src/hardware/yokogawa-dlm/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 abraxa (Soeren Apel) <soeren@apelpie.net>
   5  * Based on the Hameg HMO driver by poljar (Damir Jelić) <poljarinho@gmail.com>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <stdlib.h>
  22 #include "protocol.h"
  23
  24 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info;
  25
  26 static const char *MANUFACTURER_ID = "YOKOGAWA";
  27 static const char *MANUFACTURER_NAME = "Yokogawa";
  28
  29 static const uint32_t dlm_scanopts[] = {
  30         SR_CONF_CONN,
  31 };
  32
  33 static const uint32_t dlm_drvopts[] = {
  34         SR_CONF_LOGIC_ANALYZER,
  35         SR_CONF_OSCILLOSCOPE,
  36 };
  37
  38 static const uint32_t dlm_devopts[] = {
  39         SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
  40         SR_CONF_SAMPLERATE | SR_CONF_GET,
  41         SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  42         SR_CONF_NUM_HDIV | SR_CONF_GET,
  43         SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
  44         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  45         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  46 };
  47
  48 static const uint32_t dlm_analog_devopts[] = {
  49         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  50         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  51         SR_CONF_NUM_VDIV | SR_CONF_GET,
  52 };
  53
  54 static const uint32_t dlm_digital_devopts[] = {
  55 };
  56
  57 enum {
  58         CG_INVALID = -1,
  59         CG_NONE,
  60         CG_ANALOG,
  61         CG_DIGITAL,
  62 };
  63
  64 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  65 {
  66         return std_init(sr_ctx, di, LOG_PREFIX);
  67 }
  68
  69 static struct sr_dev_inst *probe_usbtmc_device(struct sr_scpi_dev_inst *scpi)
  70 {
  71         struct sr_dev_inst *sdi;
  72         struct dev_context *devc;
  73         struct sr_scpi_hw_info *hw_info;
  74         char *model_name;
  75         int model_index;
  76
  77         sdi = NULL;
  78         devc = NULL;
  79         hw_info = NULL;
  80
  81         if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
  82                 sr_info("Couldn't get IDN response.");
  83                 goto fail;
  84         }
  85
  86         if (strcmp(hw_info->manufacturer, MANUFACTURER_ID) != 0)
  87                 goto fail;
  88
  89         if (dlm_model_get(hw_info->model, &model_name, &model_index) != SR_OK)
  90                 goto fail;
  91
  92         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  93         sdi->status = SR_ST_ACTIVE;
  94         sdi->vendor = g_strdup(MANUFACTURER_NAME);
  95         sdi->model = g_strdup(model_name);
  96         sdi->version = g_strdup(hw_info->firmware_version);
  97
  98         sdi->serial_num = g_strdup(hw_info->serial_number);
  99
 100         sr_scpi_hw_info_free(hw_info);
 101         hw_info = NULL;
 102
 103         devc = g_malloc0(sizeof(struct dev_context));
 104
 105         sdi->driver = &yokogawa_dlm_driver_info;
 106         sdi->priv = devc;
 107         sdi->inst_type = SR_INST_SCPI;
 108         sdi->conn = scpi;
 109
 110         if (dlm_device_init(sdi, model_index) != SR_OK)
 111                 goto fail;
 112
 113         sr_scpi_close(sdi->conn);
 114
 115         sdi->status = SR_ST_INACTIVE;
 116         return sdi;
 117
 118 fail:
 119         if (hw_info)
 120                 sr_scpi_hw_info_free(hw_info);
 121         if (sdi)
 122                 sr_dev_inst_free(sdi);
 123         g_free(devc);
 124
 125         return NULL;
 126 }
 127
 128 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 129 {
 130         return sr_scpi_scan(di->context, options, probe_usbtmc_device);
 131 }
 132
 133 static GSList *dev_list(const struct sr_dev_driver *di)
 134 {
 135         return ((struct drv_context *)(di->context))->instances;
 136 }
 137
 138 static void clear_helper(void *priv)
 139 {
 140         struct dev_context *devc;
 141
 142         devc = priv;
 143
 144         dlm_scope_state_destroy(devc->model_state);
 145
 146         g_free(devc->analog_groups);
 147         g_free(devc->digital_groups);
 148         g_free(devc);
 149 }
 150
 151 static int dev_clear(const struct sr_dev_driver *di)
 152 {
 153         return std_dev_clear(di, clear_helper);
 154 }
 155
 156 static int dev_open(struct sr_dev_inst *sdi)
 157 {
 158         if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
 159                 return SR_ERR;
 160
 161         if (dlm_scope_state_query(sdi) != SR_OK)
 162                 return SR_ERR;
 163
 164         sdi->status = SR_ST_ACTIVE;
 165
 166         return SR_OK;
 167 }
 168
 169 static int dev_close(struct sr_dev_inst *sdi)
 170 {
 171         if (sdi->status == SR_ST_INACTIVE)
 172                 return SR_OK;
 173
 174         sr_scpi_close(sdi->conn);
 175
 176         sdi->status = SR_ST_INACTIVE;
 177
 178         return SR_OK;
 179 }
 180
 181 static int cleanup(const struct sr_dev_driver *di)
 182 {
 183         dev_clear(di);
 184
 185         return SR_OK;
 186 }
 187
 188 /**
 189  * Check which category a given channel group belongs to.
