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
  41 #define NUM_PROBES                      32
  42 #define NUM_TRIGGER_STAGES              4
  43 #define TRIGGER_TYPES                   "01"
  44 #define SERIAL_SPEED                    B115200
  45 #define CLOCK_RATE                      100000000
  46
  47 /* Command opcodes */
  48 #define CMD_RESET                       0x00
  49 #define CMD_ID                          0x02
  50 #define CMD_SET_FLAGS                   0x82
  51 #define CMD_SET_DIVIDER                 0x80
  52 #define CMD_RUN                         0x01
  53 #define CMD_CAPTURE_SIZE                0x81
  54 #define CMD_SET_TRIGGER_MASK_0          0xc0
  55 #define CMD_SET_TRIGGER_MASK_1          0xc4
  56 #define CMD_SET_TRIGGER_MASK_2          0xc8
  57 #define CMD_SET_TRIGGER_MASK_3          0xcc
  58 #define CMD_SET_TRIGGER_VALUE_0         0xc1
  59 #define CMD_SET_TRIGGER_VALUE_1         0xc5
  60 #define CMD_SET_TRIGGER_VALUE_2         0xc9
  61 #define CMD_SET_TRIGGER_VALUE_3         0xcd
  62 #define CMD_SET_TRIGGER_CONFIG_0        0xc2
  63 #define CMD_SET_TRIGGER_CONFIG_1        0xc6
  64 #define CMD_SET_TRIGGER_CONFIG_2        0xca
  65 #define CMD_SET_TRIGGER_CONFIG_3        0xce
  66
  67 /* Bitmasks for CMD_FLAGS */
  68 #define FLAG_DEMUX                      0x01
  69 #define FLAG_FILTER                     0x02
  70 #define FLAG_CHANNELGROUP_1             0x04
  71 #define FLAG_CHANNELGROUP_2             0x08
  72 #define FLAG_CHANNELGROUP_3             0x10
  73 #define FLAG_CHANNELGROUP_4             0x20
  74 #define FLAG_CLOCK_EXTERNAL             0x40
  75 #define FLAG_CLOCK_INVERTED             0x80
  76 #define FLAG_RLE                        0x0100
  77
  78 static int capabilities[] = {
  79         HWCAP_LOGIC_ANALYZER,
  80         HWCAP_SAMPLERATE,
  81         HWCAP_CAPTURE_RATIO,
  82         HWCAP_LIMIT_SAMPLES,
  83         0,
  84 };
  85
  86 static struct samplerates samplerates = {
  87         10,
  88         MHZ(200),
  89         1,
  90         0,
  91 };
  92
  93 /* List of struct serial_device_instance */
  94 static GSList *device_instances = NULL;
  95
  96 /* Current state of the flag register */
  97 static uint32_t flag_reg = 0;
  98
  99 static uint64_t cur_samplerate = 0;
 100 static uint64_t limit_samples = 0;
 101 /*
 102  * Pre/post trigger capture ratio, in percentage.
 103  * 0 means no pre-trigger data.
 104  */
 105 static int capture_ratio = 0;
 106 static int trigger_at = -1;
 107 static uint32_t probe_mask = 0xffffffff;
 108 static uint32_t trigger_mask[4] = { 0, 0, 0, 0 };
 109 static uint32_t trigger_value[4] = { 0, 0, 0, 0 };
 110 static int num_stages = 0;
 111
 112 static int send_shortcommand(int fd, uint8_t command)
 113 {
 114         char buf[1];
 115
 116         g_debug("ols: sending cmd 0x%.2x", command);
 117         buf[0] = command;
 118         if (write(fd, buf, 1) != 1)
 119                 return SIGROK_ERR;
 120
 121         return SIGROK_OK;
 122 }
 123
 124 static int send_longcommand(int fd, uint8_t command, uint32_t data)
 125 {
 126         char buf[5];
 127
 128         g_debug("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
 129         buf[0] = command;
 130         buf[1] = (data & 0xff000000) >> 24;
 131         buf[2] = (data & 0xff0000) >> 16;
 132         buf[3] = (data & 0xff00) >> 8;
 133         buf[4] = data & 0xff;
 134         if (write(fd, buf, 5) != 5)
 135                 return SIGROK_ERR;
 136
 137         return SIGROK_OK;
 138 }
 139
 140 static int configure_probes(GSList *probes)
 141 {
 142         struct probe *probe;
 143         GSList *l;
 144         int probe_bit, stage, i;
 145         char *tc;
 146
 147         probe_mask = 0;
 148         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 149                 trigger_mask[i] = 0;
 150                 trigger_value[i] = 0;
 151         }
 152
 153         num_stages = 0;
 154         for (l = probes; l; l = l->next) {
 155                 probe = (struct probe *)l->data;
 156                 if (!probe->enabled)
 157                         continue;
 158
 159                 /*
 160                  * Set up the probe mask for later configuration into the
 161                  * flag register.
