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 <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 "sigrok.h"
  29 #include "sigrok-internal.h"
  30 #include "analyzer.h"
  31
  32 #define USB_VENDOR                      0x0c12
  33 #define USB_VENDOR_NAME                 "Zeroplus"
  34 #define USB_MODEL_NAME                  "Logic Cube"
  35 #define USB_MODEL_VERSION               ""
  36
  37 #define USB_INTERFACE                   0
  38 #define USB_CONFIGURATION               1
  39 #define NUM_TRIGGER_STAGES              4
  40 #define TRIGGER_TYPES                   "01"
  41
  42 #define PACKET_SIZE                     2048    /* ?? */
  43
  44 typedef struct {
  45         unsigned short pid;
  46         char model_name[64];
  47         unsigned int channels;
  48         unsigned int sample_depth;      /* In Ksamples/channel */
  49         unsigned int max_sampling_freq;
  50 } model_t;
  51
  52 /*
  53  * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
  54  * same 128K sample depth.
  55  */
  56 static model_t zeroplus_models[] = {
  57         {0x7009, "LAP-C(16064)",  16, 64,   100},
  58         {0x700A, "LAP-C(16128)",  16, 128,  200},
  59         {0x700B, "LAP-C(32128)",  32, 128,  200},
  60         {0x700C, "LAP-C(321000)", 32, 1024, 200},
  61         {0x700D, "LAP-C(322000)", 32, 2048, 200},
  62         {0x700E, "LAP-C(16032)",  16, 32,   100},
  63         {0x7016, "LAP-C(162000)", 16, 2048, 200},
  64 };
  65
  66 static int capabilities[] = {
  67         SR_HWCAP_LOGIC_ANALYZER,
  68         SR_HWCAP_SAMPLERATE,
  69         SR_HWCAP_PROBECONFIG,
  70         SR_HWCAP_CAPTURE_RATIO,
  71
  72         /* These are really implemented in the driver, not the hardware. */
  73         SR_HWCAP_LIMIT_SAMPLES,
  74         0,
  75 };
  76
  77 static const char *probe_names[] = {
  78         "0",
  79         "1",
  80         "2",
  81         "3",
  82         "4",
  83         "5",
  84         "6",
  85         "7",
  86         "8",
  87         "9",
  88         "10",
  89         "11",
  90         "12",
  91         "13",
  92         "14",
  93         "15",
  94         "16",
  95         "17",
  96         "18",
  97         "19",
  98         "20",
  99         "21",
 100         "22",
 101         "23",
 102         "24",
 103         "25",
 104         "26",
 105         "27",
 106         "28",
 107         "29",
 108         "30",
 109         "31",
 110         NULL,
 111 };
 112
 113 /* List of struct sr_device_instance, maintained by opendev()/closedev(). */
 114 static GSList *device_instances = NULL;
 115
 116 static libusb_context *usb_context = NULL;
 117
 118 /*
 119  * The hardware supports more samplerates than these, but these are the
 120  * options hardcoded into the vendor's Windows GUI.
 121  */
 122
 123 /*
 124  * TODO: We shouldn't support 150MHz and 200MHz on devices that don't go up
 125  * that high.
