#!/bin/sh

set -e
GADGET_DIR=/sys/kernel/config/usb_gadget

if [ ! -d "$GADGET_DIR" ]; then
    echo "$DIRECTORY does not exist."
    exit 0
fi

if [ "$1" = "create" ]
then
    if [ -d "$GADGET_DIR/g0" ]; then
        echo "HID devices already exists"
    
        exit 0
    fi
    cd $GADGET_DIR && mkdir g0 && cd g0

    echo 0x3346 > idVendor
    echo 0x1009 > idProduct
    mkdir strings/0x409
    echo '0123456789ABCDEF' > strings/0x409/serialnumber
    echo 'rockchip' > strings/0x409/manufacturer
    echo 'rk3588' > strings/0x409/product

    mkdir configs/c.1
    echo 0xE0 > configs/c.1/bmAttributes
    echo 120 > configs/c.1/MaxPower
    mkdir configs/c.1/strings/0x409
    echo "rk3588" >  configs/c.1/strings/0x409/configuration

    # keyboard
    mkdir functions/hid.GS0
    echo 1 > functions/hid.GS0/subclass
    #echo 1 > functions/hid.GS0/wakeup_on_write
    echo 1 > functions/hid.GS0/protocol
    echo 6 > functions/hid.GS0/report_length
    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.GS0/report_desc
    ln -s functions/hid.GS0 configs/c.1

    # mouse
    mkdir functions/hid.GS1
    # echo 1 > functions/hid.GS1/subclass
    #echo 1 > functions/hid.GS1/wakeup_on_write
    echo 2 > functions/hid.GS1/protocol
    echo -ne \\x34 > functions/hid.GS1/report_length
    echo -ne \\x5\\x1\\x9\\x2\\xa1\\x1\\x9\\x1\\xa1\\x0\\x5\\x9\\x19\\x1\\x29\\x3\\x15\\x0\\x25\\x1\\x95\\x3\\x75\\x1\\x81\\x2\\x95\\x1\\x75\\x5\\x81\\x3\\x5\\x1\\x9\\x30\\x9\\x31\\x9\\x38\\x15\\x81\\x25\\x7f\\x75\\x8\\x95\\x3\\x81\\x6\\xc0\\xc0 > functions/hid.GS1/report_desc
    ln -s functions/hid.GS1 configs/c.1

    # touchpad
    mkdir functions/hid.GS2
    # echo 1 > functions/hid.GS2/subclass
    #echo 1 > functions/hid.GS2/wakeup_on_write
    echo 2 > functions/hid.GS2/protocol
    echo 6 > functions/hid.GS2/report_length
    echo -ne \\x05\\x01\\x09\\x02\\xa1\\x01\\x09\\x01\\xa1\\x00\\x05\\x09\\x19\\x01\\x29\\x03\\x15\\x00\\x25\\x01\\x95\\x03\\x75\\x01\\x81\\x02\\x95\\x01\\x75\\x05\\x81\\x01\\x05\\x01\\x09\\x30\\x09\\x31\\x15\\x00\\x26\\xff\\x7f\\x35\\x00\\x46\\xff\\x7f\\x75\\x10\\x95\\x02\\x81\\x02\\x05\\x01\\x09\\x38\\x15\\x81\\x25\\x7f\\x35\\x00\\x45\\x00\\x75\\x08\\x95\\x01\\x81\\x06\\xc0\\xc0 > functions/hid.GS2/report_desc
    ln -s functions/hid.GS2 configs/c.1

    ls /sys/class/udc/ | cat > UDC
fi

if [ "$1" = "delete" ]
then
    echo '' > $GADGET_DIR/g0/UDC
fi