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bartec-rnerella/cdc-ecm-ethernet-device.sh

Forked from eballetbo/cdc-ecm-ethernet-device.sh
Created March 9, 2020 12:30
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  1. @eballetbo eballetbo created this gist Jul 13, 2018.
    31 changes: 31 additions & 0 deletions cdc-ecm-ethernet-device.sh
    View file
    Original file line number Diff line number Diff line change
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    #!/usr/bin/env bash

    # mount configfs
    mount -t configfs none /sys/kernel/config
    # load libcomposite module
    modprobe libcomposite
    # create a gadget
    mkdir /sys/kernel/config/usb_gadget/g1
    # cd to its configfs node
    cd /sys/kernel/config/usb_gadget/g1
    # configure it (vid/pid can be anything if USB Class is used for driver compat)
    echo 0xabcd > idVendor
    echo 0x1234 > idProduct
    # configure its serial/mfg/product
    mkdir strings/0x409
    echo myserial > strings/0x409/serialnumber
    echo mymfg > strings/0x409/manufacturer
    echo myproduct > strings/0x409/product
    # create a config
    mkdir configs/c.1
    # configure it with attributes if needed
    echo 120 > configs/c.1/MaxPower
    # ensure function is loaded
    modprobe usb_f_ecm
    # create the function (name must match a usb_f_<name> module such as 'ecm')
    mkdir functions/ecm.0
    # associate function with config
    ln -s functions/ecm.0 configs/c.1
    # enable gadget by binding it to a UDC from /sys/class/udc
    echo 0000:01:00.0 > UDC
    # to unbind it: echo "" UDC; sleep 1; rm -rf /sys/kernel/config/usb_gadget/g1