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 int 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         return SR_OK;
 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 GSList *hw_dev_list(void)
 359 {
 360         struct drv_context *drvc;
 361
 362         drvc = zdi->priv;
 363
 364         return drvc->instances;
 365 }
 366
 367 static int hw_dev_open(struct sr_dev_inst *sdi)
 368 {
 369         struct dev_context *devc;
 370         libusb_device **devlist, *dev;
 371         struct libusb_device_descriptor des;
 372         int device_count, ret, i;
 373
 374         if (!(devc = sdi->priv)) {
 375                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 376                 return SR_ERR_ARG;
 377         }
 378
 379         device_count = libusb_get_device_list(usb_context, &devlist);
 380         if (device_count < 0) {
 381                 sr_err("zp: Failed to retrieve device list");
 382                 return SR_ERR;
 383         }
 384
 385         dev = NULL;
 386         for (i = 0; i < device_count; i++) {
 387                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 388                         sr_err("fx2lafw: Failed to get device descriptor: %d.",
 389                                ret);
 390                         continue;
 391                 }
 392                 if (libusb_get_bus_number(devlist[i]) == devc->usb->bus
 393                     && libusb_get_device_address(devlist[i]) == devc->usb->address) {
 394                         dev = devlist[i];
 395                         break;
 396                 }
 397         }
 398         if (!dev) {
 399                 sr_err("device on bus %d address %d disappeared!",
 400                                 devc->usb->bus, devc->usb->address);
 401                 return SR_ERR;
 402         }
 403
 404         if (!(ret = libusb_open(dev, &(devc->usb->devhdl)))) {
 405                 sdi->status = SR_ST_ACTIVE;
 406                 sr_info("zp: opened device %d on %d.%d interface %d",
 407                         sdi->index, devc->usb->bus,
 408                         devc->usb->address, USB_INTERFACE);
 409         } else {
 410                 sr_err("zp: failed to open device: %d", ret);
 411                 return SR_ERR;
 412         }
 413
 414         ret = libusb_set_configuration(devc->usb->devhdl, USB_CONFIGURATION);
 415         if (ret < 0) {
 416                 sr_err("zp: Unable to set USB configuration %d: %d",
 417                        USB_CONFIGURATION, ret);
 418                 return SR_ERR;
 419         }
 420
 421         ret = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE);
 422         if (ret != 0) {
 423                 sr_err("zp: Unable to claim interface: %d", ret);
 424                 return SR_ERR;
 425         }
 426
 427         analyzer_reset(devc->usb->devhdl);
 428         analyzer_initialize(devc->usb->devhdl);
 429
 430         analyzer_set_memory_size(MEMORY_SIZE_512K);
 431         // analyzer_set_freq(g_freq, g_freq_scale);
 432         analyzer_set_trigger_count(1);
 433         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 434         // * get_memory_size(g_memory_size)) / 100) >> 2);
 435         analyzer_set_ramsize_trigger_address(
 436                 (100 * get_memory_size(MEMORY_SIZE_512K) / 100) >> 2);
 437
 438 #if 0
 439         if (g_double_mode == 1)
 440                 analyzer_set_compression(COMPRESSION_DOUBLE);
 441         else if (g_compression == 1)
 442                 analyzer_set_compression(COMPRESSION_ENABLE);
 443         else
 444 #endif
 445         analyzer_set_compression(COMPRESSION_NONE);
 446
 447         if (devc->cur_samplerate == 0) {
 448                 /* Samplerate hasn't been set. Default to the slowest one. */
 449                 if (hw_dev_config_set(sdi, SR_HWCAP_SAMPLERATE,
 450                      &samplerates.list[0]) == SR_ERR)
 451                         return SR_ERR;
 452         }
 453
 454         return SR_OK;
 455 }
 456
 457 static int hw_dev_close(struct sr_dev_inst *sdi)
 458 {
 459         struct dev_context *devc;
 460
 461         if (!(devc = sdi->priv)) {
 462                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 463                 return SR_ERR;
