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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
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 3 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, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include <stdio.h> | |
22 | #include <glib.h> | |
23 | #include <libsigrok/libsigrok.h> | |
24 | #include "libsigrok-internal.h" | |
25 | ||
26 | /** @cond PRIVATE */ | |
27 | #define LOG_PREFIX "device" | |
28 | /** @endcond */ | |
29 | ||
30 | /** | |
31 | * @file | |
32 | * | |
33 | * Device handling in libsigrok. | |
34 | */ | |
35 | ||
36 | /** | |
37 | * @defgroup grp_devices Devices | |
38 | * | |
39 | * Device handling in libsigrok. | |
40 | * | |
41 | * @{ | |
42 | */ | |
43 | ||
44 | /** @private | |
45 | * Allocate and initialize new struct sr_channel and add to sdi. | |
46 | * @param[in] sdi The device instance the channel is connected to. | |
47 | * @param[in] index @copydoc sr_channel::index | |
48 | * @param[in] type @copydoc sr_channel::type | |
49 | * @param[in] enabled @copydoc sr_channel::enabled | |
50 | * @param[in] name @copydoc sr_channel::name | |
51 | * | |
52 | * @return A new struct sr_channel*. | |
53 | */ | |
54 | SR_PRIV struct sr_channel *sr_channel_new(struct sr_dev_inst *sdi, | |
55 | int index, int type, gboolean enabled, const char *name) | |
56 | { | |
57 | struct sr_channel *ch; | |
58 | ||
59 | ch = g_malloc0(sizeof(struct sr_channel)); | |
60 | ch->sdi = sdi; | |
61 | ch->index = index; | |
62 | ch->type = type; | |
63 | ch->enabled = enabled; | |
64 | if (name) | |
65 | ch->name = g_strdup(name); | |
66 | ||
67 | sdi->channels = g_slist_append(sdi->channels, ch); | |
68 | ||
69 | return ch; | |
70 | } | |
71 | ||
72 | /** | |
73 | * Set the name of the specified channel. | |
74 | * | |
75 | * If the channel already has a different name assigned to it, it will be | |
76 | * removed, and the new name will be saved instead. | |
77 | * | |
78 | * @param[in] channel The channel whose name to set. | |
79 | * @param[in] name The new name that the specified channel should get. A | |
80 | * copy of the string is made. | |
81 | * | |
82 | * @return SR_OK on success, or SR_ERR_ARG on invalid arguments. | |
83 | * | |
84 | * @since 0.3.0 | |
85 | */ | |
86 | SR_API int sr_dev_channel_name_set(struct sr_channel *channel, | |
87 | const char *name) | |
88 | { | |
89 | if (!channel) { | |
90 | sr_err("%s: channel was NULL", __func__); | |
91 | return SR_ERR_ARG; | |
92 | } | |
93 | ||
94 | g_free(channel->name); | |
95 | channel->name = g_strdup(name); | |
96 | return SR_OK; | |
97 | } | |
98 | ||
99 | /** | |
100 | * Enable or disable a channel. | |
101 | * | |
102 | * @param[in] channel The channel to enable or disable. | |
103 | * @param[in] state TRUE to enable the channel, FALSE to disable. | |
104 | * | |
105 | * @return SR_OK on success or SR_ERR on failure. In case of invalid | |
106 | * arguments, SR_ERR_ARG is returned and the channel enabled state | |
107 | * remains unchanged. | |
108 | * | |
109 | * @since 0.3.0 | |
110 | */ | |
111 | SR_API int sr_dev_channel_enable(struct sr_channel *channel, | |
112 | gboolean state) | |
113 | { | |
114 | int ret; | |
115 | gboolean was_enabled; | |
