mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 08:02:44 +00:00
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.
130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
/*
|
|
* Copyright (c) 2020, The SerenityOS developers.
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <Kernel/SpinLock.h>
|
|
|
|
namespace Kernel {
|
|
|
|
#define I8042_BUFFER 0x60
|
|
#define I8042_STATUS 0x64
|
|
#define I8042_ACK 0xFA
|
|
#define I8042_RESEND 0xFE
|
|
#define I8042_BUFFER_FULL 0x01
|
|
|
|
#define I8042_WHICH_BUFFER 0x20
|
|
|
|
#define I8042_KEYBOARD_BUFFER 0x00
|
|
#define I8042_MOUSE_BUFFER 0x20
|
|
|
|
class I8042Device {
|
|
public:
|
|
virtual ~I8042Device() { }
|
|
|
|
virtual void irq_handle_byte_read(u8 byte) = 0;
|
|
virtual void enable_interrupts() = 0;
|
|
};
|
|
|
|
class I8042Controller {
|
|
public:
|
|
enum class Device {
|
|
None = 0,
|
|
Keyboard,
|
|
Mouse
|
|
};
|
|
|
|
static void initialize();
|
|
static I8042Controller& the();
|
|
|
|
bool reset_device(Device device)
|
|
{
|
|
ScopedSpinLock lock(m_lock);
|
|
return do_reset_device(device);
|
|
}
|
|
|
|
u8 send_command(Device device, u8 command)
|
|
{
|
|
ScopedSpinLock lock(m_lock);
|
|
return do_send_command(device, command);
|
|
}
|
|
u8 send_command(Device device, u8 command, u8 data)
|
|
{
|
|
ScopedSpinLock lock(m_lock);
|
|
return do_send_command(device, command, data);
|
|
}
|
|
|
|
u8 read_from_device(Device device)
|
|
{
|
|
ScopedSpinLock lock(m_lock);
|
|
return do_read_from_device(device);
|
|
}
|
|
|
|
void wait_then_write(u8 port, u8 data)
|
|
{
|
|
ScopedSpinLock lock(m_lock);
|
|
do_wait_then_write(port, data);
|
|
}
|
|
|
|
u8 wait_then_read(u8 port)
|
|
{
|
|
ScopedSpinLock lock(m_lock);
|
|
return do_wait_then_read(port);
|
|
}
|
|
|
|
void prepare_for_output();
|
|
void prepare_for_input(Device);
|
|
|
|
void irq_process_input_buffer(Device);
|
|
|
|
private:
|
|
I8042Controller();
|
|
void do_drain();
|
|
bool do_reset_device(Device device);
|
|
u8 do_send_command(Device device, u8 data);
|
|
u8 do_send_command(Device device, u8 command, u8 data);
|
|
u8 do_write_to_device(Device device, u8 data);
|
|
u8 do_read_from_device(Device device);
|
|
void do_wait_then_write(u8 port, u8 data);
|
|
u8 do_wait_then_read(u8 port);
|
|
|
|
static int device_to_deviceinfo_index(Device device)
|
|
{
|
|
ASSERT(device != Device::None);
|
|
return (device == Device::Keyboard) ? 0 : 1;
|
|
}
|
|
|
|
struct DeviceInfo {
|
|
I8042Device* device { nullptr };
|
|
bool available { false };
|
|
};
|
|
|
|
SpinLock<u8> m_lock;
|
|
bool m_is_dual_channel { false };
|
|
DeviceInfo m_devices[2];
|
|
};
|
|
|
|
}
|