hwdriver.c

   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
  53 static 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_RLE, SR_T_BOOL, "rle",
  67                 "Run Length Encoding", NULL},
  68         {SR_CONF_TRIGGER_SLOPE, SR_T_UINT64, "triggerslope",
  69                 "Trigger slope", NULL},
  70         {SR_CONF_TRIGGER_SOURCE, SR_T_CHAR, "triggersource",
  71                 "Trigger source", NULL},
  72         {SR_CONF_HORIZ_TRIGGERPOS, SR_T_FLOAT, "horiz_triggerpos",
  73                 "Horizontal trigger position", NULL},
  74         {SR_CONF_BUFFERSIZE, SR_T_UINT64, "buffersize",
  75                 "Buffer size", NULL},
  76         {SR_CONF_TIMEBASE, SR_T_RATIONAL_PERIOD, "timebase",
  77                 "Time base", NULL},
  78         {SR_CONF_FILTER, SR_T_CHAR, "filter",
  79                 "Filter targets", NULL},
  80         {SR_CONF_VDIV, SR_T_RATIONAL_VOLT, "vdiv",
  81                 "Volts/div", NULL},
  82         {SR_CONF_COUPLING, SR_T_CHAR, "coupling",
  83                 "Coupling", NULL},
  84         {SR_CONF_DATALOG, SR_T_BOOL, "datalog",
  85                 "Datalog", NULL},
  86         {SR_CONF_SPL_WEIGHT_FREQ, SR_T_CHAR, "spl_weight_freq",
  87                 "Sound pressure level frequency weighting", NULL},
  88         {SR_CONF_SPL_WEIGHT_TIME, SR_T_CHAR, "spl_weight_time",
  89                 "Sound pressure level time weighting", NULL},
  90         {SR_CONF_HOLD_MAX, SR_T_BOOL, "hold_max",
  91                 "Hold max", NULL},
  92         {SR_CONF_HOLD_MIN, SR_T_BOOL, "hold_min",
  93                 "Hold min", NULL},
  94         {SR_CONF_SPL_MEASUREMENT_RANGE, SR_T_UINT64_RANGE, "spl_meas_range",
  95                 "Sound pressure level measurement range", NULL},
  96         {SR_CONF_POWER_OFF, SR_T_BOOL, "power_off",
  97                 "Power off", NULL},
  98         {0, 0, NULL, NULL, NULL},
  99 };
 100
 101 /** @cond PRIVATE */
 102 #ifdef HAVE_HW_BRYMEN_DMM
 103 extern SR_PRIV struct sr_dev_driver brymen_bm857_driver_info;
 104 #endif
 105 #ifdef HAVE_HW_CEM_DT_885X
 106 extern SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info;
 107 #endif
 108 #ifdef HAVE_HW_COLEAD_SLM
 109 extern SR_PRIV struct sr_dev_driver colead_slm_driver_info;
 110 #endif
 111 #ifdef HAVE_HW_DEMO
 112 extern SR_PRIV struct sr_dev_driver demo_driver_info;
 113 #endif
 114 #ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
 115 extern SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
 116 #endif
 117 #ifdef HAVE_HW_LASCAR_EL_USB
 118 extern SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
 119 #endif
 120 #ifdef HAVE_HW_MIC_985XX
 121 extern SR_PRIV struct sr_dev_driver mic_98581_driver_info;
 122 extern SR_PRIV struct sr_dev_driver mic_98583_driver_info;
 123 #endif
 124 #ifdef HAVE_HW_NEXUS_OSCIPRIME
 125 extern SR_PRIV struct sr_dev_driver nexus_osciprime_driver_info;
 126 #endif
 127 #ifdef HAVE_HW_OLS
 128 extern SR_PRIV struct sr_dev_driver ols_driver_info;
 129 #endif
 130 #ifdef HAVE_HW_RIGOL_DS1XX2
 131 extern SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
 132 #endif
 133 #ifdef HAVE_HW_TONDAJ_SL_814
 134 extern SR_PRIV struct sr_dev_driver tondaj_sl_814_driver_info;
 135 #endif
 136 #ifdef HAVE_HW_VICTOR_DMM
 137 extern SR_PRIV struct sr_dev_driver victor_dmm_driver_info;
 138 #endif
 139 #ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
 140 extern SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
 141 #endif
 142 #ifdef HAVE_HW_ASIX_SIGMA
 143 extern SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
 144 #endif
 145 #ifdef HAVE_HW_CHRONOVU_LA8
 146 extern SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
