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 drv_context *drvc;
  93         struct sr_serial_dev_inst *serial;
  94         GSList *l, *devices;
  95         int ret;
  96         unsigned int i;
  97         const char *conn, *serialcomm;
  98         char buf[8];
  99
 100         drvc = di->context;
 101
 102         devices = NULL;
 103
 104         conn = serialcomm = NULL;
 105         for (l = options; l; l = l->next) {
 106                 src = l->data;
 107                 switch (src->key) {
 108                 case SR_CONF_CONN:
 109                         conn = g_variant_get_string(src->data, NULL);
 110                         break;
 111                 case SR_CONF_SERIALCOMM:
 112                         serialcomm = g_variant_get_string(src->data, NULL);
 113                         break;
 114                 }
 115         }
 116         if (!conn)
 117                 return NULL;
 118
 119         if (!serialcomm)
 120                 serialcomm = SERIALCOMM;
 121
 122         serial = sr_serial_dev_inst_new(conn, serialcomm);
 123
 124         /* The discovery procedure is like this: first send the Reset
 125          * command (0x00) 5 times, since the device could be anywhere
 126          * in a 5-byte command. Then send the ID command (0x02).
 127          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 128          * have a match.
 129          */
 130         sr_info("Probing %s.", conn);
 131         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 132                 return NULL;
 133
 134         ret = SR_OK;
 135         for (i = 0; i < 5; i++) {
 136                 if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
 137                         sr_err("Port %s is not writable.", conn);
 138                         break;
 139                 }
 140         }
 141         if (ret != SR_OK) {
 142                 serial_close(serial);
 143                 sr_err("Could not use port %s. Quitting.", conn);
 144                 return NULL;
 145         }
 146         send_shortcommand(serial, CMD_ID);
 147
 148         g_usleep(RESPONSE_DELAY_US);
 149
 150         if (sp_input_waiting(serial->data) == 0) {
 151                 sr_dbg("Didn't get any reply.");
 152                 return NULL;
 153         }
 154
 155         ret = serial_read_blocking(serial, buf, 4, serial_timeout(serial, 4));
 156         if (ret != 4) {
 157                 sr_err("Invalid reply (expected 4 bytes, got %d).", ret);
 158                 return NULL;
 159         }
 160
 161         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4)) {
 162                 sr_err("Invalid reply (expected '1SLO' or '1ALS', got "
 163                        "'%c%c%c%c').", buf[0], buf[1], buf[2], buf[3]);
 164                 return NULL;
 165         }
 166
 167         /* Definitely using the OLS protocol, check if it supports
 168          * the metadata command.
 169          */
 170         send_shortcommand(serial, CMD_METADATA);
 171
 172         g_usleep(RESPONSE_DELAY_US);
 173
 174         if (sp_input_waiting(serial->data) != 0) {
 175                 /* Got metadata. */
 176                 sdi = get_metadata(serial);
 177         } else {
 178                 /* Not an OLS -- some other board that uses the sump protocol. */
 179                 sr_info("Device does not support metadata.");
 180                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 181                 sdi->status = SR_ST_INACTIVE;
 182                 sdi->vendor = g_strdup("Sump");
 183                 sdi->model = g_strdup("Logic Analyzer");
 184                 sdi->version = g_strdup("v1.0");
 185                 sdi->driver = di;
 186                 for (i = 0; i < ARRAY_SIZE(ols_channel_names); i++)
 187                         sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
 188                                         ols_channel_names[i]);
 189                 sdi->priv = ols_dev_new();
 190         }
 191         /* Configure samplerate and divider. */
 192         if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 193                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 194                                 DEFAULT_SAMPLERATE);
 195         sdi->inst_type = SR_INST_SERIAL;
 196         sdi->conn = serial;
 197
 198         drvc->instances = g_slist_append(drvc->instances, sdi);
 199         devices = g_slist_append(devices, sdi);
 200
 201         serial_close(serial);
 202
 203         return devices;
 204 }
 205
 206 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 207                 const struct sr_channel_group *cg)
 208 {
 209         struct dev_context *devc;
 210
 211         (void)cg;
 212
 213         if (!sdi)
 214                 return SR_ERR_ARG;
 215
 216         devc = sdi->priv;
 217         switch (key) {
 218         case SR_CONF_SAMPLERATE:
 219                 *data = g_variant_new_uint64(devc->cur_samplerate);
 220                 break;
 221         case SR_CONF_CAPTURE_RATIO:
 222                 *data = g_variant_new_uint64(devc->capture_ratio);
 223                 break;
 224         case SR_CONF_LIMIT_SAMPLES:
 225                 *data = g_variant_new_uint64(devc->limit_samples);
