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README.devices: uni-t-dmm devices need VID/PID now.
[libsigrok.git] / hwdriver.c
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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 <stdlib.h>
21#include <stdio.h>
22#include <sys/types.h>
23#include <dirent.h>
24#include <string.h>
25#include <glib.h>
26#include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
27#include "libsigrok.h"
28#include "libsigrok-internal.h"
29
30/* Message logging helpers with subsystem-specific prefix string. */
31#define LOG_PREFIX "hwdriver: "
32#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
33#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
34#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
35#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
36#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
37#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
38
39/**
40 * @file
41 *
42 * Hardware driver handling in libsigrok.
43 */
44
45/**
46 * @defgroup grp_driver Hardware drivers
47 *
48 * Hardware driver handling in libsigrok.
49 *
50 * @{
51 */
52
53static struct sr_config_info sr_config_info_data[] = {
54 {SR_CONF_CONN, SR_T_CHAR, "conn",
55 "Connection", NULL},
56 {SR_CONF_SERIALCOMM, SR_T_CHAR, "serialcomm",
57 "Serial communication", NULL},
58 {SR_CONF_SAMPLERATE, SR_T_UINT64, "samplerate",
59 "Sample rate", NULL},
60 {SR_CONF_CAPTURE_RATIO, SR_T_UINT64, "captureratio",
61 "Pre-trigger capture ratio", NULL},
62 {SR_CONF_PATTERN_MODE, SR_T_CHAR, "pattern",
63 "Pattern generator mode", NULL},
64 {SR_CONF_TRIGGER_TYPE, SR_T_CHAR, "triggertype",
65 "Trigger types", NULL},
66 {SR_CONF_EXTERNAL_CLOCK, SR_T_BOOL, "external_clock",
67 "External clock mode", NULL},
68 {SR_CONF_SWAP, SR_T_BOOL, "swap",
69 "Swap channel order", NULL},
70 {SR_CONF_RLE, SR_T_BOOL, "rle",
71 "Run Length Encoding", NULL},
72 {SR_CONF_TRIGGER_SLOPE, SR_T_UINT64, "triggerslope",
73 "Trigger slope", NULL},
74 {SR_CONF_TRIGGER_SOURCE, SR_T_CHAR, "triggersource",
75 "Trigger source", NULL},
76 {SR_CONF_HORIZ_TRIGGERPOS, SR_T_FLOAT, "horiz_triggerpos",
77 "Horizontal trigger position", NULL},
78 {SR_CONF_BUFFERSIZE, SR_T_UINT64, "buffersize",
79 "Buffer size", NULL},
80 {SR_CONF_TIMEBASE, SR_T_RATIONAL_PERIOD, "timebase",
81 "Time base", NULL},
82 {SR_CONF_FILTER, SR_T_CHAR, "filter",
83 "Filter targets", NULL},
84 {SR_CONF_VDIV, SR_T_RATIONAL_VOLT, "vdiv",
85 "Volts/div", NULL},
86 {SR_CONF_COUPLING, SR_T_CHAR, "coupling",
87 "Coupling", NULL},
88 {SR_CONF_DATALOG, SR_T_BOOL, "datalog",
89 "Datalog", NULL},
90 {SR_CONF_SPL_WEIGHT_FREQ, SR_T_CHAR, "spl_weight_freq",
91 "Sound pressure level frequency weighting", NULL},
92 {SR_CONF_SPL_WEIGHT_TIME, SR_T_CHAR, "spl_weight_time",
93 "Sound pressure level time weighting", NULL},
94 {SR_CONF_HOLD_MAX, SR_T_BOOL, "hold_max",
95 "Hold max", NULL},
96 {SR_CONF_HOLD_MIN, SR_T_BOOL, "hold_min",
97 "Hold min", NULL},
98 {SR_CONF_SPL_MEASUREMENT_RANGE, SR_T_UINT64_RANGE, "spl_meas_range",
99 "Sound pressure level measurement range", NULL},
100 {SR_CONF_VOLTAGE_THRESHOLD, SR_T_DOUBLE_RANGE, "voltage_threshold",
101 "Voltage threshold", NULL },
