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         NULL,
 112 };
 113
 114 static const int32_t soft_trigger_matches[] = {
 115         SR_TRIGGER_ZERO,
 116         SR_TRIGGER_ONE,
 117         SR_TRIGGER_RISING,
 118         SR_TRIGGER_FALLING,
 119         SR_TRIGGER_EDGE,
 120 };
 121
 122 static const uint64_t samplerates[] = {
 123         SR_KHZ(20),
 124         SR_KHZ(25),
 125         SR_KHZ(50),
 126         SR_KHZ(100),
 127         SR_KHZ(200),
 128         SR_KHZ(250),
 129         SR_KHZ(500),
 130         SR_MHZ(1),
 131         SR_MHZ(2),
 132         SR_MHZ(3),
 133         SR_MHZ(4),
 134         SR_MHZ(6),
 135         SR_MHZ(8),
 136         SR_MHZ(12),
 137         SR_MHZ(16),
 138         SR_MHZ(24),
 139 };
 140
 141 static const uint64_t dslogic_samplerates[] = {
 142         SR_KHZ(10),
 143         SR_KHZ(20),
 144         SR_KHZ(50),
 145         SR_KHZ(100),
 146         SR_KHZ(200),
 147         SR_KHZ(500),
 148         SR_MHZ(1),
 149         SR_MHZ(2),
 150         SR_MHZ(5),
 151         SR_MHZ(10),
 152         SR_MHZ(20),
 153         SR_MHZ(25),
 154         SR_MHZ(50),
 155         SR_MHZ(100),
 156         SR_MHZ(200),
 157         SR_MHZ(400),
 158 };
 159
 160 SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
 161
 162 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
 163 {
 164         return std_init(sr_ctx, di, LOG_PREFIX);
 165 }
 166
 167 static GSList *scan(struct sr_dev_driver *di, 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_config *src;
 174         const struct fx2lafw_profile *prof;
 175         GSList *l, *devices, *conn_devices;
 176         gboolean has_firmware;
 177         struct libusb_device_descriptor des;
 178         libusb_device **devlist;
 179         struct libusb_device_handle *hdl;
 180         int num_logic_channels, ret, i, j;
 181         const char *conn;
 182         char manufacturer[64], product[64], serial_num[64], connection_id[64];
 183
 184         drvc = di->priv;
 185
 186         conn = NULL;
 187         for (l = options; l; l = l->next) {
 188                 src = l->data;
 189                 switch (src->key) {
 190                 case SR_CONF_CONN:
 191                         conn = g_variant_get_string(src->data, NULL);
 192                         break;
 193                 }
 194         }
 195         if (conn)
 196                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 197         else
 198                 conn_devices = NULL;
 199
 200         /* Find all fx2lafw compatible devices and upload firmware to them. */
 201         devices = NULL;
 202         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 203         for (i = 0; devlist[i]; i++) {
 204                 if (conn) {
 205                         usb = NULL;
 206                         for (l = conn_devices; l; l = l->next) {
 207                                 usb = l->data;
 208                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 209                                         && usb->address == libusb_get_device_address(devlist[i]))
 210                                         break;
 211                         }
 212                         if (!l)
 213                                 /* This device matched none of the ones that
 214                                  * matched the conn specification. */
 215                                 continue;
 216                 }
 217
 218                 if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) {
 219                         sr_warn("Failed to get device descriptor: %s.",
 220                                 libusb_error_name(ret));
 221                         continue;
 222                 }
 223
 224                 if ((ret = libusb_open(devlist[i], &hdl)) < 0)
 225                         continue;
 226
 227                 if (des.iManufacturer == 0) {
 228                         manufacturer[0] = '\0';
 229                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 230                                 des.iManufacturer, (unsigned char *) manufacturer,
 231                                 sizeof(manufacturer))) < 0) {
 232                         sr_warn("Failed to get manufacturer string descriptor: %s.",
 233                                 libusb_error_name(ret));
 234                         continue;
 235                 }
 236
 237                 if (des.iProduct == 0) {
 238                         product[0] = '\0';
 239                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 240                                 des.iProduct, (unsigned char *) product,
 241                                 sizeof(product))) < 0) {
 242                         sr_warn("Failed to get product string descriptor: %s.",
 243                                 libusb_error_name(ret));
 244                         continue;
 245                 }
 246
 247                 if (des.iSerialNumber == 0) {
 248                         serial_num[0] = '\0';
 249                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 250                                 des.iSerialNumber, (unsigned char *) serial_num,
 251                                 sizeof(serial_num))) < 0) {
 252                         sr_warn("Failed to get serial number string descriptor: %s.",
