| 1 | /* Remote serial interface for local (hardwired) serial ports for Macintosh. |
| 2 | Copyright 1994 Free Software Foundation, Inc. |
| 3 | Contributed by Cygnus Support. Written by Stan Shebs. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "serial.h" |
| 23 | |
| 24 | #include <Types.h> |
| 25 | #include <Devices.h> |
| 26 | /* This is the regular Mac Serial.h, but copied to a different name |
| 27 | so as not to get confused with the GDB serial.h above. */ |
| 28 | #include "MacSerial.h" |
| 29 | |
| 30 | /* This is unused for now. We just return a placeholder. */ |
| 31 | |
| 32 | struct mac_ttystate |
| 33 | { |
| 34 | int bogus; |
| 35 | }; |
| 36 | |
| 37 | static int mac_open PARAMS ((serial_t scb, const char *name)); |
| 38 | static void mac_raw PARAMS ((serial_t scb)); |
| 39 | static int mac_readchar PARAMS ((serial_t scb, int timeout)); |
| 40 | static int mac_setbaudrate PARAMS ((serial_t scb, int rate)); |
| 41 | static int mac_write PARAMS ((serial_t scb, const char *str, int len)); |
| 42 | static void mac_close PARAMS ((serial_t scb)); |
| 43 | static serial_ttystate mac_get_tty_state PARAMS ((serial_t scb)); |
| 44 | static int mac_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); |
| 45 | static char *aptr PARAMS ((short p)); |
| 46 | |
| 47 | short input_refnum; |
| 48 | short output_refnum; |
| 49 | |
| 50 | char *mac_input_buffer; |
| 51 | char *mac_output_buffer; |
| 52 | |
| 53 | static int |
| 54 | mac_open (scb, name) |
| 55 | serial_t scb; |
| 56 | const char *name; |
| 57 | { |
| 58 | OSErr err; |
| 59 | |
| 60 | /* Alloc buffer space first - that way any allocation failures are |
| 61 | intercepted before the serial driver gets involved. */ |
| 62 | if (mac_input_buffer == NULL) |
| 63 | mac_input_buffer = (char *) xmalloc (256); |
| 64 | /* Match on a name and open a port. */ |
| 65 | if (strcmp (name, "modem") == 0) |
| 66 | { |
| 67 | err = OpenDriver ("\p.AIn", &input_refnum); |
| 68 | if (err != 0) |
| 69 | { |
| 70 | return (-1); |
| 71 | } |
| 72 | err = OpenDriver ("\p.AOut", &output_refnum); |
| 73 | if (err != 0) |
| 74 | { |
| 75 | CloseDriver (input_refnum); |
| 76 | return (-1); |
| 77 | } |
| 78 | } |
| 79 | else if (strcmp (name, "printer") == 0) |
| 80 | { |
| 81 | err = OpenDriver ("\p.BIn", &input_refnum); |
| 82 | if (err != 0) |
| 83 | { |
| 84 | return (-1); |
| 85 | } |
| 86 | err = OpenDriver ("\p.BOut", &output_refnum); |
| 87 | if (err != 0) |
| 88 | { |
| 89 | CloseDriver (input_refnum); |
| 90 | return (-1); |
| 91 | } |
| 92 | /* fake */ |
| 93 | scb->fd = 1; |
| 94 | return 0; |
| 95 | } |
| 96 | else |
| 97 | { |
| 98 | error ("You must specify a valid serial port name; your choices are `modem' or `printer'."); |
| 99 | errno = ENOENT; |
| 100 | return (-1); |
| 101 | } |
| 102 | /* We got something open. */ |
| 103 | if (1 /* using custom buffer */) |
| 104 | SerSetBuf (input_refnum, mac_input_buffer, 256); |
| 105 | /* Set to a GDB-preferred state. */ |
| 106 | SerReset (input_refnum, stop10|noParity|data8|baud9600); |
| 107 | SerReset (output_refnum, stop10|noParity|data8|baud9600); |
| 108 | { |
| 109 | CntrlParam cb; |
| 110 | struct SerShk *handshake; |
| 111 | |
| 112 | cb.ioCRefNum = output_refnum; |
| 113 | cb.csCode = 14; |
| 114 | handshake = (struct SerShk *) &cb.csParam[0]; |
