mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 01:37:39 +03:00
91db31880f
Rework the PS/2 keyboard and mouse drivers to use a common 8042 controller driver. Also, reset and reconfigure the 8042 controller as they are not guaranteed to be in the state that we expect.
131 lines
3.6 KiB
C++
131 lines
3.6 KiB
C++
/*
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* Copyright (c) 2020, The SerenityOS developers.
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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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#pragma once
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#include <Kernel/SpinLock.h>
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namespace Kernel {
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#define I8042_BUFFER 0x60
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#define I8042_STATUS 0x64
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#define I8042_ACK 0xFA
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#define I8042_RESEND 0xFE
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#define I8042_BUFFER_FULL 0x01
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#define I8042_WHICH_BUFFER 0x20
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#define I8042_KEYBOARD_BUFFER 0x00
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#define I8042_MOUSE_BUFFER 0x20
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class I8042Device {
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public:
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virtual ~I8042Device() { }
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virtual void irq_handle_byte_read(u8 byte) = 0;
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virtual void enable_interrupts() = 0;
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};
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class I8042Controller {
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public:
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enum class Device {
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None = 0,
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Keyboard,
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Mouse
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};
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static void initialize();
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static I8042Controller& the();
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bool reset_device(Device device)
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{
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ScopedSpinLock lock(m_lock);
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return do_reset_device(device);
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}
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u8 send_command(Device device, u8 command)
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{
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ScopedSpinLock lock(m_lock);
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return do_send_command(device, command);
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}
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u8 send_command(Device device, u8 command, u8 data)
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{
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ScopedSpinLock lock(m_lock);
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return do_send_command(device, command, data);
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}
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u8 read_from_device(Device device)
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{
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ScopedSpinLock lock(m_lock);
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return do_read_from_device(device);
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}
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void wait_then_write(u8 port, u8 data)
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{
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ScopedSpinLock lock(m_lock);
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do_wait_then_write(port, data);
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}
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u8 wait_then_read(u8 port)
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{
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ScopedSpinLock lock(m_lock);
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return do_wait_then_read(port);
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}
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void prepare_for_output();
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void prepare_for_input(Device);
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void irq_process_input_buffer(Device);
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private:
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I8042Controller();
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void do_drain();
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bool do_reset_device(Device device);
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u8 do_send_command(Device device, u8 data);
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u8 do_send_command(Device device, u8 command, u8 data);
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u8 do_write_to_device(Device device, u8 data);
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u8 do_read_from_device(Device device);
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void do_wait_then_write(u8 port, u8 data);
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u8 do_wait_then_read(u8 port);
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static int device_to_deviceinfo_index(Device device)
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{
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ASSERT(device != Device::None);
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return (device == Device::Keyboard) ? 0 : 1;
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}
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struct DeviceInfo {
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I8042Device* device { nullptr };
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bool available { false };
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};
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SpinLock<u8> m_lock;
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bool m_is_dual_channel { false };
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DeviceInfo m_devices[2];
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};
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}
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