[U-Boot] dfu: bConfigurationValue=2 makes download from windows fail

Lukasz Majewski l.majewski at samsung.com
Thu Jul 25 17:01:11 CEST 2013


On Thu, 25 Jul 2013 14:41:02 +0000 Egli, Samuel samuel.egli at siemens.com
wrote,
> Hi Lukasz,
> 
> >-----Original Message-----
> >From: Lukasz Majewski [mailto:l.majewski at samsung.com]
> >Sent: Donnerstag, 25. Juli 2013 16:03
> >To: Egli, Samuel
> >Cc: Heiko Schocher; Wolfgang Denk; Bach, Pascal; Meier, Roger; u-
> >boot at lists.denx.de; Tormod Volden
> >Subject: Re: dfu: bConfigurationValue=2 makes download from windows
> >fail
> >
> >On Thu, 25 Jul 2013 12:29:01 +0000 Egli, Samuel
> >samuel.egli at siemens.com wrote,
> >
> >Hi Samuel,
> >
> >Thanks for very detailed bug/problem report.
> >
> your welcome.
> >[...]
> >
> >
> >From the very short glimpse, I can suspect that this was set to 2
> >because of two supported functions (dfu and USB mass storage) at the
> >g_dnl gadget.
> >
> 
> Ok, but then bNumConfigurations would be set to 2 as well?
> >However this needs more investigation. I will delve into the code and
> >reply tomorrow with more details.
> >
> 
> Ok.
> >> In a
> >> previous dfu implementation in U-Boot (v2011.09)
> >> bConfigurationValue was set to 1.
> >
> >I've checked out to v2011.09 u-boot and as fair as I see DFU was not
> >implemented (in the mainline) then.
> >
> >The first posted by me dfu implementation was at
> >http://article.gmane.org/gmane.comp.boot-loaders.u-
> >boot/129318/match=dfu+usb
> >
> >Am I missing something? Do you use some older patch, which is
> >unknown to me?
> 
> Sorry. No, I wasn't very clear. We used U-Boot based on 
> 2011.09_AM335xPSP_04.06.00.08 from arago-project. But know I cannot 
> find the patches on arago-project.org. If you want I can provide
> these patches to you. But, we're sticking now to v2013.07 anyway.

I think, that we shall focus now at newest u-boot (v2013.07).

> >[...]
> 
> Best
>  Sam



-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group


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