| 115 | handshake->fXOn = 0; |
| 116 | handshake->fCTS = 0; |
| 117 | handshake->xOn = 0; |
| 118 | handshake->xOff = 0; |
| 119 | handshake->errs = 0; |
| 120 | handshake->evts = 0; |
| 121 | handshake->fInX = 0; |
| 122 | handshake->fDTR = 0; |
| 123 | err = PBControl ((ParmBlkPtr) &cb, 0); |
| 124 | if (err < 0) |
| 125 | return (-1); |
| 126 | } |
| 127 | /* fake */ |
| 128 | scb->fd = 1; |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | static int |
| 133 | mac_noop (scb) |
| 134 | serial_t scb; |
| 135 | { |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | static void |
| 140 | mac_raw (scb) |
| 141 | serial_t scb; |
| 142 | { |
| 143 | /* Always effectively in raw mode. */ |
| 144 | } |
| 145 | |
| 146 | /* Read a character with user-specified timeout. TIMEOUT is number of seconds |
| 147 | to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns |
| 148 | char if successful. Returns -2 if timeout expired, EOF if line dropped |
| 149 | dead, or -3 for any other error (see errno in that case). */ |
| 150 | |
| 151 | static int |
| 152 | mac_readchar (scb, timeout) |
| 153 | serial_t scb; |
| 154 | int timeout; |
| 155 | { |
| 156 | int status, n; |
| 157 | /* time_t */ unsigned long start_time, now; |
| 158 | OSErr err; |
| 159 | CntrlParam cb; |
| 160 | IOParam pb; |
| 161 | |
| 162 | if (scb->bufcnt-- > 0) |
| 163 | return *scb->bufp++; |
| 164 | |
| 165 | time (&start_time); |
| 166 | |
| 167 | while (1) |
| 168 | { |
| 169 | cb.ioCRefNum = input_refnum; |
| 170 | cb.csCode = 2; |
| 171 | err = PBStatus ((ParmBlkPtr) &cb, 0); |
| 172 | if (err < 0) |
| 173 | return SERIAL_ERROR; |
| 174 | n = *((long *) &cb.csParam[0]); |
| 175 | if (n > 0) |
| 176 | { |
| 177 | pb.ioRefNum = input_refnum; |
| 178 | pb.ioBuffer = (Ptr) (scb->buf); |
| 179 | pb.ioReqCount = (n > 64 ? 64 : n); |
| 180 | err = PBRead ((ParmBlkPtr) &pb, 0); |
| 181 | if (err < 0) |
| 182 | return SERIAL_ERROR; |
| 183 | scb->bufcnt = pb.ioReqCount; |
| 184 | scb->bufcnt--; |
| 185 | scb->bufp = scb->buf; |
| 186 | return *scb->bufp++; |
| 187 | } |
| 188 | else if (timeout == 0) |
| 189 | return SERIAL_TIMEOUT; |
| 190 | else if (timeout == -1) |
| 191 | ; |
| 192 | else |
| 193 | { |
| 194 | time (&now); |
| 195 | if (now > start_time + timeout) |
| 196 | return SERIAL_TIMEOUT; |
| 197 | } |
| 198 | PROGRESS (1); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /* mac_{get set}_tty_state() are both dummys to fill out the function |
| 203 | vector. Someday, they may do something real... */ |
| 204 | |
| 205 | static serial_ttystate |
| 206 | mac_get_tty_state (scb) |
| 207 | serial_t scb; |
| 208 | { |
| 209 | struct mac_ttystate *state; |
| 210 | |
| 211 | state = (struct mac_ttystate *) xmalloc (sizeof *state); |
| 212 | |
| 213 | return (serial_ttystate) state; |
| 214 | } |
| 215 | |
| 216 | static int |
| 217 | mac_set_tty_state (scb, ttystate) |
| 218 | serial_t scb; |
| 219 | serial_ttystate ttystate; |
| 220 | { |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | static int |
| 225 | mac_noflush_set_tty_state (scb, new_ttystate, old_ttystate) |
| 226 | serial_t scb; |
| 227 | serial_ttystate new_ttystate; |
| 228 | serial_ttystate old_ttystate; |
| 229 | { |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | static void |
| 234 | mac_print_tty_state (scb, ttystate) |
