src/hardware/kingst-la2016/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2020 Florian Schmidt <schmidt_florian@gmx.de>
   5  * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
   6  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   7  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   8  *
   9  * This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation, either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 /*
  24  * This driver implementation initially was derived from the
  25  * src/hardware/saleae-logic16/ source code.
  26  */
  27
  28 #include <config.h>
  29
  30 #include <libsigrok/libsigrok.h>
  31 #include <string.h>
  32
  33 #include "libsigrok-internal.h"
  34 #include "protocol.h"
  35
  36 /*
  37  * Default device configuration. Must be applicable to any of the
  38  * supported devices (no model specific default values yet). Specific
  39  * firmware implementation details unfortunately won't let us detect
  40  * and keep using previously configured values.
  41  */
  42 #define LA2016_DFLT_SAMPLERATE  SR_MHZ(100)
  43 #define LA2016_DFLT_SAMPLEDEPTH (5 * 1000 * 1000)
  44 #define LA2016_DFLT_CAPT_RATIO  5 /* Capture ratio, in percent. */
  45
  46 static const uint32_t scanopts[] = {
  47         SR_CONF_CONN,
  48 };
  49
  50 static const uint32_t drvopts[] = {
  51         SR_CONF_LOGIC_ANALYZER,
  52 };
  53
  54 static const uint32_t devopts[] = {
  55         /* TODO: SR_CONF_CONTINUOUS, */
  56         SR_CONF_CONN | SR_CONF_GET,
  57         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  58         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  59         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  60         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  61         SR_CONF_LOGIC_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  62         SR_CONF_LOGIC_THRESHOLD_CUSTOM | SR_CONF_GET | SR_CONF_SET,
  63         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  64         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  65 };
  66
  67 static const int32_t trigger_matches[] = {
  68         SR_TRIGGER_ZERO,
  69         SR_TRIGGER_ONE,
  70         SR_TRIGGER_RISING,
  71         SR_TRIGGER_FALLING,
  72 };
  73
  74 static const char *channel_names[] = {
  75         "CH0", "CH1", "CH2", "CH3", "CH4", "CH5", "CH6", "CH7",
  76         "CH8", "CH9", "CH10", "CH11", "CH12", "CH13", "CH14", "CH15",
  77 };
  78
  79 /*
  80  * The hardware uses a (model dependent) 100/200/500MHz base clock and
  81  * a 16bit divider (common across all models). The range from 10kHz to
  82  * 100/200/500MHz should be applicable to all devices. High rates may
  83  * suffer from coarse resolution (e.g. in the "500MHz div 2" case) and
  84  * may not provide the desired 1/2/5 steps. This is not an issue now,
  85  * the 500MHz model is not supported yet by this driver.
  86  */
  87
  88 static const uint64_t samplerates_la2016[] = {
  89         SR_KHZ(10),
  90         SR_KHZ(20),
  91         SR_KHZ(50),
  92         SR_KHZ(100),
  93         SR_KHZ(200),
  94         SR_KHZ(500),
  95         SR_MHZ(1),
  96         SR_MHZ(2),
  97         SR_MHZ(4),
  98         SR_MHZ(5),
  99         SR_MHZ(8),
 100         SR_MHZ(10),
 101         SR_MHZ(20),
 102         SR_MHZ(50),
 103         SR_MHZ(100),
 104         SR_MHZ(200),
 105 };
 106
 107 static const uint64_t samplerates_la1016[] = {
