422 lines
13 KiB
Python
422 lines
13 KiB
Python
#!/bin/env python3
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
# -*- coding: utf-8 -*-
|
|
#
|
|
# Copyright (c) 2017 Benjamin Tissoires <benjamin.tissoires@gmail.com>
|
|
# Copyright (c) 2017 Red Hat, Inc.
|
|
#
|
|
# 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 2 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 <http://www.gnu.org/licenses/>.
|
|
|
|
import fcntl
|
|
import functools
|
|
import libevdev
|
|
import os
|
|
|
|
try:
|
|
import pyudev
|
|
except ImportError:
|
|
raise ImportError("UHID is not supported due to missing pyudev dependency")
|
|
|
|
import logging
|
|
|
|
import hidtools.hid as hid
|
|
from hidtools.uhid import UHIDDevice
|
|
from hidtools.util import BusType
|
|
|
|
from pathlib import Path
|
|
from typing import Any, ClassVar, Dict, List, Optional, Tuple, Type, Union
|
|
|
|
logger = logging.getLogger("hidtools.device.base_device")
|
|
|
|
|
|
class SysfsFile(object):
|
|
def __init__(self, path):
|
|
self.path = path
|
|
|
|
def __set_value(self, value):
|
|
with open(self.path, "w") as f:
|
|
return f.write(f"{value}\n")
|
|
|
|
def __get_value(self):
|
|
with open(self.path) as f:
|
|
return f.read().strip()
|
|
|
|
@property
|
|
def int_value(self) -> int:
|
|
return int(self.__get_value())
|
|
|
|
@int_value.setter
|
|
def int_value(self, v: int) -> None:
|
|
self.__set_value(v)
|
|
|
|
@property
|
|
def str_value(self) -> str:
|
|
return self.__get_value()
|
|
|
|
@str_value.setter
|
|
def str_value(self, v: str) -> None:
|
|
self.__set_value(v)
|
|
|
|
|
|
class LED(object):
|
|
def __init__(self, sys_path):
|
|
self.max_brightness = SysfsFile(sys_path / "max_brightness").int_value
|
|
self.__brightness = SysfsFile(sys_path / "brightness")
|
|
|
|
@property
|
|
def brightness(self) -> int:
|
|
return self.__brightness.int_value
|
|
|
|
@brightness.setter
|
|
def brightness(self, value: int) -> None:
|
|
self.__brightness.int_value = value
|
|
|
|
|
|
class PowerSupply(object):
|
|
"""Represents Linux power_supply_class sysfs nodes."""
|
|
|
|
def __init__(self, sys_path):
|
|
self._capacity = SysfsFile(sys_path / "capacity")
|
|
self._status = SysfsFile(sys_path / "status")
|
|
self._type = SysfsFile(sys_path / "type")
|
|
|
|
@property
|
|
def capacity(self) -> int:
|
|
return self._capacity.int_value
|
|
|
|
@property
|
|
def status(self) -> str:
|
|
return self._status.str_value
|
|
|
|
@property
|
|
def type(self) -> str:
|
|
return self._type.str_value
|
|
|
|
|
|
class HIDIsReady(object):
|
|
"""
|
|
Companion class that binds to a kernel mechanism
|
|
and that allows to know when a uhid device is ready or not.
|
|
|
|
See :meth:`is_ready` for details.
|
|
"""
|
|
|
|
def __init__(self: "HIDIsReady", uhid: UHIDDevice) -> None:
|
|
self.uhid = uhid
|
|
|
|
def is_ready(self: "HIDIsReady") -> bool:
|
|
"""
|
|
Overwrite in subclasses: should return True or False whether
|
|
the attached uhid device is ready or not.
