src/hardware/fx2lafw/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 "protocol.h"
  22
  23 static const struct fx2lafw_profile supported_fx2[] = {
  24         /*
  25          * CWAV USBee AX
  26          * EE Electronics ESLA201A
  27          * ARMFLY AX-Pro
  28          */
  29         { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL,
  30                 FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw",
  31                 0, NULL, NULL},
  32         /*
  33          * CWAV USBee DX
  34          * XZL-Studio DX
  35          */
  36         { 0x08a9, 0x0015, "CWAV", "USBee DX", NULL,
  37                 FIRMWARE_DIR "/fx2lafw-cwav-usbeedx.fw",
  38                 DEV_CAPS_16BIT, NULL, NULL },
  39
  40         /*
  41          * CWAV USBee SX
  42          */
  43         { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL,
  44                 FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw",
  45                 0, NULL, NULL},
  46
  47         /*
  48          * DreamSourceLab DSLogic (before FW upload)
  49          */
  50         { 0x2a0e, 0x0001, "DreamSourceLab", "DSLogic", NULL,
  51                 FIRMWARE_DIR "/dreamsourcelab-dslogic-fx2.fw",
  52                 DEV_CAPS_16BIT, NULL, NULL},
  53
  54         /*
  55          * DreamSourceLab DSLogic (after FW upload)
  56          */
  57         { 0x2a0e, 0x0001, "DreamSourceLab", "DSLogic", NULL,
  58                 FIRMWARE_DIR "/dreamsourcelab-dslogic-fx2.fw",
  59                 DEV_CAPS_16BIT, "DreamSourceLab", "DSLogic"},
  60
  61         /*
  62          * Saleae Logic
  63          * EE Electronics ESLA100
  64          * Robomotic MiniLogic
  65          * Robomotic BugLogic 3
  66          */
  67         { 0x0925, 0x3881, "Saleae", "Logic", NULL,
  68                 FIRMWARE_DIR "/fx2lafw-saleae-logic.fw",
  69                 0, NULL, NULL},
  70
  71         /*
  72          * Default Cypress FX2 without EEPROM, e.g.:
  73          * Lcsoft Mini Board
  74          * Braintechnology USB Interface V2.x
  75          */
  76         { 0x04B4, 0x8613, "Cypress", "FX2", NULL,
  77                 FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw",
  78                 DEV_CAPS_16BIT, NULL, NULL },
  79
  80         /*
  81          * Braintechnology USB-LPS
  82          */
  83         { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL,
  84                 FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw",
  85                 DEV_CAPS_16BIT, NULL, NULL },
  86
  87         { 0, 0, 0, 0, 0, 0, 0, 0, 0 }
  88 };
  89
  90 static const uint32_t drvopts[] = {
  91         SR_CONF_LOGIC_ANALYZER,
  92 };
  93
  94 static const uint32_t scanopts[] = {
  95         SR_CONF_CONN,
  96 };
  97
  98 static const uint32_t devopts[] = {
  99         SR_CONF_CONTINUOUS | SR_CONF_SET,
 100         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
 101         SR_CONF_CONN | SR_CONF_GET,
 102         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 103         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
 104         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
 105 };
 106
 107 static const char *channel_names[] = {
 108         "0",  "1",  "2",  "3",  "4",  "5",  "6",  "7",
 109         "8",  "9", "10", "11", "12", "13", "14", "15",
 110         NULL,
 111 };
 112
 113 static const int32_t soft_trigger_matches[] = {
 114         SR_TRIGGER_ZERO,
 115         SR_TRIGGER_ONE,
 116         SR_TRIGGER_RISING,
 117         SR_TRIGGER_FALLING,
 118         SR_TRIGGER_EDGE,
 119 };
 120
 121 static const uint64_t samplerates[] = {
 122         SR_KHZ(20),
 123         SR_KHZ(25),
 124         SR_KHZ(50),
 125         SR_KHZ(100),
 126         SR_KHZ(200),
 127         SR_KHZ(250),
 128         SR_KHZ(500),
 129         SR_MHZ(1),
 130         SR_MHZ(2),
 131         SR_MHZ(3),
 132         SR_MHZ(4),
 133         SR_MHZ(6),
 134         SR_MHZ(8),
 135         SR_MHZ(12),
 136         SR_MHZ(16),
 137         SR_MHZ(24),
 138 };
 139
 140 static const uint64_t dslogic_samplerates[] = {
 141         SR_KHZ(10),
 142         SR_KHZ(20),
 143         SR_KHZ(50),
 144         SR_KHZ(100),
 145         SR_KHZ(200),
 146         SR_KHZ(500),
 147         SR_MHZ(1),
 148         SR_MHZ(2),
 149         SR_MHZ(5),
 150         SR_MHZ(10),
 151         SR_MHZ(20),
 152         SR_MHZ(25),
 153         SR_MHZ(50),
 154         SR_MHZ(100),
 155         SR_MHZ(200),
 156         SR_MHZ(400),
 157 };
 158
 159 SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
 160 static struct sr_dev_driver *di = &fx2lafw_driver_info;
 161
 162 static int init(struct sr_context *sr_ctx)
 163 {
 164         return std_init(sr_ctx, di, LOG_PREFIX);