 108         SR_KHZ(10),
 109         SR_KHZ(20),
 110         SR_KHZ(50),
 111         SR_KHZ(100),
 112         SR_KHZ(200),
 113         SR_KHZ(500),
 114         SR_MHZ(1),
 115         SR_MHZ(2),
 116         SR_MHZ(4),
 117         SR_MHZ(5),
 118         SR_MHZ(8),
 119         SR_MHZ(10),
 120         SR_MHZ(20),
 121         SR_MHZ(50),
 122         SR_MHZ(100),
 123 };
 124
 125 static const float logic_threshold_value[] = {
 126         1.58,
 127         2.5,
 128         1.165,
 129         1.5,
 130         1.25,
 131         0.9,
 132         0.75,
 133         0.60,
 134         0.45,
 135 };
 136
 137 static const char *logic_threshold[] = {
 138         "TTL 5V",
 139         "CMOS 5V",
 140         "CMOS 3.3V",
 141         "CMOS 3.0V",
 142         "CMOS 2.5V",
 143         "CMOS 1.8V",
 144         "CMOS 1.5V",
 145         "CMOS 1.2V",
 146         "CMOS 0.9V",
 147         "USER",
 148 };
 149
 150 #define LOGIC_THRESHOLD_IDX_USER        (ARRAY_SIZE(logic_threshold) - 1)
 151
 152 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 153 {
 154         struct drv_context *drvc;
 155         struct sr_context *ctx;
 156         struct dev_context *devc;
 157         struct sr_dev_inst *sdi;
 158         struct sr_usb_dev_inst *usb;
 159         struct sr_config *src;
 160         GSList *l;
 161         GSList *devices;
 162         GSList *conn_devices;
 163         struct libusb_device_descriptor des;
 164         libusb_device **devlist, *dev;
 165         size_t dev_count, dev_idx, ch_idx;
 166         uint8_t bus, addr;
 167         const char *conn;
 168         char conn_id[64];
 169         uint64_t fw_uploaded;
 170         int ret;
 171
 172         drvc = di->context;
 173         ctx = drvc->sr_ctx;;
 174
 175         conn = NULL;
 176         for (l = options; l; l = l->next) {
 177                 src = l->data;
 178                 switch (src->key) {
 179                 case SR_CONF_CONN:
 180                         conn = g_variant_get_string(src->data, NULL);
 181                         break;
 182                 }
 183         }
 184         if (conn)
 185                 conn_devices = sr_usb_find(ctx->libusb_ctx, conn);
 186         else
 187                 conn_devices = NULL;
 188
 189         /* Find all LA2016 devices, optionally upload firmware to them. */
 190         devices = NULL;
 191         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 192         if (ret < 0) {
 193                 sr_err("Cannot get device list: %s.", libusb_error_name(ret));
 194                 return devices;
 195         }
 196         dev_count = ret;
 197         for (dev_idx = 0; dev_idx < dev_count; dev_idx++) {
 198                 dev = devlist[dev_idx];
 199                 bus = libusb_get_bus_number(dev);
 200                 addr = libusb_get_device_address(dev);
 201                 if (conn) {
 202                         usb = NULL;
 203                         for (l = conn_devices; l; l = l->next) {
 204                                 usb = l->data;
 205                                 if (usb->bus == bus && usb->address == addr)
 206                                         break;
 207                         }
 208                         if (!l) {
 209                                 /*
 210                                  * A connection parameter was specified and
 211                                  * this device does not match the filter.
