src/hardware/openbench-logic-sniffer/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 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 <config.h>
  21 #include "protocol.h"
  22
  23 #define SERIALCOMM "115200/8n1"
  24
  25 static const uint32_t drvopts[] = {
  26         SR_CONF_LOGIC_ANALYZER,
  27 };
  28
  29 static const uint32_t scanopts[] = {
  30         SR_CONF_CONN,
  31         SR_CONF_SERIALCOMM,
  32 };
  33
  34 static const uint32_t devopts[] = {
  35         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  36         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  37         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  38         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  39         SR_CONF_EXTERNAL_CLOCK | SR_CONF_SET,
  40         SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  41         SR_CONF_SWAP | SR_CONF_SET,
  42         SR_CONF_RLE | SR_CONF_GET | SR_CONF_SET,
  43 };
  44
  45 static const int32_t trigger_matches[] = {
  46         SR_TRIGGER_ZERO,
  47         SR_TRIGGER_ONE,
  48 };
  49
  50 #define STR_PATTERN_NONE     "None"
  51 #define STR_PATTERN_EXTERNAL "External"
  52 #define STR_PATTERN_INTERNAL "Internal"
  53
  54 /* Supported methods of test pattern outputs */
  55 enum {
  56         /**
  57          * Capture pins 31:16 (unbuffered wing) output a test pattern
  58          * that can captured on pins 0:15.
  59          */
  60         PATTERN_EXTERNAL,
  61
  62         /** Route test pattern internally to capture buffer. */
  63         PATTERN_INTERNAL,
  64 };
  65
  66 static const char *patterns[] = {
  67         STR_PATTERN_NONE,
  68         STR_PATTERN_EXTERNAL,
  69         STR_PATTERN_INTERNAL,
  70 };
  71
  72 /* Channels are numbered 0-31 (on the PCB silkscreen). */
  73 SR_PRIV const char *ols_channel_names[] = {
  74         "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
  75         "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
  76         "24", "25", "26", "27", "28", "29", "30", "31",
  77 };
  78
  79 /* Default supported samplerates, can be overridden by device metadata. */
  80 static const uint64_t samplerates[] = {
  81         SR_HZ(10),
  82         SR_MHZ(200),
  83         SR_HZ(1),
  84 };
  85
  86 #define RESPONSE_DELAY_US (10 * 1000)
  87
  88 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  89 {
  90         struct sr_config *src;
  91         struct sr_dev_inst *sdi;
  92         struct sr_serial_dev_inst *serial;
  93         GSList *l;
  94         int ret;
  95         unsigned int i;
  96         const char *conn, *serialcomm;
  97         char buf[8];
  98
  99         conn = serialcomm = NULL;
 100         for (l = options; l; l = l->next) {
 101                 src = l->data;
 102                 switch (src->key) {
 103                 case SR_CONF_CONN:
 104                         conn = g_variant_get_string(src->data, NULL);
 105                         break;
 106                 case SR_CONF_SERIALCOMM:
 107                         serialcomm = g_variant_get_string(src->data, NULL);
 108                         break;
 109                 }
 110         }
 111         if (!conn)
 112                 return NULL;
 113
 114         if (!serialcomm)
 115                 serialcomm = SERIALCOMM;
 116
 117         serial = sr_serial_dev_inst_new(conn, serialcomm);
 118
 119         /* The discovery procedure is like this: first send the Reset
 120          * command (0x00) 5 times, since the device could be anywhere
 121          * in a 5-byte command. Then send the ID command (0x02).
 122          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 123          * have a match.
 124          */
 125         sr_info("Probing %s.", conn);
 126         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 127                 return NULL;
 128
 129         ret = SR_OK;
 130         for (i = 0; i < 5; i++) {
 131                 if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
 132                         sr_err("Port %s is not writable.", conn);
 133                         break;
 134                 }
 135         }
 136         if (ret != SR_OK) {
 137                 serial_close(serial);
 138                 sr_err("Could not use port %s. Quitting.", conn);
 139                 return NULL;
 140         }
 141         send_shortcommand(serial, CMD_ID);
 142
 143         g_usleep(RESPONSE_DELAY_US);
 144
 145         if (sp_input_waiting(serial->data) == 0) {
 146                 sr_dbg("Didn't get any reply.");
 147                 return NULL;
 148         }
 149
 150         ret = serial_read_blocking(serial, buf, 4, serial_timeout(serial, 4));
 151         if (ret != 4) {
 152                 sr_err("Invalid reply (expected 4 bytes, got %d).", ret);
 153                 return NULL;
 154         }
 155
 156         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4)) {
 157                 sr_err("Invalid reply (expected '1SLO' or '1ALS', got "
 158                        "'%c%c%c%c').", buf[0], buf[1], buf[2], buf[3]);
 159                 return NULL;
 160         }
 161
 162         /* Definitely using the OLS protocol, check if it supports
 163          * the metadata command.
