hardware/zeroplus-logic-cube/zeroplus.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2010 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 "config.h"
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <sys/time.h>
  24 #include <inttypes.h>
  25 #include <glib.h>
  26 #include <libusb.h>
  27 #include "sigrok.h"
  28 #include "sigrok-internal.h"
  29 #include "analyzer.h"
  30
  31 #define USB_VENDOR                      0x0c12
  32 #define USB_VENDOR_NAME                 "Zeroplus"
  33 #define USB_MODEL_NAME                  "Logic Cube"
  34 #define USB_MODEL_VERSION               ""
  35
  36 #define USB_INTERFACE                   0
  37 #define USB_CONFIGURATION               1
  38 #define NUM_TRIGGER_STAGES              4
  39 #define TRIGGER_TYPES                   "01"
  40
  41 #define PACKET_SIZE                     2048    /* ?? */
  42
  43 typedef struct {
  44         unsigned short pid;
  45         char model_name[64];
  46         unsigned int channels;
  47         unsigned int sample_depth;      /* In Ksamples/channel */
  48         unsigned int max_sampling_freq;
  49 } model_t;
  50
  51 /*
  52  * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
  53  * same 128K sample depth.
  54  */
  55 static model_t zeroplus_models[] = {
  56         {0x7009, "LAP-C(16064)",  16, 64,   100},
  57         {0x700A, "LAP-C(16128)",  16, 128,  200},
  58         {0x700B, "LAP-C(32128)",  32, 128,  200},
  59         {0x700C, "LAP-C(321000)", 32, 1024, 200},
  60         {0x700D, "LAP-C(322000)", 32, 2048, 200},
  61         {0x700E, "LAP-C(16032)",  16, 32,   100},
  62         {0x7016, "LAP-C(162000)", 16, 2048, 200},
  63 };
  64
  65 static int capabilities[] = {
  66         SR_HWCAP_LOGIC_ANALYZER,
  67         SR_HWCAP_SAMPLERATE,
  68         SR_HWCAP_PROBECONFIG,
  69         SR_HWCAP_CAPTURE_RATIO,
  70
  71         /* These are really implemented in the driver, not the hardware. */
  72         SR_HWCAP_LIMIT_SAMPLES,
  73         0,
  74 };
  75
  76 static const char *probe_names[] = {
  77         "0",
  78         "1",
  79         "2",
  80         "3",
  81         "4",
  82         "5",
  83         "6",
  84         "7",
  85         "8",
  86         "9",
  87         "10",
  88         "11",
  89         "12",
  90         "13",
  91         "14",
  92         "15",
  93         "16",
  94         "17",
  95         "18",
  96         "19",
  97         "20",
  98         "21",
  99         "22",
 100         "23",
 101         "24",
 102         "25",
 103         "26",
 104         "27",
 105         "28",
 106         "29",
 107         "30",
 108         "31",
 109         NULL,
 110 };
 111
 112 /* List of struct sr_device_instance, maintained by opendev()/closedev(). */
 113 static GSList *device_instances = NULL;
 114
 115 static libusb_context *usb_context = NULL;
 116
 117 /*
 118  * The hardware supports more samplerates than these, but these are the
 119  * options hardcoded into the vendor's Windows GUI.
 120  */
 121
 122 /*
 123  * TODO: We shouldn't support 150MHz and 200MHz on devices that don't go up
 124  * that high.