 212                                  */
 213                                 continue;
 214                         }
 215                 }
 216
 217                 libusb_get_device_descriptor(dev, &des);
 218                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 219                 if (ret < 0)
 220                         continue;
 221                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 222                         continue;
 223
 224                 /* USB identification matches, a device was found. */
 225                 sr_dbg("Found a device (USB identification).");
 226                 sdi = g_malloc0(sizeof(*sdi));
 227                 sdi->status = SR_ST_INITIALIZING;
 228                 sdi->connection_id = g_strdup(conn_id);
 229
 230                 fw_uploaded = 0;
 231                 if (des.iProduct != LA2016_IPRODUCT_INDEX) {
 232                         sr_info("Device at '%s' has no firmware loaded.",
 233                                 conn_id);
 234
 235                         ret = la2016_upload_firmware(ctx, dev, des.idProduct);
 236                         if (ret != SR_OK) {
 237                                 sr_err("MCU firmware upload failed.");
 238                                 g_free(sdi->connection_id);
 239                                 g_free(sdi);
 240                                 continue;
 241                         }
 242                         fw_uploaded = g_get_monotonic_time();
 243                         /* Will re-enumerate. Mark as "unknown address yet". */
 244                         addr = 0xff;
 245                 }
 246
 247                 sdi->vendor = g_strdup("Kingst");
 248                 sdi->model = g_strdup("LA2016");
 249
 250                 for (ch_idx = 0; ch_idx < ARRAY_SIZE(channel_names); ch_idx++) {
 251                         sr_channel_new(sdi, ch_idx, SR_CHANNEL_LOGIC,
 252                                 TRUE, channel_names[ch_idx]);
 253                 }
 254
 255                 devices = g_slist_append(devices, sdi);
 256
 257                 devc = g_malloc0(sizeof(*devc));
 258                 sdi->priv = devc;
 259                 devc->fw_uploaded = fw_uploaded;
 260                 sr_sw_limits_init(&devc->sw_limits);
 261                 devc->sw_limits.limit_samples = LA2016_DFLT_SAMPLEDEPTH;
 262                 devc->capture_ratio = LA2016_DFLT_CAPT_RATIO;
 263                 devc->cur_samplerate = LA2016_DFLT_SAMPLERATE;
 264                 devc->threshold_voltage_idx = 0;
 265                 devc->threshold_voltage = logic_threshold_value[devc->threshold_voltage_idx];
 266
 267                 sdi->status = SR_ST_INACTIVE;
 268                 sdi->inst_type = SR_INST_USB;
 269
 270                 sdi->conn = sr_usb_dev_inst_new(bus, addr, NULL);
 271         }
 272         libusb_free_device_list(devlist, 1);
 273         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 274
 275         return std_scan_complete(di, devices);
 276 }
 277
 278 static int la2016_dev_open(struct sr_dev_inst *sdi)
 279 {
 280         struct sr_dev_driver *di;
 281         struct drv_context *drvc;
 282         struct sr_context *ctx;
 283         libusb_device **devlist, *dev;
 284         struct sr_usb_dev_inst *usb;
 285         struct libusb_device_descriptor des;
 286         int ret;
 287         size_t device_count, dev_idx;
 288         gboolean check_conn;
 289         char conn_id[64];
 290
 291         di = sdi->driver;
 292         drvc = di->context;
 293         ctx = drvc->sr_ctx;;
 294         usb = sdi->conn;
 295         ret = SR_ERR;
 296
 297         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 298         if (ret < 0) {
 299                 sr_err("Cannot get device list: %s.", libusb_error_name(ret));
 300                 return SR_ERR;
 301         }
 302         device_count = ret;
 303         if (!device_count) {
 304                 sr_warn("Device list is empty. Cannot open.");
 305                 return SR_ERR;
 306         }
 307         for (dev_idx = 0; dev_idx < device_count; dev_idx++) {
 308                 dev = devlist[dev_idx];
 309                 libusb_get_device_descriptor(dev, &des);
 310
 311                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 312                         continue;
 313                 if (des.iProduct != LA2016_IPRODUCT_INDEX)
 314                         continue;
 315
 316                 check_conn = sdi->status == SR_ST_INITIALIZING;
 317                 check_conn |= sdi->status == SR_ST_INACTIVE;
 318                 if (check_conn) {
 319                         /* Check physical USB bus/port address. */
 320                         ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 321                         if (ret < 0)
 322                                 continue;
 323                         if (strcmp(sdi->connection_id, conn_id) != 0) {
 324                                 /* Not the device we looked up before. */
 325                                 continue;
 326                         }
 327                 }
 328
 329                 ret = libusb_open(dev, &usb->devhdl);
 330                 if (ret != 0) {
 331                         sr_err("Cannot open device: %s.",
 332                                 libusb_error_name(ret));
 333                         ret = SR_ERR_IO;
 334                         break;
 335                 }
 336
 337                 if (usb->address == 0xff) {
 338                         /*
 339                          * First encounter after firmware upload.
 340                          * Grab current address after enumeration.
