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", 256 * 1048576ULL},
  31         /* DreamSourceLab DSCope */
  32         { 0x2a0e, 0x0002, "DreamSourceLab", "DSCope", NULL,
  33                 "dreamsourcelab-dscope-fx2.fw",
  34                 0, "DreamSourceLab", "DSCope", 256 * 1048576ULL},
  35         /* DreamSourceLab DSLogic Pro */
  36         { 0x2a0e, 0x0003, "DreamSourceLab", "DSLogic Pro", NULL,
  37                 "dreamsourcelab-dslogic-pro-fx2.fw",
  38                 0, "DreamSourceLab", "DSLogic", 256 * 1048576ULL},
  39         /* DreamSourceLab DSLogic Plus */
  40         { 0x2a0e, 0x0020, "DreamSourceLab", "DSLogic Plus", NULL,
  41                 "dreamsourcelab-dslogic-plus-fx2.fw",
  42                 0, "DreamSourceLab", "DSLogic", 256 * 1048576ULL},
  43         /* DreamSourceLab DSLogic Basic */
  44         { 0x2a0e, 0x0021, "DreamSourceLab", "DSLogic Basic", NULL,
  45                 "dreamsourcelab-dslogic-basic-fx2.fw",
  46                 0, "DreamSourceLab", "DSLogic", 256 * 1024ULL},
  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         gdouble low;
  79         gdouble high;
  80 } dslogic_voltage_thresholds[] = {
  81         { 0.7, 1.4 },
  82         { 1.4, 3.6 },
  83 };
  84
  85 static const uint64_t samplerates[] = {
  86         SR_KHZ(10),
  87         SR_KHZ(20),
  88         SR_KHZ(50),
  89         SR_KHZ(100),
  90         SR_KHZ(200),
  91         SR_KHZ(500),
  92         SR_MHZ(1),
  93         SR_MHZ(2),
  94         SR_MHZ(5),
  95         SR_MHZ(10),
  96         SR_MHZ(20),
  97         SR_MHZ(25),
  98         SR_MHZ(50),
  99         SR_MHZ(100),
 100         SR_MHZ(200),
 101         SR_MHZ(400),
 102 };
 103
 104 static gboolean is_plausible(const struct libusb_device_descriptor *des)
 105 {
 106         int i;
 107
 108         for (i = 0; supported_device[i].vid; i++) {
 109                 if (des->idVendor != supported_device[i].vid)
 110                         continue;
 111                 if (des->idProduct == supported_device[i].pid)
 112                         return TRUE;
 113         }
 114
 115         return FALSE;
 116 }
 117
 118 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 119 {
 120         struct drv_context *drvc;
 121         struct dev_context *devc;
 122         struct sr_dev_inst *sdi;
 123         struct sr_usb_dev_inst *usb;
 124         struct sr_channel *ch;
 125         struct sr_channel_group *cg;
 126         struct sr_config *src;
 127         const struct dslogic_profile *prof;
 128         GSList *l, *devices, *conn_devices;
 129         gboolean has_firmware;
 130         struct libusb_device_descriptor des;
 131         libusb_device **devlist;
 132         struct libusb_device_handle *hdl;
 133         int ret, i, j;
 134         const char *conn;
 135         char manufacturer[64], product[64], serial_num[64], connection_id[64];
 136         char channel_name[16];
 137
 138         drvc = di->context;
 139
 140         conn = NULL;
 141         for (l = options; l; l = l->next) {
 142                 src = l->data;
 143                 switch (src->key) {
 144                 case SR_CONF_CONN:
 145                         conn = g_variant_get_string(src->data, NULL);
 146                         break;
 147                 }
 148         }
 149         if (conn)
 150                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 151         else
 152                 conn_devices = NULL;
 153
 154         /* Find all dslogic compatible devices and upload firmware to them. */
 155         devices = NULL;
 156         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 157         for (i = 0; devlist[i]; i++) {
 158                 if (conn) {
 159                         usb = NULL;
 160                         for (l = conn_devices; l; l = l->next) {
 161                                 usb = l->data;
 162                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 163                                         && usb->address == libusb_get_device_address(devlist[i]))
 164                                         break;
 165                         }
 166                         if (!l)
 167                                 /* This device matched none of the ones that
 168                                  * matched the conn specification. */
 169                                 continue;
 170                 }
 171
 172                 libusb_get_device_descriptor( devlist[i], &des);
 173
