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 */
  28         { 0x2a0e, 0x0001, "DreamSourceLab", "DSLogic", NULL,
  29                 "dreamsourcelab-dslogic-fx2.fw",
  30                 0, "DreamSourceLab", "DSLogic"},
  31         /* DreamSourceLab DSCope */
  32         { 0x2a0e, 0x0002, "DreamSourceLab", "DSCope", NULL,
  33                 "dreamsourcelab-dscope-fx2.fw",
  34                 0, "DreamSourceLab", "DSCope"},
  35         /* DreamSourceLab DSLogic Pro */
  36         { 0x2a0e, 0x0003, "DreamSourceLab", "DSLogic Pro", NULL,
  37                 "dreamsourcelab-dslogic-pro-fx2.fw",
  38                 0, "DreamSourceLab", "DSLogic"},
  39         /* DreamSourceLab DSLogic Plus */
  40         { 0x2a0e, 0x0020, "DreamSourceLab", "DSLogic Plus", NULL,
  41                 "dreamsourcelab-dslogic-plus-fx2.fw",
  42                 0, "DreamSourceLab", "DSLogic"},
  43         /* DreamSourceLab DSLogic Basic */
  44         { 0x2a0e, 0x0021, "DreamSourceLab", "DSLogic Basic", NULL,
  45                 "dreamsourcelab-dslogic-basic-fx2.fw",
  46                 0, "DreamSourceLab", "DSLogic"},
  47
  48         ALL_ZERO
  49 };
  50
  51 static const uint32_t drvopts[] = {
  52         SR_CONF_LOGIC_ANALYZER,
  53 };
  54
  55 static const uint32_t scanopts[] = {
  56         SR_CONF_CONN,
  57 };
  58
  59 static const uint32_t devopts[] = {
  60         SR_CONF_CONTINUOUS | SR_CONF_SET | SR_CONF_GET,
  61         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  62         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  63         SR_CONF_CONN | SR_CONF_GET,
  64         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  65         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  66         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  67         SR_CONF_EXTERNAL_CLOCK | SR_CONF_GET | SR_CONF_SET,
  68         SR_CONF_CLOCK_EDGE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  69 };
  70
  71 /* Names assigned to available edge slope choices. */
  72 static const char *const signal_edge_names[] = {
  73         [DS_EDGE_RISING] = "rising",
  74         [DS_EDGE_FALLING] = "falling",
  75 };
  76
  77 static const struct {
  78         int range;
  79         gdouble low;
  80         gdouble high;
  81 } volt_thresholds[] = {
  82         { DS_VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
  83         { DS_VOLTAGE_RANGE_5_V, 1.4, 3.6 },
  84 };
  85
  86 static const uint64_t samplerates[] = {
  87         SR_KHZ(10),
  88         SR_KHZ(20),
  89         SR_KHZ(50),
  90         SR_KHZ(100),
  91         SR_KHZ(200),
  92         SR_KHZ(500),
  93         SR_MHZ(1),
  94         SR_MHZ(2),
  95         SR_MHZ(5),
  96         SR_MHZ(10),
  97         SR_MHZ(20),
  98         SR_MHZ(25),
  99         SR_MHZ(50),
 100         SR_MHZ(100),
 101         SR_MHZ(200),
 102         SR_MHZ(400),
 103 };
 104
 105 static gboolean is_plausible(const struct libusb_device_descriptor *des)
 106 {
 107         int i;
 108
 109         for (i = 0; supported_device[i].vid; i++) {
 110                 if (des->idVendor != supported_device[i].vid)
 111                         continue;
 112                 if (des->idProduct == supported_device[i].pid)
 113                         return TRUE;
 114         }
 115
 116         return FALSE;
 117 }
 118
 119 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 120 {
 121         struct drv_context *drvc;
 122         struct dev_context *devc;
 123         struct sr_dev_inst *sdi;
 124         struct sr_usb_dev_inst *usb;
 125         struct sr_channel *ch;
 126         struct sr_channel_group *cg;
 127         struct sr_config *src;
 128         const struct dslogic_profile *prof;
 129         GSList *l, *devices, *conn_devices;
 130         gboolean has_firmware;
 131         struct libusb_device_descriptor des;
 132         libusb_device **devlist;
 133         struct libusb_device_handle *hdl;
 134         int ret, i, j;
 135         const char *conn;
 136         char manufacturer[64], product[64], serial_num[64], connection_id[64];
 137         char channel_name[16];
 138
 139         drvc = di->context;
 140
 141         conn = NULL;
 142         for (l = options; l; l = l->next) {
 143                 src = l->data;
 144                 switch (src->key) {
 145                 case SR_CONF_CONN:
 146                         conn = g_variant_get_string(src->data, NULL);
 147                         break;
 148                 }
 149         }
 150         if (conn)
 151                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 152         else
