src/hardware/sysclk-lwla/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 Daniel Elstner <daniel.kitta@gmail.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <glib.h>
  22 #include <libusb.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <libsigrok/libsigrok.h>
  26 #include "libsigrok-internal.h"
  27 #include "protocol.h"
  28
  29 /* Supported device scan options.
  30  */
  31 static const uint32_t scanopts[] = {
  32         SR_CONF_CONN,
  33 };
  34
  35 /* Driver capabilities.
  36  */
  37 static const uint32_t drvopts[] = {
  38         SR_CONF_LOGIC_ANALYZER,
  39 };
  40
  41 /* Supported trigger match conditions.
  42  */
  43 static const int32_t trigger_matches[] = {
  44         SR_TRIGGER_ZERO,
  45         SR_TRIGGER_ONE,
  46         SR_TRIGGER_RISING,
  47         SR_TRIGGER_FALLING,
  48 };
  49
  50 /* Names assigned to available trigger sources.
  51  */
  52 static const char *const trigger_source_names[] = {
  53         [TRIGGER_CHANNELS] = "CH",
  54         [TRIGGER_EXT_TRG] = "TRG",
  55 };
  56
  57 /* Names assigned to available edge slope choices.
  58  */
  59 static const char *const signal_edge_names[] = {
  60         [EDGE_POSITIVE] = "r",
  61         [EDGE_NEGATIVE] = "f",
  62 };
  63
  64 /* Initialize the SysClk LWLA driver.
  65  */
  66 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  67 {
  68         return std_init(sr_ctx, di, LOG_PREFIX);
  69 }
  70
  71 /* Create a new sigrok device instance for the indicated LWLA model.
  72  */
  73 static struct sr_dev_inst *dev_inst_new(const struct model_info *model)
  74 {
  75         struct sr_dev_inst *sdi;
  76         struct dev_context *devc;
  77         int i;
  78         char name[8];
  79
  80         /* Initialize private device context. */
  81         devc = g_malloc0(sizeof(struct dev_context));
  82         devc->model = model;
  83         devc->active_fpga_config = FPGA_NOCONF;
  84         devc->cfg_rle = TRUE;
  85         devc->samplerate = model->samplerates[0];
  86         devc->channel_mask = (UINT64_C(1) << model->num_channels) - 1;
  87
  88         /* Create sigrok device instance. */
  89         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  90         sdi->status = SR_ST_INACTIVE;
  91         sdi->vendor = g_strdup(VENDOR_NAME);
  92         sdi->model = g_strdup(model->name);
  93         sdi->priv = devc;
  94
  95         /* Generate list of logic channels. */
  96         for (i = 0; i < model->num_channels; i++) {
  97                 /* The LWLA series simply number channels from CH1 to CHxx. */
  98                 g_snprintf(name, sizeof(name), "CH%d", i + 1);
  99                 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, name);
 100         }
 101
 102         return sdi;
 103 }
 104
 105 /* Create a new device instance for a libusb device if it is a SysClk LWLA
 106  * device and also matches the connection specification.
 107  */
 108 static struct sr_dev_inst *dev_inst_new_matching(GSList *conn_matches,
 109                                                  libusb_device *dev)
 110 {
 111         GSList *node;
 112         struct sr_usb_dev_inst *usb;
 113         const struct model_info *model;
 114         struct sr_dev_inst *sdi;
 115         struct libusb_device_descriptor des;
 116         int bus, address;
 117         unsigned int vid, pid;
 118         int ret;
 119
 120         bus = libusb_get_bus_number(dev);
 121         address = libusb_get_device_address(dev);
 122
 123         for (node = conn_matches; node != NULL; node = node->next) {
 124                 usb = node->data;
 125                 if (usb && usb->bus == bus && usb->address == address)
 126                         break; /* found */
 127         }
 128         if (conn_matches && !node)
 129                 return NULL; /* no match */
 130
 131         ret = libusb_get_device_descriptor(dev, &des);
 132         if (ret != 0) {
 133                 sr_err("Failed to get USB device descriptor: %s.",
 134                         libusb_error_name(ret));
 135                 return NULL;
 136         }
 137         vid = des.idVendor;
 138         pid = des.idProduct;
 139
 140         /* Create sigrok device instance. */
 141         if (vid == USB_VID_SYSCLK && pid == USB_PID_LWLA1016) {
 142                 model = &lwla1016_info;
 143         } else if (vid == USB_VID_SYSCLK && pid == USB_PID_LWLA1034) {
 144                 model = &lwla1034_info;
 145         } else {
 146                 if (conn_matches)
 147                         sr_warn("USB device %d.%d (%04x:%04x) is not a"
 148                                 " SysClk LWLA.", bus, address, vid, pid);
 149                 return NULL;
 150         }
 151         sdi = dev_inst_new(model);
 152
 153         sdi->inst_type = SR_INST_USB;
 154         sdi->conn = sr_usb_dev_inst_new(bus, address, NULL);
 155
 156         return sdi;
 157 }
 158
 159 /* Scan for SysClk LWLA devices and create a device instance for each one.