 174                 if (!is_plausible(&des))
 175                         continue;
 176
 177                 if ((ret = libusb_open(devlist[i], &hdl)) < 0) {
 178                         sr_warn("Failed to open potential device with "
 179                                 "VID:PID %04x:%04x: %s.", des.idVendor,
 180                                 des.idProduct, libusb_error_name(ret));
 181                         continue;
 182                 }
 183
 184                 if (des.iManufacturer == 0) {
 185                         manufacturer[0] = '\0';
 186                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 187                                 des.iManufacturer, (unsigned char *) manufacturer,
 188                                 sizeof(manufacturer))) < 0) {
 189                         sr_warn("Failed to get manufacturer string descriptor: %s.",
 190                                 libusb_error_name(ret));
 191                         continue;
 192                 }
 193
 194                 if (des.iProduct == 0) {
 195                         product[0] = '\0';
 196                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 197                                 des.iProduct, (unsigned char *) product,
 198                                 sizeof(product))) < 0) {
 199                         sr_warn("Failed to get product string descriptor: %s.",
 200                                 libusb_error_name(ret));
 201                         continue;
 202                 }
 203
 204                 if (des.iSerialNumber == 0) {
 205                         serial_num[0] = '\0';
 206                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 207                                 des.iSerialNumber, (unsigned char *) serial_num,
 208                                 sizeof(serial_num))) < 0) {
 209                         sr_warn("Failed to get serial number string descriptor: %s.",
 210                                 libusb_error_name(ret));
 211                         continue;
 212                 }
 213
 214                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 215
 216                 libusb_close(hdl);
 217
 218                 prof = NULL;
 219                 for (j = 0; supported_device[j].vid; j++) {
 220                         if (des.idVendor == supported_device[j].vid &&
 221                                         des.idProduct == supported_device[j].pid &&
 222                                         (!strcmp(manufacturer, supported_device[j].usb_manufacturer)) &&
 223                                         (!strcmp(product, "USB-based Instrument") ||
 224                                                 !strcmp(product, supported_device[j].usb_product))) {
 225                                 prof = &supported_device[j];
 226                                 break;
 227                         }
 228                 }
 229
 230                 /* Skip if the device was not found. */
 231                 if (!prof)
 232                         continue;
 233
 234                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 235                 sdi->status = SR_ST_INITIALIZING;
 236                 sdi->vendor = g_strdup(prof->vendor);
 237                 sdi->model = g_strdup(prof->model);
 238                 sdi->version = g_strdup(prof->model_version);
 239                 sdi->serial_num = g_strdup(serial_num);
 240                 sdi->connection_id = g_strdup(connection_id);
 241
 242                 /* Logic channels, all in one channel group. */
 243                 cg = g_malloc0(sizeof(struct sr_channel_group));
 244                 cg->name = g_strdup("Logic");
 245                 for (j = 0; j < 16; j++) {
 246                         sprintf(channel_name, "%d", j);
 247                         ch = sr_channel_new(sdi, j, SR_CHANNEL_LOGIC,
 248                                                 TRUE, channel_name);
 249                         cg->channels = g_slist_append(cg->channels, ch);
 250                 }
 251                 sdi->channel_groups = g_slist_append(NULL, cg);
 252
 253                 devc = dslogic_dev_new();
 254                 devc->profile = prof;
 255                 sdi->priv = devc;
 256                 devices = g_slist_append(devices, sdi);
 257
 258                 devc->samplerates = samplerates;
 259                 devc->num_samplerates = ARRAY_SIZE(samplerates);
 260                 has_firmware = usb_match_manuf_prod(devlist[i], "DreamSourceLab", "USB-based Instrument");
