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 devopts[] = {
  47         SR_CONF_LOGIC_ANALYZER,
  48         SR_CONF_CONTINUOUS,
  49         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  50         SR_CONF_CONN | SR_CONF_GET,
  51         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  52         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  53         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  54         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  55 };
  56
  57 static const int32_t soft_trigger_matches[] = {
  58         SR_TRIGGER_ZERO,
  59         SR_TRIGGER_ONE,
  60         SR_TRIGGER_RISING,
  61         SR_TRIGGER_FALLING,
  62         SR_TRIGGER_EDGE,
  63 };
  64
  65 static const char *channel_names[] = {
  66         "0", "1", "2", "3", "4", "5", "6", "7", "8",
  67         "9", "10", "11", "12", "13", "14", "15",
  68 };
  69
  70 static const struct {
  71         enum voltage_range range;
  72         gdouble low;
  73         gdouble high;
  74 } volt_thresholds[] = {
  75         { VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
  76         { VOLTAGE_RANGE_5_V,     1.4, 3.6 },
  77 };
  78
  79 static const uint64_t samplerates[] = {
  80         SR_KHZ(500),
  81         SR_MHZ(1),
  82         SR_MHZ(2),
  83         SR_MHZ(4),
  84         SR_MHZ(5),
  85         SR_MHZ(8),
  86         SR_MHZ(10),
  87         SR_KHZ(12500),
  88         SR_MHZ(16),
  89         SR_MHZ(20),
  90         SR_MHZ(25),
  91         SR_MHZ(32),
  92         SR_MHZ(40),
  93         SR_MHZ(50),
  94         SR_MHZ(80),
  95         SR_MHZ(100),
  96 };
  97
  98 static gboolean check_conf_profile(libusb_device *dev)
  99 {
 100         struct libusb_device_descriptor des;
 101         struct libusb_device_handle *hdl;
 102         gboolean ret;
 103         unsigned char strdesc[64];
 104
 105         hdl = NULL;
 106         ret = FALSE;
 107         while (!ret) {
 108                 /* Assume the FW has not been loaded, unless proven wrong. */
 109                 libusb_get_device_descriptor(dev, &des);
 110
 111                 if (libusb_open(dev, &hdl) != 0)
 112                         break;
 113
 114                 if (libusb_get_string_descriptor_ascii(hdl,
 115                     des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
 116                         break;
 117                 if (strcmp((const char *)strdesc, "Saleae LLC"))
 118                         break;
 119
 120                 if (libusb_get_string_descriptor_ascii(hdl,
 121                     des.iProduct, strdesc, sizeof(strdesc)) < 0)
 122                         break;
 123                 if (strcmp((const char *)strdesc, "Logic S/16"))
 124                         break;
 125
 126                 /* If we made it here, it must be a configured Logic16. */
 127                 ret = TRUE;
 128         }
 129         if (hdl)
 130                 libusb_close(hdl);
 131
 132         return ret;
 133 }
 134
 135 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 136 {
 137         struct drv_context *drvc;
 138         struct dev_context *devc;
 139         struct sr_dev_inst *sdi;
 140         struct sr_usb_dev_inst *usb;
 141         struct sr_config *src;
 142         GSList *l, *devices, *conn_devices;
 143         struct libusb_device_descriptor des;
 144         libusb_device **devlist;
 145         unsigned int i, j;
 146         const char *conn;
 147         char connection_id[64];
 148
 149         drvc = di->context;
 150
 151         conn = NULL;
 152         for (l = options; l; l = l->next) {
 153                 src = l->data;
 154                 switch (src->key) {
 155                 case SR_CONF_CONN:
 156                         conn = g_variant_get_string(src->data, NULL);
 157                         break;
 158                 }
 159         }
 160         if (conn)
 161                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 162         else
 163                 conn_devices = NULL;
 164
 165         /* Find all Logic16 devices and upload firmware to them. */
 166         devices = NULL;
 167         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 168         for (i = 0; devlist[i]; i++) {
 169                 if (conn) {
 170                         usb = NULL;
 171                         for (l = conn_devices; l; l = l->next) {
 172                                 usb = l->data;
 173                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 174                                     && usb->address == libusb_get_device_address(devlist[i]))
 175                                         break;
 176                         }
 177                         if (!l)
