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 SR_PRIV 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_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  47         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  48 };
  49
  50 static const uint32_t dlm_analog_devopts[] = {
  51         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  52         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  53         SR_CONF_NUM_VDIV | SR_CONF_GET,
  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 int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  67 {
  68         return std_init(sr_ctx, di, LOG_PREFIX);
  69 }
  70
  71 static struct sr_dev_inst *probe_usbtmc_device(struct sr_scpi_dev_inst *scpi)
  72 {
  73         struct sr_dev_inst *sdi;
  74         struct dev_context *devc;
  75         struct sr_scpi_hw_info *hw_info;
  76         char *model_name;
  77         int model_index;
  78
  79         sdi = NULL;
  80         devc = NULL;
  81         hw_info = NULL;
  82
  83         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  84                 sr_info("Couldn't get IDN response.");
  85                 goto fail;
  86         }
  87
  88         if (strcmp(hw_info->manufacturer, MANUFACTURER_ID) != 0)
  89                 goto fail;
  90
  91         if (dlm_model_get(hw_info->model, &model_name, &model_index) != SR_OK)
  92                 goto fail;
  93
  94         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  95         sdi->vendor = g_strdup(MANUFACTURER_NAME);
  96         sdi->model = g_strdup(model_name);
  97         sdi->version = g_strdup(hw_info->firmware_version);
  98
  99         sdi->serial_num = g_strdup(hw_info->serial_number);
 100
 101         sr_scpi_hw_info_free(hw_info);
 102         hw_info = NULL;
 103
 104         devc = g_malloc0(sizeof(struct dev_context));
 105
 106         sdi->driver = &yokogawa_dlm_driver_info;
 107         sdi->priv = devc;
 108         sdi->inst_type = SR_INST_SCPI;
 109         sdi->conn = scpi;
 110
 111         if (dlm_device_init(sdi, model_index) != SR_OK)
 112                 goto fail;
 113
 114         return sdi;
 115
 116 fail:
 117         if (hw_info)
 118                 sr_scpi_hw_info_free(hw_info);
 119         if (sdi)
 120                 sr_dev_inst_free(sdi);
 121         g_free(devc);
 122
 123         return NULL;
 124 }
 125
 126 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 127 {
 128         return sr_scpi_scan(di->context, options, probe_usbtmc_device);
 129 }
 130
 131 static GSList *dev_list(const struct sr_dev_driver *di)
 132 {
 133         return ((struct drv_context *)(di->context))->instances;
 134 }
 135
 136 static void clear_helper(void *priv)
 137 {
 138         struct dev_context *devc;
 139
 140         devc = priv;
 141
 142         dlm_scope_state_destroy(devc->model_state);
 143
 144         g_free(devc->analog_groups);
 145         g_free(devc->digital_groups);
 146         g_free(devc);
 147 }
 148
 149 static int dev_clear(const struct sr_dev_driver *di)
 150 {
 151         return std_dev_clear(di, clear_helper);
 152 }
 153
 154 static int dev_open(struct sr_dev_inst *sdi)
 155 {
 156         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 157                 return SR_ERR;
 158
 159         if (dlm_scope_state_query(sdi) != SR_OK)
 160                 return SR_ERR;
 161
 162         sdi->status = SR_ST_ACTIVE;
 163
 164         return SR_OK;
 165 }
 166
 167 static int dev_close(struct sr_dev_inst *sdi)
 168 {
 169         if (sdi->status == SR_ST_INACTIVE)
 170                 return SR_OK;
 171
 172         sr_scpi_close(sdi->conn);
 173
 174         sdi->status = SR_ST_INACTIVE;
 175
 176         return SR_OK;
 177 }
 178
 179 static int cleanup(const struct sr_dev_driver *di)
 180 {
 181         dev_clear(di);
 182
 183         return SR_OK;
 184 }
 185
 186 /**
 187  * Check which category a given channel group belongs to.
 188  *
 189  * @param devc Our internal device context.
 190  * @param cg The channel group to check.