102 {SR_CONF_POWER_OFF, SR_T_BOOL, "power_off",
103 "Power off", NULL},
104 {SR_CONF_DATA_SOURCE, SR_T_CHAR, "data_source",
105 "Data source", NULL},
106 {0, 0, NULL, NULL, NULL},
107};
108
109/** @cond PRIVATE */
110#ifdef HAVE_HW_BRYMEN_DMM
111extern SR_PRIV struct sr_dev_driver brymen_bm857_driver_info;
112#endif
113#ifdef HAVE_HW_CEM_DT_885X
114extern SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info;
115#endif
116#ifdef HAVE_HW_CENTER_3XX
117extern SR_PRIV struct sr_dev_driver center_309_driver_info;
118extern SR_PRIV struct sr_dev_driver voltcraft_k204_driver_info;
119#endif
120#ifdef HAVE_HW_COLEAD_SLM
121extern SR_PRIV struct sr_dev_driver colead_slm_driver_info;
122#endif
123#ifdef HAVE_HW_DEMO
124extern SR_PRIV struct sr_dev_driver demo_driver_info;
125#endif
126#ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
127extern SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
128#endif
129#ifdef HAVE_HW_IKALOGIC_SCANAPLUS
130extern SR_PRIV struct sr_dev_driver ikalogic_scanaplus_driver_info;
131#endif
132#ifdef HAVE_HW_KECHENG_KC_330B
133extern SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info;
134#endif
135#ifdef HAVE_HW_LASCAR_EL_USB
136extern SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
137#endif
138#ifdef HAVE_HW_MIC_985XX
139extern SR_PRIV struct sr_dev_driver mic_98581_driver_info;
140extern SR_PRIV struct sr_dev_driver mic_98583_driver_info;
141#endif
142#ifdef HAVE_HW_NORMA_DMM
143extern SR_PRIV struct sr_dev_driver norma_dmm_driver_info;
144#endif
145#ifdef HAVE_HW_OLS
146extern SR_PRIV struct sr_dev_driver ols_driver_info;
147#endif
148#ifdef HAVE_HW_RIGOL_DS1XX2
149extern SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
150#endif
151#ifdef HAVE_HW_SALEAE_LOGIC16
152extern SR_PRIV struct sr_dev_driver saleae_logic16_driver_info;
153#endif
154#ifdef HAVE_HW_TELEINFO
155extern SR_PRIV struct sr_dev_driver teleinfo_driver_info;
156#endif
157#ifdef HAVE_HW_TONDAJ_SL_814
158extern SR_PRIV struct sr_dev_driver tondaj_sl_814_driver_info;
159#endif
160#ifdef HAVE_HW_UNI_T_UT32X
161extern SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info;
162#endif
163#ifdef HAVE_HW_VICTOR_DMM
164extern SR_PRIV struct sr_dev_driver victor_dmm_driver_info;
165#endif
166#ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
167extern SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
168#endif
169#ifdef HAVE_HW_ASIX_SIGMA
170extern SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
171#endif
172#ifdef HAVE_HW_CHRONOVU_LA8
173extern SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
174#endif
175#ifdef HAVE_HW_LINK_MSO19
176extern SR_PRIV struct sr_dev_driver link_mso19_driver_info;
177#endif
178#ifdef HAVE_HW_ALSA
179extern SR_PRIV struct sr_dev_driver alsa_driver_info;
180#endif
181#ifdef HAVE_HW_FX2LAFW
182extern SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
183#endif
184#ifdef HAVE_HW_HANTEK_DSO
185extern SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
186#endif
187#ifdef HAVE_HW_AGILENT_DMM
188extern SR_PRIV struct sr_dev_driver agdmm_driver_info;
189#endif
190#ifdef HAVE_HW_FLUKE_DMM
191extern SR_PRIV struct sr_dev_driver flukedmm_driver_info;
