src/hardware/dslogic/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   5  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   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 <math.h>
  23 #include "protocol.h"
  24
  25 static const struct dslogic_profile supported_device[] = {
  26         /* DreamSourceLab DSLogic */
  27         { 0x2a0e, 0x0001, "DreamSourceLab", "DSLogic", NULL,
  28                 "dreamsourcelab-dslogic-fx2.fw",
  29                 0, "DreamSourceLab", "DSLogic", 256 * 1048576ULL},
  30         /* DreamSourceLab DSCope */
  31         { 0x2a0e, 0x0002, "DreamSourceLab", "DSCope", NULL,
  32                 "dreamsourcelab-dscope-fx2.fw",
  33                 0, "DreamSourceLab", "DSCope", 256 * 1048576ULL},
  34         /* DreamSourceLab DSLogic Pro */
  35         { 0x2a0e, 0x0003, "DreamSourceLab", "DSLogic Pro", NULL,
  36                 "dreamsourcelab-dslogic-pro-fx2.fw",
  37                 0, "DreamSourceLab", "DSLogic", 256 * 1048576ULL},
  38         /* DreamSourceLab DSLogic Plus */
  39         { 0x2a0e, 0x0020, "DreamSourceLab", "DSLogic Plus", NULL,
  40                 "dreamsourcelab-dslogic-plus-fx2.fw",
  41                 0, "DreamSourceLab", "DSLogic", 256 * 1048576ULL},
  42         /* DreamSourceLab DSLogic Basic */
  43         { 0x2a0e, 0x0021, "DreamSourceLab", "DSLogic Basic", NULL,
  44                 "dreamsourcelab-dslogic-basic-fx2.fw",
  45                 0, "DreamSourceLab", "DSLogic", 256 * 1024ULL},
  46
  47         ALL_ZERO
  48 };
  49
  50 static const uint32_t drvopts[] = {
  51         SR_CONF_LOGIC_ANALYZER,
  52 };
  53
  54 static const uint32_t scanopts[] = {
  55         SR_CONF_CONN,
  56 };
  57
  58 static const uint32_t devopts[] = {
  59         SR_CONF_CONTINUOUS | SR_CONF_SET | SR_CONF_GET,
  60         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  61         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  62         SR_CONF_CONN | SR_CONF_GET,
  63         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  64         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  65         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  66         SR_CONF_EXTERNAL_CLOCK | SR_CONF_GET | SR_CONF_SET,
  67         SR_CONF_CLOCK_EDGE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  68 };
  69
  70 /* Names assigned to available edge slope choices. */
  71 static const char *const signal_edge_names[] = {
  72         [DS_EDGE_RISING] = "rising",
  73         [DS_EDGE_FALLING] = "falling",
  74 };
  75
  76 static const struct {
  77         gdouble low;
  78         gdouble high;
  79 } dslogic_voltage_thresholds[] = {
  80         { 0.7, 1.4 },
  81         { 1.4, 3.6 },
  82 };
  83
  84 static const uint64_t samplerates[] = {
  85         SR_KHZ(10),
  86         SR_KHZ(20),
  87         SR_KHZ(50),
  88         SR_KHZ(100),
  89         SR_KHZ(200),
  90         SR_KHZ(500),
  91         SR_MHZ(1),
  92         SR_MHZ(2),
  93         SR_MHZ(5),
  94         SR_MHZ(10),
  95         SR_MHZ(20),
  96         SR_MHZ(25),
  97         SR_MHZ(50),
  98         SR_MHZ(100),
  99         SR_MHZ(200),
 100         SR_MHZ(400),
 101 };
 102
 103 static gboolean is_plausible(const struct libusb_device_descriptor *des)
 104 {
 105         int i;
 106
 107         for (i = 0; supported_device[i].vid; i++) {
 108                 if (des->idVendor != supported_device[i].vid)
 109                         continue;
 110                 if (des->idProduct == supported_device[i].pid)
 111                         return TRUE;
 112         }
 113
 114         return FALSE;
 115 }
 116
 117 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 118 {
 119         struct drv_context *drvc;
 120         struct dev_context *devc;
 121         struct sr_dev_inst *sdi;
 122         struct sr_usb_dev_inst *usb;
 123         struct sr_channel *ch;
 124         struct sr_channel_group *cg;
 125         struct sr_config *src;
 126         const struct dslogic_profile *prof;
 127         GSList *l, *devices, *conn_devices;
 128         gboolean has_firmware;
 129         struct libusb_device_descriptor des;
 130         libusb_device **devlist;
 131         struct libusb_device_handle *hdl;
 132         int ret, i, j;
 133         const char *conn;
