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 #ifdef _WIN32
  42 #define O_NONBLOCK FIONBIO
  43 #endif
  44
  45 #define NUM_PROBES                      32
  46 #define NUM_TRIGGER_STAGES              4
  47 #define TRIGGER_TYPES                   "01"
  48 #define SERIAL_SPEED                    B115200
  49 #define CLOCK_RATE                      100000000
  50
  51 /* Command opcodes */
  52 #define CMD_RESET                       0x00
  53 #define CMD_ID                          0x02
  54 #define CMD_SET_FLAGS                   0x82
  55 #define CMD_SET_DIVIDER                 0x80
  56 #define CMD_RUN                         0x01
  57 #define CMD_CAPTURE_SIZE                0x81
  58 #define CMD_SET_TRIGGER_MASK_0          0xc0
  59 #define CMD_SET_TRIGGER_MASK_1          0xc4
  60 #define CMD_SET_TRIGGER_MASK_2          0xc8
  61 #define CMD_SET_TRIGGER_MASK_3          0xcc
  62 #define CMD_SET_TRIGGER_VALUE_0         0xc1
  63 #define CMD_SET_TRIGGER_VALUE_1         0xc5
  64 #define CMD_SET_TRIGGER_VALUE_2         0xc9
  65 #define CMD_SET_TRIGGER_VALUE_3         0xcd
  66 #define CMD_SET_TRIGGER_CONFIG_0        0xc2
  67 #define CMD_SET_TRIGGER_CONFIG_1        0xc6
  68 #define CMD_SET_TRIGGER_CONFIG_2        0xca
  69 #define CMD_SET_TRIGGER_CONFIG_3        0xce
  70
  71 /* Bitmasks for CMD_FLAGS */
  72 #define FLAG_DEMUX                      0x01
  73 #define FLAG_FILTER                     0x02
  74 #define FLAG_CHANNELGROUP_1             0x04
  75 #define FLAG_CHANNELGROUP_2             0x08
  76 #define FLAG_CHANNELGROUP_3             0x10
  77 #define FLAG_CHANNELGROUP_4             0x20
  78 #define FLAG_CLOCK_EXTERNAL             0x40
  79 #define FLAG_CLOCK_INVERTED             0x80
  80 #define FLAG_RLE                        0x0100
  81
  82 static int capabilities[] = {
  83         HWCAP_LOGIC_ANALYZER,
  84         HWCAP_SAMPLERATE,
  85         HWCAP_CAPTURE_RATIO,
  86         HWCAP_LIMIT_SAMPLES,
  87         0,
  88 };
  89
  90 static struct samplerates samplerates = {
  91         10,
  92         MHZ(200),
  93         1,
  94         0,
  95 };
  96
  97 /* List of struct serial_device_instance */
  98 static GSList *device_instances = NULL;
  99
 100 /* Current state of the flag register */
 101 static uint32_t flag_reg = 0;
 102
 103 static uint64_t cur_samplerate = 0;
 104 static uint64_t limit_samples = 0;
 105 /*
 106  * Pre/post trigger capture ratio, in percentage.
 107  * 0 means no pre-trigger data.
