src/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 PACKET_SIZE                     2048    /* ?? */
  27
  28 //#define ZP_EXPERIMENTAL
  29
  30 struct zp_model {
  31         uint16_t vid;
  32         uint16_t pid;
  33         char *model_name;
  34         unsigned int channels;
  35         unsigned int sample_depth;      /* In Ksamples/channel */
  36         unsigned int max_sampling_freq;
  37 };
  38
  39 /*
  40  * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
  41  * same 128K sample depth.
  42  */
  43 static const struct zp_model zeroplus_models[] = {
  44         {0x0c12, 0x7002, "LAP-16128U",    16, 128,  200},
  45         {0x0c12, 0x7009, "LAP-C(16064)",  16, 64,   100},
  46         {0x0c12, 0x700a, "LAP-C(16128)",  16, 128,  200},
  47         {0x0c12, 0x700b, "LAP-C(32128)",  32, 128,  200},
  48         {0x0c12, 0x700c, "LAP-C(321000)", 32, 1024, 200},
  49         {0x0c12, 0x700d, "LAP-C(322000)", 32, 2048, 200},
  50         {0x0c12, 0x700e, "LAP-C(16032)",  16, 32,   100},
  51         {0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
  52         {0x0c12, 0x7100, "AKIP-9101", 16, 256, 200},
  53         { 0, 0, 0, 0, 0, 0 }
  54 };
  55
  56 static const uint32_t devopts[] = {
  57         SR_CONF_LOGIC_ANALYZER,
  58         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_LIST,
  59         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  60         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  61         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  62         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  63 };
  64
  65 static const int32_t trigger_matches[] = {
  66         SR_TRIGGER_ZERO,
  67         SR_TRIGGER_ONE,
  68 };
  69
  70 /*
  71  * ZEROPLUS LAP-C (16032) numbers the 16 channels A0-A7 and B0-B7.
  72  * We currently ignore other untested/unsupported devices here.
  73  */
  74 static const char *channel_names[] = {
  75         "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  76         "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7",
  77         "C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7",
  78         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  79         NULL,
  80 };
  81
  82 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
  83 static struct sr_dev_driver *di = &zeroplus_logic_cube_driver_info;
  84
  85 /*
  86  * The hardware supports more samplerates than these, but these are the
  87  * options hardcoded into the vendor's Windows GUI.
  88  */
  89
  90 static const uint64_t samplerates_100[] = {
  91         SR_HZ(100),
  92         SR_HZ(500),
  93         SR_KHZ(1),
  94         SR_KHZ(5),
  95         SR_KHZ(25),
  96         SR_KHZ(50),
  97         SR_KHZ(100),
  98         SR_KHZ(200),
  99         SR_KHZ(400),
 100         SR_KHZ(800),
 101         SR_MHZ(1),
 102         SR_MHZ(10),
 103         SR_MHZ(25),
 104         SR_MHZ(50),
 105         SR_MHZ(80),
 106         SR_MHZ(100),
 107 };
 108
 109 const uint64_t samplerates_200[] = {
 110         SR_HZ(100),
 111         SR_HZ(500),
 112         SR_KHZ(1),
 113         SR_KHZ(5),
 114         SR_KHZ(25),
 115         SR_KHZ(50),
 116         SR_KHZ(100),
 117         SR_KHZ(200),
 118         SR_KHZ(400),
 119         SR_KHZ(800),
 120         SR_MHZ(1),
 121         SR_MHZ(10),
 122         SR_MHZ(25),
 123         SR_MHZ(50),
 124         SR_MHZ(80),
 125         SR_MHZ(100),
 126         SR_MHZ(150),
 127         SR_MHZ(200),
 128 };
 129
 130 static int dev_close(struct sr_dev_inst *sdi);
 131
 132 SR_PRIV int zp_set_samplerate(struct dev_context *devc, uint64_t samplerate)
 133 {
 134         int i;
 135
 136         for (i = 0; ARRAY_SIZE(samplerates_200); i++)
 137                 if (samplerate == samplerates_200[i])
 138                         break;
 139
 140         if (i == ARRAY_SIZE(samplerates_200) || samplerate > devc->max_samplerate) {
 141                 sr_err("Unsupported samplerate: %" PRIu64 "Hz.", samplerate);
 142                 return SR_ERR_ARG;
 143         }
 144
 145         sr_info("Setting samplerate to %" PRIu64 "Hz.", samplerate);
 146
 147         if (samplerate >= SR_MHZ(1))
 148                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 149         else if (samplerate >= SR_KHZ(1))
 150                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 151         else
 152                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 153
 154         devc->cur_samplerate = samplerate;
 155
 156         return SR_OK;
 157 }
 158
 159 static int init(struct sr_context *sr_ctx)
 160 {
 161         return std_init(sr_ctx, di, LOG_PREFIX);
 162 }
 163
 164 static GSList *scan(GSList *options)
 165 {