 134         char manufacturer[64], product[64], serial_num[64], connection_id[64];
 135         char channel_name[16];
 136
 137         drvc = di->context;
 138
 139         conn = NULL;
 140         for (l = options; l; l = l->next) {
 141                 src = l->data;
 142                 switch (src->key) {
 143                 case SR_CONF_CONN:
 144                         conn = g_variant_get_string(src->data, NULL);
 145                         break;
 146                 }
 147         }
 148         if (conn)
 149                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 150         else
 151                 conn_devices = NULL;
 152
 153         /* Find all dslogic compatible devices and upload firmware to them. */
 154         devices = NULL;
 155         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 156         for (i = 0; devlist[i]; i++) {
 157                 if (conn) {
 158                         usb = NULL;
 159                         for (l = conn_devices; l; l = l->next) {
 160                                 usb = l->data;
 161                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 162                                         && usb->address == libusb_get_device_address(devlist[i]))
 163                                         break;
 164                         }
 165                         if (!l)
 166                                 /* This device matched none of the ones that
 167                                  * matched the conn specification. */
 168                                 continue;
 169                 }
 170
 171                 libusb_get_device_descriptor( devlist[i], &des);
 172
 173                 if (!is_plausible(&des))
 174                         continue;
 175
 176                 if ((ret = libusb_open(devlist[i], &hdl)) < 0) {
 177                         sr_warn("Failed to open potential device with "
 178                                 "VID:PID %04x:%04x: %s.", des.idVendor,
 179                                 des.idProduct, libusb_error_name(ret));
 180                         continue;
 181                 }
 182
 183                 if (des.iManufacturer == 0) {
 184                         manufacturer[0] = '\0';
 185                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 186                                 des.iManufacturer, (unsigned char *) manufacturer,
 187                                 sizeof(manufacturer))) < 0) {
 188                         sr_warn("Failed to get manufacturer string descriptor: %s.",
 189                                 libusb_error_name(ret));
 190                         continue;
 191                 }
 192
 193                 if (des.iProduct == 0) {
 194                         product[0] = '\0';
 195                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 196                                 des.iProduct, (unsigned char *) product,
 197                                 sizeof(product))) < 0) {
 198                         sr_warn("Failed to get product string descriptor: %s.",
 199                                 libusb_error_name(ret));
 200                         continue;
 201                 }
 202
 203                 if (des.iSerialNumber == 0) {
 204                         serial_num[0] = '\0';
 205                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 206                                 des.iSerialNumber, (unsigned char *) serial_num,
 207                                 sizeof(serial_num))) < 0) {
 208                         sr_warn("Failed to get serial number string descriptor: %s.",
 209                                 libusb_error_name(ret));
 210                         continue;
 211                 }
 212
 213                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 214
 215                 libusb_close(hdl);
 216
 217                 prof = NULL;
 218                 for (j = 0; supported_device[j].vid; j++) {
 219                         if (des.idVendor == supported_device[j].vid &&
 220                                         des.idProduct == supported_device[j].pid &&
 221                                         (!strcmp(manufacturer, supported_device[j].usb_manufacturer)) &&
 222                                         (!strcmp(product, "USB-based Instrument") ||
