i.MX ProcessorsのトピックRe: g_ether gadget on more USB

g_ether gadget on more USB

sergio_dorazio — Tue, 17 Dec 2019 15:49:36 GMT

Hi ,

I have a custom IMX6ULL board with 2 USB OTG and Yocto LINUX operative system,

I have connected the USB0 to PC1 and work with g_ether gadget, it work well.

I want connect the USB1 to PC2 and work with g_ether gadget, how can I select the USB device ?

I know only the command " modprobe g_ether " without parameters !!!

Have someone expert on this argument ?

Must I duplicate g_ether.ko module ?

Have someone any suggestion ?

Sergio D'Orazio.

Re: g_ether gadget on more USB

sergio_dorazio — Thu, 19 Dec 2019 09:22:14 GMT

Hello,

I add a news about this problem:

if I do this command " modprobe g_ether " , the system load the ethernet gadget on physical USB1, and it works.

if I do these command " modprobe g_serial " and then " modprobe g_ether " , the system load the serial gadget on physical USB1 and ethernet gadget on physical USB2, and they work.

Do someone know how load 2 ethernet gadget , one on USB1 and one on USB2 ?

Is it possible or not ?

Have someone any suggestion ?

Sergio D'Orazio.

Re: g_ether gadget on more USB

jimmychan — Tue, 24 Dec 2019 06:32:52 GMT

I am thinking you may modify the driver g_ether that can add an input parameter for selecting the physical usb. e.g. insmod g_ether.ko usb1

Re: g_ether gadget on more USB

Sasamy — Thu, 26 Dec 2019 09:49:48 GMT

Hello,

You can use a dynamic configuration instead of a static one

https://www.kernel.org/doc/html/latest/usb/gadget_configfs.html?highlight=configfs

https://www.collabora.com/news-and-blog/blog/2019/02/18/modern-usb-gadget-on-linux-and-how-to-integrate-it-with-systemd-part-1/