 190  *
 191  * @param devc Our internal device context.
 192  * @param cg The channel group to check.
 193  *
 194  * @retval CG_NONE cg is NULL
 195  * @retval CG_ANALOG cg is an analog group
 196  * @retval CG_DIGITAL cg is a digital group
 197  * @retval CG_INVALID cg is something else
 198  */
 199 static int check_channel_group(struct dev_context *devc,
 200                         const struct sr_channel_group *cg)
 201 {
 202         unsigned int i;
 203         const struct scope_config *model;
 204
 205         model = devc->model_config;
 206
 207         if (!cg)
 208                 return CG_NONE;
 209
 210         for (i = 0; i < model->analog_channels; i++)
 211                 if (cg == devc->analog_groups[i])
 212                         return CG_ANALOG;
 213
 214         for (i = 0; i < model->pods; i++)
 215                 if (cg == devc->digital_groups[i])
 216                         return CG_DIGITAL;
 217
 218         sr_err("Invalid channel group specified.");
 219         return CG_INVALID;
 220 }
 221
 222 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 223                 const struct sr_channel_group *cg)
 224 {
 225         int ret, cg_type;
 226         unsigned int i;
 227         struct dev_context *devc;
 228         const struct scope_config *model;
 229         struct scope_state *state;
 230
 231         if (!sdi || !(devc = sdi->priv))
 232                 return SR_ERR_ARG;
 233
 234         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 235                 return SR_ERR;
 236
 237         ret = SR_ERR_NA;
 238         model = devc->model_config;
 239         state = devc->model_state;
 240
 241         switch (key) {
 242         case SR_CONF_NUM_HDIV:
 243                 *data = g_variant_new_int32(model->num_xdivs);
 244                 ret = SR_OK;
 245                 break;
 246         case SR_CONF_TIMEBASE:
 247                 *data = g_variant_new("(tt)",
 248                                 dlm_timebases[state->timebase][0],
 249                                 dlm_timebases[state->timebase][1]);
 250                 ret = SR_OK;
 251                 break;
 252         case SR_CONF_NUM_VDIV:
 253                 if (cg_type == CG_NONE) {
 254                         sr_err("No channel group specified.");
 255                         return SR_ERR_CHANNEL_GROUP;
 256                 } else if (cg_type == CG_ANALOG) {
 257                                 *data = g_variant_new_int32(model->num_ydivs);
 258                                 ret = SR_OK;
 259                                 break;
 260                 } else {
 261                         ret = SR_ERR_NA;
 262                 }
 263                 break;
 264         case SR_CONF_VDIV:
 265                 ret = SR_ERR_NA;
 266                 if (cg_type == CG_NONE) {
 267                         sr_err("No channel group specified.");
 268                         return SR_ERR_CHANNEL_GROUP;
 269                 } else if (cg_type != CG_ANALOG)
 270                         break;
 271
 272                 for (i = 0; i < model->analog_channels; i++) {
 273                         if (cg != devc->analog_groups[i])
 274                                 continue;
 275                         *data = g_variant_new("(tt)",
 276                                         dlm_vdivs[state->analog_states[i].vdiv][0],
 277                                         dlm_vdivs[state->analog_states[i].vdiv][1]);
 278                         ret = SR_OK;
 279                         break;
 280                 }
 281                 break;
 282         case SR_CONF_TRIGGER_SOURCE:
 283                 *data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
 284                 ret = SR_OK;
 285                 break;
 286         case SR_CONF_TRIGGER_SLOPE:
 287                 *data = g_variant_new_string(dlm_trigger_slopes[state->trigger_slope]);
 288                 ret = SR_OK;
 289                 break;
 290         case SR_CONF_HORIZ_TRIGGERPOS:
 291                 *data = g_variant_new_double(state->horiz_triggerpos);
 292                 ret = SR_OK;
 293                 break;
 294         case SR_CONF_COUPLING:
 295                 ret = SR_ERR_NA;
 296                 if (cg_type == CG_NONE) {
 297                         sr_err("No channel group specified.");