 166         struct sr_dev_inst *sdi;
 167         struct sr_channel *ch;
 168         struct drv_context *drvc;
 169         struct dev_context *devc;
 170         const struct zp_model *prof;
 171         struct libusb_device_descriptor des;
 172         struct libusb_device_handle *hdl;
 173         libusb_device **devlist;
 174         GSList *devices;
 175         int ret, i, j;
 176         char serial_num[64], connection_id[64];
 177
 178         (void)options;
 179
 180         drvc = di->priv;
 181
 182         devices = NULL;
 183
 184         /* Find all ZEROPLUS analyzers and add them to device list. */
 185         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); /* TODO: Errors. */
 186
 187         for (i = 0; devlist[i]; i++) {
 188                 ret = libusb_get_device_descriptor(devlist[i], &des);
 189                 if (ret != 0) {
 190                         sr_err("Failed to get device descriptor: %s.",
 191                                libusb_error_name(ret));
 192                         continue;
 193                 }
 194
 195                 if ((ret = libusb_open(devlist[i], &hdl)) < 0)
 196                         continue;
 197
 198                 if (des.iSerialNumber == 0) {
 199                         serial_num[0] = '\0';
 200                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 201                                 des.iSerialNumber, (unsigned char *) serial_num,
 202                                 sizeof(serial_num))) < 0) {
 203                         sr_warn("Failed to get serial number string descriptor: %s.",
 204                                 libusb_error_name(ret));
 205                         continue;
 206                 }
 207
 208                 libusb_close(hdl);
 209
 210                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 211
 212                 prof = NULL;
 213                 for (j = 0; j < zeroplus_models[j].vid; j++) {
 214                         if (des.idVendor == zeroplus_models[j].vid &&
 215                                 des.idProduct == zeroplus_models[j].pid) {
 216                                 prof = &zeroplus_models[j];
 217                         }
 218                 }
 219                 /* Skip if the device was not found. */
 220                 if (!prof)
 221                         continue;
 222                 sr_info("Found ZEROPLUS %s.", prof->model_name);
 223
 224                 /* Register the device with libsigrok. */
 225                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 226                 sdi->status = SR_ST_INACTIVE;
 227                 sdi->vendor = g_strdup(VENDOR_NAME);
 228                 sdi->model = g_strdup(prof->model_name);
 229                 sdi->driver = di;
 230                 sdi->serial_num = g_strdup(serial_num);
 231                 sdi->connection_id = g_strdup(connection_id);
 232
 233                 /* Allocate memory for our private driver context. */
 234                 devc = g_malloc0(sizeof(struct dev_context));
 235                 sdi->priv = devc;
 236                 devc->prof = prof;
 237                 devc->num_channels = prof->channels;
 238 #ifdef ZP_EXPERIMENTAL
 239                 devc->max_sample_depth = 128 * 1024;
 240                 devc->max_samplerate = 200;
 241 #else
 242                 devc->max_sample_depth = prof->sample_depth * 1024;
 243                 devc->max_samplerate = prof->max_sampling_freq;
 244 #endif
 245                 devc->max_samplerate *= SR_MHZ(1);
 246                 devc->memory_size = MEMORY_SIZE_8K;
 247                 // memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 248
 249                 /* Fill in channellist according to this device's profile. */
 250                 for (j = 0; j < devc->num_channels; j++) {
 251                         if (!(ch = sr_channel_new(j, SR_CHANNEL_LOGIC, TRUE,
 252                                         channel_names[j])))
 253                                 return NULL;
 254                         sdi->channels = g_slist_append(sdi->channels, ch);
 255                 }
 256
 257                 devices = g_slist_append(devices, sdi);
 258                 drvc->instances = g_slist_append(drvc->instances, sdi);
 259                 sdi->inst_type = SR_INST_USB;
 260                 sdi->conn = sr_usb_dev_inst_new(
 261                         libusb_get_bus_number(devlist[i]),
 262                         libusb_get_device_address(devlist[i]), NULL);
 263         }
 264         libusb_free_device_list(devlist, 1);
 265
 266         return devices;
 267 }
 268
 269 static GSList *dev_list(void)
 270 {
 271         return ((struct drv_context *)(di->priv))->instances;
 272 }
