hardware/openbench-logic-sniffer/ols.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2010 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 <stdio.h>
  21 #include <stdint.h>
  22 #include <stdlib.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include <unistd.h>
  27 #ifdef _WIN32
  28 #include <windows.h>
  29 #else
  30 #include <termios.h>
  31 #endif
  32 #include <string.h>
  33 #include <sys/time.h>
  34 #include <inttypes.h>
  35 #ifdef _WIN32
  36 /* TODO */
  37 #else
  38 #include <arpa/inet.h>
  39 #endif
  40 #include <glib.h>
  41 #include <sigrok.h>
  42 #include <sigrok-internal.h>
  43
  44 #ifdef _WIN32
  45 #define O_NONBLOCK FIONBIO
  46 #endif
  47
  48 #define NUM_PROBES             32
  49 #define NUM_TRIGGER_STAGES     4
  50 #define TRIGGER_TYPES          "01"
  51 #define SERIAL_SPEED           B115200
  52 #define CLOCK_RATE             SR_MHZ(100)
  53 #define MIN_NUM_SAMPLES        4
  54
  55 /* Command opcodes */
  56 #define CMD_RESET                  0x00
  57 #define CMD_ID                     0x02
  58 #define CMD_SET_FLAGS              0x82
  59 #define CMD_SET_DIVIDER            0x80
  60 #define CMD_RUN                    0x01
  61 #define CMD_CAPTURE_SIZE           0x81
  62 #define CMD_SET_TRIGGER_MASK_0     0xc0
  63 #define CMD_SET_TRIGGER_MASK_1     0xc4
  64 #define CMD_SET_TRIGGER_MASK_2     0xc8
  65 #define CMD_SET_TRIGGER_MASK_3     0xcc
  66 #define CMD_SET_TRIGGER_VALUE_0    0xc1
  67 #define CMD_SET_TRIGGER_VALUE_1    0xc5
  68 #define CMD_SET_TRIGGER_VALUE_2    0xc9
  69 #define CMD_SET_TRIGGER_VALUE_3    0xcd
  70 #define CMD_SET_TRIGGER_CONFIG_0   0xc2
  71 #define CMD_SET_TRIGGER_CONFIG_1   0xc6
  72 #define CMD_SET_TRIGGER_CONFIG_2   0xca
  73 #define CMD_SET_TRIGGER_CONFIG_3   0xce
  74
  75 /* Bitmasks for CMD_FLAGS */
  76 #define FLAG_DEMUX                 0x01
  77 #define FLAG_FILTER                0x02
  78 #define FLAG_CHANNELGROUP_1        0x04
  79 #define FLAG_CHANNELGROUP_2        0x08
  80 #define FLAG_CHANNELGROUP_3        0x10
  81 #define FLAG_CHANNELGROUP_4        0x20
  82 #define FLAG_CLOCK_EXTERNAL        0x40
  83 #define FLAG_CLOCK_INVERTED        0x80
  84 #define FLAG_RLE                   0x0100
  85
  86 static int capabilities[] = {
  87         SR_HWCAP_LOGIC_ANALYZER,
  88         SR_HWCAP_SAMPLERATE,
  89         SR_HWCAP_CAPTURE_RATIO,
  90         SR_HWCAP_LIMIT_SAMPLES,
  91         0,
  92 };
  93
  94 static struct sr_samplerates samplerates = {
  95         SR_HZ(10),
  96         SR_MHZ(200),
  97         SR_HZ(1),
  98         NULL,
  99 };
 100
 101 /* List of struct sr_serial_device_instance */
 102 static GSList *device_instances = NULL;
 103
 104 /* Current state of the flag register */
 105 static uint32_t flag_reg = 0;
 106
 107 static uint64_t cur_samplerate = 0;
 108 static uint64_t limit_samples = 0;
 109 /*
 110  * Pre/post trigger capture ratio, in percentage.
 111  * 0 means no pre-trigger data.