 125  */
 126 static uint64_t supported_samplerates[] = {
 127         SR_HZ(100),
 128         SR_HZ(500),
 129         SR_KHZ(1),
 130         SR_KHZ(5),
 131         SR_KHZ(25),
 132         SR_KHZ(50),
 133         SR_KHZ(100),
 134         SR_KHZ(200),
 135         SR_KHZ(400),
 136         SR_KHZ(800),
 137         SR_MHZ(1),
 138         SR_MHZ(10),
 139         SR_MHZ(25),
 140         SR_MHZ(50),
 141         SR_MHZ(80),
 142         SR_MHZ(100),
 143         SR_MHZ(150),
 144         SR_MHZ(200),
 145         0,
 146 };
 147
 148 static struct sr_samplerates samplerates = {
 149         SR_HZ(0),
 150         SR_HZ(0),
 151         SR_HZ(0),
 152         supported_samplerates,
 153 };
 154
 155 struct zp {
 156         uint64_t cur_samplerate;
 157         uint64_t period_ps;
 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
 167 static int hw_set_configuration(int device_index, int capability, void *value);
 168
 169 static unsigned int get_memory_size(int type)
 170 {
 171         if (type == MEMORY_SIZE_8K)
 172                 return 8 * 1024;
 173         else if (type == MEMORY_SIZE_64K)
 174                 return 64 * 1024;
 175         else if (type == MEMORY_SIZE_128K)
 176                 return 128 * 1024;
 177         else if (type == MEMORY_SIZE_512K)
 178                 return 512 * 1024;
 179         else
 180                 return 0;
 181 }
 182
 183 static int opendev4(struct sr_device_instance **sdi, libusb_device *dev,
 184                     struct libusb_device_descriptor *des)
 185 {
 186         struct zp *zp;
 187         unsigned int i;
 188         int err;
 189
 190         /* Note: sdi is non-NULL, the caller already checked this. */
 191
 192         if (!(zp = (*sdi)->priv)) {
 193                 sr_err("zp: %s: (*sdi)->priv was NULL", __func__);
 194                 return -1;
 195         }
 196
 197         if ((err = libusb_get_device_descriptor(dev, des))) {
 198                 sr_warn("failed to get device descriptor: %d", err);
 199                 return -1;
 200         }
 201
 202         if (des->idVendor != USB_VENDOR)
 203                 return 0;
 204
 205         if (libusb_get_bus_number(dev) == (*sdi)->usb->bus
 206             && libusb_get_device_address(dev) == (*sdi)->usb->address) {
 207
 208                 for (i = 0; i < ARRAY_SIZE(zeroplus_models); i++) {
 209                         if (!(des->idProduct == zeroplus_models[i].pid))
 210                                 continue;
 211
 212                         sr_info("Found PID=%04X (%s)", des->idProduct,
 213                                 zeroplus_models[i].model_name);
 214                         zp->num_channels = zeroplus_models[i].channels;
 215                         zp->memory_size = zeroplus_models[i].sample_depth * 1024;
 216                         break;
 217                 }
 218
 219                 if (zp->num_channels == 0) {
 220                         sr_warn("Unknown ZeroPlus device %04X", des->idProduct);
 221                         return -2;
 222                 }
 223
 224                 /* Found it. */
 225                 if (!(err = libusb_open(dev, &((*sdi)->usb->devhdl)))) {
 226                         (*sdi)->status = SR_ST_ACTIVE;
 227                         sr_info("opened device %d on %d.%d interface %d",
 228                                 (*sdi)->index, (*sdi)->usb->bus,
 229                                 (*sdi)->usb->address, USB_INTERFACE);
 230                 } else {
 231                         sr_warn("failed to open device: %d", err);
 232                         *sdi = NULL;
 233                 }
 234         }
 235
 236         return 0;
 237 }
 238
 239 static struct sr_device_instance *zp_open_device(int device_index)
 240 {
 241         struct sr_device_instance *sdi;
 242         libusb_device **devlist;
 243         struct libusb_device_descriptor des;
 244         int err, i;
 245
 246         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 247                 return NULL;
 248
 249         libusb_get_device_list(usb_context, &devlist);
 250         if (sdi->status == SR_ST_INACTIVE) {
 251                 /* Find the device by vendor, product, bus and address. */
 252                 libusb_get_device_list(usb_context, &devlist);
 253                 for (i = 0; devlist[i]; i++) {
 254                         /* TODO: Error handling. */