 165 }
 166
 167 static GSList *scan(GSList *options)
 168 {
 169         struct drv_context *drvc;
 170         struct dev_context *devc;
 171         struct sr_dev_inst *sdi;
 172         struct sr_usb_dev_inst *usb;
 173         struct sr_channel *ch;
 174         struct sr_config *src;
 175         const struct fx2lafw_profile *prof;
 176         GSList *l, *devices, *conn_devices;
 177         gboolean has_firmware;
 178         struct libusb_device_descriptor des;
 179         libusb_device **devlist;
 180         struct libusb_device_handle *hdl;
 181         int num_logic_channels, ret, i, j;
 182         const char *conn;
 183         char manufacturer[64], product[64], serial_num[64], connection_id[64];
 184
 185         drvc = di->priv;
 186
 187         conn = NULL;
 188         for (l = options; l; l = l->next) {
 189                 src = l->data;
 190                 switch (src->key) {
 191                 case SR_CONF_CONN:
 192                         conn = g_variant_get_string(src->data, NULL);
 193                         break;
 194                 }
 195         }
 196         if (conn)
 197                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 198         else
 199                 conn_devices = NULL;
 200
 201         /* Find all fx2lafw compatible devices and upload firmware to them. */
 202         devices = NULL;
 203         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 204         for (i = 0; devlist[i]; i++) {
 205                 if (conn) {
 206                         usb = NULL;
 207                         for (l = conn_devices; l; l = l->next) {
 208                                 usb = l->data;
 209                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 210                                         && usb->address == libusb_get_device_address(devlist[i]))
 211                                         break;
 212                         }
 213                         if (!l)
 214                                 /* This device matched none of the ones that
 215                                  * matched the conn specification. */
 216                                 continue;
 217                 }
 218
 219                 if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) {
 220                         sr_warn("Failed to get device descriptor: %s.",
 221                                 libusb_error_name(ret));
 222                         continue;
 223                 }
 224
 225                 if ((ret = libusb_open(devlist[i], &hdl)) < 0)
 226                         continue;
 227
 228                 if (des.iManufacturer == 0) {
 229                         manufacturer[0] = '\0';
 230                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 231                                 des.iManufacturer, (unsigned char *) manufacturer,
 232                                 sizeof(manufacturer))) < 0) {
 233                         sr_warn("Failed to get manufacturer string descriptor: %s.",
 234                                 libusb_error_name(ret));
 235                         continue;
 236                 }
 237
 238                 if (des.iProduct == 0) {
 239                         product[0] = '\0';
 240                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 241                                 des.iProduct, (unsigned char *) product,
 242                                 sizeof(product))) < 0) {
 243                         sr_warn("Failed to get product string descriptor: %s.",
 244                                 libusb_error_name(ret));
 245                         continue;
 246                 }
 247
 248                 if (des.iSerialNumber == 0) {
 249                         serial_num[0] = '\0';
 250                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 251                                 des.iSerialNumber, (unsigned char *) serial_num,
 252                                 sizeof(serial_num))) < 0) {
 253                         sr_warn("Failed to get serial number string descriptor: %s.",
 254                                 libusb_error_name(ret));
 255                         continue;
 256                 }
 257
 258                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 259
 260                 libusb_close(hdl);
 261
 262                 prof = NULL;
 263                 for (j = 0; supported_fx2[j].vid; j++) {
 264                         if (des.idVendor == supported_fx2[j].vid &&
 265                                         des.idProduct == supported_fx2[j].pid &&
 266                                         (!supported_fx2[j].usb_manufacturer ||
