Kernel: Do a big rewrite of PS/2 code

Command sending+response reading is now synchronized. This allows
bochs to properly initialize both mouse and keyboard simultaneously.

Also status register is checked EVERY time read/write to other IO
ports is performed.

kernel/include/kernel/Errors.h

@@ -11,10 +11,6 @@ namespace Kernel
 		ACPI_NoRootSDT,
 		ACPI_NoSuchHeader,
 		ACPI_RootInvalid,
-		PS2_Timeout,
-		PS2_SelfTest,
-		PS2_Reset,
-		PS2_UnsupportedDevice,
 		Ext2_Invalid,
 		Ext2_Corrupted,
 		Ext2_NoInodes,

kernel/include/kernel/Input/PS2/Config.h

@@ -14,8 +14,8 @@ namespace Kernel::Input::PS2
 
 	enum Status : uint8_t
 	{
-		OUTPUT_FULL = (1 << 0),
+		OUTPUT_STATUS = (1 << 0),
-		INPUT_FULL = (1 << 1),
+		INPUT_STATUS = (1 << 1),
 		SYSTEM = (1 << 2),
 		DEVICE_OR_CONTROLLER = (1 << 3),
 		TIMEOUT_ERROR = (1 << 6),

kernel/include/kernel/Input/PS2/Controller.h

@@ -1,8 +1,10 @@
 #pragma once
 
-#include <BAN/CircularQueue.h>
+#include <BAN/UniqPtr.h>
 #include <kernel/Device/Device.h>
+#include <kernel/Input/PS2/Config.h>
 #include <kernel/InterruptController.h>
+#include <kernel/SpinLock.h>
 
 namespace Kernel::Input
 {
@@ -15,7 +17,10 @@ namespace Kernel::Input
 		static BAN::ErrorOr<void> initialize();
 		static PS2Controller& get();
 
-		void send_byte(const PS2Device*, uint8_t);
+		BAN::ErrorOr<void> device_send_byte(PS2Device* device, uint8_t byte);
+
+		[[nodiscard]] bool lock_command(PS2Device*);
+		void unlock_command(PS2Device*);
 
 	private:
 		PS2Controller() = default;
@@ -25,8 +30,21 @@ namespace Kernel::Input
 		BAN::ErrorOr<void> reset_device(uint8_t);
 		BAN::ErrorOr<void> set_scanning(uint8_t, bool);
 
+		BAN::ErrorOr<uint8_t> read_byte();
+		BAN::ErrorOr<void> send_byte(uint16_t port, uint8_t byte);
+
+		BAN::ErrorOr<void> send_command(PS2::Command command);
+		BAN::ErrorOr<void> send_command(PS2::Command command, uint8_t data);
+
+		BAN::ErrorOr<void> device_send_byte(uint8_t device_index, uint8_t byte);
+		BAN::ErrorOr<void> device_read_ack(uint8_t device_index);
+
 	private:
-		PS2Device* m_devices[2] { nullptr, nullptr };
+		BAN::RefPtr<PS2Device> m_devices[2];
+		RecursiveSpinLock m_lock;
+
+		PS2Device* m_executing_device	{ nullptr };
+		PS2Device* m_pending_device		{ nullptr };
 	};
 
 }

kernel/include/kernel/Input/PS2/Device.h

@@ -1,6 +1,8 @@
 #pragma once
 
+#include <BAN/CircularQueue.h>
 #include <kernel/Input/PS2/Controller.h>
+#include <kernel/InterruptController.h>
 
 namespace Kernel::Input
 {
@@ -13,8 +15,8 @@ namespace Kernel::Input
 
 		virtual void send_initialize() = 0;
 
