hardware/zeroplus-logic-cube/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "protocol.h"
  21
  22 #define VENDOR_NAME                     "ZEROPLUS"
  23 #define USB_INTERFACE                   0
  24 #define USB_CONFIGURATION               1
  25 #define NUM_TRIGGER_STAGES              4
  26 #define TRIGGER_TYPE                    "01"
  27 #define PACKET_SIZE                     2048    /* ?? */
  28
  29 //#define ZP_EXPERIMENTAL
  30
  31 struct zp_model {
  32         uint16_t vid;
  33         uint16_t pid;
  34         char *model_name;
  35         unsigned int channels;
  36         unsigned int sample_depth;      /* In Ksamples/channel */
  37         unsigned int max_sampling_freq;
  38 };
  39
  40 /*
  41  * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
  42  * same 128K sample depth.
  43  */
  44 static const struct zp_model zeroplus_models[] = {
  45         {0x0c12, 0x7002, "LAP-16128U",    16, 128,  200},
  46         {0x0c12, 0x7009, "LAP-C(16064)",  16, 64,   100},
  47         {0x0c12, 0x700a, "LAP-C(16128)",  16, 128,  200},
  48         {0x0c12, 0x700b, "LAP-C(32128)",  32, 128,  200},
  49         {0x0c12, 0x700c, "LAP-C(321000)", 32, 1024, 200},
  50         {0x0c12, 0x700d, "LAP-C(322000)", 32, 2048, 200},
  51         {0x0c12, 0x700e, "LAP-C(16032)",  16, 32,   100},
  52         {0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
  53         { 0, 0, 0, 0, 0, 0 }
  54 };
  55
  56 static const int32_t hwcaps[] = {
  57         SR_CONF_LOGIC_ANALYZER,
  58         SR_CONF_SAMPLERATE,
  59         SR_CONF_TRIGGER_TYPE,
  60         SR_CONF_CAPTURE_RATIO,
  61         SR_CONF_VOLTAGE_THRESHOLD,
  62         SR_CONF_LIMIT_SAMPLES,
  63 };
  64
  65 /*
  66  * ZEROPLUS LAP-C (16032) numbers the 16 channels A0-A7 and B0-B7.
  67  * We currently ignore other untested/unsupported devices here.
  68  */
  69 static const char *channel_names[] = {
  70         "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  71         "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7",
  72         "C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7",
  73         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  74         NULL,
  75 };
  76
  77 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
  78 static struct sr_dev_driver *di = &zeroplus_logic_cube_driver_info;
  79
  80 /*
  81  * The hardware supports more samplerates than these, but these are the
  82  * options hardcoded into the vendor's Windows GUI.
  83  */
  84
  85 static const uint64_t samplerates_100[] = {
  86         SR_HZ(100),
  87         SR_HZ(500),
  88         SR_KHZ(1),
  89         SR_KHZ(5),
  90         SR_KHZ(25),
  91         SR_KHZ(50),
  92         SR_KHZ(100),
  93         SR_KHZ(200),
  94         SR_KHZ(400),
  95         SR_KHZ(800),
  96         SR_MHZ(1),
  97         SR_MHZ(10),
  98         SR_MHZ(25),
  99         SR_MHZ(50),
 100         SR_MHZ(80),
 101         SR_MHZ(100),
 102 };
 103
 104 const uint64_t samplerates_200[] = {
 105         SR_HZ(100),
 106         SR_HZ(500),
 107         SR_KHZ(1),
 108         SR_KHZ(5),
 109         SR_KHZ(25),
 110         SR_KHZ(50),
 111         SR_KHZ(100),
 112         SR_KHZ(200),
 113         SR_KHZ(400),
 114         SR_KHZ(800),
 115         SR_MHZ(1),
 116         SR_MHZ(10),
 117         SR_MHZ(25),
 118         SR_MHZ(50),
 119         SR_MHZ(80),
 120         SR_MHZ(100),
 121         SR_MHZ(150),
 122         SR_MHZ(200),
 123 };
 124
 125 static int dev_close(struct sr_dev_inst *sdi);
 126
 127 #if 0
 128 static int configure_channels(const struct sr_dev_inst *sdi)
 129 {
 130         struct dev_context *devc;
 131         const struct sr_channel *ch;
 132         const GSList *l;
 133         int channel_bit, stage, i;
 134         char *tc;
 135
 136         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 137         devc = sdi->priv;
 138
 139         devc->channel_mask = 0;
 140         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 141                 devc->trigger_mask[i] = 0;
 142                 devc->trigger_value[i] = 0;
 143         }
 144
 145         stage = -1;
 146         for (l = sdi->channels; l; l = l->next) {
 147                 ch = (struct sr_channel *)l->data;
 148                 if (ch->enabled == FALSE)
 149                         continue;
 150                 channel_bit = 1 << (ch->index);
