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From: Parag Warudkar <kernel-stuff@comcast.net>
Date: Tue, 29 Nov 2005 11:11:03 -0500
To: Michael Hanselmann <linux-kernel@hansmi.ch>
Cc: linuxppc-dev@ozlabs.org, debian-powerpc@lists.debian.org,
	linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: PowerBook5,8 - TrackPad update
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On Nov 29, 2005, at 2:50 AM, Michael Hanselmann wrote:
> The mouse moves, but slowly. Maybe something isn't correct yet, but it
> works basically.

Yeah, mine works like that too - but sometimes it will go left->right  
when you moved the finger
right->left and vice versa.

> I get 256 bytes in each transfer as well, but didn't look at the bytes
> behind 40. Maybe that'll help to make it more responsive.

Nope, if yours works with 80 bytes, it only sends 80. It will still  
work with anything > 80 but that's superfluous data.
(E,g, Mine works even with 1024 - anything above 256 seems junk, but  
with < 256 it dies with EOVERFLOW )

Right now I have detected that byte # 13 increases when moving finger  
along the bottom from left corner to right,
and byte #11 changes when moved from bottom left corner to top left.  
Gotta figure out the rest of the movement patterns
along with how many total sensors X and Y are there and how to relate  
the data to something to report to the input device!

Hopefully Johannes will have a PowerBook with either of the 0x0214 or  
0x0215 touchpads
and we will make some headway!

Parag