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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Devices/HID/VMWareMouseDevice.h>
#include <Kernel/Devices/VMWareBackdoor.h>
#include <Kernel/Sections.h>
namespace Kernel {
UNMAP_AFTER_INIT ErrorOr<NonnullRefPtr<VMWareMouseDevice>> VMWareMouseDevice::try_to_initialize(const I8042Controller& ps2_controller)
{
// FIXME: return the correct error
if (!VMWareBackdoor::the())
return Error::from_errno(EIO);
if (!VMWareBackdoor::the()->vmmouse_is_absolute())
return Error::from_errno(EIO);
auto mouse_device = TRY(DeviceManagement::try_create_device<VMWareMouseDevice>(ps2_controller));
TRY(mouse_device->initialize());
return mouse_device;
}
void VMWareMouseDevice::irq_handle_byte_read(u8)
{
auto backdoor = VMWareBackdoor::the();
VERIFY(backdoor);
VERIFY(backdoor->vmmouse_is_absolute());
// We will receive 4 bytes from the I8042 controller that we are going to
// ignore. Instead, we will check with VMWareBackdoor to see how many bytes
// of mouse event data are waiting for us. For each multiple of 4, we
// produce a mouse packet.
constexpr u8 max_iterations = 128;
u8 current_iteration = 0;
while (++current_iteration < max_iterations) {
auto number_of_mouse_event_bytes = backdoor->read_mouse_status_queue_size();
if (number_of_mouse_event_bytes == 0)
break;
VERIFY(number_of_mouse_event_bytes % 4 == 0);
auto mouse_packet = backdoor->receive_mouse_packet();
m_entropy_source.add_random_event(mouse_packet);
{
SpinlockLocker lock(m_queue_lock);
m_queue.enqueue(mouse_packet);
}
}
evaluate_block_conditions();
}
VMWareMouseDevice::VMWareMouseDevice(const I8042Controller& ps2_controller)
: PS2MouseDevice(ps2_controller)
{
}
VMWareMouseDevice::~VMWareMouseDevice() = default;
}
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