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 soft_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         gdouble low;
  76         gdouble high;
  77 } volt_thresholds[] = {
  78         { VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
  79         { VOLTAGE_RANGE_5_V,     1.4, 3.6 },
  80 };
  81
  82 static const uint64_t samplerates[] = {
  83         SR_KHZ(500),
  84         SR_MHZ(1),
  85         SR_MHZ(2),
  86         SR_MHZ(4),
  87         SR_MHZ(5),
  88         SR_MHZ(8),
  89         SR_MHZ(10),
  90         SR_KHZ(12500),
  91         SR_MHZ(16),
  92         SR_MHZ(20),
  93         SR_MHZ(25),
  94         SR_MHZ(32),
  95         SR_MHZ(40),
  96         SR_MHZ(50),
  97         SR_MHZ(80),
  98         SR_MHZ(100),
  99 };
 100
 101 static gboolean check_conf_profile(libusb_device *dev)
 102 {
 103         struct libusb_device_descriptor des;
 104         struct libusb_device_handle *hdl;
 105         gboolean ret;
 106         unsigned char strdesc[64];
 107
 108         hdl = NULL;
 109         ret = FALSE;
 110         while (!ret) {
 111                 /* Assume the FW has not been loaded, unless proven wrong. */
 112                 libusb_get_device_descriptor(dev, &des);
 113
 114                 if (libusb_open(dev, &hdl) != 0)
 115                         break;
 116
 117                 if (libusb_get_string_descriptor_ascii(hdl,
 118                     des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
 119                         break;
 120                 if (strcmp((const char *)strdesc, "Saleae LLC"))
 121                         break;
 122
 123                 if (libusb_get_string_descriptor_ascii(hdl,
 124                     des.iProduct, strdesc, sizeof(strdesc)) < 0)
 125                         break;
 126                 if (strcmp((const char *)strdesc, "Logic S/16"))
 127                         break;
 128
 129                 /* If we made it here, it must be a configured Logic16. */
 130                 ret = TRUE;
 131         }
 132         if (hdl)
 133                 libusb_close(hdl);
 134
 135         return ret;
 136 }
 137
 138 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 139 {
 140         struct drv_context *drvc;
 141         struct dev_context *devc;
 142         struct sr_dev_inst *sdi;
 143         struct sr_usb_dev_inst *usb;
 144         struct sr_config *src;
 145         GSList *l, *devices, *conn_devices;
 146         struct libusb_device_descriptor des;
 147         libusb_device **devlist;
 148         unsigned int i, j;
 149         const char *conn;
 150         char connection_id[64];
 151
 152         drvc = di->context;
 153
 154         conn = NULL;
 155         for (l = options; l; l = l->next) {
 156                 src = l->data;
 157                 switch (src->key) {
 158                 case SR_CONF_CONN:
 159                         conn = g_variant_get_string(src->data, NULL);
 160                         break;
 161                 }
 162         }
 163         if (conn)
 164                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 165         else
 166                 conn_devices = NULL;
 167
 168         /* Find all Logic16 devices and upload firmware to them. */
 169         devices = NULL;
 170         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 171         for (i = 0; devlist[i]; i++) {
 172                 if (conn) {
 173                         usb = NULL;
 174                         for (l = conn_devices; l; l = l->next) {
 175                                 usb = l->data;
 176                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 177                                     && usb->address == libusb_get_device_address(devlist[i]))
 178                                         break;
 179                         }
 180                         if (!l)
 181                                 /* This device matched none of the ones that
 182                                  * matched the conn specification. */
 183                                 continue;
 184                 }
 185
 186                 libusb_get_device_descriptor(devlist[i], &des);
 187
 188                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 189
 190                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 191                         continue;
 192
 193                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 194                 sdi->status = SR_ST_INITIALIZING;
 195                 sdi->vendor = g_strdup("Saleae");
 196                 sdi->model = g_strdup("Logic16");
 197                 sdi->connection_id = g_strdup(connection_id);
 198
 199                 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
 200                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 201                                         channel_names[j]);
 202
 203                 devc = g_malloc0(sizeof(struct dev_context));
 204                 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
 205                 sdi->priv = devc;
 206                 devices = g_slist_append(devices, sdi);
 207
 208                 if (check_conf_profile(devlist[i])) {
 209                         /* Already has the firmware, so fix the new address. */
 210                         sr_dbg("Found a Logic16 device.");
 211                         sdi->status = SR_ST_INACTIVE;
 212                         sdi->inst_type = SR_INST_USB;