 160  */
 161 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 162 {
 163         GSList *conn_devices, *devices, *node;
 164         struct drv_context *drvc;
 165         struct sr_dev_inst *sdi;
 166         struct sr_config *src;
 167         const char *conn;
 168         libusb_device **devlist;
 169         ssize_t num_devs, i;
 170
 171         drvc = di->context;
 172         conn = NULL;
 173         conn_devices = NULL;
 174         devices = NULL;
 175
 176         for (node = options; node != NULL; node = node->next) {
 177                 src = node->data;
 178                 if (src->key == SR_CONF_CONN) {
 179                         conn = g_variant_get_string(src->data, NULL);
 180                         break;
 181                 }
 182         }
 183         if (conn) {
 184                 /* Find devices matching the connection specification. */
 185                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 186         }
 187
 188         /* List all libusb devices. */
 189         num_devs = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 190         if (num_devs < 0) {
 191                 sr_err("Failed to list USB devices: %s.",
 192                         libusb_error_name(num_devs));
 193                 g_slist_free_full(conn_devices,
 194                         (GDestroyNotify)&sr_usb_dev_inst_free);
 195                 return NULL;
 196         }
 197
 198         /* Scan the USB device list for matching LWLA devices. */
 199         for (i = 0; i < num_devs; i++) {
 200                 sdi = dev_inst_new_matching(conn_devices, devlist[i]);
 201                 if (!sdi)
 202                         continue; /* no match */
 203
 204                 /* Register device instance with driver. */
 205                 sdi->driver = di;
 206                 drvc->instances = g_slist_append(drvc->instances, sdi);
 207                 devices = g_slist_append(devices, sdi);
 208         }
 209
 210         libusb_free_device_list(devlist, 1);
 211         g_slist_free_full(conn_devices, (GDestroyNotify)&sr_usb_dev_inst_free);
 212
 213         return devices;
 214 }
 215
 216 /* Return the list of devices found during scan.
 217  */
 218 static GSList *dev_list(const struct sr_dev_driver *di)
 219 {
 220         struct drv_context *drvc;
 221
 222         drvc = di->context;
 223
 224         return drvc->instances;
 225 }
 226
 227 /* Destroy the private device context.
 228  */
 229 static void clear_dev_context(void *priv)
 230 {
 231         struct dev_context *devc;
 232
 233         devc = priv;
 234
 235         if (devc->acquisition) {
 236                 sr_err("Cannot clear device context during acquisition!");
 237                 return; /* leak and pray */
 238         }
 239         sr_dbg("Device context cleared.");
 240
 241         g_free(devc);
 242 }
 243
 244 /* Destroy all device instances.
 245  */
 246 static int dev_clear(const struct sr_dev_driver *di)
 247 {
 248         return std_dev_clear(di, &clear_dev_context);
 249 }
 250
 251 /* Open and initialize device.
 252  */
 253 static int dev_open(struct sr_dev_inst *sdi)
 254 {
 255         struct drv_context *drvc;
 256         struct dev_context *devc;
 257         struct sr_usb_dev_inst *usb;
 258         int ret;
 259
 260         drvc = sdi->driver->context;
 261         devc = sdi->priv;
 262         usb = sdi->conn;
 263
 264         if (!drvc) {
 265                 sr_err("Driver was not initialized.");
 266                 return SR_ERR;
 267         }
 268         if (sdi->status != SR_ST_INACTIVE) {
 269                 sr_err("Device already open.");
 270                 return SR_ERR;
 271         }
 272
 273         ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
 274         if (ret != SR_OK)
 275                 return ret;
 276
 277         ret = libusb_set_configuration(usb->devhdl, USB_CONFIG);
 278         if (ret != 0) {
 279                 sr_err("Failed to set USB configuration: %s.",
 280                         libusb_error_name(ret));
 281                 sr_usb_close(usb);
 282                 return SR_ERR;
 283         }
 284
 285         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 286         if (ret < 0) {
 287                 sr_err("Failed to claim interface: %s.",
 288                         libusb_error_name(ret));
 289                 sr_usb_close(usb);
 290                 return SR_ERR;
 291         }
 292
 293         sdi->status = SR_ST_ACTIVE;
 294
 295         devc->active_fpga_config = FPGA_NOCONF;
 296         devc->state = STATE_IDLE;
 297
 298         ret = (*devc->model->apply_fpga_config)(sdi);
 299
 300         if (ret == SR_OK)
 301                 ret = (*devc->model->device_init_check)(sdi);
 302
 303         if (ret != SR_OK) {
 304                 sdi->status = SR_ST_INACTIVE;
 305                 sr_usb_close(usb);
 306         }
 307         return ret;
 308 }
 309
 310 /* Shutdown and close device.