 178                                 /* This device matched none of the ones that
 179                                  * matched the conn specification. */
 180                                 continue;
 181                 }
 182
 183                 libusb_get_device_descriptor(devlist[i], &des);
 184
 185                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 186
 187                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 188                         continue;
 189
 190                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 191                 sdi->status = SR_ST_INITIALIZING;
 192                 sdi->vendor = g_strdup("Saleae");
 193                 sdi->model = g_strdup("Logic16");
 194                 sdi->connection_id = g_strdup(connection_id);
 195
 196                 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
 197                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 198                                         channel_names[j]);
 199
 200                 devc = g_malloc0(sizeof(struct dev_context));
 201                 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
 202                 sdi->priv = devc;
 203                 devices = g_slist_append(devices, sdi);
 204
 205                 if (check_conf_profile(devlist[i])) {
 206                         /* Already has the firmware, so fix the new address. */
 207                         sr_dbg("Found a Logic16 device.");
 208                         sdi->status = SR_ST_INACTIVE;
 209                         sdi->inst_type = SR_INST_USB;
 210                         sdi->conn = sr_usb_dev_inst_new(
 211                                 libusb_get_bus_number(devlist[i]),
 212                                 libusb_get_device_address(devlist[i]), NULL);
 213                 } else {
 214                         if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 215                                         USB_CONFIGURATION, FX2_FIRMWARE) == SR_OK)
 216                                 /* Store when this device's FW was updated. */
 217                                 devc->fw_updated = g_get_monotonic_time();
 218                         else
 219                                 sr_err("Firmware upload failed.");
 220                         sdi->inst_type = SR_INST_USB;
 221                         sdi->conn = sr_usb_dev_inst_new(
 222                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 223                 }
 224         }
 225         libusb_free_device_list(devlist, 1);
 226         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 227
 228         return std_scan_complete(di, devices);
 229 }
 230
 231 static int logic16_dev_open(struct sr_dev_inst *sdi)
 232 {
 233         struct sr_dev_driver *di;
 234         libusb_device **devlist;
 235         struct sr_usb_dev_inst *usb;
 236         struct libusb_device_descriptor des;
 237         struct drv_context *drvc;
 238         int ret, i, device_count;
 239         char connection_id[64];
 240
 241         di = sdi->driver;
 242         drvc = di->context;
 243         usb = sdi->conn;
 244
 245         if (sdi->status == SR_ST_ACTIVE)
 246                 /* Device is already in use. */
 247                 return SR_ERR;
 248
 249         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 250         if (device_count < 0) {
 251                 sr_err("Failed to get device list: %s.",
 252                        libusb_error_name(device_count));
 253                 return SR_ERR;
 254         }
 255
 256         for (i = 0; i < device_count; i++) {
 257                 libusb_get_device_descriptor(devlist[i], &des);
 258
 259                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 260                         continue;
 261
 262                 if ((sdi->status == SR_ST_INITIALIZING) ||
 263                                 (sdi->status == SR_ST_INACTIVE)) {
 264                         /*
 265                          * Check device by its physical USB bus/port address.
 266                          */
 267                         usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 268                         if (strcmp(sdi->connection_id, connection_id))
 269                                 /* This is not the one. */
 270                                 continue;
 271                 }
 272
 273                 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
 274                         if (usb->address == 0xff)
 275                                 /*
 276                                  * First time we touch this device after FW
 277                                  * upload, so we don't know the address yet.
