hardware/genericdmm/api.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
   5  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   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 2 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, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  20  */
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <fcntl.h>
  25 #include "libsigrok.h"
  26 #include "libsigrok-internal.h"
  27 #include "genericdmm.h"
  28
  29
  30 extern SR_PRIV struct dmmchip dmmchip_fs9922;
  31
  32 static struct sr_hwopt victor_70c_vidpid[] = {
  33         { SR_HWOPT_CONN, "1244.d237" },
  34         { 0, NULL }
  35 };
  36 static struct dev_profile dev_profiles[] = {
  37         { "victor-70c", "Victor", "70C", &dmmchip_fs9922,
  38                 DMM_TRANSPORT_USBHID, victor_70c_vidpid
  39         },
  40         { "mastech-va18b", "Mastech", "VA18B", NULL, DMM_TRANSPORT_SERIAL, 0, NULL},
  41         { NULL, NULL, NULL, NULL, 0, 0, NULL }
  42 };
  43
  44 static const int hwopts[] = {
  45         SR_HWOPT_MODEL,
  46         SR_HWOPT_CONN,
  47         SR_HWOPT_SERIALCOMM,
  48         0,
  49 };
  50
  51 static const int hwcaps[] = {
  52         SR_HWCAP_MULTIMETER,
  53         SR_HWCAP_LIMIT_SAMPLES,
  54         SR_HWCAP_LIMIT_MSEC,
  55         SR_HWCAP_CONTINUOUS,
  56         0,
  57 };
  58
  59 static const char *probe_names[] = {
  60         "Probe",
  61         NULL,
  62 };
  63
  64 SR_PRIV struct sr_dev_driver genericdmm_driver_info;
  65 static struct sr_dev_driver *gdi = &genericdmm_driver_info;
  66 /* TODO need a way to keep this local to the static library */
  67 static libusb_context *genericdmm_usb_context = NULL;
  68 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
  69                 void *cb_data);
  70
  71
  72 static GSList *connect_usb(const char *conn)
  73 {
  74         struct sr_dev_inst *sdi;
  75         struct drv_context *drvc;
  76         struct dev_context *devc;
  77         struct sr_probe *probe;
  78         libusb_device **devlist;
  79         struct libusb_device_descriptor des;
  80         GSList *devices;
  81         GRegex *reg;
  82         GMatchInfo *match;
  83         int vid, pid, bus, addr, devcnt, err, i;
  84         char *mstr;
  85
  86         drvc = gdi->priv;
  87
  88         vid = pid = bus = addr = 0;
  89         reg = g_regex_new(DMM_CONN_USB_VIDPID, 0, 0, NULL);
  90         if (g_regex_match(reg, conn, 0, &match)) {
  91                 /* Extract VID. */
  92                 if ((mstr = g_match_info_fetch(match, 1)))
  93                         vid = strtoul(mstr, NULL, 16);
  94                 g_free(mstr);
  95
  96                 /* Extract PID. */
  97                 if ((mstr = g_match_info_fetch(match, 2)))
  98                         pid = strtoul(mstr, NULL, 16);
  99                 g_free(mstr);
 100         } else {
 101                 g_match_info_unref(match);
 102                 g_regex_unref(reg);
 103                 reg = g_regex_new(DMM_CONN_USB_BUSADDR, 0, 0, NULL);
 104                 if (g_regex_match(reg, conn, 0, &match)) {
 105                         /* Extract bus. */
 106                         if ((mstr = g_match_info_fetch(match, 0)))
 107                                 bus = strtoul(mstr, NULL, 16);
 108                         g_free(mstr);
 109
 110                         /* Extract address. */
 111                         if ((mstr = g_match_info_fetch(match, 0)))
 112                                 addr = strtoul(mstr, NULL, 16);
 113                         g_free(mstr);
 114                 }
 115         }
 116         g_match_info_unref(match);
 117         g_regex_unref(reg);
 118
 119         if (vid + pid + bus + addr == 0)
 120                 return NULL;
 121
 122         if (bus > 64) {
 123                 sr_err("invalid bus");
 124                 return NULL;
 125         }
 126
 127         if (addr > 127) {
 128                 sr_err("invalid address");
 129                 return NULL;
 130         }
 131
 132         /* Looks like a valid USB device specification, but is it connected? */
 133         devices = NULL;
 134         libusb_get_device_list(genericdmm_usb_context, &devlist);
 135         for (i = 0; devlist[i]; i++) {
 136                 if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
 137                         sr_err("genericdmm: failed to get device descriptor: %d", err);
 138                         continue;
 139                 }
 140
 141                 if (vid + pid && (des.idVendor != vid || des.idProduct != pid))
 142                         /* VID/PID specified, but no match. */
