src/hardware/saleae-logic16/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
   5  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   6  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <config.h>
  23 #include <glib.h>
  24 #include <libusb.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <math.h>
  28 #include <libsigrok/libsigrok.h>
  29 #include "libsigrok-internal.h"
  30 #include "protocol.h"
  31
  32 #define LOGIC16_VID             0x21a9
  33 #define LOGIC16_PID             0x1001
  34
  35 #define USB_INTERFACE           0
  36 #define USB_CONFIGURATION       1
  37 #define FX2_FIRMWARE            "saleae-logic16-fx2.fw"
  38
  39 #define MAX_RENUM_DELAY_MS      3000
  40 #define NUM_SIMUL_TRANSFERS     32
  41
  42 static const uint32_t scanopts[] = {
  43         SR_CONF_CONN,
  44 };
  45
  46 static const uint32_t drvopts[] = {
  47         SR_CONF_LOGIC_ANALYZER,
  48 };
  49
  50 static const uint32_t devopts[] = {
  51         SR_CONF_CONTINUOUS,
  52         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  53         SR_CONF_CONN | SR_CONF_GET,
  54         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  55         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  56         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  57         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  58 };
  59
  60 static const int32_t trigger_matches[] = {
  61         SR_TRIGGER_ZERO,
  62         SR_TRIGGER_ONE,
  63         SR_TRIGGER_RISING,
  64         SR_TRIGGER_FALLING,
  65         SR_TRIGGER_EDGE,
  66 };
  67
  68 static const char *channel_names[] = {
  69         "0", "1", "2", "3", "4", "5", "6", "7", "8",
  70         "9", "10", "11", "12", "13", "14", "15",
  71 };
  72
  73 static const struct {
  74         enum voltage_range range;
  75 } thresholds_ranges[] = {
  76         { VOLTAGE_RANGE_18_33_V, },
  77         { VOLTAGE_RANGE_5_V, },
  78 };
  79
  80 static const double thresholds[][2] = {
  81         { 0.7, 1.4 },
  82         { 1.4, 3.6 },
  83 };
  84
  85 static const uint64_t samplerates[] = {
  86         SR_KHZ(500),
  87         SR_MHZ(1),
  88         SR_MHZ(2),
  89         SR_MHZ(4),
  90         SR_MHZ(5),
  91         SR_MHZ(8),
  92         SR_MHZ(10),
  93         SR_KHZ(12500),
  94         SR_MHZ(16),
  95         SR_MHZ(20),
  96         SR_MHZ(25),
  97         SR_MHZ(32),
  98         SR_MHZ(40),
  99         SR_MHZ(50),
 100         SR_MHZ(80),
 101         SR_MHZ(100),
 102 };
 103
 104 static gboolean check_conf_profile(libusb_device *dev)
 105 {
 106         struct libusb_device_descriptor des;
 107         struct libusb_device_handle *hdl;
 108         gboolean ret;
 109         unsigned char strdesc[64];
 110
 111         hdl = NULL;
 112         ret = FALSE;
 113         while (!ret) {
 114                 /* Assume the FW has not been loaded, unless proven wrong. */
 115                 libusb_get_device_descriptor(dev, &des);
 116
 117                 if (libusb_open(dev, &hdl) != 0)
 118                         break;
 119
 120                 if (libusb_get_string_descriptor_ascii(hdl,
 121                     des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
 122                         break;
 123                 if (strcmp((const char *)strdesc, "Saleae LLC"))
 124                         break;
 125
 126                 if (libusb_get_string_descriptor_ascii(hdl,
 127                     des.iProduct, strdesc, sizeof(strdesc)) < 0)
 128                         break;
 129                 if (strcmp((const char *)strdesc, "Logic S/16"))
 130                         break;
 131
 132                 /* If we made it here, it must be a configured Logic16. */
 133                 ret = TRUE;
 134         }
 135         if (hdl)
 136                 libusb_close(hdl);
 137
 138         return ret;
 139 }
 140
 141 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 142 {
 143         struct drv_context *drvc;
 144         struct dev_context *devc;
 145         struct sr_dev_inst *sdi;
 146         struct sr_usb_dev_inst *usb;
 147         struct sr_config *src;
 148         GSList *l, *devices, *conn_devices;
 149         struct libusb_device_descriptor des;
 150         libusb_device **devlist;
 151         unsigned int i, j;
 152         const char *conn;
 153         char connection_id[64];
 154
 155         drvc = di->context;
 156
 157         conn = NULL;
 158         for (l = options; l; l = l->next) {
 159                 src = l->data;
 160                 switch (src->key) {
 161                 case SR_CONF_CONN:
 162                         conn = g_variant_get_string(src->data, NULL);
 163                         break;
 164                 }
 165         }
 166         if (conn)
 167                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 168         else
