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 #include "dslogic.h"
  23
  24 static const struct fx2lafw_profile supported_fx2[] = {
  25         /*
  26          * CWAV USBee AX
  27          * EE Electronics ESLA201A
  28          * ARMFLY AX-Pro
  29          */
  30         { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL,
  31                 FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw",
  32                 0, NULL, NULL},
  33         /*
  34          * CWAV USBee DX
  35          * XZL-Studio DX
  36          */
  37         { 0x08a9, 0x0015, "CWAV", "USBee DX", NULL,
  38                 FIRMWARE_DIR "/fx2lafw-cwav-usbeedx.fw",
  39                 DEV_CAPS_16BIT, NULL, NULL },
  40
  41         /*
  42          * CWAV USBee SX
  43          */
  44         { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL,
  45                 FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw",
  46                 0, NULL, NULL},
  47
  48         /*
  49          * DreamSourceLab DSLogic (before FW upload)
  50          */
  51         { 0x2a0e, 0x0001, "DreamSourceLab", "DSLogic", NULL,
  52                 FIRMWARE_DIR "/dreamsourcelab-dslogic-fx2.fw",
  53                 DEV_CAPS_16BIT, NULL, NULL},
  54
  55         /*
  56          * DreamSourceLab DSLogic (after FW upload)
  57          */
  58         { 0x2a0e, 0x0001, "DreamSourceLab", "DSLogic", NULL,
  59                 FIRMWARE_DIR "/dreamsourcelab-dslogic-fx2.fw",
  60                 DEV_CAPS_16BIT, "DreamSourceLab", "DSLogic"},
  61
  62         /*
  63          * Saleae Logic
  64          * EE Electronics ESLA100
  65          * Robomotic MiniLogic
  66          * Robomotic BugLogic 3
  67          */
  68         { 0x0925, 0x3881, "Saleae", "Logic", NULL,
  69                 FIRMWARE_DIR "/fx2lafw-saleae-logic.fw",
  70                 0, NULL, NULL},
  71
  72         /*
  73          * Default Cypress FX2 without EEPROM, e.g.:
  74          * Lcsoft Mini Board
  75          * Braintechnology USB Interface V2.x
  76          */
  77         { 0x04B4, 0x8613, "Cypress", "FX2", NULL,
  78                 FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw",
  79                 DEV_CAPS_16BIT, NULL, NULL },
  80
  81         /*
  82          * Braintechnology USB-LPS
  83          */
  84         { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL,
  85                 FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw",
  86                 DEV_CAPS_16BIT, NULL, NULL },
  87
  88         { 0, 0, 0, 0, 0, 0, 0, 0, 0 }
  89 };
  90
  91 static const uint32_t drvopts[] = {
  92         SR_CONF_LOGIC_ANALYZER,
  93 };
  94
  95 static const uint32_t scanopts[] = {
  96         SR_CONF_CONN,
  97 };
  98
  99 static const uint32_t devopts[] = {
 100         SR_CONF_CONTINUOUS | SR_CONF_SET,
 101         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
 102         SR_CONF_CONN | SR_CONF_GET,
 103         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 104         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
 105         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
 106 };
 107
 108 static const char *channel_names[] = {
 109         "0", "1", "2", "3", "4", "5", "6", "7",
 110         "8", "9", "10", "11", "12", "13", "14", "15",
 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
 161 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
 162 {
 163         return std_init(sr_ctx, di, LOG_PREFIX);
 164 }
 165
 166 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 167 {
 168         struct drv_context *drvc;
 169         struct dev_context *devc;
 170         struct sr_dev_inst *sdi;
 171         struct sr_usb_dev_inst *usb;
 172         struct sr_config *src;
 173         const struct fx2lafw_profile *prof;
 174         GSList *l, *devices, *conn_devices;
 175         gboolean has_firmware;
 176         struct libusb_device_descriptor des;
 177         libusb_device **devlist;
 178         struct libusb_device_handle *hdl;
 179         int num_logic_channels, ret, i, j;
 180         const char *conn;
 181         char manufacturer[64], product[64], serial_num[64], connection_id[64];
 182
 183         drvc = di->priv;
 184
 185         conn = NULL;
 186         for (l = options; l; l = l->next) {
 187                 src = l->data;
 188                 switch (src->key) {
 189                 case SR_CONF_CONN:
 190                         conn = g_variant_get_string(src->data, NULL);
 191                         break;
 192                 }
 193         }
 194         if (conn)
 195                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 196         else
 197                 conn_devices = NULL;
 198
 199         /* Find all fx2lafw compatible devices and upload firmware to them. */