 162                  */
 163                 probe_bit = 1 << (probe->index - 1);
 164                 probe_mask |= probe_bit;
 165
 166                 if (!probe->trigger)
 167                         continue;
 168
 169                 /* Configure trigger mask and value. */
 170                 stage = 0;
 171                 for (tc = probe->trigger; tc && *tc; tc++) {
 172                         trigger_mask[stage] |= probe_bit;
 173                         if (*tc == '1')
 174                                 trigger_value[stage] |= probe_bit;
 175                         stage++;
 176                         if (stage > 3)
 177                                 /*
 178                                  * TODO: Only supporting parallel mode, with
 179                                  * up to 4 stages.
 180                                  */
 181                                 return SIGROK_ERR;
 182                 }
 183                 if (stage > num_stages)
 184                         num_stages = stage;
 185         }
 186
 187         return SIGROK_OK;
 188 }
 189
 190 static uint32_t reverse16(uint32_t in)
 191 {
 192         uint32_t out;
 193
 194         out = (in & 0xff) << 8;
 195         out |= (in & 0xff00) >> 8;
 196         out |= (in & 0xff0000) << 8;
 197         out |= (in & 0xff000000) >> 8;
 198
 199         return out;
 200 }
 201
 202 static uint32_t reverse32(uint32_t in)
 203 {
 204         uint32_t out;
 205
 206         out = (in & 0xff) << 24;
 207         out |= (in & 0xff00) << 8;
 208         out |= (in & 0xff0000) >> 8;
 209         out |= (in & 0xff000000) >> 24;
 210
 211         return out;
 212 }
 213
 214 static int hw_init(char *deviceinfo)
 215 {
 216         struct sigrok_device_instance *sdi;
 217         GSList *ports, *l;
 218         GPollFD *fds;
 219         int devcnt, final_devcnt, num_ports, fd, ret, i;
 220         char buf[8], **device_names, **serial_params;
 221
 222         if (deviceinfo)
 223                 ports = g_slist_append(NULL, strdup(deviceinfo));
 224         else
 225                 /* No specific device given, so scan all serial ports. */
 226                 ports = list_serial_ports();
 227
 228         num_ports = g_slist_length(ports);
 229         fds = calloc(1, num_ports * sizeof(GPollFD));
 230         device_names = malloc(num_ports * sizeof(char *));
 231         serial_params = malloc(num_ports * sizeof(char *));
 232         devcnt = 0;
 233         for (l = ports; l; l = l->next) {
 234                 /* The discovery procedure is like this: first send the Reset
 235                  * command (0x00) 5 times, since the device could be anywhere
 236                  * in a 5-byte command. Then send the ID command (0x02).
 237                  * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 238                  * have a match.
 239                  *
 240                  * Since it may take the device a while to respond at 115Kb/s,
 241                  * we do all the sending first, then wait for all of them to
 242                  * respond with g_poll().