116 | struct sr_dev_inst *sdi; | |
117 | ||
118 | if (!channel) | |
119 | return SR_ERR_ARG; | |
120 | ||
121 | sdi = channel->sdi; | |
122 | was_enabled = channel->enabled; | |
123 | channel->enabled = state; | |
124 | if (!state != !was_enabled && sdi->driver | |
125 | && sdi->driver->config_channel_set) { | |
126 | ret = sdi->driver->config_channel_set( | |
127 | sdi, channel, SR_CHANNEL_SET_ENABLED); | |
128 | /* Roll back change if it wasn't applicable. */ | |
129 | if (ret != SR_OK) | |
130 | return ret; | |
131 | } | |
132 | ||
133 | return SR_OK; | |
134 | } | |
135 | ||
136 | /* Returns the next enabled channel, wrapping around if necessary. */ | |
137 | SR_PRIV struct sr_channel *sr_next_enabled_channel(const struct sr_dev_inst *sdi, | |
138 | struct sr_channel *cur_channel) | |
139 | { | |
140 | struct sr_channel *next_channel; | |
141 | GSList *l; | |
142 | ||
143 | next_channel = cur_channel; | |
144 | do { | |
145 | l = g_slist_find(sdi->channels, next_channel); | |
146 | if (l && l->next) | |
147 | next_channel = l->next->data; | |
148 | else | |
149 | next_channel = sdi->channels->data; | |
150 | } while (!next_channel->enabled); | |
151 | ||
152 | return next_channel; | |
153 | } | |
154 | ||
155 | /** | |
156 | * Determine whether the specified device instance has the specified | |
157 | * capability. | |
158 | * | |
159 | * @param sdi Pointer to the device instance to be checked. Must not be NULL. | |
160 | * If the device's 'driver' field is NULL (virtual device), this | |
161 | * function will always return FALSE (virtual devices don't have | |
162 | * a hardware capabilities list). | |
163 | * @param[in] key The option that should be checked for is supported by the | |
164 | * specified device. | |
165 | * | |
166 | * @retval TRUE Device has the specified option | |
167 | * @retval FALSE Device does not have the specified option, invalid input | |
168 | * parameters or other error conditions. | |
169 | * | |
170 | * @since 0.2.0 | |
171 | */ | |
172 | SR_API gboolean sr_dev_has_option(const struct sr_dev_inst *sdi, int key) | |
173 | { | |
174 | GVariant *gvar; | |
175 | const int *devopts; | |
176 | gsize num_opts, i; | |
177 | int ret; | |
178 | ||
179 | if (!sdi || !sdi->driver || !sdi->driver->config_list) | |
180 | return FALSE; | |
181 | ||
182 | if (sdi->driver->config_list(SR_CONF_DEVICE_OPTIONS, | |
183 | &gvar, sdi, NULL) != SR_OK) | |
184 | return FALSE; | |
185 | ||
186 | ret = FALSE; | |
187 | devopts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(int32_t)); | |
188 | for (i = 0; i < num_opts; i++) { | |
189 | if ((devopts[i] & SR_CONF_MASK) == key) { | |
190 | ret = TRUE; | |
191 | break; | |
192 | } | |
193 | } | |
194 | g_variant_unref(gvar); | |
195 | ||
196 | return ret; | |
197 | } | |
198 | ||
199 | /** | |
200 | * Enumerate the configuration options of the specified item. | |
201 | * | |
202 | * @param driver Pointer to the driver to be checked. Must not be NULL. | |
203 | * @param sdi Pointer to the device instance to be checked. May be NULL to | |
204 | * check driver options. | |
205 | * @param cg Pointer to a channel group, if a specific channel group is to | |
206 | * be checked. Must be NULL to check device-wide options. | |