 200         devices = NULL;
 201         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 202         for (i = 0; devlist[i]; i++) {
 203                 if (conn) {
 204                         usb = NULL;
 205                         for (l = conn_devices; l; l = l->next) {
 206                                 usb = l->data;
 207                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 208                                         && usb->address == libusb_get_device_address(devlist[i]))
 209                                         break;
 210                         }
 211                         if (!l)
 212                                 /* This device matched none of the ones that
 213                                  * matched the conn specification. */
 214                                 continue;
 215                 }
 216
 217                 if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) {
 218                         sr_warn("Failed to get device descriptor: %s.",
 219                                 libusb_error_name(ret));
 220                         continue;
 221                 }
 222
 223                 if ((ret = libusb_open(devlist[i], &hdl)) < 0)
 224                         continue;
 225
 226                 if (des.iManufacturer == 0) {
 227                         manufacturer[0] = '\0';
 228                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 229                                 des.iManufacturer, (unsigned char *) manufacturer,
 230                                 sizeof(manufacturer))) < 0) {
 231                         sr_warn("Failed to get manufacturer string descriptor: %s.",
 232                                 libusb_error_name(ret));
 233                         continue;
 234                 }
 235
 236                 if (des.iProduct == 0) {
 237                         product[0] = '\0';
 238                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 239                                 des.iProduct, (unsigned char *) product,
 240                                 sizeof(product))) < 0) {
 241                         sr_warn("Failed to get product string descriptor: %s.",
 242                                 libusb_error_name(ret));
 243                         continue;
 244                 }
 245
 246                 if (des.iSerialNumber == 0) {
 247                         serial_num[0] = '\0';
 248                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 249                                 des.iSerialNumber, (unsigned char *) serial_num,
 250                                 sizeof(serial_num))) < 0) {
 251                         sr_warn("Failed to get serial number string descriptor: %s.",
 252                                 libusb_error_name(ret));
 253                         continue;
 254                 }
 255
 256                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 257
 258                 libusb_close(hdl);
 259
 260                 prof = NULL;
 261                 for (j = 0; supported_fx2[j].vid; j++) {
 262                         if (des.idVendor == supported_fx2[j].vid &&
 263                                         des.idProduct == supported_fx2[j].pid &&
 264                                         (!supported_fx2[j].usb_manufacturer ||
 265                                          !strcmp(manufacturer, supported_fx2[j].usb_manufacturer)) &&
 266                                         (!supported_fx2[j].usb_manufacturer ||
 267                                          !strcmp(product, supported_fx2[j].usb_product))) {
 268                                 prof = &supported_fx2[j];
 269                                 break;
 270                         }
 271                 }
 272
 273                 /* Skip if the device was not found. */
 274                 if (!prof)
 275                         continue;
 276
 277                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 278                 sdi->status = SR_ST_INITIALIZING;
 279                 sdi->vendor = g_strdup(prof->vendor);
 280                 sdi->model = g_strdup(prof->model);
 281                 sdi->version = g_strdup(prof->model_version);
 282                 sdi->driver = di;
 283                 sdi->serial_num = g_strdup(serial_num);
 284                 sdi->connection_id = g_strdup(connection_id);
 285
 286                 /* Fill in channellist according to this device's profile. */
 287                 num_logic_channels = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
 288                 for (j = 0; j < num_logic_channels; j++)
 289                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 290                                         channel_names[j]);
 291