 169                 conn_devices = NULL;
 170
 171         /* Find all Logic16 devices and upload firmware to them. */
 172         devices = NULL;
 173         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 174         for (i = 0; devlist[i]; i++) {
 175                 if (conn) {
 176                         usb = NULL;
 177                         for (l = conn_devices; l; l = l->next) {
 178                                 usb = l->data;
 179                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 180                                     && usb->address == libusb_get_device_address(devlist[i]))
 181                                         break;
 182                         }
 183                         if (!l)
 184                                 /* This device matched none of the ones that
 185                                  * matched the conn specification. */
 186                                 continue;
 187                 }
 188
 189                 libusb_get_device_descriptor(devlist[i], &des);
 190
 191                 if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
 192                         continue;
 193
 194                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 195                         continue;
 196
 197                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 198                 sdi->status = SR_ST_INITIALIZING;
 199                 sdi->vendor = g_strdup("Saleae");
 200                 sdi->model = g_strdup("Logic16");
 201                 sdi->connection_id = g_strdup(connection_id);
 202
 203                 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
 204                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 205                                         channel_names[j]);
 206
 207                 devc = g_malloc0(sizeof(struct dev_context));
 208                 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
 209                 sdi->priv = devc;
 210                 devices = g_slist_append(devices, sdi);
 211
 212                 if (check_conf_profile(devlist[i])) {
 213                         /* Already has the firmware, so fix the new address. */
 214                         sr_dbg("Found a Logic16 device.");
 215                         sdi->status = SR_ST_INACTIVE;
 216                         sdi->inst_type = SR_INST_USB;
 217                         sdi->conn = sr_usb_dev_inst_new(
 218                                 libusb_get_bus_number(devlist[i]),
 219                                 libusb_get_device_address(devlist[i]), NULL);
 220                 } else {
 221                         if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 222                                         USB_CONFIGURATION, FX2_FIRMWARE) == SR_OK) {
 223                                 /* Store when this device's FW was updated. */
 224                                 devc->fw_updated = g_get_monotonic_time();
 225                         } else {
 226                                 sr_err("Firmware upload failed, name %s.", FX2_FIRMWARE);
 227                         }
 228                         sdi->inst_type = SR_INST_USB;
 229                         sdi->conn = sr_usb_dev_inst_new(
 230                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 231                 }
 232         }
 233         libusb_free_device_list(devlist, 1);
 234         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 235
 236         return std_scan_complete(di, devices);
 237 }
 238
 239 static int logic16_dev_open(struct sr_dev_inst *sdi)
 240 {
 241         struct sr_dev_driver *di;
 242         libusb_device **devlist;
 243         struct sr_usb_dev_inst *usb;
 244         struct libusb_device_descriptor des;
 245         struct drv_context *drvc;
 246         int ret = SR_ERR, i, device_count;
 247         char connection_id[64];
 248
 249         di = sdi->driver;
 250         drvc = di->context;
 251         usb = sdi->conn;
 252
 253         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 254         if (device_count < 0) {
 255                 sr_err("Failed to get device list: %s.",
 256                        libusb_error_name(device_count));
 257                 return SR_ERR;
 258         }
 259
 260         for (i = 0; i < device_count; i++) {
 261                 libusb_get_device_descriptor(devlist[i], &des);
 262
 263                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 264                         continue;
 265
 266                 if ((sdi->status == SR_ST_INITIALIZING) ||
 267                                 (sdi->status == SR_ST_INACTIVE)) {
 268                         /*
 269                          * Check device by its physical USB bus/port address.