207 | * @return A GArray * of enum sr_configkey values, or NULL on invalid | |
208 | * arguments. The array must be freed by the caller using | |
209 | * g_array_free(). | |
210 | * | |
211 | * @since 0.4.0 | |
212 | */ | |
213 | SR_API GArray *sr_dev_options( | |
214 | const struct sr_dev_driver *driver, const struct sr_dev_inst *sdi, | |
215 | const struct sr_channel_group *cg) | |
216 | { | |
217 | GVariant *gvar; | |
218 | const uint32_t *opts; | |
219 | uint32_t opt; | |
220 | gsize num_opts, i; | |
221 | GArray *result; | |
222 | ||
223 | if (!driver || !driver->config_list) | |
224 | return NULL; | |
225 | ||
226 | if (sdi && sdi->driver != driver) | |
227 | return NULL; | |
228 | ||
229 | if (driver->config_list(SR_CONF_DEVICE_OPTIONS, &gvar, sdi, cg) != SR_OK) | |
230 | return NULL; | |
231 | ||
232 | opts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(uint32_t)); | |
233 | ||
234 | result = g_array_sized_new(FALSE, FALSE, sizeof(uint32_t), num_opts); | |
235 | ||
236 | for (i = 0; i < num_opts; i++) { | |
237 | opt = opts[i] & SR_CONF_MASK; | |
238 | g_array_insert_val(result, i, opt); | |
239 | } | |
240 | ||
241 | g_variant_unref(gvar); | |
242 | ||
243 | return result; | |
244 | } | |
245 | ||
246 | /** | |
247 | * Enumerate the configuration capabilities supported by a device instance | |
248 | * for a given configuration key. | |
249 | * | |
250 | * @param sdi Pointer to the device instance to be checked. Must not be NULL. | |
251 | * If the device's 'driver' field is NULL (virtual device), this | |
252 | * function will always return FALSE (virtual devices don't have | |
253 | * a hardware capabilities list). | |
254 | * @param cg Pointer to a channel group, if a specific channel group is to | |
255 | * be checked. Must be NULL to check device-wide options. | |
256 | * @param[in] key The option that should be checked for is supported by the | |
257 | * specified device. | |
258 | * | |
259 | * @retval A bitmask of enum sr_configcap values, which will be zero for | |
260 | * invalid inputs or if the key is unsupported. | |
261 | * | |
262 | * @since 0.4.0 | |
263 | */ | |
264 | SR_API int sr_dev_config_capabilities_list(const struct sr_dev_inst *sdi, | |
265 | const struct sr_channel_group *cg, const int key) | |
266 | { | |
267 | GVariant *gvar; | |
268 | const int *devopts; | |
269 | gsize num_opts, i; | |
270 | int ret; | |
271 | ||
272 | if (!sdi || !sdi->driver || !sdi->driver->config_list) | |
273 | return 0; | |
274 | ||
275 | if (sdi->driver->config_list(SR_CONF_DEVICE_OPTIONS, | |
276 | &gvar, sdi, cg) != SR_OK) | |
277 | return 0; | |
278 | ||
279 | ret = 0; | |
280 | devopts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(int32_t)); | |
281 | for (i = 0; i < num_opts; i++) { | |
282 | if ((devopts[i] & SR_CONF_MASK) == key) { | |
283 | ret = devopts[i] & ~SR_CONF_MASK; | |
284 | break; | |
285 | } | |
286 | } | |
287 | g_variant_unref(gvar); | |
288 | ||
289 | return ret; | |
290 | } | |
291 | ||
292 | /** | |
293 | * Allocate and init a new user-generated device instance. | |
294 | * | |
295 | * @param vendor Device vendor | |
296 | * @param model Device model | |
297 | * @param version Device version | |
298 | * | |
299 | * @retval struct sr_dev_inst *. Dynamically allocated, free using | |