 108  */
 109 static int capture_ratio = 0;
 110 static int trigger_at = -1;
 111 static uint32_t probe_mask = 0xffffffff;
 112 static uint32_t trigger_mask[4] = { 0, 0, 0, 0 };
 113 static uint32_t trigger_value[4] = { 0, 0, 0, 0 };
 114 static int num_stages = 0;
 115
 116 static int send_shortcommand(int fd, uint8_t command)
 117 {
 118         char buf[1];
 119
 120         g_debug("ols: sending cmd 0x%.2x", command);
 121         buf[0] = command;
 122         if (serial_write(fd, buf, 1) != 1)
 123                 return SIGROK_ERR;
 124
 125         return SIGROK_OK;
 126 }
 127
 128 static int send_longcommand(int fd, uint8_t command, uint32_t data)
 129 {
 130         char buf[5];
 131
 132         g_debug("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
 133         buf[0] = command;
 134         buf[1] = (data & 0xff000000) >> 24;
 135         buf[2] = (data & 0xff0000) >> 16;
 136         buf[3] = (data & 0xff00) >> 8;
 137         buf[4] = data & 0xff;
 138         if (serial_write(fd, buf, 5) != 5)
 139                 return SIGROK_ERR;
 140
 141         return SIGROK_OK;
 142 }
 143
 144 static int configure_probes(GSList *probes)
 145 {
 146         struct probe *probe;
 147         GSList *l;
 148         int probe_bit, stage, i;
 149         char *tc;
 150
 151         probe_mask = 0;
 152         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 153                 trigger_mask[i] = 0;
 154                 trigger_value[i] = 0;
 155         }
 156
 157         num_stages = 0;
 158         for (l = probes; l; l = l->next) {
 159                 probe = (struct probe *)l->data;
 160                 if (!probe->enabled)
 161                         continue;
 162
 163                 /*
 164                  * Set up the probe mask for later configuration into the
 165                  * flag register.
 166                  */
 167                 probe_bit = 1 << (probe->index - 1);
 168                 probe_mask |= probe_bit;
 169
 170                 if (!probe->trigger)
 171                         continue;
 172
 173                 /* Configure trigger mask and value. */
 174                 stage = 0;
 175                 for (tc = probe->trigger; tc && *tc; tc++) {
 176                         trigger_mask[stage] |= probe_bit;
 177                         if (*tc == '1')
 178                                 trigger_value[stage] |= probe_bit;
 179                         stage++;
 180                         if (stage > 3)
 181                                 /*
 182                                  * TODO: Only supporting parallel mode, with
 183                                  * up to 4 stages.
 184                                  */
 185                                 return SIGROK_ERR;
 186                 }
 187                 if (stage > num_stages)
 188                         num_stages = stage;
 189         }
 190
 191         return SIGROK_OK;
 192 }
 193
 194 static uint32_t reverse16(uint32_t in)
 195 {
 196         uint32_t out;
 197
 198         out = (in & 0xff) << 8;
 199         out |= (in & 0xff00) >> 8;
 200         out |= (in & 0xff0000) << 8;
 201         out |= (in & 0xff000000) >> 8;
 202
 203         return out;
 204 }
 205
 206 static uint32_t reverse32(uint32_t in)
 207 {
 208         uint32_t out;
 209
 210         out = (in & 0xff) << 24;
 211         out |= (in & 0xff00) << 8;
 212         out |= (in & 0xff0000) >> 8;
 213         out |= (in & 0xff000000) >> 24;
 214
 215         return out;
 216 }
 217
 218 static int hw_init(char *deviceinfo)
 219 {
 220         struct sigrok_device_instance *sdi;
 221         GSList *ports, *l;
 222         GPollFD *fds;
 223         int devcnt, final_devcnt, num_ports, fd, ret, i;
 224         char buf[8], **device_names, **serial_params;
 225
 226         if (deviceinfo)
 227                 ports = g_slist_append(NULL, strdup(deviceinfo));
 228         else
 229                 /* No specific device given, so scan all serial ports. */
 230                 ports = list_serial_ports();
 231
 232         num_ports = g_slist_length(ports);
 233         fds = calloc(1, num_ports * sizeof(GPollFD));
 234         device_names = malloc(num_ports * sizeof(char *));
 235         serial_params = malloc(num_ports * sizeof(char *));
 236         devcnt = 0;
 237         for (l = ports; l; l = l->next) {
 238                 /* The discovery procedure is like this: first send the Reset
 239                  * command (0x00) 5 times, since the device could be anywhere
 240                  * in a 5-byte command. Then send the ID command (0x02).
 241                  * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 242                  * have a match.
 243                  *
 244                  * Since it may take the device a while to respond at 115Kb/s,
 245                  * we do all the sending first, then wait for all of them to
 246                  * respond with g_poll().
