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 static struct sr_dev_driver *di = &yokogawa_dlm_driver_info;
  26
  27 static char *MANUFACTURER_ID = "YOKOGAWA";
  28 static char *MANUFACTURER_NAME = "Yokogawa";
  29
  30 static const uint32_t drvopts[] = {
  31         SR_CONF_LOGIC_ANALYZER,
  32         SR_CONF_OSCILLOSCOPE,
  33 };
  34
  35 enum {
  36         CG_INVALID = -1,
  37         CG_NONE,
  38         CG_ANALOG,
  39         CG_DIGITAL,
  40 };
  41
  42 static int init(struct sr_context *sr_ctx)
  43 {
  44         return std_init(sr_ctx, di, LOG_PREFIX);
  45 }
  46
  47 static struct sr_dev_inst *probe_usbtmc_device(struct sr_scpi_dev_inst *scpi)
  48 {
  49         struct sr_dev_inst *sdi;
  50         struct dev_context *devc;
  51         struct sr_scpi_hw_info *hw_info;
  52         char *model_name;
  53         int model_index;
  54
  55         sdi = NULL;
  56         devc = NULL;
  57         hw_info = NULL;
  58
  59         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  60                 sr_info("Couldn't get IDN response.");
  61                 goto fail;
  62         }
  63
  64         if (strcmp(hw_info->manufacturer, MANUFACTURER_ID) != 0)
  65                 goto fail;
  66
  67         if (dlm_model_get(hw_info->model, &model_name, &model_index) != SR_OK)
  68                 goto fail;
  69
  70         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  71         sdi->status = SR_ST_ACTIVE;
  72         sdi->vendor = g_strdup(MANUFACTURER_NAME);
  73         sdi->model = g_strdup(model_name);
  74         sdi->version = g_strdup(hw_info->firmware_version);
  75
  76         sdi->serial_num = g_strdup(hw_info->serial_number);
  77
  78         sr_scpi_hw_info_free(hw_info);
  79         hw_info = NULL;
  80
  81         devc = g_malloc0(sizeof(struct dev_context));
  82
  83         sdi->driver = di;
  84         sdi->priv = devc;
  85         sdi->inst_type = SR_INST_SCPI;
  86         sdi->conn = scpi;
  87
  88         if (dlm_device_init(sdi, model_index) != SR_OK)
  89                 goto fail;
  90
  91         sr_scpi_close(sdi->conn);
  92
  93         sdi->status = SR_ST_INACTIVE;
  94         return sdi;
  95
  96 fail:
  97         if (hw_info)
  98                 sr_scpi_hw_info_free(hw_info);
  99         if (sdi)
 100                 sr_dev_inst_free(sdi);
 101         if (devc)
 102                 g_free(devc);
 103
 104         return NULL;
 105 }
 106
 107 static GSList *scan(GSList *options)
 108 {
 109         return sr_scpi_scan(di->priv, options, probe_usbtmc_device);
 110 }
 111
 112 static GSList *dev_list(void)
 113 {
 114         return ((struct drv_context *)(di->priv))->instances;
 115 }
 116
 117 static void clear_helper(void *priv)
 118 {
 119         struct dev_context *devc;
 120
 121         devc = priv;
 122
 123         dlm_scope_state_destroy(devc->model_state);
 124
 125         g_free(devc->analog_groups);
 126         g_free(devc->digital_groups);
 127         g_free(devc);
 128 }
 129
 130 static int dev_clear(void)
 131 {
 132         return std_dev_clear(di, clear_helper);
 133 }
 134
 135 static int dev_open(struct sr_dev_inst *sdi)
 136 {
 137         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 138                 return SR_ERR;
 139
 140         if (dlm_scope_state_query(sdi) != SR_OK)
 141                 return SR_ERR;
 142
 143         sdi->status = SR_ST_ACTIVE;
 144
 145         return SR_OK;
 146 }
 147
 148 static int dev_close(struct sr_dev_inst *sdi)
 149 {
 150         if (sdi->status == SR_ST_INACTIVE)
 151                 return SR_OK;
 152
 153         sr_scpi_close(sdi->conn);
 154
 155         sdi->status = SR_ST_INACTIVE;
 156
 157         return SR_OK;
 158 }
 159
 160 static int cleanup(void)
 161 {
 162         dev_clear();
 163
 164         return SR_OK;
 165 }
 166
 167 /**
 168  * Check which category a given channel group belongs to.
