Commit | Line | Data |
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4e772f44 SG |
1 | /* Serial interface for local (hardwired) serial ports on Un*x like systems |
2 | Copyright 1992, 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "serial.h" | |
22 | #include <fcntl.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/time.h> | |
25 | ||
26 | #if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY) | |
27 | #define HAVE_SGTTY | |
28 | #endif | |
29 | ||
30 | #ifdef HAVE_TERMIOS | |
31 | #include <termios.h> | |
32 | #include <unistd.h> | |
38dc5e12 SG |
33 | |
34 | struct hardwire_ttystate | |
35 | { | |
36 | struct termios termios; | |
37 | }; | |
4e772f44 | 38 | #endif |
38dc5e12 | 39 | |
4e772f44 | 40 | #ifdef HAVE_TERMIO |
ebd99d54 | 41 | #include <termio.h> |
38dc5e12 SG |
42 | |
43 | struct hardwire_ttystate | |
44 | { | |
45 | struct termio termio; | |
46 | }; | |
4e772f44 | 47 | #endif |
38dc5e12 | 48 | |
4e772f44 SG |
49 | #ifdef HAVE_SGTTY |
50 | #include <sgtty.h> | |
38dc5e12 SG |
51 | |
52 | struct hardwire_ttystate | |
53 | { | |
54 | struct sgttyb sgttyb; | |
55 | }; | |
4e772f44 SG |
56 | #endif |
57 | ||
9775789d SG |
58 | static int hardwire_open PARAMS ((serial_t scb, const char *name)); |
59 | static void hardwire_raw PARAMS ((serial_t scb)); | |
60 | static int wait_for PARAMS ((serial_t scb, int timeout)); | |
61 | static int hardwire_readchar PARAMS ((serial_t scb, int timeout)); | |
62 | static int rate_to_code PARAMS ((int rate)); | |
63 | static int hardwire_setbaudrate PARAMS ((serial_t scb, int rate)); | |
64 | static int hardwire_write PARAMS ((serial_t scb, const char *str, int len)); | |
65 | static void hardwire_restore PARAMS ((serial_t scb)); | |
66 | static void hardwire_close PARAMS ((serial_t scb)); | |
38dc5e12 SG |
67 | static int get_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state)); |
68 | static int set_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state)); | |
69 | static serial_ttystate hardwire_get_tty_state PARAMS ((serial_t scb)); | |
70 | static int hardwire_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); | |
9775789d | 71 | |
4e772f44 SG |
72 | /* Open up a real live device for serial I/O */ |
73 | ||
74 | static int | |
75 | hardwire_open(scb, name) | |
76 | serial_t scb; | |
77 | const char *name; | |
78 | { | |
79 | scb->fd = open (name, O_RDWR); | |
80 | if (scb->fd < 0) | |
4febd102 | 81 | return -1; |
4e772f44 SG |
82 | |
83 | return 0; | |
84 | } | |
85 | ||
38dc5e12 SG |
86 | static int |
87 | get_tty_state(scb, state) | |
4e772f44 | 88 | serial_t scb; |
38dc5e12 | 89 | struct hardwire_ttystate *state; |
4e772f44 SG |
90 | { |
91 | #ifdef HAVE_TERMIOS | |
38dc5e12 SG |
92 | return tcgetattr(scb->fd, &state->termios); |
93 | #endif | |
4e772f44 | 94 | |
38dc5e12 SG |
95 | #ifdef HAVE_TERMIO |
96 | return ioctl (scb->fd, TCGETA, &state->termio); | |
97 | #endif | |
4e772f44 | 98 | |
38dc5e12 SG |
99 | #ifdef HAVE_SGTTY |
100 | return ioctl (scb->fd, TIOCGETP, &state->sgttyb); | |
101 | #endif | |
102 | } | |
4e772f44 | 103 | |
38dc5e12 SG |
104 | static int |
105 | set_tty_state(scb, state) | |
106 | serial_t scb; | |
