inbvport.c File Reference

#include <ntoskrnl.h>
#include <cportlib/cportlib.h>
#include <cportlib/uartinfo.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 60 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 40 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 79 of file inbvport.c.

{
    /* Not yet supported */
    ASSERT(IsMMIODevice == FALSE);
 
    /* Set the default baud rate */
    if (BaudRate == 0)
        BaudRate = DEFAULT_BAUD_RATE;
 
    /* Check if the port or address is given */
    if (PortNumber)
    {
        /* Pick correct address for port */
        if (!PortAddress)
        {
            if (PortNumber < 1 || PortNumber > MAX_COM_PORTS)
                PortNumber = MAX_COM_PORTS;
            PortAddress = UlongToPtr(BaseArray[PortNumber]);
        }
    }
    else
    {
        /* Pick correct port for address */
#if defined(SARCH_PC98)
        static const ULONG TestPorts[] = {1, 2};
#else
        static const ULONG TestPorts[] = {2, 1};
#endif
        PortAddress = UlongToPtr(BaseArray[TestPorts[0]]);
        if (CpDoesPortExist(PortAddress))
        {
            PortNumber = TestPorts[0];
        }
        else
        {
            PortAddress = UlongToPtr(BaseArray[TestPorts[1]]);
            if (!CpDoesPortExist(PortAddress))
                return FALSE;
            PortNumber = TestPorts[1];
        }
    }
 
    /* Initialize the port unless it's already up and 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 29 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 50 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 70 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 17 of file inbvport.c.

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