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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
* Copyright (c) 2021, Edwin Hoksberg <mail@edwinhoksberg.nl>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/CircularQueue.h>
#include <AK/DoublyLinkedList.h>
#include <AK/Types.h>
#include <Kernel/API/KeyCode.h>
#include <Kernel/Devices/CharacterDevice.h>
#include <Kernel/Devices/HID/HIDDevice.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Random.h>
namespace Kernel {
class KeyboardDevice : public HIDDevice {
public:
using Event = KeyEvent;
virtual ~KeyboardDevice() override;
// ^CharacterDevice
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
// ^HIDDevice
virtual Type instrument_type() const override { return Type::Keyboard; }
// ^File
virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
void update_modifier(u8 modifier, bool state)
{
if (state)
m_modifiers |= modifier;
else
m_modifiers &= ~modifier;
}
protected:
KeyboardDevice();
mutable Spinlock m_queue_lock;
CircularQueue<Event, 16> m_queue;
// ^CharacterDevice
virtual StringView class_name() const override { return "KeyboardDevice"sv; }
u8 m_modifiers { 0 };
bool m_caps_lock_to_ctrl_pressed { false };
bool m_caps_lock_on { false };
bool m_num_lock_on { false };
bool m_has_e0_prefix { false };
bool m_left_shift_pressed { false };
bool m_right_shift_pressed { false };
void key_state_changed(u8 raw, bool pressed);
};
}
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