 267                                          !strcmp(manufacturer, supported_fx2[j].usb_manufacturer)) &&
 268                                         (!supported_fx2[j].usb_manufacturer ||
 269                                          !strcmp(product, supported_fx2[j].usb_product))) {
 270                                 prof = &supported_fx2[j];
 271                                 break;
 272                         }
 273                 }
 274
 275                 /* Skip if the device was not found. */
 276                 if (!prof)
 277                         continue;
 278
 279                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 280                 sdi->status = SR_ST_INITIALIZING;
 281                 sdi->vendor = g_strdup(prof->vendor);
 282                 sdi->model = g_strdup(prof->model);
 283                 sdi->version = g_strdup(prof->model_version);
 284                 sdi->driver = di;
 285                 sdi->serial_num = g_strdup(serial_num);
 286                 sdi->connection_id = g_strdup(connection_id);
 287
 288                 /* Fill in channellist according to this device's profile. */
 289                 num_logic_channels = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
 290                 for (j = 0; j < num_logic_channels; j++) {
 291                         ch = sr_channel_new(j, SR_CHANNEL_LOGIC, TRUE,
 292                                         channel_names[j]);
 293                         sdi->channels = g_slist_append(sdi->channels, ch);
 294                 }
 295
 296                 devc = fx2lafw_dev_new();
 297                 devc->profile = prof;
 298                 devc->sample_wide = (prof->dev_caps & DEV_CAPS_16BIT) != 0;
 299                 sdi->priv = devc;
 300                 drvc->instances = g_slist_append(drvc->instances, sdi);
 301                 devices = g_slist_append(devices, sdi);
 302
 303                 if (strcmp(prof->model, "DSLogic")) {
 304                         devc->dslogic = FALSE;
 305                         devc->samplerates = samplerates;
 306                         devc->num_samplerates = ARRAY_SIZE(samplerates);
 307                         has_firmware = match_manuf_prod(devlist[i],
 308                                         "sigrok", "fx2lafw");
 309                 } else {
 310                         devc->dslogic = TRUE;
 311                         devc->samplerates = dslogic_samplerates;
 312                         devc->num_samplerates = ARRAY_SIZE(dslogic_samplerates);
 313                         has_firmware = match_manuf_prod(devlist[i],
 314                                         "DreamSourceLab", "DSLogic");
 315                 }
 316
 317                 if (has_firmware) {
 318                         /* Already has the firmware, so fix the new address. */
 319                         sr_dbg("Found an fx2lafw device.");
 320                         sdi->status = SR_ST_INACTIVE;
 321                         sdi->inst_type = SR_INST_USB;
 322                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 323                                         libusb_get_device_address(devlist[i]), NULL);
 324                 } else {
 325                         if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 326                                 prof->firmware) == SR_OK)
 327                                 /* Store when this device's FW was updated. */
 328                                 devc->fw_updated = g_get_monotonic_time();
 329                         else
 330                                 sr_err("Firmware upload failed for "
 331                                        "device %d.%d (logical).",
 332                                        libusb_get_bus_number(devlist[i]),
 333                                        libusb_get_device_address(devlist[i]));
 334                         sdi->inst_type = SR_INST_USB;
 335                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 336                                         0xff, NULL);
 337                 }
 338         }
 339         libusb_free_device_list(devlist, 1);
 340         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 341
 342         return devices;
 343 }
 344
 345 static GSList *dev_list(void)
 346 {
 347         return ((struct drv_context *)(di->priv))->instances;
 348 }
 349
 350 static int dev_open(struct sr_dev_inst *sdi)
 351 {
 352         struct sr_usb_dev_inst *usb;
 353         struct dev_context *devc;
 354         int ret;
 355         int64_t timediff_us, timediff_ms;
 356
 357         devc = sdi->priv;
 358         usb = sdi->conn;
 359
 360         /*
 361          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 362          * milliseconds for the FX2 to renumerate.
