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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2012 Peter Stuge <peter@stuge.se> | |
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 3 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, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include <glib.h> | |
23 | #ifdef _WIN32 | |
24 | #include <winsock2.h> | |
25 | #endif | |
26 | #include <libsigrok/libsigrok.h> | |
27 | #include "libsigrok-internal.h" | |
28 | ||
29 | /** @cond PRIVATE */ | |
30 | #define LOG_PREFIX "backend" | |
31 | /** @endcond */ | |
32 | ||
33 | /** | |
34 | * @mainpage libsigrok API | |
35 | * | |
36 | * @section sec_intro Introduction | |
37 | * | |
38 | * The <a href="http://sigrok.org">sigrok</a> project aims at creating a | |
39 | * portable, cross-platform, Free/Libre/Open-Source signal analysis software | |
40 | * suite that supports various device types (such as logic analyzers, | |
41 | * oscilloscopes, multimeters, and more). | |
42 | * | |
43 | * <a href="http://sigrok.org/wiki/Libsigrok">libsigrok</a> is a shared | |
44 | * library written in C which provides the basic API for talking to | |
45 | * <a href="http://sigrok.org/wiki/Supported_hardware">supported hardware</a> | |
46 | * and reading/writing the acquired data into various | |
47 | * <a href="http://sigrok.org/wiki/Input_output_formats">input/output | |
48 | * file formats</a>. | |
49 | * | |
50 | * @section sec_api API reference | |
51 | * | |
52 | * See the "Modules" page for an introduction to various libsigrok | |
53 | * related topics and the detailed API documentation of the respective | |
54 | * functions. | |
55 | * | |
56 | * You can also browse the API documentation by file, or review all | |
57 | * data structures. | |
58 | * | |
59 | * @section sec_mailinglists Mailing lists | |
60 | * | |
61 | * There is one mailing list for sigrok/libsigrok: <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-devel">sigrok-devel</a>. | |
62 | * | |
63 | * @section sec_irc IRC | |
64 | * | |
65 | * You can find the sigrok developers in the | |
66 | * <a href="irc://chat.freenode.net/sigrok">\#sigrok</a> | |
67 | * IRC channel on Freenode. | |
68 | * | |
69 | * @section sec_website Website | |
70 | * | |
71 | * <a href="http://sigrok.org/wiki/Libsigrok">sigrok.org/wiki/Libsigrok</a> | |
72 | */ | |
73 | ||
74 | /** | |
75 | * @file | |
76 | * | |
77 | * Initializing and shutting down libsigrok. | |
78 | */ | |
79 | ||
80 | /** | |
81 | * @defgroup grp_init Initialization | |
82 | * | |
83 | * Initializing and shutting down libsigrok. | |
84 | * | |
85 | * Before using any of the libsigrok functionality (except for | |
86 | * sr_log_loglevel_set()), sr_init() must be called to initialize the | |
87 | * library, which will return a struct sr_context when the initialization | |
88 | * was successful. | |
89 | * | |
90 | * When libsigrok functionality is no longer needed, sr_exit() should be | |
91 | * called, which will (among other things) free the struct sr_context. | |
92 | * | |
93 | * Example for a minimal program using libsigrok: | |
94 | * | |
95 | * @code{.c} | |
96 | * #include <stdio.h> | |
97 | * #include <libsigrok/libsigrok.h> | |
98 | * | |
99 | * int main(int argc, char **argv) | |
100 | * { | |
101 | * int ret; | |
102 | * struct sr_context *sr_ctx; | |
103 | * | |
104 | * if ((ret = sr_init(&sr_ctx)) != SR_OK) { | |
105 | * printf("Error initializing libsigrok (%s): %s.\n", | |
106 | * sr_strerror_name(ret), sr_strerror(ret)); | |
107 | * return 1; | |
108 | * } | |
109 | * | |
110 | * // Use libsigrok functions here... | |
