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 "libsigrok.h"
  28 #include "libsigrok-internal.h"
  29 #include "analyzer.h"
  30
  31 #define USB_VENDOR                      0x0c12
  32
  33 #define VENDOR_NAME                     "ZEROPLUS"
  34 #define MODEL_NAME                      "Logic Cube LAP-C"
  35 #define MODEL_VERSION                   NULL
  36
  37 #define NUM_PROBES                      16
  38 #define USB_INTERFACE                   0
  39 #define USB_CONFIGURATION               1
  40 #define NUM_TRIGGER_STAGES              4
  41 #define TRIGGER_TYPES                   "01"
  42
  43 #define PACKET_SIZE                     2048    /* ?? */
  44
  45 //#define ZP_EXPERIMENTAL
  46
  47 typedef struct {
  48         unsigned short vid;
  49         unsigned short pid;
  50         char *model_name;
  51         unsigned int channels;
  52         unsigned int sample_depth;      /* In Ksamples/channel */
  53         unsigned int max_sampling_freq;
  54 } model_t;
  55
  56 /*
  57  * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
  58  * same 128K sample depth.
  59  */
  60 static model_t zeroplus_models[] = {
  61         {0x0c12, 0x7009, "LAP-C(16064)",  16, 64,   100},
  62         {0x0c12, 0x700A, "LAP-C(16128)",  16, 128,  200},
  63         /* TODO: we don't know anything about these
  64         {0x0c12, 0x700B, "LAP-C(32128)",  32, 128,  200},
  65         {0x0c12, 0x700C, "LAP-C(321000)", 32, 1024, 200},
  66         {0x0c12, 0x700D, "LAP-C(322000)", 32, 2048, 200},
  67         */
  68         {0x0c12, 0x700E, "LAP-C(16032)",  16, 32,   100},
  69         {0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
  70         { 0, 0, 0, 0, 0, 0 }
  71 };
  72
  73 static const int hwcaps[] = {
  74         SR_HWCAP_LOGIC_ANALYZER,
  75         SR_HWCAP_SAMPLERATE,
  76         SR_HWCAP_CAPTURE_RATIO,
  77
  78         /* These are really implemented in the driver, not the hardware. */
  79         SR_HWCAP_LIMIT_SAMPLES,
  80         0,
  81 };
  82
  83 /*
  84  * ZEROPLUS LAP-C (16032) numbers the 16 probes A0-A7 and B0-B7.
  85  * We currently ignore other untested/unsupported devices here.
  86  */
  87 static const char *probe_names[NUM_PROBES + 1] = {
  88         "A0",
  89         "A1",
  90         "A2",
  91         "A3",
  92         "A4",
  93         "A5",
  94         "A6",
  95         "A7",
  96         "B0",
  97         "B1",
  98         "B2",
  99         "B3",
 100         "B4",
 101         "B5",
 102         "B6",
 103         "B7",
 104         NULL,
 105 };
 106
 107 /* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */
 108 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
 109 static struct sr_dev_driver *zdi = &zeroplus_logic_cube_driver_info;
 110
 111 /*
 112  * The hardware supports more samplerates than these, but these are the
 113  * options hardcoded into the vendor's Windows GUI.
 114  */
 115
 116 /*
 117  * TODO: We shouldn't support 150MHz and 200MHz on devices that don't go up
 118  * that high.
