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 <config.h>
  21 #include "protocol.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[] = {
  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 };
  78
  79 /* Default supported samplerates, can be overridden by device metadata. */
  80 static const uint64_t samplerates[] = {
  81         SR_HZ(10),
  82         SR_MHZ(200),
  83         SR_HZ(1),
  84 };
  85
  86 #define RESPONSE_DELAY_US (10 * 1000)
  87
  88 SR_PRIV struct sr_dev_driver ols_driver_info;
  89
  90 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  91 {
  92         return std_init(sr_ctx, di, LOG_PREFIX);
  93 }
  94
  95 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  96 {
  97         struct sr_config *src;
  98         struct sr_dev_inst *sdi;
  99         struct drv_context *drvc;
 100         struct sr_serial_dev_inst *serial;
 101         GSList *l, *devices;
 102         int ret;
 103         unsigned int i;
 104         const char *conn, *serialcomm;
 105         char buf[8];
 106
 107         drvc = di->context;
 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)
 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         g_usleep(RESPONSE_DELAY_US);
 156
 157         if (sp_input_waiting(serial->data) == 0) {
 158                 sr_dbg("Didn't get any reply.");
 159                 return NULL;
 160         }
 161
 162         ret = serial_read_blocking(serial, buf, 4, serial_timeout(serial, 4));
 163         if (ret != 4) {
 164                 sr_err("Invalid reply (expected 4 bytes, got %d).", ret);
 165                 return NULL;
 166         }
 167
 168         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4)) {
 169                 sr_err("Invalid reply (expected '1SLO' or '1ALS', got "
 170                        "'%c%c%c%c').", buf[0], buf[1], buf[2], buf[3]);
 171                 return NULL;
 172         }
 173
 174         /* Definitely using the OLS protocol, check if it supports
 175          * the metadata command.
 176          */
 177         send_shortcommand(serial, CMD_METADATA);
 178
 179         g_usleep(RESPONSE_DELAY_US);
 180
 181         if (sp_input_waiting(serial->data) != 0) {
 182                 /* Got metadata. */
 183                 sdi = get_metadata(serial);
 184         } else {
 185                 /* Not an OLS -- some other board that uses the sump protocol. */
 186                 sr_info("Device does not support metadata.");
 187                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 188                 sdi->status = SR_ST_INACTIVE;
 189                 sdi->vendor = g_strdup("Sump");
 190                 sdi->model = g_strdup("Logic Analyzer");
 191                 sdi->version = g_strdup("v1.0");
 192                 sdi->driver = di;
 193                 for (i = 0; i < ARRAY_SIZE(ols_channel_names); i++)
 194                         sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
 195                                         ols_channel_names[i]);
 196                 sdi->priv = ols_dev_new();
 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(const struct sr_dev_driver *di)
 214 {
 215         return ((struct drv_context *)(di->context))->instances;
 216 }
 217
 218 static int cleanup(const struct sr_dev_driver *di)
 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                         ret = SR_ERR;
 296                 else
 297                         ret = SR_OK;
 298                 break;
 299         case SR_CONF_EXTERNAL_CLOCK:
 300                 if (g_variant_get_boolean(data)) {
 301                         sr_info("Enabling external clock.");
 302                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 303                 } else {
 304                         sr_info("Disabled external clock.");
 305                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 306                 }
 307                 ret = SR_OK;
 308                 break;
 309         case SR_CONF_PATTERN_MODE:
 310                 stropt = g_variant_get_string(data, NULL);
 311                 ret = SR_OK;
 312                 flag = 0xffff;
 313                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 314                         sr_info("Disabling test modes.");
 315                         flag = 0x0000;
 316                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 317                         sr_info("Enabling internal test mode.");
 318                         flag = FLAG_INTERNAL_TEST_MODE;
 319                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 320                         sr_info("Enabling external test mode.");
 321                         flag = FLAG_EXTERNAL_TEST_MODE;
 322                 } else {
 323                         ret = SR_ERR;
 324                 }
 325                 if (flag != 0xffff) {
 326                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 327                         devc->flag_reg |= flag;
 328                 }
 329                 break;
 330         case SR_CONF_SWAP:
 331                 if (g_variant_get_boolean(data)) {
 332                         sr_info("Enabling channel swapping.");
 333                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 334                 } else {
 335                         sr_info("Disabling channel swapping.");
 336                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 337                 }
 338                 ret = SR_OK;
 339                 break;
 340
 341         case SR_CONF_RLE:
 342                 if (g_variant_get_boolean(data)) {
 343                         sr_info("Enabling RLE.");
 344                         devc->flag_reg |= FLAG_RLE;
 345                 } else {
 346                         sr_info("Disabling RLE.");
 347                         devc->flag_reg &= ~FLAG_RLE;
 348                 }
 349                 ret = SR_OK;
