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