Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 1 | #!/bin/bash |
| 2 | # Copyright 2021 Google LLC |
| 3 | # |
| 4 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | # you may not use this file except in compliance with the License. |
| 6 | # You may obtain a copy of the License at |
| 7 | # |
| 8 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | # |
| 10 | # Unless required by applicable law or agreed to in writing, software |
| 11 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | # See the License for the specific language governing permissions and |
| 14 | # limitations under the License. |
| 15 | |
| 16 | |
| 17 | # List of options the script accepts. Trailing column means that the option |
| 18 | # requires an argument. |
| 19 | ARGUMENT_LIST=( |
| 20 | "help" |
| 21 | "product-id:" |
| 22 | "product-name:" |
| 23 | "host-mac:" |
| 24 | "bind-device:" |
| 25 | "dev-mac:" |
| 26 | "gadget-dir-name:" |
| 27 | "iface-name:" |
| 28 | ) |
| 29 | |
| 30 | print_usage() { |
| 31 | cat <<HELP |
| 32 | $0 [OPTIONS] [stop|start] |
| 33 | Create USB Gadget Configuration |
| 34 | --product-id USB Product Id for the gadget. |
| 35 | --product-name Product name string (en) for the gadget. |
| 36 | --host-mac MAC address of the host part of the connection. Optional. |
| 37 | --dev-mac MAC address of the device (gadget) part of the connection. Optional. |
| 38 | --bind-device Name of the device to bind, as listed in /sys/class/udc/ |
| 39 | --gadget-dir-name Optional base name for gadget directory. Default: "g1" |
| 40 | --iface-name Optional name of the network interface. Default: "usb0" |
| 41 | --help Print this help and exit. |
| 42 | HELP |
| 43 | } |
| 44 | |
| 45 | gadget_start() { |
| 46 | local gadget_dir="${CONFIGFS_HOME}/usb_gadget/${GADGET_DIR_NAME}" |
| 47 | mkdir -p "${gadget_dir}" |
| 48 | echo ${ID_VENDOR} > "${gadget_dir}/idVendor" |
| 49 | echo ${ID_PRODUCT} > "${gadget_dir}/idProduct" |
| 50 | |
| 51 | local str_en_dir="${gadget_dir}/strings/0x409" |
| 52 | mkdir -p "${str_en_dir}" |
| 53 | echo ${STR_EN_VENDOR} > "${str_en_dir}/manufacturer" |
| 54 | echo ${STR_EN_PRODUCT} > "${str_en_dir}/product" |
| 55 | |
| 56 | local config_dir="${gadget_dir}/configs/c.1" |
| 57 | mkdir -p "${config_dir}" |
| 58 | echo 100 > "${config_dir}/MaxPower" |
| 59 | mkdir -p "${config_dir}/strings/0x409" |
| 60 | echo "ECM" > "${config_dir}/strings/0x409/configuration" |
| 61 | |
| 62 | local func_dir="${gadget_dir}/functions/ecm.${IFACE_NAME}" |
| 63 | mkdir -p "${func_dir}" |
| 64 | |
| 65 | if [[ -n $HOST_MAC_ADDR ]]; then |
| 66 | echo ${HOST_MAC_ADDR} > ${func_dir}/host_addr |
| 67 | fi |
| 68 | |
| 69 | if [[ -n $DEV_MAC_ADDR ]]; then |
| 70 | echo ${DEV_MAC_ADDR} > ${func_dir}/dev_addr |
| 71 | fi |
| 72 | |
| 73 | ln -s "${func_dir}" "${config_dir}" |
| 74 | |
| 75 | echo "${BIND_DEVICE}" > ${gadget_dir}/UDC |
| 76 | } |
| 77 | |
| 78 | gadget_stop() { |
| 79 | local gadget_dir="${CONFIGFS_HOME}/usb_gadget/${GADGET_DIR_NAME}" |
| 80 | rm -f ${gadget_dir}/configs/c.1/ecm.${IFACE_NAME} |
| 81 | rm -rf ${gadget_dir}/configs/c.1/strings/0x409 |
| 82 | rm -rf ${gadget_dir}/configs/c.1 |
| 83 | rm -rf ${gadget_dir}/strings/0x409 |
| 84 | rm -rf ${gadget_dir}/functions/ecm.${IFACE_NAME} |
| 85 | rm -rf ${gadget_dir} |
| 86 | } |
| 87 | |
| 88 | opts=$(getopt \ |
| 89 | --longoptions "$(printf "%s," "${ARGUMENT_LIST[@]}")" \ |
| 90 | --name "$(basename "$0")" \ |
| 91 | --options "" \ |
| 92 | -- "$@" |
| 93 | ) |
| 94 | |
| 95 | eval set --$opts |
| 96 | |
| 97 | CONFIGFS_HOME=${CONFIGFS_HOME:-/sys/kernel/config} |
| 98 | ID_VENDOR="0x18d1" # Google |
| 99 | ID_PRODUCT="" |
| 100 | STR_EN_VENDOR="Google" |
| 101 | STR_EN_PRODUCT="" |
| 102 | DEV_MAC_ADDR="" |
| 103 | HOST_MAC_ADDR="" |
| 104 | BIND_DEVICE="" |
| 105 | ACTION="start" |
| 106 | GADGET_DIR_NAME="g1" |
| 107 | IFACE_NAME="usb0" |
| 108 | while [[ $# -gt 0 ]]; do |
| 109 | case "$1" in |
| 110 | --product-id) |
| 111 | ID_PRODUCT=$2 |
| 112 | shift 2 |
| 113 | ;; |
| 114 | --product-name) |
| 115 | STR_EN_PRODUCT=$2 |
| 116 | shift 2 |
| 117 | ;; |
| 118 | --host-mac) |
| 119 | HOST_MAC_ADDR=$2 |
| 120 | shift 2 |
| 121 | ;; |
| 122 | --dev-mac) |
| 123 | DEV_MAC_ADDR=$2 |
| 124 | shift 2 |
| 125 | ;; |
| 126 | --bind-device) |
| 127 | BIND_DEVICE=$2 |
| 128 | shift 2 |
| 129 | ;; |
| 130 | --gadget-dir-name) |
| 131 | GADGET_DIR_NAME=$2 |
| 132 | shift 2 |
| 133 | ;; |
| 134 | --iface-name) |
| 135 | IFACE_NAME=$2 |
| 136 | shift 2 |
| 137 | ;; |
| 138 | --help) |
| 139 | print_usage |
| 140 | exit 0 |
| 141 | ;; |
| 142 | start) |
| 143 | ACTION="start" |
| 144 | shift 1 |
| 145 | break |
| 146 | ;; |
| 147 | stop) |
| 148 | ACTION="stop" |
| 149 | shift 1 |
| 150 | break |
| 151 | ;; |
| 152 | --) |
| 153 | shift 1 |
| 154 | ;; |
| 155 | *) |
| 156 | break |
| 157 | ;; |
| 158 | esac |
| 159 | done |
| 160 | |
| 161 | if [[ $ACTION == "stop" ]]; then |
| 162 | gadget_stop |
| 163 | else |
| 164 | gadget_start |
| 165 | fi |