 350                 break;
 351         default:
 352                 ret = SR_ERR_NA;
 353         }
 354
 355         return ret;
 356 }
 357
 358 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 359                 const struct sr_channel_group *cg)
 360 {
 361         struct dev_context *devc;
 362         GVariant *gvar, *grange[2];
 363         GVariantBuilder gvb;
 364         int num_ols_changrp, i;
 365
 366         (void)cg;
 367
 368         switch (key) {
 369         case SR_CONF_SCAN_OPTIONS:
 370                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 371                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 372                 break;
 373         case SR_CONF_DEVICE_OPTIONS:
 374                 if (!sdi)
 375                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 376                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 377                 else
 378                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 379                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 380                 break;
 381         case SR_CONF_SAMPLERATE:
 382                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 383                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 384                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 385                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 386                 *data = g_variant_builder_end(&gvb);
 387                 break;
 388         case SR_CONF_TRIGGER_MATCH:
 389                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 390                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 391                                 sizeof(int32_t));
 392                 break;
 393         case SR_CONF_PATTERN_MODE:
 394                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 395                 break;
 396         case SR_CONF_LIMIT_SAMPLES:
 397                 if (!sdi)
 398                         return SR_ERR_ARG;
 399                 devc = sdi->priv;
 400                 if (devc->flag_reg & FLAG_RLE)
 401                         return SR_ERR_NA;
 402                 if (devc->max_samples == 0)
 403                         /* Device didn't specify sample memory size in metadata. */
 404                         return SR_ERR_NA;
 405                 /*
 406                  * Channel groups are turned off if no channels in that group are
 407                  * enabled, making more room for samples for the enabled group.
 408                 */
 409                 ols_channel_mask(sdi);
 410                 num_ols_changrp = 0;
 411                 for (i = 0; i < 4; i++) {
 412                         if (devc->channel_mask & (0xff << (i * 8)))
 413                                 num_ols_changrp++;
 414                 }
 415                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 416                 if (num_ols_changrp)
 417                         grange[1] = g_variant_new_uint64(devc->max_samples / num_ols_changrp);
 418                 else
 419                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 420                 *data = g_variant_new_tuple(grange, 2);
 421                 break;
 422         default:
 423                 return SR_ERR_NA;
 424         }
 425
 426         return SR_OK;
 427 }
 428
 429 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 430 {
 431         struct dev_context *devc;
 432         struct sr_serial_dev_inst *serial;
 433         uint8_t cmd, arg[4];
 434
 435         devc = sdi->priv;
 436         serial = sdi->conn;
 437
 438         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 439         arg[0] = devc->trigger_mask[stage] & 0xff;
 440         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 441         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 442         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 443         if (send_longcommand(serial, cmd, arg) != SR_OK)
 444                 return SR_ERR;
 445
 446         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 447         arg[0] = devc->trigger_value[stage] & 0xff;
 448         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 449         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 450         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 451         if (send_longcommand(serial, cmd, arg) != SR_OK)
 452                 return SR_ERR;
 453
 454         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 455         arg[0] = arg[1] = arg[3] = 0x00;
 456         arg[2] = stage;
 457         if (stage == devc->num_stages)
 458                 /* Last stage, fire when this one matches. */
 459                 arg[3] |= TRIGGER_START;
 460         if (send_longcommand(serial, cmd, arg) != SR_OK)
 461                 return SR_ERR;
 462
 463         return SR_OK;
 464 }
 465
 466 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 467                 void *cb_data)
 468 {
 469         struct dev_context *devc;
 470         struct sr_serial_dev_inst *serial;
 471         uint16_t samplecount, readcount, delaycount;
 472         uint8_t ols_changrp_mask, arg[4];
 473         int num_ols_changrp;
 474         int ret, i;
 475
 476         if (sdi->status != SR_ST_ACTIVE)
 477                 return SR_ERR_DEV_CLOSED;
 478
 479         devc = sdi->priv;
 480         serial = sdi->conn;
 481
 482         ols_channel_mask(sdi);
 483
 484         num_ols_changrp = 0;
 485         ols_changrp_mask = 0;
 486         for (i = 0; i < 4; i++) {
 487                 if (devc->channel_mask & (0xff << (i * 8))) {
 488                         ols_changrp_mask |= (1 << i);
 489                         num_ols_changrp++;
 490                 }
 491         }
 492
 493         /*
 494          * Limit readcount to prevent reading past the end of the hardware
 495          * buffer.