 363          */
 364         ret = SR_ERR;
 365         if (devc->fw_updated > 0) {
 366                 sr_info("Waiting for device to reset.");
 367                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 368                 g_usleep(300 * 1000);
 369                 timediff_ms = 0;
 370                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 371                         if ((ret = fx2lafw_dev_open(sdi, di)) == SR_OK)
 372                                 break;
 373                         g_usleep(100 * 1000);
 374
 375                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 376                         timediff_ms = timediff_us / 1000;
 377                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 378                 }
 379                 if (ret != SR_OK) {
 380                         sr_err("Device failed to renumerate.");
 381                         return SR_ERR;
 382                 }
 383                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 384         } else {
 385                 sr_info("Firmware upload was not needed.");
 386                 ret = fx2lafw_dev_open(sdi, di);
 387         }
 388
 389         if (ret != SR_OK) {
 390                 sr_err("Unable to open device.");
 391                 return SR_ERR;
 392         }
 393
 394         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 395         if (ret != 0) {
 396                 switch (ret) {
 397                 case LIBUSB_ERROR_BUSY:
 398                         sr_err("Unable to claim USB interface. Another "
 399                                "program or driver has already claimed it.");
 400                         break;
 401                 case LIBUSB_ERROR_NO_DEVICE:
 402                         sr_err("Device has been disconnected.");
 403                         break;
 404                 default:
 405                         sr_err("Unable to claim interface: %s.",
 406                                libusb_error_name(ret));
 407                         break;
 408                 }
 409
 410                 return SR_ERR;
 411         }
 412
 413         if (devc->dslogic) {
 414                 if ((ret = dslogic_fpga_firmware_upload(usb->devhdl,
 415                                 DSLOGIC_FPGA_FIRMWARE)) != SR_OK)
 416                         return ret;
 417         }
 418
 419         if (devc->cur_samplerate == 0) {
 420                 /* Samplerate hasn't been set; default to the slowest one. */
 421                 devc->cur_samplerate = devc->samplerates[0];
 422         }
 423
 424         return SR_OK;
 425 }
 426
 427 static int dev_close(struct sr_dev_inst *sdi)
 428 {
 429         struct sr_usb_dev_inst *usb;
 430
 431         usb = sdi->conn;
 432         if (usb->devhdl == NULL)
 433                 return SR_ERR;
 434
 435         sr_info("fx2lafw: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 436                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 437         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 438         libusb_close(usb->devhdl);
 439         usb->devhdl = NULL;
 440         sdi->status = SR_ST_INACTIVE;
 441
 442         return SR_OK;
 443 }
 444
 445 static int cleanup(void)
 446 {
 447         int ret;
 448         struct drv_context *drvc;
 449
 450         if (!(drvc = di->priv))
 451                 return SR_OK;
 452
 453         ret = std_dev_clear(di, NULL);
 454
 455         g_free(drvc);
 456         di->priv = NULL;
 457
 458         return ret;
 459 }
 460
 461 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 462                 const struct sr_channel_group *cg)
 463 {
 464         struct dev_context *devc;
 465         struct sr_usb_dev_inst *usb;
 466         char str[128];
 467
 468         (void)cg;
 469
 470         if (!sdi)
 471                 return SR_ERR_ARG;
 472
 473         devc = sdi->priv;
 474
 475         switch (key) {
 476         case SR_CONF_CONN:
 477                 if (!sdi->conn)
 478                         return SR_ERR_ARG;
 479                 usb = sdi->conn;
 480                 if (usb->address == 255)
 481                         /* Device still needs to re-enumerate after firmware
 482                          * upload, so we don't know its (future) address. */
 483                         return SR_ERR;
 484                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 485                 *data = g_variant_new_string(str);