 341                          */
 342                         usb->address = libusb_get_device_address(dev);
 343                 }
 344
 345                 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 346                 if (ret == LIBUSB_ERROR_BUSY) {
 347                         sr_err("Cannot claim USB interface. Another program or driver using it?");
 348                         ret = SR_ERR;
 349                         break;
 350                 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 351                         sr_err("Device has been disconnected.");
 352                         ret = SR_ERR;
 353                         break;
 354                 } else if (ret != 0) {
 355                         sr_err("Cannot claim USB interface: %s.",
 356                                 libusb_error_name(ret));
 357                         ret = SR_ERR;
 358                         break;
 359                 }
 360
 361                 if ((ret = la2016_init_device(sdi)) != SR_OK) {
 362                         sr_err("Cannot initialize device.");
 363                         break;
 364                 }
 365
 366                 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
 367                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 368                 ret = SR_OK;
 369                 break;
 370         }
 371         libusb_free_device_list(devlist, 1);
 372
 373         if (ret != SR_OK) {
 374                 if (usb->devhdl) {
 375                         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 376                         libusb_close(usb->devhdl);
 377                         usb->devhdl = NULL;
 378                 }
 379                 return ret;
 380         }
 381
 382         return SR_OK;
 383 }
 384
 385 static int dev_open(struct sr_dev_inst *sdi)
 386 {
 387         struct dev_context *devc;
 388         uint64_t reset_done, now, elapsed_ms;
 389         int ret;
 390
 391         devc = sdi->priv;
 392
 393         /*
 394          * When the sigrok driver recently has uploaded MCU firmware,
 395          * then wait for the FX2 to re-enumerate. Allow the USB device
 396          * to vanish before it reappears. Timeouts are rough estimates
 397          * after all, the imprecise time of the last check (potentially
 398          * executes after the total check period) simplifies code paths
 399          * with optional diagnostics. And increases the probability of
 400          * successfully detecting "late/slow" devices.
 401          */
 402         if (devc->fw_uploaded) {
 403                 sr_info("Waiting for device to reset after firmware upload.");
 404                 now = g_get_monotonic_time();
 405                 reset_done = devc->fw_uploaded + RENUM_GONE_DELAY_MS * 1000;
 406                 if (now < reset_done)
 407                         g_usleep(reset_done - now);
 408                 do {
 409                         now = g_get_monotonic_time();
 410                         elapsed_ms = (now - devc->fw_uploaded) / 1000;
 411                         sr_spew("Waited %" PRIu64 "ms.", elapsed_ms);
 412                         ret = la2016_dev_open(sdi);
 413                         if (ret == SR_OK) {
 414                                 devc->fw_uploaded = 0;
 415                                 break;
 416                         }
 417                         g_usleep(RENUM_POLL_INTERVAL_MS * 1000);
 418                 } while (elapsed_ms < RENUM_CHECK_PERIOD_MS);
 419                 if (ret != SR_OK) {
 420                         sr_err("Device failed to re-enumerate.");
 421                         return ret;
 422                 }
 423                 sr_info("Device came back after %" PRIi64 "ms.", elapsed_ms);
 424         } else {
 425                 ret = la2016_dev_open(sdi);
 426         }
 427
 428         if (ret != SR_OK) {
 429                 sr_err("Cannot open device.");
 430                 return ret;
 431         }
 432
 433         return SR_OK;
 434 }
 435
 436 static int dev_close(struct sr_dev_inst *sdi)
 437 {
 438         struct sr_usb_dev_inst *usb;
 439
 440         usb = sdi->conn;
 441
 442         if (!usb->devhdl)
 443                 return SR_ERR_BUG;
 444
 445         la2016_deinit_device(sdi);
 446
 447         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 448                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 449         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 450         libusb_close(usb->devhdl);
 451         usb->devhdl = NULL;
 452
 453         return SR_OK;
 454 }
 455
 456 static int config_get(uint32_t key, GVariant **data,
 457         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 458 {
 459         struct dev_context *devc;
 460         struct sr_usb_dev_inst *usb;
 461         double rounded;
 462         const char *label;
 463
 464         (void)cg;
 465
 466         if (!sdi)
 467                 return SR_ERR_ARG;
 468         devc = sdi->priv;
 469
 470         switch (key) {
 471         case SR_CONF_CONN:
 472                 if (!sdi->conn)
 473                         return SR_ERR_ARG;
 474                 usb = sdi->conn;
 475                 if (usb->address == 0xff) {
 476                         /*
 477                          * Device still needs to re-enumerate after firmware
 478                          * upload, so we don't know its (future) address.
