Source code of Windows XP (NT5)
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
/*
************************************************************************ * * COMM.h * * * Portions Copyright (C) 1996-1998 National Semiconductor Corp. * All rights reserved. * Copyright (C) 1996-1998 Microsoft Corporation. All Rights Reserved. * * * ************************************************************************* */
#ifndef COMM_H
#define COMM_H
/*
* Size of the 16550 read and write FIFOs */ #define FIFO_SIZE 16
/*
* The programming interface to a UART (COM serial port) * consists of eight consecutive registers. * These are the port offsets from the UART's base I/O address. */ typedef enum comPortRegOffsets { XFER_REG_OFFSET = 0, INT_ENABLE_REG_OFFSET = 1, INT_ID_AND_FIFO_CNTRL_REG_OFFSET = 2, LINE_CONTROL_REG_OFFSET = 3, MODEM_CONTROL_REG_OFFSET = 4, LINE_STAT_REG_OFFSET = 5, MODEM_STAT_REG_OFFSET = 6, SCRATCH_REG_OFFSET = 7 } comPortRegOffset;
/*
* Bits in the UART Interrupt-Id register. */ #define INTID_INTERRUPT_NOT_PENDING (UCHAR)(1 << 0)
/*
* Values for bits 2-1 of Interrupt-Id register: * 00 Modem Stat reg interrupt * 01 Transmitter holding reg interrupt * 10 Receive data ready interrupt * 11 Receive line status interrupt * */ #define INTID_INTIDMASK (UCHAR)(3 << 1)
#define INTID_MODEMSTAT_INT (UCHAR)(0 << 1)
#define INTID_XMITREG_INT (UCHAR)(1 << 1)
#define INTID_RCVDATAREADY_INT (UCHAR)(2 << 1)
#define INTID_RCVLINESTAT_INT (UCHAR)(3 << 1)
/*
* Bits in the UART line-status register. */ #define LINESTAT_DATAREADY (UCHAR)(1 << 0)
#define LINESTAT_OVERRUNERROR (UCHAR)(1 << 1)
#define LINESTAT_PARITYERROR (UCHAR)(1 << 2)
#define LINESTAT_FRAMINGERROR (UCHAR)(1 << 3)
#define LINESTAT_BREAK (UCHAR)(1 << 4)
#define LINESTAT_XMIT_HOLDING_REG_EMPTY (UCHAR)(1 << 5)
#define LINESTAT_XMIT_SHIFT_AND_HOLDING_REG_EMPTY (UCHAR)(1 << 6)
/*
* These are bits in the UART's interrupt-enable register (INT_ENABLE_REG_OFFSET). */ #define DATA_AVAIL_INT_ENABLE (1 << 0)
#define READY_FOR_XMIT_INT_ENABLE (1 << 1)
#define RCV_LINE_STAT_INT_ENABLE (1 << 2)
#define MODEM_STAT_INT_ENABLE (1 << 3)
#define RCV_MODE_INTS_ENABLE (DATA_AVAIL_INT_ENABLE)
#define XMIT_MODE_INTS_ENABLE (READY_FOR_XMIT_INT_ENABLE|DATA_AVAIL_INT_ENABLE)
#define ALL_INTS_ENABLE (RCV_MODE_INTS_ENABLE | XMIT_MODE_INTS_ENABLE)
#define ALL_INTS_DISABLE 0
/*
* These are fine-tuning parameters for the COM port ISR. * Number of times we poll a COM port register waiting * for a value which may/must appear. */ #define REG_POLL_LOOPS 2
#define REG_TIMEOUT_LOOPS 1000000
typedef enum { STATE_INIT = 0, STATE_GOT_BOF, STATE_ACCEPTING, STATE_ESC_SEQUENCE, STATE_SAW_EOF, STATE_CLEANUP } portRcvState;
/*
* This is the information that we need to keep for each COMM port. */ typedef struct _comPortInfo {
/*
* HW resource settings for COM port. */
//
// Physical address of the ConfigIoBaseAddress
//
ULONG ConfigIoBasePhysAddr;
//
// Virtual address of the ConfigIoBaseAddress
//
PUCHAR ConfigIoBaseAddr;
//
// Physical address of the UartIoBaseAddress
//
ULONG ioBasePhys;
//
// Virtual address of the UartIoBaseAddress
//
PUCHAR ioBase;
//
// Interrupt number this adapter is using.
//
UINT irq;
//
// DMA Cnannel Number.
//
UCHAR DMAChannel;
/*
* Is this COM port a 16550 with a 16-byte FIFO or * a 16450/8250 with no FIFO ? */ BOOLEAN haveFIFO; /*
* Data for our rcv state machine. */ UCHAR rawBuf[FIFO_SIZE]; PUCHAR readBuf; PUCHAR dmaReadBuf; UINT readBufPos; portRcvState rcvState; //
// Debug counter for packets received correctly.
//
UINT PacketsReceived_DEBUG;
/*
* Data for send state machine */ PUCHAR writeBuf; UINT writeBufPos; UINT writeBufLen; UINT SirWritePending; UINT IsrDoneWithPacket;
/*
* Dongle or part-specific information */ dongleCapabilities hwCaps; UINT dongleContext;
} comPortInfo;
#endif COMM_H
|
