Date: Fri, 14 May 2004 17:34:52 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: mark <mark@node.to> Cc: freebsd-hackers@freebsd.org Subject: Re: usb probs ehci works vs uhci hangs with Linksys usb200M ( axe0 ) Message-ID: <20040514153451.GL70900@cicely12.cicely.de> In-Reply-To: <20040514034223.U6244@mister.mcgoonet.com> References: <20040514034223.U6244@mister.mcgoonet.com>
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On Fri, May 14, 2004 at 03:59:27AM +0000, mark wrote: > > > > I'm looking for a work around to this usb ethernet problem. > > > With FreeBSD-5.2.1-p5, "device ehci" added to the default GENERIC kernel, > the axe device works fine in USB 2.0 mode, when plugged in after boot > (AFTER ehci driver is loaded)B. > > > However, without ehci, uhci tries to attach the device and hangs with > "read PHY failed". If booted with device plugged, boot stops. If device is > plugged in after boot, the axe module hangs, looping forever on the read > error (you can unplug the device but usb never deregisters it) but the > system remains useable. > > > If the system has ehci enabled, and is booted with the device plugged in, > it hangs when uhci module is loaded because it begins immediate probe > before ehci is loaded. Thus it is impossible to boot the system in any > config with the device plugged in at boot. > > > Is there any way to disable USB autoprobing, to send a signal or something > to tell it when to start probing. Alternatively, is there a way to prevent > USB probing until all USB controllers are loaded (specifically, the ehci > module)? You can set the #if 1 to 0 in usb.c to delay probing as a workaround. Unfortunately this may cause troubles if you have USB devices that are needed sonner. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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