hardware/zeroplus-logic-cube/api.c

   1 /*
   2  * This file is part of the libsigrok 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 "protocol.h"
  21
  22 #define VENDOR_NAME                     "ZEROPLUS"
  23 #define USB_INTERFACE                   0
  24 #define USB_CONFIGURATION               1
  25 #define NUM_TRIGGER_STAGES              4
  26 #define TRIGGER_TYPE                    "01"
  27 #define PACKET_SIZE                     2048    /* ?? */
  28
  29 //#define ZP_EXPERIMENTAL
  30
  31 struct zp_model {
  32         uint16_t vid;
  33         uint16_t pid;
  34         char *model_name;
  35         unsigned int channels;
  36         unsigned int sample_depth;      /* In Ksamples/channel */
  37         unsigned int max_sampling_freq;
  38 };
  39
  40 /*
  41  * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
  42  * same 128K sample depth.
  43  */
  44 static const struct zp_model zeroplus_models[] = {
  45         {0x0c12, 0x7002, "LAP-16128U",    16, 128,  200},
  46         {0x0c12, 0x7009, "LAP-C(16064)",  16, 64,   100},
  47         {0x0c12, 0x700a, "LAP-C(16128)",  16, 128,  200},
  48         /* TODO: We don't know anything about these.
  49         {0x0c12, 0x700b, "LAP-C(32128)",  32, 128,  200},
  50         {0x0c12, 0x700c, "LAP-C(321000)", 32, 1024, 200},
  51         {0x0c12, 0x700d, "LAP-C(322000)", 32, 2048, 200},
  52         */
  53         {0x0c12, 0x700e, "LAP-C(16032)",  16, 32,   100},
  54         {0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
  55         { 0, 0, 0, 0, 0, 0 }
  56 };
  57
  58 static const int32_t hwcaps[] = {
  59         SR_CONF_LOGIC_ANALYZER,
  60         SR_CONF_SAMPLERATE,
  61         SR_CONF_CAPTURE_RATIO,
  62         SR_CONF_LIMIT_SAMPLES,
  63 };
  64
  65 /*
  66  * ZEROPLUS LAP-C (16032) numbers the 16 probes A0-A7 and B0-B7.
  67  * We currently ignore other untested/unsupported devices here.
  68  */
  69 static const char *probe_names[] = {
  70         "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  71         "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7",
  72         NULL,
  73 };
  74
  75 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
  76 static struct sr_dev_driver *di = &zeroplus_logic_cube_driver_info;
  77
  78 /*
  79  * The hardware supports more samplerates than these, but these are the
  80  * options hardcoded into the vendor's Windows GUI.
  81  */
  82
  83 static const uint64_t samplerates_100[] = {
  84         SR_HZ(100),
  85         SR_HZ(500),
  86         SR_KHZ(1),
  87         SR_KHZ(5),
  88         SR_KHZ(25),
  89         SR_KHZ(50),
  90         SR_KHZ(100),
  91         SR_KHZ(200),
  92         SR_KHZ(400),
  93         SR_KHZ(800),
  94         SR_MHZ(1),
  95         SR_MHZ(10),
  96         SR_MHZ(25),
  97         SR_MHZ(50),
  98         SR_MHZ(80),
  99         SR_MHZ(100),
 100 };
 101
 102 const uint64_t samplerates_200[] = {
 103         SR_HZ(100),
 104         SR_HZ(500),
 105         SR_KHZ(1),
 106         SR_KHZ(5),
 107         SR_KHZ(25),
 108         SR_KHZ(50),
 109         SR_KHZ(100),
 110         SR_KHZ(200),
 111         SR_KHZ(400),
 112         SR_KHZ(800),
 113         SR_MHZ(1),
 114         SR_MHZ(10),
 115         SR_MHZ(25),
 116         SR_MHZ(50),
 117         SR_MHZ(80),
 118         SR_MHZ(100),
 119         SR_MHZ(150),
 120         SR_MHZ(200),
 121 };
 122
 123 static int hw_dev_close(struct sr_dev_inst *sdi);
 124
 125 #if 0
 126 static int configure_probes(const struct sr_dev_inst *sdi)
 127 {
 128         struct dev_context *devc;
 129         const struct sr_probe *probe;
 130         const GSList *l;
 131         int probe_bit, stage, i;
 132         char *tc;
 133
 134         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 135         devc = sdi->priv;
 136
 137         devc->probe_mask = 0;
 138         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 139                 devc->trigger_mask[i] = 0;
 140                 devc->trigger_value[i] = 0;
 141         }
 142
 143         stage = -1;
 144         for (l = sdi->probes; l; l = l->next) {
 145                 probe = (struct sr_probe *)l->data;
 146                 if (probe->enabled == FALSE)