 292                 devc = fx2lafw_dev_new();
 293                 devc->profile = prof;
 294                 devc->sample_wide = (prof->dev_caps & DEV_CAPS_16BIT) != 0;
 295                 sdi->priv = devc;
 296                 drvc->instances = g_slist_append(drvc->instances, sdi);
 297                 devices = g_slist_append(devices, sdi);
 298
 299                 if (strcmp(prof->model, "DSLogic")) {
 300                         devc->dslogic = FALSE;
 301                         devc->samplerates = samplerates;
 302                         devc->num_samplerates = ARRAY_SIZE(samplerates);
 303                         has_firmware = match_manuf_prod(devlist[i],
 304                                         "sigrok", "fx2lafw");
 305                 } else {
 306                         devc->dslogic = TRUE;
 307                         devc->samplerates = dslogic_samplerates;
 308                         devc->num_samplerates = ARRAY_SIZE(dslogic_samplerates);
 309                         has_firmware = match_manuf_prod(devlist[i],
 310                                         "DreamSourceLab", "DSLogic");
 311                 }
 312
 313                 if (has_firmware) {
 314                         /* Already has the firmware, so fix the new address. */
 315                         sr_dbg("Found an fx2lafw device.");
 316                         sdi->status = SR_ST_INACTIVE;
 317                         sdi->inst_type = SR_INST_USB;
 318                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 319                                         libusb_get_device_address(devlist[i]), NULL);
 320                 } else {
 321                         if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 322                                 prof->firmware) == SR_OK)
 323                                 /* Store when this device's FW was updated. */
 324                                 devc->fw_updated = g_get_monotonic_time();
 325                         else
 326                                 sr_err("Firmware upload failed for "
 327                                        "device %d.%d (logical).",
 328                                        libusb_get_bus_number(devlist[i]),
 329                                        libusb_get_device_address(devlist[i]));
 330                         sdi->inst_type = SR_INST_USB;
 331                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 332                                         0xff, NULL);
 333                 }
 334         }
 335         libusb_free_device_list(devlist, 1);
 336         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 337
 338         return devices;
 339 }
 340
 341 static GSList *dev_list(const struct sr_dev_driver *di)
 342 {
 343         return ((struct drv_context *)(di->priv))->instances;
 344 }
 345
 346 static int dev_open(struct sr_dev_inst *sdi)
 347 {
 348         struct sr_dev_driver *di = sdi->driver;
 349         struct sr_usb_dev_inst *usb;
 350         struct dev_context *devc;
 351         int ret;
 352         int64_t timediff_us, timediff_ms;
 353
 354         devc = sdi->priv;
 355         usb = sdi->conn;
 356
 357         /*
 358          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 359          * milliseconds for the FX2 to renumerate.
 360          */
 361         ret = SR_ERR;
 362         if (devc->fw_updated > 0) {
 363                 sr_info("Waiting for device to reset.");
 364                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 365                 g_usleep(300 * 1000);
 366                 timediff_ms = 0;
 367                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 368                         if ((ret = fx2lafw_dev_open(sdi, di)) == SR_OK)
 369                                 break;
 370                         g_usleep(100 * 1000);
 371
 372                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 373                         timediff_ms = timediff_us / 1000;
 374                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 375                 }
 376                 if (ret != SR_OK) {
 377                         sr_err("Device failed to renumerate.");
 378                         return SR_ERR;
 379                 }
 380                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 381         } else {
 382                 sr_info("Firmware upload was not needed.");
 383                 ret = fx2lafw_dev_open(sdi, di);
 384         }
 385
 386         if (ret != SR_OK) {
 387                 sr_err("Unable to open device.");
 388                 return SR_ERR;
 389         }
 390
 391         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 392         if (ret != 0) {
 393                 switch (ret) {
 394                 case LIBUSB_ERROR_BUSY:
