cport_pc98.c File Reference

#include <intrin.h>
#include <ioaccess.h>
#include <ntstatus.h>
#include <cportlib/cportlib.h>
#include <drivers/pc98/serial.h>
#include <drivers/pc98/sysport.h>
#include <drivers/pc98/pit.h>
#include <drivers/pc98/cpu.h>
#include <debug.h>

Include dependency graph for cport_pc98.c:

Go to the source code of this file.

Macros
#define	NDEBUG
#define	TIMEOUT_COUNT   1024 * 200

Functions
static BOOLEAN	CpIsNekoProject (VOID)
static VOID	CpWait (VOID)
VOID NTAPI	CpEnableFifo (IN PUCHAR Address, IN BOOLEAN Enable)
VOID NTAPI	CpSetBaud (IN PCPPORT Port, IN ULONG BaudRate)
NTSTATUS NTAPI	CpInitialize (IN PCPPORT Port, IN PUCHAR Address, IN ULONG BaudRate)
static BOOLEAN	ComPortTest1 (IN PUCHAR Address)
static BOOLEAN	ComPortTest2 (IN PUCHAR Address)
BOOLEAN NTAPI	CpDoesPortExist (IN PUCHAR Address)
UCHAR NTAPI	CpReadLsr (IN PCPPORT Port, IN UCHAR ExpectedValue)
USHORT NTAPI	CpGetByte (IN PCPPORT Port, OUT PUCHAR Byte, IN BOOLEAN Wait, IN BOOLEAN Poll)
VOID NTAPI	CpPutByte (IN PCPPORT Port, IN UCHAR Byte)

Variables
struct {
PUCHAR   Address
BOOLEAN   HasFifo
BOOLEAN   FifoEnabled
UCHAR   RingIndicator
}	Rs232ComPort []
static BOOLEAN	IsNekoProject = FALSE

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 22 of file cport_pc98.c.

TIMEOUT_COUNT

#define TIMEOUT_COUNT   1024 * 200

Definition at line 27 of file cport_pc98.c.

Function Documentation

ComPortTest1()

static BOOLEAN ComPortTest1 ( IN PUCHAR  Address )

static

Definition at line 265 of file cport_pc98.c.

{
    /*
     * See "Building Hardware and Firmware to Complement Microsoft Windows Headless Operation"
     * Out-of-Band Management Port Device Requirements:
     * The device must act as a 16550 or 16450 UART.
     * Windows Server 2003 will test this device using the following process:
     *     1. Save off the current modem status register.
     *     2. Place the UART into diagnostic mode (The UART is placed into loopback mode
     *        by writing SERIAL_MCR_LOOP to the modem control register).
     *     3. The modem status register is read and the high bits are checked. This means
     *        SERIAL_MSR_CTS, SERIAL_MSR_DSR, SERIAL_MSR_RI and SERIAL_MSR_DCD should
     *        all be clear.
     *     4. Place the UART in diagnostic mode and turn on OUTPUT (Loopback Mode and
     *         OUTPUT are both turned on by writing (SERIAL_MCR_LOOP | SERIAL_MCR_OUT1)
     *         to the modem control register).
     *     5. The modem status register is read and the ring indicator is checked.
     *        This means SERIAL_MSR_RI should be set.
     *     6. Restore original modem status register.
     *
     * REMARK: Strangely enough, the Virtual PC 2007 virtual machine
     *         doesn't pass this test.
     */

    BOOLEAN RetVal = FALSE;
    UCHAR Mcr, Msr;

    /* Save the Modem Control Register */
    Mcr = READ_PORT_UCHAR((PUCHAR)SER2_IO_i_MODEM_CONTROL);

    /* Enable loop (diagnostic) mode (set Bit 4 of the MCR) */
    WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_MODEM_CONTROL, SER2_MCR_LOOPBACK);

    /* Clear all modem output bits */
    WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_MODEM_CONTROL, SER2_MCR_LOOPBACK);

    /* Read the Modem Status Register */
    Msr = READ_PORT_UCHAR((PUCHAR)SER2_IO_i_MODEM_STATUS);

