
	  if (_2fingernoaction)
	  {
      	    has2fingers = true;
	    _sticky2finger = true;
	    //I need to log when it became sticky for timeout purposes
	    clock_get_uptime(&now);
	    absolutetime_to_nanoseconds(now, &_sticky2fingerTime64);	    
	  }
      }
      if ((data[3] & 0x08) != 0)
      {
	  //All fingers are off the trackpad now, so clear sticky bit
	  _sticky2finger = false;	  
      }
      //Fake a 2 finger contact via palm bit if _sticky2finger is still on
      if (_sticky2finger)
      {
	  UInt64	nowtime64;
	  
	  clock_get_uptime(&now);
	  absolutetime_to_nanoseconds(now, &nowtime64);
	  if (nowtime64 - _sticky2fingerTime64 < _timeoutSticky64)
	  {
	      palm = true;
	  }
	  else
	  {
	      _sticky2finger = false;  //Make it more efficient
	  }
      }
      
      //Apple trackpads should not have more than two buttons.  Non-Apple trackpads
      // should never match the "tpad" signature anyways.
      data[2] |= 0x88;  //clear two button bits, both negative logic
      data[3] |= 0x88;	//Assume Apple trackpads will never have multiple buttons for ADB
  }

  if ((deviceNumButtons > 1) && ((data[1] & 0x80) == 0))
  {
    //if(typeTrackpad)
    {
	if ((_jitterclick) && (_pADBKeyboard))
	{
	    AbsoluteTime	keyboardtime; 
	    UInt64		nowtime64, keytime64;

	    keyboardtime.hi = 0;
	    keyboardtime.lo = 0;
	    _pADBKeyboard->callPlatformFunction(_gettime, false, 
		(void *)&keyboardtime, 0, 0, 0);
	    clock_get_uptime(&now);
	    absolutetime_to_nanoseconds(now, &nowtime64);
	    absolutetime_to_nanoseconds(keyboardtime, &keytime64);
	    if (nowtime64 - keytime64 > _jitterclicktime64)
	    {
		buttonState |= 1;
	    }
	}
	else
	    buttonState |= 1;
    }
  }

  for (cnt = 0; cnt < numExtraBytes; cnt++) {
    dy |= ((data[2 + cnt] >> 4) & 7) << (7 + (cnt * 3));
    dx |= ((data[2 + cnt])      & 7) << (7 + (cnt * 3));
    
    if ((deviceNumButtons > (cnt + 2)) && ((data[2 + cnt] & 0x80) == 0))
      buttonState |= 4 << (cnt * 2);
    if ((deviceNumButtons > (cnt + 2 + 1)) && ((data[2 + cnt] & 0x08) == 0))
      buttonState |= 4 << (cnt * 2 + 1);
  }
  
  if (dy & (0x40 << (numExtraBytes * 3)))
    dy |= (0xffffffc0 << (numExtraBytes * 3));
  if (dx & (0x40 << (numExtraBytes * 3)))
    dx |= (0xffffffc0 << (numExtraBytes * 3));
  
  clock_get_uptime(&now);
  if(typeTrackpad )
  {
	//The UI is expected to affect _palmnoaction but not _zonenoaction.  However,
	//  I am leaving _zonenoaction to a default of false.  Someone may find
	//  it useful some day and set it to true.
	if ((_2fingernoaction && has2fingers) || (_palmnoaction && palm) || 
	    (_zonenoaction && outzone))
	{
	    if (!buttonState)
	    {
		//simulate no mouse move.  Keeps cursor invisible.
		return;
	    }
	    else
	    {
		dx = 0;
		dy = 0;
	    }
	}

	if (_jittermove)
	{
	    if (_pADBKeyboard)
	    {
		AbsoluteTime	keyboardtime; 
		UInt64		nowtime64, keytime64;

		keyboardtime.hi = 0;
		keyboardtime.lo = 0;
		_pADBKeyboard->callPlatformFunction(_gettime, false, (void *)&keyboardtime, 0, 0, 0);
		absolutetime_to_nanoseconds(now, &nowtime64);
		absolutetime_to_nanoseconds(keyboardtime, &keytime64);
		if (nowtime64 - keytime64 < _jitterclicktime64)
		{
		    if ((my_abs(dx) < _jitterdelta) && (my_abs(dy) < _jitterdelta))
		    {
			if (!buttonState)
			{
			    //simulate no mouse move.  Keeps cursor invisible.
			    return;
			}
			else
			{
			    dx = 0;
			    dy = 0;
			}
		    }
		}
	    }
	} //jittermove
	
