[U-Boot] musb: usb storage: USB device not accepting new address error

[U-Boot] musb: usb storage: USB device not accepting new address error

[Alper YILDIRIM]

I am working on a custom OMAPL138 (DA8XX) based board. On 2010.12 release
USB host mode is successfully working. But it is broken on 2011.03-rc1.

I am taking "USB device not accepting new address (errror=2)" error 
when i issue "usb start" cmd.

I analysed the problem but can not come up with a solution.

Regards.
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[U-Boot] musb: usb storage: USB device not accepting new address error

[Remy Bohmer]

Hi,

2011/3/26 Alper YILDIRIM <yildirimalper@gmail.com>:
>
> I am working on a custom OMAPL138 (DA8XX) based board. On 2010.12 release
> USB host mode is successfully working. But it is broken on 2011.03-rc1.
>
> I am taking "USB device not accepting new address (errror=2)" error
> when i issue "usb start" cmd.
>
> I analysed the problem but can not come up with a solution.

Have you tried 'git bisect' to find the offending patch already?

Kind regards,

Remy

[U-Boot] musb: usb storage: USB device not accepting new address error

[Alper YILDIRIM]

Remy Bohmer-5 wrote:
> 
> Hi,
> 
> Have you tried 'git bisect' to find the offending patch already?
> 
> 

I am not familiar with "git bisect" cmd.
I will study the usage of it and inform you afterwards. 
Thanks Remy
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[U-Boot] musb: usb storage: USB device not accepting new address error

[Alper YILDIRIM]

Hi,


Remy Bohmer-5 wrote:
> 
> 
> Have you tried 'git bisect' to find the offending patch already?
> 
> 

I found the offending patch, it is the following commit that 
makes usb broken on OMAPL138. When i revert the patch the
problem no more occurs.

3c0659b535b075be124c3d2a0714e55e65c46737
ARM: Avoid compiler optimization for readb, writeb and friends.

I am working on a proper solution.
Any help will be appreciated



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[U-Boot] musb: usb storage: USB device not accepting new address error

[Wolfgang Denk]

Dear Alper YILDIRIM,

In message <31267662.post@talk.nabble.com> you wrote:
> 
> I found the offending patch, it is the following commit that 
> makes usb broken on OMAPL138. When i revert the patch the
> problem no more occurs.
> 
> 3c0659b535b075be124c3d2a0714e55e65c46737
> ARM: Avoid compiler optimization for readb, writeb and friends.
> 
> I am working on a proper solution.
> Any help will be appreciated

This problem was fixed in a later commit. See

	commit 495df3bad9f250a36470cce15f14c36c616172b6
	Author: Wolfgang Denk <wd@denx.de>
	Date:   Fri Feb 11 12:25:48 2011 +0000

	    ARM: fix write*() I/O accessors

And if you read the comments in the related posting
(http://article.gmane.org/gmane.comp.boot-loaders.u-boot/94502) you
will also see that this explicitly mentions fixing problems in
drivers/usb/musb/musb_core.c, and why.

You could have found this by searching the archives.

Best regards,

Wolfgang Denk

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