 169  *
 170  * @param devc Our internal device context.
 171  * @param cg   The channel group to check.
 172  *
 173  * @retval CG_NONE    cg is NULL
 174  * @retval CG_ANALOG  cg is an analog group
 175  * @retval CG_DIGITAL cg is a digital group
 176  * @retval CG_INVALID cg is something else
 177  */
 178 static int check_channel_group(struct dev_context *devc,
 179                         const struct sr_channel_group *cg)
 180 {
 181         unsigned int i;
 182         struct scope_config *model;
 183
 184         model = devc->model_config;
 185
 186         if (!cg)
 187                 return CG_NONE;
 188
 189         for (i = 0; i < model->analog_channels; ++i)
 190                 if (cg == devc->analog_groups[i])
 191                         return CG_ANALOG;
 192
 193         for (i = 0; i < model->pods; ++i)
 194                 if (cg == devc->digital_groups[i])
 195                         return CG_DIGITAL;
 196
 197         sr_err("Invalid channel group specified.");
 198         return CG_INVALID;
 199 }
 200
 201 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 202                 const struct sr_channel_group *cg)
 203 {
 204         int ret, cg_type;
 205         unsigned int i;
 206         struct dev_context *devc;
 207         struct scope_config *model;
 208         struct scope_state *state;
 209
 210         if (!sdi || !(devc = sdi->priv))
 211                 return SR_ERR_ARG;
 212
 213         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 214                 return SR_ERR;
 215
 216         ret = SR_ERR_NA;
 217         model = devc->model_config;
 218         state = devc->model_state;
 219
 220         switch (key) {
 221         case SR_CONF_NUM_TIMEBASE:
 222                 *data = g_variant_new_int32(model->num_xdivs);
 223                 ret = SR_OK;
 224                 break;
 225         case SR_CONF_TIMEBASE:
 226                 *data = g_variant_new("(tt)",
 227                                 (*model->timebases)[state->timebase][0],
 228                                 (*model->timebases)[state->timebase][1]);
 229                 ret = SR_OK;
 230                 break;
 231         case SR_CONF_NUM_VDIV:
 232                 if (cg_type == CG_NONE) {
 233                         sr_err("No channel group specified.");
 234                         return SR_ERR_CHANNEL_GROUP;
 235                 } else if (cg_type == CG_ANALOG) {
 236                                 *data = g_variant_new_int32(model->num_ydivs);
 237                                 ret = SR_OK;
 238                                 break;
 239                 } else {
 240                         ret = SR_ERR_NA;
 241                 }
 242                 break;
 243         case SR_CONF_VDIV:
 244                 ret = SR_ERR_NA;
 245                 if (cg_type == CG_NONE) {
 246                         sr_err("No channel group specified.");
 247                         return SR_ERR_CHANNEL_GROUP;
 248                 } else if (cg_type != CG_ANALOG)
 249                         break;
 250
 251                 for (i = 0; i < model->analog_channels; ++i) {
 252                         if (cg != devc->analog_groups[i])
 253                                 continue;
 254                         *data = g_variant_new("(tt)",
 255                                         (*model->vdivs)[state->analog_states[i].vdiv][0],
 256                                         (*model->vdivs)[state->analog_states[i].vdiv][1]);
 257                         ret = SR_OK;
 258                         break;
 259                 }
 260                 break;
 261         case SR_CONF_TRIGGER_SOURCE:
 262                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 263                 ret = SR_OK;
 264                 break;
 265         case SR_CONF_TRIGGER_SLOPE:
 266                 *data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
 267                 ret = SR_OK;
 268                 break;
 269         case SR_CONF_HORIZ_TRIGGERPOS:
 270                 *data = g_variant_new_double(state->horiz_triggerpos);
 271                 ret = SR_OK;
 272                 break;
 273         case SR_CONF_COUPLING:
 274                 ret = SR_ERR_NA;
 275                 if (cg_type == CG_NONE) {
 276                         sr_err("No channel group specified.");
 277                         return SR_ERR_CHANNEL_GROUP;
 278                 } else if (cg_type != CG_ANALOG)
 279                         break;
 280
 281                 for (i = 0; i < model->analog_channels; ++i) {