 311  */
 312 static int dev_close(struct sr_dev_inst *sdi)
 313 {
 314         struct drv_context *drvc;
 315         struct dev_context *devc;
 316         struct sr_usb_dev_inst *usb;
 317         int ret;
 318
 319         drvc = sdi->driver->context;
 320         devc = sdi->priv;
 321         usb = sdi->conn;
 322
 323         if (!drvc) {
 324                 sr_err("Driver was not initialized.");
 325                 return SR_ERR;
 326         }
 327         if (sdi->status == SR_ST_INACTIVE) {
 328                 sr_dbg("Device already closed.");
 329                 return SR_OK;
 330         }
 331         if (devc->acquisition) {
 332                 sr_err("Cannot close device during acquisition!");
 333                 /* Request stop, leak handle, and prepare for the worst. */
 334                 devc->cancel_requested = TRUE;
 335                 return SR_ERR_BUG;
 336         }
 337
 338         sdi->status = SR_ST_INACTIVE;
 339
 340         /* Download of the shutdown bitstream, if any. */
 341         ret = (*devc->model->apply_fpga_config)(sdi);
 342         if (ret != SR_OK)
 343                 sr_warn("Unable to shut down device.");
 344
 345         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 346         sr_usb_close(usb);
 347
 348         return ret;
 349 }
 350
 351 /* Check whether the device options contain a specific key.
 352  * Also match against get/set/list bits if specified.
 353  */
 354 static int has_devopt(const struct model_info *model, uint32_t key)
 355 {
 356         unsigned int i;
 357
 358         for (i = 0; i < model->num_devopts; i++) {
 359                 if ((model->devopts[i] & (SR_CONF_MASK | key)) == key)
 360                         return TRUE;
 361         }
 362         return FALSE;
 363 }
 364
 365 /* Read device configuration setting.
 366  */
 367 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 368                       const struct sr_channel_group *cg)
 369 {
 370         struct dev_context *devc;
 371         unsigned int idx;
 372
 373         (void)cg;
 374
 375         if (!sdi)
 376                 return SR_ERR_ARG;
 377
 378         devc = sdi->priv;
 379
 380         if (!has_devopt(devc->model, key | SR_CONF_GET))
 381                 return SR_ERR_NA;
 382
 383         switch (key) {
 384         case SR_CONF_SAMPLERATE:
 385                 *data = g_variant_new_uint64(devc->samplerate);
 386                 break;
 387         case SR_CONF_LIMIT_MSEC:
 388                 *data = g_variant_new_uint64(devc->limit_msec);
 389                 break;
 390         case SR_CONF_LIMIT_SAMPLES:
 391                 *data = g_variant_new_uint64(devc->limit_samples);
 392                 break;
 393         case SR_CONF_RLE:
 394                 *data = g_variant_new_boolean(devc->cfg_rle);
 395                 break;
 396         case SR_CONF_EXTERNAL_CLOCK:
 397                 *data = g_variant_new_boolean(devc->cfg_clock_source
 398                                                 == CLOCK_EXT_CLK);
 399                 break;
 400         case SR_CONF_CLOCK_EDGE:
 401                 idx = devc->cfg_clock_edge;
 402                 if (idx >= ARRAY_SIZE(signal_edge_names))
 403                         return SR_ERR_BUG;
 404                 *data = g_variant_new_string(signal_edge_names[idx]);
 405                 break;
 406         case SR_CONF_TRIGGER_SOURCE:
 407                 idx = devc->cfg_trigger_source;
 408                 if (idx >= ARRAY_SIZE(trigger_source_names))
 409                         return SR_ERR_BUG;
 410                 *data = g_variant_new_string(trigger_source_names[idx]);
 411                 break;
 412         case SR_CONF_TRIGGER_SLOPE:
 413                 idx = devc->cfg_trigger_slope;
 414                 if (idx >= ARRAY_SIZE(signal_edge_names))
 415                         return SR_ERR_BUG;
 416                 *data = g_variant_new_string(signal_edge_names[idx]);
 417                 break;
 418         default:
 419                 /* Must not happen for a key listed in devopts. */
 420                 return SR_ERR_BUG;
 421         }
 422
 423         return SR_OK;
 424 }
 425
 426 /* Helper for mapping a string-typed configuration value to an index
 427  * within a table of possible values.
