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 /* TODO: SERIAL_ bits, parity, stop bit */
  46 #define CLOCK_RATE                      100000000
  47
  48 /* Command opcodes */
  49 #define CMD_RESET                       0x00
  50 #define CMD_ID                          0x02
  51 #define CMD_SET_FLAGS                   0x82
  52 #define CMD_SET_DIVIDER                 0x80
  53 #define CMD_RUN                         0x01
  54 #define CMD_CAPTURE_SIZE                0x81
  55 #define CMD_SET_TRIGGER_MASK_0          0xc0
  56 #define CMD_SET_TRIGGER_MASK_1          0xc4
  57 #define CMD_SET_TRIGGER_MASK_2          0xc8
  58 #define CMD_SET_TRIGGER_MASK_3          0xcc
  59 #define CMD_SET_TRIGGER_VALUE_0         0xc1
  60 #define CMD_SET_TRIGGER_VALUE_1         0xc5
  61 #define CMD_SET_TRIGGER_VALUE_2         0xc9
  62 #define CMD_SET_TRIGGER_VALUE_3         0xcd
  63 #define CMD_SET_TRIGGER_CONFIG_0        0xc2
  64 #define CMD_SET_TRIGGER_CONFIG_1        0xc6
  65 #define CMD_SET_TRIGGER_CONFIG_2        0xca
  66 #define CMD_SET_TRIGGER_CONFIG_3        0xce
  67
  68 /* Bitmasks for CMD_FLAGS */
  69 #define FLAG_DEMUX                      0x01
  70 #define FLAG_FILTER                     0x02
  71 #define FLAG_CHANNELGROUP_1             0x04
  72 #define FLAG_CHANNELGROUP_2             0x08
  73 #define FLAG_CHANNELGROUP_3             0x10
  74 #define FLAG_CHANNELGROUP_4             0x20
  75 #define FLAG_CLOCK_EXTERNAL             0x40
  76 #define FLAG_CLOCK_INVERTED             0x80
  77 #define FLAG_RLE                        0x0100
  78
  79 static int capabilities[] = {
  80         HWCAP_LOGIC_ANALYZER,
  81         HWCAP_SAMPLERATE,
  82         HWCAP_CAPTURE_RATIO,
  83         HWCAP_LIMIT_SAMPLES,
  84         0,
  85 };
  86
  87 static struct samplerates samplerates = {
  88         10,
  89         MHZ(200),
  90         1,
  91         0,
  92 };
  93
  94 /* List of struct serial_device_instance */
  95 static GSList *device_instances = NULL;
  96
  97 /* Current state of the flag register */
  98 static uint32_t flag_reg = 0;
  99
 100 static uint64_t cur_samplerate = 0;
 101 static uint64_t limit_samples = 0;
 102 /*
 103  * Pre/post trigger capture ratio, in percentage.
 104  * 0 means no pre-trigger data.
 105  */
 106 static int capture_ratio = 0;
 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
 111 static int send_shortcommand(int fd, uint8_t command)
 112 {
 113         char buf[1];
 114
 115         g_message("ols: sending cmd 0x%.2x", command);
 116         buf[0] = command;
 117         if (write(fd, buf, 1) != 1)
 118                 return SIGROK_ERR;
 119
 120         return SIGROK_OK;
 121 }
 122
 123 static int send_longcommand(int fd, uint8_t command, uint32_t data)
 124 {
 125         char buf[5];
 126
 127         g_message("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
 128         buf[0] = command;
 129         buf[1] = (data & 0xff000000) >> 24;
 130         buf[2] = (data & 0xff0000) >> 16;
 131         buf[3] = (data & 0xff00) >> 8;
 132         buf[4] = data & 0xff;
 133         if (write(fd, buf, 5) != 5)
 134                 return SIGROK_ERR;
 135
 136         return SIGROK_OK;
 137 }
 138
 139 static int configure_probes(GSList *probes)
 140 {
 141         struct probe *probe;
 142         GSList *l;
 143         int probe_bit, stage, i;
 144         char *tc;
 145
 146         probe_mask = 0;
 147         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 148                 trigger_mask[i] = 0;
 149                 trigger_value[i] = 0;
 150         }
 151
 152         for (l = probes; l; l = l->next) {
 153                 probe = (struct probe *)l->data;
 154                 if (!probe->enabled)
 155                         continue;
 156
 157                 /*
 158                  * Set up the probe mask for later configuration into the
 159                  * flag register.