 226                 break;
 227         case SR_CONF_PATTERN_MODE:
 228                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 229                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 230                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 231                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 232                 else
 233                         *data = g_variant_new_string(STR_PATTERN_NONE);
 234                 break;
 235         case SR_CONF_RLE:
 236                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 237                 break;
 238         default:
 239                 return SR_ERR_NA;
 240         }
 241
 242         return SR_OK;
 243 }
 244
 245 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 246                 const struct sr_channel_group *cg)
 247 {
 248         struct dev_context *devc;
 249         uint16_t flag;
 250         uint64_t tmp_u64;
 251         int ret;
 252         const char *stropt;
 253
 254         (void)cg;
 255
 256         if (sdi->status != SR_ST_ACTIVE)
 257                 return SR_ERR_DEV_CLOSED;
 258
 259         devc = sdi->priv;
 260
 261         switch (key) {
 262         case SR_CONF_SAMPLERATE:
 263                 tmp_u64 = g_variant_get_uint64(data);
 264                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 265                         return SR_ERR_SAMPLERATE;
 266                 ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
 267                 break;
 268         case SR_CONF_LIMIT_SAMPLES:
 269                 tmp_u64 = g_variant_get_uint64(data);
 270                 if (tmp_u64 < MIN_NUM_SAMPLES)
 271                         return SR_ERR;
 272                 devc->limit_samples = tmp_u64;
 273                 ret = SR_OK;
 274                 break;
 275         case SR_CONF_CAPTURE_RATIO:
 276                 devc->capture_ratio = g_variant_get_uint64(data);
 277                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100)
 278                         ret = SR_ERR;
 279                 else
 280                         ret = SR_OK;
 281                 break;
 282         case SR_CONF_EXTERNAL_CLOCK:
 283                 if (g_variant_get_boolean(data)) {
 284                         sr_info("Enabling external clock.");
 285                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 286                 } else {
 287                         sr_info("Disabled external clock.");
 288                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 289                 }
 290                 ret = SR_OK;
 291                 break;
 292         case SR_CONF_PATTERN_MODE:
 293                 stropt = g_variant_get_string(data, NULL);
 294                 ret = SR_OK;
 295                 flag = 0xffff;
 296                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 297                         sr_info("Disabling test modes.");
 298                         flag = 0x0000;
 299                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 300                         sr_info("Enabling internal test mode.");
 301                         flag = FLAG_INTERNAL_TEST_MODE;
 302                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 303                         sr_info("Enabling external test mode.");
 304                         flag = FLAG_EXTERNAL_TEST_MODE;
 305                 } else {
 306                         ret = SR_ERR;
 307                 }
 308                 if (flag != 0xffff) {
 309                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 310                         devc->flag_reg |= flag;
 311                 }
 312                 break;
 313         case SR_CONF_SWAP:
 314                 if (g_variant_get_boolean(data)) {
 315                         sr_info("Enabling channel swapping.");
 316                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 317                 } else {
 318                         sr_info("Disabling channel swapping.");
 319                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 320                 }
 321                 ret = SR_OK;
 322                 break;
 323
 324         case SR_CONF_RLE:
 325                 if (g_variant_get_boolean(data)) {
 326                         sr_info("Enabling RLE.");
 327                         devc->flag_reg |= FLAG_RLE;
 328                 } else {
 329                         sr_info("Disabling RLE.");
 330                         devc->flag_reg &= ~FLAG_RLE;
 331                 }
 332                 ret = SR_OK;
 333                 break;
 334         default:
 335                 ret = SR_ERR_NA;
 336         }
 337
 338         return ret;
 339 }
 340
 341 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 342                 const struct sr_channel_group *cg)
 343 {
 344         struct dev_context *devc;
 345         GVariant *gvar, *grange[2];
 346         GVariantBuilder gvb;
 347         int num_ols_changrp, i;
 348
 349         (void)cg;
 350
 351         switch (key) {
 352         case SR_CONF_SCAN_OPTIONS:
 353                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 354                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 355                 break;