 126  */
 127 static uint64_t supported_samplerates[] = {
 128         SR_HZ(100),
 129         SR_HZ(500),
 130         SR_KHZ(1),
 131         SR_KHZ(5),
 132         SR_KHZ(25),
 133         SR_KHZ(50),
 134         SR_KHZ(100),
 135         SR_KHZ(200),
 136         SR_KHZ(400),
 137         SR_KHZ(800),
 138         SR_MHZ(1),
 139         SR_MHZ(10),
 140         SR_MHZ(25),
 141         SR_MHZ(50),
 142         SR_MHZ(80),
 143         SR_MHZ(100),
 144         SR_MHZ(150),
 145         SR_MHZ(200),
 146         0,
 147 };
 148
 149 static struct sr_samplerates samplerates = {
 150         SR_HZ(0),
 151         SR_HZ(0),
 152         SR_HZ(0),
 153         supported_samplerates,
 154 };
 155
 156 struct zp {
 157         uint64_t cur_samplerate;
 158         uint64_t period_ps;
 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
 168 static int hw_set_configuration(int device_index, int capability, void *value);
 169
 170 static unsigned int get_memory_size(int type)
 171 {
 172         if (type == MEMORY_SIZE_8K)
 173                 return 8 * 1024;
 174         else if (type == MEMORY_SIZE_64K)
 175                 return 64 * 1024;
 176         else if (type == MEMORY_SIZE_128K)
 177                 return 128 * 1024;
 178         else if (type == MEMORY_SIZE_512K)
 179                 return 512 * 1024;
 180         else
 181                 return 0;
 182 }
 183
 184 static int opendev4(struct sr_device_instance **sdi, libusb_device *dev,
 185                     struct libusb_device_descriptor *des)
 186 {
 187         struct zp *zp;
 188         unsigned int i;
 189         int err;
 190
 191         /* Note: sdi is non-NULL, the caller already checked this. */
 192
 193         if (!(zp = (*sdi)->priv)) {
 194                 sr_err("zp: %s: (*sdi)->priv was NULL", __func__);
 195                 return -1;
 196         }
 197
 198         if ((err = libusb_get_device_descriptor(dev, des))) {
 199                 sr_warn("failed to get device descriptor: %d", err);
 200                 return -1;
 201         }
 202
 203         if (des->idVendor != USB_VENDOR)
 204                 return 0;
 205
 206         if (libusb_get_bus_number(dev) == (*sdi)->usb->bus
 207             && libusb_get_device_address(dev) == (*sdi)->usb->address) {
 208
 209                 for (i = 0; i < ARRAY_SIZE(zeroplus_models); i++) {
 210                         if (!(des->idProduct == zeroplus_models[i].pid))
 211                                 continue;
 212
 213                         sr_info("Found PID=%04X (%s)", des->idProduct,
 214                                 zeroplus_models[i].model_name);
 215                         zp->num_channels = zeroplus_models[i].channels;
 216                         zp->memory_size = zeroplus_models[i].sample_depth * 1024;
 217                         break;
 218                 }
 219
 220                 if (zp->num_channels == 0) {
 221                         sr_warn("Unknown ZeroPlus device %04X", des->idProduct);
 222                         return -2;
 223                 }
 224
 225                 /* Found it. */
 226                 if (!(err = libusb_open(dev, &((*sdi)->usb->devhdl)))) {
 227                         (*sdi)->status = SR_ST_ACTIVE;
 228                         sr_info("opened device %d on %d.%d interface %d",
 229                                 (*sdi)->index, (*sdi)->usb->bus,
 230                                 (*sdi)->usb->address, USB_INTERFACE);
 231                 } else {
 232                         sr_warn("failed to open device: %d", err);
 233                         *sdi = NULL;
 234                 }
 235         }
 236
 237         return 0;
 238 }
 239
 240 static struct sr_device_instance *zp_open_device(int device_index)
 241 {
 242         struct sr_device_instance *sdi;
 243         libusb_device **devlist;
 244         struct libusb_device_descriptor des;
 245         int err, i;
 246
 247         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 248                 return NULL;
 249
 250         libusb_get_device_list(usb_context, &devlist);
 251         if (sdi->status == SR_ST_INACTIVE) {
 252                 /* Find the device by vendor, product, bus and address. */
 253                 libusb_get_device_list(usb_context, &devlist);
 254                 for (i = 0; devlist[i]; i++) {
 255                         /* TODO: Error handling. */
 256                         err = opendev4(&sdi, devlist[i], &des);
