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 #include <termios.h>
  28 #include <string.h>
  29 #include <sys/time.h>
  30 #include <inttypes.h>
  31 #include <arpa/inet.h>
  32 #include <glib.h>
  33 #include <sigrok.h>
  34
  35 #define NUM_PROBES                      32
  36 #define NUM_TRIGGER_STAGES              4
  37 #define TRIGGER_TYPES                   "01"
  38 #define SERIAL_SPEED                    B115200
  39 /* TODO: SERIAL_ bits, parity, stop bit */
  40 #define CLOCK_RATE                      100000000
  41
  42 /* Command opcodes */
  43 #define CMD_RESET                       0x00
  44 #define CMD_ID                          0x02
  45 #define CMD_SET_FLAGS                   0x82
  46 #define CMD_SET_DIVIDER                 0x80
  47 #define CMD_RUN                         0x01
  48 #define CMD_CAPTURE_SIZE                0x81
  49 #define CMD_SET_TRIGGER_MASK_0          0xc0
  50 #define CMD_SET_TRIGGER_MASK_1          0xc4
  51 #define CMD_SET_TRIGGER_MASK_2          0xc8
  52 #define CMD_SET_TRIGGER_MASK_3          0xcc
  53 #define CMD_SET_TRIGGER_VALUE_0         0xc1
  54 #define CMD_SET_TRIGGER_VALUE_1         0xc5
  55 #define CMD_SET_TRIGGER_VALUE_2         0xc9
  56 #define CMD_SET_TRIGGER_VALUE_3         0xcd
  57 #define CMD_SET_TRIGGER_CONFIG_0        0xc2
  58 #define CMD_SET_TRIGGER_CONFIG_1        0xc6
  59 #define CMD_SET_TRIGGER_CONFIG_2        0xca
  60 #define CMD_SET_TRIGGER_CONFIG_3        0xce
  61
  62 /* Bitmasks for CMD_FLAGS */
  63 #define FLAG_DEMUX                      0x01
  64 #define FLAG_FILTER                     0x02
  65 #define FLAG_CHANNELGROUP_1             0x04
  66 #define FLAG_CHANNELGROUP_2             0x08
  67 #define FLAG_CHANNELGROUP_3             0x10
  68 #define FLAG_CHANNELGROUP_4             0x20
  69 #define FLAG_CLOCK_EXTERNAL             0x40
  70 #define FLAG_CLOCK_INVERTED             0x80
  71 #define FLAG_RLE                        0x0100
  72
  73 static int capabilities[] = {
  74         HWCAP_LOGIC_ANALYZER,
  75         HWCAP_SAMPLERATE,
  76         HWCAP_CAPTURE_RATIO,
  77         HWCAP_LIMIT_SAMPLES,
  78         0,
  79 };
  80
  81 static struct samplerates samplerates = {
  82         10,
  83         MHZ(200),
  84         1,
  85         0,
  86 };
  87
  88 /* List of struct serial_device_instance */
  89 static GSList *device_instances = NULL;
  90
  91 /* Current state of the flag register */
  92 static uint32_t flag_reg = 0;
  93
  94 static uint64_t cur_samplerate = 0;
  95 static uint64_t limit_samples = 0;
  96 /*
  97  * Pre/post trigger capture ratio, in percentage.
  98  * 0 means no pre-trigger data.
  99  */
 100 static int capture_ratio = 0;
 101 static uint32_t probe_mask = 0xffffffff;
 102 static uint32_t trigger_mask[4] = { 0, 0, 0, 0 };
 103 static uint32_t trigger_value[4] = { 0, 0, 0, 0 };
 104
 105 static int send_shortcommand(int fd, uint8_t command)
 106 {
 107         char buf[1];
 108
 109         g_message("ols: sending cmd 0x%.2x", command);
 110         buf[0] = command;
 111         if (write(fd, buf, 1) != 1)
 112                 return SIGROK_ERR;
 113
 114         return SIGROK_OK;
 115 }
 116
 117 static int send_longcommand(int fd, uint8_t command, uint32_t data)
 118 {
 119         char buf[5];
 120
 121         g_message("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
 122         buf[0] = command;
 123         buf[1] = (data & 0xff000000) >> 24;
 124         buf[2] = (data & 0xff0000) >> 16;
 125         buf[3] = (data & 0xff00) >> 8;
 126         buf[4] = data & 0xff;
 127         if (write(fd, buf, 5) != 5)
 128                 return SIGROK_ERR;
 129
 130         return SIGROK_OK;
 131 }
 132
 133 static int configure_probes(GSList *probes)
 134 {
 135         struct probe *probe;
 136         GSList *l;
 137         int probe_bit, stage, i;
 138         char *tc;
 139
 140         probe_mask = 0;
 141         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 142                 trigger_mask[i] = 0;
 143                 trigger_value[i] = 0;
 144         }
 145
 146         for (l = probes; l; l = l->next) {
 147                 probe = (struct probe *)l->data;
 148                 if (!probe->enabled)
 149                         continue;
 150
 151                 /*
 152                  * Set up the probe mask for later configuration into the
 153                  * flag register.