 270                          */
 271                         if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
 272                                 continue;
 273
 274                         if (strcmp(sdi->connection_id, connection_id))
 275                                 /* This is not the one. */
 276                                 continue;
 277                 }
 278
 279                 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
 280                         if (usb->address == 0xff)
 281                                 /*
 282                                  * First time we touch this device after FW
 283                                  * upload, so we don't know the address yet.
 284                                  */
 285                                 usb->address = libusb_get_device_address(devlist[i]);
 286                 } else {
 287                         sr_err("Failed to open device: %s.",
 288                                libusb_error_name(ret));
 289                         ret = SR_ERR;
 290                         break;
 291                 }
 292
 293                 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 294                 if (ret == LIBUSB_ERROR_BUSY) {
 295                         sr_err("Unable to claim USB interface. Another "
 296                                "program or driver has already claimed it.");
 297                         ret = SR_ERR;
 298                         break;
 299                 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 300                         sr_err("Device has been disconnected.");
 301                         ret = SR_ERR;
 302                         break;
 303                 } else if (ret != 0) {
 304                         sr_err("Unable to claim interface: %s.",
 305                                libusb_error_name(ret));
 306                         ret = SR_ERR;
 307                         break;
 308                 }
 309
 310                 if ((ret = logic16_init_device(sdi)) != SR_OK) {
 311                         sr_err("Failed to init device.");
 312                         break;
 313                 }
 314
 315                 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
 316                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 317
 318                 ret = SR_OK;
 319
 320                 break;
 321         }
 322
 323         libusb_free_device_list(devlist, 1);
 324
 325         if (ret != SR_OK) {
 326                 if (usb->devhdl) {
 327                         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 328                         libusb_close(usb->devhdl);
 329                         usb->devhdl = NULL;
 330                 }
 331                 return SR_ERR;
 332         }
 333
 334         return SR_OK;
 335 }
 336
 337 static int dev_open(struct sr_dev_inst *sdi)
 338 {
 339         struct dev_context *devc;
 340         int ret;
 341         int64_t timediff_us, timediff_ms;
 342
 343         devc = sdi->priv;
 344
 345         /*
 346          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 347          * milliseconds for the FX2 to renumerate.
 348          */
 349         ret = SR_ERR;
 350         if (devc->fw_updated > 0) {
 351                 sr_info("Waiting for device to reset.");
 352                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 353                 g_usleep(300 * 1000);
 354                 timediff_ms = 0;
 355                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 356                         if ((ret = logic16_dev_open(sdi)) == SR_OK)
 357                                 break;
 358                         g_usleep(100 * 1000);
 359
 360                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 361                         timediff_ms = timediff_us / 1000;
 362                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 363                 }
 364                 if (ret != SR_OK) {
 365                         sr_err("Device failed to renumerate.");
 366                         return SR_ERR;
 367                 }
 368                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 369         } else {
 370                 sr_info("Firmware upload was not needed.");
 371                 ret = logic16_dev_open(sdi);
 372         }
 373
 374         if (ret != SR_OK) {
 375                 sr_err("Unable to open device.");
 376                 return SR_ERR;
 377         }
 378
 379         if (devc->cur_samplerate == 0) {
 380                 /* Samplerate hasn't been set; default to the slowest one. */
 381                 devc->cur_samplerate = samplerates[0];
 382         }
 383
 384         return SR_OK;
 385 }
 386
 387 static int dev_close(struct sr_dev_inst *sdi)
 388 {
 389         struct sr_usb_dev_inst *usb;
 390
 391         usb = sdi->conn;
 392
 393         if (!usb->devhdl)
 394                 return SR_ERR_BUG;
 395