 119  */
 120 static const uint64_t supported_samplerates[] = {
 121         SR_HZ(100),
 122         SR_HZ(500),
 123         SR_KHZ(1),
 124         SR_KHZ(5),
 125         SR_KHZ(25),
 126         SR_KHZ(50),
 127         SR_KHZ(100),
 128         SR_KHZ(200),
 129         SR_KHZ(400),
 130         SR_KHZ(800),
 131         SR_MHZ(1),
 132         SR_MHZ(10),
 133         SR_MHZ(25),
 134         SR_MHZ(50),
 135         SR_MHZ(80),
 136         SR_MHZ(100),
 137         SR_MHZ(150),
 138         SR_MHZ(200),
 139         0,
 140 };
 141
 142 static const struct sr_samplerates samplerates = {
 143         0,
 144         0,
 145         0,
 146         supported_samplerates,
 147 };
 148
 149 /* Private, per-device-instance driver context. */
 150 struct dev_context {
 151         uint64_t cur_samplerate;
 152         uint64_t max_samplerate;
 153         uint64_t limit_samples;
 154         int num_channels; /* TODO: This isn't initialized before it's needed :( */
 155         int memory_size;
 156         unsigned int max_memory_size;
 157         //uint8_t probe_mask;
 158         //uint8_t trigger_mask[NUM_TRIGGER_STAGES];
 159         //uint8_t trigger_value[NUM_TRIGGER_STAGES];
 160         // uint8_t trigger_buffer[NUM_TRIGGER_STAGES];
 161         int trigger;
 162         unsigned int capture_ratio;
 163
 164         /* TODO: this belongs in the device instance */
 165         struct sr_usb_dev_inst *usb;
 166 };
 167
 168 static int hw_dev_close(struct sr_dev_inst *sdi);
 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 #if 0
 185 static int configure_probes(const struct sr_dev_inst *sdi)
 186 {
 187         struct dev_context *devc;
 188         const struct sr_probe *probe;
 189         const GSList *l;
 190         int probe_bit, stage, i;
 191         char *tc;
 192
 193         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 194         devc = sdi->priv;
 195
 196         devc->probe_mask = 0;
 197         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 198                 devc->trigger_mask[i] = 0;
 199                 devc->trigger_value[i] = 0;
 200         }
 201
 202         stage = -1;
 203         for (l = sdi->probes; l; l = l->next) {
 204                 probe = (struct sr_probe *)l->data;
 205                 if (probe->enabled == FALSE)
 206                         continue;
 207                 probe_bit = 1 << (probe->index);
 208                 devc->probe_mask |= probe_bit;
 209
 210                 if (probe->trigger) {
 211                         stage = 0;
 212                         for (tc = probe->trigger; *tc; tc++) {
 213                                 devc->trigger_mask[stage] |= probe_bit;
 214                                 if (*tc == '1')
 215                                         devc->trigger_value[stage] |= probe_bit;
 216                                 stage++;
 217                                 if (stage > NUM_TRIGGER_STAGES)
 218                                         return SR_ERR;
 219                         }
 220                 }
 221         }
 222
 223         return SR_OK;
 224 }
 225 #endif
 226
 227 static int configure_probes(const struct sr_dev_inst *sdi)
 228 {
 229         struct dev_context *devc;
 230         const GSList *l;
 231         const struct sr_probe *probe;
 232         char *tc;
 233         int type;
 234
 235         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 236         devc = sdi->priv;
 237
 238         for (l = sdi->probes; l; l = l->next) {
 239                 probe = (struct sr_probe *)l->data;
 240                 if (probe->enabled == FALSE)
 241                         continue;
 242
 243                 if ((tc = probe->trigger)) {
 244                         switch (*tc) {
 245                         case '1':
 246                                 type = TRIGGER_HIGH;
 247                                 break;
 248                         case '0':
 249                                 type = TRIGGER_LOW;
 250                                 break;
 251 #if 0
 252                         case 'r':
 253                                 type = TRIGGER_POSEDGE;
 254                                 break;
 255                         case 'f':
 256                                 type = TRIGGER_NEGEDGE;
 257                                 break;