192#endif
193#ifdef HAVE_HW_SERIAL_DMM
194extern SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
195extern SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
196extern SR_PRIV struct sr_dev_driver metex_me31_driver_info;
197extern SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
198extern SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
199extern SR_PRIV struct sr_dev_driver va_va18b_driver_info;
200extern SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
201extern SR_PRIV struct sr_dev_driver metex_m4650cr_driver_info;
202extern SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
203extern SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
204extern SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
205extern SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
206extern SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
207extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
208extern SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
209extern SR_PRIV struct sr_dev_driver voltcraft_m4650cr_driver_info;
210extern SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
211extern SR_PRIV struct sr_dev_driver voltcraft_vc830_ser_driver_info;
212extern SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
213extern SR_PRIV struct sr_dev_driver uni_t_ut60a_ser_driver_info;
214extern SR_PRIV struct sr_dev_driver uni_t_ut60e_ser_driver_info;
215extern SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
216extern SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
217extern SR_PRIV struct sr_dev_driver iso_tech_idm103n_driver_info;
218#endif
219#ifdef HAVE_HW_UNI_T_DMM
220extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_driver_info;
221extern SR_PRIV struct sr_dev_driver uni_t_ut60a_driver_info;
222extern SR_PRIV struct sr_dev_driver uni_t_ut60e_driver_info;
223extern SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info;
224extern SR_PRIV struct sr_dev_driver uni_t_ut61e_driver_info;
225extern SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info;
226extern SR_PRIV struct sr_dev_driver voltcraft_vc830_driver_info;
227extern SR_PRIV struct sr_dev_driver voltcraft_vc840_driver_info;
228#endif
229/** @endcond */
230
231static struct sr_dev_driver *drivers_list[] = {
232#ifdef HAVE_HW_BRYMEN_DMM
233 &brymen_bm857_driver_info,
234#endif
235#ifdef HAVE_HW_CEM_DT_885X
236 &cem_dt_885x_driver_info,
237#endif
238#ifdef HAVE_HW_CENTER_3XX
239 &center_309_driver_info,
240 &voltcraft_k204_driver_info,
241#endif
242#ifdef HAVE_HW_COLEAD_SLM
243 &colead_slm_driver_info,
244#endif
245#ifdef HAVE_HW_DEMO
246 &demo_driver_info,
247#endif
248#ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
249 &ikalogic_scanalogic2_driver_info,
250#endif
251#ifdef HAVE_HW_IKALOGIC_SCANAPLUS
252 &ikalogic_scanaplus_driver_info,
253#endif
254#ifdef HAVE_HW_KECHENG_KC_330B
255 &kecheng_kc_330b_driver_info,
256#endif
257#ifdef HAVE_HW_LASCAR_EL_USB
258 &lascar_el_usb_driver_info,
259#endif
260#ifdef HAVE_HW_MIC_985XX
261 &mic_98581_driver_info,
262 &mic_98583_driver_info,
263#endif
264#ifdef HAVE_HW_NORMA_DMM
265 &norma_dmm_driver_info,
266#endif
267#ifdef HAVE_HW_OLS
268 &ols_driver_info,
