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 "protocol.h"
  23 #include "dslogic.h"
  24 #include <math.h>
  25
  26 static const struct dslogic_profile supported_device[] = {
  27         /* DreamSourceLab DSLogic (before FW upload) */
  28         { 0x2a0e, 0x0001, "DreamSourceLab", "DSLogic", NULL,
  29                 "dreamsourcelab-dslogic-fx2.fw",
  30                 0, NULL, NULL},
  31         /* DreamSourceLab DSLogic (after FW upload) */
  32         { 0x2a0e, 0x0001, "DreamSourceLab", "DSLogic", NULL,
  33                 "dreamsourcelab-dslogic-fx2.fw",
  34                 0, "DreamSourceLab", "DSLogic"},
  35
  36         /* DreamSourceLab DSCope (before FW upload) */
  37         { 0x2a0e, 0x0002, "DreamSourceLab", "DSCope", NULL,
  38                 "dreamsourcelab-dscope-fx2.fw",
  39                 0, NULL, NULL},
  40         /* DreamSourceLab DSCope (after FW upload) */
  41         { 0x2a0e, 0x0002, "DreamSourceLab", "DSCope", NULL,
  42                 "dreamsourcelab-dscope-fx2.fw",
  43                 0, "DreamSourceLab", "DSCope"},
  44
  45         /* DreamSourceLab DSLogic Pro (before FW upload) */
  46         { 0x2a0e, 0x0003, "DreamSourceLab", "DSLogic Pro", NULL,
  47                 "dreamsourcelab-dslogic-pro-fx2.fw",
  48                 0, NULL, NULL},
  49         /* DreamSourceLab DSLogic Pro (after FW upload) */
  50         { 0x2a0e, 0x0003, "DreamSourceLab", "DSLogic Pro", NULL,
  51                 "dreamsourcelab-dslogic-pro-fx2.fw",
  52                 0, "DreamSourceLab", "DSLogic"},
  53
  54         /* DreamSourceLab DSLogic Plus (before FW upload) */
  55         { 0x2a0e, 0x0020, "DreamSourceLab", "DSLogic Plus", NULL,
  56                 "dreamsourcelab-dslogic-plus-fx2.fw",
  57                 0, NULL, NULL},
  58         /* DreamSourceLab DSLogic Plus (after FW upload) */
  59         { 0x2a0e, 0x0020, "DreamSourceLab", "DSLogic Plus", NULL,
  60                 "dreamsourcelab-dslogic-plus-fx2.fw",
  61                 0, "DreamSourceLab", "DSLogic"},
  62
  63         /* DreamSourceLab DSLogic Basic (before FW upload) */
  64         { 0x2a0e, 0x0021, "DreamSourceLab", "DSLogic Basic", NULL,
  65                 "dreamsourcelab-dslogic-basic-fx2.fw",
  66                 0, NULL, NULL},
  67         /* DreamSourceLab DSLogic Basic (after FW upload) */
  68         { 0x2a0e, 0x0021, "DreamSourceLab", "DSLogic Basic", NULL,
  69                 "dreamsourcelab-dslogic-basic-fx2.fw",
  70                 0, "DreamSourceLab", "DSLogic"},
  71
  72         ALL_ZERO
  73 };
  74
  75 static const uint32_t drvopts[] = {
  76         SR_CONF_LOGIC_ANALYZER,
  77 };
  78
  79 static const uint32_t scanopts[] = {
  80         SR_CONF_CONN,
  81 };
  82
  83 static const uint32_t devopts[] = {
  84         SR_CONF_CONTINUOUS | SR_CONF_SET | SR_CONF_GET,
  85         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  86         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  87         SR_CONF_CONN | SR_CONF_GET,
  88         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  89         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  90         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  91         SR_CONF_EXTERNAL_CLOCK | SR_CONF_GET | SR_CONF_SET,
  92         SR_CONF_CLOCK_EDGE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  93 };
  94
  95 /* Names assigned to available edge slope choices. */
  96 static const char *const signal_edge_names[] = {
  97         [DS_EDGE_RISING] = "rising",
  98         [DS_EDGE_FALLING] = "falling",
  99 };
 100
 101 static const struct {
 102         int range;
 103         gdouble low;
 104         gdouble high;
 105 } volt_thresholds[] = {
 106         { DS_VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
 107         { DS_VOLTAGE_RANGE_5_V, 1.4, 3.6 },
 108 };
 109
 110 static const uint64_t samplerates[] = {
 111         SR_KHZ(10),
 112         SR_KHZ(20),
 113         SR_KHZ(50),
 114         SR_KHZ(100),
 115         SR_KHZ(200),
 116         SR_KHZ(500),
 117         SR_MHZ(1),
 118         SR_MHZ(2),
 119         SR_MHZ(5),
 120         SR_MHZ(10),
 121         SR_MHZ(20),
 122         SR_MHZ(25),
 123         SR_MHZ(50),
 124         SR_MHZ(100),
 125         SR_MHZ(200),
 126         SR_MHZ(400),
 127 };
 128
 129 static gboolean is_plausible(const struct libusb_device_descriptor *des)
 130 {
 131         int i;
 132
 133         for (i = 0; supported_device[i].vid; i++) {
 134                 if (des->idVendor != supported_device[i].vid)
 135                         continue;
 136                 if (des->idProduct == supported_device[i].pid)
 137                         return TRUE;
 138         }
 139
