From: "Richard D" <richard@embunus.com>
To: "'Bryan Wu'" <cooloney.lkml@gmail.com>,
"'David Brownell'" <david-b@pacbell.net>
Cc: "'Robin Getz'" <rgetz@blackfin.uclinux.org>,
<linux-usb-devel@lists.sourceforge.net>, <gregkh@suse.de>,
<linux-kernel@vger.kernel.org>
Subject: RE: [linux-usb-devel] [PATCH] : Allow embedded developers USB options normally reserved for OTG
Date: Thu, 3 Jan 2008 22:34:06 +0530 [thread overview]
Message-ID: <001c01c84e2a$ad3bceb0$07b36c10$@com> (raw)
In-Reply-To: <386072610801030005g7408f333m935c665c82d3412a@mail.gmail.com>
Does all USB Host controller hardware have the ability to disable PING?
> > > 2. Do you remember the PING issue I reported in OMAP list? How do
> you
> > > think of that?
> >
> > Yes, something needs to be done. EHCI might benefit from the same
> > kind of patch, to cope with ill-behaved usb thumb drives.
> >
> >
> > > > I have an idea: the USB_NAKLIMIT0 should be set to some value,
> when we
> > > > got NAK timeout interrupt, we can disable PING. When enumerating
> normal
> > > > USB stick, there is no NAK timeout, because PING is efficient for
> > > > handshaking. While problem USB stick will generate NAK timeout
> > > > interrupt, we disable PING for this kind of USB device
> enumeration.
next prev parent reply other threads:[~2008-01-03 17:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-02 14:48 [PATCH] : Allow embedded developers USB options normally reserved for OTG Robin Getz
2008-01-02 18:47 ` [linux-usb-devel] " David Brownell
2008-01-02 18:57 ` Felipe Balbi
2008-01-02 19:14 ` David Brownell
2008-01-02 18:58 ` Mike Frysinger
2008-01-02 19:16 ` David Brownell
2008-01-02 19:46 ` Alan Stern
2008-01-02 20:25 ` David Brownell
2008-01-02 20:58 ` Alan Stern
2008-01-03 3:50 ` David Brownell
2008-01-03 3:52 ` Bryan Wu
2008-01-03 17:01 ` Richard D
2008-01-03 3:03 ` Robin Getz
2008-01-03 3:43 ` David Brownell
2008-01-03 4:40 ` Bryan Wu
2008-01-03 7:36 ` David Brownell
2008-01-03 8:05 ` Bryan Wu
2008-01-03 17:04 ` Richard D [this message]
2008-01-04 1:20 ` Robin Getz
2008-01-03 7:58 ` Robin Getz
2008-01-03 3:47 ` Bryan Wu
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