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List:       linux1394-devel
Subject:    Re: OHCI GUIDs via module parameters
From:       Stephan Gatzka <stephan () gatzka ! org>
Date:       2012-08-01 17:48:33
Message-ID: 50196BF1.1050907 () gatzka ! org
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Hello Clemens,

many thanks for your comments, that pushed me into a good direction.
>> To get the GUIDs into the OHCI we patched the OHCI driver to support
>> a module parameter with a list of GUIDs to use.
>
> There's nothing about this in the OHCI spec; this is very hardware
> dependent and won't work with other controller chips.  (Out of
> curiousity: which controller are you using?)

Mainly TI TSB82AA2B.

> The only requirement for this function is that it is done before the
> actual driver initialization, so it doesn't need to be in the OHCI
> driver itself.
>
Yep, and that is exactly how I will to it. Just before loading the ohci 
driver we initialize the GUIDlo and GUIDHi registers. This could easily 
done using /sys/devices/pcixxxx:xx/xxxx:xx:xx.x/resource0

So a small user space program is all I need and no change in the ohci 
driver is required.

Thanks again for the hint.

Regards,

Stephan


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