 154                  */
 155                 probe_bit = 1 << (probe->index - 1);
 156                 probe_mask |= probe_bit;
 157
 158                 if (probe->trigger)
 159                         continue;
 160
 161                 /* Configure trigger mask and value. */
 162                 stage = 0;
 163                 for (tc = probe->trigger; tc && *tc; tc++) {
 164                         trigger_mask[stage] |= probe_bit;
 165                         if (*tc == '1')
 166                                 trigger_value[stage] |= probe_bit;
 167                         stage++;
 168                         if (stage > 3)
 169                                 /*
 170                                  * TODO: Only supporting parallel mode, with
 171                                  * up to 4 stages.
 172                                  */
 173                                 return SIGROK_ERR;
 174                 }
 175         }
 176
 177         return SIGROK_OK;
 178 }
 179
 180 static void byteswap(uint32_t * in)
 181 {
 182         uint32_t out;
 183
 184         out = (*in & 0xff) << 8;
 185         out |= (*in & 0xff00) >> 8;
 186         out |= (*in & 0xff0000) << 8;
 187         out |= (*in & 0xff000000) >> 8;
 188         *in = out;
 189 }
 190
 191 static int hw_init(char *deviceinfo)
 192 {
 193         struct sigrok_device_instance *sdi;
 194         GSList *ports, *l;
 195         GPollFD *fds;
 196         int devcnt, final_devcnt, num_ports, fd, ret, i;
 197         char buf[8], **device_names, **serial_params;
 198
 199         if (deviceinfo)
 200                 ports = g_slist_append(NULL, strdup(deviceinfo));
 201         else
 202                 /* No specific device given, so scan all serial ports. */
 203                 ports = list_serial_ports();
 204
 205         num_ports = g_slist_length(ports);
 206         fds = calloc(1, num_ports * sizeof(GPollFD));
 207         device_names = malloc(num_ports * sizeof(char *));
 208         serial_params = malloc(num_ports * sizeof(char *));
 209         devcnt = 0;
 210         for (l = ports; l; l = l->next) {
 211                 /* The discovery procedure is like this: first send the Reset
 212                  * command (0x00) 5 times, since the device could be anywhere
 213                  * in a 5-byte command. Then send the ID command (0x02).
 214                  * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 215                  * have a match.
 216                  *
 217                  * Since it may take the device a while to respond at 115Kb/s,
 218                  * we do all the sending first, then wait for all of them to
 219                  * respond with g_poll().