 151                 devc->channel_mask |= channel_bit;
 152
 153                 if (ch->trigger) {
 154                         stage = 0;
 155                         for (tc = ch->trigger; *tc; tc++) {
 156                                 devc->trigger_mask[stage] |= channel_bit;
 157                                 if (*tc == '1')
 158                                         devc->trigger_value[stage] |= channel_bit;
 159                                 stage++;
 160                                 if (stage > NUM_TRIGGER_STAGES)
 161                                         return SR_ERR;
 162                         }
 163                 }
 164         }
 165
 166         return SR_OK;
 167 }
 168 #endif
 169
 170 static int configure_channels(const struct sr_dev_inst *sdi)
 171 {
 172         struct dev_context *devc;
 173         const GSList *l;
 174         const struct sr_channel *ch;
 175         char *tc;
 176         int type;
 177
 178         /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
 179         devc = sdi->priv;
 180
 181         for (l = sdi->channels; l; l = l->next) {
 182                 ch = (struct sr_channel *)l->data;
 183                 if (ch->enabled == FALSE)
 184                         continue;
 185
 186                 if ((tc = ch->trigger)) {
 187                         switch (*tc) {
 188                         case '1':
 189                                 type = TRIGGER_HIGH;
 190                                 break;
 191                         case '0':
 192                                 type = TRIGGER_LOW;
 193                                 break;
 194 #if 0
 195                         case 'r':
 196                                 type = TRIGGER_POSEDGE;
 197                                 break;
 198                         case 'f':
 199                                 type = TRIGGER_NEGEDGE;
 200                                 break;
 201                         case 'c':
 202                                 type = TRIGGER_ANYEDGE;
 203                                 break;
 204 #endif
 205                         default:
 206                                 return SR_ERR;
 207                         }
 208                         analyzer_add_trigger(ch->index, type);
 209                         devc->trigger = 1;
 210                 }
 211         }
 212
 213         return SR_OK;
 214 }
 215
 216 SR_PRIV int zp_set_samplerate(struct dev_context *devc, uint64_t samplerate)
 217 {
 218         int i;
 219
 220         for (i = 0; ARRAY_SIZE(samplerates_200); i++)
 221                 if (samplerate == samplerates_200[i])
 222                         break;
 223
 224         if (i == ARRAY_SIZE(samplerates_200) || samplerate > devc->max_samplerate) {
 225                 sr_err("Unsupported samplerate: %" PRIu64 "Hz.", samplerate);
 226                 return SR_ERR_ARG;
 227         }
 228
 229         sr_info("Setting samplerate to %" PRIu64 "Hz.", samplerate);
 230
 231         if (samplerate >= SR_MHZ(1))
 232                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 233         else if (samplerate >= SR_KHZ(1))
 234                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 235         else
 236                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 237
 238         devc->cur_samplerate = samplerate;
 239
 240         return SR_OK;
 241 }
 242
 243 static int init(struct sr_context *sr_ctx)
 244 {
 245         return std_init(sr_ctx, di, LOG_PREFIX);
 246 }
 247
 248 static GSList *scan(GSList *options)
 249 {
 250         struct sr_dev_inst *sdi;
 251         struct sr_channel *ch;
 252         struct drv_context *drvc;
 253         struct dev_context *devc;
 254         const struct zp_model *prof;
 255         struct libusb_device_descriptor des;
 256         libusb_device **devlist;
 257         GSList *devices;
 258         int ret, devcnt, i, j;
 259
 260         (void)options;
 261
 262         drvc = di->priv;
 263
 264         devices = NULL;
 265
 266         /* Find all ZEROPLUS analyzers and add them to device list. */
 267         devcnt = 0;
 268         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); /* TODO: Errors. */
 269
 270         for (i = 0; devlist[i]; i++) {
 271                 ret = libusb_get_device_descriptor(devlist[i], &des);
 272                 if (ret != 0) {
