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