-		bool append_command_queue(uint8_t command);
+		bool append_command_queue(uint8_t command, uint8_t response_size);
-		bool append_command_queue(uint8_t command, uint8_t data);
+		bool append_command_queue(uint8_t command, uint8_t data, uint8_t response_size);
 		virtual void handle_irq() final override;
 
 		virtual void handle_byte(uint8_t) = 0;
@@ -24,13 +26,22 @@ namespace Kernel::Input
 		virtual dev_t rdev() const final override { return m_rdev; }
 
 	private:
-		void update();
+		void update_command();
 
 	private:
 		enum class State
 		{
 			Normal,
 			WaitingAck,
+			WaitingResponse,
+		};
+
+		struct Command
+		{
+			uint8_t out_data[2];
+			uint8_t out_count;
+			uint8_t in_count;
+			uint8_t send_index;
 		};
 
 	private:
@@ -39,7 +50,9 @@ namespace Kernel::Input
 
 		PS2Controller&					m_controller;
 		State							m_state			= State::Normal;
-		BAN::CircularQueue<uint8_t, 10>	m_command_queue;
+		BAN::CircularQueue<Command, 10>	m_command_queue;
+
+		friend class PS2Controller;
 	};
 
 }

kernel/kernel/Errors.cpp

@@ -8,10 +8,6 @@ namespace Kernel
 		"ACPI could not find root SDT header"sv,
 		"ACPI no such header"sv,
 		"ACPI root invalid",
-		"PS/2 device timeout"sv,
-		"PS/2 controller self test failed"sv,
-		"PS/2 reset failed"sv,
-		"PS/2 unsupported device"sv,
 		"Invalid ext2 filesystem"sv,
 		"Ext2 filesystem corrupted"sv,
 		"Ext2 filesystem out of inodes"sv,

kernel/kernel/Input/PS2/Controller.cpp

@@ -10,65 +10,110 @@
 #include <kernel/IO.h>
 #include <kernel/Timer/Timer.h>
 
+#define DEBUG_PS2 1
+
 namespace Kernel::Input
 {
 
-	static constexpr uint64_t s_device_timeout_ms = 100;
+	static constexpr uint64_t s_ps2_timeout_ms = 100;
-
-	static void controller_send_command(PS2::Command command)
-	{
-		IO::outb(PS2::IOPort::COMMAND, command);
-	}
-
-	static void controller_send_command(PS2::Command command, uint8_t data)
-	{
-		IO::outb(PS2::IOPort::COMMAND, command);
-		while (IO::inb(PS2::IOPort::STATUS) & PS2::Status::INPUT_FULL)
-			continue;
-		IO::outb(PS2::IOPort::DATA, data);
-	}
-
-	static uint8_t wait_and_read()
-	{
-		while (!(IO::inb(PS2::IOPort::STATUS) & PS2::Status::OUTPUT_FULL))
-			continue;
-		return IO::inb(PS2::IOPort::DATA);
-	}
-
-	static BAN::ErrorOr<void> device_send_byte(uint8_t device, uint8_t byte)
-	{
-		if (device == 1)
-			IO::outb(PS2::IOPort::COMMAND, PS2::Command::WRITE_TO_SECOND_PORT);
-		uint64_t timeout = SystemTimer::get().ms_since_boot() + s_device_timeout_ms;
-		while (SystemTimer::get().ms_since_boot() < timeout)
-		{
-			if (!(IO::inb(PS2::IOPort::STATUS) & PS2::Status::INPUT_FULL))
-			{
-				IO::outb(PS2::IOPort::DATA, byte);
-				return {};
-			}
-		}
-		return BAN::Error::from_error_code(ErrorCode::PS2_Timeout);
-	}
-
-	static BAN::ErrorOr<uint8_t> device_read_byte()
-	{
-		uint64_t timeout = SystemTimer::get().ms_since_boot() + s_device_timeout_ms;
-		while (SystemTimer::get().ms_since_boot() < timeout)
-			if (IO::inb(PS2::IOPort::STATUS) & PS2::Status::OUTPUT_FULL)
-				return IO::inb(PS2::IOPort::DATA);
-		return BAN::Error::from_error_code(ErrorCode::PS2_Timeout);
-	}
-
-	static BAN::ErrorOr<void> device_wait_ack()
-	{
-		while (TRY(device_read_byte()) != PS2::Response::ACK)
-			continue;;
-		return {};
-	}
 
 	static PS2Controller* s_instance = nullptr;
 
