add generic driver

Signed-off-by: Pascal Bauer <pascal.bauer@rwth-aachen.de>

common/include/villas/kernel/devices/generic_driver.hpp

@@ -0,0 +1,52 @@
+/* GenericDriver - Works for standard Linux drivers
+ *
+ * Author: Pascal Bauer <pascal.bauer@rwth-aachen.de>
+ *
+ * SPDX-FileCopyrightText: 2023-2024 Pascal Bauer <pascal.bauer@rwth-aachen.de>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <villas/kernel/devices/driver.hpp>
+
+namespace villas {
+namespace kernel {
+namespace devices {
+
+class GenericDriver : public Driver {
+private:
+  static constexpr char BIND_DEFAULT[] = "bind";
+  static constexpr char UNBIND_DEFAULT[] = "unbind";
+
+public:
+  const std::filesystem::path path;
+
+private:
+  const std::filesystem::path bind_path;
+  const std::filesystem::path unbind_path;
+
+public:
+  GenericDriver(const std::filesystem::path path)
+      : GenericDriver(path, path / std::filesystem::path(BIND_DEFAULT),
+                      path / std::filesystem::path(UNBIND_DEFAULT)){};
+
+  GenericDriver(const std::filesystem::path path,
+                const std::filesystem::path bind_path,
+                const std::filesystem::path unbind_path)
+      : path(path), bind_path(bind_path), unbind_path(unbind_path){};
+
+public:
+  virtual void attach(const Device &device) const = 0;
+  virtual void bind(const Device &device) const = 0;
+  virtual std::string name() const = 0;
+  virtual void override(const Device &device) const = 0;
+  virtual void unbind(const Device &device) const = 0;
+};
+
+} // namespace devices
+} // namespace kernel
+} // namespace villas

common/lib/kernel/devices/generic_driver.cpp

@@ -0,0 +1,40 @@
+/* GenericDriver
+ *
+ * Author: Pascal Bauer <pascal.bauer@rwth-aachen.de>
+ *
+ * SPDX-FileCopyrightText: 2023-2024 Pascal Bauer <pascal.bauer@rwth-aachen.de>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <villas/kernel/devices/generic_driver.hpp>
+
+#include <villas/kernel/devices/device.hpp>
+#include <villas/kernel/devices/utils.hpp>
+
+using villas::kernel::devices::Device, villas::kernel::devices::GenericDriver;
+using villas::kernel::devices::utils::write_to_file;
+
+void GenericDriver::attach(const Device &device) const {
+  if (device.driver().has_value()) {
+    device.driver().value()->unbind(device);
+  }
+  this->override(device);
+  device.probe();
+}
+
+void GenericDriver::bind(const Device &device) const {
+  write_to_file(device.name(), this->bind_path);
+}
+
+std::string GenericDriver::name() const {
+  size_t pos = path.u8string().rfind('/');
+  return path.u8string().substr(pos + 1);
+}
+
+void GenericDriver::override(const Device &device) const {
+  write_to_file(this->name(), device.override_path());
+}
+
+void GenericDriver::unbind(const Device &device) const {
+  write_to_file(device.name(), this->unbind_path);
+}