 140         return FALSE;
 141 }
 142
 143 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 144 {
 145         struct drv_context *drvc;
 146         struct dev_context *devc;
 147         struct sr_dev_inst *sdi;
 148         struct sr_usb_dev_inst *usb;
 149         struct sr_channel *ch;
 150         struct sr_channel_group *cg;
 151         struct sr_config *src;
 152         const struct dslogic_profile *prof;
 153         GSList *l, *devices, *conn_devices;
 154         gboolean has_firmware;
 155         struct libusb_device_descriptor des;
 156         libusb_device **devlist;
 157         struct libusb_device_handle *hdl;
 158         int ret, i, j;
 159         const char *conn;
 160         char manufacturer[64], product[64], serial_num[64], connection_id[64];
 161         char channel_name[16];
 162
 163         drvc = di->context;
 164
 165         conn = NULL;
 166         for (l = options; l; l = l->next) {
 167                 src = l->data;
 168                 switch (src->key) {
 169                 case SR_CONF_CONN:
 170                         conn = g_variant_get_string(src->data, NULL);
 171                         break;
 172                 }
 173         }
 174         if (conn)
 175                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 176         else
 177                 conn_devices = NULL;
 178
 179         /* Find all dslogic compatible devices and upload firmware to them. */
 180         devices = NULL;
 181         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 182         for (i = 0; devlist[i]; i++) {
 183                 if (conn) {
 184                         usb = NULL;
 185                         for (l = conn_devices; l; l = l->next) {
 186                                 usb = l->data;
 187                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 188                                         && usb->address == libusb_get_device_address(devlist[i]))
 189                                         break;
 190                         }
 191                         if (!l)
 192                                 /* This device matched none of the ones that
 193                                  * matched the conn specification. */
 194                                 continue;
 195                 }
 196
 197                 libusb_get_device_descriptor( devlist[i], &des);
 198
 199                 if (!is_plausible(&des))
 200                         continue;
 201
 202                 if ((ret = libusb_open(devlist[i], &hdl)) < 0) {
 203                         sr_warn("Failed to open potential device with "
 204                                 "VID:PID %04x:%04x: %s.", des.idVendor,
 205                                 des.idProduct, libusb_error_name(ret));
 206                         continue;
 207                 }
 208
 209                 if (des.iManufacturer == 0) {
 210                         manufacturer[0] = '\0';
 211                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 212                                 des.iManufacturer, (unsigned char *) manufacturer,
 213                                 sizeof(manufacturer))) < 0) {
 214                         sr_warn("Failed to get manufacturer string descriptor: %s.",
 215                                 libusb_error_name(ret));
 216                         continue;
 217                 }
 218
 219                 if (des.iProduct == 0) {
 220                         product[0] = '\0';
 221                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 222                                 des.iProduct, (unsigned char *) product,
 223                                 sizeof(product))) < 0) {
 224                         sr_warn("Failed to get product string descriptor: %s.",
 225                                 libusb_error_name(ret));
 226                         continue;
 227                 }
 228
 229                 if (des.iSerialNumber == 0) {
 230                         serial_num[0] = '\0';
 231                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 232                                 des.iSerialNumber, (unsigned char *) serial_num,
 233                                 sizeof(serial_num))) < 0) {
 234                         sr_warn("Failed to get serial number string descriptor: %s.",
 235                                 libusb_error_name(ret));
 236                         continue;
 237                 }
 238
 239                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 240
 241                 libusb_close(hdl);
 242
 243                 prof = NULL;
 244                 for (j = 0; supported_device[j].vid; j++) {
 245                         if (des.idVendor == supported_device[j].vid &&