 112  */
 113 static int capture_ratio = 0;
 114 static int trigger_at = -1;
 115 static uint32_t probe_mask = 0xffffffff;
 116 static uint32_t trigger_mask[4] = { 0, 0, 0, 0 };
 117 static uint32_t trigger_value[4] = { 0, 0, 0, 0 };
 118 static int num_stages = 0;
 119
 120 static int send_shortcommand(int fd, uint8_t command)
 121 {
 122         char buf[1];
 123
 124         g_debug("ols: sending cmd 0x%.2x", command);
 125         buf[0] = command;
 126         if (serial_write(fd, buf, 1) != 1)
 127                 return SR_ERR;
 128
 129         return SR_OK;
 130 }
 131
 132 static int send_longcommand(int fd, uint8_t command, uint32_t data)
 133 {
 134         char buf[5];
 135
 136         g_debug("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
 137         buf[0] = command;
 138         buf[1] = (data & 0xff000000) >> 24;
 139         buf[2] = (data & 0xff0000) >> 16;
 140         buf[3] = (data & 0xff00) >> 8;
 141         buf[4] = data & 0xff;
 142         if (serial_write(fd, buf, 5) != 5)
 143                 return SR_ERR;
 144
 145         return SR_OK;
 146 }
 147
 148 static int configure_probes(GSList *probes)
 149 {
 150         struct sr_probe *probe;
 151         GSList *l;
 152         int probe_bit, stage, i;
 153         char *tc;
 154
 155         probe_mask = 0;
 156         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 157                 trigger_mask[i] = 0;
 158                 trigger_value[i] = 0;
 159         }
 160
 161         num_stages = 0;
 162         for (l = probes; l; l = l->next) {
 163                 probe = (struct sr_probe *)l->data;
 164                 if (!probe->enabled)
 165                         continue;
 166
 167                 /*
 168                  * Set up the probe mask for later configuration into the
 169                  * flag register.
 170                  */
 171                 probe_bit = 1 << (probe->index - 1);
 172                 probe_mask |= probe_bit;
 173
 174                 if (!probe->trigger)
 175                         continue;
 176
 177                 /* Configure trigger mask and value. */
 178                 stage = 0;
 179                 for (tc = probe->trigger; tc && *tc; tc++) {
 180                         trigger_mask[stage] |= probe_bit;
 181                         if (*tc == '1')
 182                                 trigger_value[stage] |= probe_bit;
 183                         stage++;
 184                         if (stage > 3)
 185                                 /*
 186                                  * TODO: Only supporting parallel mode, with
 187                                  * up to 4 stages.
 188                                  */
 189                                 return SR_ERR;
 190                 }
 191                 if (stage > num_stages)
 192                         num_stages = stage;
 193         }
 194
 195         return SR_OK;
 196 }
 197
 198 static uint32_t reverse16(uint32_t in)
 199 {
 200         uint32_t out;
 201
 202         out = (in & 0xff) << 8;
 203         out |= (in & 0xff00) >> 8;
 204         out |= (in & 0xff0000) << 8;
 205         out |= (in & 0xff000000) >> 8;
 206
 207         return out;
 208 }
 209
 210 static uint32_t reverse32(uint32_t in)
 211 {
 212         uint32_t out;
 213
 214         out = (in & 0xff) << 24;
 215         out |= (in & 0xff00) << 8;
 216         out |= (in & 0xff0000) >> 8;
 217         out |= (in & 0xff000000) >> 24;
 218
 219         return out;
 220 }
 221
 222 static int hw_init(const char *deviceinfo)
 223 {
 224         struct sr_device_instance *sdi;
 225         GSList *ports, *l;
 226         GPollFD *fds;
 227         int devcnt, final_devcnt, num_ports, fd, ret, i;
 228         char buf[8], **device_names, **serial_params;
 229
 230         if (deviceinfo)
 231                 ports = g_slist_append(NULL, strdup(deviceinfo));
 232         else
 233                 /* No specific device given, so scan all serial ports. */
 234                 ports = list_serial_ports();
 235
 236         num_ports = g_slist_length(ports);
 237         fds = calloc(1, num_ports * sizeof(GPollFD));
 238         device_names = malloc(num_ports * sizeof(char *));
 239         serial_params = malloc(num_ports * sizeof(char *));
 240         devcnt = 0;
 241         for (l = ports; l; l = l->next) {
 242                 /* The discovery procedure is like this: first send the Reset
 243                  * command (0x00) 5 times, since the device could be anywhere
 244                  * in a 5-byte command. Then send the ID command (0x02).
