Kernel/USB: Move the USB components as a subfolder to the Bus directory

Kernel/Bus/USB/USBDevice.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/OwnPtr.h>
+#include <AK/Types.h>
+#include <Kernel/Bus/USB/USBPipe.h>
+
+namespace Kernel::USB {
+
+//
+// Some nice info from FTDI on device enumeration and how some of this
+// glues together:
+//
+// https://www.ftdichip.com/Support/Documents/TechnicalNotes/TN_113_Simplified%20Description%20of%20USB%20Device%20Enumeration.pdf
+class Device : public RefCounted<Device> {
+public:
+    enum class PortNumber : u8 {
+        Port1 = 0,
+        Port2
+    };
+
+    enum class DeviceSpeed : u8 {
+        FullSpeed = 0,
+        LowSpeed
+    };
+
+public:
+    static KResultOr<NonnullRefPtr<Device>> try_create(PortNumber, DeviceSpeed);
+
+    Device(PortNumber, DeviceSpeed, NonnullOwnPtr<Pipe> default_pipe);
+    ~Device();
+
+    KResult enumerate();
+
+    PortNumber port() const { return m_device_port; }
+    DeviceSpeed speed() const { return m_device_speed; }
+
+    u8 address() const { return m_address; }
+
+    const USBDeviceDescriptor& device_descriptor() const { return m_device_descriptor; }
+
+private:
+    PortNumber m_device_port;   // What port is this device attached to
+    DeviceSpeed m_device_speed; // What speed is this device running at
+    u8 m_address { 0 };         // USB address assigned to this device
+
+    // Device description
+    u16 m_vendor_id { 0 };                   // This device's vendor ID assigned by the USB group
+    u16 m_product_id { 0 };                  // This device's product ID assigned by the USB group
+    USBDeviceDescriptor m_device_descriptor; // Device Descriptor obtained from USB Device
+
+    NonnullOwnPtr<Pipe> m_default_pipe; // Default communication pipe (endpoint0) used during enumeration
+};
+}