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 <config.h>
  22 #include <stdlib.h>
  23 #include "scpi.h"
  24 #include "protocol.h"
  25
  26 static struct sr_dev_driver yokogawa_dlm_driver_info;
  27
  28 static const char *MANUFACTURER_ID = "YOKOGAWA";
  29 static const char *MANUFACTURER_NAME = "Yokogawa";
  30
  31 static const uint32_t dlm_scanopts[] = {
  32         SR_CONF_CONN,
  33 };
  34
  35 static const uint32_t dlm_drvopts[] = {
  36         SR_CONF_LOGIC_ANALYZER,
  37         SR_CONF_OSCILLOSCOPE,
  38 };
  39
  40 static const uint32_t dlm_devopts[] = {
  41         SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
  42         SR_CONF_SAMPLERATE | SR_CONF_GET,
  43         SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  44         SR_CONF_NUM_HDIV | SR_CONF_GET,
  45         SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
  46         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  47         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  48 };
  49
  50 static const uint32_t dlm_analog_devopts[] = {
  51         SR_CONF_NUM_VDIV | SR_CONF_GET,
  52         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  53         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  54 };
  55
  56 static const uint32_t dlm_digital_devopts[] = {
  57 };
  58
  59 enum {
  60         CG_INVALID = -1,
  61         CG_NONE,
  62         CG_ANALOG,
  63         CG_DIGITAL,
  64 };
  65
  66 static struct sr_dev_inst *probe_usbtmc_device(struct sr_scpi_dev_inst *scpi)
  67 {
  68         struct sr_dev_inst *sdi;
  69         struct dev_context *devc;
  70         struct sr_scpi_hw_info *hw_info;
  71         char *model_name;
  72         int model_index;
  73
  74         sdi = NULL;
  75         devc = NULL;
  76         hw_info = NULL;
  77
  78         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  79                 sr_info("Couldn't get IDN response.");
  80                 goto fail;
  81         }
  82
  83         if (strcmp(hw_info->manufacturer, MANUFACTURER_ID) != 0)
  84                 goto fail;
  85
  86         if (dlm_model_get(hw_info->model, &model_name, &model_index) != SR_OK)
  87                 goto fail;
  88
  89         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  90         sdi->vendor = g_strdup(MANUFACTURER_NAME);
  91         sdi->model = g_strdup(model_name);
  92         sdi->version = g_strdup(hw_info->firmware_version);
  93
  94         sdi->serial_num = g_strdup(hw_info->serial_number);
  95
  96         sr_scpi_hw_info_free(hw_info);
  97         hw_info = NULL;
  98
  99         devc = g_malloc0(sizeof(struct dev_context));
 100
 101         sdi->driver = &yokogawa_dlm_driver_info;
 102         sdi->priv = devc;
 103         sdi->inst_type = SR_INST_SCPI;
 104         sdi->conn = scpi;
 105
 106         if (dlm_device_init(sdi, model_index) != SR_OK)
 107                 goto fail;
 108
 109         return sdi;
 110
 111 fail:
 112         sr_scpi_hw_info_free(hw_info);
 113         sr_dev_inst_free(sdi);
 114         g_free(devc);
 115
 116         return NULL;
 117 }
 118
 119 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 120 {
 121         return sr_scpi_scan(di->context, options, probe_usbtmc_device);
 122 }
 123
 124 static void clear_helper(void *priv)
 125 {
 126         struct dev_context *devc;
 127
 128         devc = priv;
 129
 130         dlm_scope_state_destroy(devc->model_state);
 131
 132         g_free(devc->analog_groups);
 133         g_free(devc->digital_groups);
 134         g_free(devc);
 135 }
 136
 137 static int dev_clear(const struct sr_dev_driver *di)
 138 {
 139         return std_dev_clear(di, clear_helper);
 140 }
 141
 142 static int dev_open(struct sr_dev_inst *sdi)
 143 {
 144         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 145                 return SR_ERR;
 146
 147         if (dlm_scope_state_query(sdi) != SR_OK)
 148                 return SR_ERR;
 149
 150         sdi->status = SR_ST_ACTIVE;
 151
 152         return SR_OK;
 153 }
 154
 155 static int dev_close(struct sr_dev_inst *sdi)
 156 {
 157         sr_scpi_close(sdi->conn);
 158
 159         sdi->status = SR_ST_INACTIVE;
 160
 161         return SR_OK;
 162 }
 163
 164 /**
 165  * Check which category a given channel group belongs to.
 166  *
 167  * @param devc Our internal device context.
