src/hardware/yokogawa-dlm/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 abraxa (Soeren Apel) <soeren@apelpie.net>
   5  * Based on the Hameg HMO driver by poljar (Damir Jelić) <poljarinho@gmail.com>
   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 <stdlib.h>
  22 #include "protocol.h"
  23
  24 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info;
  25
  26 static char *MANUFACTURER_ID = "YOKOGAWA";
  27 static char *MANUFACTURER_NAME = "Yokogawa";
  28
  29 static const uint32_t drvopts[] = {
  30         SR_CONF_LOGIC_ANALYZER,
  31         SR_CONF_OSCILLOSCOPE,
  32 };
  33
  34 enum {
  35         CG_INVALID = -1,
  36         CG_NONE,
  37         CG_ANALOG,
  38         CG_DIGITAL,
  39 };
  40
  41 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  42 {
  43         return std_init(sr_ctx, di, LOG_PREFIX);
  44 }
  45
  46 static struct sr_dev_inst *probe_usbtmc_device(struct sr_scpi_dev_inst *scpi)
  47 {
  48         struct sr_dev_inst *sdi;
  49         struct dev_context *devc;
  50         struct sr_scpi_hw_info *hw_info;
  51         char *model_name;
  52         int model_index;
  53
  54         sdi = NULL;
  55         devc = NULL;
  56         hw_info = NULL;
  57
  58         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  59                 sr_info("Couldn't get IDN response.");
  60                 goto fail;
  61         }
  62
  63         if (strcmp(hw_info->manufacturer, MANUFACTURER_ID) != 0)
  64                 goto fail;
  65
  66         if (dlm_model_get(hw_info->model, &model_name, &model_index) != SR_OK)
  67                 goto fail;
  68
  69         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  70         sdi->status = SR_ST_ACTIVE;
  71         sdi->vendor = g_strdup(MANUFACTURER_NAME);
  72         sdi->model = g_strdup(model_name);
  73         sdi->version = g_strdup(hw_info->firmware_version);
  74
  75         sdi->serial_num = g_strdup(hw_info->serial_number);
  76
  77         sr_scpi_hw_info_free(hw_info);
  78         hw_info = NULL;
  79
  80         devc = g_malloc0(sizeof(struct dev_context));
  81
  82         sdi->driver = &yokogawa_dlm_driver_info;
  83         sdi->priv = devc;
  84         sdi->inst_type = SR_INST_SCPI;
  85         sdi->conn = scpi;
  86
  87         if (dlm_device_init(sdi, model_index) != SR_OK)
  88                 goto fail;
  89
  90         sr_scpi_close(sdi->conn);
  91
  92         sdi->status = SR_ST_INACTIVE;
  93         return sdi;
  94
  95 fail:
  96         if (hw_info)
  97                 sr_scpi_hw_info_free(hw_info);
  98         if (sdi)
  99                 sr_dev_inst_free(sdi);
 100         if (devc)
 101                 g_free(devc);
 102
 103         return NULL;
 104 }
 105
 106 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 107 {
 108         return sr_scpi_scan(di->priv, options, probe_usbtmc_device);
 109 }
 110
 111 static GSList *dev_list(const struct sr_dev_driver *di)
 112 {
 113         return ((struct drv_context *)(di->priv))->instances;
 114 }
 115
 116 static void clear_helper(void *priv)
 117 {
 118         struct dev_context *devc;
 119
 120         devc = priv;
 121
 122         dlm_scope_state_destroy(devc->model_state);
 123
 124         g_free(devc->analog_groups);
 125         g_free(devc->digital_groups);
 126         g_free(devc);
 127 }
 128
 129 static int dev_clear(const struct sr_dev_driver *di)
 130 {
 131         return std_dev_clear(di, clear_helper);
 132 }
 133
 134 static int dev_open(struct sr_dev_inst *sdi)
 135 {
 136         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 137                 return SR_ERR;
 138
 139         if (dlm_scope_state_query(sdi) != SR_OK)
 140                 return SR_ERR;
 141
 142         sdi->status = SR_ST_ACTIVE;
 143
 144         return SR_OK;
 145 }
 146
 147 static int dev_close(struct sr_dev_inst *sdi)
 148 {
 149         if (sdi->status == SR_ST_INACTIVE)
 150                 return SR_OK;
 151
 152         sr_scpi_close(sdi->conn);
 153
 154         sdi->status = SR_ST_INACTIVE;
 155
 156         return SR_OK;
 157 }
 158
 159 static int cleanup(const struct sr_dev_driver *di)
 160 {
 161         dev_clear(di);
 162
 163         return SR_OK;
 164 }
 165
 166 /**
 167  * Check which category a given channel group belongs to.
