Commit | Line | Data |
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c906108c | 1 | /* Serial interface for local (hardwired) serial ports on Un*x like systems |
1e4728e7 | 2 | |
618f726f | 3 | Copyright (C) 1992-2016 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
21 | #include "serial.h" | |
3eb25fda | 22 | #include "ser-base.h" |
c2c6d25f JM |
23 | #include "ser-unix.h" |
24 | ||
c906108c SS |
25 | #include <fcntl.h> |
26 | #include <sys/types.h> | |
27 | #include "terminal.h" | |
c2c6d25f | 28 | #include <sys/socket.h> |
438e1e42 | 29 | #include "gdb_sys_time.h" |
c2c6d25f | 30 | |
0ea3f30e | 31 | #include "gdb_select.h" |
23776285 | 32 | #include "gdbcmd.h" |
614c279d | 33 | #include "filestuff.h" |
c2c6d25f | 34 | |
c906108c SS |
35 | #ifdef HAVE_TERMIOS |
36 | ||
37 | struct hardwire_ttystate | |
c5aa993b JM |
38 | { |
39 | struct termios termios; | |
40 | }; | |
23776285 MR |
41 | |
42 | #ifdef CRTSCTS | |
43 | /* Boolean to explicitly enable or disable h/w flow control. */ | |
44 | static int serial_hwflow; | |
45 | static void | |
46 | show_serial_hwflow (struct ui_file *file, int from_tty, | |
47 | struct cmd_list_element *c, const char *value) | |
48 | { | |
49 | fprintf_filtered (file, _("Hardware flow control is %s.\n"), value); | |
50 | } | |
51 | #endif | |
52 | ||
c906108c SS |
53 | #endif /* termios */ |
54 | ||
55 | #ifdef HAVE_TERMIO | |
56 | ||
57 | /* It is believed that all systems which have added job control to SVR3 | |
58 | (e.g. sco) have also added termios. Even if not, trying to figure out | |
59 | all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty | |
60 | bewildering. So we don't attempt it. */ | |
61 | ||
62 | struct hardwire_ttystate | |
c5aa993b JM |
63 | { |
64 | struct termio termio; | |
65 | }; | |
c906108c SS |
66 | #endif /* termio */ |
67 | ||
68 | #ifdef HAVE_SGTTY | |
c906108c | 69 | struct hardwire_ttystate |
c5aa993b JM |
70 | { |
71 | struct sgttyb sgttyb; | |
72 | struct tchars tc; | |
73 | struct ltchars ltc; | |
74 | /* Line discipline flags. */ | |
75 | int lmode; | |
76 | }; | |
c906108c SS |
77 | #endif /* sgtty */ |
78 | ||
819cc324 AC |
79 | static int hardwire_open (struct serial *scb, const char *name); |
80 | static void hardwire_raw (struct serial *scb); | |
81 | static int wait_for (struct serial *scb, int timeout); | |
82 | static int hardwire_readchar (struct serial *scb, int timeout); | |
83 | static int do_hardwire_readchar (struct serial *scb, int timeout); | |
c2c6d25f | 84 | static int rate_to_code (int rate); |
819cc324 | 85 | static int hardwire_setbaudrate (struct serial *scb, int rate); |
236af5e3 | 86 | static int hardwire_setparity (struct serial *scb, int parity); |
819cc324 AC |
87 | static void hardwire_close (struct serial *scb); |
88 | static int get_tty_state (struct serial *scb, | |
89 | struct hardwire_ttystate * state); | |
90 | static int set_tty_state (struct serial *scb, | |
91 | struct hardwire_ttystate * state); | |
92 | static serial_ttystate hardwire_get_tty_state (struct serial *scb); | |
93 | static int hardwire_set_tty_state (struct serial *scb, serial_ttystate state); | |
94 | static int hardwire_noflush_set_tty_state (struct serial *, serial_ttystate, | |
95 | serial_ttystate); | |
96 | static void hardwire_print_tty_state (struct serial *, serial_ttystate, | |
97 | struct ui_file *); | |
98 | static int hardwire_drain_output (struct serial *); | |
99 | static int hardwire_flush_output (struct serial *); | |
100 | static int hardwire_flush_input (struct serial *); | |
101 | static int hardwire_send_break (struct serial *); | |
102 | static int hardwire_setstopbits (struct serial *, int); | |
103 | ||
c2c6d25f JM |
104 | void _initialize_ser_hardwire (void); |
105 | ||
c378eb4e | 106 | /* Open up a real live device for serial I/O. */ |
c906108c SS |
