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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 | * Allocate and init a new user-generated device instance. | |
201 | * | |
202 | * @param vendor Device vendor | |
203 | * @param model Device model | |
204 | * @param version Device version | |
205 | * | |
206 | * @retval struct sr_dev_inst *. Dynamically allocated, free using | |
207 | * sr_dev_inst_free(). | |
208 | */ | |
209 | SR_API struct sr_dev_inst *sr_dev_inst_user_new(const char *vendor, | |
210 | const char *model, const char *version) | |
211 | { | |
212 | struct sr_dev_inst *sdi; | |
213 | ||
214 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
215 | ||
216 | sdi->vendor = g_strdup(vendor); | |
217 | sdi->model = g_strdup(model); | |
218 | sdi->version = g_strdup(version); | |
219 | sdi->inst_type = SR_INST_USER; | |
220 | ||
221 | return sdi; | |
222 | } | |
223 | ||
224 | /** | |
225 | * Add a new channel to the specified device instance. | |
226 | */ | |
227 | SR_API int sr_dev_inst_channel_add(struct sr_dev_inst *sdi, int index, int type, const char *name) | |
228 | { | |
229 | if (!sdi || sdi->inst_type != SR_INST_USER || index < 0) | |
230 | return SR_ERR_ARG; | |
231 | ||
232 | sr_channel_new(sdi, index, type, TRUE, name); | |
233 | ||
234 | return SR_OK; | |
235 | } | |
236 | ||
237 | /** @private | |
238 | * Free device instance struct created by sr_dev_inst(). | |
239 | * @param sdi device instance to free. | |
240 | */ | |
241 | SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi) | |
242 | { | |
243 | struct sr_channel *ch; | |
244 | struct sr_channel_group *cg; | |
245 | GSList *l; | |
246 | ||
247 | for (l = sdi->channels; l; l = l->next) { | |
248 | ch = l->data; | |
249 | g_free(ch->name); | |
250 | g_free(ch->priv); | |
251 | g_free(ch); | |
252 | } | |
253 | g_slist_free(sdi->channels); | |
254 | ||
255 | for (l = sdi->channel_groups; l; l = l->next) { | |
256 | cg = l->data; | |
257 | g_free(cg->name); | |
258 | g_slist_free(cg->channels); | |
259 | g_free(cg->priv); | |
260 | g_free(cg); | |
261 | } | |
262 | g_slist_free(sdi->channel_groups); | |
263 | ||
264 | g_free(sdi->vendor); | |
265 | g_free(sdi->model); | |
266 | g_free(sdi->version); | |
267 | g_free(sdi->serial_num); | |
268 | g_free(sdi->connection_id); | |
269 | g_free(sdi); | |
270 | } | |
271 | ||
272 | #ifdef HAVE_LIBUSB_1_0 | |
273 | ||
274 | /** @private | |
275 | * Allocate and init struct for USB device instance. | |
276 | * @param[in] bus @copydoc sr_usb_dev_inst::bus | |
277 | * @param[in] address @copydoc sr_usb_dev_inst::address | |
278 | * @param[in] hdl @copydoc sr_usb_dev_inst::devhdl | |
279 | * | |
280 | * @retval other struct sr_usb_dev_inst * for USB device instance. | |
281 | */ | |
282 | SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus, | |
283 | uint8_t address, struct libusb_device_handle *hdl) | |
284 | { | |
285 | struct sr_usb_dev_inst *udi; | |
286 | ||
287 | udi = g_malloc0(sizeof(struct sr_usb_dev_inst)); | |
288 | udi->bus = bus; | |
289 | udi->address = address; | |
290 | udi->devhdl = hdl; | |
291 | ||
292 | return udi; | |
293 | } | |
294 | ||
295 | /** @private | |
296 | * Free struct * allocated by sr_usb_dev_inst(). | |
297 | * @param usb struct* to free. Must not be NULL. | |
298 | */ | |
299 | SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb) | |