|
|
"""
|
|
return False
|
|
|
|
|
|
class UdevHIDIsReady(HIDIsReady):
|
|
_pyudev_context: ClassVar[Optional[pyudev.Context]] = None
|
|
_pyudev_monitor: ClassVar[Optional[pyudev.Monitor]] = None
|
|
_uhid_devices: ClassVar[Dict[int, Tuple[bool, int]]] = {}
|
|
|
|
def __init__(self: "UdevHIDIsReady", uhid: UHIDDevice) -> None:
|
|
super().__init__(uhid)
|
|
self._init_pyudev()
|
|
|
|
@classmethod
|
|
def _init_pyudev(cls: Type["UdevHIDIsReady"]) -> None:
|
|
if cls._pyudev_context is None:
|
|
cls._pyudev_context = pyudev.Context()
|
|
cls._pyudev_monitor = pyudev.Monitor.from_netlink(cls._pyudev_context)
|
|
cls._pyudev_monitor.filter_by("hid")
|
|
cls._pyudev_monitor.start()
|
|
|
|
UHIDDevice._append_fd_to_poll(
|
|
cls._pyudev_monitor.fileno(), cls._cls_udev_event_callback
|
|
)
|
|
|
|
@classmethod
|
|
def _cls_udev_event_callback(cls: Type["UdevHIDIsReady"]) -> None:
|
|
if cls._pyudev_monitor is None:
|
|
return
|
|
event: pyudev.Device
|
|
for event in iter(functools.partial(cls._pyudev_monitor.poll, 0.02), None):
|
|
if event.action not in ["bind", "remove", "unbind"]:
|
|
return
|
|
|
|
logger.debug(f"udev event: {event.action} -> {event}")
|
|
|
|
id = int(event.sys_path.strip().split(".")[-1], 16)
|
|
|
|
device_ready, count = cls._uhid_devices.get(id, (False, 0))
|
|
|
|
ready = event.action == "bind"
|
|
if not device_ready and ready:
|
|
count += 1
|
|
cls._uhid_devices[id] = (ready, count)
|
|
|
|
def is_ready(self: "UdevHIDIsReady") -> Tuple[bool, int]:
|
|
try:
|
|
return self._uhid_devices[self.uhid.hid_id]
|
|
except KeyError:
|
|
return (False, 0)
|
|
|
|
|
|
class EvdevMatch(object):
|
|
def __init__(
|
|
self: "EvdevMatch",
|
|
*,
|
|
requires: List[Any] = [],
|
|
excludes: List[Any] = [],
|
|
req_properties: List[Any] = [],
|
|
excl_properties: List[Any] = [],
|
|
) -> None:
|
|
self.requires = requires
|
|
self.excludes = excludes
|
|
self.req_properties = req_properties
|
|
self.excl_properties = excl_properties
|
|
|
|
def is_a_match(self: "EvdevMatch", evdev: libevdev.Device) -> bool:
|
|
for m in self.requires:
|
|
if not evdev.has(m):
|
|
return False
|
|
for m in self.excludes:
|
|
if evdev.has(m):
|
|
return False
|
|
for p in self.req_properties:
|
|
if not evdev.has_property(p):
|
|
return False
|
|
for p in self.excl_properties:
|
|
if evdev.has_property(p):
|
|
return False
|
|
return True
|
|
|
|
|
|
class EvdevDevice(object):
|
|
"""
|
|
Represents an Evdev node and its properties.
|
|
This is a stub for the libevdev devices, as they are relying on
|
|
uevent to get the data, saving us some ioctls to fetch the names
|
|
and properties.
|
|
"""
|
|
|
|
def __init__(self: "EvdevDevice", sysfs: Path) -> None:
|
|
self.sysfs = sysfs
|
|
self.event_node: Any = None
|
|
self.libevdev: Optional[libevdev.Device] = None
|
|
|
|
self.uevents = {}
|
|
# all of the interesting properties are stored in the input uevent, so in the parent
|
|
# so convert the uevent file of the parent input node into a dict
|
|
with open(sysfs.parent / "uevent") as f:
|
|
for line in f.readlines():
|
|
key, value = line.strip().split("=")
|
|
self.uevents[key] = value.strip('"')
|
|
|
|
# we open all evdev nodes in order to not miss any event
|
|
self.open()
|
|
|
|
@property
|
|
def name(self: "EvdevDevice") -> str:
|
|
assert "NAME" in self.uevents
|
|
|
|
return self.uevents["NAME"]
|
|
|
|
@property
|
|
def evdev(self: "EvdevDevice") -> Path:
|
|
return Path("/dev/input") / self.sysfs.name
|
|
|
|
def matches_application(
|
|
self: "EvdevDevice", application: str, matches: Dict[str, EvdevMatch]
|
|
) -> bool:
|
|
if self.libevdev is None:
|
|
return False
|
|
|
|
if application in matches:
|
|
return matches[application].is_a_match(self.libevdev)
|
|
|
|
logger.error(
|
|
f"application '{application}' is unknown, please update/fix hid-tools"
|
|
)
|
|
assert False # hid-tools likely needs an update
|
|
|
|
def open(self: "EvdevDevice") -> libevdev.Device:
|
|
self.event_node = open(self.evdev, "rb")
|
|
self.libevdev = libevdev.Device(self.event_node)
|
|
|
|
assert self.libevdev.fd is not None
|
|
|
|
fd = self.libevdev.fd.fileno()
|
|
flag = fcntl.fcntl(fd, fcntl.F_GETFD)
|
|
fcntl.fcntl(fd, fcntl.F_SETFL, flag | os.O_NONBLOCK)
|
|
|
|
return self.libevdev
|
|
|
|
def close(self: "EvdevDevice") -> None:
|
|
if self.libevdev is not None and self.libevdev.fd is not None:
|
|
self.libevdev.fd.close()
|
|
self.libevdev = None
|
|
if self.event_node is not None:
|
|
self.event_node.close()
|
|
self.event_node = None
|
|
|
|
|
|
