mirror of
https://github.com/RGBCube/serenity
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d3ce97e8b2
Some error indication was done by returning bool. This was changed to propagate the error by ErrorOr from the underlying functions. The returntype of the underlying functions was also changed to propagate the error.
60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Devices/DeviceManagement.h>
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#include <Kernel/Devices/HID/VMWareMouseDevice.h>
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#include <Kernel/Devices/VMWareBackdoor.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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UNMAP_AFTER_INIT ErrorOr<NonnullRefPtr<VMWareMouseDevice>> VMWareMouseDevice::try_to_initialize(const I8042Controller& ps2_controller)
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{
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// FIXME: return the correct error
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if (!VMWareBackdoor::the())
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return Error::from_errno(EIO);
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if (!VMWareBackdoor::the()->vmmouse_is_absolute())
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return Error::from_errno(EIO);
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auto mouse_device = TRY(DeviceManagement::try_create_device<VMWareMouseDevice>(ps2_controller));
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TRY(mouse_device->initialize());
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return mouse_device;
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}
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void VMWareMouseDevice::irq_handle_byte_read(u8)
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{
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auto backdoor = VMWareBackdoor::the();
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VERIFY(backdoor);
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VERIFY(backdoor->vmmouse_is_absolute());
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// We will receive 4 bytes from the I8042 controller that we are going to
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// ignore. Instead, we will check with VMWareBackdoor to see how many bytes
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// of mouse event data are waiting for us. For each multiple of 4, we
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// produce a mouse packet.
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constexpr u8 max_iterations = 128;
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u8 current_iteration = 0;
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while (++current_iteration < max_iterations) {
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auto number_of_mouse_event_bytes = backdoor->read_mouse_status_queue_size();
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if (number_of_mouse_event_bytes == 0)
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break;
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VERIFY(number_of_mouse_event_bytes % 4 == 0);
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auto mouse_packet = backdoor->receive_mouse_packet();
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m_entropy_source.add_random_event(mouse_packet);
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{
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SpinlockLocker lock(m_queue_lock);
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m_queue.enqueue(mouse_packet);
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}
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}
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evaluate_block_conditions();
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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() = default;
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}
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