 257                 }
 258         } else {
 259                 /* Status must be SR_ST_ACTIVE, i.e. already in use... */
 260                 sdi = NULL;
 261         }
 262         libusb_free_device_list(devlist, 1);
 263
 264         if (sdi && sdi->status != SR_ST_ACTIVE)
 265                 sdi = NULL;
 266
 267         return sdi;
 268 }
 269
 270 static void close_device(struct sr_device_instance *sdi)
 271 {
 272         if (!sdi->usb->devhdl)
 273                 return;
 274
 275         sr_info("closing device %d on %d.%d interface %d", sdi->index,
 276                 sdi->usb->bus, sdi->usb->address, USB_INTERFACE);
 277         libusb_release_interface(sdi->usb->devhdl, USB_INTERFACE);
 278         libusb_close(sdi->usb->devhdl);
 279         sdi->usb->devhdl = NULL;
 280         sdi->status = SR_ST_INACTIVE;
 281 }
 282
 283 static int configure_probes(struct sr_device_instance *sdi, GSList *probes)
 284 {
 285         struct zp *zp;
 286         struct sr_probe *probe;
 287         GSList *l;
 288         int probe_bit, stage, i;
 289         char *tc;
 290
 291         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 292         zp = sdi->priv;
 293
 294         zp->probe_mask = 0;
 295         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 296                 zp->trigger_mask[i] = 0;
 297                 zp->trigger_value[i] = 0;
 298         }
 299
 300         stage = -1;
 301         for (l = probes; l; l = l->next) {
 302                 probe = (struct sr_probe *)l->data;
 303                 if (probe->enabled == FALSE)
 304                         continue;
 305                 probe_bit = 1 << (probe->index - 1);
 306                 zp->probe_mask |= probe_bit;
 307
 308                 if (probe->trigger) {
 309                         stage = 0;
 310                         for (tc = probe->trigger; *tc; tc++) {
 311                                 zp->trigger_mask[stage] |= probe_bit;
 312                                 if (*tc == '1')
 313                                         zp->trigger_value[stage] |= probe_bit;
 314                                 stage++;
 315                                 if (stage > NUM_TRIGGER_STAGES)
 316                                         return SR_ERR;
 317                         }
 318                 }
 319         }
 320
 321         return SR_OK;
 322 }
 323
 324 /*
 325  * API callbacks
 326  */
 327
 328 static int hw_init(const char *deviceinfo)
 329 {
 330         struct sr_device_instance *sdi;
 331         struct libusb_device_descriptor des;
 332         libusb_device **devlist;
 333         int err, devcnt, i;
 334         struct zp *zp;
 335
 336         /* Avoid compiler warnings. */
 337         (void)deviceinfo;
 338
 339         /* Allocate memory for our private driver context. */
 340         if (!(zp = g_try_malloc(sizeof(struct zp)))) {
 341                 sr_err("zp: %s: struct zp malloc failed", __func__);
 342                 return 0;
 343         }
 344
 345         /* Set some sane defaults. */
 346         zp->cur_samplerate = 0;
 347         zp->period_ps = 0;
 348         zp->limit_samples = 0;
 349         zp->num_channels = 32; /* TODO: This isn't initialized before it's needed :( */
 350         zp->memory_size = 0;
 351         zp->probe_mask = 0;
 352         memset(zp->trigger_mask, 0, NUM_TRIGGER_STAGES);
 353         memset(zp->trigger_value, 0, NUM_TRIGGER_STAGES);
 354         // memset(zp->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 355
 356         if (libusb_init(&usb_context) != 0) {
 357                 sr_warn("Failed to initialize USB.");
 358                 return 0;
 359         }
 360
 361         /* Find all ZeroPlus analyzers and add them to device list. */
 362         devcnt = 0;
 363         libusb_get_device_list(usb_context, &devlist);
 364
 365         for (i = 0; devlist[i]; i++) {
 366                 err = libusb_get_device_descriptor(devlist[i], &des);
 367                 if (err != 0) {
 368                         sr_warn("failed to get device descriptor: %d", err);
 369                         continue;
 370                 }
 371
 372                 if (des.idVendor == USB_VENDOR) {
 373                         /*
 374                          * Definitely a Zeroplus.
 375                          * TODO: Any way to detect specific model/version in
 376                          * the zeroplus range?
