mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 00:22:43 +00:00
af0b2d1d86
Random now gets entropy from the following drivers: - KeyboardDevice - PATAChannel - PS2MouseDevice - E1000NetworkAdapter - RTL8139NetworkAdapter Of these devices, PS2MouseDevice and PATAChannel provide the vast majority of the entropy.
84 lines
3 KiB
C++
84 lines
3 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/CircularQueue.h>
|
|
#include <Kernel/Devices/CharacterDevice.h>
|
|
#include <Kernel/Interrupts/IRQHandler.h>
|
|
#include <Kernel/MousePacket.h>
|
|
#include <Kernel/Random.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class PS2MouseDevice final : public IRQHandler
|
|
, public CharacterDevice {
|
|
public:
|
|
PS2MouseDevice();
|
|
virtual ~PS2MouseDevice() override;
|
|
|
|
static PS2MouseDevice& the();
|
|
|
|
// ^CharacterDevice
|
|
virtual bool can_read(const FileDescription&, size_t) const override;
|
|
virtual ssize_t read(FileDescription&, size_t, u8*, ssize_t) override;
|
|
virtual ssize_t write(FileDescription&, size_t, const u8*, ssize_t) override;
|
|
virtual bool can_write(const FileDescription&, size_t) const override { return true; }
|
|
|
|
virtual const char* purpose() const override { return class_name(); }
|
|
|
|
private:
|
|
// ^IRQHandler
|
|
void handle_vmmouse_absolute_pointer();
|
|
virtual void handle_irq(const RegisterState&) 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();
|
|
void set_sample_rate(u8);
|
|
u8 get_device_id();
|
|
|
|
bool m_device_present { false };
|
|
CircularQueue<MousePacket, 100> m_queue;
|
|
u8 m_data_state { 0 };
|
|
u8 m_data[4];
|
|
bool m_has_wheel { false };
|
|
bool m_has_five_buttons { false };
|
|
EntropySource m_entropy_source;
|
|
};
|
|
|
|
}
|