 253                                 libusb_error_name(ret));
 254                         continue;
 255                 }
 256
 257                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 258
 259                 libusb_close(hdl);
 260
 261                 prof = NULL;
 262                 for (j = 0; supported_fx2[j].vid; j++) {
 263                         if (des.idVendor == supported_fx2[j].vid &&
 264                                         des.idProduct == supported_fx2[j].pid &&
 265                                         (!supported_fx2[j].usb_manufacturer ||
 266                                          !strcmp(manufacturer, supported_fx2[j].usb_manufacturer)) &&
 267                                         (!supported_fx2[j].usb_manufacturer ||
 268                                          !strcmp(product, supported_fx2[j].usb_product))) {
 269                                 prof = &supported_fx2[j];
 270                                 break;
 271                         }
 272                 }
 273
 274                 /* Skip if the device was not found. */
 275                 if (!prof)
 276                         continue;
 277
 278                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 279                 sdi->status = SR_ST_INITIALIZING;
 280                 sdi->vendor = g_strdup(prof->vendor);
 281                 sdi->model = g_strdup(prof->model);
 282                 sdi->version = g_strdup(prof->model_version);
 283                 sdi->driver = di;
 284                 sdi->serial_num = g_strdup(serial_num);
 285                 sdi->connection_id = g_strdup(connection_id);
 286
 287                 /* Fill in channellist according to this device's profile. */
 288                 num_logic_channels = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
 289                 for (j = 0; j < num_logic_channels; j++)
 290                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 291                                         channel_names[j]);
 292
 293                 devc = fx2lafw_dev_new();
 294                 devc->profile = prof;
 295                 devc->sample_wide = (prof->dev_caps & DEV_CAPS_16BIT) != 0;
 296                 sdi->priv = devc;
 297                 drvc->instances = g_slist_append(drvc->instances, sdi);
 298                 devices = g_slist_append(devices, sdi);
 299
 300                 if (strcmp(prof->model, "DSLogic")) {
 301                         devc->dslogic = FALSE;
 302                         devc->samplerates = samplerates;
 303                         devc->num_samplerates = ARRAY_SIZE(samplerates);
 304                         has_firmware = match_manuf_prod(devlist[i],
 305                                         "sigrok", "fx2lafw");
 306                 } else {
 307                         devc->dslogic = TRUE;
 308                         devc->samplerates = dslogic_samplerates;
 309                         devc->num_samplerates = ARRAY_SIZE(dslogic_samplerates);
 310                         has_firmware = match_manuf_prod(devlist[i],
 311                                         "DreamSourceLab", "DSLogic");
 312                 }
 313
 314                 if (has_firmware) {
 315                         /* Already has the firmware, so fix the new address. */
 316                         sr_dbg("Found an fx2lafw device.");
 317                         sdi->status = SR_ST_INACTIVE;
 318                         sdi->inst_type = SR_INST_USB;
 319                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 320                                         libusb_get_device_address(devlist[i]), NULL);
 321                 } else {
 322                         if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 323                                 prof->firmware) == SR_OK)
 324                                 /* Store when this device's FW was updated. */
 325                                 devc->fw_updated = g_get_monotonic_time();
 326                         else
 327                                 sr_err("Firmware upload failed for "
 328                                        "device %d.%d (logical).",
 329                                        libusb_get_bus_number(devlist[i]),
 330                                        libusb_get_device_address(devlist[i]));
 331                         sdi->inst_type = SR_INST_USB;
 332                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 333                                         0xff, NULL);
 334                 }
 335         }
 336         libusb_free_device_list(devlist, 1);
 337         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 338
 339         return devices;
 340 }
 341
 342 static GSList *dev_list(const struct sr_dev_driver *di)
 343 {
 344         return ((struct drv_context *)(di->priv))->instances;
 345 }
 346
 347 static int dev_open(struct sr_dev_inst *sdi)
 348 {
 349         struct sr_dev_driver *di = sdi->driver;
 350         struct sr_usb_dev_inst *usb;
 351         struct dev_context *devc;
 352         int ret;
 353         int64_t timediff_us, timediff_ms;
 354
 355         devc = sdi->priv;
 356         usb = sdi->conn;
 357
 358         /*
 359          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 360          * milliseconds for the FX2 to renumerate.