 147                         continue;
 148                 probe_bit = 1 << (probe->index);
 149                 devc->probe_mask |= probe_bit;
 150
 151                 if (probe->trigger) {
 152                         stage = 0;
 153                         for (tc = probe->trigger; *tc; tc++) {
 154                                 devc->trigger_mask[stage] |= probe_bit;
 155                                 if (*tc == '1')
 156                                         devc->trigger_value[stage] |= probe_bit;
 157                                 stage++;
 158                                 if (stage > NUM_TRIGGER_STAGES)
 159                                         return SR_ERR;
 160                         }
 161                 }
 162         }
 163
 164         return SR_OK;
 165 }
 166 #endif
 167
 168 static int configure_probes(const struct sr_dev_inst *sdi)
 169 {
 170         struct dev_context *devc;
 171         const GSList *l;
 172         const struct sr_probe *probe;
 173         char *tc;
 174         int type;
 175
 176         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 177         devc = sdi->priv;
 178
 179         for (l = sdi->probes; l; l = l->next) {
 180                 probe = (struct sr_probe *)l->data;
 181                 if (probe->enabled == FALSE)
 182                         continue;
 183
 184                 if ((tc = probe->trigger)) {
 185                         switch (*tc) {
 186                         case '1':
 187                                 type = TRIGGER_HIGH;
 188                                 break;
 189                         case '0':
 190                                 type = TRIGGER_LOW;
 191                                 break;
 192 #if 0
 193                         case 'r':
 194                                 type = TRIGGER_POSEDGE;
 195                                 break;
 196                         case 'f':
 197                                 type = TRIGGER_NEGEDGE;
 198                                 break;
 199                         case 'c':
 200                                 type = TRIGGER_ANYEDGE;
 201                                 break;
 202 #endif
 203                         default:
 204                                 return SR_ERR;
 205                         }
 206                         analyzer_add_trigger(probe->index, type);
 207                         devc->trigger = 1;
 208                 }
 209         }
 210
 211         return SR_OK;
 212 }
 213
 214 SR_PRIV int zp_set_samplerate(struct dev_context *devc, uint64_t samplerate)
 215 {
 216         int i;
 217
 218         for (i = 0; ARRAY_SIZE(samplerates_200); i++)
 219                 if (samplerate == samplerates_200[i])
 220                         break;
 221
 222         if (i == ARRAY_SIZE(samplerates_200) || samplerate > devc->max_samplerate) {
 223                 sr_err("Unsupported samplerate: %" PRIu64 "Hz.", samplerate);
 224                 return SR_ERR_ARG;
 225         }
 226
 227         sr_info("Setting samplerate to %" PRIu64 "Hz.", samplerate);
 228
 229         if (samplerate >= SR_MHZ(1))
 230                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 231         else if (samplerate >= SR_KHZ(1))
 232                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 233         else
 234                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 235
 236         devc->cur_samplerate = samplerate;
 237
 238         return SR_OK;
 239 }
 240
 241 static int clear_instances(void)
 242 {
 243         GSList *l;
 244         struct sr_dev_inst *sdi;
 245         struct drv_context *drvc;
 246         struct dev_context *devc;
 247         struct sr_usb_dev_inst *usb;
 248
 249         drvc = di->priv;
 250         for (l = drvc->instances; l; l = l->next) {
 251                 sdi = l->data;
 252                 if (!(devc = sdi->priv)) {
 253                         /* Log error, but continue cleaning up the rest. */
 254                         sr_err("%s: sdi->priv was NULL, continuing", __func__);
 255                         continue;
 256                 }
 257                 usb = sdi->conn;
 258                 sr_usb_dev_inst_free(usb);