 278                                  */
 279                                 usb->address = libusb_get_device_address(devlist[i]);
 280                 } else {
 281                         sr_err("Failed to open device: %s.",
 282                                libusb_error_name(ret));
 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                         break;
 291                 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 292                         sr_err("Device has been disconnected.");
 293                         break;
 294                 } else if (ret != 0) {
 295                         sr_err("Unable to claim interface: %s.",
 296                                libusb_error_name(ret));
 297                         break;
 298                 }
 299
 300                 if ((ret = logic16_init_device(sdi)) != SR_OK) {
 301                         sr_err("Failed to init device.");
 302                         break;
 303                 }
 304
 305                 sdi->status = SR_ST_ACTIVE;
 306                 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
 307                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 308
 309                 break;
 310         }
 311         libusb_free_device_list(devlist, 1);
 312
 313         if (sdi->status != SR_ST_ACTIVE) {
 314                 if (usb->devhdl) {
 315                         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 316                         libusb_close(usb->devhdl);
 317                         usb->devhdl = NULL;
 318                 }
 319                 return SR_ERR;
 320         }
 321
 322         return SR_OK;
 323 }
 324
 325 static int dev_open(struct sr_dev_inst *sdi)
 326 {
 327         struct dev_context *devc;
 328         int ret;
 329         int64_t timediff_us, timediff_ms;
 330
 331         devc = sdi->priv;
 332
 333         /*
 334          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 335          * milliseconds for the FX2 to renumerate.
 336          */
 337         ret = SR_ERR;
 338         if (devc->fw_updated > 0) {
 339                 sr_info("Waiting for device to reset.");
 340                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 341                 g_usleep(300 * 1000);
 342                 timediff_ms = 0;
 343                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 344                         if ((ret = logic16_dev_open(sdi)) == SR_OK)
 345                                 break;
 346                         g_usleep(100 * 1000);
 347
 348                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 349                         timediff_ms = timediff_us / 1000;
 350                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 351                 }
 352                 if (ret != SR_OK) {
 353                         sr_err("Device failed to renumerate.");
 354                         return SR_ERR;
 355                 }
 356                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 357         } else {
 358                 sr_info("Firmware upload was not needed.");
 359                 ret = logic16_dev_open(sdi);
 360         }
 361
 362         if (ret != SR_OK) {
 363                 sr_err("Unable to open device.");
 364                 return SR_ERR;
 365         }
 366
 367         if (devc->cur_samplerate == 0) {
 368                 /* Samplerate hasn't been set; default to the slowest one. */
 369                 devc->cur_samplerate = samplerates[0];
 370         }
 371
 372         return SR_OK;
 373 }
 374
 375 static int dev_close(struct sr_dev_inst *sdi)
 376 {
 377         struct sr_usb_dev_inst *usb;
 378
 379         usb = sdi->conn;
 380         if (!usb->devhdl)
 381                 return SR_ERR;
 382
 383         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 384                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 385         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 386         libusb_close(usb->devhdl);
 387         usb->devhdl = NULL;
 388         sdi->status = SR_ST_INACTIVE;
 389
 390         return SR_OK;
 391 }
 392
 393 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 394                 const struct sr_channel_group *cg)
 395 {
 396         struct dev_context *devc;
 397         struct sr_usb_dev_inst *usb;
 398         GVariant *range[2];
 399         char str[128];
 400         int ret;
 401         unsigned int i;
 402
 403         (void)cg;
 404
 405         ret = SR_OK;
 406         switch (key) {
 407         case SR_CONF_CONN:
 408                 if (!sdi || !sdi->conn)
 409                         return SR_ERR_ARG;
 410                 usb = sdi->conn;
 411                 if (usb->address == 255)
 412                         /* Device still needs to re-enumerate after firmware
 413                          * upload, so we don't know its (future) address. */
 414                         return SR_ERR;
 415                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 416                 *data = g_variant_new_string(str);
 417                 break;
 418         case SR_CONF_SAMPLERATE:
 419                 if (!sdi)
 420                         return SR_ERR;
 421                 devc = sdi->priv;
 422                 *data = g_variant_new_uint64(devc->cur_samplerate);
 423                 break;
 424         case SR_CONF_CAPTURE_RATIO:
 425                 if (!sdi)
 426                         return SR_ERR;
 427                 devc = sdi->priv;
