serenity/Kernel/Devices/PS2MouseDevice.h

46 lines
1.3 KiB
C++

#pragma once
#include <AK/CircularQueue.h>
#include <Kernel/Devices/CharacterDevice.h>
#include <Kernel/IRQHandler.h>
#include <Kernel/MousePacket.h>
class PS2MouseDevice final : public IRQHandler
, public CharacterDevice {
public:
PS2MouseDevice();
virtual ~PS2MouseDevice() override;
static PS2MouseDevice& the();
// ^CharacterDevice
virtual bool can_read(FileDescription&) const override;
virtual ssize_t read(FileDescription&, u8*, ssize_t) override;
virtual ssize_t write(FileDescription&, const u8*, ssize_t) override;
virtual bool can_write(FileDescription&) const override { return true; }
private:
// ^IRQHandler
virtual void handle_irq() override;
// ^CharacterDevice
virtual const char* class_name() const override { return "PS2MouseDevice"; }
void initialize();
void check_device_presence();
void initialize_device();
void prepare_for_input();
void prepare_for_output();
void mouse_write(u8);
u8 mouse_read();
void wait_then_write(u8 port, u8 data);
u8 wait_then_read(u8 port);
void parse_data_packet();
void expect_ack();
bool m_device_present { false };
CircularQueue<MousePacket, 100> m_queue;
u8 m_data_state { 0 };
u8 m_data[4];
bool m_has_wheel { false };
};