 191  *
 192  * @retval CG_NONE cg is NULL
 193  * @retval CG_ANALOG cg is an analog group
 194  * @retval CG_DIGITAL cg is a digital group
 195  * @retval CG_INVALID cg is something else
 196  */
 197 static int check_channel_group(struct dev_context *devc,
 198                         const struct sr_channel_group *cg)
 199 {
 200         unsigned int i;
 201         const struct scope_config *model;
 202
 203         model = devc->model_config;
 204
 205         if (!cg)
 206                 return CG_NONE;
 207
 208         for (i = 0; i < model->analog_channels; i++)
 209                 if (cg == devc->analog_groups[i])
 210                         return CG_ANALOG;
 211
 212         for (i = 0; i < model->pods; i++)
 213                 if (cg == devc->digital_groups[i])
 214                         return CG_DIGITAL;
 215
 216         sr_err("Invalid channel group specified.");
 217         return CG_INVALID;
 218 }
 219
 220 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 221                 const struct sr_channel_group *cg)
 222 {
 223         int ret, cg_type;
 224         unsigned int i;
 225         struct dev_context *devc;
 226         const struct scope_config *model;
 227         struct scope_state *state;
 228
 229         if (!sdi || !(devc = sdi->priv))
 230                 return SR_ERR_ARG;
 231
 232         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 233                 return SR_ERR;
 234
 235         model = devc->model_config;
 236         state = devc->model_state;
 237
 238         switch (key) {
 239         case SR_CONF_NUM_HDIV:
 240                 *data = g_variant_new_int32(model->num_xdivs);
 241                 ret = SR_OK;
 242                 break;
 243         case SR_CONF_TIMEBASE:
 244                 *data = g_variant_new("(tt)",
 245                                 dlm_timebases[state->timebase][0],
 246                                 dlm_timebases[state->timebase][1]);
 247                 ret = SR_OK;
 248                 break;
 249         case SR_CONF_NUM_VDIV:
 250                 if (cg_type == CG_NONE) {
 251                         sr_err("No channel group specified.");
 252                         return SR_ERR_CHANNEL_GROUP;
 253                 } else if (cg_type == CG_ANALOG) {
 254                                 *data = g_variant_new_int32(model->num_ydivs);
 255                                 ret = SR_OK;
 256                                 break;
 257                 } else {
 258                         ret = SR_ERR_NA;
 259                 }
 260                 break;
 261         case SR_CONF_VDIV:
 262                 ret = SR_ERR_NA;
 263                 if (cg_type == CG_NONE) {
 264                         sr_err("No channel group specified.");
 265                         return SR_ERR_CHANNEL_GROUP;
 266                 } else if (cg_type != CG_ANALOG)
 267                         break;
 268
 269                 for (i = 0; i < model->analog_channels; i++) {
 270                         if (cg != devc->analog_groups[i])
 271                                 continue;
 272                         *data = g_variant_new("(tt)",
 273                                         dlm_vdivs[state->analog_states[i].vdiv][0],
 274                                         dlm_vdivs[state->analog_states[i].vdiv][1]);
 275                         ret = SR_OK;
 276                         break;
 277                 }
 278                 break;
 279         case SR_CONF_TRIGGER_SOURCE:
 280                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 281                 ret = SR_OK;
 282                 break;
 283         case SR_CONF_TRIGGER_SLOPE:
 284                 *data = g_variant_new_string(dlm_trigger_slopes[state->trigger_slope]);
 285                 ret = SR_OK;
 286                 break;
 287         case SR_CONF_HORIZ_TRIGGERPOS:
 288                 *data = g_variant_new_double(state->horiz_triggerpos);
 289                 ret = SR_OK;
 290                 break;
 291         case SR_CONF_COUPLING:
 292                 ret = SR_ERR_NA;
 293                 if (cg_type == CG_NONE) {
 294                         sr_err("No channel group specified.");
 295                         return SR_ERR_CHANNEL_GROUP;
 296                 } else if (cg_type != CG_ANALOG)
 297                         break;
 298
 299                 for (i = 0; i < model->analog_channels; i++) {
 300                         if (cg != devc->analog_groups[i])
 301                                 continue;
 302                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 303                         ret = SR_OK;
 304                         break;
 305                 }
 306                 break;
 307         case SR_CONF_SAMPLERATE:
 308                 *data = g_variant_new_uint64(state->sample_rate);
 309                 ret = SR_OK;
 310                 break;
 311         default:
 312                 ret = SR_ERR_NA;
 313         }
 314
 315         return ret;
 316 }
 317
 318 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 319 {
 320         unsigned int i;
 321         GVariant *rational[2];
 322         GVariantBuilder gvb;
 323
 324         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 325
 326         for (i = 0; i < n; i++) {