| 235 | serial_t scb; |
| 236 | serial_ttystate ttystate; |
| 237 | { |
| 238 | /* Nothing to print. */ |
| 239 | return; |
| 240 | } |
| 241 | |
| 242 | /* If there is a tricky formula to relate real baud rates |
| 243 | to what the serial driver wants, we should use it. Until |
| 244 | we get one, this table will have to do. */ |
| 245 | |
| 246 | static struct { |
| 247 | int real_rate; |
| 248 | int bits; |
| 249 | } mac_baud_rate_table[] = { |
| 250 | { 57600, baud57600 }, |
| 251 | { 38400, 1 }, |
| 252 | { 19200, baud19200 }, |
| 253 | { 9600, baud9600 }, |
| 254 | { 7200, baud7200 }, |
| 255 | { 4800, baud4800 }, |
| 256 | { 3600, baud3600 }, |
| 257 | { 2400, baud2400 }, |
| 258 | { 1800, baud1800 }, |
| 259 | { 1200, baud1200 }, |
| 260 | { 600, baud600 }, |
| 261 | { 300, baud300 }, |
| 262 | { 0, 0 } |
| 263 | }; |
| 264 | |
| 265 | static int |
| 266 | mac_set_baud_rate (scb, rate) |
| 267 | serial_t scb; |
| 268 | int rate; |
| 269 | { |
| 270 | int i, bits; |
| 271 | |
| 272 | for (i = 0; mac_baud_rate_table[i].real_rate != 0; ++i) |
| 273 | { |
| 274 | if (mac_baud_rate_table[i].real_rate == rate) |
| 275 | { |
| 276 | bits = mac_baud_rate_table[i].bits; |
| 277 | break; |
| 278 | } |
| 279 | } |
| 280 | SerReset (input_refnum, stop10|noParity|data8|bits); |
| 281 | SerReset (output_refnum, stop10|noParity|data8|bits); |
| 282 | } |
| 283 | |
| 284 | static int |
| 285 | mac_set_stop_bits (scb, num) |
| 286 | serial_t scb; |
| 287 | int num; |
| 288 | { |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | int first_mac_write = 0; |
| 293 | |
| 294 | static int |
| 295 | mac_write (scb, str, len) |
| 296 | serial_t scb; |
| 297 | const char *str; |
| 298 | int len; |
| 299 | { |
| 300 | OSErr err; |
| 301 | IOParam pb; |
| 302 | |
| 303 | if (first_mac_write++ < 4) |
| 304 | { |
| 305 | sleep (1); |
| 306 | } |
| 307 | pb.ioRefNum = output_refnum; |
| 308 | pb.ioBuffer = (Ptr) str; |
| 309 | pb.ioReqCount = len; |
| 310 | err = PBWrite ((ParmBlkPtr) &pb, 0); |
| 311 | if (err < 0) |
| 312 | { |
| 313 | return 1; |
| 314 | } |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | static void |
| 319 | mac_close (serial_t scb) |
| 320 | { |
| 321 | if (input_refnum) |
| 322 | { |
| 323 | if (1 /* custom buffer */) |
| 324 | SerSetBuf (input_refnum, mac_input_buffer, 0); |
| 325 | CloseDriver (input_refnum); |
| 326 | input_refnum = 0; |
| 327 | } |
| 328 | if (output_refnum) |
| 329 | { |
| 330 | if (0 /* custom buffer */) |
| 331 | SetSetBuf (input_refnum, mac_output_buffer, 0); |
| 332 | CloseDriver (output_refnum); |
| 333 | output_refnum = 0; |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | static struct serial_ops mac_ops = |
| 338 | { |
| 339 | "hardwire", |
| 340 | 0, |
| 341 | mac_open, |
| 342 | mac_close, |
| 343 | mac_readchar, |
| 344 | mac_write, |
| 345 | mac_noop, /* flush output */ |
| 346 | mac_noop, /* flush input */ |
| 347 | mac_noop, /* send break -- currently only for nindy */ |
| 348 | mac_raw, |
| 349 | mac_get_tty_state, |
| 350 | mac_set_tty_state, |
| 351 | mac_print_tty_state, |
| 352 | mac_noflush_set_tty_state, |
| 353 | mac_set_baud_rate, |
| 354 | mac_set_stop_bits, |
| 355 | }; |
| 356 | |
| 357 | void |
| 358 | _initialize_ser_mac () |
| 359 | { |
| 360 | serial_add_interface (&mac_ops); |
| 361 | } |