107 | struct hardwire_ttystate *state; | |
108 | { | |
109 | int err; | |
110 | ||
111 | #ifdef HAVE_TERMIOS | |
112 | return tcsetattr(scb->fd, TCSANOW, &state->termios); | |
4e772f44 SG |
113 | #endif |
114 | ||
115 | #ifdef HAVE_TERMIO | |
38dc5e12 SG |
116 | return ioctl (scb->fd, TCSETA, &state->termio); |
117 | #endif | |
4e772f44 | 118 | |
38dc5e12 SG |
119 | #ifdef HAVE_SGTTY |
120 | return ioctl (scb->fd, TIOCSETP, &state->sgttyb); | |
121 | #endif | |
122 | } | |
4e772f44 | 123 | |
38dc5e12 SG |
124 | static serial_ttystate |
125 | hardwire_get_tty_state(scb) | |
126 | serial_t scb; | |
127 | { | |
128 | struct hardwire_ttystate *state; | |
4e772f44 | 129 | |
38dc5e12 | 130 | state = (struct hardwire_ttystate *)xmalloc(sizeof *state); |
4e772f44 | 131 | |
38dc5e12 SG |
132 | if (get_tty_state(scb, state)) |
133 | return NULL; | |
4e772f44 | 134 | |
38dc5e12 SG |
135 | return (serial_ttystate)state; |
136 | } | |
4e772f44 | 137 | |
38dc5e12 SG |
138 | static int |
139 | hardwire_set_tty_state(scb, ttystate) | |
140 | serial_t scb; | |
141 | serial_ttystate ttystate; | |
142 | { | |
143 | struct hardwire_ttystate *state; | |
4e772f44 | 144 | |
38dc5e12 SG |
145 | state = (struct hardwire_ttystate *)ttystate; |
146 | ||
147 | return set_tty_state(scb, state); | |
148 | } | |
149 | ||
150 | static void | |
151 | hardwire_raw(scb) | |
152 | serial_t scb; | |
153 | { | |
154 | struct hardwire_ttystate state; | |
155 | ||
156 | if (get_tty_state(scb, &state)) | |
157 | fprintf(stderr, "get_tty_state failed: %s\n", safe_strerror(errno)); | |
158 | ||
159 | #ifdef HAVE_TERMIOS | |
160 | state.termios.c_iflag = 0; | |
161 | state.termios.c_oflag = 0; | |
162 | state.termios.c_lflag = 0; | |
163 | state.termios.c_cflag &= ~(CSIZE|PARENB); | |
164 | state.termios.c_cflag |= CS8; | |
165 | state.termios.c_cc[VMIN] = 0; | |
166 | state.termios.c_cc[VTIME] = 0; | |
167 | #endif | |
168 | ||
169 | #ifdef HAVE_TERMIO | |
170 | state.termio.c_iflag = 0; | |
171 | state.termio.c_oflag = 0; | |
172 | state.termio.c_lflag = 0; | |
173 | state.termio.c_cflag &= ~(CSIZE|PARENB); | |
174 | state.termio.c_cflag |= CS8; | |
175 | state.termio.c_cc[VMIN] = 0; | |
176 | state.termio.c_cc[VTIME] = 0; | |
177 | #endif | |
178 | ||
179 | #ifdef HAVE_SGTTY | |
180 | state.sgttyb.sg_flags |= RAW | ANYP; | |
181 | state.sgttyb.sg_flags &= ~(CBREAK | ECHO); | |
4e772f44 | 182 | #endif |
9e15da4a SG |
183 | |
184 | scb->current_timeout = 0; | |
38dc5e12 SG |
185 | |
186 | if (set_tty_state (scb, &state)) | |
187 | fprintf(stderr, "set_tty_state failed: %s\n", safe_strerror(errno)); | |
4e772f44 SG |
188 | } |
189 | ||
9e15da4a SG |
190 | /* Wait for input on scb, with timeout seconds. Returns 0 on success, |
191 | otherwise SERIAL_TIMEOUT or SERIAL_ERROR. | |
192 | ||
193 | For termio{s}, we actually just setup VTIME if necessary, and let the | |
194 | timeout occur in the read() in hardwire_read(). | |
195 | */ | |
4e772f44 SG |
196 | |
197 | static int | |
9775789d | 198 | wait_for(scb, timeout) |
4e772f44 SG |
199 | serial_t scb; |
200 | int timeout; | |
201 | { | |
9775789d | 202 | int numfds; |
4e772f44 | 203 | |
9775789d SG |
204 | #ifdef HAVE_SGTTY |
