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