300 | { | |
301 | g_free(usb); | |
302 | } | |
303 | ||
304 | #endif | |
305 | ||
306 | #ifdef HAVE_LIBSERIALPORT | |
307 | ||
308 | /** | |
309 | * @private | |
310 | * | |
311 | * Both parameters are copied to newly allocated strings, and freed | |
312 | * automatically by sr_serial_dev_inst_free(). | |
313 | * | |
314 | * @param[in] port OS-specific serial port specification. Examples: | |
315 | * "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1". | |
316 | * Must not be NULL. | |
317 | * @param[in] serialcomm A serial communication parameters string, in the form | |
318 | * of \<speed\>/\<data bits\>\<parity\>\<stopbits\>, for example | |
319 | * "9600/8n1" or "600/7o2". This is an optional parameter; | |
320 | * it may be filled in later. Can be NULL. | |
321 | * | |
322 | * @return A pointer to a newly initialized struct sr_serial_dev_inst, | |
323 | * or NULL on error. | |
324 | */ | |
325 | SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port, | |
326 | const char *serialcomm) | |
327 | { | |
328 | struct sr_serial_dev_inst *serial; | |
329 | ||
330 | serial = g_malloc0(sizeof(struct sr_serial_dev_inst)); | |
331 | serial->port = g_strdup(port); | |
332 | if (serialcomm) | |
333 | serial->serialcomm = g_strdup(serialcomm); | |
334 | ||
335 | return serial; | |
336 | } | |
337 | ||
338 | /** @private | |
339 | * Free struct sr_serial_dev_inst * allocated by sr_serial_dev_inst(). | |
340 | * @param serial struct sr_serial_dev_inst * to free. Must not be NULL. | |
341 | */ | |
342 | SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial) | |
343 | { | |
344 | g_free(serial->port); | |
345 | g_free(serial->serialcomm); | |
346 | g_free(serial); | |
347 | } | |
348 | #endif | |
349 | ||
350 | /** @private */ | |
351 | SR_PRIV struct sr_usbtmc_dev_inst *sr_usbtmc_dev_inst_new(const char *device) | |
352 | { | |
353 | struct sr_usbtmc_dev_inst *usbtmc; | |
354 | ||
355 | usbtmc = g_malloc0(sizeof(struct sr_usbtmc_dev_inst)); | |
356 | usbtmc->device = g_strdup(device); | |
357 | usbtmc->fd = -1; | |
358 | ||
359 | return usbtmc; | |
360 | } | |
361 | ||
362 | /** @private */ | |
363 | SR_PRIV void sr_usbtmc_dev_inst_free(struct sr_usbtmc_dev_inst *usbtmc) | |
364 | { | |
365 | g_free(usbtmc->device); | |
366 | g_free(usbtmc); | |
367 | } | |
368 | ||
369 | /** | |
370 | * Get the list of devices/instances of the specified driver. | |
371 | * | |
372 | * @param driver The driver to use. Must not be NULL. | |
373 | * | |
374 | * @return The list of devices/instances of this driver, or NULL upon errors | |
375 | * or if the list is empty. | |
376 | * | |
377 | * @since 0.2.0 | |
378 | */ | |
379 | SR_API GSList *sr_dev_list(const struct sr_dev_driver *driver) | |
380 | { | |
381 | if (driver && driver->dev_list) | |
382 | return driver->dev_list(driver); | |
383 | else | |
384 | return NULL; | |
385 | } | |
386 | ||
387 | /** | |
388 | * Clear the list of device instances a driver knows about. | |
389 | * | |
390 | * @param driver The driver to use. This must be a pointer to one of | |
391 | * the entries returned by sr_driver_list(). Must not be NULL. | |
392 | * | |
393 | * @retval SR_OK Success | |
394 | * @retval SR_ERR_ARG Invalid driver | |
395 | * | |
396 | * @since 0.2.0 | |
397 | */ | |
