Re: Problem with BF531 and ISP1362 (linux

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On Tue, 2007-10-09 at 11:40 -0400, Alan Stern wrote:
> On Tue, 9 Oct 2007, Patrik Johansson wrote:
> > Hi,
> > 
> > I have a board with a BF531 and a ISP1362. I'm getting timouts when
> > doing device enumeration on certail devices. Most devices work fine, but
> > I have a couple who times out when asking for string descriptors, and
> > now one device that times out on SET_ADDRESS. I was able to get the
> > devices that times out on string descriptors to work by disabling some
> > code in drivers/usb/core/hub.c
> > 
> > I welcome any ideas and pointers towards fixing this issue. What
> > information can I provide to help solve this? 
> > 
> > Btw, the device works perfectly on my desktop computer.
> > 
> > One weird "coincidence" is that all the devices where asking for string
> > descriptors results in timeouts are devices using the MTP protocol (some
> > of the support normal USB-storage as well).  The device that times out
> > on SET_ADDRESS is a Muvid MP-521.
> If you can build kernels with CONFIG_USB_DEBUG set on both the board
> and the desktop computer, then there might be some useful information
> in the dmesg logs of the two machines.  It would at least be 
> interesting to compare them.
> Alan Stern

At the moment I don't have access to the machines in question (it's a
clients hardware). But I did get some logs with some of the
debugging in isp1362-hcd.c set. I have two logs, one for a working
device and one for a non-working. I can't seem to be able to attach them
(I tried earlier but the mail just bounced saying it was filtered out). is a log from a Cowon D2, a
working device. is a log from the Muvid MP-521.

>From what i can tell from the logs, there's supposed to be an
interrupt where there is a khubd error "usb 1-2: khubd timed out on
ep0out len=0/0". That's the confusing bit, it works fine with so many
other devices. I tried increasing the timeout (it was 5 seconds) to
50, but still no interrupt.

I'll try getting the logs you asked for from the client as soon as

/Patrik Johansson

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