 143                         continue;
 144
 145                 if (bus + addr && (
 146                                 libusb_get_bus_number(devlist[i]) != bus
 147                                 || libusb_get_device_address(devlist[i]) != addr))
 148                         /* Bus/address specified, but no match. */
 149                         continue;
 150
 151                 /* Found one. */
 152                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 153                         sr_err("genericdmm: devc malloc failed.");
 154                         return 0;
 155                 }
 156
 157                 devcnt = g_slist_length(drvc->instances);
 158                 if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE,
 159                                 NULL, NULL, NULL))) {
 160                         sr_err("genericdmm: sr_dev_inst_new returned NULL.");
 161                         return NULL;
 162                 }
 163                 sdi->priv = devc;
 164                 if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
 165                         return NULL;
 166                 sdi->probes = g_slist_append(sdi->probes, probe);
 167                 devc->usb = sr_usb_dev_inst_new(
 168                                 libusb_get_bus_number(devlist[i]),
 169                                 libusb_get_device_address(devlist[i]), NULL);
 170                 devices = g_slist_append(devices, sdi);
 171         }
 172         libusb_free_device_list(devlist, 1);
 173
 174         return devices;
 175 }
 176
 177 static GSList *connect_serial(const char *conn, const char *serialcomm)
 178 {
 179         GSList *devices;
 180
 181         devices = NULL;
 182
 183         /* TODO */
 184         sr_dbg("not yet implemented");
 185
 186         return devices;
 187 }
 188
 189 GSList *genericdmm_connect(const char *conn, const char *serialcomm)
 190 {
 191         GSList *devices;
 192
 193         if (serialcomm)
 194                 /* Must be a serial port. */
 195                 return connect_serial(conn, serialcomm);
 196
 197         if ((devices = connect_usb(conn)))
 198                 return devices;
 199
 200         return NULL;
 201 }
 202
 203 static GSList *default_scan(GSList *options)
 204 {
 205         GSList *l, *devices;
 206         struct sr_hwopt *opt;
 207         const char *conn, *serialcomm;
 208
 209         devices = NULL;
 210         conn = serialcomm = NULL;
 211         for (l = options; l; l = l->next) {
 212                 opt = l->data;
 213                 switch (opt->hwopt) {
 214                 case SR_HWOPT_CONN:
 215                         conn = opt->value;
 216                         break;
 217                 case SR_HWOPT_SERIALCOMM:
 218                         serialcomm = opt->value;
 219                         break;
 220                 }
 221         }
 222         if (conn)
 223                 devices = genericdmm_connect(conn, serialcomm);
 224
 225         return devices;
 226 }
 227
 228 static int open_usb(struct sr_dev_inst *sdi)
 229 {
 230         libusb_device **devlist;
 231         struct libusb_device_descriptor des;
 232         struct dev_context *devc;
 233         int ret, tmp, cnt, i;
 234
 235         devc = sdi->priv;
 236
 237         if (sdi->status == SR_ST_ACTIVE)
 238                 /* already in use */
 239                 return SR_ERR;
 240
 241         cnt = libusb_get_device_list(genericdmm_usb_context, &devlist);
 242         if (cnt < 0) {
 243                 sr_err("genericdmm: Failed to retrieve device list (%d)", cnt);
 244                 return SR_ERR;
 245         }
 246
 247         ret = SR_ERR;
 248         for (i = 0; i < cnt; i++) {
 249                 if ((tmp = libusb_get_device_descriptor(devlist[i], &des))) {
 250                         sr_err("genericdmm: Failed to get device descriptor: %d.", tmp);
 251                         continue;
 252                 }
 253
 254                 if (libusb_get_bus_number(devlist[i]) != devc->usb->bus
 255                         || libusb_get_device_address(devlist[i]) != devc->usb->address)
 256                         /* this is not the one */
 257                         continue;
 258
 259                 if ((tmp = libusb_open(devlist[i], &devc->usb->devhdl))) {
 260                         sr_err("genericdmm: Failed to open device: %d.", tmp);
 261                         break;
 262                 }
 263
 264                 sr_info("genericdmm: Opened device %s on %d.%d ", devc->profile->modelid,
 265                                 devc->usb->bus, devc->usb->address);