 377                          */
 378                         /* Register the device with libsigrok. */
 379                         sdi = sr_device_instance_new(devcnt,
 380                                         SR_ST_INACTIVE, USB_VENDOR_NAME,
 381                                         USB_MODEL_NAME, USB_MODEL_VERSION);
 382                         if (!sdi) {
 383                                 sr_err("zp: %s: sr_device_instance_new failed",
 384                                        __func__);
 385                                 return 0;
 386                         }
 387
 388                         sdi->priv = zp;
 389
 390                         device_instances =
 391                             g_slist_append(device_instances, sdi);
 392                         sdi->usb = sr_usb_device_instance_new(
 393                                 libusb_get_bus_number(devlist[i]),
 394                                 libusb_get_device_address(devlist[i]), NULL);
 395                         devcnt++;
 396                 }
 397         }
 398         libusb_free_device_list(devlist, 1);
 399
 400         return devcnt;
 401 }
 402
 403 static int hw_opendev(int device_index)
 404 {
 405         struct sr_device_instance *sdi;
 406         struct zp *zp;
 407         int err;
 408
 409         if (!(sdi = zp_open_device(device_index))) {
 410                 sr_warn("unable to open device");
 411                 return SR_ERR;
 412         }
 413
 414         /* TODO: Note: sdi is retrieved in zp_open_device(). */
 415
 416         if (!(zp = sdi->priv)) {
 417                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 418                 return SR_ERR_ARG;
 419         }
 420
 421         err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE);
 422         if (err != 0) {
 423                 sr_warn("Unable to claim interface: %d", err);
 424                 return SR_ERR;
 425         }
 426         analyzer_reset(sdi->usb->devhdl);
 427         analyzer_initialize(sdi->usb->devhdl);
 428
 429         analyzer_set_memory_size(MEMORY_SIZE_512K);
 430         // analyzer_set_freq(g_freq, g_freq_scale);
 431         analyzer_set_trigger_count(1);
 432         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 433         // * get_memory_size(g_memory_size)) / 100) >> 2);
 434         analyzer_set_ramsize_trigger_address(
 435                 (100 * get_memory_size(MEMORY_SIZE_512K) / 100) >> 2);
 436
 437 #if 0
 438         if (g_double_mode == 1)
 439                 analyzer_set_compression(COMPRESSION_DOUBLE);
 440         else if (g_compression == 1)
 441                 analyzer_set_compression(COMPRESSION_ENABLE);
 442         else
 443 #endif
 444         analyzer_set_compression(COMPRESSION_NONE);
 445
 446         if (zp->cur_samplerate == 0) {
 447                 /* Samplerate hasn't been set. Default to the slowest one. */
 448                 if (hw_set_configuration(device_index, SR_HWCAP_SAMPLERATE,
 449                      &samplerates.list[0]) == SR_ERR)
 450                         return SR_ERR;
 451         }
 452
 453         return SR_OK;
 454 }
 455
 456 static int hw_closedev(int device_index)
 457 {
 458         struct sr_device_instance *sdi;
 459
 460         if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
 461                 sr_err("zp: %s: sdi was NULL", __func__);
 462                 return SR_ERR; /* TODO: SR_ERR_ARG? */
 463         }
 464
 465         /* TODO */
 466         close_device(sdi);
 467
 468         return SR_OK;
 469 }
 470
 471 static void hw_cleanup(void)
 472 {
 473         GSList *l;
 474
 475         /* Properly close all devices... */
 476         for (l = device_instances; l; l = l->next)
 477                 close_device((struct sr_device_instance *)l->data);
 478
 479         /* ...and free all their memory. */
 480         for (l = device_instances; l; l = l->next)
 481                 g_free(l->data);
 482         g_slist_free(device_instances);
 483         device_instances = NULL;
 484
 485         if (usb_context)
 486                 libusb_exit(usb_context);
 487         usb_context = NULL;
 488 }
 489