 153                 conn_devices = NULL;
 154
 155         /* Find all dslogic compatible devices and upload firmware to them. */
 156         devices = NULL;
 157         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 158         for (i = 0; devlist[i]; i++) {
 159                 if (conn) {
 160                         usb = NULL;
 161                         for (l = conn_devices; l; l = l->next) {
 162                                 usb = l->data;
 163                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 164                                         && usb->address == libusb_get_device_address(devlist[i]))
 165                                         break;
 166                         }
 167                         if (!l)
 168                                 /* This device matched none of the ones that
 169                                  * matched the conn specification. */
 170                                 continue;
 171                 }
 172
 173                 libusb_get_device_descriptor( devlist[i], &des);
 174
 175                 if (!is_plausible(&des))
 176                         continue;
 177
 178                 if ((ret = libusb_open(devlist[i], &hdl)) < 0) {
 179                         sr_warn("Failed to open potential device with "
 180                                 "VID:PID %04x:%04x: %s.", des.idVendor,
 181                                 des.idProduct, libusb_error_name(ret));
 182                         continue;
 183                 }
 184
 185                 if (des.iManufacturer == 0) {
 186                         manufacturer[0] = '\0';
 187                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 188                                 des.iManufacturer, (unsigned char *) manufacturer,
 189                                 sizeof(manufacturer))) < 0) {
 190                         sr_warn("Failed to get manufacturer string descriptor: %s.",
 191                                 libusb_error_name(ret));
 192                         continue;
 193                 }
 194
 195                 if (des.iProduct == 0) {
 196                         product[0] = '\0';
 197                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 198                                 des.iProduct, (unsigned char *) product,
 199                                 sizeof(product))) < 0) {
 200                         sr_warn("Failed to get product string descriptor: %s.",
 201                                 libusb_error_name(ret));
 202                         continue;
 203                 }
 204
 205                 if (des.iSerialNumber == 0) {
 206                         serial_num[0] = '\0';
 207                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 208                                 des.iSerialNumber, (unsigned char *) serial_num,
 209                                 sizeof(serial_num))) < 0) {
 210                         sr_warn("Failed to get serial number string descriptor: %s.",
 211                                 libusb_error_name(ret));
 212                         continue;
 213                 }
 214
 215                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 216
 217                 libusb_close(hdl);
 218
 219                 prof = NULL;
 220                 for (j = 0; supported_device[j].vid; j++) {
 221                         if (des.idVendor == supported_device[j].vid &&
 222                                         des.idProduct == supported_device[j].pid &&
 223                                         (!strcmp(manufacturer, supported_device[j].usb_manufacturer)) &&
 224                                         (!strcmp(product, "USB-based Instrument") ||
 225                                                 !strcmp(product, supported_device[j].usb_product))) {
 226                                 prof = &supported_device[j];
 227                                 break;
 228                         }
 229                 }
 230
 231                 /* Skip if the device was not found. */
 232                 if (!prof)
 233                         continue;
 234
 235                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 236                 sdi->status = SR_ST_INITIALIZING;
 237                 sdi->vendor = g_strdup(prof->vendor);
 238                 sdi->model = g_strdup(prof->model);
 239                 sdi->version = g_strdup(prof->model_version);
 240                 sdi->serial_num = g_strdup(serial_num);
 241                 sdi->connection_id = g_strdup(connection_id);
 242
 243                 /* Logic channels, all in one channel group. */