 160                  */
 161                 probe_bit = 1 << (probe->index - 1);
 162                 probe_mask |= probe_bit;
 163
 164                 if (probe->trigger)
 165                         continue;
 166
 167                 /* Configure trigger mask and value. */
 168                 stage = 0;
 169                 for (tc = probe->trigger; tc && *tc; tc++) {
 170                         trigger_mask[stage] |= probe_bit;
 171                         if (*tc == '1')
 172                                 trigger_value[stage] |= probe_bit;
 173                         stage++;
 174                         if (stage > 3)
 175                                 /*
 176                                  * TODO: Only supporting parallel mode, with
 177                                  * up to 4 stages.
 178                                  */
 179                                 return SIGROK_ERR;
 180                 }
 181         }
 182
 183         return SIGROK_OK;
 184 }
 185
 186 static void byteswap(uint32_t * in)
 187 {
 188         uint32_t out;
 189
 190         out = (*in & 0xff) << 8;
 191         out |= (*in & 0xff00) >> 8;
 192         out |= (*in & 0xff0000) << 8;
 193         out |= (*in & 0xff000000) >> 8;
 194         *in = out;
 195 }
 196
 197 static int hw_init(char *deviceinfo)
 198 {
 199         struct sigrok_device_instance *sdi;
 200         GSList *ports, *l;
 201         GPollFD *fds;
 202         int devcnt, final_devcnt, num_ports, fd, ret, i;
 203         char buf[8], **device_names, **serial_params;
 204
 205         if (deviceinfo)
 206                 ports = g_slist_append(NULL, strdup(deviceinfo));
 207         else
 208                 /* No specific device given, so scan all serial ports. */
 209                 ports = list_serial_ports();
 210
 211         num_ports = g_slist_length(ports);
 212         fds = calloc(1, num_ports * sizeof(GPollFD));
 213         device_names = malloc(num_ports * sizeof(char *));
 214         serial_params = malloc(num_ports * sizeof(char *));
 215         devcnt = 0;
 216         for (l = ports; l; l = l->next) {
 217                 /* The discovery procedure is like this: first send the Reset
 218                  * command (0x00) 5 times, since the device could be anywhere
 219                  * in a 5-byte command. Then send the ID command (0x02).
 220                  * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 221                  * have a match.
 222                  *
 223                  * Since it may take the device a while to respond at 115Kb/s,
 224                  * we do all the sending first, then wait for all of them to
 225                  * respond with g_poll().
 226                  */
 227                 g_message("probing %s...", (char *)l->data);
 228 #ifdef _WIN32
 229                 // FIXME
 230                 // hdl = serial_open(l->data, 0);
 231 #else
 232                 fd = serial_open(l->data, O_RDWR | O_NONBLOCK);
 233 #endif
 234                 if (fd != -1) {
 235                         serial_params[devcnt] = serial_backup_params(fd);
 236                         serial_set_params(fd, 115200, 8, 0, 1, 2);
 237                         ret = SIGROK_OK;
 238                         for (i = 0; i < 5; i++) {
 239                                 if ((ret = send_shortcommand(fd,
 240                                         CMD_RESET)) != SIGROK_OK) {
 241                                         /* Serial port is not writable. */
 242                                         break;
 243                                 }
 244                         }
 245                         if (ret != SIGROK_OK) {
 246                                 serial_restore_params(fd,
 247                                         serial_params[devcnt]);
 248                                 serial_close(fd);
 249                                 continue;
 250                         }
 251                         send_shortcommand(fd, CMD_ID);
 252                         fds[devcnt].fd = fd;
 253                         fds[devcnt].events = G_IO_IN;
 254                         device_names[devcnt] = strdup(l->data);
 255                         devcnt++;
 256                 }
 257                 free(l->data);
 258         }
 259
 260         /* 2ms isn't enough for reliable transfer with pl2303, let's try 10 */
 261         usleep(10000);
 262
 263         final_devcnt = 0;
 264         g_poll(fds, devcnt, 1);
 265         for (i = 0; i < devcnt; i++) {
 266                 if (fds[i].revents == G_IO_IN) {
 267                         if (read(fds[i].fd, buf, 4) == 4) {
