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 /* Create a new sigrok device instance for the indicated LWLA model.
  65  */
  66 static struct sr_dev_inst *dev_inst_new(const struct model_info *model)
  67 {
  68         struct sr_dev_inst *sdi;
  69         struct dev_context *devc;
  70         int i;
  71         char name[8];
  72
  73         /* Initialize private device context. */
  74         devc = g_malloc0(sizeof(struct dev_context));
  75         devc->model = model;
  76         devc->active_fpga_config = FPGA_NOCONF;
  77         devc->cfg_rle = TRUE;
  78         devc->samplerate = model->samplerates[0];
  79         devc->channel_mask = (UINT64_C(1) << model->num_channels) - 1;
  80
  81         /* Create sigrok device instance. */
  82         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  83         sdi->status = SR_ST_INACTIVE;
  84         sdi->vendor = g_strdup(VENDOR_NAME);
  85         sdi->model = g_strdup(model->name);
  86         sdi->priv = devc;
  87
  88         /* Generate list of logic channels. */
  89         for (i = 0; i < model->num_channels; i++) {
  90                 /* The LWLA series simply number channels from CH1 to CHxx. */
  91                 g_snprintf(name, sizeof(name), "CH%d", i + 1);
  92                 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, name);
  93         }
  94
  95         return sdi;
  96 }
  97
  98 /* Create a new device instance for a libusb device if it is a SysClk LWLA
  99  * device and also matches the connection specification.
 100  */
 101 static struct sr_dev_inst *dev_inst_new_matching(GSList *conn_matches,
 102                                                  libusb_device *dev)
 103 {
 104         GSList *node;
 105         struct sr_usb_dev_inst *usb;
 106         const struct model_info *model;
 107         struct sr_dev_inst *sdi;
 108         struct libusb_device_descriptor des;
 109         int bus, address, ret;
 110         unsigned int vid, pid;
 111
 112         bus = libusb_get_bus_number(dev);
 113         address = libusb_get_device_address(dev);
 114
 115         for (node = conn_matches; node != NULL; node = node->next) {
 116                 usb = node->data;
 117                 if (usb && usb->bus == bus && usb->address == address)
 118                         break; /* found */
 119         }
 120         if (conn_matches && !node)
 121                 return NULL; /* no match */
 122
 123         ret = libusb_get_device_descriptor(dev, &des);
 124         if (ret != 0) {
 125                 sr_err("Failed to get USB device descriptor: %s.",
 126                         libusb_error_name(ret));
 127                 return NULL;
 128         }
 129         vid = des.idVendor;
 130         pid = des.idProduct;
 131
 132         /* Create sigrok device instance. */
 133         if (vid == USB_VID_SYSCLK && pid == USB_PID_LWLA1016) {
 134                 model = &lwla1016_info;
 135         } else if (vid == USB_VID_SYSCLK && pid == USB_PID_LWLA1034) {
 136                 model = &lwla1034_info;
 137         } else {
 138                 if (conn_matches)
 139                         sr_warn("USB device %d.%d (%04x:%04x) is not a"
 140                                 " SysClk LWLA.", bus, address, vid, pid);
 141                 return NULL;
 142         }
 143         sdi = dev_inst_new(model);
 144
 145         sdi->inst_type = SR_INST_USB;
 146         sdi->conn = sr_usb_dev_inst_new(bus, address, NULL);
 147
 148         return sdi;
 149 }
 150
 151 /* Scan for SysClk LWLA devices and create a device instance for each one.
