mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-12-26 02:21:49 +01:00
362 lines
9.0 KiB
C++
362 lines
9.0 KiB
C++
/*
|
|
* Copyright (C) 2002-2007 The DOSBox Team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/* $Id: serialport.h,v 1.16 2009/02/01 14:11:45 qbix79 Exp $ */
|
|
|
|
#ifndef DOSBOX_SERIALPORT_H
|
|
#define DOSBOX_SERIALPORT_H
|
|
|
|
#define SERIAL_DEBUG 0
|
|
|
|
// Uncomment this for a lot of debug messages:
|
|
//#define LOG_UART
|
|
|
|
#ifndef DOSBOX_DOSBOX_H
|
|
#include "dosbox.h"
|
|
#endif
|
|
#ifndef DOSBOX_INOUT_H
|
|
#include "inout.h"
|
|
#endif
|
|
#ifndef DOSBOX_TIMER_H
|
|
#include "timer.h"
|
|
#endif
|
|
#ifndef DOSBOX_DOS_INC_H
|
|
#include "dos_inc.h"
|
|
#endif
|
|
#ifndef DOSBOX_PROGRAMS_H
|
|
#include "programs.h"
|
|
#endif
|
|
|
|
#if SERIAL_DEBUG
|
|
#include "hardware.h"
|
|
#endif
|
|
|
|
// Serial port interface
|
|
|
|
class CSerial {
|
|
public:
|
|
|
|
#if SERIAL_DEBUG
|
|
FILE * debugfp;
|
|
bool dbg_modemcontrol; // RTS,CTS,DTR,DSR,RI,CD
|
|
bool dbg_serialtraffic;
|
|
bool dbg_register;
|
|
bool dbg_interrupt;
|
|
bool dbg_aux;
|
|
|
|
#endif
|
|
|
|
static bool getBituSubstring(const char* name,Bitu* data, CommandLine* cmd);
|
|
|
|
bool InstallationSuccessful;// check after constructing. If
|
|
// something was wrong, delete it right away.
|
|
|
|
// Constructor takes com port number (0-3)
|
|
CSerial(Bitu id, CommandLine* cmd);
|
|
|
|
virtual ~CSerial();
|
|
|
|
IO_ReadHandleObject ReadHandler[8];
|
|
IO_WriteHandleObject WriteHandler[8];
|
|
|
|
float bytetime; // how long a byte takes to transmit/receive in milliseconds
|
|
void changeLineProperties();
|
|
Bitu idnumber;
|
|
|
|
void setEvent(Bit16u type, float duration);
|
|
void removeEvent(Bit16u type);
|
|
void handleEvent(Bit16u type);
|
|
virtual void handleUpperEvent(Bit16u type)=0;
|
|
|
|
// defines for event type
|
|
#define SERIAL_TX_LOOPBACK_EVENT 0
|
|
#define SERIAL_THR_LOOPBACK_EVENT 1
|
|
#define SERIAL_ERRMSG_EVENT 2
|
|
|
|
#define SERIAL_TX_EVENT 3
|
|
#define SERIAL_RX_EVENT 4
|
|
#define SERIAL_POLLING_EVENT 5
|
|
#define SERIAL_THR_EVENT 6
|
|
|
|
#define SERIAL_BASE_EVENT_COUNT 6
|
|
|
|
#define COMNUMBER idnumber+1
|
|
|
|
Bitu irq;
|
|
|
|
// CSerial requests an update of the input lines
|
|
virtual void updateMSR()=0;
|
|
|
|
// Control lines from prepherial to serial port
|
|
bool getDTR();
|
|
bool getRTS();
|
|
|
|
bool getRI();
|
|
bool getCD();
|
|
bool getDSR();
|
|
bool getCTS();
|
|
|
|
void setRI(bool value);
|
|
void setDSR(bool value);
|
|
void setCD(bool value);
|
|
void setCTS(bool value);
|
|
|
|
// From serial port to prepherial
|
|
// set output lines
|
|
virtual void setRTSDTR(bool rts, bool dtr)=0;
|
|
virtual void setRTS(bool val)=0;
|
|
virtual void setDTR(bool val)=0;
|
|
|
|
// Register access
|
|
void Write_THR(Bit8u data);
|
|
void Write_IER(Bit8u data);
|
|
void Write_FCR(Bit8u data);
|
|
void Write_LCR(Bit8u data);
|
|
void Write_MCR(Bit8u data);
|
|
// Really old hardware seems to have the delta part of this register writable
|
|
void Write_MSR(Bit8u data);
|
|
void Write_SPR(Bit8u data);
|
|
void Write_reserved(Bit8u data, Bit8u address);
|
|
|
|
Bitu Read_RHR();
|
|
Bitu Read_IER();
|
|
Bitu Read_ISR();
|
|
Bitu Read_LCR();
|
|
Bitu Read_MCR();
|
|
Bitu Read_LSR();
|
|
Bitu Read_MSR();
|
|
Bitu Read_SPR();
|
|
|
|
// If a byte comes from loopback or prepherial, put it in here.