 243                  */
 244                 g_message("ols: probing %s...", (char *)l->data);
 245                 fd = serial_open(l->data, O_RDWR | O_NONBLOCK);
 246                 if (fd != -1) {
 247                         serial_params[devcnt] = serial_backup_params(fd);
 248                         serial_set_params(fd, 115200, 8, 0, 1, 2);
 249                         ret = SIGROK_OK;
 250                         for (i = 0; i < 5; i++) {
 251                                 if ((ret = send_shortcommand(fd,
 252                                         CMD_RESET)) != SIGROK_OK) {
 253                                         /* Serial port is not writable. */
 254                                         break;
 255                                 }
 256                         }
 257                         if (ret != SIGROK_OK) {
 258                                 serial_restore_params(fd,
 259                                         serial_params[devcnt]);
 260                                 serial_close(fd);
 261                                 continue;
 262                         }
 263                         send_shortcommand(fd, CMD_ID);
 264                         fds[devcnt].fd = fd;
 265                         fds[devcnt].events = G_IO_IN;
 266                         device_names[devcnt] = strdup(l->data);
 267                         devcnt++;
 268                 }
 269                 free(l->data);
 270         }
 271
 272         /* 2ms isn't enough for reliable transfer with pl2303, let's try 10 */
 273         usleep(10000);
 274
 275         final_devcnt = 0;
 276         g_poll(fds, devcnt, 1);
 277         for (i = 0; i < devcnt; i++) {
 278                 if (fds[i].revents == G_IO_IN) {
 279                         if (read(fds[i].fd, buf, 4) == 4) {
 280                                 if (!strncmp(buf, "1SLO", 4)
 281                                     || !strncmp(buf, "1ALS", 4)) {
 282                                         if (!strncmp(buf, "1SLO", 4))
 283                                                 sdi = sigrok_device_instance_new
 284                                                     (final_devcnt, ST_INACTIVE,
 285                                                      "Openbench",
 286                                                      "Logic Sniffer", "v1.0");
 287                                         else
 288                                                 sdi = sigrok_device_instance_new
 289                                                     (final_devcnt, ST_INACTIVE,
 290                                                      "Openbench", "Logic Sniffer",
 291                                                      "v1.0");
 292                                         sdi->serial = serial_device_instance_new
 293                                             (device_names[i], -1);
 294                                         device_instances =
 295                                             g_slist_append(device_instances, sdi);
 296                                         final_devcnt++;
 297                                         serial_close(fds[i].fd);
 298                                         fds[i].fd = 0;
 299                                 }
 300                         }
 301                         free(device_names[i]);
 302                 }
 303
 304                 if (fds[i].fd != 0) {
 305                         serial_restore_params(fds[i].fd, serial_params[i]);
 306                         serial_close(fds[i].fd);
 307                 }
 308                 free(serial_params[i]);
 309         }
 310
 311         free(fds);
 312         free(device_names);
 313         free(serial_params);
 314         g_slist_free(ports);
 315
 316         cur_samplerate = samplerates.low;
 317
 318         return final_devcnt;
 319 }
 320
 321 static int hw_opendev(int device_index)
 322 {
 323         struct sigrok_device_instance *sdi;
 324
 325         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 326                 return SIGROK_ERR;
 327
 328         sdi->serial->fd = serial_open(sdi->serial->port, O_RDWR);
 329         if (sdi->serial->fd == -1)
 330                 return SIGROK_ERR;
 331
 332         sdi->status = ST_ACTIVE;
 333
 334         return SIGROK_OK;
 335 }
 336
 337 static void hw_closedev(int device_index)
 338 {
 339         struct sigrok_device_instance *sdi;
 340
 341         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 342                 return;
 343
 344         if (sdi->serial->fd != -1) {
 345                 serial_close(sdi->serial->fd);
 346                 sdi->serial->fd = -1;
 347                 sdi->status = ST_INACTIVE;
 348         }
 349 }
 350
 351 static void hw_cleanup(void)
 352 {
 353         GSList *l;
 354         struct sigrok_device_instance *sdi;
 355
 356         /* Properly close all devices. */
 357         for (l = device_instances; l; l = l->next) {
 358                 sdi = l->data;