 486                 break;
 487         case SR_CONF_LIMIT_SAMPLES:
 488                 *data = g_variant_new_uint64(devc->limit_samples);
 489                 break;
 490         case SR_CONF_SAMPLERATE:
 491                 *data = g_variant_new_uint64(devc->cur_samplerate);
 492                 break;
 493         case SR_CONF_CAPTURE_RATIO:
 494                 *data = g_variant_new_uint64(devc->capture_ratio);
 495                 break;
 496         default:
 497                 return SR_ERR_NA;
 498         }
 499
 500         return SR_OK;
 501 }
 502
 503 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 504                 const struct sr_channel_group *cg)
 505 {
 506         struct dev_context *devc;
 507         uint64_t arg;
 508         unsigned int i;
 509         int ret;
 510
 511         (void)cg;
 512
 513         if (!sdi)
 514                 return SR_ERR_ARG;
 515
 516         if (sdi->status != SR_ST_ACTIVE)
 517                 return SR_ERR;
 518
 519         devc = sdi->priv;
 520
 521         ret = SR_OK;
 522
 523         switch (key) {
 524                 case SR_CONF_SAMPLERATE:
 525                         arg = g_variant_get_uint64(data);
 526                         for (i = 0; i < ARRAY_SIZE(samplerates); i++) {
 527                                 if (samplerates[i] == arg) {
 528                                         devc->cur_samplerate = arg;
 529                                         break;
 530                                 }
 531                         }
 532                         if (i == ARRAY_SIZE(samplerates))
 533                                 ret = SR_ERR_ARG;
 534                         break;
 535                 case SR_CONF_LIMIT_SAMPLES:
 536                         devc->limit_samples = g_variant_get_uint64(data);
 537                         break;
 538                 case SR_CONF_CAPTURE_RATIO:
 539                         devc->capture_ratio = g_variant_get_uint64(data);
 540                         if (devc->capture_ratio > 100) {
 541                                 devc->capture_ratio = 0;
 542                                 ret = SR_ERR;
 543                         } else
 544                                 ret = SR_OK;
 545                         break;
 546                 default:
 547                         ret = SR_ERR_NA;
 548         }
 549
 550         return ret;
 551 }
 552
 553 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 554                 const struct sr_channel_group *cg)
 555 {
 556         struct dev_context *devc;
 557         GVariant *gvar;
 558         GVariantBuilder gvb;
 559
 560         (void)cg;
 561
 562         switch (key) {
 563         case SR_CONF_SCAN_OPTIONS:
 564                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 565                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 566                 break;
 567         case SR_CONF_DEVICE_OPTIONS:
 568                 if (!sdi)
 569                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 570                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 571                 else
 572                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 573                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 574                 break;
 575         case SR_CONF_SAMPLERATE:
 576                 if (!sdi->priv)
 577                         return SR_ERR_ARG;
 578                 devc = sdi->priv;
 579                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 580                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), devc->samplerates,
 581                                 devc->num_samplerates, sizeof(uint64_t));
 582                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 583                 *data = g_variant_builder_end(&gvb);
 584                 break;
 585         case SR_CONF_TRIGGER_MATCH:
 586                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 587                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 588                                 sizeof(int32_t));
 589                 break;
 590         default:
 591                 return SR_ERR_NA;
 592         }
 593
 594         return SR_OK;
 595 }
 596
 597 static int receive_data(int fd, int revents, void *cb_data)
 598 {
 599         struct timeval tv;
 600         struct drv_context *drvc;
 601
 602         (void)fd;
 603         (void)revents;
