mirror of
https://github.com/kanjitalk755/macemu.git
synced 2025-01-11 10:30:09 +00:00
316 lines
8.2 KiB
C++
316 lines
8.2 KiB
C++
/*
|
|
* serial.cpp - Serial device driver
|
|
*
|
|
* SheepShaver (C) 1997-2008 Marc Hellwig and Christian Bauer
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "sysdeps.h"
|
|
#include "main.h"
|
|
#include "macos_util.h"
|
|
#include "serial.h"
|
|
#include "serial_defs.h"
|
|
|
|
#define DEBUG 0
|
|
#include "debug.h"
|
|
|
|
|
|
// Global variables
|
|
SERDPort *the_serd_port[2];
|
|
|
|
// Function pointers from imported functions
|
|
typedef int16 (*iocic_ptr)(uint32, int16);
|
|
static uint32 iocic_tvect = 0;
|
|
static inline int16 IOCommandIsComplete(uint32 arg1, int16 arg2)
|
|
{
|
|
return (int16)CallMacOS2(iocic_ptr, iocic_tvect, arg1, arg2);
|
|
}
|
|
|
|
|
|
/*
|
|
* Empty function (AIn/BIn Open/Close)
|
|
*/
|
|
|
|
int16 SerialNothing(uint32 pb, uint32 dce)
|
|
{
|
|
return noErr;
|
|
}
|
|
|
|
|
|
/*
|
|
* Driver Open() routine (output side only)
|
|
*/
|
|
|
|
int16 SerialOpen(uint32 pb, uint32 dce)
|
|
{
|
|
D(bug("SerialOpen pb %08lx, dce %08lx\n", pb, dce));
|
|
|
|
// Get IOCommandIsComplete function
|
|
iocic_tvect = FindLibSymbol("\021DriverServicesLib", "\023IOCommandIsComplete");
|
|
D(bug("IOCommandIsComplete TVECT at %08lx\n", iocic_tvect));
|
|
if (iocic_tvect == 0) {
|
|
printf("FATAL: SerialOpen(): Can't find IOCommandIsComplete()\n");
|
|
return openErr;
|
|
}
|
|
|
|
// Do nothing if port is already open
|
|
SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
|
|
if (the_port->is_open)
|
|
return noErr;
|
|
|
|
// Init variables
|
|
the_port->read_pending = the_port->write_pending = false;
|
|
the_port->read_done = the_port->write_done = false;
|
|
the_port->cum_errors = 0;
|
|
|
|
// Open port
|
|
int16 res = the_port->open(ReadMacInt16(0x1fc + ((-(int16)ReadMacInt16(dce + dCtlRefNum)-6) & 2)));
|
|
if (res)
|
|
return res;
|
|
|
|
// Allocate Deferred Task structures
|
|
if ((the_port->dt_store = Mac_sysalloc(SIZEOF_serdt * 2)) == 0)
|
|
return openErr;
|
|
uint32 input_dt = the_port->input_dt = the_port->dt_store;
|
|
uint32 output_dt = the_port->output_dt = the_port->dt_store + SIZEOF_serdt;
|
|
D(bug(" input_dt %08lx, output_dt %08lx\n", input_dt, output_dt));
|
|
|
|
WriteMacInt16(input_dt + qType, dtQType);
|
|
WriteMacInt32(input_dt + dtAddr, input_dt + serdtCode);
|
|
WriteMacInt32(input_dt + dtParam, input_dt + serdtResult);
|
|
// Deferred function for signalling that Prime is complete (pointer to mydtResult in a1)
|
|
WriteMacInt16(input_dt + serdtCode, 0x2019); // move.l (a1)+,d0 (result)
|
|
WriteMacInt16(input_dt + serdtCode + 2, 0x2251); // move.l (a1),a1 (dce)
|
|
WriteMacInt32(input_dt + serdtCode + 4, 0x207808fc); // move.l JIODone,a0
|
|
WriteMacInt16(input_dt + serdtCode + 8, 0x4ed0); // jmp (a0)
|
|
|
|
WriteMacInt16(output_dt + qType, dtQType);
|
|
WriteMacInt32(output_dt + dtAddr, output_dt + serdtCode);
|
|
WriteMacInt32(output_dt + dtParam, output_dt + serdtResult);
|
|
// Deferred function for signalling that Prime is complete (pointer to mydtResult in a1)
|
|
WriteMacInt16(output_dt + serdtCode, 0x2019); // move.l (a1)+,d0 (result)
|
|
WriteMacInt16(output_dt + serdtCode + 2, 0x2251); // move.l (a1),a1 (dce)
|
|
WriteMacInt32(output_dt + serdtCode + 4, 0x207808fc); // move.l JIODone,a0
|
|
WriteMacInt16(output_dt + serdtCode + 8, 0x4ed0); // jmp (a0)
|
|
|
|
the_port->is_open = true;
|
|
return noErr;
|
|
}
|
|
|
|
|
|
/*
|
|
* Driver Prime() routines
|
|
*/
|
|
|
|
int16 SerialPrimeIn(uint32 pb, uint32 dce)
|
|
{
|
|
D(bug("SerialPrimeIn pb %08lx, dce %08lx\n", pb, dce));
|
|
int16 res;
|
|
|
|
SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
|
|
if (!the_port->is_open)
|
|
res = notOpenErr;
|
|
else {
|
|
if (the_port->read_pending) {
|
|
printf("FATAL: SerialPrimeIn() called while request is pending\n");
|
|
res = readErr;
|
|
} else
|
|
res = the_port->prime_in(pb, dce);
|
|
}
|
|
|
|
if (ReadMacInt16(pb + ioTrap) & 0x0200)
|
|
if (res > 0) {
|
|
WriteMacInt16(pb + ioResult, 0);
|
|
return 0; // Command in progress
|
|
} else {
|
|
WriteMacInt16(pb + ioResult, res);
|
|
return res;
|
|
}
|
|
else
|
|
if (res > 0)
|
|
return 0; // Command in progress
|