 168  *
 169  * @param devc Our internal device context.
 170  * @param cg   The channel group to check.
 171  *
 172  * @retval CG_NONE    cg is NULL
 173  * @retval CG_ANALOG  cg is an analog group
 174  * @retval CG_DIGITAL cg is a digital group
 175  * @retval CG_INVALID cg is something else
 176  */
 177 static int check_channel_group(struct dev_context *devc,
 178                         const struct sr_channel_group *cg)
 179 {
 180         unsigned int i;
 181         struct scope_config *model;
 182
 183         model = devc->model_config;
 184
 185         if (!cg)
 186                 return CG_NONE;
 187
 188         for (i = 0; i < model->analog_channels; ++i)
 189                 if (cg == devc->analog_groups[i])
 190                         return CG_ANALOG;
 191
 192         for (i = 0; i < model->pods; ++i)
 193                 if (cg == devc->digital_groups[i])
 194                         return CG_DIGITAL;
 195
 196         sr_err("Invalid channel group specified.");
 197         return CG_INVALID;
 198 }
 199
 200 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 201                 const struct sr_channel_group *cg)
 202 {
 203         int ret, cg_type;
 204         unsigned int i;
 205         struct dev_context *devc;
 206         struct scope_config *model;
 207         struct scope_state *state;
 208
 209         if (!sdi || !(devc = sdi->priv))
 210                 return SR_ERR_ARG;
 211
 212         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 213                 return SR_ERR;
 214
 215         ret = SR_ERR_NA;
 216         model = devc->model_config;
 217         state = devc->model_state;
 218
 219         switch (key) {
 220         case SR_CONF_NUM_HDIV:
 221                 *data = g_variant_new_int32(model->num_xdivs);
 222                 ret = SR_OK;
 223                 break;
 224         case SR_CONF_TIMEBASE:
 225                 *data = g_variant_new("(tt)",
 226                                 (*model->timebases)[state->timebase][0],
 227                                 (*model->timebases)[state->timebase][1]);
 228                 ret = SR_OK;
 229                 break;
 230         case SR_CONF_NUM_VDIV:
 231                 if (cg_type == CG_NONE) {
 232                         sr_err("No channel group specified.");
 233                         return SR_ERR_CHANNEL_GROUP;
 234                 } else if (cg_type == CG_ANALOG) {
 235                                 *data = g_variant_new_int32(model->num_ydivs);
 236                                 ret = SR_OK;
 237                                 break;
 238                 } else {
 239                         ret = SR_ERR_NA;
 240                 }
 241                 break;
 242         case SR_CONF_VDIV:
 243                 ret = SR_ERR_NA;
 244                 if (cg_type == CG_NONE) {
 245                         sr_err("No channel group specified.");
 246                         return SR_ERR_CHANNEL_GROUP;
 247                 } else if (cg_type != CG_ANALOG)
 248                         break;
 249
 250                 for (i = 0; i < model->analog_channels; ++i) {
 251                         if (cg != devc->analog_groups[i])
 252                                 continue;
 253                         *data = g_variant_new("(tt)",
 254                                         (*model->vdivs)[state->analog_states[i].vdiv][0],
 255                                         (*model->vdivs)[state->analog_states[i].vdiv][1]);
 256                         ret = SR_OK;
 257                         break;
 258                 }
 259                 break;
 260         case SR_CONF_TRIGGER_SOURCE:
 261                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 262                 ret = SR_OK;
 263                 break;
 264         case SR_CONF_TRIGGER_SLOPE:
 265                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 266                 ret = SR_OK;
 267                 break;
 268         case SR_CONF_HORIZ_TRIGGERPOS:
 269                 *data = g_variant_new_double(state->horiz_triggerpos);
 270                 ret = SR_OK;
 271                 break;
 272         case SR_CONF_COUPLING:
 273                 ret = SR_ERR_NA;
 274                 if (cg_type == CG_NONE) {
 275                         sr_err("No channel group specified.");
 276                         return SR_ERR_CHANNEL_GROUP;
 277                 } else if (cg_type != CG_ANALOG)
 278                         break;
 279
 280                 for (i = 0; i < model->analog_channels; ++i) {
