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->status = SR_ST_ACTIVE;
  96         sdi->vendor = g_strdup(MANUFACTURER_NAME);
  97         sdi->model = g_strdup(model_name);
  98         sdi->version = g_strdup(hw_info->firmware_version);
  99
 100         sdi->serial_num = g_strdup(hw_info->serial_number);
 101
 102         sr_scpi_hw_info_free(hw_info);
 103         hw_info = NULL;
 104
 105         devc = g_malloc0(sizeof(struct dev_context));
 106
 107         sdi->driver = &yokogawa_dlm_driver_info;
 108         sdi->priv = devc;
 109         sdi->inst_type = SR_INST_SCPI;
 110         sdi->conn = scpi;
 111
 112         if (dlm_device_init(sdi, model_index) != SR_OK)
 113                 goto fail;
 114
 115         sr_scpi_close(sdi->conn);
 116
 117         sdi->status = SR_ST_INACTIVE;
 118         return sdi;
 119
 120 fail:
 121         if (hw_info)
 122                 sr_scpi_hw_info_free(hw_info);
 123         if (sdi)
 124                 sr_dev_inst_free(sdi);
 125         g_free(devc);
 126
 127         return NULL;
 128 }
 129
 130 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 131 {
 132         return sr_scpi_scan(di->context, options, probe_usbtmc_device);
 133 }
 134
 135 static GSList *dev_list(const struct sr_dev_driver *di)
 136 {
 137         return ((struct drv_context *)(di->context))->instances;
 138 }
 139
 140 static void clear_helper(void *priv)
 141 {
 142         struct dev_context *devc;
 143
 144         devc = priv;
 145
 146         dlm_scope_state_destroy(devc->model_state);
 147
 148         g_free(devc->analog_groups);
 149         g_free(devc->digital_groups);
 150         g_free(devc);
 151 }
 152
 153 static int dev_clear(const struct sr_dev_driver *di)
 154 {
 155         return std_dev_clear(di, clear_helper);
 156 }
 157
 158 static int dev_open(struct sr_dev_inst *sdi)
 159 {
 160         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 161                 return SR_ERR;
 162
 163         if (dlm_scope_state_query(sdi) != SR_OK)
 164                 return SR_ERR;
 165
 166         sdi->status = SR_ST_ACTIVE;
 167
 168         return SR_OK;
 169 }
 170
 171 static int dev_close(struct sr_dev_inst *sdi)
 172 {
 173         if (sdi->status == SR_ST_INACTIVE)
 174                 return SR_OK;
 175
 176         sr_scpi_close(sdi->conn);
 177
 178         sdi->status = SR_ST_INACTIVE;
 179
 180         return SR_OK;
 181 }
 182
 183 static int cleanup(const struct sr_dev_driver *di)
 184 {
 185         dev_clear(di);
 186
 187         return SR_OK;
 188 }
 189
 190 /**
 191  * Check which category a given channel group belongs to.
 192  *
 193  * @param devc Our internal device context.
 194  * @param cg The channel group to check.