+	BAN::ErrorOr<void> PS2Controller::send_byte(uint16_t port, uint8_t byte)
+	{
+		LockGuard _(m_lock);
+		uint64_t timeout = SystemTimer::get().ms_since_boot() + s_ps2_timeout_ms;
+		while (SystemTimer::get().ms_since_boot() < timeout)
+		{
+			if (IO::inb(PS2::IOPort::STATUS) & PS2::Status::INPUT_STATUS)
+				continue;
+			IO::outb(port, byte);
+			return {};
+		}
+		return BAN::Error::from_errno(ETIMEDOUT);
+	}
+
+	BAN::ErrorOr<uint8_t> PS2Controller::read_byte()
+	{
+		LockGuard _(m_lock);
+		uint64_t timeout = SystemTimer::get().ms_since_boot() + s_ps2_timeout_ms;
+		while (SystemTimer::get().ms_since_boot() < timeout)
+		{
+			if (!(IO::inb(PS2::IOPort::STATUS) & PS2::Status::OUTPUT_STATUS))
+				continue;
+			return IO::inb(PS2::IOPort::DATA);
+		}
+		return BAN::Error::from_errno(ETIMEDOUT);
+	}
+
+	BAN::ErrorOr<void> PS2Controller::send_command(PS2::Command command)
+	{
+		LockGuard _(m_lock);
+		TRY(send_byte(PS2::IOPort::COMMAND, command));
+		return {};
+	}
+
+	BAN::ErrorOr<void> PS2Controller::send_command(PS2::Command command, uint8_t data)
+	{
+		LockGuard _(m_lock);
+		TRY(send_byte(PS2::IOPort::COMMAND, command));
+		TRY(send_byte(PS2::IOPort::DATA, data));
+		return {};
+	}
+
+	bool PS2Controller::lock_command(PS2Device* device)
+	{
+		if (m_executing_device && m_executing_device != device)
+		{
+			ASSERT(!m_pending_device || m_pending_device == device);
+			m_pending_device = device;
+			return false;
+		}
+
+		m_executing_device = device;
+		return true;
+	}
+
+	void PS2Controller::unlock_command(PS2Device* device)
+	{
+		ASSERT(m_executing_device == device);
+		m_executing_device = nullptr;
+		if (m_pending_device)
+		{
+			m_executing_device = m_pending_device;
+			m_pending_device = nullptr;
+			m_executing_device->update_command();
+		}
+	}
+
+	BAN::ErrorOr<void> PS2Controller::device_send_byte(uint8_t device_index, uint8_t byte)
+	{
+		LockGuard _(m_lock);
+		if (device_index == 1)
+			TRY(send_byte(PS2::IOPort::COMMAND, PS2::Command::WRITE_TO_SECOND_PORT));
+		TRY(send_byte(PS2::IOPort::DATA, byte));
+		return {};
+	}
+
+	BAN::ErrorOr<void> PS2Controller::device_send_byte(PS2Device* device, uint8_t byte)
+	{
+		ASSERT(device);
+		ASSERT(device == m_devices[0].ptr() || device == m_devices[1].ptr());
+		TRY(device_send_byte(device == m_devices[0].ptr() ? 0 : 1, byte));
+		return {};
+	}
+
+	BAN::ErrorOr<void> PS2Controller::device_read_ack(uint8_t device_index)
+	{
+		LockGuard _(m_lock);
+		if (TRY(read_byte()) != PS2::Response::ACK)
+		{
+			dwarnln_if(DEBUG_PS2, "PS/2 device on port {} did not respond with expected ACK", device_index);
+			return BAN::Error::from_errno(EBADMSG);
+		}
+		return {};
+	}
+
 	BAN::ErrorOr<void> PS2Controller::initialize()
 	{
 		ASSERT(s_instance == nullptr);
@@ -96,48 +141,60 @@ namespace Kernel::Input
 		// FIXME
 
 		// Step 3: Disable Devices
-		controller_send_command(PS2::Command::DISABLE_FIRST_PORT);
+		TRY(send_command(PS2::Command::DISABLE_FIRST_PORT));
-		controller_send_command(PS2::Command::DISABLE_SECOND_PORT);
+		TRY(send_command(PS2::Command::DISABLE_SECOND_PORT));
 
 		// Step 4: Flush The Output Buffer
-		IO::inb(PS2::IOPort::DATA);
+		while (!read_byte().is_error())
+			continue;
 		