	//I am assuming the UI eventually will make _zonenomove and _jittermove mutually
	//  exclusive, but for now I'll allow possibility of both being active.  Actions
	//  in _jitternomove code above take precedence, of course, and they affect the
	//  entire trackpad, not just certain zones.  The UI should not make _zonenomove
	//  available for older PowerBooks
	if (_zonenomove)
	{
	    if (_pADBKeyboard)
	    {
		AbsoluteTime	keyboardtime; 
		UInt64		nowtime64, keytime64;

		keyboardtime.hi = 0;
		keyboardtime.lo = 0;
		_pADBKeyboard->callPlatformFunction(_gettime, false, (void *)&keyboardtime, 0, 0, 0);
		absolutetime_to_nanoseconds(now, &nowtime64);
		absolutetime_to_nanoseconds(keyboardtime, &keytime64);
		if (nowtime64 - keytime64 < _jitterclicktime64)
		{
		    //_palmnomove will not be in UI and it should default to off, but I
		    //  am leaving this property here for now in case someone finds it useful.
		    //  _palmnoaction is intended for the main palm check feature and
		    //  supercedes _palmnomove.  Note also that I am rejecting even valid
		    //  clicks from the physical button (not just gestures) because the
		    //  entire palm may be on the trackpad
		    if (_palmnomove && palm)
		    {
			return;
		    }
		    
		    //If it has been a while since the user last touched the ADB keyboard,
		    //  then movements should be allowed anywhere on trackpad, but 
		    //  then we would not be in this part of the driver anyways.
		    if (outzone)
		    {
			// _ignorezone is set below if user touches middle (major) zone of trackpad.
			// _ignorezone is set to false initially in ::enableEnhancedMode()
			if (!_ignorezone)
			{
			    if (!buttonState)
			    {
				return;
			    }
			    else if ((data[1] & 0x80) == 0) //filter out gesture clicks
			    {
				return;
			    }
			    else
			    {
				dx = 0;
				dy = 0;
			    }
			}
		    }
		    else
		    {
			//If user touches within center of trackpad and not outside edges, 
			//  assume the touch is intentional so then set a flag so that even
			//  if the user strays to edges again within our time period, those
			//  moves will not be filtered out
			_ignorezone = true;
		    }
		}
		else //if long time has passed, reset zone checking for subsequent keyboard clicks
		{
		    _ignorezone = false;
		}
	    }
	} //_zonenomove


	//Again I am assuming the UI will make following _zonepecknomove mutually exclusive from 
	// _zonenomove and _jittermove above, meaning only ONE of the three would be active.
	// However, to keep our options flexible for now I will allow all three to be active
	// simultaneously.
	if (_zonepecknomove)
	{
	    if (_pADBKeyboard)
	    {
		AbsoluteTime	keyboardtime; 
		UInt64		keytime64;

		keyboardtime.hi = 0;
		keyboardtime.lo = 0;
		_pADBKeyboard->callPlatformFunction(_gettime, false, (void *)&keyboardtime, 0, 0, 0);
		absolutetime_to_nanoseconds(keyboardtime, &keytime64);
		if (outzone)
		{
		    //if user had pressed a new keyboard key since the last time the trackpad
		    //  was touched in the center zone, we need to cut that trackpad movement out.
		    //  This is intended as a PERMANENT filtering for as long as the user does 
		    //  not touch the center zone of the trackpad
		    if  (_zonepeckingtime64 != keytime64)
		    {
			if (!buttonState)
			{
			    return;
			}
			else if ((data[1] & 0x80) == 0) //filter out gesture clicks
			{
			    return;
			}
			else
			{
			    dx = 0;
			    dy = 0;
			}
		    }
		}
		else
		{
		    //Save time of last keypress since user is moving withing center zone now
		    _zonepeckingtime64 = keytime64;
		}
		
