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c8f27d7cb8
This scan code set is more advanced than the basic scan code set 1, and is required to be supported for some bare metal hardware that might not properly enable the PS2 first port translation in the i8042 controller. LibWeb can now also generate bindings for keyboard events like the Pause key, as well as other function keys (such as Right Alt, etc). The logic for handling scan code sets is implemented by the PS2 keyboard driver and is abstracted from the main HID KeyboardDevice code which only handles "standard" KeyEvent(s).
64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2023, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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#include <Kernel/API/KeyCode.h>
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#include <Kernel/Bus/SerialIO/Device.h>
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#include <Kernel/Devices/HID/Definitions.h>
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#include <Kernel/Devices/HID/KeyboardDevice.h>
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#include <Kernel/Security/Random.h>
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namespace Kernel {
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class PS2KeyboardDevice final : public SerialIODevice {
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friend class DeviceManagement;
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public:
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static ErrorOr<NonnullOwnPtr<PS2KeyboardDevice>> try_to_initialize(SerialIOController const&, SerialIOController::PortIndex port_index, ScanCodeSet scan_code_set, KeyboardDevice const&);
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virtual ~PS2KeyboardDevice() override;
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ErrorOr<void> initialize();
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// ^SerialIODevice
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virtual void handle_byte_read_from_serial_input(u8 byte) override;
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private:
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PS2KeyboardDevice(SerialIOController const&, SerialIOController::PortIndex port_index, ScanCodeSet scan_code_set, KeyboardDevice const&);
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RawKeyEvent generate_raw_key_event_input_from_set1(ScanCodeEvent);
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Optional<RawKeyEvent> generate_raw_key_event_input_from_set2(ScanCodeEvent);
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void handle_scan_code_input_event(ScanCodeEvent event);
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void handle_byte_read_for_scan_code_set1(u8 byte);
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void handle_byte_read_for_scan_code_set2(u8 byte);
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// NOTE: This boolean variable is only used with ScanCodeSet::Set1
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// because it only has one prefix defined in the scan code set.
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bool m_has_e0_prefix { false };
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// NOTE: This array and its counter are used only when m_scan_code_set
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// is set to ScanCodeSet::Set2, because that scan code requires us to
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// manage scan codes with multiple bytes.
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// According to the scan code set 2 table, a key press (or release)
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// can generate up to 8 bytes.
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Array<u8, 8> m_received_bytes;
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size_t m_received_bytes_count { 0 };
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bool m_left_shift_pressed { false };
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bool m_right_shift_pressed { false };
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bool m_left_super_pressed { false };
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bool m_right_super_pressed { false };
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NonnullRefPtr<KeyboardDevice> const m_keyboard_device;
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ScanCodeSet const m_scan_code_set { ScanCodeSet::Set1 };
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EntropySource m_entropy_source;
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};
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}
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