 261
 262                 if (has_firmware) {
 263                         /* Already has the firmware, so fix the new address. */
 264                         sr_dbg("Found an dslogic device.");
 265                         sdi->status = SR_ST_INACTIVE;
 266                         sdi->inst_type = SR_INST_USB;
 267                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 268                                         libusb_get_device_address(devlist[i]), NULL);
 269                 } else {
 270                         if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 271                                         USB_CONFIGURATION, prof->firmware) == SR_OK)
 272                                 /* Store when this device's FW was updated. */
 273                                 devc->fw_updated = g_get_monotonic_time();
 274                         else
 275                                 sr_err("Firmware upload failed for "
 276                                        "device %d.%d (logical).",
 277                                        libusb_get_bus_number(devlist[i]),
 278                                        libusb_get_device_address(devlist[i]));
 279                         sdi->inst_type = SR_INST_USB;
 280                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 281                                         0xff, NULL);
 282                 }
 283         }
 284         libusb_free_device_list(devlist, 1);
 285         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 286
 287         return std_scan_complete(di, devices);
 288 }
 289
 290 static void clear_dev_context(void *priv)
 291 {
 292         struct dev_context *devc;
 293
 294         devc = priv;
 295         g_free(devc);
 296 }
 297
 298 static int dev_clear(const struct sr_dev_driver *di)
 299 {
 300         return std_dev_clear(di, clear_dev_context);
 301 }
 302
 303 static int dev_open(struct sr_dev_inst *sdi)
 304 {
 305         struct sr_dev_driver *di = sdi->driver;
 306         struct sr_usb_dev_inst *usb;
 307         struct dev_context *devc;
 308         int ret;
 309         int64_t timediff_us, timediff_ms;
 310
 311         devc = sdi->priv;
 312         usb = sdi->conn;
 313
 314         /*
 315          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 316          * milliseconds for the FX2 to renumerate.
 317          */
 318         ret = SR_ERR;
 319         if (devc->fw_updated > 0) {
 320                 sr_info("Waiting for device to reset.");
 321                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 322                 g_usleep(300 * 1000);
 323                 timediff_ms = 0;
 324                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 325                         if ((ret = dslogic_dev_open(sdi, di)) == SR_OK)
 326                                 break;
 327                         g_usleep(100 * 1000);
 328
 329                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 330                         timediff_ms = timediff_us / 1000;
 331                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 332                 }
 333                 if (ret != SR_OK) {
 334                         sr_err("Device failed to renumerate.");
 335                         return SR_ERR;
 336                 }
 337                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 338         } else {
 339                 sr_info("Firmware upload was not needed.");
 340                 ret = dslogic_dev_open(sdi, di);
 341         }
 342
 343         if (ret != SR_OK) {
 344                 sr_err("Unable to open device.");
 345                 return SR_ERR;
 346         }
 347
 348         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 349         if (ret != 0) {
 350                 switch (ret) {
 351                 case LIBUSB_ERROR_BUSY:
 352                         sr_err("Unable to claim USB interface. Another "
 353                                "program or driver has already claimed it.");
 354                         break;
 355                 case LIBUSB_ERROR_NO_DEVICE:
 356                         sr_err("Device has been disconnected.");
 357                         break;
 358                 default:
 359                         sr_err("Unable to claim interface: %s.",
 360                                libusb_error_name(ret));
 361                         break;
 362                 }
 363
 364                 return SR_ERR;
