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