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 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[NUM_CHANNELS + 1] = {
  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         NULL,
  78 };
  79
  80 /* Default supported samplerates, can be overridden by device metadata. */
  81 static const uint64_t samplerates[] = {
  82         SR_HZ(10),
  83         SR_MHZ(200),
  84         SR_HZ(1),
  85 };
  86
  87 SR_PRIV struct sr_dev_driver ols_driver_info;
  88 static struct sr_dev_driver *di = &ols_driver_info;
  89
  90 static int init(struct sr_context *sr_ctx)
  91 {
  92         return std_init(sr_ctx, di, LOG_PREFIX);
  93 }
  94
  95 static GSList *scan(GSList *options)
  96 {
  97         struct sr_config *src;
  98         struct sr_dev_inst *sdi;
  99         struct drv_context *drvc;
 100         struct dev_context *devc;
 101         struct sr_channel *ch;
 102         struct sr_serial_dev_inst *serial;
 103         GSList *l, *devices;
 104         int ret, i;
 105         const char *conn, *serialcomm;
 106         char buf[8];
 107
 108         drvc = di->priv;
 109
 110         devices = NULL;
 111
 112         conn = serialcomm = NULL;
 113         for (l = options; l; l = l->next) {
 114                 src = l->data;
 115                 switch (src->key) {
 116                 case SR_CONF_CONN:
 117                         conn = g_variant_get_string(src->data, NULL);
 118                         break;
 119                 case SR_CONF_SERIALCOMM:
 120                         serialcomm = g_variant_get_string(src->data, NULL);
 121                         break;
 122                 }
 123         }
 124         if (!conn)
 125                 return NULL;
 126
 127         if (serialcomm == NULL)
 128                 serialcomm = SERIALCOMM;
 129
 130         serial = sr_serial_dev_inst_new(conn, serialcomm);
 131
 132         /* The discovery procedure is like this: first send the Reset
 133          * command (0x00) 5 times, since the device could be anywhere
 134          * in a 5-byte command. Then send the ID command (0x02).
 135          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 136          * have a match.
 137          */
 138         sr_info("Probing %s.", conn);
 139         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 140                 return NULL;
 141
 142         ret = SR_OK;
 143         for (i = 0; i < 5; i++) {
 144                 if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
 145                         sr_err("Port %s is not writable.", conn);
 146                         break;
 147                 }
 148         }
 149         if (ret != SR_OK) {
 150                 serial_close(serial);
 151                 sr_err("Could not use port %s. Quitting.", conn);
 152                 return NULL;
 153         }
 154         send_shortcommand(serial, CMD_ID);
 155
 156         /* Wait 10ms for a response. */
 157         g_usleep(10000);
 158
 159         if (sp_input_waiting(serial->data) == 0) {
 160                 sr_dbg("Didn't get any reply.");
 161                 return NULL;
 162         }
 163
 164         ret = serial_read_blocking(serial, buf, 4, serial_timeout(serial, 4));
 165         if (ret != 4) {
 166                 sr_err("Invalid reply (expected 4 bytes, got %d).", ret);
 167                 return NULL;
 168         }
 169
 170         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4)) {
 171                 sr_err("Invalid reply (expected '1SLO' or '1ALS', got "
 172                        "'%c%c%c%c').", buf[0], buf[1], buf[2], buf[3]);
 173                 return NULL;
 174         }
 175
 176         /* Definitely using the OLS protocol, check if it supports
 177          * the metadata command.