 428  */
 429 static int lookup_index(GVariant *value, const char *const *table, int len)
 430 {
 431         const char *entry;
 432         int i;
 433
 434         entry = g_variant_get_string(value, NULL);
 435         if (!entry)
 436                 return -1;
 437
 438         /* Linear search is fine for very small tables. */
 439         for (i = 0; i < len; ++i) {
 440                 if (strcmp(entry, table[i]) == 0)
 441                         return i;
 442         }
 443         return -1;
 444 }
 445
 446 /* Write device configuration setting.
 447  */
 448 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 449                       const struct sr_channel_group *cg)
 450 {
 451         uint64_t value;
 452         struct dev_context *devc;
 453         int idx;
 454
 455         (void)cg;
 456
 457         if (!sdi)
 458                 return SR_ERR_ARG;
 459
 460         devc = sdi->priv;
 461
 462         if (!has_devopt(devc->model, key | SR_CONF_SET))
 463                 return SR_ERR_NA;
 464
 465         switch (key) {
 466         case SR_CONF_SAMPLERATE:
 467                 value = g_variant_get_uint64(data);
 468                 if (value < devc->model->samplerates[devc->model->num_samplerates - 1]
 469                                 || value > devc->model->samplerates[0])
 470                         return SR_ERR_SAMPLERATE;
 471                 devc->samplerate = value;
 472                 break;
 473         case SR_CONF_LIMIT_MSEC:
 474                 value = g_variant_get_uint64(data);
 475                 if (value > MAX_LIMIT_MSEC)
 476                         return SR_ERR_ARG;
 477                 devc->limit_msec = value;
 478                 break;
 479         case SR_CONF_LIMIT_SAMPLES:
 480                 value = g_variant_get_uint64(data);
 481                 if (value > MAX_LIMIT_SAMPLES)
 482                         return SR_ERR_ARG;
 483                 devc->limit_samples = value;
 484                 break;
 485         case SR_CONF_RLE:
 486                 devc->cfg_rle = g_variant_get_boolean(data);
 487                 break;
 488         case SR_CONF_EXTERNAL_CLOCK:
 489                 devc->cfg_clock_source = (g_variant_get_boolean(data))
 490                         ? CLOCK_EXT_CLK : CLOCK_INTERNAL;
 491                 break;
 492         case SR_CONF_CLOCK_EDGE:
 493                 idx = lookup_index(data, signal_edge_names,
 494                                    ARRAY_SIZE(signal_edge_names));
 495                 if (idx < 0)
 496                         return SR_ERR_ARG;
 497                 devc->cfg_clock_edge = idx;
 498                 break;
 499         case SR_CONF_TRIGGER_SOURCE:
 500                 idx = lookup_index(data, trigger_source_names,
 501                                    ARRAY_SIZE(trigger_source_names));
 502                 if (idx < 0)
 503                         return SR_ERR_ARG;
 504                 devc->cfg_trigger_source = idx;
 505                 break;
 506         case SR_CONF_TRIGGER_SLOPE:
 507                 idx = lookup_index(data, signal_edge_names,
 508                                    ARRAY_SIZE(signal_edge_names));
 509                 if (idx < 0)
 510                         return SR_ERR_ARG;
 511                 devc->cfg_trigger_slope = idx;
 512                 break;
 513         default:
 514                 /* Must not happen for a key listed in devopts. */
 515                 return SR_ERR_BUG;
 516         }
 517
 518         return SR_OK;
 519 }
 520
 521 /* Apply channel configuration change.