 266                 ret = SR_OK;
 267                 break;
 268         }
 269         libusb_free_device_list(devlist, 1);
 270
 271         return ret;
 272 }
 273
 274 static int clear_instances(void)
 275 {
 276         GSList *l;
 277         struct sr_dev_inst *sdi;
 278         struct dev_context *devc;
 279         struct drv_context *drvc;
 280
 281         if (!(drvc = gdi->priv))
 282                 return SR_OK;
 283
 284         /* Properly close and free all devices. */
 285         for (l = drvc->instances; l; l = l->next) {
 286                 if (!(sdi = l->data)) {
 287                         /* Log error, but continue cleaning up the rest. */
 288                         sr_err("genericdmm: sdi was NULL, continuing.");
 289                         continue;
 290                 }
 291                 if (!(devc = sdi->priv)) {
 292                         /* Log error, but continue cleaning up the rest. */
 293                         sr_err("genericdmm: sdi->priv was NULL, continuing.");
 294                         continue;
 295                 }
 296
 297                 if (devc->profile) {
 298                         switch (devc->profile->transport) {
 299                         case DMM_TRANSPORT_USBHID:
 300                                 /* TODO */
 301                                 sr_usb_dev_inst_free(devc->usb);
 302                                 break;
 303                         case DMM_TRANSPORT_SERIAL:
 304                                 if (devc->serial && devc->serial->fd != -1)
 305                                         serial_close(devc->serial->fd);
 306                                 sr_serial_dev_inst_free(devc->serial);
 307                                 break;
 308                         }
 309                 }
 310
 311                 sr_dev_inst_free(sdi);
 312         }
 313
 314         g_slist_free(drvc->instances);
 315         drvc->instances = NULL;
 316
 317         return SR_OK;
 318 }
 319
 320 static int hw_init(void)
 321 {
 322         struct drv_context *drvc;
 323
 324         if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
 325                 sr_err("genericdmm: driver context malloc failed.");
 326                 return SR_ERR;
 327         }
 328
 329         if (libusb_init(&genericdmm_usb_context) != 0) {
 330                 sr_err("genericdmm: Failed to initialize USB.");
 331                 return SR_ERR;
 332         }
 333
 334         gdi->priv = drvc;
 335
 336         return SR_OK;
 337 }
 338
 339 static GSList *hw_scan(GSList *options)
 340 {
 341         GSList *l, *ldef, *defopts, *newopts, *devices;
 342         struct sr_hwopt *opt, *defopt;
 343         struct dev_profile *pr, *profile;
 344         struct sr_dev_inst *sdi;
 345         struct drv_context *drvc;
 346         struct dev_context *devc;
 347         const char *model;
 348
 349         drvc = gdi->priv;
 350
 351         /* Separate model from the options list. */
 352         model = NULL;
 353         newopts = NULL;
 354         for (l = options; l; l = l->next) {
 355                 opt = l->data;
 356                 if (opt->hwopt == SR_HWOPT_MODEL)
 357                         model = opt->value;
 358                 else
 359                         /* New list with references to the original data. */
 360                         newopts = g_slist_append(newopts, opt);
 361         }
 362         if (!model) {
 363                 /* This driver only works when a model is specified. */
 364                 return NULL;
 365         }
 366
 367         /* Find a profile with this model name. */
 368         profile = NULL;
 369         for (pr = dev_profiles; pr->modelid; pr++) {
 370                 if (!strcmp(pr->modelid, model)) {
 371                         profile = pr;
 372                         break;
 373                 }
 374         }
 375         if (!profile) {
 376                 sr_err("Unknown model %s.", model);
 377                 return NULL;
 378         }
 379
 380         /* Initialize the DMM chip driver. */
 381         if (profile->chip->init)
 382                 profile->chip->init();
 383
 384         /* Convert the profile's default options list to a GSList. */
 385         defopts = NULL;
 386         for (opt = profile->defaults_opts; opt->hwopt; opt++) {
 387                 /* New list with references to const data in the profile. */
 388                 defopts = g_slist_append(defopts, opt);
 389         }
 390
 391         /* Options given as argument to this function override the
 392          * profile's default options.
