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         GPollFD probefd;
 104         GSList *l, *devices;
 105         int ret, i;
 106         const char *conn, *serialcomm;
 107         char buf[8];
 108
 109         drvc = di->priv;
 110
 111         devices = NULL;
 112
 113         conn = serialcomm = NULL;
 114         for (l = options; l; l = l->next) {
 115                 src = l->data;
 116                 switch (src->key) {
 117                 case SR_CONF_CONN:
 118                         conn = g_variant_get_string(src->data, NULL);
 119                         break;
 120                 case SR_CONF_SERIALCOMM:
 121                         serialcomm = g_variant_get_string(src->data, NULL);
 122                         break;
 123                 }
 124         }
 125         if (!conn)
 126                 return NULL;
 127
 128         if (serialcomm == NULL)
 129                 serialcomm = SERIALCOMM;
 130
 131         serial = sr_serial_dev_inst_new(conn, serialcomm);
 132
 133         /* The discovery procedure is like this: first send the Reset
 134          * command (0x00) 5 times, since the device could be anywhere
 135          * in a 5-byte command. Then send the ID command (0x02).
 136          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 137          * have a match.
 138          */
 139         sr_info("Probing %s.", conn);
 140         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 141                 return NULL;
 142
 143         ret = SR_OK;
 144         for (i = 0; i < 5; i++) {
 145                 if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
 146                         sr_err("Port %s is not writable.", conn);
 147                         break;
 148                 }
 149         }
 150         if (ret != SR_OK) {
 151                 serial_close(serial);
 152                 sr_err("Could not use port %s. Quitting.", conn);
 153                 return NULL;
 154         }
 155         send_shortcommand(serial, CMD_ID);
 156
 157         /* Wait 10ms for a response. */
 158         g_usleep(10000);
 159
 160         if (sp_input_waiting(serial->data) == 0) {
 161                 sr_dbg("Didn't get any reply.");
 162                 return NULL;
 163         }
 164
 165         ret = serial_read_blocking(serial, buf, 4, serial_timeout(serial, 4));
 166         if (ret != 4) {
 167                 sr_err("Invalid reply (expected 4 bytes, got %d).", ret);
 168                 return NULL;
 169         }
 170
 171         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4)) {
 172                 sr_err("Invalid reply (expected '1SLO' or '1ALS', got "
 173                        "'%c%c%c%c').", buf[0], buf[1], buf[2], buf[3]);
 174                 return NULL;
 175         }
 176
 177         /* Definitely using the OLS protocol, check if it supports
 178          * the metadata command.
 179          */
 180         send_shortcommand(serial, CMD_METADATA);
 181
 182         /* Wait 10ms for a response. */
 183         g_usleep(10000);
 184
 185         if (sp_input_waiting(serial->data) != 0) {
 186                 /* Got metadata. */
 187                 sdi = get_metadata(serial);
 188                 devc = sdi->priv;
 189         } else {
 190                 /* Not an OLS -- some other board that uses the sump protocol. */
 191                 sr_info("Device does not support metadata.");
 192                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 193                 sdi->status = SR_ST_INACTIVE;
 194                 sdi->vendor = g_strdup("Sump");
 195                 sdi->model = g_strdup("Logic Analyzer");
 196                 sdi->version = g_strdup("v1.0");
 197                 sdi->driver = di;
 198                 for (i = 0; i < 32; i++) {
 199                         ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
 200                                         ols_channel_names[i]);
 201                         sdi->channels = g_slist_append(sdi->channels, ch);
 202                 }
 203                 devc = ols_dev_new();
 204                 sdi->priv = devc;
 205         }
 206         /* Configure samplerate and divider. */
 207         if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 208                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 209                                 DEFAULT_SAMPLERATE);
 210         sdi->inst_type = SR_INST_SERIAL;
 211         sdi->conn = serial;
 212
 213         drvc->instances = g_slist_append(drvc->instances, sdi);
 214         devices = g_slist_append(devices, sdi);
 215
 216         serial_close(serial);
 217
 218         return devices;
 219 }
 220
 221 static GSList *dev_list(void)
 222 {
 223         return ((struct drv_context *)(di->priv))->instances;
 224 }
 225
 226 static int cleanup(void)
 227 {
 228         return std_dev_clear(di, NULL);
 229 }
 230
 231 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 232                 const struct sr_channel_group *cg)
 233 {
 234         struct dev_context *devc;
 235
 236         (void)cg;
 237
 238         if (!sdi)
 239                 return SR_ERR_ARG;
 240
 241         devc = sdi->priv;
 242         switch (key) {
 243         case SR_CONF_SAMPLERATE:
 244                 *data = g_variant_new_uint64(devc->cur_samplerate);
 245                 break;
 246         case SR_CONF_CAPTURE_RATIO:
 247                 *data = g_variant_new_uint64(devc->capture_ratio);
 248                 break;
 249         case SR_CONF_LIMIT_SAMPLES:
 250                 *data = g_variant_new_uint64(devc->limit_samples);
 251                 break;
 252         case SR_CONF_PATTERN_MODE:
 253                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 254                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 255                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 256                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 257                 else
 258                         *data = g_variant_new_string(STR_PATTERN_NONE);
 259                 break;
 260         case SR_CONF_RLE:
 261                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 262                 break;
 263         default:
 264                 return SR_ERR_NA;
 265         }
 266
 267         return SR_OK;
 268 }
 269
 270 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 271                 const struct sr_channel_group *cg)
 272 {
 273         struct dev_context *devc;
 274         uint16_t flag;
 275         uint64_t tmp_u64;
 276         int ret;
 277         const char *stropt;
 278
 279         (void)cg;
 280
 281         if (sdi->status != SR_ST_ACTIVE)
 282                 return SR_ERR_DEV_CLOSED;
 283
 284         devc = sdi->priv;
 285
 286         switch (key) {
 287         case SR_CONF_SAMPLERATE:
 288                 tmp_u64 = g_variant_get_uint64(data);
 289                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 290                         return SR_ERR_SAMPLERATE;
 291                 ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
 292                 break;
 293         case SR_CONF_LIMIT_SAMPLES:
 294                 tmp_u64 = g_variant_get_uint64(data);
 295                 if (tmp_u64 < MIN_NUM_SAMPLES)
 296                         return SR_ERR;
 297                 devc->limit_samples = tmp_u64;
 298                 ret = SR_OK;
 299                 break;
 300         case SR_CONF_CAPTURE_RATIO:
 301                 devc->capture_ratio = g_variant_get_uint64(data);
 302                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 303                         devc->capture_ratio = 0;
 304                         ret = SR_ERR;
 305                 } else
 306                         ret = SR_OK;
 307                 break;
 308         case SR_CONF_EXTERNAL_CLOCK:
 309                 if (g_variant_get_boolean(data)) {
 310                         sr_info("Enabling external clock.");
 311                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 312                 } else {
 313                         sr_info("Disabled external clock.");
 314                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 315                 }
 316                 ret = SR_OK;
 317                 break;
 318         case SR_CONF_PATTERN_MODE:
 319                 stropt = g_variant_get_string(data, NULL);
 320                 ret = SR_OK;
 321                 flag = 0xffff;
 322                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 323                         sr_info("Disabling test modes.");
 324                         flag = 0x0000;
 325                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 326                         sr_info("Enabling internal test mode.");
 327                         flag = FLAG_INTERNAL_TEST_MODE;
 328                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 329                         sr_info("Enabling external test mode.");
 330                         flag = FLAG_EXTERNAL_TEST_MODE;
 331                 } else {
 332                         ret = SR_ERR;
 333                 }
 334                 if (flag != 0xffff) {
 335                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 336                         devc->flag_reg |= flag;
 337                 }
 338                 break;
 339         case SR_CONF_SWAP:
 340                 if (g_variant_get_boolean(data)) {
 341                         sr_info("Enabling channel swapping.");
 342                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 343                 } else {
 344                         sr_info("Disabling channel swapping.");
 345                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 346                 }
 347                 ret = SR_OK;
 348                 break;
 349
 350         case SR_CONF_RLE:
 351                 if (g_variant_get_boolean(data)) {
 352                         sr_info("Enabling RLE.");
 353                         devc->flag_reg |= FLAG_RLE;
 354                 } else {
 355                         sr_info("Disabling RLE.");
 356                         devc->flag_reg &= ~FLAG_RLE;
 357                 }
 358                 ret = SR_OK;
 359                 break;
 360         default:
 361                 ret = SR_ERR_NA;
 362         }
 363
 364         return ret;
 365 }
 366
 367 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 368                 const struct sr_channel_group *cg)
 369 {
 370         struct dev_context *devc;
 371         GVariant *gvar, *grange[2];
 372         GVariantBuilder gvb;
 373         int num_ols_changrp, i;
 374
 375         (void)cg;
 376
 377         switch (key) {
 378         case SR_CONF_SCAN_OPTIONS:
 379                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 380                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 381                 break;
 382         case SR_CONF_DEVICE_OPTIONS:
 383                 if (!sdi)
 384                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 385                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 386                 else
 387                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 388                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 389                 break;
 390         case SR_CONF_SAMPLERATE:
 391                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 392                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 393                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 394                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 395                 *data = g_variant_builder_end(&gvb);
 396                 break;
 397         case SR_CONF_TRIGGER_MATCH:
 398                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 399                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 400                                 sizeof(int32_t));
 401                 break;
 402         case SR_CONF_PATTERN_MODE:
 403                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 404                 break;
 405         case SR_CONF_LIMIT_SAMPLES:
 406                 if (!sdi)
 407                         return SR_ERR_ARG;
 408                 devc = sdi->priv;
 409                 if (devc->flag_reg & FLAG_RLE)
 410                         return SR_ERR_NA;
 411                 if (devc->max_samples == 0)
 412                         /* Device didn't specify sample memory size in metadata. */
 413                         return SR_ERR_NA;
 414                 /*
 415                  * Channel groups are turned off if no channels in that group are
 416                  * enabled, making more room for samples for the enabled group.
 417                 */
 418                 ols_channel_mask(sdi);
 419                 num_ols_changrp = 0;
 420                 for (i = 0; i < 4; i++) {
 421                         if (devc->channel_mask & (0xff << (i * 8)))
 422                                 num_ols_changrp++;
 423                 }
 424                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 425                 if (num_ols_changrp)
 426                         grange[1] = g_variant_new_uint64(devc->max_samples / num_ols_changrp);
 427                 else
 428                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 429                 *data = g_variant_new_tuple(grange, 2);
 430                 break;
 431         default:
 432                 return SR_ERR_NA;
 433         }
 434
 435         return SR_OK;
 436 }
 437
 438 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 439 {
 440         struct dev_context *devc;
 441         struct sr_serial_dev_inst *serial;
 442         uint8_t cmd, arg[4];
 443
 444         devc = sdi->priv;
 445         serial = sdi->conn;
 446
 447         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 448         arg[0] = devc->trigger_mask[stage] & 0xff;
 449         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 450         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 451         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 452         if (send_longcommand(serial, cmd, arg) != SR_OK)
 453                 return SR_ERR;
 454
 455         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 456         arg[0] = devc->trigger_value[stage] & 0xff;
 457         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 458         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 459         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 460         if (send_longcommand(serial, cmd, arg) != SR_OK)
 461                 return SR_ERR;
 462
 463         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 464         arg[0] = arg[1] = arg[3] = 0x00;
 465         arg[2] = stage;
 466         if (stage == devc->num_stages)
 467                 /* Last stage, fire when this one matches. */
 468                 arg[3] |= TRIGGER_START;
 469         if (send_longcommand(serial, cmd, arg) != SR_OK)
 470                 return SR_ERR;
 471
 472         return SR_OK;
 473 }
 474
 475 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 476                 void *cb_data)
 477 {
 478         struct dev_context *devc;
 479         struct sr_serial_dev_inst *serial;
 480         uint16_t samplecount, readcount, delaycount;
 481         uint8_t ols_changrp_mask, arg[4];
 482         int num_ols_changrp;
 483         int ret, i;
 484
 485         if (sdi->status != SR_ST_ACTIVE)
 486                 return SR_ERR_DEV_CLOSED;
 487
 488         devc = sdi->priv;
 489         serial = sdi->conn;
 490
 491         ols_channel_mask(sdi);
 492
 493         num_ols_changrp = 0;
 494         ols_changrp_mask = 0;
 495         for (i = 0; i < 4; i++) {
 496                 if (devc->channel_mask & (0xff << (i * 8))) {
 497                         ols_changrp_mask |= (1 << i);
 498                         num_ols_changrp++;
 499                 }
 500         }
 501
 502         /*
 503          * Limit readcount to prevent reading past the end of the hardware
 504          * buffer.