 195  *
 196  * @retval CG_NONE cg is NULL
 197  * @retval CG_ANALOG cg is an analog group
 198  * @retval CG_DIGITAL cg is a digital group
 199  * @retval CG_INVALID cg is something else
 200  */
 201 static int check_channel_group(struct dev_context *devc,
 202                         const struct sr_channel_group *cg)
 203 {
 204         unsigned int i;
 205         const struct scope_config *model;
 206
 207         model = devc->model_config;
 208
 209         if (!cg)
 210                 return CG_NONE;
 211
 212         for (i = 0; i < model->analog_channels; i++)
 213                 if (cg == devc->analog_groups[i])
 214                         return CG_ANALOG;
 215
 216         for (i = 0; i < model->pods; i++)
 217                 if (cg == devc->digital_groups[i])
 218                         return CG_DIGITAL;
 219
 220         sr_err("Invalid channel group specified.");
 221         return CG_INVALID;
 222 }
 223
 224 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 225                 const struct sr_channel_group *cg)
 226 {
 227         int ret, cg_type;
 228         unsigned int i;
 229         struct dev_context *devc;
 230         const struct scope_config *model;
 231         struct scope_state *state;
 232
 233         if (!sdi || !(devc = sdi->priv))
 234                 return SR_ERR_ARG;
 235
 236         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 237                 return SR_ERR;
 238
 239         ret = SR_ERR_NA;
 240         model = devc->model_config;
 241         state = devc->model_state;
 242
 243         switch (key) {
 244         case SR_CONF_NUM_HDIV:
 245                 *data = g_variant_new_int32(model->num_xdivs);
 246                 ret = SR_OK;
 247                 break;
 248         case SR_CONF_TIMEBASE:
 249                 *data = g_variant_new("(tt)",
 250                                 dlm_timebases[state->timebase][0],
 251                                 dlm_timebases[state->timebase][1]);
 252                 ret = SR_OK;
 253                 break;
 254         case SR_CONF_NUM_VDIV:
 255                 if (cg_type == CG_NONE) {
 256                         sr_err("No channel group specified.");
 257                         return SR_ERR_CHANNEL_GROUP;
 258                 } else if (cg_type == CG_ANALOG) {
 259                                 *data = g_variant_new_int32(model->num_ydivs);
 260                                 ret = SR_OK;
 261                                 break;
 262                 } else {
 263                         ret = SR_ERR_NA;
 264                 }
 265                 break;
 266         case SR_CONF_VDIV:
 267                 ret = SR_ERR_NA;
 268                 if (cg_type == CG_NONE) {
 269                         sr_err("No channel group specified.");
 270                         return SR_ERR_CHANNEL_GROUP;
 271                 } else if (cg_type != CG_ANALOG)
 272                         break;
 273
 274                 for (i = 0; i < model->analog_channels; i++) {
 275                         if (cg != devc->analog_groups[i])
 276                                 continue;
 277                         *data = g_variant_new("(tt)",
 278                                         dlm_vdivs[state->analog_states[i].vdiv][0],
 279                                         dlm_vdivs[state->analog_states[i].vdiv][1]);
 280                         ret = SR_OK;
 281                         break;
 282                 }
 283                 break;
 284         case SR_CONF_TRIGGER_SOURCE:
 285                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 286                 ret = SR_OK;
 287                 break;
 288         case SR_CONF_TRIGGER_SLOPE:
 289                 *data = g_variant_new_string(dlm_trigger_slopes[state->trigger_slope]);
 290                 ret = SR_OK;
 291                 break;
 292         case SR_CONF_HORIZ_TRIGGERPOS:
 293                 *data = g_variant_new_double(state->horiz_triggerpos);
 294                 ret = SR_OK;
 295                 break;
 296         case SR_CONF_COUPLING:
 297                 ret = SR_ERR_NA;
 298                 if (cg_type == CG_NONE) {
 299                         sr_err("No channel group specified.");
 300                         return SR_ERR_CHANNEL_GROUP;
 301                 } else if (cg_type != CG_ANALOG)
 302                         break;
 303
 304                 for (i = 0; i < model->analog_channels; i++) {
 305                         if (cg != devc->analog_groups[i])
 306                                 continue;
 307                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 308                         ret = SR_OK;
 309                         break;
 310                 }
 311                 break;
 312         case SR_CONF_SAMPLERATE:
 313                 *data = g_variant_new_uint64(state->sample_rate);
 314                 ret = SR_OK;
 315                 break;
 316         default:
 317                 ret = SR_ERR_NA;
 318         }
 319
 320         return ret;
 321 }
 322
 323 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 324 {
 325         unsigned int i;
 326         GVariant *rational[2];
 327         GVariantBuilder gvb;
 328
 329         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 330