 147 #endif
 148 #ifdef HAVE_HW_LINK_MSO19
 149 extern SR_PRIV struct sr_dev_driver link_mso19_driver_info;
 150 #endif
 151 #ifdef HAVE_HW_ALSA
 152 extern SR_PRIV struct sr_dev_driver alsa_driver_info;
 153 #endif
 154 #ifdef HAVE_HW_FX2LAFW
 155 extern SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
 156 #endif
 157 #ifdef HAVE_HW_HANTEK_DSO
 158 extern SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
 159 #endif
 160 #ifdef HAVE_HW_AGILENT_DMM
 161 extern SR_PRIV struct sr_dev_driver agdmm_driver_info;
 162 #endif
 163 #ifdef HAVE_HW_FLUKE_DMM
 164 extern SR_PRIV struct sr_dev_driver flukedmm_driver_info;
 165 #endif
 166 #ifdef HAVE_HW_SERIAL_DMM
 167 extern SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
 168 extern SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
 169 extern SR_PRIV struct sr_dev_driver metex_me31_driver_info;
 170 extern SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
 171 extern SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
 172 extern SR_PRIV struct sr_dev_driver va_va18b_driver_info;
 173 extern SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
 174 extern SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
 175 extern SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
 176 extern SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
 177 extern SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
 178 extern SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
 179 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8060_ser_driver_info;
 180 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
 181 extern SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
 182 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
 183 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
 184 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
 185 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
 186 #endif
 187 #ifdef HAVE_HW_UNI_T_DMM
 188 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8060_driver_info;
 189 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_driver_info;
 190 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info;
 191 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_driver_info;
 192 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info;
 193 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_driver_info;
 194 #endif
 195 /** @endcond */
 196
 197 static struct sr_dev_driver *drivers_list[] = {
 198 #ifdef HAVE_HW_BRYMEN_DMM
 199         &brymen_bm857_driver_info,
 200 #endif
 201 #ifdef HAVE_HW_CEM_DT_885X
 202         &cem_dt_885x_driver_info,
 203 #endif
 204 #ifdef HAVE_HW_COLEAD_SLM
 205         &colead_slm_driver_info,
 206 #endif
 207 #ifdef HAVE_HW_DEMO
 208         &demo_driver_info,
 209 #endif
 210 #ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
 211         &ikalogic_scanalogic2_driver_info,
 212 #endif
 213 #ifdef HAVE_HW_LASCAR_EL_USB
 214         &lascar_el_usb_driver_info,
 215 #endif
 216 #ifdef HAVE_HW_MIC_985XX
 217         &mic_98581_driver_info,
 218         &mic_98583_driver_info,
 219 #endif
 220 #ifdef HAVE_HW_NEXUS_OSCIPRIME
 221         &nexus_osciprime_driver_info,
 222 #endif
 223 #ifdef HAVE_HW_OLS
 224         &ols_driver_info,
 225 #endif
 226 #ifdef HAVE_HW_RIGOL_DS1XX2
 227         &rigol_ds1xx2_driver_info,
 228 #endif
 229 #ifdef HAVE_HW_TONDAJ_SL_814
 230         &tondaj_sl_814_driver_info,
 231 #endif
 232 #ifdef HAVE_HW_VICTOR_DMM
 233         &victor_dmm_driver_info,
 234 #endif
 235 #ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
 236         &zeroplus_logic_cube_driver_info,
 237 #endif
 238 #ifdef HAVE_HW_ASIX_SIGMA
 239         &asix_sigma_driver_info,
