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cebix |
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/* |
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* serial.cpp - Serial device driver |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/* |
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* SEE ALSO |
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* Inside Macintosh: Devices, chapter 7 "Serial Driver" |
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* Technote HW 04: "Break/CTS Device Driver Event Structure" |
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* Technote 1018: "Understanding the SerialDMA Driver" |
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*/ |
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#include <stdio.h> |
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "main.h" |
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#include "macos_util.h" |
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#include "serial.h" |
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#include "serial_defs.h" |
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#include "emul_op.h" |
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#define DEBUG 0 |
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#include "debug.h" |
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// Global variables |
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SERDPort *the_serd_port[2]; |
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/* |
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* Driver Open() routine |
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*/ |
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int16 SerialOpen(uint32 pb, uint32 dce, int port) |
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{ |
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D(bug("SerialOpen port %d, pb %08lx, dce %08lx\n", port, pb, dce)); |
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if (port == 0 || port == 2) { |
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// Do nothing for input side |
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return noErr; |
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} else { |
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// Do nothing if port is already open |
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SERDPort *the_port = the_serd_port[port >> 1]; |
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if (the_port->is_open) |
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return noErr; |
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// Init variables |
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the_port->read_pending = the_port->write_pending = false; |
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the_port->read_done = the_port->write_done = false; |
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the_port->cum_errors = 0; |
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// Open port |
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cebix |
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int16 res = the_port->open(ReadMacInt16(0x1fc + (port & 2))); |
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cebix |
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if (res) |
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return res; |
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// Allocate Deferred Task structures |
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M68kRegisters r; |
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r.d[0] = SIZEOF_serdt * 2; |
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Execute68kTrap(0xa71e, &r); // NewPtrSysClear() |
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if (r.a[0] == 0) { |
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cebix |
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the_port->close(); |
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cebix |
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return openErr; |
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} |
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uint32 input_dt = the_port->input_dt = r.a[0]; |
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uint32 output_dt = the_port->output_dt = r.a[0] + SIZEOF_serdt; |
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D(bug(" input_dt %08lx, output_dt %08lx\n", input_dt, output_dt)); |
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WriteMacInt16(input_dt + qType, dtQType); |
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WriteMacInt32(input_dt + dtAddr, input_dt + serdtCode); |
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WriteMacInt32(input_dt + dtParam, input_dt + serdtResult); |
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// Deferred function for signalling that Prime is complete (pointer to mydtResult in a1) |
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WriteMacInt16(input_dt + serdtCode, 0x2019); // move.l (a1)+,d0 (result) |
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WriteMacInt16(input_dt + serdtCode + 2, 0x2251); // move.l (a1),a1 (dce) |
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WriteMacInt32(input_dt + serdtCode + 4, 0x207808fc); // move.l JIODone,a0 |
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WriteMacInt16(input_dt + serdtCode + 8, 0x4ed0); // jmp (a0) |
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WriteMacInt16(output_dt + qType, dtQType); |
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WriteMacInt32(output_dt + dtAddr, output_dt + serdtCode); |
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WriteMacInt32(output_dt + dtParam, output_dt + serdtResult); |
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// Deferred function for signalling that Prime is complete (pointer to mydtResult in a1) |
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WriteMacInt16(output_dt + serdtCode, 0x2019); // move.l (a1)+,d0 (result) |
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WriteMacInt16(output_dt + serdtCode + 2, 0x2251); // move.l (a1),a1 (dce) |
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WriteMacInt32(output_dt + serdtCode + 4, 0x207808fc); // move.l JIODone,a0 |
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WriteMacInt16(output_dt + serdtCode + 8, 0x4ed0); // jmp (a0) |
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the_port->is_open = true; |
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return noErr; |
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} |
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} |
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/* |
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* Driver Prime() routine |
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*/ |
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int16 SerialPrime(uint32 pb, uint32 dce, int port) |
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{ |
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D(bug("SerialPrime port %d, pb %08lx, dce %08lx\n", port, pb, dce)); |
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// Error if port is not open |
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SERDPort *the_port = the_serd_port[port >> 1]; |
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if (!the_port->is_open) |
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return notOpenErr; |
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if (port == 0 || port == 2) { |
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if (the_port->read_pending) { |
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printf("FATAL: SerialPrimeIn() called while request is pending\n"); |
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return readErr; |
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} else |
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cebix |
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return the_port->prime_in(pb, dce); |
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cebix |
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} else { |