 258                         case 'c':
 259                                 type = TRIGGER_ANYEDGE;
 260                                 break;
 261 #endif
 262                         default:
 263                                 return SR_ERR;
 264                         }
 265                         analyzer_add_trigger(probe->index, type);
 266                         devc->trigger = 1;
 267                 }
 268         }
 269
 270         return SR_OK;
 271 }
 272
 273 static int clear_instances(void)
 274 {
 275         GSList *l;
 276         struct sr_dev_inst *sdi;
 277         struct drv_context *drvc;
 278         struct dev_context *devc;
 279
 280         drvc = zdi->priv;
 281         for (l = drvc->instances; l; l = l->next) {
 282                 sdi = l->data;
 283                 if (!(devc = sdi->priv)) {
 284                         /* Log error, but continue cleaning up the rest. */
 285                         sr_err("zeroplus: %s: sdi->priv was NULL, continuing", __func__);
 286                         continue;
 287                 }
 288                 sr_usb_dev_inst_free(devc->usb);
 289                 /* Properly close all devices... */
 290                 hw_dev_close(sdi);
 291                 /* ...and free all their memory. */
 292                 sr_dev_inst_free(sdi);
 293         }
 294         g_slist_free(drvc->instances);
 295         drvc->instances = NULL;
 296
 297         return SR_OK;
 298 }
 299
 300 /*
 301  * API callbacks
 302  */
 303
 304 static int hw_init(struct sr_context *sr_ctx)
 305 {
 306         struct drv_context *drvc;
 307
 308         if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
 309                 sr_err("zeroplus: driver context malloc failed.");
 310                 return SR_ERR_MALLOC;
 311         }
 312         drvc->sr_ctx = sr_ctx;
 313         zdi->priv = drvc;
 314
 315         return SR_OK;
 316 }
 317
 318 static GSList *hw_scan(GSList *options)
 319 {
 320         struct sr_dev_inst *sdi;
 321         struct sr_probe *probe;
 322         struct drv_context *drvc;
 323         struct dev_context *devc;
 324         model_t *prof;
 325         struct libusb_device_descriptor des;
 326         libusb_device **devlist;
 327         GSList *devices;
 328         int ret, devcnt, i, j;
 329
 330         (void)options;
 331
 332         drvc = zdi->priv;
 333         devices = NULL;
 334
 335         clear_instances();
 336
 337         /* Find all ZEROPLUS analyzers and add them to device list. */
 338         devcnt = 0;
 339         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); /* TODO: Errors. */
 340
 341         for (i = 0; devlist[i]; i++) {
 342                 ret = libusb_get_device_descriptor(devlist[i], &des);
 343                 if (ret != 0) {
 344                         sr_err("zp: failed to get device descriptor: %s",
 345                                libusb_error_name(ret));
 346                         continue;
 347                 }
 348
 349                 prof = NULL;
 350                 for (j = 0; j < zeroplus_models[j].vid; j++) {
 351                         if (des.idVendor == zeroplus_models[j].vid &&
 352                                 des.idProduct == zeroplus_models[j].pid) {
 353                                 prof = &zeroplus_models[j];
 354                         }
 355                 }
 356                 /* Skip if the device was not found */
 357                 if (!prof)
 358                         continue;
 359                 sr_info("zp: Found ZEROPLUS model %s", prof->model_name);
 360
 361                 /* Register the device with libsigrok. */
 362                 if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE,
 363                                 VENDOR_NAME, prof->model_name, NULL))) {
 364                         sr_err("zp: %s: sr_dev_inst_new failed", __func__);
 365                         return NULL;
 366                 }
 367                 sdi->driver = zdi;
 368
 369                 /* Allocate memory for our private driver context. */
 370                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 371                         sr_err("zp: %s: devc malloc failed", __func__);
 372                         return NULL;
 373                 }
 374                 sdi->priv = devc;
 375                 devc->num_channels = prof->channels;
