[coreboot] EHCI Debug Gadget
Kyösti Mälkki
kyosti.malkki at gmail.com
Thu Oct 17 17:35:49 CEST 2013
On 17.10.2013 17:45, John Lewis wrote:
> Hey Guys,
>
> I'm trying to setup a Beaglebone Black as the subject. I've followed the
> instructions and I get lots of this when I try to make it do it's thang:
>
> [ 3142.831914] CAUTION: musb: Babble Interrupt Occurred
> [ 3143.107609] gadget: setup: failure req 9 v 1
> [ 3143.289034] CAUTION: musb: Babble Interrupt Occurred
> [ 3143.289088] gadget: disconnected
> [ 3143.564615] gadget: setup: failure req 9 v 1
> [ 3143.746013] CAUTION: musb: Babble Interrupt Occurred
> [ 3143.746058] gadget: disconnected
> [ 3144.021599] gadget: setup: failure req 9 v 1
> [ 3144.264994] CAUTION: musb: Babble Interrupt Occurred
> [ 3144.265038] gadget: disconnected
> [ 3144.540802] gadget: setup: failure req 9 v 1
> [ 3144.722247] CAUTION: musb: Babble Interrupt Occurred
> [ 3144.722304] gadget: disconnected
> [ 3144.997944] gadget: setup: failure req 9 v 1
> [ 3145.179357] CAUTION: musb: Babble Interrupt Occurred
> [ 3145.179415] gadget: disconnected
>
> Any pointers? Web search comes up fruitless except for references to the
> kernel source code which I don't understand. ;)
>
> Thanks,
>
> John.
>
Hi John
Apply the patches and follow the instructions here for BeagleBone Black
kernel:
http://www.coreboot.org/EHCI_Gadget_Debug
In coreboot menuconfig, the selection of usbdebug dongle 'BeagleBone' is
only for 'BeagleBone', not 'BeagleBone Black'. I better add option
for 'BeagleBone Black' to avoid the confusion. Select 'Net20DC
compatible' for now.
Also in coreboot menuconfig, under 'Debugging', enable verbose usbdebug
messaging. Of course you will need another working console to receive
those messages, CBMEM console will do if your target system is able to
reach OS.
Regards,
Kyösti
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