 259                 /* Properly close all devices... */
 260                 hw_dev_close(sdi);
 261                 /* ...and free all their memory. */
 262                 sr_dev_inst_free(sdi);
 263         }
 264         g_slist_free(drvc->instances);
 265         drvc->instances = NULL;
 266
 267         return SR_OK;
 268 }
 269
 270 static int hw_init(struct sr_context *sr_ctx)
 271 {
 272         return std_hw_init(sr_ctx, di, "zeroplus: ");
 273 }
 274
 275 static GSList *hw_scan(GSList *options)
 276 {
 277         struct sr_dev_inst *sdi;
 278         struct sr_probe *probe;
 279         struct drv_context *drvc;
 280         struct dev_context *devc;
 281         const struct zp_model *prof;
 282         struct libusb_device_descriptor des;
 283         libusb_device **devlist;
 284         GSList *devices;
 285         int ret, devcnt, i, j;
 286
 287         (void)options;
 288
 289         drvc = di->priv;
 290
 291         devices = NULL;
 292
 293         /* Find all ZEROPLUS analyzers and add them to device list. */
 294         devcnt = 0;
 295         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); /* TODO: Errors. */
 296
 297         for (i = 0; devlist[i]; i++) {
 298                 ret = libusb_get_device_descriptor(devlist[i], &des);
 299                 if (ret != 0) {
 300                         sr_err("Failed to get device descriptor: %s.",
 301                                libusb_error_name(ret));
 302                         continue;
 303                 }
 304
 305                 prof = NULL;
 306                 for (j = 0; j < zeroplus_models[j].vid; j++) {
 307                         if (des.idVendor == zeroplus_models[j].vid &&
 308                                 des.idProduct == zeroplus_models[j].pid) {
 309                                 prof = &zeroplus_models[j];
 310                         }
 311                 }
 312                 /* Skip if the device was not found. */
 313                 if (!prof)
 314                         continue;
 315                 sr_info("Found ZEROPLUS %s.", prof->model_name);
 316
 317                 /* Register the device with libsigrok. */
 318                 if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE,
 319                                 VENDOR_NAME, prof->model_name, NULL))) {
 320                         sr_err("%s: sr_dev_inst_new failed", __func__);
 321                         return NULL;
 322                 }
 323                 sdi->driver = di;
 324
 325                 /* Allocate memory for our private driver context. */
 326                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 327                         sr_err("Device context malloc failed.");
 328                         return NULL;
 329                 }
 330
 331                 sdi->priv = devc;
 332                 devc->prof = prof;
 333                 devc->num_channels = prof->channels;
 334 #ifdef ZP_EXPERIMENTAL
 335                 devc->max_memory_size = 128 * 1024;
 336                 devc->max_samplerate = 200;
 337 #else
 338                 devc->max_memory_size = prof->sample_depth * 1024;
 339                 devc->max_samplerate = prof->max_sampling_freq;
 340 #endif
 341                 devc->max_samplerate *= SR_MHZ(1);
 342                 devc->memory_size = MEMORY_SIZE_8K;
 343                 // memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 344
 345                 /* Fill in probelist according to this device's profile. */
 346                 for (j = 0; j < devc->num_channels; j++) {
 347                         if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
 348                                         probe_names[j])))
 349                                 return NULL;
 350                         sdi->probes = g_slist_append(sdi->probes, probe);
 351                 }
 352
 353                 devices = g_slist_append(devices, sdi);
 354                 drvc->instances = g_slist_append(drvc->instances, sdi);
 355                 sdi->conn = sr_usb_dev_inst_new(
 356                         libusb_get_bus_number(devlist[i]),
 357                         libusb_get_device_address(devlist[i]), NULL);
 358                 devcnt++;