 327                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 328                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 329
 330                 /* FIXME: Valgrind reports a memory leak here. */
 331                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 332         }
 333
 334         return g_variant_builder_end(&gvb);
 335 }
 336
 337 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 338                 const struct sr_channel_group *cg)
 339 {
 340         int ret, cg_type;
 341         unsigned int i, j;
 342         char float_str[30];
 343         struct dev_context *devc;
 344         const struct scope_config *model;
 345         struct scope_state *state;
 346         const char *tmp;
 347         uint64_t p, q;
 348         double tmp_d;
 349         gboolean update_sample_rate;
 350
 351         if (!sdi || !(devc = sdi->priv))
 352                 return SR_ERR_ARG;
 353
 354         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 355                 return SR_ERR;
 356
 357         model = devc->model_config;
 358         state = devc->model_state;
 359         update_sample_rate = FALSE;
 360
 361         ret = SR_ERR_NA;
 362
 363         switch (key) {
 364         case SR_CONF_LIMIT_FRAMES:
 365                 devc->frame_limit = g_variant_get_uint64(data);
 366                 ret = SR_OK;
 367                 break;
 368         case SR_CONF_TRIGGER_SOURCE:
 369                 tmp = g_variant_get_string(data, NULL);
 370                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 371                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 372                                 continue;
 373                         state->trigger_source = i;
 374                         /* TODO: A and B trigger support possible? */
 375                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 376                         break;
 377                 }
 378                 break;
 379         case SR_CONF_VDIV:
 380                 if (cg_type == CG_NONE) {
 381                         sr_err("No channel group specified.");
 382                         return SR_ERR_CHANNEL_GROUP;
 383                 }
 384
 385                 g_variant_get(data, "(tt)", &p, &q);
 386
 387                 for (i = 0; i < ARRAY_SIZE(dlm_vdivs); i++) {
 388                         if (p != dlm_vdivs[i][0] ||
 389                                         q != dlm_vdivs[i][1])
 390                                 continue;
 391                         for (j = 1; j <= model->analog_channels; j++) {
 392                                 if (cg != devc->analog_groups[j - 1])
 393                                         continue;
 394                                 state->analog_states[j - 1].vdiv = i;
 395                                 g_ascii_formatd(float_str, sizeof(float_str),
 396                                                 "%E", (float) p / q);
 397                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 398                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 399                                         return SR_ERR;
 400
 401                                 break;
 402                         }
 403
 404                         ret = SR_OK;
 405                         break;
 406                 }
 407                 break;
 408         case SR_CONF_TIMEBASE:
 409                 g_variant_get(data, "(tt)", &p, &q);
 410
 411                 for (i = 0; i < ARRAY_SIZE(dlm_timebases); i++) {
 412                         if (p != dlm_timebases[i][0] ||
 413                                         q != dlm_timebases[i][1])
 414                                 continue;
 415                         state->timebase = i;
 416                         g_ascii_formatd(float_str, sizeof(float_str),
 417                                         "%E", (float) p / q);
 418                         ret = dlm_timebase_set(sdi->conn, float_str);
 419                         update_sample_rate = TRUE;
 420                         break;
 421                 }
 422                 break;
 423         case SR_CONF_HORIZ_TRIGGERPOS:
 424                 tmp_d = g_variant_get_double(data);
 425
 426                 /* TODO: Check if the calculation makes sense for the DLM. */
 427                 if (tmp_d < 0.0 || tmp_d > 1.0)
 428                         return SR_ERR;
 429
 430                 state->horiz_triggerpos = tmp_d;
 431                 tmp_d = -(tmp_d - 0.5) *
 432                                 ((double) dlm_timebases[state->timebase][0] /
 433                                 dlm_timebases[state->timebase][1])
 434                                 * model->num_xdivs;
 435
 436                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 437                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 438                 break;
 439         case SR_CONF_TRIGGER_SLOPE:
 440                 tmp = g_variant_get_string(data, NULL);
 441
 442                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 443                         return SR_ERR_ARG;
 444
 445                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 446                 state->trigger_slope = (tmp[0] == 'r') ?