107 | |
108 | static int | |
819cc324 | 109 | hardwire_open (struct serial *scb, const char *name) |
c906108c | 110 | { |
614c279d | 111 | scb->fd = gdb_open_cloexec (name, O_RDWR, 0); |
c906108c SS |
112 | if (scb->fd < 0) |
113 | return -1; | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static int | |
819cc324 | 119 | get_tty_state (struct serial *scb, struct hardwire_ttystate *state) |
c906108c SS |
120 | { |
121 | #ifdef HAVE_TERMIOS | |
c5aa993b | 122 | if (tcgetattr (scb->fd, &state->termios) < 0) |
c906108c SS |
123 | return -1; |
124 | ||
125 | return 0; | |
126 | #endif | |
127 | ||
128 | #ifdef HAVE_TERMIO | |
129 | if (ioctl (scb->fd, TCGETA, &state->termio) < 0) | |
130 | return -1; | |
131 | return 0; | |
132 | #endif | |
133 | ||
134 | #ifdef HAVE_SGTTY | |
135 | if (ioctl (scb->fd, TIOCGETP, &state->sgttyb) < 0) | |
136 | return -1; | |
137 | if (ioctl (scb->fd, TIOCGETC, &state->tc) < 0) | |
138 | return -1; | |
139 | if (ioctl (scb->fd, TIOCGLTC, &state->ltc) < 0) | |
140 | return -1; | |
141 | if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0) | |
142 | return -1; | |
143 | ||
144 | return 0; | |
145 | #endif | |
146 | } | |
147 | ||
148 | static int | |
819cc324 | 149 | set_tty_state (struct serial *scb, struct hardwire_ttystate *state) |
c906108c SS |
150 | { |
151 | #ifdef HAVE_TERMIOS | |
c5aa993b | 152 | if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0) |
c906108c SS |
153 | return -1; |
154 | ||
155 | return 0; | |
156 | #endif | |
157 | ||
158 | #ifdef HAVE_TERMIO | |
159 | if (ioctl (scb->fd, TCSETA, &state->termio) < 0) | |
160 | return -1; | |
161 | return 0; | |
162 | #endif | |
163 | ||
164 | #ifdef HAVE_SGTTY | |
165 | if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0) | |
166 | return -1; | |
167 | if (ioctl (scb->fd, TIOCSETC, &state->tc) < 0) | |
168 | return -1; | |
169 | if (ioctl (scb->fd, TIOCSLTC, &state->ltc) < 0) | |
170 | return -1; | |
171 | if (ioctl (scb->fd, TIOCLSET, &state->lmode) < 0) | |
172 | return -1; | |
173 | ||
174 | return 0; | |
175 | #endif | |
176 | } | |
177 | ||
178 | static serial_ttystate | |
819cc324 | 179 | hardwire_get_tty_state (struct serial *scb) |
c906108c | 180 | { |
8d749320 | 181 | struct hardwire_ttystate *state = XNEW (struct hardwire_ttystate); |
c906108c | 182 | |
c5aa993b | 183 | if (get_tty_state (scb, state)) |
0b2381f5 MS |
184 | { |
185 | xfree (state); | |
186 | return NULL; | |
187 | } | |
c906108c | 188 | |
c5aa993b | 189 | return (serial_ttystate) state; |
c906108c SS |
190 | } |
191 | ||
1e182ce8 UW |
192 | static serial_ttystate |
193 | hardwire_copy_tty_state (struct serial *scb, serial_ttystate ttystate) | |
194 | { | |
8d749320 | 195 | struct hardwire_ttystate *state = XNEW (struct hardwire_ttystate); |
1e182ce8 | 196 | |
1e182ce8 UW |
197 | *state = *(struct hardwire_ttystate *) ttystate; |
198 | ||
199 | return (serial_ttystate) state; | |
200 | } | |
201 | ||
c906108c | 202 | static int |
819cc324 | 203 | hardwire_set_tty_state (struct serial *scb, serial_ttystate ttystate) |
c906108c SS |
204 | { |
205 | struct hardwire_ttystate *state; | |
206 | ||
c5aa993b | 207 | state = (struct hardwire_ttystate *) ttystate; |
c906108c | 208 | |
c5aa993b | 209 | return set_tty_state (scb, state); |
c906108c SS |
210 | } |
211 | ||
212 | static int | |
819cc324 | 213 | hardwire_noflush_set_tty_state (struct serial *scb, |
c2c6d25f JM |
214 | serial_ttystate new_ttystate, |
215 | serial_ttystate old_ttystate) | |
c906108c SS |
216 | { |
217 | struct hardwire_ttystate new_state; | |
218 | #ifdef HAVE_SGTTY | |
219 | struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate; | |
220 | #endif | |
221 | ||
c5aa993b | 222 | new_state = *(struct hardwire_ttystate *) new_ttystate; |
c906108c SS |
223 | |
224 | /* Don't change in or out of raw mode; we don't want to flush input. | |
