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 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info;
  43
  44 static const uint32_t scanopts[] = {
  45         SR_CONF_CONN,
  46 };
  47
  48 static const uint32_t devopts[] = {
  49         SR_CONF_LOGIC_ANALYZER,
  50         SR_CONF_CONTINUOUS,
  51         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  52         SR_CONF_CONN | SR_CONF_GET,
  53         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  54         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  55         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  56         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  57 };
  58
  59 static const int32_t soft_trigger_matches[] = {
  60         SR_TRIGGER_ZERO,
  61         SR_TRIGGER_ONE,
  62         SR_TRIGGER_RISING,
  63         SR_TRIGGER_FALLING,
  64         SR_TRIGGER_EDGE,
  65 };
  66
  67 static const char *channel_names[] = {
  68         "0", "1", "2", "3", "4", "5", "6", "7", "8",
  69         "9", "10", "11", "12", "13", "14", "15",
  70 };
  71
  72 static const struct {
  73         enum voltage_range range;
  74         gdouble low;
  75         gdouble high;
  76 } volt_thresholds[] = {
  77         { VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
  78         { VOLTAGE_RANGE_5_V,     1.4, 3.6 },
  79 };
  80
  81 static const uint64_t samplerates[] = {
  82         SR_KHZ(500),
  83         SR_MHZ(1),
  84         SR_MHZ(2),
  85         SR_MHZ(4),
  86         SR_MHZ(5),
  87         SR_MHZ(8),
  88         SR_MHZ(10),
  89         SR_KHZ(12500),
  90         SR_MHZ(16),
  91         SR_MHZ(25),
  92         SR_MHZ(32),
  93         SR_MHZ(40),
  94         SR_MHZ(80),
  95         SR_MHZ(100),
  96 };
  97
  98 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  99 {
 100         return std_init(di, sr_ctx, LOG_PREFIX);
 101 }
 102
 103 static gboolean check_conf_profile(libusb_device *dev)
 104 {
 105         struct libusb_device_descriptor des;
 106         struct libusb_device_handle *hdl;
 107         gboolean ret;
 108         unsigned char strdesc[64];
 109
 110         hdl = NULL;
 111         ret = FALSE;
 112         while (!ret) {
 113                 /* Assume the FW has not been loaded, unless proven wrong. */
 114                 libusb_get_device_descriptor(dev, &des);
 115
 116                 if (libusb_open(dev, &hdl) != 0)
 117                         break;
 118
 119                 if (libusb_get_string_descriptor_ascii(hdl,
 120                     des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
 121                         break;
 122                 if (strcmp((const char *)strdesc, "Saleae LLC"))
 123                         break;
 124
 125                 if (libusb_get_string_descriptor_ascii(hdl,
 126                     des.iProduct, strdesc, sizeof(strdesc)) < 0)
 127                         break;
 128                 if (strcmp((const char *)strdesc, "Logic S/16"))
 129                         break;
 130
 131                 /* If we made it here, it must be a configured Logic16. */
 132                 ret = TRUE;
 133         }
 134         if (hdl)
 135                 libusb_close(hdl);
 136
 137         return ret;
 138 }
 139
 140 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 141 {
 142         struct drv_context *drvc;
 143         struct dev_context *devc;
 144         struct sr_dev_inst *sdi;
 145         struct sr_usb_dev_inst *usb;
 146         struct sr_config *src;
 147         GSList *l, *devices, *conn_devices;
 148         struct libusb_device_descriptor des;
 149         libusb_device **devlist;
 150         unsigned int i, j;
 151         const char *conn;
 152         char connection_id[64];
 153
 154         drvc = di->context;
 155
 156         conn = NULL;
 157         for (l = options; l; l = l->next) {
 158                 src = l->data;
 159                 switch (src->key) {
 160                 case SR_CONF_CONN:
 161                         conn = g_variant_get_string(src->data, NULL);
 162                         break;
 163                 }
 164         }
 165         if (conn)
 166                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 167         else
 168                 conn_devices = NULL;
 169
 170         /* Find all Logic16 devices and upload firmware to them. */
 171         devices = NULL;
 172         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 173         for (i = 0; devlist[i]; i++) {
 174                 if (conn) {
 175                         usb = NULL;
 176                         for (l = conn_devices; l; l = l->next) {
 177                                 usb = l->data;
 178                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 179                                     && usb->address == libusb_get_device_address(devlist[i]))
 180                                         break;
 181                         }
 182                         if (!l)
 183                                 /* This device matched none of the ones that
 184                                  * matched the conn specification. */
 185                                 continue;
 186                 }
 187
 188                 libusb_get_device_descriptor(devlist[i], &des);
 189
 190                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 191