 479                          */
 480                         return SR_ERR;
 481                 }
 482                 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
 483                 break;
 484         case SR_CONF_SAMPLERATE:
 485                 *data = g_variant_new_uint64(devc->cur_samplerate);
 486                 break;
 487         case SR_CONF_LIMIT_SAMPLES:
 488         case SR_CONF_LIMIT_MSEC:
 489                 return sr_sw_limits_config_get(&devc->sw_limits, key, data);
 490         case SR_CONF_CAPTURE_RATIO:
 491                 *data = g_variant_new_uint64(devc->capture_ratio);
 492                 break;
 493         case SR_CONF_VOLTAGE_THRESHOLD:
 494                 rounded = (int)(devc->threshold_voltage / 0.1) * 0.1;
 495                 *data = std_gvar_tuple_double(rounded, rounded + 0.1);
 496                 return SR_OK;
 497         case SR_CONF_LOGIC_THRESHOLD:
 498                 label = logic_threshold[devc->threshold_voltage_idx];
 499                 *data = g_variant_new_string(label);
 500                 break;
 501         case SR_CONF_LOGIC_THRESHOLD_CUSTOM:
 502                 *data = g_variant_new_double(devc->threshold_voltage);
 503                 break;
 504
 505         default:
 506                 return SR_ERR_NA;
 507         }
 508
 509         return SR_OK;
 510 }
 511
 512 static int config_set(uint32_t key, GVariant *data,
 513         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 514 {
 515         struct dev_context *devc;
 516         double low, high;
 517         int idx;
 518
 519         (void)cg;
 520
 521         devc = sdi->priv;
 522
 523         switch (key) {
 524         case SR_CONF_SAMPLERATE:
 525                 devc->cur_samplerate = g_variant_get_uint64(data);
 526                 break;
 527         case SR_CONF_LIMIT_SAMPLES:
 528         case SR_CONF_LIMIT_MSEC:
 529                 return sr_sw_limits_config_set(&devc->sw_limits, key, data);
 530         case SR_CONF_CAPTURE_RATIO:
 531                 devc->capture_ratio = g_variant_get_uint64(data);
 532                 break;
 533         case SR_CONF_VOLTAGE_THRESHOLD:
 534                 g_variant_get(data, "(dd)", &low, &high);
 535                 devc->threshold_voltage = (low + high) / 2.0;
 536                 devc->threshold_voltage_idx = LOGIC_THRESHOLD_IDX_USER;
 537                 break;
 538         case SR_CONF_LOGIC_THRESHOLD: {
 539                 idx = std_str_idx(data, ARRAY_AND_SIZE(logic_threshold));
 540                 if (idx < 0)
 541                         return SR_ERR_ARG;
 542                 if (idx != LOGIC_THRESHOLD_IDX_USER) {
 543                         devc->threshold_voltage = logic_threshold_value[idx];
 544                 }
 545                 devc->threshold_voltage_idx = idx;
 546                 break;
 547         }
 548         case SR_CONF_LOGIC_THRESHOLD_CUSTOM:
 549                 devc->threshold_voltage = g_variant_get_double(data);
 550                 break;
 551         default:
 552                 return SR_ERR_NA;
 553         }
 554
 555         return SR_OK;
 556 }
 557
 558 static int config_list(uint32_t key, GVariant **data,
 559         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 560 {
 561         struct dev_context *devc;
 562
 563         devc = sdi ? sdi->priv : NULL;
 564
 565         switch (key) {
 566         case SR_CONF_SCAN_OPTIONS:
 567         case SR_CONF_DEVICE_OPTIONS:
 568                 return STD_CONFIG_LIST(key, data, sdi, cg,
 569                         scanopts, drvopts, devopts);
 570         case SR_CONF_SAMPLERATE:
 571                 if (!sdi)
 572                         return SR_ERR_ARG;