 447                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 448
 449                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 450                 break;
 451         case SR_CONF_COUPLING:
 452                 if (cg_type == CG_NONE) {
 453                         sr_err("No channel group specified.");
 454                         return SR_ERR_CHANNEL_GROUP;
 455                 }
 456
 457                 tmp = g_variant_get_string(data, NULL);
 458
 459                 for (i = 0; (*model->coupling_options)[i]; i++) {
 460                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 461                                 continue;
 462                         for (j = 1; j <= model->analog_channels; j++) {
 463                                 if (cg != devc->analog_groups[j - 1])
 464                                         continue;
 465                                 state->analog_states[j-1].coupling = i;
 466
 467                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 468                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 469                                         return SR_ERR;
 470                                 break;
 471                         }
 472
 473                         ret = SR_OK;
 474                         break;
 475                 }
 476                 break;
 477         default:
 478                 ret = SR_ERR_NA;
 479                 break;
 480         }
 481
 482         if (ret == SR_OK)
 483                 ret = sr_scpi_get_opc(sdi->conn);
 484
 485         if (ret == SR_OK && update_sample_rate)
 486                 ret = dlm_sample_rate_query(sdi);
 487
 488         return ret;
 489 }
 490
 491 static int config_channel_set(const struct sr_dev_inst *sdi,
 492                         struct sr_channel *ch, unsigned int changes)
 493 {
 494         /* Currently we only handle SR_CHANNEL_SET_ENABLED. */
 495         if (changes != SR_CHANNEL_SET_ENABLED)
 496                 return SR_ERR_NA;
 497
 498         return dlm_channel_state_set(sdi, ch->index, ch->enabled);
 499 }
 500
 501 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 502                 const struct sr_channel_group *cg)
 503 {
 504         int cg_type = CG_NONE;
 505         struct dev_context *devc = NULL;
 506         const struct scope_config *model = NULL;
 507
 508         /* SR_CONF_SCAN_OPTIONS is always valid, regardless of sdi or probe group. */
 509         if (key == SR_CONF_SCAN_OPTIONS) {
 510                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 511                                 dlm_scanopts, ARRAY_SIZE(dlm_scanopts), sizeof(uint32_t));
 512                 return SR_OK;
 513         }
 514
 515         /* If sdi is NULL, nothing except SR_CONF_DEVICE_OPTIONS can be provided. */
 516         if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 517                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 518                                 dlm_drvopts, ARRAY_SIZE(dlm_drvopts), sizeof(uint32_t));
 519                 return SR_OK;
 520         }
 521
 522         if (!sdi)
 523                 return SR_ERR_ARG;
 524
 525         devc = sdi->priv;
 526         model = devc->model_config;
 527
 528         /*
 529          * If cg is NULL, only the SR_CONF_DEVICE_OPTIONS that are not
 530          * specific to a probe group must be returned.
 531          */
 532         if (!cg) {
 533                 switch (key) {
 534                 case SR_CONF_DEVICE_OPTIONS:
 535                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 536                                         dlm_devopts, ARRAY_SIZE(dlm_devopts), sizeof(uint32_t));
 537                         return SR_OK;
 538                 case SR_CONF_TIMEBASE:
 539                         *data = build_tuples(&dlm_timebases, ARRAY_SIZE(dlm_timebases));
 540                         return SR_OK;
 541                 case SR_CONF_TRIGGER_SOURCE:
 542                         if (!model)
 543                                 return SR_ERR_ARG;
 544                         *data = g_variant_new_strv(*model->trigger_sources,
 545                                         g_strv_length((char **)*model->trigger_sources));
 546                         return SR_OK;
 547                 case SR_CONF_TRIGGER_SLOPE:
 548                         *data = g_variant_new_strv(dlm_trigger_slopes,
 549                                         g_strv_length((char **)dlm_trigger_slopes));
 550                         return SR_OK;
 551                 case SR_CONF_NUM_HDIV:
 552                         *data = g_variant_new_uint32(model->num_xdivs);
 553                         return SR_OK;
 554                 default:
 555                         return SR_ERR_NA;
 556                 }
 557         }
 558
 559         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 560                 return SR_ERR;
 561
 562         switch (key) {
 563         case SR_CONF_DEVICE_OPTIONS:
 564                 if (cg_type == CG_ANALOG) {
 565                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 566                                 dlm_analog_devopts, ARRAY_SIZE(dlm_analog_devopts), sizeof(uint32_t));
 567                 } else if (cg_type == CG_DIGITAL) {