 361          */
 362         ret = SR_ERR;
 363         if (devc->fw_updated > 0) {
 364                 sr_info("Waiting for device to reset.");
 365                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 366                 g_usleep(300 * 1000);
 367                 timediff_ms = 0;
 368                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 369                         if ((ret = fx2lafw_dev_open(sdi, di)) == SR_OK)
 370                                 break;
 371                         g_usleep(100 * 1000);
 372
 373                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 374                         timediff_ms = timediff_us / 1000;
 375                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 376                 }
 377                 if (ret != SR_OK) {
 378                         sr_err("Device failed to renumerate.");
 379                         return SR_ERR;
 380                 }
 381                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 382         } else {
 383                 sr_info("Firmware upload was not needed.");
 384                 ret = fx2lafw_dev_open(sdi, di);
 385         }
 386
 387         if (ret != SR_OK) {
 388                 sr_err("Unable to open device.");
 389                 return SR_ERR;
 390         }
 391
 392         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 393         if (ret != 0) {
 394                 switch (ret) {
 395                 case LIBUSB_ERROR_BUSY:
 396                         sr_err("Unable to claim USB interface. Another "
 397                                "program or driver has already claimed it.");
 398                         break;
 399                 case LIBUSB_ERROR_NO_DEVICE:
 400                         sr_err("Device has been disconnected.");
 401                         break;
 402                 default:
 403                         sr_err("Unable to claim interface: %s.",
 404                                libusb_error_name(ret));
 405                         break;
 406                 }
 407
 408                 return SR_ERR;
 409         }
 410
 411         if (devc->dslogic) {
 412                 if ((ret = dslogic_fpga_firmware_upload(sdi,
 413                                 DSLOGIC_FPGA_FIRMWARE)) != SR_OK)
 414                         return ret;
 415         }
 416
 417         if (devc->cur_samplerate == 0) {
 418                 /* Samplerate hasn't been set; default to the slowest one. */
 419                 devc->cur_samplerate = devc->samplerates[0];
 420         }
 421
 422         return SR_OK;
 423 }
 424
 425 static int dev_close(struct sr_dev_inst *sdi)
 426 {
 427         struct sr_usb_dev_inst *usb;
 428
 429         usb = sdi->conn;
 430         if (usb->devhdl == NULL)
 431                 return SR_ERR;
 432
 433         sr_info("fx2lafw: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 434                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 435         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 436         libusb_close(usb->devhdl);
 437         usb->devhdl = NULL;
 438         sdi->status = SR_ST_INACTIVE;
 439
 440         return SR_OK;
 441 }
 442
 443 static int cleanup(const struct sr_dev_driver *di)
 444 {
 445         int ret;
 446         struct drv_context *drvc;
 447
 448         if (!(drvc = di->priv))
 449                 return SR_OK;
 450
 451         ret = std_dev_clear(di, NULL);
 452
 453         g_free(drvc);
 454
 455         return ret;
 456 }
 457
 458 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 459                 const struct sr_channel_group *cg)
 460 {
 461         struct dev_context *devc;
 462         struct sr_usb_dev_inst *usb;
 463         char str[128];
 464
 465         (void)cg;
 466
 467         if (!sdi)
 468                 return SR_ERR_ARG;
 469
 470         devc = sdi->priv;
 471
 472         switch (key) {
 473         case SR_CONF_CONN:
 474                 if (!sdi->conn)
 475                         return SR_ERR_ARG;
 476                 usb = sdi->conn;
 477                 if (usb->address == 255)
 478                         /* Device still needs to re-enumerate after firmware
 479                          * upload, so we don't know its (future) address. */
 480                         return SR_ERR;
 481                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 482                 *data = g_variant_new_string(str);
 483                 break;
 484         case SR_CONF_LIMIT_SAMPLES:
 485                 *data = g_variant_new_uint64(devc->limit_samples);
 486                 break;
 487         case SR_CONF_SAMPLERATE:
 488                 *data = g_variant_new_uint64(devc->cur_samplerate);
 489                 break;
 490         case SR_CONF_CAPTURE_RATIO:
 491                 *data = g_variant_new_uint64(devc->capture_ratio);
 492                 break;
 493         default:
 494                 return SR_ERR_NA;
 495         }
 496
 497         return SR_OK;
 498 }
 499
 500 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 501                 const struct sr_channel_group *cg)