 273
 274 static int dev_open(struct sr_dev_inst *sdi)
 275 {
 276         struct dev_context *devc;
 277         struct drv_context *drvc;
 278         struct sr_usb_dev_inst *usb;
 279         libusb_device **devlist, *dev;
 280         int device_count, ret, i;
 281         char connection_id[64];
 282
 283         drvc = di->priv;
 284         usb = sdi->conn;
 285
 286         if (!(devc = sdi->priv)) {
 287                 sr_err("%s: sdi->priv was NULL", __func__);
 288                 return SR_ERR_ARG;
 289         }
 290
 291         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx,
 292                                               &devlist);
 293         if (device_count < 0) {
 294                 sr_err("Failed to retrieve device list.");
 295                 return SR_ERR;
 296         }
 297
 298         dev = NULL;
 299         for (i = 0; i < device_count; i++) {
 300                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 301                 if (!strcmp(sdi->connection_id, connection_id)) {
 302                         dev = devlist[i];
 303                         break;
 304                 }
 305         }
 306         if (!dev) {
 307                 sr_err("Device on %d.%d (logical) / %s (physical) disappeared!",
 308                        usb->bus, usb->address, sdi->connection_id);
 309                 return SR_ERR;
 310         }
 311
 312         if (!(ret = libusb_open(dev, &(usb->devhdl)))) {
 313                 sdi->status = SR_ST_ACTIVE;
 314                 sr_info("Opened device on %d.%d (logical) / %s (physical) interface %d.",
 315                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 316         } else {
 317                 sr_err("Failed to open device: %s.", libusb_error_name(ret));
 318                 return SR_ERR;
 319         }
 320
 321         ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION);
 322         if (ret < 0) {
 323                 sr_err("Unable to set USB configuration %d: %s.",
 324                        USB_CONFIGURATION, libusb_error_name(ret));
 325                 return SR_ERR;
 326         }
 327
 328         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 329         if (ret != 0) {
 330                 sr_err("Unable to claim interface: %s.",
 331                        libusb_error_name(ret));
 332                 return SR_ERR;
 333         }
 334
 335         /* Set default configuration after power on. */
 336         if (analyzer_read_status(usb->devhdl) == 0)
 337                 analyzer_configure(usb->devhdl);
 338
 339         analyzer_reset(usb->devhdl);
 340         analyzer_initialize(usb->devhdl);
 341
 342         //analyzer_set_memory_size(MEMORY_SIZE_512K);
 343         // analyzer_set_freq(g_freq, g_freq_scale);
 344         analyzer_set_trigger_count(1);
 345         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 346         // * get_memory_size(g_memory_size)) / 100) >> 2);
 347
 348 #if 0
 349         if (g_double_mode == 1)
 350                 analyzer_set_compression(COMPRESSION_DOUBLE);
 351         else if (g_compression == 1)
 352                 analyzer_set_compression(COMPRESSION_ENABLE);
 353         else
 354 #endif
 355         analyzer_set_compression(COMPRESSION_NONE);
 356
 357         if (devc->cur_samplerate == 0) {
 358                 /* Samplerate hasn't been set. Default to 1MHz. */
 359                 analyzer_set_freq(1, FREQ_SCALE_MHZ);
 360                 devc->cur_samplerate = SR_MHZ(1);
 361         }
 362
 363         if (devc->cur_threshold == 0)
 364                 set_voltage_threshold(devc, 1.5);
 365
 366         return SR_OK;
 367 }
 368
 369 static int dev_close(struct sr_dev_inst *sdi)
 370 {
 371         struct sr_usb_dev_inst *usb;
 372
 373         usb = sdi->conn;
 374
 375         if (!usb->devhdl)
 376                 return SR_ERR;
 377
 378         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 379                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 380         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 381         libusb_reset_device(usb->devhdl);
 382         libusb_close(usb->devhdl);
 383         usb->devhdl = NULL;
 384         sdi->status = SR_ST_INACTIVE;
 385
 386         return SR_OK;
 387 }
 388
 389 static int cleanup(void)
 390 {
 391         return std_dev_clear(di, NULL);
 392 }
 393
 394 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 395                 const struct sr_channel_group *cg)
 396 {
 397         struct dev_context *devc;
 398
 399         (void)cg;
 400
 401         switch (key) {
 402         case SR_CONF_SAMPLERATE:
 403                 if (sdi) {
 404                         devc = sdi->priv;
