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 "protocol.h"
  21 #include <libserialport.h>
  22
  23 #define SERIALCOMM "115200/8n1"
  24
  25 static const uint32_t scanopts[] = {
  26         SR_CONF_CONN,
  27         SR_CONF_SERIALCOMM,
  28 };
  29
  30 static const uint32_t devopts[] = {
  31         SR_CONF_LOGIC_ANALYZER,
  32         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  33         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  34         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  35         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  36         SR_CONF_EXTERNAL_CLOCK | SR_CONF_SET,
  37         SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  38         SR_CONF_SWAP | SR_CONF_SET,
  39         SR_CONF_RLE | SR_CONF_GET | SR_CONF_SET,
  40 };
  41
  42 static const int32_t trigger_matches[] = {
  43         SR_TRIGGER_ZERO,
  44         SR_TRIGGER_ONE,
  45 };
  46
  47 #define STR_PATTERN_NONE     "None"
  48 #define STR_PATTERN_EXTERNAL "External"
  49 #define STR_PATTERN_INTERNAL "Internal"
  50
  51 /* Supported methods of test pattern outputs */
  52 enum {
  53         /**
  54          * Capture pins 31:16 (unbuffered wing) output a test pattern
  55          * that can captured on pins 0:15.
  56          */
  57         PATTERN_EXTERNAL,
  58
  59         /** Route test pattern internally to capture buffer. */
  60         PATTERN_INTERNAL,
  61 };
  62
  63 static const char *patterns[] = {
  64         STR_PATTERN_NONE,
  65         STR_PATTERN_EXTERNAL,
  66         STR_PATTERN_INTERNAL,
  67 };
  68
  69 /* Channels are numbered 0-31 (on the PCB silkscreen). */
  70 SR_PRIV const char *ols_channel_names[NUM_CHANNELS + 1] = {
  71         "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
  72         "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
  73         "24", "25", "26", "27", "28", "29", "30", "31",
  74         NULL,
  75 };
  76
  77 /* Default supported samplerates, can be overridden by device metadata. */
  78 static const uint64_t samplerates[] = {
  79         SR_HZ(10),
  80         SR_MHZ(200),
  81         SR_HZ(1),
  82 };
  83
  84 SR_PRIV struct sr_dev_driver ols_driver_info;
  85 static struct sr_dev_driver *di = &ols_driver_info;
  86
  87 static int init(struct sr_context *sr_ctx)
  88 {
  89         return std_init(sr_ctx, di, LOG_PREFIX);
  90 }
  91
  92 static GSList *scan(GSList *options)
  93 {
  94         struct sr_config *src;
  95         struct sr_dev_inst *sdi;
  96         struct drv_context *drvc;
  97         struct dev_context *devc;
  98         struct sr_channel *ch;
  99         struct sr_serial_dev_inst *serial;
 100         GPollFD probefd;
 101         GSList *l, *devices;
 102         int ret, i;
 103         const char *conn, *serialcomm;
 104         char buf[8];
 105
 106         drvc = di->priv;
 107
 108         devices = NULL;
 109
 110         conn = serialcomm = NULL;
 111         for (l = options; l; l = l->next) {
 112                 src = l->data;
 113                 switch (src->key) {
 114                 case SR_CONF_CONN:
 115                         conn = g_variant_get_string(src->data, NULL);
 116                         break;
 117                 case SR_CONF_SERIALCOMM:
 118                         serialcomm = g_variant_get_string(src->data, NULL);
 119                         break;
 120                 }
 121         }
 122         if (!conn)
 123                 return NULL;
 124
 125         if (serialcomm == NULL)
 126                 serialcomm = SERIALCOMM;
 127
 128         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 129                 return NULL;
 130
 131         /* The discovery procedure is like this: first send the Reset
 132          * command (0x00) 5 times, since the device could be anywhere
 133          * in a 5-byte command. Then send the ID command (0x02).
 134          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 135          * have a match.
 136          */
 137         sr_info("Probing %s.", conn);
 138         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 139                 return NULL;
 140
 141         ret = SR_OK;
 142         for (i = 0; i < 5; i++) {
 143                 if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
 144                         sr_err("Port %s is not writable.", conn);
 145                         break;
 146                 }
 147         }
 148         if (ret != SR_OK) {
 149                 serial_close(serial);
 150                 sr_err("Could not use port %s. Quitting.", conn);
 151                 return NULL;
 152         }
 153         send_shortcommand(serial, CMD_ID);
 154
 155         /* Wait 10ms for a response. */
 156         g_usleep(10000);
 157
 158         sp_get_port_handle(serial->data, &probefd.fd);
 159         probefd.events = G_IO_IN;
 160         g_poll(&probefd, 1, 1);
 161
 162         if (probefd.revents != G_IO_IN)
 163                 return NULL;
 164         if (serial_read_blocking(serial, buf, 4) != 4)
 165                 return NULL;
 166         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 167                 return NULL;
 168
 169         /* Definitely using the OLS protocol, check if it supports
 170          * the metadata command.