 359                 if (sdi->serial->fd != -1)
 360                         serial_close(sdi->serial->fd);
 361                 sigrok_device_instance_free(sdi);
 362         }
 363         g_slist_free(device_instances);
 364         device_instances = NULL;
 365 }
 366
 367 static void *hw_get_device_info(int device_index, int device_info_id)
 368 {
 369         struct sigrok_device_instance *sdi;
 370         void *info;
 371
 372         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 373                 return NULL;
 374
 375         info = NULL;
 376         switch (device_info_id) {
 377         case DI_INSTANCE:
 378                 info = sdi;
 379                 break;
 380         case DI_NUM_PROBES:
 381                 info = GINT_TO_POINTER(NUM_PROBES);
 382                 break;
 383         case DI_SAMPLERATES:
 384                 info = &samplerates;
 385                 break;
 386         case DI_TRIGGER_TYPES:
 387                 info = (char *)TRIGGER_TYPES;
 388                 break;
 389         case DI_CUR_SAMPLERATE:
 390                 info = &cur_samplerate;
 391                 break;
 392         }
 393
 394         return info;
 395 }
 396
 397 static int hw_get_status(int device_index)
 398 {
 399         struct sigrok_device_instance *sdi;
 400
 401         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 402                 return ST_NOT_FOUND;
 403
 404         return sdi->status;
 405 }
 406
 407 static int *hw_get_capabilities(void)
 408 {
 409         return capabilities;
 410 }
 411
 412 static int set_configuration_samplerate(struct sigrok_device_instance *sdi,
 413                                         uint64_t samplerate)
 414 {
 415         uint32_t divider;
 416
 417         if (samplerate < samplerates.low || samplerate > samplerates.high)
 418                 return SIGROK_ERR_SAMPLERATE;
 419
 420         if (samplerate > CLOCK_RATE) {
 421                 flag_reg |= FLAG_DEMUX;
 422                 divider = (CLOCK_RATE * 2 / samplerate) - 1;
 423         } else {
 424                 flag_reg &= ~FLAG_DEMUX;
 425                 divider = (CLOCK_RATE / samplerate) - 1;
 426         }
 427
 428         g_message("ols: setting samplerate to %" PRIu64 " Hz (divider %u, demux %s)",
 429                         samplerate, divider, flag_reg & FLAG_DEMUX ? "on" : "off");
 430
 431         if (send_longcommand(sdi->serial->fd, CMD_SET_DIVIDER, reverse32(divider)) != SIGROK_OK)
 432                 return SIGROK_ERR;
 433         cur_samplerate = samplerate;
 434
 435         return SIGROK_OK;
 436 }
 437
 438 static int hw_set_configuration(int device_index, int capability, void *value)
 439 {
 440         struct sigrok_device_instance *sdi;
 441         int ret;
 442         uint64_t *tmp_u64;
 443
 444         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 445                 return SIGROK_ERR;
 446
 447         if (sdi->status != ST_ACTIVE)
 448                 return SIGROK_ERR;
 449
 450         switch (capability) {
 451         case HWCAP_SAMPLERATE:
 452                 tmp_u64 = value;
 453                 ret = set_configuration_samplerate(sdi, *tmp_u64);
 454                 break;
 455         case HWCAP_PROBECONFIG:
 456                 ret = configure_probes((GSList *) value);
 457                 break;
 458         case HWCAP_LIMIT_SAMPLES:
 459                 tmp_u64 = value;
 460                 limit_samples = *tmp_u64;
 461                 g_message("ols: sample limit %" PRIu64, limit_samples);
 462                 ret = SIGROK_OK;
 463                 break;
 464         case HWCAP_CAPTURE_RATIO:
 465                 tmp_u64 = value;
 466                 capture_ratio = *tmp_u64;
 467                 if (capture_ratio < 0 || capture_ratio > 100) {
 468                         capture_ratio = 0;
 469                         ret = SIGROK_ERR;
 470                 } else
 471                         ret = SIGROK_OK;
 472                 break;
 473         default:
 474                 ret = SIGROK_ERR;
 475         }
 476
 477         return ret;
 478 }
 479
 480 static int receive_data(int fd, int revents, void *user_data)
 481 {
 482         static unsigned int num_transfers = 0;
 483         static int num_bytes = 0;
 484         static char last_sample[4] = { 0xff, 0xff, 0xff, 0xff };
 485         static unsigned char sample[4] = { 0, 0, 0, 0 };
 486         static unsigned char tmp_sample[4];
 487         static unsigned char *raw_sample_buf = NULL;
 488         int count, buflen, num_channels, offset, i, j;
 489         struct datafeed_packet packet;
 490         unsigned char byte, *buffer;
 491
 492         if (num_transfers++ == 0) {
 493                 /*
 494                  * First time round, means the device started sending data,
 495                  * and will not stop until done. If it stops sending for
 496                  * longer than it takes to send a byte, that means it's
 497                  * finished. We'll double that to 30ms to be sure...