225 | termio and termios have no such restriction; for them flushing input | |
226 | is separate from setting the attributes. */ | |
227 | ||
228 | #ifdef HAVE_SGTTY | |
229 | if (state->sgttyb.sg_flags & RAW) | |
230 | new_state.sgttyb.sg_flags |= RAW; | |
231 | else | |
232 | new_state.sgttyb.sg_flags &= ~RAW; | |
233 | ||
234 | /* I'm not sure whether this is necessary; the manpage just mentions | |
235 | RAW not CBREAK. */ | |
236 | if (state->sgttyb.sg_flags & CBREAK) | |
237 | new_state.sgttyb.sg_flags |= CBREAK; | |
238 | else | |
239 | new_state.sgttyb.sg_flags &= ~CBREAK; | |
240 | #endif | |
241 | ||
242 | return set_tty_state (scb, &new_state); | |
243 | } | |
244 | ||
245 | static void | |
819cc324 | 246 | hardwire_print_tty_state (struct serial *scb, |
c2c6d25f | 247 | serial_ttystate ttystate, |
d9fcf2fb | 248 | struct ui_file *stream) |
c906108c SS |
249 | { |
250 | struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate; | |
251 | int i; | |
252 | ||
253 | #ifdef HAVE_TERMIOS | |
c2c6d25f | 254 | fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n", |
2acceee2 JM |
255 | (int) state->termios.c_iflag, |
256 | (int) state->termios.c_oflag); | |
c2c6d25f | 257 | fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x\n", |
2acceee2 JM |
258 | (int) state->termios.c_cflag, |
259 | (int) state->termios.c_lflag); | |
c906108c SS |
260 | #if 0 |
261 | /* This not in POSIX, and is not really documented by those systems | |
262 | which have it (at least not Sun). */ | |
c2c6d25f | 263 | fprintf_filtered (stream, "c_line = 0x%x.\n", state->termios.c_line); |
c906108c | 264 | #endif |
c2c6d25f | 265 | fprintf_filtered (stream, "c_cc: "); |
c906108c | 266 | for (i = 0; i < NCCS; i += 1) |
c2c6d25f JM |
267 | fprintf_filtered (stream, "0x%x ", state->termios.c_cc[i]); |
268 | fprintf_filtered (stream, "\n"); | |
c906108c SS |
269 | #endif |
270 | ||
271 | #ifdef HAVE_TERMIO | |
c2c6d25f JM |
272 | fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n", |
273 | state->termio.c_iflag, state->termio.c_oflag); | |
274 | fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n", | |
275 | state->termio.c_cflag, state->termio.c_lflag, | |
276 | state->termio.c_line); | |
277 | fprintf_filtered (stream, "c_cc: "); | |
c906108c | 278 | for (i = 0; i < NCC; i += 1) |
c2c6d25f JM |
279 | fprintf_filtered (stream, "0x%x ", state->termio.c_cc[i]); |
280 | fprintf_filtered (stream, "\n"); | |
c906108c SS |
281 | #endif |
282 | ||
283 | #ifdef HAVE_SGTTY | |
c2c6d25f JM |
284 | fprintf_filtered (stream, "sgttyb.sg_flags = 0x%x.\n", |
285 | state->sgttyb.sg_flags); | |
c906108c | 286 | |
c2c6d25f | 287 | fprintf_filtered (stream, "tchars: "); |
c5aa993b | 288 | for (i = 0; i < (int) sizeof (struct tchars); i++) |
c2c6d25f | 289 | fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->tc)[i]); |
64122a8b | 290 | fprintf_filtered (stream, "\n"); |
c906108c | 291 | |
c2c6d25f | 292 | fprintf_filtered (stream, "ltchars: "); |
c5aa993b | 293 | for (i = 0; i < (int) sizeof (struct ltchars); i++) |
c2c6d25f JM |
294 | fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->ltc)[i]); |
295 | fprintf_filtered (stream, "\n"); | |
c906108c | 296 | |
c2c6d25f | 297 | fprintf_filtered (stream, "lmode: 0x%x\n", state->lmode); |
c906108c SS |
298 | #endif |
299 | } | |
300 | ||
c378eb4e MS |
301 | /* Wait for the output to drain away, as opposed to flushing |
302 | (discarding) it. */ | |
c906108c SS |
303 | |
304 | static int | |
819cc324 | 305 | hardwire_drain_output (struct serial *scb) |
c906108c SS |
306 | { |
307 | #ifdef HAVE_TERMIOS | |
308 | return tcdrain (scb->fd); | |
309 | #endif | |
310 | ||
311 | #ifdef HAVE_TERMIO | |
312 | return ioctl (scb->fd, TCSBRK, 1); | |
313 | #endif | |
314 | ||
315 | #ifdef HAVE_SGTTY | |
