[LinuxBIOS] [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support.

David Brownell david-b at pacbell.net
Tue Dec 5 05:01:08 CET 2006

On Sunday 03 December 2006 9:09 pm, Eric W. Biederman wrote:
> My driver should be sufficient to work with any EHCI in a realatively
> clean state, and needs no special BIOS support just the hardware.
> This appears to be different than the way the windows drivers are
> using these debug devices.

I'm glad to see someone finally got progress on this ... :)

Separately, I forwarded some stuff I did last year ... maybe it'll help.
You seem to have gotten further.  Have you also observed that the
NetChip device seems to have polarity issues, such that only one
end behaves properly?

Note that this should **NOT** be specific to x86_64, since pretty
much any PCI based EHCI can do this.  I wouldn't be able to use
this on my NForce2 box, for example ...

As for EHCI registers, if this really _needs_ to live outside
of drivers/usb/host, then I'd suggest <linux/usb/ehci.h> for
the relevant declarations ... the <linux/usb/*.h> headers are
provided exactly for sharing such declaration between otherwise
unrelated parts of the tree.

- Dave

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