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/*++ BUILD Version: 0001 // Increment this if a change has global effects
Copyright (c) 1991 Microsoft Corporation
Copyright (c) 1992, 1993 Digital Equipment Corporation
Module Name:
halpcsl.h
Abstract:
This header file includes the definitions for standard PC serial
port UARTs.
Stolen from jazzserp.h, which is a slightly different chip-
it has a 16 byte fifo - we are just double buffered.
Author:
David N. Cutler (davec) 28-Apr-1991
Miche Baker-Harvey (miche) 01-June-1992
Revision History:
--*/
#ifndef _HALPCSL_
#define _HALPCSL_
//
// Define base port numbers for serial lines inside the combo chip
//
#define COMA_PORT_BASE 0x3f8
#define COMB_PORT_BASE 0x2f8
//
// Define serial port read registers structure.
//
typedef struct _SP_READ_REGISTERS {
UCHAR ReceiveBuffer;
UCHAR InterruptEnable;
UCHAR InterruptId;
UCHAR LineControl;
UCHAR ModemControl;
UCHAR LineStatus;
UCHAR ModemStatus;
UCHAR ScratchPad;
} SP_READ_REGISTERS, *PSP_READ_REGISTERS;
//
// Define define serial port write registers structure.
//
typedef struct _SP_WRITE_REGISTERS {
UCHAR TransmitBuffer;
UCHAR InterruptEnable;
UCHAR FifoControl;
UCHAR LineControl;
UCHAR ModemControl;
UCHAR Reserved1;
UCHAR ModemStatus;
UCHAR ScratchPad;
} SP_WRITE_REGISTERS, *PSP_WRITE_REGISTERS;
//
// Define serial port interrupt enable register structure.
//
typedef struct _SP_INTERRUPT_ENABLE {
UCHAR ReceiveEnable : 1;
UCHAR TransmitEnable : 1;
UCHAR LineStatusEnable : 1;
UCHAR ModemStatusEnable : 1;
UCHAR Reserved1 : 4;
} SP_INTERRUPT_ENABLE, *PSP_INTERRUPT_ENABLE;
//
// Define serial port interrupt id register structure.
//
typedef struct _SP_INTERRUPT_ID {
UCHAR InterruptPending : 1;
UCHAR Identification : 3;
UCHAR Reserved1 : 2;
UCHAR FifoEnabled : 2; // always read as 0
} SP_INTERRUPT_ID, *PSP_INTERRUPT_ID;
//
// Define serial port fifo control register structure.
// This register is here for software compatibility, but there is
// no FIFO on the 16C452
//
typedef struct _SP_FIFO_CONTROL {
UCHAR FifoEnable : 1;
UCHAR ReceiveFifoReset : 1;
UCHAR TransmitFifoReset : 1;
UCHAR DmaModeSelect : 1;
UCHAR Reserved1 : 2;
UCHAR ReceiveFifoLevel : 2;
} SP_FIFO_CONTROL, *PSP_FIFO_CONTROL;
//
// Define serial port line control register structure.
//
typedef struct _SP_LINE_CONTROL {
UCHAR CharacterSize : 2;
UCHAR StopBits : 1;
UCHAR ParityEnable : 1;
UCHAR EvenParity : 1;
UCHAR StickParity : 1;
UCHAR SetBreak : 1;
UCHAR DivisorLatch : 1;
} SP_LINE_CONTROL, *PSP_LINE_CONTROL;
//
// Line status register character size definitions.
//
#define FIVE_BITS 0x0 // five bits per character
#define SIX_BITS 0x1 // six bits per character
#define SEVEN_BITS 0x2 // seven bits per character
#define EIGHT_BITS 0x3 // eight bits per character
//
// Line speed divisor definition. We get our baud rate clock
// from the 82C106.
//
#define BAUD_RATE_2400 48 // divisor for 2400 baud
#define BAUD_RATE_4800 24 // divisor for 4800 baud
#define BAUD_RATE_9600 12 // divisor for 9600 baud
#define BAUD_RATE_19200 6 // divisor for 19200 baud
#define BAUD_RATE_38400 3 // divisor for 38400 baud
#define BAUD_RATE_57600 2 // divisor for 57600 baud
#define BAUD_RATE_115200 1 // divisor for 115200 baud
//
// Define serial port modem control register structure.
//
typedef struct _SP_MODEM_CONTROL {
UCHAR DataTerminalReady : 1;
UCHAR RequestToSend : 1;
UCHAR Reserved1 : 1;
UCHAR Interrupt : 1;
UCHAR loopBack : 1;
UCHAR Reserved2 : 3;
} SP_MODEM_CONTROL, *PSP_MODEM_CONTROL;
//
// Define serial port line status register structure.
//
typedef struct _SP_LINE_STATUS {
UCHAR DataReady : 1;
UCHAR OverrunError : 1;
UCHAR ParityError : 1;
UCHAR FramingError : 1;
UCHAR BreakIndicator : 1;
UCHAR TransmitHoldingEmpty : 1;
UCHAR TransmitEmpty : 1;
UCHAR ReceiveFifoError : 1;
} SP_LINE_STATUS, *PSP_LINE_STATUS;
//
// Define serial port modem status register structure.
//
typedef struct _SP_MODEM_STATUS {
UCHAR DeltaClearToSend : 1;
UCHAR DeltaDataSetReady : 1;
UCHAR TrailingRingIndicator : 1;
UCHAR DeltaReceiveDetect : 1;
UCHAR ClearToSend : 1;
UCHAR DataSetReady : 1;
UCHAR RingIndicator : 1;
UCHAR ReceiveDetect : 1;
} SP_MODEM_STATUS, *PSP_MODEM_STATUS;
#endif // _HALPCSL_
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