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if (the_port->write_pending) { |
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printf("FATAL: SerialPrimeOut() called while request is pending\n"); |
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return readErr; |
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} else |
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cebix |
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return the_port->prime_out(pb, dce); |
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cebix |
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} |
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} |
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/* |
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* Driver Control() routine |
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*/ |
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int16 SerialControl(uint32 pb, uint32 dce, int port) |
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{ |
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uint16 code = ReadMacInt16(pb + csCode); |
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D(bug("SerialControl %d, port %d, pb %08lx, dce %08lx\n", code, port, pb, dce)); |
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// Error if port is not open |
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SERDPort *the_port = the_serd_port[port >> 1]; |
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if (!the_port->is_open) |
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return notOpenErr; |
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switch (code) { |
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case kSERDSetPollWrite: |
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return noErr; |
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default: |
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cebix |
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return the_port->control(pb, dce, code); |
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cebix |
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} |
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} |
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/* |
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* Driver Status() routine |
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*/ |
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int16 SerialStatus(uint32 pb, uint32 dce, int port) |
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{ |
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uint16 code = ReadMacInt16(pb + csCode); |
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D(bug("SerialStatus %d, port %d, pb %08lx, dce %08lx\n", code, port, pb, dce)); |
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// Error if port is not open |
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SERDPort *the_port = the_serd_port[port >> 1]; |
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if (!the_port->is_open) |
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return notOpenErr; |
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switch (code) { |
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case kSERDVersion: |
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WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver |
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return noErr; |
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case 0x8000: |
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WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver |
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WriteMacInt16(pb + csParam + 4, 0x1997); // Date of serial driver |
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WriteMacInt16(pb + csParam + 6, 0x0616); |
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return noErr; |
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default: |
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cebix |
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return the_port->status(pb, dce, code); |
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cebix |
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} |
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} |
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/* |
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* Driver Close() routine |
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*/ |
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int16 SerialClose(uint32 pb, uint32 dce, int port) |
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{ |
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D(bug("SerialClose port %d, pb %08lx, dce %08lx\n", port, pb, dce)); |
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if (port == 0 || port == 2) { |
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// Do nothing for input side |
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return noErr; |
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} else { |
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// Close port if open |
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SERDPort *the_port = the_serd_port[port >> 1]; |
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if (the_port->is_open) { |
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cebix |
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int16 res = the_port->close(); |
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cebix |
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M68kRegisters r; // Free Deferred Task structures |
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r.a[0] = the_port->input_dt; |
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Execute68kTrap(0xa01f, &r); // DisposePtr() |
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the_port->is_open = false; |
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return res; |
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} else |
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return noErr; |
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} |
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} |
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/* |
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* Serial interrupt - Prime command completed, activate deferred tasks to call IODone |
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*/ |
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static void serial_irq(SERDPort *p) |
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{ |
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if (p->is_open) { |
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if (p->read_pending && p->read_done) { |
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cebix |
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EnqueueMac(p->input_dt, 0xd92); |
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cebix |
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p->read_pending = p->read_done = false; |
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} |
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if (p->write_pending && p->write_done) { |
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cebix |
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EnqueueMac(p->output_dt, 0xd92); |
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cebix |
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p->write_pending = p->write_done = false; |
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} |
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} |
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} |
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void SerialInterrupt(void) |
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{ |
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D(bug("SerialIRQ\n")); |
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serial_irq(the_serd_port[0]); |
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serial_irq(the_serd_port[1]); |
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} |