316 | /* Get the current state and then restore it using TIOCSETP, | |
317 | which should cause the output to drain and pending input | |
c378eb4e | 318 | to be discarded. */ |
c906108c SS |
319 | { |
320 | struct hardwire_ttystate state; | |
433759f7 | 321 | |
c906108c SS |
322 | if (get_tty_state (scb, &state)) |
323 | { | |
324 | return (-1); | |
325 | } | |
326 | else | |
327 | { | |
328 | return (ioctl (scb->fd, TIOCSETP, &state.sgttyb)); | |
329 | } | |
330 | } | |
c5aa993b | 331 | #endif |
c906108c SS |
332 | } |
333 | ||
334 | static int | |
819cc324 | 335 | hardwire_flush_output (struct serial *scb) |
c906108c SS |
336 | { |
337 | #ifdef HAVE_TERMIOS | |
338 | return tcflush (scb->fd, TCOFLUSH); | |
339 | #endif | |
340 | ||
341 | #ifdef HAVE_TERMIO | |
342 | return ioctl (scb->fd, TCFLSH, 1); | |
343 | #endif | |
344 | ||
345 | #ifdef HAVE_SGTTY | |
346 | /* This flushes both input and output, but we can't do better. */ | |
347 | return ioctl (scb->fd, TIOCFLUSH, 0); | |
c5aa993b | 348 | #endif |
c906108c SS |
349 | } |
350 | ||
351 | static int | |
819cc324 | 352 | hardwire_flush_input (struct serial *scb) |
c906108c | 353 | { |
dd5da072 | 354 | ser_base_flush_input (scb); |
c906108c SS |
355 | |
356 | #ifdef HAVE_TERMIOS | |
357 | return tcflush (scb->fd, TCIFLUSH); | |
358 | #endif | |
359 | ||
360 | #ifdef HAVE_TERMIO | |
361 | return ioctl (scb->fd, TCFLSH, 0); | |
362 | #endif | |
363 | ||
364 | #ifdef HAVE_SGTTY | |
365 | /* This flushes both input and output, but we can't do better. */ | |
366 | return ioctl (scb->fd, TIOCFLUSH, 0); | |
c5aa993b | 367 | #endif |
c906108c SS |
368 | } |
369 | ||
370 | static int | |
819cc324 | 371 | hardwire_send_break (struct serial *scb) |
c906108c SS |
372 | { |
373 | #ifdef HAVE_TERMIOS | |
374 | return tcsendbreak (scb->fd, 0); | |
375 | #endif | |
376 | ||
377 | #ifdef HAVE_TERMIO | |
378 | return ioctl (scb->fd, TCSBRK, 0); | |
379 | #endif | |
380 | ||
381 | #ifdef HAVE_SGTTY | |
382 | { | |
383 | int status; | |
c906108c SS |
384 | |
385 | status = ioctl (scb->fd, TIOCSBRK, 0); | |
386 | ||
387 | /* Can't use usleep; it doesn't exist in BSD 4.2. */ | |
dcb626be JB |
388 | /* Note that if this gdb_select() is interrupted by a signal it will not |
389 | wait the full length of time. I think that is OK. */ | |
390 | gdb_usleep (250000); | |
c906108c SS |
391 | status = ioctl (scb->fd, TIOCCBRK, 0); |
392 | return status; | |
393 | } | |
c5aa993b | 394 | #endif |
c906108c SS |
395 | } |
396 | ||
397 | static void | |
819cc324 | 398 | hardwire_raw (struct serial *scb) |
c906108c SS |
399 | { |
400 | struct hardwire_ttystate state; | |
401 | ||
c5aa993b | 402 | if (get_tty_state (scb, &state)) |
3e43a32a MS |
403 | fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", |
404 | safe_strerror (errno)); | |
c906108c SS |
405 | |
406 | #ifdef HAVE_TERMIOS | |
407 | state.termios.c_iflag = 0; | |
408 | state.termios.c_oflag = 0; | |
409 | state.termios.c_lflag = 0; | |
236af5e3 | 410 | state.termios.c_cflag &= ~CSIZE; |
c906108c | 411 | state.termios.c_cflag |= CLOCAL | CS8; |
23776285 MR |
412 | #ifdef CRTSCTS |
413 | /* h/w flow control. */ | |
414 | if (serial_hwflow) | |
415 | state.termios.c_cflag |= CRTSCTS; | |
416 | else | |
417 | state.termios.c_cflag &= ~CRTSCTS; | |
418 | #ifdef CRTS_IFLOW | |
419 | if (serial_hwflow) | |
420 | state.termios.c_cflag |= CRTS_IFLOW; | |
421 | else | |
422 | state.termios.c_cflag &= ~CRTS_IFLOW; | |
423 | #endif | |
424 | #endif | |
c906108c SS |
425 | state.termios.c_cc[VMIN] = 0; |
426 | state.termios.c_cc[VTIME] = 0; | |
427 | #endif | |
428 | ||
429 | #ifdef HAVE_TERMIO | |
430 | state.termio.c_iflag = 0; | |
431 | state.termio.c_oflag = 0; | |
432 | state.termio.c_lflag = 0; | |
236af5e3 | 433 | state.termio.c_cflag &= ~CSIZE; |
c906108c SS |
434 | state.termio.c_cflag |= CLOCAL | CS8; |