 246                                         des.idProduct == supported_device[j].pid &&
 247                                         (!supported_device[j].usb_manufacturer ||
 248                                          !strcmp(manufacturer, supported_device[j].usb_manufacturer)) &&
 249                                         (!supported_device[j].usb_product ||
 250                                          !strcmp(product, supported_device[j].usb_product))) {
 251                                 prof = &supported_device[j];
 252                                 break;
 253                         }
 254                 }
 255
 256                 /* Skip if the device was not found. */
 257                 if (!prof)
 258                         continue;
 259
 260                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 261                 sdi->status = SR_ST_INITIALIZING;
 262                 sdi->vendor = g_strdup(prof->vendor);
 263                 sdi->model = g_strdup(prof->model);
 264                 sdi->version = g_strdup(prof->model_version);
 265                 sdi->serial_num = g_strdup(serial_num);
 266                 sdi->connection_id = g_strdup(connection_id);
 267
 268                 /* Logic channels, all in one channel group. */
 269                 cg = g_malloc0(sizeof(struct sr_channel_group));
 270                 cg->name = g_strdup("Logic");
 271                 for (j = 0; j < 16; j++) {
 272                         sprintf(channel_name, "D%d", j);
 273                         ch = sr_channel_new(sdi, j, SR_CHANNEL_LOGIC,
 274                                                 TRUE, channel_name);
 275                         cg->channels = g_slist_append(cg->channels, ch);
 276                 }
 277                 sdi->channel_groups = g_slist_append(NULL, cg);
 278
 279                 devc = dslogic_dev_new();
 280                 devc->profile = prof;
 281                 sdi->priv = devc;
 282                 devices = g_slist_append(devices, sdi);
 283
 284                 devc->samplerates = samplerates;
 285                 devc->num_samplerates = ARRAY_SIZE(samplerates);
 286                 has_firmware = usb_match_manuf_prod(devlist[i], "DreamSourceLab", "DSLogic")
 287                                 || usb_match_manuf_prod(devlist[i], "DreamSourceLab", "DSCope");
 288
 289                 if (has_firmware) {
 290                         /* Already has the firmware, so fix the new address. */
 291                         sr_dbg("Found an dslogic device.");
 292                         sdi->status = SR_ST_INACTIVE;
 293                         sdi->inst_type = SR_INST_USB;
 294                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 295                                         libusb_get_device_address(devlist[i]), NULL);
 296                 } else {
 297                         if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 298                                         USB_CONFIGURATION, prof->firmware) == SR_OK)
 299                                 /* Store when this device's FW was updated. */
 300                                 devc->fw_updated = g_get_monotonic_time();
 301                         else
 302                                 sr_err("Firmware upload failed for "
 303                                        "device %d.%d (logical).",
 304                                        libusb_get_bus_number(devlist[i]),
 305                                        libusb_get_device_address(devlist[i]));
 306                         sdi->inst_type = SR_INST_USB;
 307                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 308                                         0xff, NULL);
 309                 }
 310         }
 311         libusb_free_device_list(devlist, 1);
 312         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 313
 314         return std_scan_complete(di, devices);
 315 }
 316
 317 static void clear_dev_context(void *priv)
 318 {
 319         struct dev_context *devc;
 320
 321         devc = priv;
 322         g_free(devc);
 323 }
 324
 325 static int dev_clear(const struct sr_dev_driver *di)
 326 {
 327         return std_dev_clear(di, clear_dev_context);
 328 }
 329
 330 static int dev_open(struct sr_dev_inst *sdi)
 331 {
 332         struct sr_dev_driver *di = sdi->driver;
 333         struct sr_usb_dev_inst *usb;
 334         struct dev_context *devc;
 335         int ret;
 336         int64_t timediff_us, timediff_ms;
 337
 338         devc = sdi->priv;
 339         usb = sdi->conn;
 340
 341         /*
 342          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 343          * milliseconds for the FX2 to renumerate.