 223                                                 !strcmp(product, supported_device[j].usb_product))) {
 224                                 prof = &supported_device[j];
 225                                 break;
 226                         }
 227                 }
 228
 229                 /* Skip if the device was not found. */
 230                 if (!prof)
 231                         continue;
 232
 233                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 234                 sdi->status = SR_ST_INITIALIZING;
 235                 sdi->vendor = g_strdup(prof->vendor);
 236                 sdi->model = g_strdup(prof->model);
 237                 sdi->version = g_strdup(prof->model_version);
 238                 sdi->serial_num = g_strdup(serial_num);
 239                 sdi->connection_id = g_strdup(connection_id);
 240
 241                 /* Logic channels, all in one channel group. */
 242                 cg = g_malloc0(sizeof(struct sr_channel_group));
 243                 cg->name = g_strdup("Logic");
 244                 for (j = 0; j < 16; j++) {
 245                         sprintf(channel_name, "%d", j);
 246                         ch = sr_channel_new(sdi, j, SR_CHANNEL_LOGIC,
 247                                                 TRUE, channel_name);
 248                         cg->channels = g_slist_append(cg->channels, ch);
 249                 }
 250                 sdi->channel_groups = g_slist_append(NULL, cg);
 251
 252                 devc = dslogic_dev_new();
 253                 devc->profile = prof;
 254                 sdi->priv = devc;
 255                 devices = g_slist_append(devices, sdi);
 256
 257                 devc->samplerates = samplerates;
 258                 devc->num_samplerates = ARRAY_SIZE(samplerates);
 259                 has_firmware = usb_match_manuf_prod(devlist[i], "DreamSourceLab", "USB-based Instrument");
 260
 261                 if (has_firmware) {
 262                         /* Already has the firmware, so fix the new address. */
 263                         sr_dbg("Found an dslogic device.");
 264                         sdi->status = SR_ST_INACTIVE;
 265                         sdi->inst_type = SR_INST_USB;
 266                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 267                                         libusb_get_device_address(devlist[i]), NULL);
 268                 } else {
 269                         if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 270                                         USB_CONFIGURATION, prof->firmware) == SR_OK)
 271                                 /* Store when this device's FW was updated. */
 272                                 devc->fw_updated = g_get_monotonic_time();
 273                         else
 274                                 sr_err("Firmware upload failed for "
 275                                        "device %d.%d (logical).",
 276                                        libusb_get_bus_number(devlist[i]),
 277                                        libusb_get_device_address(devlist[i]));
 278                         sdi->inst_type = SR_INST_USB;
 279                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 280                                         0xff, NULL);
 281                 }
 282         }
 283         libusb_free_device_list(devlist, 1);
 284         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 285
 286         return std_scan_complete(di, devices);
 287 }
 288
 289 static void clear_dev_context(void *priv)
 290 {
 291         struct dev_context *devc;
 292
 293         devc = priv;
 294         g_free(devc);
 295 }
 296
 297 static int dev_clear(const struct sr_dev_driver *di)
 298 {
 299         return std_dev_clear(di, clear_dev_context);
 300 }
 301
 302 static int dev_open(struct sr_dev_inst *sdi)
 303 {
 304         struct sr_dev_driver *di = sdi->driver;
 305         struct sr_usb_dev_inst *usb;
 306         struct dev_context *devc;
 307         int ret;
 308         int64_t timediff_us, timediff_ms;
 309
 310         devc = sdi->priv;
 311         usb = sdi->conn;
 312
 313         /*
 314          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 315          * milliseconds for the FX2 to renumerate.