    /*
     * The upper nibble of the MSR (modem output bits) must be
     * equal to the lower nibble of the MCR (modem input bits).
     */
    if ((Msr & (SER_MSR_CTS | SER_MSR_DSR | SER_MSR_RI | SER_MSR_DCD)) == 0x00)
    {
        /* Set all modem output bits */
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_MODEM_CONTROL,
                         SER2_MCR_OUT_1 | SER2_MCR_LOOPBACK); // Windows
/* ReactOS
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_MODEM_CONTROL,
                         SER2_MCR_DTR_STATE | SER2_MCR_RTS_STATE |
                         SER2_MCR_OUT_1 | SER2_MCR_OUT_2 | SER2_MCR_LOOPBACK);
*/

        /* Read the Modem Status Register */
        Msr = READ_PORT_UCHAR((PUCHAR)SER2_IO_i_MODEM_STATUS);

        /*
         * The upper nibble of the MSR (modem output bits) must be
         * equal to the lower nibble of the MCR (modem input bits).
         */
        if (Msr & SER_MSR_RI) // Windows
        // if (Msr & (SER_MSR_CTS | SER_MSR_DSR | SER_MSR_RI | SER_MSR_DCD) == 0xF0) // ReactOS
        {
            RetVal = TRUE;
        }
    }

    /* Restore the MCR */
    WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_MODEM_CONTROL, Mcr);

    return RetVal;
}

Referenced by CpDoesPortExist().

ComPortTest2()

static BOOLEAN ComPortTest2 ( IN PUCHAR  Address )

static

Definition at line 340 of file cport_pc98.c.

{
    /*
     * This test checks whether the 16450/16550 scratch register is available.
     * If not, the serial port is considered as unexisting.
     */

    UCHAR Byte = 0;

    do
    {
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_SCRATCH, Byte);

        if (READ_PORT_UCHAR((PUCHAR)SER2_IO_i_SCRATCH) != Byte)
            return FALSE;

    }
    while (++Byte != 0);

    return TRUE;
}

Referenced by CpDoesPortExist().

CpDoesPortExist()

BOOLEAN NTAPI CpDoesPortExist

(

IN PUCHAR

Address

)

Definition at line 364 of file cport_pc98.c.

{
    UCHAR Data, Status;

    if (Address == Rs232ComPort[0].Address || Address == (PUCHAR)0x41)
    {
        Data = READ_PORT_UCHAR(Address);
        Status = READ_PORT_UCHAR(Address + 2);
        if ((Data & Status) == 0xFF || (Data | Status) == 0x00)
            return FALSE;
        else
            return TRUE;
    }
    else if (Address == Rs232ComPort[1].Address)
    {
        return (ComPortTest1(Address) || ComPortTest2(Address));
    }

    return FALSE;
}

Referenced by CpInitialize(), DetectKeyboardController(), DetectSerialPorts(), InbvPortInitialize(), KdDebuggerInitialize0(), KdPortInitializeEx(), and WinLdrPortInitialize().

CpEnableFifo()

VOID NTAPI CpEnableFifo	(	IN PUCHAR	Address,
		IN BOOLEAN	Enable
	)

Definition at line 72 of file cport_pc98.c.

{
    /* Set FIFO and clear the receive/transmit buffers */
    if (Address == Rs232ComPort[0].Address && Rs232ComPort[0].HasFifo)
    {
        if (Enable)
            WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_FIFO_CONTROL,
                             SER_FCR_ENABLE | SER_FCR_RCVR_RESET | SER_FCR_TXMT_RESET);
        else
            WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_FIFO_CONTROL, SER_FCR_DISABLE);
        Rs232ComPort[0].FifoEnabled = Enable;
    }
    else if (Address == Rs232ComPort[1].Address && Rs232ComPort[1].HasFifo)
    {
        if (Enable)
            WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_FIFO_CONTROL,
                             SER_FCR_ENABLE | SER_FCR_RCVR_RESET | SER_FCR_TXMT_RESET);
        else
            WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_FIFO_CONTROL, SER_FCR_DISABLE);
        Rs232ComPort[1].FifoEnabled = Enable;
    }
    CpWait();
}

Referenced by CpGetByte(), CpInitialize(), InbvPortEnableFifo(), and WinLdrEnableFifo().

CpGetByte()

USHORT NTAPI CpGetByte	(	IN PCPPORT	Port,
		OUT PUCHAR	Byte,
		IN BOOLEAN	Wait,
		IN BOOLEAN	Poll
	)

Definition at line 448 of file cport_pc98.c.