 281                         if (cg != devc->analog_groups[i])
 282                                 continue;
 283                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 284                         ret = SR_OK;
 285                         break;
 286                 }
 287                 break;
 288         case SR_CONF_SAMPLERATE:
 289                 *data = g_variant_new_uint64(state->sample_rate);
 290                 ret = SR_OK;
 291                 break;
 292         default:
 293                 ret = SR_ERR_NA;
 294         }
 295
 296         return ret;
 297 }
 298
 299 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 300 {
 301         unsigned int i;
 302         GVariant *rational[2];
 303         GVariantBuilder gvb;
 304
 305         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 306
 307         for (i = 0; i < n; i++) {
 308                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 309                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 310
 311                 /* FIXME: Valgrind reports a memory leak here. */
 312                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 313         }
 314
 315         return g_variant_builder_end(&gvb);
 316 }
 317
 318 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 319                 const struct sr_channel_group *cg)
 320 {
 321         int ret, cg_type;
 322         unsigned int i, j;
 323         char float_str[30];
 324         struct dev_context *devc;
 325         struct scope_config *model;
 326         struct scope_state *state;
 327         const char *tmp;
 328         uint64_t p, q;
 329         double tmp_d;
 330         gboolean update_sample_rate;
 331
 332         if (!sdi || !(devc = sdi->priv))
 333                 return SR_ERR_ARG;
 334
 335         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 336                 return SR_ERR;
 337
 338         model = devc->model_config;
 339         state = devc->model_state;
 340         update_sample_rate = FALSE;
 341
 342         ret = SR_ERR_NA;
 343
 344         switch (key) {
 345         case SR_CONF_LIMIT_FRAMES:
 346                 devc->frame_limit = g_variant_get_uint64(data);
 347                 ret = SR_OK;
 348                 break;
 349         case SR_CONF_TRIGGER_SOURCE:
 350                 tmp = g_variant_get_string(data, NULL);
 351                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 352                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 353                                 continue;
 354                         state->trigger_source = i;
 355                         /* TODO: A and B trigger support possible? */
 356                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 357                         break;
 358                 }
 359                 break;
 360         case SR_CONF_VDIV:
 361                 if (cg_type == CG_NONE) {
 362                         sr_err("No channel group specified.");
 363                         return SR_ERR_CHANNEL_GROUP;
 364                 }
 365
 366                 g_variant_get(data, "(tt)", &p, &q);
 367
 368                 for (i = 0; i < model->num_vdivs; i++) {
 369                         if (p != (*model->vdivs)[i][0] ||
 370                                         q != (*model->vdivs)[i][1])
 371                                 continue;
 372                         for (j = 1; j <= model->analog_channels; ++j) {
 373                                 if (cg != devc->analog_groups[j - 1])
 374                                         continue;
 375                                 state->analog_states[j - 1].vdiv = i;
 376                                 g_ascii_formatd(float_str, sizeof(float_str),
 377                                                 "%E", (float) p / q);
 378                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 379                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 380                                         return SR_ERR;
 381
 382                                 break;
 383                         }
 384
 385                         ret = SR_OK;
 386                         break;
 387                 }
 388                 break;
 389         case SR_CONF_TIMEBASE:
 390                 g_variant_get(data, "(tt)", &p, &q);
 391
 392                 for (i = 0; i < model->num_timebases; i++) {
 393                         if (p != (*model->timebases)[i][0] ||