 171          */
 172         send_shortcommand(serial, CMD_METADATA);
 173         if (g_poll(&probefd, 1, 10) > 0) {
 174                 /* Got metadata. */
 175                 sdi = get_metadata(serial);
 176                 devc = sdi->priv;
 177         } else {
 178                 /* Not an OLS -- some other board that uses the sump protocol. */
 179                 sr_info("Device does not support metadata.");
 180                 sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
 181                                 "Sump", "Logic Analyzer", "v1.0");
 182                 sdi->driver = di;
 183                 for (i = 0; i < 32; i++) {
 184                         if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
 185                                         ols_channel_names[i])))
 186                                 return 0;
 187                         sdi->channels = g_slist_append(sdi->channels, ch);
 188                 }
 189                 devc = ols_dev_new();
 190                 sdi->priv = devc;
 191         }
 192         /* Configure samplerate and divider. */
 193         if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 194                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 195                                 DEFAULT_SAMPLERATE);
 196         sdi->inst_type = SR_INST_SERIAL;
 197         sdi->conn = serial;
 198
 199         drvc->instances = g_slist_append(drvc->instances, sdi);
 200         devices = g_slist_append(devices, sdi);
 201
 202         serial_close(serial);
 203
 204         return devices;
 205 }
 206
 207 static GSList *dev_list(void)
 208 {
 209         return ((struct drv_context *)(di->priv))->instances;
 210 }
 211
 212 static int cleanup(void)
 213 {
 214         return std_dev_clear(di, NULL);
 215 }
 216
 217 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 218                 const struct sr_channel_group *cg)
 219 {
 220         struct dev_context *devc;
 221
 222         (void)cg;
 223
 224         if (!sdi)
 225                 return SR_ERR_ARG;
 226
 227         devc = sdi->priv;
 228         switch (key) {
 229         case SR_CONF_SAMPLERATE:
 230                 *data = g_variant_new_uint64(devc->cur_samplerate);
 231                 break;
 232         case SR_CONF_CAPTURE_RATIO:
 233                 *data = g_variant_new_uint64(devc->capture_ratio);
 234                 break;
 235         case SR_CONF_LIMIT_SAMPLES:
 236                 *data = g_variant_new_uint64(devc->limit_samples);
 237                 break;
 238         case SR_CONF_PATTERN_MODE:
 239                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 240                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 241                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 242                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 243                 else
 244                         *data = g_variant_new_string(STR_PATTERN_NONE);
 245                 break;
 246         case SR_CONF_RLE:
 247                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 248                 break;
 249         default:
 250                 return SR_ERR_NA;
 251         }
 252
 253         return SR_OK;
 254 }
 255
 256 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 257                 const struct sr_channel_group *cg)
 258 {
 259         struct dev_context *devc;
 260         uint16_t flag;
 261         uint64_t tmp_u64;
 262         int ret;
 263         const char *stropt;
 264
 265         (void)cg;
 266
 267         if (sdi->status != SR_ST_ACTIVE)
 268                 return SR_ERR_DEV_CLOSED;
 269
 270         devc = sdi->priv;
 271
 272         switch (key) {
 273         case SR_CONF_SAMPLERATE:
 274                 tmp_u64 = g_variant_get_uint64(data);
 275                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 276                         return SR_ERR_SAMPLERATE;
 277                 ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
 278                 break;
 279         case SR_CONF_LIMIT_SAMPLES:
 280                 tmp_u64 = g_variant_get_uint64(data);
 281                 if (tmp_u64 < MIN_NUM_SAMPLES)
 282                         return SR_ERR;
 283                 devc->limit_samples = tmp_u64;
 284                 ret = SR_OK;
 285                 break;
 286         case SR_CONF_CAPTURE_RATIO:
 287                 devc->capture_ratio = g_variant_get_uint64(data);
 288                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 289                         devc->capture_ratio = 0;
 290                         ret = SR_ERR;
 291                 } else
 292                         ret = SR_OK;
 293                 break;
 294         case SR_CONF_EXTERNAL_CLOCK:
 295                 if (g_variant_get_boolean(data)) {
 296                         sr_info("Enabling external clock.");
 297                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 298                 } else {
 299                         sr_info("Disabled external clock.");
 300                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 301                 }
 302                 ret = SR_OK;
 303                 break;
 304         case SR_CONF_PATTERN_MODE:
 305                 stropt = g_variant_get_string(data, NULL);
 306                 ret = SR_OK;
 307                 flag = 0xffff;
 308                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 309                         sr_info("Disabling test modes.");
 310                         flag = 0x0000;
 311                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 312                         sr_info("Enabling internal test mode.");
 313                         flag = FLAG_INTERNAL_TEST_MODE;
 314                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 315                         sr_info("Enabling external test mode.");
 316                         flag = FLAG_EXTERNAL_TEST_MODE;
 317                 } else {
 318                         ret = SR_ERR;
 319                 }
 320                 if (flag != 0xffff) {
 321                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 322                         devc->flag_reg |= flag;
 323                 }
 324                 break;
 325         case SR_CONF_SWAP:
 326                 if (g_variant_get_boolean(data)) {
 327                         sr_info("Enabling channel swapping.");
