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 /* Destroy the private device context.
 207  */
 208 static void clear_dev_context(void *priv)
 209 {
 210         struct dev_context *devc;
 211
 212         devc = priv;
 213
 214         if (devc->acquisition) {
 215                 sr_err("Cannot clear device context during acquisition!");
 216                 return; /* Leak and pray. */
 217         }
 218         sr_dbg("Device context cleared.");
 219
 220         g_free(devc);
 221 }
 222
 223 /* Destroy all device instances.
 224  */
 225 static int dev_clear(const struct sr_dev_driver *di)
 226 {
 227         return std_dev_clear(di, &clear_dev_context);
 228 }
 229
 230 /* Drain any pending data from the USB transfer buffers on the device.
 231  * This may be necessary e.g. after a crash or generally to clean up after
 232  * an abnormal condition.
 233  */
 234 static int drain_usb(struct sr_usb_dev_inst *usb, unsigned int endpoint)
 235 {
 236         int drained, xfer_len, ret;
 237         unsigned char buf[512];
 238         const unsigned int drain_timeout_ms = 10;
 239
 240         drained = 0;
 241         do {
 242                 xfer_len = 0;
 243                 ret = libusb_bulk_transfer(usb->devhdl, endpoint,
 244                                            buf, sizeof(buf), &xfer_len,
 245                                            drain_timeout_ms);
 246                 drained += xfer_len;
 247         } while (ret == LIBUSB_SUCCESS && xfer_len != 0);
 248
 249         if (ret != LIBUSB_SUCCESS && ret != LIBUSB_ERROR_TIMEOUT) {
 250                 sr_err("Failed to drain USB endpoint %u: %s.",
 251                        endpoint & (LIBUSB_ENDPOINT_IN - 1),
 252                        libusb_error_name(ret));
 253                 return SR_ERR;
 254         }
 255         if (drained > 0) {
 256                 sr_warn("Drained %d bytes from USB endpoint %u.",
 257                         drained, endpoint & (LIBUSB_ENDPOINT_IN - 1));
 258         }
 259
 260         return SR_OK;
 261 }
 262
 263 /* Open and initialize device.
 264  */
 265 static int dev_open(struct sr_dev_inst *sdi)
 266 {
 267         struct drv_context *drvc;
 268         struct dev_context *devc;
 269         struct sr_usb_dev_inst *usb;
 270         int i, ret;
 271
 272         drvc = sdi->driver->context;
 273         devc = sdi->priv;
 274         usb = sdi->conn;
 275
 276         /* Try the whole shebang three times, fingers crossed. */
 277         for (i = 0; i < 3; i++) {
 278                 ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
 279                 if (ret != SR_OK)
 280                         return ret;
 281
 282                 ret = libusb_set_configuration(usb->devhdl, USB_CONFIG);
 283                 if (ret != LIBUSB_SUCCESS) {
 284                         sr_err("Failed to set USB configuration: %s.",
 285                                 libusb_error_name(ret));
 286                         sr_usb_close(usb);
 287                         return SR_ERR;
 288                 }
 289
 290                 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 291                 if (ret != LIBUSB_SUCCESS) {
 292                         sr_err("Failed to claim interface: %s.",
 293                                 libusb_error_name(ret));
 294                         sr_usb_close(usb);
 295                         return SR_ERR;
 296                 }
 297
 298                 ret = drain_usb(usb, EP_REPLY);
 299                 if (ret != SR_OK) {
 300                         sr_usb_close(usb);
 301                         return ret;
 302                 }
 303                 /* This delay appears to be necessary for reliable operation. */
 304                 g_usleep(30 * 1000);
 305
 306                 devc->active_fpga_config = FPGA_NOCONF;
 307                 devc->short_transfer_quirk = FALSE;
 308                 devc->state = STATE_IDLE;
 309
 310                 ret = (*devc->model->apply_fpga_config)(sdi);
 311
 312                 if (ret == SR_OK)
 313                         ret = (*devc->model->device_init_check)(sdi);
 314                 if (ret == SR_OK)
 315                         break;
 316