 502 {
 503         struct dev_context *devc;
 504         uint64_t arg;
 505         unsigned int i;
 506         int ret;
 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 < ARRAY_SIZE(samplerates); i++) {
 524                                 if (samplerates[i] == arg) {
 525                                         devc->cur_samplerate = arg;
 526                                         break;
 527                                 }
 528                         }
 529                         if (i == ARRAY_SIZE(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                         if (devc->capture_ratio > 100) {
 538                                 devc->capture_ratio = 0;
 539                                 ret = SR_ERR;
 540                         } else
 541                                 ret = SR_OK;
 542                         break;
 543                 default:
 544                         ret = SR_ERR_NA;
 545         }
 546
 547         return ret;
 548 }
 549
 550 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 551                 const struct sr_channel_group *cg)
 552 {
 553         struct dev_context *devc;
 554         GVariant *gvar;
 555         GVariantBuilder gvb;
 556
 557         (void)cg;
 558
 559         switch (key) {
 560         case SR_CONF_SCAN_OPTIONS:
 561                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 562                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 563                 break;
 564         case SR_CONF_DEVICE_OPTIONS:
 565                 if (!sdi)
 566                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 567                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 568                 else
 569                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 570                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 571                 break;
 572         case SR_CONF_SAMPLERATE:
 573                 if (!sdi->priv)
 574                         return SR_ERR_ARG;
 575                 devc = sdi->priv;
 576                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 577                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), devc->samplerates,
 578                                 devc->num_samplerates, sizeof(uint64_t));
 579                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 580                 *data = g_variant_builder_end(&gvb);
 581                 break;
 582         case SR_CONF_TRIGGER_MATCH:
 583                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 584                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 585                                 sizeof(int32_t));
 586                 break;
 587         default:
 588                 return SR_ERR_NA;
 589         }
 590
 591         return SR_OK;
 592 }
 593
 594 static int receive_data(int fd, int revents, void *cb_data)
 595 {
 596         struct timeval tv;
 597         struct drv_context *drvc;
 598
 599         (void)fd;
 600         (void)revents;
 601
 602         drvc = (struct drv_context *)cb_data;
 603
 604         tv.tv_sec = tv.tv_usec = 0;
 605         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 606
 607         return TRUE;
 608 }
 609
 610 static int start_transfers(const struct sr_dev_inst *sdi)
 611 {
 612         struct dev_context *devc;
 613         struct sr_usb_dev_inst *usb;
 614         struct sr_trigger *trigger;
 615         struct libusb_transfer *transfer;
 616         unsigned int i, num_transfers;
 617         int endpoint, timeout, ret;
 618         unsigned char *buf;
 619         size_t size;
 620
 621         devc = sdi->priv;
 622         usb = sdi->conn;
 623
 624         devc->sent_samples = 0;
 625         devc->acq_aborted = FALSE;
 626         devc->empty_transfer_count = 0;
 627
 628         if ((trigger = sr_session_trigger_get(sdi->session))) {
 629                 int pre_trigger_samples = 0;
 630                 if (devc->limit_samples > 0)
 631                         pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
 632                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 633                 if (devc->stl == NULL)
 634                         return SR_ERR_MALLOC;
 635                 devc->trigger_fired = FALSE;
 636         } else
 637                 devc->trigger_fired = TRUE;
 638
 639         timeout = fx2lafw_get_timeout(devc);
 640
 641         num_transfers = fx2lafw_get_number_of_transfers(devc);
 642         size = fx2lafw_get_buffer_size(devc);
 643         devc->submitted_transfers = 0;
 644
 645         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 646         if (!devc->transfers) {
 647                 sr_err("USB transfers malloc failed.");
 648                 return SR_ERR_MALLOC;
 649         }
 650
 651         timeout = fx2lafw_get_timeout(devc);
 652         endpoint = devc->dslogic ? 6 : 2;
 653         devc->num_transfers = num_transfers;
 654         for (i = 0; i < num_transfers; i++) {
 655                 if (!(buf = g_try_malloc(size))) {