398 | SR_API int sr_dev_clear(const struct sr_dev_driver *driver) | |
399 | { | |
400 | int ret; | |
401 | ||
402 | if (!driver) { | |
403 | sr_err("Invalid driver."); | |
404 | return SR_ERR_ARG; | |
405 | } | |
406 | ||
407 | if (driver->dev_clear) | |
408 | ret = driver->dev_clear(driver); | |
409 | else | |
410 | ret = std_dev_clear(driver, NULL); | |
411 | ||
412 | return ret; | |
413 | } | |
414 | ||
415 | /** | |
416 | * Open the specified device. | |
417 | * | |
418 | * @param sdi Device instance to use. Must not be NULL. | |
419 | * | |
420 | * @return SR_OK upon success, a negative error code upon errors. | |
421 | * | |
422 | * @since 0.2.0 | |
423 | */ | |
424 | SR_API int sr_dev_open(struct sr_dev_inst *sdi) | |
425 | { | |
426 | int ret; | |
427 | ||
428 | if (!sdi || !sdi->driver || !sdi->driver->dev_open) | |
429 | return SR_ERR; | |
430 | ||
431 | ret = sdi->driver->dev_open(sdi); | |
432 | ||
433 | return ret; | |
434 | } | |
435 | ||
436 | /** | |
437 | * Close the specified device. | |
438 | * | |
439 | * @param sdi Device instance to use. Must not be NULL. | |
440 | * | |
441 | * @return SR_OK upon success, a negative error code upon errors. | |
442 | * | |
443 | * @since 0.2.0 | |
444 | */ | |
445 | SR_API int sr_dev_close(struct sr_dev_inst *sdi) | |
446 | { | |
447 | int ret; | |
448 | ||
449 | if (!sdi || !sdi->driver || !sdi->driver->dev_close) | |
450 | return SR_ERR; | |
451 | ||
452 | ret = sdi->driver->dev_close(sdi); | |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
457 | /** | |
458 | * Queries a device instances' driver. | |
459 | * | |
460 | * @param sdi Device instance to use. Must not be NULL. | |
461 | * | |
462 | * @return The driver instance or NULL on error. | |
463 | */ | |
464 | SR_API struct sr_dev_driver *sr_dev_inst_driver_get(const struct sr_dev_inst *sdi) | |
465 | { | |
466 | if (!sdi || !sdi->driver) | |
467 | return NULL; | |
468 | ||
469 | return sdi->driver; | |
470 | } | |
471 | ||
472 | /** | |
473 | * Queries a device instances' vendor. | |
474 | * | |
475 | * @param sdi Device instance to use. Must not be NULL. | |
476 | * | |
477 | * @return The vendor string or NULL. | |
478 | */ | |
479 | SR_API const char *sr_dev_inst_vendor_get(const struct sr_dev_inst *sdi) | |
480 | { | |
481 | if (!sdi) | |
482 | return NULL; | |
483 | ||
484 | return sdi->vendor; | |
485 | } | |
486 | ||
487 | /** | |
488 | * Queries a device instances' model. | |
489 | * | |
490 | * @param sdi Device instance to use. Must not be NULL. | |
491 | * | |
492 | * @return The model string or NULL. | |
493 | */ | |
494 | SR_API const char *sr_dev_inst_model_get(const struct sr_dev_inst *sdi) | |
495 | { | |
496 | if (!sdi) | |
497 | return NULL; | |
498 | ||
499 | return sdi->model; | |
500 | } | |
501 | ||
502 | /** | |
503 | * Queries a device instances' version. | |
504 | * | |
505 | * @param sdi Device instance to use. Must not be NULL. | |
506 | * | |
507 | * @return The version string or NULL. | |
508 | */ | |
509 | SR_API const char *sr_dev_inst_version_get(const struct sr_dev_inst *sdi) | |
510 | { | |
511 | if (!sdi) | |
512 | return NULL; | |
513 | ||
514 | return sdi->version; | |
515 | } | |
516 | ||
517 | /** | |
518 | * Queries a device instances' serial number. | |
519 | * | |
520 | * @param sdi Device instance to use. Must not be NULL. | |
521 | * | |