 268                                 if (!strncmp(buf, "1SLO", 4)
 269                                     || !strncmp(buf, "1ALS", 4)) {
 270                                         if (!strncmp(buf, "1SLO", 4))
 271                                                 sdi = sigrok_device_instance_new
 272                                                     (final_devcnt, ST_INACTIVE,
 273                                                      "Openbench",
 274                                                      "Logic Sniffer", "v1.0");
 275                                         else
 276                                                 sdi = sigrok_device_instance_new
 277                                                     (final_devcnt, ST_INACTIVE,
 278                                                      "Sump", "Logic Analyzer",
 279                                                      "v1.0");
 280                                         sdi->serial = serial_device_instance_new
 281                                             (device_names[i], -1);
 282                                         device_instances =
 283                                             g_slist_append(device_instances, sdi);
 284                                         final_devcnt++;
 285                                         serial_close(fds[i].fd);
 286                                         fds[i].fd = 0;
 287                                 }
 288                         }
 289                         free(device_names[i]);
 290                 }
 291
 292                 if (fds[i].fd != 0) {
 293                         serial_restore_params(fds[i].fd, serial_params[i]);
 294                         serial_close(fds[i].fd);
 295                 }
 296                 free(serial_params[i]);
 297         }
 298
 299         free(fds);
 300         free(device_names);
 301         free(serial_params);
 302         g_slist_free(ports);
 303
 304         cur_samplerate = samplerates.low;
 305
 306         return final_devcnt;
 307 }
 308
 309 static int hw_opendev(int device_index)
 310 {
 311         struct sigrok_device_instance *sdi;
 312
 313         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 314                 return SIGROK_ERR;
 315
 316         sdi->serial->fd = serial_open(sdi->serial->port, O_RDWR);
 317         if (sdi->serial->fd == -1)
 318                 return SIGROK_ERR;
 319
 320         sdi->status = ST_ACTIVE;
 321
 322         return SIGROK_OK;
 323 }
 324
 325 static void hw_closedev(int device_index)
 326 {
 327         struct sigrok_device_instance *sdi;
 328
 329         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 330                 return;
 331
 332         if (sdi->serial->fd != -1) {
 333                 serial_close(sdi->serial->fd);
 334                 sdi->serial->fd = -1;
 335                 sdi->status = ST_INACTIVE;
 336         }
 337 }
 338
 339 static void hw_cleanup(void)
 340 {
 341         GSList *l;
 342         struct sigrok_device_instance *sdi;
 343
 344         /* Properly close all devices. */
 345         for (l = device_instances; l; l = l->next) {
 346                 sdi = l->data;
 347                 if (sdi->serial->fd != -1)
 348                         serial_close(sdi->serial->fd);
 349                 sigrok_device_instance_free(sdi);
 350         }
 351         g_slist_free(device_instances);
 352         device_instances = NULL;
 353 }
 354
 355 static void *hw_get_device_info(int device_index, int device_info_id)
 356 {
 357         struct sigrok_device_instance *sdi;
 358         void *info;
 359
 360         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 361                 return NULL;
 362
 363         info = NULL;
 364         switch (device_info_id) {
 365         case DI_INSTANCE:
 366                 info = sdi;
 367                 break;
 368         case DI_NUM_PROBES:
 369                 info = GINT_TO_POINTER(NUM_PROBES);
 370                 break;
 371         case DI_SAMPLERATES:
 372                 info = &samplerates;
 373                 break;
 374         case DI_TRIGGER_TYPES:
 375                 info = (char *)TRIGGER_TYPES;
 376                 break;
 377         case DI_CUR_SAMPLERATE:
 378                 info = &cur_samplerate;
 379                 break;
 380         }
 381
 382         return info;
 383 }
 384
 385 static int hw_get_status(int device_index)
 386 {
 387         struct sigrok_device_instance *sdi;
 388
 389         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 390                 return ST_NOT_FOUND;
 391
