USB UHCI driver and controller quirks

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02-18-2008, 06:48 AM

Alan Stern

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USB UHCI driver and controller quirks

I know nothing about OpenBSD, but I hope someone can give me some
information (or point out where to look) about the USB UHCI host
controller driver.

In particular, I'd like to know how it copes with the differences and
quirks of various manufacturers' controllers. A few items of interest:

How is Intel's non-standard implementation of the Over Current
port status bits managed?

What about VIA's implementation of those same bits, done
differently from Intel's?

Does the driver cope with the Intel erratum that causes a port
with the Over Current input set to signal a Resume Detect?

How does the driver handle VIA controllers that shut themselves
down when they receive a babble packet?

Thanks for any help...

Alan Stern

« Re: routing problems | Re: USB UHCI driver and controller quirks »

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USB UHCI driver and controller quirks