 220                  */
 221                 g_message("probing %s...", (char *)l->data);
 222                 fd = serial_open(l->data, O_RDWR | O_NONBLOCK);
 223                 if (fd != -1) {
 224                         serial_params[devcnt] = serial_backup_params(fd);
 225                         serial_set_params(fd, 115200, 8, 0, 1, 2);
 226                         ret = SIGROK_OK;
 227                         for (i = 0; i < 5; i++) {
 228                                 if ((ret = send_shortcommand(fd,
 229                                         CMD_RESET)) != SIGROK_OK) {
 230                                         /* Serial port is not writable. */
 231                                         break;
 232                                 }
 233                         }
 234                         if (ret != SIGROK_OK) {
 235                                 serial_restore_params(fd,
 236                                         serial_params[devcnt]);
 237                                 serial_close(fd);
 238                                 continue;
 239                         }
 240                         send_shortcommand(fd, CMD_ID);
 241                         fds[devcnt].fd = fd;
 242                         fds[devcnt].events = G_IO_IN;
 243                         device_names[devcnt] = strdup(l->data);
 244                         devcnt++;
 245                 }
 246                 free(l->data);
 247         }
 248
 249         /* 2ms should do (enough time for 28 bytes to go over the bus). */
 250         usleep(2000);
 251
 252         final_devcnt = 0;
 253         g_poll(fds, devcnt, 1);
 254         for (i = 0; i < devcnt; i++) {
 255                 if (fds[i].revents == G_IO_IN) {
 256                         if (read(fds[i].fd, buf, 4) == 4) {
 257                                 if (!strncmp(buf, "1SLO", 4)
 258                                     || !strncmp(buf, "1ALS", 4)) {
 259                                         if (!strncmp(buf, "1SLO", 4))
 260                                                 sdi = sigrok_device_instance_new
 261                                                     (final_devcnt, ST_INACTIVE,
 262                                                      "Openbench",
 263                                                      "Logic Sniffer", "v1.0");
 264                                         else
 265                                                 sdi = sigrok_device_instance_new
 266                                                     (final_devcnt, ST_INACTIVE,
 267                                                      "Sump", "Logic Analyzer",
 268                                                      "v1.0");
 269                                         sdi->serial = serial_device_instance_new
 270                                             (device_names[i], -1);
 271                                         device_instances =
 272                                             g_slist_append(device_instances, sdi);
 273                                         final_devcnt++;
 274                                         serial_close(fds[i].fd);
 275                                         fds[i].fd = 0;
 276                                 }
 277                         }
 278                         free(device_names[i]);
 279                 }
 280
 281                 if (fds[i].fd != 0) {
 282                         serial_restore_params(fds[i].fd, serial_params[i]);
 283                         serial_close(fds[i].fd);
 284                 }
 285                 free(serial_params[i]);
 286         }
 287
 288         free(fds);
 289         free(device_names);
 290         free(serial_params);
 291         g_slist_free(ports);
 292
 293         cur_samplerate = samplerates.low;
 294
 295         return final_devcnt;
 296 }
 297
 298 static int hw_opendev(int device_index)
 299 {
 300         struct sigrok_device_instance *sdi;
 301
 302         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 303                 return SIGROK_ERR;
 304
 305         sdi->serial->fd = serial_open(sdi->serial->port, O_RDWR);
 306         if (sdi->serial->fd == -1)
 307                 return SIGROK_ERR;
 308
 309         sdi->status = ST_ACTIVE;
 310
 311         return SIGROK_OK;
 312 }
 313
 314 static void hw_closedev(int device_index)
 315 {
 316         struct sigrok_device_instance *sdi;
 317
 318         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 319                 return;
 320
 321         if (sdi->serial->fd != -1) {
 322                 serial_close(sdi->serial->fd);
 323                 sdi->serial->fd = -1;
 324                 sdi->status = ST_INACTIVE;
 325         }
 326 }
 327
 328 static void hw_cleanup(void)
 329 {
 330         GSList *l;
 331         struct sigrok_device_instance *sdi;
 332
 333         /* Properly close all devices. */
 334         for (l = device_instances; l; l = l->next) {
 335                 sdi = l->data;
 336                 if (sdi->serial->fd != -1)
 337                         serial_close(sdi->serial->fd);
 338                 sigrok_device_instance_free(sdi);
 339         }
 340         g_slist_free(device_instances);
 341         device_instances = NULL;
 342 }
 343
 344 static void *hw_get_device_info(int device_index, int device_info_id)
 345 {
 346         struct sigrok_device_instance *sdi;
 347         void *info;
 348