 331         for (i = 0; i < n; i++) {
 332                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 333                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 334
 335                 /* FIXME: Valgrind reports a memory leak here. */
 336                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 337         }
 338
 339         return g_variant_builder_end(&gvb);
 340 }
 341
 342 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 343                 const struct sr_channel_group *cg)
 344 {
 345         int ret, cg_type;
 346         unsigned int i, j;
 347         char float_str[30];
 348         struct dev_context *devc;
 349         const struct scope_config *model;
 350         struct scope_state *state;
 351         const char *tmp;
 352         uint64_t p, q;
 353         double tmp_d;
 354         gboolean update_sample_rate;
 355
 356         if (!sdi || !(devc = sdi->priv))
 357                 return SR_ERR_ARG;
 358
 359         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 360                 return SR_ERR;
 361
 362         model = devc->model_config;
 363         state = devc->model_state;
 364         update_sample_rate = FALSE;
 365
 366         ret = SR_ERR_NA;
 367
 368         switch (key) {
 369         case SR_CONF_LIMIT_FRAMES:
 370                 devc->frame_limit = g_variant_get_uint64(data);
 371                 ret = SR_OK;
 372                 break;
 373         case SR_CONF_TRIGGER_SOURCE:
 374                 tmp = g_variant_get_string(data, NULL);
 375                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 376                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 377                                 continue;
 378                         state->trigger_source = i;
 379                         /* TODO: A and B trigger support possible? */
 380                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 381                         break;
 382                 }
 383                 break;
 384         case SR_CONF_VDIV:
 385                 if (cg_type == CG_NONE) {
 386                         sr_err("No channel group specified.");
 387                         return SR_ERR_CHANNEL_GROUP;
 388                 }
 389
 390                 g_variant_get(data, "(tt)", &p, &q);
 391
 392                 for (i = 0; i < ARRAY_SIZE(dlm_vdivs); i++) {
 393                         if (p != dlm_vdivs[i][0] ||
 394                                         q != dlm_vdivs[i][1])
 395                                 continue;
 396                         for (j = 1; j <= model->analog_channels; j++) {
 397                                 if (cg != devc->analog_groups[j - 1])
 398                                         continue;
 399                                 state->analog_states[j - 1].vdiv = i;
 400                                 g_ascii_formatd(float_str, sizeof(float_str),
 401                                                 "%E", (float) p / q);
 402                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 403                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 404                                         return SR_ERR;
 405
 406                                 break;
 407                         }
 408
 409                         ret = SR_OK;
 410                         break;
 411                 }
 412                 break;
 413         case SR_CONF_TIMEBASE:
 414                 g_variant_get(data, "(tt)", &p, &q);
 415
 416                 for (i = 0; i < ARRAY_SIZE(dlm_timebases); i++) {
 417                         if (p != dlm_timebases[i][0] ||
 418                                         q != dlm_timebases[i][1])
 419                                 continue;
 420                         state->timebase = i;
 421                         g_ascii_formatd(float_str, sizeof(float_str),
 422                                         "%E", (float) p / q);
 423                         ret = dlm_timebase_set(sdi->conn, float_str);
 424                         update_sample_rate = TRUE;
 425                         break;
 426                 }
 427                 break;
 428         case SR_CONF_HORIZ_TRIGGERPOS:
 429                 tmp_d = g_variant_get_double(data);
 430
 431                 /* TODO: Check if the calculation makes sense for the DLM. */
 432                 if (tmp_d < 0.0 || tmp_d > 1.0)
 433                         return SR_ERR;
 434
 435                 state->horiz_triggerpos = tmp_d;
 436                 tmp_d = -(tmp_d - 0.5) *
 437                                 ((double) dlm_timebases[state->timebase][0] /
 438                                 dlm_timebases[state->timebase][1])
 439                                 * model->num_xdivs;
 440
 441                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 442                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 443                 break;
 444         case SR_CONF_TRIGGER_SLOPE:
 445                 tmp = g_variant_get_string(data, NULL);
 446
 447                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 448                         return SR_ERR_ARG;
 449
 450                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 451                 state->trigger_slope = (tmp[0] == 'r') ?