 282                         if (cg != devc->analog_groups[i])
 283                                 continue;
 284                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 285                         ret = SR_OK;
 286                         break;
 287                 }
 288                 break;
 289         case SR_CONF_SAMPLERATE:
 290                 *data = g_variant_new_uint64(state->sample_rate);
 291                 ret = SR_OK;
 292                 break;
 293         default:
 294                 ret = SR_ERR_NA;
 295         }
 296
 297         return ret;
 298 }
 299
 300 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 301 {
 302         unsigned int i;
 303         GVariant *rational[2];
 304         GVariantBuilder gvb;
 305
 306         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 307
 308         for (i = 0; i < n; i++) {
 309                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 310                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 311
 312                 /* FIXME: Valgrind reports a memory leak here. */
 313                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 314         }
 315
 316         return g_variant_builder_end(&gvb);
 317 }
 318
 319 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 320                 const struct sr_channel_group *cg)
 321 {
 322         int ret, cg_type;
 323         unsigned int i, j;
 324         char float_str[30];
 325         struct dev_context *devc;
 326         struct scope_config *model;
 327         struct scope_state *state;
 328         const char *tmp;
 329         uint64_t p, q;
 330         double tmp_d;
 331         gboolean update_sample_rate;
 332
 333         if (!sdi || !(devc = sdi->priv))
 334                 return SR_ERR_ARG;
 335
 336         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 337                 return SR_ERR;
 338
 339         model = devc->model_config;
 340         state = devc->model_state;
 341         update_sample_rate = FALSE;
 342
 343         ret = SR_ERR_NA;
 344
 345         switch (key) {
 346         case SR_CONF_LIMIT_FRAMES:
 347                 devc->frame_limit = g_variant_get_uint64(data);
 348                 ret = SR_OK;
 349                 break;
 350         case SR_CONF_TRIGGER_SOURCE:
 351                 tmp = g_variant_get_string(data, NULL);
 352                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 353                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 354                                 continue;
 355                         state->trigger_source = i;
 356                         /* TODO: A and B trigger support possible? */
 357                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 358                         break;
 359                 }
 360                 break;
 361         case SR_CONF_VDIV:
 362                 if (cg_type == CG_NONE) {
 363                         sr_err("No channel group specified.");
 364                         return SR_ERR_CHANNEL_GROUP;
 365                 }
 366
 367                 g_variant_get(data, "(tt)", &p, &q);
 368
 369                 for (i = 0; i < model->num_vdivs; i++) {
 370                         if (p != (*model->vdivs)[i][0] ||
 371                                         q != (*model->vdivs)[i][1])
 372                                 continue;
 373                         for (j = 1; j <= model->analog_channels; ++j) {
 374                                 if (cg != devc->analog_groups[j - 1])
 375                                         continue;
 376                                 state->analog_states[j - 1].vdiv = i;
 377                                 g_ascii_formatd(float_str, sizeof(float_str),
 378                                                 "%E", (float) p / q);
 379                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 380                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 381                                         return SR_ERR;
 382
 383                                 break;
 384                         }
 385
 386                         ret = SR_OK;
 387                         break;
 388                 }
 389                 break;
 390         case SR_CONF_TIMEBASE:
 391                 g_variant_get(data, "(tt)", &p, &q);
 392
 393                 for (i = 0; i < model->num_timebases; i++) {
 394                         if (p != (*model->timebases)[i][0] ||
