[U-Boot] [PATCH] usb: fix usb start problem with SMSC USB hub and Toshiba USB stick

devzero at web.de
2010-09-22T16:03:23Z

Hello Detlev,

>> i`m spending more than half of this evening with this issue, trying to
>> find a solution and trying to provide information for a problem
>> affecting many people and which seems to exist in u-boot.
>
>Rest assured that many people on this list spend multiple days with USB
>problems :|

Ok, we know that from linux..... :(

>> so please forgive if i jumped onto the wrong thread as an entry point
>> and i helter-skelter blundered into this list. will go whine elsewhere
>> then and use obscure workarounds for this issue instead ( like that
>> guy on this thread:
>> http://openplug.org/plugforum/index.php?topic=131.0 )
>
>The guy doing a reboot when it fails? Actually not a bad strategy. It
>shows once more that USB has the tendency to be non-deterministic.

Yes, but for my setup unfortunately neither reboot (i.e. warm-boot) helps,
nor does it help to add pre-boot usb reset to the u-boot config.

>As always, it would be good to first find out if the codebase of the
>U-Boot you use is comparable to mainline (otherwise we cannot use _any_
>tests you do) and then do systematic tests to narrow down the problem.

See my other posting.

>It may well be that USB has been tested better in U-Boot context with
>USB sticks (solid state) rather than mechainically spinning hard disks.
>Maybe this is something which needs to be taken into account in the
>code.
That`s a good theory.
btw, iirc, i saw some hint that the code (usb-storage.c !?) that it had only
been well tested with flash media.

Anyway, just to tell about the background:
I`m trying to replace my home server with a Dockstar. As this runs 24/7
i want something energy-efficient for that.
I got some Dockstars for so cheap and they are asbolute fantastic and
just perfect fit to be run with debian. I plan buying a solid state sata disk
with sata2usb one day, but seeing two ordinary disks with 2 different ide2usb
fail does not encourage me to spend bucks on something new. I want a robust
system where i can use more than "some" drives which are just compatible by
chance. From what i have tested, the debian install on dockstar runs pretty well,
stable and fast.

regards
Roland
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