 349         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 350                 return NULL;
 351
 352         info = NULL;
 353         switch (device_info_id) {
 354         case DI_INSTANCE:
 355                 info = sdi;
 356                 break;
 357         case DI_NUM_PROBES:
 358                 info = GINT_TO_POINTER(NUM_PROBES);
 359                 break;
 360         case DI_SAMPLERATES:
 361                 info = &samplerates;
 362                 break;
 363         case DI_TRIGGER_TYPES:
 364                 info = (char *)TRIGGER_TYPES;
 365                 break;
 366         case DI_CUR_SAMPLERATE:
 367                 info = &cur_samplerate;
 368                 break;
 369         }
 370
 371         return info;
 372 }
 373
 374 static int hw_get_status(int device_index)
 375 {
 376         struct sigrok_device_instance *sdi;
 377
 378         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 379                 return ST_NOT_FOUND;
 380
 381         return sdi->status;
 382 }
 383
 384 static int *hw_get_capabilities(void)
 385 {
 386         return capabilities;
 387 }
 388
 389 static int set_configuration_samplerate(struct sigrok_device_instance *sdi,
 390                                         uint64_t samplerate)
 391 {
 392         uint32_t divider;
 393
 394         if (samplerate < samplerates.low || samplerate > samplerates.high)
 395                 return SIGROK_ERR_SAMPLERATE;
 396
 397         if (samplerate > CLOCK_RATE) {
 398                 flag_reg |= FLAG_DEMUX;
 399                 divider = (CLOCK_RATE * 2 / samplerate) - 1;
 400         } else {
 401                 flag_reg &= ~FLAG_DEMUX;
 402                 divider = (CLOCK_RATE / samplerate) - 1;
 403         }
 404         divider = htonl(divider);
 405
 406         g_message("setting samplerate to %" PRIu64 " Hz (divider %u, demux %s)",
 407                   samplerate, divider, flag_reg & FLAG_DEMUX ? "on" : "off");
 408
 409         if (send_longcommand(sdi->serial->fd, CMD_SET_DIVIDER,
 410             divider) != SIGROK_OK)
 411                 return SIGROK_ERR;
 412         cur_samplerate = samplerate;
 413
 414         return SIGROK_OK;
 415 }
 416
 417 static int hw_set_configuration(int device_index, int capability, void *value)
 418 {
 419         struct sigrok_device_instance *sdi;
 420         int ret;
 421         uint64_t *tmp_u64;
 422
 423         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 424                 return SIGROK_ERR;
 425
 426         if (sdi->status != ST_ACTIVE)
 427                 return SIGROK_ERR;
 428
 429         if (capability == HWCAP_SAMPLERATE) {
 430                 tmp_u64 = value;
 431                 ret = set_configuration_samplerate(sdi, *tmp_u64);
 432         } else if (capability == HWCAP_PROBECONFIG) {
 433                 ret = configure_probes((GSList *) value);
 434         } else if (capability == HWCAP_LIMIT_SAMPLES) {
 435                 limit_samples = strtoull(value, NULL, 10);
 436                 ret = SIGROK_OK;
 437         } else if (capability == HWCAP_CAPTURE_RATIO) {
 438                 capture_ratio = strtol(value, NULL, 10);
 439                 if (capture_ratio < 0 || capture_ratio > 100) {
 440                         capture_ratio = 0;
 441                         ret = SIGROK_ERR;
 442                 } else
 443                         ret = SIGROK_OK;
 444         } else {
 445                 ret = SIGROK_ERR;
 446         }
 447
 448         return ret;
 449 }
 450
 451 static int receive_data(int fd, int revents, void *user_data)
 452 {
 453         static unsigned int num_transfers = 0;
 454         static int num_bytes = 0;
 455         static char last_sample[4] = { 0xff, 0xff, 0xff, 0xff };
 456         static unsigned char sample[4] = { 0, 0, 0, 0 };
 457         static unsigned char tmp_sample[4];
 458         int count, buflen, num_channels, i, j;
 459         struct datafeed_packet packet;
 460         unsigned char byte, *buffer;
 461
 462         if (num_transfers++ == 0) {
 463                 /*
 464                  * First time round, means the device started sending data,
 465                  * and will not stop until done. If it stops sending for
 466                  * longer than it takes to send a byte, that means it's
 467                  * finished. We'll double that to 30ms to be sure...
 468                  */
 469                 source_remove(fd);
 470                 source_add(fd, G_IO_IN, 100, receive_data, user_data);
 471         }
 472
 473         num_channels = 0;
 474         for (i = 0x20; i > 0x02; i /= 2) {
 475                 if ((flag_reg & i) == 0)
 476                         num_channels++;
 477         }
 478
 479         if (revents == G_IO_IN
 480             && num_transfers / num_channels <= limit_samples) {
 481                 if (read(fd, &byte, 1) != 1)
 482                         return FALSE;
 483
 484                 sample[num_bytes++] = byte;
 485                 if (num_bytes == num_channels) {
 486                         /* Got a full sample. */
 487                         if (flag_reg & FLAG_RLE) {
 488                                 /*
 489                                  * In RLE mode -1 should never come in as a
 490                                  * sample, because bit 31 is the "count" flag.
 491                                  * TODO: Endianness may be wrong here, could be
 492                                  * sample[3].