435 | state.termio.c_cc[VMIN] = 0; | |
436 | state.termio.c_cc[VTIME] = 0; | |
437 | #endif | |
438 | ||
439 | #ifdef HAVE_SGTTY | |
440 | state.sgttyb.sg_flags |= RAW | ANYP; | |
441 | state.sgttyb.sg_flags &= ~(CBREAK | ECHO); | |
442 | #endif | |
443 | ||
444 | scb->current_timeout = 0; | |
445 | ||
446 | if (set_tty_state (scb, &state)) | |
3e43a32a MS |
447 | fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", |
448 | safe_strerror (errno)); | |
c906108c SS |
449 | } |
450 | ||
451 | /* Wait for input on scb, with timeout seconds. Returns 0 on success, | |
048094ac | 452 | otherwise SERIAL_TIMEOUT or SERIAL_ERROR. */ |
c906108c | 453 | |
2acceee2 | 454 | /* FIXME: cagney/1999-09-16: Don't replace this with the equivalent |
b4505029 | 455 | ser_base*() until the old TERMIOS/SGTTY/... timer code has been |
c378eb4e | 456 | flushed. . */ |
2acceee2 JM |
457 | |
458 | /* NOTE: cagney/1999-09-30: Much of the code below is dead. The only | |
459 | possible values of the TIMEOUT parameter are ONE and ZERO. | |
460 | Consequently all the code that tries to handle the possability of | |
c378eb4e | 461 | an overflowed timer is unnecessary. */ |
c2c6d25f | 462 | |
c906108c | 463 | static int |
819cc324 | 464 | wait_for (struct serial *scb, int timeout) |
c906108c | 465 | { |
ab5ba170 AC |
466 | while (1) |
467 | { | |
468 | struct timeval tv; | |
469 | fd_set readfds; | |
470 | int numfds; | |
c906108c | 471 | |
ab5ba170 AC |
472 | /* NOTE: Some OS's can scramble the READFDS when the select() |
473 | call fails (ex the kernel with Red Hat 5.2). Initialize all | |
c378eb4e | 474 | arguments before each call. */ |
c906108c | 475 | |
ab5ba170 AC |
476 | tv.tv_sec = timeout; |
477 | tv.tv_usec = 0; | |
c906108c | 478 | |
ab5ba170 AC |
479 | FD_ZERO (&readfds); |
480 | FD_SET (scb->fd, &readfds); | |
c906108c | 481 | |
048094ac PA |
482 | QUIT; |
483 | ||
ab5ba170 | 484 | if (timeout >= 0) |
048094ac | 485 | numfds = interruptible_select (scb->fd + 1, &readfds, 0, 0, &tv); |
ab5ba170 | 486 | else |
048094ac | 487 | numfds = interruptible_select (scb->fd + 1, &readfds, 0, 0, 0); |
c906108c | 488 | |
048094ac PA |
489 | if (numfds == -1 && errno == EINTR) |
490 | continue; | |
491 | else if (numfds == -1) | |
492 | return SERIAL_ERROR; | |
493 | else if (numfds == 0) | |
494 | return SERIAL_TIMEOUT; | |
c906108c | 495 | |
ab5ba170 AC |
496 | return 0; |
497 | } | |
c906108c SS |
498 | } |
499 | ||
3e43a32a MS |
500 | /* Read a character with user-specified timeout. TIMEOUT is number of |
501 | seconds to wait, or -1 to wait forever. Use timeout of 0 to effect | |
502 | a poll. Returns char if successful. Returns SERIAL_TIMEOUT if | |
503 | timeout expired, EOF if line dropped dead, or SERIAL_ERROR for any | |
504 | other error (see errno in that case). */ | |
c2c6d25f JM |
505 | |
506 | /* FIXME: cagney/1999-09-16: Don't replace this with the equivalent | |
b4505029 | 507 | ser_base*() until the old TERMIOS/SGTTY/... timer code has been |
c378eb4e | 508 | flushed. */ |
c2c6d25f JM |
509 | |
510 | /* NOTE: cagney/1999-09-16: This function is not identical to | |
b4505029 | 511 | ser_base_readchar() as part of replacing it with ser_base*() |
c2c6d25f | 512 | merging will be required - this code handles the case where read() |
b4505029 | 513 | times out due to no data while ser_base_readchar() doesn't expect |
c378eb4e | 514 | that. */ |
c2c6d25f | 515 | |
c906108c | 516 | static int |
819cc324 | 517 | do_hardwire_readchar (struct serial *scb, int timeout) |
c906108c | 518 | { |
7a292a7a SS |
519 | int status, delta; |
520 | int detach = 0; | |
c906108c | 521 | |
c906108c SS |
522 | if (timeout > 0) |
523 | timeout++; | |
c906108c | 524 | |
2c1ab592 MS |
525 | /* We have to be able to keep the GUI alive here, so we break the |
526 | original timeout into steps of 1 second, running the "keep the | |