 244                 cg = g_malloc0(sizeof(struct sr_channel_group));
 245                 cg->name = g_strdup("Logic");
 246                 for (j = 0; j < 16; j++) {
 247                         sprintf(channel_name, "%d", j);
 248                         ch = sr_channel_new(sdi, j, SR_CHANNEL_LOGIC,
 249                                                 TRUE, channel_name);
 250                         cg->channels = g_slist_append(cg->channels, ch);
 251                 }
 252                 sdi->channel_groups = g_slist_append(NULL, cg);
 253
 254                 devc = dslogic_dev_new();
 255                 devc->profile = prof;
 256                 sdi->priv = devc;
 257                 devices = g_slist_append(devices, sdi);
 258
 259                 devc->samplerates = samplerates;
 260                 devc->num_samplerates = ARRAY_SIZE(samplerates);
 261                 has_firmware = usb_match_manuf_prod(devlist[i], "DreamSourceLab", "USB-based Instrument");
 262
 263                 if (has_firmware) {
 264                         /* Already has the firmware, so fix the new address. */
 265                         sr_dbg("Found an dslogic device.");
 266                         sdi->status = SR_ST_INACTIVE;
 267                         sdi->inst_type = SR_INST_USB;
 268                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 269                                         libusb_get_device_address(devlist[i]), NULL);
 270                 } else {
 271                         if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 272                                         USB_CONFIGURATION, prof->firmware) == SR_OK)
 273                                 /* Store when this device's FW was updated. */
 274                                 devc->fw_updated = g_get_monotonic_time();
 275                         else
 276                                 sr_err("Firmware upload failed for "
 277                                        "device %d.%d (logical).",
 278                                        libusb_get_bus_number(devlist[i]),
 279                                        libusb_get_device_address(devlist[i]));
 280                         sdi->inst_type = SR_INST_USB;
 281                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 282                                         0xff, NULL);
 283                 }
 284         }
 285         libusb_free_device_list(devlist, 1);
 286         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 287
 288         return std_scan_complete(di, devices);
 289 }
 290
 291 static void clear_dev_context(void *priv)
 292 {
 293         struct dev_context *devc;
 294
 295         devc = priv;
 296         g_free(devc);
 297 }
 298
 299 static int dev_clear(const struct sr_dev_driver *di)
 300 {
 301         return std_dev_clear(di, clear_dev_context);
 302 }
 303
 304 static int dev_open(struct sr_dev_inst *sdi)
 305 {
 306         struct sr_dev_driver *di = sdi->driver;
 307         struct sr_usb_dev_inst *usb;
 308         struct dev_context *devc;
 309         int ret;
 310         int64_t timediff_us, timediff_ms;
 311
 312         devc = sdi->priv;
 313         usb = sdi->conn;
 314
 315         /*
 316          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 317          * milliseconds for the FX2 to renumerate.
 318          */
 319         ret = SR_ERR;
 320         if (devc->fw_updated > 0) {
 321                 sr_info("Waiting for device to reset.");
 322                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 323                 g_usleep(300 * 1000);
 324                 timediff_ms = 0;
 325                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 326                         if ((ret = dslogic_dev_open(sdi, di)) == SR_OK)
 327                                 break;
 328                         g_usleep(100 * 1000);
 329
 330                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 331                         timediff_ms = timediff_us / 1000;
 332                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 333                 }
 334                 if (ret != SR_OK) {
 335                         sr_err("Device failed to renumerate.");
 336                         return SR_ERR;
 337                 }
 338                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 339         } else {
 340                 sr_info("Firmware upload was not needed.");
 341                 ret = dslogic_dev_open(sdi, di);
 342         }
 343
 344         if (ret != SR_OK) {
 345                 sr_err("Unable to open device.");