 395                                         q != (*model->timebases)[i][1])
 396                                 continue;
 397                         state->timebase = i;
 398                         g_ascii_formatd(float_str, sizeof(float_str),
 399                                         "%E", (float) p / q);
 400                         ret = dlm_timebase_set(sdi->conn, float_str);
 401                         update_sample_rate = TRUE;
 402                         break;
 403                 }
 404                 break;
 405         case SR_CONF_HORIZ_TRIGGERPOS:
 406                 tmp_d = g_variant_get_double(data);
 407
 408                 /* TODO: Check if the calculation makes sense for the DLM. */
 409                 if (tmp_d < 0.0 || tmp_d > 1.0)
 410                         return SR_ERR;
 411
 412                 state->horiz_triggerpos = tmp_d;
 413                 tmp_d = -(tmp_d - 0.5) *
 414                                 ((double) (*model->timebases)[state->timebase][0] /
 415                                 (*model->timebases)[state->timebase][1])
 416                                 * model->num_xdivs;
 417
 418                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 419                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 420                 break;
 421         case SR_CONF_TRIGGER_SLOPE:
 422                 tmp = g_variant_get_string(data, NULL);
 423
 424                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 425                         return SR_ERR_ARG;
 426
 427                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 428                 state->trigger_slope = (tmp[0] == 'r') ?
 429                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 430
 431                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 432                 break;
 433         case SR_CONF_COUPLING:
 434                 if (cg_type == CG_NONE) {
 435                         sr_err("No channel group specified.");
 436                         return SR_ERR_CHANNEL_GROUP;
 437                 }
 438
 439                 tmp = g_variant_get_string(data, NULL);
 440
 441                 for (i = 0; (*model->coupling_options)[i]; i++) {
 442                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 443                                 continue;
 444                         for (j = 1; j <= model->analog_channels; ++j) {
 445                                 if (cg != devc->analog_groups[j - 1])
 446                                         continue;
 447                                 state->analog_states[j-1].coupling = i;
 448
 449                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 450                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 451                                         return SR_ERR;
 452                                 break;
 453                         }
 454
 455                         ret = SR_OK;
 456                         break;
 457                 }
 458                 break;
 459         default:
 460                 ret = SR_ERR_NA;
 461                 break;
 462         }
 463
 464         if (ret == SR_OK)
 465                 ret = sr_scpi_get_opc(sdi->conn);
 466
 467         if (ret == SR_OK && update_sample_rate)
 468                 ret = dlm_sample_rate_query(sdi);
 469
 470         return ret;
 471 }
 472
 473 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 474                 const struct sr_channel_group *cg)
 475 {
 476         int cg_type = CG_NONE;
 477         struct dev_context *devc = NULL;
 478         struct scope_config *model = NULL;
 479
 480         if (sdi && (devc = sdi->priv)) {
 481                 if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 482                         return SR_ERR;
 483
 484                 model = devc->model_config;
 485         }
 486
 487         switch (key) {
 488         case SR_CONF_DEVICE_OPTIONS:
 489                 if (cg_type == CG_NONE) {
 490                         if (model)
 491                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 492                                         model->devopts, model->num_devopts, sizeof(uint32_t));
 493                         else
 494                                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 495                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 496                 } else if (cg_type == CG_ANALOG) {