 164          */
 165         send_shortcommand(serial, CMD_METADATA);
 166
 167         g_usleep(RESPONSE_DELAY_US);
 168
 169         if (sp_input_waiting(serial->data) != 0) {
 170                 /* Got metadata. */
 171                 sdi = get_metadata(serial);
 172         } else {
 173                 /* Not an OLS -- some other board that uses the sump protocol. */
 174                 sr_info("Device does not support metadata.");
 175                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 176                 sdi->status = SR_ST_INACTIVE;
 177                 sdi->vendor = g_strdup("Sump");
 178                 sdi->model = g_strdup("Logic Analyzer");
 179                 sdi->version = g_strdup("v1.0");
 180                 for (i = 0; i < ARRAY_SIZE(ols_channel_names); i++)
 181                         sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
 182                                         ols_channel_names[i]);
 183                 sdi->priv = ols_dev_new();
 184         }
 185         /* Configure samplerate and divider. */
 186         if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 187                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 188                                 DEFAULT_SAMPLERATE);
 189         sdi->inst_type = SR_INST_SERIAL;
 190         sdi->conn = serial;
 191
 192         serial_close(serial);
 193
 194         return std_scan_complete(di, g_slist_append(NULL, sdi));
 195 }
 196
 197 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 198                 const struct sr_channel_group *cg)
 199 {
 200         struct dev_context *devc;
 201
 202         (void)cg;
 203
 204         if (!sdi)
 205                 return SR_ERR_ARG;
 206
 207         devc = sdi->priv;
 208         switch (key) {
 209         case SR_CONF_SAMPLERATE:
 210                 *data = g_variant_new_uint64(devc->cur_samplerate);
 211                 break;
 212         case SR_CONF_CAPTURE_RATIO:
 213                 *data = g_variant_new_uint64(devc->capture_ratio);
 214                 break;
 215         case SR_CONF_LIMIT_SAMPLES:
 216                 *data = g_variant_new_uint64(devc->limit_samples);
 217                 break;
 218         case SR_CONF_PATTERN_MODE:
 219                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 220                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 221                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 222                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 223                 else
 224                         *data = g_variant_new_string(STR_PATTERN_NONE);
 225                 break;
 226         case SR_CONF_RLE:
 227                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 228                 break;
 229         default:
 230                 return SR_ERR_NA;
 231         }
 232
 233         return SR_OK;
 234 }
 235
 236 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 237                 const struct sr_channel_group *cg)
 238 {
 239         struct dev_context *devc;
 240         uint16_t flag;
 241         uint64_t tmp_u64;
 242         int ret;
 243         const char *stropt;
 244
 245         (void)cg;
 246
 247         if (sdi->status != SR_ST_ACTIVE)
 248                 return SR_ERR_DEV_CLOSED;
 249
 250         devc = sdi->priv;
 251
 252         switch (key) {
 253         case SR_CONF_SAMPLERATE:
 254                 tmp_u64 = g_variant_get_uint64(data);
 255                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 256                         return SR_ERR_SAMPLERATE;
 257                 ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
 258                 break;
 259         case SR_CONF_LIMIT_SAMPLES:
 260                 tmp_u64 = g_variant_get_uint64(data);
 261                 if (tmp_u64 < MIN_NUM_SAMPLES)
 262                         return SR_ERR;
 263                 devc->limit_samples = tmp_u64;
 264                 ret = SR_OK;
 265                 break;
 266         case SR_CONF_CAPTURE_RATIO:
 267                 devc->capture_ratio = g_variant_get_uint64(data);
 268                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100)
 269                         ret = SR_ERR;
 270                 else
 271                         ret = SR_OK;
 272                 break;
 273         case SR_CONF_EXTERNAL_CLOCK:
 274                 if (g_variant_get_boolean(data)) {
 275                         sr_info("Enabling external clock.");
 276                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 277                 } else {
 278                         sr_info("Disabled external clock.");
 279                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 280                 }
 281                 ret = SR_OK;
 282                 break;
 283         case SR_CONF_PATTERN_MODE:
 284                 stropt = g_variant_get_string(data, NULL);
 285                 ret = SR_OK;
 286                 flag = 0xffff;
 287                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 288                         sr_info("Disabling test modes.");
 289                         flag = 0x0000;
 290                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 291                         sr_info("Enabling internal test mode.");
 292                         flag = FLAG_INTERNAL_TEST_MODE;
 293                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 294                         sr_info("Enabling external test mode.");
 295                         flag = FLAG_EXTERNAL_TEST_MODE;
 296                 } else {
 297                         ret = SR_ERR;
 298                 }
 299                 if (flag != 0xffff) {
 300                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 301                         devc->flag_reg |= flag;
 302                 }
 303                 break;
 304         case SR_CONF_SWAP:
 305                 if (g_variant_get_boolean(data)) {
 306                         sr_info("Enabling channel swapping.");
 307                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 308                 } else {
 309                         sr_info("Disabling channel swapping.");
 310                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 311                 }