 395                         sr_err("Unable to claim USB interface. Another "
 396                                "program or driver has already claimed it.");
 397                         break;
 398                 case LIBUSB_ERROR_NO_DEVICE:
 399                         sr_err("Device has been disconnected.");
 400                         break;
 401                 default:
 402                         sr_err("Unable to claim interface: %s.",
 403                                libusb_error_name(ret));
 404                         break;
 405                 }
 406
 407                 return SR_ERR;
 408         }
 409
 410         if (devc->dslogic) {
 411                 if ((ret = dslogic_fpga_firmware_upload(sdi,
 412                                 DSLOGIC_FPGA_FIRMWARE)) != SR_OK)
 413                         return ret;
 414         }
 415
 416         if (devc->cur_samplerate == 0) {
 417                 /* Samplerate hasn't been set; default to the slowest one. */
 418                 devc->cur_samplerate = devc->samplerates[0];
 419         }
 420
 421         return SR_OK;
 422 }
 423
 424 static int dev_close(struct sr_dev_inst *sdi)
 425 {
 426         struct sr_usb_dev_inst *usb;
 427
 428         usb = sdi->conn;
 429         if (!usb->devhdl)
 430                 return SR_ERR;
 431
 432         sr_info("fx2lafw: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 433                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 434         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 435         libusb_close(usb->devhdl);
 436         usb->devhdl = NULL;
 437         sdi->status = SR_ST_INACTIVE;
 438
 439         return SR_OK;
 440 }
 441
 442 static int cleanup(const struct sr_dev_driver *di)
 443 {
 444         int ret;
 445         struct drv_context *drvc;
 446
 447         if (!(drvc = di->priv))
 448                 return SR_OK;
 449
 450         ret = std_dev_clear(di, NULL);
 451
 452         g_free(drvc);
 453
 454         return ret;
 455 }
 456
 457 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 458                 const struct sr_channel_group *cg)
 459 {
 460         struct dev_context *devc;
 461         struct sr_usb_dev_inst *usb;
 462         char str[128];
 463
 464         (void)cg;
 465
 466         if (!sdi)
 467                 return SR_ERR_ARG;
 468
 469         devc = sdi->priv;
 470
 471         switch (key) {
 472         case SR_CONF_CONN:
 473                 if (!sdi->conn)
 474                         return SR_ERR_ARG;
 475                 usb = sdi->conn;
 476                 if (usb->address == 255)
 477                         /* Device still needs to re-enumerate after firmware
 478                          * upload, so we don't know its (future) address. */
 479                         return SR_ERR;
 480                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 481                 *data = g_variant_new_string(str);
 482                 break;
 483         case SR_CONF_LIMIT_SAMPLES:
 484                 *data = g_variant_new_uint64(devc->limit_samples);
 485                 break;
 486         case SR_CONF_SAMPLERATE:
 487                 *data = g_variant_new_uint64(devc->cur_samplerate);
 488                 break;
 489         case SR_CONF_CAPTURE_RATIO:
 490                 *data = g_variant_new_uint64(devc->capture_ratio);
 491                 break;
 492         default:
 493                 return SR_ERR_NA;
 494         }
 495
 496         return SR_OK;
 497 }
 498
 499 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 500                 const struct sr_channel_group *cg)
 501 {
 502         struct dev_context *devc;
 503         uint64_t arg;
 504         unsigned int i;
 505         int ret;
 506
 507         (void)cg;
 508
 509         if (!sdi)
 510                 return SR_ERR_ARG;
 511
 512         if (sdi->status != SR_ST_ACTIVE)
 513                 return SR_ERR;
 514
 515         devc = sdi->priv;
 516
 517         ret = SR_OK;
 518
 519         switch (key) {
 520         case SR_CONF_SAMPLERATE:
 521                 arg = g_variant_get_uint64(data);
 522                 for (i = 0; i < ARRAY_SIZE(samplerates); i++) {
 523                         if (samplerates[i] == arg) {
 524                                 devc->cur_samplerate = arg;
 525                                 break;
 526                         }
 527                 }
 528                 if (i == ARRAY_SIZE(samplerates))
 529                         ret = SR_ERR_ARG;
 530                 break;
 531         case SR_CONF_LIMIT_SAMPLES:
 532                 devc->limit_samples = g_variant_get_uint64(data);
 533                 break;
 534         case SR_CONF_CAPTURE_RATIO:
 535                 devc->capture_ratio = g_variant_get_uint64(data);