{
    UCHAR Lsr;
    ULONG LimitCount = Wait ? TIMEOUT_COUNT : 1;
    UCHAR SuccessFlags, ErrorFlags;
    BOOLEAN FifoEnabled;

    /* Handle early read-before-init */
    if (!Port->Address)
        return CP_GET_NODATA;

    if (Port->Address == Rs232ComPort[0].Address)
    {
        SuccessFlags = Rs232ComPort[0].HasFifo ? SER1_LSR_RxRDY : SER1_STATUS_RxRDY;
        ErrorFlags = Rs232ComPort[0].HasFifo ? (SER1_LSR_PE | SER1_LSR_OE) :
                                               (SER1_STATUS_FE | SER1_STATUS_PE | SER1_STATUS_OE);

        /* If "wait" mode enabled, spin many times, otherwise attempt just once */
        while (LimitCount--)
        {
            /* Read LSR for data ready */
            Lsr = CpReadLsr(Port, SuccessFlags);
            if (Lsr & SuccessFlags)
            {
                /* If an error happened, clear the byte and fail */
                if (Lsr & ErrorFlags)
                {
                    /* Save the last FIFO state */
                    FifoEnabled = Rs232ComPort[0].FifoEnabled;

                    /* Turn off FIFO */
                    if (FifoEnabled)
                        CpEnableFifo(Port->Address, FALSE);

                    /* Clear error flag */
                    WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_MODE_COMMAND,
                                     SER1_COMMMAND_TxEN | SER1_COMMMAND_DTR |
                                     SER1_COMMMAND_RxEN | SER1_COMMMAND_ER | SER1_COMMMAND_RTS);

                    /* Turn on FIFO */
                    if (FifoEnabled)
                        CpEnableFifo(Port->Address, TRUE);

                    *Byte = 0;
                    return CP_GET_ERROR;
                }

                /* If only polling was requested by caller, return now */
                if (Poll)
                    return CP_GET_SUCCESS;

                /* Otherwise read the byte and return it */
                if (Rs232ComPort[0].HasFifo)
                    *Byte = READ_PORT_UCHAR((PUCHAR)SER1_IO_i_RECEIVER_BUFFER);
                else
                    *Byte = READ_PORT_UCHAR((PUCHAR)SER1_IO_i_DATA);

                /* TODO: Handle CD if port is in modem control mode */

                /* Byte was read */
                return CP_GET_SUCCESS;
            }
            else if (IsNekoProject && Rs232ComPort[0].HasFifo)
            {
                /*
                 * Neko Project 21/W doesn't set RxRDY without reading any data from 0x136.
                 * TODO: Check real hardware behavior.
                 */
                (VOID)READ_PORT_UCHAR((PUCHAR)SER1_IO_i_INTERRUPT_ID);
            }
        }

        /* Reset LSR, no data was found */
        CpReadLsr(Port, 0);
    }
    else if (Port->Address == Rs232ComPort[1].Address)
    {
        /* If "wait" mode enabled, spin many times, otherwise attempt just once */
        while (LimitCount--)
        {
            /* Read LSR for data ready */
            Lsr = CpReadLsr(Port, SER2_LSR_DR);
            if ((Lsr & SER2_LSR_DR) == SER2_LSR_DR)
            {
                /* If an error happened, clear the byte and fail */
                if (Lsr & (SER2_LSR_FE | SER2_LSR_PE | SER2_LSR_OE))
                {
                    *Byte = 0;
                    return CP_GET_ERROR;
                }

                /* If only polling was requested by caller, return now */
                if (Poll)
                    return CP_GET_SUCCESS;

                /* Otherwise read the byte and return it */
                *Byte = READ_PORT_UCHAR((UCHAR)SER2_IO_i_RECEIVER_BUFFER);

                /* TODO: Handle CD if port is in modem control mode */

                /* Byte was read */
                return CP_GET_SUCCESS;
            }
        }

        /* Reset LSR, no data was found */
        CpReadLsr(Port, 0);
    }

    return CP_GET_NODATA;
}

Referenced by InbvPortGetByte(), InbvPortPollOnly(), KdPortGetByteEx(), KdpPollByte(), KdpReceiveByte(), WinLdrPortGetByte(), and WinLdrPortPollOnly().

CpInitialize()

NTSTATUS NTAPI CpInitialize	(	IN PCPPORT	Port,
		IN PUCHAR	Address,
		IN ULONG	BaudRate
	)

Definition at line 153 of file cport_pc98.c.