205 | struct timeval tv; | |
206 | fd_set readfds; | |
eca29634 | 207 | |
9775789d | 208 | FD_ZERO (&readfds); |
eca29634 | 209 | |
9775789d SG |
210 | tv.tv_sec = timeout; |
211 | tv.tv_usec = 0; | |
eca29634 | 212 | |
9775789d | 213 | FD_SET(scb->fd, &readfds); |
eca29634 | 214 | |
a037b21e SG |
215 | while (1) |
216 | { | |
217 | if (timeout >= 0) | |
218 | numfds = select(scb->fd+1, &readfds, 0, 0, &tv); | |
219 | else | |
220 | numfds = select(scb->fd+1, &readfds, 0, 0, 0); | |
221 | ||
222 | if (numfds <= 0) | |
223 | if (numfds == 0) | |
224 | return SERIAL_TIMEOUT; | |
225 | else if (errno == EINTR) | |
226 | continue; | |
227 | else | |
228 | return SERIAL_ERROR; /* Got an error from select or poll */ | |
229 | ||
230 | return 0; | |
231 | } | |
9e15da4a | 232 | |
9775789d | 233 | #endif /* HAVE_SGTTY */ |
4e772f44 | 234 | |
9775789d | 235 | #if defined HAVE_TERMIO || defined HAVE_TERMIOS |
9e15da4a SG |
236 | if (timeout == scb->current_timeout) |
237 | return 0; | |
4e772f44 | 238 | |
9e15da4a | 239 | { |
38dc5e12 | 240 | struct hardwire_ttystate state; |
eca29634 | 241 | |
38dc5e12 SG |
242 | if (get_tty_state(scb, &state)) |
243 | fprintf(stderr, "get_tty_state failed: %s\n", safe_strerror(errno)); | |
eca29634 | 244 | |
38dc5e12 SG |
245 | #ifdef HAVE_TERMIOS |
246 | state.termios.c_cc[VTIME] = timeout * 10; | |
247 | #endif | |
9775789d | 248 | |
9e15da4a | 249 | #ifdef HAVE_TERMIO |
38dc5e12 SG |
250 | state.termio.c_cc[VTIME] = timeout * 10; |
251 | #endif | |
9e15da4a | 252 | |
38dc5e12 | 253 | scb->current_timeout = timeout; |
9e15da4a | 254 | |
38dc5e12 SG |
255 | if (set_tty_state (scb, &state)) |
256 | fprintf(stderr, "set_tty_state failed: %s\n", safe_strerror(errno)); | |
9e15da4a | 257 | |
9e15da4a SG |
258 | return 0; |
259 | } | |
260 | #endif /* HAVE_TERMIO || HAVE_TERMIOS */ | |
9775789d SG |
261 | } |
262 | ||
263 | /* Read a character with user-specified timeout. TIMEOUT is number of seconds | |
264 | to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns | |
265 | char if successful. Returns -2 if timeout expired, EOF if line dropped | |
266 | dead, or -3 for any other error (see errno in that case). */ | |
267 | ||
268 | static int | |
269 | hardwire_readchar(scb, timeout) | |
270 | serial_t scb; | |
271 | int timeout; | |
272 | { | |
273 | int status; | |
274 | ||
275 | if (scb->bufcnt-- > 0) | |
276 | return *scb->bufp++; | |
277 | ||
278 | status = wait_for(scb, timeout); | |
279 | ||
280 | if (status < 0) | |
281 | return status; | |
4e772f44 | 282 | |
9775789d | 283 | scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ); |
4e772f44 SG |
284 | |
285 | if (scb->bufcnt <= 0) | |
286 | if (scb->bufcnt == 0) | |
9e15da4a SG |
287 | return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to |
288 | distinguish between EOF & timeouts | |
289 | someday] */ | |
4e772f44 | 290 | else |
4febd102 | 291 | return SERIAL_ERROR; /* Got an error from read */ |
4e772f44 SG |
292 | |
293 | scb->bufcnt--; | |
294 | scb->bufp = scb->buf; | |
295 | return *scb->bufp++; | |
296 | } | |
297 | ||
298 | #ifndef B19200 | |
299 | #define B19200 EXTA | |
300 | #endif | |
301 | ||
302 | #ifndef B38400 | |
303 | #define B38400 EXTB | |
