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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.
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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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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#include <Kernel/Devices/HID/VMWareMouseDevice.h>
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#include <Kernel/Devices/VMWareBackdoor.h>
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namespace Kernel {
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UNMAP_AFTER_INIT RefPtr<VMWareMouseDevice> VMWareMouseDevice::try_to_initialize(const I8042Controller& ps2_controller)
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{
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if (!VMWareBackdoor::the())
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return {};
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if (!VMWareBackdoor::the()->vmmouse_is_absolute())
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return {};
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auto device = adopt(*new VMWareMouseDevice(ps2_controller));
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if (device->initialize())
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return device;
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return {};
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}
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void VMWareMouseDevice::irq_handle_byte_read(u8)
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{
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VERIFY(VMWareBackdoor::the());
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VERIFY(VMWareBackdoor::the()->vmmouse_is_absolute());
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// We won't receive complete packets with the backdoor enabled,
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// we will only get one byte for each event, which we'll just
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// discard. If we were to wait until we *think* that we got a
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// full PS/2 packet then we would create a backlog in the VM
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// because we wouldn't read the appropriate number of mouse
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// packets from VMWareBackdoor.
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auto mouse_packet = VMWareBackdoor::the()->receive_mouse_packet();
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if (mouse_packet.has_value()) {
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m_entropy_source.add_random_event(mouse_packet.value());
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{
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ScopedSpinLock lock(m_queue_lock);
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m_queue.enqueue(mouse_packet.value());
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}
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evaluate_block_conditions();
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}
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return;
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}
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VMWareMouseDevice::VMWareMouseDevice(const I8042Controller& ps2_controller)
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: PS2MouseDevice(ps2_controller)
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{
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}
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VMWareMouseDevice::~VMWareMouseDevice()
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{
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}
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}
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