{
    SYSTEM_CONTROL_PORT_C_REGISTER SystemControl;
    UCHAR FifoStatus;

    if (Port == NULL || Address == NULL || BaudRate == 0)
        return STATUS_INVALID_PARAMETER;

    if (!CpDoesPortExist(Address))
        return STATUS_NOT_FOUND;

    /* Initialize port data */
    Port->Address = Address;
    Port->BaudRate = 0;
    Port->Flags = 0;

    IsNekoProject = CpIsNekoProject();

    if (Port->Address == Rs232ComPort[0].Address)
    {
        /* FIFO test */
        FifoStatus = READ_PORT_UCHAR((PUCHAR)SER1_IO_i_INTERRUPT_ID) & SER1_IIR_FIFOS_ENABLED;
        CpWait();
        Rs232ComPort[0].HasFifo = ((READ_PORT_UCHAR((PUCHAR)SER1_IO_i_INTERRUPT_ID) & SER1_IIR_FIFOS_ENABLED) != FifoStatus);

        /* Disable the interrupts */
        SystemControl.Bits = READ_PORT_UCHAR((PUCHAR)PPI_IO_i_PORT_C);
        SystemControl.InterruptEnableRxReady = FALSE;
        SystemControl.InterruptEnableTxEmpty = FALSE;
        SystemControl.InterruptEnableTxReady = FALSE;
        WRITE_PORT_UCHAR((PUCHAR)PPI_IO_o_PORT_C, SystemControl.Bits);

        /* Turn off FIFO */
        if (Rs232ComPort[0].HasFifo)
            CpEnableFifo(Address, FALSE);

        /* Set the baud rate */
        CpSetBaud(Port, BaudRate);

        /* Software reset */
        WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_MODE_COMMAND, 0);
        CpWait();
        WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_MODE_COMMAND, 0);
        CpWait();
        WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_MODE_COMMAND, 0);
        CpWait();
        WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_MODE_COMMAND, SER1_COMMMAND_IR);
        CpWait();

        /* Mode instruction - asynchronous mode, 8 data bits, 1 stop bit, no parity, 16x clock divisor */
        WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_MODE_COMMAND,
                         SER1_MODE_LENGTH_8 | SER1_MODE_1_STOP | SER1_MODE_CLOCKx16);
        CpWait();

        /* Command instruction - transmit enable, turn on DTR and RTS, receive enable, clear error flag */
        WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_MODE_COMMAND,
                         SER1_COMMMAND_TxEN | SER1_COMMMAND_DTR |
                         SER1_COMMMAND_RxEN | SER1_COMMMAND_ER | SER1_COMMMAND_RTS);
        CpWait();

        /* Disable the interrupts again */
        WRITE_PORT_UCHAR((PUCHAR)PPI_IO_o_PORT_C, SystemControl.Bits);

        /* Turn on FIFO */
        if (Rs232ComPort[0].HasFifo)
            CpEnableFifo(Address, TRUE);

        /* Read junk out of the data register */
        if (Rs232ComPort[0].HasFifo)
            (VOID)READ_PORT_UCHAR((PUCHAR)SER1_IO_i_RECEIVER_BUFFER);
        else
            (VOID)READ_PORT_UCHAR((PUCHAR)SER1_IO_i_DATA);

        return STATUS_SUCCESS;
    }
    else if (Port->Address == Rs232ComPort[1].Address)
    {
        /* Disable the interrupts */
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_LINE_CONTROL, 0);
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_INTERRUPT_EN, 0);

        /* Turn on DTR, RTS and OUT2 */
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_MODEM_CONTROL,
                         SER2_MCR_DTR_STATE | SER2_MCR_RTS_STATE | SER2_MCR_OUT_2);

        /* Set the baud rate */
        CpSetBaud(Port, BaudRate);

        /* Set 8 data bits, 1 stop bit, no parity, no break */
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_LINE_CONTROL,
                         SER2_LCR_LENGTH_8 | SER2_LCR_ST1 | SER2_LCR_NO_PARITY);

        /* FIFO test */
        Rs232ComPort[1].HasFifo = READ_PORT_UCHAR((PUCHAR)SER2_IO_i_INTERRUPT_ID) & SER2_IIR_HAS_FIFO;

        /* Turn on FIFO */
        if (Rs232ComPort[1].HasFifo)
            CpEnableFifo(Address, TRUE);

        /* Read junk out of the RBR */
        (VOID)READ_PORT_UCHAR((PUCHAR)SER2_IO_i_RECEIVER_BUFFER);

        return STATUS_SUCCESS;
    }

    return STATUS_NOT_FOUND;
}

Referenced by InbvPortInitialize(), KdDebuggerInitialize0(), KdPortInitializeEx(), KdpPortInitialize(), LlbHwOmap3UartInitialize(), and WinLdrPortInitialize().