527 | GUI alive" hook each time through the loop. | |
528 | ||
529 | Also, timeout = 0 means to poll, so we just set the delta to 0, | |
530 | so we will only go through the loop once. */ | |
c5aa993b | 531 | |
7a292a7a | 532 | delta = (timeout == 0 ? 0 : 1); |
c906108c SS |
533 | while (1) |
534 | { | |
c906108c | 535 | |
7a292a7a SS |
536 | /* N.B. The UI may destroy our world (for instance by calling |
537 | remote_stop,) in which case we want to get out of here as | |
538 | quickly as possible. It is not safe to touch scb, since | |
98bbd631 AC |
539 | someone else might have freed it. The |
540 | deprecated_ui_loop_hook signals that we should exit by | |
541 | returning 1. */ | |
7a292a7a | 542 | |
98bbd631 AC |
543 | if (deprecated_ui_loop_hook) |
544 | detach = deprecated_ui_loop_hook (0); | |
7a292a7a SS |
545 | |
546 | if (detach) | |
547 | return SERIAL_TIMEOUT; | |
548 | ||
549 | scb->timeout_remaining = (timeout < 0 ? timeout : timeout - delta); | |
550 | status = wait_for (scb, delta); | |
551 | ||
c906108c SS |
552 | if (status < 0) |
553 | return status; | |
554 | ||
2acceee2 | 555 | status = read (scb->fd, scb->buf, BUFSIZ); |
c906108c | 556 | |
2acceee2 | 557 | if (status <= 0) |
c906108c | 558 | { |
2acceee2 | 559 | if (status == 0) |
c906108c SS |
560 | { |
561 | /* Zero characters means timeout (it could also be EOF, but | |
c5aa993b | 562 | we don't (yet at least) distinguish). */ |
c906108c SS |
563 | if (scb->timeout_remaining > 0) |
564 | { | |
565 | timeout = scb->timeout_remaining; | |
566 | continue; | |
567 | } | |
c5aa993b JM |
568 | else if (scb->timeout_remaining < 0) |
569 | continue; | |
c906108c SS |
570 | else |
571 | return SERIAL_TIMEOUT; | |
572 | } | |
573 | else if (errno == EINTR) | |
574 | continue; | |
575 | else | |
3e43a32a | 576 | return SERIAL_ERROR; /* Got an error from read. */ |
c906108c SS |
577 | } |
578 | ||
2acceee2 | 579 | scb->bufcnt = status; |
c906108c SS |
580 | scb->bufcnt--; |
581 | scb->bufp = scb->buf; | |
582 | return *scb->bufp++; | |
583 | } | |
584 | } | |
585 | ||
2acceee2 | 586 | static int |
819cc324 | 587 | hardwire_readchar (struct serial *scb, int timeout) |
2acceee2 JM |
588 | { |
589 | return generic_readchar (scb, timeout, do_hardwire_readchar); | |
590 | } | |
591 | ||
592 | ||
c906108c SS |
593 | #ifndef B19200 |
594 | #define B19200 EXTA | |
595 | #endif | |
596 | ||
597 | #ifndef B38400 | |
598 | #define B38400 EXTB | |
599 | #endif | |
600 | ||
601 | /* Translate baud rates from integers to damn B_codes. Unix should | |
602 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ | |
603 | ||
604 | static struct | |
605 | { | |
606 | int rate; | |
607 | int code; | |
608 | } | |
609 | baudtab[] = | |
610 | { | |
c5aa993b JM |
611 | { |
612 | 50, B50 | |
613 | } | |
614 | , | |
615 | { | |
616 | 75, B75 | |
617 | } | |
618 | , | |
619 | { | |
620 | 110, B110 | |
621 | } | |
622 | , | |
623 | { | |
624 | 134, B134 | |
625 | } | |
626 | , | |
627 | { | |
628 | 150, B150 | |
629 | } | |
630 | , | |
631 | { | |
632 | 200, B200 | |
633 | } | |
634 | , | |
635 | { | |
636 | 300, B300 | |
637 | } | |
638 | , | |
639 | { | |
640 | 600, B600 | |
641 | } | |
642 | , | |
643 | { | |
644 | 1200, B1200 | |
645 | } | |
646 | , | |
647 | { | |
648 | 1800, B1800 | |
649 | } | |
650 | , | |
651 | { | |
652 | 2400, B2400 | |
653 | } | |
654 | , | |
655 | { | |
656 | 4800, B4800 | |
657 | } | |
658 | , | |
659 | { | |
660 | 9600, B9600 | |
661 | } | |
662 | , | |
663 | { | |
664 | 19200, B19200 | |
665 | } | |
666 | , | |
667 | { | |
668 | 38400, B38400 | |
669 | } | |
670 | , | |
c906108c | 671 | #ifdef B57600 |
c5aa993b JM |
672 | { |
673 | 57600, B57600 | |
674 | } | |
675 | , | |
c906108c SS |
676 | #endif |
677 | #ifdef B115200 | |
c5aa993b JM |
678 | { |
679 | 115200, B115200 | |