	    }
	} // _zonepecknomove

  }
  dispatchRelativePointerEvent(dx, dy, buttonState, now);
}



OSData * AppleADBMouseType4::copyAccelerationTable()
{
    char keyName[10];

    strcpy( keyName, "accl" );
    keyName[4] = (deviceSignature >> 24);
    keyName[5] = (deviceSignature >> 16);
    keyName[6] = (deviceSignature >> 8);
    keyName[7] = (deviceSignature >> 0);
    keyName[8] = 0;

    IOLockLock( _mouseLock);

    OSData * data = OSDynamicCast( OSData,
                getProperty( keyName ));
    IOLockUnlock( _mouseLock);
	
    if( data)
    {
        data->retain();
    }
    else
    {
        data = super::copyAccelerationTable();
    }
        
    return( data );
}

// ****************************************************************************
// enableEnhancedMode
//
// ****************************************************************************

bool AppleADBMouseType4::enableEnhancedMode()
{
    UInt8       adbdata[8];
    IOByteCount adblength = 8;
    OSNumber 	*plistnum;
    
    //IOLog("enableEnhancedMode called.\n");
    adbDevice->readRegister(1, adbdata, &adblength);

    if((adbdata[6] != 0x0D))
    {
        adbdata[6] = 0xD;
        if (adbDevice->writeRegister(1, adbdata, &adblength) != 0)
            return FALSE;
        if (adbDevice->readRegister(1, adbdata, &adblength) != 0)
            return FALSE;
        if (adbdata[6] != 0x0D)
        {
            IOLog("AppleADBMouseType4 deviceClass = %d (non-Extended Mode)\n", adbdata[6]);
            return FALSE;
        }
        //IOLog("AppleADBMouseType4 deviceClass = %d (Extended Mode)\n", adbdata[6]);

        // Set ADB Extended Features to default values.
        adbdata[0] = 0x19;  //MSB=Use Soft click (gesture).  7 bits for DownTime.
        adbdata[1] = 0x14;
        adbdata[2] = 0x19;
        adbdata[3] = 0xB2;  //MSB=Use sticky drag.  7 bits for StickyDragTime.
        adbdata[4] = 0xB2;
        adbdata[5] = 0x8A;
        adbdata[6] = 0x1B;
//WARNING... next one may have a conflict
        //adbdata[7] = 0x50;
        adbdata[7] = 0x57;  //bits 3:0 for W mode
        adblength = 8;

        adbDevice->writeRegister(2, adbdata, &adblength);

        /* Add IORegistry entries for Enhanced mode */
        Clicking = FALSE;
        Dragging = FALSE;
        DragLock = FALSE;
        
        setProperty("Clicking", (unsigned long long)Clicking, sizeof(Clicking)*8);
        setProperty("Dragging", (unsigned long long)Dragging, sizeof(Dragging)*8);
        setProperty("DragLock", (unsigned long long)DragLock, sizeof(DragLock)*8);
	
	/* check for jitter correction initially before Mouse Preferences
	   calls setParamProperties*/
	plistnum = OSDynamicCast( OSNumber, getProperty("JitterNoClick"));
	if (plistnum)
	{
	    _jitterclick = (bool) plistnum->unsigned16BitValue();
	}
	else
	{
	    _jitterclick = false;
	}
	
	plistnum = OSDynamicCast( OSNumber, getProperty("JitterNoMove"));
	if (plistnum)
	{
	    _jittermove = (bool) plistnum->unsigned16BitValue();
	}
	else
	{
	    _jittermove = false;
	}	

	if (_isWEnhanced)  //W enhanced trackpads should get filtering on by default
	{
	    setProperty("JitterNoClick", true, sizeof(UInt32));
	    setProperty("JitterNoMove", true, sizeof(UInt32));
	    _jitterclick = _jittermove = true;
	}

