ALPS GlidePoint

[schippermaarten]

Hi everyone

 

After reading a lot of posts of people complaining they couldn't tap their ALPS touchpad, I decided to take a look at the source of ApplePS2Trackpad.kext. After fidling around with it, I discovered the following:

 

1- The reason some people don't get a "Trackpad" menu in the "Mouse and Keyboard" preference pane is because the ALPS part of the kext fails to load.

 

2- ApplePS2ALPSGlidePoint.cpp contains a function which requests a three byte value from the pad and another one to idenfify your pad, which requires this three byte value:

 

byte0 = request->commands[9].inOrOut;

byte1 = request->commands[10].inOrOut;

byte2 = request->commands[11].inOrOut;

// IOLog("%s:%s three bytes returned are: [%02x %02x %02x]\n", getName(), __FUNCTION__, byte0, byte1, byte2);

The three bytes returned for my pad are: 73 02 0a

bool IsItALPS(UInt8 byte0, UInt8 byte1, UInt8 byte2)

{

bool success = false;

short i;

 

#define NUM_SINGLES 9

static int singles[NUM_SINGLES * 3] ={

0x33,0x2,0xa,

0x53,0x2,0x0a,

0x53,0x2,0x14,

0x63,0x2,0xa,

0x63,0x2,0x14,

// 0x73,0x2,0xa, // 3622947

0x63,0x2,0x28,

0x63,0x2,0x3c,

0x63,0x2,0x50,

0x63,0x2,0x64};

...

My value appears to have been left out... I uncommented the line and compiled the kext. After reboot the kext reported it had loaded:

ApplePS2TrackPad: ALPS GlidePoint v10.115

However, as soon as I touched the pad the cursor went crazy... Appearently the pad sends confusing data and that's probably the reason why Apple left it out. Yet after having attached an usb mouse I could see that now in the "Mouse and Keyboard" preferences, the "TrackPad" menu was enabled.

 

I'm stuck here, any help would be greatly appreciated.

[TopazBar]

Here is what I had to do to get the tap working.

 

http://forum.osx86project.org/lofiversion/...php/t13029.html

 

After further examination, I think the hack is making the trackpad kext unloadable which is forcing the parent

driver (PS2Controller) to handling the tapping which is fine for my purposes.

 

But I got curious and started to study the trackpad code too. But what I couldn't do was to complete the

build. I'm missing <IOKit/ps/*.h>. Where did u find the missing include files?