 505          */
 506         samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
 507         readcount = samplecount / 4;
 508
 509         /* Rather read too many samples than too few. */
 510         if (samplecount % 4 != 0)
 511                 readcount++;
 512
 513         /* Basic triggers. */
 514         if (ols_convert_trigger(sdi) != SR_OK) {
 515                 sr_err("Failed to configure channels.");
 516                 return SR_ERR;
 517         }
 518         if (devc->num_stages > 0) {
 519                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 520                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 521                 for (i = 0; i <= devc->num_stages; i++) {
 522                         sr_dbg("Setting OLS stage %d trigger.", i);
 523                         if ((ret = set_trigger(sdi, i)) != SR_OK)
 524                                 return ret;
 525                 }
 526         } else {
 527                 /* No triggers configured, force trigger on first stage. */
 528                 sr_dbg("Forcing trigger at stage 0.");
 529                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 530                         return ret;
 531                 delaycount = readcount;
 532         }
 533
 534         /* Samplerate. */
 535         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 536                         devc->cur_samplerate, devc->cur_samplerate_divider);
 537         arg[0] = devc->cur_samplerate_divider & 0xff;
 538         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 539         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 540         arg[3] = 0x00;
 541         if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
 542                 return SR_ERR;
 543
 544         /* Send sample limit and pre/post-trigger capture ratio. */
 545         sr_dbg("Setting sample limit %d, trigger point at %d",
 546                         (readcount - 1) * 4, (delaycount - 1) * 4);
 547         arg[0] = ((readcount - 1) & 0xff);
 548         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 549         arg[2] = ((delaycount - 1) & 0xff);
 550         arg[3] = ((delaycount - 1) & 0xff00) >> 8;
 551         if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
 552                 return SR_ERR;
 553
 554         /* Flag register. */
 555         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 556                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 557                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 558                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 559                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 560                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 561         /*
 562          * Enable/disable OLS channel groups in the flag register according
 563          * to the channel mask. 1 means "disable channel".
 564          */
 565         devc->flag_reg |= ~(ols_changrp_mask << 2) & 0x3c;
 566         arg[0] = devc->flag_reg & 0xff;
 567         arg[1] = devc->flag_reg >> 8;
 568         arg[2] = arg[3] = 0x00;
 569         if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
 570                 return SR_ERR;
 571
 572         /* Start acquisition on the device. */
 573         if (send_shortcommand(serial, CMD_RUN) != SR_OK)
 574                 return SR_ERR;
 575
 576         /* Reset all operational states. */
 577         devc->rle_count = devc->num_transfers = 0;
 578         devc->num_samples = devc->num_bytes = 0;
 579         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 580         memset(devc->sample, 0, 4);
 581
 582         /* Send header packet to the session bus. */
 583         std_session_send_df_header(cb_data, LOG_PREFIX);
 584
 585         serial_source_add(sdi->session, serial, G_IO_IN, -1,
 586                         ols_receive_data, cb_data);
 587
 588         return SR_OK;
 589 }
 590
 591 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 592 {
 593         (void)cb_data;
 594
 595         abort_acquisition(sdi);
 596
 597         return SR_OK;
 598 }
 599
 600 SR_PRIV struct sr_dev_driver ols_driver_info = {
 601         .name = "ols",
 602         .longname = "Openbench Logic Sniffer",
 603         .api_version = 1,
 604         .init = init,
 605         .cleanup = cleanup,
 606         .scan = scan,
 607         .dev_list = dev_list,
 608         .dev_clear = NULL,
 609         .config_get = config_get,
 610         .config_set = config_set,
 611         .config_list = config_list,
 612         .dev_open = std_serial_dev_open,
 613         .dev_close = std_serial_dev_close,
 614         .dev_acquisition_start = dev_acquisition_start,
 615         .dev_acquisition_stop = dev_acquisition_stop,
 616         .priv = NULL,
 617 };