 213                         sdi->conn = sr_usb_dev_inst_new(
 214                                 libusb_get_bus_number(devlist[i]),
 215                                 libusb_get_device_address(devlist[i]), NULL);
 216                 } else {
 217                         if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 218                                         USB_CONFIGURATION, FX2_FIRMWARE) == SR_OK)
 219                                 /* Store when this device's FW was updated. */
 220                                 devc->fw_updated = g_get_monotonic_time();
 221                         else
 222                                 sr_err("Firmware upload failed.");
 223                         sdi->inst_type = SR_INST_USB;
 224                         sdi->conn = sr_usb_dev_inst_new(
 225                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 226                 }
 227         }
 228         libusb_free_device_list(devlist, 1);
 229         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 230
 231         return std_scan_complete(di, devices);
 232 }
 233
 234 static int logic16_dev_open(struct sr_dev_inst *sdi)
 235 {
 236         struct sr_dev_driver *di;
 237         libusb_device **devlist;
 238         struct sr_usb_dev_inst *usb;
 239         struct libusb_device_descriptor des;
 240         struct drv_context *drvc;
 241         int ret = SR_ERR, i, device_count;
 242         char connection_id[64];
 243
 244         di = sdi->driver;
 245         drvc = di->context;
 246         usb = sdi->conn;
 247
 248         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 249         if (device_count < 0) {
 250                 sr_err("Failed to get device list: %s.",
 251                        libusb_error_name(device_count));
 252                 return SR_ERR;
 253         }
 254
 255         for (i = 0; i < device_count; i++) {
 256                 libusb_get_device_descriptor(devlist[i], &des);
 257
 258                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 259                         continue;
 260
 261                 if ((sdi->status == SR_ST_INITIALIZING) ||
 262                                 (sdi->status == SR_ST_INACTIVE)) {
 263                         /*
 264                          * Check device by its physical USB bus/port address.
 265                          */
 266                         usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 267                         if (strcmp(sdi->connection_id, connection_id))
 268                                 /* This is not the one. */
 269                                 continue;
 270                 }
 271
 272                 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
 273                         if (usb->address == 0xff)
 274                                 /*
 275                                  * First time we touch this device after FW
 276                                  * upload, so we don't know the address yet.
 277                                  */
 278                                 usb->address = libusb_get_device_address(devlist[i]);
 279                 } else {
 280                         sr_err("Failed to open device: %s.",
 281                                libusb_error_name(ret));
 282                         ret = SR_ERR;
 283                         break;
 284                 }
 285
 286                 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 287                 if (ret == LIBUSB_ERROR_BUSY) {
 288                         sr_err("Unable to claim USB interface. Another "
 289                                "program or driver has already claimed it.");
 290                         ret = SR_ERR;
 291                         break;
 292                 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 293                         sr_err("Device has been disconnected.");
 294                         ret = SR_ERR;
 295                         break;
 296                 } else if (ret != 0) {
 297                         sr_err("Unable to claim interface: %s.",
 298                                libusb_error_name(ret));
 299                         ret = SR_ERR;
 300                         break;
 301                 }
 302
 303                 if ((ret = logic16_init_device(sdi)) != SR_OK) {
 304                         sr_err("Failed to init device.");
 305                         break;
 306                 }
 307
 308                 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
 309                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 310
 311                 ret = SR_OK;
 312
 313                 break;
 314         }
 315
 316         libusb_free_device_list(devlist, 1);
 317
 318         if (ret != SR_OK) {
 319                 if (usb->devhdl) {
 320                         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 321                         libusb_close(usb->devhdl);
 322                         usb->devhdl = NULL;
 323                 }
 324                 return SR_ERR;
 325         }
 326
 327         return SR_OK;
 328 }
 329
 330 static int dev_open(struct sr_dev_inst *sdi)
 331 {
 332         struct dev_context *devc;
 333         int ret;
 334         int64_t timediff_us, timediff_ms;
 335
 336         devc = sdi->priv;
 337
 338         /*
 339          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 340          * milliseconds for the FX2 to renumerate.
