src/hardware/fx2lafw/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   5  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "protocol.h"
  22
  23 static const struct fx2lafw_profile supported_fx2[] = {
  24         /*
  25          * CWAV USBee AX
  26          * EE Electronics ESLA201A
  27          * ARMFLY AX-Pro
  28          */
  29         { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL,
  30                 FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw",
  31                 0, NULL, NULL},
  32         /*
  33          * CWAV USBee DX
  34          * XZL-Studio DX
  35          */
  36         { 0x08a9, 0x0015, "CWAV", "USBee DX", NULL,
  37                 FIRMWARE_DIR "/fx2lafw-cwav-usbeedx.fw",
  38                 DEV_CAPS_16BIT, NULL, NULL },
  39
  40         /*
  41          * CWAV USBee SX
  42          */
  43         { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL,
  44                 FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw",
  45                 0, NULL, NULL},
  46
  47         /*
  48          * Saleae Logic
  49          * EE Electronics ESLA100
  50          * Robomotic MiniLogic
  51          * Robomotic BugLogic 3
  52          */
  53         { 0x0925, 0x3881, "Saleae", "Logic", NULL,
  54                 FIRMWARE_DIR "/fx2lafw-saleae-logic.fw",
  55                 0, NULL, NULL},
  56
  57         /*
  58          * Default Cypress FX2 without EEPROM, e.g.:
  59          * Lcsoft Mini Board
  60          * Braintechnology USB Interface V2.x
  61          */
  62         { 0x04B4, 0x8613, "Cypress", "FX2", NULL,
  63                 FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw",
  64                 DEV_CAPS_16BIT, NULL, NULL },
  65
  66         /*
  67          * Braintechnology USB-LPS
  68          */
  69         { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL,
  70                 FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw",
  71                 DEV_CAPS_16BIT, NULL, NULL },
  72
  73         { 0, 0, 0, 0, 0, 0, 0, 0, 0 }
  74 };
  75
  76 static const uint32_t scanopts[] = {
  77         SR_CONF_CONN,
  78 };
  79
  80 static const uint32_t devopts[] = {
  81         SR_CONF_LOGIC_ANALYZER,
  82         SR_CONF_CONTINUOUS,
  83         SR_CONF_CONN | SR_CONF_GET,
  84         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  85         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  86         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  87 };
  88
  89 static const char *channel_names[] = {
  90         "0",  "1",  "2",  "3",  "4",  "5",  "6",  "7",
  91         "8",  "9", "10", "11", "12", "13", "14", "15",
  92         NULL,
  93 };
  94
  95 static const int32_t soft_trigger_matches[] = {
  96         SR_TRIGGER_ZERO,
  97         SR_TRIGGER_ONE,
  98         SR_TRIGGER_RISING,
  99         SR_TRIGGER_FALLING,
 100         SR_TRIGGER_EDGE,
 101 };
 102
 103 static const uint64_t samplerates[] = {
 104         SR_KHZ(20),
 105         SR_KHZ(25),
 106         SR_KHZ(50),
 107         SR_KHZ(100),
 108         SR_KHZ(200),
 109         SR_KHZ(250),
 110         SR_KHZ(500),
 111         SR_MHZ(1),
 112         SR_MHZ(2),
 113         SR_MHZ(3),
 114         SR_MHZ(4),
 115         SR_MHZ(6),
 116         SR_MHZ(8),
 117         SR_MHZ(12),
 118         SR_MHZ(16),
 119         SR_MHZ(24),
 120 };
 121
 122 SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
 123 static struct sr_dev_driver *di = &fx2lafw_driver_info;
 124
 125 static int init(struct sr_context *sr_ctx)
 126 {
 127         return std_init(sr_ctx, di, LOG_PREFIX);
 128 }
 129
 130 static GSList *scan(GSList *options)
 131 {
 132         struct drv_context *drvc;
 133         struct dev_context *devc;
 134         struct sr_dev_inst *sdi;
 135         struct sr_usb_dev_inst *usb;
 136         struct sr_channel *ch;
 137         struct sr_config *src;
 138         const struct fx2lafw_profile *prof;
 139         GSList *l, *devices, *conn_devices;
 140         struct libusb_device_descriptor des;
 141         libusb_device **devlist;
 142         struct libusb_device_handle *hdl;
 143         int num_logic_channels, ret, i, j;
 144         const char *conn;
 145         char manufacturer[64], product[64], serial_num[64], connection_id[64];
 146
 147         drvc = di->priv;
 148
 149         conn = NULL;
 150         for (l = options; l; l = l->next) {
 151                 src = l->data;
 152                 switch (src->key) {
 153                 case SR_CONF_CONN:
 154                         conn = g_variant_get_string(src->data, NULL);
 155                         break;
 156                 }
 157         }
 158         if (conn)
 159                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 160         else
 161                 conn_devices = NULL;