 316          */
 317         ret = SR_ERR;
 318         if (devc->fw_updated > 0) {
 319                 sr_info("Waiting for device to reset.");
 320                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 321                 g_usleep(300 * 1000);
 322                 timediff_ms = 0;
 323                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 324                         if ((ret = dslogic_dev_open(sdi, di)) == SR_OK)
 325                                 break;
 326                         g_usleep(100 * 1000);
 327
 328                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 329                         timediff_ms = timediff_us / 1000;
 330                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 331                 }
 332                 if (ret != SR_OK) {
 333                         sr_err("Device failed to renumerate.");
 334                         return SR_ERR;
 335                 }
 336                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 337         } else {
 338                 sr_info("Firmware upload was not needed.");
 339                 ret = dslogic_dev_open(sdi, di);
 340         }
 341
 342         if (ret != SR_OK) {
 343                 sr_err("Unable to open device.");
 344                 return SR_ERR;
 345         }
 346
 347         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 348         if (ret != 0) {
 349                 switch (ret) {
 350                 case LIBUSB_ERROR_BUSY:
 351                         sr_err("Unable to claim USB interface. Another "
 352                                "program or driver has already claimed it.");
 353                         break;
 354                 case LIBUSB_ERROR_NO_DEVICE:
 355                         sr_err("Device has been disconnected.");
 356                         break;
 357                 default:
 358                         sr_err("Unable to claim interface: %s.",
 359                                libusb_error_name(ret));
 360                         break;
 361                 }
 362
 363                 return SR_ERR;
 364         }
 365
 366
 367         if ((ret = dslogic_fpga_firmware_upload(sdi)) != SR_OK)
 368                 return ret;
 369
 370         if (devc->cur_samplerate == 0) {
 371                 /* Samplerate hasn't been set; default to the slowest one. */
 372                 devc->cur_samplerate = devc->samplerates[0];
 373         }
 374
 375         if (devc->cur_threshold == 0.0)
 376                 devc->cur_threshold = 1.5;
 377
 378         return SR_OK;
 379 }
 380
 381 static int dev_close(struct sr_dev_inst *sdi)
 382 {
 383         struct sr_usb_dev_inst *usb;
 384
 385         usb = sdi->conn;
 386
 387         if (!usb->devhdl)
 388                 return SR_ERR;
 389
 390         sr_info("dslogic: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 391                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 392         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 393         libusb_close(usb->devhdl);
 394         usb->devhdl = NULL;
 395         sdi->status = SR_ST_INACTIVE;
 396
 397         return SR_OK;
 398 }
 399
 400 static int config_get(uint32_t key, GVariant **data,
 401         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 402 {
 403         struct dev_context *devc;
 404         struct sr_usb_dev_inst *usb;
 405         GVariant *range[2];
 406         unsigned int i, voltage_range;
 407         char str[128];
 408
 409         (void)cg;
 410
 411         if (!sdi)
 412                 return SR_ERR_ARG;
 413
 414         devc = sdi->priv;
 415
 416         switch (key) {
 417         case SR_CONF_CONN:
 418                 if (!sdi->conn)
 419                         return SR_ERR_ARG;
 420                 usb = sdi->conn;
 421                 if (usb->address == 255)
 422                         /* Device still needs to re-enumerate after firmware
 423                          * upload, so we don't know its (future) address. */
 424                         return SR_ERR;
 425                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 426                 *data = g_variant_new_string(str);
 427                 break;
 428         case SR_CONF_VOLTAGE_THRESHOLD:
 429                 if (!strcmp(devc->profile->model, "DSLogic")) {
 430                         voltage_range = 0;
 431
 432                         for (i = 0; i < ARRAY_SIZE(dslogic_voltage_thresholds); i++)
 433                                 if (dslogic_voltage_thresholds[i].low ==
 434                                         devc->cur_threshold) {
 435                                         voltage_range = i;
 436                                         break;