|
else {
|
|
IOCommandIsComplete(pb, res);
|
|
return res;
|
|
}
|
|
}
|
|
|
|
int16 SerialPrimeOut(uint32 pb, uint32 dce)
|
|
{
|
|
D(bug("SerialPrimeOut pb %08lx, dce %08lx\n", pb, dce));
|
|
int16 res;
|
|
|
|
SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
|
|
if (!the_port->is_open)
|
|
res = notOpenErr;
|
|
else {
|
|
if (the_port->write_pending) {
|
|
printf("FATAL: SerialPrimeOut() called while request is pending\n");
|
|
res = writErr;
|
|
} else
|
|
res = the_port->prime_out(pb, dce);
|
|
}
|
|
|
|
if (ReadMacInt16(pb + ioTrap) & 0x0200)
|
|
if (res > 0) {
|
|
WriteMacInt16(pb + ioResult, 0);
|
|
return 0; // Command in progress
|
|
} else {
|
|
WriteMacInt16(pb + ioResult, res);
|
|
return res;
|
|
}
|
|
else
|
|
if (res > 0)
|
|
return 0; // Command in progress
|
|
else {
|
|
IOCommandIsComplete(pb, res);
|
|
return res;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Driver Control() routine
|
|
*/
|
|
|
|
int16 SerialControl(uint32 pb, uint32 dce)
|
|
{
|
|
uint16 code = ReadMacInt16(pb + csCode);
|
|
D(bug("SerialControl %d, pb %08lx, dce %08lx\n", code, pb, dce));
|
|
int16 res;
|
|
|
|
SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
|
|
if (!the_port->is_open)
|
|
res = notOpenErr;
|
|
else {
|
|
switch (code) {
|
|
case kSERDSetPollWrite:
|
|
res = noErr;
|
|
break;
|
|
default:
|
|
res = the_port->control(pb, dce, code);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (code == 1)
|
|
return res;
|
|
else if (ReadMacInt16(pb + ioTrap) & 0x0200) {
|
|
WriteMacInt16(pb + ioResult, res);
|
|
return res;
|
|
} else {
|
|
IOCommandIsComplete(pb, res);
|
|
return res;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Driver Status() routine
|
|
*/
|
|
|
|
int16 SerialStatus(uint32 pb, uint32 dce)
|
|
{
|
|
uint16 code = ReadMacInt16(pb + csCode);
|
|
D(bug("SerialStatus %d, pb %08lx, dce %08lx\n", code, pb, dce));
|
|
int16 res;
|
|
|
|
SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
|
|
if (!the_port->is_open)
|
|
res = notOpenErr;
|
|
else {
|
|
switch (code) {
|
|
case kSERDVersion:
|
|
WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver
|
|
res = noErr;
|
|
break;
|
|
|
|
case 0x8000:
|
|
WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver
|
|
WriteMacInt16(pb + csParam + 4, 0x1997); // Date of serial driver
|
|
WriteMacInt16(pb + csParam + 6, 0x0616);
|
|
res = noErr;
|
|
break;
|
|
|
|
default:
|
|
res = the_port->status(pb, dce, code);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ReadMacInt16(pb + ioTrap) & 0x0200) {
|
|
WriteMacInt16(pb + ioResult, res);
|
|
return res;
|
|
} else {
|
|
IOCommandIsComplete(pb, res);
|
|
return res;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Driver Close() routine
|
|
*/
|
|
|
|
int16 SerialClose(uint32 pb, uint32 dce)
|
|
{
|
|
D(bug("SerialClose pb %08lx, dce %08lx\n", pb, dce));
|
|
|
|
// Close port if open
|
|
SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
|
|
if (the_port->is_open) {
|
|
Mac_sysfree(the_port->dt_store);
|
|
int16 res = the_port->close();
|
|
the_port->is_open = false;
|
|
return res;
|
|
} else
|
|
return noErr;
|
|
}
|
|
|
|
|
|
/*
|
|
* Serial interrupt - Prime command completed, activate deferred tasks to call IODone
|
|
*/
|
|
|
|
void SerialInterrupt(void)
|
|
{
|
|
D(bug("SerialIRQ\n"));
|
|
|
|
// Port 0
|
|
if (the_serd_port[0]->is_open) {
|
|
if (the_serd_port[0]->read_pending && the_serd_port[0]->read_done) {
|
|
Enqueue(the_serd_port[0]->input_dt, 0xd92);
|
|
the_serd_port[0]->read_pending = the_serd_port[0]->read_done = false;
|
|
}
|
|
if (the_serd_port[0]->write_pending && the_serd_port[0]->write_done) {
|
|
Enqueue(the_serd_port[0]->output_dt, 0xd92);
|
|
the_serd_port[0]->write_pending = the_serd_port[0]->write_done = false;
|
|
}
|
|
}
|
|
|
|
// Port 1
|
|
if (the_serd_port[1]->is_open) {
|
|
if (the_serd_port[1]->read_pending && the_serd_port[1]->read_done) {
|
|
Enqueue(the_serd_port[1]->input_dt, 0xd92);
|
|
the_serd_port[1]->read_pending = the_serd_port[1]->read_done = false;
|
|
}
|
|
if (the_serd_port[1]->write_pending && the_serd_port[1]->write_done) {
|
|
Enqueue(the_serd_port[1]->output_dt, 0xd92);
|
|
the_serd_port[1]->write_pending = the_serd_port[1]->write_done = false;
|
|
}
|
|
}
|
|
}
|