 490 static void *hw_get_device_info(int device_index, int device_info_id)
 491 {
 492         struct sr_device_instance *sdi;
 493         struct zp *zp;
 494         void *info;
 495
 496         if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
 497                 sr_err("zp: %s: sdi was NULL", __func__);
 498                 return NULL;
 499         }
 500
 501         if (!(zp = sdi->priv)) {
 502                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 503                 return NULL;
 504         }
 505
 506         switch (device_info_id) {
 507         case SR_DI_INSTANCE:
 508                 info = sdi;
 509                 break;
 510         case SR_DI_NUM_PROBES:
 511                 info = GINT_TO_POINTER(zp->num_channels);
 512                 break;
 513         case SR_DI_PROBE_NAMES:
 514                 info = probe_names;
 515                 break;
 516         case SR_DI_SAMPLERATES:
 517                 info = &samplerates;
 518                 break;
 519         case SR_DI_TRIGGER_TYPES:
 520                 info = TRIGGER_TYPES;
 521                 break;
 522         case SR_DI_CUR_SAMPLERATE:
 523                 info = &zp->cur_samplerate;
 524                 break;
 525         default:
 526                 /* Unknown device info ID, return NULL. */
 527                 sr_err("zp: %s: Unknown device info ID", __func__);
 528                 info = NULL;
 529                 break;
 530         }
 531
 532         return info;
 533 }
 534
 535 static int hw_get_status(int device_index)
 536 {
 537         struct sr_device_instance *sdi;
 538
 539         sdi = sr_get_device_instance(device_instances, device_index);
 540         if (sdi)
 541                 return sdi->status;
 542         else
 543                 return SR_ST_NOT_FOUND;
 544 }
 545
 546 static int *hw_get_capabilities(void)
 547 {
 548         return capabilities;
 549 }
 550
 551 static int set_configuration_samplerate(struct sr_device_instance *sdi,
 552                                         uint64_t samplerate)
 553 {
 554         struct zp *zp;
 555
 556         if (!sdi) {
 557                 sr_err("zp: %s: sdi was NULL", __func__);
 558                 return SR_ERR_ARG;
 559         }
 560
 561         if (!(zp = sdi->priv)) {
 562                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 563                 return SR_ERR_ARG;
 564         }
 565
 566         sr_info("zp: Setting samplerate to %" PRIu64 "Hz.", samplerate);
 567
 568         if (samplerate > SR_MHZ(1))
 569                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 570         else if (samplerate > SR_KHZ(1))
 571                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 572         else
 573                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 574
 575         zp->cur_samplerate = samplerate;
 576         zp->period_ps = 1000000000000 / samplerate;
 577
 578         return SR_OK;
 579 }
 580
 581 static int hw_set_configuration(int device_index, int capability, void *value)
 582 {
 583         struct sr_device_instance *sdi;
 584         uint64_t *tmp_u64;
 585         struct zp *zp;
 586
 587         if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
 588                 sr_err("zp: %s: sdi was NULL", __func__);
 589                 return SR_ERR;
 590         }
 591
 592         if (!(zp = sdi->priv)) {
 593                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 594                 return SR_ERR_ARG;
 595         }
 596
 597         switch (capability) {
 598         case SR_HWCAP_SAMPLERATE:
 599                 tmp_u64 = value;
 600                 return set_configuration_samplerate(sdi, *tmp_u64);
 601         case SR_HWCAP_PROBECONFIG:
 602                 return configure_probes(sdi, (GSList *)value);
 603         case SR_HWCAP_LIMIT_SAMPLES:
 604                 tmp_u64 = value;
 605                 zp->limit_samples = *tmp_u64;
 606                 return SR_OK;
 607         default:
 608                 return SR_ERR;
 609         }
 610 }
 611
 612 static int hw_start_acquisition(int device_index, gpointer session_data)
 613 {
 614         struct sr_device_instance *sdi;
