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https://github.com/RGBCube/serenity
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8e3e3a71cb
The end goal of this commit is to allow to boot on bare metal with no PS/2 device connected to the system. It turned out that the original code relied on the existence of the PS/2 keyboard, so VirtualConsole called it even though ACPI indicated the there's no i8042 controller on my real machine because I didn't plug any PS/2 device. The code is much more flexible, so adding HID support for other type of hardware (e.g. USB HID) could be much simpler. Briefly describing the change, we have a new singleton called HIDManagement, which is responsible to initialize the i8042 controller if exists, and to enumerate its devices. I also abstracted a bit things, so now every Human interface device is represented with the HIDDevice class. Then, there are 2 types of it - the MouseDevice and KeyboardDevice classes; both are responsible to handle the interface in the DevFS. PS2KeyboardDevice, PS2MouseDevice and VMWareMouseDevice classes are responsible for handling the hardware-specific interface they are assigned to. Therefore, they are inheriting from the IRQHandler class.
80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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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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 const char* 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 void 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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