 437                                 }
 438
 439                         range[0] = g_variant_new_double(
 440                                 dslogic_voltage_thresholds[voltage_range].low);
 441                         range[1] = g_variant_new_double(
 442                                 dslogic_voltage_thresholds[voltage_range].high);
 443                 } else {
 444                         range[0] = g_variant_new_double(devc->cur_threshold);
 445                         range[1] = g_variant_new_double(devc->cur_threshold);
 446                 }
 447                 *data = g_variant_new_tuple(range, 2);
 448                 break;
 449         case SR_CONF_LIMIT_SAMPLES:
 450                 *data = g_variant_new_uint64(devc->limit_samples);
 451                 break;
 452         case SR_CONF_SAMPLERATE:
 453                 *data = g_variant_new_uint64(devc->cur_samplerate);
 454                 break;
 455         case SR_CONF_CAPTURE_RATIO:
 456                 *data = g_variant_new_uint64(devc->capture_ratio);
 457                 break;
 458         case SR_CONF_EXTERNAL_CLOCK:
 459                 *data = g_variant_new_boolean(devc->external_clock);
 460                 break;
 461         case SR_CONF_CONTINUOUS:
 462                 *data = g_variant_new_boolean(devc->continuous_mode);
 463                 break;
 464         case SR_CONF_CLOCK_EDGE:
 465                 i = devc->clock_edge;
 466                 if (i >= ARRAY_SIZE(signal_edge_names))
 467                         return SR_ERR_BUG;
 468                 *data = g_variant_new_string(signal_edge_names[0]);
 469                 break;
 470         default:
 471                 return SR_ERR_NA;
 472         }
 473
 474         return SR_OK;
 475 }
 476
 477 /*
 478  * Helper for mapping a string-typed configuration value to an index
 479  * within a table of possible values.
 480  */
 481 static int lookup_index(GVariant *value, const char *const *table, int len)
 482 {
 483         const char *entry;
 484         int i;
 485
 486         entry = g_variant_get_string(value, NULL);
 487         if (!entry)
 488                 return -1;
 489
 490         /* Linear search is fine for very small tables. */
 491         for (i = 0; i < len; i++) {
 492                 if (strcmp(entry, table[i]) == 0)
 493                         return i;
 494         }
 495
 496         return -1;
 497 }
 498
 499 static int config_set(uint32_t key, GVariant *data,
 500         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 501 {
 502         struct dev_context *devc;
 503         uint64_t arg;
 504         int i, ret;
 505         gdouble low, high;
 506
 507         (void)cg;
 508
 509         if (!sdi)
 510                 return SR_ERR_ARG;
 511
 512         if (sdi->status != SR_ST_ACTIVE)
 513                 return SR_ERR;
 514
 515         devc = sdi->priv;
 516
 517         ret = SR_OK;
 518
 519         switch (key) {
 520         case SR_CONF_SAMPLERATE:
 521                 arg = g_variant_get_uint64(data);
 522                 for (i = 0; i < devc->num_samplerates; i++) {
 523                         if (devc->samplerates[i] == arg) {
 524                                 devc->cur_samplerate = arg;
 525                                 break;
 526                         }
 527                 }
 528                 if (i == devc->num_samplerates)
 529                         ret = SR_ERR_ARG;
 530                 break;
 531         case SR_CONF_LIMIT_SAMPLES:
 532                 devc->limit_samples = g_variant_get_uint64(data);
 533                 break;
 534         case SR_CONF_CAPTURE_RATIO:
 535                 devc->capture_ratio = g_variant_get_uint64(data);
 536                 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
 537                 break;
 538         case SR_CONF_VOLTAGE_THRESHOLD:
 539                 g_variant_get(data, "(dd)", &low, &high);
 540                 if (!strcmp(devc->profile->model, "DSLogic")) {
 541                         for (i = 0; (unsigned int)i <
 542                                 ARRAY_SIZE(dslogic_voltage_thresholds); i++) {
 543                                 if (fabs(dslogic_voltage_thresholds[i].low - low) < 0.1 &&
 544                                     fabs(dslogic_voltage_thresholds[i].high - high) < 0.1) {
 545                                         devc->cur_threshold =
 546                                                 dslogic_voltage_thresholds[i].low;
 547                                         break;
 548                                 }
 549                         }
 550                         ret = dslogic_fpga_firmware_upload(sdi);
 551                 } else {
 552                         ret = dslogic_set_voltage_threshold(sdi, (low + high) / 2.0);