 392         return sdi->status;
 393 }
 394
 395 static int *hw_get_capabilities(void)
 396 {
 397         return capabilities;
 398 }
 399
 400 static int set_configuration_samplerate(struct sigrok_device_instance *sdi,
 401                                         uint64_t samplerate)
 402 {
 403         uint32_t divider;
 404
 405         if (samplerate < samplerates.low || samplerate > samplerates.high)
 406                 return SIGROK_ERR_SAMPLERATE;
 407
 408         if (samplerate > CLOCK_RATE) {
 409                 flag_reg |= FLAG_DEMUX;
 410                 divider = (CLOCK_RATE * 2 / samplerate) - 1;
 411         } else {
 412                 flag_reg &= ~FLAG_DEMUX;
 413                 divider = (CLOCK_RATE / samplerate) - 1;
 414         }
 415 #ifdef _WIN32
 416         // FIXME
 417         // divider = htonl(divider);
 418 #else
 419         divider = htonl(divider);
 420 #endif
 421
 422         g_message("setting samplerate to %" PRIu64 " Hz (divider %u, demux %s)",
 423                   samplerate, divider, flag_reg & FLAG_DEMUX ? "on" : "off");
 424
 425         if (send_longcommand(sdi->serial->fd, CMD_SET_DIVIDER,
 426             divider) != SIGROK_OK)
 427                 return SIGROK_ERR;
 428         cur_samplerate = samplerate;
 429
 430         return SIGROK_OK;
 431 }
 432
 433 static int hw_set_configuration(int device_index, int capability, void *value)
 434 {
 435         struct sigrok_device_instance *sdi;
 436         int ret;
 437         uint64_t *tmp_u64;
 438
 439         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 440                 return SIGROK_ERR;
 441
 442         if (sdi->status != ST_ACTIVE)
 443                 return SIGROK_ERR;
 444
 445         if (capability == HWCAP_SAMPLERATE) {
 446                 tmp_u64 = value;
 447                 ret = set_configuration_samplerate(sdi, *tmp_u64);
 448         } else if (capability == HWCAP_PROBECONFIG) {
 449                 ret = configure_probes((GSList *) value);
 450         } else if (capability == HWCAP_LIMIT_SAMPLES) {
 451                 tmp_u64 = value;
 452                 limit_samples = *tmp_u64;
 453                 ret = SIGROK_OK;
 454         } else if (capability == HWCAP_CAPTURE_RATIO) {
 455                 capture_ratio = strtol(value, NULL, 10);
 456                 if (capture_ratio < 0 || capture_ratio > 100) {
 457                         capture_ratio = 0;
 458                         ret = SIGROK_ERR;
 459                 } else
 460                         ret = SIGROK_OK;
 461         } else {
 462                 ret = SIGROK_ERR;
 463         }
 464
 465         return ret;
 466 }
 467
 468 static int receive_data(int fd, int revents, void *user_data)
 469 {
 470         static unsigned int num_transfers = 0;
 471         static int num_bytes = 0;
 472         static char last_sample[4] = { 0xff, 0xff, 0xff, 0xff };
 473         static unsigned char sample[4] = { 0, 0, 0, 0 };
 474         static unsigned char tmp_sample[4];
 475         int count, buflen, num_channels, i, j;
 476         struct datafeed_packet packet;
 477         unsigned char byte, *buffer;
 478
 479         if (num_transfers++ == 0) {
 480                 /*
 481                  * First time round, means the device started sending data,
 482                  * and will not stop until done. If it stops sending for
 483                  * longer than it takes to send a byte, that means it's
 484                  * finished. We'll double that to 30ms to be sure...
 485                  */
 486                 source_remove(fd);
 487                 source_add(fd, G_IO_IN, 100, receive_data, user_data);
 488         }
 489
 490         num_channels = 0;
 491         for (i = 0x20; i > 0x02; i /= 2) {
 492                 if ((flag_reg & i) == 0)
 493                         num_channels++;
 494         }
 495
 496         if (revents == G_IO_IN
 497             && num_transfers / num_channels <= limit_samples) {
 498                 if (read(fd, &byte, 1) != 1)
 499                         return FALSE;
 500
 501                 sample[num_bytes++] = byte;
 502                 if (num_bytes == num_channels) {
 503                         /* Got a full sample. */
 504                         if (flag_reg & FLAG_RLE) {
 505                                 /*
 506                                  * In RLE mode -1 should never come in as a
 507                                  * sample, because bit 31 is the "count" flag.
 508                                  * TODO: Endianness may be wrong here, could be
 509                                  * sample[3].