 255                         err = opendev4(&sdi, devlist[i], &des);
 256                 }
 257         } else {
 258                 /* Status must be SR_ST_ACTIVE, i.e. already in use... */
 259                 sdi = NULL;
 260         }
 261         libusb_free_device_list(devlist, 1);
 262
 263         if (sdi && sdi->status != SR_ST_ACTIVE)
 264                 sdi = NULL;
 265
 266         return sdi;
 267 }
 268
 269 static void close_device(struct sr_device_instance *sdi)
 270 {
 271         if (!sdi->usb->devhdl)
 272                 return;
 273
 274         sr_info("closing device %d on %d.%d interface %d", sdi->index,
 275                 sdi->usb->bus, sdi->usb->address, USB_INTERFACE);
 276         libusb_release_interface(sdi->usb->devhdl, USB_INTERFACE);
 277         libusb_close(sdi->usb->devhdl);
 278         sdi->usb->devhdl = NULL;
 279         sdi->status = SR_ST_INACTIVE;
 280 }
 281
 282 static int configure_probes(struct sr_device_instance *sdi, GSList *probes)
 283 {
 284         struct zp *zp;
 285         struct sr_probe *probe;
 286         GSList *l;
 287         int probe_bit, stage, i;
 288         char *tc;
 289
 290         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 291         zp = sdi->priv;
 292
 293         zp->probe_mask = 0;
 294         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 295                 zp->trigger_mask[i] = 0;
 296                 zp->trigger_value[i] = 0;
 297         }
 298
 299         stage = -1;
 300         for (l = probes; l; l = l->next) {
 301                 probe = (struct sr_probe *)l->data;
 302                 if (probe->enabled == FALSE)
 303                         continue;
 304                 probe_bit = 1 << (probe->index - 1);
 305                 zp->probe_mask |= probe_bit;
 306
 307                 if (probe->trigger) {
 308                         stage = 0;
 309                         for (tc = probe->trigger; *tc; tc++) {
 310                                 zp->trigger_mask[stage] |= probe_bit;
 311                                 if (*tc == '1')
 312                                         zp->trigger_value[stage] |= probe_bit;
 313                                 stage++;
 314                                 if (stage > NUM_TRIGGER_STAGES)
 315                                         return SR_ERR;
 316                         }
 317                 }
 318         }
 319
 320         return SR_OK;
 321 }
 322
 323 /*
 324  * API callbacks
 325  */
 326
 327 static int hw_init(const char *deviceinfo)
 328 {
 329         struct sr_device_instance *sdi;
 330         struct libusb_device_descriptor des;
 331         libusb_device **devlist;
 332         int err, devcnt, i;
 333         struct zp *zp;
 334
 335         /* Avoid compiler warnings. */
 336         (void)deviceinfo;
 337
 338         /* Allocate memory for our private driver context. */
 339         if (!(zp = g_try_malloc(sizeof(struct zp)))) {
 340                 sr_err("zp: %s: struct zp malloc failed", __func__);
 341                 return 0;
 342         }
 343
 344         /* Set some sane defaults. */
 345         zp->cur_samplerate = 0;
 346         zp->period_ps = 0;
 347         zp->limit_samples = 0;
 348         zp->num_channels = 32; /* TODO: This isn't initialized before it's needed :( */
 349         zp->memory_size = 0;
 350         zp->probe_mask = 0;
 351         memset(zp->trigger_mask, 0, NUM_TRIGGER_STAGES);
 352         memset(zp->trigger_value, 0, NUM_TRIGGER_STAGES);
 353         // memset(zp->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 354
 355         if (libusb_init(&usb_context) != 0) {
 356                 sr_warn("Failed to initialize USB.");
 357                 return 0;
 358         }
 359
 360         /* Find all ZeroPlus analyzers and add them to device list. */
 361         devcnt = 0;
 362         libusb_get_device_list(usb_context, &devlist);
 363
 364         for (i = 0; devlist[i]; i++) {
 365                 err = libusb_get_device_descriptor(devlist[i], &des);
 366                 if (err != 0) {
 367                         sr_warn("failed to get device descriptor: %d", err);
 368                         continue;
 369                 }
 370
 371                 if (des.idVendor == USB_VENDOR) {
 372                         /*
 373                          * Definitely a Zeroplus.
