84 lines
3.3 KiB
Bash
Executable File
84 lines
3.3 KiB
Bash
Executable File
#!/bin/sh
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# ConfigFS script is taken from postmarketOS
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# https://postmarketos.org
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# These are very important, it defines what is the device:
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deviceinfo_usb_idVendor="0x1F3A"
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deviceinfo_usb_idProduct="0xEFE8"
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deviceinfo_manufacturer="DanctNIX"
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deviceinfo_name="Arch Linux Mobile"
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# We'll let them know that this device is Arch ARM.
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deviceinfo_usb_serialnumber="Arch"
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setup_usb_network_configfs() {
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# See: https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt
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CONFIGFS=/sys/kernel/config/usb_gadget/
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if ! [ -e "$CONFIGFS" ]; then
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echo " $CONFIGFS does not exist, skipping configfs usb gadget"
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return
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fi
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# Default values for USB-related deviceinfo variables
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usb_idVendor="${deviceinfo_usb_idVendor:-0x18D1}" # default: Google Inc.
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usb_idProduct="${deviceinfo_usb_idProduct:-0xD001}" # default: Nexus 4 (fastboot)
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usb_serialnumber="${deviceinfo_usb_serialnumber:-postmarketOS}"
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usb_rndis_function="${deviceinfo_usb_rndis_function:-rndis.usb0}"
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echo " Setting up an USB gadget through configfs"
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# Create an usb gadet configuration
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mkdir $CONFIGFS/g1 || echo " Couldn't create $CONFIGFS/g1"
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echo "$usb_idVendor" > "$CONFIGFS/g1/idVendor"
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echo "$usb_idProduct" > "$CONFIGFS/g1/idProduct"
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# Create english (0x409) strings
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mkdir $CONFIGFS/g1/strings/0x409 || echo " Couldn't create $CONFIGFS/g1/strings/0x409"
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# shellcheck disable=SC2154
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echo "$deviceinfo_manufacturer" > "$CONFIGFS/g1/strings/0x409/manufacturer"
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echo "$usb_serialnumber" > "$CONFIGFS/g1/strings/0x409/serialnumber"
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# shellcheck disable=SC2154
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echo "$deviceinfo_name" > "$CONFIGFS/g1/strings/0x409/product"
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# Create rndis function. The function can be named differently in downstream kernels.
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mkdir $CONFIGFS/g1/functions/"$usb_rndis_function" \
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|| echo " Couldn't create $CONFIGFS/g1/functions/$usb_rndis_function"
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# https://github.com/RobertCNelson/boot-scripts/commit/714e162ba98cf3d2897e7fc95e951c6df15a7d0a
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if [ -f $CONFIGFS/g1/functions/"$usb_rndis_function"/class ]; then
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echo EF > $CONFIGFS/g1/functions/"$usb_rndis_function"/class
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echo 04 > $CONFIGFS/g1/functions/"$usb_rndis_function"/subclass
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echo 01 > $CONFIGFS/g1/functions/"$usb_rndis_function"/protocol
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fi || echo "$CONFIGFS/g1/functions/$usb_rndis_function/class not found"
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# Create configuration instance for the gadget
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mkdir $CONFIGFS/g1/configs/c.1 \
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|| echo " Couldn't create $CONFIGFS/g1/configs/c.1"
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mkdir $CONFIGFS/g1/configs/c.1/strings/0x409 \
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|| echo " Couldn't create $CONFIGFS/g1/configs/c.1/strings/0x409"
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echo "rndis" > $CONFIGFS/g1/configs/c.1/strings/0x409/configuration \
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|| echo " Couldn't write configration name"
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# Link the rndis instance to the configuration
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ln -s $CONFIGFS/g1/functions/"$usb_rndis_function" $CONFIGFS/g1/configs/c.1 \
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|| echo " Couldn't symlink $usb_rndis_function"
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# Check if there's an USB Device Controller
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if [ -z "$(ls /sys/class/udc)" ]; then
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echo " No USB Device Controller available"
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return
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fi
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# Link the gadget instance to an USB Device Controller. This activates the gadget.
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# See also: https://github.com/postmarketOS/pmbootstrap/issues/338
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# shellcheck disable=SC2005
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echo "$(ls /sys/class/udc)" > $CONFIGFS/g1/UDC || echo " Couldn't write UDC"
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}
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# And we go.
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setup_usb_network_configfs
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ip address add 10.15.19.82/24 dev usb0
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ip link set usb0 up
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