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https://github.com/RGBCube/serenity
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5d180d1f99
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
130 lines
3.6 KiB
C++
130 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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VERIFY(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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