 359
 360         }
 361         libusb_free_device_list(devlist, 1);
 362
 363         return devices;
 364 }
 365
 366 static GSList *hw_dev_list(void)
 367 {
 368         return ((struct drv_context *)(di->priv))->instances;
 369 }
 370
 371 static int hw_dev_open(struct sr_dev_inst *sdi)
 372 {
 373         struct dev_context *devc;
 374         struct drv_context *drvc;
 375         struct sr_usb_dev_inst *usb;
 376         libusb_device **devlist, *dev;
 377         struct libusb_device_descriptor des;
 378         int device_count, ret, i;
 379
 380         drvc = di->priv;
 381         usb = sdi->conn;
 382
 383         if (!(devc = sdi->priv)) {
 384                 sr_err("%s: sdi->priv was NULL", __func__);
 385                 return SR_ERR_ARG;
 386         }
 387
 388         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx,
 389                                               &devlist);
 390         if (device_count < 0) {
 391                 sr_err("Failed to retrieve device list.");
 392                 return SR_ERR;
 393         }
 394
 395         dev = NULL;
 396         for (i = 0; i < device_count; i++) {
 397                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 398                         sr_err("Failed to get device descriptor: %s.",
 399                                libusb_error_name(ret));
 400                         continue;
 401                 }
 402                 if (libusb_get_bus_number(devlist[i]) == usb->bus
 403                     && libusb_get_device_address(devlist[i]) == usb->address) {
 404                         dev = devlist[i];
 405                         break;
 406                 }
 407         }
 408         if (!dev) {
 409                 sr_err("Device on bus %d address %d disappeared!",
 410                        usb->bus, usb->address);
 411                 return SR_ERR;
 412         }
 413
 414         if (!(ret = libusb_open(dev, &(usb->devhdl)))) {
 415                 sdi->status = SR_ST_ACTIVE;
 416                 sr_info("Opened device %d on %d.%d interface %d.",
 417                         sdi->index, usb->bus, usb->address, USB_INTERFACE);
 418         } else {
 419                 sr_err("Failed to open device: %s.", libusb_error_name(ret));
 420                 return SR_ERR;
 421         }
 422
 423         ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION);
 424         if (ret < 0) {
 425                 sr_err("Unable to set USB configuration %d: %s.",
 426                        USB_CONFIGURATION, libusb_error_name(ret));
 427                 return SR_ERR;
 428         }
 429
 430         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 431         if (ret != 0) {
 432                 sr_err("Unable to claim interface: %s.",
 433                        libusb_error_name(ret));
 434                 return SR_ERR;
 435         }
 436
 437         /* Set default configuration after power on. */
 438         if (analyzer_read_status(usb->devhdl) == 0)
 439                 analyzer_configure(usb->devhdl);
 440
 441         analyzer_reset(usb->devhdl);
 442         analyzer_initialize(usb->devhdl);
 443
 444         //analyzer_set_memory_size(MEMORY_SIZE_512K);
 445         // analyzer_set_freq(g_freq, g_freq_scale);
 446         analyzer_set_trigger_count(1);
 447         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 448         // * get_memory_size(g_memory_size)) / 100) >> 2);
 449
 450 #if 0
 451         if (g_double_mode == 1)
 452                 analyzer_set_compression(COMPRESSION_DOUBLE);
 453         else if (g_compression == 1)
 454                 analyzer_set_compression(COMPRESSION_ENABLE);
 455         else
 456 #endif
 457         analyzer_set_compression(COMPRESSION_NONE);
 458
 459         if (devc->cur_samplerate == 0) {
 460                 /* Samplerate hasn't been set. Default to 1MHz. */
 461                 analyzer_set_freq(1, FREQ_SCALE_MHZ);
 462                 devc->cur_samplerate = SR_MHZ(1);
 463         }
 464
 465         return SR_OK;
 466 }
 467
 468 static int hw_dev_close(struct sr_dev_inst *sdi)
 469 {
 470         struct sr_usb_dev_inst *usb;
 471
 472         usb = sdi->conn;
 473
 474         if (!usb->devhdl)
