hardware/zeroplus-logic-cube/zeroplus.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <sys/time.h>
  24 #include <inttypes.h>
  25 #include <glib.h>
  26 #include <libusb.h>
  27 #include "config.h"
  28 #include "libsigrok.h"
  29 #include "libsigrok-internal.h"
  30 #include "analyzer.h"
  31
  32 #define USB_VENDOR                      0x0c12
  33
  34 #define VENDOR_NAME                     "ZEROPLUS"
  35 #define MODEL_NAME                      "Logic Cube LAP-C"
  36 #define MODEL_VERSION                   NULL
  37
  38 #define NUM_PROBES                      16
  39 #define USB_INTERFACE                   0
  40 #define USB_CONFIGURATION               1
  41 #define NUM_TRIGGER_STAGES              4
  42 #define TRIGGER_TYPES                   "01"
  43
  44 #define PACKET_SIZE                     2048    /* ?? */
  45
  46 typedef struct {
  47         unsigned short vid;
  48         unsigned short pid;
  49         char *model_name;
  50         unsigned int channels;
  51         unsigned int sample_depth;      /* In Ksamples/channel */
  52         unsigned int max_sampling_freq;
  53 } model_t;
  54
  55 /*
  56  * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
  57  * same 128K sample depth.
  58  */
  59 static model_t zeroplus_models[] = {
  60         {0x0c12, 0x7009, "LAP-C(16064)",  16, 64,   100},
  61         {0x0c12, 0x700A, "LAP-C(16128)",  16, 128,  200},
  62         /* TODO: we don't know anything about these
  63         {0x0c12, 0x700B, "LAP-C(32128)",  32, 128,  200},
  64         {0x0c12, 0x700C, "LAP-C(321000)", 32, 1024, 200},
  65         {0x0c12, 0x700D, "LAP-C(322000)", 32, 2048, 200},
  66         */
  67         {0x0c12, 0x700E, "LAP-C(16032)",  16, 32,   100},
  68         {0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
  69         { 0, 0, 0, 0, 0, 0 }
  70 };
  71
  72 static const int hwcaps[] = {
  73         SR_HWCAP_LOGIC_ANALYZER,
  74         SR_HWCAP_SAMPLERATE,
  75         SR_HWCAP_CAPTURE_RATIO,
  76
  77         /* These are really implemented in the driver, not the hardware. */
  78         SR_HWCAP_LIMIT_SAMPLES,
  79         0,
  80 };
  81
  82 /*
  83  * ZEROPLUS LAP-C (16032) numbers the 16 probes A0-A7 and B0-B7.
  84  * We currently ignore other untested/unsupported devices here.
  85  */
  86 static const char *probe_names[NUM_PROBES + 1] = {
  87         "A0",
  88         "A1",
  89         "A2",
  90         "A3",
  91         "A4",
  92         "A5",
  93         "A6",
  94         "A7",
  95         "B0",
  96         "B1",
  97         "B2",
  98         "B3",
  99         "B4",
 100         "B5",
 101         "B6",
 102         "B7",
 103         NULL,
 104 };
 105
 106 /* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */
 107 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
 108 static struct sr_dev_driver *zdi = &zeroplus_logic_cube_driver_info;
 109
 110 static libusb_context *usb_context = NULL;
 111
 112 /*
 113  * The hardware supports more samplerates than these, but these are the
 114  * options hardcoded into the vendor's Windows GUI.
 115  */
 116
 117 /*
 118  * TODO: We shouldn't support 150MHz and 200MHz on devices that don't go up
 119  * that high.