 245                  * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 246                  * have a match.
 247                  *
 248                  * Since it may take the device a while to respond at 115Kb/s,
 249                  * we do all the sending first, then wait for all of them to
 250                  * respond with g_poll().
 251                  */
 252                 g_message("ols: probing %s...", (char *)l->data);
 253                 fd = serial_open(l->data, O_RDWR | O_NONBLOCK);
 254                 if (fd != -1) {
 255                         serial_params[devcnt] = serial_backup_params(fd);
 256                         serial_set_params(fd, 115200, 8, 0, 1, 2);
 257                         ret = SR_OK;
 258                         for (i = 0; i < 5; i++) {
 259                                 if ((ret = send_shortcommand(fd,
 260                                         CMD_RESET)) != SR_OK) {
 261                                         /* Serial port is not writable. */
 262                                         break;
 263                                 }
 264                         }
 265                         if (ret != SR_OK) {
 266                                 serial_restore_params(fd,
 267                                         serial_params[devcnt]);
 268                                 serial_close(fd);
 269                                 continue;
 270                         }
 271                         send_shortcommand(fd, CMD_ID);
 272                         fds[devcnt].fd = fd;
 273                         fds[devcnt].events = G_IO_IN;
 274                         device_names[devcnt] = strdup(l->data);
 275                         devcnt++;
 276                 }
 277                 free(l->data);
 278         }
 279
 280         /* 2ms isn't enough for reliable transfer with pl2303, let's try 10 */
 281         usleep(10000);
 282
 283         final_devcnt = 0;
 284         g_poll(fds, devcnt, 1);
 285         for (i = 0; i < devcnt; i++) {
 286                 if (fds[i].revents == G_IO_IN) {
 287                         if (serial_read(fds[i].fd, buf, 4) == 4) {
 288                                 if (!strncmp(buf, "1SLO", 4)
 289                                     || !strncmp(buf, "1ALS", 4)) {
 290                                         if (!strncmp(buf, "1SLO", 4))
 291                                                 sdi = sr_device_instance_new
 292                                                     (final_devcnt, SR_ST_INACTIVE,
 293                                                      "Openbench",
 294                                                      "Logic Sniffer", "v1.0");
 295                                         else
 296                                                 sdi = sr_device_instance_new
 297                                                     (final_devcnt, SR_ST_INACTIVE,
 298                                                      "Openbench", "Logic Sniffer",
 299                                                      "v1.0");
 300                                         sdi->serial = sr_serial_device_instance_new
 301                                             (device_names[i], -1);
 302                                         device_instances =
 303                                             g_slist_append(device_instances, sdi);
 304                                         final_devcnt++;
 305                                         serial_close(fds[i].fd);
 306                                         fds[i].fd = 0;
 307                                 }
 308                         }
 309                         free(device_names[i]);
 310                 }
 311
 312                 if (fds[i].fd != 0) {
 313                         serial_restore_params(fds[i].fd, serial_params[i]);
 314                         serial_close(fds[i].fd);
 315                 }
 316                 free(serial_params[i]);
 317         }
 318
 319         free(fds);
 320         free(device_names);
 321         free(serial_params);
 322         g_slist_free(ports);
 323
 324         cur_samplerate = SR_KHZ(200);
 325
 326         return final_devcnt;
 327 }
 328
 329 static int hw_opendev(int device_index)
 330 {
 331         struct sr_device_instance *sdi;
 332
 333         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 334                 return SR_ERR;
 335
 336         sdi->serial->fd = serial_open(sdi->serial->port, O_RDWR);
 337         if (sdi->serial->fd == -1)
 338                 return SR_ERR;
 339
 340         sdi->status = SR_ST_ACTIVE;
 341
 342         return SR_OK;
 343 }
 344
 345 static void hw_closedev(int device_index)
 346 {
 347         struct sr_device_instance *sdi;
 348
 349         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 350                 return;
 351
 352         if (sdi->serial->fd != -1) {
 353                 serial_close(sdi->serial->fd);
 354                 sdi->serial->fd = -1;
 355                 sdi->status = SR_ST_INACTIVE;
 356         }
 357 }
 358
 359 static void hw_cleanup(void)
 360 {
 361         GSList *l;
 362         struct sr_device_instance *sdi;
 363
 364         /* Properly close all devices. */