 273                         sr_err("Failed to get device descriptor: %s.",
 274                                libusb_error_name(ret));
 275                         continue;
 276                 }
 277
 278                 prof = NULL;
 279                 for (j = 0; j < zeroplus_models[j].vid; j++) {
 280                         if (des.idVendor == zeroplus_models[j].vid &&
 281                                 des.idProduct == zeroplus_models[j].pid) {
 282                                 prof = &zeroplus_models[j];
 283                         }
 284                 }
 285                 /* Skip if the device was not found. */
 286                 if (!prof)
 287                         continue;
 288                 sr_info("Found ZEROPLUS %s.", prof->model_name);
 289
 290                 /* Register the device with libsigrok. */
 291                 if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE,
 292                                 VENDOR_NAME, prof->model_name, NULL))) {
 293                         sr_err("%s: sr_dev_inst_new failed", __func__);
 294                         return NULL;
 295                 }
 296                 sdi->driver = di;
 297
 298                 /* Allocate memory for our private driver context. */
 299                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 300                         sr_err("Device context malloc failed.");
 301                         return NULL;
 302                 }
 303
 304                 sdi->priv = devc;
 305                 devc->prof = prof;
 306                 devc->num_channels = prof->channels;
 307 #ifdef ZP_EXPERIMENTAL
 308                 devc->max_sample_depth = 128 * 1024;
 309                 devc->max_samplerate = 200;
 310 #else
 311                 devc->max_sample_depth = prof->sample_depth * 1024;
 312                 devc->max_samplerate = prof->max_sampling_freq;
 313 #endif
 314                 devc->max_samplerate *= SR_MHZ(1);
 315                 devc->memory_size = MEMORY_SIZE_8K;
 316                 // memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 317
 318                 /* Fill in channellist according to this device's profile. */
 319                 for (j = 0; j < devc->num_channels; j++) {
 320                         if (!(ch = sr_channel_new(j, SR_CHANNEL_LOGIC, TRUE,
 321                                         channel_names[j])))
 322                                 return NULL;
 323                         sdi->channels = g_slist_append(sdi->channels, ch);
 324                 }
 325
 326                 devices = g_slist_append(devices, sdi);
 327                 drvc->instances = g_slist_append(drvc->instances, sdi);
 328                 sdi->inst_type = SR_INST_USB;
 329                 sdi->conn = sr_usb_dev_inst_new(
 330                         libusb_get_bus_number(devlist[i]),
 331                         libusb_get_device_address(devlist[i]), NULL);
 332                 devcnt++;
 333
 334         }
 335         libusb_free_device_list(devlist, 1);
 336
 337         return devices;
 338 }
 339
 340 static GSList *dev_list(void)
 341 {
 342         return ((struct drv_context *)(di->priv))->instances;
 343 }
 344
 345 static int dev_open(struct sr_dev_inst *sdi)
 346 {
 347         struct dev_context *devc;
 348         struct drv_context *drvc;
 349         struct sr_usb_dev_inst *usb;
 350         libusb_device **devlist, *dev;
 351         struct libusb_device_descriptor des;
 352         int device_count, ret, i;
 353
 354         drvc = di->priv;
 355         usb = sdi->conn;
 356
 357         if (!(devc = sdi->priv)) {
 358                 sr_err("%s: sdi->priv was NULL", __func__);
 359                 return SR_ERR_ARG;
 360         }
 361
 362         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx,
 363                                               &devlist);
 364         if (device_count < 0) {
 365                 sr_err("Failed to retrieve device list.");
 366                 return SR_ERR;
 367         }
 368
 369         dev = NULL;
 370         for (i = 0; i < device_count; i++) {
 371                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 372                         sr_err("Failed to get device descriptor: %s.",
 373                                libusb_error_name(ret));
 374                         continue;
 375                 }