 428                 *data = g_variant_new_uint64(devc->capture_ratio);
 429                 break;
 430         case SR_CONF_VOLTAGE_THRESHOLD:
 431                 if (!sdi)
 432                         return SR_ERR;
 433                 devc = sdi->priv;
 434                 ret = SR_ERR;
 435                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 436                         if (devc->selected_voltage_range !=
 437                             volt_thresholds[i].range)
 438                                 continue;
 439                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 440                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 441                         *data = g_variant_new_tuple(range, 2);
 442                         ret = SR_OK;
 443                         break;
 444                 }
 445                 break;
 446         default:
 447                 return SR_ERR_NA;
 448         }
 449
 450         return ret;
 451 }
 452
 453 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 454                 const struct sr_channel_group *cg)
 455 {
 456         struct dev_context *devc;
 457         gdouble low, high;
 458         int ret;
 459         unsigned int i;
 460
 461         (void)cg;
 462
 463         devc = sdi->priv;
 464
 465         ret = SR_OK;
 466         switch (key) {
 467         case SR_CONF_SAMPLERATE:
 468                 devc->cur_samplerate = g_variant_get_uint64(data);
 469                 break;
 470         case SR_CONF_LIMIT_SAMPLES:
 471                 devc->limit_samples = g_variant_get_uint64(data);
 472                 break;
 473         case SR_CONF_CAPTURE_RATIO:
 474                 devc->capture_ratio = g_variant_get_uint64(data);
 475                 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
 476                 break;
 477         case SR_CONF_VOLTAGE_THRESHOLD:
 478                 g_variant_get(data, "(dd)", &low, &high);
 479                 ret = SR_ERR_ARG;
 480                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 481                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 482                             fabs(volt_thresholds[i].high - high) < 0.1) {
 483                                 devc->selected_voltage_range =
 484                                         volt_thresholds[i].range;
 485                                 ret = SR_OK;
 486                                 break;
 487                         }
 488                 }
 489                 break;
 490         default:
 491                 ret = SR_ERR_NA;
 492         }
 493
 494         return ret;
 495 }
 496
 497 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 498                 const struct sr_channel_group *cg)
 499 {
 500         GVariant *gvar, *range[2];
 501         GVariantBuilder gvb;
 502         int ret;
 503         unsigned int i;
 504
 505         (void)sdi;
 506         (void)cg;
 507
 508         ret = SR_OK;
 509         switch (key) {
 510         case SR_CONF_SCAN_OPTIONS:
 511                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 512                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 513                 break;
 514         case SR_CONF_DEVICE_OPTIONS:
 515                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 516                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 517                 break;
 518         case SR_CONF_SAMPLERATE:
 519                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 520                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 521                         samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 522                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 523                 *data = g_variant_builder_end(&gvb);
 524                 break;
 525         case SR_CONF_VOLTAGE_THRESHOLD:
 526                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 527                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 528                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 529                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 530                         gvar = g_variant_new_tuple(range, 2);
 531                         g_variant_builder_add_value(&gvb, gvar);
 532                 }
 533                 *data = g_variant_builder_end(&gvb);
 534                 break;
 535         case SR_CONF_TRIGGER_MATCH:
 536                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 537                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 538                                 sizeof(int32_t));
 539                 break;
 540         default:
 541                 return SR_ERR_NA;
 542         }
 543
 544         return ret;
 545 }
 546
 547 static void abort_acquisition(struct dev_context *devc)
 548 {
 549         int i;
 550
 551         devc->sent_samples = -1;
 552
 553         for (i = devc->num_transfers - 1; i >= 0; i--) {
 554                 if (devc->transfers[i])
 555                         libusb_cancel_transfer(devc->transfers[i]);
 556         }
 557 }
 558
 559 static unsigned int bytes_per_ms(struct dev_context *devc)
 560 {
 561         return devc->cur_samplerate * devc->num_channels / 8000;
 562 }
 563
 564 static size_t get_buffer_size(struct dev_context *devc)
 565 {
 566         size_t s;
 567
 568         /*
 569          * The buffer should be large enough to hold 10ms of data and
 570          * a multiple of 512.