 376 #ifdef ZP_EXPERIMENTAL
 377                 devc->max_memory_size = 128 * 1024;
 378                 devc->max_samplerate = 200;
 379 #else
 380                 devc->max_memory_size = prof->sample_depth * 1024;
 381                 devc->max_samplerate = prof->max_sampling_freq;
 382 #endif
 383                 devc->max_samplerate *= SR_MHZ(1);
 384                 devc->memory_size = MEMORY_SIZE_8K;
 385                 // memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 386
 387                 /* Fill in probelist according to this device's profile. */
 388                 for (j = 0; j < devc->num_channels; j++) {
 389                         if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
 390                                         probe_names[j])))
 391                                 return NULL;
 392                         sdi->probes = g_slist_append(sdi->probes, probe);
 393                 }
 394
 395                 devices = g_slist_append(devices, sdi);
 396                 drvc->instances = g_slist_append(drvc->instances, sdi);
 397                 devc->usb = sr_usb_dev_inst_new(
 398                         libusb_get_bus_number(devlist[i]),
 399                         libusb_get_device_address(devlist[i]), NULL);
 400                 devcnt++;
 401
 402         }
 403         libusb_free_device_list(devlist, 1);
 404
 405         return devices;
 406 }
 407
 408 static GSList *hw_dev_list(void)
 409 {
 410         struct drv_context *drvc;
 411
 412         drvc = zdi->priv;
 413
 414         return drvc->instances;
 415 }
 416
 417 static int hw_dev_open(struct sr_dev_inst *sdi)
 418 {
 419         struct dev_context *devc;
 420         struct drv_context *drvc = zdi->priv;
 421         libusb_device **devlist, *dev;
 422         struct libusb_device_descriptor des;
 423         int device_count, ret, i;
 424
 425         if (!(devc = sdi->priv)) {
 426                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 427                 return SR_ERR_ARG;
 428         }
 429
 430         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx,
 431                                               &devlist);
 432         if (device_count < 0) {
 433                 sr_err("zp: Failed to retrieve device list");
 434                 return SR_ERR;
 435         }
 436
 437         dev = NULL;
 438         for (i = 0; i < device_count; i++) {
 439                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 440                         sr_err("zp: Failed to get device descriptor: %s.",
 441                                libusb_error_name(ret));
 442                         continue;
 443                 }
 444                 if (libusb_get_bus_number(devlist[i]) == devc->usb->bus
 445                     && libusb_get_device_address(devlist[i]) == devc->usb->address) {
 446                         dev = devlist[i];
 447                         break;
 448                 }
 449         }
 450         if (!dev) {
 451                 sr_err("device on bus %d address %d disappeared!",
 452                                 devc->usb->bus, devc->usb->address);
 453                 return SR_ERR;
 454         }
 455
 456         if (!(ret = libusb_open(dev, &(devc->usb->devhdl)))) {
 457                 sdi->status = SR_ST_ACTIVE;
 458                 sr_info("zp: opened device %d on %d.%d interface %d",
 459                         sdi->index, devc->usb->bus,
 460                         devc->usb->address, USB_INTERFACE);
 461         } else {
 462                 sr_err("zp: failed to open device: %s", libusb_error_name(ret));
 463                 return SR_ERR;
 464         }
 465
 466         ret = libusb_set_configuration(devc->usb->devhdl, USB_CONFIGURATION);
 467         if (ret < 0) {
 468                 sr_err("zp: Unable to set USB configuration %d: %s",
 469                        USB_CONFIGURATION, libusb_error_name(ret));
 470                 return SR_ERR;
 471         }
 472
 473         ret = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE);
 474         if (ret != 0) {
 475                 sr_err("zp: Unable to claim interface: %s",
 476                        libusb_error_name(ret));
 477                 return SR_ERR;
 478         }
 479
 480         /* Set default configuration after power on */