 396         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 397                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 398         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 399         libusb_close(usb->devhdl);
 400         usb->devhdl = NULL;
 401
 402         return SR_OK;
 403 }
 404
 405 static int config_get(uint32_t key, GVariant **data,
 406         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 407 {
 408         struct dev_context *devc;
 409         struct sr_usb_dev_inst *usb;
 410         unsigned int i;
 411
 412         (void)cg;
 413
 414         switch (key) {
 415         case SR_CONF_CONN:
 416                 if (!sdi || !sdi->conn)
 417                         return SR_ERR_ARG;
 418                 usb = sdi->conn;
 419                 if (usb->address == 255)
 420                         /* Device still needs to re-enumerate after firmware
 421                          * upload, so we don't know its (future) address. */
 422                         return SR_ERR;
 423                 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
 424                 break;
 425         case SR_CONF_SAMPLERATE:
 426                 if (!sdi)
 427                         return SR_ERR;
 428                 devc = sdi->priv;
 429                 *data = g_variant_new_uint64(devc->cur_samplerate);
 430                 break;
 431         case SR_CONF_CAPTURE_RATIO:
 432                 if (!sdi)
 433                         return SR_ERR;
 434                 devc = sdi->priv;
 435                 *data = g_variant_new_uint64(devc->capture_ratio);
 436                 break;
 437         case SR_CONF_VOLTAGE_THRESHOLD:
 438                 if (!sdi)
 439                         return SR_ERR;
 440                 devc = sdi->priv;
 441                 for (i = 0; i < ARRAY_SIZE(thresholds); i++) {
 442                         if (devc->selected_voltage_range != thresholds_ranges[i].range)
 443                                 continue;
 444                         *data = std_gvar_tuple_double(thresholds[i][0], thresholds[i][1]);
 445                         return SR_OK;
 446                 }
 447                 return SR_ERR;
 448         default:
 449                 return SR_ERR_NA;
 450         }
 451
 452         return SR_OK;
 453 }
 454
 455 static int config_set(uint32_t key, GVariant *data,
 456         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 457 {
 458         struct dev_context *devc;
 459         int idx;
 460
 461         (void)cg;
 462
 463         devc = sdi->priv;
 464
 465         switch (key) {
 466         case SR_CONF_SAMPLERATE:
 467                 devc->cur_samplerate = g_variant_get_uint64(data);
 468                 break;
 469         case SR_CONF_LIMIT_SAMPLES:
 470                 devc->limit_samples = g_variant_get_uint64(data);
 471                 break;
 472         case SR_CONF_CAPTURE_RATIO:
 473                 devc->capture_ratio = g_variant_get_uint64(data);
 474                 break;
 475         case SR_CONF_VOLTAGE_THRESHOLD:
 476                 if ((idx = std_double_tuple_idx(data, ARRAY_AND_SIZE(thresholds))) < 0)
 477                         return SR_ERR_ARG;
 478                 devc->selected_voltage_range = thresholds_ranges[idx].range;
 479                 break;
 480         default:
 481                 return SR_ERR_NA;
 482         }
 483
 484         return SR_OK;
 485 }
 486
 487 static int config_list(uint32_t key, GVariant **data,
 488         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 489 {
 490         switch (key) {
 491         case SR_CONF_SCAN_OPTIONS:
 492         case SR_CONF_DEVICE_OPTIONS:
 493                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 494         case SR_CONF_SAMPLERATE:
 495                 *data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates));
 496                 break;
 497         case SR_CONF_VOLTAGE_THRESHOLD:
 498                 *data = std_gvar_thresholds(ARRAY_AND_SIZE(thresholds));
 499                 break;
 500         case SR_CONF_TRIGGER_MATCH:
 501                 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
 502                 break;
 503         default:
 504                 return SR_ERR_NA;
 505         }
 506
 507         return SR_OK;
 508 }
 509
 510 static void abort_acquisition(struct dev_context *devc)
 511 {
 512         int i;
 513
 514         devc->sent_samples = -1;
 515
 516         for (i = devc->num_transfers - 1; i >= 0; i--) {
 517                 if (devc->transfers[i])
 518                         libusb_cancel_transfer(devc->transfers[i]);
 519         }
 520 }
 521
 522 static unsigned int bytes_per_ms(struct dev_context *devc)
 523 {
 524         return devc->cur_samplerate * devc->num_channels / 8000;
 525 }
 526
 527 static size_t get_buffer_size(struct dev_context *devc)
 528 {
 529         size_t s;
 530
 531         /*
 532          * The buffer should be large enough to hold 10ms of data and
 533          * a multiple of 512.
