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