 464         }
 465
 466         if (!devc->usb->devhdl)
 467                 return SR_ERR;
 468
 469         sr_info("zp: closing device %d on %d.%d interface %d", sdi->index,
 470                 devc->usb->bus, devc->usb->address, USB_INTERFACE);
 471         libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
 472         libusb_reset_device(devc->usb->devhdl);
 473         libusb_close(devc->usb->devhdl);
 474         devc->usb->devhdl = NULL;
 475         sdi->status = SR_ST_INACTIVE;
 476
 477         return SR_OK;
 478 }
 479
 480 static int hw_cleanup(void)
 481 {
 482         struct drv_context *drvc;
 483
 484         if (!(drvc = zdi->priv))
 485                 return SR_OK;
 486
 487         clear_instances();
 488
 489         if (usb_context)
 490                 libusb_exit(usb_context);
 491         usb_context = NULL;
 492
 493         return SR_OK;
 494 }
 495
 496 static int hw_info_get(int info_id, const void **data,
 497        const struct sr_dev_inst *sdi)
 498 {
 499         struct dev_context *devc;
 500
 501         switch (info_id) {
 502         case SR_DI_HWCAPS:
 503                 *data = hwcaps;
 504                 break;
 505         case SR_DI_NUM_PROBES:
 506                 if (sdi) {
 507                         devc = sdi->priv;
 508                         *data = GINT_TO_POINTER(devc->num_channels);
 509                         sr_spew("zp: %s: Returning number of channels: %d.",
 510                                         __func__, devc->num_channels);
 511                 } else
 512                         return SR_ERR;
 513                 break;
 514         case SR_DI_PROBE_NAMES:
 515                 *data = probe_names;
 516                 sr_spew("zp: %s: Returning probenames.", __func__);
 517                 break;
 518         case SR_DI_SAMPLERATES:
 519                 *data = &samplerates;
 520                 sr_spew("zp: %s: Returning samplerates.", __func__);
 521                 break;
 522         case SR_DI_TRIGGER_TYPES:
 523                 *data = TRIGGER_TYPES;
 524                 sr_spew("zp: %s: Returning triggertypes: %s.", __func__, TRIGGER_TYPES);
 525                 break;
 526         case SR_DI_CUR_SAMPLERATE:
 527                 if (sdi) {
 528                         devc = sdi->priv;
 529                         *data = &devc->cur_samplerate;
 530                         sr_spew("zp: %s: Returning samplerate: %" PRIu64 "Hz.",
 531                                 __func__, devc->cur_samplerate);
 532                 } else
 533                         return SR_ERR;
 534                 break;
 535         default:
 536                 return SR_ERR_ARG;
 537         }
 538
 539         return SR_OK;
 540 }
 541
 542 static int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
 543 {
 544         struct dev_context *devc;
 545
 546         if (!sdi) {
 547                 sr_err("zp: %s: sdi was NULL", __func__);
 548                 return SR_ERR_ARG;
 549         }
 550
 551         if (!(devc = sdi->priv)) {
 552                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 553                 return SR_ERR_ARG;
 554         }
 555
 556         sr_info("zp: Setting samplerate to %" PRIu64 "Hz.", samplerate);
 557
 558         if (samplerate > SR_MHZ(1))
 559                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 560         else if (samplerate > SR_KHZ(1))
 561                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 562         else
 563                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 564
 565         devc->cur_samplerate = samplerate;
 566
 567         return SR_OK;
 568 }
 569
 570 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 571                 const void *value)
 572 {
 573         struct dev_context *devc;
 574
 575         if (!(devc = sdi->priv)) {
 576                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 577                 return SR_ERR_ARG;
 578         }
 579
 580         switch (hwcap) {
 581         case SR_HWCAP_SAMPLERATE:
 582                 return set_samplerate(sdi, *(const uint64_t *)value);
 583         case SR_HWCAP_LIMIT_SAMPLES:
 584                 devc->limit_samples = *(const uint64_t *)value;
 585                 return SR_OK;
 586         default:
 587                 return SR_ERR;
 588         }
 589 }
 590
 591 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 592                 void *cb_data)
 593 {
 594         struct sr_datafeed_packet packet;
 595         struct sr_datafeed_logic logic;
 596         struct sr_datafeed_header header;
 597         struct sr_datafeed_meta_logic meta;
 598         uint64_t samples_read;
 599         int res;
 600         unsigned int packet_num;
 601         unsigned char *buf;
 602         struct dev_context *devc;
 603
 604         if (!(devc = sdi->priv)) {
 605                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 606                 return SR_ERR_ARG;
 607         }
 608
 609         if (configure_probes(sdi) != SR_OK) {
 610                 sr_err("zp: failed to configured probes");
 611                 return SR_ERR;
 612         }
 613
 614         /* push configured settings to device */
 615         analyzer_configure(devc->usb->devhdl);
 616
 617         analyzer_start(devc->usb->devhdl);
 618         sr_info("zp: Waiting for data");
 619         analyzer_wait_data(devc->usb->devhdl);
 620
 621         sr_info("zp: Stop address    = 0x%x",
 622                 analyzer_get_stop_address(devc->usb->devhdl));
 623         sr_info("zp: Now address     = 0x%x",
 624                 analyzer_get_now_address(devc->usb->devhdl));
 625         sr_info("zp: Trigger address = 0x%x",
 626                 analyzer_get_trigger_address(devc->usb->devhdl));
 627
 628         packet.type = SR_DF_HEADER;
 629         packet.payload = &header;
 630         header.feed_version = 1;
 631         gettimeofday(&header.starttime, NULL);
 632         sr_session_send(cb_data, &packet);
 633
 634         /* Send metadata about the SR_DF_LOGIC packets to come. */
 635         packet.type = SR_DF_META_LOGIC;
 636         packet.payload = &meta;
 637         meta.samplerate = devc->cur_samplerate;
 638         meta.num_probes = devc->num_channels;
 639         sr_session_send(cb_data, &packet);
 640
 641         if (!(buf = g_try_malloc(PACKET_SIZE))) {
 642                 sr_err("zp: %s: buf malloc failed", __func__);
 643                 return SR_ERR_MALLOC;
 644         }
 645
 646         samples_read = 0;
 647         analyzer_read_start(devc->usb->devhdl);
 648         /* Send the incoming transfer to the session bus. */
 649         for (packet_num = 0; packet_num < (devc->memory_size * 4 / PACKET_SIZE);
 650              packet_num++) {
 651                 res = analyzer_read_data(devc->usb->devhdl, buf, PACKET_SIZE);
 652                 sr_info("zp: Tried to read %llx bytes, actually read %x bytes",
 653                         PACKET_SIZE, res);
 654
 655                 packet.type = SR_DF_LOGIC;
 656                 packet.payload = &logic;
 657                 logic.length = PACKET_SIZE;
 658                 logic.unitsize = 4;
 659                 logic.data = buf;
 660                 sr_session_send(cb_data, &packet);
 661                 samples_read += res / 4;
 662         }
 663         analyzer_read_stop(devc->usb->devhdl);
 664         g_free(buf);
 665
 666         packet.type = SR_DF_END;
 667         sr_session_send(cb_data, &packet);
 668
 669         return SR_OK;
 670 }
 671
 672 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
 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         struct dev_context *devc;
 678
 679         packet.type = SR_DF_END;
 680         sr_session_send(cb_data, &packet);
 681
 682         if (!(devc = sdi->priv)) {
 683                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 684                 return SR_ERR_BUG;
 685         }
 686
 687         analyzer_reset(devc->usb->devhdl);
 688         /* TODO: Need to cancel and free any queued up transfers. */
 689
 690         return SR_OK;
 691 }
 692
 693 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info = {
 694         .name = "zeroplus-logic-cube",
 695         .longname = "ZEROPLUS Logic Cube LAP-C series",
 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 = hw_cleanup,
 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 };