 481         if (analyzer_read_status(devc->usb->devhdl) == 0)
 482                 analyzer_configure(devc->usb->devhdl);
 483
 484         analyzer_reset(devc->usb->devhdl);
 485         analyzer_initialize(devc->usb->devhdl);
 486
 487         //analyzer_set_memory_size(MEMORY_SIZE_512K);
 488         // analyzer_set_freq(g_freq, g_freq_scale);
 489         analyzer_set_trigger_count(1);
 490         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 491         // * get_memory_size(g_memory_size)) / 100) >> 2);
 492
 493 #if 0
 494         if (g_double_mode == 1)
 495                 analyzer_set_compression(COMPRESSION_DOUBLE);
 496         else if (g_compression == 1)
 497                 analyzer_set_compression(COMPRESSION_ENABLE);
 498         else
 499 #endif
 500         analyzer_set_compression(COMPRESSION_NONE);
 501
 502         if (devc->cur_samplerate == 0) {
 503                 /* Samplerate hasn't been set. Default to 1MHz. */
 504                 analyzer_set_freq(1, FREQ_SCALE_MHZ);
 505                 devc->cur_samplerate = SR_MHZ(1);
 506         }
 507
 508         return SR_OK;
 509 }
 510
 511 static int hw_dev_close(struct sr_dev_inst *sdi)
 512 {
 513         struct dev_context *devc;
 514
 515         if (!(devc = sdi->priv)) {
 516                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 517                 return SR_ERR;
 518         }
 519
 520         if (!devc->usb->devhdl)
 521                 return SR_ERR;
 522
 523         sr_info("zp: closing device %d on %d.%d interface %d", sdi->index,
 524                 devc->usb->bus, devc->usb->address, USB_INTERFACE);
 525         libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
 526         libusb_reset_device(devc->usb->devhdl);
 527         libusb_close(devc->usb->devhdl);
 528         devc->usb->devhdl = NULL;
 529         sdi->status = SR_ST_INACTIVE;
 530
 531         return SR_OK;
 532 }
 533
 534 static int hw_cleanup(void)
 535 {
 536         struct drv_context *drvc;
 537
 538         if (!(drvc = zdi->priv))
 539                 return SR_OK;
 540
 541         clear_instances();
 542
 543         return SR_OK;
 544 }
 545
 546 static int hw_info_get(int info_id, const void **data,
 547        const struct sr_dev_inst *sdi)
 548 {
 549         struct dev_context *devc;
 550
 551         switch (info_id) {
 552         case SR_DI_HWCAPS:
 553                 *data = hwcaps;
 554                 break;
 555         case SR_DI_NUM_PROBES:
 556                 if (sdi) {
 557                         devc = sdi->priv;
 558                         *data = GINT_TO_POINTER(devc->num_channels);
 559                         sr_spew("zp: %s: Returning number of channels: %d.",
 560                                         __func__, devc->num_channels);
 561                 } else
 562                         return SR_ERR;
 563                 break;
 564         case SR_DI_PROBE_NAMES:
 565                 *data = probe_names;
 566                 sr_spew("zp: %s: Returning probenames.", __func__);
 567                 break;
 568         case SR_DI_SAMPLERATES:
 569                 *data = &samplerates;
 570                 sr_spew("zp: %s: Returning samplerates.", __func__);
 571                 break;
 572         case SR_DI_TRIGGER_TYPES:
 573                 *data = TRIGGER_TYPES;
 574                 sr_spew("zp: %s: Returning triggertypes: %s.", __func__, TRIGGER_TYPES);
 575                 break;
 576         case SR_DI_CUR_SAMPLERATE:
 577                 if (sdi) {
 578                         devc = sdi->priv;
 579                         *data = &devc->cur_samplerate;
 580                         sr_spew("zp: %s: Returning samplerate: %" PRIu64 "Hz.",
 581                                 __func__, devc->cur_samplerate);
 582                 } else
 583                         return SR_ERR;
 584                 break;
 585         default:
 586                 return SR_ERR_ARG;
 587         }
 588
 589         return SR_OK;
 590 }
 591
 592 static int set_samplerate(struct dev_context *devc, uint64_t samplerate)
 593 {
 594         int i;
 595
 596         for (i = 0; supported_samplerates[i]; i++)
 597                 if (samplerate == supported_samplerates[i])
 598                         break;
 599         if (!supported_samplerates[i] || samplerate > devc->max_samplerate) {