 536                 if (devc->capture_ratio > 100) {
 537                         devc->capture_ratio = 0;
 538                         ret = SR_ERR;
 539                 } else
 540                         ret = SR_OK;
 541                 break;
 542         default:
 543                 ret = SR_ERR_NA;
 544         }
 545
 546         return ret;
 547 }
 548
 549 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 550                 const struct sr_channel_group *cg)
 551 {
 552         struct dev_context *devc;
 553         GVariant *gvar;
 554         GVariantBuilder gvb;
 555
 556         (void)cg;
 557
 558         switch (key) {
 559         case SR_CONF_SCAN_OPTIONS:
 560                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 561                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 562                 break;
 563         case SR_CONF_DEVICE_OPTIONS:
 564                 if (!sdi)
 565                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 566                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 567                 else
 568                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 569                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 570                 break;
 571         case SR_CONF_SAMPLERATE:
 572                 if (!sdi->priv)
 573                         return SR_ERR_ARG;
 574                 devc = sdi->priv;
 575                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 576                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), devc->samplerates,
 577                                 devc->num_samplerates, sizeof(uint64_t));
 578                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 579                 *data = g_variant_builder_end(&gvb);
 580                 break;
 581         case SR_CONF_TRIGGER_MATCH:
 582                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 583                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 584                                 sizeof(int32_t));
 585                 break;
 586         default:
 587                 return SR_ERR_NA;
 588         }
 589
 590         return SR_OK;
 591 }
 592
 593 static int receive_data(int fd, int revents, void *cb_data)
 594 {
 595         struct timeval tv;
 596         struct drv_context *drvc;
 597
 598         (void)fd;
 599         (void)revents;
 600
 601         drvc = (struct drv_context *)cb_data;
 602
 603         tv.tv_sec = tv.tv_usec = 0;
 604         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 605
 606         return TRUE;
 607 }
 608
 609 static int start_transfers(const struct sr_dev_inst *sdi)
 610 {
 611         struct dev_context *devc;
 612         struct sr_usb_dev_inst *usb;
 613         struct sr_trigger *trigger;
 614         struct libusb_transfer *transfer;
 615         unsigned int i, num_transfers;
 616         int endpoint, timeout, ret;
 617         unsigned char *buf;
 618         size_t size;
 619
 620         devc = sdi->priv;
 621         usb = sdi->conn;
 622
 623         devc->sent_samples = 0;
 624         devc->acq_aborted = FALSE;
 625         devc->empty_transfer_count = 0;
 626
 627         if ((trigger = sr_session_trigger_get(sdi->session))) {
 628                 int pre_trigger_samples = 0;
 629                 if (devc->limit_samples > 0)
 630                         pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
 631                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 632                 if (!devc->stl)
 633                         return SR_ERR_MALLOC;
 634                 devc->trigger_fired = FALSE;
 635         } else
 636                 devc->trigger_fired = TRUE;
 637
 638         timeout = fx2lafw_get_timeout(devc);
 639
 640         num_transfers = fx2lafw_get_number_of_transfers(devc);
 641         size = fx2lafw_get_buffer_size(devc);
 642         devc->submitted_transfers = 0;
 643
 644         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 645         if (!devc->transfers) {
 646                 sr_err("USB transfers malloc failed.");
 647                 return SR_ERR_MALLOC;
 648         }
 649
 650         timeout = fx2lafw_get_timeout(devc);
 651         endpoint = devc->dslogic ? 6 : 2;
 652         devc->num_transfers = num_transfers;
 653         for (i = 0; i < num_transfers; i++) {
 654                 if (!(buf = g_try_malloc(size))) {
 655                         sr_err("USB transfer buffer malloc failed.");
 656                         return SR_ERR_MALLOC;
 657                 }
 658                 transfer = libusb_alloc_transfer(0);
 659                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 660                                 endpoint | LIBUSB_ENDPOINT_IN, buf, size,