 498                  */
 499                 source_remove(fd);
 500                 source_add(fd, G_IO_IN, 30, receive_data, user_data);
 501                 raw_sample_buf = malloc(limit_samples * 4);
 502                 /* fill with 1010... for debugging */
 503                 memset(raw_sample_buf, 0x82, limit_samples * 4);
 504         }
 505
 506         num_channels = 0;
 507         for (i = 0x20; i > 0x02; i /= 2) {
 508                 if ((flag_reg & i) == 0)
 509                         num_channels++;
 510         }
 511
 512         if (revents == G_IO_IN
 513             && num_transfers / num_channels <= limit_samples) {
 514                 if (read(fd, &byte, 1) != 1)
 515                         return FALSE;
 516
 517                 sample[num_bytes++] = byte;
 518                 g_debug("ols: received byte 0x%.2x", byte);
 519                 if (num_bytes == num_channels) {
 520                         g_debug("ols: received sample 0x%.*x", num_bytes * 2, (int) *sample);
 521                         /* Got a full sample. */
 522                         if (flag_reg & FLAG_RLE) {
 523                                 /*
 524                                  * In RLE mode -1 should never come in as a
 525                                  * sample, because bit 31 is the "count" flag.
 526                                  * TODO: Endianness may be wrong here, could be
 527                                  * sample[3].
 528                                  */
 529                                 if (sample[0] & 0x80
 530                                     && !(last_sample[0] & 0x80)) {
 531                                         count = (int)(*sample) & 0x7fffffff;
 532                                         buffer = g_malloc(count);
 533                                         buflen = 0;
 534                                         for (i = 0; i < count; i++) {
 535                                                 memcpy(buffer + buflen, last_sample, 4);
 536                                                 buflen += 4;
 537                                         }
 538                                 } else {
 539                                         /*
 540                                          * Just a single sample, next sample
 541                                          * will probably be a count referring
 542                                          * to this -- but this one is still a
 543                                          * part of the stream.
 544                                          */
 545                                         buffer = sample;
 546                                         buflen = 4;
 547                                 }
 548                         } else {
 549                                 /* No compression. */
 550                                 buffer = sample;
 551                                 buflen = 4;
 552                         }
 553
 554                         if (num_channels < 4) {
 555                                 /*
 556                                  * Some channel groups may have been turned
 557                                  * off, to speed up transfer between the
 558                                  * hardware and the PC. Expand that here before
 559                                  * submitting it over the session bus --
 560                                  * whatever is listening on the bus will be
 561                                  * expecting a full 32-bit sample, based on
 562                                  * the number of probes.
 563                                  */
 564                                 j = 0;
 565                                 memset(tmp_sample, 0, 4);
 566                                 for (i = 0; i < 4; i++) {
 567                                         if (((flag_reg >> 2) & (1 << i)) == 0) {
 568                                                 /*
 569                                                  * This channel group was
 570                                                  * enabled, copy from received
 571                                                  * sample.
 572                                                  */
 573                                                 tmp_sample[i] = sample[j++];
 574                                         }
 575                                 }
 576                                 memcpy(sample, tmp_sample, 4);
 577                                 g_debug("ols: full sample 0x%.8x", (int) *sample);
 578                         }
 579
 580                         /* the OLS sends its sample buffer backwards.
 581                          * store it in reverse order here, so we can dump
 582                          * this on the session bus later.