 497                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 498                                 model->analog_devopts, model->num_analog_devopts, sizeof(uint32_t));
 499                 } else {
 500                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 501                                 NULL, 0, sizeof(uint32_t));
 502                 }
 503                 break;
 504         case SR_CONF_COUPLING:
 505                 if (cg_type == CG_NONE)
 506                         return SR_ERR_CHANNEL_GROUP;
 507                 *data = g_variant_new_strv(*model->coupling_options,
 508                                 g_strv_length((char **)*model->coupling_options));
 509                 break;
 510         case SR_CONF_TRIGGER_SOURCE:
 511                 if (!model)
 512                         return SR_ERR_ARG;
 513                 *data = g_variant_new_strv(*model->trigger_sources,
 514                                 g_strv_length((char **)*model->trigger_sources));
 515                 break;
 516         case SR_CONF_TRIGGER_SLOPE:
 517                 if (!model)
 518                         return SR_ERR_ARG;
 519                 *data = g_variant_new_strv(*model->trigger_slopes,
 520                                 g_strv_length((char **)*model->trigger_slopes));
 521                 break;
 522         case SR_CONF_TIMEBASE:
 523                 if (!model)
 524                         return SR_ERR_ARG;
 525                 *data = build_tuples(model->timebases, model->num_timebases);
 526                 break;
 527         case SR_CONF_VDIV:
 528                 if (cg_type == CG_NONE)
 529                         return SR_ERR_CHANNEL_GROUP;
 530                 *data = build_tuples(model->vdivs, model->num_vdivs);
 531                 break;
 532         default:
 533                 return SR_ERR_NA;
 534         }
 535
 536         return SR_OK;
 537 }
 538
 539 static int dlm_check_channels(GSList *channels)
 540 {
 541         GSList *l;
 542         struct sr_channel *ch;
 543         gboolean enabled_pod1, enabled_chan4;
 544
 545         enabled_pod1 = enabled_chan4 = FALSE;
 546
 547         /* Note: On the DLM2000, CH4 and Logic are shared. */
 548         /* TODO Handle non-DLM2000 models. */
 549         for (l = channels; l; l = l->next) {
 550                 ch = l->data;
 551                 switch (ch->type) {
 552                 case SR_CHANNEL_ANALOG:
 553                         if (ch->index == 3)
 554                                 enabled_chan4 = TRUE;
 555                         break;
 556                 case SR_CHANNEL_LOGIC:
 557                         enabled_pod1 = TRUE;
 558                         break;
 559                 default:
 560                         return SR_ERR;
 561                 }
 562         }
 563
 564         if (enabled_pod1 && enabled_chan4)
 565                 return SR_ERR;
 566
 567         return SR_OK;
 568 }
 569
 570 static int dlm_setup_channels(const struct sr_dev_inst *sdi)
 571 {
 572         GSList *l;
 573         unsigned int i;
 574         gboolean *pod_enabled, setup_changed;
 575         struct scope_state *state;
 576         struct scope_config *model;
 577         struct sr_channel *ch;
 578         struct dev_context *devc;
 579         struct sr_scpi_dev_inst *scpi;
 580
 581         devc = sdi->priv;
 582         scpi = sdi->conn;
 583         state = devc->model_state;
 584         model = devc->model_config;
 585         setup_changed = FALSE;
 586
 587         pod_enabled = g_malloc0(sizeof(gboolean) * model->pods);
 588
 589         for (l = sdi->channels; l; l = l->next) {
 590                 ch = l->data;
 591                 switch (ch->type) {
 592                 case SR_CHANNEL_ANALOG:
 593                         if (ch->enabled == state->analog_states[ch->index].state)
 594                                 break;
 595
 596                         if (dlm_analog_chan_state_set(scpi, ch->index + 1,
 597                                         ch->enabled) != SR_OK)
 598                                 return SR_ERR;
 599
 600                         state->analog_states[ch->index].state = ch->enabled;
 601                         setup_changed = TRUE;
 602                         break;
 603                 case SR_CHANNEL_LOGIC:
 604                         if (ch->enabled)
 605                                 pod_enabled[ch->index / 8] = TRUE;
 606
 607                         if (ch->enabled == state->digital_states[ch->index])
 608                                 break;
 609