 510                                  */
 511                                 if (sample[0] & 0x80
 512                                     && !(last_sample[0] & 0x80)) {
 513                                         count = (int)(*sample) & 0x7fffffff;
 514                                         buffer = g_malloc(count);
 515                                         buflen = 0;
 516                                         for (i = 0; i < count; i++) {
 517                                                 memcpy(buffer + buflen,
 518                                                        last_sample, 4);
 519                                                 buflen += 4;
 520                                         }
 521                                 } else {
 522                                         /*
 523                                          * Just a single sample, next sample
 524                                          * will probably be a count referring
 525                                          * to this -- but this one is still a
 526                                          * part of the stream.
 527                                          */
 528                                         buffer = sample;
 529                                         buflen = 4;
 530                                 }
 531                         } else {
 532                                 /* No compression. */
 533                                 buffer = sample;
 534                                 buflen = 4;
 535                         }
 536
 537                         if (num_channels < 4) {
 538                                 /*
 539                                  * Some channel groups may have been turned
 540                                  * off, to speed up transfer between the
 541                                  * hardware and the PC. Expand that here before
 542                                  * submitting it over the session bus --
 543                                  * whatever is listening on the bus will be
 544                                  * expecting a full 32-bit sample, based on
 545                                  * the number of probes.
 546                                  */
 547                                 j = 0;
 548                                 memset(tmp_sample, 0, 4);
 549                                 for (i = 0; i < 4; i++) {
 550                                         if ((flag_reg & (8 >> i)) == 0) {
 551                                                 /*
 552                                                  * This channel group was
 553                                                  * enabled, copy from received
 554                                                  * sample.
 555                                                  */
 556                                                 tmp_sample[i] = sample[j++];
 557                                         }
 558                                 }
 559                                 memcpy(sample, tmp_sample, 4);
 560                         }
 561
 562                         /* Send it all to the session bus. */
 563                         packet.type = DF_LOGIC32;
 564                         packet.length = buflen;
 565                         packet.payload = buffer;
 566                         session_bus(user_data, &packet);
 567                         if (buffer == sample)
 568                                 memcpy(last_sample, buffer, num_channels);
 569                         else
 570                                 g_free(buffer);
 571
 572                         memset(sample, 0, 4);
 573                         num_bytes = 0;
 574                 }
 575         } else {
 576                 /*
 577                  * This is the main loop telling us a timeout was reached, or
 578                  * we've acquired all the samples we asked for -- we're done.
 579                  */
 580 #ifndef _WIN32
 581                 /* TODO: Move to serial.c? */
 582                 tcflush(fd, TCIOFLUSH);
 583 #endif
 584                 serial_close(fd);
 585                 packet.type = DF_END;
 586                 packet.length = 0;
 587                 session_bus(user_data, &packet);
 588         }
 589
 590         return TRUE;
 591 }
 592
 593 static int hw_start_acquisition(int device_index, gpointer session_device_id)
 594 {
 595         int i;
 596         struct datafeed_packet *packet;
 597         struct datafeed_header *header;
 598         struct sigrok_device_instance *sdi;
 599         uint32_t data;
 600         uint16_t readcount, delaycount;
 601         uint8_t changrp_mask;
 602
 603         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 604                 return SIGROK_ERR;
 605
 606         if (sdi->status != ST_ACTIVE)
 607                 return SIGROK_ERR;
 608
 609         if (trigger_mask[0]) {
 610                 /* Trigger masks */
 611                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 612                      trigger_mask[0]) != SIGROK_OK)
 613                         return SIGROK_ERR;
 614                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_1,
 615                      trigger_mask[1]) != SIGROK_OK)
 616                         return SIGROK_ERR;
 617                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_2,
 618                      trigger_mask[2]) != SIGROK_OK)
 619                         return SIGROK_ERR;
 620                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_3,
 621                      trigger_mask[3]) != SIGROK_OK)
 622                         return SIGROK_ERR;
 623
 624                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 625                      trigger_value[0]) != SIGROK_OK)
 626                         return SIGROK_ERR;
 627                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_1,
 628                      trigger_value[1]) != SIGROK_OK)
 629                         return SIGROK_ERR;
 630                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_2,
 631                      trigger_value[2]) != SIGROK_OK)
 632                         return SIGROK_ERR;
 633                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_3,
 634                      trigger_value[3]) != SIGROK_OK)
 635                         return SIGROK_ERR;
 636
 637                 /* Trigger configuration */
 638                 /*
 639                  * TODO: The start flag should only be on the last used
 640                  * stage I think...