 312                 ret = SR_OK;
 313                 break;
 314
 315         case SR_CONF_RLE:
 316                 if (g_variant_get_boolean(data)) {
 317                         sr_info("Enabling RLE.");
 318                         devc->flag_reg |= FLAG_RLE;
 319                 } else {
 320                         sr_info("Disabling RLE.");
 321                         devc->flag_reg &= ~FLAG_RLE;
 322                 }
 323                 ret = SR_OK;
 324                 break;
 325         default:
 326                 ret = SR_ERR_NA;
 327         }
 328
 329         return ret;
 330 }
 331
 332 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 333                 const struct sr_channel_group *cg)
 334 {
 335         struct dev_context *devc;
 336         GVariant *gvar, *grange[2];
 337         GVariantBuilder gvb;
 338         int num_ols_changrp, i;
 339
 340         (void)cg;
 341
 342         switch (key) {
 343         case SR_CONF_SCAN_OPTIONS:
 344                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 345                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 346                 break;
 347         case SR_CONF_DEVICE_OPTIONS:
 348                 if (!sdi)
 349                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 350                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 351                 else
 352                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 353                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 354                 break;
 355         case SR_CONF_SAMPLERATE:
 356                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 357                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 358                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 359                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 360                 *data = g_variant_builder_end(&gvb);
 361                 break;
 362         case SR_CONF_TRIGGER_MATCH:
 363                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 364                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 365                                 sizeof(int32_t));
 366                 break;
 367         case SR_CONF_PATTERN_MODE:
 368                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 369                 break;
 370         case SR_CONF_LIMIT_SAMPLES:
 371                 if (!sdi)
 372                         return SR_ERR_ARG;
 373                 devc = sdi->priv;
 374                 if (devc->flag_reg & FLAG_RLE)
 375                         return SR_ERR_NA;
 376                 if (devc->max_samples == 0)
 377                         /* Device didn't specify sample memory size in metadata. */
 378                         return SR_ERR_NA;
 379                 /*
 380                  * Channel groups are turned off if no channels in that group are
 381                  * enabled, making more room for samples for the enabled group.
 382                 */
 383                 ols_channel_mask(sdi);
 384                 num_ols_changrp = 0;
 385                 for (i = 0; i < 4; i++) {
 386                         if (devc->channel_mask & (0xff << (i * 8)))
 387                                 num_ols_changrp++;
 388                 }
 389                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 390                 if (num_ols_changrp)
 391                         grange[1] = g_variant_new_uint64(devc->max_samples / num_ols_changrp);
 392                 else
 393                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 394                 *data = g_variant_new_tuple(grange, 2);
 395                 break;
 396         default:
 397                 return SR_ERR_NA;
 398         }
 399
 400         return SR_OK;
 401 }
 402
 403 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 404 {
 405         struct dev_context *devc;
 406         struct sr_serial_dev_inst *serial;
 407         uint8_t cmd, arg[4];
 408
 409         devc = sdi->priv;
 410         serial = sdi->conn;
 411
 412         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 413         arg[0] = devc->trigger_mask[stage] & 0xff;
 414         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 415         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 416         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 417         if (send_longcommand(serial, cmd, arg) != SR_OK)
 418                 return SR_ERR;
 419
 420         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 421         arg[0] = devc->trigger_value[stage] & 0xff;
 422         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 423         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 424         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 425         if (send_longcommand(serial, cmd, arg) != SR_OK)
 426                 return SR_ERR;
 427
 428         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 429         arg[0] = arg[1] = arg[3] = 0x00;
 430         arg[2] = stage;
 431         if (stage == devc->num_stages)
 432                 /* Last stage, fire when this one matches. */
 433                 arg[3] |= TRIGGER_START;
 434         if (send_longcommand(serial, cmd, arg) != SR_OK)
 435                 return SR_ERR;
 436
 437         return SR_OK;
 438 }
 439
 440 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 441 {
 442         struct dev_context *devc;
 443         struct sr_serial_dev_inst *serial;
 444         uint16_t samplecount, readcount, delaycount;
 445         uint8_t ols_changrp_mask, arg[4];
 446         int num_ols_changrp;
 447         int ret, i;
 448
 449         if (sdi->status != SR_ST_ACTIVE)
 450                 return SR_ERR_DEV_CLOSED;
 451
 452         devc = sdi->priv;
 453         serial = sdi->conn;
 454
 455         ols_channel_mask(sdi);
 456
 457         num_ols_changrp = 0;
 458         ols_changrp_mask = 0;
 459         for (i = 0; i < 4; i++) {
 460                 if (devc->channel_mask & (0xff << (i * 8))) {
 461                         ols_changrp_mask |= (1 << i);
 462                         num_ols_changrp++;
 463                 }
 464         }
 465
 466         /*
 467          * Limit readcount to prevent reading past the end of the hardware
 468          * buffer.