|
|
void receiveByte(Bit8u data);
|
|
|
|
// If an error was received, put it here (in LSR register format)
|
|
void receiveError(Bit8u errorword);
|
|
|
|
// depratched
|
|
// connected device checks, if port can receive data:
|
|
bool CanReceiveByte();
|
|
|
|
// when THR was shifted to TX
|
|
void ByteTransmitting();
|
|
|
|
// When done sending, notify here
|
|
void ByteTransmitted();
|
|
|
|
// Transmit byte to prepherial
|
|
virtual void transmitByte(Bit8u val, bool first)=0;
|
|
|
|
// switch break state to the passed value
|
|
virtual void setBreak(bool value)=0;
|
|
|
|
// change baudrate, number of bits, parity, word length al at once
|
|
virtual void updatePortConfig(Bit16u divider, Bit8u lcr)=0;
|
|
|
|
void Init_Registers();
|
|
|
|
bool Putchar(Bit8u data, bool wait_dtr, bool wait_rts, Bitu timeout);
|
|
bool Getchar(Bit8u* data, Bit8u* lsr, bool wait_dsr, Bitu timeout);
|
|
|
|
|
|
private:
|
|
|
|
DOS_Device* mydosdevice;
|
|
|
|
// I used this spec: http://www.exar.com/products/st16c450v420.pdf
|
|
|
|
void ComputeInterrupts();
|
|
|
|
// a sub-interrupt is triggered
|
|
void rise(Bit8u priority);
|
|
|
|
// clears the pending sub-interrupt
|
|
void clear(Bit8u priority);
|
|
|
|
#define ERROR_PRIORITY 4 // overrun, parity error, frame error, break
|
|
#define RX_PRIORITY 1 // a byte has been received
|
|
#define TX_PRIORITY 2 // tx buffer has become empty
|
|
#define MSR_PRIORITY 8 // CRS, DSR, RI, DCD change
|
|
#define NONE_PRIORITY 0
|
|
|
|
Bit8u waiting_interrupts; // these are on, but maybe not enabled
|
|
|
|
// 16C450 (no FIFO)
|
|
// read/write name
|
|
|
|
Bit16u baud_divider;
|
|
Bit8u RHR; // r Receive Holding Register, also LSB of Divisor Latch (r/w)
|
|
#define RHR_OFFSET 0
|
|
// Data: whole byte
|
|
|
|
Bit8u THR; // w Transmit Holding Register
|
|
#define THR_OFFSET 0
|
|
// Data: whole byte
|
|
|
|
Bit8u IER; // r/w Interrupt Enable Register, also MSB of Divisor Latch
|
|
#define IER_OFFSET 1
|
|
|
|
bool irq_active;
|
|
|
|
#define RHR_INT_Enable_MASK 0x1
|
|
#define THR_INT_Enable_MASK 0x2
|
|
#define Receive_Line_INT_Enable_MASK 0x4
|
|
#define Modem_Status_INT_Enable_MASK 0x8
|
|
|
|
Bit8u ISR; // r Interrupt Status Register
|
|
#define ISR_OFFSET 2
|
|
|
|
#define ISR_CLEAR_VAL 0x1
|
|
#define ISR_ERROR_VAL 0x6
|
|
#define ISR_RX_VAL 0x4
|
|
#define ISR_TX_VAL 0x2
|
|
#define ISR_MSR_VAL 0x0
|
|
public:
|
|
Bit8u LCR; // r/w Line Control Register
|
|
private:
|
|
#define LCR_OFFSET 3
|
|
// bit0: word length bit0
|
|
// bit1: word length bit1
|
|
// bit2: stop bits
|
|
// bit3: parity enable
|
|
// bit4: even parity
|
|
// bit5: set parity
|
|
// bit6: set break
|
|
// bit7: divisor latch enable
|
|
|
|
|
|
#define LCR_BREAK_MASK 0x40
|
|
#define LCR_DIVISOR_Enable_MASK 0x80
|
|
#define LCR_PORTCONFIG_MASK 0x3F
|
|
|
|
#define LCR_PARITY_NONE 0x0
|
|
#define LCR_PARITY_ODD 0x8
|
|