 661                                 fx2lafw_receive_transfer, (void *)sdi, timeout);
 662                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 663                         sr_err("Failed to submit transfer: %s.",
 664                                libusb_error_name(ret));
 665                         libusb_free_transfer(transfer);
 666                         g_free(buf);
 667                         fx2lafw_abort_acquisition(devc);
 668                         return SR_ERR;
 669                 }
 670                 devc->transfers[i] = transfer;
 671                 devc->submitted_transfers++;
 672         }
 673
 674         /* Send header packet to the session bus. */
 675         std_session_send_df_header(sdi, LOG_PREFIX);
 676
 677         return SR_OK;
 678 }
 679
 680 static void LIBUSB_CALL dslogic_trigger_receive(struct libusb_transfer *transfer)
 681 {
 682         const struct sr_dev_inst *sdi;
 683         struct dslogic_trigger_pos *tpos;
 684
 685         sdi = transfer->user_data;
 686
 687         if (transfer->status == LIBUSB_TRANSFER_COMPLETED
 688                         && transfer->actual_length == sizeof(struct dslogic_trigger_pos)) {
 689                 tpos = (struct dslogic_trigger_pos *)transfer->buffer;
 690                 sr_dbg("tpos real_pos %.8x ram_saddr %.8x", tpos->real_pos, tpos->ram_saddr);
 691                 g_free(tpos);
 692                 start_transfers(sdi);
 693         }
 694
 695         libusb_free_transfer(transfer);
 696
 697 }
 698
 699 static int dslogic_trigger_request(const struct sr_dev_inst *sdi)
 700 {
 701         struct sr_usb_dev_inst *usb;
 702         struct libusb_transfer *transfer;
 703         struct dslogic_trigger_pos *tpos;
 704         int ret;
 705
 706         usb = sdi->conn;
 707
 708         if ((ret = dslogic_stop_acquisition(sdi)) != SR_OK)
 709                 return ret;
 710
 711         if ((ret = dslogic_fpga_configure(sdi)) != SR_OK)
 712                 return ret;
 713
 714         if ((ret = dslogic_start_acquisition(sdi)) != SR_OK)
 715                 return ret;
 716
 717         sr_dbg("Getting trigger.");
 718         tpos = g_malloc(sizeof(struct dslogic_trigger_pos));
 719         transfer = libusb_alloc_transfer(0);
 720         libusb_fill_bulk_transfer(transfer, usb->devhdl, 6 | LIBUSB_ENDPOINT_IN,
 721                         (unsigned char *)tpos, sizeof(struct dslogic_trigger_pos),
 722                         dslogic_trigger_receive, (void *)sdi, 0);
 723         if ((ret = libusb_submit_transfer(transfer)) < 0) {
 724                 sr_err("Failed to request trigger: %s.", libusb_error_name(ret));
 725                 libusb_free_transfer(transfer);
 726                 g_free(tpos);
 727                 return SR_ERR;
 728         }
 729
 730         return ret;
 731 }
 732
 733 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 734 {
 735         struct sr_dev_driver *di;
 736         struct drv_context *drvc;
 737         struct dev_context *devc;
 738         int timeout, ret;
 739
 740         if (sdi->status != SR_ST_ACTIVE)
 741                 return SR_ERR_DEV_CLOSED;
 742
 743         di = sdi->driver;
 744         drvc = di->priv;
 745         devc = sdi->priv;
 746
 747         devc->ctx = drvc->sr_ctx;
 748         devc->cb_data = cb_data;
 749         devc->sent_samples = 0;
 750         devc->empty_transfer_count = 0;
 751         devc->acq_aborted = FALSE;
 752
 753         timeout = fx2lafw_get_timeout(devc);
 754         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, drvc);
 755
 756         if (devc->dslogic) {
 757                 dslogic_trigger_request(sdi);
 758         }
 759         else {
 760                 if ((ret = fx2lafw_command_start_acquisition(sdi)) != SR_OK)
 761                         return ret;
 762                 start_transfers(sdi);
 763         }
 764
 765         return SR_OK;
 766 }
 767
 768 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 769 {
 770         (void)cb_data;
 771
 772         fx2lafw_abort_acquisition(sdi->priv);
 773
 774         return SR_OK;
 775 }
 776
 777 SR_PRIV struct sr_dev_driver fx2lafw_driver_info = {
 778         .name = "fx2lafw",
 779         .longname = "fx2lafw (generic driver for FX2 based LAs)",
 780         .api_version = 1,
 781         .init = init,
 782         .cleanup = cleanup,
 783         .scan = scan,
 784         .dev_list = dev_list,
 785         .dev_clear = NULL,
 786         .config_get = config_get,
 787         .config_set = config_set,
 788         .config_list = config_list,
 789         .dev_open = dev_open,
 790         .dev_close = dev_close,
 791         .dev_acquisition_start = dev_acquisition_start,
 792         .dev_acquisition_stop = dev_acquisition_stop,
 793         .priv = NULL,
 794 };