mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-13 01:30:31 +08:00
111 lines
4.5 KiB
Python
111 lines
4.5 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main PiKVM daemon. #
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# #
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# Copyright (C) 2018-2023 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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# ========================================================================== #
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import types
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import time
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import gpiod
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from ....logging import get_logger
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# =====
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class Gpio: # pylint: disable=too-many-instance-attributes
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def __init__(
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self,
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device_path: str,
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power_detect_pin: int,
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power_detect_pull_down: bool,
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reset_pin: int,
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reset_inverted: bool,
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reset_delay: float,
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) -> None:
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self.__device_path = device_path
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self.__power_detect_pin = power_detect_pin
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self.__power_detect_pull_down = power_detect_pull_down
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self.__reset_pin = reset_pin
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self.__reset_inverted = reset_inverted
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self.__reset_delay = reset_delay
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self.__chip: (gpiod.Chip | None) = None
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self.__power_detect_line: (gpiod.Line | None) = None
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self.__reset_line: (gpiod.Line | None) = None
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self.__last_power: (bool | None) = None
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def __enter__(self) -> None:
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if self.__power_detect_pin >= 0 or self.__reset_pin >= 0:
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assert self.__chip is None
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self.__chip = gpiod.Chip(self.__device_path)
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if self.__power_detect_pin >= 0:
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assert self.__power_detect_line is None
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self.__power_detect_line = self.__chip.get_line(self.__power_detect_pin)
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self.__power_detect_line.request(
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"kvmd::hid::power_detect", gpiod.LINE_REQ_DIR_IN,
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flags=(gpiod.LINE_REQ_FLAG_BIAS_PULL_DOWN if self.__power_detect_pull_down else 0),
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)
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if self.__reset_pin >= 0:
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assert self.__reset_line is None
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self.__reset_line = self.__chip.get_line(self.__reset_pin)
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self.__reset_line.request(
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"kvmd::hid::reset", gpiod.LINE_REQ_DIR_OUT,
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default_vals=[int(self.__reset_inverted)],
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)
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def __exit__(
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self,
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_exc_type: type[BaseException],
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_exc: BaseException,
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_tb: types.TracebackType,
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) -> None:
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if self.__chip:
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try:
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self.__chip.close()
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except Exception:
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pass
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self.__last_power = None
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self.__power_detect_line = None
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self.__reset_line = None
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self.__chip = None
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def is_powered(self) -> bool:
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if self.__power_detect_line is not None:
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power = bool(self.__power_detect_line.get_value())
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if power != self.__last_power:
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get_logger(0).info("HID power state changed: %s -> %s", self.__last_power, power)
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self.__last_power = power
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return power
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return True
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def reset(self) -> None:
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if self.__reset_pin >= 0:
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assert self.__reset_line
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try:
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self.__reset_line.set_value(int(not self.__reset_inverted))
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time.sleep(self.__reset_delay)
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finally:
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self.__reset_line.set_value(int(self.__reset_inverted))
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time.sleep(1)
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get_logger(0).info("Reset HID performed")
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