 374                          * TODO: Any way to detect specific model/version in
 375                          * the zeroplus range?
 376                          */
 377                         /* Register the device with libsigrok. */
 378                         sdi = sr_device_instance_new(devcnt,
 379                                         SR_ST_INACTIVE, USB_VENDOR_NAME,
 380                                         USB_MODEL_NAME, USB_MODEL_VERSION);
 381                         if (!sdi) {
 382                                 sr_err("zp: %s: sr_device_instance_new failed",
 383                                        __func__);
 384                                 return 0;
 385                         }
 386
 387                         sdi->priv = zp;
 388
 389                         device_instances =
 390                             g_slist_append(device_instances, sdi);
 391                         sdi->usb = sr_usb_device_instance_new(
 392                                 libusb_get_bus_number(devlist[i]),
 393                                 libusb_get_device_address(devlist[i]), NULL);
 394                         devcnt++;
 395                 }
 396         }
 397         libusb_free_device_list(devlist, 1);
 398
 399         return devcnt;
 400 }
 401
 402 static int hw_opendev(int device_index)
 403 {
 404         struct sr_device_instance *sdi;
 405         struct zp *zp;
 406         int err;
 407
 408         if (!(sdi = zp_open_device(device_index))) {
 409                 sr_warn("unable to open device");
 410                 return SR_ERR;
 411         }
 412
 413         /* TODO: Note: sdi is retrieved in zp_open_device(). */
 414
 415         if (!(zp = sdi->priv)) {
 416                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 417                 return SR_ERR_ARG;
 418         }
 419
 420         err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE);
 421         if (err != 0) {
 422                 sr_warn("Unable to claim interface: %d", err);
 423                 return SR_ERR;
 424         }
 425         analyzer_reset(sdi->usb->devhdl);
 426         analyzer_initialize(sdi->usb->devhdl);
 427
 428         analyzer_set_memory_size(MEMORY_SIZE_512K);
 429         // analyzer_set_freq(g_freq, g_freq_scale);
 430         analyzer_set_trigger_count(1);
 431         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 432         // * get_memory_size(g_memory_size)) / 100) >> 2);
 433         analyzer_set_ramsize_trigger_address(
 434                 (100 * get_memory_size(MEMORY_SIZE_512K) / 100) >> 2);
 435
 436 #if 0
 437         if (g_double_mode == 1)
 438                 analyzer_set_compression(COMPRESSION_DOUBLE);
 439         else if (g_compression == 1)
 440                 analyzer_set_compression(COMPRESSION_ENABLE);
 441         else
 442 #endif
 443         analyzer_set_compression(COMPRESSION_NONE);
 444
 445         if (zp->cur_samplerate == 0) {
 446                 /* Samplerate hasn't been set. Default to the slowest one. */
 447                 if (hw_set_configuration(device_index, SR_HWCAP_SAMPLERATE,
 448                      &samplerates.list[0]) == SR_ERR)
 449                         return SR_ERR;
 450         }
 451
 452         return SR_OK;
 453 }
 454
 455 static int hw_closedev(int device_index)
 456 {
 457         struct sr_device_instance *sdi;
 458
 459         if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
 460                 sr_err("zp: %s: sdi was NULL", __func__);
 461                 return SR_ERR; /* TODO: SR_ERR_ARG? */
 462         }
 463
 464         /* TODO */
 465         close_device(sdi);
 466
 467         return SR_OK;
 468 }
 469
 470 static void hw_cleanup(void)
 471 {
 472         GSList *l;
 473
 474         /* Properly close all devices... */
 475         for (l = device_instances; l; l = l->next)
 476                 close_device((struct sr_device_instance *)l->data);
 477
 478         /* ...and free all their memory. */
 479         for (l = device_instances; l; l = l->next)
 480                 g_free(l->data);
 481         g_slist_free(device_instances);
 482         device_instances = NULL;
 483
 484         if (usb_context)
 485                 libusb_exit(usb_context);