 365         for (l = device_instances; l; l = l->next) {
 366                 sdi = l->data;
 367                 if (sdi->serial->fd != -1)
 368                         serial_close(sdi->serial->fd);
 369                 sr_device_instance_free(sdi);
 370         }
 371         g_slist_free(device_instances);
 372         device_instances = NULL;
 373 }
 374
 375 static void *hw_get_device_info(int device_index, int device_info_id)
 376 {
 377         struct sr_device_instance *sdi;
 378         void *info;
 379
 380         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 381                 return NULL;
 382
 383         info = NULL;
 384         switch (device_info_id) {
 385         case SR_DI_INSTANCE:
 386                 info = sdi;
 387                 break;
 388         case SR_DI_NUM_PROBES:
 389                 info = GINT_TO_POINTER(NUM_PROBES);
 390                 break;
 391         case SR_DI_SAMPLERATES:
 392                 info = &samplerates;
 393                 break;
 394         case SR_DI_TRIGGER_TYPES:
 395                 info = (char *)TRIGGER_TYPES;
 396                 break;
 397         case SR_DI_CUR_SAMPLERATE:
 398                 info = &cur_samplerate;
 399                 break;
 400         }
 401
 402         return info;
 403 }
 404
 405 static int hw_get_status(int device_index)
 406 {
 407         struct sr_device_instance *sdi;
 408
 409         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 410                 return SR_ST_NOT_FOUND;
 411
 412         return sdi->status;
 413 }
 414
 415 static int *hw_get_capabilities(void)
 416 {
 417         return capabilities;
 418 }
 419
 420 static int set_configuration_samplerate(struct sr_device_instance *sdi,
 421                                         uint64_t samplerate)
 422 {
 423         uint32_t divider;
 424
 425         if (samplerate < samplerates.low || samplerate > samplerates.high)
 426                 return SR_ERR_SAMPLERATE;
 427
 428         if (samplerate > CLOCK_RATE) {
 429                 flag_reg |= FLAG_DEMUX;
 430                 divider = (CLOCK_RATE * 2 / samplerate) - 1;
 431         } else {
 432                 flag_reg &= ~FLAG_DEMUX;
 433                 divider = (CLOCK_RATE / samplerate) - 1;
 434         }
 435
 436         g_message("ols: setting samplerate to %" PRIu64 " Hz (divider %u, demux %s)",
 437                         samplerate, divider, flag_reg & FLAG_DEMUX ? "on" : "off");
 438
 439         if (send_longcommand(sdi->serial->fd, CMD_SET_DIVIDER, reverse32(divider)) != SR_OK)
 440                 return SR_ERR;
 441         cur_samplerate = samplerate;
 442
 443         return SR_OK;
 444 }
 445
 446 static int hw_set_configuration(int device_index, int capability, void *value)
 447 {
 448         struct sr_device_instance *sdi;
 449         int ret;
 450         uint64_t *tmp_u64;
 451
 452         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 453                 return SR_ERR;
 454
 455         if (sdi->status != SR_ST_ACTIVE)
 456                 return SR_ERR;
 457
 458         switch (capability) {
 459         case SR_HWCAP_SAMPLERATE:
 460                 tmp_u64 = value;
 461                 ret = set_configuration_samplerate(sdi, *tmp_u64);
 462                 break;
 463         case SR_HWCAP_PROBECONFIG:
 464                 ret = configure_probes((GSList *) value);
 465                 break;
 466         case SR_HWCAP_LIMIT_SAMPLES:
 467                 tmp_u64 = value;
 468                 if (*tmp_u64 < MIN_NUM_SAMPLES)
 469                         return SR_ERR;
 470                 limit_samples = *tmp_u64;
 471                 g_message("ols: sample limit %" PRIu64, limit_samples);
 472                 ret = SR_OK;
 473                 break;
 474         case SR_HWCAP_CAPTURE_RATIO:
 475                 tmp_u64 = value;
 476                 capture_ratio = *tmp_u64;
 477                 if (capture_ratio < 0 || capture_ratio > 100) {
 478                         capture_ratio = 0;
 479                         ret = SR_ERR;
 480                 } else
 481                         ret = SR_OK;
 482                 break;
 483         default:
 484                 ret = SR_ERR;
 485         }
 486
 487         return ret;
 488 }
 489
 490 static int receive_data(int fd, int revents, void *user_data)
 491 {
 492         static unsigned int num_transfers = 0;
 493         static int num_bytes = 0;
 494         static char last_sample[4] = { 0xff, 0xff, 0xff, 0xff };
 495         static unsigned char sample[4] = { 0, 0, 0, 0 };
 496         static unsigned char tmp_sample[4];
 497         static unsigned char *raw_sample_buf = NULL;
 498         int count, buflen, num_channels, offset, i, j;
 499         struct sr_datafeed_packet packet;
 500         unsigned char byte, *buffer;
 501
 502         if (num_transfers++ == 0) {
 503                 /*
 504                  * First time round, means the device started sending data,
 505                  * and will not stop until done. If it stops sending for
 506                  * longer than it takes to send a byte, that means it's
 507                  * finished. We'll double that to 30ms to be sure...
