[meta-intel] g_ether functionality for Intel E3845 CPU (valley-island, bay-trail)

[Tan, Jui Nee]

Hi,

Please follow Sumo build procedure that built against Poky (Yocto Project Reference Distro) 2.5.1 meta-intel 9.1 linux-intel 4.14 and add following configurations:

• Create file meta-intel/recipes-kernel/linux/linux-intel/usb.cfg and add below kernel configs to file usb.cfg:
CONFIG_USB_GADGET=y
CONFIG_NOP_USB_XCEIV=y
CONFIG_ETHER_GADGET=m
CONFIG_USB_DWC3=y
# CONFIG_USB_DWC3_HOST is not set (Gadget only!)
CONFIG_USB_DWC3_GADGET=y
CONFIG_USB_DWC3_PCI=m

• To include file "usb.cfg", add below line to kernel recipe file meta-intel/common/recipes-kernel/linux/linux-intel_4.14.bb
   SRC_URI_append = " file://usb.cfg<file:///\\usb.cfg>"

After adding above configurations successfully, build the image and boot it.

Finally, run following command on terminal:

1.       modprobe g_ether

2.       lsmod –  after modprobe g_ether, you will find g_ether in the list.

3.       Ifconfig – you can see usb0 interface now.

Thanks,
Juinee

From: meta-intel-bounces at yoctoproject.org [mailto:meta-intel-bounces at yoctoproject.org] On Behalf Of Henrik Haugaard Jensen
Sent: Wednesday, October 31, 2018 7:48 PM
To: meta-intel at yoctoproject.org
Subject: [meta-intel] g_ether functionality for Intel E3845 CPU (valley-island, bay-trail)

We have successfully used meta-intel jethro branch for our device based on an intel E3845 CPU.

Now we need to upgrade to a newer Linux kernel to get full camera/video/media support. But when building new BSP with sumo it turns out that g_ether usb gadget driver is not working neither with linux-intel 4.9 or 4.14.

My related kernel configs ( which works for meta-intel Jethro) are:
CONFIG_USB_GADGET=y
CONFIG_NOP_USB_XCEIV=y
CONFIG_ETHER_GADGET=m
CONFIG_USB_DWC3=y
# CONFIG_USB_DWC3_HOST is not set (Gadget only!)
CONFIG_USB_DWC3_GADGET=y
CONFIG_USB_DWC3_PCI=m

The error I get is :
udc-core: couldn't find an available UDC - added [g_ether] to list of pending drivers

and the usb0 network interface does not show up.

What am I missing?

Best Regards
Henrik

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.yoctoproject.org/pipermail/meta-intel/attachments/20181123/ebf5545f/attachment.html>