 152  */
 153 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 154 {
 155         GSList *conn_devices, *devices, *node;
 156         struct drv_context *drvc;
 157         struct sr_dev_inst *sdi;
 158         struct sr_config *src;
 159         const char *conn;
 160         libusb_device **devlist;
 161         ssize_t num_devs, i;
 162
 163         drvc = di->context;
 164         conn = NULL;
 165         conn_devices = NULL;
 166         devices = NULL;
 167
 168         for (node = options; node != NULL; node = node->next) {
 169                 src = node->data;
 170                 if (src->key == SR_CONF_CONN) {
 171                         conn = g_variant_get_string(src->data, NULL);
 172                         break;
 173                 }
 174         }
 175         if (conn) {
 176                 /* Find devices matching the connection specification. */
 177                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 178         }
 179
 180         /* List all libusb devices. */
 181         num_devs = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 182         if (num_devs < 0) {
 183                 sr_err("Failed to list USB devices: %s.",
 184                         libusb_error_name(num_devs));
 185                 g_slist_free_full(conn_devices,
 186                         (GDestroyNotify)&sr_usb_dev_inst_free);
 187                 return NULL;
 188         }
 189
 190         /* Scan the USB device list for matching LWLA devices. */
 191         for (i = 0; i < num_devs; i++) {
 192                 sdi = dev_inst_new_matching(conn_devices, devlist[i]);
 193                 if (!sdi)
 194                         continue; /* no match */
 195
 196                 /* Register device instance with driver. */
 197                 devices = g_slist_append(devices, sdi);
 198         }
 199
 200         libusb_free_device_list(devlist, 1);
 201         g_slist_free_full(conn_devices, (GDestroyNotify)&sr_usb_dev_inst_free);
 202
 203         return std_scan_complete(di, devices);
 204 }
 205
 206 /* Drain any pending data from the USB transfer buffers on the device.
 207  * This may be necessary e.g. after a crash or generally to clean up after
 208  * an abnormal condition.
 209  */
 210 static int drain_usb(struct sr_usb_dev_inst *usb, unsigned int endpoint)
 211 {
 212         int drained, xfer_len, ret;
 213         unsigned char buf[512];
 214         const unsigned int drain_timeout_ms = 10;
 215
 216         drained = 0;
 217         do {
 218                 xfer_len = 0;
 219                 ret = libusb_bulk_transfer(usb->devhdl, endpoint,
 220                                            buf, sizeof(buf), &xfer_len,
 221                                            drain_timeout_ms);
 222                 drained += xfer_len;
 223         } while (ret == LIBUSB_SUCCESS && xfer_len != 0);
 224
 225         if (ret != LIBUSB_SUCCESS && ret != LIBUSB_ERROR_TIMEOUT) {
 226                 sr_err("Failed to drain USB endpoint %u: %s.",
 227                        endpoint & (LIBUSB_ENDPOINT_IN - 1),
 228                        libusb_error_name(ret));
 229                 return SR_ERR;
 230         }
 231         if (drained > 0) {
 232                 sr_warn("Drained %d bytes from USB endpoint %u.",
 233                         drained, endpoint & (LIBUSB_ENDPOINT_IN - 1));
 234         }
 235
 236         return SR_OK;
 237 }
 238
 239 /* Open and initialize device.
 240  */
 241 static int dev_open(struct sr_dev_inst *sdi)
 242 {
 243         struct drv_context *drvc;
 244         struct dev_context *devc;
 245         struct sr_usb_dev_inst *usb;
 246         int i, ret;
 247
 248         drvc = sdi->driver->context;
 249         devc = sdi->priv;
 250         usb = sdi->conn;
 251
 252         /* Try the whole shebang three times, fingers crossed. */
 253         for (i = 0; i < 3; i++) {
 254                 ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
 255                 if (ret != SR_OK)
 256                         return ret;
 257
 258                 ret = libusb_set_configuration(usb->devhdl, USB_CONFIG);
 259                 if (ret != LIBUSB_SUCCESS) {
 260                         sr_err("Failed to set USB configuration: %s.",
 261                                 libusb_error_name(ret));
 262                         sr_usb_close(usb);
 263                         return SR_ERR;
 264                 }
 265
 266                 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 267                 if (ret != LIBUSB_SUCCESS) {
 268                         sr_err("Failed to claim interface: %s.",
 269                                 libusb_error_name(ret));
 270                         sr_usb_close(usb);
 271                         return SR_ERR;
 272                 }
 273
 274                 ret = drain_usb(usb, EP_REPLY);
 275                 if (ret != SR_OK) {