 346                 return SR_ERR;
 347         }
 348
 349         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 350         if (ret != 0) {
 351                 switch (ret) {
 352                 case LIBUSB_ERROR_BUSY:
 353                         sr_err("Unable to claim USB interface. Another "
 354                                "program or driver has already claimed it.");
 355                         break;
 356                 case LIBUSB_ERROR_NO_DEVICE:
 357                         sr_err("Device has been disconnected.");
 358                         break;
 359                 default:
 360                         sr_err("Unable to claim interface: %s.",
 361                                libusb_error_name(ret));
 362                         break;
 363                 }
 364
 365                 return SR_ERR;
 366         }
 367
 368
 369         if ((ret = dslogic_fpga_firmware_upload(sdi)) != SR_OK)
 370                 return ret;
 371
 372         if (devc->cur_samplerate == 0) {
 373                 /* Samplerate hasn't been set; default to the slowest one. */
 374                 devc->cur_samplerate = devc->samplerates[0];
 375         }
 376
 377         return SR_OK;
 378 }
 379
 380 static int dev_close(struct sr_dev_inst *sdi)
 381 {
 382         struct sr_usb_dev_inst *usb;
 383
 384         usb = sdi->conn;
 385
 386         if (!usb->devhdl)
 387                 return SR_ERR;
 388
 389         sr_info("dslogic: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 390                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 391         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 392         libusb_close(usb->devhdl);
 393         usb->devhdl = NULL;
 394         sdi->status = SR_ST_INACTIVE;
 395
 396         return SR_OK;
 397 }
 398
 399 static int config_get(uint32_t key, GVariant **data,
 400         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 401 {
 402         struct dev_context *devc;
 403         struct sr_usb_dev_inst *usb;
 404         GVariant *range[2];
 405         unsigned int i;
 406         char str[128];
 407
 408         (void)cg;
 409
 410         if (!sdi)
 411                 return SR_ERR_ARG;
 412
 413         devc = sdi->priv;
 414
 415         switch (key) {
 416         case SR_CONF_CONN:
 417                 if (!sdi->conn)
 418                         return SR_ERR_ARG;
 419                 usb = sdi->conn;
 420                 if (usb->address == 255)
 421                         /* Device still needs to re-enumerate after firmware
 422                          * upload, so we don't know its (future) address. */
 423                         return SR_ERR;
 424                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 425                 *data = g_variant_new_string(str);
 426                 break;
 427         case SR_CONF_VOLTAGE_THRESHOLD:
 428                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 429                         if (volt_thresholds[i].range != devc->voltage_threshold)
 430                                 continue;
 431                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 432                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 433                         *data = g_variant_new_tuple(range, 2);
 434                         break;
 435                 }
 436                 break;
 437         case SR_CONF_LIMIT_SAMPLES:
 438                 *data = g_variant_new_uint64(devc->limit_samples);
 439                 break;
 440         case SR_CONF_SAMPLERATE:
 441                 *data = g_variant_new_uint64(devc->cur_samplerate);
 442                 break;
 443         case SR_CONF_CAPTURE_RATIO:
 444                 *data = g_variant_new_uint64(devc->capture_ratio);
 445                 break;
 446         case SR_CONF_EXTERNAL_CLOCK:
 447                 *data = g_variant_new_boolean(devc->external_clock);
 448                 break;
 449         case SR_CONF_CONTINUOUS:
 450                 *data = g_variant_new_boolean(devc->continuous_mode);
 451                 break;
 452         case SR_CONF_CLOCK_EDGE:
 453                 i = devc->clock_edge;
 454                 if (i >= ARRAY_SIZE(signal_edge_names))
 455                         return SR_ERR_BUG;
 456                 *data = g_variant_new_string(signal_edge_names[0]);
 457                 break;
 458         default:
 459                 return SR_ERR_NA;
 460         }
 461
 462         return SR_OK;
 463 }
 464
 465 /*
 466  * Helper for mapping a string-typed configuration value to an index
 467  * within a table of possible values.