 394                                         q != (*model->timebases)[i][1])
 395                                 continue;
 396                         state->timebase = i;
 397                         g_ascii_formatd(float_str, sizeof(float_str),
 398                                         "%E", (float) p / q);
 399                         ret = dlm_timebase_set(sdi->conn, float_str);
 400                         update_sample_rate = TRUE;
 401                         break;
 402                 }
 403                 break;
 404         case SR_CONF_HORIZ_TRIGGERPOS:
 405                 tmp_d = g_variant_get_double(data);
 406
 407                 /* TODO: Check if the calculation makes sense for the DLM. */
 408                 if (tmp_d < 0.0 || tmp_d > 1.0)
 409                         return SR_ERR;
 410
 411                 state->horiz_triggerpos = tmp_d;
 412                 tmp_d = -(tmp_d - 0.5) *
 413                                 ((double) (*model->timebases)[state->timebase][0] /
 414                                 (*model->timebases)[state->timebase][1])
 415                                 * model->num_xdivs;
 416
 417                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 418                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 419                 break;
 420         case SR_CONF_TRIGGER_SLOPE:
 421                 tmp = g_variant_get_string(data, NULL);
 422
 423                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 424                         return SR_ERR_ARG;
 425
 426                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 427                 state->trigger_slope = (tmp[0] == 'r') ?
 428                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 429
 430                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 431                 break;
 432         case SR_CONF_COUPLING:
 433                 if (cg_type == CG_NONE) {
 434                         sr_err("No channel group specified.");
 435                         return SR_ERR_CHANNEL_GROUP;
 436                 }
 437
 438                 tmp = g_variant_get_string(data, NULL);
 439
 440                 for (i = 0; (*model->coupling_options)[i]; i++) {
 441                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 442                                 continue;
 443                         for (j = 1; j <= model->analog_channels; ++j) {
 444                                 if (cg != devc->analog_groups[j - 1])
 445                                         continue;
 446                                 state->analog_states[j-1].coupling = i;
 447
 448                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 449                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 450                                         return SR_ERR;
 451                                 break;
 452                         }
 453
 454                         ret = SR_OK;
 455                         break;
 456                 }
 457                 break;
 458         default:
 459                 ret = SR_ERR_NA;
 460                 break;
 461         }
 462
 463         if (ret == SR_OK)
 464                 ret = sr_scpi_get_opc(sdi->conn);
 465
 466         if (ret == SR_OK && update_sample_rate)
 467                 ret = dlm_sample_rate_query(sdi);
 468
 469         return ret;
 470 }
 471
 472 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 473                 const struct sr_channel_group *cg)
 474 {
 475         int cg_type = CG_NONE;
 476         struct dev_context *devc = NULL;
 477         struct scope_config *model = NULL;
 478
 479         if (sdi && (devc = sdi->priv)) {
 480                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 481                         return SR_ERR;
 482
 483                 model = devc->model_config;
 484         }
 485
 486         switch (key) {
 487         case SR_CONF_DEVICE_OPTIONS:
 488                 if (cg_type == CG_NONE) {
 489                         if (model)
 490                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 491                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 492                         else
 493                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 494                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 495                 } else if (cg_type == CG_ANALOG) {
 496                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 497                                 model->analog_devopts, model->num_analog_devopts, sizeof(uint32_t));