 493                                  */
 494                                 if (sample[0] & 0x80
 495                                     && !(last_sample[0] & 0x80)) {
 496                                         count = (int)(*sample) & 0x7fffffff;
 497                                         buffer = g_malloc(count);
 498                                         buflen = 0;
 499                                         for (i = 0; i < count; i++) {
 500                                                 memcpy(buffer + buflen,
 501                                                        last_sample, 4);
 502                                                 buflen += 4;
 503                                         }
 504                                 } else {
 505                                         /*
 506                                          * Just a single sample, next sample
 507                                          * will probably be a count referring
 508                                          * to this -- but this one is still a
 509                                          * part of the stream.
 510                                          */
 511                                         buffer = sample;
 512                                         buflen = 4;
 513                                 }
 514                         } else {
 515                                 /* No compression. */
 516                                 buffer = sample;
 517                                 buflen = 4;
 518                         }
 519
 520                         if (num_channels < 4) {
 521                                 /*
 522                                  * Some channel groups may have been turned
 523                                  * off, to speed up transfer between the
 524                                  * hardware and the PC. Expand that here before
 525                                  * submitting it over the session bus --
 526                                  * whatever is listening on the bus will be
 527                                  * expecting a full 32-bit sample, based on
 528                                  * the number of probes.
 529                                  */
 530                                 j = 0;
 531                                 memset(tmp_sample, 0, 4);
 532                                 for (i = 0; i < 4; i++) {
 533                                         if ((flag_reg & (8 >> i)) == 0) {
 534                                                 /*
 535                                                  * This channel group was
 536                                                  * enabled, copy from received
 537                                                  * sample.
 538                                                  */
 539                                                 tmp_sample[i] = sample[j++];
 540                                         }
 541                                 }
 542                                 memcpy(sample, tmp_sample, 4);
 543                         }
 544
 545                         /* Send it all to the session bus. */
 546                         packet.type = DF_LOGIC32;
 547                         packet.length = buflen;
 548                         packet.payload = buffer;
 549                         session_bus(user_data, &packet);
 550                         if (buffer == sample)
 551                                 memcpy(last_sample, buffer, num_channels);
 552                         else
 553                                 g_free(buffer);
 554
 555                         memset(sample, 0, 4);
 556                         num_bytes = 0;
 557                 }
 558         } else {
 559                 /*
 560                  * This is the main loop telling us a timeout was reached, or
 561                  * we've acquired all the samples we asked for -- we're done.
 562                  */
 563                 tcflush(fd, TCIOFLUSH);
 564                 serial_close(fd);
 565                 packet.type = DF_END;
 566                 packet.length = 0;
 567                 session_bus(user_data, &packet);
 568         }
 569
 570         return TRUE;
 571 }
 572
 573 static int hw_start_acquisition(int device_index, gpointer session_device_id)
 574 {
 575         int i;
 576         struct datafeed_packet *packet;
 577         struct datafeed_header *header;
 578         struct sigrok_device_instance *sdi;
 579         uint32_t data;
 580         uint16_t readcount, delaycount;
 581         uint8_t changrp_mask;
 582
 583         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 584                 return SIGROK_ERR;
 585
 586         if (sdi->status != ST_ACTIVE)
 587                 return SIGROK_ERR;
 588
 589         if (trigger_mask[0]) {
 590                 /* Trigger masks */
 591                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 592                      trigger_mask[0]) != SIGROK_OK)
 593                         return SIGROK_ERR;
 594                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_1,
 595                      trigger_mask[1]) != SIGROK_OK)
 596                         return SIGROK_ERR;
 597                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_2,
 598                      trigger_mask[2]) != SIGROK_OK)
 599                         return SIGROK_ERR;
 600                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_3,
 601                      trigger_mask[3]) != SIGROK_OK)
 602                         return SIGROK_ERR;
 603
 604                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 605                      trigger_value[0]) != SIGROK_OK)
 606                         return SIGROK_ERR;
 607                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_1,
 608                      trigger_value[1]) != SIGROK_OK)
 609                         return SIGROK_ERR;
 610                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_2,
 611                      trigger_value[2]) != SIGROK_OK)
 612                         return SIGROK_ERR;
 613                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_3,
 614                      trigger_value[3]) != SIGROK_OK)
 615                         return SIGROK_ERR;
 616
 617                 /* Trigger configuration */
 618                 /*
 619                  * TODO: The start flag should only be on the last used
 620                  * stage I think...
