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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/ByteBuffer.h>
#include <AK/Singleton.h>
#include <AK/StringView.h>
#include <AK/Types.h>
#include <Kernel/Arch/x86/CPU.h>
#include <Kernel/Debug.h>
#include <Kernel/Devices/HID/HIDManagement.h>
#include <Kernel/Devices/HID/PS2KeyboardDevice.h>
#include <Kernel/IO.h>
#include <Kernel/TTY/VirtualConsole.h>
namespace Kernel {
#define IRQ_KEYBOARD 1
void PS2KeyboardDevice::irq_handle_byte_read(u8 byte)
{
u8 ch = byte & 0x7f;
bool pressed = !(byte & 0x80);
m_entropy_source.add_random_event(byte);
if (byte == 0xe0) {
m_has_e0_prefix = true;
return;
}
if (m_modifiers == (Mod_Alt | Mod_Shift) && byte == 0x58) {
// Alt+Shift+F12 pressed, dump some kernel state to the debug console.
Scheduler::dump_scheduler_state();
}
dbgln_if(KEYBOARD_DEBUG, "Keyboard::irq_handle_byte_read: {:#02x} {}", ch, (pressed ? "down" : "up"));
switch (ch) {
case 0x38:
if (m_has_e0_prefix)
update_modifier(Mod_AltGr, pressed);
else
update_modifier(Mod_Alt, pressed);
break;
case 0x1d:
update_modifier(Mod_Ctrl, pressed);
break;
case 0x5b:
update_modifier(Mod_Super, pressed);
break;
case 0x2a:
case 0x36:
if (m_both_shift_keys_pressed)
m_both_shift_keys_pressed = false;
else if ((m_modifiers & Mod_Shift) != 0 && pressed)
m_both_shift_keys_pressed = true;
else
update_modifier(Mod_Shift, pressed);
break;
}
switch (ch) {
case I8042_ACK:
break;
default:
if (m_modifiers & Mod_Alt) {
switch (ch) {
case 0x02 ... 0x07: // 1 to 6
VirtualConsole::switch_to(ch - 0x02);
break;
default:
key_state_changed(ch, pressed);
break;
}
} else {
key_state_changed(ch, pressed);
}
}
}
void PS2KeyboardDevice::handle_irq(const RegisterState&)
{
// The controller will read the data and call irq_handle_byte_read
// for the appropriate device
m_i8042_controller->irq_process_input_buffer(HIDDevice::Type::Keyboard);
}
UNMAP_AFTER_INIT RefPtr<PS2KeyboardDevice> PS2KeyboardDevice::try_to_initialize(const I8042Controller& ps2_controller)
{
auto device = adopt_ref(*new PS2KeyboardDevice(ps2_controller));
if (device->initialize())
return device;
return nullptr;
}
UNMAP_AFTER_INIT bool PS2KeyboardDevice::initialize()
{
if (!m_i8042_controller->reset_device(HIDDevice::Type::Keyboard)) {
dbgln("KeyboardDevice: I8042 controller failed to reset device");
return false;
}
return true;
}
// FIXME: UNMAP_AFTER_INIT might not be correct, because in practice PS/2 devices
// are hot pluggable.
UNMAP_AFTER_INIT PS2KeyboardDevice::PS2KeyboardDevice(const I8042Controller& ps2_controller)
: IRQHandler(IRQ_KEYBOARD)
, KeyboardDevice()
, I8042Device(ps2_controller)
{
}
// FIXME: UNMAP_AFTER_INIT might not be correct, because in practice PS/2 devices
// are hot pluggable.
UNMAP_AFTER_INIT PS2KeyboardDevice::~PS2KeyboardDevice()
{
}
}
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