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https://github.com/LadybirdBrowser/ladybird.git
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b91df26d4a
If we are in a shared interrupt handler, the called handlers might indicate it was not their interrupt, so we should not increment the call counter of these handlers.
117 lines
2.8 KiB
C++
117 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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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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bool 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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