 641                  */
 642                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 643                      0x00000008) != SIGROK_OK)
 644                         return SIGROK_ERR;
 645                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_1,
 646                      0x00000000) != SIGROK_OK)
 647                         return SIGROK_ERR;
 648                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_2,
 649                      0x00000000) != SIGROK_OK)
 650                         return SIGROK_ERR;
 651                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_3,
 652                      0x00000000) != SIGROK_OK)
 653                         return SIGROK_ERR;
 654                 delaycount = limit_samples / 4 * (capture_ratio / 100);
 655         } else {
 656                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 657                      trigger_mask[0]) != SIGROK_OK)
 658                         return SIGROK_ERR;
 659                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 660                      trigger_value[0]) != SIGROK_OK)
 661                         return SIGROK_ERR;
 662                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 663                      0x00000008) != SIGROK_OK)
 664                         return SIGROK_ERR;
 665                 delaycount = limit_samples / 4;
 666         }
 667
 668         set_configuration_samplerate(sdi, cur_samplerate);
 669
 670         /* Send sample limit and pre/post-trigger capture ratio. */
 671         readcount = limit_samples / 4;
 672         if (flag_reg & FLAG_DEMUX) {
 673                 data = (delaycount - 8) & 0xfff8 << 13;
 674                 data |= (readcount - 4) & 0xffff;
 675         } else {
 676                 flag_reg |= FLAG_FILTER;
 677                 data = (readcount - 1) << 16;
 678                 data |= (delaycount - 1);
 679         }
 680         /* TODO: htonl()? */
 681         byteswap(&data);
 682         if (send_longcommand(sdi->serial->fd, CMD_CAPTURE_SIZE,
 683             data) != SIGROK_OK)
 684                 return SIGROK_ERR;
 685
 686         /*
 687          * Enable/disable channel groups in the flag register according to the
 688          * probe mask. The register stores them backwards, hence shift right
 689          * from 1000.
 690          */
 691         changrp_mask = 0;
 692         for (i = 0; i < 4; i++) {
 693                 if (probe_mask & (0xff << (i * 8)))
 694                         changrp_mask |= (8 >> i);
 695         }
 696
 697         /* The flag register wants them here, and 1 means "disable channel". */
 698         flag_reg |= ~(changrp_mask << 2) & 0x3c;
 699
 700         data = flag_reg << 24;
 701         if (send_longcommand(sdi->serial->fd, CMD_SET_FLAGS, data) != SIGROK_OK)
 702                 return SIGROK_ERR;
 703
 704         /* Start acquisition on the device. */
 705         if (send_shortcommand(sdi->serial->fd, CMD_RUN) != SIGROK_OK)
 706                 return SIGROK_ERR;
 707
 708         source_add(sdi->serial->fd, G_IO_IN, -1, receive_data,
 709                    session_device_id);
 710
 711         /* Send header packet to the session bus. */
 712         packet = g_malloc(sizeof(struct datafeed_packet));
 713         header = g_malloc(sizeof(struct datafeed_header));
 714         if (!packet || !header)
 715                 return SIGROK_ERR;
 716         packet->type = DF_HEADER;
 717         packet->length = sizeof(struct datafeed_header);
 718         packet->payload = (unsigned char *)header;
 719         header->feed_version = 1;
 720         gettimeofday(&header->starttime, NULL);
 721         header->samplerate = cur_samplerate;
 722         header->protocol_id = PROTO_RAW;
 723         header->num_probes = NUM_PROBES;
 724         session_bus(session_device_id, packet);
 725         g_free(header);
 726         g_free(packet);
 727
 728         return SIGROK_OK;
 729 }
 730
 731 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 732 {
 733         struct datafeed_packet packet;
 734
 735         /* QUICK HACK */
 736         device_index = device_index;
 737
 738         packet.type = DF_END;
 739         packet.length = 0;
 740         session_bus(session_device_id, &packet);
 741 }
 742
 743 struct device_plugin ols_plugin_info = {
 744         "sump",
 745         1,
 746         hw_init,
 747         hw_cleanup,
 748         hw_opendev,
 749         hw_closedev,
 750         hw_get_device_info,
 751         hw_get_status,
 752         hw_get_capabilities,
 753         hw_set_configuration,
 754         hw_start_acquisition,
 755         hw_stop_acquisition,
 756 };