inbvport.c File Reference

#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for inbvport.c:

Go to the source code of this file.

Functions
BOOLEAN NTAPI	InbvPortPollOnly (IN ULONG PortId)
BOOLEAN NTAPI	InbvPortGetByte (IN ULONG PortId, OUT PUCHAR Byte)
VOID NTAPI	InbvPortPutByte (IN ULONG PortId, IN UCHAR Byte)
VOID NTAPI	InbvPortEnableFifo (IN ULONG PortId, IN BOOLEAN Enable)
VOID NTAPI	InbvPortTerminate (IN ULONG PortId)
BOOLEAN NTAPI	InbvPortInitialize (IN ULONG BaudRate, IN ULONG PortNumber, IN PUCHAR PortAddress, OUT PULONG PortId, IN BOOLEAN IsMMIODevice)

Variables
CPPORT	Port [4]

Function Documentation

InbvPortEnableFifo()

VOID NTAPI InbvPortEnableFifo	(	IN ULONG	PortId,
		IN BOOLEAN	Enable
	)

Definition at line 56 of file inbvport.c.

{
    /* Set FIFO as requested */
    CpEnableFifo(Port[PortId].Address, Enable);
}

Referenced by HdlspEnableTerminal().

InbvPortGetByte()

BOOLEAN NTAPI InbvPortGetByte	(	IN ULONG	PortId,
		OUT PUCHAR	Byte
	)

Definition at line 38 of file inbvport.c.

{
    /* Read a byte from the port */
    return CpGetByte(&Port[PortId], Byte, TRUE, FALSE) == CP_GET_SUCCESS;
}

Referenced by HdlspDispatch().

InbvPortInitialize()

BOOLEAN NTAPI InbvPortInitialize	(	IN ULONG	BaudRate,
		IN ULONG	PortNumber,
		IN PUCHAR	PortAddress,
		OUT PULONG	PortId,
		IN BOOLEAN	IsMMIODevice
	)

Definition at line 73 of file inbvport.c.

{
    /* Not yet supported */
    ASSERT(IsMMIODevice == FALSE);
 
#if defined(SARCH_PC98)
    /* Set default baud rate */
    if (BaudRate == 0) BaudRate = 9600;
 
    /* Check if port or address given */
    if (PortNumber)
    {
        /* Pick correct address for port */
        if (!PortAddress)
        {
            if (PortNumber == 1)
            {
                PortAddress = (PUCHAR)0x30;
            }
            else
            {
                PortAddress = (PUCHAR)0x238;
                PortNumber = 2;
            }
        }
    }
    else
    {
        /* Pick correct port for address */
        PortAddress = (PUCHAR)0x30;
        if (CpDoesPortExist(PortAddress))
        {
            PortNumber = 1;
        }
        else
        {
            PortAddress = (PUCHAR)0x238;
            if (!CpDoesPortExist(PortAddress))
                return FALSE;
 
            PortNumber = 2;
        }
    }
#else
    /* Set default baud rate */
    if (BaudRate == 0) BaudRate = 19200;
 
    /* Check if port or address given */
    if (PortNumber)
    {
        /* Pick correct address for port */
        if (!PortAddress)
        {
            switch (PortNumber)
            {
                case 1:
                    PortAddress = (PUCHAR)0x3F8;
                    break;
 
                case 2:
                    PortAddress = (PUCHAR)0x2F8;
                    break;
 
                case 3:
                    PortAddress = (PUCHAR)0x3E8;
                    break;
 
                default:
                    PortNumber = 4;
                    PortAddress = (PUCHAR)0x2E8;
            }
        }
    }
    else
    {
        /* Pick correct port for address */
        PortAddress = (PUCHAR)0x2F8;
        if (CpDoesPortExist(PortAddress))
        {
            PortNumber = 2;
        }
        else
        {
            PortAddress = (PUCHAR)0x3F8;
            if (!CpDoesPortExist(PortAddress)) return FALSE;
            PortNumber = 1;
        }
    }
#endif
 
    /* Initialize the port unless it's already up, and then return it */
    if (Port[PortNumber - 1].Address) return FALSE;
 
    CpInitialize(&Port[PortNumber - 1], PortAddress, BaudRate);
    *PortId = PortNumber - 1;
 
    return TRUE;
}

Referenced by HdlspEnableTerminal().

InbvPortPollOnly()

BOOLEAN NTAPI InbvPortPollOnly

(

IN ULONG

PortId

)

Definition at line 28 of file inbvport.c.

{
    UCHAR Dummy;
 
    /* Poll a byte from the port */
    return CpGetByte(&Port[PortId], &Dummy, FALSE, TRUE) == CP_GET_SUCCESS;
}

Referenced by HdlspDispatch().

InbvPortPutByte()

VOID NTAPI InbvPortPutByte	(	IN ULONG	PortId,
		IN UCHAR	Byte
	)

Definition at line 47 of file inbvport.c.

{
    /* Send the byte */
    CpPutByte(&Port[PortId], Byte);
}

Referenced by HdlspPutData(), and HdlspSendStringAtBaud().

InbvPortTerminate()

VOID NTAPI InbvPortTerminate

(

IN ULONG

PortId

)

Definition at line 65 of file inbvport.c.

{
    /* The port is now available */
    Port[PortId].Address = NULL;
}

Referenced by HdlspEnableTerminal().

Variable Documentation

Port

CPPORT Port[4]

Initial value:

=
{
    {NULL, 0, TRUE},
    {NULL, 0, TRUE},
    {NULL, 0, TRUE},
    {NULL, 0, TRUE}
}

Definition at line 16 of file inbvport.c.

Referenced by InbvPortEnableFifo(), InbvPortGetByte(), InbvPortInitialize(), InbvPortPollOnly(), InbvPortPutByte(), and InbvPortTerminate().