 317                 /* Rinse and repeat. */
 318                 sr_usb_close(usb);
 319         }
 320
 321         if (ret == SR_OK && devc->short_transfer_quirk)
 322                 sr_warn("Short transfer quirk detected! "
 323                         "Memory reads will be slow.");
 324         return ret;
 325 }
 326
 327 /* Shutdown and close device. */
 328 static int dev_close(struct sr_dev_inst *sdi)
 329 {
 330         struct dev_context *devc;
 331         struct sr_usb_dev_inst *usb;
 332         int ret;
 333
 334         devc = sdi->priv;
 335         usb = sdi->conn;
 336
 337         if (devc->acquisition) {
 338                 sr_err("Cannot close device during acquisition!");
 339                 /* Request stop, leak handle, and prepare for the worst. */
 340                 devc->cancel_requested = TRUE;
 341                 return SR_ERR_BUG;
 342         }
 343
 344         /* Download of the shutdown bitstream, if any. */
 345         ret = (*devc->model->apply_fpga_config)(sdi);
 346         if (ret != SR_OK)
 347                 sr_warn("Unable to shut down device.");
 348
 349         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 350
 351         sr_usb_close(usb);
 352
 353         return SR_OK;
 354 }
 355
 356 /* Check whether the device options contain a specific key.
 357  * Also match against get/set/list bits if specified.
 358  */
 359 static int has_devopt(const struct model_info *model, uint32_t key)
 360 {
 361         unsigned int i;
 362
 363         for (i = 0; i < model->num_devopts; i++) {
 364                 if ((model->devopts[i] & (SR_CONF_MASK | key)) == key)
 365                         return TRUE;
 366         }
 367
 368         return FALSE;
 369 }
 370
 371 /* Read device configuration setting.
 372  */
 373 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 374                       const struct sr_channel_group *cg)
 375 {
 376         struct dev_context *devc;
 377         unsigned int idx;
 378
 379         (void)cg;
 380
 381         if (!sdi)
 382                 return SR_ERR_ARG;
 383
 384         devc = sdi->priv;
 385
 386         if (!has_devopt(devc->model, key | SR_CONF_GET))
 387                 return SR_ERR_NA;
 388
 389         switch (key) {
 390         case SR_CONF_SAMPLERATE:
 391                 *data = g_variant_new_uint64(devc->samplerate);
 392                 break;
 393         case SR_CONF_LIMIT_MSEC:
 394                 *data = g_variant_new_uint64(devc->limit_msec);
 395                 break;
 396         case SR_CONF_LIMIT_SAMPLES:
 397                 *data = g_variant_new_uint64(devc->limit_samples);
 398                 break;
 399         case SR_CONF_RLE:
 400                 *data = g_variant_new_boolean(devc->cfg_rle);
 401                 break;
 402         case SR_CONF_EXTERNAL_CLOCK:
 403                 *data = g_variant_new_boolean(devc->cfg_clock_source
 404                                                 == CLOCK_EXT_CLK);
 405                 break;
 406         case SR_CONF_CLOCK_EDGE:
 407                 idx = devc->cfg_clock_edge;
 408                 if (idx >= ARRAY_SIZE(signal_edge_names))
 409                         return SR_ERR_BUG;
 410                 *data = g_variant_new_string(signal_edge_names[idx]);
 411                 break;
 412         case SR_CONF_TRIGGER_SOURCE:
 413                 idx = devc->cfg_trigger_source;
 414                 if (idx >= ARRAY_SIZE(trigger_source_names))
 415                         return SR_ERR_BUG;
 416                 *data = g_variant_new_string(trigger_source_names[idx]);
 417                 break;
 418         case SR_CONF_TRIGGER_SLOPE:
 419                 idx = devc->cfg_trigger_slope;
 420                 if (idx >= ARRAY_SIZE(signal_edge_names))
 421                         return SR_ERR_BUG;
 422                 *data = g_variant_new_string(signal_edge_names[idx]);
 423                 break;
 424         default:
 425                 /* Must not happen for a key listed in devopts. */
 426                 return SR_ERR_BUG;
 427         }
 428
 429         return SR_OK;
 430 }
 431
 432 /* Helper for mapping a string-typed configuration value to an index
 433  * within a table of possible values.