 534          */
 535         s = 10 * bytes_per_ms(devc);
 536         return (s + 511) & ~511;
 537 }
 538
 539 static unsigned int get_number_of_transfers(struct dev_context *devc)
 540 {
 541         unsigned int n;
 542
 543         /* Total buffer size should be able to hold about 500ms of data. */
 544         n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
 545
 546         if (n > NUM_SIMUL_TRANSFERS)
 547                 return NUM_SIMUL_TRANSFERS;
 548
 549         return n;
 550 }
 551
 552 static unsigned int get_timeout(struct dev_context *devc)
 553 {
 554         size_t total_size;
 555         unsigned int timeout;
 556
 557         total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
 558         timeout = total_size / bytes_per_ms(devc);
 559         return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
 560 }
 561
 562 static int configure_channels(const struct sr_dev_inst *sdi)
 563 {
 564         struct dev_context *devc;
 565         struct sr_channel *ch;
 566         GSList *l;
 567         uint16_t channel_bit;
 568
 569         devc = sdi->priv;
 570
 571         devc->cur_channels = 0;
 572         devc->num_channels = 0;
 573         for (l = sdi->channels; l; l = l->next) {
 574                 ch = (struct sr_channel *)l->data;
 575                 if (ch->enabled == FALSE)
 576                         continue;
 577
 578                 channel_bit = 1 << (ch->index);
 579
 580                 devc->cur_channels |= channel_bit;
 581
 582 #ifdef WORDS_BIGENDIAN
 583                 /*
 584                  * Output logic data should be stored in little endian format.
 585                  * To speed things up during conversion, do the switcharoo
 586                  * here instead.
 587                  */
 588                 channel_bit = 1 << (ch->index ^ 8);
 589 #endif
 590
 591                 devc->channel_masks[devc->num_channels++] = channel_bit;
 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 dev_context *devc;
 601         struct drv_context *drvc;
 602         const struct sr_dev_inst *sdi;
 603         struct sr_dev_driver *di;
 604
 605         (void)fd;
 606         (void)revents;
 607
 608         sdi = cb_data;
 609         di = sdi->driver;
 610         drvc = di->context;
 611         devc = sdi->priv;
 612
 613         tv.tv_sec = tv.tv_usec = 0;
 614         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 615
 616         if (devc->sent_samples == -2) {
 617                 logic16_abort_acquisition(sdi);
 618                 abort_acquisition(devc);
 619         }
 620
 621         return TRUE;
 622 }
 623
 624 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 625 {
 626         struct sr_dev_driver *di = sdi->driver;
 627         struct dev_context *devc;
 628         struct drv_context *drvc;
 629         struct sr_usb_dev_inst *usb;
 630         struct sr_trigger *trigger;
 631         struct libusb_transfer *transfer;
 632         unsigned int i, timeout, num_transfers;
 633         int ret;
 634         unsigned char *buf;
 635         size_t size, convsize;
 636
 637         drvc = di->context;
 638         devc = sdi->priv;
 639         usb = sdi->conn;
 640
 641         /* Configures devc->cur_channels. */
 642         if (configure_channels(sdi) != SR_OK) {
 643                 sr_err("Failed to configure channels.");
 644                 return SR_ERR;
 645         }
 646
 647         devc->sent_samples = 0;
 648         devc->empty_transfer_count = 0;
 649         devc->cur_channel = 0;
 650         memset(devc->channel_data, 0, sizeof(devc->channel_data));
 651
 652         if ((trigger = sr_session_trigger_get(sdi->session))) {
 653                 int pre_trigger_samples = 0;
 654                 if (devc->limit_samples > 0)
 655                         pre_trigger_samples = (devc->capture_ratio * devc->limit_samples) / 100;
 656                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 657                 if (!devc->stl)
 658                         return SR_ERR_MALLOC;