 508                  */
 509                 sr_source_remove(fd);
 510                 sr_source_add(fd, G_IO_IN, 30, receive_data, user_data);
 511                 raw_sample_buf = malloc(limit_samples * 4);
 512                 /* fill with 1010... for debugging */
 513                 memset(raw_sample_buf, 0x82, limit_samples * 4);
 514         }
 515
 516         num_channels = 0;
 517         for (i = 0x20; i > 0x02; i /= 2) {
 518                 if ((flag_reg & i) == 0)
 519                         num_channels++;
 520         }
 521
 522         if (revents == G_IO_IN
 523             && num_transfers / num_channels <= limit_samples) {
 524                 if (serial_read(fd, &byte, 1) != 1)
 525                         return FALSE;
 526
 527                 sample[num_bytes++] = byte;
 528                 g_debug("ols: received byte 0x%.2x", byte);
 529                 if (num_bytes == num_channels) {
 530                         g_debug("ols: received sample 0x%.*x", num_bytes * 2, (int) *sample);
 531                         /* Got a full sample. */
 532                         if (flag_reg & FLAG_RLE) {
 533                                 /*
 534                                  * In RLE mode -1 should never come in as a
 535                                  * sample, because bit 31 is the "count" flag.
 536                                  * TODO: Endianness may be wrong here, could be
 537                                  * sample[3].
 538                                  */
 539                                 if (sample[0] & 0x80
 540                                     && !(last_sample[0] & 0x80)) {
 541                                         count = (int)(*sample) & 0x7fffffff;
 542                                         buffer = g_malloc(count);
 543                                         buflen = 0;
 544                                         for (i = 0; i < count; i++) {
 545                                                 memcpy(buffer + buflen, last_sample, 4);
 546                                                 buflen += 4;
 547                                         }
 548                                 } else {
 549                                         /*
 550                                          * Just a single sample, next sample
 551                                          * will probably be a count referring
 552                                          * to this -- but this one is still a
 553                                          * part of the stream.
 554                                          */
 555                                         buffer = sample;
 556                                         buflen = 4;
 557                                 }
 558                         } else {
 559                                 /* No compression. */
 560                                 buffer = sample;
 561                                 buflen = 4;
 562                         }
 563
 564                         if (num_channels < 4) {
 565                                 /*
 566                                  * Some channel groups may have been turned
 567                                  * off, to speed up transfer between the
 568                                  * hardware and the PC. Expand that here before
 569                                  * submitting it over the session bus --
 570                                  * whatever is listening on the bus will be
 571                                  * expecting a full 32-bit sample, based on
 572                                  * the number of probes.
 573                                  */
 574                                 j = 0;
 575                                 memset(tmp_sample, 0, 4);
 576                                 for (i = 0; i < 4; i++) {
 577                                         if (((flag_reg >> 2) & (1 << i)) == 0) {
 578                                                 /*
 579                                                  * This channel group was
 580                                                  * enabled, copy from received
 581                                                  * sample.
