Network over USB in beaglebone

[Fariya Fatima]

Hi,

I am using TI SDK for a variant of beaglebone black. The TI SDK requires drivers to be installed on the Windows PC to be able to get network over USB access. This is something which is unacceptable to our customer. 

I have noticed that when I try latest available Debian image on Beagelbone black, there is no need to install a Win driver to enable network over USB connection. I am unsure where the fix is in Debian (kernel or rootfs or both)? I intend to incorporate this fix in my TI SDK code-base. Can someone help me where the fix for the network over USB issue is present so I could incorporate into my code?

Eagerly waiting for solutions.

Regards,

Fariya

[Robert Nelson]

The TI SDK just uses g_multi, we use libcomposite/usb-configfs to
create the usb device. BTW.. Microsoft likes to break it on every
release, so here be dragons..

The magic is here:

https://github.com/RobertCNelson/boot-scripts/blob/master/boot/am335x_evm.sh#L482-L593

it's highly configurable, but you can rip parts out you don't need..
But order does matter..

Regards,

--
Robert Nelson
https://rcn-ee.com/

[Fariya Fatima]

Thanks. Does this mean I need to uninstall g_multi?

I did find this script but when I do a 

echo musb-hdrc.0.auto > UDC (binding to UDC), I get failure device or resource busy

Unsure what the issue is. Could you please help?

[Robert Nelson]

Correct, only one gadget driver can be loaded.. the default g_multi, or this custom composite one.

--
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[Fariya Fatima]

Thanks so much. I have been badly stuck up on this.
The link at https://gist.github.com/geekman/5bdb5abdc9ec6ac91d5646de0c0c60c4 also seems to be doing the same. Do you mind having a look and verifying if it looks ok?

Any specific kernel configuration that needs to go along with the script? Please help with which drivers need to be loaded before this script runs

Thanks

[Fariya Fatima]

Thanks Robert. I have been able to get things working. I have one doubt. Having run this script at bootup, the idea for me is to have a single gadget (with single function) to be detected on the Windows host. On Windows when I run the script similar to the one you pointed out, I see 2 entries in the device manager - USB composite device and then a RNDIS device. Considering my gadget supports only 1 function i.e RNDIS.. having it detected as a composite device is where I question if its ok. Could you help guide if its possible to just have RNDIS device entry without the USB composite device entry in the device manager by altering the script you provided?

Regards,

Fariya

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