 192                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 193                         continue;
 194
 195                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 196                 sdi->status = SR_ST_INITIALIZING;
 197                 sdi->vendor = g_strdup("Saleae");
 198                 sdi->model = g_strdup("Logic16");
 199                 sdi->driver = di;
 200                 sdi->connection_id = g_strdup(connection_id);
 201
 202                 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
 203                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 204                                             channel_names[j]);
 205
 206                 devc = g_malloc0(sizeof(struct dev_context));
 207                 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
 208                 sdi->priv = devc;
 209                 drvc->instances = g_slist_append(drvc->instances, sdi);
 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.");
 227                         sdi->inst_type = SR_INST_USB;
 228                         sdi->conn = sr_usb_dev_inst_new(
 229                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 230                 }
 231         }
 232         libusb_free_device_list(devlist, 1);
 233         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 234
 235         return devices;
 236 }
 237
 238 static int logic16_dev_open(struct sr_dev_inst *sdi)
 239 {
 240         struct sr_dev_driver *di;
 241         libusb_device **devlist;
 242         struct sr_usb_dev_inst *usb;
 243         struct libusb_device_descriptor des;
 244         struct drv_context *drvc;
 245         int ret, i, device_count;
 246         char connection_id[64];
 247
 248         di = sdi->driver;
 249         drvc = di->context;
 250         usb = sdi->conn;
 251
 252         if (sdi->status == SR_ST_ACTIVE)
 253                 /* Device is already in use. */
 254                 return SR_ERR;
 255
 256         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 257         if (device_count < 0) {
 258                 sr_err("Failed to get device list: %s.",
 259                        libusb_error_name(device_count));
 260                 return SR_ERR;
 261         }
 262
 263         for (i = 0; i < device_count; i++) {
 264                 libusb_get_device_descriptor(devlist[i], &des);
 265
 266                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 267                         continue;
 268
 269                 if ((sdi->status == SR_ST_INITIALIZING) ||
 270                                 (sdi->status == SR_ST_INACTIVE)) {
 271                         /*
 272                          * Check device by its physical USB bus/port address.
 273                          */
 274                         usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 275                         if (strcmp(sdi->connection_id, connection_id))
 276                                 /* This is not the one. */
 277                                 continue;
 278                 }
 279
 280                 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
 281                         if (usb->address == 0xff)
 282                                 /*
 283                                  * First time we touch this device after FW
 284                                  * upload, so we don't know the address yet.
 285                                  */
 286                                 usb->address = libusb_get_device_address(devlist[i]);
 287                 } else {
 288                         sr_err("Failed to open device: %s.",
 289                                libusb_error_name(ret));
 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                         break;
 298                 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 299                         sr_err("Device has been disconnected.");
 300                         break;
 301                 } else if (ret != 0) {
 302                         sr_err("Unable to claim interface: %s.",
 303                                libusb_error_name(ret));
 304                         break;
 305                 }
 306
 307                 if ((ret = logic16_init_device(sdi)) != SR_OK) {
 308                         sr_err("Failed to init device.");
 309                         break;
 310                 }
 311
 312                 sdi->status = SR_ST_ACTIVE;
 313                 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
 314                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 315
 316                 break;
 317         }
 318         libusb_free_device_list(devlist, 1);
 319
 320         if (sdi->status != SR_ST_ACTIVE) {
 321                 if (usb->devhdl) {
 322                         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 323                         libusb_close(usb->devhdl);
 324                         usb->devhdl = NULL;
 325                 }
 326                 return SR_ERR;
 327         }
 328
 329         return SR_OK;
 330 }
 331
 332 static int dev_open(struct sr_dev_inst *sdi)
 333 {
 334         struct dev_context *devc;
 335         int ret;
 336         int64_t timediff_us, timediff_ms;
 337
 338         devc = sdi->priv;
 339
 340         /*
 341          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 342          * milliseconds for the FX2 to renumerate.