 365         }
 366
 367
 368         if ((ret = dslogic_fpga_firmware_upload(sdi)) != SR_OK)
 369                 return ret;
 370
 371         if (devc->cur_samplerate == 0) {
 372                 /* Samplerate hasn't been set; default to the slowest one. */
 373                 devc->cur_samplerate = devc->samplerates[0];
 374         }
 375
 376         if (devc->cur_threshold == 0.0)
 377                 devc->cur_threshold = 1.5;
 378
 379         return SR_OK;
 380 }
 381
 382 static int dev_close(struct sr_dev_inst *sdi)
 383 {
 384         struct sr_usb_dev_inst *usb;
 385
 386         usb = sdi->conn;
 387
 388         if (!usb->devhdl)
 389                 return SR_ERR;
 390
 391         sr_info("dslogic: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 392                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 393         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 394         libusb_close(usb->devhdl);
 395         usb->devhdl = NULL;
 396         sdi->status = SR_ST_INACTIVE;
 397
 398         return SR_OK;
 399 }
 400
 401 static int config_get(uint32_t key, GVariant **data,
 402         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 403 {
 404         struct dev_context *devc;
 405         struct sr_usb_dev_inst *usb;
 406         GVariant *range[2];
 407         unsigned int i, voltage_range;
 408         char str[128];
 409
 410         (void)cg;
 411
 412         if (!sdi)
 413                 return SR_ERR_ARG;
 414
 415         devc = sdi->priv;
 416
 417         switch (key) {
 418         case SR_CONF_CONN:
 419                 if (!sdi->conn)
 420                         return SR_ERR_ARG;
 421                 usb = sdi->conn;
 422                 if (usb->address == 255)
 423                         /* Device still needs to re-enumerate after firmware
 424                          * upload, so we don't know its (future) address. */
 425                         return SR_ERR;
 426                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 427                 *data = g_variant_new_string(str);
 428                 break;
 429         case SR_CONF_VOLTAGE_THRESHOLD:
 430                 if (!strcmp(devc->profile->model, "DSLogic")) {
 431                         voltage_range = 0;
 432
 433                         for (i = 0; i < ARRAY_SIZE(dslogic_voltage_thresholds); i++)
 434                                 if (dslogic_voltage_thresholds[i].low ==
 435                                         devc->cur_threshold) {
 436                                         voltage_range = i;
 437                                         break;
 438                                 }
 439
 440                         range[0] = g_variant_new_double(
 441                                 dslogic_voltage_thresholds[voltage_range].low);
 442                         range[1] = g_variant_new_double(
 443                                 dslogic_voltage_thresholds[voltage_range].high);
 444                 } else {
 445                         range[0] = g_variant_new_double(devc->cur_threshold);
 446                         range[1] = g_variant_new_double(devc->cur_threshold);
 447                 }
 448                 *data = g_variant_new_tuple(range, 2);
 449                 break;
 450         case SR_CONF_LIMIT_SAMPLES:
 451                 *data = g_variant_new_uint64(devc->limit_samples);
 452                 break;
 453         case SR_CONF_SAMPLERATE:
 454                 *data = g_variant_new_uint64(devc->cur_samplerate);
 455                 break;
 456         case SR_CONF_CAPTURE_RATIO:
 457                 *data = g_variant_new_uint64(devc->capture_ratio);
 458                 break;
 459         case SR_CONF_EXTERNAL_CLOCK:
 460                 *data = g_variant_new_boolean(devc->external_clock);
 461                 break;
 462         case SR_CONF_CONTINUOUS:
 463                 *data = g_variant_new_boolean(devc->continuous_mode);
 464                 break;
 465         case SR_CONF_CLOCK_EDGE:
 466                 i = devc->clock_edge;
 467                 if (i >= ARRAY_SIZE(signal_edge_names))
 468                         return SR_ERR_BUG;
 469                 *data = g_variant_new_string(signal_edge_names[0]);
 470                 break;
 471         default:
 472                 return SR_ERR_NA;
 473         }
 474
 475         return SR_OK;
 476 }
 477
 478 /*
 479  * Helper for mapping a string-typed configuration value to an index
 480  * within a table of possible values.
