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86 lines
3.1 KiB
C++
86 lines
3.1 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/Devices/CharacterDevice.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/API/MousePacket.h>
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#include <Kernel/Random.h>
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namespace Kernel {
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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 void create();
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static PS2MouseDevice& the();
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// ^CharacterDevice
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virtual bool can_read(const FileDescription&, size_t) const override;
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virtual KResultOr<size_t> read(FileDescription&, size_t, u8*, size_t) override;
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virtual KResultOr<size_t> write(FileDescription&, size_t, const u8*, size_t) override;
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virtual bool can_write(const FileDescription&, size_t) const override { return true; }
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virtual const char* purpose() const override { return class_name(); }
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private:
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// ^IRQHandler
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void handle_vmmouse_absolute_pointer();
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virtual void handle_irq(const RegisterState&) 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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void set_sample_rate(u8);
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u8 get_device_id();
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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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bool m_has_five_buttons { false };
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EntropySource m_entropy_source;
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};
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}
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