 604         (void)cb_data;
 605
 606         drvc = di->priv;
 607
 608         tv.tv_sec = tv.tv_usec = 0;
 609         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 610
 611         return TRUE;
 612 }
 613
 614 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 615 {
 616         struct dev_context *devc;
 617         struct drv_context *drvc;
 618         struct sr_usb_dev_inst *usb;
 619         struct sr_trigger *trigger;
 620         struct libusb_transfer *transfer;
 621         unsigned int i, timeout, num_transfers;
 622         int ret;
 623         unsigned char *buf;
 624         size_t size;
 625
 626         if (sdi->status != SR_ST_ACTIVE)
 627                 return SR_ERR_DEV_CLOSED;
 628
 629         drvc = di->priv;
 630         devc = sdi->priv;
 631         usb = sdi->conn;
 632
 633         devc->cb_data = cb_data;
 634         devc->sent_samples = 0;
 635         devc->acq_aborted = FALSE;
 636         devc->empty_transfer_count = 0;
 637
 638         if ((trigger = sr_session_trigger_get(sdi->session))) {
 639                 int pre_trigger_samples = 0;
 640                 if (devc->limit_samples > 0)
 641                         pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
 642                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 643                 if (devc->stl == NULL)
 644                         return SR_ERR_MALLOC;
 645                 devc->trigger_fired = FALSE;
 646         } else
 647                 devc->trigger_fired = TRUE;
 648
 649         timeout = fx2lafw_get_timeout(devc);
 650         num_transfers = fx2lafw_get_number_of_transfers(devc);
 651         size = fx2lafw_get_buffer_size(devc);
 652         devc->submitted_transfers = 0;
 653
 654         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 655         if (!devc->transfers) {
 656                 sr_err("USB transfers malloc failed.");
 657                 return SR_ERR_MALLOC;
 658         }
 659
 660         devc->num_transfers = num_transfers;
 661         for (i = 0; i < num_transfers; i++) {
 662                 if (!(buf = g_try_malloc(size))) {
 663                         sr_err("USB transfer buffer malloc failed.");
 664                         return SR_ERR_MALLOC;
 665                 }
 666                 transfer = libusb_alloc_transfer(0);
 667                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 668                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 669                                 fx2lafw_receive_transfer, (void *)sdi, timeout);
 670                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 671                         sr_err("Failed to submit transfer: %s.",
 672                                libusb_error_name(ret));
 673                         libusb_free_transfer(transfer);
 674                         g_free(buf);
 675                         fx2lafw_abort_acquisition(devc);
 676                         return SR_ERR;
 677                 }
 678                 devc->transfers[i] = transfer;
 679                 devc->submitted_transfers++;
 680         }
 681
 682         devc->ctx = drvc->sr_ctx;
 683
 684         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, NULL);
 685
 686         /* Send header packet to the session bus. */
 687         std_session_send_df_header(cb_data, LOG_PREFIX);
 688
 689         if ((ret = fx2lafw_command_start_acquisition(sdi)) != SR_OK) {
 690                 fx2lafw_abort_acquisition(devc);
 691                 return ret;
 692         }
 693
 694         return SR_OK;
 695 }
 696
 697 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 698 {
 699         (void)cb_data;
 700
 701         fx2lafw_abort_acquisition(sdi->priv);
 702
 703         return SR_OK;
 704 }
 705
 706 SR_PRIV struct sr_dev_driver fx2lafw_driver_info = {
 707         .name = "fx2lafw",
 708         .longname = "fx2lafw (generic driver for FX2 based LAs)",
 709         .api_version = 1,
 710         .init = init,
 711         .cleanup = cleanup,
 712         .scan = scan,
 713         .dev_list = dev_list,
 714         .dev_clear = NULL,
 715         .config_get = config_get,
 716         .config_set = config_set,
 717         .config_list = config_list,
 718         .dev_open = dev_open,
 719         .dev_close = dev_close,
 720         .dev_acquisition_start = dev_acquisition_start,
 721         .dev_acquisition_stop = dev_acquisition_stop,
 722         .priv = NULL,
 723 };