 356         case SR_CONF_DEVICE_OPTIONS:
 357                 if (!sdi)
 358                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 359                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 360                 else
 361                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 362                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 363                 break;
 364         case SR_CONF_SAMPLERATE:
 365                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 366                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 367                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 368                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 369                 *data = g_variant_builder_end(&gvb);
 370                 break;
 371         case SR_CONF_TRIGGER_MATCH:
 372                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 373                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 374                                 sizeof(int32_t));
 375                 break;
 376         case SR_CONF_PATTERN_MODE:
 377                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 378                 break;
 379         case SR_CONF_LIMIT_SAMPLES:
 380                 if (!sdi)
 381                         return SR_ERR_ARG;
 382                 devc = sdi->priv;
 383                 if (devc->flag_reg & FLAG_RLE)
 384                         return SR_ERR_NA;
 385                 if (devc->max_samples == 0)
 386                         /* Device didn't specify sample memory size in metadata. */
 387                         return SR_ERR_NA;
 388                 /*
 389                  * Channel groups are turned off if no channels in that group are
 390                  * enabled, making more room for samples for the enabled group.
 391                 */
 392                 ols_channel_mask(sdi);
 393                 num_ols_changrp = 0;
 394                 for (i = 0; i < 4; i++) {
 395                         if (devc->channel_mask & (0xff << (i * 8)))
 396                                 num_ols_changrp++;
 397                 }
 398                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 399                 if (num_ols_changrp)
 400                         grange[1] = g_variant_new_uint64(devc->max_samples / num_ols_changrp);
 401                 else
 402                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 403                 *data = g_variant_new_tuple(grange, 2);
 404                 break;
 405         default:
 406                 return SR_ERR_NA;
 407         }
 408
 409         return SR_OK;
 410 }
 411
 412 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 413 {
 414         struct dev_context *devc;
 415         struct sr_serial_dev_inst *serial;
 416         uint8_t cmd, arg[4];
 417
 418         devc = sdi->priv;
 419         serial = sdi->conn;
 420
 421         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 422         arg[0] = devc->trigger_mask[stage] & 0xff;
 423         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 424         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 425         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 426         if (send_longcommand(serial, cmd, arg) != SR_OK)
 427                 return SR_ERR;
 428
 429         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 430         arg[0] = devc->trigger_value[stage] & 0xff;
 431         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 432         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 433         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 434         if (send_longcommand(serial, cmd, arg) != SR_OK)
 435                 return SR_ERR;
 436
 437         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 438         arg[0] = arg[1] = arg[3] = 0x00;
 439         arg[2] = stage;
 440         if (stage == devc->num_stages)
 441                 /* Last stage, fire when this one matches. */
 442                 arg[3] |= TRIGGER_START;
 443         if (send_longcommand(serial, cmd, arg) != SR_OK)
 444                 return SR_ERR;
 445
 446         return SR_OK;
 447 }
 448
 449 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 450 {
 451         struct dev_context *devc;
 452         struct sr_serial_dev_inst *serial;
 453         uint16_t samplecount, readcount, delaycount;
 454         uint8_t ols_changrp_mask, arg[4];
 455         int num_ols_changrp;
 456         int ret, i;
 457
 458         if (sdi->status != SR_ST_ACTIVE)
 459                 return SR_ERR_DEV_CLOSED;
 460
 461         devc = sdi->priv;
 462         serial = sdi->conn;
 463
 464         ols_channel_mask(sdi);
 465
 466         num_ols_changrp = 0;
 467         ols_changrp_mask = 0;
 468         for (i = 0; i < 4; i++) {
 469                 if (devc->channel_mask & (0xff << (i * 8))) {
 470                         ols_changrp_mask |= (1 << i);
 471                         num_ols_changrp++;
 472                 }
 473         }
 474
 475         /*
 476          * Limit readcount to prevent reading past the end of the hardware
 477          * buffer.