 328                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 329                 } else {
 330                         sr_info("Disabling channel swapping.");
 331                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 332                 }
 333                 ret = SR_OK;
 334                 break;
 335
 336         case SR_CONF_RLE:
 337                 if (g_variant_get_boolean(data)) {
 338                         sr_info("Enabling RLE.");
 339                         devc->flag_reg |= FLAG_RLE;
 340                 } else {
 341                         sr_info("Disabling RLE.");
 342                         devc->flag_reg &= ~FLAG_RLE;
 343                 }
 344                 ret = SR_OK;
 345                 break;
 346         default:
 347                 ret = SR_ERR_NA;
 348         }
 349
 350         return ret;
 351 }
 352
 353 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 354                 const struct sr_channel_group *cg)
 355 {
 356         struct dev_context *devc;
 357         GVariant *gvar, *grange[2];
 358         GVariantBuilder gvb;
 359         int num_ols_changrp, i;
 360
 361         (void)cg;
 362
 363         switch (key) {
 364         case SR_CONF_SCAN_OPTIONS:
 365                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 366                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 367                 break;
 368         case SR_CONF_DEVICE_OPTIONS:
 369                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 370                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 371                 break;
 372         case SR_CONF_SAMPLERATE:
 373                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 374                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 375                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 376                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 377                 *data = g_variant_builder_end(&gvb);
 378                 break;
 379         case SR_CONF_TRIGGER_MATCH:
 380                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 381                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 382                                 sizeof(int32_t));
 383                 break;
 384         case SR_CONF_PATTERN_MODE:
 385                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 386                 break;
 387         case SR_CONF_LIMIT_SAMPLES:
 388                 if (!sdi)
 389                         return SR_ERR_ARG;
 390                 devc = sdi->priv;
 391                 if (devc->flag_reg & FLAG_RLE)
 392                         return SR_ERR_NA;
 393                 if (devc->max_samples == 0)
 394                         /* Device didn't specify sample memory size in metadata. */
 395                         return SR_ERR_NA;
 396                 /*
 397                  * Channel groups are turned off if no channels in that group are
 398                  * enabled, making more room for samples for the enabled group.
 399                 */
 400                 ols_channel_mask(sdi);
 401                 num_ols_changrp = 0;
 402                 for (i = 0; i < 4; i++) {
 403                         if (devc->channel_mask & (0xff << (i * 8)))
 404                                 num_ols_changrp++;
 405                 }
 406                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 407                 if (num_ols_changrp)
 408                         grange[1] = g_variant_new_uint64(devc->max_samples / num_ols_changrp);
 409                 else
 410                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 411                 *data = g_variant_new_tuple(grange, 2);
 412                 break;
 413         default:
 414                 return SR_ERR_NA;
 415         }
 416
 417         return SR_OK;
 418 }
 419
 420 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 421 {
 422         struct dev_context *devc;
 423         struct sr_serial_dev_inst *serial;
 424         uint8_t cmd, arg[4];
 425
 426         devc = sdi->priv;
 427         serial = sdi->conn;
 428
 429         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 430         arg[0] = devc->trigger_mask[stage] & 0xff;
 431         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 432         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 433         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 434         if (send_longcommand(serial, cmd, arg) != SR_OK)
 435                 return SR_ERR;
 436
 437         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 438         arg[0] = devc->trigger_value[stage] & 0xff;
 439         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 440         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 441         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 442         if (send_longcommand(serial, cmd, arg) != SR_OK)
 443                 return SR_ERR;
 444
 445         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 446         arg[0] = arg[1] = arg[3] = 0x00;
 447         arg[2] = stage;
 448         if (stage == devc->num_stages)
 449                 /* Last stage, fire when this one matches. */
 450                 arg[3] |= TRIGGER_START;
 451         if (send_longcommand(serial, cmd, arg) != SR_OK)
 452                 return SR_ERR;
 453
 454         return SR_OK;
 455 }
 456
 457 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 458                 void *cb_data)
 459 {
 460         struct dev_context *devc;
 461         struct sr_serial_dev_inst *serial;
 462         uint16_t samplecount, readcount, delaycount;
 463         uint8_t ols_changrp_mask, arg[4];
 464         int num_ols_changrp;
 465         int ret, i;
 466
 467         if (sdi->status != SR_ST_ACTIVE)
 468                 return SR_ERR_DEV_CLOSED;
 469
 470         devc = sdi->priv;
 471         serial = sdi->conn;
 472
 473         ols_channel_mask(sdi);
 474
 475         num_ols_changrp = 0;
 476         ols_changrp_mask = 0;
 477         for (i = 0; i < 4; i++) {
 478                 if (devc->channel_mask & (0xff << (i * 8))) {
 479                         ols_changrp_mask |= (1 << i);
 480                         num_ols_changrp++;
 481                 }
 482         }
 483
 484         /*
 485          * Limit readcount to prevent reading past the end of the hardware
 486          * buffer.