 120  */
 121 static const uint64_t supported_samplerates[] = {
 122         SR_HZ(100),
 123         SR_HZ(500),
 124         SR_KHZ(1),
 125         SR_KHZ(5),
 126         SR_KHZ(25),
 127         SR_KHZ(50),
 128         SR_KHZ(100),
 129         SR_KHZ(200),
 130         SR_KHZ(400),
 131         SR_KHZ(800),
 132         SR_MHZ(1),
 133         SR_MHZ(10),
 134         SR_MHZ(25),
 135         SR_MHZ(50),
 136         SR_MHZ(80),
 137         SR_MHZ(100),
 138         SR_MHZ(150),
 139         SR_MHZ(200),
 140         0,
 141 };
 142
 143 static const struct sr_samplerates samplerates = {
 144         0,
 145         0,
 146         0,
 147         supported_samplerates,
 148 };
 149
 150 /* Private driver context. */
 151 struct drv_context {
 152         GSList *instances;
 153 };
 154
 155 /* Private, per-device-instance driver context. */
 156 struct dev_context {
 157         uint64_t cur_samplerate;
 158         uint64_t limit_samples;
 159         int num_channels; /* TODO: This isn't initialized before it's needed :( */
 160         uint64_t memory_size;
 161         uint8_t probe_mask;
 162         uint8_t trigger_mask[NUM_TRIGGER_STAGES];
 163         uint8_t trigger_value[NUM_TRIGGER_STAGES];
 164         // uint8_t trigger_buffer[NUM_TRIGGER_STAGES];
 165
 166         /* TODO: this belongs in the device instance */
 167         struct sr_usb_dev_inst *usb;
 168 };
 169
 170 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 171                 const void *value);
 172 static int hw_dev_close(struct sr_dev_inst *sdi);
 173
 174 static unsigned int get_memory_size(int type)
 175 {
 176         if (type == MEMORY_SIZE_8K)
 177                 return 8 * 1024;
 178         else if (type == MEMORY_SIZE_64K)
 179                 return 64 * 1024;
 180         else if (type == MEMORY_SIZE_128K)
 181                 return 128 * 1024;
 182         else if (type == MEMORY_SIZE_512K)
 183                 return 512 * 1024;
 184         else
 185                 return 0;
 186 }
 187
 188 static int configure_probes(const struct sr_dev_inst *sdi)
 189 {
 190         struct dev_context *devc;
 191         const struct sr_probe *probe;
 192         const GSList *l;
 193         int probe_bit, stage, i;
 194         char *tc;
 195
 196         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 197         devc = sdi->priv;
 198
 199         devc->probe_mask = 0;
 200         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 201                 devc->trigger_mask[i] = 0;
 202                 devc->trigger_value[i] = 0;
 203         }
 204
 205         stage = -1;
 206         for (l = sdi->probes; l; l = l->next) {
 207                 probe = (struct sr_probe *)l->data;
 208                 if (probe->enabled == FALSE)
 209                         continue;
 210                 probe_bit = 1 << (probe->index);
 211                 devc->probe_mask |= probe_bit;
 212
 213                 if (probe->trigger) {
 214                         stage = 0;
 215                         for (tc = probe->trigger; *tc; tc++) {
 216                                 devc->trigger_mask[stage] |= probe_bit;
 217                                 if (*tc == '1')
 218                                         devc->trigger_value[stage] |= probe_bit;
 219                                 stage++;
 220                                 if (stage > NUM_TRIGGER_STAGES)
 221                                         return SR_ERR;
 222                         }
 223                 }
 224         }
 225
 226         return SR_OK;
 227 }
 228
 229 static void clear_instances(void)
 230 {
 231         GSList *l;
 232         struct sr_dev_inst *sdi;
 233         struct drv_context *drvc;
 234         struct dev_context *devc;
 235
 236         drvc = zdi->priv;
 237         for (l = drvc->instances; l; l = l->next) {
 238                 sdi = l->data;
 239                 if (!(devc = sdi->priv)) {
 240                         /* Log error, but continue cleaning up the rest. */
 241                         sr_err("zeroplus: %s: sdi->priv was NULL, continuing", __func__);
 242                         continue;
 243                 }
 244                 sr_usb_dev_inst_free(devc->usb);
 245                 /* Properly close all devices... */