 405                         *data = g_variant_new_uint64(devc->cur_samplerate);
 406                         sr_spew("Returning samplerate: %" PRIu64 "Hz.",
 407                                 devc->cur_samplerate);
 408                 } else
 409                         return SR_ERR_ARG;
 410                 break;
 411         case SR_CONF_CAPTURE_RATIO:
 412                 if (sdi) {
 413                         devc = sdi->priv;
 414                         *data = g_variant_new_uint64(devc->capture_ratio);
 415                 } else
 416                         return SR_ERR_ARG;
 417                 break;
 418         case SR_CONF_VOLTAGE_THRESHOLD:
 419                 if (sdi) {
 420                         GVariant *range[2];
 421                         devc = sdi->priv;
 422                         range[0] = g_variant_new_double(devc->cur_threshold);
 423                         range[1] = g_variant_new_double(devc->cur_threshold);
 424                         *data = g_variant_new_tuple(range, 2);
 425                 } else
 426                         return SR_ERR_ARG;
 427                 break;
 428         default:
 429                 return SR_ERR_NA;
 430         }
 431
 432         return SR_OK;
 433 }
 434
 435 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 436                 const struct sr_channel_group *cg)
 437 {
 438         struct dev_context *devc;
 439         gdouble low, high;
 440
 441         (void)cg;
 442
 443         if (sdi->status != SR_ST_ACTIVE)
 444                 return SR_ERR_DEV_CLOSED;
 445
 446         if (!(devc = sdi->priv)) {
 447                 sr_err("%s: sdi->priv was NULL", __func__);
 448                 return SR_ERR_ARG;
 449         }
 450
 451         switch (key) {
 452         case SR_CONF_SAMPLERATE:
 453                 return zp_set_samplerate(devc, g_variant_get_uint64(data));
 454         case SR_CONF_LIMIT_SAMPLES:
 455                 return set_limit_samples(devc, g_variant_get_uint64(data));
 456         case SR_CONF_CAPTURE_RATIO:
 457                 return set_capture_ratio(devc, g_variant_get_uint64(data));
 458         case SR_CONF_VOLTAGE_THRESHOLD:
 459                 g_variant_get(data, "(dd)", &low, &high);
 460                 return set_voltage_threshold(devc, (low + high) / 2.0);
 461         default:
 462                 return SR_ERR_NA;
 463         }
 464
 465         return SR_OK;
 466 }
 467
 468 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 469                 const struct sr_channel_group *cg)
 470 {
 471         struct dev_context *devc;
 472         GVariant *gvar, *grange[2];
 473         GVariantBuilder gvb;
 474         double v;
 475         GVariant *range[2];
 476
 477         (void)cg;
 478
 479         switch (key) {
 480         case SR_CONF_DEVICE_OPTIONS:
 481                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 482                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 483                 break;
 484         case SR_CONF_SAMPLERATE:
 485                 devc = sdi->priv;
 486                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 487                 if (devc->prof->max_sampling_freq == 100) {
 488                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 489                                         samplerates_100, ARRAY_SIZE(samplerates_100),
 490                                         sizeof(uint64_t));
 491                 } else if (devc->prof->max_sampling_freq == 200) {
 492                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 493                                         samplerates_200, ARRAY_SIZE(samplerates_200),
 494                                         sizeof(uint64_t));
 495                 } else {
 496                         sr_err("Internal error: Unknown max. samplerate: %d.",
 497                                devc->prof->max_sampling_freq);
 498                         return SR_ERR_ARG;
 499                 }
 500                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 501                 *data = g_variant_builder_end(&gvb);
 502                 break;
 503         case SR_CONF_TRIGGER_MATCH:
 504                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 505                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 506                                 sizeof(int32_t));
 507                 break;
 508         case SR_CONF_VOLTAGE_THRESHOLD:
 509                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 510                 for (v = -6.0; v <= 6.0; v += 0.1) {
 511                         range[0] = g_variant_new_double(v);
 512                         range[1] = g_variant_new_double(v);
 513                         gvar = g_variant_new_tuple(range, 2);
