mirror of
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.
77 lines
2.8 KiB
C++
77 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/HIDManagement.h>
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#include <Kernel/Devices/HID/MouseDevice.h>
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namespace Kernel {
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MouseDevice::MouseDevice()
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: HIDDevice(10, HIDManagement::the().generate_minor_device_number_for_mouse())
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{
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}
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MouseDevice::~MouseDevice()
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{
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}
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bool MouseDevice::can_read(const FileDescription&, size_t) const
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{
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ScopedSpinLock lock(m_queue_lock);
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return !m_queue.is_empty();
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}
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KResultOr<size_t> MouseDevice::read(FileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
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{
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VERIFY(size > 0);
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size_t nread = 0;
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size_t remaining_space_in_buffer = static_cast<size_t>(size) - nread;
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ScopedSpinLock lock(m_queue_lock);
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while (!m_queue.is_empty() && remaining_space_in_buffer) {
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auto packet = m_queue.dequeue();
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lock.unlock();
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dbgln_if(MOUSE_DEBUG, "Mouse Read: Buttons {:x}", packet.buttons);
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dbgln_if(MOUSE_DEBUG, "PS2 Mouse: X {}, Y {}, Z {}, Relative {}", packet.x, packet.y, packet.z, packet.buttons);
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dbgln_if(MOUSE_DEBUG, "PS2 Mouse Read: Filter packets");
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size_t bytes_read_from_packet = min(remaining_space_in_buffer, sizeof(MousePacket));
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if (!buffer.write(&packet, nread, bytes_read_from_packet))
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return EFAULT;
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nread += bytes_read_from_packet;
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remaining_space_in_buffer -= bytes_read_from_packet;
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lock.lock();
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}
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return nread;
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}
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KResultOr<size_t> MouseDevice::write(FileDescription&, u64, const UserOrKernelBuffer&, size_t)
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{
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return 0;
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}
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}
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