 393          */
 394         for (ldef = defopts; ldef; ldef = ldef->next) {
 395                 defopt = ldef->data;
 396                 for (l = newopts; l; l = l->next) {
 397                         opt = l->data;
 398                         if (opt->hwopt == defopt->hwopt) {
 399                                 /* Override the default, and drop it from the
 400                                  * options list.
 401                                  */
 402                                 ldef->data = l->data;
 403                                 newopts = g_slist_remove(newopts, opt);
 404                                 break;
 405                         }
 406                 }
 407         }
 408         /* Whatever is left in newopts wasn't in the default options. */
 409         defopts = g_slist_concat(defopts, newopts);
 410         g_slist_free(newopts);
 411
 412         if (profile->chip->scan)
 413                 /* The DMM chip driver wants to do its own scanning. */
 414                 devices = profile->chip->scan(defopts);
 415         else
 416                 devices = default_scan(defopts);
 417         g_slist_free(defopts);
 418
 419         if (devices) {
 420                 /* TODO: need to fix up sdi->index fields */
 421                 for (l = devices; l; l = l->next) {
 422                         /* The default connection-based scanner doesn't really
 423                          * know about profiles, so it never filled in the vendor
 424                          * or model. Do that now.
 425                          */
 426                         sdi = l->data;
 427                         devc = sdi->priv;
 428                         devc->profile = profile;
 429                         sdi->driver = gdi;
 430                         if (!sdi->vendor)
 431                                 sdi->vendor = g_strdup(profile->vendor);
 432                         if (!sdi->model)
 433                                 sdi->model = g_strdup(profile->model);
 434                         /* Add a copy of these new devices to the driver instances. */
 435                         drvc->instances = g_slist_append(drvc->instances, l->data);
 436                 }
 437         }
 438
 439         return devices;
 440 }
 441
 442 static GSList *hw_dev_list(void)
 443 {
 444         struct drv_context *drvc;
 445
 446         drvc = gdi->priv;
 447
 448         return drvc->instances;
 449 }
 450
 451 static int hw_dev_open(struct sr_dev_inst *sdi)
 452 {
 453         struct dev_context *devc;
 454         int ret;
 455
 456         if (!(devc = sdi->priv)) {
 457                 sr_err("genericdmm: sdi->priv was NULL.");
 458                 return SR_ERR_BUG;
 459         }
 460
 461         ret = SR_OK;
 462         switch (devc->profile->transport) {
 463         case DMM_TRANSPORT_USBHID:
 464                 ret = open_usb(sdi);
 465                 break;
 466         case DMM_TRANSPORT_SERIAL:
 467                 /* TODO: O_NONBLOCK? */
 468                 sr_dbg("genericdmm: Opening serial port '%s'.", devc->serial->port);
 469                 devc->serial->fd = serial_open(devc->serial->port, O_RDWR | O_NONBLOCK);
 470                 if (devc->serial->fd == -1) {
 471                         sr_err("genericdmm: Couldn't open serial port '%s'.",
 472                                devc->serial->port);
 473                         ret = SR_ERR;
 474                 }
 475                 //      serial_set_params(devc->serial->fd, 2400, 8, 0, 1, 2);
 476                 break;
 477         default:
 478                 sr_err("No transport set.");
 479                 ret = SR_ERR;
 480         }
 481
 482         return ret;
 483 }
 484
 485 static int hw_dev_close(struct sr_dev_inst *sdi)
 486 {
 487         struct dev_context *devc;