	plistnum = OSDynamicCast( OSNumber, getProperty("W sticky input timeout"));
	if (plistnum)
	{
	    _timeoutSticky64 = plistnum->unsigned32BitValue() * 1000 * 1000;  // in nanoseconds;
	    nanoseconds_to_absolutetime(_timeoutSticky64, &_timeoutStickyAB);
	}
	else
	{
	    _timeoutSticky64 = 500 * 1000 * 1000;  // 500 millisecond sticky timeout
	    nanoseconds_to_absolutetime(_timeoutSticky64, &_timeoutStickyAB);
	}	
		
	
	plistnum = OSDynamicCast( OSNumber, getProperty("W threshold"));
	if (plistnum)
	{
	    _WThreshold = (UInt8) plistnum->unsigned16BitValue();
	}
	else
	{
	    _WThreshold = 7;  //Arbitrary value for medium size thumbs
	}	
		
	plistnum = OSDynamicCast( OSNumber, getProperty("TwofingerNoAction"));
	if (plistnum)
	{
	    _2fingernoaction = (bool) plistnum->unsigned16BitValue();
	}
	else
	{
	    _2fingernoaction = false;
	}	
		
	plistnum = OSDynamicCast( OSNumber, getProperty("PalmNoAction Permanent"));
	if (plistnum)
	{
	    _palmnoaction = (bool) plistnum->unsigned16BitValue();
	}
	else
	{
	    _palmnoaction = false;
	}	
	
	plistnum = OSDynamicCast( OSNumber, getProperty("PalmNoAction When Typing"));
	if (plistnum)
	{
	    _palmnomove = (bool) plistnum->unsigned16BitValue();
	}
	else
	{
	    _palmnomove = false;
	}	

	plistnum = OSDynamicCast( OSNumber, getProperty("OutsidezoneNoAction Permanent"));
	if (plistnum)
	{
	    _zonenoaction = (bool) plistnum->unsigned16BitValue();
	}
	else
	{
	    _zonenoaction = false;
	}	
	
	plistnum = OSDynamicCast( OSNumber, getProperty("OutsidezoneNoAction When Typing"));
	if (plistnum)
	{
	    _zonenomove = (bool) plistnum->unsigned16BitValue();
	}
	else
	{
	    _zonenomove = false;
	}
	
	plistnum = OSDynamicCast( OSNumber, getProperty("OutsidezoneNoAction When Pecking"));
	if (plistnum)
	{
	    _zonepecknomove = (bool) plistnum->unsigned16BitValue();
	}
	else
	{
	    _zonepecknomove = false;
	}
	
	_ignorezone = false;
	_zonepeckingtime64 = 0;	
	nanoseconds_to_absolutetime(0, &_zonepeckingtimeAB);
        return TRUE;
    }

    return FALSE;
}

// ****************************************************************************
// setParamProperties
//
// ****************************************************************************
IOReturn AppleADBMouseType4::setParamProperties( OSDictionary * dict )
{
    OSData *	data;
    OSNumber 	*datan;
    IOReturn	err = kIOReturnSuccess;
    UInt8       adbdata[8];
    IOByteCount adblength;
 
    if (typeTrackpad == TRUE) 
    {  
	IOLockLock( _mouseLock); 
	if (data = OSDynamicCast(OSData, dict->getObject("Clicking"))) 
	{
	    adblength = sizeof(adbdata);
	    adbDevice->readRegister(2, adbdata, &adblength);
	    adbdata[0] = (adbdata[0] & 0x7F) | (*( (UInt8 *) data->getBytesNoCopy() ))<<7;
	    setProperty("Clicking", (unsigned long long)((adbdata[0]&0x80)>>7), sizeof(adbdata[0])*8);
	    adbDevice->writeRegister(2, adbdata, &adblength);
	}
    
	if (data = OSDynamicCast(OSData, dict->getObject("Dragging"))) 
	{
	    adblength = sizeof(adbdata);
	    adbDevice->readRegister(2, adbdata, &adblength);
	    adbdata[1] = (adbdata[1] & 0x7F) | (*( (UInt8 *) data->getBytesNoCopy() ))<<7;
	    setProperty("Dragging", (unsigned long long)((adbdata[1]&0x80)>>7), sizeof(adbdata[1])*8);
	    adbDevice->writeRegister(2, adbdata, &adblength);
	}
    