 452                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 453
 454                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 455                 break;
 456         case SR_CONF_COUPLING:
 457                 if (cg_type == CG_NONE) {
 458                         sr_err("No channel group specified.");
 459                         return SR_ERR_CHANNEL_GROUP;
 460                 }
 461
 462                 tmp = g_variant_get_string(data, NULL);
 463
 464                 for (i = 0; (*model->coupling_options)[i]; i++) {
 465                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 466                                 continue;
 467                         for (j = 1; j <= model->analog_channels; j++) {
 468                                 if (cg != devc->analog_groups[j - 1])
 469                                         continue;
 470                                 state->analog_states[j-1].coupling = i;
 471
 472                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 473                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 474                                         return SR_ERR;
 475                                 break;
 476                         }
 477
 478                         ret = SR_OK;
 479                         break;
 480                 }
 481                 break;
 482         default:
 483                 ret = SR_ERR_NA;
 484                 break;
 485         }
 486
 487         if (ret == SR_OK)
 488                 ret = sr_scpi_get_opc(sdi->conn);
 489
 490         if (ret == SR_OK && update_sample_rate)
 491                 ret = dlm_sample_rate_query(sdi);
 492
 493         return ret;
 494 }
 495
 496 static int config_channel_set(const struct sr_dev_inst *sdi,
 497                         struct sr_channel *ch, unsigned int changes)
 498 {
 499         /* Currently we only handle SR_CHANNEL_SET_ENABLED. */
 500         if (changes != SR_CHANNEL_SET_ENABLED)
 501                 return SR_ERR_NA;
 502
 503         return dlm_channel_state_set(sdi, ch->index, ch->enabled);
 504 }
 505
 506 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 507                 const struct sr_channel_group *cg)
 508 {
 509         int cg_type = CG_NONE;
 510         struct dev_context *devc = NULL;
 511         const struct scope_config *model = NULL;
 512
 513         /* SR_CONF_SCAN_OPTIONS is always valid, regardless of sdi or probe group. */
 514         if (key == SR_CONF_SCAN_OPTIONS) {
 515                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 516                                 dlm_scanopts, ARRAY_SIZE(dlm_scanopts), sizeof(uint32_t));
 517                 return SR_OK;
 518         }
 519
 520         /* If sdi is NULL, nothing except SR_CONF_DEVICE_OPTIONS can be provided. */
 521         if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 522                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 523                                 dlm_drvopts, ARRAY_SIZE(dlm_drvopts), sizeof(uint32_t));
 524                 return SR_OK;
 525         }
 526
 527         if (!sdi)
 528                 return SR_ERR_ARG;
 529
 530         devc = sdi->priv;
 531         model = devc->model_config;
 532
 533         /*
 534          * If cg is NULL, only the SR_CONF_DEVICE_OPTIONS that are not
 535          * specific to a probe group must be returned.
 536          */
 537         if (!cg) {
 538                 switch (key) {
 539                 case SR_CONF_DEVICE_OPTIONS:
 540                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 541                                         dlm_devopts, ARRAY_SIZE(dlm_devopts), sizeof(uint32_t));
 542                         return SR_OK;
 543                 case SR_CONF_TIMEBASE:
 544                         *data = build_tuples(&dlm_timebases, ARRAY_SIZE(dlm_timebases));
 545                         return SR_OK;
 546                 case SR_CONF_TRIGGER_SOURCE:
 547                         if (!model)
 548                                 return SR_ERR_ARG;
 549                         *data = g_variant_new_strv(*model->trigger_sources,
 550                                         g_strv_length((char **)*model->trigger_sources));
 551                         return SR_OK;
 552                 case SR_CONF_TRIGGER_SLOPE:
 553                         *data = g_variant_new_strv(dlm_trigger_slopes,
 554                                         g_strv_length((char **)dlm_trigger_slopes));
 555                         return SR_OK;
 556                 case SR_CONF_NUM_HDIV:
 557                         *data = g_variant_new_uint32(model->num_xdivs);
 558                         return SR_OK;
 559                 default:
 560                         return SR_ERR_NA;
 561                 }
 562         }
 563
 564         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 565                 return SR_ERR;
 566
 567         switch (key) {
 568         case SR_CONF_DEVICE_OPTIONS:
 569                 if (cg_type == CG_ANALOG) {
 570                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 571                                 dlm_analog_devopts, ARRAY_SIZE(dlm_analog_devopts), sizeof(uint32_t));
 572                 } else if (cg_type == CG_DIGITAL) {