 298                         return SR_ERR_CHANNEL_GROUP;
 299                 } else if (cg_type != CG_ANALOG)
 300                         break;
 301
 302                 for (i = 0; i < model->analog_channels; i++) {
 303                         if (cg != devc->analog_groups[i])
 304                                 continue;
 305                         *data = g_variant_new_string((*model->coupling_options)[state->analog_states[i].coupling]);
 306                         ret = SR_OK;
 307                         break;
 308                 }
 309                 break;
 310         case SR_CONF_SAMPLERATE:
 311                 *data = g_variant_new_uint64(state->sample_rate);
 312                 ret = SR_OK;
 313                 break;
 314         default:
 315                 ret = SR_ERR_NA;
 316         }
 317
 318         return ret;
 319 }
 320
 321 static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 322 {
 323         unsigned int i;
 324         GVariant *rational[2];
 325         GVariantBuilder gvb;
 326
 327         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 328
 329         for (i = 0; i < n; i++) {
 330                 rational[0] = g_variant_new_uint64((*array)[i][0]);
 331                 rational[1] = g_variant_new_uint64((*array)[i][1]);
 332
 333                 /* FIXME: Valgrind reports a memory leak here. */
 334                 g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
 335         }
 336
 337         return g_variant_builder_end(&gvb);
 338 }
 339
 340 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 341                 const struct sr_channel_group *cg)
 342 {
 343         int ret, cg_type;
 344         unsigned int i, j;
 345         char float_str[30];
 346         struct dev_context *devc;
 347         const struct scope_config *model;
 348         struct scope_state *state;
 349         const char *tmp;
 350         uint64_t p, q;
 351         double tmp_d;
 352         gboolean update_sample_rate;
 353
 354         if (!sdi || !(devc = sdi->priv))
 355                 return SR_ERR_ARG;
 356
 357         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 358                 return SR_ERR;
 359
 360         model = devc->model_config;
 361         state = devc->model_state;
 362         update_sample_rate = FALSE;
 363
 364         ret = SR_ERR_NA;
 365
 366         switch (key) {
 367         case SR_CONF_LIMIT_FRAMES:
 368                 devc->frame_limit = g_variant_get_uint64(data);
 369                 ret = SR_OK;
 370                 break;
 371         case SR_CONF_TRIGGER_SOURCE:
 372                 tmp = g_variant_get_string(data, NULL);
 373                 for (i = 0; (*model->trigger_sources)[i]; i++) {
 374                         if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
 375                                 continue;
 376                         state->trigger_source = i;
 377                         /* TODO: A and B trigger support possible? */
 378                         ret = dlm_trigger_source_set(sdi->conn, (*model->trigger_sources)[i]);
 379                         break;
 380                 }
 381                 break;
 382         case SR_CONF_VDIV:
 383                 if (cg_type == CG_NONE) {
 384                         sr_err("No channel group specified.");
 385                         return SR_ERR_CHANNEL_GROUP;
 386                 }
 387
 388                 g_variant_get(data, "(tt)", &p, &q);
 389
 390                 for (i = 0; i < ARRAY_SIZE(dlm_vdivs); i++) {
 391                         if (p != dlm_vdivs[i][0] ||
 392                                         q != dlm_vdivs[i][1])
 393                                 continue;
 394                         for (j = 1; j <= model->analog_channels; j++) {
 395                                 if (cg != devc->analog_groups[j - 1])
 396                                         continue;
 397                                 state->analog_states[j - 1].vdiv = i;
 398                                 g_ascii_formatd(float_str, sizeof(float_str),
 399                                                 "%E", (float) p / q);
 400                                 if (dlm_analog_chan_vdiv_set(sdi->conn, j, float_str) != SR_OK ||