 178          */
 179         send_shortcommand(serial, CMD_METADATA);
 180
 181         /* Wait 10ms for a response. */
 182         g_usleep(10000);
 183
 184         if (sp_input_waiting(serial->data) != 0) {
 185                 /* Got metadata. */
 186                 sdi = get_metadata(serial);
 187                 devc = sdi->priv;
 188         } else {
 189                 /* Not an OLS -- some other board that uses the sump protocol. */
 190                 sr_info("Device does not support metadata.");
 191                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 192                 sdi->status = SR_ST_INACTIVE;
 193                 sdi->vendor = g_strdup("Sump");
 194                 sdi->model = g_strdup("Logic Analyzer");
 195                 sdi->version = g_strdup("v1.0");
 196                 sdi->driver = di;
 197                 for (i = 0; i < 32; i++) {
 198                         ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
 199                                         ols_channel_names[i]);
 200                         sdi->channels = g_slist_append(sdi->channels, ch);
 201                 }
 202                 devc = ols_dev_new();
 203                 sdi->priv = devc;
 204         }
 205         /* Configure samplerate and divider. */
 206         if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 207                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 208                                 DEFAULT_SAMPLERATE);
 209         sdi->inst_type = SR_INST_SERIAL;
 210         sdi->conn = serial;
 211
 212         drvc->instances = g_slist_append(drvc->instances, sdi);
 213         devices = g_slist_append(devices, sdi);
 214
 215         serial_close(serial);
 216
 217         return devices;
 218 }
 219
 220 static GSList *dev_list(void)
 221 {
 222         return ((struct drv_context *)(di->priv))->instances;
 223 }
 224
 225 static int cleanup(void)
 226 {
 227         return std_dev_clear(di, NULL);
 228 }
 229
 230 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 231                 const struct sr_channel_group *cg)
 232 {
 233         struct dev_context *devc;
 234
 235         (void)cg;
 236
 237         if (!sdi)
 238                 return SR_ERR_ARG;
 239
 240         devc = sdi->priv;
 241         switch (key) {
 242         case SR_CONF_SAMPLERATE:
 243                 *data = g_variant_new_uint64(devc->cur_samplerate);
 244                 break;
 245         case SR_CONF_CAPTURE_RATIO:
 246                 *data = g_variant_new_uint64(devc->capture_ratio);
 247                 break;
 248         case SR_CONF_LIMIT_SAMPLES:
 249                 *data = g_variant_new_uint64(devc->limit_samples);
 250                 break;
 251         case SR_CONF_PATTERN_MODE:
 252                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 253                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 254                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 255                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 256                 else
 257                         *data = g_variant_new_string(STR_PATTERN_NONE);
 258                 break;
 259         case SR_CONF_RLE:
 260                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 261                 break;
 262         default:
 263                 return SR_ERR_NA;
 264         }
 265
 266         return SR_OK;
 267 }
 268
 269 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 270                 const struct sr_channel_group *cg)
 271 {
 272         struct dev_context *devc;
 273         uint16_t flag;
 274         uint64_t tmp_u64;
 275         int ret;
 276         const char *stropt;
 277
 278         (void)cg;
 279
 280         if (sdi->status != SR_ST_ACTIVE)
 281                 return SR_ERR_DEV_CLOSED;
 282
 283         devc = sdi->priv;
 284
 285         switch (key) {
 286         case SR_CONF_SAMPLERATE:
 287                 tmp_u64 = g_variant_get_uint64(data);
 288                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 289                         return SR_ERR_SAMPLERATE;
 290                 ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
 291                 break;
 292         case SR_CONF_LIMIT_SAMPLES:
 293                 tmp_u64 = g_variant_get_uint64(data);
 294                 if (tmp_u64 < MIN_NUM_SAMPLES)
 295                         return SR_ERR;
 296                 devc->limit_samples = tmp_u64;
 297                 ret = SR_OK;
 298                 break;
 299         case SR_CONF_CAPTURE_RATIO:
 300                 devc->capture_ratio = g_variant_get_uint64(data);
 301                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 302                         devc->capture_ratio = 0;
 303                         ret = SR_ERR;
 304                 } else
 305                         ret = SR_OK;
 306                 break;
 307         case SR_CONF_EXTERNAL_CLOCK:
 308                 if (g_variant_get_boolean(data)) {
 309                         sr_info("Enabling external clock.");
 310                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 311                 } else {
 312                         sr_info("Disabled external clock.");
 313                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 314                 }
 315                 ret = SR_OK;
 316                 break;
 317         case SR_CONF_PATTERN_MODE:
 318                 stropt = g_variant_get_string(data, NULL);
 319                 ret = SR_OK;
 320                 flag = 0xffff;
 321                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 322                         sr_info("Disabling test modes.");
 323                         flag = 0x0000;
 324                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 325                         sr_info("Enabling internal test mode.");
 326                         flag = FLAG_INTERNAL_TEST_MODE;
 327                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 328                         sr_info("Enabling external test mode.");
 329                         flag = FLAG_EXTERNAL_TEST_MODE;
 330                 } else {
 331                         ret = SR_ERR;
 332                 }
 333                 if (flag != 0xffff) {
 334                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 335                         devc->flag_reg |= flag;
 336                 }
 337                 break;
 338         case SR_CONF_SWAP:
 339                 if (g_variant_get_boolean(data)) {
 340                         sr_info("Enabling channel swapping.");
