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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/>. #
# #
# ========================================================================== #
from typing import Callable
from typing import Any
import gpiod
from ... import aiotools
from ... import aiogp
from ...yamlconf import Option
from ...validators.os import valid_abs_path
from ...validators.hw import valid_gpio_pin
from . import BaseUserGpioDriver
# =====
class Plugin(BaseUserGpioDriver):
def __init__(
self,
instance_name: str,
notifier: aiotools.AioNotifier,
device_path: str,
) -> None:
super().__init__(instance_name, notifier)
self.__device_path = device_path
self.__input_pins: dict[int, aiogp.AioReaderPinParams] = {}
self.__output_pins: dict[int, (bool | None)] = {}
self.__reader: (aiogp.AioReader | None) = None
self.__outputs_request: (gpiod.LineRequest | None) = None
@classmethod
def get_plugin_options(cls) -> dict:
return {
"device": Option("/dev/gpiochip0", type=valid_abs_path, unpack_as="device_path"),
}
@classmethod
def get_pin_validator(cls) -> Callable[[Any], Any]:
return valid_gpio_pin
def register_input(self, pin: str, debounce: float) -> None:
self.__input_pins[int(pin)] = aiogp.AioReaderPinParams(False, debounce)
def register_output(self, pin: str, initial: (bool | None)) -> None:
self.__output_pins[int(pin)] = initial
def prepare(self) -> None:
assert self.__reader is None
assert self.__outputs_request is None
self.__reader = aiogp.AioReader(
path=self.__device_path,
consumer="kvmd::gpio::inputs",
pins=self.__input_pins,
notifier=self._notifier,
)
if self.__output_pins:
self.__outputs_request = gpiod.request_lines(
self.__device_path,
consumer="kvmd::gpiod::outputs",
config={
pin: gpiod.LineSettings(
direction=gpiod.line.Direction.OUTPUT,
output_value=gpiod.line.Value(initial or False),
)
for (pin, initial) in self.__output_pins.items()
},
)
async def run(self) -> None:
assert self.__reader
await self.__reader.poll()
async def cleanup(self) -> None:
if self.__outputs_request:
try:
self.__outputs_request.release()
except Exception:
pass
async def read(self, pin: str) -> bool:
assert self.__reader
pin_int = int(pin)
if pin_int in self.__input_pins:
return self.__reader.get(pin_int)
assert self.__outputs_request
assert pin_int in self.__output_pins
return bool(self.__outputs_request.get_value(pin_int).value)
async def write(self, pin: str, state: bool) -> None:
assert self.__outputs_request
pin_int = int(pin)
assert pin_int in self.__output_pins
self.__outputs_request.set_value(pin_int, gpiod.line.Value(state))
def __str__(self) -> str:
return f"GPIO({self._instance_name})"
__repr__ = __str__
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