 553                 }
 554                 break;
 555         case SR_CONF_EXTERNAL_CLOCK:
 556                 devc->external_clock = g_variant_get_boolean(data);
 557                 break;
 558         case SR_CONF_CONTINUOUS:
 559                 devc->continuous_mode = g_variant_get_boolean(data);
 560                 break;
 561         case SR_CONF_CLOCK_EDGE:
 562                 i = lookup_index(data, signal_edge_names,
 563                                    ARRAY_SIZE(signal_edge_names));
 564                 if (i < 0)
 565                         return SR_ERR_ARG;
 566                 devc->clock_edge = i;
 567                 break;
 568         default:
 569                 ret = SR_ERR_NA;
 570         }
 571
 572         return ret;
 573 }
 574
 575 static int config_list(uint32_t key, GVariant **data,
 576         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 577 {
 578         struct dev_context *devc = NULL;
 579         GVariant *gvar, *range[2];
 580         GVariantBuilder gvb;
 581         unsigned int i;
 582         double v;
 583
 584         (void)cg;
 585
 586         switch (key) {
 587         case SR_CONF_SCAN_OPTIONS:
 588                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 589                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 590                 break;
 591         case SR_CONF_DEVICE_OPTIONS:
 592                 if (!sdi) {
 593                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 594                                 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 595                 } else {
 596                         devc = sdi->priv;
 597                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 598                                                           devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 599                 }
 600                 break;
 601         case SR_CONF_VOLTAGE_THRESHOLD:
 602                 if (sdi->priv)
 603                         devc = sdi->priv;
 604                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 605                 if (devc && !strcmp(devc->profile->model, "DSLogic")) {
 606                         for (i = 0; i < ARRAY_SIZE(dslogic_voltage_thresholds); i++) {
 607                                 range[0] = g_variant_new_double(dslogic_voltage_thresholds[i].low);
 608                                 range[1] = g_variant_new_double(dslogic_voltage_thresholds[i].high);
 609                                 gvar = g_variant_new_tuple(range, 2);
 610                                 g_variant_builder_add_value(&gvb, gvar);
 611                         }
 612                 } else {
 613                         for (v = 0.0; v <= 5.0; v += 0.1) {
 614                                 range[0] = g_variant_new_double(v);
 615                                 range[1] = g_variant_new_double(v);
 616                                 gvar = g_variant_new_tuple(range, 2);
 617                                 g_variant_builder_add_value(&gvb, gvar);
 618                         }
 619                 }
 620                 *data = g_variant_builder_end(&gvb);
 621                 break;
 622         case SR_CONF_SAMPLERATE:
 623                 devc = sdi->priv;
 624                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 625                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), devc->samplerates,
 626                                 devc->num_samplerates, sizeof(uint64_t));
 627                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 628                 *data = g_variant_builder_end(&gvb);
 629                 break;
 630         case SR_CONF_CLOCK_EDGE:
 631                 *data = g_variant_new_strv(signal_edge_names,
 632                         ARRAY_SIZE(signal_edge_names));
 633                 break;
 634         default:
 635                 return SR_ERR_NA;
 636         }
 637
 638         return SR_OK;
 639 }
 640
 641 static struct sr_dev_driver dslogic_driver_info = {
 642         .name = "dslogic",
 643         .longname = "DreamSourceLabs DSLogic",
 644         .api_version = 1,
 645         .init = std_init,
 646         .cleanup = std_cleanup,
 647         .scan = scan,
 648         .dev_list = std_dev_list,
 649         .dev_clear = dev_clear,
 650         .config_get = config_get,
 651         .config_set = config_set,
 652         .config_list = config_list,
 653         .dev_open = dev_open,
 654         .dev_close = dev_close,
 655         .dev_acquisition_start = dslogic_acquisition_start,
 656         .dev_acquisition_stop = dslogic_acquisition_stop,
 657         .context = NULL,
 658 };
 659 SR_REGISTER_DEV_DRIVER(dslogic_driver_info);