 621                  */
 622                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 623                      0x00000008) != SIGROK_OK)
 624                         return SIGROK_ERR;
 625                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_1,
 626                      0x00000000) != SIGROK_OK)
 627                         return SIGROK_ERR;
 628                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_2,
 629                      0x00000000) != SIGROK_OK)
 630                         return SIGROK_ERR;
 631                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_3,
 632                      0x00000000) != SIGROK_OK)
 633                         return SIGROK_ERR;
 634                 delaycount = limit_samples / 4 * (capture_ratio / 100);
 635         } else {
 636                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 637                      trigger_mask[0]) != SIGROK_OK)
 638                         return SIGROK_ERR;
 639                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 640                      trigger_value[0]) != SIGROK_OK)
 641                         return SIGROK_ERR;
 642                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 643                      0x00000008) != SIGROK_OK)
 644                         return SIGROK_ERR;
 645                 delaycount = limit_samples / 4;
 646         }
 647
 648         set_configuration_samplerate(sdi, cur_samplerate);
 649
 650         /* Send sample limit and pre/post-trigger capture ratio. */
 651         readcount = limit_samples / 4;
 652         if (flag_reg & FLAG_DEMUX) {
 653                 data = (delaycount - 8) & 0xfff8 << 13;
 654                 data |= (readcount - 4) & 0xffff;
 655         } else {
 656                 flag_reg |= FLAG_FILTER;
 657                 data = (readcount - 1) << 16;
 658                 data |= (delaycount - 1);
 659         }
 660         /* TODO: htonl()? */
 661         byteswap(&data);
 662         if (send_longcommand(sdi->serial->fd, CMD_CAPTURE_SIZE,
 663             data) != SIGROK_OK)
 664                 return SIGROK_ERR;
 665
 666         /*
 667          * Enable/disable channel groups in the flag register according to the
 668          * probe mask. The register stores them backwards, hence shift right
 669          * from 1000.
 670          */
 671         changrp_mask = 0;
 672         for (i = 0; i < 4; i++) {
 673                 if (probe_mask & (0xff << (i * 8)))
 674                         changrp_mask |= (8 >> i);
 675         }
 676
 677         /* The flag register wants them here, and 1 means "disable channel". */
 678         flag_reg |= ~(changrp_mask << 2) & 0x3c;
 679
 680         data = flag_reg << 24;
 681         if (send_longcommand(sdi->serial->fd, CMD_SET_FLAGS, data) != SIGROK_OK)
 682                 return SIGROK_ERR;
 683
 684         /* Start acquisition on the device. */
 685         if (send_shortcommand(sdi->serial->fd, CMD_RUN) != SIGROK_OK)
 686                 return SIGROK_ERR;
 687
 688         source_add(sdi->serial->fd, G_IO_IN, -1, receive_data,
 689                    session_device_id);
 690
 691         /* Send header packet to the session bus. */
 692         packet = g_malloc(sizeof(struct datafeed_packet));
 693         header = g_malloc(sizeof(struct datafeed_header));
 694         if (!packet || !header)
 695                 return SIGROK_ERR;
 696         packet->type = DF_HEADER;
 697         packet->length = sizeof(struct datafeed_header);
 698         packet->payload = (unsigned char *)header;
 699         header->feed_version = 1;
 700         gettimeofday(&header->starttime, NULL);
 701         header->samplerate = cur_samplerate;
 702         header->protocol_id = PROTO_RAW;
 703         header->num_probes = NUM_PROBES;
 704         session_bus(session_device_id, packet);
 705         g_free(header);
 706         g_free(packet);
 707
 708         return SIGROK_OK;
 709 }
 710
 711 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 712 {
 713         struct datafeed_packet packet;
 714
 715         /* QUICK HACK */
 716         device_index = device_index;
 717
 718         packet.type = DF_END;
 719         packet.length = 0;
 720         session_bus(session_device_id, &packet);
 721 }
 722
 723 struct device_plugin ols_plugin_info = {
 724         "sump",
 725         1,
 726         hw_init,
 727         hw_cleanup,
 728         hw_opendev,
 729         hw_closedev,
 730         hw_get_device_info,
 731         hw_get_status,
 732         hw_get_capabilities,
 733         hw_set_configuration,
 734         hw_start_acquisition,
 735         hw_stop_acquisition,
 736 };