 488
 489         if (!(devc = sdi->priv)) {
 490                 sr_err("genericdmm: %s: sdi->priv was NULL.", __func__);
 491                 return SR_ERR_BUG;
 492         }
 493
 494         switch (devc->profile->transport) {
 495         case DMM_TRANSPORT_USBHID:
 496                 /* TODO */
 497                 break;
 498         case DMM_TRANSPORT_SERIAL:
 499                 if (devc->serial && devc->serial->fd != -1) {
 500                         serial_close(devc->serial->fd);
 501                         devc->serial->fd = -1;
 502                         sdi->status = SR_ST_INACTIVE;
 503                 }
 504                 break;
 505         }
 506
 507         return SR_OK;
 508 }
 509
 510 static int hw_cleanup(void)
 511 {
 512
 513         clear_instances();
 514
 515         if (genericdmm_usb_context)
 516                 libusb_exit(genericdmm_usb_context);
 517
 518         return SR_OK;
 519 }
 520
 521 static int hw_info_get(int info_id, const void **data,
 522                 const struct sr_dev_inst *sdi)
 523 {
 524         struct dev_context *devc;
 525
 526         (void)sdi;
 527         (void)devc;
 528
 529         switch (info_id) {
 530         case SR_DI_HWOPTS:
 531                 *data = hwopts;
 532                 break;
 533         case SR_DI_HWCAPS:
 534                 *data = hwcaps;
 535                 break;
 536         case SR_DI_NUM_PROBES:
 537                 *data = GINT_TO_POINTER(1);
 538                 break;
 539         case SR_DI_PROBE_NAMES:
 540                 *data = probe_names;
 541                 break;
 542         case SR_DI_CUR_SAMPLERATE:
 543                 /* TODO get rid of this */
 544                 *data = NULL;
 545                 return SR_ERR_ARG;
 546                 break;
 547         default:
 548                 /* Unknown device info ID. */
 549                 return SR_ERR_ARG;
 550         }
 551
 552         return SR_OK;
 553 }
 554
 555 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 556                 const void *value)
 557 {
 558         struct dev_context *devc;
 559
 560         if (!(devc = sdi->priv)) {
 561                 sr_err("genericdmm: sdi->priv was NULL.");
 562                 return SR_ERR_BUG;
 563         }
 564
 565         switch (hwcap) {
 566         case SR_HWCAP_LIMIT_MSEC:
 567                 /* TODO: not yet implemented */
 568                 if (*(const uint64_t *)value == 0) {
 569                         sr_err("genericdmm: LIMIT_MSEC can't be 0.");
 570                         return SR_ERR;
 571                 }
 572                 devc->limit_msec = *(const uint64_t *)value;
 573                 sr_dbg("genericdmm: Setting time limit to %" PRIu64 "ms.",
 574                        devc->limit_msec);
 575                 break;
 576         case SR_HWCAP_LIMIT_SAMPLES:
 577                 devc->limit_samples = *(const uint64_t *)value;
 578                 sr_dbg("genericdmm: Setting sample limit to %" PRIu64 ".",
 579                        devc->limit_samples);
 580                 break;
 581         default:
 582                 sr_err("genericdmm: Unknown capability: %d.", hwcap);
 583                 return SR_ERR;
 584                 break;
 585         }
 586
 587         return SR_OK;
 588 }
 589
 590 static int receive_data(int fd, int revents, void *cb_data)
 591 {
 592         struct sr_dev_inst *sdi;
 593         struct dev_context *devc;
 594
 595         (void)revents;
 596
 597         if (!(sdi = cb_data))
 598                 return TRUE;
 599
 600         if (!(devc = sdi->priv))
 601                 return TRUE;
 602
 603         switch (devc->profile->transport) {
 604         case DMM_TRANSPORT_USBHID:
 605                 if (devc->profile->chip->data)
