tree 14e53a27c0cc08233558cda5b8818ccca1d37e70
parent ec5cf18024dd49ad224d9f6d5f6e4855a6cc6285
author Lei YU <yulei.sh@bytedance.com> 1590635555 +0800
committer Lei YU <yulei.sh@bytedance.com> 1591167353 +0800

usb-ctrl: Support ecm device

Enhance this script to support insert/eject ecm device, so that BMC
could "attach" a virtual USB ethernet between the BMC and the host.

Note that the function depends on the ECM related kernel configs.
To insert/eject ecm device:

  usb-ctrl ecm usb0 on
  usb-ctrl ecm usb0 off

Tested: Build kernel with below extra configs, and verify that
        the above commands creates/remove the USB ethernet bewteen
        BMC and host.

           +CONFIG_USB_U_ETHER=y
           +CONFIG_USB_F_ECM=y
           +CONFIG_USB_CONFIGFS_ECM=y

Signed-off-by: Lei YU <yulei.sh@bytedance.com>
Change-Id: I22796076609abaeab5c1e9e7996bcac28e7f6348