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Date: Fri, 26 Jun 2009 21:32:43 +0200
From: Christoph Langguth <christoph@rosenkeller.org>
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Cc: Rui Paulo <rpaulo@freebsd.org>
Subject: Re: How to add support for Macbook Pro (USB) keyboard?
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Hans Petter Selasky schrieb:
> Hi Christoph!
> 
> Rui Paulo has an additional patch for ukbd.c. Can you look at it and verify?
> 
> --HPS
> 
> <cite>
> 
> Here's how it worked:
> http://wiki.freebsd.org/AppleMacbook#head-7eab3730c3bf3d04bdfb0d1d3649eaddf2fed595
> 
> If there's any problem with the userland approach, I would like to know.
> If there isn't, please consider removing the kenrel support for the  
> eject key.
> 
> </cite>
> 


I have looked inside this a bit deeper. While the usbhidctl approach 
doesn't really work for this keyboard at the moment, here are my 
observations:

- the keyboard is only handled by *either* ukbd *or* uhid. In fact, if 
unpatched, uhid will not even try to consider the device because of the 
following code inside uhid.c's uhid_probe() function:

         if (uaa->use_generic == 0) {
                 /* give Mouse and Keyboard drivers a try first */
               return (ENXIO);
         }

That means that the keyboard always ends up as device ukbdX, and never 
as uhidY.

Before even trying to get it to work using uhid, I think this is the 
issue that needs to be sorted out: Can a device be handled by *two* 
independent drivers at once?
- If so, how?
- If not, what could a possible solution be?

Thanks & cheers,
Chris