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https://github.com/RGBCube/serenity
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aee4786d8e
This singleton simplifies many aspects that we struggled with before: 1. There's no need to make derived classes of Device expose the constructor as public anymore. The singleton is a friend of them, so he can call the constructor. This solves the issue with try_create_device helper neatly, hopefully for good. 2. Getting a reference of the NullDevice is now being done from this singleton, which means that NullDevice no longer needs to use its own singleton, and we can apply the try_create_device helper on it too :) 3. We can now defer registration completely after the Device constructor which means the Device constructor is merely assigning the major and minor numbers of the Device, and the try_create_device helper ensures it calls the after_inserting method immediately after construction. This creates a great opportunity to make registration more OOM-safe.
63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/CircularQueue.h>
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#include <Kernel/API/MousePacket.h>
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#include <Kernel/Devices/HID/I8042Controller.h>
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#include <Kernel/Devices/HID/MouseDevice.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Random.h>
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namespace Kernel {
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class PS2MouseDevice : public IRQHandler
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, public MouseDevice
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, public I8042Device {
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friend class DeviceManagement;
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public:
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static RefPtr<PS2MouseDevice> try_to_initialize(const I8042Controller&);
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bool initialize();
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virtual ~PS2MouseDevice() override;
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virtual StringView purpose() const override { return class_name(); }
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// ^I8042Device
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virtual void irq_handle_byte_read(u8 byte) override;
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virtual void enable_interrupts() override
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{
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enable_irq();
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}
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protected:
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explicit PS2MouseDevice(const I8042Controller&);
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// ^IRQHandler
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virtual bool handle_irq(const RegisterState&) override;
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struct RawPacket {
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union {
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u32 dword;
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u8 bytes[4];
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};
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};
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u8 read_from_device();
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u8 send_command(u8 command);
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u8 send_command(u8 command, u8 data);
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MousePacket parse_data_packet(const RawPacket&);
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void set_sample_rate(u8);
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u8 get_device_id();
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u8 m_data_state { 0 };
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RawPacket m_data;
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bool m_has_wheel { false };
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bool m_has_five_buttons { false };
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};
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}
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