 514                         g_variant_builder_add_value(&gvb, gvar);
 515                 }
 516                 *data = g_variant_builder_end(&gvb);
 517                 break;
 518         case SR_CONF_LIMIT_SAMPLES:
 519                 if (!sdi)
 520                         return SR_ERR_ARG;
 521                 devc = sdi->priv;
 522                 grange[0] = g_variant_new_uint64(0);
 523                 grange[1] = g_variant_new_uint64(devc->max_sample_depth);
 524                 *data = g_variant_new_tuple(grange, 2);
 525                 break;
 526         default:
 527                 return SR_ERR_NA;
 528         }
 529
 530         return SR_OK;
 531 }
 532
 533 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 534                 void *cb_data)
 535 {
 536         struct dev_context *devc;
 537         struct sr_usb_dev_inst *usb;
 538         struct sr_datafeed_packet packet;
 539         struct sr_datafeed_logic logic;
 540         unsigned int samples_read;
 541         int res;
 542         unsigned int packet_num, n;
 543         unsigned char *buf;
 544         unsigned int status;
 545         unsigned int stop_address;
 546         unsigned int now_address;
 547         unsigned int trigger_address;
 548         unsigned int trigger_offset;
 549         unsigned int triggerbar;
 550         unsigned int ramsize_trigger;
 551         unsigned int memory_size;
 552         unsigned int valid_samples;
 553         unsigned int discard;
 554         int trigger_now;
 555
 556         if (sdi->status != SR_ST_ACTIVE)
 557                 return SR_ERR_DEV_CLOSED;
 558
 559         if (!(devc = sdi->priv)) {
 560                 sr_err("%s: sdi->priv was NULL", __func__);
 561                 return SR_ERR_ARG;
 562         }
 563
 564         if (analyzer_add_triggers(sdi) != SR_OK) {
 565                 sr_err("Failed to configure triggers.");
 566                 return SR_ERR;
 567         }
 568
 569         usb = sdi->conn;
 570
 571         set_triggerbar(devc);
 572
 573         /* Push configured settings to device. */
 574         analyzer_configure(usb->devhdl);
 575
 576         analyzer_start(usb->devhdl);
 577         sr_info("Waiting for data.");
 578         analyzer_wait_data(usb->devhdl);
 579
 580         status = analyzer_read_status(usb->devhdl);
 581         stop_address = analyzer_get_stop_address(usb->devhdl);
 582         now_address = analyzer_get_now_address(usb->devhdl);
 583         trigger_address = analyzer_get_trigger_address(usb->devhdl);
 584
 585         triggerbar = analyzer_get_triggerbar_address();
 586         ramsize_trigger = analyzer_get_ramsize_trigger_address();
 587
 588         n = get_memory_size(devc->memory_size);
 589         memory_size = n / 4;
 590
 591         sr_info("Status = 0x%x.", status);
 592         sr_info("Stop address       = 0x%x.", stop_address);
 593         sr_info("Now address        = 0x%x.", now_address);
 594         sr_info("Trigger address    = 0x%x.", trigger_address);
 595         sr_info("Triggerbar address = 0x%x.", triggerbar);
 596         sr_info("Ramsize trigger    = 0x%x.", ramsize_trigger);
 597         sr_info("Memory size        = 0x%x.", memory_size);
 598
 599         /* Send header packet to the session bus. */
 600         std_session_send_df_header(cb_data, LOG_PREFIX);
 601
 602         /* Check for empty capture */
 603         if ((status & STATUS_READY) && !stop_address) {
 604                 packet.type = SR_DF_END;
 605                 sr_session_send(cb_data, &packet);
 606                 return SR_OK;
 607         }
 608
 609         if (!(buf = g_try_malloc(PACKET_SIZE))) {
 610                 sr_err("Packet buffer malloc failed.");
 611                 return SR_ERR_MALLOC;
 612         }
 613
 614         /* Check if the trigger is in the samples we are throwing away */
 615         trigger_now = now_address == trigger_address ||
 616                 ((now_address + 1) % memory_size) == trigger_address;
 617
 618         /*
 619          * STATUS_READY doesn't clear until now_address advances past
 620          * addr 0, but for our logic, clear it in that case
 621          */
 622         if (!now_address)
 623                 status &= ~STATUS_READY;
 624
 625         analyzer_read_start(usb->devhdl);
 626
 627         /* Calculate how much data to discard */
 628         discard = 0;
 629         if (status & STATUS_READY) {
 630                 /*
 631                  * We haven't wrapped around, we need to throw away data from
 632                  * our current position to the end of the buffer.
 633                  * Additionally, the first two samples captured are always
 634                  * bogus.