 434  */
 435 static int lookup_index(GVariant *value, const char *const *table, int len)
 436 {
 437         const char *entry;
 438         int i;
 439
 440         entry = g_variant_get_string(value, NULL);
 441         if (!entry)
 442                 return -1;
 443
 444         /* Linear search is fine for very small tables. */
 445         for (i = 0; i < len; i++) {
 446                 if (strcmp(entry, table[i]) == 0)
 447                         return i;
 448         }
 449
 450         return -1;
 451 }
 452
 453 /* Write device configuration setting.
 454  */
 455 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 456                       const struct sr_channel_group *cg)
 457 {
 458         uint64_t value;
 459         struct dev_context *devc;
 460         int idx;
 461
 462         (void)cg;
 463
 464         if (!sdi)
 465                 return SR_ERR_ARG;
 466
 467         devc = sdi->priv;
 468
 469         if (!has_devopt(devc->model, key | SR_CONF_SET))
 470                 return SR_ERR_NA;
 471
 472         switch (key) {
 473         case SR_CONF_SAMPLERATE:
 474                 value = g_variant_get_uint64(data);
 475                 if (value < devc->model->samplerates[devc->model->num_samplerates - 1]
 476                                 || value > devc->model->samplerates[0])
 477                         return SR_ERR_SAMPLERATE;
 478                 devc->samplerate = value;
 479                 break;
 480         case SR_CONF_LIMIT_MSEC:
 481                 value = g_variant_get_uint64(data);
 482                 if (value > MAX_LIMIT_MSEC)
 483                         return SR_ERR_ARG;
 484                 devc->limit_msec = value;
 485                 break;
 486         case SR_CONF_LIMIT_SAMPLES:
 487                 value = g_variant_get_uint64(data);
 488                 if (value > MAX_LIMIT_SAMPLES)
 489                         return SR_ERR_ARG;
 490                 devc->limit_samples = value;
 491                 break;
 492         case SR_CONF_RLE:
 493                 devc->cfg_rle = g_variant_get_boolean(data);
 494                 break;
 495         case SR_CONF_EXTERNAL_CLOCK:
 496                 devc->cfg_clock_source = (g_variant_get_boolean(data))
 497                         ? CLOCK_EXT_CLK : CLOCK_INTERNAL;
 498                 break;
 499         case SR_CONF_CLOCK_EDGE:
 500                 idx = lookup_index(data, signal_edge_names,
 501                                    ARRAY_SIZE(signal_edge_names));
 502                 if (idx < 0)
 503                         return SR_ERR_ARG;
 504                 devc->cfg_clock_edge = idx;
 505                 break;
 506         case SR_CONF_TRIGGER_SOURCE:
 507                 idx = lookup_index(data, trigger_source_names,
 508                                    ARRAY_SIZE(trigger_source_names));
 509                 if (idx < 0)
 510                         return SR_ERR_ARG;
 511                 devc->cfg_trigger_source = idx;
 512                 break;
 513         case SR_CONF_TRIGGER_SLOPE:
 514                 idx = lookup_index(data, signal_edge_names,
 515                                    ARRAY_SIZE(signal_edge_names));
 516                 if (idx < 0)
 517                         return SR_ERR_ARG;
 518                 devc->cfg_trigger_slope = idx;
 519                 break;
 520         default:
 521                 /* Must not happen for a key listed in devopts. */
 522                 return SR_ERR_BUG;
 523         }
 524
 525         return SR_OK;
 526 }
 527
 528 /* Apply channel configuration change.