680 | } | |
681 | , | |
c906108c SS |
682 | #endif |
683 | #ifdef B230400 | |
c5aa993b JM |
684 | { |
685 | 230400, B230400 | |
686 | } | |
687 | , | |
c906108c SS |
688 | #endif |
689 | #ifdef B460800 | |
c5aa993b JM |
690 | { |
691 | 460800, B460800 | |
692 | } | |
693 | , | |
c906108c | 694 | #endif |
c5aa993b JM |
695 | { |
696 | -1, -1 | |
697 | } | |
698 | , | |
c906108c SS |
699 | }; |
700 | ||
c5aa993b | 701 | static int |
c2c6d25f | 702 | rate_to_code (int rate) |
c906108c SS |
703 | { |
704 | int i; | |
705 | ||
706 | for (i = 0; baudtab[i].rate != -1; i++) | |
08b4f080 | 707 | { |
c378eb4e | 708 | /* test for perfect macth. */ |
08b4f080 FN |
709 | if (rate == baudtab[i].rate) |
710 | return baudtab[i].code; | |
711 | else | |
712 | { | |
c378eb4e | 713 | /* check if it is in between valid values. */ |
08b4f080 FN |
714 | if (rate < baudtab[i].rate) |
715 | { | |
716 | if (i) | |
717 | { | |
3e43a32a MS |
718 | warning (_("Invalid baud rate %d. " |
719 | "Closest values are %d and %d."), | |
720 | rate, baudtab[i - 1].rate, baudtab[i].rate); | |
08b4f080 FN |
721 | } |
722 | else | |
723 | { | |
8a3fe4f8 | 724 | warning (_("Invalid baud rate %d. Minimum value is %d."), |
3e43a32a | 725 | rate, baudtab[0].rate); |
08b4f080 FN |
726 | } |
727 | return -1; | |
728 | } | |
729 | } | |
730 | } | |
731 | ||
c378eb4e | 732 | /* The requested speed was too large. */ |
8a3fe4f8 | 733 | warning (_("Invalid baud rate %d. Maximum value is %d."), |
08b4f080 | 734 | rate, baudtab[i - 1].rate); |
c906108c SS |
735 | return -1; |
736 | } | |
737 | ||
738 | static int | |
819cc324 | 739 | hardwire_setbaudrate (struct serial *scb, int rate) |
c906108c SS |
740 | { |
741 | struct hardwire_ttystate state; | |
08b4f080 FN |
742 | int baud_code = rate_to_code (rate); |
743 | ||
744 | if (baud_code < 0) | |
745 | { | |
746 | /* The baud rate was not valid. | |
c378eb4e | 747 | A warning has already been issued. */ |
08b4f080 FN |
748 | errno = EINVAL; |
749 | return -1; | |
750 | } | |
c906108c | 751 | |
c5aa993b | 752 | if (get_tty_state (scb, &state)) |
c906108c SS |
753 | return -1; |
754 | ||
755 | #ifdef HAVE_TERMIOS | |
08b4f080 FN |
756 | cfsetospeed (&state.termios, baud_code); |
757 | cfsetispeed (&state.termios, baud_code); | |
c906108c SS |
758 | #endif |
759 | ||
760 | #ifdef HAVE_TERMIO | |
761 | #ifndef CIBAUD | |
762 | #define CIBAUD CBAUD | |
763 | #endif | |
764 | ||
765 | state.termio.c_cflag &= ~(CBAUD | CIBAUD); | |
08b4f080 | 766 | state.termio.c_cflag |= baud_code; |
c906108c SS |
767 | #endif |
768 | ||
769 | #ifdef HAVE_SGTTY | |
08b4f080 FN |
770 | state.sgttyb.sg_ispeed = baud_code; |
771 | state.sgttyb.sg_ospeed = baud_code; | |
c906108c SS |
772 | #endif |
773 | ||
774 | return set_tty_state (scb, &state); | |
775 | } | |
776 | ||
777 | static int | |
819cc324 | 778 | hardwire_setstopbits (struct serial *scb, int num) |
c906108c SS |
779 | { |
780 | struct hardwire_ttystate state; | |
781 | int newbit; | |
782 | ||
c5aa993b | 783 | if (get_tty_state (scb, &state)) |
c906108c SS |
784 | return -1; |
785 | ||
786 | switch (num) | |
787 | { | |
788 | case SERIAL_1_STOPBITS: | |
789 | newbit = 0; | |
790 | break; | |
791 | case SERIAL_1_AND_A_HALF_STOPBITS: | |
792 | case SERIAL_2_STOPBITS: | |
793 | newbit = 1; | |
794 | break; | |
795 | default: | |
796 | return 1; | |
797 | } | |
798 | ||
799 | #ifdef HAVE_TERMIOS | |
800 | if (!newbit) | |
801 | state.termios.c_cflag &= ~CSTOPB; | |
802 | else | |
c5aa993b | 803 | state.termios.c_cflag |= CSTOPB; /* two bits */ |
c906108c SS |
804 | #endif |
805 | ||
806 | #ifdef HAVE_TERMIO | |
807 | if (!newbit) | |
808 | state.termio.c_cflag &= ~CSTOPB; | |
809 | else | |
c5aa993b | 810 | state.termio.c_cflag |= CSTOPB; /* two bits */ |
c906108c SS |
811 | #endif |
812 | ||
813 | #ifdef HAVE_SGTTY | |