111 | * | |
112 | * if ((ret = sr_exit(sr_ctx)) != SR_OK) { | |
113 | * printf("Error shutting down libsigrok (%s): %s.\n", | |
114 | * sr_strerror_name(ret), sr_strerror(ret)); | |
115 | * return 1; | |
116 | * } | |
117 | * | |
118 | * return 0; | |
119 | * } | |
120 | * @endcode | |
121 | * | |
122 | * @{ | |
123 | */ | |
124 | ||
125 | static void print_versions(void) | |
126 | { | |
127 | GString *s; | |
128 | #if defined(HAVE_LIBUSB_1_0) && !defined(__FreeBSD__) | |
129 | const struct libusb_version *lv; | |
130 | #endif | |
131 | ||
132 | s = g_string_sized_new(200); | |
133 | ||
134 | sr_dbg("libsigrok %s/%s (rt: %s/%s).", | |
135 | SR_PACKAGE_VERSION_STRING, SR_LIB_VERSION_STRING, | |
136 | sr_package_version_string_get(), sr_lib_version_string_get()); | |
137 | ||
138 | g_string_append(s, "Libs: "); | |
139 | g_string_append_printf(s, "glib %d.%d.%d (rt: %d.%d.%d/%d:%d), ", | |
140 | GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION, | |
141 | glib_major_version, glib_minor_version, glib_micro_version, | |
142 | glib_binary_age, glib_interface_age); | |
143 | g_string_append_printf(s, "libzip %s, ", CONF_LIBZIP_VERSION); | |
144 | #ifdef HAVE_LIBSERIALPORT | |
145 | g_string_append_printf(s, "libserialport %s/%s (rt: %s/%s), ", | |
146 | SP_PACKAGE_VERSION_STRING, SP_LIB_VERSION_STRING, | |
147 | sp_get_package_version_string(), sp_get_lib_version_string()); | |
148 | #endif | |
149 | #ifdef HAVE_LIBUSB_1_0 | |
150 | #ifdef __FreeBSD__ | |
151 | g_string_append_printf(s, "libusb-1.0 %s, ", CONF_LIBUSB_1_0_VERSION); | |
152 | #else | |
153 | lv = libusb_get_version(); | |
154 | g_string_append_printf(s, "libusb-1.0 %d.%d.%d.%d%s, ", | |
155 | lv->major, lv->minor, lv->micro, lv->nano, lv->rc); | |
156 | #endif | |
157 | #endif | |
158 | #ifdef HAVE_LIBFTDI | |
159 | g_string_append_printf(s, "libftdi %s, ", CONF_LIBFTDI_VERSION); | |
160 | #endif | |
161 | #ifdef HAVE_LIBGPIB | |
162 | g_string_append_printf(s, "libgpib %s, ", CONF_LIBGPIB_VERSION); | |
163 | #endif | |
164 | #ifdef HAVE_LIBREVISA | |
165 | g_string_append_printf(s, "librevisa %s, ", CONF_LIBREVISA_VERSION); | |
166 | #endif | |
167 | s->str[s->len - 2] = '.'; | |
168 | s->str[s->len - 1] = '\0'; | |
169 | sr_dbg("%s", s->str); | |
170 | ||
171 | s = g_string_truncate(s, 0); | |
172 | g_string_append_printf(s, "Host: %s, ", CONF_HOST); | |
173 | #ifdef WORDS_BIGENDIAN | |
174 | g_string_append_printf(s, "big-endian."); | |
175 | #else | |
176 | g_string_append_printf(s, "little-endian."); | |
177 | #endif | |
178 | sr_dbg("%s", s->str); | |
179 | ||
180 | s = g_string_truncate(s, 0); | |
181 | g_string_append_printf(s, "SCPI backends: "); | |
182 | ||
183 | g_string_append_printf(s, "TCP, "); | |
184 | #if HAVE_RPC | |
185 | g_string_append_printf(s, "RPC, "); | |
186 | #endif | |
187 | #ifdef HAVE_LIBSERIALPORT | |
188 | g_string_append_printf(s, "serial, "); | |
189 | #endif | |
190 | #ifdef HAVE_LIBREVISA | |
191 | g_string_append_printf(s, "VISA, "); | |
192 | #endif | |
193 | #ifdef HAVE_LIBGPIB | |
194 | g_string_append_printf(s, "GPIB, "); | |
195 | #endif | |
196 | #ifdef HAVE_LIBUSB_1_0 | |
197 | g_string_append_printf(s, "USBTMC, "); | |
198 | #endif | |
199 | s->str[s->len - 2] = '.'; | |
200 | s->str[s->len - 1] = '\0'; | |
201 | sr_dbg("%s", s->str); | |
202 | ||
203 | g_string_free(s, TRUE); | |
204 | } | |
205 | ||
206 | /** | |
207 | * Sanity-check all libsigrok drivers. | |
208 | * | |
209 | * @param[in] ctx Pointer to a libsigrok context struct. Must not be NULL. | |
210 | * | |
211 | * @retval SR_OK All drivers are OK | |