 168  * @param cg The channel group to check.
 169  *
 170  * @retval CG_NONE cg is NULL
 171  * @retval CG_ANALOG cg is an analog group
 172  * @retval CG_DIGITAL cg is a digital group
 173  * @retval CG_INVALID cg is something else
 174  */
 175 static int check_channel_group(struct dev_context *devc,
 176                         const struct sr_channel_group *cg)
 177 {
 178         unsigned int i;
 179         const struct scope_config *model;
 180
 181         model = devc->model_config;
 182
 183         if (!cg)
 184                 return CG_NONE;
 185
 186         for (i = 0; i < model->analog_channels; i++)
 187                 if (cg == devc->analog_groups[i])
 188                         return CG_ANALOG;
 189
 190         for (i = 0; i < model->pods; i++)
 191                 if (cg == devc->digital_groups[i])
 192                         return CG_DIGITAL;
 193
 194         sr_err("Invalid channel group specified.");
 195         return CG_INVALID;
 196 }
 197
 198 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 199                 const struct sr_channel_group *cg)
 200 {
 201         int ret, cg_type;
 202         unsigned int i;
 203         struct dev_context *devc;
 204         const struct scope_config *model;
 205         struct scope_state *state;
 206
 207         if (!sdi)
 208                 return SR_ERR_ARG;
 209
 210         devc = sdi->priv;
 211
 212         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 213                 return SR_ERR;
 214
 215         model = devc->model_config;
 216         state = devc->model_state;
 217
 218         switch (key) {
 219         case SR_CONF_NUM_HDIV:
 220                 *data = g_variant_new_int32(model->num_xdivs);
 221                 ret = SR_OK;
 222                 break;
 223         case SR_CONF_TIMEBASE:
 224                 *data = g_variant_new("(tt)",
 225                                 dlm_timebases[state->timebase][0],
 226                                 dlm_timebases[state->timebase][1]);
 227                 ret = SR_OK;
 228                 break;
 229         case SR_CONF_NUM_VDIV:
 230                 if (cg_type == CG_NONE) {
 231                         sr_err("No channel group specified.");
 232                         return SR_ERR_CHANNEL_GROUP;
 233                 } else if (cg_type == CG_ANALOG) {
 234                                 *data = g_variant_new_int32(model->num_ydivs);
 235                                 ret = SR_OK;
 236                                 break;
 237                 } else {
 238                         ret = SR_ERR_NA;
 239                 }
 240                 break;
 241         case SR_CONF_VDIV:
 242                 ret = SR_ERR_NA;
 243                 if (cg_type == CG_NONE) {
 244                         sr_err("No channel group specified.");
 245                         return SR_ERR_CHANNEL_GROUP;
 246                 } else if (cg_type != CG_ANALOG)
 247                         break;
 248
 249                 for (i = 0; i < model->analog_channels; i++) {
 250                         if (cg != devc->analog_groups[i])
 251                                 continue;
 252                         *data = g_variant_new("(tt)",
 253                                         dlm_vdivs[state->analog_states[i].vdiv][0],
 254                                         dlm_vdivs[state->analog_states[i].vdiv][1]);
 255                         ret = SR_OK;
 256                         break;
 257                 }
 258                 break;
 259         case SR_CONF_TRIGGER_SOURCE:
 260                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 261                 ret = SR_OK;
 262                 break;
 263         case SR_CONF_TRIGGER_SLOPE:
 264                 *data = g_variant_new_string(dlm_trigger_slopes[state->trigger_slope]);
 265                 ret = SR_OK;
 266                 break;
 267         case SR_CONF_HORIZ_TRIGGERPOS:
 268                 *data = g_variant_new_double(state->horiz_triggerpos);
 269                 ret = SR_OK;
 270                 break;
 271         case SR_CONF_COUPLING:
 272                 ret = SR_ERR_NA;
 273                 if (cg_type == CG_NONE) {
 274                         sr_err("No channel group specified.");
 275                         return SR_ERR_CHANNEL_GROUP;
 276                 } else if (cg_type != CG_ANALOG)
 277                         break;
 278
 279                 for (i = 0; i < model->analog_channels; i++) {
 280                         if (cg != devc->analog_groups[i])
 281                                 continue;
 282                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 283                         ret = SR_OK;
 284                         break;
 285                 }
 286                 break;
 287         case SR_CONF_SAMPLERATE:
 288                 *data = g_variant_new_uint64(state->sample_rate);
 289                 ret = SR_OK;
 290                 break;
 291         default:
 292                 ret = SR_ERR_NA;
 293         }
 294
 295         return ret;
 296 }
 297
 298 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 299 {
 300         unsigned int i;
 301         GVariant *rational[2];
 302         GVariantBuilder gvb;
 303
 304         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 305