 341          */
 342         ret = SR_ERR;
 343         if (devc->fw_updated > 0) {
 344                 sr_info("Waiting for device to reset.");
 345                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 346                 g_usleep(300 * 1000);
 347                 timediff_ms = 0;
 348                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 349                         if ((ret = logic16_dev_open(sdi)) == SR_OK)
 350                                 break;
 351                         g_usleep(100 * 1000);
 352
 353                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 354                         timediff_ms = timediff_us / 1000;
 355                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 356                 }
 357                 if (ret != SR_OK) {
 358                         sr_err("Device failed to renumerate.");
 359                         return SR_ERR;
 360                 }
 361                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 362         } else {
 363                 sr_info("Firmware upload was not needed.");
 364                 ret = logic16_dev_open(sdi);
 365         }
 366
 367         if (ret != SR_OK) {
 368                 sr_err("Unable to open device.");
 369                 return SR_ERR;
 370         }
 371
 372         if (devc->cur_samplerate == 0) {
 373                 /* Samplerate hasn't been set; default to the slowest one. */
 374                 devc->cur_samplerate = samplerates[0];
 375         }
 376
 377         return SR_OK;
 378 }
 379
 380 static int dev_close(struct sr_dev_inst *sdi)
 381 {
 382         struct sr_usb_dev_inst *usb;
 383
 384         usb = sdi->conn;
 385
 386         if (!usb->devhdl)
 387                 return SR_ERR_BUG;
 388
 389         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 390                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 391         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 392         libusb_close(usb->devhdl);
 393         usb->devhdl = NULL;
 394
 395         return SR_OK;
 396 }
 397
 398 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 399                 const struct sr_channel_group *cg)
 400 {
 401         struct dev_context *devc;
 402         struct sr_usb_dev_inst *usb;
 403         GVariant *range[2];
 404         char str[128];
 405         int ret;
 406         unsigned int i;
 407
 408         (void)cg;
 409
 410         ret = SR_OK;
 411         switch (key) {
 412         case SR_CONF_CONN:
 413                 if (!sdi || !sdi->conn)
 414                         return SR_ERR_ARG;
 415                 usb = sdi->conn;
 416                 if (usb->address == 255)
 417                         /* Device still needs to re-enumerate after firmware
 418                          * upload, so we don't know its (future) address. */
 419                         return SR_ERR;
 420                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 421                 *data = g_variant_new_string(str);
 422                 break;
 423         case SR_CONF_SAMPLERATE:
 424                 if (!sdi)
 425                         return SR_ERR;
 426                 devc = sdi->priv;
 427                 *data = g_variant_new_uint64(devc->cur_samplerate);
 428                 break;
 429         case SR_CONF_CAPTURE_RATIO:
 430                 if (!sdi)
 431                         return SR_ERR;
 432                 devc = sdi->priv;
 433                 *data = g_variant_new_uint64(devc->capture_ratio);
 434                 break;
 435         case SR_CONF_VOLTAGE_THRESHOLD:
 436                 if (!sdi)
 437                         return SR_ERR;
 438                 devc = sdi->priv;
 439                 ret = SR_ERR;
 440                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 441                         if (devc->selected_voltage_range !=
 442                             volt_thresholds[i].range)
 443                                 continue;
 444                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 445                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 446                         *data = g_variant_new_tuple(range, 2);
 447                         ret = SR_OK;
 448                         break;
 449                 }
 450                 break;
 451         default:
 452                 return SR_ERR_NA;
 453         }
 454
 455         return ret;
 456 }
 457
 458 static int config_set(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         gdouble low, high;
 463         int ret;
 464         unsigned int i;
 465
 466         (void)cg;
 467
 468         devc = sdi->priv;
 469
 470         ret = SR_OK;
 471         switch (key) {
 472         case SR_CONF_SAMPLERATE:
 473                 devc->cur_samplerate = g_variant_get_uint64(data);
 474                 break;
 475         case SR_CONF_LIMIT_SAMPLES:
 476                 devc->limit_samples = g_variant_get_uint64(data);
 477                 break;
 478         case SR_CONF_CAPTURE_RATIO:
 479                 devc->capture_ratio = g_variant_get_uint64(data);