 276                         sr_usb_close(usb);
 277                         return ret;
 278                 }
 279                 /* This delay appears to be necessary for reliable operation. */
 280                 g_usleep(30 * 1000);
 281
 282                 devc->active_fpga_config = FPGA_NOCONF;
 283                 devc->short_transfer_quirk = FALSE;
 284                 devc->state = STATE_IDLE;
 285
 286                 ret = (*devc->model->apply_fpga_config)(sdi);
 287
 288                 if (ret == SR_OK)
 289                         ret = (*devc->model->device_init_check)(sdi);
 290                 if (ret == SR_OK)
 291                         break;
 292
 293                 /* Rinse and repeat. */
 294                 sr_usb_close(usb);
 295         }
 296
 297         if (ret == SR_OK && devc->short_transfer_quirk)
 298                 sr_warn("Short transfer quirk detected! "
 299                         "Memory reads will be slow.");
 300         return ret;
 301 }
 302
 303 /* Shutdown and close device. */
 304 static int dev_close(struct sr_dev_inst *sdi)
 305 {
 306         struct dev_context *devc;
 307         struct sr_usb_dev_inst *usb;
 308         int ret;
 309
 310         devc = sdi->priv;
 311         usb = sdi->conn;
 312
 313         if (devc->acquisition) {
 314                 sr_err("Cannot close device during acquisition!");
 315                 /* Request stop, leak handle, and prepare for the worst. */
 316                 devc->cancel_requested = TRUE;
 317                 return SR_ERR_BUG;
 318         }
 319
 320         /* Download of the shutdown bitstream, if any. */
 321         ret = (*devc->model->apply_fpga_config)(sdi);
 322         if (ret != SR_OK)
 323                 sr_warn("Unable to shut down device.");
 324
 325         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 326
 327         sr_usb_close(usb);
 328
 329         return SR_OK;
 330 }
 331
 332 /* Check whether the device options contain a specific key.
 333  * Also match against get/set/list bits if specified.
 334  */
 335 static int has_devopt(const struct model_info *model, uint32_t key)
 336 {
 337         unsigned int i;
 338
 339         for (i = 0; i < model->num_devopts; i++) {
 340                 if ((model->devopts[i] & (SR_CONF_MASK | key)) == key)
 341                         return TRUE;
 342         }
 343
 344         return FALSE;
 345 }
 346
 347 /* Read device configuration setting.
 348  */
 349 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 350                       const struct sr_channel_group *cg)
 351 {
 352         struct dev_context *devc;
 353         unsigned int idx;
 354
 355         (void)cg;
 356
 357         if (!sdi)
 358                 return SR_ERR_ARG;
 359
 360         devc = sdi->priv;
 361
 362         if (!has_devopt(devc->model, key | SR_CONF_GET))
 363                 return SR_ERR_NA;
 364
 365         switch (key) {
 366         case SR_CONF_SAMPLERATE:
 367                 *data = g_variant_new_uint64(devc->samplerate);
 368                 break;
 369         case SR_CONF_LIMIT_MSEC:
 370                 *data = g_variant_new_uint64(devc->limit_msec);
 371                 break;
 372         case SR_CONF_LIMIT_SAMPLES:
 373                 *data = g_variant_new_uint64(devc->limit_samples);
 374                 break;
 375         case SR_CONF_RLE:
 376                 *data = g_variant_new_boolean(devc->cfg_rle);
 377                 break;
 378         case SR_CONF_EXTERNAL_CLOCK:
 379                 *data = g_variant_new_boolean(devc->cfg_clock_source
 380                                                 == CLOCK_EXT_CLK);
 381                 break;
 382         case SR_CONF_CLOCK_EDGE:
 383                 idx = devc->cfg_clock_edge;
 384                 if (idx >= ARRAY_SIZE(signal_edge_names))
 385                         return SR_ERR_BUG;
 386                 *data = g_variant_new_string(signal_edge_names[idx]);
 387                 break;
 388         case SR_CONF_TRIGGER_SOURCE:
 389                 idx = devc->cfg_trigger_source;
 390                 if (idx >= ARRAY_SIZE(trigger_source_names))
 391                         return SR_ERR_BUG;
 392                 *data = g_variant_new_string(trigger_source_names[idx]);
 393                 break;
 394         case SR_CONF_TRIGGER_SLOPE:
 395                 idx = devc->cfg_trigger_slope;
 396                 if (idx >= ARRAY_SIZE(signal_edge_names))
 397                         return SR_ERR_BUG;
 398                 *data = g_variant_new_string(signal_edge_names[idx]);
 399                 break;
 400         default:
 401                 /* Must not happen for a key listed in devopts. */
 402                 return SR_ERR_BUG;
 403         }
 404
 405         return SR_OK;
 406 }
 407
 408 /* Helper for mapping a string-typed configuration value to an index
 409  * within a table of possible values.