 529  */
 530 static int config_channel_set(const struct sr_dev_inst *sdi,
 531                               struct sr_channel *ch, unsigned int changes)
 532 {
 533         uint64_t channel_bit;
 534         struct dev_context *devc;
 535
 536         if (!sdi)
 537                 return SR_ERR_ARG;
 538
 539         devc = sdi->priv;
 540
 541         if (ch->index < 0 || ch->index >= devc->model->num_channels) {
 542                 sr_err("Channel index %d out of range.", ch->index);
 543                 return SR_ERR_BUG;
 544         }
 545
 546         if ((changes & SR_CHANNEL_SET_ENABLED) != 0) {
 547                 channel_bit = UINT64_C(1) << ch->index;
 548
 549                 /* Enable or disable logic input for this channel. */
 550                 if (ch->enabled)
 551                         devc->channel_mask |= channel_bit;
 552                 else
 553                         devc->channel_mask &= ~channel_bit;
 554         }
 555
 556         return SR_OK;
 557 }
 558
 559 /* Derive trigger masks from the session's trigger configuration.
 560  */
 561 static int prepare_trigger_masks(const struct sr_dev_inst *sdi)
 562 {
 563         uint64_t trigger_mask, trigger_values, trigger_edge_mask;
 564         uint64_t level_bit, type_bit;
 565         struct dev_context *devc;
 566         struct sr_trigger *trigger;
 567         struct sr_trigger_stage *stage;
 568         struct sr_trigger_match *match;
 569         const GSList *node;
 570         int idx;
 571         enum sr_trigger_matches trg;
 572
 573         devc = sdi->priv;
 574
 575         trigger = sr_session_trigger_get(sdi->session);
 576         if (!trigger || !trigger->stages)
 577                 return SR_OK;
 578
 579         if (trigger->stages->next) {
 580                 sr_err("This device only supports 1 trigger stage.");
 581                 return SR_ERR_ARG;
 582         }
 583         stage = trigger->stages->data;
 584
 585         trigger_mask = 0;
 586         trigger_values = 0;
 587         trigger_edge_mask = 0;
 588
 589         for (node = stage->matches; node; node = node->next) {
 590                 match = node->data;
 591
 592                 if (!match->channel->enabled)
 593                         continue; /* Ignore disabled channel. */
 594
 595                 idx = match->channel->index;
 596                 trg = match->match;
 597
 598                 if (idx < 0 || idx >= devc->model->num_channels) {
 599                         sr_err("Channel index %d out of range.", idx);
 600                         return SR_ERR_BUG; /* Should not happen. */
 601                 }
 602                 if (trg != SR_TRIGGER_ZERO
 603                                 && trg != SR_TRIGGER_ONE
 604                                 && trg != SR_TRIGGER_RISING
 605                                 && trg != SR_TRIGGER_FALLING) {
 606                         sr_err("Unsupported trigger match for CH%d.", idx + 1);
 607                         return SR_ERR_ARG;
 608                 }
 609                 level_bit = (trg == SR_TRIGGER_ONE
 610                         || trg == SR_TRIGGER_RISING) ? 1 : 0;
 611                 type_bit = (trg == SR_TRIGGER_RISING
 612                         || trg == SR_TRIGGER_FALLING) ? 1 : 0;
 613
 614                 trigger_mask |= UINT64_C(1) << idx;
 615                 trigger_values |= level_bit << idx;
 616                 trigger_edge_mask |= type_bit << idx;
 617         }
 618         devc->trigger_mask = trigger_mask;
 619         devc->trigger_values = trigger_values;
 620         devc->trigger_edge_mask = trigger_edge_mask;
 621
 622         return SR_OK;
 623 }
 624
 625 /* Apply current device configuration to the hardware.