 583                          */
 584                         offset = (limit_samples - num_transfers / num_channels) * 4;
 585                         memcpy(raw_sample_buf + offset, sample, 4);
 586
 587                         if (buffer == sample)
 588                                 memcpy(last_sample, buffer, num_channels);
 589                         else
 590                                 g_free(buffer);
 591
 592                         memset(sample, 0, 4);
 593                         num_bytes = 0;
 594                 }
 595         } else {
 596                 /*
 597                  * This is the main loop telling us a timeout was reached, or
 598                  * we've acquired all the samples we asked for -- we're done.
 599                  * Send the (properly-ordered) buffer to the frontend.
 600                  */
 601                 if (trigger_at != -1) {
 602                         /* a trigger was set up, so we need to tell the frontend
 603                          * about it.
 604                          */
 605                         if (trigger_at > 0) {
 606                                 /* there are pre-trigger samples, send those first */
 607                                 packet.type = DF_LOGIC;
 608                                 packet.length = trigger_at * 4;
 609                                 packet.unitsize = 4;
 610                                 packet.payload = raw_sample_buf;
 611                                 session_bus(user_data, &packet);
 612                         }
 613
 614                         packet.type = DF_TRIGGER;
 615                         packet.length = 0;
 616                         session_bus(user_data, &packet);
 617
 618                         packet.type = DF_LOGIC;
 619                         packet.length = (limit_samples * 4) - (trigger_at * 4);
 620                         packet.unitsize = 4;
 621                         packet.payload = raw_sample_buf + trigger_at * 4;
 622                         session_bus(user_data, &packet);
 623                 } else {
 624                         packet.type = DF_LOGIC;
 625                         packet.length = limit_samples * 4;
 626                         packet.unitsize = 4;
 627                         packet.payload = raw_sample_buf;
 628                         session_bus(user_data, &packet);
 629                 }
 630                 free(raw_sample_buf);
 631
 632                 serial_flush(fd);
 633                 serial_close(fd);
 634                 packet.type = DF_END;
 635                 packet.length = 0;
 636                 session_bus(user_data, &packet);
 637         }
 638
 639         return TRUE;
 640 }
 641
 642 static int hw_start_acquisition(int device_index, gpointer session_device_id)
 643 {
 644         int i;
 645         struct datafeed_packet *packet;
 646         struct datafeed_header *header;
 647         struct sigrok_device_instance *sdi;
 648         uint32_t trigger_config[4];
 649         uint32_t data;
 650         uint16_t readcount, delaycount;
 651         uint8_t changrp_mask;
 652
 653         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 654                 return SIGROK_ERR;
 655
 656         if (sdi->status != ST_ACTIVE)
 657                 return SIGROK_ERR;
 658
 659         readcount = limit_samples / 4;
 660
 661         memset(trigger_config, 0, 16);
 662         trigger_config[num_stages-1] |= 0x08;
 663         if (trigger_mask[0]) {
 664                 delaycount = readcount * (1 - capture_ratio / 100.0);
 665                 trigger_at = (readcount - delaycount) * 4 - num_stages;
 666
 667                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 668                         reverse32(trigger_mask[0])) != SIGROK_OK)
 669                         return SIGROK_ERR;
 670                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 671                         reverse32(trigger_value[0])) != SIGROK_OK)
 672                         return SIGROK_ERR;
 673                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 674                         trigger_config[0]) != SIGROK_OK)
 675                         return SIGROK_ERR;
 676
 677                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_1,
 678                         reverse32(trigger_mask[1])) != SIGROK_OK)
 679                         return SIGROK_ERR;
 680                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_1,
 681                         reverse32(trigger_value[1])) != SIGROK_OK)
 682                         return SIGROK_ERR;
 683                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_1,
 684                         trigger_config[1]) != SIGROK_OK)