 410  */
 411 static int lookup_index(GVariant *value, const char *const *table, int len)
 412 {
 413         const char *entry;
 414         int i;
 415
 416         entry = g_variant_get_string(value, NULL);
 417         if (!entry)
 418                 return -1;
 419
 420         /* Linear search is fine for very small tables. */
 421         for (i = 0; i < len; i++) {
 422                 if (strcmp(entry, table[i]) == 0)
 423                         return i;
 424         }
 425
 426         return -1;
 427 }
 428
 429 /* Write device configuration setting.
 430  */
 431 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 432                       const struct sr_channel_group *cg)
 433 {
 434         uint64_t value;
 435         struct dev_context *devc;
 436         int idx;
 437
 438         (void)cg;
 439
 440         if (!sdi)
 441                 return SR_ERR_ARG;
 442
 443         devc = sdi->priv;
 444
 445         if (!has_devopt(devc->model, key | SR_CONF_SET))
 446                 return SR_ERR_NA;
 447
 448         switch (key) {
 449         case SR_CONF_SAMPLERATE:
 450                 value = g_variant_get_uint64(data);
 451                 if (value < devc->model->samplerates[devc->model->num_samplerates - 1]
 452                                 || value > devc->model->samplerates[0])
 453                         return SR_ERR_SAMPLERATE;
 454                 devc->samplerate = value;
 455                 break;
 456         case SR_CONF_LIMIT_MSEC:
 457                 value = g_variant_get_uint64(data);
 458                 if (value > MAX_LIMIT_MSEC)
 459                         return SR_ERR_ARG;
 460                 devc->limit_msec = value;
 461                 break;
 462         case SR_CONF_LIMIT_SAMPLES:
 463                 value = g_variant_get_uint64(data);
 464                 if (value > MAX_LIMIT_SAMPLES)
 465                         return SR_ERR_ARG;
 466                 devc->limit_samples = value;
 467                 break;
 468         case SR_CONF_RLE:
 469                 devc->cfg_rle = g_variant_get_boolean(data);
 470                 break;
 471         case SR_CONF_EXTERNAL_CLOCK:
 472                 devc->cfg_clock_source = (g_variant_get_boolean(data))
 473                         ? CLOCK_EXT_CLK : CLOCK_INTERNAL;
 474                 break;
 475         case SR_CONF_CLOCK_EDGE:
 476                 idx = lookup_index(data, signal_edge_names,
 477                                    ARRAY_SIZE(signal_edge_names));
 478                 if (idx < 0)
 479                         return SR_ERR_ARG;
 480                 devc->cfg_clock_edge = idx;
 481                 break;
 482         case SR_CONF_TRIGGER_SOURCE:
 483                 idx = lookup_index(data, trigger_source_names,
 484                                    ARRAY_SIZE(trigger_source_names));
 485                 if (idx < 0)
 486                         return SR_ERR_ARG;
 487                 devc->cfg_trigger_source = idx;
 488                 break;
 489         case SR_CONF_TRIGGER_SLOPE:
 490                 idx = lookup_index(data, signal_edge_names,
 491                                    ARRAY_SIZE(signal_edge_names));
 492                 if (idx < 0)
 493                         return SR_ERR_ARG;
 494                 devc->cfg_trigger_slope = idx;
 495                 break;
 496         default:
 497                 /* Must not happen for a key listed in devopts. */
 498                 return SR_ERR_BUG;
 499         }
 500
 501         return SR_OK;
 502 }
 503
 504 /* Apply channel configuration change.