 469          */
 470         samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
 471         readcount = samplecount / 4;
 472
 473         /* Rather read too many samples than too few. */
 474         if (samplecount % 4 != 0)
 475                 readcount++;
 476
 477         /* Basic triggers. */
 478         if (ols_convert_trigger(sdi) != SR_OK) {
 479                 sr_err("Failed to configure channels.");
 480                 return SR_ERR;
 481         }
 482         if (devc->num_stages > 0) {
 483                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 484                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 485                 for (i = 0; i <= devc->num_stages; i++) {
 486                         sr_dbg("Setting OLS stage %d trigger.", i);
 487                         if ((ret = set_trigger(sdi, i)) != SR_OK)
 488                                 return ret;
 489                 }
 490         } else {
 491                 /* No triggers configured, force trigger on first stage. */
 492                 sr_dbg("Forcing trigger at stage 0.");
 493                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 494                         return ret;
 495                 delaycount = readcount;
 496         }
 497
 498         /* Samplerate. */
 499         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 500                         devc->cur_samplerate, devc->cur_samplerate_divider);
 501         arg[0] = devc->cur_samplerate_divider & 0xff;
 502         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 503         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 504         arg[3] = 0x00;
 505         if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
 506                 return SR_ERR;
 507
 508         /* Send sample limit and pre/post-trigger capture ratio. */
 509         sr_dbg("Setting sample limit %d, trigger point at %d",
 510                         (readcount - 1) * 4, (delaycount - 1) * 4);
 511         arg[0] = ((readcount - 1) & 0xff);
 512         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 513         arg[2] = ((delaycount - 1) & 0xff);
 514         arg[3] = ((delaycount - 1) & 0xff00) >> 8;
 515         if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
 516                 return SR_ERR;
 517
 518         /* Flag register. */
 519         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 520                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 521                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 522                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 523                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 524                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 525         /*
 526          * Enable/disable OLS channel groups in the flag register according
 527          * to the channel mask. 1 means "disable channel".
 528          */
 529         devc->flag_reg |= ~(ols_changrp_mask << 2) & 0x3c;
 530         arg[0] = devc->flag_reg & 0xff;
 531         arg[1] = devc->flag_reg >> 8;
 532         arg[2] = arg[3] = 0x00;
 533         if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
 534                 return SR_ERR;
 535
 536         /* Start acquisition on the device. */
 537         if (send_shortcommand(serial, CMD_RUN) != SR_OK)
 538                 return SR_ERR;
 539
 540         /* Reset all operational states. */
 541         devc->rle_count = devc->num_transfers = 0;
 542         devc->num_samples = devc->num_bytes = 0;
 543         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 544         memset(devc->sample, 0, 4);
 545
 546         std_session_send_df_header(sdi, LOG_PREFIX);
 547
 548         /* If the device stops sending for longer than it takes to send a byte,
 549          * that means it's finished. But wait at least 100 ms to be safe.
 550          */
 551         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 552                         ols_receive_data, (struct sr_dev_inst *)sdi);
 553
 554         return SR_OK;
 555 }
 556
 557 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 558 {
 559         abort_acquisition(sdi);
 560
 561         return SR_OK;
 562 }
 563
 564 static struct sr_dev_driver ols_driver_info = {
 565         .name = "ols",
 566         .longname = "Openbench Logic Sniffer",
 567         .api_version = 1,
 568         .init = std_init,
 569         .cleanup = std_cleanup,
 570         .scan = scan,
 571         .dev_list = std_dev_list,
 572         .dev_clear = NULL,
 573         .config_get = config_get,
 574         .config_set = config_set,
 575         .config_list = config_list,
 576         .dev_open = std_serial_dev_open,
 577         .dev_close = std_serial_dev_close,
 578         .dev_acquisition_start = dev_acquisition_start,
 579         .dev_acquisition_stop = dev_acquisition_stop,
 580         .context = NULL,
 581 };
 582 SR_REGISTER_DEV_DRIVER(ols_driver_info);