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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2022 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
from . import env
# =====
def find_udc(udc: str) -> str:
path = f"{env.SYSFS_PREFIX}/sys/class/udc"
candidates = sorted(os.listdir(path))
if not udc:
if len(candidates) == 0:
raise RuntimeError("Can't find any UDC")
udc = candidates[0]
elif udc not in candidates:
raise RuntimeError(f"Can't find selected UDC: {udc}")
return udc # fe980000.usb
# =====
U_STATE = "state"
def get_udc_path(udc: str, *parts: str) -> str:
return os.path.join(f"{env.SYSFS_PREFIX}/sys/class/udc", udc, *parts)
# =====
G_UDC = "UDC"
G_FUNCTIONS = "functions"
G_PROFILE_NAME = "c.1"
G_PROFILE = f"configs/{G_PROFILE_NAME}"
def get_gadget_path(gadget: str, *parts: str) -> str:
return os.path.join(f"{env.SYSFS_PREFIX}/sys/kernel/config/usb_gadget", gadget, *parts)
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