 		// Step 5: Set the Controller Configuration Byte
-		controller_send_command(PS2::Command::READ_CONFIG);
+		TRY(send_command(PS2::Command::READ_CONFIG));
-		uint8_t config = wait_and_read();
+		uint8_t config = TRY(read_byte());
 		config &= ~PS2::Config::INTERRUPT_FIRST_PORT;
 		config &= ~PS2::Config::INTERRUPT_SECOND_PORT;
 		config &= ~PS2::Config::TRANSLATION_FIRST_PORT;
-		controller_send_command(PS2::Command::WRITE_CONFIG, config);
+		TRY(send_command(PS2::Command::WRITE_CONFIG, config));
 
 		// Step 6: Perform Controller Self Test
-		controller_send_command(PS2::Command::TEST_CONTROLLER);
+		TRY(send_command(PS2::Command::TEST_CONTROLLER));
-		if (wait_and_read() != PS2::Response::TEST_CONTROLLER_PASS)
+		if (TRY(read_byte()) != PS2::Response::TEST_CONTROLLER_PASS)
-			return BAN::Error::from_error_code(ErrorCode::PS2_SelfTest);
+		{
+			dwarnln_if(DEBUG_PS2, "PS/2 Controller test failed");
+			return BAN::Error::from_errno(ENODEV);
+		}
 		// NOTE: self test might reset the device so we set the config byte again
-		controller_send_command(PS2::Command::WRITE_CONFIG, config);
+		TRY(send_command(PS2::Command::WRITE_CONFIG, config));
 
 		// Step 7: Determine If There Are 2 Channels
 		bool valid_ports[2] { true, false };
 		if (config & PS2::Config::CLOCK_SECOND_PORT)
 		{
-			controller_send_command(PS2::Command::ENABLE_SECOND_PORT);
+			TRY(send_command(PS2::Command::ENABLE_SECOND_PORT));
-			controller_send_command(PS2::Command::READ_CONFIG);
+			TRY(send_command(PS2::Command::READ_CONFIG));
-			if (!(wait_and_read() & PS2::Config::CLOCK_SECOND_PORT))
+			if (!(TRY(read_byte()) & PS2::Config::CLOCK_SECOND_PORT))
+			{
 				valid_ports[1] = true;
-			controller_send_command(PS2::Command::DISABLE_SECOND_PORT);
+				TRY(send_command(PS2::Command::DISABLE_SECOND_PORT));
+			}
 		}
 
 		// Step 8: Perform Interface Tests
-		controller_send_command(PS2::Command::TEST_FIRST_PORT);
+		TRY(send_command(PS2::Command::TEST_FIRST_PORT));
-		if (wait_and_read() != PS2::Response::TEST_FIRST_PORT_PASS)
+		if (TRY(read_byte()) != PS2::Response::TEST_FIRST_PORT_PASS)
+		{
+			dwarnln_if(DEBUG_PS2, "PS/2 first port test failed");
 			valid_ports[0] = false;
+		}
 		if (valid_ports[1])
 		{
-			controller_send_command(PS2::Command::TEST_SECOND_PORT);
+			TRY(send_command(PS2::Command::TEST_SECOND_PORT));
-			if (wait_and_read() != PS2::Response::TEST_SECOND_PORT_PASS)
+			if (TRY(read_byte()) != PS2::Response::TEST_SECOND_PORT_PASS)
+			{
+				dwarnln_if(DEBUG_PS2, "PS/2 second port test failed");
 				valid_ports[1] = false;
 			}
+		}
 		if (!valid_ports[0] && !valid_ports[1])
 			return {};
 		
@@ -146,20 +203,32 @@ namespace Kernel::Input
 		{
 			if (!valid_ports[device])
 				continue;
-			controller_send_command(device == 0 ? PS2::Command::ENABLE_FIRST_PORT : PS2::Command::ENABLE_SECOND_PORT);
+			TRY(send_command(device == 0 ? PS2::Command::ENABLE_FIRST_PORT : PS2::Command::ENABLE_SECOND_PORT));
 			if (set_scanning(device, false).is_error())
+			{
+				dwarnln_if(DEBUG_PS2, "PS/2 could not disable device scanning");
 				valid_ports[device] = false;
 			}
+			TRY(send_command(device == 0 ? PS2::Command::DISABLE_FIRST_PORT : PS2::Command::DISABLE_SECOND_PORT));
+		}
 