 582                                                  */
 583                                                 tmp_sample[i] = sample[j++];
 584                                         }
 585                                 }
 586                                 memcpy(sample, tmp_sample, 4);
 587                                 g_debug("ols: full sample 0x%.8x", (int) *sample);
 588                         }
 589
 590                         /* the OLS sends its sample buffer backwards.
 591                          * store it in reverse order here, so we can dump
 592                          * this on the session bus later.
 593                          */
 594                         offset = (limit_samples - num_transfers / num_channels) * 4;
 595                         memcpy(raw_sample_buf + offset, sample, 4);
 596
 597                         if (buffer == sample)
 598                                 memcpy(last_sample, buffer, num_channels);
 599                         else
 600                                 g_free(buffer);
 601
 602                         memset(sample, 0, 4);
 603                         num_bytes = 0;
 604                 }
 605         } else {
 606                 /*
 607                  * This is the main loop telling us a timeout was reached, or
 608                  * we've acquired all the samples we asked for -- we're done.
 609                  * Send the (properly-ordered) buffer to the frontend.
 610                  */
 611                 if (trigger_at != -1) {
 612                         /* a trigger was set up, so we need to tell the frontend
 613                          * about it.
 614                          */
 615                         if (trigger_at > 0) {
 616                                 /* there are pre-trigger samples, send those first */
 617                                 packet.type = SR_DF_LOGIC;
 618                                 packet.length = trigger_at * 4;
 619                                 packet.unitsize = 4;
 620                                 packet.payload = raw_sample_buf;
 621                                 sr_session_bus(user_data, &packet);
 622                         }
 623
 624                         packet.type = SR_DF_TRIGGER;
 625                         packet.length = 0;
 626                         sr_session_bus(user_data, &packet);
 627
 628                         packet.type = SR_DF_LOGIC;
 629                         packet.length = (limit_samples * 4) - (trigger_at * 4);
 630                         packet.unitsize = 4;
 631                         packet.payload = raw_sample_buf + trigger_at * 4;
 632                         sr_session_bus(user_data, &packet);
 633                 } else {
 634                         packet.type = SR_DF_LOGIC;
 635                         packet.length = limit_samples * 4;
 636                         packet.unitsize = 4;
 637                         packet.payload = raw_sample_buf;
 638                         sr_session_bus(user_data, &packet);
 639                 }
 640                 free(raw_sample_buf);
 641
 642                 serial_flush(fd);
 643                 serial_close(fd);
 644                 packet.type = SR_DF_END;
 645                 packet.length = 0;
 646                 sr_session_bus(user_data, &packet);
 647         }
 648
 649         return TRUE;
 650 }
 651
 652 static int hw_start_acquisition(int device_index, gpointer session_device_id)
 653 {
 654         int i;
 655         struct sr_datafeed_packet *packet;
 656         struct sr_datafeed_header *header;
 657         struct sr_device_instance *sdi;
 658         uint32_t trigger_config[4];
 659         uint32_t data;
 660         uint16_t readcount, delaycount;
 661         uint8_t changrp_mask;
 662
 663         if (!(sdi = sr_get_device_instance(device_instances, device_index)))
 664                 return SR_ERR;
 665
 666         if (sdi->status != SR_ST_ACTIVE)
 667                 return SR_ERR;
 668
 669         readcount = limit_samples / 4;
 670
 671         memset(trigger_config, 0, 16);
 672         trigger_config[num_stages-1] |= 0x08;
 673         if (trigger_mask[0]) {
 674                 delaycount = readcount * (1 - capture_ratio / 100.0);
 675                 trigger_at = (readcount - delaycount) * 4 - num_stages;
 676
 677                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 678                         reverse32(trigger_mask[0])) != SR_OK)
 679                         return SR_ERR;
 680                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 681                         reverse32(trigger_value[0])) != SR_OK)
 682                         return SR_ERR;
 683                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 684                         trigger_config[0]) != SR_OK)
 685                         return SR_ERR;
 686
 687                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_1,
 688                         reverse32(trigger_mask[1])) != SR_OK)
 689                         return SR_ERR;