 487          */
 488         samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
 489         readcount = samplecount / 4;
 490
 491         /* Rather read too many samples than too few. */
 492         if (samplecount % 4 != 0)
 493                 readcount++;
 494
 495         /* Basic triggers. */
 496         if (ols_convert_trigger(sdi) != SR_OK) {
 497                 sr_err("Failed to configure channels.");
 498                 return SR_ERR;
 499         }
 500         if (devc->num_stages > 0) {
 501                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 502                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 503                 for (i = 0; i <= devc->num_stages; i++) {
 504                         sr_dbg("Setting OLS stage %d trigger.", i);
 505                         if ((ret = set_trigger(sdi, i)) != SR_OK)
 506                                 return ret;
 507                 }
 508         } else {
 509                 /* No triggers configured, force trigger on first stage. */
 510                 sr_dbg("Forcing trigger at stage 0.");
 511                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 512                         return ret;
 513                 delaycount = readcount;
 514         }
 515
 516         /* Samplerate. */
 517         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 518                         devc->cur_samplerate, devc->cur_samplerate_divider);
 519         arg[0] = devc->cur_samplerate_divider & 0xff;
 520         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 521         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 522         arg[3] = 0x00;
 523         if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
 524                 return SR_ERR;
 525
 526         /* Send sample limit and pre/post-trigger capture ratio. */
 527         sr_dbg("Setting sample limit %d, trigger point at %d",
 528                         (readcount - 1) * 4, (delaycount - 1) * 4);
 529         arg[0] = ((readcount - 1) & 0xff);
 530         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 531         arg[2] = ((delaycount - 1) & 0xff);
 532         arg[3] = ((delaycount - 1) & 0xff00) >> 8;
 533         if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
 534                 return SR_ERR;
 535
 536         /* Flag register. */
 537         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 538                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 539                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 540                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 541                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 542                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 543         /*
 544          * Enable/disable OLS channel groups in the flag register according
 545          * to the channel mask. 1 means "disable channel".
 546          */
 547         devc->flag_reg |= ~(ols_changrp_mask << 2) & 0x3c;
 548         arg[0] = devc->flag_reg & 0xff;
 549         arg[1] = devc->flag_reg >> 8;
 550         arg[2] = arg[3] = 0x00;
 551         if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
 552                 return SR_ERR;
 553
 554         /* Start acquisition on the device. */
 555         if (send_shortcommand(serial, CMD_RUN) != SR_OK)
 556                 return SR_ERR;
 557
 558         /* Reset all operational states. */
 559         devc->rle_count = devc->num_transfers = 0;
 560         devc->num_samples = devc->num_bytes = 0;
 561         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 562         memset(devc->sample, 0, 4);
 563
 564         /* Send header packet to the session bus. */
 565         std_session_send_df_header(cb_data, LOG_PREFIX);
 566
 567         serial_source_add(sdi->session, serial, G_IO_IN, -1,
 568                         ols_receive_data, cb_data);
 569
 570         return SR_OK;
 571 }
 572
 573 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 574 {
 575         (void)cb_data;
 576
 577         abort_acquisition(sdi);
 578
 579         return SR_OK;
 580 }
 581
 582 SR_PRIV struct sr_dev_driver ols_driver_info = {
 583         .name = "ols",
 584         .longname = "Openbench Logic Sniffer",
 585         .api_version = 1,
 586         .init = init,
 587         .cleanup = cleanup,
 588         .scan = scan,
 589         .dev_list = dev_list,
 590         .dev_clear = NULL,
 591         .config_get = config_get,
 592         .config_set = config_set,
 593         .config_list = config_list,
 594         .dev_open = std_serial_dev_open,
 595         .dev_close = std_serial_dev_close,
 596         .dev_acquisition_start = dev_acquisition_start,
 597         .dev_acquisition_stop = dev_acquisition_stop,
 598         .priv = NULL,
 599 };