 522  */
 523 static int config_channel_set(const struct sr_dev_inst *sdi,
 524                               struct sr_channel *ch, unsigned int changes)
 525 {
 526         uint64_t channel_bit;
 527         struct dev_context *devc;
 528
 529         if (!sdi)
 530                 return SR_ERR_ARG;
 531
 532         devc = sdi->priv;
 533
 534         if (ch->index < 0 || ch->index >= devc->model->num_channels) {
 535                 sr_err("Channel index %d out of range.", ch->index);
 536                 return SR_ERR_BUG;
 537         }
 538
 539         if ((changes & SR_CHANNEL_SET_ENABLED) != 0) {
 540                 channel_bit = UINT64_C(1) << ch->index;
 541
 542                 /* Enable or disable logic input for this channel. */
 543                 if (ch->enabled)
 544                         devc->channel_mask |= channel_bit;
 545                 else
 546                         devc->channel_mask &= ~channel_bit;
 547         }
 548
 549         return SR_OK;
 550 }
 551
 552 /* Derive trigger masks from the session's trigger configuration.
 553  */
 554 static int prepare_trigger_masks(const struct sr_dev_inst *sdi)
 555 {
 556         uint64_t trigger_mask;
 557         uint64_t trigger_values;
 558         uint64_t trigger_edge_mask;
 559         uint64_t channel_bit;
 560         struct dev_context *devc;
 561         struct sr_trigger *trigger;
 562         struct sr_trigger_stage *stage;
 563         struct sr_trigger_match *match;
 564         const GSList *node;
 565         int idx;
 566
 567         devc = sdi->priv;
 568
 569         trigger = sr_session_trigger_get(sdi->session);
 570         if (!trigger || !trigger->stages)
 571                 return SR_OK;
 572
 573         if (trigger->stages->next) {
 574                 sr_err("This device only supports 1 trigger stage.");
 575                 return SR_ERR_ARG;
 576         }
 577         stage = trigger->stages->data;
 578
 579         trigger_mask = 0;
 580         trigger_values = 0;
 581         trigger_edge_mask = 0;
 582
 583         for (node = stage->matches; node; node = node->next) {
 584                 match = node->data;
 585
 586                 if (!match->channel->enabled)
 587                         continue; /* ignore disabled channel */
 588
 589                 idx = match->channel->index;
 590
 591                 if (idx < 0 || idx >= devc->model->num_channels) {
 592                         sr_err("Channel index %d out of range.", idx);
 593                         return SR_ERR_BUG; /* should not happen */
 594                 }
 595                 channel_bit = UINT64_C(1) << idx;
 596                 trigger_mask |= channel_bit;
 597
 598                 switch (match->match) {
 599                 case SR_TRIGGER_ZERO:
 600                         break;
 601                 case SR_TRIGGER_ONE:
 602                         trigger_values |= channel_bit;
 603                         break;
 604                 case SR_TRIGGER_RISING:
 605                         trigger_values |= channel_bit;
 606                         /* Fall through for edge mask. */
 607                 case SR_TRIGGER_FALLING:
 608                         trigger_edge_mask |= channel_bit;
 609                         break;
 610                 default:
 611                         sr_err("Unsupported trigger match for CH%d.", idx + 1);
 612                         return SR_ERR_ARG;
 613                 }
 614         }
 615         devc->trigger_mask = trigger_mask;
 616         devc->trigger_values = trigger_values;
 617         devc->trigger_edge_mask = trigger_edge_mask;
 618
 619         return SR_OK;
 620 }
 621
 622 /* Apply current device configuration to the hardware.
 623  */
 624 static int config_commit(const struct sr_dev_inst *sdi)
 625 {
 626         struct dev_context *devc;
 627         int ret;
 628
 629         devc = sdi->priv;
 630
 631         if (sdi->status != SR_ST_ACTIVE)
 632                 return SR_ERR_DEV_CLOSED;
 633
 634         if (devc->acquisition) {
 635                 sr_err("Acquisition still in progress?");
 636                 return SR_ERR;
 637         }
 638
 639         ret = prepare_trigger_masks(sdi);
 640         if (ret != SR_OK)
 641                 return ret;
 642
 643         ret = (*devc->model->apply_fpga_config)(sdi);
 644         if (ret != SR_OK) {
 645                 sr_err("Failed to apply FPGA configuration.");
 646                 return ret;
 647         }
 648
 649         return SR_OK;
 650 }
 651
 652 /* List available choices for a configuration setting.