 600                 sr_err("zp: %s: unsupported samplerate", __func__);
 601                 return SR_ERR_ARG;
 602         }
 603
 604         sr_info("zp: Setting samplerate to %" PRIu64 "Hz.", samplerate);
 605
 606         if (samplerate >= SR_MHZ(1))
 607                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 608         else if (samplerate >= SR_KHZ(1))
 609                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 610         else
 611                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 612
 613         devc->cur_samplerate = samplerate;
 614
 615         return SR_OK;
 616 }
 617
 618 static int set_limit_samples(struct dev_context *devc, uint64_t samples)
 619 {
 620         devc->limit_samples = samples;
 621
 622         if (samples <= 2 * 1024)
 623                 devc->memory_size = MEMORY_SIZE_8K;
 624         else if (samples <= 16 * 1024)
 625                 devc->memory_size = MEMORY_SIZE_64K;
 626         else if (samples <= 32 * 1024 ||
 627                  devc->max_memory_size <= 32 * 1024)
 628                 devc->memory_size = MEMORY_SIZE_128K;
 629         else
 630                 devc->memory_size = MEMORY_SIZE_512K;
 631
 632         sr_info("zp: Setting memory size to %dK.",
 633                 get_memory_size(devc->memory_size) / 1024);
 634
 635         analyzer_set_memory_size(devc->memory_size);
 636
 637         return SR_OK;
 638 }
 639
 640 static int set_capture_ratio(struct dev_context *devc, uint64_t ratio)
 641 {
 642         if (ratio > 100) {
 643                 sr_err("zp: %s: invalid capture ratio", __func__);
 644                 return SR_ERR_ARG;
 645         }
 646
 647         devc->capture_ratio = ratio;
 648
 649         sr_info("zp: Setting capture ratio to %d%%.", devc->capture_ratio);
 650
 651         return SR_OK;
 652 }
 653
 654 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 655                              const void *value)
 656 {
 657         struct dev_context *devc;
 658
 659         if (!sdi) {
 660                 sr_err("zp: %s: sdi was NULL", __func__);
 661                 return SR_ERR_ARG;
 662         }
 663
 664         if (!(devc = sdi->priv)) {
 665                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 666                 return SR_ERR_ARG;
 667         }
 668
 669         switch (hwcap) {
 670         case SR_HWCAP_SAMPLERATE:
 671                 return set_samplerate(devc, *(const uint64_t *)value);
 672         case SR_HWCAP_LIMIT_SAMPLES:
 673                 return set_limit_samples(devc, *(const uint64_t *)value);
 674         case SR_HWCAP_CAPTURE_RATIO:
 675                 return set_capture_ratio(devc, *(const uint64_t *)value);
 676         default:
 677                 return SR_ERR;
 678         }
 679 }
 680
 681 static void set_triggerbar(struct dev_context *devc)
 682 {
 683         unsigned int ramsize;
 684         unsigned int n;
 685         unsigned int triggerbar;
 686
 687         ramsize = get_memory_size(devc->memory_size) / 4;
 688         if (devc->trigger) {
 689                 n = ramsize;
 690                 if (devc->max_memory_size < n)
 691                         n = devc->max_memory_size;
 692                 if (devc->limit_samples < n)
 693                         n = devc->limit_samples;
 694                 n = n * devc->capture_ratio / 100;
 695                 if (n > ramsize - 8)
 696                         triggerbar = ramsize - 8;
 697                 else
 698                         triggerbar = n;
 699         } else {
 700                 triggerbar = 0;
 701         }
 702         analyzer_set_triggerbar_address(triggerbar);
 703         analyzer_set_ramsize_trigger_address(ramsize - triggerbar);
 704
 705         sr_dbg("zp: triggerbar_address = %d(0x%x)", triggerbar, triggerbar);
 706         sr_dbg("zp: ramsize_triggerbar_address = %d(0x%x)",
 707                ramsize - triggerbar, ramsize - triggerbar);
 708 }
 709
 710 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 711                 void *cb_data)
 712 {
 713         struct sr_datafeed_packet packet;
 714         struct sr_datafeed_logic logic;
 715         struct sr_datafeed_header header;
 716         struct sr_datafeed_meta_logic meta;
 717         //uint64_t samples_read;
 718         int res;