 246                 hw_dev_close(sdi);
 247                 /* ...and free all their memory. */
 248                 sr_dev_inst_free(sdi);
 249         }
 250         g_slist_free(drvc->instances);
 251         drvc->instances = NULL;
 252
 253 }
 254
 255 /*
 256  * API callbacks
 257  */
 258
 259 static int hw_init(void)
 260 {
 261         struct drv_context *drvc;
 262
 263         if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
 264                 sr_err("zeroplus: driver context malloc failed.");
 265                 return SR_ERR;
 266         }
 267         zdi->priv = drvc;
 268
 269         if (libusb_init(&usb_context) != 0) {
 270                 sr_err("zp: Failed to initialize USB.");
 271                 return 0;
 272         }
 273
 274         return SR_OK;
 275 }
 276
 277 static GSList *hw_scan(GSList *options)
 278 {
 279         struct sr_dev_inst *sdi;
 280         struct sr_probe *probe;
 281         struct drv_context *drvc;
 282         struct dev_context *devc;
 283         model_t *prof;
 284         struct libusb_device_descriptor des;
 285         libusb_device **devlist;
 286         GSList *devices;
 287         int ret, devcnt, i, j;
 288
 289         (void)options;
 290         drvc = zdi->priv;
 291         devices = NULL;
 292
 293         clear_instances();
 294
 295         /* Find all ZEROPLUS analyzers and add them to device list. */
 296         devcnt = 0;
 297         libusb_get_device_list(usb_context, &devlist); /* TODO: Errors. */
 298
 299         for (i = 0; devlist[i]; i++) {
 300                 ret = libusb_get_device_descriptor(devlist[i], &des);
 301                 if (ret != 0) {
 302                         sr_err("zp: failed to get device descriptor: %d", ret);
 303                         continue;
 304                 }
 305
 306                 prof = NULL;
 307                 for (j = 0; j < zeroplus_models[j].vid; j++) {
 308                         if (des.idVendor == zeroplus_models[j].vid &&
 309                                 des.idProduct == zeroplus_models[j].pid) {
 310                                 prof = &zeroplus_models[j];
 311                         }
 312                 }
 313                 /* Skip if the device was not found */
 314                 if (!prof)
 315                         continue;
 316                 sr_info("zp: Found ZEROPLUS model %s", prof->model_name);
 317
 318                 /* Register the device with libsigrok. */
 319                 if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE,
 320                                 VENDOR_NAME, prof->model_name, NULL))) {
 321                         sr_err("zp: %s: sr_dev_inst_new failed", __func__);
 322                         return NULL;
 323                 }
 324                 sdi->driver = zdi;
 325
 326                 /* Allocate memory for our private driver context. */
 327                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 328                         sr_err("zp: %s: devc malloc failed", __func__);
 329                         return 0;
 330                 }
 331                 sdi->priv = devc;
 332                 devc->num_channels = prof->channels;
 333                 devc->memory_size = prof->sample_depth * 1024;
 334                 // memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 335
 336                 /* Fill in probelist according to this device's profile. */
 337                 for (j = 0; j < devc->num_channels; j++) {
 338                         if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
 339                                         probe_names[j])))
 340                                 return NULL;
 341                         sdi->probes = g_slist_append(sdi->probes, probe);
 342                 }
 343
 344                 devices = g_slist_append(devices, sdi);
 345                 drvc->instances = g_slist_append(drvc->instances, sdi);
 346                 devc->usb = sr_usb_dev_inst_new(
 347                         libusb_get_bus_number(devlist[i]),
 348                         libusb_get_device_address(devlist[i]), NULL);
 349                 devcnt++;
 350
 351         }
 352         libusb_free_device_list(devlist, 1);
 353
 354         return devices;
