From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brownell Subject: Re: [Question] Always got STALL in MUSB Host driver Date: Sun, 18 Nov 2007 22:34:15 -0800 Message-ID: <200711182234.16066.david-b@pacbell.net> References: <1195123737.3698.24.camel@roc-desktop> <200711151043.46220.david-b@pacbell.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-omap-open-source-bounces@linux.omap.com Errors-To: linux-omap-open-source-bounces@linux.omap.com To: Nazim Khan Cc: linux-omap-open-source@linux.omap.com List-Id: linux-omap@vger.kernel.org On Sunday 18 November 2007, Nazim Khan wrote: > Hi Dave, > > Was that in DMA mode or PIO Mode? Probably PIO, since that's usually the first stage of debugging given a choice of modes. I vaguely recall it was one of those two modes, but don't recall which one. If it was DMA, I sure don't recall which of the several DMA engine wass involved. ;) - Dave > regards, > Nazim > > On Nov 16, 2007 12:13 AM, David Brownell wrote: > > On Thursday 15 November 2007, Tony Lindgren wrote: > > > Hmm, I never got double buffering to reliably work on tusb as far as I > > > remember. I guess Dave got it working on DaVinci, so maybe he has some > > > pointers. > > > > It's been some time since I tried that. What I vaguely recall > > is that it worked on the peripheral side, but on the host side > > there was a issue if for example both sides (tx, rx) of a given > > FIFO tried to do things at the same time. > > > > The driver code has improved a lot since I saw those failures, > > so I wouldn't trust those memories to indicate anything specific > > about current behavior. > > > > - Dave > > >