 615         struct sr_datafeed_packet packet;
 616         struct sr_datafeed_logic logic;
 617         struct sr_datafeed_header header;
 618         uint64_t samples_read;
 619         int res;
 620         unsigned int packet_num;
 621         unsigned char *buf;
 622         struct zp *zp;
 623
 624         if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
 625                 sr_err("zp: %s: sdi was NULL", __func__);
 626                 return SR_ERR;
 627         }
 628
 629         if (!(zp = sdi->priv)) {
 630                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 631                 return SR_ERR_ARG;
 632         }
 633
 634         /* push configured settings to device */
 635         analyzer_configure(sdi->usb->devhdl);
 636
 637         analyzer_start(sdi->usb->devhdl);
 638         sr_info("Waiting for data");
 639         analyzer_wait_data(sdi->usb->devhdl);
 640
 641         sr_info("Stop address    = 0x%x", analyzer_get_stop_address(sdi->usb->devhdl));
 642         sr_info("Now address     = 0x%x", analyzer_get_now_address(sdi->usb->devhdl));
 643         sr_info("Trigger address = 0x%x", analyzer_get_trigger_address(sdi->usb->devhdl));
 644
 645         packet.type = SR_DF_HEADER;
 646         packet.payload = &header;
 647         header.feed_version = 1;
 648         gettimeofday(&header.starttime, NULL);
 649         header.samplerate = zp->cur_samplerate;
 650         header.num_logic_probes = zp->num_channels;
 651         header.num_analog_probes = 0;
 652         sr_session_bus(session_data, &packet);
 653
 654         if (!(buf = g_try_malloc(PACKET_SIZE))) {
 655                 sr_err("zp: %s: buf malloc failed", __func__);
 656                 return SR_ERR_MALLOC;
 657         }
 658
 659         samples_read = 0;
 660         analyzer_read_start(sdi->usb->devhdl);
 661         /* Send the incoming transfer to the session bus. */
 662         for (packet_num = 0; packet_num < (zp->memory_size * 4 / PACKET_SIZE);
 663              packet_num++) {
 664                 res = analyzer_read_data(sdi->usb->devhdl, buf, PACKET_SIZE);
 665                 sr_info("Tried to read %llx bytes, actually read %x bytes",
 666                         PACKET_SIZE, res);
 667
 668                 packet.type = SR_DF_LOGIC;
 669                 packet.timeoffset = samples_read * zp->period_ps;
 670                 packet.duration = res / 4 * zp->period_ps;
 671                 packet.payload = &logic;
 672                 logic.length = PACKET_SIZE;
 673                 logic.unitsize = 4;
 674                 logic.data = buf;
 675                 sr_session_bus(session_data, &packet);
 676                 samples_read += res / 4;
 677         }
 678         analyzer_read_stop(sdi->usb->devhdl);
 679         g_free(buf);
 680
 681         packet.type = SR_DF_END;
 682         sr_session_bus(session_data, &packet);
 683
 684         return SR_OK;
 685 }
 686
 687 /* This stops acquisition on ALL devices, ignoring device_index. */
 688 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 689 {
 690         struct sr_datafeed_packet packet;
 691         struct sr_device_instance *sdi;
 692
 693         packet.type = SR_DF_END;
 694         sr_session_bus(session_device_id, &packet);
 695
 696         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 697                 return; /* TODO: Cry? */
 698
 699         analyzer_reset(sdi->usb->devhdl);
 700         /* TODO: Need to cancel and free any queued up transfers. */
 701 }
 702
 703 struct sr_device_plugin zeroplus_logic_cube_plugin_info = {
 704         .name = "zeroplus-logic-cube",
 705         .longname = "Zeroplus Logic Cube LAP-C series",
 706         .api_version = 1,
 707         .init = hw_init,
 708         .cleanup = hw_cleanup,
 709         .opendev = hw_opendev,
 710         .closedev = hw_closedev,
 711         .get_device_info = hw_get_device_info,
 712         .get_status = hw_get_status,
 713         .get_capabilities = hw_get_capabilities,
 714         .set_configuration = hw_set_configuration,
 715         .start_acquisition = hw_start_acquisition,
 716         .stop_acquisition = hw_stop_acquisition,
 717 };