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- /*
- * serial.cpp - Serial device driver
- *
- * Basilisk II (C) 1997-2001 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
- */
-
- /*
- * SEE ALSO
- * Inside Macintosh: Devices, chapter 7 "Serial Driver"
- * Technote HW 04: "Break/CTS Device Driver Event Structure"
- * Technote 1018: "Understanding the SerialDMA Driver"
- */
-
- #include <stdio.h>
-
- #include "sysdeps.h"
- #include "cpu_emulation.h"
- #include "main.h"
- #include "macos_util.h"
- #include "serial.h"
- #include "serial_defs.h"
-
- #include "emul_op.h"
-
- #define DEBUG 0
- #include "debug.h"
-
-
- // Global variables
- SERDPort *the_serd_port[2];
-
-
- /*
- * Driver Open() routine
- */
-
- int16 SerialOpen(uint32 pb, uint32 dce, int port)
- {
- D(bug("SerialOpen port %d, pb %08lx, dce %08lx\n", port, pb, dce));
-
- if (port == 0 || port == 2) {
-
- // Do nothing for input side
- return noErr;
-
- } else {
-
- // Do nothing if port is already open
- SERDPort *the_port = the_serd_port[port >> 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 + (port & 2)));
- if (res)
- return res;
-
- // Allocate Deferred Task structures
- M68kRegisters r;
- r.d[0] = SIZEOF_serdt * 2;
- Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
- if (r.a[0] == 0) {
- the_port->close();
- return openErr;
- }
- uint32 input_dt = the_port->input_dt = r.a[0];
- uint32 output_dt = the_port->output_dt = r.a[0] + 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() routine
- */
-
- int16 SerialPrime(uint32 pb, uint32 dce, int port)
- {
- D(bug("SerialPrime port %d, pb %08lx, dce %08lx\n", port, pb, dce));
-
- // Error if port is not open
- SERDPort *the_port = the_serd_port[port >> 1];
- if (!the_port->is_open)
- return notOpenErr;
-
- if (port == 0 || port == 2) {
- if (the_port->read_pending) {
- printf("FATAL: SerialPrimeIn() called while request is pending\n");
- return readErr;
- } else
- return the_port->prime_in(pb, dce);
- } else {
- if (the_port->write_pending) {
- printf("FATAL: SerialPrimeOut() called while request is pending\n");
- return readErr;
- } else
- return the_port->prime_out(pb, dce);
- }
- }
-
-
- /*
- * Driver Control() routine
- */
-
- int16 SerialControl(uint32 pb, uint32 dce, int port)
- {
- uint16 code = ReadMacInt16(pb + csCode);
- D(bug("SerialControl %d, port %d, pb %08lx, dce %08lx\n", code, port, pb, dce));
-
- // Error if port is not open
- SERDPort *the_port = the_serd_port[port >> 1];
- if (!the_port->is_open)
- return notOpenErr;
-
- switch (code) {
- case kSERDSetPollWrite:
- return noErr;
-
- default:
- return the_port->control(pb, dce, code);
- }
- }
-
-
- /*
- * Driver Status() routine
- */
-
- int16 SerialStatus(uint32 pb, uint32 dce, int port)
- {
- uint16 code = ReadMacInt16(pb + csCode);
- D(bug("SerialStatus %d, port %d, pb %08lx, dce %08lx\n", code, port, pb, dce));
-
- // Error if port is not open
- SERDPort *the_port = the_serd_port[port >> 1];
- if (!the_port->is_open)
- return notOpenErr;
-
- switch (code) {
- case kSERDVersion:
- WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver
- return noErr;
-
- case 0x8000:
- WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver
- WriteMacInt16(pb + csParam + 4, 0x1997); // Date of serial driver
- WriteMacInt16(pb + csParam + 6, 0x0616);
- return noErr;
-
- default:
- return the_port->status(pb, dce, code);
- }
- }
-
-
- /*
- * Driver Close() routine
- */
-
- int16 SerialClose(uint32 pb, uint32 dce, int port)
- {
- D(bug("SerialClose port %d, pb %08lx, dce %08lx\n", port, pb, dce));
-
- if (port == 0 || port == 2) {
-
- // Do nothing for input side
- return noErr;
-
- } else {
-
- // Close port if open
- SERDPort *the_port = the_serd_port[port >> 1];
- if (the_port->is_open) {
- int16 res = the_port->close();
- M68kRegisters r; // Free Deferred Task structures
- r.a[0] = the_port->input_dt;
- Execute68kTrap(0xa01f, &r); // DisposePtr()
- the_port->is_open = false;
- return res;
- } else
- return noErr;
- }
- }
-
-
- /*
- * Serial interrupt - Prime command completed, activate deferred tasks to call IODone
- */
-
- static void serial_irq(SERDPort *p)
- {
- if (p->is_open) {
- if (p->read_pending && p->read_done) {
- EnqueueMac(p->input_dt, 0xd92);
- p->read_pending = p->read_done = false;
- }
- if (p->write_pending && p->write_done) {
- EnqueueMac(p->output_dt, 0xd92);
- p->write_pending = p->write_done = false;
- }
- }
- }
-
- void SerialInterrupt(void)
- {
- D(bug("SerialIRQ\n"));
-
- serial_irq(the_serd_port[0]);
- serial_irq(the_serd_port[1]);
- }
-