300 | * sr_dev_inst_free(). | |
301 | */ | |
302 | SR_API struct sr_dev_inst *sr_dev_inst_user_new(const char *vendor, | |
303 | const char *model, const char *version) | |
304 | { | |
305 | struct sr_dev_inst *sdi; | |
306 | ||
307 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
308 | ||
309 | sdi->vendor = g_strdup(vendor); | |
310 | sdi->model = g_strdup(model); | |
311 | sdi->version = g_strdup(version); | |
312 | sdi->inst_type = SR_INST_USER; | |
313 | ||
314 | return sdi; | |
315 | } | |
316 | ||
317 | /** | |
318 | * Add a new channel to the specified device instance. | |
319 | */ | |
320 | SR_API int sr_dev_inst_channel_add(struct sr_dev_inst *sdi, int index, int type, const char *name) | |
321 | { | |
322 | if (!sdi || sdi->inst_type != SR_INST_USER || index < 0) | |
323 | return SR_ERR_ARG; | |
324 | ||
325 | sr_channel_new(sdi, index, type, TRUE, name); | |
326 | ||
327 | return SR_OK; | |
328 | } | |
329 | ||
330 | /** @private | |
331 | * Free device instance struct created by sr_dev_inst(). | |
332 | * @param sdi device instance to free. | |
333 | */ | |
334 | SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi) | |
335 | { | |
336 | struct sr_channel *ch; | |
337 | struct sr_channel_group *cg; | |
338 | GSList *l; | |
339 | ||
340 | for (l = sdi->channels; l; l = l->next) { | |
341 | ch = l->data; | |
342 | g_free(ch->name); | |
343 | g_free(ch->priv); | |
344 | g_free(ch); | |
345 | } | |
346 | g_slist_free(sdi->channels); | |
347 | ||
348 | for (l = sdi->channel_groups; l; l = l->next) { | |
349 | cg = l->data; | |
350 | g_free(cg->name); | |
351 | g_slist_free(cg->channels); | |
352 | g_free(cg->priv); | |
353 | g_free(cg); | |
354 | } | |
355 | g_slist_free(sdi->channel_groups); | |
356 | ||
357 | if (sdi->session) | |
358 | sr_session_dev_remove(sdi->session, sdi); | |
359 | ||
360 | g_free(sdi->vendor); | |
361 | g_free(sdi->model); | |
362 | g_free(sdi->version); | |
363 | g_free(sdi->serial_num); | |
364 | g_free(sdi->connection_id); | |
365 | g_free(sdi); | |
366 | } | |
367 | ||
368 | #ifdef HAVE_LIBUSB_1_0 | |
369 | ||
370 | /** @private | |
371 | * Allocate and init struct for USB device instance. | |
372 | * @param[in] bus @copydoc sr_usb_dev_inst::bus | |
373 | * @param[in] address @copydoc sr_usb_dev_inst::address | |
374 | * @param[in] hdl @copydoc sr_usb_dev_inst::devhdl | |
375 | * | |
376 | * @retval other struct sr_usb_dev_inst * for USB device instance. | |
377 | */ | |
378 | SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus, | |
379 | uint8_t address, struct libusb_device_handle *hdl) | |
380 | { | |
381 | struct sr_usb_dev_inst *udi; | |
382 | ||
383 | udi = g_malloc0(sizeof(struct sr_usb_dev_inst)); | |
384 | udi->bus = bus; | |
385 | udi->address = address; | |
386 | udi->devhdl = hdl; | |
387 | ||
388 | return udi; | |
389 | } | |
390 | ||
391 | /** @private | |
392 | * Free struct * allocated by sr_usb_dev_inst(). | |
393 | * @param usb struct* to free. Must not be NULL. | |
394 | */ | |
395 | SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb) | |
396 | { | |
397 | g_free(usb); | |
398 | } | |
399 | ||
400 | #endif | |
401 | ||
402 | #ifdef HAVE_LIBSERIALPORT | |
403 | ||
404 | /** | |
405 | * @private | |
406 | * | |