 480                 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
 481                 break;
 482         case SR_CONF_VOLTAGE_THRESHOLD:
 483                 g_variant_get(data, "(dd)", &low, &high);
 484                 ret = SR_ERR_ARG;
 485                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 486                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 487                             fabs(volt_thresholds[i].high - high) < 0.1) {
 488                                 devc->selected_voltage_range =
 489                                         volt_thresholds[i].range;
 490                                 ret = SR_OK;
 491                                 break;
 492                         }
 493                 }
 494                 break;
 495         default:
 496                 ret = SR_ERR_NA;
 497         }
 498
 499         return ret;
 500 }
 501
 502 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 503                 const struct sr_channel_group *cg)
 504 {
 505         GVariant *gvar, *range[2];
 506         GVariantBuilder gvb;
 507         unsigned int i;
 508
 509         switch (key) {
 510         case SR_CONF_SCAN_OPTIONS:
 511         case SR_CONF_DEVICE_OPTIONS:
 512                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 513         case SR_CONF_SAMPLERATE:
 514                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 515                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 516                         samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 517                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 518                 *data = g_variant_builder_end(&gvb);
 519                 break;
 520         case SR_CONF_VOLTAGE_THRESHOLD:
 521                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 522                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 523                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 524                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 525                         gvar = g_variant_new_tuple(range, 2);
 526                         g_variant_builder_add_value(&gvb, gvar);
 527                 }
 528                 *data = g_variant_builder_end(&gvb);
 529                 break;
 530         case SR_CONF_TRIGGER_MATCH:
 531                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 532                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 533                                 sizeof(int32_t));
 534                 break;
 535         default:
 536                 return SR_ERR_NA;
 537         }
 538
 539         return SR_OK;
 540 }
 541
 542 static void abort_acquisition(struct dev_context *devc)
 543 {
 544         int i;
 545
 546         devc->sent_samples = -1;
 547
 548         for (i = devc->num_transfers - 1; i >= 0; i--) {
 549                 if (devc->transfers[i])
 550                         libusb_cancel_transfer(devc->transfers[i]);
 551         }
 552 }
 553
 554 static unsigned int bytes_per_ms(struct dev_context *devc)
 555 {
 556         return devc->cur_samplerate * devc->num_channels / 8000;
 557 }
 558
 559 static size_t get_buffer_size(struct dev_context *devc)
 560 {
 561         size_t s;
 562
 563         /*
 564          * The buffer should be large enough to hold 10ms of data and
 565          * a multiple of 512.
 566          */
 567         s = 10 * bytes_per_ms(devc);
 568         return (s + 511) & ~511;
 569 }
 570
 571 static unsigned int get_number_of_transfers(struct dev_context *devc)
 572 {
 573         unsigned int n;
 574
 575         /* Total buffer size should be able to hold about 500ms of data. */
 576         n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
 577
 578         if (n > NUM_SIMUL_TRANSFERS)
 579                 return NUM_SIMUL_TRANSFERS;
 580
 581         return n;
 582 }
 583
 584 static unsigned int get_timeout(struct dev_context *devc)
 585 {
 586         size_t total_size;
 587         unsigned int timeout;
 588
 589         total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
 590         timeout = total_size / bytes_per_ms(devc);
 591         return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
 592 }
 593
 594 static int configure_channels(const struct sr_dev_inst *sdi)
 595 {
 596         struct dev_context *devc;
 597         struct sr_channel *ch;
 598         GSList *l;
 599         uint16_t channel_bit;
 600
 601         devc = sdi->priv;
 602
 603         devc->cur_channels = 0;
 604         devc->num_channels = 0;
 605         for (l = sdi->channels; l; l = l->next) {
 606                 ch = (struct sr_channel *)l->data;
 607                 if (ch->enabled == FALSE)
 608                         continue;
 609
 610                 channel_bit = 1 << (ch->index);
 611
 612                 devc->cur_channels |= channel_bit;
 613
 614 #ifdef WORDS_BIGENDIAN
 615                 /*
 616                  * Output logic data should be stored in little endian format.
 617                  * To speed things up during conversion, do the switcharoo
 618                  * here instead.