 344          */
 345         ret = SR_ERR;
 346         if (devc->fw_updated > 0) {
 347                 sr_info("Waiting for device to reset.");
 348                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 349                 g_usleep(300 * 1000);
 350                 timediff_ms = 0;
 351                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 352                         if ((ret = dslogic_dev_open(sdi, di)) == SR_OK)
 353                                 break;
 354                         g_usleep(100 * 1000);
 355
 356                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 357                         timediff_ms = timediff_us / 1000;
 358                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 359                 }
 360                 if (ret != SR_OK) {
 361                         sr_err("Device failed to renumerate.");
 362                         return SR_ERR;
 363                 }
 364                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 365         } else {
 366                 sr_info("Firmware upload was not needed.");
 367                 ret = dslogic_dev_open(sdi, di);
 368         }
 369
 370         if (ret != SR_OK) {
 371                 sr_err("Unable to open device.");
 372                 return SR_ERR;
 373         }
 374
 375         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 376         if (ret != 0) {
 377                 switch (ret) {
 378                 case LIBUSB_ERROR_BUSY:
 379                         sr_err("Unable to claim USB interface. Another "
 380                                "program or driver has already claimed it.");
 381                         break;
 382                 case LIBUSB_ERROR_NO_DEVICE:
 383                         sr_err("Device has been disconnected.");
 384                         break;
 385                 default:
 386                         sr_err("Unable to claim interface: %s.",
 387                                libusb_error_name(ret));
 388                         break;
 389                 }
 390
 391                 return SR_ERR;
 392         }
 393
 394
 395         if ((ret = dslogic_fpga_firmware_upload(sdi)) != SR_OK)
 396                 return ret;
 397
 398         if (devc->cur_samplerate == 0) {
 399                 /* Samplerate hasn't been set; default to the slowest one. */
 400                 devc->cur_samplerate = devc->samplerates[0];
 401         }
 402
 403         return SR_OK;
 404 }
 405
 406 static int dev_close(struct sr_dev_inst *sdi)
 407 {
 408         struct sr_usb_dev_inst *usb;
 409
 410         usb = sdi->conn;
 411
 412         if (!usb->devhdl)
 413                 return SR_ERR;
 414
 415         sr_info("dslogic: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 416                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 417         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 418         libusb_close(usb->devhdl);
 419         usb->devhdl = NULL;
 420         sdi->status = SR_ST_INACTIVE;
 421
 422         return SR_OK;
 423 }
 424
 425 static int config_get(uint32_t key, GVariant **data,
 426         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 427 {
 428         struct dev_context *devc;
 429         struct sr_usb_dev_inst *usb;
 430         GVariant *range[2];
 431         unsigned int i;
 432         char str[128];
 433
 434         (void)cg;
 435
 436         if (!sdi)
 437                 return SR_ERR_ARG;
 438
 439         devc = sdi->priv;
 440
 441         switch (key) {
 442         case SR_CONF_CONN:
 443                 if (!sdi->conn)
 444                         return SR_ERR_ARG;
 445                 usb = sdi->conn;
 446                 if (usb->address == 255)
 447                         /* Device still needs to re-enumerate after firmware
 448                          * upload, so we don't know its (future) address. */
 449                         return SR_ERR;
 450                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 451                 *data = g_variant_new_string(str);
 452                 break;
 453         case SR_CONF_VOLTAGE_THRESHOLD:
 454                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 455                         if (volt_thresholds[i].range != devc->voltage_threshold)
 456                                 continue;
 457                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 458                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 459                         *data = g_variant_new_tuple(range, 2);
 460                         break;
 461                 }
 462                 break;
 463         case SR_CONF_LIMIT_SAMPLES:
 464                 *data = g_variant_new_uint64(devc->limit_samples);
 465                 break;
 466         case SR_CONF_SAMPLERATE:
 467                 *data = g_variant_new_uint64(devc->cur_samplerate);
 468                 break;
 469         case SR_CONF_CAPTURE_RATIO:
 470                 *data = g_variant_new_uint64(devc->capture_ratio);
 471                 break;
 472         case SR_CONF_EXTERNAL_CLOCK:
 473                 *data = g_variant_new_boolean(devc->external_clock);
 474                 break;
 475         case SR_CONF_CONTINUOUS:
 476                 *data = g_variant_new_boolean(devc->continuous_mode);
 477                 break;
 478         case SR_CONF_CLOCK_EDGE:
 479                 i = devc->clock_edge;
 480                 if (i >= ARRAY_SIZE(signal_edge_names))
 481                         return SR_ERR_BUG;
 482                 *data = g_variant_new_string(signal_edge_names[0]);
 483                 break;
 484         default:
 485                 return SR_ERR_NA;
 486         }
 487
 488         return SR_OK;
 489 }
 490
 491 /*
 492  * Helper for mapping a string-typed configuration value to an index
 493  * within a table of possible values.