 478          */
 479         samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
 480         readcount = samplecount / 4;
 481
 482         /* Rather read too many samples than too few. */
 483         if (samplecount % 4 != 0)
 484                 readcount++;
 485
 486         /* Basic triggers. */
 487         if (ols_convert_trigger(sdi) != SR_OK) {
 488                 sr_err("Failed to configure channels.");
 489                 return SR_ERR;
 490         }
 491         if (devc->num_stages > 0) {
 492                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 493                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 494                 for (i = 0; i <= devc->num_stages; i++) {
 495                         sr_dbg("Setting OLS stage %d trigger.", i);
 496                         if ((ret = set_trigger(sdi, i)) != SR_OK)
 497                                 return ret;
 498                 }
 499         } else {
 500                 /* No triggers configured, force trigger on first stage. */
 501                 sr_dbg("Forcing trigger at stage 0.");
 502                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 503                         return ret;
 504                 delaycount = readcount;
 505         }
 506
 507         /* Samplerate. */
 508         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 509                         devc->cur_samplerate, devc->cur_samplerate_divider);
 510         arg[0] = devc->cur_samplerate_divider & 0xff;
 511         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 512         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 513         arg[3] = 0x00;
 514         if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
 515                 return SR_ERR;
 516
 517         /* Send sample limit and pre/post-trigger capture ratio. */
 518         sr_dbg("Setting sample limit %d, trigger point at %d",
 519                         (readcount - 1) * 4, (delaycount - 1) * 4);
 520         arg[0] = ((readcount - 1) & 0xff);
 521         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 522         arg[2] = ((delaycount - 1) & 0xff);
 523         arg[3] = ((delaycount - 1) & 0xff00) >> 8;
 524         if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
 525                 return SR_ERR;
 526
 527         /* Flag register. */
 528         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 529                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 530                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 531                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 532                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 533                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 534         /*
 535          * Enable/disable OLS channel groups in the flag register according
 536          * to the channel mask. 1 means "disable channel".
 537          */
 538         devc->flag_reg |= ~(ols_changrp_mask << 2) & 0x3c;
 539         arg[0] = devc->flag_reg & 0xff;
 540         arg[1] = devc->flag_reg >> 8;
 541         arg[2] = arg[3] = 0x00;
 542         if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
 543                 return SR_ERR;
 544
 545         /* Start acquisition on the device. */
 546         if (send_shortcommand(serial, CMD_RUN) != SR_OK)
 547                 return SR_ERR;
 548
 549         /* Reset all operational states. */
 550         devc->rle_count = devc->num_transfers = 0;
 551         devc->num_samples = devc->num_bytes = 0;
 552         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 553         memset(devc->sample, 0, 4);
 554
 555         std_session_send_df_header(sdi, LOG_PREFIX);
 556
 557         /* If the device stops sending for longer than it takes to send a byte,
 558          * that means it's finished. But wait at least 100 ms to be safe.
 559          */
 560         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 561                         ols_receive_data, (struct sr_dev_inst *)sdi);
 562
 563         return SR_OK;
 564 }
 565
 566 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 567 {
 568         abort_acquisition(sdi);
 569
 570         return SR_OK;
 571 }
 572
 573 SR_PRIV struct sr_dev_driver ols_driver_info = {
 574         .name = "ols",
 575         .longname = "Openbench Logic Sniffer",
 576         .api_version = 1,
 577         .init = std_init,
 578         .cleanup = std_cleanup,
 579         .scan = scan,
 580         .dev_list = std_dev_list,
 581         .dev_clear = NULL,
 582         .config_get = config_get,
 583         .config_set = config_set,
 584         .config_list = config_list,
 585         .dev_open = std_serial_dev_open,
 586         .dev_close = std_serial_dev_close,
 587         .dev_acquisition_start = dev_acquisition_start,
 588         .dev_acquisition_stop = dev_acquisition_stop,
 589         .context = NULL,
 590 };
 591 SR_REGISTER_DEV_DRIVER(ols_driver_info);