304 | #endif | |
305 | ||
306 | /* Translate baud rates from integers to damn B_codes. Unix should | |
307 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ | |
308 | ||
309 | static struct | |
310 | { | |
311 | int rate; | |
312 | int code; | |
313 | } | |
314 | baudtab[] = | |
315 | { | |
316 | {50, B50}, | |
317 | {75, B75}, | |
318 | {110, B110}, | |
319 | {134, B134}, | |
320 | {150, B150}, | |
321 | {200, B200}, | |
322 | {300, B300}, | |
323 | {600, B600}, | |
324 | {1200, B1200}, | |
325 | {1800, B1800}, | |
326 | {2400, B2400}, | |
327 | {4800, B4800}, | |
328 | {9600, B9600}, | |
329 | {19200, B19200}, | |
330 | {38400, B38400}, | |
331 | {-1, -1}, | |
332 | }; | |
333 | ||
334 | static int | |
335 | rate_to_code(rate) | |
336 | int rate; | |
337 | { | |
338 | int i; | |
339 | ||
340 | for (i = 0; baudtab[i].rate != -1; i++) | |
341 | if (rate == baudtab[i].rate) | |
342 | return baudtab[i].code; | |
343 | ||
344 | return -1; | |
345 | } | |
346 | ||
347 | static int | |
348 | hardwire_setbaudrate(scb, rate) | |
349 | serial_t scb; | |
350 | int rate; | |
351 | { | |
38dc5e12 | 352 | struct hardwire_ttystate state; |
4e772f44 | 353 | |
38dc5e12 | 354 | if (get_tty_state(scb, &state)) |
4febd102 | 355 | return -1; |
4e772f44 | 356 | |
38dc5e12 SG |
357 | #ifdef HAVE_TERMIOS |
358 | cfsetospeed (&state.termios, rate_to_code (rate)); | |
359 | cfsetispeed (&state.termios, rate_to_code (rate)); | |
4e772f44 SG |
360 | #endif |
361 | ||
362 | #ifdef HAVE_TERMIO | |
4e772f44 SG |
363 | #ifndef CIBAUD |
364 | #define CIBAUD CBAUD | |
365 | #endif | |
366 | ||
38dc5e12 SG |
367 | state.termio.c_cflag &= ~(CBAUD | CIBAUD); |
368 | state.termio.c_cflag |= rate_to_code (rate); | |
4e772f44 SG |
369 | #endif |
370 | ||
371 | #ifdef HAVE_SGTTY | |
38dc5e12 SG |
372 | state.sgttyb.sg_ispeed = rate_to_code (rate); |
373 | state.sgttyb.sg_ospeed = rate_to_code (rate); | |
4e772f44 | 374 | #endif |
38dc5e12 SG |
375 | |
376 | return set_tty_state (scb, &state); | |
4e772f44 SG |
377 | } |
378 | ||
379 | static int | |
380 | hardwire_write(scb, str, len) | |
381 | serial_t scb; | |
382 | const char *str; | |
383 | int len; | |
384 | { | |
385 | int cc; | |
386 | ||
387 | while (len > 0) | |
388 | { | |
389 | cc = write(scb->fd, str, len); | |
390 | ||
391 | if (cc < 0) | |
392 | return 1; | |
393 | len -= cc; | |
394 | str += cc; | |
395 | } | |
396 | return 0; | |
397 | } | |
398 | ||
4e772f44 SG |
399 | static void |
400 | hardwire_close(scb) | |
401 | serial_t scb; | |
402 | { | |
403 | if (scb->fd < 0) | |
404 | return; | |
405 | ||
4e772f44 SG |
406 | close(scb->fd); |
407 | scb->fd = -1; | |
408 | } | |
409 | ||
410 | static struct serial_ops hardwire_ops = | |
411 | { | |
412 | "hardwire", | |
413 | 0, | |
414 | hardwire_open, | |
415 | hardwire_close, | |
416 | hardwire_readchar, | |
417 | hardwire_write, | |
418 | hardwire_raw, | |
38dc5e12 SG |
419 | hardwire_get_tty_state, |
420 | hardwire_set_tty_state, | |
421 | hardwire_setbaudrate, | |
4e772f44 SG |
422 | }; |
423 | ||
9775789d | 424 | void |
4e772f44 SG |
425 | _initialize_ser_hardwire () |
426 | { | |
427 | serial_add_interface (&hardwire_ops); | |
428 | } |