	if (data = OSDynamicCast(OSData, dict->getObject("DragLock"))) 
	{
	    adblength = sizeof(adbdata);
	    adbDevice->readRegister(2, adbdata, &adblength);
	    adbdata[3] = *((UInt8 *) data->getBytesNoCopy());
    
	    if(adbdata[3])
	    {
		setProperty("DragLock", (unsigned long long)adbdata[3], sizeof(adbdata[3])*8);
		adbdata[3] = 0xFF;
		adblength = sizeof(adbdata);
		adbDevice->writeRegister(2, adbdata, &adblength);
	    }
	    else
	    {
		setProperty("DragLock", (unsigned long long)adbdata[3], sizeof(adbdata[3])*8);
		adbdata[3] = 0xB2;
		adblength = sizeof(adbdata);
		adbDevice->writeRegister(2, adbdata, &adblength);
	    }
	}
	
	if (datan = OSDynamicCast(OSNumber, dict->getObject("JitterNoClick"))) 
	{
	    _jitterclick = (bool) datan->unsigned32BitValue();
	    setProperty("JitterNoClick", _jitterclick, sizeof(UInt32));
	}
	
	if (datan = OSDynamicCast(OSNumber, dict->getObject("JitterNoMove"))) 
	{
	    _jittermove = (bool) datan->unsigned32BitValue();
	    setProperty("JitterNoMove", _jittermove, sizeof(UInt32));
	    _jitterclick = _jittermove;
	}
    
	if (datan = OSDynamicCast(OSNumber, dict->getObject("Trackpad Jitter Milliseconds"))) 
	{
	    _jitterclicktime64 = datan->unsigned32BitValue() * 1000 * 1000;  // in nanoseconds;
	    setProperty("Trackpad Jitter Milliseconds", datan->unsigned32BitValue(), 
		8 * sizeof(adbdata[1]));
	    nanoseconds_to_absolutetime (_jitterclicktime64, &_jitterclicktimeAB);
	}

	if (datan = OSDynamicCast(OSNumber, dict->getObject("W sticky input timeout"))) 
	{
	    _timeoutSticky64 = datan->unsigned32BitValue() * 1000 * 1000;  // in nanoseconds;
	    setProperty("W sticky input timeout", datan->unsigned32BitValue(), 
		8 * sizeof(adbdata[1]));
	    nanoseconds_to_absolutetime(_timeoutSticky64, &_timeoutStickyAB);
	}

	if (datan = OSDynamicCast(OSNumber, dict->getObject("W threshold"))) 
	{
	    _WThreshold = (UInt8) datan->unsigned32BitValue();
	    _WThreshold &= 0xf;	//f is max threshold
	    setProperty("W threshold", _WThreshold, sizeof((adbdata[2]) * 8));
	    adblength = sizeof(adbdata);
	    adbDevice->readRegister(2, adbdata, &adblength);
	    adbdata[7] = adbdata[7] & 0xf0;  //only set bits 3..0
	    adbdata[7] = adbdata[7] | _WThreshold;

	    adblength = sizeof(adbdata);
	    adbDevice->writeRegister(2, adbdata, &adblength);

#if 0	    
	    //Now test it, and log problems
	    adblength = sizeof(adbdata);
	    adbDevice->readRegister(1, adbdata, &adblength);
	    if((adbdata[6] != 0x0D))
	    {
		IOLog("Gestures are not in mode 0x0D\n");
	    }
	    adblength = sizeof(adbdata);
	    adbdata[7] = 0;  //sanity check
	    adbDevice->readRegister(2, adbdata, &adblength);
#endif