 486         usb_context = NULL;
 487 }
 488
 489 static void *hw_get_device_info(int device_index, int device_info_id)
 490 {
 491         struct sr_device_instance *sdi;
 492         struct zp *zp;
 493         void *info;
 494
 495         if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
 496                 sr_err("zp: %s: sdi was NULL", __func__);
 497                 return NULL;
 498         }
 499
 500         if (!(zp = sdi->priv)) {
 501                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 502                 return NULL;
 503         }
 504
 505         switch (device_info_id) {
 506         case SR_DI_INSTANCE:
 507                 info = sdi;
 508                 break;
 509         case SR_DI_NUM_PROBES:
 510                 info = GINT_TO_POINTER(zp->num_channels);
 511                 break;
 512         case SR_DI_PROBE_NAMES:
 513                 info = probe_names;
 514                 break;
 515         case SR_DI_SAMPLERATES:
 516                 info = &samplerates;
 517                 break;
 518         case SR_DI_TRIGGER_TYPES:
 519                 info = TRIGGER_TYPES;
 520                 break;
 521         case SR_DI_CUR_SAMPLERATE:
 522                 info = &zp->cur_samplerate;
 523                 break;
 524         default:
 525                 /* Unknown device info ID, return NULL. */
 526                 sr_err("zp: %s: Unknown device info ID", __func__);
 527                 info = NULL;
 528                 break;
 529         }
 530
 531         return info;
 532 }
 533
 534 static int hw_get_status(int device_index)
 535 {
 536         struct sr_device_instance *sdi;
 537
 538         sdi = sr_get_device_instance(device_instances, device_index);
 539         if (sdi)
 540                 return sdi->status;
 541         else
 542                 return SR_ST_NOT_FOUND;
 543 }
 544
 545 static int *hw_get_capabilities(void)
 546 {
 547         return capabilities;
 548 }
 549
 550 static int set_configuration_samplerate(struct sr_device_instance *sdi,
 551                                         uint64_t samplerate)
 552 {
 553         struct zp *zp;
 554
 555         if (!sdi) {
 556                 sr_err("zp: %s: sdi was NULL", __func__);
 557                 return SR_ERR_ARG;
 558         }
 559
 560         if (!(zp = sdi->priv)) {
 561                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 562                 return SR_ERR_ARG;
 563         }
 564
 565         sr_info("zp: Setting samplerate to %" PRIu64 "Hz.", samplerate);
 566
 567         if (samplerate > SR_MHZ(1))
 568                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 569         else if (samplerate > SR_KHZ(1))
 570                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 571         else
 572                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 573
 574         zp->cur_samplerate = samplerate;
 575         zp->period_ps = 1000000000000 / samplerate;
 576
 577         return SR_OK;
 578 }
 579
 580 static int hw_set_configuration(int device_index, int capability, void *value)
 581 {
 582         struct sr_device_instance *sdi;
 583         uint64_t *tmp_u64;
 584         struct zp *zp;
 585
 586         if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
 587                 sr_err("zp: %s: sdi was NULL", __func__);
 588                 return SR_ERR;
 589         }
 590
 591         if (!(zp = sdi->priv)) {
 592                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 593                 return SR_ERR_ARG;
 594         }
 595
 596         switch (capability) {
 597         case SR_HWCAP_SAMPLERATE:
 598                 tmp_u64 = value;
 599                 return set_configuration_samplerate(sdi, *tmp_u64);
 600         case SR_HWCAP_PROBECONFIG:
 601                 return configure_probes(sdi, (GSList *)value);
 602         case SR_HWCAP_LIMIT_SAMPLES:
 603                 tmp_u64 = value;
 604                 zp->limit_samples = *tmp_u64;
 605                 return SR_OK;
 606         default:
 607                 return SR_ERR;
 608         }
 609 }
 610
 611 static int hw_start_acquisition(int device_index, gpointer session_data)