 719         unsigned int packet_num;
 720         unsigned int n;
 721         unsigned char *buf;
 722         struct dev_context *devc;
 723
 724         if (!(devc = sdi->priv)) {
 725                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 726                 return SR_ERR_ARG;
 727         }
 728
 729         if (configure_probes(sdi) != SR_OK) {
 730                 sr_err("zp: failed to configured probes");
 731                 return SR_ERR;
 732         }
 733
 734         set_triggerbar(devc);
 735
 736         /* push configured settings to device */
 737         analyzer_configure(devc->usb->devhdl);
 738
 739         analyzer_start(devc->usb->devhdl);
 740         sr_info("zp: Waiting for data");
 741         analyzer_wait_data(devc->usb->devhdl);
 742
 743         sr_info("zp: Stop address    = 0x%x",
 744                 analyzer_get_stop_address(devc->usb->devhdl));
 745         sr_info("zp: Now address     = 0x%x",
 746                 analyzer_get_now_address(devc->usb->devhdl));
 747         sr_info("zp: Trigger address = 0x%x",
 748                 analyzer_get_trigger_address(devc->usb->devhdl));
 749
 750         packet.type = SR_DF_HEADER;
 751         packet.payload = &header;
 752         header.feed_version = 1;
 753         gettimeofday(&header.starttime, NULL);
 754         sr_session_send(cb_data, &packet);
 755
 756         /* Send metadata about the SR_DF_LOGIC packets to come. */
 757         packet.type = SR_DF_META_LOGIC;
 758         packet.payload = &meta;
 759         meta.samplerate = devc->cur_samplerate;
 760         meta.num_probes = devc->num_channels;
 761         sr_session_send(cb_data, &packet);
 762
 763         if (!(buf = g_try_malloc(PACKET_SIZE))) {
 764                 sr_err("zp: %s: buf malloc failed", __func__);
 765                 return SR_ERR_MALLOC;
 766         }
 767
 768         //samples_read = 0;
 769         analyzer_read_start(devc->usb->devhdl);
 770         /* Send the incoming transfer to the session bus. */
 771         n = get_memory_size(devc->memory_size);
 772         if (devc->max_memory_size * 4 < n)
 773                 n = devc->max_memory_size * 4;
 774         for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
 775                 res = analyzer_read_data(devc->usb->devhdl, buf, PACKET_SIZE);
 776                 sr_info("zp: Tried to read %d bytes, actually read %d bytes",
 777                         PACKET_SIZE, res);
 778
 779                 packet.type = SR_DF_LOGIC;
 780                 packet.payload = &logic;
 781                 logic.length = PACKET_SIZE;
 782                 logic.unitsize = 4;
 783                 logic.data = buf;
 784                 sr_session_send(cb_data, &packet);
 785                 //samples_read += res / 4;
 786         }
 787         analyzer_read_stop(devc->usb->devhdl);
 788         g_free(buf);
 789
 790         packet.type = SR_DF_END;
 791         sr_session_send(cb_data, &packet);
 792
 793         return SR_OK;
 794 }
 795
 796 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
 797 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 798 {
 799         struct sr_datafeed_packet packet;
 800         struct dev_context *devc;
 801
 802         packet.type = SR_DF_END;
 803         sr_session_send(cb_data, &packet);
 804
 805         if (!(devc = sdi->priv)) {
 806                 sr_err("zp: %s: sdi->priv was NULL", __func__);
 807                 return SR_ERR_BUG;
 808         }
 809
 810         analyzer_reset(devc->usb->devhdl);
 811         /* TODO: Need to cancel and free any queued up transfers. */
 812
 813         return SR_OK;
 814 }
 815
 816 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info = {
 817         .name = "zeroplus-logic-cube",
 818         .longname = "ZEROPLUS Logic Cube LAP-C series",
 819         .api_version = 1,
 820         .init = hw_init,
 821         .cleanup = hw_cleanup,
 822         .scan = hw_scan,
 823         .dev_list = hw_dev_list,
 824         .dev_clear = hw_cleanup,
 825         .dev_open = hw_dev_open,
 826         .dev_close = hw_dev_close,
 827         .info_get = hw_info_get,
 828         .dev_config_set = hw_dev_config_set,
 829         .dev_acquisition_start = hw_dev_acquisition_start,
 830         .dev_acquisition_stop = hw_dev_acquisition_stop,
 831         .priv = NULL,
 832 };