 341                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 342                 } else {
 343                         sr_info("Disabling channel swapping.");
 344                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 345                 }
 346                 ret = SR_OK;
 347                 break;
 348
 349         case SR_CONF_RLE:
 350                 if (g_variant_get_boolean(data)) {
 351                         sr_info("Enabling RLE.");
 352                         devc->flag_reg |= FLAG_RLE;
 353                 } else {
 354                         sr_info("Disabling RLE.");
 355                         devc->flag_reg &= ~FLAG_RLE;
 356                 }
 357                 ret = SR_OK;
 358                 break;
 359         default:
 360                 ret = SR_ERR_NA;
 361         }
 362
 363         return ret;
 364 }
 365
 366 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 367                 const struct sr_channel_group *cg)
 368 {
 369         struct dev_context *devc;
 370         GVariant *gvar, *grange[2];
 371         GVariantBuilder gvb;
 372         int num_ols_changrp, i;
 373
 374         (void)cg;
 375
 376         switch (key) {
 377         case SR_CONF_SCAN_OPTIONS:
 378                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 379                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 380                 break;
 381         case SR_CONF_DEVICE_OPTIONS:
 382                 if (!sdi)
 383                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 384                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 385                 else
 386                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 387                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 388                 break;
 389         case SR_CONF_SAMPLERATE:
 390                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 391                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 392                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 393                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 394                 *data = g_variant_builder_end(&gvb);
 395                 break;
 396         case SR_CONF_TRIGGER_MATCH:
 397                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 398                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 399                                 sizeof(int32_t));
 400                 break;
 401         case SR_CONF_PATTERN_MODE:
 402                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 403                 break;
 404         case SR_CONF_LIMIT_SAMPLES:
 405                 if (!sdi)
 406                         return SR_ERR_ARG;
 407                 devc = sdi->priv;
 408                 if (devc->flag_reg & FLAG_RLE)
 409                         return SR_ERR_NA;
 410                 if (devc->max_samples == 0)
 411                         /* Device didn't specify sample memory size in metadata. */
 412                         return SR_ERR_NA;
 413                 /*
 414                  * Channel groups are turned off if no channels in that group are
 415                  * enabled, making more room for samples for the enabled group.
 416                 */
 417                 ols_channel_mask(sdi);
 418                 num_ols_changrp = 0;
 419                 for (i = 0; i < 4; i++) {
 420                         if (devc->channel_mask & (0xff << (i * 8)))
 421                                 num_ols_changrp++;
 422                 }
 423                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 424                 if (num_ols_changrp)
 425                         grange[1] = g_variant_new_uint64(devc->max_samples / num_ols_changrp);
 426                 else
 427                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 428                 *data = g_variant_new_tuple(grange, 2);
 429                 break;
 430         default:
 431                 return SR_ERR_NA;
 432         }
 433
 434         return SR_OK;
 435 }
 436
 437 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 438 {
 439         struct dev_context *devc;
 440         struct sr_serial_dev_inst *serial;
 441         uint8_t cmd, arg[4];
 442
 443         devc = sdi->priv;
 444         serial = sdi->conn;
 445
 446         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 447         arg[0] = devc->trigger_mask[stage] & 0xff;
 448         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 449         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 450         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 451         if (send_longcommand(serial, cmd, arg) != SR_OK)
 452                 return SR_ERR;
 453
 454         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 455         arg[0] = devc->trigger_value[stage] & 0xff;
 456         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 457         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 458         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 459         if (send_longcommand(serial, cmd, arg) != SR_OK)
 460                 return SR_ERR;
 461
 462         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 463         arg[0] = arg[1] = arg[3] = 0x00;
 464         arg[2] = stage;
 465         if (stage == devc->num_stages)
 466                 /* Last stage, fire when this one matches. */
 467                 arg[3] |= TRIGGER_START;
 468         if (send_longcommand(serial, cmd, arg) != SR_OK)
 469                 return SR_ERR;
 470
 471         return SR_OK;
 472 }
 473
 474 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 475                 void *cb_data)
 476 {
 477         struct dev_context *devc;
 478         struct sr_serial_dev_inst *serial;
 479         uint16_t samplecount, readcount, delaycount;
 480         uint8_t ols_changrp_mask, arg[4];
 481         int num_ols_changrp;
 482         int ret, i;
 483
 484         if (sdi->status != SR_ST_ACTIVE)
 485                 return SR_ERR_DEV_CLOSED;
 486
 487         devc = sdi->priv;
 488         serial = sdi->conn;
 489
 490         ols_channel_mask(sdi);
 491
 492         num_ols_changrp = 0;
 493         ols_changrp_mask = 0;
 494         for (i = 0; i < 4; i++) {
 495                 if (devc->channel_mask & (0xff << (i * 8))) {
 496                         ols_changrp_mask |= (1 << i);
 497                         num_ols_changrp++;
 498                 }
 499         }
 500
 501         /*
 502          * Limit readcount to prevent reading past the end of the hardware
 503          * buffer.