 612 {
 613         struct sr_device_instance *sdi;
 614         struct sr_datafeed_packet packet;
 615         struct sr_datafeed_logic logic;
 616         struct sr_datafeed_header header;
 617         uint64_t samples_read;
 618         int res;
 619         unsigned int packet_num;
 620         unsigned char *buf;
 621         struct zp *zp;
 622
 623         if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
 624                 sr_err("zp: %s: sdi was NULL", __func__);
 625                 return SR_ERR;
 626         }
 627
 628         if (!(zp = sdi->priv)) {
 629                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 630                 return SR_ERR_ARG;
 631         }
 632
 633         /* push configured settings to device */
 634         analyzer_configure(sdi->usb->devhdl);
 635
 636         analyzer_start(sdi->usb->devhdl);
 637         sr_info("Waiting for data");
 638         analyzer_wait_data(sdi->usb->devhdl);
 639
 640         sr_info("Stop address    = 0x%x", analyzer_get_stop_address(sdi->usb->devhdl));
 641         sr_info("Now address     = 0x%x", analyzer_get_now_address(sdi->usb->devhdl));
 642         sr_info("Trigger address = 0x%x", analyzer_get_trigger_address(sdi->usb->devhdl));
 643
 644         packet.type = SR_DF_HEADER;
 645         packet.payload = &header;
 646         header.feed_version = 1;
 647         gettimeofday(&header.starttime, NULL);
 648         header.samplerate = zp->cur_samplerate;
 649         header.num_logic_probes = zp->num_channels;
 650         header.num_analog_probes = 0;
 651         sr_session_bus(session_data, &packet);
 652
 653         if (!(buf = g_try_malloc(PACKET_SIZE))) {
 654                 sr_err("zp: %s: buf malloc failed", __func__);
 655                 return SR_ERR_MALLOC;
 656         }
 657
 658         samples_read = 0;
 659         analyzer_read_start(sdi->usb->devhdl);
 660         /* Send the incoming transfer to the session bus. */
 661         for (packet_num = 0; packet_num < (zp->memory_size * 4 / PACKET_SIZE);
 662              packet_num++) {
 663                 res = analyzer_read_data(sdi->usb->devhdl, buf, PACKET_SIZE);
 664                 sr_info("Tried to read %llx bytes, actually read %x bytes",
 665                         PACKET_SIZE, res);
 666
 667                 packet.type = SR_DF_LOGIC;
 668                 packet.timeoffset = samples_read * zp->period_ps;
 669                 packet.duration = res / 4 * zp->period_ps;
 670                 packet.payload = &logic;
 671                 logic.length = PACKET_SIZE;
 672                 logic.unitsize = 4;
 673                 logic.data = buf;
 674                 sr_session_bus(session_data, &packet);
 675                 samples_read += res / 4;
 676         }
 677         analyzer_read_stop(sdi->usb->devhdl);
 678         g_free(buf);
 679
 680         packet.type = SR_DF_END;
 681         sr_session_bus(session_data, &packet);
 682
 683         return SR_OK;
 684 }
 685
 686 /* This stops acquisition on ALL devices, ignoring device_index. */
 687 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 688 {
 689         struct sr_datafeed_packet packet;
 690         struct sr_device_instance *sdi;
 691
 692         packet.type = SR_DF_END;
 693         sr_session_bus(session_device_id, &packet);
 694
 695         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 696                 return; /* TODO: Cry? */
 697
 698         analyzer_reset(sdi->usb->devhdl);
 699         /* TODO: Need to cancel and free any queued up transfers. */
 700 }
 701
 702 struct sr_device_plugin zeroplus_logic_cube_plugin_info = {
 703         .name = "zeroplus-logic-cube",
 704         .longname = "Zeroplus Logic Cube LAP-C series",
 705         .api_version = 1,
 706         .init = hw_init,
 707         .cleanup = hw_cleanup,
 708         .opendev = hw_opendev,
 709         .closedev = hw_closedev,
 710         .get_device_info = hw_get_device_info,
 711         .get_status = hw_get_status,
 712         .get_capabilities = hw_get_capabilities,
 713         .set_configuration = hw_set_configuration,
 714         .start_acquisition = hw_start_acquisition,
 715         .stop_acquisition = hw_stop_acquisition,
 716 };