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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/Devices/HID/HIDManagement.h>
#include <Kernel/Devices/HID/MouseDevice.h>
namespace Kernel {
MouseDevice::MouseDevice()
: HIDDevice(10, HIDManagement::the().generate_minor_device_number_for_mouse())
{
}
MouseDevice::~MouseDevice()
{
}
bool MouseDevice::can_read(const FileDescription&, size_t) const
{
ScopedSpinLock lock(m_queue_lock);
return !m_queue.is_empty();
}
KResultOr<size_t> MouseDevice::read(FileDescription&, 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;
ScopedSpinLock lock(m_queue_lock);
while (!m_queue.is_empty() && remaining_space_in_buffer) {
auto packet = m_queue.dequeue();
lock.unlock();
dbgln_if(MOUSE_DEBUG, "Mouse Read: Buttons {:x}", packet.buttons);
dbgln_if(MOUSE_DEBUG, "PS2 Mouse: X {}, Y {}, Z {}, Relative {}", packet.x, packet.y, packet.z, packet.buttons);
dbgln_if(MOUSE_DEBUG, "PS2 Mouse Read: Filter packets");
size_t bytes_read_from_packet = min(remaining_space_in_buffer, sizeof(MousePacket));
if (!buffer.write(&packet, nread, bytes_read_from_packet))
return EFAULT;
nread += bytes_read_from_packet;
remaining_space_in_buffer -= bytes_read_from_packet;
lock.lock();
}
return nread;
}
KResultOr<size_t> MouseDevice::write(FileDescription&, u64, const UserOrKernelBuffer&, size_t)
{
return 0;
}
}
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