 376                 if (libusb_get_bus_number(devlist[i]) == usb->bus
 377                     && libusb_get_device_address(devlist[i]) == usb->address) {
 378                         dev = devlist[i];
 379                         break;
 380                 }
 381         }
 382         if (!dev) {
 383                 sr_err("Device on bus %d address %d disappeared!",
 384                        usb->bus, usb->address);
 385                 return SR_ERR;
 386         }
 387
 388         if (!(ret = libusb_open(dev, &(usb->devhdl)))) {
 389                 sdi->status = SR_ST_ACTIVE;
 390                 sr_info("Opened device %d on %d.%d interface %d.",
 391                         sdi->index, usb->bus, usb->address, USB_INTERFACE);
 392         } else {
 393                 sr_err("Failed to open device: %s.", libusb_error_name(ret));
 394                 return SR_ERR;
 395         }
 396
 397         ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION);
 398         if (ret < 0) {
 399                 sr_err("Unable to set USB configuration %d: %s.",
 400                        USB_CONFIGURATION, libusb_error_name(ret));
 401                 return SR_ERR;
 402         }
 403
 404         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 405         if (ret != 0) {
 406                 sr_err("Unable to claim interface: %s.",
 407                        libusb_error_name(ret));
 408                 return SR_ERR;
 409         }
 410
 411         /* Set default configuration after power on. */
 412         if (analyzer_read_status(usb->devhdl) == 0)
 413                 analyzer_configure(usb->devhdl);
 414
 415         analyzer_reset(usb->devhdl);
 416         analyzer_initialize(usb->devhdl);
 417
 418         //analyzer_set_memory_size(MEMORY_SIZE_512K);
 419         // analyzer_set_freq(g_freq, g_freq_scale);
 420         analyzer_set_trigger_count(1);
 421         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 422         // * get_memory_size(g_memory_size)) / 100) >> 2);
 423
 424 #if 0
 425         if (g_double_mode == 1)
 426                 analyzer_set_compression(COMPRESSION_DOUBLE);
 427         else if (g_compression == 1)
 428                 analyzer_set_compression(COMPRESSION_ENABLE);
 429         else
 430 #endif
 431         analyzer_set_compression(COMPRESSION_NONE);
 432
 433         if (devc->cur_samplerate == 0) {
 434                 /* Samplerate hasn't been set. Default to 1MHz. */
 435                 analyzer_set_freq(1, FREQ_SCALE_MHZ);
 436                 devc->cur_samplerate = SR_MHZ(1);
 437         }
 438
 439         if (devc->cur_threshold == 0)
 440                 set_voltage_threshold(devc, 1.5);
 441
 442         return SR_OK;
 443 }
 444
 445 static int dev_close(struct sr_dev_inst *sdi)
 446 {
 447         struct sr_usb_dev_inst *usb;
 448
 449         usb = sdi->conn;
 450
 451         if (!usb->devhdl)
 452                 return SR_ERR;
 453
 454         sr_info("Closing device %d on %d.%d interface %d.", sdi->index,
 455                 usb->bus, usb->address, USB_INTERFACE);
 456         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 457         libusb_reset_device(usb->devhdl);
 458         libusb_close(usb->devhdl);
 459         usb->devhdl = NULL;
 460         sdi->status = SR_ST_INACTIVE;
 461
 462         return SR_OK;
 463 }
 464
 465 static int cleanup(void)
 466 {
 467         return std_dev_clear(di, NULL);
 468 }
 469
 470 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
 471                 const struct sr_channel_group *cg)
 472 {
 473         struct dev_context *devc;
 474
 475         (void)cg;
 476
 477         switch (id) {
 478         case SR_CONF_SAMPLERATE:
 479                 if (sdi) {
 480                         devc = sdi->priv;
 481                         *data = g_variant_new_uint64(devc->cur_samplerate);
 482                         sr_spew("Returning samplerate: %" PRIu64 "Hz.",
 483                                 devc->cur_samplerate);
 484                 } else
 485                         return SR_ERR_ARG;
 486                 break;
 487         case SR_CONF_CAPTURE_RATIO:
 488                 if (sdi) {
 489                         devc = sdi->priv;
 490                         *data = g_variant_new_uint64(devc->capture_ratio);
 491                 } else
 492                         return SR_ERR_ARG;