 162
 163         /* Find all fx2lafw compatible devices and upload firmware to them. */
 164         devices = NULL;
 165         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 166         for (i = 0; devlist[i]; i++) {
 167                 if (conn) {
 168                         usb = NULL;
 169                         for (l = conn_devices; l; l = l->next) {
 170                                 usb = l->data;
 171                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 172                                         && usb->address == libusb_get_device_address(devlist[i]))
 173                                         break;
 174                         }
 175                         if (!l)
 176                                 /* This device matched none of the ones that
 177                                  * matched the conn specification. */
 178                                 continue;
 179                 }
 180
 181                 if ((ret = libusb_get_device_descriptor( devlist[i], &des)) != 0) {
 182                         sr_warn("Failed to get device descriptor: %s.",
 183                                 libusb_error_name(ret));
 184                         continue;
 185                 }
 186
 187                 if ((ret = libusb_open(devlist[i], &hdl)) < 0)
 188                         continue;
 189
 190                 if (des.iManufacturer == 0) {
 191                         manufacturer[0] = '\0';
 192                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 193                                 des.iManufacturer, (unsigned char *) manufacturer,
 194                                 sizeof(manufacturer))) < 0) {
 195                         sr_warn("Failed to get manufacturer string descriptor: %s.",
 196                                 libusb_error_name(ret));
 197                         continue;
 198                 }
 199
 200                 if (des.iProduct == 0) {
 201                         product[0] = '\0';
 202                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 203                                 des.iProduct, (unsigned char *) product,
 204                                 sizeof(product))) < 0) {
 205                         sr_warn("Failed to get product string descriptor: %s.",
 206                                 libusb_error_name(ret));
 207                         continue;
 208                 }
 209
 210                 if (des.iSerialNumber == 0) {
 211                         serial_num[0] = '\0';
 212                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 213                                 des.iSerialNumber, (unsigned char *) serial_num,
 214                                 sizeof(serial_num))) < 0) {
 215                         sr_warn("Failed to get serial number string descriptor: %s.",
 216                                 libusb_error_name(ret));
 217                         continue;
 218                 }
 219
 220                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 221
 222                 libusb_close(hdl);
 223
 224                 prof = NULL;
 225                 for (j = 0; supported_fx2[j].vid; j++) {
 226                         if (des.idVendor == supported_fx2[j].vid &&
 227                                         des.idProduct == supported_fx2[j].pid &&
 228                                         (!supported_fx2[j].usb_manufacturer ||
 229                                          !strcmp(manufacturer, supported_fx2[j].usb_manufacturer)) &&
 230                                         (!supported_fx2[j].usb_manufacturer ||
 231                                          !strcmp(product, supported_fx2[j].usb_product))) {
 232                                 prof = &supported_fx2[j];
 233                                 break;
 234                         }
 235                 }
 236
 237                 /* Skip if the device was not found. */
 238                 if (!prof)
 239                         continue;
 240
 241                 sdi = sr_dev_inst_new(SR_ST_INITIALIZING,
 242                         prof->vendor, prof->model, prof->model_version);
 243                 if (!sdi)
 244                         return NULL;
 245                 sdi->driver = di;
 246                 sdi->serial_num = g_strdup(serial_num);
 247                 sdi->connection_id = g_strdup(connection_id);
 248
 249                 /* Fill in channellist according to this device's profile. */
 250                 num_logic_channels = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8;
 251                 for (j = 0; j < num_logic_channels; j++) {
 252                         if (!(ch = sr_channel_new(j, SR_CHANNEL_LOGIC, TRUE,
 253                                         channel_names[j])))