 494  */
 495 static int lookup_index(GVariant *value, const char *const *table, int len)
 496 {
 497         const char *entry;
 498         int i;
 499
 500         entry = g_variant_get_string(value, NULL);
 501         if (!entry)
 502                 return -1;
 503
 504         /* Linear search is fine for very small tables. */
 505         for (i = 0; i < len; i++) {
 506                 if (strcmp(entry, table[i]) == 0)
 507                         return i;
 508         }
 509
 510         return -1;
 511 }
 512
 513 static int config_set(uint32_t key, GVariant *data,
 514         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 515 {
 516         struct dev_context *devc;
 517         uint64_t arg;
 518         int i, ret;
 519         gdouble low, high;
 520
 521         (void)cg;
 522
 523         if (!sdi)
 524                 return SR_ERR_ARG;
 525
 526         if (sdi->status != SR_ST_ACTIVE)
 527                 return SR_ERR;
 528
 529         devc = sdi->priv;
 530
 531         ret = SR_OK;
 532
 533         switch (key) {
 534         case SR_CONF_SAMPLERATE:
 535                 arg = g_variant_get_uint64(data);
 536                 for (i = 0; i < devc->num_samplerates; i++) {
 537                         if (devc->samplerates[i] == arg) {
 538                                 devc->cur_samplerate = arg;
 539                                 break;
 540                         }
 541                 }
 542                 if (i == devc->num_samplerates)
 543                         ret = SR_ERR_ARG;
 544                 break;
 545         case SR_CONF_LIMIT_SAMPLES:
 546                 devc->limit_samples = g_variant_get_uint64(data);
 547                 break;
 548         case SR_CONF_CAPTURE_RATIO:
 549                 devc->capture_ratio = g_variant_get_uint64(data);
 550                 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
 551                 break;
 552         case SR_CONF_VOLTAGE_THRESHOLD:
 553                 g_variant_get(data, "(dd)", &low, &high);
 554                 ret = SR_ERR_ARG;
 555                 for (i = 0; (unsigned int)i < ARRAY_SIZE(volt_thresholds); i++) {
 556                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 557                             fabs(volt_thresholds[i].high - high) < 0.1) {
 558                                 devc->voltage_threshold = volt_thresholds[i].range;
 559                                 break;
 560                         }
 561                 }
 562                 ret = dslogic_fpga_firmware_upload(sdi);
 563                 break;
 564         case SR_CONF_EXTERNAL_CLOCK:
 565                 devc->external_clock = g_variant_get_boolean(data);
 566                 break;
 567         case SR_CONF_CONTINUOUS:
 568                 devc->continuous_mode = g_variant_get_boolean(data);
 569                 break;
 570         case SR_CONF_CLOCK_EDGE:
 571                 i = lookup_index(data, signal_edge_names,
 572                                    ARRAY_SIZE(signal_edge_names));
 573                 if (i < 0)
 574                         return SR_ERR_ARG;
 575                 devc->clock_edge = i;
 576                 break;
 577         default:
 578                 ret = SR_ERR_NA;
 579         }
 580
 581         return ret;
 582 }
 583
 584 static int config_list(uint32_t key, GVariant **data,
 585         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 586 {
 587         struct dev_context *devc;
 588         GVariant *gvar, *range[2];
 589         GVariantBuilder gvb;
 590         unsigned int i;
 591
 592         (void)cg;
 593
 594         switch (key) {
 595         case SR_CONF_SCAN_OPTIONS:
 596                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 597                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 598                 break;
 599         case SR_CONF_DEVICE_OPTIONS:
 600                 if (!sdi) {
 601                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 602                                 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 603                 } else {
 604                         devc = sdi->priv;
 605                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 606                                                           devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 607                 }
 608                 break;