 573                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 574                                 dlm_digital_devopts, ARRAY_SIZE(dlm_digital_devopts), sizeof(uint32_t));
 575                 } else {
 576                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 577                                 NULL, 0, sizeof(uint32_t));
 578                 }
 579                 break;
 580         case SR_CONF_COUPLING:
 581                 if (cg_type == CG_NONE)
 582                         return SR_ERR_CHANNEL_GROUP;
 583                 *data = g_variant_new_strv(*model->coupling_options,
 584                                 g_strv_length((char **)*model->coupling_options));
 585                 break;
 586         case SR_CONF_VDIV:
 587                 if (cg_type == CG_NONE)
 588                         return SR_ERR_CHANNEL_GROUP;
 589                 *data = build_tuples(&dlm_vdivs, ARRAY_SIZE(dlm_vdivs));
 590                 break;
 591         default:
 592                 return SR_ERR_NA;
 593         }
 594
 595         return SR_OK;
 596 }
 597
 598 static int dlm_check_channels(GSList *channels)
 599 {
 600         GSList *l;
 601         struct sr_channel *ch;
 602         gboolean enabled_pod1, enabled_chan4;
 603
 604         enabled_pod1 = enabled_chan4 = FALSE;
 605
 606         /* Note: On the DLM2000, CH4 and Logic are shared. */
 607         /* TODO Handle non-DLM2000 models. */
 608         for (l = channels; l; l = l->next) {
 609                 ch = l->data;
 610                 switch (ch->type) {
 611                 case SR_CHANNEL_ANALOG:
 612                         if (ch->index == 3)
 613                                 enabled_chan4 = TRUE;
 614                         break;
 615                 case SR_CHANNEL_LOGIC:
 616                         enabled_pod1 = TRUE;
 617                         break;
 618                 default:
 619                         return SR_ERR;
 620                 }
 621         }
 622
 623         if (enabled_pod1 && enabled_chan4)
 624                 return SR_ERR;
 625
 626         return SR_OK;
 627 }
 628
 629 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 630 {
 631         GSList *l;
 632         gboolean digital_added;
 633         struct sr_channel *ch;
 634         struct dev_context *devc;
 635         struct sr_scpi_dev_inst *scpi;
 636
 637         (void)cb_data;
 638
 639         if (sdi->status != SR_ST_ACTIVE)
 640                 return SR_ERR_DEV_CLOSED;
 641
 642         scpi = sdi->conn;
 643         devc = sdi->priv;
 644         digital_added = FALSE;
 645
 646         g_slist_free(devc->enabled_channels);
 647         devc->enabled_channels = NULL;
 648
 649         for (l = sdi->channels; l; l = l->next) {
 650                 ch = l->data;
 651                 if (!ch->enabled)
 652                         continue;
 653                 /* Only add a single digital channel. */
 654                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 655                         devc->enabled_channels = g_slist_append(
 656                                 devc->enabled_channels, ch);
 657                         if (ch->type == SR_CHANNEL_LOGIC)
 658                                 digital_added = TRUE;
 659                 }
 660         }
 661
 662         if (!devc->enabled_channels)
 663                 return SR_ERR;
 664
 665         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 666                 sr_err("Invalid channel configuration specified!");
 667                 return SR_ERR_NA;
 668         }
 669
 670         /* Request data for the first enabled channel. */
 671         devc->current_channel = devc->enabled_channels;
 672         dlm_channel_data_request(sdi);
 673
 674         /* Call our callback when data comes in or after 5ms. */
 675         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 676                         dlm_data_receive, (void *)sdi);
 677
 678         return SR_OK;
 679 }
 680
 681 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 682 {
 683         struct dev_context *devc;
 684         struct sr_datafeed_packet packet;
 685
 686         (void)cb_data;
 687
 688         packet.type = SR_DF_END;
 689         packet.payload = NULL;
 690         sr_session_send(sdi, &packet);
 691
 692         if (sdi->status != SR_ST_ACTIVE)
 693                 return SR_ERR_DEV_CLOSED;
 694
 695         devc = sdi->priv;
 696
 697         devc->num_frames = 0;
 698         g_slist_free(devc->enabled_channels);
 699         devc->enabled_channels = NULL;
 700
 701         sr_scpi_source_remove(sdi->session, sdi->conn);
 702
 703         return SR_OK;
 704 }
 705
 706 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info = {
 707         .name = "yokogawa-dlm",
 708         .longname = "Yokogawa DL/DLM",
 709         .api_version = 1,
 710         .init = init,
 711         .cleanup = cleanup,
 712         .scan = scan,
 713         .dev_list = dev_list,
 714         .dev_clear = dev_clear,
 715         .config_get = config_get,
 716         .config_set = config_set,
 717         .config_channel_set = config_channel_set,
 718         .config_list = config_list,
 719         .dev_open = dev_open,
 720         .dev_close = dev_close,
 721         .dev_acquisition_start = dev_acquisition_start,
 722         .dev_acquisition_stop = dev_acquisition_stop,
 723         .context = NULL,
 724 };