 505  */
 506 static int config_channel_set(const struct sr_dev_inst *sdi,
 507                               struct sr_channel *ch, unsigned int changes)
 508 {
 509         uint64_t channel_bit;
 510         struct dev_context *devc;
 511
 512         if (!sdi)
 513                 return SR_ERR_ARG;
 514
 515         devc = sdi->priv;
 516
 517         if (ch->index < 0 || ch->index >= devc->model->num_channels) {
 518                 sr_err("Channel index %d out of range.", ch->index);
 519                 return SR_ERR_BUG;
 520         }
 521
 522         if ((changes & SR_CHANNEL_SET_ENABLED) != 0) {
 523                 channel_bit = UINT64_C(1) << ch->index;
 524
 525                 /* Enable or disable logic input for this channel. */
 526                 if (ch->enabled)
 527                         devc->channel_mask |= channel_bit;
 528                 else
 529                         devc->channel_mask &= ~channel_bit;
 530         }
 531
 532         return SR_OK;
 533 }
 534
 535 /* Derive trigger masks from the session's trigger configuration.
 536  */
 537 static int prepare_trigger_masks(const struct sr_dev_inst *sdi)
 538 {
 539         uint64_t trigger_mask, trigger_values, trigger_edge_mask;
 540         uint64_t level_bit, type_bit;
 541         struct dev_context *devc;
 542         struct sr_trigger *trigger;
 543         struct sr_trigger_stage *stage;
 544         struct sr_trigger_match *match;
 545         const GSList *node;
 546         int idx;
 547         enum sr_trigger_matches trg;
 548
 549         devc = sdi->priv;
 550
 551         trigger = sr_session_trigger_get(sdi->session);
 552         if (!trigger || !trigger->stages)
 553                 return SR_OK;
 554
 555         if (trigger->stages->next) {
 556                 sr_err("This device only supports 1 trigger stage.");
 557                 return SR_ERR_ARG;
 558         }
 559         stage = trigger->stages->data;
 560
 561         trigger_mask = 0;
 562         trigger_values = 0;
 563         trigger_edge_mask = 0;
 564
 565         for (node = stage->matches; node; node = node->next) {
 566                 match = node->data;
 567
 568                 if (!match->channel->enabled)
 569                         continue; /* Ignore disabled channel. */
 570
 571                 idx = match->channel->index;
 572                 trg = match->match;
 573
 574                 if (idx < 0 || idx >= devc->model->num_channels) {
 575                         sr_err("Channel index %d out of range.", idx);
 576                         return SR_ERR_BUG; /* Should not happen. */
 577                 }
 578                 if (trg != SR_TRIGGER_ZERO
 579                                 && trg != SR_TRIGGER_ONE
 580                                 && trg != SR_TRIGGER_RISING
 581                                 && trg != SR_TRIGGER_FALLING) {
 582                         sr_err("Unsupported trigger match for CH%d.", idx + 1);
 583                         return SR_ERR_ARG;
 584                 }
 585                 level_bit = (trg == SR_TRIGGER_ONE
 586                         || trg == SR_TRIGGER_RISING) ? 1 : 0;
 587                 type_bit = (trg == SR_TRIGGER_RISING
 588                         || trg == SR_TRIGGER_FALLING) ? 1 : 0;
 589
 590                 trigger_mask |= UINT64_C(1) << idx;
 591                 trigger_values |= level_bit << idx;
 592                 trigger_edge_mask |= type_bit << idx;
 593         }
 594         devc->trigger_mask = trigger_mask;
 595         devc->trigger_values = trigger_values;
 596         devc->trigger_edge_mask = trigger_edge_mask;
 597
 598         return SR_OK;
 599 }
 600
 601 /* Apply current device configuration to the hardware.
 602  */
 603 static int config_commit(const struct sr_dev_inst *sdi)
 604 {
 605         struct dev_context *devc;
 606         int ret;
 607
 608         devc = sdi->priv;
 609
 610         if (devc->acquisition) {
 611                 sr_err("Acquisition still in progress?");
 612                 return SR_ERR;
 613         }
 614
 615         ret = prepare_trigger_masks(sdi);
 616         if (ret != SR_OK)
 617                 return ret;
 618
 619         ret = (*devc->model->apply_fpga_config)(sdi);
 620         if (ret != SR_OK) {
 621                 sr_err("Failed to apply FPGA configuration.");
 622                 return ret;
 623         }
 624
 625         return SR_OK;
 626 }
 627
 628 /* List available choices for a configuration setting.