 481  */
 482 static int lookup_index(GVariant *value, const char *const *table, int len)
 483 {
 484         const char *entry;
 485         int i;
 486
 487         entry = g_variant_get_string(value, NULL);
 488         if (!entry)
 489                 return -1;
 490
 491         /* Linear search is fine for very small tables. */
 492         for (i = 0; i < len; i++) {
 493                 if (strcmp(entry, table[i]) == 0)
 494                         return i;
 495         }
 496
 497         return -1;
 498 }
 499
 500 static int config_set(uint32_t key, GVariant *data,
 501         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 502 {
 503         struct dev_context *devc;
 504         uint64_t arg;
 505         int i, ret;
 506         gdouble low, high;
 507
 508         (void)cg;
 509
 510         if (!sdi)
 511                 return SR_ERR_ARG;
 512
 513         if (sdi->status != SR_ST_ACTIVE)
 514                 return SR_ERR;
 515
 516         devc = sdi->priv;
 517
 518         ret = SR_OK;
 519
 520         switch (key) {
 521         case SR_CONF_SAMPLERATE:
 522                 arg = g_variant_get_uint64(data);
 523                 for (i = 0; i < devc->num_samplerates; i++) {
 524                         if (devc->samplerates[i] == arg) {
 525                                 devc->cur_samplerate = arg;
 526                                 break;
 527                         }
 528                 }
 529                 if (i == devc->num_samplerates)
 530                         ret = SR_ERR_ARG;
 531                 break;
 532         case SR_CONF_LIMIT_SAMPLES:
 533                 devc->limit_samples = g_variant_get_uint64(data);
 534                 break;
 535         case SR_CONF_CAPTURE_RATIO:
 536                 devc->capture_ratio = g_variant_get_uint64(data);
 537                 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
 538                 break;
 539         case SR_CONF_VOLTAGE_THRESHOLD:
 540                 g_variant_get(data, "(dd)", &low, &high);
 541                 if (!strcmp(devc->profile->model, "DSLogic")) {
 542                         for (i = 0; (unsigned int)i <
 543                                 ARRAY_SIZE(dslogic_voltage_thresholds); i++) {
 544                                 if (fabs(dslogic_voltage_thresholds[i].low - low) < 0.1 &&
 545                                     fabs(dslogic_voltage_thresholds[i].high - high) < 0.1) {
 546                                         devc->cur_threshold =
 547                                                 dslogic_voltage_thresholds[i].low;
 548                                         break;
 549                                 }
 550                         }
 551                         ret = dslogic_fpga_firmware_upload(sdi);
 552                 } else {
 553                         ret = dslogic_set_voltage_threshold(sdi, (low + high) / 2.0);
 554                 }
 555                 break;
 556         case SR_CONF_EXTERNAL_CLOCK:
 557                 devc->external_clock = g_variant_get_boolean(data);
 558                 break;
 559         case SR_CONF_CONTINUOUS:
 560                 devc->continuous_mode = g_variant_get_boolean(data);
 561                 break;
 562         case SR_CONF_CLOCK_EDGE:
 563                 i = lookup_index(data, signal_edge_names,
 564                                    ARRAY_SIZE(signal_edge_names));
 565                 if (i < 0)
 566                         return SR_ERR_ARG;
 567                 devc->clock_edge = i;
 568                 break;
 569         default:
 570                 ret = SR_ERR_NA;
 571         }
 572
 573         return ret;
 574 }
 575
 576 static int config_list(uint32_t key, GVariant **data,
 577         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 578 {
 579         struct dev_context *devc = NULL;
 580         GVariant *gvar, *range[2];
 581         GVariantBuilder gvb;
 582         unsigned int i;
 583         double v;
 584
 585         (void)cg;
 586
 587         switch (key) {
 588         case SR_CONF_SCAN_OPTIONS:
 589                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 590                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 591                 break;
 592         case SR_CONF_DEVICE_OPTIONS:
 593                 if (!sdi) {
 594                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 595                                 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 596                 } else {
 597                         devc = sdi->priv;
 598                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 599                                                           devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 600                 }
 601                 break;
 602         case SR_CONF_VOLTAGE_THRESHOLD:
 603                 if (sdi->priv)
