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#include <Kernel/Devices/CharacterDevice.h>
#define SERIAL_COM1_ADDR 0x3F8
#define SERIAL_COM2_ADDR 0x2F8
#define SERIAL_COM3_ADDR 0x3E8
#define SERIAL_COM4_ADDR 0x2E8
class SerialDevice final : public CharacterDevice {
AK_MAKE_ETERNAL
public:
SerialDevice(int base_addr, unsigned minor);
virtual ~SerialDevice() override;
// ^CharacterDevice
virtual bool can_read(FileDescription&) const override;
virtual ssize_t read(FileDescription&, u8*, ssize_t) override;
virtual bool can_write(FileDescription&) const override;
virtual ssize_t write(FileDescription&, const u8*, ssize_t) override;
enum InterruptEnable {
LowPowerMode = 0x01 << 5,
SleepMode = 0x01 << 4,
ModemStatusInterrupt = 0x01 << 3,
ReceiverLineStatusInterrupt = 0x01 << 2,
TransmitterHoldingRegisterEmptyInterrupt = 0x01 << 1,
ReceivedDataAvailableInterrupt = 0x01 << 0
};
enum Baud {
Baud50 = 2304,
Baud110 = 1047,
Baud220 = 524,
Baud300 = 384,
Baud600 = 192,
Baud1200 = 96,
Baud2400 = 48,
Baud4800 = 24,
Baud9600 = 12,
Baud19200 = 6,
Baud38400 = 3,
Baud57600 = 2,
Baud115200 = 1
};
enum ParitySelect {
None = 0x00 << 3,
Odd = 0x01 << 3,
Even = 0x03 << 3,
Mark = 0x05 << 3,
Space = 0x07 << 3
};
enum StopBits {
One = 0x00 << 2,
Two = 0x01 << 2
};
enum WordLength {
FiveBits = 0x00,
SixBits = 0x01,
SevenBits = 0x02,
EightBits = 0x03
};
enum FIFOControl {
EnableFIFO = 0x01 << 0,
ClearReceiveFIFO = 0x01 << 1,
ClearTransmitFIFO = 0x01 << 2,
Enable64ByteFIFO = 0x01 << 5,
TriggerLevel1 = 0x00 << 6,
TriggerLevel2 = 0x01 << 6,
TriggerLevel3 = 0x02 << 6,
TriggerLevel4 = 0x03 << 6
};
enum ModemControl {
AutoflowControlEnabled = 0x01 << 5,
LoopbackMode = 0x01 << 4,
AuxiliaryOutput2 = 0x01 << 3,
AuxiliaryOutput1 = 0x01 << 2,
RequestToSend = 0x01 << 1,
DataTerminalReady = 0x01 << 0
};
enum LineStatus {
ErrorInReceivedFIFO = 0x01 << 7,
EmptyDataHoldingRegisters = 0x01 << 6,
EmptyTransmitterHoldingRegister = 0x01 << 5,
BreakInterrupt = 0x01 << 4,
FramingError = 0x01 << 3,
ParityError = 0x01 << 2,
OverrunError = 0x01 << 1,
DataReady = 0x01 << 0
};
private:
// ^CharacterDevice
virtual const char* class_name() const override { return "SerialDevice"; }
void initialize();
void set_interrupts(char interrupt_enable);
void set_baud(Baud);
void set_fifo_control(char fifo_control);
void set_line_control(ParitySelect, StopBits, WordLength);
void set_break_enable(bool break_enable);
void set_modem_control(char modem_control);
char get_line_status() const;
bool rx_ready();
bool tx_ready();
int m_base_addr;
char m_interrupt_enable;
char m_fifo_control;
Baud m_baud;
ParitySelect m_parity_select;
StopBits m_stop_bits;
WordLength m_word_length;
bool m_break_enable;
char m_modem_control;
};
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