 629  */
 630 static int config_list(uint32_t key, GVariant **data,
 631                        const struct sr_dev_inst *sdi,
 632                        const struct sr_channel_group *cg)
 633 {
 634         struct dev_context *devc;
 635         GVariant *gvar;
 636         GVariantBuilder gvb;
 637
 638         (void)cg;
 639
 640         if (key == SR_CONF_SCAN_OPTIONS) {
 641                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 642                         scanopts, ARRAY_SIZE(scanopts), sizeof(scanopts[0]));
 643                 return SR_OK;
 644         }
 645         if (!sdi) {
 646                 if (key != SR_CONF_DEVICE_OPTIONS)
 647                         return SR_ERR_ARG;
 648
 649                 /* List driver capabilities. */
 650                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 651                         drvopts, ARRAY_SIZE(drvopts), sizeof(drvopts[0]));
 652                 return SR_OK;
 653         }
 654
 655         devc = sdi->priv;
 656
 657         /* List the model's device options. */
 658         if (key == SR_CONF_DEVICE_OPTIONS) {
 659                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 660                         devc->model->devopts, devc->model->num_devopts,
 661                         sizeof(devc->model->devopts[0]));
 662                 return SR_OK;
 663         }
 664
 665         if (!has_devopt(devc->model, key | SR_CONF_LIST))
 666                 return SR_ERR_NA;
 667
 668         switch (key) {
 669         case SR_CONF_SAMPLERATE:
 670                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_VARDICT);
 671                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 672                         devc->model->samplerates, devc->model->num_samplerates,
 673                         sizeof(devc->model->samplerates[0]));
 674                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 675                 *data = g_variant_builder_end(&gvb);
 676                 break;
 677         case SR_CONF_TRIGGER_MATCH:
 678                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 679                         trigger_matches, ARRAY_SIZE(trigger_matches),
 680                         sizeof(trigger_matches[0]));
 681                 break;
 682         case SR_CONF_TRIGGER_SOURCE:
 683                 *data = g_variant_new_strv(trigger_source_names,
 684                         ARRAY_SIZE(trigger_source_names));
 685                 break;
 686         case SR_CONF_TRIGGER_SLOPE:
 687         case SR_CONF_CLOCK_EDGE:
 688                 *data = g_variant_new_strv(signal_edge_names,
 689                         ARRAY_SIZE(signal_edge_names));
 690                 break;
 691         default:
 692                 /* Must not happen for a key listed in devopts. */
 693                 return SR_ERR_BUG;
 694         }
 695
 696         return SR_OK;
 697 }
 698
 699 /* Set up the device hardware to begin capturing samples as soon as the
 700  * configured trigger conditions are met, or immediately if no triggers
 701  * are configured.
 702  */
 703 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 704 {
 705         return lwla_start_acquisition(sdi);
 706 }
 707
 708 /* Request that a running capture operation be stopped.
 709  */
 710 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 711 {
 712         struct dev_context *devc;
 713
 714         devc = sdi->priv;
 715
 716         if (devc->state != STATE_IDLE && !devc->cancel_requested) {
 717                 devc->cancel_requested = TRUE;
 718                 sr_dbg("Requesting cancel.");
 719         }
 720
 721         return SR_OK;
 722 }
 723
 724 /* SysClk LWLA driver descriptor.
 725  */
 726 static struct sr_dev_driver sysclk_lwla_driver_info = {
 727         .name = "sysclk-lwla",
 728         .longname = "SysClk LWLA series",
 729         .api_version = 1,
 730         .init = std_init,
 731         .cleanup = std_cleanup,
 732         .scan = scan,
 733         .dev_list = std_dev_list,
 734         .dev_clear = std_dev_clear,
 735         .config_get = config_get,
 736         .config_set = config_set,
 737         .config_channel_set = config_channel_set,
 738         .config_commit = config_commit,
 739         .config_list = config_list,
 740         .dev_open = dev_open,
 741         .dev_close = dev_close,
 742         .dev_acquisition_start = dev_acquisition_start,
 743         .dev_acquisition_stop = dev_acquisition_stop,
 744         .context = NULL,
 745 };
 746 SR_REGISTER_DEV_DRIVER(sysclk_lwla_driver_info);