 606                         devc->profile->chip->data(sdi);
 607                 break;
 608         case DMM_TRANSPORT_SERIAL:
 609                 /* TODO */
 610                 fd = fd;
 611                 break;
 612         }
 613
 614         if (devc->num_samples >= devc->limit_samples)
 615                 hw_dev_acquisition_stop(sdi, cb_data);
 616
 617         return TRUE;
 618 }
 619
 620 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 621                 void *cb_data)
 622 {
 623         struct sr_datafeed_packet packet;
 624         struct sr_datafeed_header header;
 625         struct sr_datafeed_meta_analog meta;
 626         struct dev_context *devc;
 627
 628         if (!(devc = sdi->priv)) {
 629                 sr_err("genericdmm: sdi->priv was NULL.");
 630                 return SR_ERR_BUG;
 631         }
 632
 633         sr_dbg("genericdmm: Starting acquisition.");
 634
 635         devc->cb_data = cb_data;
 636
 637         /* Send header packet to the session bus. */
 638         sr_dbg("genericdmm: Sending SR_DF_HEADER.");
 639         packet.type = SR_DF_HEADER;
 640         packet.payload = (uint8_t *)&header;
 641         header.feed_version = 1;
 642         gettimeofday(&header.starttime, NULL);
 643         sr_session_send(devc->cb_data, &packet);
 644
 645         /* Send metadata about the SR_DF_ANALOG packets to come. */
 646         sr_dbg("genericdmm: Sending SR_DF_META_ANALOG.");
 647         packet.type = SR_DF_META_ANALOG;
 648         packet.payload = &meta;
 649         meta.num_probes = 1;
 650         sr_session_send(devc->cb_data, &packet);
 651
 652         /* Hook up a proxy handler to receive data from the device. */
 653         switch (devc->profile->transport) {
 654         case DMM_TRANSPORT_USBHID:
 655                 /* Callously using stdin here. This works because no G_IO_* flags
 656                  * are set, but will certainly break when any other driver does
 657                  * this, and runs at the same time as genericdmm.
 658                  * We'll need a timeout-only source when revamping the whole
 659                  * driver source system.
 660                  */
 661                 sr_source_add(0, 0, devc->profile->poll_timeout,
 662                                 receive_data, (void *)sdi);
 663                 break;
 664         case DMM_TRANSPORT_SERIAL:
 665                 /* TODO serial FD setup */
 666                 // sr_source_add(devc->serial->fd, G_IO_IN, -1, receive_data, sdi);
 667                 break;
 668         }
 669
 670         return SR_OK;
 671 }
 672
 673 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
 674                 void *cb_data)
 675 {
 676         struct sr_datafeed_packet packet;
 677
 678         /* Avoid compiler warnings. */
 679         (void)sdi;
 680
 681         sr_dbg("genericdmm: Stopping acquisition.");
 682
 683         /* Send end packet to the session bus. */
 684         sr_dbg("genericdmm: Sending SR_DF_END.");
 685         packet.type = SR_DF_END;
 686         sr_session_send(cb_data, &packet);
 687
 688         sr_source_remove(0);
 689
 690         return SR_OK;
 691 }
 692
 693 SR_PRIV struct sr_dev_driver genericdmm_driver_info = {
 694         .name = "genericdmm",
 695         .longname = "Generic DMM",
 696         .api_version = 1,
 697         .init = hw_init,
 698         .cleanup = hw_cleanup,
 699         .scan = hw_scan,
 700         .dev_list = hw_dev_list,
 701         .dev_clear = clear_instances,
 702         .dev_open = hw_dev_open,
 703         .dev_close = hw_dev_close,
 704         .info_get = hw_info_get,
 705         .dev_config_set = hw_dev_config_set,
 706         .dev_acquisition_start = hw_dev_acquisition_start,
 707         .dev_acquisition_stop = hw_dev_acquisition_stop,
 708         .priv = NULL,
 709 };