 343          */
 344         ret = SR_ERR;
 345         if (devc->fw_updated > 0) {
 346                 sr_info("Waiting for device to reset.");
 347                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 348                 g_usleep(300 * 1000);
 349                 timediff_ms = 0;
 350                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 351                         if ((ret = logic16_dev_open(sdi)) == SR_OK)
 352                                 break;
 353                         g_usleep(100 * 1000);
 354
 355                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 356                         timediff_ms = timediff_us / 1000;
 357                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 358                 }
 359                 if (ret != SR_OK) {
 360                         sr_err("Device failed to renumerate.");
 361                         return SR_ERR;
 362                 }
 363                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 364         } else {
 365                 sr_info("Firmware upload was not needed.");
 366                 ret = logic16_dev_open(sdi);
 367         }
 368
 369         if (ret != SR_OK) {
 370                 sr_err("Unable to open device.");
 371                 return SR_ERR;
 372         }
 373
 374         if (devc->cur_samplerate == 0) {
 375                 /* Samplerate hasn't been set; default to the slowest one. */
 376                 devc->cur_samplerate = samplerates[0];
 377         }
 378
 379         return SR_OK;
 380 }
 381
 382 static int dev_close(struct sr_dev_inst *sdi)
 383 {
 384         struct sr_usb_dev_inst *usb;
 385
 386         usb = sdi->conn;
 387         if (!usb->devhdl)
 388                 return SR_ERR;
 389
 390         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 391                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 392         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 393         libusb_close(usb->devhdl);
 394         usb->devhdl = NULL;
 395         sdi->status = SR_ST_INACTIVE;
 396
 397         return SR_OK;
 398 }
 399
 400 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 401                 const struct sr_channel_group *cg)
 402 {
 403         struct dev_context *devc;
 404         struct sr_usb_dev_inst *usb;
 405         GVariant *range[2];
 406         char str[128];
 407         int ret;
 408         unsigned int i;
 409
 410         (void)cg;
 411
 412         ret = SR_OK;
 413         switch (key) {
 414         case SR_CONF_CONN:
 415                 if (!sdi || !sdi->conn)
 416                         return SR_ERR_ARG;
 417                 usb = sdi->conn;
 418                 if (usb->address == 255)
 419                         /* Device still needs to re-enumerate after firmware
 420                          * upload, so we don't know its (future) address. */
 421                         return SR_ERR;
 422                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 423                 *data = g_variant_new_string(str);
 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                 ret = SR_ERR;
 442                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 443                         if (devc->selected_voltage_range !=
 444                             volt_thresholds[i].range)
 445                                 continue;
 446                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 447                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 448                         *data = g_variant_new_tuple(range, 2);
 449                         ret = SR_OK;
 450                         break;
 451                 }
 452                 break;
 453         default:
 454                 return SR_ERR_NA;
 455         }
 456
 457         return ret;
 458 }
 459
 460 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 461                 const struct sr_channel_group *cg)
 462 {
 463         struct dev_context *devc;
 464         gdouble low, high;
 465         int ret;
 466         unsigned int i;
 467
 468         (void)cg;
 469
 470         if (sdi->status != SR_ST_ACTIVE)
 471                 return SR_ERR_DEV_CLOSED;
 472
 473         devc = sdi->priv;
 474
 475         ret = SR_OK;
 476         switch (key) {
 477         case SR_CONF_SAMPLERATE:
 478                 devc->cur_samplerate = g_variant_get_uint64(data);
 479                 break;
 480         case SR_CONF_LIMIT_SAMPLES:
 481                 devc->limit_samples = g_variant_get_uint64(data);
 482                 break;
 483         case SR_CONF_CAPTURE_RATIO:
 484                 devc->capture_ratio = g_variant_get_uint64(data);
 485                 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
 486                 break;
 487         case SR_CONF_VOLTAGE_THRESHOLD:
 488                 g_variant_get(data, "(dd)", &low, &high);
 489                 ret = SR_ERR_ARG;
 490                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 491                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 492                             fabs(volt_thresholds[i].high - high) < 0.1) {