 604                         devc = sdi->priv;
 605                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 606                 if (devc && !strcmp(devc->profile->model, "DSLogic")) {
 607                         for (i = 0; i < ARRAY_SIZE(dslogic_voltage_thresholds); i++) {
 608                                 range[0] = g_variant_new_double(dslogic_voltage_thresholds[i].low);
 609                                 range[1] = g_variant_new_double(dslogic_voltage_thresholds[i].high);
 610                                 gvar = g_variant_new_tuple(range, 2);
 611                                 g_variant_builder_add_value(&gvb, gvar);
 612                         }
 613                 } else {
 614                         for (v = 0.0; v <= 5.0; v += 0.1) {
 615                                 range[0] = g_variant_new_double(v);
 616                                 range[1] = g_variant_new_double(v);
 617                                 gvar = g_variant_new_tuple(range, 2);
 618                                 g_variant_builder_add_value(&gvb, gvar);
 619                         }
 620                 }
 621                 *data = g_variant_builder_end(&gvb);
 622                 break;
 623         case SR_CONF_SAMPLERATE:
 624                 devc = sdi->priv;
 625                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 626                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), devc->samplerates,
 627                                 devc->num_samplerates, sizeof(uint64_t));
 628                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 629                 *data = g_variant_builder_end(&gvb);
 630                 break;
 631         case SR_CONF_CLOCK_EDGE:
 632                 *data = g_variant_new_strv(signal_edge_names,
 633                         ARRAY_SIZE(signal_edge_names));
 634                 break;
 635         default:
 636                 return SR_ERR_NA;
 637         }
 638
 639         return SR_OK;
 640 }
 641
 642 static int receive_data(int fd, int revents, void *cb_data)
 643 {
 644         struct timeval tv;
 645         struct drv_context *drvc;
 646
 647         (void)fd;
 648         (void)revents;
 649
 650         drvc = (struct drv_context *)cb_data;
 651
 652         tv.tv_sec = tv.tv_usec = 0;
 653         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 654
 655         return TRUE;
 656 }
 657
 658 static int start_transfers(const struct sr_dev_inst *sdi)
 659 {
 660         struct dev_context *devc;
 661         struct sr_usb_dev_inst *usb;
 662         struct libusb_transfer *transfer;
 663         unsigned int i, num_transfers;
 664         int timeout, ret;
 665         unsigned char *buf;
 666         size_t size;
 667
 668         devc = sdi->priv;
 669         usb = sdi->conn;
 670
 671         devc->sent_samples = 0;
 672         devc->acq_aborted = FALSE;
 673         devc->empty_transfer_count = 0;
 674         devc->trigger_fired = TRUE;
 675
 676         num_transfers = dslogic_get_number_of_transfers(devc);
 677
 678         if (devc->cur_samplerate == SR_MHZ(100))
 679                 num_transfers = 16;
 680         else if (devc->cur_samplerate == SR_MHZ(200))
 681                 num_transfers = 8;
 682         else if (devc->cur_samplerate == SR_MHZ(400))
 683                 num_transfers = 4;
 684
 685         size = dslogic_get_buffer_size(devc);
 686         devc->submitted_transfers = 0;
 687
 688         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 689         if (!devc->transfers) {
 690                 sr_err("USB transfers malloc failed.");
 691                 return SR_ERR_MALLOC;
 692         }
 693
 694         timeout = dslogic_get_timeout(devc);
 695         devc->num_transfers = num_transfers;
 696         for (i = 0; i < num_transfers; i++) {
 697                 if (!(buf = g_try_malloc(size))) {
 698                         sr_err("USB transfer buffer malloc failed.");
 699                         return SR_ERR_MALLOC;
 700                 }
 701                 transfer = libusb_alloc_transfer(0);
 702                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 703                                 6 | LIBUSB_ENDPOINT_IN, buf, size,
 704                                 dslogic_receive_transfer, (void *)sdi, timeout);
 705                 sr_info("submitting transfer: %d", i);
 706                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 707                         sr_err("Failed to submit transfer: %s.",
 708                                libusb_error_name(ret));
 709                         libusb_free_transfer(transfer);
 710                         g_free(buf);
 711                         dslogic_abort_acquisition(devc);
 712                         return SR_ERR;
 713                 }
 714                 devc->transfers[i] = transfer;