 		// Step 10: Reset Devices
 		for (uint8_t device = 0; device < 2; device++)
 		{
 			if (!valid_ports[device])
 				continue;
-			if (reset_device(device).is_error())
+			if (auto ret = reset_device(device); ret.is_error())
+			{
+				dwarnln_if(DEBUG_PS2, "PS/2 device reset failed: {}", ret.error());
 				valid_ports[device] = false;
-			if (set_scanning(device, false).is_error())
+				continue;
+			}
+			if (auto ret = set_scanning(device, false); ret.is_error())
+			{
+				dwarnln_if(DEBUG_PS2, "PS/2 device scan disabling failed: {}", ret.error());
 				valid_ports[device] = false;
+				continue;
+			}
 		}
 
 		// Step 11: Initialize Device Drivers
@@ -168,7 +237,7 @@ namespace Kernel::Input
 			if (!valid_ports[device])
 				continue;
 			if (auto res = initialize_device(device); res.is_error())
-				dprintln("{}", res.error());
+				dwarnln_if(DEBUG_PS2, "PS/2 device initialization failed: {}", res.error());
 		}
 
 		if (m_devices[0])
@@ -184,11 +253,11 @@ namespace Kernel::Input
 			config |= PS2::Config::INTERRUPT_SECOND_PORT;
 		}
 
-		controller_send_command(PS2::Command::WRITE_CONFIG, config);
+		TRY(send_command(PS2::Command::WRITE_CONFIG, config));
 
 		for (uint8_t device = 0; device < 2; device++)
 		{
-			if (m_devices[device] == nullptr)
+			if (!m_devices[device])
 				continue;
 			m_devices[device]->send_initialize();
 			DevFileSystem::get().add_device(m_devices[device]);
@@ -200,13 +269,13 @@ namespace Kernel::Input
 	BAN::ErrorOr<void> PS2Controller::initialize_device(uint8_t device)
 	{
 		TRY(device_send_byte(device, PS2::DeviceCommand::IDENTIFY));
-		TRY(device_wait_ack());
+		TRY(device_read_ack(device));
 
 		uint8_t bytes[2] {};
 		uint8_t index = 0;
 		for (uint8_t i = 0; i < 2; i++)
 		{
-			auto res = device_read_byte();
+			auto res = read_byte();
 			if (res.is_error())
 				break;
 			bytes[index++] = res.value();
@@ -214,37 +283,43 @@ namespace Kernel::Input
 
 		// Standard PS/2 Mouse
 		if (index == 1 && (bytes[0] == 0x00))
+		{
+			dprintln_if(DEBUG_PS2, "PS/2 found mouse");
 			m_devices[device] = TRY(PS2Mouse::create(*this));
+		}
 		// MF2 Keyboard
 		else if (index == 2 && (bytes[0] == 0xAB && bytes[1] == 0x83))
+		{
+			dprintln_if(DEBUG_PS2, "PS/2 found keyboard");
 			m_devices[device] = TRY(PS2Keyboard::create(*this));
+		}
 
 		if (m_devices[device])
 			return {};
 
-		return BAN::Error::from_error_code(ErrorCode::PS2_UnsupportedDevice);
+		dprintln_if(DEBUG_PS2, "PS/2 unsupported device {2H} {2H} ({} bytes) on port {}", bytes[0], bytes[1], index, device);
-	}
+		return BAN::Error::from_errno(ENOTSUP);
-
-	void PS2Controller::send_byte(const PS2Device* device, uint8_t byte)
-	{
-		ASSERT(device != nullptr && (device == m_devices[0] || device == m_devices[1]));
-		uint8_t device_index = (device == m_devices[0]) ? 0 : 1;
-		MUST(device_send_byte(device_index, byte));
 	}
 