269#endif
270#ifdef HAVE_HW_RIGOL_DS1XX2
271 &rigol_ds1xx2_driver_info,
272#endif
273#ifdef HAVE_HW_SALEAE_LOGIC16
274 &saleae_logic16_driver_info,
275#endif
276#ifdef HAVE_HW_TELEINFO
277 &teleinfo_driver_info,
278#endif
279#ifdef HAVE_HW_TONDAJ_SL_814
280 &tondaj_sl_814_driver_info,
281#endif
282#ifdef HAVE_HW_UNI_T_UT32X
283 &uni_t_ut32x_driver_info,
284#endif
285#ifdef HAVE_HW_VICTOR_DMM
286 &victor_dmm_driver_info,
287#endif
288#ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
289 &zeroplus_logic_cube_driver_info,
290#endif
291#ifdef HAVE_HW_ASIX_SIGMA
292 &asix_sigma_driver_info,
293#endif
294#ifdef HAVE_HW_CHRONOVU_LA8
295 &chronovu_la8_driver_info,
296#endif
297#ifdef HAVE_HW_LINK_MSO19
298 &link_mso19_driver_info,
299#endif
300#ifdef HAVE_HW_ALSA
301 &alsa_driver_info,
302#endif
303#ifdef HAVE_HW_FX2LAFW
304 &fx2lafw_driver_info,
305#endif
306#ifdef HAVE_HW_HANTEK_DSO
307 &hantek_dso_driver_info,
308#endif
309#ifdef HAVE_HW_AGILENT_DMM
310 &agdmm_driver_info,
311#endif
312#ifdef HAVE_HW_FLUKE_DMM
313 &flukedmm_driver_info,
314#endif
315#ifdef HAVE_HW_SERIAL_DMM
316 &digitek_dt4000zc_driver_info,
317 &tekpower_tp4000zc_driver_info,
318 &metex_me31_driver_info,
319 &peaktech_3410_driver_info,
320 &mastech_mas345_driver_info,
321 &va_va18b_driver_info,
322 &metex_m3640d_driver_info,
323 &metex_m4650cr_driver_info,
324 &peaktech_4370_driver_info,
325 &pce_pce_dm32_driver_info,
326 &radioshack_22_168_driver_info,
327 &radioshack_22_805_driver_info,
328 &radioshack_22_812_driver_info,
329 &tecpel_dmm_8061_ser_driver_info,
330 &voltcraft_m3650d_driver_info,
331 &voltcraft_m4650cr_driver_info,
332 &voltcraft_vc820_ser_driver_info,
333 &voltcraft_vc830_ser_driver_info,
334 &voltcraft_vc840_ser_driver_info,
335 &uni_t_ut60a_ser_driver_info,
336 &uni_t_ut60e_ser_driver_info,
337 &uni_t_ut61d_ser_driver_info,
338 &uni_t_ut61e_ser_driver_info,
339 &iso_tech_idm103n_driver_info,
340#endif
341#ifdef HAVE_HW_UNI_T_DMM
342 &tecpel_dmm_8061_driver_info,
343 &uni_t_ut60a_driver_info,
344 &uni_t_ut60e_driver_info,
345 &uni_t_ut61d_driver_info,
346 &uni_t_ut61e_driver_info,
347 &voltcraft_vc820_driver_info,
348 &voltcraft_vc830_driver_info,
349 &voltcraft_vc840_driver_info,
350#endif
351 NULL,
352};
353
354/**
355 * Return the list of supported hardware drivers.
356 *
357 * @return Pointer to the NULL-terminated list of hardware driver pointers.
358 */
359SR_API struct sr_dev_driver **sr_driver_list(void)
360{
361
362 return drivers_list;
363}
364
365/**
366 * Initialize a hardware driver.
367 *
368 * This usually involves memory allocations and variable initializations
369 * within the driver, but _not_ scanning for attached devices.
370 * The API call sr_driver_scan() is used for that.
371 *
372 * @param ctx A libsigrok context object allocated by a previous call to
373 * sr_init(). Must not be NULL.
374 * @param driver The driver to initialize. This must be a pointer to one of
375 * the entries returned by sr_driver_list(). Must not be NULL.
376 *
377 * @return SR_OK upon success, SR_ERR_ARG upon invalid parameters,
378 * SR_ERR_BUG upon internal errors, or another negative error code
379 * upon other errors.