 498                 } else {
 499                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 500                                 NULL, 0, sizeof(uint32_t));
 501                 }
 502                 break;
 503         case SR_CONF_COUPLING:
 504                 if (cg_type == CG_NONE)
 505                         return SR_ERR_CHANNEL_GROUP;
 506                 *data = g_variant_new_strv(*model->coupling_options,
 507                                 g_strv_length((char **)*model->coupling_options));
 508                 break;
 509         case SR_CONF_TRIGGER_SOURCE:
 510                 if (!model)
 511                         return SR_ERR_ARG;
 512                 *data = g_variant_new_strv(*model->trigger_sources,
 513                                 g_strv_length((char **)*model->trigger_sources));
 514                 break;
 515         case SR_CONF_TRIGGER_SLOPE:
 516                 if (!model)
 517                         return SR_ERR_ARG;
 518                 *data = g_variant_new_strv(*model->trigger_slopes,
 519                                 g_strv_length((char **)*model->trigger_slopes));
 520                 break;
 521         case SR_CONF_TIMEBASE:
 522                 if (!model)
 523                         return SR_ERR_ARG;
 524                 *data = build_tuples(model->timebases, model->num_timebases);
 525                 break;
 526         case SR_CONF_VDIV:
 527                 if (cg_type == CG_NONE)
 528                         return SR_ERR_CHANNEL_GROUP;
 529                 *data = build_tuples(model->vdivs, model->num_vdivs);
 530                 break;
 531         default:
 532                 return SR_ERR_NA;
 533         }
 534
 535         return SR_OK;
 536 }
 537
 538 static int dlm_check_channels(GSList *channels)
 539 {
 540         GSList *l;
 541         struct sr_channel *ch;
 542         gboolean enabled_pod1, enabled_chan4;
 543
 544         enabled_pod1 = enabled_chan4 = FALSE;
 545
 546         /* Note: On the DLM2000, CH4 and Logic are shared. */
 547         /* TODO Handle non-DLM2000 models. */
 548         for (l = channels; l; l = l->next) {
 549                 ch = l->data;
 550                 switch (ch->type) {
 551                 case SR_CHANNEL_ANALOG:
 552                         if (ch->index == 3)
 553                                 enabled_chan4 = TRUE;
 554                         break;
 555                 case SR_CHANNEL_LOGIC:
 556                         enabled_pod1 = TRUE;
 557                         break;
 558                 default:
 559                         return SR_ERR;
 560                 }
 561         }
 562
 563         if (enabled_pod1 && enabled_chan4)
 564                 return SR_ERR;
 565
 566         return SR_OK;
 567 }
 568
 569 static int dlm_setup_channels(const struct sr_dev_inst *sdi)
 570 {
 571         GSList *l;
 572         unsigned int i;
 573         gboolean *pod_enabled, setup_changed;
 574         struct scope_state *state;
 575         struct scope_config *model;
 576         struct sr_channel *ch;
 577         struct dev_context *devc;
 578         struct sr_scpi_dev_inst *scpi;
 579
 580         devc = sdi->priv;
 581         scpi = sdi->conn;
 582         state = devc->model_state;
 583         model = devc->model_config;
 584         setup_changed = FALSE;
 585
 586         pod_enabled = g_malloc0(sizeof(gboolean) * model->pods);
 587
 588         for (l = sdi->channels; l; l = l->next) {
 589                 ch = l->data;
 590                 switch (ch->type) {
 591                 case SR_CHANNEL_ANALOG:
 592                         if (ch->enabled == state->analog_states[ch->index].state)
 593                                 break;
 594
 595                         if (dlm_analog_chan_state_set(scpi, ch->index + 1,
 596                                         ch->enabled) != SR_OK)
 597                                 return SR_ERR;
 598
 599                         state->analog_states[ch->index].state = ch->enabled;
 600                         setup_changed = TRUE;
 601                         break;
 602                 case SR_CHANNEL_LOGIC:
 603                         if (ch->enabled)
 604                                 pod_enabled[ch->index / 8] = TRUE;
 605
 606                         if (ch->enabled == state->digital_states[ch->index])
 607                                 break;
 608