 475                 return SR_ERR;
 476
 477         sr_info("Closing device %d on %d.%d interface %d.", sdi->index,
 478                 usb->bus, usb->address, USB_INTERFACE);
 479         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 480         libusb_reset_device(usb->devhdl);
 481         libusb_close(usb->devhdl);
 482         usb->devhdl = NULL;
 483         sdi->status = SR_ST_INACTIVE;
 484
 485         return SR_OK;
 486 }
 487
 488 static int hw_cleanup(void)
 489 {
 490         struct drv_context *drvc;
 491
 492         if (!(drvc = di->priv))
 493                 return SR_OK;
 494
 495         clear_instances();
 496
 497         return SR_OK;
 498 }
 499
 500 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
 501 {
 502         struct dev_context *devc;
 503
 504         switch (id) {
 505         case SR_CONF_SAMPLERATE:
 506                 if (sdi) {
 507                         devc = sdi->priv;
 508                         *data = g_variant_new_uint64(devc->cur_samplerate);
 509                         sr_spew("Returning samplerate: %" PRIu64 "Hz.",
 510                                 devc->cur_samplerate);
 511                 } else
 512                         return SR_ERR;
 513                 break;
 514         default:
 515                 return SR_ERR_NA;
 516         }
 517
 518         return SR_OK;
 519 }
 520
 521 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
 522 {
 523         struct dev_context *devc;
 524
 525         if (sdi->status != SR_ST_ACTIVE)
 526                 return SR_ERR_DEV_CLOSED;
 527
 528         if (!(devc = sdi->priv)) {
 529                 sr_err("%s: sdi->priv was NULL", __func__);
 530                 return SR_ERR_ARG;
 531         }
 532
 533         switch (id) {
 534         case SR_CONF_SAMPLERATE:
 535                 return zp_set_samplerate(devc, g_variant_get_uint64(data));
 536         case SR_CONF_LIMIT_SAMPLES:
 537                 return set_limit_samples(devc, g_variant_get_uint64(data));
 538         case SR_CONF_CAPTURE_RATIO:
 539                 return set_capture_ratio(devc, g_variant_get_uint64(data));
 540         default:
 541                 return SR_ERR_NA;
 542         }
 543
 544         return SR_OK;
 545 }
 546
 547 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
 548 {
 549         struct dev_context *devc;
 550         GVariant *gvar;
 551         GVariantBuilder gvb;
 552
 553         switch (key) {
 554         case SR_CONF_DEVICE_OPTIONS:
 555                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 556                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 557                 break;
 558         case SR_CONF_SAMPLERATE:
 559                 devc = sdi->priv;
 560                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 561                 if (devc->prof->max_sampling_freq == 100) {
 562                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 563                                         samplerates_100, ARRAY_SIZE(samplerates_100),
 564                                         sizeof(uint64_t));
 565                 } else if (devc->prof->max_sampling_freq == 200) {
 566                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 567                                         samplerates_200, ARRAY_SIZE(samplerates_200),
 568                                         sizeof(uint64_t));
 569                 } else {
 570                         sr_err("Internal error: Unknown max. samplerate: %d.",
 571                                devc->prof->max_sampling_freq);
 572                         return SR_ERR_ARG;
 573                 }
 574                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 575                 *data = g_variant_builder_end(&gvb);
 576                 break;
 577         case SR_CONF_TRIGGER_TYPE:
 578                 *data = g_variant_new_string(TRIGGER_TYPE);
 579                 break;
 580         default:
 581                 return SR_ERR_NA;
 582         }
 583
 584         return SR_OK;
 585 }
 586
 587 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 588                 void *cb_data)
 589 {
 590         struct dev_context *devc;