 240 #endif
 241 #ifdef HAVE_HW_CHRONOVU_LA8
 242         &chronovu_la8_driver_info,
 243 #endif
 244 #ifdef HAVE_HW_LINK_MSO19
 245         &link_mso19_driver_info,
 246 #endif
 247 #ifdef HAVE_HW_ALSA
 248         &alsa_driver_info,
 249 #endif
 250 #ifdef HAVE_HW_FX2LAFW
 251         &fx2lafw_driver_info,
 252 #endif
 253 #ifdef HAVE_HW_HANTEK_DSO
 254         &hantek_dso_driver_info,
 255 #endif
 256 #ifdef HAVE_HW_AGILENT_DMM
 257         &agdmm_driver_info,
 258 #endif
 259 #ifdef HAVE_HW_FLUKE_DMM
 260         &flukedmm_driver_info,
 261 #endif
 262 #ifdef HAVE_HW_SERIAL_DMM
 263         &digitek_dt4000zc_driver_info,
 264         &tekpower_tp4000zc_driver_info,
 265         &metex_me31_driver_info,
 266         &peaktech_3410_driver_info,
 267         &mastech_mas345_driver_info,
 268         &va_va18b_driver_info,
 269         &metex_m3640d_driver_info,
 270         &peaktech_4370_driver_info,
 271         &pce_pce_dm32_driver_info,
 272         &radioshack_22_168_driver_info,
 273         &radioshack_22_805_driver_info,
 274         &radioshack_22_812_driver_info,
 275         &tecpel_dmm_8060_ser_driver_info,
 276         &tecpel_dmm_8061_ser_driver_info,
 277         &voltcraft_m3650d_driver_info,
 278         &voltcraft_vc820_ser_driver_info,
 279         &voltcraft_vc840_ser_driver_info,
 280         &uni_t_ut61d_ser_driver_info,
 281         &uni_t_ut61e_ser_driver_info,
 282 #endif
 283 #ifdef HAVE_HW_UNI_T_DMM
 284         &tecpel_dmm_8060_driver_info,
 285         &tecpel_dmm_8061_driver_info,
 286         &uni_t_ut61d_driver_info,
 287         &uni_t_ut61e_driver_info,
 288         &voltcraft_vc820_driver_info,
 289         &voltcraft_vc840_driver_info,
 290 #endif
 291         NULL,
 292 };
 293
 294 /**
 295  * Return the list of supported hardware drivers.
 296  *
 297  * @return Pointer to the NULL-terminated list of hardware driver pointers.
 298  */
 299 SR_API struct sr_dev_driver **sr_driver_list(void)
 300 {
 301
 302         return drivers_list;
 303 }
 304
 305 /**
 306  * Initialize a hardware driver.
 307  *
 308  * This usually involves memory allocations and variable initializations
 309  * within the driver, but _not_ scanning for attached devices.
 310  * The API call sr_driver_scan() is used for that.
 311  *
 312  * @param ctx A libsigrok context object allocated by a previous call to
 313  *            sr_init(). Must not be NULL.
 314  * @param driver The driver to initialize. This must be a pointer to one of
 315  *               the entries returned by sr_driver_list(). Must not be NULL.
 316  *
 317  * @return SR_OK upon success, SR_ERR_ARG upon invalid parameters,
 318  *         SR_ERR_BUG upon internal errors, or another negative error code
 319  *         upon other errors.
 320  */
 321 SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
 322 {
 323         int ret;
 324
 325         if (!ctx) {
 326                 sr_err("Invalid libsigrok context, can't initialize.");
 327                 return SR_ERR_ARG;
 328         }
 329
 330         if (!driver) {
 331                 sr_err("Invalid driver, can't initialize.");
 332                 return SR_ERR_ARG;
 333         }
 334
 335         sr_spew("Initializing driver '%s'.", driver->name);
 336         if ((ret = driver->init(ctx)) < 0)
 337                 sr_err("Failed to initialize the driver: %d.", ret);
 338
 339         return ret;
 340 }
 341
 342 /**
 343  * Tell a hardware driver to scan for devices.
 344  *
 345  * In addition to the detection, the devices that are found are also
 346  * initialized automatically. On some devices, this involves a firmware upload,
 347  * or other such measures.