380 */
381SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
382{
383 int ret;
384
385 if (!ctx) {
386 sr_err("Invalid libsigrok context, can't initialize.");
387 return SR_ERR_ARG;
388 }
389
390 if (!driver) {
391 sr_err("Invalid driver, can't initialize.");
392 return SR_ERR_ARG;
393 }
394
395 sr_spew("Initializing driver '%s'.", driver->name);
396 if ((ret = driver->init(ctx)) < 0)
397 sr_err("Failed to initialize the driver: %d.", ret);
398
399 return ret;
400}
401
402/**
403 * Tell a hardware driver to scan for devices.
404 *
405 * In addition to the detection, the devices that are found are also
406 * initialized automatically. On some devices, this involves a firmware upload,
407 * or other such measures.
408 *
409 * The order in which the system is scanned for devices is not specified. The
410 * caller should not assume or rely on any specific order.
411 *
412 * Before calling sr_driver_scan(), the user must have previously initialized
413 * the driver by calling sr_driver_init().
414 *
415 * @param driver The driver that should scan. This must be a pointer to one of
416 * the entries returned by sr_driver_list(). Must not be NULL.
417 * @param options A list of 'struct sr_hwopt' options to pass to the driver's
418 * scanner. Can be NULL/empty.
419 *
420 * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
421 * found (or errors were encountered). This list must be freed by the
422 * caller using g_slist_free(), but without freeing the data pointed
423 * to in the list.
424 */
425SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
426{
427 GSList *l;
428
429 if (!driver) {
430 sr_err("Invalid driver, can't scan for devices.");
431 return NULL;
432 }
433
434 if (!driver->priv) {
435 sr_err("Driver not initialized, can't scan for devices.");
436 return NULL;
437 }
438
439 l = driver->scan(options);
440
441 sr_spew("Scan of '%s' found %d devices.", driver->name,
442 g_slist_length(l));
443
444 return l;
445}
446
447/** @private */
448SR_PRIV void sr_hw_cleanup_all(void)
449{
450 int i;
451 struct sr_dev_driver **drivers;
452
453 drivers = sr_driver_list();
454 for (i = 0; drivers[i]; i++) {
455 if (drivers[i]->cleanup)
456 drivers[i]->cleanup();
457 }
458}
459
460/** A floating reference can be passed in for data.
461 * @private */
462SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data)
463{
464 struct sr_config *src;
465
466 if (!(src = g_try_malloc(sizeof(struct sr_config))))
467 return NULL;
468 src->key = key;
469 src->data = g_variant_ref_sink(data);
470
471 return src;
472}
473
474/** @private */
475SR_PRIV void sr_config_free(struct sr_config *src)
476{
477
478 if (!src || !src->data) {
479 sr_err("%s: invalid data!", __func__);
480 return;
481 }
482
483 g_variant_unref(src->data);
484 g_free(src);
485
486}
487
488/**
489 * Returns information about the given driver or device instance.
490 *
491 * @param driver The sr_dev_driver struct to query.
492 * @param key The configuration key (SR_CONF_*).
493 * @param data Pointer to a GVariant where the value will be stored. Must
494 * not be NULL. The caller is given ownership of the GVariant
495 * and must thus decrease the refcount after use. However if
496 * this function returns an error code, the field should be
497 * considered unused, and should not be unreferenced.
498 * @param sdi (optional) If the key is specific to a device, this must
499 * contain a pointer to the struct sr_dev_inst to be checked.
500 * Otherwise it must be NULL.
501 *
502 * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
503 * may be returned by the driver indicating it doesn't know that key,
504 * but this is not to be flagged as an error by the caller; merely
505 * as an indication that it's not applicable.
506 */
507SR_API int sr_config_get(const struct sr_dev_driver *driver, int key,
508 GVariant **data, const struct sr_dev_inst *sdi)
509{
510 int ret;
511
512 if (!driver || !data)
513 return SR_ERR;
514
515 if (!driver->config_get)
516 return SR_ERR_ARG;
517
518 if ((ret = driver->config_get(key, data, sdi)) == SR_OK) {
519 /* Got a floating reference from the driver. Sink it here,
520 * caller will need to unref when done with it. */
521 g_variant_ref_sink(*data);
522 }
523
524 return ret;
525}
526
527/**
528 * Set a configuration key in a device instance.