814 | return 0; /* sgtty doesn't support this */ | |
815 | #endif | |
816 | ||
817 | return set_tty_state (scb, &state); | |
818 | } | |
819 | ||
236af5e3 YG |
820 | /* Implement the "setparity" serial_ops callback. */ |
821 | ||
822 | static int | |
823 | hardwire_setparity (struct serial *scb, int parity) | |
824 | { | |
825 | struct hardwire_ttystate state; | |
826 | int newparity = 0; | |
827 | ||
828 | if (get_tty_state (scb, &state)) | |
829 | return -1; | |
830 | ||
831 | switch (parity) | |
832 | { | |
833 | case GDBPARITY_NONE: | |
834 | newparity = 0; | |
835 | break; | |
836 | case GDBPARITY_ODD: | |
837 | newparity = PARENB | PARODD; | |
838 | break; | |
839 | case GDBPARITY_EVEN: | |
840 | newparity = PARENB; | |
841 | break; | |
842 | default: | |
843 | internal_warning (__FILE__, __LINE__, | |
8a4506c0 | 844 | "Incorrect parity value: %d", parity); |
236af5e3 YG |
845 | return -1; |
846 | } | |
847 | ||
848 | #ifdef HAVE_TERMIOS | |
849 | state.termios.c_cflag &= ~(PARENB | PARODD); | |
850 | state.termios.c_cflag |= newparity; | |
851 | #endif | |
852 | ||
853 | #ifdef HAVE_TERMIO | |
854 | state.termio.c_cflag &= ~(PARENB | PARODD); | |
855 | state.termio.c_cflag |= newparity; | |
856 | #endif | |
857 | ||
858 | #ifdef HAVE_SGTTY | |
859 | return 0; /* sgtty doesn't support this */ | |
860 | #endif | |
861 | return set_tty_state (scb, &state); | |
862 | } | |
863 | ||
864 | ||
c906108c | 865 | static void |
819cc324 | 866 | hardwire_close (struct serial *scb) |
c906108c SS |
867 | { |
868 | if (scb->fd < 0) | |
869 | return; | |
870 | ||
c5aa993b | 871 | close (scb->fd); |
c906108c SS |
872 | scb->fd = -1; |
873 | } | |
c2c6d25f | 874 | \f |
2acceee2 | 875 | \f |
433759f7 | 876 | |
12e8c7d7 TT |
877 | /* The hardwire ops. */ |
878 | ||
879 | static const struct serial_ops hardwire_ops = | |
880 | { | |
881 | "hardwire", | |
882 | hardwire_open, | |
883 | hardwire_close, | |
884 | NULL, | |
b4505029 | 885 | /* FIXME: Don't replace this with the equivalent ser_base*() until |
c378eb4e MS |
886 | the old TERMIOS/SGTTY/... timer code has been flushed. cagney |
887 | 1999-09-16. */ | |
12e8c7d7 TT |
888 | hardwire_readchar, |
889 | ser_base_write, | |
890 | hardwire_flush_output, | |
891 | hardwire_flush_input, | |
892 | hardwire_send_break, | |
893 | hardwire_raw, | |
894 | hardwire_get_tty_state, | |
895 | hardwire_copy_tty_state, | |
896 | hardwire_set_tty_state, | |
897 | hardwire_print_tty_state, | |
898 | hardwire_noflush_set_tty_state, | |
899 | hardwire_setbaudrate, | |
900 | hardwire_setstopbits, | |
236af5e3 | 901 | hardwire_setparity, |
12e8c7d7 TT |
902 | hardwire_drain_output, |
903 | ser_base_async, | |
904 | ser_unix_read_prim, | |
905 | ser_unix_write_prim | |
906 | }; | |
907 | ||
908 | void | |
909 | _initialize_ser_hardwire (void) | |
910 | { | |
911 | serial_add_interface (&hardwire_ops); | |
23776285 MR |
912 | |
913 | #ifdef HAVE_TERMIOS | |
914 | #ifdef CRTSCTS | |
915 | add_setshow_boolean_cmd ("remoteflow", no_class, | |
916 | &serial_hwflow, _("\ | |
917 | Set use of hardware flow control for remote serial I/O."), _("\ | |
918 | Show use of hardware flow control for remote serial I/O."), _("\ | |
919 | Enable or disable hardware flow control (RTS/CTS) on the serial port\n\ | |
920 | when debugging using remote targets."), | |
921 | NULL, | |
922 | show_serial_hwflow, | |
923 | &setlist, &showlist); | |
924 | #endif | |
925 | #endif | |
c906108c | 926 | } |
b4505029 MM |
927 | |
928 | int | |
929 | ser_unix_read_prim (struct serial *scb, size_t count) | |
930 | { | |
75ee5925 | 931 | return read (scb->fd, scb->buf, count); |
b4505029 MM |
932 | } |
933 | ||
934 | int | |
935 | ser_unix_write_prim (struct serial *scb, const void *buf, size_t len) | |
936 | { | |
b4505029 MM |
937 | return write (scb->fd, buf, len); |
938 | } |