 348  *
 349  * The order in which the system is scanned for devices is not specified. The
 350  * caller should not assume or rely on any specific order.
 351  *
 352  * Before calling sr_driver_scan(), the user must have previously initialized
 353  * the driver by calling sr_driver_init().
 354  *
 355  * @param driver The driver that should scan. This must be a pointer to one of
 356  *               the entries returned by sr_driver_list(). Must not be NULL.
 357  * @param options A list of 'struct sr_hwopt' options to pass to the driver's
 358  *                scanner. Can be NULL/empty.
 359  *
 360  * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
 361  *         found (or errors were encountered). This list must be freed by the
 362  *         caller using g_slist_free(), but without freeing the data pointed
 363  *         to in the list.
 364  */
 365 SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
 366 {
 367         GSList *l;
 368
 369         if (!driver) {
 370                 sr_err("Invalid driver, can't scan for devices.");
 371                 return NULL;
 372         }
 373
 374         if (!driver->priv) {
 375                 sr_err("Driver not initialized, can't scan for devices.");
 376                 return NULL;
 377         }
 378
 379         l = driver->scan(options);
 380
 381         sr_spew("Scan of '%s' found %d devices.", driver->name,
 382                 g_slist_length(l));
 383
 384         return l;
 385 }
 386
 387 /** @private */
 388 SR_PRIV void sr_hw_cleanup_all(void)
 389 {
 390         int i;
 391         struct sr_dev_driver **drivers;
 392
 393         drivers = sr_driver_list();
 394         for (i = 0; drivers[i]; i++) {
 395                 if (drivers[i]->cleanup)
 396                         drivers[i]->cleanup();
 397         }
 398 }
 399
 400 /** A floating reference can be passed in for data. */
 401 SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data)
 402 {
 403         struct sr_config *src;
 404
 405         if (!(src = g_try_malloc(sizeof(struct sr_config))))
 406                 return NULL;
 407         src->key = key;
 408         src->data = g_variant_ref_sink(data);
 409
 410         return src;
 411 }
 412
 413 SR_PRIV void sr_config_free(struct sr_config *src)
 414 {
 415
 416         if (!src || !src->data) {
 417                 sr_err("%s: invalid data!", __func__);
 418                 return;
 419         }
 420
 421         g_variant_unref(src->data);
 422         g_free(src);
 423
 424 }
 425
 426 /**
 427  * Returns information about the given driver or device instance.
 428  *
 429  * @param driver The sr_dev_driver struct to query.
 430  * @param key The configuration key (SR_CONF_*).
 431  * @param data Pointer to a GVariant where the value will be stored. Must
 432  *             not be NULL. The caller is given ownership of the GVariant
 433  *             and must thus decrease the refcount after use. However if
 434  *             this function returns an error code, the field should be
 435  *             considered unused, and should not be unreferenced.
 436  * @param sdi (optional) If the key is specific to a device, this must
 437  *            contain a pointer to the struct sr_dev_inst to be checked.
 438  *            Otherwise it must be NULL.
 439  *
 440  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 441  *         may be returned by the driver indicating it doesn't know that key,
 442  *         but this is not to be flagged as an error by the caller; merely
 443  *         as an indication that it's not applicable.
 444  */
 445 SR_API int sr_config_get(const struct sr_dev_driver *driver, int key,
 446                 GVariant **data, const struct sr_dev_inst *sdi)
 447 {
 448         int ret;
 449
 450         if (!driver || !data)
 451                 return SR_ERR;
 452
 453         if (!driver->config_get)
 454                 return SR_ERR_ARG;
 455
 456         if ((ret = driver->config_get(key, data, sdi)) == SR_OK) {
 457                 /* Got a floating reference from the driver. Sink it here,
 458                  * caller will need to unref when done with it. */
 459                 g_variant_ref_sink(*data);
 460         }
 461
 462         return ret;
 463 }
 464
 465 /**
 466  * Set a configuration key in a device instance.
 467  *
 468  * @param sdi The device instance.
