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https://github.com/RGBCube/serenity
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1b2ef8582c
Asking a File if we could possibly read or write it will never mutate the asking FileDescription&, so it should be const.
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
#pragma once
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#include <AK/CircularQueue.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/IRQHandler.h>
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#include <Kernel/MousePacket.h>
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class PS2MouseDevice final : public IRQHandler
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, public CharacterDevice {
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public:
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PS2MouseDevice();
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virtual ~PS2MouseDevice() override;
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static PS2MouseDevice& the();
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// ^CharacterDevice
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virtual bool can_read(const FileDescription&) const override;
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virtual ssize_t read(FileDescription&, u8*, ssize_t) override;
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virtual ssize_t write(FileDescription&, const u8*, ssize_t) override;
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virtual bool can_write(const FileDescription&) const override { return true; }
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private:
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// ^IRQHandler
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virtual void handle_irq() override;
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// ^CharacterDevice
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virtual const char* class_name() const override { return "PS2MouseDevice"; }
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void initialize();
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void check_device_presence();
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void initialize_device();
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void prepare_for_input();
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void prepare_for_output();
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void mouse_write(u8);
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u8 mouse_read();
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void wait_then_write(u8 port, u8 data);
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u8 wait_then_read(u8 port);
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void parse_data_packet();
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void expect_ack();
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bool m_device_present { false };
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CircularQueue<MousePacket, 100> m_queue;
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u8 m_data_state { 0 };
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u8 m_data[4];
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bool m_has_wheel { false };
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};
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