 254                                 return NULL;
 255                         sdi->channels = g_slist_append(sdi->channels, ch);
 256                 }
 257
 258                 devc = fx2lafw_dev_new();
 259                 devc->profile = prof;
 260                 sdi->priv = devc;
 261                 drvc->instances = g_slist_append(drvc->instances, sdi);
 262                 devices = g_slist_append(devices, sdi);
 263
 264                 if (fx2lafw_check_conf_profile(devlist[i])) {
 265                         /* Already has the firmware, so fix the new address. */
 266                         sr_dbg("Found an fx2lafw device.");
 267                         sdi->status = SR_ST_INACTIVE;
 268                         sdi->inst_type = SR_INST_USB;
 269                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 270                                         libusb_get_device_address(devlist[i]), NULL);
 271                 } else {
 272                         if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 273                                 prof->firmware) == SR_OK)
 274                                 /* Store when this device's FW was updated. */
 275                                 devc->fw_updated = g_get_monotonic_time();
 276                         else
 277                                 sr_err("Firmware upload failed for "
 278                                        "device %d.%d (logical).",
 279                                        libusb_get_bus_number(devlist[i]),
 280                                        libusb_get_device_address(devlist[i]));
 281                         sdi->inst_type = SR_INST_USB;
 282                         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 283                                         0xff, NULL);
 284                 }
 285         }
 286         libusb_free_device_list(devlist, 1);
 287         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 288
 289         return devices;
 290 }
 291
 292 static GSList *dev_list(void)
 293 {
 294         return ((struct drv_context *)(di->priv))->instances;
 295 }
 296
 297 static int dev_open(struct sr_dev_inst *sdi)
 298 {
 299         struct sr_usb_dev_inst *usb;
 300         struct dev_context *devc;
 301         int ret;
 302         int64_t timediff_us, timediff_ms;
 303
 304         devc = sdi->priv;
 305         usb = sdi->conn;
 306
 307         /*
 308          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 309          * milliseconds for the FX2 to renumerate.
 310          */
 311         ret = SR_ERR;
 312         if (devc->fw_updated > 0) {
 313                 sr_info("Waiting for device to reset.");
 314                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 315                 g_usleep(300 * 1000);
 316                 timediff_ms = 0;
 317                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 318                         if ((ret = fx2lafw_dev_open(sdi, di)) == SR_OK)
 319                                 break;
 320                         g_usleep(100 * 1000);
 321
 322                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 323                         timediff_ms = timediff_us / 1000;
 324                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 325                 }
 326                 if (ret != SR_OK) {
 327                         sr_err("Device failed to renumerate.");
 328                         return SR_ERR;
 329                 }
 330                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 331         } else {
 332                 sr_info("Firmware upload was not needed.");
 333                 ret = fx2lafw_dev_open(sdi, di);
 334         }
 335
 336         if (ret != SR_OK) {
 337                 sr_err("Unable to open device.");
 338                 return SR_ERR;
 339         }
 340
 341         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 342         if (ret != 0) {
 343                 switch (ret) {
 344                 case LIBUSB_ERROR_BUSY:
 345                         sr_err("Unable to claim USB interface. Another "
 346                                "program or driver has already claimed it.");
 347                         break;
 348                 case LIBUSB_ERROR_NO_DEVICE:
 349                         sr_err("Device has been disconnected.");
 350                         break;
 351                 default:
 352                         sr_err("Unable to claim interface: %s.",
 353                                libusb_error_name(ret));
 354                         break;
 355                 }
 356
 357                 return SR_ERR;
 358         }
 359
 360         if (devc->cur_samplerate == 0) {
 361                 /* Samplerate hasn't been set; default to the slowest one. */
 362                 devc->cur_samplerate = samplerates[0];