CpIsNekoProject()

static BOOLEAN CpIsNekoProject ( VOID  )

static

Definition at line 46 of file cport_pc98.c.

{
    UCHAR Input[4] = "NP2";
    UCHAR Output[4] = {0};
    UCHAR i;

    for (i = 0; i < 3; i++)
        WRITE_PORT_UCHAR((PUCHAR)0x7EF, Input[i]);

    for (i = 0; i < 3; i++)
        Output[i] = READ_PORT_UCHAR((PUCHAR)0x7EF);

    return (*(PULONG)Input == *(PULONG)Output);
}

Referenced by CpInitialize().

CpPutByte()

VOID NTAPI CpPutByte	(	IN PCPPORT	Port,
		IN UCHAR	Byte
	)

Definition at line 566 of file cport_pc98.c.

{
    if (Port->Address == Rs232ComPort[0].Address)
    {
        /* TODO: Check if port is in modem control to handle CD */

        if (Rs232ComPort[0].HasFifo)
        {
            while ((CpReadLsr(Port, SER1_LSR_TxRDY) & SER1_LSR_TxRDY) == 0)
                NOTHING;

            WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_TRANSMITTER_BUFFER, Byte);
        }
        else
        {
            while ((CpReadLsr(Port, SER1_STATUS_TxRDY) & SER1_STATUS_TxRDY) == 0)
                NOTHING;

            WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_DATA, Byte);
        }
    }
    else if (Port->Address == Rs232ComPort[1].Address)
    {
        /* TODO: Check if port is in modem control to handle CD */

        while ((CpReadLsr(Port, SER2_LSR_THR_EMPTY) & SER2_LSR_THR_EMPTY) == 0)
            NOTHING;

        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_TRANSMITTER_BUFFER, Byte);
    }
}

Referenced by InbvPortPutByte(), KdPortPutByteEx(), KdpSendByte(), LlbHwUartSendChar(), and WinLdrPortPutByte().

CpReadLsr()

UCHAR NTAPI CpReadLsr	(	IN PCPPORT	Port,
		IN UCHAR	ExpectedValue
	)

Definition at line 387 of file cport_pc98.c.

{
    UCHAR Lsr, Msr;
    SYSTEM_CONTROL_PORT_B_REGISTER SystemControl;

    if (Port->Address == Rs232ComPort[0].Address)
    {
        /* Read the LSR and check if the expected value is present */
        if (Rs232ComPort[0].HasFifo)
        {
            Lsr = READ_PORT_UCHAR((PUCHAR)SER1_IO_i_LINE_STATUS);
            if (!(Lsr & ExpectedValue))
            {
                Msr = READ_PORT_UCHAR((PUCHAR)SER1_IO_i_MODEM_STATUS);

                /* If the ring indicator reaches 3, we've seen this on/off twice */
                Rs232ComPort[0].RingIndicator |= (Msr & SER_MSR_RI) ? 1 : 2;
                if (Rs232ComPort[0].RingIndicator == 3)
                    Port->Flags |= CPPORT_FLAG_MODEM_CONTROL;
            }
        }
        else
        {
            Lsr = READ_PORT_UCHAR((PUCHAR)SER1_IO_i_STATUS);
            if (!(Lsr & ExpectedValue))
            {
                SystemControl.Bits = READ_PORT_UCHAR((PUCHAR)PPI_IO_i_PORT_B);

                /* If the ring indicator reaches 3, we've seen this on/off twice */
                Rs232ComPort[0].RingIndicator |= SystemControl.RingIndicator ? 1 : 2;
                if (Rs232ComPort[0].RingIndicator == 3)
                    Port->Flags |= CPPORT_FLAG_MODEM_CONTROL;
            }
        }

        return Lsr;
    }
    else if (Port->Address == Rs232ComPort[1].Address)
    {
        /* Read the LSR and check if the expected value is present */
        Lsr = READ_PORT_UCHAR((PUCHAR)SER2_IO_i_LINE_STATUS);
        if (!(Lsr & ExpectedValue))
        {
            Msr = READ_PORT_UCHAR((PUCHAR)SER2_IO_i_MODEM_STATUS);

            /* If the indicator reaches 3, we've seen this on/off twice */
            Rs232ComPort[1].RingIndicator |= (Msr & SER_MSR_RI) ? 1 : 2;
            if (Rs232ComPort[1].RingIndicator == 3)
                Port->Flags |= CPPORT_FLAG_MODEM_CONTROL;
        }

        return Lsr;
    }

    return 0;
}

Referenced by CpGetByte(), and CpPutByte().