 401                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 402                                         return SR_ERR;
 403
 404                                 break;
 405                         }
 406
 407                         ret = SR_OK;
 408                         break;
 409                 }
 410                 break;
 411         case SR_CONF_TIMEBASE:
 412                 g_variant_get(data, "(tt)", &p, &q);
 413
 414                 for (i = 0; i < ARRAY_SIZE(dlm_timebases); i++) {
 415                         if (p != dlm_timebases[i][0] ||
 416                                         q != dlm_timebases[i][1])
 417                                 continue;
 418                         state->timebase = i;
 419                         g_ascii_formatd(float_str, sizeof(float_str),
 420                                         "%E", (float) p / q);
 421                         ret = dlm_timebase_set(sdi->conn, float_str);
 422                         update_sample_rate = TRUE;
 423                         break;
 424                 }
 425                 break;
 426         case SR_CONF_HORIZ_TRIGGERPOS:
 427                 tmp_d = g_variant_get_double(data);
 428
 429                 /* TODO: Check if the calculation makes sense for the DLM. */
 430                 if (tmp_d < 0.0 || tmp_d > 1.0)
 431                         return SR_ERR;
 432
 433                 state->horiz_triggerpos = tmp_d;
 434                 tmp_d = -(tmp_d - 0.5) *
 435                                 ((double) dlm_timebases[state->timebase][0] /
 436                                 dlm_timebases[state->timebase][1])
 437                                 * model->num_xdivs;
 438
 439                 g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
 440                 ret = dlm_horiz_trigger_pos_set(sdi->conn, float_str);
 441                 break;
 442         case SR_CONF_TRIGGER_SLOPE:
 443                 tmp = g_variant_get_string(data, NULL);
 444
 445                 if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
 446                         return SR_ERR_ARG;
 447
 448                 /* Note: See dlm_trigger_slopes[] in protocol.c. */
 449                 state->trigger_slope = (tmp[0] == 'r') ?
 450                                 SLOPE_POSITIVE : SLOPE_NEGATIVE;
 451
 452                 ret = dlm_trigger_slope_set(sdi->conn, state->trigger_slope);
 453                 break;
 454         case SR_CONF_COUPLING:
 455                 if (cg_type == CG_NONE) {
 456                         sr_err("No channel group specified.");
 457                         return SR_ERR_CHANNEL_GROUP;
 458                 }
 459
 460                 tmp = g_variant_get_string(data, NULL);
 461
 462                 for (i = 0; (*model->coupling_options)[i]; i++) {
 463                         if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
 464                                 continue;
 465                         for (j = 1; j <= model->analog_channels; j++) {
 466                                 if (cg != devc->analog_groups[j - 1])
 467                                         continue;
 468                                 state->analog_states[j-1].coupling = i;
 469
 470                                 if (dlm_analog_chan_coupl_set(sdi->conn, j, tmp) != SR_OK ||
 471                                                 sr_scpi_get_opc(sdi->conn) != SR_OK)
 472                                         return SR_ERR;
 473                                 break;
 474                         }
 475
 476                         ret = SR_OK;
 477                         break;
 478                 }
 479                 break;
 480         default:
 481                 ret = SR_ERR_NA;
 482                 break;
 483         }
 484
 485         if (ret == SR_OK)
 486                 ret = sr_scpi_get_opc(sdi->conn);
 487
 488         if (ret == SR_OK && update_sample_rate)
 489                 ret = dlm_sample_rate_query(sdi);
 490
 491         return ret;
 492 }
 493
 494 static int config_channel_set(const struct sr_dev_inst *sdi,
 495                         struct sr_channel *ch, unsigned int changes)
 496 {
 497         /* Currently we only handle SR_CHANNEL_SET_ENABLED. */
 498         if (changes != SR_CHANNEL_SET_ENABLED)
 499                 return SR_ERR_NA;
 500
 501         return dlm_channel_state_set(sdi, ch->index, ch->enabled);
