mirror of
https://github.com/RGBCube/serenity
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8293b22361
Our current implementation does not work in the special case in which both shift keys are pressed, and then only one of the keys is released, as this would result in writing lower case letters, instead of the expected upper case letters. This commit fixes that by keeping track of the amount of shift keys that are pressed (instead of if any are at all), and only switching to the unshifted keymap once all of them are released.
123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, 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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#include <AK/Assertions.h>
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#include <AK/ByteBuffer.h>
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#include <AK/Singleton.h>
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#include <AK/StringView.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/x86/CPU.h>
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#include <Kernel/Debug.h>
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#include <Kernel/Devices/HID/HIDManagement.h>
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#include <Kernel/Devices/HID/PS2KeyboardDevice.h>
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#include <Kernel/IO.h>
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#include <Kernel/TTY/VirtualConsole.h>
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namespace Kernel {
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#define IRQ_KEYBOARD 1
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void PS2KeyboardDevice::irq_handle_byte_read(u8 byte)
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{
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u8 ch = byte & 0x7f;
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bool pressed = !(byte & 0x80);
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m_entropy_source.add_random_event(byte);
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if (byte == 0xe0) {
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m_has_e0_prefix = true;
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return;
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}
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if (m_modifiers == (Mod_Alt | Mod_Shift) && byte == 0x58) {
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// Alt+Shift+F12 pressed, dump some kernel state to the debug console.
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Scheduler::dump_scheduler_state();
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}
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dbgln_if(KEYBOARD_DEBUG, "Keyboard::irq_handle_byte_read: {:#02x} {}", ch, (pressed ? "down" : "up"));
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switch (ch) {
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case 0x38:
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if (m_has_e0_prefix)
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update_modifier(Mod_AltGr, pressed);
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else
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update_modifier(Mod_Alt, pressed);
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break;
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case 0x1d:
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update_modifier(Mod_Ctrl, pressed);
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break;
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case 0x5b:
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update_modifier(Mod_Super, pressed);
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break;
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case 0x2a:
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case 0x36:
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if (m_both_shift_keys_pressed)
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m_both_shift_keys_pressed = false;
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else if ((m_modifiers & Mod_Shift) != 0 && pressed)
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m_both_shift_keys_pressed = true;
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else
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update_modifier(Mod_Shift, pressed);
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break;
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}
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switch (ch) {
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case I8042_ACK:
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break;
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default:
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if (m_modifiers & Mod_Alt) {
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switch (ch) {
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case 0x02 ... 0x07: // 1 to 6
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VirtualConsole::switch_to(ch - 0x02);
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break;
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default:
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key_state_changed(ch, pressed);
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break;
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}
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} else {
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key_state_changed(ch, pressed);
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}
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}
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}
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void PS2KeyboardDevice::handle_irq(const RegisterState&)
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{
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// The controller will read the data and call irq_handle_byte_read
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// for the appropriate device
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m_i8042_controller->irq_process_input_buffer(HIDDevice::Type::Keyboard);
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}
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UNMAP_AFTER_INIT RefPtr<PS2KeyboardDevice> PS2KeyboardDevice::try_to_initialize(const I8042Controller& ps2_controller)
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{
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auto device = adopt_ref(*new PS2KeyboardDevice(ps2_controller));
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if (device->initialize())
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return device;
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return nullptr;
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}
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UNMAP_AFTER_INIT bool PS2KeyboardDevice::initialize()
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{
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if (!m_i8042_controller->reset_device(HIDDevice::Type::Keyboard)) {
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dbgln("KeyboardDevice: I8042 controller failed to reset device");
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return false;
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}
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return true;
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}
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// FIXME: UNMAP_AFTER_INIT might not be correct, because in practice PS/2 devices
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// are hot pluggable.
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UNMAP_AFTER_INIT PS2KeyboardDevice::PS2KeyboardDevice(const I8042Controller& ps2_controller)
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: IRQHandler(IRQ_KEYBOARD)
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, KeyboardDevice()
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, I8042Device(ps2_controller)
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{
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}
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// FIXME: UNMAP_AFTER_INIT might not be correct, because in practice PS/2 devices
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// are hot pluggable.
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UNMAP_AFTER_INIT PS2KeyboardDevice::~PS2KeyboardDevice()
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{
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}
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}
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