 493                 break;
 494         case SR_CONF_VOLTAGE_THRESHOLD:
 495                 if (sdi) {
 496                         GVariant *range[2];
 497                         devc = sdi->priv;
 498                         range[0] = g_variant_new_double(devc->cur_threshold);
 499                         range[1] = g_variant_new_double(devc->cur_threshold);
 500                         *data = g_variant_new_tuple(range, 2);
 501                 } else
 502                         return SR_ERR_ARG;
 503                 break;
 504         default:
 505                 return SR_ERR_NA;
 506         }
 507
 508         return SR_OK;
 509 }
 510
 511 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
 512                 const struct sr_channel_group *cg)
 513 {
 514         struct dev_context *devc;
 515         gdouble low, high;
 516
 517         (void)cg;
 518
 519         if (sdi->status != SR_ST_ACTIVE)
 520                 return SR_ERR_DEV_CLOSED;
 521
 522         if (!(devc = sdi->priv)) {
 523                 sr_err("%s: sdi->priv was NULL", __func__);
 524                 return SR_ERR_ARG;
 525         }
 526
 527         switch (id) {
 528         case SR_CONF_SAMPLERATE:
 529                 return zp_set_samplerate(devc, g_variant_get_uint64(data));
 530         case SR_CONF_LIMIT_SAMPLES:
 531                 return set_limit_samples(devc, g_variant_get_uint64(data));
 532         case SR_CONF_CAPTURE_RATIO:
 533                 return set_capture_ratio(devc, g_variant_get_uint64(data));
 534         case SR_CONF_VOLTAGE_THRESHOLD:
 535                 g_variant_get(data, "(dd)", &low, &high);
 536                 return set_voltage_threshold(devc, (low + high) / 2.0);
 537         default:
 538                 return SR_ERR_NA;
 539         }
 540
 541         return SR_OK;
 542 }
 543
 544 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 545                 const struct sr_channel_group *cg)
 546 {
 547         struct dev_context *devc;
 548         GVariant *gvar, *grange[2];
 549         GVariantBuilder gvb;
 550         double v;
 551         GVariant *range[2];
 552
 553         (void)cg;
 554
 555         switch (key) {
 556         case SR_CONF_DEVICE_OPTIONS:
 557                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 558                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 559                 break;
 560         case SR_CONF_SAMPLERATE:
 561                 devc = sdi->priv;
 562                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 563                 if (devc->prof->max_sampling_freq == 100) {
 564                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 565                                         samplerates_100, ARRAY_SIZE(samplerates_100),
 566                                         sizeof(uint64_t));
 567                 } else if (devc->prof->max_sampling_freq == 200) {
 568                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 569                                         samplerates_200, ARRAY_SIZE(samplerates_200),
 570                                         sizeof(uint64_t));
 571                 } else {
 572                         sr_err("Internal error: Unknown max. samplerate: %d.",
 573                                devc->prof->max_sampling_freq);
 574                         return SR_ERR_ARG;
 575                 }
 576                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 577                 *data = g_variant_builder_end(&gvb);
 578                 break;
 579         case SR_CONF_TRIGGER_TYPE:
 580                 *data = g_variant_new_string(TRIGGER_TYPE);
 581                 break;
 582         case SR_CONF_VOLTAGE_THRESHOLD:
 583                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 584                 for (v = -6.0; v <= 6.0; v += 0.1) {
 585                         range[0] = g_variant_new_double(v);
 586                         range[1] = g_variant_new_double(v);
 587                         gvar = g_variant_new_tuple(range, 2);
 588                         g_variant_builder_add_value(&gvb, gvar);
 589                 }
 590                 *data = g_variant_builder_end(&gvb);
 591                 break;
 592         case SR_CONF_LIMIT_SAMPLES:
 593                 if (!sdi)
 594                         return SR_ERR_ARG;
 595                 devc = sdi->priv;