 504          */
 505         samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
 506         readcount = samplecount / 4;
 507
 508         /* Rather read too many samples than too few. */
 509         if (samplecount % 4 != 0)
 510                 readcount++;
 511
 512         /* Basic triggers. */
 513         if (ols_convert_trigger(sdi) != SR_OK) {
 514                 sr_err("Failed to configure channels.");
 515                 return SR_ERR;
 516         }
 517         if (devc->num_stages > 0) {
 518                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 519                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 520                 for (i = 0; i <= devc->num_stages; i++) {
 521                         sr_dbg("Setting OLS stage %d trigger.", i);
 522                         if ((ret = set_trigger(sdi, i)) != SR_OK)
 523                                 return ret;
 524                 }
 525         } else {
 526                 /* No triggers configured, force trigger on first stage. */
 527                 sr_dbg("Forcing trigger at stage 0.");
 528                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 529                         return ret;
 530                 delaycount = readcount;
 531         }
 532
 533         /* Samplerate. */
 534         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 535                         devc->cur_samplerate, devc->cur_samplerate_divider);
 536         arg[0] = devc->cur_samplerate_divider & 0xff;
 537         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 538         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 539         arg[3] = 0x00;
 540         if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
 541                 return SR_ERR;
 542
 543         /* Send sample limit and pre/post-trigger capture ratio. */
 544         sr_dbg("Setting sample limit %d, trigger point at %d",
 545                         (readcount - 1) * 4, (delaycount - 1) * 4);
 546         arg[0] = ((readcount - 1) & 0xff);
 547         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 548         arg[2] = ((delaycount - 1) & 0xff);
 549         arg[3] = ((delaycount - 1) & 0xff00) >> 8;
 550         if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
 551                 return SR_ERR;
 552
 553         /* Flag register. */
 554         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 555                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 556                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 557                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 558                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 559                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 560         /*
 561          * Enable/disable OLS channel groups in the flag register according
 562          * to the channel mask. 1 means "disable channel".
 563          */
 564         devc->flag_reg |= ~(ols_changrp_mask << 2) & 0x3c;
 565         arg[0] = devc->flag_reg & 0xff;
 566         arg[1] = devc->flag_reg >> 8;
 567         arg[2] = arg[3] = 0x00;
 568         if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
 569                 return SR_ERR;
 570
 571         /* Start acquisition on the device. */
 572         if (send_shortcommand(serial, CMD_RUN) != SR_OK)
 573                 return SR_ERR;
 574
 575         /* Reset all operational states. */
 576         devc->rle_count = devc->num_transfers = 0;
 577         devc->num_samples = devc->num_bytes = 0;
 578         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 579         memset(devc->sample, 0, 4);
 580
 581         /* Send header packet to the session bus. */
 582         std_session_send_df_header(cb_data, LOG_PREFIX);
 583
 584         serial_source_add(sdi->session, serial, G_IO_IN, -1,
 585                         ols_receive_data, cb_data);
 586
 587         return SR_OK;
 588 }
 589
 590 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 591 {
 592         (void)cb_data;
 593
 594         abort_acquisition(sdi);
 595
 596         return SR_OK;
 597 }
 598
 599 SR_PRIV struct sr_dev_driver ols_driver_info = {
 600         .name = "ols",
 601         .longname = "Openbench Logic Sniffer",
 602         .api_version = 1,
 603         .init = init,
 604         .cleanup = cleanup,
 605         .scan = scan,
 606         .dev_list = dev_list,
 607         .dev_clear = NULL,
 608         .config_get = config_get,
 609         .config_set = config_set,
 610         .config_list = config_list,
 611         .dev_open = std_serial_dev_open,
 612         .dev_close = std_serial_dev_close,
 613         .dev_acquisition_start = dev_acquisition_start,
 614         .dev_acquisition_stop = dev_acquisition_stop,
 615         .priv = NULL,
 616 };