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Date: Sat, 27 Mar 2010 10:27:29 +0100
From: Gary Jennejohn <gary.jennejohn@freenet.de>
To: Gleb Smirnoff <glebius@FreeBSD.org>
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Cc: arch@FreeBSD.org
Subject: Re: touch panel support
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On Sat, 27 Mar 2010 00:17:06 +0300
Gleb Smirnoff <glebius@FreeBSD.org> wrote:

>   Hello,
> 
>   I've got a display with touch panel, and I'd like to get in working
> in FreeBSD. The touch panel is supported by NetBSD's uep(4). So far,
> I have written uep(4) for FreeBSD, that successfully reads and parses
> data from the USB touch panel device.
> 
>   And then I've got a problem. Our mouse subsystem is not ready for
> touch panels. Our mouse(4) protocol does not support mouse driver
> passing _absolute_ coordinates to the mouse(4) subsystem. It only
> expects a relative movement of the mouse.  But _absolute_ coordinates
> are principal idea of any touch panel.
> 
>   The lesser problem is lack of generic support for touch panel
> calibration.
> 
>   Both of these problems are solved in NetBSD. They've got a wsmux(4)
> device, just like our kbdmux(4), but for mice. This mouse multiplexer
> can also understand absolute coordinates from underlying mice drivers.
> NetBSD also has a generic support for calibration of touch panels.
> 
>   What is the FreeBSD future way to go: port things for NetBSD? Write
> something different?
> 

IMO we should go for porting what NetBSD has.

--
Gary Jennejohn