 493                                 devc->selected_voltage_range =
 494                                         volt_thresholds[i].range;
 495                                 ret = SR_OK;
 496                                 break;
 497                         }
 498                 }
 499                 break;
 500         default:
 501                 ret = SR_ERR_NA;
 502         }
 503
 504         return ret;
 505 }
 506
 507 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 508                 const struct sr_channel_group *cg)
 509 {
 510         GVariant *gvar, *range[2];
 511         GVariantBuilder gvb;
 512         int ret;
 513         unsigned int i;
 514
 515         (void)sdi;
 516         (void)cg;
 517
 518         ret = SR_OK;
 519         switch (key) {
 520         case SR_CONF_SCAN_OPTIONS:
 521                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 522                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 523                 break;
 524         case SR_CONF_DEVICE_OPTIONS:
 525                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 526                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 527                 break;
 528         case SR_CONF_SAMPLERATE:
 529                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 530                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 531                         samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 532                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 533                 *data = g_variant_builder_end(&gvb);
 534                 break;
 535         case SR_CONF_VOLTAGE_THRESHOLD:
 536                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 537                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 538                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 539                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 540                         gvar = g_variant_new_tuple(range, 2);
 541                         g_variant_builder_add_value(&gvb, gvar);
 542                 }
 543                 *data = g_variant_builder_end(&gvb);
 544                 break;
 545         case SR_CONF_TRIGGER_MATCH:
 546                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 547                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 548                                 sizeof(int32_t));
 549                 break;
 550         default:
 551                 return SR_ERR_NA;
 552         }
 553
 554         return ret;
 555 }
 556
 557 static void abort_acquisition(struct dev_context *devc)
 558 {
 559         int i;
 560
 561         devc->sent_samples = -1;
 562
 563         for (i = devc->num_transfers - 1; i >= 0; i--) {
 564                 if (devc->transfers[i])
 565                         libusb_cancel_transfer(devc->transfers[i]);
 566         }
 567 }
 568
 569 static unsigned int bytes_per_ms(struct dev_context *devc)
 570 {
 571         return devc->cur_samplerate * devc->num_channels / 8000;
 572 }
 573
 574 static size_t get_buffer_size(struct dev_context *devc)
 575 {
 576         size_t s;
 577
 578         /*
 579          * The buffer should be large enough to hold 10ms of data and
 580          * a multiple of 512.
 581          */
 582         s = 10 * bytes_per_ms(devc);
 583         return (s + 511) & ~511;
 584 }
 585
 586 static unsigned int get_number_of_transfers(struct dev_context *devc)
 587 {
 588         unsigned int n;
 589
 590         /* Total buffer size should be able to hold about 500ms of data. */
 591         n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
 592
 593         if (n > NUM_SIMUL_TRANSFERS)
 594                 return NUM_SIMUL_TRANSFERS;
 595
 596         return n;
 597 }
 598
 599 static unsigned int get_timeout(struct dev_context *devc)
 600 {
 601         size_t total_size;
 602         unsigned int timeout;
 603
 604         total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
 605         timeout = total_size / bytes_per_ms(devc);
 606         return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
 607 }
 608
 609 static int configure_channels(const struct sr_dev_inst *sdi)
 610 {
 611         struct dev_context *devc;
 612         struct sr_channel *ch;
 613         GSList *l;
 614         uint16_t channel_bit;
 615
 616         devc = sdi->priv;
 617
 618         devc->cur_channels = 0;
 619         devc->num_channels = 0;
 620         for (l = sdi->channels; l; l = l->next) {
 621                 ch = (struct sr_channel *)l->data;
 622                 if (ch->enabled == FALSE)
 623                         continue;
 624
 625                 channel_bit = 1 << (ch->index);
 626
 627                 devc->cur_channels |= channel_bit;
 628
 629 #ifdef WORDS_BIGENDIAN
 630                 /*
 631                  * Output logic data should be stored in little endian format.
 632                  * To speed things up during conversion, do the switcharoo
 633                  * here instead.
