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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2023 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import os
import json
import contextlib
import argparse
import time
from typing import Generator
import yaml
from ...validators.basic import valid_stripped_string_not_empty
from ... import usb
from .. import init
# =====
class _GadgetControl:
def __init__(self, meta_path: str, gadget: str, udc: str, init_delay: float) -> None:
self.__meta_path = meta_path
self.__gadget = gadget
self.__udc = udc
self.__init_delay = init_delay
@contextlib.contextmanager
def __udc_stopped(self) -> Generator[None, None, None]:
udc = usb.find_udc(self.__udc)
udc_path = usb.get_gadget_path(self.__gadget, usb.G_UDC)
with open(udc_path) as file:
enabled = bool(file.read().strip())
if enabled:
with open(udc_path, "w") as file:
file.write("\n")
try:
yield
finally:
time.sleep(self.__init_delay)
with open(udc_path, "w") as file:
file.write(udc)
def __read_metas(self) -> Generator[dict, None, None]:
for meta_name in sorted(os.listdir(self.__meta_path)):
with open(os.path.join(self.__meta_path, meta_name)) as file:
yield json.loads(file.read())
def enable_function(self, func: str) -> None:
with self.__udc_stopped():
os.symlink(
usb.get_gadget_path(self.__gadget, usb.G_FUNCTIONS, func),
usb.get_gadget_path(self.__gadget, usb.G_PROFILE, func),
)
def disable_function(self, func: str) -> None:
with self.__udc_stopped():
os.unlink(usb.get_gadget_path(self.__gadget, usb.G_PROFILE, func))
def list_functions(self) -> None:
for meta in self.__read_metas():
enabled = os.path.exists(usb.get_gadget_path(self.__gadget, usb.G_PROFILE, meta["func"]))
print(f"{'+' if enabled else '-'} {meta['func']} # {meta['name']}")
def make_gpio_config(self) -> None:
config = {
"drivers": {"otgconf": {"type": "otgconf"}},
"scheme": {},
"view": {"table": []},
}
for meta in self.__read_metas():
config["scheme"][meta["func"]] = { # type: ignore
"driver": "otgconf",
"pin": meta["func"],
"mode": "output",
"pulse": {"delay": 0},
}
config["view"]["table"].append([ # type: ignore
"#" + meta["name"],
"#" + meta["func"],
meta["func"],
])
print(yaml.dump({"kvmd": {"gpio": config}}, indent=4))
def reset(self) -> None:
with self.__udc_stopped():
pass
# =====
def main(argv: (list[str] | None)=None) -> None:
(parent_parser, argv, config) = init(
add_help=False,
cli_logging=True,
argv=argv,
)
parser = argparse.ArgumentParser(
prog="kvmd-otgconf",
description="KVMD OTG low-level runtime configuration tool",
parents=[parent_parser],
)
parser.add_argument("-l", "--list-functions", action="store_true", help="List functions")
parser.add_argument("-e", "--enable-function", type=valid_stripped_string_not_empty,
metavar="<name>", help="Enable function")
parser.add_argument("-d", "--disable-function", type=valid_stripped_string_not_empty,
metavar="<name>", help="Disable function")
parser.add_argument("-r", "--reset-gadget", action="store_true", help="Reset gadget")
parser.add_argument("--make-gpio-config", action="store_true")
options = parser.parse_args(argv[1:])
gc = _GadgetControl(config.otg.meta, config.otg.gadget, config.otg.udc, config.otg.init_delay)
if options.list_functions:
gc.list_functions()
elif options.enable_function:
gc.enable_function(options.enable_function)
gc.list_functions()
elif options.disable_function:
gc.disable_function(options.disable_function)
gc.list_functions()
elif options.reset_gadget:
gc.reset()
elif options.make_gpio_config:
gc.make_gpio_config()
else:
gc.list_functions()
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