 685                         return SIGROK_ERR;
 686
 687                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_2,
 688                         reverse32(trigger_mask[2])) != SIGROK_OK)
 689                         return SIGROK_ERR;
 690                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_2,
 691                         reverse32(trigger_value[2])) != SIGROK_OK)
 692                         return SIGROK_ERR;
 693                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_2,
 694                         trigger_config[2]) != SIGROK_OK)
 695                         return SIGROK_ERR;
 696
 697                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_3,
 698                         reverse32(trigger_mask[3])) != SIGROK_OK)
 699                         return SIGROK_ERR;
 700                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_3,
 701                         reverse32(trigger_value[3])) != SIGROK_OK)
 702                         return SIGROK_ERR;
 703                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_3,
 704                         trigger_config[3]) != SIGROK_OK)
 705                         return SIGROK_ERR;
 706         } else {
 707                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 708                      trigger_mask[0]) != SIGROK_OK)
 709                         return SIGROK_ERR;
 710                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 711                      trigger_value[0]) != SIGROK_OK)
 712                         return SIGROK_ERR;
 713                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 714                      0x00000008) != SIGROK_OK)
 715                         return SIGROK_ERR;
 716                 delaycount = readcount;
 717         }
 718
 719         set_configuration_samplerate(sdi, cur_samplerate);
 720
 721         /* Send sample limit and pre/post-trigger capture ratio. */
 722         data = ((readcount - 1) & 0xffff) << 16;
 723         data |= (delaycount - 1) & 0xffff;
 724         if (send_longcommand(sdi->serial->fd, CMD_CAPTURE_SIZE, reverse16(data)) != SIGROK_OK)
 725                 return SIGROK_ERR;
 726
 727         /*
 728          * Enable/disable channel groups in the flag register according to the
 729          * probe mask.
 730          */
 731         changrp_mask = 0;
 732         for (i = 0; i < 4; i++) {
 733                 if (probe_mask & (0xff << (i * 8)))
 734                         changrp_mask |= (1 << i);
 735         }
 736
 737         /* The flag register wants them here, and 1 means "disable channel". */
 738         flag_reg |= ~(changrp_mask << 2) & 0x3c;
 739         flag_reg |= FLAG_FILTER;
 740         data = flag_reg << 24;
 741         if (send_longcommand(sdi->serial->fd, CMD_SET_FLAGS, data) != SIGROK_OK)
 742                 return SIGROK_ERR;
 743
 744         /* Start acquisition on the device. */
 745         if (send_shortcommand(sdi->serial->fd, CMD_RUN) != SIGROK_OK)
 746                 return SIGROK_ERR;
 747
 748         source_add(sdi->serial->fd, G_IO_IN, -1, receive_data,
 749                    session_device_id);
 750
 751         /* Send header packet to the session bus. */
 752         packet = g_malloc(sizeof(struct datafeed_packet));
 753         header = g_malloc(sizeof(struct datafeed_header));
 754         if (!packet || !header)
 755                 return SIGROK_ERR;
 756         packet->type = DF_HEADER;
 757         packet->length = sizeof(struct datafeed_header);
 758         packet->payload = (unsigned char *)header;
 759         header->feed_version = 1;
 760         gettimeofday(&header->starttime, NULL);
 761         header->samplerate = cur_samplerate;
 762         header->protocol_id = PROTO_RAW;
 763         header->num_logic_probes = NUM_PROBES;
 764         header->num_analog_probes = 0;
 765         session_bus(session_device_id, packet);
 766         g_free(header);
 767         g_free(packet);
 768
 769         return SIGROK_OK;
 770 }
 771
 772 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 773 {
 774         struct datafeed_packet packet;
 775
 776         /* QUICK HACK */
 777         device_index = device_index;
 778
 779         packet.type = DF_END;
 780         packet.length = 0;
 781         session_bus(session_device_id, &packet);
 782 }
 783
 784 struct device_plugin ols_plugin_info = {
 785         "ols",
 786         1,
 787         hw_init,
 788         hw_cleanup,
 789         hw_opendev,
 790         hw_closedev,
 791         hw_get_device_info,
 792         hw_get_status,
 793         hw_get_capabilities,
 794         hw_set_configuration,
 795         hw_start_acquisition,
 796         hw_stop_acquisition,
 797 };