 363         }
 364
 365         return SR_OK;
 366 }
 367
 368 static int dev_close(struct sr_dev_inst *sdi)
 369 {
 370         struct sr_usb_dev_inst *usb;
 371
 372         usb = sdi->conn;
 373         if (usb->devhdl == NULL)
 374                 return SR_ERR;
 375
 376         sr_info("fx2lafw: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 377                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 378         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 379         libusb_close(usb->devhdl);
 380         usb->devhdl = NULL;
 381         sdi->status = SR_ST_INACTIVE;
 382
 383         return SR_OK;
 384 }
 385
 386 static int cleanup(void)
 387 {
 388         int ret;
 389         struct drv_context *drvc;
 390
 391         if (!(drvc = di->priv))
 392                 return SR_OK;
 393
 394         ret = std_dev_clear(di, NULL);
 395
 396         g_free(drvc);
 397         di->priv = NULL;
 398
 399         return ret;
 400 }
 401
 402 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 403                 const struct sr_channel_group *cg)
 404 {
 405         struct dev_context *devc;
 406         struct sr_usb_dev_inst *usb;
 407         char str[128];
 408
 409         (void)cg;
 410
 411         if (!sdi)
 412                 return SR_ERR_ARG;
 413
 414         devc = sdi->priv;
 415
 416         switch (key) {
 417         case SR_CONF_CONN:
 418                 if (!sdi->conn)
 419                         return SR_ERR_ARG;
 420                 usb = sdi->conn;
 421                 if (usb->address == 255)
 422                         /* Device still needs to re-enumerate after firmware
 423                          * upload, so we don't know its (future) address. */
 424                         return SR_ERR;
 425                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 426                 *data = g_variant_new_string(str);
 427                 break;
 428         case SR_CONF_LIMIT_SAMPLES:
 429                 *data = g_variant_new_uint64(devc->limit_samples);
 430                 break;
 431         case SR_CONF_SAMPLERATE:
 432                 *data = g_variant_new_uint64(devc->cur_samplerate);
 433                 break;
 434         default:
 435                 return SR_ERR_NA;
 436         }
 437
 438         return SR_OK;
 439 }
 440
 441 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 442                 const struct sr_channel_group *cg)
 443 {
 444         struct dev_context *devc;
 445         uint64_t arg;
 446         unsigned int i;
 447         int ret;
 448
 449         (void)cg;
 450
 451         if (!sdi)
 452                 return SR_ERR_ARG;
 453
 454         if (sdi->status != SR_ST_ACTIVE)
 455                 return SR_ERR;
 456
 457         devc = sdi->priv;
 458
 459         ret = SR_OK;
 460
 461         switch (key) {
 462                 case SR_CONF_SAMPLERATE:
 463                         arg = g_variant_get_uint64(data);
 464                         for (i = 0; i < ARRAY_SIZE(samplerates); i++) {
 465                                 if (samplerates[i] == arg) {
 466                                         devc->cur_samplerate = arg;
 467                                         break;
 468                                 }
 469                         }
 470                         if (i == ARRAY_SIZE(samplerates))
 471                                 ret = SR_ERR_ARG;
 472                         break;
 473                 case SR_CONF_LIMIT_SAMPLES:
 474                         devc->limit_samples = g_variant_get_uint64(data);
 475                         break;
 476                 default:
 477                         ret = SR_ERR_NA;
 478         }
 479
 480         return ret;
 481 }
 482
 483 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 484                 const struct sr_channel_group *cg)
 485 {
 486         GVariant *gvar;
 487         GVariantBuilder gvb;
 488
 489         (void)sdi;
 490         (void)cg;
 491
 492         switch (key) {
 493         case SR_CONF_SCAN_OPTIONS:
 494                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 495                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 496                 break;
 497         case SR_CONF_DEVICE_OPTIONS:
 498                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 499                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 500                 break;
 501         case SR_CONF_SAMPLERATE:
 502                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 503                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 504                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 505                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 506                 *data = g_variant_builder_end(&gvb);