 571          */
 572         s = 10 * bytes_per_ms(devc);
 573         return (s + 511) & ~511;
 574 }
 575
 576 static unsigned int get_number_of_transfers(struct dev_context *devc)
 577 {
 578         unsigned int n;
 579
 580         /* Total buffer size should be able to hold about 500ms of data. */
 581         n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
 582
 583         if (n > NUM_SIMUL_TRANSFERS)
 584                 return NUM_SIMUL_TRANSFERS;
 585
 586         return n;
 587 }
 588
 589 static unsigned int get_timeout(struct dev_context *devc)
 590 {
 591         size_t total_size;
 592         unsigned int timeout;
 593
 594         total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
 595         timeout = total_size / bytes_per_ms(devc);
 596         return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
 597 }
 598
 599 static int configure_channels(const struct sr_dev_inst *sdi)
 600 {
 601         struct dev_context *devc;
 602         struct sr_channel *ch;
 603         GSList *l;
 604         uint16_t channel_bit;
 605
 606         devc = sdi->priv;
 607
 608         devc->cur_channels = 0;
 609         devc->num_channels = 0;
 610         for (l = sdi->channels; l; l = l->next) {
 611                 ch = (struct sr_channel *)l->data;
 612                 if (ch->enabled == FALSE)
 613                         continue;
 614
 615                 channel_bit = 1 << (ch->index);
 616
 617                 devc->cur_channels |= channel_bit;
 618
 619 #ifdef WORDS_BIGENDIAN
 620                 /*
 621                  * Output logic data should be stored in little endian format.
 622                  * To speed things up during conversion, do the switcharoo
 623                  * here instead.
 624                  */
 625                 channel_bit = 1 << (ch->index ^ 8);
 626 #endif
 627
 628                 devc->channel_masks[devc->num_channels++] = channel_bit;
 629         }
 630
 631         return SR_OK;
 632 }
 633
 634 static int receive_data(int fd, int revents, void *cb_data)
 635 {
 636         struct timeval tv;
 637         struct dev_context *devc;
 638         struct drv_context *drvc;
 639         const struct sr_dev_inst *sdi;
 640         struct sr_dev_driver *di;
 641
 642         (void)fd;
 643         (void)revents;
 644
 645         sdi = cb_data;
 646         di = sdi->driver;
 647         drvc = di->context;
 648         devc = sdi->priv;
 649
 650         tv.tv_sec = tv.tv_usec = 0;
 651         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 652
 653         if (devc->sent_samples == -2) {
 654                 logic16_abort_acquisition(sdi);
 655                 abort_acquisition(devc);
 656         }
 657
 658         return TRUE;
 659 }
 660
 661 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 662 {
 663         struct sr_dev_driver *di = sdi->driver;
 664         struct dev_context *devc;
 665         struct drv_context *drvc;
 666         struct sr_usb_dev_inst *usb;
 667         struct sr_trigger *trigger;
 668         struct libusb_transfer *transfer;
 669         unsigned int i, timeout, num_transfers;
 670         int ret;
 671         unsigned char *buf;
 672         size_t size, convsize;
 673
 674         drvc = di->context;
 675         devc = sdi->priv;
 676         usb = sdi->conn;
 677
 678         /* Configures devc->cur_channels. */
 679         if (configure_channels(sdi) != SR_OK) {
 680                 sr_err("Failed to configure channels.");
 681                 return SR_ERR;
 682         }
 683
 684         devc->sent_samples = 0;
 685         devc->empty_transfer_count = 0;
 686         devc->cur_channel = 0;
 687         memset(devc->channel_data, 0, sizeof(devc->channel_data));
 688
 689         if ((trigger = sr_session_trigger_get(sdi->session))) {
 690                 int pre_trigger_samples = 0;
 691                 if (devc->limit_samples > 0)
 692                         pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
 693                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 694                 if (!devc->stl)