 306         for (i = 0; i < n; i++) {
 307                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 308                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 309
 310                 /* FIXME: Valgrind reports a memory leak here. */
 311                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 312         }
 313
 314         return g_variant_builder_end(&gvb);
 315 }
 316
 317 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 318                 const struct sr_channel_group *cg)
 319 {
 320         int ret, cg_type;
 321         unsigned int i, j;
 322         char float_str[30];
 323         struct dev_context *devc;
 324         const struct scope_config *model;
 325         struct scope_state *state;
 326         const char *tmp;
 327         uint64_t p, q;
 328         double tmp_d;
 329         gboolean update_sample_rate;
 330
 331         if (!sdi || !(devc = sdi->priv))
 332                 return SR_ERR_ARG;
 333
 334         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 335                 return SR_ERR;
 336
 337         model = devc->model_config;
 338         state = devc->model_state;
 339         update_sample_rate = FALSE;
 340
 341         ret = SR_ERR_NA;
 342
 343         switch (key) {
 344         case SR_CONF_LIMIT_FRAMES:
 345                 devc->frame_limit = g_variant_get_uint64(data);
 346                 ret = SR_OK;
 347                 break;
 348         case SR_CONF_TRIGGER_SOURCE:
 349                 tmp = g_variant_get_string(data, NULL);
 350                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 351                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 352                                 continue;
 353                         state->trigger_source = i;
 354                         /* TODO: A and B trigger support possible? */
 355                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 356                         break;
 357                 }
 358                 break;
 359         case SR_CONF_VDIV:
 360                 if (cg_type == CG_NONE) {
 361                         sr_err("No channel group specified.");
 362                         return SR_ERR_CHANNEL_GROUP;
 363                 }
 364
 365                 g_variant_get(data, "(tt)", &p, &q);
 366
 367                 for (i = 0; i < ARRAY_SIZE(dlm_vdivs); i++) {
 368                         if (p != dlm_vdivs[i][0] ||
 369                                         q != dlm_vdivs[i][1])
 370                                 continue;
 371                         for (j = 1; j <= model->analog_channels; j++) {
 372                                 if (cg != devc->analog_groups[j - 1])
 373                                         continue;
 374                                 state->analog_states[j - 1].vdiv = i;
 375                                 g_ascii_formatd(float_str, sizeof(float_str),
 376                                                 "%E", (float) p / q);
 377                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 378                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 379                                         return SR_ERR;
 380
 381                                 break;
 382                         }
 383
 384                         ret = SR_OK;
 385                         break;
 386                 }
 387                 break;
 388         case SR_CONF_TIMEBASE:
 389                 g_variant_get(data, "(tt)", &p, &q);
 390
 391                 for (i = 0; i < ARRAY_SIZE(dlm_timebases); i++) {
 392                         if (p != dlm_timebases[i][0] ||
 393                                         q != dlm_timebases[i][1])
 394                                 continue;
 395                         state->timebase = i;
 396                         g_ascii_formatd(float_str, sizeof(float_str),
 397                                         "%E", (float) p / q);
 398                         ret = dlm_timebase_set(sdi->conn, float_str);
 399                         update_sample_rate = TRUE;
 400                         break;
 401                 }
 402                 break;
 403         case SR_CONF_HORIZ_TRIGGERPOS:
 404                 tmp_d = g_variant_get_double(data);
 405
 406                 /* TODO: Check if the calculation makes sense for the DLM. */
 407                 if (tmp_d < 0.0 || tmp_d > 1.0)
 408                         return SR_ERR;
 409
 410                 state->horiz_triggerpos = tmp_d;
 411                 tmp_d = -(tmp_d - 0.5) *
 412                                 ((double) dlm_timebases[state->timebase][0] /
 413                                 dlm_timebases[state->timebase][1])
 414                                 * model->num_xdivs;
 415
 416                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 417                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 418                 break;
 419         case SR_CONF_TRIGGER_SLOPE:
 420                 tmp = g_variant_get_string(data, NULL);
 421
 422                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 423                         return SR_ERR_ARG;
 424
 425                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 426                 state->trigger_slope = (tmp[0] == 'r') ?