212 | * @retval SR_ERR One or more drivers have issues. | |
213 | * @retval SR_ERR_ARG Invalid argument. | |
214 | */ | |
215 | static int sanity_check_all_drivers(const struct sr_context *ctx) | |
216 | { | |
217 | int i, errors, ret = SR_OK; | |
218 | struct sr_dev_driver **drivers; | |
219 | const char *d; | |
220 | ||
221 | if (!ctx) | |
222 | return SR_ERR_ARG; | |
223 | ||
224 | sr_spew("Sanity-checking all drivers."); | |
225 | ||
226 | drivers = sr_driver_list(ctx); | |
227 | for (i = 0; drivers[i]; i++) { | |
228 | errors = 0; | |
229 | ||
230 | d = (drivers[i]->name) ? drivers[i]->name : "NULL"; | |
231 | ||
232 | if (!drivers[i]->name) { | |
233 | sr_err("No name in driver %d ('%s').", i, d); | |
234 | errors++; | |
235 | } | |
236 | if (!drivers[i]->longname) { | |
237 | sr_err("No longname in driver %d ('%s').", i, d); | |
238 | errors++; | |
239 | } | |
240 | if (drivers[i]->api_version < 1) { | |
241 | sr_err("API version in driver %d ('%s') < 1.", i, d); | |
242 | errors++; | |
243 | } | |
244 | if (!drivers[i]->init) { | |
245 | sr_err("No init in driver %d ('%s').", i, d); | |
246 | errors++; | |
247 | } | |
248 | if (!drivers[i]->cleanup) { | |
249 | sr_err("No cleanup in driver %d ('%s').", i, d); | |
250 | errors++; | |
251 | } | |
252 | if (!drivers[i]->scan) { | |
253 | sr_err("No scan in driver %d ('%s').", i, d); | |
254 | errors++; | |
255 | } | |
256 | if (!drivers[i]->dev_list) { | |
257 | sr_err("No dev_list in driver %d ('%s').", i, d); | |
258 | errors++; | |
259 | } | |
260 | /* Note: config_get() is optional. */ | |
261 | if (!drivers[i]->config_set) { | |
262 | sr_err("No config_set in driver %d ('%s').", i, d); | |
263 | errors++; | |
264 | } | |
265 | if (!drivers[i]->config_list) { | |
266 | sr_err("No config_list in driver %d ('%s').", i, d); | |
267 | errors++; | |
268 | } | |
269 | if (!drivers[i]->dev_open) { | |
270 | sr_err("No dev_open in driver %d ('%s').", i, d); | |
271 | errors++; | |
272 | } | |
273 | if (!drivers[i]->dev_close) { | |
274 | sr_err("No dev_close in driver %d ('%s').", i, d); | |
275 | errors++; | |
276 | } | |
277 | if (!drivers[i]->dev_acquisition_start) { | |
278 | sr_err("No dev_acquisition_start in driver %d ('%s').", | |
279 | i, d); | |
280 | errors++; | |
281 | } | |
282 | if (!drivers[i]->dev_acquisition_stop) { | |
283 | sr_err("No dev_acquisition_stop in driver %d ('%s').", | |
284 | i, d); | |
285 | errors++; | |
286 | } | |
287 | ||
288 | /* Note: 'priv' is allowed to be NULL. */ | |
289 | ||
290 | if (errors == 0) | |
291 | continue; | |
292 | ||
293 | ret = SR_ERR; | |
294 | } | |
295 | ||
296 | return ret; | |
297 | } | |
298 | ||
299 | /** | |
300 | * Sanity-check all libsigrok input modules. | |
301 | * | |
302 | * @retval SR_OK All modules are OK | |
303 | * @retval SR_ERR One or more modules have issues. | |
304 | */ | |
305 | static int sanity_check_all_input_modules(void) | |
306 | { | |
307 | int i, errors, ret = SR_OK; | |
308 | const struct sr_input_module **inputs; | |
309 | const char *d; | |
310 | ||
311 | sr_spew("Sanity-checking all input modules."); | |
312 | ||
313 | inputs = sr_input_list(); | |
314 | for (i = 0; inputs[i]; i++) { | |
315 | errors = 0; | |
316 | ||
317 | d = (inputs[i]->id) ? inputs[i]->id : "NULL"; | |
318 | ||
319 | if (!inputs[i]->id) { | |
320 | sr_err("No ID in module %d ('%s').", i, d); | |
321 | errors++; | |
322 | } | |
323 | if (!inputs[i]->name) { | |
324 | sr_err("No name in module %d ('%s').", i, d); | |
325 | errors++; | |
326 | } | |
327 | if (!inputs[i]->desc) { | |
328 | sr_err("No description in module %d ('%s').", i, d); | |