 507                 break;
 508         case SR_CONF_TRIGGER_MATCH:
 509                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 510                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 511                                 sizeof(int32_t));
 512                 break;
 513         default:
 514                 return SR_ERR_NA;
 515         }
 516
 517         return SR_OK;
 518 }
 519
 520 static int receive_data(int fd, int revents, void *cb_data)
 521 {
 522         struct timeval tv;
 523         struct drv_context *drvc;
 524
 525         (void)fd;
 526         (void)revents;
 527         (void)cb_data;
 528
 529         drvc = di->priv;
 530
 531         tv.tv_sec = tv.tv_usec = 0;
 532         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 533
 534         return TRUE;
 535 }
 536
 537 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 538 {
 539         struct dev_context *devc;
 540         struct drv_context *drvc;
 541         struct sr_usb_dev_inst *usb;
 542         struct sr_trigger *trigger;
 543         struct libusb_transfer *transfer;
 544         unsigned int i, timeout, num_transfers;
 545         int ret;
 546         unsigned char *buf;
 547         size_t size;
 548
 549         if (sdi->status != SR_ST_ACTIVE)
 550                 return SR_ERR_DEV_CLOSED;
 551
 552         drvc = di->priv;
 553         devc = sdi->priv;
 554         usb = sdi->conn;
 555
 556         devc->cb_data = cb_data;
 557         devc->sent_samples = 0;
 558         devc->acq_aborted = FALSE;
 559         devc->empty_transfer_count = 0;
 560
 561         if ((trigger = sr_session_trigger_get(sdi->session))) {
 562                 devc->stl = soft_trigger_logic_new(sdi, trigger);
 563                 devc->trigger_fired = FALSE;
 564         } else
 565                 devc->trigger_fired = TRUE;
 566
 567         timeout = fx2lafw_get_timeout(devc);
 568         num_transfers = fx2lafw_get_number_of_transfers(devc);
 569         size = fx2lafw_get_buffer_size(devc);
 570         devc->submitted_transfers = 0;
 571
 572         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 573         if (!devc->transfers) {
 574                 sr_err("USB transfers malloc failed.");
 575                 return SR_ERR_MALLOC;
 576         }
 577
 578         devc->num_transfers = num_transfers;
 579         for (i = 0; i < num_transfers; i++) {
 580                 if (!(buf = g_try_malloc(size))) {
 581                         sr_err("USB transfer buffer malloc failed.");
 582                         return SR_ERR_MALLOC;
 583                 }
 584                 transfer = libusb_alloc_transfer(0);
 585                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 586                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 587                                 fx2lafw_receive_transfer, (void *)sdi, timeout);
 588                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 589                         sr_err("Failed to submit transfer: %s.",
 590                                libusb_error_name(ret));
 591                         libusb_free_transfer(transfer);
 592                         g_free(buf);
 593                         fx2lafw_abort_acquisition(devc);
 594                         return SR_ERR;
 595                 }
 596                 devc->transfers[i] = transfer;
 597                 devc->submitted_transfers++;
 598         }
 599
 600         devc->ctx = drvc->sr_ctx;
 601
 602         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, NULL);
 603
 604         /* Send header packet to the session bus. */
 605         std_session_send_df_header(cb_data, LOG_PREFIX);
 606
 607         if ((ret = fx2lafw_command_start_acquisition(sdi)) != SR_OK) {
 608                 fx2lafw_abort_acquisition(devc);
 609                 return ret;
 610         }
 611
 612         return SR_OK;
 613 }
 614
 615 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 616 {
 617         (void)cb_data;
 618
 619         fx2lafw_abort_acquisition(sdi->priv);
 620
 621         return SR_OK;
 622 }
 623
 624 SR_PRIV struct sr_dev_driver fx2lafw_driver_info = {
 625         .name = "fx2lafw",
 626         .longname = "fx2lafw (generic driver for FX2 based LAs)",
 627         .api_version = 1,
 628         .init = init,
 629         .cleanup = cleanup,
 630         .scan = scan,
 631         .dev_list = dev_list,
 632         .dev_clear = NULL,
 633         .config_get = config_get,
 634         .config_set = config_set,
 635         .config_list = config_list,
 636         .dev_open = dev_open,
 637         .dev_close = dev_close,
 638         .dev_acquisition_start = dev_acquisition_start,
 639         .dev_acquisition_stop = dev_acquisition_stop,
 640         .priv = NULL,
 641 };