 591         struct sr_usb_dev_inst *usb;
 592         struct sr_datafeed_packet packet;
 593         struct sr_datafeed_logic logic;
 594         //uint64_t samples_read;
 595         int res;
 596         unsigned int packet_num, n;
 597         unsigned char *buf;
 598
 599         if (sdi->status != SR_ST_ACTIVE)
 600                 return SR_ERR_DEV_CLOSED;
 601
 602         if (!(devc = sdi->priv)) {
 603                 sr_err("%s: sdi->priv was NULL", __func__);
 604                 return SR_ERR_ARG;
 605         }
 606
 607         if (configure_probes(sdi) != SR_OK) {
 608                 sr_err("Failed to configure probes.");
 609                 return SR_ERR;
 610         }
 611
 612         usb = sdi->conn;
 613
 614         set_triggerbar(devc);
 615
 616         /* Push configured settings to device. */
 617         analyzer_configure(usb->devhdl);
 618
 619         analyzer_start(usb->devhdl);
 620         sr_info("Waiting for data.");
 621         analyzer_wait_data(usb->devhdl);
 622
 623         sr_info("Stop address    = 0x%x.",
 624                 analyzer_get_stop_address(usb->devhdl));
 625         sr_info("Now address     = 0x%x.",
 626                 analyzer_get_now_address(usb->devhdl));
 627         sr_info("Trigger address = 0x%x.",
 628                 analyzer_get_trigger_address(usb->devhdl));
 629
 630         /* Send header packet to the session bus. */
 631         std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
 632
 633         if (!(buf = g_try_malloc(PACKET_SIZE))) {
 634                 sr_err("Packet buffer malloc failed.");
 635                 return SR_ERR_MALLOC;
 636         }
 637
 638         //samples_read = 0;
 639         analyzer_read_start(usb->devhdl);
 640         /* Send the incoming transfer to the session bus. */
 641         n = get_memory_size(devc->memory_size);
 642         if (devc->max_memory_size * 4 < n)
 643                 n = devc->max_memory_size * 4;
 644         for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
 645                 res = analyzer_read_data(usb->devhdl, buf, PACKET_SIZE);
 646                 sr_info("Tried to read %d bytes, actually read %d bytes.",
 647                         PACKET_SIZE, res);
 648
 649                 packet.type = SR_DF_LOGIC;
 650                 packet.payload = &logic;
 651                 logic.length = PACKET_SIZE;
 652                 logic.unitsize = 4;
 653                 logic.data = buf;
 654                 sr_session_send(cb_data, &packet);
 655                 //samples_read += res / 4;
 656         }
 657         analyzer_read_stop(usb->devhdl);
 658         g_free(buf);
 659
 660         packet.type = SR_DF_END;
 661         sr_session_send(cb_data, &packet);
 662
 663         return SR_OK;
 664 }
 665
 666 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
 667 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 668 {
 669         struct dev_context *devc;
 670         struct sr_usb_dev_inst *usb;
 671         struct sr_datafeed_packet packet;
 672
 673         packet.type = SR_DF_END;
 674         sr_session_send(cb_data, &packet);
 675
 676         if (!(devc = sdi->priv)) {
 677                 sr_err("%s: sdi->priv was NULL", __func__);
 678                 return SR_ERR_BUG;
 679         }
 680
 681         usb = sdi->conn;
 682         analyzer_reset(usb->devhdl);
 683         /* TODO: Need to cancel and free any queued up transfers. */
 684
 685         return SR_OK;
 686 }
 687
 688 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info = {
 689         .name = "zeroplus-logic-cube",
 690         .longname = "ZEROPLUS Logic Cube LAP-C series",
 691         .api_version = 1,
 692         .init = hw_init,
 693         .cleanup = hw_cleanup,
 694         .scan = hw_scan,
 695         .dev_list = hw_dev_list,
 696         .dev_clear = hw_cleanup,
 697         .config_get = config_get,
 698         .config_set = config_set,
 699         .config_list = config_list,
 700         .dev_open = hw_dev_open,
 701         .dev_close = hw_dev_close,
 702         .dev_acquisition_start = hw_dev_acquisition_start,
 703         .dev_acquisition_stop = hw_dev_acquisition_stop,
 704         .priv = NULL,
 705 };