 	BAN::ErrorOr<void> PS2Controller::reset_device(uint8_t device)
 	{
 		TRY(device_send_byte(device, PS2::DeviceCommand::RESET));
-		TRY(device_wait_ack());
+		TRY(device_read_ack(device));
-		if (TRY(device_read_byte()) != PS2::Response::SELF_TEST_PASS)
+		if (TRY(read_byte()) != PS2::Response::SELF_TEST_PASS)
-			return BAN::Error::from_error_code(ErrorCode::PS2_Reset);
+		{
+			dwarnln_if(DEBUG_PS2, "PS/2 device self test failed");
+			return BAN::Error::from_errno(ENODEV);
+		}
+		// device might send extra data
+		while (!read_byte().is_error())
+			continue;
 		return {};
 	}
 
 	BAN::ErrorOr<void> PS2Controller::set_scanning(uint8_t device, bool enabled)
 	{
 		TRY(device_send_byte(device, enabled ? PS2::DeviceCommand::ENABLE_SCANNING : PS2::DeviceCommand::DISABLE_SCANNING));
-		TRY(device_wait_ack());
+		TRY(device_read_ack(device));
 		return {};
 	}
 

kernel/kernel/Input/PS2/Device.cpp

@@ -15,28 +15,39 @@ namespace Kernel::Input
 		, m_controller(controller)
 	{ }
 
-	bool PS2Device::append_command_queue(uint8_t command)
+	bool PS2Device::append_command_queue(uint8_t command, uint8_t response_size)
 	{
+		CriticalScope _;
 		if (m_command_queue.size() + 1 >= m_command_queue.capacity())
 		{
 			dprintln("PS/2 command queue full");
 			return false;
 		}
-		m_command_queue.push(command);
+		m_command_queue.push(Command {
-		update();
+			.out_data	= { command, 0x00 },
+			.out_count	= 1,
+			.in_count	= response_size,
+			.send_index	= 0
+		});
+		update_command();
 		return true;
 	}
 
-	bool PS2Device::append_command_queue(uint8_t command, uint8_t data)
+	bool PS2Device::append_command_queue(uint8_t command, uint8_t data, uint8_t response_size)
 	{
-		if (m_command_queue.size() + 2 >= m_command_queue.capacity())
+		CriticalScope _;
+		if (m_command_queue.size() + 1 >= m_command_queue.capacity())
 		{
 			dprintln("PS/2 command queue full");
 			return false;
 		}
-		m_command_queue.push(command);
+		m_command_queue.push(Command {
-		m_command_queue.push(data);
+			.out_data	= { command, data },
-		update();
+			.out_count	= 2,
+			.in_count	= response_size,
+			.send_index	= 0
+		});
+		update_command();
 		return true;
 	}
 
@@ -44,8 +55,6 @@ namespace Kernel::Input
 	{
 		uint8_t byte = IO::inb(PS2::IOPort::DATA);
 
-		// NOTE: This implementation does not allow using commands
-		//       that respond with more bytes than ACK
 		switch (m_state)
 		{
 			case State::WaitingAck:
@@ -53,9 +62,20 @@ namespace Kernel::Input
 				switch (byte)
 				{
 					case PS2::Response::ACK:
+					{
+						auto& command = m_command_queue.front();
+						if (++command.send_index < command.out_count)
+							m_state = State::Normal;
+						else if (command.in_count > 0)
+							m_state = State::WaitingResponse;
+						else
+						{
 							m_command_queue.pop();
 							m_state = State::Normal;
+							m_controller.unlock_command(this);
+						}
 						break;
+					}
 					case PS2::Response::RESEND:
 						m_state = State::Normal;
 						break;
@@ -65,6 +85,17 @@ namespace Kernel::Input
 				}
 				break;
 			}
+			case State::WaitingResponse:
+			{
+				if (--m_command_queue.front().in_count <= 0)
+				{
+					m_command_queue.pop();
+					m_state = State::Normal;
+					m_controller.unlock_command(this);
+				}
+				handle_byte(byte);
+				break;
+			}
 			case State::Normal:
 			{
 				handle_byte(byte);
@@ -72,17 +103,28 @@ namespace Kernel::Input
 			}
 		}
 