 596                 grange[0] = g_variant_new_uint64(0);
 597                 grange[1] = g_variant_new_uint64(devc->max_sample_depth);
 598                 *data = g_variant_new_tuple(grange, 2);
 599                 break;
 600         default:
 601                 return SR_ERR_NA;
 602         }
 603
 604         return SR_OK;
 605 }
 606
 607 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 608                 void *cb_data)
 609 {
 610         struct dev_context *devc;
 611         struct sr_usb_dev_inst *usb;
 612         struct sr_datafeed_packet packet;
 613         struct sr_datafeed_logic logic;
 614         unsigned int samples_read;
 615         int res;
 616         unsigned int packet_num, n;
 617         unsigned char *buf;
 618         unsigned int status;
 619         unsigned int stop_address;
 620         unsigned int now_address;
 621         unsigned int trigger_address;
 622         unsigned int trigger_offset;
 623         unsigned int triggerbar;
 624         unsigned int ramsize_trigger;
 625         unsigned int memory_size;
 626         unsigned int valid_samples;
 627         unsigned int discard;
 628         int trigger_now;
 629
 630         if (sdi->status != SR_ST_ACTIVE)
 631                 return SR_ERR_DEV_CLOSED;
 632
 633         if (!(devc = sdi->priv)) {
 634                 sr_err("%s: sdi->priv was NULL", __func__);
 635                 return SR_ERR_ARG;
 636         }
 637
 638         if (configure_channels(sdi) != SR_OK) {
 639                 sr_err("Failed to configure channels.");
 640                 return SR_ERR;
 641         }
 642
 643         usb = sdi->conn;
 644
 645         set_triggerbar(devc);
 646
 647         /* Push configured settings to device. */
 648         analyzer_configure(usb->devhdl);
 649
 650         analyzer_start(usb->devhdl);
 651         sr_info("Waiting for data.");
 652         analyzer_wait_data(usb->devhdl);
 653
 654         status = analyzer_read_status(usb->devhdl);
 655         stop_address = analyzer_get_stop_address(usb->devhdl);
 656         now_address = analyzer_get_now_address(usb->devhdl);
 657         trigger_address = analyzer_get_trigger_address(usb->devhdl);
 658
 659         triggerbar = analyzer_get_triggerbar_address();
 660         ramsize_trigger = analyzer_get_ramsize_trigger_address();
 661
 662         n = get_memory_size(devc->memory_size);
 663         memory_size = n / 4;
 664
 665         sr_info("Status = 0x%x.", status);
 666         sr_info("Stop address       = 0x%x.", stop_address);
 667         sr_info("Now address        = 0x%x.", now_address);
 668         sr_info("Trigger address    = 0x%x.", trigger_address);
 669         sr_info("Triggerbar address = 0x%x.", triggerbar);
 670         sr_info("Ramsize trigger    = 0x%x.", ramsize_trigger);
 671         sr_info("Memory size        = 0x%x.", memory_size);
 672
 673         /* Send header packet to the session bus. */
 674         std_session_send_df_header(cb_data, LOG_PREFIX);
 675
 676         /* Check for empty capture */
 677         if ((status & STATUS_READY) && !stop_address) {
 678                 packet.type = SR_DF_END;
 679                 sr_session_send(cb_data, &packet);
 680                 return SR_OK;
 681         }
 682
 683         if (!(buf = g_try_malloc(PACKET_SIZE))) {
 684                 sr_err("Packet buffer malloc failed.");
 685                 return SR_ERR_MALLOC;
 686         }
 687
 688         /* Check if the trigger is in the samples we are throwing away */
 689         trigger_now = now_address == trigger_address ||
 690                 ((now_address + 1) % memory_size) == trigger_address;
 691
 692         /*
 693          * STATUS_READY doesn't clear until now_address advances past
 694          * addr 0, but for our logic, clear it in that case
 695          */
 696         if (!now_address)
 697                 status &= ~STATUS_READY;
 698
 699         analyzer_read_start(usb->devhdl);
 700
 701         /* Calculate how much data to discard */
 702         discard = 0;
 703         if (status & STATUS_READY) {
 704                 /*
 705                  * We haven't wrapped around, we need to throw away data from
 706                  * our current position to the end of the buffer.
 707                  * Additionally, the first two samples captured are always
 708                  * bogus.
