omap udc driver problem with beagle board

omap udc driver problem with beagle board

[Marco Stornelli]

Hi,

I'm using the kernel 2.6.34 with the beagle board rev. c4. I have got
some problems with the ethernet gadget to use nfs over usb. The problem
is with the usb. When the g_ether driver register itself, the omap udc
driver returns ENODEV because the kernel didn't call the probe for
this driver. Looking at the code, it seems the problem is in board
specific management of the usb. There isn't the registration of the
platform device to match the omap udc platform driver. It should be done
in the omap_usb_init() but in case of beagle board this function is
never called, so omap udc driver cannot work. Is it a regression? Is
there any workaround?

Thanks.

Regards,

Marco
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Re: omap udc driver problem with beagle board

[Felipe Balbi]

On Sun, May 30, 2010 at 11:53:49AM +0200, Marco Stornelli wrote:
> Hi,
> 
> I'm using the kernel 2.6.34 with the beagle board rev. c4. I have got
> some problems with the ethernet gadget to use nfs over usb. The problem
> is with the usb. When the g_ether driver register itself, the omap udc
> driver returns ENODEV because the kernel didn't call the probe for
> this driver. Looking at the code, it seems the problem is in board
> specific management of the usb. There isn't the registration of the
> platform device to match the omap udc platform driver. It should be done
> in the omap_usb_init() but in case of beagle board this function is
> never called, so omap udc driver cannot work. Is it a regression? Is
> there any workaround?

beagle board uses musb. You shouldn't be relying on the udc controller.
Your Kconfig is just wrong.

-- 
balbi

Re: omap udc driver problem with beagle board

[Marco Stornelli]

2010/5/30 Felipe Balbi <me@felipebalbi.com>:
> On Sun, May 30, 2010 at 11:53:49AM +0200, Marco Stornelli wrote:
>
> beagle board uses musb. You shouldn't be relying on the udc controller.
> Your Kconfig is just wrong.
>
> --
> balbi
>

Mmm....does it mean that it's not possible to use g_ether driver? I
read in several docs/wiki that it's possible.

Marco

Re: omap udc driver problem with beagle board

[Marco Stornelli]

2010/5/30 Felipe Balbi <me@felipebalbi.com>:
> On Sun, May 30, 2010 at 11:53:49AM +0200, Marco Stornelli wrote:
> beagle board uses musb. You shouldn't be relying on the udc controller.
> Your Kconfig is just wrong.
>
> --
> balbi
>

Oops, my fault. I see the error in the configuration. Thank you very
much for your response. I'll try again.

Regards,

Marco

Re: omap udc driver problem with beagle board

[Felipe Balbi]

On Mon, May 31, 2010 at 09:06:35AM +0200, ext Marco Stornelli wrote:
>Oops, my fault. I see the error in the configuration. Thank you very
>much for your response. I'll try again.

no problem.

-- 
balbi

DefectiveByDesign.org
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