 656                         sr_err("USB transfer buffer malloc failed.");
 657                         return SR_ERR_MALLOC;
 658                 }
 659                 transfer = libusb_alloc_transfer(0);
 660                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 661                                 endpoint | LIBUSB_ENDPOINT_IN, buf, size,
 662                                 fx2lafw_receive_transfer, (void *)sdi, timeout);
 663                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 664                         sr_err("Failed to submit transfer: %s.",
 665                                libusb_error_name(ret));
 666                         libusb_free_transfer(transfer);
 667                         g_free(buf);
 668                         fx2lafw_abort_acquisition(devc);
 669                         return SR_ERR;
 670                 }
 671                 devc->transfers[i] = transfer;
 672                 devc->submitted_transfers++;
 673         }
 674
 675         /* Send header packet to the session bus. */
 676         std_session_send_df_header(sdi, LOG_PREFIX);
 677
 678         return SR_OK;
 679 }
 680
 681 static void dslogic_trigger_receive(struct libusb_transfer *transfer)
 682 {
 683         const struct sr_dev_inst *sdi;
 684         struct dslogic_trigger_pos *tpos;
 685
 686         sdi = transfer->user_data;
 687
 688         if (transfer->status == LIBUSB_TRANSFER_COMPLETED
 689                         && transfer->actual_length == sizeof(struct dslogic_trigger_pos)) {
 690                 tpos = (struct dslogic_trigger_pos *)transfer->buffer;
 691                 sr_dbg("tpos real_pos %.8x ram_saddr %.8x", tpos->real_pos, tpos->ram_saddr);
 692                 g_free(tpos);
 693                 start_transfers(sdi);
 694         }
 695
 696         libusb_free_transfer(transfer);
 697
 698 }
 699
 700 static int dslogic_trigger_request(const struct sr_dev_inst *sdi)
 701 {
 702         struct sr_usb_dev_inst *usb;
 703         struct libusb_transfer *transfer;
 704         struct dslogic_trigger_pos *tpos;
 705         int ret;
 706
 707         usb = sdi->conn;
 708
 709         if ((ret = dslogic_stop_acquisition(sdi)) != SR_OK)
 710                 return ret;
 711
 712         if ((ret = dslogic_fpga_configure(sdi)) != SR_OK)
 713                 return ret;
 714
 715         if ((ret = dslogic_start_acquisition(sdi)) != SR_OK)
 716                 return ret;
 717
 718         sr_dbg("Getting trigger.");
 719         tpos = g_malloc(sizeof(struct dslogic_trigger_pos));
 720         transfer = libusb_alloc_transfer(0);
 721         libusb_fill_bulk_transfer(transfer, usb->devhdl, 6 | LIBUSB_ENDPOINT_IN,
 722                         (unsigned char *)tpos, sizeof(struct dslogic_trigger_pos),
 723                         dslogic_trigger_receive, (void *)sdi, 0);
 724         if ((ret = libusb_submit_transfer(transfer)) < 0) {
 725                 sr_err("Failed to request trigger: %s.", libusb_error_name(ret));
 726                 libusb_free_transfer(transfer);
 727                 g_free(tpos);
 728                 return SR_ERR;
 729         }
 730
 731         return ret;
 732 }
 733
 734 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 735 {
 736         struct sr_dev_driver *di;
 737         struct drv_context *drvc;
 738         struct dev_context *devc;
 739         int timeout, ret;
 740
 741         if (sdi->status != SR_ST_ACTIVE)
 742                 return SR_ERR_DEV_CLOSED;
 743
 744         di = sdi->driver;
 745         drvc = di->priv;
 746         devc = sdi->priv;
 747
 748         devc->ctx = drvc->sr_ctx;
 749         devc->cb_data = cb_data;
 750         devc->sent_samples = 0;
 751         devc->empty_transfer_count = 0;
 752         devc->acq_aborted = FALSE;
 753
 754         timeout = fx2lafw_get_timeout(devc);
 755         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, drvc);
 756
 757         if (devc->dslogic) {
 758                 dslogic_trigger_request(sdi);
 759         }
 760         else {
 761                 if ((ret = fx2lafw_command_start_acquisition(sdi)) != SR_OK)
 762                         return ret;
 763                 start_transfers(sdi);
 764         }
 765
 766         return SR_OK;
 767 }
 768
 769 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 770 {
 771         (void)cb_data;
 772
 773         fx2lafw_abort_acquisition(sdi->priv);
 774
 775         return SR_OK;
 776 }
 777
 778 SR_PRIV struct sr_dev_driver fx2lafw_driver_info = {
 779         .name = "fx2lafw",
 780         .longname = "fx2lafw (generic driver for FX2 based LAs)",
 781         .api_version = 1,
 782         .init = init,
 783         .cleanup = cleanup,
 784         .scan = scan,
 785         .dev_list = dev_list,
 786         .dev_clear = NULL,
 787         .config_get = config_get,
 788         .config_set = config_set,
 789         .config_list = config_list,
 790         .dev_open = dev_open,
 791         .dev_close = dev_close,
 792         .dev_acquisition_start = dev_acquisition_start,
 793         .dev_acquisition_stop = dev_acquisition_stop,
 794         .priv = NULL,
 795 };