329 | errors++; | |
330 | } | |
331 | if (!inputs[i]->init) { | |
332 | sr_err("No init in module %d ('%s').", i, d); | |
333 | errors++; | |
334 | } | |
335 | if (!inputs[i]->receive) { | |
336 | sr_err("No receive in module %d ('%s').", i, d); | |
337 | errors++; | |
338 | } | |
339 | if (!inputs[i]->end) { | |
340 | sr_err("No end in module %d ('%s').", i, d); | |
341 | errors++; | |
342 | } | |
343 | ||
344 | if (errors == 0) | |
345 | continue; | |
346 | ||
347 | ret = SR_ERR; | |
348 | } | |
349 | ||
350 | return ret; | |
351 | } | |
352 | ||
353 | /** | |
354 | * Sanity-check all libsigrok output modules. | |
355 | * | |
356 | * @retval SR_OK All modules are OK | |
357 | * @retval SR_ERR One or more modules have issues. | |
358 | */ | |
359 | static int sanity_check_all_output_modules(void) | |
360 | { | |
361 | int i, errors, ret = SR_OK; | |
362 | const struct sr_output_module **outputs; | |
363 | const char *d; | |
364 | ||
365 | sr_spew("Sanity-checking all output modules."); | |
366 | ||
367 | outputs = sr_output_list(); | |
368 | for (i = 0; outputs[i]; i++) { | |
369 | errors = 0; | |
370 | ||
371 | d = (outputs[i]->id) ? outputs[i]->id : "NULL"; | |
372 | ||
373 | if (!outputs[i]->id) { | |
374 | sr_err("No ID in module %d ('%s').", i, d); | |
375 | errors++; | |
376 | } | |
377 | if (!outputs[i]->name) { | |
378 | sr_err("No name in module %d ('%s').", i, d); | |
379 | errors++; | |
380 | } | |
381 | if (!outputs[i]->desc) { | |
382 | sr_err("No description in module '%s'.", d); | |
383 | errors++; | |
384 | } | |
385 | if (!outputs[i]->receive) { | |
386 | sr_err("No receive in module '%s'.", d); | |
387 | errors++; | |
388 | } | |
389 | ||
390 | if (errors == 0) | |
391 | continue; | |
392 | ||
393 | ret = SR_ERR; | |
394 | } | |
395 | ||
396 | return ret; | |
397 | } | |
398 | ||
399 | /** | |
400 | * Sanity-check all libsigrok transform modules. | |
401 | * | |
402 | * @retval SR_OK All modules are OK | |
403 | * @retval SR_ERR One or more modules have issues. | |
404 | */ | |
405 | static int sanity_check_all_transform_modules(void) | |
406 | { | |
407 | int i, errors, ret = SR_OK; | |
408 | const struct sr_transform_module **transforms; | |
409 | const char *d; | |
410 | ||
411 | sr_spew("Sanity-checking all transform modules."); | |
412 | ||
413 | transforms = sr_transform_list(); | |
414 | for (i = 0; transforms[i]; i++) { | |
415 | errors = 0; | |
416 | ||
417 | d = (transforms[i]->id) ? transforms[i]->id : "NULL"; | |
418 | ||
419 | if (!transforms[i]->id) { | |
420 | sr_err("No ID in module %d ('%s').", i, d); | |
421 | errors++; | |
422 | } | |
423 | if (!transforms[i]->name) { | |
424 | sr_err("No name in module %d ('%s').", i, d); | |
425 | errors++; | |
426 | } | |
427 | if (!transforms[i]->desc) { | |
428 | sr_err("No description in module '%s'.", d); | |
429 | errors++; | |
430 | } | |
431 | /* Note: options() is optional. */ | |
432 | /* Note: init() is optional. */ | |
433 | if (!transforms[i]->receive) { | |
434 | sr_err("No receive in module '%s'.", d); | |
435 | errors++; | |
436 | } | |
437 | /* Note: cleanup() is optional. */ | |
438 | ||
439 | if (errors == 0) | |
440 | continue; | |
441 | ||
442 | ret = SR_ERR; | |
443 | } | |
444 | ||
445 | return ret; | |
446 | } | |
447 | ||
448 | /** | |
449 | * Initialize libsigrok. | |
450 | * | |
451 | * This function must be called before any other libsigrok function. | |
452 | * | |
453 | * @param ctx Pointer to a libsigrok context struct pointer. Must not be NULL. | |
454 | * This will be a pointer to a newly allocated libsigrok context | |