 502 }
 503
 504 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 505                 const struct sr_channel_group *cg)
 506 {
 507         int cg_type = CG_NONE;
 508         struct dev_context *devc = NULL;
 509         const struct scope_config *model = NULL;
 510
 511         /* SR_CONF_SCAN_OPTIONS is always valid, regardless of sdi or probe group. */
 512         if (key == SR_CONF_SCAN_OPTIONS) {
 513                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 514                                 dlm_scanopts, ARRAY_SIZE(dlm_scanopts), sizeof(uint32_t));
 515                 return SR_OK;
 516         }
 517
 518         /* If sdi is NULL, nothing except SR_CONF_DEVICE_OPTIONS can be provided. */
 519         if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 520                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 521                                 dlm_drvopts, ARRAY_SIZE(dlm_drvopts), sizeof(uint32_t));
 522                 return SR_OK;
 523         }
 524
 525         if (!sdi)
 526                 return SR_ERR_ARG;
 527
 528         devc = sdi->priv;
 529         model = devc->model_config;
 530
 531         /*
 532          * If cg is NULL, only the SR_CONF_DEVICE_OPTIONS that are not
 533          * specific to a probe group must be returned.
 534          */
 535         if (!cg) {
 536                 switch (key) {
 537                 case SR_CONF_DEVICE_OPTIONS:
 538                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 539                                         dlm_devopts, ARRAY_SIZE(dlm_devopts), sizeof(uint32_t));
 540                         return SR_OK;
 541                 case SR_CONF_TIMEBASE:
 542                         *data = build_tuples(&dlm_timebases, ARRAY_SIZE(dlm_timebases));
 543                         return SR_OK;
 544                 case SR_CONF_TRIGGER_SOURCE:
 545                         if (!model)
 546                                 return SR_ERR_ARG;
 547                         *data = g_variant_new_strv(*model->trigger_sources,
 548                                         g_strv_length((char **)*model->trigger_sources));
 549                         return SR_OK;
 550                 case SR_CONF_TRIGGER_SLOPE:
 551                         *data = g_variant_new_strv(dlm_trigger_slopes,
 552                                         g_strv_length((char **)dlm_trigger_slopes));
 553                         return SR_OK;
 554                 case SR_CONF_NUM_HDIV:
 555                         *data = g_variant_new_uint32(model->num_xdivs);
 556                         return SR_OK;
 557                 default:
 558                         return SR_ERR_NA;
 559                 }
 560         }
 561
 562         if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
 563                 return SR_ERR;
 564
 565         switch (key) {
 566         case SR_CONF_DEVICE_OPTIONS:
 567                 if (cg_type == CG_ANALOG) {
 568                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 569                                 dlm_analog_devopts, ARRAY_SIZE(dlm_analog_devopts), sizeof(uint32_t));
 570                 } else if (cg_type == CG_DIGITAL) {
 571                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 572                                 dlm_digital_devopts, ARRAY_SIZE(dlm_digital_devopts), sizeof(uint32_t));
 573                 } else {
 574                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 575                                 NULL, 0, sizeof(uint32_t));
 576                 }
 577                 break;
 578         case SR_CONF_COUPLING:
 579                 if (cg_type == CG_NONE)
 580                         return SR_ERR_CHANNEL_GROUP;
 581                 *data = g_variant_new_strv(*model->coupling_options,
 582                                 g_strv_length((char **)*model->coupling_options));
 583                 break;
 584         case SR_CONF_VDIV:
 585                 if (cg_type == CG_NONE)
 586                         return SR_ERR_CHANNEL_GROUP;
 587                 *data = build_tuples(&dlm_vdivs, ARRAY_SIZE(dlm_vdivs));
 588                 break;
 589         default:
 590                 return SR_ERR_NA;
 591         }
 592
 593         return SR_OK;
 594 }
 595