 355 }
 356
 357 static int hw_dev_open(struct sr_dev_inst *sdi)
 358 {
 359         struct dev_context *devc;
 360         libusb_device **devlist, *dev;
 361         struct libusb_device_descriptor des;
 362         int device_count, ret, i;
 363
 364         if (!(devc = sdi->priv)) {
 365                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 366                 return SR_ERR_ARG;
 367         }
 368
 369         device_count = libusb_get_device_list(usb_context, &devlist);
 370         if (device_count < 0) {
 371                 sr_err("zp: Failed to retrieve device list");
 372                 return SR_ERR;
 373         }
 374
 375         dev = NULL;
 376         for (i = 0; i < device_count; i++) {
 377                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 378                         sr_err("fx2lafw: Failed to get device descriptor: %d.",
 379                                ret);
 380                         continue;
 381                 }
 382                 if (libusb_get_bus_number(devlist[i]) == devc->usb->bus
 383                     && libusb_get_device_address(devlist[i]) == devc->usb->address) {
 384                         dev = devlist[i];
 385                         break;
 386                 }
 387         }
 388         if (!dev) {
 389                 sr_err("device on bus %d address %d disappeared!",
 390                                 devc->usb->bus, devc->usb->address);
 391                 return SR_ERR;
 392         }
 393
 394         if (!(ret = libusb_open(dev, &(devc->usb->devhdl)))) {
 395                 sdi->status = SR_ST_ACTIVE;
 396                 sr_info("zp: opened device %d on %d.%d interface %d",
 397                         sdi->index, devc->usb->bus,
 398                         devc->usb->address, USB_INTERFACE);
 399         } else {
 400                 sr_err("zp: failed to open device: %d", ret);
 401                 return SR_ERR;
 402         }
 403
 404         ret = libusb_set_configuration(devc->usb->devhdl, USB_CONFIGURATION);
 405         if (ret < 0) {
 406                 sr_err("zp: Unable to set USB configuration %d: %d",
 407                        USB_CONFIGURATION, ret);
 408                 return SR_ERR;
 409         }
 410
 411         ret = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE);
 412         if (ret != 0) {
 413                 sr_err("zp: Unable to claim interface: %d", ret);
 414                 return SR_ERR;
 415         }
 416
 417         analyzer_reset(devc->usb->devhdl);
 418         analyzer_initialize(devc->usb->devhdl);
 419
 420         analyzer_set_memory_size(MEMORY_SIZE_512K);
 421         // analyzer_set_freq(g_freq, g_freq_scale);
 422         analyzer_set_trigger_count(1);
 423         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 424         // * get_memory_size(g_memory_size)) / 100) >> 2);
 425         analyzer_set_ramsize_trigger_address(
 426                 (100 * get_memory_size(MEMORY_SIZE_512K) / 100) >> 2);
 427
 428 #if 0
 429         if (g_double_mode == 1)
 430                 analyzer_set_compression(COMPRESSION_DOUBLE);
 431         else if (g_compression == 1)
 432                 analyzer_set_compression(COMPRESSION_ENABLE);
 433         else
 434 #endif
 435         analyzer_set_compression(COMPRESSION_NONE);
 436
 437         if (devc->cur_samplerate == 0) {
 438                 /* Samplerate hasn't been set. Default to the slowest one. */
 439                 if (hw_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
 440                      &samplerates.list[0]) == SR_ERR)
 441                         return SR_ERR;
 442         }
 443
 444         return SR_OK;
 445 }
 446
 447 static int hw_dev_close(struct sr_dev_inst *sdi)
 448 {
 449         struct dev_context *devc;
 450
 451         if (!(devc = sdi->priv)) {
 452                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 453                 return SR_ERR;
 454         }
 455
 456         if (!devc->usb->devhdl)
 457                 return SR_ERR;
 458
 459         sr_info("zp: closing device %d on %d.%d interface %d", sdi->index,
 460                 devc->usb->bus, devc->usb->address, USB_INTERFACE);
 461         libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