 690                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_1,
 691                         reverse32(trigger_value[1])) != SR_OK)
 692                         return SR_ERR;
 693                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_1,
 694                         trigger_config[1]) != SR_OK)
 695                         return SR_ERR;
 696
 697                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_2,
 698                         reverse32(trigger_mask[2])) != SR_OK)
 699                         return SR_ERR;
 700                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_2,
 701                         reverse32(trigger_value[2])) != SR_OK)
 702                         return SR_ERR;
 703                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_2,
 704                         trigger_config[2]) != SR_OK)
 705                         return SR_ERR;
 706
 707                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_3,
 708                         reverse32(trigger_mask[3])) != SR_OK)
 709                         return SR_ERR;
 710                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_3,
 711                         reverse32(trigger_value[3])) != SR_OK)
 712                         return SR_ERR;
 713                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_3,
 714                         trigger_config[3]) != SR_OK)
 715                         return SR_ERR;
 716         } else {
 717                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 718                      trigger_mask[0]) != SR_OK)
 719                         return SR_ERR;
 720                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 721                      trigger_value[0]) != SR_OK)
 722                         return SR_ERR;
 723                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 724                      0x00000008) != SR_OK)
 725                         return SR_ERR;
 726                 delaycount = readcount;
 727         }
 728
 729         set_configuration_samplerate(sdi, cur_samplerate);
 730
 731         /* Send sample limit and pre/post-trigger capture ratio. */
 732         data = ((readcount - 1) & 0xffff) << 16;
 733         data |= (delaycount - 1) & 0xffff;
 734         if (send_longcommand(sdi->serial->fd, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
 735                 return SR_ERR;
 736
 737         /*
 738          * Enable/disable channel groups in the flag register according to the
 739          * probe mask.
 740          */
 741         changrp_mask = 0;
 742         for (i = 0; i < 4; i++) {
 743                 if (probe_mask & (0xff << (i * 8)))
 744                         changrp_mask |= (1 << i);
 745         }
 746
 747         /* The flag register wants them here, and 1 means "disable channel". */
 748         flag_reg |= ~(changrp_mask << 2) & 0x3c;
 749         flag_reg |= FLAG_FILTER;
 750         data = flag_reg << 24;
 751         if (send_longcommand(sdi->serial->fd, CMD_SET_FLAGS, data) != SR_OK)
 752                 return SR_ERR;
 753
 754         /* Start acquisition on the device. */
 755         if (send_shortcommand(sdi->serial->fd, CMD_RUN) != SR_OK)
 756                 return SR_ERR;
 757
 758         sr_source_add(sdi->serial->fd, G_IO_IN, -1, receive_data,
 759                       session_device_id);
 760
 761         /* Send header packet to the session bus. */
 762         packet = g_malloc(sizeof(struct sr_datafeed_packet));
 763         header = g_malloc(sizeof(struct sr_datafeed_header));
 764         if (!packet || !header)
 765                 return SR_ERR;
 766         packet->type = SR_DF_HEADER;
 767         packet->length = sizeof(struct sr_datafeed_header);
 768         packet->payload = (unsigned char *)header;
 769         header->feed_version = 1;
 770         gettimeofday(&header->starttime, NULL);
 771         header->samplerate = cur_samplerate;
 772         header->protocol_id = SR_PROTO_RAW;
 773         header->num_logic_probes = NUM_PROBES;
 774         header->num_analog_probes = 0;
 775         sr_session_bus(session_device_id, packet);
 776         g_free(header);
 777         g_free(packet);
 778
 779         return SR_OK;
 780 }
 781
 782 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 783 {
 784         struct sr_datafeed_packet packet;
 785
 786         /* Avoid compiler warnings. */
 787         device_index = device_index;
 788
 789         packet.type = SR_DF_END;
 790         packet.length = 0;
 791         sr_session_bus(session_device_id, &packet);
 792 }
 793
 794 struct sr_device_plugin ols_plugin_info = {
 795         "ols",
 796         "Openbench Logic Sniffer",
 797         1,
 798         hw_init,
 799         hw_cleanup,
 800         hw_opendev,
 801         hw_closedev,
 802         hw_get_device_info,
 803         hw_get_status,
 804         hw_get_capabilities,
 805         hw_set_configuration,
 806         hw_start_acquisition,
 807         hw_stop_acquisition,
 808 };