CpSetBaud()

VOID NTAPI CpSetBaud	(	IN PCPPORT	Port,
		IN ULONG	BaudRate
	)

Definition at line 100 of file cport_pc98.c.

{
    UCHAR Lcr;
    USHORT Count;
    TIMER_CONTROL_PORT_REGISTER TimerControl;

    if (Port->Address == Rs232ComPort[0].Address)
    {
        if (Rs232ComPort[0].HasFifo)
            WRITE_PORT_UCHAR((PUCHAR)SER1_IO_o_DIVISOR_LATCH, SER1_DLR_MODE_LEGACY);

        TimerControl.BcdMode = FALSE;
        TimerControl.OperatingMode = PitOperatingMode3;
        TimerControl.AccessMode = PitAccessModeLowHigh;
        TimerControl.Channel = PitChannel2;
        if (IsNekoProject)
        {
            /* The horrible text input lag happens by about 6 seconds on my PC */
            Count = 3;
        }
        else
        {
            Count = (READ_PORT_UCHAR((PUCHAR)0x42) & 0x20) ?
                    (TIMER_FREQUENCY_1 / (BaudRate * 16)) : (TIMER_FREQUENCY_2 / (BaudRate * 16));
        }
        Write8253Timer(TimerControl, Count);

        /* Save baud rate in port */
        Port->BaudRate = BaudRate;
    }
    else if (Port->Address == Rs232ComPort[1].Address)
    {
        /* Set the DLAB on */
        Lcr = READ_PORT_UCHAR((PUCHAR)SER2_IO_i_LINE_CONTROL);
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_LINE_CONTROL, Lcr | SER2_LCR_DLAB);

        /* Set the baud rate */
        Count = SER2_CLOCK_RATE / BaudRate;
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_DIVISOR_LATCH_LSB, Count & 0xFF);
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_DIVISOR_LATCH_MSB, (Count >> 8) & 0xFF);

        /* Reset DLAB */
        WRITE_PORT_UCHAR((PUCHAR)SER2_IO_o_LINE_CONTROL, Lcr & ~SER2_LCR_DLAB);

        /* Save baud rate in port */
        Port->BaudRate = BaudRate;
    }
}

Referenced by CpInitialize().

CpWait()

static VOID CpWait ( VOID  )

static

Definition at line 62 of file cport_pc98.c.

{
    UCHAR i;

    for (i = 0; i < 6; i++)
        WRITE_PORT_UCHAR((PUCHAR)CPU_IO_o_ARTIC_DELAY, 0);
}

Referenced by CpEnableFifo(), and CpInitialize().

Variable Documentation

Address

PUCHAR Address

Definition at line 31 of file cport_pc98.c.

Referenced by CpDoesPortExist(), CpEnableFifo(), and CpInitialize().

FifoEnabled

BOOLEAN FifoEnabled

Definition at line 33 of file cport_pc98.c.

Referenced by CpGetByte(), and SerialDetectUartType().

HasFifo

BOOLEAN HasFifo

Definition at line 32 of file cport_pc98.c.

Referenced by CpEnableFifo(), CpGetByte(), CpInitialize(), CpPutByte(), CpReadLsr(), CpSetBaud(), and DetectSerialPorts().

IsNekoProject

BOOLEAN IsNekoProject = FALSE

static

Definition at line 41 of file cport_pc98.c.

Referenced by CpGetByte(), CpInitialize(), and CpSetBaud().

RingIndicator

UCHAR RingIndicator

Definition at line 34 of file cport_pc98.c.

Referenced by CpReadLsr().

Rs232ComPort

struct { ... } Rs232ComPort[]

Initial value:

=
{
    { (PUCHAR)0x030, FALSE, FALSE, 0 },
    { (PUCHAR)0x238, FALSE, FALSE, 0 }
}

Referenced by CpDoesPortExist(), CpEnableFifo(), CpGetByte(), CpInitialize(), CpPutByte(), CpReadLsr(), CpSetBaud(), and Rs232PortInUse().