mirror of
https://github.com/RGBCube/serenity
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117 lines
3.4 KiB
C++
117 lines
3.4 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/ByteBuffer.h>
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#include <AK/Singleton.h>
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#include <AK/Types.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/Sections.h>
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#include <Kernel/TTY/ConsoleManagement.h>
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#include <Kernel/WorkQueue.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) || m_modifiers == (Mod_Ctrl | 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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ConsoleManagement::the().switch_to_debug();
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Scheduler::dump_scheduler_state(m_modifiers == (Mod_Ctrl | Mod_Alt | Mod_Shift));
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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) != 0 && ch >= 2 && ch <= ConsoleManagement::s_max_virtual_consoles + 1) {
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g_io_work->queue([ch]() {
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ConsoleManagement::the().switch_to(ch - 0x02);
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});
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}
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key_state_changed(ch, pressed);
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}
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}
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bool 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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return 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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