407 | * Both parameters are copied to newly allocated strings, and freed | |
408 | * automatically by sr_serial_dev_inst_free(). | |
409 | * | |
410 | * @param[in] port OS-specific serial port specification. Examples: | |
411 | * "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1". | |
412 | * Must not be NULL. | |
413 | * @param[in] serialcomm A serial communication parameters string, in the form | |
414 | * of \<speed\>/\<data bits\>\<parity\>\<stopbits\>, for example | |
415 | * "9600/8n1" or "600/7o2". This is an optional parameter; | |
416 | * it may be filled in later. Can be NULL. | |
417 | * | |
418 | * @return A pointer to a newly initialized struct sr_serial_dev_inst, | |
419 | * or NULL on error. | |
420 | */ | |
421 | SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port, | |
422 | const char *serialcomm) | |
423 | { | |
424 | struct sr_serial_dev_inst *serial; | |
425 | ||
426 | serial = g_malloc0(sizeof(struct sr_serial_dev_inst)); | |
427 | serial->port = g_strdup(port); | |
428 | if (serialcomm) | |
429 | serial->serialcomm = g_strdup(serialcomm); | |
430 | ||
431 | return serial; | |
432 | } | |
433 | ||
434 | /** @private | |
435 | * Free struct sr_serial_dev_inst * allocated by sr_serial_dev_inst(). | |
436 | * @param serial struct sr_serial_dev_inst * to free. Must not be NULL. | |
437 | */ | |
438 | SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial) | |
439 | { | |
440 | g_free(serial->port); | |
441 | g_free(serial->serialcomm); | |
442 | g_free(serial); | |
443 | } | |
444 | #endif | |
445 | ||
446 | /** @private */ | |
447 | SR_PRIV struct sr_usbtmc_dev_inst *sr_usbtmc_dev_inst_new(const char *device) | |
448 | { | |
449 | struct sr_usbtmc_dev_inst *usbtmc; | |
450 | ||
451 | usbtmc = g_malloc0(sizeof(struct sr_usbtmc_dev_inst)); | |
452 | usbtmc->device = g_strdup(device); | |
453 | usbtmc->fd = -1; | |
454 | ||
455 | return usbtmc; | |
456 | } | |
457 | ||
458 | /** @private */ | |
459 | SR_PRIV void sr_usbtmc_dev_inst_free(struct sr_usbtmc_dev_inst *usbtmc) | |
460 | { | |
461 | g_free(usbtmc->device); | |
462 | g_free(usbtmc); | |
463 | } | |
464 | ||
465 | /** | |
466 | * Get the list of devices/instances of the specified driver. | |
467 | * | |
468 | * @param driver The driver to use. Must not be NULL. | |
469 | * | |
470 | * @return The list of devices/instances of this driver, or NULL upon errors | |
471 | * or if the list is empty. | |
472 | * | |
473 | * @since 0.2.0 | |
474 | */ | |
475 | SR_API GSList *sr_dev_list(const struct sr_dev_driver *driver) | |
476 | { | |
477 | if (driver && driver->dev_list) | |
478 | return driver->dev_list(driver); | |
479 | else | |
480 | return NULL; | |
481 | } | |
482 | ||
483 | /** | |
484 | * Clear the list of device instances a driver knows about. | |
485 | * | |
486 | * @param driver The driver to use. This must be a pointer to one of | |
487 | * the entries returned by sr_driver_list(). Must not be NULL. | |
488 | * | |
489 | * @retval SR_OK Success | |
490 | * @retval SR_ERR_ARG Invalid driver | |
491 | * | |
492 | * @since 0.2.0 | |
493 | */ | |
494 | SR_API int sr_dev_clear(const struct sr_dev_driver *driver) | |
495 | { | |
496 | int ret; | |
497 | ||
498 | if (!driver) { | |
499 | sr_err("Invalid driver."); | |
500 | return SR_ERR_ARG; | |