#define LCR_PARITY_EVEN 0x18
|
|
#define LCR_PARITY_MARK 0x28
|
|
#define LCR_PARITY_SPACE 0x38
|
|
|
|
#define LCR_DATABITS_5 0x0
|
|
#define LCR_DATABITS_6 0x1
|
|
#define LCR_DATABITS_7 0x2
|
|
#define LCR_DATABITS_8 0x3
|
|
|
|
#define LCR_STOPBITS_1 0x0
|
|
#define LCR_STOPBITS_MORE_THAN_1 0x4
|
|
|
|
// Modem Control Register
|
|
// r/w
|
|
#define MCR_OFFSET 4
|
|
bool dtr; // bit0: DTR
|
|
bool rts; // bit1: RTS
|
|
bool op1; // bit2: OP1
|
|
bool op2; // bit3: OP2
|
|
bool loopback; // bit4: loop back enable
|
|
|
|
#define MCR_DTR_MASK 0x1
|
|
#define MCR_RTS_MASK 0x2
|
|
#define MCR_OP1_MASK 0x4
|
|
#define MCR_OP2_MASK 0x8
|
|
#define MCR_LOOPBACK_Enable_MASK 0x10
|
|
public:
|
|
Bit8u LSR; // r Line Status Register
|
|
private:
|
|
|
|
#define LSR_OFFSET 5
|
|
|
|
#define LSR_RX_DATA_READY_MASK 0x1
|
|
#define LSR_OVERRUN_ERROR_MASK 0x2
|
|
#define LSR_PARITY_ERROR_MASK 0x4
|
|
#define LSR_FRAMING_ERROR_MASK 0x8
|
|
#define LSR_RX_BREAK_MASK 0x10
|
|
#define LSR_TX_HOLDING_EMPTY_MASK 0x20
|
|
#define LSR_TX_EMPTY_MASK 0x40
|
|
|
|
#define LSR_ERROR_MASK 0x1e
|
|
|
|
// error printing
|
|
bool errormsg_pending;
|
|
Bitu framingErrors;
|
|
Bitu parityErrors;
|
|
Bitu overrunErrors;
|
|
Bitu overrunIF0;
|
|
Bitu breakErrors;
|
|
|
|
|
|
// Modem Status Register
|
|
// r
|
|
#define MSR_OFFSET 6
|
|
bool d_cts; // bit0: deltaCTS
|
|
bool d_dsr; // bit1: deltaDSR
|
|
bool d_ri; // bit2: deltaRI
|
|
bool d_cd; // bit3: deltaCD
|
|
bool cts; // bit4: CTS
|
|
bool dsr; // bit5: DSR
|
|
bool ri; // bit6: RI
|
|
bool cd; // bit7: CD
|
|
|
|
#define MSR_delta_MASK 0xf
|
|
#define MSR_LINE_MASK 0xf0
|
|
|
|
#define MSR_dCTS_MASK 0x1
|
|
#define MSR_dDSR_MASK 0x2
|
|
#define MSR_dRI_MASK 0x4
|
|
#define MSR_dCD_MASK 0x8
|
|
#define MSR_CTS_MASK 0x10
|
|
#define MSR_DSR_MASK 0x20
|
|
#define MSR_RI_MASK 0x40
|
|
#define MSR_CD_MASK 0x80
|
|
|
|
Bit8u SPR; // r/w Scratchpad Register
|
|
#define SPR_OFFSET 7
|
|
|
|
|
|
// For loopback purposes...
|
|
Bit8u loopback_data;
|
|
void transmitLoopbackByte(Bit8u val, bool value);
|
|
|
|
// 16C550 (FIFO)
|
|
// TODO
|
|
#define FCR_OFFSET 2
|
|
bool fifo_warn;
|
|
//Bit8u FCR; // FIFO Control Register
|
|
|
|
};
|
|
|
|
extern CSerial* serialports[];
|
|
const Bit8u serial_defaultirq[4] = { 4, 3, 4, 3 };
|
|
const Bit16u serial_baseaddr[4] = {0x3f8,0x2f8,0x3e8,0x2e8};
|
|
const char* const serial_comname[]={"COM1","COM2","COM3","COM4"};
|
|
|
|
// the COM devices
|
|
|
|
class device_COM : public DOS_Device {
|
|
public:
|
|
// Creates a COM device that communicates with the num-th parallel port, i.e. is LPTnum
|
|
device_COM(class CSerial* sc);
|
|
~device_COM();
|
|
bool Read(Bit8u * data,Bit16u * size);
|
|
bool Write(Bit8u * data,Bit16u * size);
|
|
bool Seek(Bit32u * pos,Bit32u type);
|
|
bool Close();
|
|
Bit16u GetInformation(void);
|
|
private:
|
|
CSerial* sclass;
|
|
};
|
|
|
|
#endif
|
|
|