create-hid-keyboard.sh

#!/bin/sh -x

FW_DIR=`dirname $0`
CURRENT_DIR=`pwd`

# FIXME
# check that dwc2 is already enabled
# dtoverlay dwc2
# modprobe dwc2
modprobe libcomposite
cd /sys/kernel/config/usb_gadget/
mkdir -p g1
cd g1
echo 0x1d6b > idVendor # Linux Foundation
echo 0x0104 > idProduct # Multifunction Composite Gadget
echo 0x0100 > bcdDevice # v1.0.0
echo 0x0200 > bcdUSB # USB2
mkdir -p strings/0x409
echo "fedcba9876543210" > strings/0x409/serialnumber
echo "hadess.net" > strings/0x409/manufacturer
echo "Fake Keyboard" > strings/0x409/product
N="usb0"
mkdir -p functions/hid.$N
echo 1 > functions/hid.usb0/protocol
echo 1 > functions/hid.usb0/subclass
echo 8 > functions/hid.usb0/report_length
# Descriptor from https://github.com/qlyoung/keyboard-gadget/
# FIXME Couldn't get another descriptor to work
cat "$CURRENT_DIR/$FW_DIR/keyboard-descriptor.bin" > functions/hid.usb0/report_desc
# echo -ne \\x05\\x01\\x09\\x06\\xa1\\x01\\x05\\x07\\x19\\xe0\\x29\\xe7\\x15\\x00\\x25\\x01\\x75\\x01\\x95\\x08\\x81\\x02\\x95\\x01\\x75\\x08\\x81\\x03\\x95\\x05\\x75\\x01\\x05\\x08\\x19\\x01\\x29\\x05\\x91\\x02\\x95\\x01\\x75\\x03\\x91\\x03\\x95\\x06\\x75\\x08\\x15\\x00\\x25\\x65\\x05\\x07\\x19\\x00\\x29\\x65\\x81\\x00\\xc0 > functions/hid.usb0/report_desc
C=1
mkdir -p configs/c.$C/strings/0x409
echo "Config $C: HID device" > configs/c.$C/strings/0x409/configuration
echo 250 > configs/c.$C/MaxPower
ln -s functions/hid.$N configs/c.$C/
ls /sys/class/udc > UDC