 468  */
 469 static int lookup_index(GVariant *value, const char *const *table, int len)
 470 {
 471         const char *entry;
 472         int i;
 473
 474         entry = g_variant_get_string(value, NULL);
 475         if (!entry)
 476                 return -1;
 477
 478         /* Linear search is fine for very small tables. */
 479         for (i = 0; i < len; i++) {
 480                 if (strcmp(entry, table[i]) == 0)
 481                         return i;
 482         }
 483
 484         return -1;
 485 }
 486
 487 static int config_set(uint32_t key, GVariant *data,
 488         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 489 {
 490         struct dev_context *devc;
 491         uint64_t arg;
 492         int i, ret;
 493         gdouble low, high;
 494
 495         (void)cg;
 496
 497         if (!sdi)
 498                 return SR_ERR_ARG;
 499
 500         if (sdi->status != SR_ST_ACTIVE)
 501                 return SR_ERR;
 502
 503         devc = sdi->priv;
 504
 505         ret = SR_OK;
 506
 507         switch (key) {
 508         case SR_CONF_SAMPLERATE:
 509                 arg = g_variant_get_uint64(data);
 510                 for (i = 0; i < devc->num_samplerates; i++) {
 511                         if (devc->samplerates[i] == arg) {
 512                                 devc->cur_samplerate = arg;
 513                                 break;
 514                         }
 515                 }
 516                 if (i == devc->num_samplerates)
 517                         ret = SR_ERR_ARG;
 518                 break;
 519         case SR_CONF_LIMIT_SAMPLES:
 520                 devc->limit_samples = g_variant_get_uint64(data);
 521                 break;
 522         case SR_CONF_CAPTURE_RATIO:
 523                 devc->capture_ratio = g_variant_get_uint64(data);
 524                 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
 525                 break;
 526         case SR_CONF_VOLTAGE_THRESHOLD:
 527                 g_variant_get(data, "(dd)", &low, &high);
 528                 ret = SR_ERR_ARG;
 529                 for (i = 0; (unsigned int)i < ARRAY_SIZE(volt_thresholds); i++) {
 530                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 531                             fabs(volt_thresholds[i].high - high) < 0.1) {
 532                                 devc->voltage_threshold = volt_thresholds[i].range;
 533                                 break;
 534                         }
 535                 }
 536                 ret = dslogic_fpga_firmware_upload(sdi);
 537                 break;
 538         case SR_CONF_EXTERNAL_CLOCK:
 539                 devc->external_clock = g_variant_get_boolean(data);
 540                 break;
 541         case SR_CONF_CONTINUOUS:
 542                 devc->continuous_mode = g_variant_get_boolean(data);
 543                 break;
 544         case SR_CONF_CLOCK_EDGE:
 545                 i = lookup_index(data, signal_edge_names,
 546                                    ARRAY_SIZE(signal_edge_names));
 547                 if (i < 0)
 548                         return SR_ERR_ARG;
 549                 devc->clock_edge = i;
 550                 break;
 551         default:
 552                 ret = SR_ERR_NA;
 553         }
 554
 555         return ret;
 556 }
 557
 558 static int config_list(uint32_t key, GVariant **data,
 559         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 560 {
 561         struct dev_context *devc;
 562         GVariant *gvar, *range[2];
 563         GVariantBuilder gvb;
 564         unsigned int i;
 565
 566         (void)cg;
 567
 568         switch (key) {
 569         case SR_CONF_SCAN_OPTIONS:
 570                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 571                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 572                 break;
 573         case SR_CONF_DEVICE_OPTIONS:
 574                 if (!sdi) {
 575                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 576                                 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 577                 } else {
 578                         devc = sdi->priv;
 579                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 580                                                           devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 581                 }
 582                 break;
 583         case SR_CONF_VOLTAGE_THRESHOLD:
 584                 if (!sdi->priv)
 585                         return SR_ERR_ARG;
 586                 devc = sdi->priv;