 609         case SR_CONF_VOLTAGE_THRESHOLD:
 610                 if (!sdi->priv)
 611                         return SR_ERR_ARG;
 612                 devc = sdi->priv;
 613                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 614                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 615                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 616                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 617                         gvar = g_variant_new_tuple(range, 2);
 618                         g_variant_builder_add_value(&gvb, gvar);
 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 int receive_data(int fd, int revents, void *cb_data)
 642 {
 643         struct timeval tv;
 644         struct drv_context *drvc;
 645
 646         (void)fd;
 647         (void)revents;
 648
 649         drvc = (struct drv_context *)cb_data;
 650
 651         tv.tv_sec = tv.tv_usec = 0;
 652         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 653
 654         return TRUE;
 655 }
 656
 657 static int start_transfers(const struct sr_dev_inst *sdi)
 658 {
 659         struct dev_context *devc;
 660         struct sr_usb_dev_inst *usb;
 661         struct libusb_transfer *transfer;
 662         unsigned int i, num_transfers;
 663         int timeout, ret;
 664         unsigned char *buf;
 665         size_t size;
 666
 667         devc = sdi->priv;
 668         usb = sdi->conn;
 669
 670         devc->sent_samples = 0;
 671         devc->acq_aborted = FALSE;
 672         devc->empty_transfer_count = 0;
 673         devc->trigger_fired = TRUE;
 674
 675         num_transfers = dslogic_get_number_of_transfers(devc);
 676
 677         if (devc->cur_samplerate == SR_MHZ(100))
 678                 num_transfers = 16;
 679         else if (devc->cur_samplerate == SR_MHZ(200))
 680                 num_transfers = 8;
 681         else if (devc->cur_samplerate == SR_MHZ(400))
 682                 num_transfers = 4;
 683
 684         size = dslogic_get_buffer_size(devc);
 685         devc->submitted_transfers = 0;
 686
 687         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 688         if (!devc->transfers) {
 689                 sr_err("USB transfers malloc failed.");
 690                 return SR_ERR_MALLOC;
 691         }
 692
 693         timeout = dslogic_get_timeout(devc);
 694         devc->num_transfers = num_transfers;
 695         for (i = 0; i < num_transfers; i++) {
 696                 if (!(buf = g_try_malloc(size))) {
 697                         sr_err("USB transfer buffer malloc failed.");
 698                         return SR_ERR_MALLOC;
 699                 }
 700                 transfer = libusb_alloc_transfer(0);
 701                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 702                                 6 | LIBUSB_ENDPOINT_IN, buf, size,
 703                                 dslogic_receive_transfer, (void *)sdi, timeout);
 704                 sr_info("submitting transfer: %d", i);
 705                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 706                         sr_err("Failed to submit transfer: %s.",
 707                                libusb_error_name(ret));
 708                         libusb_free_transfer(transfer);
 709                         g_free(buf);
 710                         dslogic_abort_acquisition(devc);
 711                         return SR_ERR;
 712                 }
 713                 devc->transfers[i] = transfer;
 714                 devc->submitted_transfers++;
 715         }
 716
 717         std_session_send_df_header(sdi);
 718
 719         return SR_OK;
 720 }
 721
 722 static void LIBUSB_CALL trigger_receive(struct libusb_transfer *transfer)
 723 {
 724         const struct sr_dev_inst *sdi;
 725         struct dslogic_trigger_pos *tpos;
 726         struct dev_context *devc;
 727
 728         sdi = transfer->user_data;
 729         devc = sdi->priv;
 730         if (transfer->status == LIBUSB_TRANSFER_CANCELLED) {
 731                 sr_dbg("Trigger transfer canceled.");
 732                 /* Terminate session. */
 733                 std_session_send_df_end(sdi);
 734                 usb_source_remove(sdi->session, devc->ctx);
 735                 devc->num_transfers = 0;
 736                 g_free(devc->transfers);
 737         } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED
