linux-kernel - Re: EHCI debug documentation

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Message-ID: <m1bpshx912.fsf@fess.ebiederm.org>
Date:	Wed, 04 Mar 2009 13:39:21 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Greg KH <gregkh@...e.de>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Sarah Sharp <sarah.a.sharp@...el.com>,
	linux-usb@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: EHCI debug documentation

Greg KH <gregkh@...e.de> writes:

> * Randy Dunlap <randy.dunlap@...cle.com> wrote:
>> Yinghai Lu wrote:
>> > b. netchip USB debug cable
>> 
>> http://www.plxtech.com/products/NET2000/NET20DC/default.asp
>
> I have reports that the newer version of this device does not work on
> Linux as it isn't enumeratable as a "real" usb device on one end.
>
> I don't have one of these new devices yet to test it out, has anyone
> else heard of this problem?

With the first generation of devices I remember they were peculiar and
finicky.  I don't recall the exact details but I remember the devices
able to get into weird states that may resemble what you describe.

Eric
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