 609                         if (dlm_digital_chan_state_set(scpi, ch->index + 1,
 610                                         ch->enabled) != SR_OK)
 611                                 return SR_ERR;
 612
 613                         state->digital_states[ch->index] = ch->enabled;
 614                         setup_changed = TRUE;
 615                         break;
 616                 default:
 617                         return SR_ERR;
 618                 }
 619         }
 620
 621         for (i = 1; i <= model->pods; ++i) {
 622                 if (state->pod_states[i - 1] == pod_enabled[i - 1])
 623                         continue;
 624
 625                 if (dlm_digital_pod_state_set(scpi, i,
 626                                 pod_enabled[i - 1]) != SR_OK)
 627                         return SR_ERR;
 628
 629                 state->pod_states[i - 1] = pod_enabled[i - 1];
 630                 setup_changed = TRUE;
 631         }
 632
 633         g_free(pod_enabled);
 634
 635         if (setup_changed && dlm_sample_rate_query(sdi) != SR_OK)
 636                 return SR_ERR;
 637
 638         return SR_OK;
 639 }
 640
 641 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 642 {
 643         GSList *l;
 644         gboolean digital_added;
 645         struct sr_channel *ch;
 646         struct dev_context *devc;
 647         struct sr_scpi_dev_inst *scpi;
 648
 649         (void)cb_data;
 650
 651         if (sdi->status != SR_ST_ACTIVE)
 652                 return SR_ERR_DEV_CLOSED;
 653
 654         scpi = sdi->conn;
 655         devc = sdi->priv;
 656         digital_added = FALSE;
 657
 658         g_slist_free(devc->enabled_channels);
 659         devc->enabled_channels = NULL;
 660
 661         for (l = sdi->channels; l; l = l->next) {
 662                 ch = l->data;
 663                 if (!ch->enabled)
 664                         continue;
 665                 /* Only add a single digital channel. */
 666                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 667                         devc->enabled_channels = g_slist_append(
 668                                 devc->enabled_channels, ch);
 669                         if (ch->type == SR_CHANNEL_LOGIC)
 670                                 digital_added = TRUE;
 671                 }
 672         }
 673
 674         if (!devc->enabled_channels)
 675                 return SR_ERR;
 676
 677         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 678                 sr_err("Invalid channel configuration specified!");
 679                 return SR_ERR_NA;
 680         }
 681
 682         if (dlm_setup_channels(sdi) != SR_OK) {
 683                 sr_err("Failed to setup channel configuration!");
 684                 return SR_ERR;
 685         }
 686
 687         /* Request data for the first enabled channel. */
 688         devc->current_channel = devc->enabled_channels;
 689         dlm_channel_data_request(sdi);
 690
 691         /* Call our callback when data comes in or after 5ms. */
 692         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 693                         dlm_data_receive, (void *)sdi);
 694
 695         return SR_OK;
 696 }
 697
 698 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 699 {
 700         struct dev_context *devc;
 701         struct sr_datafeed_packet packet;
 702
 703         (void)cb_data;
 704
 705         packet.type = SR_DF_END;
 706         packet.payload = NULL;
 707         sr_session_send(sdi, &packet);
 708
 709         if (sdi->status != SR_ST_ACTIVE)
 710                 return SR_ERR_DEV_CLOSED;
 711
 712         devc = sdi->priv;
 713
 714         devc->num_frames = 0;
 715         g_slist_free(devc->enabled_channels);
 716         devc->enabled_channels = NULL;
 717
 718         sr_scpi_source_remove(sdi->session, sdi->conn);
 719
 720         return SR_OK;
 721 }
 722
 723 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info = {
 724         .name = "yokogawa-dlm",
 725         .longname = "Yokogawa DL/DLM",
 726         .api_version = 1,
 727         .init = init,
 728         .cleanup = cleanup,
 729         .scan = scan,
 730         .dev_list = dev_list,
 731         .dev_clear = dev_clear,
 732         .config_get = config_get,
 733         .config_set = config_set,
 734         .config_list = config_list,
 735         .dev_open = dev_open,
 736         .dev_close = dev_close,
 737         .dev_acquisition_start = dev_acquisition_start,
 738         .dev_acquisition_stop = dev_acquisition_stop,
 739         .priv = NULL,
 740 };