455 | * object upon success, and is undefined upon errors. | |
456 | * | |
457 | * @return SR_OK upon success, a (negative) error code otherwise. Upon errors | |
458 | * the 'ctx' pointer is undefined and should not be used. Upon success, | |
459 | * the context will be free'd by sr_exit() as part of the libsigrok | |
460 | * shutdown. | |
461 | * | |
462 | * @since 0.2.0 | |
463 | */ | |
464 | SR_API int sr_init(struct sr_context **ctx) | |
465 | { | |
466 | int ret = SR_ERR; | |
467 | struct sr_context *context; | |
468 | struct sr_dev_driver ***lists, **drivers; | |
469 | GArray *array; | |
470 | #ifdef _WIN32 | |
471 | WSADATA wsadata; | |
472 | #endif | |
473 | ||
474 | print_versions(); | |
475 | ||
476 | if (!ctx) { | |
477 | sr_err("%s(): libsigrok context was NULL.", __func__); | |
478 | return SR_ERR; | |
479 | } | |
480 | ||
481 | context = g_malloc0(sizeof(struct sr_context)); | |
482 | ||
483 | /* Generate ctx->driver_list at runtime. */ | |
484 | array = g_array_new(TRUE, FALSE, sizeof(struct sr_dev_driver *)); | |
485 | for (lists = drivers_lists; *lists; lists++) | |
486 | for (drivers = *lists; *drivers; drivers++) | |
487 | g_array_append_val(array, *drivers); | |
488 | context->driver_list = (struct sr_dev_driver **)array->data; | |
489 | g_array_free(array, FALSE); | |
490 | ||
491 | if (sanity_check_all_drivers(context) < 0) { | |
492 | sr_err("Internal driver error(s), aborting."); | |
493 | return ret; | |
494 | } | |
495 | ||
496 | if (sanity_check_all_input_modules() < 0) { | |
497 | sr_err("Internal input module error(s), aborting."); | |
498 | return ret; | |
499 | } | |
500 | ||
501 | if (sanity_check_all_output_modules() < 0) { | |
502 | sr_err("Internal output module error(s), aborting."); | |
503 | return ret; | |
504 | } | |
505 | ||
506 | if (sanity_check_all_transform_modules() < 0) { | |
507 | sr_err("Internal transform module error(s), aborting."); | |
508 | return ret; | |
509 | } | |
510 | ||
511 | #ifdef _WIN32 | |
512 | if ((ret = WSAStartup(MAKEWORD(2, 2), &wsadata)) != 0) { | |
513 | sr_err("WSAStartup failed with error code %d.", ret); | |
514 | ret = SR_ERR; | |
515 | goto done; | |
516 | } | |
517 | #endif | |
518 | ||
519 | #ifdef HAVE_LIBUSB_1_0 | |
520 | ret = libusb_init(&context->libusb_ctx); | |
521 | if (LIBUSB_SUCCESS != ret) { | |
522 | sr_err("libusb_init() returned %s.", libusb_error_name(ret)); | |
523 | ret = SR_ERR; | |
524 | goto done; | |
525 | } | |
526 | #endif | |
527 | sr_resource_set_hooks(context, NULL, NULL, NULL, NULL); | |
528 | ||
529 | *ctx = context; | |
530 | context = NULL; | |
531 | ret = SR_OK; | |
532 | ||
533 | #if defined(HAVE_LIBUSB_1_0) || defined(_WIN32) | |
534 | done: | |
535 | #endif | |
536 | g_free(context); | |
537 | return ret; | |
538 | } | |
539 | ||
540 | /** | |
541 | * Shutdown libsigrok. | |
542 | * | |
543 | * @param ctx Pointer to a libsigrok context struct. Must not be NULL. | |
544 | * | |
545 | * @retval SR_OK Success | |
546 | * @retval other Error code SR_ERR, ... | |
547 | * | |
548 | * @since 0.2.0 | |
549 | */ | |
550 | SR_API int sr_exit(struct sr_context *ctx) | |
551 | { | |
552 | if (!ctx) { | |
553 | sr_err("%s(): libsigrok context was NULL.", __func__); | |
554 | return SR_ERR; | |
555 | } | |
556 | ||
557 | sr_hw_cleanup_all(ctx); | |
558 | ||
559 | #ifdef _WIN32 | |
560 | WSACleanup(); | |
561 | #endif | |
562 | ||
563 | #ifdef HAVE_LIBUSB_1_0 | |
564 | libusb_exit(ctx->libusb_ctx); | |
565 | #endif | |
566 | ||
567 | g_free(sr_driver_list(ctx)); | |
568 | g_free(ctx); | |
569 | ||
570 | return SR_OK; | |
571 | } | |
572 | ||
573 | /** @} */ |