 715                 devc->submitted_transfers++;
 716         }
 717
 718         std_session_send_df_header(sdi);
 719
 720         return SR_OK;
 721 }
 722
 723 static void LIBUSB_CALL trigger_receive(struct libusb_transfer *transfer)
 724 {
 725         const struct sr_dev_inst *sdi;
 726         struct dslogic_trigger_pos *tpos;
 727         struct dev_context *devc;
 728
 729         sdi = transfer->user_data;
 730         devc = sdi->priv;
 731         if (transfer->status == LIBUSB_TRANSFER_CANCELLED) {
 732                 sr_dbg("Trigger transfer canceled.");
 733                 /* Terminate session. */
 734                 std_session_send_df_end(sdi);
 735                 usb_source_remove(sdi->session, devc->ctx);
 736                 devc->num_transfers = 0;
 737                 g_free(devc->transfers);
 738         } else if (transfer->status == LIBUSB_TRANSFER_COMPLETED
 739                         && transfer->actual_length == sizeof(struct dslogic_trigger_pos)) {
 740                 tpos = (struct dslogic_trigger_pos *)transfer->buffer;
 741                 sr_info("tpos real_pos %d ram_saddr %d cnt %d", tpos->real_pos,
 742                         tpos->ram_saddr, tpos->remain_cnt);
 743                 devc->trigger_pos = tpos->real_pos;
 744                 g_free(tpos);
 745                 start_transfers(sdi);
 746         }
 747         libusb_free_transfer(transfer);
 748 }
 749
 750 static int trigger_request(const struct sr_dev_inst *sdi)
 751 {
 752         struct sr_usb_dev_inst *usb;
 753         struct libusb_transfer *transfer;
 754         struct dslogic_trigger_pos *tpos;
 755         struct dev_context *devc;
 756         int ret;
 757
 758         usb = sdi->conn;
 759         devc = sdi->priv;
 760
 761         if ((ret = dslogic_stop_acquisition(sdi)) != SR_OK)
 762                 return ret;
 763
 764         if ((ret = dslogic_fpga_configure(sdi)) != SR_OK)
 765                 return ret;
 766
 767         if ((ret = dslogic_start_acquisition(sdi)) != SR_OK)
 768                 return ret;
 769
 770         sr_dbg("Getting trigger.");
 771         tpos = g_malloc(sizeof(struct dslogic_trigger_pos));
 772         transfer = libusb_alloc_transfer(0);
 773         libusb_fill_bulk_transfer(transfer, usb->devhdl, 6 | LIBUSB_ENDPOINT_IN,
 774                         (unsigned char *)tpos, sizeof(struct dslogic_trigger_pos),
 775                         trigger_receive, (void *)sdi, 0);
 776         if ((ret = libusb_submit_transfer(transfer)) < 0) {
 777                 sr_err("Failed to request trigger: %s.", libusb_error_name(ret));
 778                 libusb_free_transfer(transfer);
 779                 g_free(tpos);
 780                 return SR_ERR;
 781         }
 782
 783         devc->transfers = g_try_malloc0(sizeof(*devc->transfers));
 784         if (!devc->transfers) {
 785                 sr_err("USB trigger_pos transfer malloc failed.");
 786                 return SR_ERR_MALLOC;
 787         }
 788         devc->num_transfers = 1;
 789         devc->submitted_transfers++;
 790         devc->transfers[0] = transfer;
 791
 792         return ret;
 793 }
 794
 795 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 796 {
 797         struct sr_dev_driver *di;
 798         struct drv_context *drvc;
 799         struct dev_context *devc;
 800         int timeout;
 801
 802         if (sdi->status != SR_ST_ACTIVE)
 803                 return SR_ERR_DEV_CLOSED;
 804
 805         di = sdi->driver;
 806         drvc = di->context;
 807         devc = sdi->priv;
 808
 809         devc->ctx = drvc->sr_ctx;
 810         devc->sent_samples = 0;
 811         devc->empty_transfer_count = 0;
 812         devc->acq_aborted = FALSE;
 813
 814         timeout = dslogic_get_timeout(devc);
 815         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, drvc);
 816
 817         trigger_request(sdi);
 818
 819         return SR_OK;
 820 }
 821
 822 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 823 {
 824         dslogic_stop_acquisition(sdi);
 825
 826         dslogic_abort_acquisition(sdi->priv);
 827
 828         return SR_OK;
 829 }
 830
 831 static struct sr_dev_driver dslogic_driver_info = {
 832         .name = "dslogic",
 833         .longname = "DreamSourceLabs DSLogic",
 834         .api_version = 1,
 835         .init = std_init,
 836         .cleanup = std_cleanup,
 837         .scan = scan,
 838         .dev_list = std_dev_list,
 839         .dev_clear = dev_clear,
 840         .config_get = config_get,
 841         .config_set = config_set,
 842         .config_list = config_list,
 843         .dev_open = dev_open,
 844         .dev_close = dev_close,
 845         .dev_acquisition_start = dev_acquisition_start,
 846         .dev_acquisition_stop = dev_acquisition_stop,
 847         .context = NULL,
 848 };
 849 SR_REGISTER_DEV_DRIVER(dslogic_driver_info);