 496          */
 497         samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
 498         readcount = samplecount / 4;
 499
 500         /* Rather read too many samples than too few. */
 501         if (samplecount % 4 != 0)
 502                 readcount++;
 503
 504         /* Basic triggers. */
 505         if (ols_convert_trigger(sdi) != SR_OK) {
 506                 sr_err("Failed to configure channels.");
 507                 return SR_ERR;
 508         }
 509         if (devc->num_stages > 0) {
 510                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 511                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 512                 for (i = 0; i <= devc->num_stages; i++) {
 513                         sr_dbg("Setting OLS stage %d trigger.", i);
 514                         if ((ret = set_trigger(sdi, i)) != SR_OK)
 515                                 return ret;
 516                 }
 517         } else {
 518                 /* No triggers configured, force trigger on first stage. */
 519                 sr_dbg("Forcing trigger at stage 0.");
 520                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 521                         return ret;
 522                 delaycount = readcount;
 523         }
 524
 525         /* Samplerate. */
 526         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 527                         devc->cur_samplerate, devc->cur_samplerate_divider);
 528         arg[0] = devc->cur_samplerate_divider & 0xff;
 529         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 530         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 531         arg[3] = 0x00;
 532         if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
 533                 return SR_ERR;
 534
 535         /* Send sample limit and pre/post-trigger capture ratio. */
 536         sr_dbg("Setting sample limit %d, trigger point at %d",
 537                         (readcount - 1) * 4, (delaycount - 1) * 4);
 538         arg[0] = ((readcount - 1) & 0xff);
 539         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 540         arg[2] = ((delaycount - 1) & 0xff);
 541         arg[3] = ((delaycount - 1) & 0xff00) >> 8;
 542         if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
 543                 return SR_ERR;
 544
 545         /* Flag register. */
 546         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 547                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 548                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 549                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 550                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 551                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 552         /*
 553          * Enable/disable OLS channel groups in the flag register according
 554          * to the channel mask. 1 means "disable channel".
 555          */
 556         devc->flag_reg |= ~(ols_changrp_mask << 2) & 0x3c;
 557         arg[0] = devc->flag_reg & 0xff;
 558         arg[1] = devc->flag_reg >> 8;
 559         arg[2] = arg[3] = 0x00;
 560         if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
 561                 return SR_ERR;
 562
 563         /* Start acquisition on the device. */
 564         if (send_shortcommand(serial, CMD_RUN) != SR_OK)
 565                 return SR_ERR;
 566
 567         /* Reset all operational states. */
 568         devc->rle_count = devc->num_transfers = 0;
 569         devc->num_samples = devc->num_bytes = 0;
 570         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 571         memset(devc->sample, 0, 4);
 572
 573         /* Send header packet to the session bus. */
 574         std_session_send_df_header(cb_data, LOG_PREFIX);
 575
 576         /* If the device stops sending for longer than it takes to send a byte,
 577          * that means it's finished. But wait at least 100 ms to be safe.
 578          */
 579         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 580                         ols_receive_data, cb_data);
 581
 582         return SR_OK;
 583 }
 584
 585 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 586 {
 587         (void)cb_data;
 588
 589         abort_acquisition(sdi);
 590
 591         return SR_OK;
 592 }
 593
 594 SR_PRIV struct sr_dev_driver ols_driver_info = {
 595         .name = "ols",
 596         .longname = "Openbench Logic Sniffer",
 597         .api_version = 1,
 598         .init = init,
 599         .cleanup = cleanup,
 600         .scan = scan,
 601         .dev_list = dev_list,
 602         .dev_clear = NULL,
 603         .config_get = config_get,
 604         .config_set = config_set,
 605         .config_list = config_list,
 606         .dev_open = std_serial_dev_open,
 607         .dev_close = std_serial_dev_close,
 608         .dev_acquisition_start = dev_acquisition_start,
 609         .dev_acquisition_stop = dev_acquisition_stop,
 610         .context = NULL,
 611 };