	}
        
	
	if (datan = OSDynamicCast(OSNumber, dict->getObject("Use Panther Settings for W"))) 
	{
	    _usePantherSettings = (bool) datan->unsigned32BitValue();
	    setProperty("Use Panther Settings for W", _usePantherSettings, sizeof(UInt32));
	}
	
	if (datan = OSDynamicCast(OSNumber, dict->getObject("PalmNoAction Permanent"))) 
	{
	    _palmnoaction = (bool) datan->unsigned32BitValue();
	    setProperty("PalmNoAction Permanent", _palmnoaction, sizeof(UInt32));
	}
    
	if (datan = OSDynamicCast(OSNumber, dict->getObject("PalmNoAction When Typing"))) 
	{
	    _palmnomove = (bool) datan->unsigned32BitValue();
	    setProperty("PalmNoAction When Typing", _palmnomove, sizeof(UInt32));
	}

	if (datan = OSDynamicCast(OSNumber, dict->getObject("TwofingerNoAction"))) 
	{
	    _2fingernoaction = (bool) datan->unsigned32BitValue();
	    setProperty("TwofingerNoAction", _2fingernoaction, sizeof(UInt32));
	}

    
	if (datan = OSDynamicCast(OSNumber, dict->getObject("OutsidezoneNoAction Permanent"))) 
	{
	    _zonenoaction = (bool) datan->unsigned32BitValue();
	    setProperty("OutsidezoneNoAction Permanent", _zonenoaction, sizeof(UInt32));
	}
    
	if (datan = OSDynamicCast(OSNumber, dict->getObject("OutsidezoneNoAction When Typing"))) 
	{
	    _zonenomove = (bool) datan->unsigned32BitValue();
	    setProperty("OutsidezoneNoAction When Typing", _zonenomove, sizeof(UInt32));
	}
    
	if (datan = OSDynamicCast(OSNumber, dict->getObject("OutsidezoneNoAction When Pecking"))) 
	{
	    _zonepecknomove = (bool) datan->unsigned32BitValue();
	    setProperty("OutsidezoneNoAction When Pecking", _zonepecknomove, sizeof(UInt32));
	}
    
	if (datan = OSDynamicCast(OSNumber, dict->getObject("USBMouseStopsTrackpad"))) 
	{
	    UInt8		mode;
    
	    mode = datan->unsigned32BitValue();	
	    setProperty("USBMouseStopsTrackpad", (unsigned long long)(mode), sizeof(mode)*8);
	    if (mode)
	    {
		if ( ! _notifierA)
		    _notifierA = addNotification( gIOFirstMatchNotification, serviceMatching( "IOUSBHIDDriver" ), 
			(IOServiceNotificationHandler)check_usb_mouse, this, 0 ); 
		if (! _notifierT)
		    _notifierT = addNotification( gIOTerminatedNotification, serviceMatching( "IOUSBHIDDriver" ), 
			(IOServiceNotificationHandler)check_usb_mouse, this, 0 ); 
		//The same C function can handle both firstmatch and termination notifications
	    }
	    else
	    {
		if (_notifierA)
		{
		    _notifierA->remove();
		    _notifierA = NULL;
		}
		if (_notifierT)
		{
		    _notifierT->remove();
		    _notifierT = NULL;
		}
		_ignoreTrackpad = false;
	    }
    
	}
	IOLockUnlock( _mouseLock);
    }  // end of typeTrackpad
#if 0
    // For debugging purposes
    adblength = 8;
    adbDevice->readRegister(2, adbdata, &adblength);
    IOLog("adbdata[0] = 0x%x\n", adbdata[0]);
    IOLog("adbdata[1] = 0x%x\n", adbdata[1]);
    IOLog("adbdata[2] = 0x%x\n", adbdata[2]);
    IOLog("adbdata[3] = 0x%x\n", adbdata[3]);
    IOLog("adbdata[4] = 0x%x\n", adbdata[4]);
    IOLog("adbdata[5] = 0x%x\n", adbdata[5]);
    IOLog("adbdata[6] = 0x%x\n", adbdata[6]);
    IOLog("adbdata[7] = 0x%x\n", adbdata[7]);
#endif

    if (err == kIOReturnSuccess)
    {
        return super::setParamProperties(dict);
    }
    
    IOLog("AppleADBMouseType4::setParamProperties failing here\n");
    return( err );
}