linux-kernel - Re: OHCI root_port_reset() deadly loop...

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Message-Id: <20071009184850.33F8D236A37@adsl-69-226-248-13.dsl.pltn13.pacbell.net>
Date:	Tue, 09 Oct 2007 11:48:51 -0700
From:	David Brownell <david-b@...bell.net>
To:	benh@...nel.crashing.org
Cc:	linux-usb-users@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, greg@...ah.com, davem@...emloft.net
Subject: Re: OHCI root_port_reset() deadly loop...

> > Assuming PCI is present, /sys/bus/pci/devices/*/class can tell
> > if EHCI is present (0x0c0320) ... if so, load that driver.
> > Then repeat for OHCI (0x0c0310) and UHCI (0x0c0300).
>
> That will not work for all of the non-PCI implementations though.

Oddly enough, that's why I said "assuming PCI is present".  ;)

Anything using the ARC/TDI RTL doesn't have this issue ... it
includes full/low speed support directly, without a companion
controller.  That covers the Freescale silicon and some others.
For a long time I think that was the only generally available
non-PCI implementation.

But you're right that there are (now) a few other cases.
In-tree right now are also the Au1200, ps3, and 440epx.

- Dave

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