[U-Boot-Users] isp116x-hcd and usb_storage

[tike64]

Markus and List,

I think I got it...

--- tike64 wrote:
> --- Markus Klotzbücher wrote:
> > tike64 writes:
> > > Now I don't understand how transactions can fail with 6 or 5
> > > occasionally. Are sticks known to be unreliable or should I
> > > suspect my hardware? What should be done after that kind of
> > > failure?

It seems to me now that this is hardware problem in sticks or our HW or
both. But nevertheless, failed transactions can be simply retried.

> > Can you test different sticks to see if that makes any difference?

They indeed are different. Some fail occasionally with wrong PID bits
and some with CRC errors and so on. I saw one combination of stick and
hub where I couldn't get any errors at all.

> Meanwhile, I added retries also in case of those errors. I do the
> retry with the remaining data of the transaction. Now it seems to
pass
> over the original error with a couple of retries but then fails with
8
> (data overrun) permanently ... to-be-continued-tomorrow

Retries were working properly but after that program logic error led to
the data overrun error. I fixed it and now it seems to work reliably.

I have tested it with several memory sticks (Kingston, Toshiba, SanDisk
and no-name) by repeatedly loading 165K file and comparing it each time
with an image loaded with tftpboot.

How do I proceed to upload the file (isp116x-hcd.c) for review and
public consumption?

--

Timo



       
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