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