 619                  */
 620                 channel_bit = 1 << (ch->index ^ 8);
 621 #endif
 622
 623                 devc->channel_masks[devc->num_channels++] = channel_bit;
 624         }
 625
 626         return SR_OK;
 627 }
 628
 629 static int receive_data(int fd, int revents, void *cb_data)
 630 {
 631         struct timeval tv;
 632         struct dev_context *devc;
 633         struct drv_context *drvc;
 634         const struct sr_dev_inst *sdi;
 635         struct sr_dev_driver *di;
 636
 637         (void)fd;
 638         (void)revents;
 639
 640         sdi = cb_data;
 641         di = sdi->driver;
 642         drvc = di->context;
 643         devc = sdi->priv;
 644
 645         tv.tv_sec = tv.tv_usec = 0;
 646         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 647
 648         if (devc->sent_samples == -2) {
 649                 logic16_abort_acquisition(sdi);
 650                 abort_acquisition(devc);
 651         }
 652
 653         return TRUE;
 654 }
 655
 656 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 657 {
 658         struct sr_dev_driver *di = sdi->driver;
 659         struct dev_context *devc;
 660         struct drv_context *drvc;
 661         struct sr_usb_dev_inst *usb;
 662         struct sr_trigger *trigger;
 663         struct libusb_transfer *transfer;
 664         unsigned int i, timeout, num_transfers;
 665         int ret;
 666         unsigned char *buf;
 667         size_t size, convsize;
 668
 669         drvc = di->context;
 670         devc = sdi->priv;
 671         usb = sdi->conn;
 672
 673         /* Configures devc->cur_channels. */
 674         if (configure_channels(sdi) != SR_OK) {
 675                 sr_err("Failed to configure channels.");
 676                 return SR_ERR;
 677         }
 678
 679         devc->sent_samples = 0;
 680         devc->empty_transfer_count = 0;
 681         devc->cur_channel = 0;
 682         memset(devc->channel_data, 0, sizeof(devc->channel_data));
 683
 684         if ((trigger = sr_session_trigger_get(sdi->session))) {
 685                 int pre_trigger_samples = 0;
 686                 if (devc->limit_samples > 0)
 687                         pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
 688                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 689                 if (!devc->stl)
 690                         return SR_ERR_MALLOC;
 691                 devc->trigger_fired = FALSE;
 692         } else
 693                 devc->trigger_fired = TRUE;
 694
 695         timeout = get_timeout(devc);
 696         num_transfers = get_number_of_transfers(devc);
 697         size = get_buffer_size(devc);
 698         convsize = (size / devc->num_channels + 2) * 16;
 699         devc->submitted_transfers = 0;
 700
 701         devc->convbuffer_size = convsize;
 702         if (!(devc->convbuffer = g_try_malloc(convsize))) {
 703                 sr_err("Conversion buffer malloc failed.");
 704                 return SR_ERR_MALLOC;
 705         }
 706
 707         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 708         if (!devc->transfers) {
 709                 sr_err("USB transfers malloc failed.");
 710                 g_free(devc->convbuffer);
 711                 return SR_ERR_MALLOC;
 712         }
 713
 714         if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
 715                                              devc->cur_channels)) != SR_OK) {
 716                 g_free(devc->transfers);
 717                 g_free(devc->convbuffer);
 718                 return ret;
 719         }
 720
 721         devc->num_transfers = num_transfers;
 722         for (i = 0; i < num_transfers; i++) {
 723                 if (!(buf = g_try_malloc(size))) {
 724                         sr_err("USB transfer buffer malloc failed.");
 725                         if (devc->submitted_transfers)
 726                                 abort_acquisition(devc);
 727                         else {
 728                                 g_free(devc->transfers);
 729                                 g_free(devc->convbuffer);
 730                         }
 731                         return SR_ERR_MALLOC;
 732                 }
 733                 transfer = libusb_alloc_transfer(0);
 734                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 735                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 736                                 logic16_receive_transfer, (void *)sdi, timeout);
 737                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 738                         sr_err("Failed to submit transfer: %s.",
 739                                libusb_error_name(ret));
 740                         libusb_free_transfer(transfer);
 741                         g_free(buf);
 742                         abort_acquisition(devc);
 743                         return SR_ERR;
 744                 }
 745                 devc->transfers[i] = transfer;
 746                 devc->submitted_transfers++;
 747         }
 748
 749         devc->ctx = drvc->sr_ctx;
 750
 751         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
 752
 753         std_session_send_df_header(sdi);
 754
 755         if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
 756                 abort_acquisition(devc);
 757                 return ret;
 758         }
 759
 760         return SR_OK;
 761 }
 762
 763 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 764 {
 765         int ret;
 766
 767         ret = logic16_abort_acquisition(sdi);
 768
 769         abort_acquisition(sdi->priv);
 770
 771         return ret;
 772 }
 773
 774 static struct sr_dev_driver saleae_logic16_driver_info = {
 775         .name = "saleae-logic16",
 776         .longname = "Saleae Logic16",
 777         .api_version = 1,
 778         .init = std_init,
 779         .cleanup = std_cleanup,
 780         .scan = scan,
 781         .dev_list = std_dev_list,
 782         .dev_clear = std_dev_clear,
 783         .config_get = config_get,
 784         .config_set = config_set,
 785         .config_list = config_list,
 786         .dev_open = dev_open,
 787         .dev_close = dev_close,
 788         .dev_acquisition_start = dev_acquisition_start,
 789         .dev_acquisition_stop = dev_acquisition_stop,
 790         .context = NULL,
 791 };
 792 SR_REGISTER_DEV_DRIVER(saleae_logic16_driver_info);