 469  * @param key The configuration key (SR_CONF_*).
 470  * @param data The new value for the key, as a GVariant with GVariantType
 471  *        appropriate to that key. A floating reference can be passed
 472  *        in; its refcount will be sunk and unreferenced after use.
 473  *
 474  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 475  *         may be returned by the driver indicating it doesn't know that key,
 476  *         but this is not to be flagged as an error by the caller; merely
 477  *         as an indication that it's not applicable.
 478  */
 479 SR_API int sr_config_set(const struct sr_dev_inst *sdi, int key, GVariant *data)
 480 {
 481         int ret;
 482
 483         g_variant_ref_sink(data);
 484
 485         if (!sdi || !sdi->driver || !data)
 486                 ret = SR_ERR;
 487         else if (!sdi->driver->config_set)
 488                 ret = SR_ERR_ARG;
 489         else
 490                 ret = sdi->driver->config_set(key, data, sdi);
 491
 492         g_variant_unref(data);
 493
 494         return ret;
 495 }
 496
 497 /**
 498  * List all possible values for a configuration key.
 499  *
 500  * @param driver The sr_dev_driver struct to query.
 501  * @param key The configuration key (SR_CONF_*).
 502  * @param data A pointer to a GVariant where the list will be stored. The
 503  *             caller is given ownership of the GVariant and must thus
 504  *             unref the GVariant after use. However if this function
 505  *             returns an error code, the field should be considered
 506  *             unused, and should not be unreferenced.
 507  * @param sdi (optional) If the key is specific to a device, this must
 508  *            contain a pointer to the struct sr_dev_inst to be checked.
 509  *
 510  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 511  *         may be returned by the driver indicating it doesn't know that key,
 512  *         but this is not to be flagged as an error by the caller; merely
 513  *         as an indication that it's not applicable.
 514  */
 515 SR_API int sr_config_list(const struct sr_dev_driver *driver, int key,
 516                 GVariant **data, const struct sr_dev_inst *sdi)
 517 {
 518         int ret;
 519
 520         if (!driver || !data)
 521                 ret = SR_ERR;
 522         else if (!driver->config_list)
 523                 ret = SR_ERR_ARG;
 524         else if ((ret = driver->config_list(key, data, sdi)) == SR_OK)
 525                 g_variant_ref_sink(*data);
 526
 527         return ret;
 528 }
 529
 530 /**
 531  * Get information about a configuration key.
 532  *
 533  * @param key The configuration key.
 534  *
 535  * @return A pointer to a struct sr_config_info, or NULL if the key
 536  *         was not found.
 537  */
 538 SR_API const struct sr_config_info *sr_config_info_get(int key)
 539 {
 540         int i;
 541
 542         for (i = 0; sr_config_info_data[i].key; i++) {
 543                 if (sr_config_info_data[i].key == key)
 544                         return &sr_config_info_data[i];
 545         }
 546
 547         return NULL;
 548 }
 549
 550 /**
 551  * Get information about an configuration key, by name.
 552  *
 553  * @param optname The configuration key.
 554  *
 555  * @return A pointer to a struct sr_config_info, or NULL if the key
 556  *         was not found.
 557  */
 558 SR_API const struct sr_config_info *sr_config_info_name_get(const char *optname)
 559 {
 560         int i;
 561
 562         for (i = 0; sr_config_info_data[i].key; i++) {
 563                 if (!strcmp(sr_config_info_data[i].id, optname))
 564                         return &sr_config_info_data[i];
 565         }
 566
 567         return NULL;
 568 }
 569
 570 /* Unnecessary level of indirection follows. */
 571
 572 /** @private */
 573 SR_PRIV int sr_source_remove(int fd)
 574 {
 575         return sr_session_source_remove(fd);
 576 }
 577
 578 /** @private */
 579 SR_PRIV int sr_source_add(int fd, int events, int timeout,
 580                           sr_receive_data_callback_t cb, void *cb_data)
 581 {
 582         return sr_session_source_add(fd, events, timeout, cb, cb_data);
 583 }
 584
 585 /** @} */