-		update();
+		update_command();
 	}
 
-	void PS2Device::update()
+	void PS2Device::update_command()
 	{
-		if (m_state == State::WaitingAck)
+		ASSERT(!interrupts_enabled());
+
+		if (m_state != State::Normal)
 			return;
 		if (m_command_queue.empty())
 			return;
+
+		const auto& command = m_command_queue.front();
+		ASSERT(command.send_index < command.out_count);
+
+		if (!m_controller.lock_command(this))
+			return;
+
 		m_state = State::WaitingAck;
-		m_controller.send_byte(this, m_command_queue.front());
+		auto ret = m_controller.device_send_byte(this, command.out_data[command.send_index]);
+		if (ret.is_error())
+			dwarnln("Could not send byte to device: {}", ret.error());
 	}
 
 }

kernel/kernel/Input/PS2/Keyboard.cpp

@@ -25,9 +25,9 @@ namespace Kernel::Input
 
 	void PS2Keyboard::send_initialize()
 	{
-		append_command_queue(Command::SET_LEDS, 0x00);
+		append_command_queue(Command::SET_LEDS, 0x00, 0);
-		append_command_queue(Command::SCANCODE, PS2::KBScancode::SET_SCANCODE_SET2);
+		append_command_queue(Command::SCANCODE, PS2::KBScancode::SET_SCANCODE_SET2, 0);
-		append_command_queue(PS2::DeviceCommand::ENABLE_SCANNING);
+		append_command_queue(PS2::DeviceCommand::ENABLE_SCANNING, 0);
 	}
 
 	void PS2Keyboard::handle_device_command_response(uint8_t byte)
@@ -148,7 +148,7 @@ namespace Kernel::Input
 			new_leds |= PS2::KBLeds::NUM_LOCK;
 		if (m_modifiers & (uint8_t)Input::KeyEvent::Modifier::CapsLock)
 			new_leds |= PS2::KBLeds::CAPS_LOCK;
-		append_command_queue(Command::SET_LEDS, new_leds);
+		append_command_queue(Command::SET_LEDS, new_leds, 0);
 	}
 
 	BAN::ErrorOr<size_t> PS2Keyboard::read_impl(off_t, BAN::ByteSpan buffer)

kernel/kernel/Input/PS2/Mouse.cpp

@@ -26,10 +26,10 @@ namespace Kernel::Input
 	void PS2Mouse::send_initialize()
 	{
 		// Query extensions
-		append_command_queue(Command::SET_SAMPLE_RATE, 200);
+		append_command_queue(Command::SET_SAMPLE_RATE, 200, 0);
-		append_command_queue(Command::SET_SAMPLE_RATE, 100);
+		append_command_queue(Command::SET_SAMPLE_RATE, 100, 0);
-		append_command_queue(Command::SET_SAMPLE_RATE, 80);
+		append_command_queue(Command::SET_SAMPLE_RATE, 80, 0);
-		append_command_queue(PS2::DeviceCommand::IDENTIFY);
+		append_command_queue(PS2::DeviceCommand::IDENTIFY, 1);
 	}
 
 	void PS2Mouse::initialize_extensions(uint8_t byte)
@@ -48,10 +48,10 @@ namespace Kernel::Input
 				else
 				{
 					m_mouse_id = 0x03;
-					append_command_queue(Command::SET_SAMPLE_RATE, 200);
+					append_command_queue(Command::SET_SAMPLE_RATE, 200, 0);
-					append_command_queue(Command::SET_SAMPLE_RATE, 200);
+					append_command_queue(Command::SET_SAMPLE_RATE, 200, 0);
-					append_command_queue(Command::SET_SAMPLE_RATE, 80);
+					append_command_queue(Command::SET_SAMPLE_RATE, 80, 0);
-					append_command_queue(PS2::DeviceCommand::IDENTIFY);
+					append_command_queue(PS2::DeviceCommand::IDENTIFY, 1);
 				}
 				break;
 			case 0x04:
@@ -65,8 +65,8 @@ namespace Kernel::Input
 
 		if (m_enabled)
 		{
-			append_command_queue(Command::SET_SAMPLE_RATE, 100);
+			append_command_queue(Command::SET_SAMPLE_RATE, 100, 0);
-			append_command_queue(PS2::DeviceCommand::ENABLE_SCANNING);
+			append_command_queue(PS2::DeviceCommand::ENABLE_SCANNING, 0);
 		}
 	}