529 *
530 * @param sdi The device instance.
531 * @param key The configuration key (SR_CONF_*).
532 * @param data The new value for the key, as a GVariant with GVariantType
533 * appropriate to that key. A floating reference can be passed
534 * in; its refcount will be sunk and unreferenced after use.
535 *
536 * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
537 * may be returned by the driver indicating it doesn't know that key,
538 * but this is not to be flagged as an error by the caller; merely
539 * as an indication that it's not applicable.
540 */
541SR_API int sr_config_set(const struct sr_dev_inst *sdi, int key, GVariant *data)
542{
543 int ret;
544
545 g_variant_ref_sink(data);
546
547 if (!sdi || !sdi->driver || !data)
548 ret = SR_ERR;
549 else if (!sdi->driver->config_set)
550 ret = SR_ERR_ARG;
551 else
552 ret = sdi->driver->config_set(key, data, sdi);
553
554 g_variant_unref(data);
555
556 return ret;
557}
558
559/**
560 * List all possible values for a configuration key.
561 *
562 * @param driver The sr_dev_driver struct to query.
563 * @param key The configuration key (SR_CONF_*).
564 * @param data A pointer to a GVariant where the list will be stored. The
565 * caller is given ownership of the GVariant and must thus
566 * unref the GVariant after use. However if this function
567 * returns an error code, the field should be considered
568 * unused, and should not be unreferenced.
569 * @param sdi (optional) If the key is specific to a device, this must
570 * contain a pointer to the struct sr_dev_inst to be checked.
571 *
572 * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
573 * may be returned by the driver indicating it doesn't know that key,
574 * but this is not to be flagged as an error by the caller; merely
575 * as an indication that it's not applicable.
576 */
577SR_API int sr_config_list(const struct sr_dev_driver *driver, int key,
578 GVariant **data, const struct sr_dev_inst *sdi)
579{
580 int ret;
581
582 if (!driver || !data)
583 ret = SR_ERR;
584 else if (!driver->config_list)
585 ret = SR_ERR_ARG;
586 else if ((ret = driver->config_list(key, data, sdi)) == SR_OK)
587 g_variant_ref_sink(*data);
588
589 return ret;
590}
591
592/**
593 * Get information about a configuration key.
594 *
595 * @param key The configuration key.
596 *
597 * @return A pointer to a struct sr_config_info, or NULL if the key
598 * was not found.
599 */
600SR_API const struct sr_config_info *sr_config_info_get(int key)
601{
602 int i;
603
604 for (i = 0; sr_config_info_data[i].key; i++) {
605 if (sr_config_info_data[i].key == key)
606 return &sr_config_info_data[i];
607 }
608
609 return NULL;
610}
611
612/**
613 * Get information about an configuration key, by name.
614 *
615 * @param optname The configuration key.
616 *
617 * @return A pointer to a struct sr_config_info, or NULL if the key
618 * was not found.
619 */
620SR_API const struct sr_config_info *sr_config_info_name_get(const char *optname)
621{
622 int i;
623
624 for (i = 0; sr_config_info_data[i].key; i++) {
625 if (!strcmp(sr_config_info_data[i].id, optname))
626 return &sr_config_info_data[i];
627 }
628
629 return NULL;
630}
631
632/* Unnecessary level of indirection follows. */
633
634/** @private */
635SR_PRIV int sr_source_remove(int fd)
636{
637 return sr_session_source_remove(fd);
638}
639
640/** @private */
641SR_PRIV int sr_source_add(int fd, int events, int timeout,
642 sr_receive_data_callback_t cb, void *cb_data)
643{
644 return sr_session_source_add(fd, events, timeout, cb, cb_data);
645}
646
647/** @} */
Hardware access and backend lib