501 | } | |
502 | ||
503 | if (driver->dev_clear) | |
504 | ret = driver->dev_clear(driver); | |
505 | else | |
506 | ret = std_dev_clear(driver, NULL); | |
507 | ||
508 | return ret; | |
509 | } | |
510 | ||
511 | /** | |
512 | * Open the specified device. | |
513 | * | |
514 | * @param sdi Device instance to use. Must not be NULL. | |
515 | * | |
516 | * @return SR_OK upon success, a negative error code upon errors. | |
517 | * | |
518 | * @since 0.2.0 | |
519 | */ | |
520 | SR_API int sr_dev_open(struct sr_dev_inst *sdi) | |
521 | { | |
522 | int ret; | |
523 | ||
524 | if (!sdi || !sdi->driver || !sdi->driver->dev_open) | |
525 | return SR_ERR; | |
526 | ||
527 | ret = sdi->driver->dev_open(sdi); | |
528 | ||
529 | return ret; | |
530 | } | |
531 | ||
532 | /** | |
533 | * Close the specified device. | |
534 | * | |
535 | * @param sdi Device instance to use. Must not be NULL. | |
536 | * | |
537 | * @return SR_OK upon success, a negative error code upon errors. | |
538 | * | |
539 | * @since 0.2.0 | |
540 | */ | |
541 | SR_API int sr_dev_close(struct sr_dev_inst *sdi) | |
542 | { | |
543 | int ret; | |
544 | ||
545 | if (!sdi || !sdi->driver || !sdi->driver->dev_close) | |
546 | return SR_ERR; | |
547 | ||
548 | ret = sdi->driver->dev_close(sdi); | |
549 | ||
550 | return ret; | |
551 | } | |
552 | ||
553 | /** | |
554 | * Queries a device instances' driver. | |
555 | * | |
556 | * @param sdi Device instance to use. Must not be NULL. | |
557 | * | |
558 | * @return The driver instance or NULL on error. | |
559 | */ | |
560 | SR_API struct sr_dev_driver *sr_dev_inst_driver_get(const struct sr_dev_inst *sdi) | |
561 | { | |
562 | if (!sdi || !sdi->driver) | |
563 | return NULL; | |
564 | ||
565 | return sdi->driver; | |
566 | } | |
567 | ||
568 | /** | |
569 | * Queries a device instances' vendor. | |
570 | * | |
571 | * @param sdi Device instance to use. Must not be NULL. | |
572 | * | |
573 | * @return The vendor string or NULL. | |
574 | */ | |
575 | SR_API const char *sr_dev_inst_vendor_get(const struct sr_dev_inst *sdi) | |
576 | { | |
577 | if (!sdi) | |
578 | return NULL; | |
579 | ||
580 | return sdi->vendor; | |
581 | } | |
582 | ||
583 | /** | |
584 | * Queries a device instances' model. | |
585 | * | |
586 | * @param sdi Device instance to use. Must not be NULL. | |
587 | * | |
588 | * @return The model string or NULL. | |
589 | */ | |
590 | SR_API const char *sr_dev_inst_model_get(const struct sr_dev_inst *sdi) | |
591 | { | |
592 | if (!sdi) | |
593 | return NULL; | |
594 | ||
595 | return sdi->model; | |
596 | } | |
597 | ||
598 | /** | |
599 | * Queries a device instances' version. | |
600 | * | |
601 | * @param sdi Device instance to use. Must not be NULL. | |
602 | * | |
603 | * @return The version string or NULL. | |
604 | */ | |
605 | SR_API const char *sr_dev_inst_version_get(const struct sr_dev_inst *sdi) | |
606 | { | |
607 | if (!sdi) | |
608 | return NULL; | |
609 | ||
610 | return sdi->version; | |
611 | } | |
612 | ||
613 | /** | |
614 | * Queries a device instances' serial number. | |
615 | * | |
616 | * @param sdi Device instance to use. Must not be NULL. | |
617 | * | |
618 | * @return The serial number string or NULL. | |
619 | */ | |