 462         libusb_reset_device(devc->usb->devhdl);
 463         libusb_close(devc->usb->devhdl);
 464         devc->usb->devhdl = NULL;
 465         sdi->status = SR_ST_INACTIVE;
 466
 467         return SR_OK;
 468 }
 469
 470 static int hw_cleanup(void)
 471 {
 472         struct drv_context *drvc;
 473
 474         if (!(drvc = zdi->priv))
 475                 return SR_OK;
 476
 477         clear_instances();
 478
 479         if (usb_context)
 480                 libusb_exit(usb_context);
 481         usb_context = NULL;
 482
 483         return SR_OK;
 484 }
 485
 486 static int hw_info_get(int info_id, const void **data,
 487        const struct sr_dev_inst *sdi)
 488 {
 489         struct dev_context *devc;
 490
 491         switch (info_id) {
 492         case SR_DI_HWCAPS:
 493                 *data = hwcaps;
 494                 break;
 495         case SR_DI_NUM_PROBES:
 496                 if (sdi) {
 497                         devc = sdi->priv;
 498                         *data = GINT_TO_POINTER(devc->num_channels);
 499                         sr_spew("zp: %s: Returning number of channels: %d.",
 500                                         __func__, devc->num_channels);
 501                 } else
 502                         return SR_ERR;
 503                 break;
 504         case SR_DI_PROBE_NAMES:
 505                 *data = probe_names;
 506                 sr_spew("zp: %s: Returning probenames.", __func__);
 507                 break;
 508         case SR_DI_SAMPLERATES:
 509                 *data = &samplerates;
 510                 sr_spew("zp: %s: Returning samplerates.", __func__);
 511                 break;
 512         case SR_DI_TRIGGER_TYPES:
 513                 *data = TRIGGER_TYPES;
 514                 sr_spew("zp: %s: Returning triggertypes: %s.", __func__, TRIGGER_TYPES);
 515                 break;
 516         case SR_DI_CUR_SAMPLERATE:
 517                 if (sdi) {
 518                         devc = sdi->priv;
 519                         *data = &devc->cur_samplerate;
 520                         sr_spew("zp: %s: Returning samplerate: %" PRIu64 "Hz.",
 521                                 __func__, devc->cur_samplerate);
 522                 } else
 523                         return SR_ERR;
 524                 break;
 525         default:
 526                 return SR_ERR_ARG;
 527         }
 528
 529         return SR_OK;
 530 }
 531
 532 static int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
 533 {
 534         struct dev_context *devc;
 535
 536         if (!sdi) {
 537                 sr_err("zp: %s: sdi was NULL", __func__);
 538                 return SR_ERR_ARG;
 539         }
 540
 541         if (!(devc = sdi->priv)) {
 542                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 543                 return SR_ERR_ARG;
 544         }
 545
 546         sr_info("zp: Setting samplerate to %" PRIu64 "Hz.", samplerate);
 547
 548         if (samplerate > SR_MHZ(1))
 549                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 550         else if (samplerate > SR_KHZ(1))
 551                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 552         else
 553                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 554
 555         devc->cur_samplerate = samplerate;
 556
 557         return SR_OK;
 558 }
 559
 560 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 561                 const void *value)
 562 {
 563         struct dev_context *devc;
 564
 565         if (!(devc = sdi->priv)) {
 566                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 567                 return SR_ERR_ARG;
 568         }
 569
 570         switch (hwcap) {
 571         case SR_HWCAP_SAMPLERATE:
 572                 return set_samplerate(sdi, *(const uint64_t *)value);
 573         case SR_HWCAP_LIMIT_SAMPLES:
 574                 devc->limit_samples = *(const uint64_t *)value;
 575                 return SR_OK;
 576         default:
 577                 return SR_ERR;
 578         }
 579 }
 580
 581 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 582                 void *cb_data)
 583 {
 584         struct sr_datafeed_packet packet;
 585         struct sr_datafeed_logic logic;