 634                  */
 635                 channel_bit = 1 << (ch->index ^ 8);
 636 #endif
 637
 638                 devc->channel_masks[devc->num_channels++] = channel_bit;
 639         }
 640
 641         return SR_OK;
 642 }
 643
 644 static int receive_data(int fd, int revents, void *cb_data)
 645 {
 646         struct timeval tv;
 647         struct dev_context *devc;
 648         struct drv_context *drvc;
 649         const struct sr_dev_inst *sdi;
 650         struct sr_dev_driver *di;
 651
 652         (void)fd;
 653         (void)revents;
 654
 655         sdi = cb_data;
 656         di = sdi->driver;
 657         drvc = di->context;
 658         devc = sdi->priv;
 659
 660         tv.tv_sec = tv.tv_usec = 0;
 661         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 662
 663         if (devc->sent_samples == -2) {
 664                 logic16_abort_acquisition(sdi);
 665                 abort_acquisition(devc);
 666         }
 667
 668         return TRUE;
 669 }
 670
 671 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 672 {
 673         struct sr_dev_driver *di = sdi->driver;
 674         struct dev_context *devc;
 675         struct drv_context *drvc;
 676         struct sr_usb_dev_inst *usb;
 677         struct sr_trigger *trigger;
 678         struct libusb_transfer *transfer;
 679         unsigned int i, timeout, num_transfers;
 680         int ret;
 681         unsigned char *buf;
 682         size_t size, convsize;
 683
 684         if (sdi->status != SR_ST_ACTIVE)
 685                 return SR_ERR_DEV_CLOSED;
 686
 687         drvc = di->context;
 688         devc = sdi->priv;
 689         usb = sdi->conn;
 690
 691         /* Configures devc->cur_channels. */
 692         if (configure_channels(sdi) != SR_OK) {
 693                 sr_err("Failed to configure channels.");
 694                 return SR_ERR;
 695         }
 696
 697         devc->sent_samples = 0;
 698         devc->empty_transfer_count = 0;
 699         devc->cur_channel = 0;
 700         memset(devc->channel_data, 0, sizeof(devc->channel_data));
 701
 702         if ((trigger = sr_session_trigger_get(sdi->session))) {
 703                 int pre_trigger_samples = 0;
 704                 if (devc->limit_samples > 0)
 705                         pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
 706                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 707                 if (!devc->stl)
 708                         return SR_ERR_MALLOC;
 709                 devc->trigger_fired = FALSE;
 710         } else
 711                 devc->trigger_fired = TRUE;
 712
 713         timeout = get_timeout(devc);
 714         num_transfers = get_number_of_transfers(devc);
 715         size = get_buffer_size(devc);
 716         convsize = (size / devc->num_channels + 2) * 16;
 717         devc->submitted_transfers = 0;
 718
 719         devc->convbuffer_size = convsize;
 720         if (!(devc->convbuffer = g_try_malloc(convsize))) {
 721                 sr_err("Conversion buffer malloc failed.");
 722                 return SR_ERR_MALLOC;
 723         }
 724
 725         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 726         if (!devc->transfers) {
 727                 sr_err("USB transfers malloc failed.");
 728                 g_free(devc->convbuffer);
 729                 return SR_ERR_MALLOC;
 730         }
 731
 732         if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
 733                                              devc->cur_channels)) != SR_OK) {
 734                 g_free(devc->transfers);
 735                 g_free(devc->convbuffer);
 736                 return ret;
 737         }
 738
 739         devc->num_transfers = num_transfers;
 740         for (i = 0; i < num_transfers; i++) {
 741                 if (!(buf = g_try_malloc(size))) {
 742                         sr_err("USB transfer buffer malloc failed.");
 743                         if (devc->submitted_transfers)
 744                                 abort_acquisition(devc);
 745                         else {
 746                                 g_free(devc->transfers);
 747                                 g_free(devc->convbuffer);
 748                         }
 749                         return SR_ERR_MALLOC;
 750                 }
 751                 transfer = libusb_alloc_transfer(0);
 752                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 753                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 754                                 logic16_receive_transfer, (void *)sdi, timeout);
 755                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 756                         sr_err("Failed to submit transfer: %s.",
 757                                libusb_error_name(ret));
 758                         libusb_free_transfer(transfer);
 759                         g_free(buf);
 760                         abort_acquisition(devc);
 761                         return SR_ERR;
 762                 }
 763                 devc->transfers[i] = transfer;
 764                 devc->submitted_transfers++;
 765         }
 766
 767         devc->ctx = drvc->sr_ctx;
 768
 769         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
 770
 771         std_session_send_df_header(sdi, LOG_PREFIX);
 772
 773         if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
 774                 abort_acquisition(devc);
 775                 return ret;
 776         }
 777
 778         return SR_OK;
 779 }
 780
 781 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 782 {
 783         int ret;
 784
 785         if (sdi->status != SR_ST_ACTIVE)
 786                 return SR_ERR_DEV_CLOSED;
 787
 788         ret = logic16_abort_acquisition(sdi);
 789
 790         abort_acquisition(sdi->priv);
 791
 792         return ret;
 793 }
 794
 795 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = {
 796         .name = "saleae-logic16",
 797         .longname = "Saleae Logic16",
 798         .api_version = 1,
 799         .init = init,
 800         .cleanup = std_cleanup,
 801         .scan = scan,
 802         .dev_list = std_dev_list,
 803         .dev_clear = NULL,
 804         .config_get = config_get,
 805         .config_set = config_set,
 806         .config_list = config_list,
 807         .dev_open = dev_open,
 808         .dev_close = dev_close,
 809         .dev_acquisition_start = dev_acquisition_start,
 810         .dev_acquisition_stop = dev_acquisition_stop,
 811         .context = NULL,
 812 };