 427                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 428
 429                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 430                 break;
 431         case SR_CONF_COUPLING:
 432                 if (cg_type == CG_NONE) {
 433                         sr_err("No channel group specified.");
 434                         return SR_ERR_CHANNEL_GROUP;
 435                 }
 436
 437                 tmp = g_variant_get_string(data, NULL);
 438
 439                 for (i = 0; (*model->coupling_options)[i]; i++) {
 440                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 441                                 continue;
 442                         for (j = 1; j <= model->analog_channels; j++) {
 443                                 if (cg != devc->analog_groups[j - 1])
 444                                         continue;
 445                                 state->analog_states[j-1].coupling = i;
 446
 447                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 448                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 449                                         return SR_ERR;
 450                                 break;
 451                         }
 452
 453                         ret = SR_OK;
 454                         break;
 455                 }
 456                 break;
 457         default:
 458                 ret = SR_ERR_NA;
 459                 break;
 460         }
 461
 462         if (ret == SR_OK)
 463                 ret = sr_scpi_get_opc(sdi->conn);
 464
 465         if (ret == SR_OK && update_sample_rate)
 466                 ret = dlm_sample_rate_query(sdi);
 467
 468         return ret;
 469 }
 470
 471 static int config_channel_set(const struct sr_dev_inst *sdi,
 472                         struct sr_channel *ch, unsigned int changes)
 473 {
 474         /* Currently we only handle SR_CHANNEL_SET_ENABLED. */
 475         if (changes != SR_CHANNEL_SET_ENABLED)
 476                 return SR_ERR_NA;
 477
 478         return dlm_channel_state_set(sdi, ch->index, ch->enabled);
 479 }
 480
 481 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 482                 const struct sr_channel_group *cg)
 483 {
 484         int cg_type = CG_NONE;
 485         struct dev_context *devc = NULL;
 486         const struct scope_config *model = NULL;
 487
 488         /* SR_CONF_SCAN_OPTIONS is always valid, regardless of sdi or channel group. */
 489         if (key == SR_CONF_SCAN_OPTIONS) {
 490                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 491                                 dlm_scanopts, ARRAY_SIZE(dlm_scanopts), sizeof(uint32_t));
 492                 return SR_OK;
 493         }
 494
 495         /* If sdi is NULL, nothing except SR_CONF_DEVICE_OPTIONS can be provided. */
 496         if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 497                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 498                                 dlm_drvopts, ARRAY_SIZE(dlm_drvopts), sizeof(uint32_t));
 499                 return SR_OK;
 500         }
 501
 502         if (!sdi)
 503                 return SR_ERR_ARG;
 504
 505         devc = sdi->priv;
 506         model = devc->model_config;
 507
 508         /*
 509          * If cg is NULL, only the SR_CONF_DEVICE_OPTIONS that are not
 510          * specific to a channel group must be returned.
 511          */
 512         if (!cg) {
 513                 switch (key) {
 514                 case SR_CONF_DEVICE_OPTIONS:
 515                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 516                                         dlm_devopts, ARRAY_SIZE(dlm_devopts), sizeof(uint32_t));
 517                         return SR_OK;
 518                 case SR_CONF_TIMEBASE:
 519                         *data = build_tuples(&dlm_timebases, ARRAY_SIZE(dlm_timebases));
 520                         return SR_OK;
 521                 case SR_CONF_TRIGGER_SOURCE:
 522                         if (!model)
 523                                 return SR_ERR_ARG;
 524                         *data = g_variant_new_strv(*model->trigger_sources,
 525                                         g_strv_length((char **)*model->trigger_sources));
 526                         return SR_OK;
 527                 case SR_CONF_TRIGGER_SLOPE:
 528                         *data = g_variant_new_strv(dlm_trigger_slopes,
 529                                         g_strv_length((char **)dlm_trigger_slopes));
 530                         return SR_OK;
 531                 case SR_CONF_NUM_HDIV:
 532                         *data = g_variant_new_uint32(model->num_xdivs);
 533                         return SR_OK;
 534                 default:
 535                         return SR_ERR_NA;
 536                 }
 537         }
 538
 539         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 540                 return SR_ERR;
 541
 542         switch (key) {
 543         case SR_CONF_DEVICE_OPTIONS:
 544                 if (cg_type == CG_ANALOG) {
 545                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 546                                 dlm_analog_devopts, ARRAY_SIZE(dlm_analog_devopts), sizeof(uint32_t));