 738                         && transfer->actual_length == sizeof(struct dslogic_trigger_pos)) {
 739                 tpos = (struct dslogic_trigger_pos *)transfer->buffer;
 740                 sr_info("tpos real_pos %d ram_saddr %d cnt %d", tpos->real_pos,
 741                         tpos->ram_saddr, tpos->remain_cnt);
 742                 devc->trigger_pos = tpos->real_pos;
 743                 g_free(tpos);
 744                 start_transfers(sdi);
 745         }
 746         libusb_free_transfer(transfer);
 747 }
 748
 749 static int trigger_request(const struct sr_dev_inst *sdi)
 750 {
 751         struct sr_usb_dev_inst *usb;
 752         struct libusb_transfer *transfer;
 753         struct dslogic_trigger_pos *tpos;
 754         struct dev_context *devc;
 755         int ret;
 756
 757         usb = sdi->conn;
 758         devc = sdi->priv;
 759
 760         if ((ret = dslogic_stop_acquisition(sdi)) != SR_OK)
 761                 return ret;
 762
 763         if ((ret = dslogic_fpga_configure(sdi)) != SR_OK)
 764                 return ret;
 765
 766         /* If this is a DSLogic Pro, set the voltage threshold. */
 767         if (!strcmp(devc->profile->model, "DSLogic Pro")){
 768                 if (devc->voltage_threshold == DS_VOLTAGE_RANGE_18_33_V) {
 769                         dslogic_set_vth(sdi, 1.4);
 770                 } else {
 771                         dslogic_set_vth(sdi, 3.3);
 772                 }
 773         }
 774
 775         if ((ret = dslogic_start_acquisition(sdi)) != SR_OK)
 776                 return ret;
 777
 778         sr_dbg("Getting trigger.");
 779         tpos = g_malloc(sizeof(struct dslogic_trigger_pos));
 780         transfer = libusb_alloc_transfer(0);
 781         libusb_fill_bulk_transfer(transfer, usb->devhdl, 6 | LIBUSB_ENDPOINT_IN,
 782                         (unsigned char *)tpos, sizeof(struct dslogic_trigger_pos),
 783                         trigger_receive, (void *)sdi, 0);
 784         if ((ret = libusb_submit_transfer(transfer)) < 0) {
 785                 sr_err("Failed to request trigger: %s.", libusb_error_name(ret));
 786                 libusb_free_transfer(transfer);
 787                 g_free(tpos);
 788                 return SR_ERR;
 789         }
 790
 791         devc->transfers = g_try_malloc0(sizeof(*devc->transfers));
 792         if (!devc->transfers) {
 793                 sr_err("USB trigger_pos transfer malloc failed.");
 794                 return SR_ERR_MALLOC;
 795         }
 796         devc->num_transfers = 1;
 797         devc->submitted_transfers++;
 798         devc->transfers[0] = transfer;
 799
 800         return ret;
 801 }
 802
 803 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 804 {
 805         struct sr_dev_driver *di;
 806         struct drv_context *drvc;
 807         struct dev_context *devc;
 808         int timeout;
 809
 810         if (sdi->status != SR_ST_ACTIVE)
 811                 return SR_ERR_DEV_CLOSED;
 812
 813         di = sdi->driver;
 814         drvc = di->context;
 815         devc = sdi->priv;
 816
 817         devc->ctx = drvc->sr_ctx;
 818         devc->sent_samples = 0;
 819         devc->empty_transfer_count = 0;
 820         devc->acq_aborted = FALSE;
 821
 822         timeout = dslogic_get_timeout(devc);
 823         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, drvc);
 824
 825         trigger_request(sdi);
 826
 827         return SR_OK;
 828 }
 829
 830 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 831 {
 832         dslogic_stop_acquisition(sdi);
 833
 834         dslogic_abort_acquisition(sdi->priv);
 835
 836         return SR_OK;
 837 }
 838
 839 static struct sr_dev_driver dslogic_driver_info = {
 840         .name = "dslogic",
 841         .longname = "DreamSourceLabs DSLogic",
 842         .api_version = 1,
 843         .init = std_init,
 844         .cleanup = std_cleanup,
 845         .scan = scan,
 846         .dev_list = std_dev_list,
 847         .dev_clear = dev_clear,
 848         .config_get = config_get,
 849         .config_set = config_set,
 850         .config_list = config_list,
 851         .dev_open = dev_open,
 852         .dev_close = dev_close,
 853         .dev_acquisition_start = dev_acquisition_start,
 854         .dev_acquisition_stop = dev_acquisition_stop,
 855         .context = NULL,
 856 };
 857 SR_REGISTER_DEV_DRIVER(dslogic_driver_info);