class BaseDevice(UHIDDevice):
|
|
# default _application_matches that matches nothing. This needs
|
|
# to be set in the subclasses to have get_evdev() working
|
|
_application_matches: Dict[str, EvdevMatch] = {}
|
|
|
|
def __init__(
|
|
self,
|
|
name,
|
|
application,
|
|
rdesc_str: Optional[str] = None,
|
|
rdesc: Optional[Union[hid.ReportDescriptor, str, bytes]] = None,
|
|
input_info=None,
|
|
) -> None:
|
|
self._kernel_is_ready: HIDIsReady = UdevHIDIsReady(self)
|
|
if rdesc_str is None and rdesc is None:
|
|
raise Exception("Please provide at least a rdesc or rdesc_str")
|
|
super().__init__()
|
|
if name is None:
|
|
name = f"uhid gamepad test {self.__class__.__name__}"
|
|
if input_info is None:
|
|
input_info = (BusType.USB, 1, 2)
|
|
self.name = name
|
|
self.info = input_info
|
|
self.default_reportID = None
|
|
self.opened = False
|
|
self.started = False
|
|
self.application = application
|
|
self._input_nodes: Optional[list[EvdevDevice]] = None
|
|
if rdesc is None:
|
|
assert rdesc_str is not None
|
|
self.rdesc = hid.ReportDescriptor.from_human_descr(rdesc_str) # type: ignore
|
|
else:
|
|
self.rdesc = rdesc # type: ignore
|
|
|
|
@property
|
|
def power_supply_class(self: "BaseDevice") -> Optional[PowerSupply]:
|
|
ps = self.walk_sysfs("power_supply", "power_supply/*")
|
|
if ps is None or len(ps) < 1:
|
|
return None
|
|
|
|
return PowerSupply(ps[0])
|
|
|
|
@property
|
|
def led_classes(self: "BaseDevice") -> List[LED]:
|
|
leds = self.walk_sysfs("led", "**/max_brightness")
|
|
if leds is None:
|
|
return []
|
|
|
|
return [LED(led.parent) for led in leds]
|
|
|
|
@property
|
|
def kernel_is_ready(self: "BaseDevice") -> bool:
|
|
return self._kernel_is_ready.is_ready()[0] and self.started
|
|
|
|
@property
|
|
def kernel_ready_count(self: "BaseDevice") -> int:
|
|
return self._kernel_is_ready.is_ready()[1]
|
|
|
|
@property
|
|
def input_nodes(self: "BaseDevice") -> List[EvdevDevice]:
|
|
if self._input_nodes is not None:
|
|
return self._input_nodes
|
|
|
|
if not self.kernel_is_ready or not self.started:
|
|
return []
|
|
|
|
self._input_nodes = [
|
|
EvdevDevice(path)
|
|
for path in self.walk_sysfs("input", "input/input*/event*")
|
|
]
|
|
return self._input_nodes
|
|
|
|
def match_evdev_rule(self, application, evdev):
|
|
"""Replace this in subclasses if the device has multiple reports
|
|
of the same type and we need to filter based on the actual evdev
|
|
node.
|
|
|
|
returning True will append the corresponding report to
|
|
`self.input_nodes[type]`
|
|
returning False will ignore this report / type combination
|
|
for the device.
|
|
"""
|
|
return True
|
|
|
|
def open(self):
|
|
self.opened = True
|
|
|
|
def _close_all_opened_evdev(self):
|
|
if self._input_nodes is not None:
|
|
for e in self._input_nodes:
|
|
e.close()
|
|
|
|
def __del__(self):
|
|
self._close_all_opened_evdev()
|
|
|
|
def close(self):
|
|
self.opened = False
|
|
|
|
def start(self, flags):
|
|
self.started = True
|
|
|
|
def stop(self):
|
|
self.started = False
|
|
self._close_all_opened_evdev()
|
|
|
|
def next_sync_events(self, application=None):
|
|
evdev = self.get_evdev(application)
|
|
if evdev is not None:
|
|
return list(evdev.events())
|
|
return []
|
|
|
|
@property
|
|
def application_matches(self: "BaseDevice") -> Dict[str, EvdevMatch]:
|
|
return self._application_matches
|
|
|
|
@application_matches.setter
|
|
def application_matches(self: "BaseDevice", data: Dict[str, EvdevMatch]) -> None:
|
|
self._application_matches = data
|
|
|
|
def get_evdev(self, application=None):
|
|
if application is None:
|
|
application = self.application
|
|
|
|
if len(self.input_nodes) == 0:
|
|
return None
|
|
|
|
assert self._input_nodes is not None
|
|
|
|
if len(self._input_nodes) == 1:
|
|
evdev = self._input_nodes[0]
|
|
if self.match_evdev_rule(application, evdev.libevdev):
|
|
return evdev.libevdev
|
|
else:
|
|
for _evdev in self._input_nodes:
|
|
if _evdev.matches_application(application, self.application_matches):
|
|
if self.match_evdev_rule(application, _evdev.libevdev):
|
|
return _evdev.libevdev
|
|
|
|
def is_ready(self):
|
|
"""Returns whether a UHID device is ready. Can be overwritten in
|
|
subclasses to add extra conditions on when to consider a UHID
|
|
device ready. This can be:
|
|
|
|
- we need to wait on different types of input devices to be ready
|
|
(Touch Screen and Pen for example)
|
|
- we need to have at least 4 LEDs present
|
|
(len(self.uhdev.leds_classes) == 4)
|
|
- or any other combinations"""
|
|
return self.kernel_is_ready
|