mirror of
https://github.com/RGBCube/serenity
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8e3e3a71cb
The end goal of this commit is to allow to boot on bare metal with no PS/2 device connected to the system. It turned out that the original code relied on the existence of the PS/2 keyboard, so VirtualConsole called it even though ACPI indicated the there's no i8042 controller on my real machine because I didn't plug any PS/2 device. The code is much more flexible, so adding HID support for other type of hardware (e.g. USB HID) could be much simpler. Briefly describing the change, we have a new singleton called HIDManagement, which is responsible to initialize the i8042 controller if exists, and to enumerate its devices. I also abstracted a bit things, so now every Human interface device is represented with the HIDDevice class. Then, there are 2 types of it - the MouseDevice and KeyboardDevice classes; both are responsible to handle the interface in the DevFS. PS2KeyboardDevice, PS2MouseDevice and VMWareMouseDevice classes are responsible for handling the hardware-specific interface they are assigned to. Therefore, they are inheriting from the IRQHandler class.
136 lines
4 KiB
C++
136 lines
4 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 <AK/RefCounted.h>
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#include <Kernel/Devices/HID/KeyboardDevice.h>
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#include <Kernel/Devices/HID/MouseDevice.h>
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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 I8042Controller;
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class I8042Device {
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public:
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virtual ~I8042Device() = default;
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virtual void irq_handle_byte_read(u8 byte) = 0;
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protected:
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explicit I8042Device(const I8042Controller& ps2_controller)
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: m_i8042_controller(ps2_controller)
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{
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}
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NonnullRefPtr<I8042Controller> m_i8042_controller;
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};
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class PS2KeyboardDevice;
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class PS2MouseDevice;
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class I8042Controller : public RefCounted<I8042Controller> {
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friend class PS2KeyboardDevice;
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friend class PS2MouseDevice;
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public:
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static NonnullRefPtr<I8042Controller> initialize();
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void detect_devices();
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bool reset_device(HIDDevice::Type 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(HIDDevice::Type 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(HIDDevice::Type 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(HIDDevice::Type 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(HIDDevice::Type);
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void irq_process_input_buffer(HIDDevice::Type);
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RefPtr<MouseDevice> mouse() const;
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RefPtr<KeyboardDevice> keyboard() const;
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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(HIDDevice::Type);
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u8 do_send_command(HIDDevice::Type type, u8 data);
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u8 do_send_command(HIDDevice::Type device, u8 command, u8 data);
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u8 do_write_to_device(HIDDevice::Type device, u8 data);
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u8 do_read_from_device(HIDDevice::Type 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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SpinLock<u8> m_lock;
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bool m_first_port_available { false };
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bool m_second_port_available { false };
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bool m_is_dual_channel { false };
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RefPtr<MouseDevice> m_mouse_device;
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RefPtr<KeyboardDevice> m_keyboard_device;
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};
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}
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