Kernel: Add support for DualShock 3 controllers

This driver accepts any HID joystick devices but button and axis
mappings will only work on a PS3 controller

kernel/include/kernel/Device/DeviceNumbers.h

@@ -16,6 +16,7 @@ namespace Kernel
 		Debug,
 		Keyboard,
 		Mouse,
+		Joystick,
 		SCSI,
 		NVMeController,
 		NVMeNamespace,

kernel/include/kernel/Input/InputDevice.h

@@ -15,6 +15,7 @@ namespace Kernel
 		{
 			Mouse,
 			Keyboard,
+			Joystick,
 		};
 
 	public:

kernel/include/kernel/USB/HID/HIDDriver.h

@@ -55,6 +55,8 @@ namespace Kernel
 		{}
 		virtual ~USBHIDDevice() = default;
 
+		virtual BAN::ErrorOr<void> initialize() { return {}; }
+
 		virtual void start_report() = 0;
 		virtual void stop_report() = 0;
 

kernel/include/kernel/USB/HID/Joystick.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <kernel/USB/HID/HIDDriver.h>
+
+#include <LibInput/Joystick.h>
+
+namespace Kernel
+{
+
+	class USBJoystick final : public USBHIDDevice
+	{
+		BAN_NON_COPYABLE(USBJoystick);
+		BAN_NON_MOVABLE(USBJoystick);
+
+	public:
+		BAN::ErrorOr<void> initialize() override;
+
+		void start_report() override;
+		void stop_report() override;
+
+		void handle_array(uint16_t usage_page, uint16_t usage) override;
+		void handle_variable(uint16_t usage_page, uint16_t usage, int64_t state) override;
+		void handle_variable_absolute(uint16_t usage_page, uint16_t usage, int64_t state, int64_t min, int64_t max) override;
+
+	protected:
+		BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		bool can_read_impl() const override { return true; }
+
+	private:
+		USBJoystick(USBHIDDriver&);
+		~USBJoystick() = default;
+
+	private:
+		USBHIDDriver& m_driver;
+
+		SpinLock m_state_lock;
+		InterruptState m_interrupt_state;
+		LibInput::JoystickState m_state {};
+
+		friend class BAN::RefPtr<USBJoystick>;
+	};
+
+}