 596 static int dlm_check_channels(GSList *channels)
 597 {
 598         GSList *l;
 599         struct sr_channel *ch;
 600         gboolean enabled_pod1, enabled_chan4;
 601
 602         enabled_pod1 = enabled_chan4 = FALSE;
 603
 604         /* Note: On the DLM2000, CH4 and Logic are shared. */
 605         /* TODO Handle non-DLM2000 models. */
 606         for (l = channels; l; l = l->next) {
 607                 ch = l->data;
 608                 switch (ch->type) {
 609                 case SR_CHANNEL_ANALOG:
 610                         if (ch->index == 3)
 611                                 enabled_chan4 = TRUE;
 612                         break;
 613                 case SR_CHANNEL_LOGIC:
 614                         enabled_pod1 = TRUE;
 615                         break;
 616                 default:
 617                         return SR_ERR;
 618                 }
 619         }
 620
 621         if (enabled_pod1 && enabled_chan4)
 622                 return SR_ERR;
 623
 624         return SR_OK;
 625 }
 626
 627 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 628 {
 629         GSList *l;
 630         gboolean digital_added;
 631         struct sr_channel *ch;
 632         struct dev_context *devc;
 633         struct sr_scpi_dev_inst *scpi;
 634
 635         (void)cb_data;
 636
 637         if (sdi->status != SR_ST_ACTIVE)
 638                 return SR_ERR_DEV_CLOSED;
 639
 640         scpi = sdi->conn;
 641         devc = sdi->priv;
 642         digital_added = FALSE;
 643
 644         g_slist_free(devc->enabled_channels);
 645         devc->enabled_channels = NULL;
 646
 647         for (l = sdi->channels; l; l = l->next) {
 648                 ch = l->data;
 649                 if (!ch->enabled)
 650                         continue;
 651                 /* Only add a single digital channel. */
 652                 if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
 653                         devc->enabled_channels = g_slist_append(
 654                                 devc->enabled_channels, ch);
 655                         if (ch->type == SR_CHANNEL_LOGIC)
 656                                 digital_added = TRUE;
 657                 }
 658         }
 659
 660         if (!devc->enabled_channels)
 661                 return SR_ERR;
 662
 663         if (dlm_check_channels(devc->enabled_channels) != SR_OK) {
 664                 sr_err("Invalid channel configuration specified!");
 665                 return SR_ERR_NA;
 666         }
 667
 668         /* Request data for the first enabled channel. */
 669         devc->current_channel = devc->enabled_channels;
 670         dlm_channel_data_request(sdi);
 671
 672         /* Call our callback when data comes in or after 5ms. */
 673         sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 5,
 674                         dlm_data_receive, (void *)sdi);
 675
 676         return SR_OK;
 677 }
 678
 679 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 680 {
 681         struct dev_context *devc;
 682         struct sr_datafeed_packet packet;
 683
 684         (void)cb_data;
 685
 686         packet.type = SR_DF_END;
 687         packet.payload = NULL;
 688         sr_session_send(sdi, &packet);
 689
 690         if (sdi->status != SR_ST_ACTIVE)
 691                 return SR_ERR_DEV_CLOSED;
 692
 693         devc = sdi->priv;
 694
 695         devc->num_frames = 0;
 696         g_slist_free(devc->enabled_channels);
 697         devc->enabled_channels = NULL;
 698
 699         sr_scpi_source_remove(sdi->session, sdi->conn);
 700
 701         return SR_OK;
 702 }
 703
 704 SR_PRIV struct sr_dev_driver yokogawa_dlm_driver_info = {
 705         .name = "yokogawa-dlm",
 706         .longname = "Yokogawa DL/DLM",
 707         .api_version = 1,
 708         .init = init,
 709         .cleanup = cleanup,
 710         .scan = scan,
 711         .dev_list = dev_list,
 712         .dev_clear = dev_clear,
 713         .config_get = config_get,
 714         .config_set = config_set,
 715         .config_channel_set = config_channel_set,
 716         .config_list = config_list,
 717         .dev_open = dev_open,
 718         .dev_close = dev_close,
 719         .dev_acquisition_start = dev_acquisition_start,
 720         .dev_acquisition_stop = dev_acquisition_stop,
 721         .context = NULL,
 722 };