522 | * @return The serial number string or NULL. | |
523 | */ | |
524 | SR_API const char *sr_dev_inst_sernum_get(const struct sr_dev_inst *sdi) | |
525 | { | |
526 | if (!sdi) | |
527 | return NULL; | |
528 | ||
529 | return sdi->serial_num; | |
530 | } | |
531 | ||
532 | /** | |
533 | * Queries a device instances' connection identifier. | |
534 | * | |
535 | * @param sdi Device instance to use. Must not be NULL. | |
536 | * | |
537 | * @return A copy of the connection id string or NULL. The caller is responsible | |
538 | * for g_free()ing the string when it is no longer needed. | |
539 | */ | |
540 | SR_API const char *sr_dev_inst_connid_get(const struct sr_dev_inst *sdi) | |
541 | { | |
542 | #ifdef HAVE_LIBUSB_1_0 | |
543 | struct drv_context *drvc; | |
544 | int cnt, i, a, b; | |
545 | char connection_id[64]; | |
546 | struct sr_usb_dev_inst *usb; | |
547 | struct libusb_device **devlist; | |
548 | #endif | |
549 | ||
550 | if (!sdi) | |
551 | return NULL; | |
552 | ||
553 | #ifdef HAVE_LIBSERIALPORT | |
554 | struct sr_serial_dev_inst *serial; | |
555 | ||
556 | if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_SERIAL)) { | |
557 | /* connection_id isn't populated, let's do that here. */ | |
558 | ||
559 | serial = sdi->conn; | |
560 | ((struct sr_dev_inst *)sdi)->connection_id = g_strdup(serial->port); | |
561 | } | |
562 | #endif | |
563 | ||
564 | #ifdef HAVE_LIBUSB_1_0 | |
565 | if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_USB)) { | |
566 | /* connection_id isn't populated, let's do that here. */ | |
567 | ||
568 | drvc = sdi->driver->context; | |
569 | usb = sdi->conn; | |
570 | ||
571 | if ((cnt = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist)) < 0) { | |
572 | sr_err("Failed to retrieve device list: %s.", | |
573 | libusb_error_name(cnt)); | |
574 | return NULL; | |
575 | } | |
576 | ||
577 | for (i = 0; i < cnt; i++) { | |
578 | /* Find the USB device by the logical address we know. */ | |
579 | b = libusb_get_bus_number(devlist[i]); | |
580 | a = libusb_get_device_address(devlist[i]); | |
581 | if (b != usb->bus || a != usb->address) | |
582 | continue; | |
583 | ||
584 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
585 | ((struct sr_dev_inst *)sdi)->connection_id = g_strdup(connection_id); | |
586 | break; | |
587 | } | |
588 | ||
589 | libusb_free_device_list(devlist, 1); | |
590 | } | |
591 | #endif | |
592 | ||
593 | return sdi->connection_id; | |
594 | } | |
595 | ||
596 | /** | |
597 | * Queries a device instances' channel list. | |
598 | * | |
599 | * @param sdi Device instance to use. Must not be NULL. | |
600 | * | |
601 | * @return The GSList of channels or NULL. | |
602 | */ | |
603 | SR_API GSList *sr_dev_inst_channels_get(const struct sr_dev_inst *sdi) | |
604 | { | |
605 | if (!sdi) | |
606 | return NULL; | |
607 | ||
608 | return sdi->channels; | |
609 | } | |
610 | ||
611 | /** | |
612 | * Queries a device instances' channel groups list. | |
613 | * | |
614 | * @param sdi Device instance to use. Must not be NULL. | |
615 | * | |
616 | * @return The GSList of channel groups or NULL. | |
617 | */ | |
618 | SR_API GSList *sr_dev_inst_channel_groups_get(const struct sr_dev_inst *sdi) | |
619 | { | |
620 | if (!sdi) | |
621 | return NULL; | |
622 | ||
623 | return sdi->channel_groups; | |
624 | } | |
625 | ||
626 | /** @} */ |