 568                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 569                                 dlm_digital_devopts, ARRAY_SIZE(dlm_digital_devopts), sizeof(uint32_t));
 570                 } else {
 571                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 572                                 NULL, 0, sizeof(uint32_t));
 573                 }
 574                 break;
 575         case SR_CONF_COUPLING:
 576                 if (cg_type == CG_NONE)
 577                         return SR_ERR_CHANNEL_GROUP;
 578                 *data = g_variant_new_strv(*model->coupling_options,
 579                                 g_strv_length((char **)*model->coupling_options));
 580                 break;
 581         case SR_CONF_VDIV:
 582                 if (cg_type == CG_NONE)
 583                         return SR_ERR_CHANNEL_GROUP;
 584                 *data = build_tuples(&dlm_vdivs, ARRAY_SIZE(dlm_vdivs));
 585                 break;
 586         default:
 587                 return SR_ERR_NA;
 588         }
 589
 590         return SR_OK;
 591 }
 592
 593 static int dlm_check_channels(GSList *channels)
 594 {
 595         GSList *l;
 596         struct sr_channel *ch;
 597         gboolean enabled_pod1, enabled_chan4;
 598
 599         enabled_pod1 = enabled_chan4 = FALSE;
 600
 601         /* Note: On the DLM2000, CH4 and Logic are shared. */
 602         /* TODO Handle non-DLM2000 models. */
 603         for (l = channels; l; l = l->next) {
 604                 ch = l->data;
 605                 switch (ch->type) {
 606                 case SR_CHANNEL_ANALOG:
 607                         if (ch->index == 3)
 608                                 enabled_chan4 = TRUE;
 609                         break;
 610                 case SR_CHANNEL_LOGIC:
 611                         enabled_pod1 = TRUE;
 612                         break;
 613                 default:
 614                         return SR_ERR;
 615                 }
 616         }
 617
 618         if (enabled_pod1 && enabled_chan4)
 619                 return SR_ERR;
 620
 621         return SR_OK;
 622 }
 623
 624 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 625 {
 626         GSList *l;
 627         gboolean digital_added;
 628         struct sr_channel *ch;
 629         struct dev_context *devc;
 630         struct sr_scpi_dev_inst *scpi;
 631
 632         (void)cb_data;
 633
 634         if (sdi->status != SR_ST_ACTIVE)
 635                 return SR_ERR_DEV_CLOSED;
 636
 637         scpi = sdi->conn;
 638         devc = sdi->priv;
 639         digital_added = FALSE;
 640
 641         g_slist_free(devc->enabled_channels);
 642         devc->enabled_channels = NULL;
 643
 644         for (l = sdi->channels; l; l = l->next) {
 645                 ch = l->data;
 646                 if (!ch->enabled)
 647                         continue;
 648                 /* Only add a single digital channel. */
 649                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 650                         devc->enabled_channels = g_slist_append(
 651                                 devc->enabled_channels, ch);
 652                         if (ch->type == SR_CHANNEL_LOGIC)
 653                                 digital_added = TRUE;
 654                 }
 655         }
 656
 657         if (!devc->enabled_channels)
 658                 return SR_ERR;
 659
 660         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 661                 sr_err("Invalid channel configuration specified!");
 662                 return SR_ERR_NA;
 663         }
 664
 665         /* Request data for the first enabled channel. */
 666         devc->current_channel = devc->enabled_channels;
 667         dlm_channel_data_request(sdi);
 668
 669         /* Call our callback when data comes in or after 5ms. */
 670         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 671                         dlm_data_receive, (void *)sdi);
 672
 673         return SR_OK;
 674 }
 675
 676 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 677 {
 678         struct dev_context *devc;
 679
 680         (void)cb_data;
 681
 682         std_session_send_df_end(sdi, LOG_PREFIX);
 683
 684         if (sdi->status != SR_ST_ACTIVE)
 685                 return SR_ERR_DEV_CLOSED;
 686
 687         devc = sdi->priv;
 688
 689         devc->num_frames = 0;
 690         g_slist_free(devc->enabled_channels);
 691         devc->enabled_channels = NULL;
 692
 693         sr_scpi_source_remove(sdi->session, sdi->conn);
 694
 695         return SR_OK;
 696 }
 697
 698 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info = {
 699         .name = "yokogawa-dlm",
 700         .longname = "Yokogawa DL/DLM",
 701         .api_version = 1,
 702         .init = init,
 703         .cleanup = cleanup,
 704         .scan = scan,
 705         .dev_list = dev_list,
 706         .dev_clear = dev_clear,
 707         .config_get = config_get,
 708         .config_set = config_set,
 709         .config_channel_set = config_channel_set,
 710         .config_list = config_list,
 711         .dev_open = dev_open,
 712         .dev_close = dev_close,
 713         .dev_acquisition_start = dev_acquisition_start,
 714         .dev_acquisition_stop = dev_acquisition_stop,
 715         .context = NULL,
 716 };