 587                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 588                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 589                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 590                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 591                         gvar = g_variant_new_tuple(range, 2);
 592                         g_variant_builder_add_value(&gvb, gvar);
 593                 }
 594                 *data = g_variant_builder_end(&gvb);
 595                 break;
 596         case SR_CONF_SAMPLERATE:
 597                 devc = sdi->priv;
 598                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 599                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), devc->samplerates,
 600                                 devc->num_samplerates, sizeof(uint64_t));
 601                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 602                 *data = g_variant_builder_end(&gvb);
 603                 break;
 604         case SR_CONF_CLOCK_EDGE:
 605                 *data = g_variant_new_strv(signal_edge_names,
 606                         ARRAY_SIZE(signal_edge_names));
 607                 break;
 608         default:
 609                 return SR_ERR_NA;
 610         }
 611
 612         return SR_OK;
 613 }
 614
 615 static int receive_data(int fd, int revents, void *cb_data)
 616 {
 617         struct timeval tv;
 618         struct drv_context *drvc;
 619
 620         (void)fd;
 621         (void)revents;
 622
 623         drvc = (struct drv_context *)cb_data;
 624
 625         tv.tv_sec = tv.tv_usec = 0;
 626         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 627
 628         return TRUE;
 629 }
 630
 631 static int start_transfers(const struct sr_dev_inst *sdi)
 632 {
 633         struct dev_context *devc;
 634         struct sr_usb_dev_inst *usb;
 635         struct libusb_transfer *transfer;
 636         unsigned int i, num_transfers;
 637         int timeout, ret;
 638         unsigned char *buf;
 639         size_t size;
 640
 641         devc = sdi->priv;
 642         usb = sdi->conn;
 643
 644         devc->sent_samples = 0;
 645         devc->acq_aborted = FALSE;
 646         devc->empty_transfer_count = 0;
 647         devc->trigger_fired = TRUE;
 648
 649         num_transfers = dslogic_get_number_of_transfers(devc);
 650
 651         if (devc->cur_samplerate == SR_MHZ(100))
 652                 num_transfers = 16;
 653         else if (devc->cur_samplerate == SR_MHZ(200))
 654                 num_transfers = 8;
 655         else if (devc->cur_samplerate == SR_MHZ(400))
 656                 num_transfers = 4;
 657
 658         size = dslogic_get_buffer_size(devc);
 659         devc->submitted_transfers = 0;
 660
 661         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 662         if (!devc->transfers) {
 663                 sr_err("USB transfers malloc failed.");
 664                 return SR_ERR_MALLOC;
 665         }
 666
 667         timeout = dslogic_get_timeout(devc);
 668         devc->num_transfers = num_transfers;
 669         for (i = 0; i < num_transfers; i++) {
 670                 if (!(buf = g_try_malloc(size))) {
 671                         sr_err("USB transfer buffer malloc failed.");
 672                         return SR_ERR_MALLOC;
 673                 }
 674                 transfer = libusb_alloc_transfer(0);
 675                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 676                                 6 | LIBUSB_ENDPOINT_IN, buf, size,
 677                                 dslogic_receive_transfer, (void *)sdi, timeout);
 678                 sr_info("submitting transfer: %d", i);
 679                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 680                         sr_err("Failed to submit transfer: %s.",
 681                                libusb_error_name(ret));
 682                         libusb_free_transfer(transfer);
 683                         g_free(buf);
 684                         dslogic_abort_acquisition(devc);
 685                         return SR_ERR;
 686                 }
 687                 devc->transfers[i] = transfer;
 688                 devc->submitted_transfers++;
 689         }
 690
 691         std_session_send_df_header(sdi);
 692
 693         return SR_OK;
 694 }
 695
 696 static void LIBUSB_CALL trigger_receive(struct libusb_transfer *transfer)
 697 {
 698         const struct sr_dev_inst *sdi;
 699         struct dslogic_trigger_pos *tpos;
 700         struct dev_context *devc;
 701
 702         sdi = transfer->user_data;
 703         devc = sdi->priv;
 704         if (transfer->status == LIBUSB_TRANSFER_CANCELLED) {
 705                 sr_dbg("Trigger transfer canceled.");
 706                 /* Terminate session. */
