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Kernel: Unify PS2Device to handle commands instead of inherited

This commit is contained in:
Bananymous 2024-01-04 10:43:14 +02:00
parent d2d12d5281
commit 8f8d6bddc0
5 changed files with 111 additions and 95 deletions
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4
kernel/include/kernel/Input/PS2Config.h
View File

@ -55,6 +55,7 @@ namespace Kernel::Input::PS2
TEST_CONTROLLER_PASS = 0x55,
SELF_TEST_PASS = 0xAA,
ACK = 0xFA,
RESEND = 0xFE,
};
enum DeviceCommand : uint8_t
@ -74,9 +75,6 @@ namespace Kernel::Input::PS2
enum KBResponse : uint8_t
{
KEY_ERROR_OR_BUFFER_OVERRUN1 = 0x00,
SELF_TEST_PASSED = 0xAA,
ECHO_RESPONSE = 0xEE,
RESEND = 0xFE,
KEY_ERROR_OR_BUFFER_OVERRUN2 = 0xFF,
};

26
kernel/include/kernel/Input/PS2Controller.h
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@ -1,23 +1,47 @@
#pragma once
#include <BAN/CircularQueue.h>
#include <kernel/Device/Device.h>
#include <kernel/InterruptController.h>
namespace Kernel::Input
{
class PS2Controller;
class PS2Device : public CharacterDevice, public Interruptable
{
public:
PS2Device();
PS2Device(PS2Controller&);
virtual ~PS2Device() {}
virtual void send_initialize() = 0;
bool append_command_queue(uint8_t command);
bool append_command_queue(uint8_t command, uint8_t data);
virtual void handle_irq() final override;
virtual void handle_byte(uint8_t) = 0;
virtual void handle_device_command_response(uint8_t) = 0;
virtual BAN::StringView name() const override { return m_name; }
protected:
void update();
private:
enum class State
{
Normal,
WaitingAck,
};
private:
const BAN::String m_name;
PS2Controller& m_controller;
State m_state = State::Normal;
BAN::CircularQueue<uint8_t, 10> m_command_queue;
};
class PS2Controller

24
kernel/include/kernel/Input/PS2Keyboard.h
View File

@ -1,6 +1,5 @@
#pragma once
#include <BAN/CircularQueue.h>
#include <kernel/Input/KeyEvent.h>
#include <kernel/Input/PS2Controller.h>
#include <kernel/Input/PS2Keymap.h>
@ -15,48 +14,31 @@ namespace Kernel::Input
enum Command : uint8_t
{
SET_LEDS = 0xED,
SCANCODE = 0xF0,
ENABLE_SCANNING = 0xF4,
DISABLE_SCANNING = 0xF5,
};
enum class State
{
Normal,
WaitingAck,
SCANCODE = 0xF0
};
public:
static BAN::ErrorOr<PS2Keyboard*> create(PS2Controller&);
virtual void send_initialize() override;
virtual void handle_irq() override;
virtual void update() override;
virtual void handle_byte(uint8_t) final override;
virtual void handle_device_command_response(uint8_t) final override;
private:
PS2Keyboard(PS2Controller& controller);
void append_command_queue(uint8_t);
void append_command_queue(uint8_t, uint8_t);
void buffer_has_key();
void update_leds();
private:
PS2Controller& m_controller;
uint8_t m_byte_buffer[10];
uint8_t m_byte_index { 0 };
uint8_t m_modifiers { 0 };
BAN::CircularQueue<KeyEvent, 10> m_event_queue;
BAN::CircularQueue<uint8_t, 10> m_command_queue;
PS2Keymap m_keymap;
State m_state { State::Normal };
Semaphore m_semaphore;
public:

73
kernel/kernel/Input/PS2Controller.cpp
View File

@ -68,11 +68,6 @@ namespace Kernel::Input
static PS2Controller* s_instance = nullptr;
PS2Device::PS2Device()
: CharacterDevice(0440, 0, 901)
, m_name(BAN::String::formatted("input{}", DevFileSystem::get().get_next_input_device()))
{ }
BAN::ErrorOr<void> PS2Controller::initialize()
{
ASSERT(s_instance == nullptr);
@ -253,4 +248,72 @@ namespace Kernel::Input
return {};
}
PS2Device::PS2Device(PS2Controller& controller)
: CharacterDevice(0440, 0, 901)
, m_name(BAN::String::formatted("input{}", DevFileSystem::get().get_next_input_device()))
, m_controller(controller)
{ }
bool PS2Device::append_command_queue(uint8_t command)
{
if (m_command_queue.size() + 1 >= m_command_queue.capacity())
return false;
m_command_queue.push(command);
return true;
}
bool PS2Device::append_command_queue(uint8_t command, uint8_t data)
{
if (m_command_queue.size() + 2 >= m_command_queue.capacity())
return false;
m_command_queue.push(command);
m_command_queue.push(data);
return true;
}
void PS2Device::handle_irq()
{
uint8_t byte = IO::inb(PS2::IOPort::DATA);
// NOTE: This implementation does not allow using commands
// that respond with more bytes than ACK
switch (m_state)
{
case State::WaitingAck:
{
switch (byte)
{
case PS2::Response::ACK:
m_command_queue.pop();
m_state = State::Normal;
break;
case PS2::Response::RESEND:
m_state = State::Normal;
break;
default:
handle_device_command_response(byte);
break;
}
break;
}
case State::Normal:
{
handle_byte(byte);
break;
}
}
update();
}
void PS2Device::update()
{
if (m_state == State::WaitingAck)
return;
if (m_command_queue.empty())
return;
m_state = State::WaitingAck;
m_controller.send_byte(this, m_command_queue.front());
}
}

79
kernel/kernel/Input/PS2Keyboard.cpp
View File

@ -23,89 +23,38 @@ namespace Kernel::Input
}
PS2Keyboard::PS2Keyboard(PS2Controller& controller)
: m_controller(controller)
: PS2Device(controller)
, m_rdev(makedev(DevFileSystem::get().get_next_dev(), 0))
{ }
void PS2Keyboard::handle_irq()
{
uint8_t byte = IO::inb(PS2::IOPort::DATA);
// NOTE: This implementation does not allow using commands
// that respond with more bytes than ACK
switch (m_state)
{
case State::WaitingAck:
{
switch (byte)
{
case PS2::Response::ACK:
m_command_queue.pop();
m_state = State::Normal;
break;
case PS2::KBResponse::RESEND:
m_state = State::Normal;
break;
case PS2::KBResponse::KEY_ERROR_OR_BUFFER_OVERRUN1:
case PS2::KBResponse::KEY_ERROR_OR_BUFFER_OVERRUN2:
dwarnln("Key detection error or internal buffer overrun");
break;
default:
dwarnln("Unhandeled byte {2H}", byte);
break;
}
break;
}
case State::Normal:
{
m_byte_buffer[m_byte_index++] = byte;
if (byte != 0xE0 && byte != 0xF0)
buffer_has_key();
break;
}
}
}
void PS2Keyboard::send_initialize()
{
append_command_queue(Command::SET_LEDS, 0x00);
append_command_queue(Command::SCANCODE, PS2::KBScancode::SET_SCANCODE_SET2);
append_command_queue(Command::ENABLE_SCANNING);
update();
}
void PS2Keyboard::update()
void PS2Keyboard::handle_device_command_response(uint8_t byte)
{
if (m_state == State::WaitingAck)
return;
if (m_command_queue.empty())
return;
m_state = State::WaitingAck;
m_controller.send_byte(this, m_command_queue.front());
}
void PS2Keyboard::append_command_queue(uint8_t byte)
{
if (m_command_queue.full())
switch (byte)
{
dwarnln("PS/2 command queue full");
return;
case PS2::KBResponse::KEY_ERROR_OR_BUFFER_OVERRUN1:
case PS2::KBResponse::KEY_ERROR_OR_BUFFER_OVERRUN2:
dwarnln("Key detection error or internal buffer overrun");
break;
default:
dwarnln("Unhandeled byte {2H}", byte);
break;
}
m_command_queue.push(byte);
}
void PS2Keyboard::append_command_queue(uint8_t byte1, uint8_t byte2)
void PS2Keyboard::handle_byte(uint8_t byte)
{
if (m_command_queue.size() + 2 > m_command_queue.capacity())
{
dwarnln("PS/2 command queue full");
m_byte_buffer[m_byte_index++] = byte;
if (byte == 0xE0 || byte == 0xF0)
return;
}
m_command_queue.push(byte1);
m_command_queue.push(byte2);
}
void PS2Keyboard::buffer_has_key()
{
uint32_t scancode = 0;
bool extended = false;
bool released = false;