 635                  */
 636                 discard += memory_size - now_address + 2;
 637                 now_address = 2;
 638         }
 639
 640         /* If we have more samples than we need, discard them */
 641         valid_samples = (stop_address - now_address) % memory_size;
 642         if (valid_samples > ramsize_trigger + triggerbar) {
 643                 discard += valid_samples - (ramsize_trigger + triggerbar);
 644                 now_address += valid_samples - (ramsize_trigger + triggerbar);
 645         }
 646
 647         sr_info("Need to discard %d samples.", discard);
 648
 649         /* Calculate how far in the trigger is */
 650         if (trigger_now)
 651                 trigger_offset = 0;
 652         else
 653                 trigger_offset = (trigger_address - now_address) % memory_size;
 654
 655         /* Recalculate the number of samples available */
 656         valid_samples = (stop_address - now_address) % memory_size;
 657
 658         /* Send the incoming transfer to the session bus. */
 659         samples_read = 0;
 660         for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
 661                 unsigned int len;
 662                 unsigned int buf_offset;
 663
 664                 res = analyzer_read_data(usb->devhdl, buf, PACKET_SIZE);
 665                 sr_info("Tried to read %d bytes, actually read %d bytes.",
 666                         PACKET_SIZE, res);
 667
 668                 if (discard >= PACKET_SIZE / 4) {
 669                         discard -= PACKET_SIZE / 4;
 670                         continue;
 671                 }
 672
 673                 len = PACKET_SIZE - discard * 4;
 674                 buf_offset = discard * 4;
 675                 discard = 0;
 676
 677                 /* Check if we've read all the samples */
 678                 if (samples_read + len / 4 >= valid_samples)
 679                         len = (valid_samples - samples_read) * 4;
 680                 if (!len)
 681                         break;
 682
 683                 if (samples_read < trigger_offset &&
 684                     samples_read + len / 4 > trigger_offset) {
 685                         /* Send out samples remaining before trigger */
 686                         packet.type = SR_DF_LOGIC;
 687                         packet.payload = &logic;
 688                         logic.length = (trigger_offset - samples_read) * 4;
 689                         logic.unitsize = 4;
 690                         logic.data = buf + buf_offset;
 691                         sr_session_send(cb_data, &packet);
 692                         len -= logic.length;
 693                         samples_read += logic.length / 4;
 694                         buf_offset += logic.length;
 695                 }
 696
 697                 if (samples_read == trigger_offset) {
 698                         /* Send out trigger */
 699                         packet.type = SR_DF_TRIGGER;
 700                         packet.payload = NULL;
 701                         sr_session_send(cb_data, &packet);
 702                 }
 703
 704                 /* Send out data (or data after trigger) */
 705                 packet.type = SR_DF_LOGIC;
 706                 packet.payload = &logic;
 707                 logic.length = len;
 708                 logic.unitsize = 4;
 709                 logic.data = buf + buf_offset;
 710                 sr_session_send(cb_data, &packet);
 711                 samples_read += len / 4;
 712         }
 713         analyzer_read_stop(usb->devhdl);
 714         g_free(buf);
 715
 716         packet.type = SR_DF_END;
 717         sr_session_send(cb_data, &packet);
 718
 719         return SR_OK;
 720 }
 721
 722 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
 723 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 724 {
 725         struct dev_context *devc;
 726         struct sr_usb_dev_inst *usb;
 727         struct sr_datafeed_packet packet;
 728
 729         packet.type = SR_DF_END;
 730         sr_session_send(cb_data, &packet);
 731
 732         if (!(devc = sdi->priv)) {
 733                 sr_err("%s: sdi->priv was NULL", __func__);
 734                 return SR_ERR_BUG;
 735         }
 736
 737         usb = sdi->conn;
 738         analyzer_reset(usb->devhdl);
 739         /* TODO: Need to cancel and free any queued up transfers. */
 740
 741         return SR_OK;
 742 }
 743
 744 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info = {
 745         .name = "zeroplus-logic-cube",
 746         .longname = "ZEROPLUS Logic Cube LAP-C series",
 747         .api_version = 1,
 748         .init = init,
 749         .cleanup = cleanup,
 750         .scan = scan,
 751         .dev_list = dev_list,
 752         .dev_clear = NULL,
 753         .config_get = config_get,
 754         .config_set = config_set,
 755         .config_list = config_list,
 756         .dev_open = dev_open,
 757         .dev_close = dev_close,
 758         .dev_acquisition_start = dev_acquisition_start,
 759         .dev_acquisition_stop = dev_acquisition_stop,
 760         .priv = NULL,
 761 };