[U-Boot] [PATCH] usb: dwc2: Enhance interrupt handling for CONTROL transaction

[Marek Vasut <marex@denx.de>]

On Tuesday, January 05, 2016 at 05:16:05 PM, Marek Vasut wrote:
> On Tuesday, January 05, 2016 at 04:51:47 PM, Chin Liang See wrote:
> > On Tue, 2016-01-05 at 15:36 +0100, Marek Vasut wrote:
> > > On Tuesday, January 05, 2016 at 06:00:04 AM, Chin Liang See wrote:
> > > > Per DesignWare USB OTG databook, driver should retry up to
> > > > 3 times when transaction error (hcint.xacterr) happen. But
> > > > the 3 times doesn't count when the response is nack
> > > > (hcint.nak) or frame overrun (hcint.frmoverun)
> > > > 
> > > > This patch solved the enumeration error as spotted at socfpga
> > > > cyclone5_socdk when plugging in certain pendrive.
> > > > 
> > > > Signed-off-by: Chin Liang See <clsee@altera.com>
> > > > Cc: Marek Vasut <marex@denx.de>
> > > > Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
> > > > Cc: Dinh Nguyen <dinh.linux@gmail.com>
> > > > Cc: Pavel Machek <pavel@denx.de>
> > > > Cc: Oleksandr Tymoshenko <gonzo@bluezbox.com>
> > > > Cc: Stephen Warren <swarren@wwwdotorg.org>
> > > > Cc: Alexander Stein <alexanders83@web.de>
> > > > Cc: Peter Griffin <peter.griffin@linaro.org>
> > > 
> > > I applied this change on top of u-boot-socfpga/master and tested it
> > > on
> > > SoCFPGA CycloneV SoCDK with "Sandisk cruzer force" stick. The board
> > > gets
> > > completely stuck if I have dcache ENABLED and perform 'usb reset'.
> > > This
> > 
> > > patch is:
> > Thanks Marek for testing. I managed to find a SanDisk Cruzer Blade and
> > notice the same fail behaviours as yours. FYI, note that this patch
> > works well with other 3 pendrive that I have.
> > 
> > With SanDisk, the dwc2 driver was timed out as hcint.xfercomp and
> > chhltd never get set even after 1s. It keep retrying endlessly due to
> > miss handling for the ETIMEDOUT within this patch.
> > 
> > In short, the retry doesn't work for SanDisk but the dcache disable
> > works. Need to figure out more what cause the failure.
> 
> Excellent, I have one of those too (I bought the entire lineup of these
> sandisk sticks at one point ;-) )

Hi, any news on the SoCFPGA USB/QSPI problem investigation? Thanks!

Best regards,
Marek Vasut