| 1 |
/* |
| 2 |
* serial.cpp - Serial device driver |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2008 Christian Bauer |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
| 21 |
/* |
| 22 |
* SEE ALSO |
| 23 |
* Inside Macintosh: Devices, chapter 7 "Serial Driver" |
| 24 |
* Technote HW 04: "Break/CTS Device Driver Event Structure" |
| 25 |
* Technote 1018: "Understanding the SerialDMA Driver" |
| 26 |
*/ |
| 27 |
|
| 28 |
#include <stdio.h> |
| 29 |
|
| 30 |
#include "sysdeps.h" |
| 31 |
#include "cpu_emulation.h" |
| 32 |
#include "main.h" |
| 33 |
#include "macos_util.h" |
| 34 |
#include "serial.h" |
| 35 |
#include "serial_defs.h" |
| 36 |
|
| 37 |
#include "emul_op.h" |
| 38 |
|
| 39 |
#define DEBUG 0 |
| 40 |
#include "debug.h" |
| 41 |
|
| 42 |
|
| 43 |
// Global variables |
| 44 |
SERDPort *the_serd_port[2]; |
| 45 |
|
| 46 |
|
| 47 |
/* |
| 48 |
* Driver Open() routine |
| 49 |
*/ |
| 50 |
|
| 51 |
int16 SerialOpen(uint32 pb, uint32 dce, int port) |
| 52 |
{ |
| 53 |
D(bug("SerialOpen port %d, pb %08lx, dce %08lx\n", port, pb, dce)); |
| 54 |
|
| 55 |
if (port == 0 || port == 2) { |
| 56 |
|
| 57 |
// Do nothing for input side |
| 58 |
return noErr; |
| 59 |
|
| 60 |
} else { |
| 61 |
|
| 62 |
// Do nothing if port is already open |
| 63 |
SERDPort *the_port = the_serd_port[port >> 1]; |
| 64 |
if (the_port->is_open) |
| 65 |
return noErr; |
| 66 |
|
| 67 |
// Init variables |
| 68 |
the_port->read_pending = the_port->write_pending = false; |
| 69 |
the_port->read_done = the_port->write_done = false; |
| 70 |
the_port->cum_errors = 0; |
| 71 |
|
| 72 |
// Open port |
| 73 |
int16 res = the_port->open(ReadMacInt16(0x1fc + (port & 2))); |
| 74 |
if (res) |
| 75 |
return res; |
| 76 |
|
| 77 |
// Allocate Deferred Task structures |
| 78 |
M68kRegisters r; |
| 79 |
r.d[0] = SIZEOF_serdt * 2; |
| 80 |
Execute68kTrap(0xa71e, &r); // NewPtrSysClear() |
| 81 |
if (r.a[0] == 0) { |
| 82 |
the_port->close(); |
| 83 |
return openErr; |
| 84 |
} |
| 85 |
uint32 input_dt = the_port->input_dt = r.a[0]; |
| 86 |
uint32 output_dt = the_port->output_dt = r.a[0] + SIZEOF_serdt; |
| 87 |
D(bug(" input_dt %08lx, output_dt %08lx\n", input_dt, output_dt)); |
| 88 |
|
| 89 |
WriteMacInt16(input_dt + qType, dtQType); |
| 90 |
WriteMacInt32(input_dt + dtAddr, input_dt + serdtCode); |
| 91 |
WriteMacInt32(input_dt + dtParam, input_dt + serdtResult); |
| 92 |
// Deferred function for signalling that Prime is complete (pointer to mydtResult in a1) |
| 93 |
WriteMacInt16(input_dt + serdtCode, 0x2019); // move.l (a1)+,d0 (result) |
| 94 |
WriteMacInt16(input_dt + serdtCode + 2, 0x2251); // move.l (a1),a1 (dce) |
| 95 |
WriteMacInt32(input_dt + serdtCode + 4, 0x207808fc); // move.l JIODone,a0 |
| 96 |
WriteMacInt16(input_dt + serdtCode + 8, 0x4ed0); // jmp (a0) |
| 97 |
|
| 98 |
WriteMacInt16(output_dt + qType, dtQType); |
| 99 |
WriteMacInt32(output_dt + dtAddr, output_dt + serdtCode); |
| 100 |
WriteMacInt32(output_dt + dtParam, output_dt + serdtResult); |
| 101 |
// Deferred function for signalling that Prime is complete (pointer to mydtResult in a1) |
| 102 |
WriteMacInt16(output_dt + serdtCode, 0x2019); // move.l (a1)+,d0 (result) |
| 103 |
WriteMacInt16(output_dt + serdtCode + 2, 0x2251); // move.l (a1),a1 (dce) |
| 104 |
WriteMacInt32(output_dt + serdtCode + 4, 0x207808fc); // move.l JIODone,a0 |
| 105 |
WriteMacInt16(output_dt + serdtCode + 8, 0x4ed0); // jmp (a0) |
| 106 |
|
| 107 |
the_port->is_open = true; |
| 108 |
return noErr; |
| 109 |
} |
| 110 |
} |
| 111 |
|
| 112 |
|
| 113 |
/* |
| 114 |
* Driver Prime() routine |
| 115 |
*/ |
| 116 |
|
| 117 |
int16 SerialPrime(uint32 pb, uint32 dce, int port) |
| 118 |
{ |
| 119 |
D(bug("SerialPrime port %d, pb %08lx, dce %08lx\n", port, pb, dce)); |
| 120 |
|
| 121 |
// Error if port is not open |
| 122 |
SERDPort *the_port = the_serd_port[port >> 1]; |
