1 files changed, 78 insertions, 0 deletions
diff --git a/kvmd/plugins/msd/relay/gpio.py b/kvmd/plugins/msd/relay/gpio.py
new file mode 100644
index 00000000..0950c1d6
--- /dev/null
+++ b/kvmd/plugins/msd/relay/gpio.py
@@ -0,0 +1,78 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  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 Optional
+
+import gpiod
+
+from .... import env
+from .... import aiogp
+
+
+# =====
+class Gpio:
+    def __init__(
+        self,
+        target_pin: int,
+        reset_pin: int,
+        reset_delay: float,
+    ) -> None:
+
+        self.__target_pin = target_pin
+        self.__reset_pin = reset_pin
+        self.__reset_delay = reset_delay
+
+        self.__chip: Optional[gpiod.Chip] = None
+        self.__target_line: Optional[gpiod.Line] = None
+        self.__reset_line: Optional[gpiod.Line] = None
+
+    def open(self) -> None:
+        assert self.__chip is None
+        assert self.__target_line is None
+        assert self.__reset_line is None
+
+        self.__chip = gpiod.Chip(env.GPIO_DEVICE_PATH)
+
+        self.__target_line = self.__chip.get_line(self.__target_pin)
+        self.__target_line.request("kvmd::msd::target", gpiod.LINE_REQ_DIR_OUT, default_vals=[0])
+
+        self.__reset_line = self.__chip.get_line(self.__reset_pin)
+        self.__reset_line.request("kvmd::msd::reset", gpiod.LINE_REQ_DIR_OUT, default_vals=[0])
+
+    def close(self) -> None:
+        if self.__chip:
+            try:
+                self.__chip.close()
+            except Exception:
+                pass
+
+    def switch_to_local(self) -> None:
+        assert self.__target_line
+        self.__target_line.set_value(0)
+
+    def switch_to_server(self) -> None:
+        assert self.__target_line
+        self.__target_line.set_value(1)
+
+    async def reset(self) -> None:
+        assert self.__reset_line
+        await aiogp.pulse(self.__reset_line, self.__reset_delay, 0)