 610                         if (dlm_digital_chan_state_set(scpi, ch->index + 1,
 611                                         ch->enabled) != SR_OK)
 612                                 return SR_ERR;
 613
 614                         state->digital_states[ch->index] = ch->enabled;
 615                         setup_changed = TRUE;
 616                         break;
 617                 default:
 618                         return SR_ERR;
 619                 }
 620         }
 621
 622         for (i = 1; i <= model->pods; ++i) {
 623                 if (state->pod_states[i - 1] == pod_enabled[i - 1])
 624                         continue;
 625
 626                 if (dlm_digital_pod_state_set(scpi, i,
 627                                 pod_enabled[i - 1]) != SR_OK)
 628                         return SR_ERR;
 629
 630                 state->pod_states[i - 1] = pod_enabled[i - 1];
 631                 setup_changed = TRUE;
 632         }
 633
 634         g_free(pod_enabled);
 635
 636         if (setup_changed && dlm_sample_rate_query(sdi) != SR_OK)
 637                 return SR_ERR;
 638
 639         return SR_OK;
 640 }
 641
 642 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 643 {
 644         GSList *l;
 645         gboolean digital_added;
 646         struct sr_channel *ch;
 647         struct dev_context *devc;
 648         struct sr_scpi_dev_inst *scpi;
 649
 650         (void)cb_data;
 651
 652         if (sdi->status != SR_ST_ACTIVE)
 653                 return SR_ERR_DEV_CLOSED;
 654
 655         scpi = sdi->conn;
 656         devc = sdi->priv;
 657         digital_added = FALSE;
 658
 659         g_slist_free(devc->enabled_channels);
 660         devc->enabled_channels = NULL;
 661
 662         for (l = sdi->channels; l; l = l->next) {
 663                 ch = l->data;
 664                 if (!ch->enabled)
 665                         continue;
 666                 /* Only add a single digital channel. */
 667                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 668                         devc->enabled_channels = g_slist_append(
 669                                 devc->enabled_channels, ch);
 670                         if (ch->type == SR_CHANNEL_LOGIC)
 671                                 digital_added = TRUE;
 672                 }
 673         }
 674
 675         if (!devc->enabled_channels)
 676                 return SR_ERR;
 677
 678         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 679                 sr_err("Invalid channel configuration specified!");
 680                 return SR_ERR_NA;
 681         }
 682
 683         if (dlm_setup_channels(sdi) != SR_OK) {
 684                 sr_err("Failed to setup channel configuration!");
 685                 return SR_ERR;
 686         }
 687
 688         /* Request data for the first enabled channel. */
 689         devc->current_channel = devc->enabled_channels;
 690         dlm_channel_data_request(sdi);
 691
 692         /* Call our callback when data comes in or after 5ms. */
 693         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 694                         dlm_data_receive, (void *)sdi);
 695
 696         return SR_OK;
 697 }
 698
 699 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 700 {
 701         struct dev_context *devc;
 702         struct sr_datafeed_packet packet;
 703
 704         (void)cb_data;
 705
 706         packet.type = SR_DF_END;
 707         packet.payload = NULL;
 708         sr_session_send(sdi, &packet);
 709
 710         if (sdi->status != SR_ST_ACTIVE)
 711                 return SR_ERR_DEV_CLOSED;
 712
 713         devc = sdi->priv;
 714
 715         devc->num_frames = 0;
 716         g_slist_free(devc->enabled_channels);
 717         devc->enabled_channels = NULL;
 718
 719         sr_scpi_source_remove(sdi->session, sdi->conn);
 720
 721         return SR_OK;
 722 }
 723
 724 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info = {
 725         .name = "yokogawa-dlm",
 726         .longname = "Yokogawa DL/DLM",
 727         .api_version = 1,
 728         .init = init,
 729         .cleanup = cleanup,
 730         .scan = scan,
 731         .dev_list = dev_list,
 732         .dev_clear = dev_clear,
 733         .config_get = config_get,
 734         .config_set = config_set,
 735         .config_list = config_list,
 736         .dev_open = dev_open,
 737         .dev_close = dev_close,
 738         .dev_acquisition_start = dev_acquisition_start,
 739         .dev_acquisition_stop = dev_acquisition_stop,
 740         .priv = NULL,
 741 };