| 123 |
if (!the_port->is_open) |
| 124 |
return notOpenErr; |
| 125 |
|
| 126 |
if (port == 0 || port == 2) { |
| 127 |
if (the_port->read_pending) { |
| 128 |
printf("FATAL: SerialPrimeIn() called while request is pending\n"); |
| 129 |
return readErr; |
| 130 |
} else |
| 131 |
return the_port->prime_in(pb, dce); |
| 132 |
} else { |
| 133 |
if (the_port->write_pending) { |
| 134 |
printf("FATAL: SerialPrimeOut() called while request is pending\n"); |
| 135 |
return readErr; |
| 136 |
} else |
| 137 |
return the_port->prime_out(pb, dce); |
| 138 |
} |
| 139 |
} |
| 140 |
|
| 141 |
|
| 142 |
/* |
| 143 |
* Driver Control() routine |
| 144 |
*/ |
| 145 |
|
| 146 |
int16 SerialControl(uint32 pb, uint32 dce, int port) |
| 147 |
{ |
| 148 |
uint16 code = ReadMacInt16(pb + csCode); |
| 149 |
D(bug("SerialControl %d, port %d, pb %08lx, dce %08lx\n", code, port, pb, dce)); |
| 150 |
|
| 151 |
// Error if port is not open |
| 152 |
SERDPort *the_port = the_serd_port[port >> 1]; |
| 153 |
if (!the_port->is_open) |
| 154 |
return notOpenErr; |
| 155 |
|
| 156 |
switch (code) { |
| 157 |
case kSERDSetPollWrite: |
| 158 |
return noErr; |
| 159 |
|
| 160 |
default: |
| 161 |
return the_port->control(pb, dce, code); |
| 162 |
} |
| 163 |
} |
| 164 |
|
| 165 |
|
| 166 |
/* |
| 167 |
* Driver Status() routine |
| 168 |
*/ |
| 169 |
|
| 170 |
int16 SerialStatus(uint32 pb, uint32 dce, int port) |
| 171 |
{ |
| 172 |
uint16 code = ReadMacInt16(pb + csCode); |
| 173 |
D(bug("SerialStatus %d, port %d, pb %08lx, dce %08lx\n", code, port, pb, dce)); |
| 174 |
|
| 175 |
// Error if port is not open |
| 176 |
SERDPort *the_port = the_serd_port[port >> 1]; |
| 177 |
if (!the_port->is_open) |
| 178 |
return notOpenErr; |
| 179 |
|
| 180 |
switch (code) { |
| 181 |
case kSERDVersion: |
| 182 |
WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver |
| 183 |
return noErr; |
| 184 |
|
| 185 |
case 0x8000: |
| 186 |
WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver |
| 187 |
WriteMacInt16(pb + csParam + 4, 0x1997); // Date of serial driver |
| 188 |
WriteMacInt16(pb + csParam + 6, 0x0616); |
| 189 |
return noErr; |
| 190 |
|
| 191 |
default: |
| 192 |
return the_port->status(pb, dce, code); |
| 193 |
} |
| 194 |
} |
| 195 |
|
| 196 |
|
| 197 |
/* |
| 198 |
* Driver Close() routine |
| 199 |
*/ |
| 200 |
|
| 201 |
int16 SerialClose(uint32 pb, uint32 dce, int port) |
| 202 |
{ |
| 203 |
D(bug("SerialClose port %d, pb %08lx, dce %08lx\n", port, pb, dce)); |
| 204 |
|
| 205 |
if (port == 0 || port == 2) { |
| 206 |
|
| 207 |
// Do nothing for input side |
| 208 |
return noErr; |
| 209 |
|
| 210 |
} else { |
| 211 |
|
| 212 |
// Close port if open |
| 213 |
SERDPort *the_port = the_serd_port[port >> 1]; |
| 214 |
if (the_port->is_open) { |
| 215 |
int16 res = the_port->close(); |
| 216 |
M68kRegisters r; // Free Deferred Task structures |
| 217 |
r.a[0] = the_port->input_dt; |
| 218 |
Execute68kTrap(0xa01f, &r); // DisposePtr() |
| 219 |
the_port->is_open = false; |
| 220 |
return res; |
| 221 |
} else |
| 222 |
return noErr; |
| 223 |
} |
| 224 |
} |
| 225 |
|
| 226 |
|
| 227 |
/* |
| 228 |
* Serial interrupt - Prime command completed, activate deferred tasks to call IODone |
| 229 |
*/ |
| 230 |
|
| 231 |
static void serial_irq(SERDPort *p) |
| 232 |
{ |
| 233 |
if (p->is_open) { |
| 234 |
if (p->read_pending && p->read_done) { |
| 235 |
EnqueueMac(p->input_dt, 0xd92); |
| 236 |
p->read_pending = p->read_done = false; |
| 237 |
} |
| 238 |
if (p->write_pending && p->write_done) { |
| 239 |
EnqueueMac(p->output_dt, 0xd92); |
| 240 |
p->write_pending = p->write_done = false; |
| 241 |
} |
| 242 |
} |
| 243 |
} |
| 244 |
|
| 245 |
void SerialInterrupt(void) |
| 246 |
{ |
| 247 |
D(bug("SerialIRQ\n")); |
| 248 |
|
| 249 |
serial_irq(the_serd_port[0]); |
| 250 |
serial_irq(the_serd_port[1]); |
| 251 |
} |