 709                  */
 710                 discard += memory_size - now_address + 2;
 711                 now_address = 2;
 712         }
 713
 714         /* If we have more samples than we need, discard them */
 715         valid_samples = (stop_address - now_address) % memory_size;
 716         if (valid_samples > ramsize_trigger + triggerbar) {
 717                 discard += valid_samples - (ramsize_trigger + triggerbar);
 718                 now_address += valid_samples - (ramsize_trigger + triggerbar);
 719         }
 720
 721         sr_info("Need to discard %d samples.", discard);
 722
 723         /* Calculate how far in the trigger is */
 724         if (trigger_now)
 725                 trigger_offset = 0;
 726         else
 727                 trigger_offset = (trigger_address - now_address) % memory_size;
 728
 729         /* Recalculate the number of samples available */
 730         valid_samples = (stop_address - now_address) % memory_size;
 731
 732         /* Send the incoming transfer to the session bus. */
 733         samples_read = 0;
 734         for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
 735                 unsigned int len;
 736                 unsigned int buf_offset;
 737
 738                 res = analyzer_read_data(usb->devhdl, buf, PACKET_SIZE);
 739                 sr_info("Tried to read %d bytes, actually read %d bytes.",
 740                         PACKET_SIZE, res);
 741
 742                 if (discard >= PACKET_SIZE / 4) {
 743                         discard -= PACKET_SIZE / 4;
 744                         continue;
 745                 }
 746
 747                 len = PACKET_SIZE - discard * 4;
 748                 buf_offset = discard * 4;
 749                 discard = 0;
 750
 751                 /* Check if we've read all the samples */
 752                 if (samples_read + len / 4 >= valid_samples)
 753                         len = (valid_samples - samples_read) * 4;
 754                 if (!len)
 755                         break;
 756
 757                 if (samples_read < trigger_offset &&
 758                     samples_read + len / 4 > trigger_offset) {
 759                         /* Send out samples remaining before trigger */
 760                         packet.type = SR_DF_LOGIC;
 761                         packet.payload = &logic;
 762                         logic.length = (trigger_offset - samples_read) * 4;
 763                         logic.unitsize = 4;
 764                         logic.data = buf + buf_offset;
 765                         sr_session_send(cb_data, &packet);
 766                         len -= logic.length;
 767                         samples_read += logic.length / 4;
 768                         buf_offset += logic.length;
 769                 }
 770
 771                 if (samples_read == trigger_offset) {
 772                         /* Send out trigger */
 773                         packet.type = SR_DF_TRIGGER;
 774                         packet.payload = NULL;
 775                         sr_session_send(cb_data, &packet);
 776                 }
 777
 778                 /* Send out data (or data after trigger) */
 779                 packet.type = SR_DF_LOGIC;
 780                 packet.payload = &logic;
 781                 logic.length = len;
 782                 logic.unitsize = 4;
 783                 logic.data = buf + buf_offset;
 784                 sr_session_send(cb_data, &packet);
 785                 samples_read += len / 4;
 786         }
 787         analyzer_read_stop(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 dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 798 {
 799         struct dev_context *devc;
 800         struct sr_usb_dev_inst *usb;
 801         struct sr_datafeed_packet packet;
 802
 803         packet.type = SR_DF_END;
 804         sr_session_send(cb_data, &packet);
 805
 806         if (!(devc = sdi->priv)) {
 807                 sr_err("%s: sdi->priv was NULL", __func__);
 808                 return SR_ERR_BUG;
 809         }
 810
 811         usb = sdi->conn;
 812         analyzer_reset(usb->devhdl);
 813         /* TODO: Need to cancel and free any queued up transfers. */
 814
 815         return SR_OK;
 816 }
 817
 818 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info = {
 819         .name = "zeroplus-logic-cube",
 820         .longname = "ZEROPLUS Logic Cube LAP-C series",
 821         .api_version = 1,
 822         .init = init,
 823         .cleanup = cleanup,
 824         .scan = scan,
 825         .dev_list = dev_list,
 826         .dev_clear = NULL,
 827         .config_get = config_get,
 828         .config_set = config_set,
 829         .config_list = config_list,
 830         .dev_open = dev_open,
 831         .dev_close = dev_close,
 832         .dev_acquisition_start = dev_acquisition_start,
 833         .dev_acquisition_stop = dev_acquisition_stop,
 834         .priv = NULL,
 835 };