 626  */
 627 static int config_commit(const struct sr_dev_inst *sdi)
 628 {
 629         struct dev_context *devc;
 630         int ret;
 631
 632         devc = sdi->priv;
 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), sizeof(scanopts[0]));
 667                 return SR_OK;
 668         }
 669         if (!sdi) {
 670                 if (key != SR_CONF_DEVICE_OPTIONS)
 671                         return SR_ERR_ARG;
 672
 673                 /* List driver capabilities. */
 674                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 675                         drvopts, ARRAY_SIZE(drvopts), sizeof(drvopts[0]));
 676                 return SR_OK;
 677         }
 678
 679         devc = sdi->priv;
 680
 681         /* List the model's device options. */
 682         if (key == SR_CONF_DEVICE_OPTIONS) {
 683                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 684                         devc->model->devopts, devc->model->num_devopts,
 685                         sizeof(devc->model->devopts[0]));
 686                 return SR_OK;
 687         }
 688
 689         if (!has_devopt(devc->model, key | SR_CONF_LIST))
 690                 return SR_ERR_NA;
 691
 692         switch (key) {
 693         case SR_CONF_SAMPLERATE:
 694                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_VARDICT);
 695                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 696                         devc->model->samplerates, devc->model->num_samplerates,
 697                         sizeof(devc->model->samplerates[0]));
 698                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 699                 *data = g_variant_builder_end(&gvb);
 700                 break;
 701         case SR_CONF_TRIGGER_MATCH:
 702                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 703                         trigger_matches, ARRAY_SIZE(trigger_matches),
 704                         sizeof(trigger_matches[0]));
 705                 break;
 706         case SR_CONF_TRIGGER_SOURCE:
 707                 *data = g_variant_new_strv(trigger_source_names,
 708                         ARRAY_SIZE(trigger_source_names));
 709                 break;
 710         case SR_CONF_TRIGGER_SLOPE:
 711         case SR_CONF_CLOCK_EDGE:
 712                 *data = g_variant_new_strv(signal_edge_names,
 713                         ARRAY_SIZE(signal_edge_names));
 714                 break;
 715         default:
 716                 /* Must not happen for a key listed in devopts. */
 717                 return SR_ERR_BUG;
 718         }
 719
 720         return SR_OK;
 721 }
 722
 723 /* Set up the device hardware to begin capturing samples as soon as the
 724  * configured trigger conditions are met, or immediately if no triggers
 725  * are configured.
 726  */
 727 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 728 {
 729         return lwla_start_acquisition(sdi);
 730 }
 731
 732 /* Request that a running capture operation be stopped.
 733  */
 734 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 735 {
 736         struct dev_context *devc;
 737
 738         devc = sdi->priv;
 739
 740         if (devc->state != STATE_IDLE && !devc->cancel_requested) {
 741                 devc->cancel_requested = TRUE;
 742                 sr_dbg("Requesting cancel.");
 743         }
 744
 745         return SR_OK;
 746 }
 747
 748 /* SysClk LWLA driver descriptor.
 749  */
 750 static struct sr_dev_driver sysclk_lwla_driver_info = {
 751         .name = "sysclk-lwla",
 752         .longname = "SysClk LWLA series",
 753         .api_version = 1,
 754         .init = std_init,
 755         .cleanup = std_cleanup,
 756         .scan = scan,
 757         .dev_list = std_dev_list,
 758         .dev_clear = dev_clear,
 759         .config_get = config_get,
 760         .config_set = config_set,
 761         .config_channel_set = config_channel_set,
 762         .config_commit = config_commit,
 763         .config_list = config_list,
 764         .dev_open = dev_open,
 765         .dev_close = dev_close,
 766         .dev_acquisition_start = dev_acquisition_start,
 767         .dev_acquisition_stop = dev_acquisition_stop,
 768         .context = NULL,
 769 };
 770 SR_REGISTER_DEV_DRIVER(sysclk_lwla_driver_info);