620 | SR_API const char *sr_dev_inst_sernum_get(const struct sr_dev_inst *sdi) | |
621 | { | |
622 | if (!sdi) | |
623 | return NULL; | |
624 | ||
625 | return sdi->serial_num; | |
626 | } | |
627 | ||
628 | /** | |
629 | * Queries a device instances' connection identifier. | |
630 | * | |
631 | * @param sdi Device instance to use. Must not be NULL. | |
632 | * | |
633 | * @return A copy of the connection id string or NULL. The caller is responsible | |
634 | * for g_free()ing the string when it is no longer needed. | |
635 | */ | |
636 | SR_API const char *sr_dev_inst_connid_get(const struct sr_dev_inst *sdi) | |
637 | { | |
638 | #ifdef HAVE_LIBUSB_1_0 | |
639 | struct drv_context *drvc; | |
640 | int cnt, i, a, b; | |
641 | char connection_id[64]; | |
642 | struct sr_usb_dev_inst *usb; | |
643 | struct libusb_device **devlist; | |
644 | #endif | |
645 | ||
646 | if (!sdi) | |
647 | return NULL; | |
648 | ||
649 | #ifdef HAVE_LIBSERIALPORT | |
650 | struct sr_serial_dev_inst *serial; | |
651 | ||
652 | if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_SERIAL)) { | |
653 | /* connection_id isn't populated, let's do that here. */ | |
654 | ||
655 | serial = sdi->conn; | |
656 | ((struct sr_dev_inst *)sdi)->connection_id = g_strdup(serial->port); | |
657 | } | |
658 | #endif | |
659 | ||
660 | #ifdef HAVE_LIBUSB_1_0 | |
661 | if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_USB)) { | |
662 | /* connection_id isn't populated, let's do that here. */ | |
663 | ||
664 | drvc = sdi->driver->context; | |
665 | usb = sdi->conn; | |
666 | ||
667 | if ((cnt = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist)) < 0) { | |
668 | sr_err("Failed to retrieve device list: %s.", | |
669 | libusb_error_name(cnt)); | |
670 | return NULL; | |
671 | } | |
672 | ||
673 | for (i = 0; i < cnt; i++) { | |
674 | /* Find the USB device by the logical address we know. */ | |
675 | b = libusb_get_bus_number(devlist[i]); | |
676 | a = libusb_get_device_address(devlist[i]); | |
677 | if (b != usb->bus || a != usb->address) | |
678 | continue; | |
679 | ||
680 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
681 | ((struct sr_dev_inst *)sdi)->connection_id = g_strdup(connection_id); | |
682 | break; | |
683 | } | |
684 | ||
685 | libusb_free_device_list(devlist, 1); | |
686 | } | |
687 | #endif | |
688 | ||
689 | return sdi->connection_id; | |
690 | } | |
691 | ||
692 | /** | |
693 | * Queries a device instances' channel list. | |
694 | * | |
695 | * @param sdi Device instance to use. Must not be NULL. | |
696 | * | |
697 | * @return The GSList of channels or NULL. | |
698 | */ | |
699 | SR_API GSList *sr_dev_inst_channels_get(const struct sr_dev_inst *sdi) | |
700 | { | |
701 | if (!sdi) | |
702 | return NULL; | |
703 | ||
704 | return sdi->channels; | |
705 | } | |
706 | ||
707 | /** | |
708 | * Queries a device instances' channel groups list. | |
709 | * | |
710 | * @param sdi Device instance to use. Must not be NULL. | |
711 | * | |
712 | * @return The GSList of channel groups or NULL. | |
713 | */ | |
714 | SR_API GSList *sr_dev_inst_channel_groups_get(const struct sr_dev_inst *sdi) | |
715 | { | |
716 | if (!sdi) | |
717 | return NULL; | |
718 | ||
719 | return sdi->channel_groups; | |
720 | } | |
721 | ||
722 | /** @} */ |