 573                 if (devc->max_samplerate == SR_MHZ(200)) {
 574                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates_la2016));
 575                 } else {
 576                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates_la1016));
 577                 }
 578                 break;
 579         case SR_CONF_LIMIT_SAMPLES:
 580                 *data = std_gvar_tuple_u64(LA2016_NUM_SAMPLES_MIN,
 581                         LA2016_NUM_SAMPLES_MAX);
 582                 break;
 583         case SR_CONF_VOLTAGE_THRESHOLD:
 584                 *data = std_gvar_min_max_step_thresholds(
 585                         LA2016_THR_VOLTAGE_MIN,
 586                         LA2016_THR_VOLTAGE_MAX, 0.1);
 587                 break;
 588         case SR_CONF_TRIGGER_MATCH:
 589                 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
 590                 break;
 591         case SR_CONF_LOGIC_THRESHOLD:
 592                 *data = g_variant_new_strv(ARRAY_AND_SIZE(logic_threshold));
 593                 break;
 594         default:
 595                 return SR_ERR_NA;
 596         }
 597
 598         return SR_OK;
 599 }
 600
 601 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 602 {
 603         struct sr_dev_driver *di;
 604         struct drv_context *drvc;
 605         struct sr_context *ctx;
 606         struct dev_context *devc;
 607         int ret;
 608
 609         di = sdi->driver;
 610         drvc = di->context;
 611         ctx = drvc->sr_ctx;;
 612         devc = sdi->priv;
 613
 614         if (!devc->feed_queue) {
 615                 devc->feed_queue = feed_queue_logic_alloc(sdi,
 616                         LA2016_CONVBUFFER_SIZE, sizeof(uint16_t));
 617                 if (!devc->feed_queue) {
 618                         sr_err("Cannot allocate buffer for session feed.");
 619                         return SR_ERR_MALLOC;
 620                 }
 621         }
 622
 623         sr_sw_limits_acquisition_start(&devc->sw_limits);
 624
 625         ret = la2016_setup_acquisition(sdi);
 626         if (ret != SR_OK) {
 627                 feed_queue_logic_free(devc->feed_queue);
 628                 devc->feed_queue = NULL;
 629                 return ret;
 630         }
 631
 632         ret = la2016_start_acquisition(sdi);
 633         if (ret != SR_OK) {
 634                 la2016_abort_acquisition(sdi);
 635                 feed_queue_logic_free(devc->feed_queue);
 636                 devc->feed_queue = NULL;
 637                 return ret;
 638         }
 639
 640         devc->completion_seen = FALSE;
 641         usb_source_add(sdi->session, ctx, 50,
 642                 la2016_receive_data, (void *)sdi);
 643
 644         std_session_send_df_header(sdi);
 645
 646         return SR_OK;
 647 }
 648
 649 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 650 {
 651         int ret;
 652
 653         ret = la2016_abort_acquisition(sdi);
 654
 655         return ret;
 656 }
 657
 658 static struct sr_dev_driver kingst_la2016_driver_info = {
 659         .name = "kingst-la2016",
 660         .longname = "Kingst LA2016",
 661         .api_version = 1,
 662         .init = std_init,
 663         .cleanup = std_cleanup,
 664         .scan = scan,
 665         .dev_list = std_dev_list,
 666         .dev_clear = std_dev_clear,
 667         .config_get = config_get,
 668         .config_set = config_set,
 669         .config_list = config_list,
 670         .dev_open = dev_open,
 671         .dev_close = dev_close,
 672         .dev_acquisition_start = dev_acquisition_start,
 673         .dev_acquisition_stop = dev_acquisition_stop,
 674         .context = NULL,
 675 };
 676 SR_REGISTER_DEV_DRIVER(kingst_la2016_driver_info);