Re: [PATCH 59/70] USB Input: Added kernel module to support all GTCO CalComp USB InterWrite School products

Maybe.  Attached is a high level diagram of the architecture that we
used in order to prevent the end user from having to modify the x config
file manually whenever they add a new digitizer. With this architecture,
the end user doesn't need to know what device node the digitizer is
attached to and the X config file doesn't need to be constantly
modified.  So, as far as the end user is concerned the Digitizers are
hot plug-able.  

So, to my question.  In order to use EVIOCGRAB ioctl in my X driver,
don't I have to already know the device node that the digitizer is
attached to?

On Mon, 2007-02-12 at 17:35 -0500, Dmitry Torokhov wrote:
> Hi Jeremy,
> 
> On 2/10/07, Roberson, Jeremy <[email protected]> wrote:
> > Here is my concern.  If the HID layer is fixed to support Digitizers
> > which means we would no longer need separate drivers, then how are
> > we(Digitizer manufacturers) supposed to get the digitizer input before
> > the X Mouse driver takes it?  Please forgive my ignorance, but I'm still
> > learning.
> >
> 
> Do you mean "how my X driver can consume all events without levaing
> anything to the default X mouse driver feeding off /dev/input/mice"?
> Well, mousedev multiplexor is evil and as soon as X drivers start
> support hotplugging of input devices we will kill it. But for now your
> X digitizer driver can do EVIOCGRAB ioctl ensuring that it will be the
> only recepient of events produced by the device in question.
> 
> Does this answer your question?
> 
-- 
Jeremy Roberson
Software Engineer
GTCO CalComp

"Do not go gentle into that good night,
Old age should burn and rave at the 
close of the day; Rage, rage against the
dying of the light."
- Dylan Thomas



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