 659                 devc->trigger_fired = FALSE;
 660         } else
 661                 devc->trigger_fired = TRUE;
 662
 663         timeout = get_timeout(devc);
 664         num_transfers = get_number_of_transfers(devc);
 665         size = get_buffer_size(devc);
 666         convsize = (size / devc->num_channels + 2) * 16;
 667         devc->submitted_transfers = 0;
 668
 669         devc->convbuffer_size = convsize;
 670         if (!(devc->convbuffer = g_try_malloc(convsize))) {
 671                 sr_err("Conversion buffer malloc failed.");
 672                 return SR_ERR_MALLOC;
 673         }
 674
 675         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 676         if (!devc->transfers) {
 677                 sr_err("USB transfers malloc failed.");
 678                 g_free(devc->convbuffer);
 679                 return SR_ERR_MALLOC;
 680         }
 681
 682         if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
 683                                              devc->cur_channels)) != SR_OK) {
 684                 g_free(devc->transfers);
 685                 g_free(devc->convbuffer);
 686                 return ret;
 687         }
 688
 689         devc->num_transfers = num_transfers;
 690         for (i = 0; i < num_transfers; i++) {
 691                 if (!(buf = g_try_malloc(size))) {
 692                         sr_err("USB transfer buffer malloc failed.");
 693                         if (devc->submitted_transfers)
 694                                 abort_acquisition(devc);
 695                         else {
 696                                 g_free(devc->transfers);
 697                                 g_free(devc->convbuffer);
 698                         }
 699                         return SR_ERR_MALLOC;
 700                 }
 701                 transfer = libusb_alloc_transfer(0);
 702                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 703                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 704                                 logic16_receive_transfer, (void *)sdi, timeout);
 705                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 706                         sr_err("Failed to submit transfer: %s.",
 707                                libusb_error_name(ret));
 708                         libusb_free_transfer(transfer);
 709                         g_free(buf);
 710                         abort_acquisition(devc);
 711                         return SR_ERR;
 712                 }
 713                 devc->transfers[i] = transfer;
 714                 devc->submitted_transfers++;
 715         }
 716
 717         devc->ctx = drvc->sr_ctx;
 718
 719         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
 720
 721         std_session_send_df_header(sdi);
 722
 723         if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
 724                 abort_acquisition(devc);
 725                 return ret;
 726         }
 727
 728         return SR_OK;
 729 }
 730
 731 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 732 {
 733         int ret;
 734
 735         ret = logic16_abort_acquisition(sdi);
 736
 737         abort_acquisition(sdi->priv);
 738
 739         return ret;
 740 }
 741
 742 static struct sr_dev_driver saleae_logic16_driver_info = {
 743         .name = "saleae-logic16",
 744         .longname = "Saleae Logic16",
 745         .api_version = 1,
 746         .init = std_init,
 747         .cleanup = std_cleanup,
 748         .scan = scan,
 749         .dev_list = std_dev_list,
 750         .dev_clear = std_dev_clear,
 751         .config_get = config_get,
 752         .config_set = config_set,
 753         .config_list = config_list,
 754         .dev_open = dev_open,
 755         .dev_close = dev_close,
 756         .dev_acquisition_start = dev_acquisition_start,
 757         .dev_acquisition_stop = dev_acquisition_stop,
 758         .context = NULL,
 759 };
 760 SR_REGISTER_DEV_DRIVER(saleae_logic16_driver_info);