 707                 std_session_send_df_end(sdi);
 708                 usb_source_remove(sdi->session, devc->ctx);
 709                 devc->num_transfers = 0;
 710                 g_free(devc->transfers);
 711         } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED
 712                         && transfer->actual_length == sizeof(struct dslogic_trigger_pos)) {
 713                 tpos = (struct dslogic_trigger_pos *)transfer->buffer;
 714                 sr_info("tpos real_pos %d ram_saddr %d cnt %d", tpos->real_pos,
 715                         tpos->ram_saddr, tpos->remain_cnt);
 716                 devc->trigger_pos = tpos->real_pos;
 717                 g_free(tpos);
 718                 start_transfers(sdi);
 719         }
 720         libusb_free_transfer(transfer);
 721 }
 722
 723 static int trigger_request(const struct sr_dev_inst *sdi)
 724 {
 725         struct sr_usb_dev_inst *usb;
 726         struct libusb_transfer *transfer;
 727         struct dslogic_trigger_pos *tpos;
 728         struct dev_context *devc;
 729         int ret;
 730
 731         usb = sdi->conn;
 732         devc = sdi->priv;
 733
 734         if ((ret = dslogic_stop_acquisition(sdi)) != SR_OK)
 735                 return ret;
 736
 737         if ((ret = dslogic_fpga_configure(sdi)) != SR_OK)
 738                 return ret;
 739
 740         /* If this is a DSLogic Pro, set the voltage threshold. */
 741         if (!strcmp(devc->profile->model, "DSLogic Pro")){
 742                 if (devc->voltage_threshold == DS_VOLTAGE_RANGE_18_33_V) {
 743                         dslogic_set_vth(sdi, 1.4);
 744                 } else {
 745                         dslogic_set_vth(sdi, 3.3);
 746                 }
 747         }
 748
 749         if ((ret = dslogic_start_acquisition(sdi)) != SR_OK)
 750                 return ret;
 751
 752         sr_dbg("Getting trigger.");
 753         tpos = g_malloc(sizeof(struct dslogic_trigger_pos));
 754         transfer = libusb_alloc_transfer(0);
 755         libusb_fill_bulk_transfer(transfer, usb->devhdl, 6 | LIBUSB_ENDPOINT_IN,
 756                         (unsigned char *)tpos, sizeof(struct dslogic_trigger_pos),
 757                         trigger_receive, (void *)sdi, 0);
 758         if ((ret = libusb_submit_transfer(transfer)) < 0) {
 759                 sr_err("Failed to request trigger: %s.", libusb_error_name(ret));
 760                 libusb_free_transfer(transfer);
 761                 g_free(tpos);
 762                 return SR_ERR;
 763         }
 764
 765         devc->transfers = g_try_malloc0(sizeof(*devc->transfers));
 766         if (!devc->transfers) {
 767                 sr_err("USB trigger_pos transfer malloc failed.");
 768                 return SR_ERR_MALLOC;
 769         }
 770         devc->num_transfers = 1;
 771         devc->submitted_transfers++;
 772         devc->transfers[0] = transfer;
 773
 774         return ret;
 775 }
 776
 777 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 778 {
 779         struct sr_dev_driver *di;
 780         struct drv_context *drvc;
 781         struct dev_context *devc;
 782         int timeout;
 783
 784         if (sdi->status != SR_ST_ACTIVE)
 785                 return SR_ERR_DEV_CLOSED;
 786
 787         di = sdi->driver;
 788         drvc = di->context;
 789         devc = sdi->priv;
 790
 791         devc->ctx = drvc->sr_ctx;
 792         devc->sent_samples = 0;
 793         devc->empty_transfer_count = 0;
 794         devc->acq_aborted = FALSE;
 795
 796         timeout = dslogic_get_timeout(devc);
 797         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, drvc);
 798
 799         trigger_request(sdi);
 800
 801         return SR_OK;
 802 }
 803
 804 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 805 {
 806         dslogic_stop_acquisition(sdi);
 807
 808         dslogic_abort_acquisition(sdi->priv);
 809
 810         return SR_OK;
 811 }
 812
 813 static struct sr_dev_driver dslogic_driver_info = {
 814         .name = "dslogic",
 815         .longname = "DreamSourceLabs DSLogic",
 816         .api_version = 1,
 817         .init = std_init,
 818         .cleanup = std_cleanup,
 819         .scan = scan,
 820         .dev_list = std_dev_list,
 821         .dev_clear = dev_clear,
 822         .config_get = config_get,
 823         .config_set = config_set,
 824         .config_list = config_list,
 825         .dev_open = dev_open,
 826         .dev_close = dev_close,
 827         .dev_acquisition_start = dev_acquisition_start,
 828         .dev_acquisition_stop = dev_acquisition_stop,
 829         .context = NULL,
 830 };
 831 SR_REGISTER_DEV_DRIVER(dslogic_driver_info);