 586         struct sr_datafeed_header header;
 587         struct sr_datafeed_meta_logic meta;
 588         uint64_t samples_read;
 589         int res;
 590         unsigned int packet_num;
 591         unsigned char *buf;
 592         struct dev_context *devc;
 593
 594         if (!(devc = sdi->priv)) {
 595                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 596                 return SR_ERR_ARG;
 597         }
 598
 599         if (configure_probes(sdi) != SR_OK) {
 600                 sr_err("zp: failed to configured probes");
 601                 return SR_ERR;
 602         }
 603
 604         /* push configured settings to device */
 605         analyzer_configure(devc->usb->devhdl);
 606
 607         analyzer_start(devc->usb->devhdl);
 608         sr_info("zp: Waiting for data");
 609         analyzer_wait_data(devc->usb->devhdl);
 610
 611         sr_info("zp: Stop address    = 0x%x",
 612                 analyzer_get_stop_address(devc->usb->devhdl));
 613         sr_info("zp: Now address     = 0x%x",
 614                 analyzer_get_now_address(devc->usb->devhdl));
 615         sr_info("zp: Trigger address = 0x%x",
 616                 analyzer_get_trigger_address(devc->usb->devhdl));
 617
 618         packet.type = SR_DF_HEADER;
 619         packet.payload = &header;
 620         header.feed_version = 1;
 621         gettimeofday(&header.starttime, NULL);
 622         sr_session_send(cb_data, &packet);
 623
 624         /* Send metadata about the SR_DF_LOGIC packets to come. */
 625         packet.type = SR_DF_META_LOGIC;
 626         packet.payload = &meta;
 627         meta.samplerate = devc->cur_samplerate;
 628         meta.num_probes = devc->num_channels;
 629         sr_session_send(cb_data, &packet);
 630
 631         if (!(buf = g_try_malloc(PACKET_SIZE))) {
 632                 sr_err("zp: %s: buf malloc failed", __func__);
 633                 return SR_ERR_MALLOC;
 634         }
 635
 636         samples_read = 0;
 637         analyzer_read_start(devc->usb->devhdl);
 638         /* Send the incoming transfer to the session bus. */
 639         for (packet_num = 0; packet_num < (devc->memory_size * 4 / PACKET_SIZE);
 640              packet_num++) {
 641                 res = analyzer_read_data(devc->usb->devhdl, buf, PACKET_SIZE);
 642                 sr_info("zp: Tried to read %llx bytes, actually read %x bytes",
 643                         PACKET_SIZE, res);
 644
 645                 packet.type = SR_DF_LOGIC;
 646                 packet.payload = &logic;
 647                 logic.length = PACKET_SIZE;
 648                 logic.unitsize = 4;
 649                 logic.data = buf;
 650                 sr_session_send(cb_data, &packet);
 651                 samples_read += res / 4;
 652         }
 653         analyzer_read_stop(devc->usb->devhdl);
 654         g_free(buf);
 655
 656         packet.type = SR_DF_END;
 657         sr_session_send(cb_data, &packet);
 658
 659         return SR_OK;
 660 }
 661
 662 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
 663 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
 664                 void *cb_data)
 665 {
 666         struct sr_datafeed_packet packet;
 667         struct dev_context *devc;
 668
 669         packet.type = SR_DF_END;
 670         sr_session_send(cb_data, &packet);
 671
 672         if (!(devc = sdi->priv)) {
 673                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 674                 return SR_ERR_BUG;
 675         }
 676
 677         analyzer_reset(devc->usb->devhdl);
 678         /* TODO: Need to cancel and free any queued up transfers. */
 679
 680         return SR_OK;
 681 }
 682
 683 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info = {
 684         .name = "zeroplus-logic-cube",
 685         .longname = "ZEROPLUS Logic Cube LAP-C series",
 686         .api_version = 1,
 687         .init = hw_init,
 688         .cleanup = hw_cleanup,
 689         .scan = hw_scan,
 690         .dev_open = hw_dev_open,
 691         .dev_close = hw_dev_close,
 692         .info_get = hw_info_get,
 693         .dev_config_set = hw_dev_config_set,
 694         .dev_acquisition_start = hw_dev_acquisition_start,
 695         .dev_acquisition_stop = hw_dev_acquisition_stop,
 696         .priv = NULL,
 697 };