 695                         return SR_ERR_MALLOC;
 696                 devc->trigger_fired = FALSE;
 697         } else
 698                 devc->trigger_fired = TRUE;
 699
 700         timeout = get_timeout(devc);
 701         num_transfers = get_number_of_transfers(devc);
 702         size = get_buffer_size(devc);
 703         convsize = (size / devc->num_channels + 2) * 16;
 704         devc->submitted_transfers = 0;
 705
 706         devc->convbuffer_size = convsize;
 707         if (!(devc->convbuffer = g_try_malloc(convsize))) {
 708                 sr_err("Conversion buffer malloc failed.");
 709                 return SR_ERR_MALLOC;
 710         }
 711
 712         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 713         if (!devc->transfers) {
 714                 sr_err("USB transfers malloc failed.");
 715                 g_free(devc->convbuffer);
 716                 return SR_ERR_MALLOC;
 717         }
 718
 719         if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
 720                                              devc->cur_channels)) != SR_OK) {
 721                 g_free(devc->transfers);
 722                 g_free(devc->convbuffer);
 723                 return ret;
 724         }
 725
 726         devc->num_transfers = num_transfers;
 727         for (i = 0; i < num_transfers; i++) {
 728                 if (!(buf = g_try_malloc(size))) {
 729                         sr_err("USB transfer buffer malloc failed.");
 730                         if (devc->submitted_transfers)
 731                                 abort_acquisition(devc);
 732                         else {
 733                                 g_free(devc->transfers);
 734                                 g_free(devc->convbuffer);
 735                         }
 736                         return SR_ERR_MALLOC;
 737                 }
 738                 transfer = libusb_alloc_transfer(0);
 739                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 740                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 741                                 logic16_receive_transfer, (void *)sdi, timeout);
 742                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 743                         sr_err("Failed to submit transfer: %s.",
 744                                libusb_error_name(ret));
 745                         libusb_free_transfer(transfer);
 746                         g_free(buf);
 747                         abort_acquisition(devc);
 748                         return SR_ERR;
 749                 }
 750                 devc->transfers[i] = transfer;
 751                 devc->submitted_transfers++;
 752         }
 753
 754         devc->ctx = drvc->sr_ctx;
 755
 756         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
 757
 758         std_session_send_df_header(sdi);
 759
 760         if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
 761                 abort_acquisition(devc);
 762                 return ret;
 763         }
 764
 765         return SR_OK;
 766 }
 767
 768 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 769 {
 770         int ret;
 771
 772         ret = logic16_abort_acquisition(sdi);
 773
 774         abort_acquisition(sdi->priv);
 775
 776         return ret;
 777 }
 778
 779 static struct sr_dev_driver saleae_logic16_driver_info = {
 780         .name = "saleae-logic16",
 781         .longname = "Saleae Logic16",
 782         .api_version = 1,
 783         .init = std_init,
 784         .cleanup = std_cleanup,
 785         .scan = scan,
 786         .dev_list = std_dev_list,
 787         .dev_clear = NULL,
 788         .config_get = config_get,
 789         .config_set = config_set,
 790         .config_list = config_list,
 791         .dev_open = dev_open,
 792         .dev_close = dev_close,
 793         .dev_acquisition_start = dev_acquisition_start,
 794         .dev_acquisition_stop = dev_acquisition_stop,
 795         .context = NULL,
 796 };
 797 SR_REGISTER_DEV_DRIVER(saleae_logic16_driver_info);