 653  */
 654 static int config_list(uint32_t key, GVariant **data,
 655                        const struct sr_dev_inst *sdi,
 656                        const struct sr_channel_group *cg)
 657 {
 658         struct dev_context *devc;
 659         GVariant *gvar;
 660         GVariantBuilder gvb;
 661
 662         (void)cg;
 663
 664         if (key == SR_CONF_SCAN_OPTIONS) {
 665                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 666                                                   scanopts, ARRAY_SIZE(scanopts),
 667                                                   sizeof(scanopts[0]));
 668                 return SR_OK;
 669         }
 670         if (!sdi) {
 671                 if (key != SR_CONF_DEVICE_OPTIONS)
 672                         return SR_ERR_ARG;
 673
 674                 /* List driver capabilities. */
 675                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 676                                                   drvopts, ARRAY_SIZE(drvopts),
 677                                                   sizeof(drvopts[0]));
 678                 return SR_OK;
 679         }
 680
 681         devc = sdi->priv;
 682
 683         /* List the model's device options. */
 684         if (key == SR_CONF_DEVICE_OPTIONS) {
 685                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 686                                                   devc->model->devopts,
 687                                                   devc->model->num_devopts,
 688                                                   sizeof(devc->model->devopts[0]));
 689                 return SR_OK;
 690         }
 691
 692         if (!has_devopt(devc->model, key | SR_CONF_LIST))
 693                 return SR_ERR_NA;
 694
 695         switch (key) {
 696         case SR_CONF_SAMPLERATE:
 697                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_VARDICT);
 698                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 699                                                  devc->model->samplerates,
 700                                                  devc->model->num_samplerates,
 701                                                  sizeof(devc->model->samplerates[0]));
 702                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 703                 *data = g_variant_builder_end(&gvb);
 704                 break;
 705         case SR_CONF_TRIGGER_MATCH:
 706                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 707                                                   trigger_matches,
 708                                                   ARRAY_SIZE(trigger_matches),
 709                                                   sizeof(trigger_matches[0]));
 710                 break;
 711         case SR_CONF_TRIGGER_SOURCE:
 712                 *data = g_variant_new_strv(trigger_source_names,
 713                                            ARRAY_SIZE(trigger_source_names));
 714                 break;
 715         case SR_CONF_TRIGGER_SLOPE:
 716         case SR_CONF_CLOCK_EDGE:
 717                 *data = g_variant_new_strv(signal_edge_names,
 718                                            ARRAY_SIZE(signal_edge_names));
 719                 break;
 720         default:
 721                 /* Must not happen for a key listed in devopts. */
 722                 return SR_ERR_BUG;
 723         }
 724
 725         return SR_OK;
 726 }
 727
 728 /* Set up the device hardware to begin capturing samples as soon as the
 729  * configured trigger conditions are met, or immediately if no triggers
 730  * are configured.
 731  */
 732 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 733 {
 734         (void)cb_data;
 735
 736         if (sdi->status != SR_ST_ACTIVE)
 737                 return SR_ERR_DEV_CLOSED;
 738
 739         sr_info("Starting acquisition.");
 740
 741         return lwla_start_acquisition(sdi);
 742 }
 743
 744 /* Request that a running capture operation be stopped.
 745  */
 746 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 747 {
 748         struct dev_context *devc;
 749
 750         (void)cb_data;
 751         devc = sdi->priv;
 752
 753         if (sdi->status != SR_ST_ACTIVE)
 754                 return SR_ERR_DEV_CLOSED;
 755
 756         if (devc->state != STATE_IDLE && !devc->cancel_requested) {
 757                 devc->cancel_requested = TRUE;
 758                 sr_dbg("Stopping acquisition.");
 759         }
 760         return SR_OK;
 761 }
 762
 763 /* SysClk LWLA driver descriptor.
 764  */
 765 SR_PRIV struct sr_dev_driver sysclk_lwla_driver_info = {
 766         .name = "sysclk-lwla",
 767         .longname = "SysClk LWLA series",
 768         .api_version = 1,
 769         .init = init,
 770         .cleanup = dev_clear,
 771         .scan = scan,
 772         .dev_list = dev_list,
 773         .dev_clear = dev_clear,
 774         .config_get = config_get,
 775         .config_set = config_set,
 776         .config_channel_set = config_channel_set,
 777         .config_commit = config_commit,
 778         .config_list = config_list,
 779         .dev_open = dev_open,
 780         .dev_close = dev_close,
 781         .dev_acquisition_start = dev_acquisition_start,
 782         .dev_acquisition_stop = dev_acquisition_stop,
 783         .context = NULL,
 784 };