 547                 } else if (cg_type == CG_DIGITAL) {
 548                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 549                                 dlm_digital_devopts, ARRAY_SIZE(dlm_digital_devopts), sizeof(uint32_t));
 550                 } else {
 551                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 552                                 NULL, 0, sizeof(uint32_t));
 553                 }
 554                 break;
 555         case SR_CONF_COUPLING:
 556                 if (cg_type == CG_NONE)
 557                         return SR_ERR_CHANNEL_GROUP;
 558                 *data = g_variant_new_strv(*model->coupling_options,
 559                                 g_strv_length((char **)*model->coupling_options));
 560                 break;
 561         case SR_CONF_VDIV:
 562                 if (cg_type == CG_NONE)
 563                         return SR_ERR_CHANNEL_GROUP;
 564                 *data = build_tuples(&dlm_vdivs, ARRAY_SIZE(dlm_vdivs));
 565                 break;
 566         default:
 567                 return SR_ERR_NA;
 568         }
 569
 570         return SR_OK;
 571 }
 572
 573 static int dlm_check_channels(GSList *channels)
 574 {
 575         GSList *l;
 576         struct sr_channel *ch;
 577         gboolean enabled_pod1, enabled_chan4;
 578
 579         enabled_pod1 = enabled_chan4 = FALSE;
 580
 581         /* Note: On the DLM2000, CH4 and Logic are shared. */
 582         /* TODO Handle non-DLM2000 models. */
 583         for (l = channels; l; l = l->next) {
 584                 ch = l->data;
 585                 switch (ch->type) {
 586                 case SR_CHANNEL_ANALOG:
 587                         if (ch->index == 3)
 588                                 enabled_chan4 = TRUE;
 589                         break;
 590                 case SR_CHANNEL_LOGIC:
 591                         enabled_pod1 = TRUE;
 592                         break;
 593                 default:
 594                         return SR_ERR;
 595                 }
 596         }
 597
 598         if (enabled_pod1 && enabled_chan4)
 599                 return SR_ERR;
 600
 601         return SR_OK;
 602 }
 603
 604 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 605 {
 606         GSList *l;
 607         gboolean digital_added;
 608         struct sr_channel *ch;
 609         struct dev_context *devc;
 610         struct sr_scpi_dev_inst *scpi;
 611
 612         scpi = sdi->conn;
 613         devc = sdi->priv;
 614         digital_added = FALSE;
 615
 616         g_slist_free(devc->enabled_channels);
 617         devc->enabled_channels = NULL;
 618
 619         for (l = sdi->channels; l; l = l->next) {
 620                 ch = l->data;
 621                 if (!ch->enabled)
 622                         continue;
 623                 /* Only add a single digital channel. */
 624                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 625                         devc->enabled_channels = g_slist_append(
 626                                 devc->enabled_channels, ch);
 627                         if (ch->type == SR_CHANNEL_LOGIC)
 628                                 digital_added = TRUE;
 629                 }
 630         }
 631
 632         if (!devc->enabled_channels)
 633                 return SR_ERR;
 634
 635         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 636                 sr_err("Invalid channel configuration specified!");
 637                 return SR_ERR_NA;
 638         }
 639
 640         /* Request data for the first enabled channel. */
 641         devc->current_channel = devc->enabled_channels;
 642         dlm_channel_data_request(sdi);
 643
 644         /* Call our callback when data comes in or after 5ms. */
 645         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 646                         dlm_data_receive, (void *)sdi);
 647
 648         return SR_OK;
 649 }
 650
 651 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 652 {
 653         struct dev_context *devc;
 654
 655         std_session_send_df_end(sdi);
 656
 657         devc = sdi->priv;
 658
 659         devc->num_frames = 0;
 660         g_slist_free(devc->enabled_channels);
 661         devc->enabled_channels = NULL;
 662
 663         sr_scpi_source_remove(sdi->session, sdi->conn);
 664
 665         return SR_OK;
 666 }
 667
 668 static struct sr_dev_driver yokogawa_dlm_driver_info = {
 669         .name = "yokogawa-dlm",
 670         .longname = "Yokogawa DL/DLM",
 671         .api_version = 1,
 672         .init = std_init,
 673         .cleanup = std_cleanup,
 674         .scan = scan,
 675         .dev_list = std_dev_list,
 676         .dev_clear = dev_clear,
 677         .config_get = config_get,
 678         .config_set = config_set,
 679         .config_channel_set = config_channel_set,
 680         .config_list = config_list,
 681         .dev_open = dev_open,
 682         .dev_close = dev_close,
 683         .dev_acquisition_start = dev_acquisition_start,
 684         .dev_acquisition_stop = dev_acquisition_stop,
 685         .context = NULL,
 686 };
 687 SR_REGISTER_DEV_DRIVER(yokogawa_dlm_driver_info);