mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 11:42:45 +00:00
8a0a3638f0
This device will be used by userspace to read mouse packets from all mouse devices that are attached to the machine. This change is a preparation before we can enable seamless hotplug capabilities in WindowServer for mouse devices, without any major change on the userspace side.
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
|
|
* Copyright (c) 2021-2023, Liav A. <liavalb@hotmail.co.il>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/Devices/DeviceManagement.h>
|
|
#include <Kernel/Devices/HID/Management.h>
|
|
#include <Kernel/Devices/HID/MouseDevice.h>
|
|
|
|
namespace Kernel {
|
|
|
|
ErrorOr<NonnullRefPtr<MouseDevice>> MouseDevice::try_to_initialize()
|
|
{
|
|
return *TRY(DeviceManagement::try_create_device<MouseDevice>());
|
|
}
|
|
|
|
MouseDevice::MouseDevice()
|
|
: HIDDevice(10, HIDManagement::the().generate_minor_device_number_for_mouse())
|
|
{
|
|
}
|
|
|
|
void MouseDevice::handle_mouse_packet_input_event(MousePacket packet)
|
|
{
|
|
m_entropy_source.add_random_event(packet);
|
|
HIDManagement::the().enqueue_mouse_packet({}, packet);
|
|
{
|
|
SpinlockLocker lock(m_queue_lock);
|
|
m_queue.enqueue(packet);
|
|
}
|
|
evaluate_block_conditions();
|
|
}
|
|
|
|
MouseDevice::~MouseDevice() = default;
|
|
|
|
bool MouseDevice::can_read(OpenFileDescription const&, u64) const
|
|
{
|
|
SpinlockLocker lock(m_queue_lock);
|
|
return !m_queue.is_empty();
|
|
}
|
|
|
|
ErrorOr<size_t> MouseDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
|
|
{
|
|
VERIFY(size > 0);
|
|
size_t nread = 0;
|
|
size_t remaining_space_in_buffer = static_cast<size_t>(size) - nread;
|
|
SpinlockLocker lock(m_queue_lock);
|
|
while (!m_queue.is_empty() && remaining_space_in_buffer) {
|
|
auto packet = m_queue.dequeue();
|
|
|
|
dbgln_if(MOUSE_DEBUG, "Mouse Read: Buttons {:x}", packet.buttons);
|
|
dbgln_if(MOUSE_DEBUG, "Mouse: X {}, Y {}, Z {}, W {}, Relative {}", packet.x, packet.y, packet.z, packet.w, packet.buttons);
|
|
dbgln_if(MOUSE_DEBUG, "Mouse Read: Filter packets");
|
|
|
|
size_t bytes_read_from_packet = min(remaining_space_in_buffer, sizeof(MousePacket));
|
|
TRY(buffer.write(&packet, nread, bytes_read_from_packet));
|
|
nread += bytes_read_from_packet;
|
|
remaining_space_in_buffer -= bytes_read_from_packet;
|
|
}
|
|
return nread;
|
|
}
|
|
|
|
}
|