 247                  */
 248                 g_message("ols: probing %s...", (char *)l->data);
 249                 fd = serial_open(l->data, O_RDWR | O_NONBLOCK);
 250                 if (fd != -1) {
 251                         serial_params[devcnt] = serial_backup_params(fd);
 252                         serial_set_params(fd, 115200, 8, 0, 1, 2);
 253                         ret = SIGROK_OK;
 254                         for (i = 0; i < 5; i++) {
 255                                 if ((ret = send_shortcommand(fd,
 256                                         CMD_RESET)) != SIGROK_OK) {
 257                                         /* Serial port is not writable. */
 258                                         break;
 259                                 }
 260                         }
 261                         if (ret != SIGROK_OK) {
 262                                 serial_restore_params(fd,
 263                                         serial_params[devcnt]);
 264                                 serial_close(fd);
 265                                 continue;
 266                         }
 267                         send_shortcommand(fd, CMD_ID);
 268                         fds[devcnt].fd = fd;
 269                         fds[devcnt].events = G_IO_IN;
 270                         device_names[devcnt] = strdup(l->data);
 271                         devcnt++;
 272                 }
 273                 free(l->data);
 274         }
 275
 276         /* 2ms isn't enough for reliable transfer with pl2303, let's try 10 */
 277         usleep(10000);
 278
 279         final_devcnt = 0;
 280         g_poll(fds, devcnt, 1);
 281         for (i = 0; i < devcnt; i++) {
 282                 if (fds[i].revents == G_IO_IN) {
 283                         if (serial_read(fds[i].fd, buf, 4) == 4) {
 284                                 if (!strncmp(buf, "1SLO", 4)
 285                                     || !strncmp(buf, "1ALS", 4)) {
 286                                         if (!strncmp(buf, "1SLO", 4))
 287                                                 sdi = sigrok_device_instance_new
 288                                                     (final_devcnt, ST_INACTIVE,
 289                                                      "Openbench",
 290                                                      "Logic Sniffer", "v1.0");
 291                                         else
 292                                                 sdi = sigrok_device_instance_new
 293                                                     (final_devcnt, ST_INACTIVE,
 294                                                      "Openbench", "Logic Sniffer",
 295                                                      "v1.0");
 296                                         sdi->serial = serial_device_instance_new
 297                                             (device_names[i], -1);
 298                                         device_instances =
 299                                             g_slist_append(device_instances, sdi);
 300                                         final_devcnt++;
 301                                         serial_close(fds[i].fd);
 302                                         fds[i].fd = 0;
 303                                 }
 304                         }
 305                         free(device_names[i]);
 306                 }
 307
 308                 if (fds[i].fd != 0) {
 309                         serial_restore_params(fds[i].fd, serial_params[i]);
 310                         serial_close(fds[i].fd);
 311                 }
 312                 free(serial_params[i]);
 313         }
 314
 315         free(fds);
 316         free(device_names);
 317         free(serial_params);
 318         g_slist_free(ports);
 319
 320         cur_samplerate = samplerates.low;
 321
 322         return final_devcnt;
 323 }
 324
 325 static int hw_opendev(int device_index)
 326 {
 327         struct sigrok_device_instance *sdi;
 328
 329         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 330                 return SIGROK_ERR;
 331
 332         sdi->serial->fd = serial_open(sdi->serial->port, O_RDWR);
 333         if (sdi->serial->fd == -1)
 334                 return SIGROK_ERR;
 335
 336         sdi->status = ST_ACTIVE;
 337
 338         return SIGROK_OK;
 339 }
 340
 341 static void hw_closedev(int device_index)
 342 {
 343         struct sigrok_device_instance *sdi;
 344
 345         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 346                 return;
 347
 348         if (sdi->serial->fd != -1) {
 349                 serial_close(sdi->serial->fd);
 350                 sdi->serial->fd = -1;
 351                 sdi->status = ST_INACTIVE;
 352         }
 353 }
 354
 355 static void hw_cleanup(void)
 356 {
 357         GSList *l;
 358         struct sigrok_device_instance *sdi;
 359
 360         /* Properly close all devices. */
 361         for (l = device_instances; l; l = l->next) {
 362                 sdi = l->data;
 363                 if (sdi->serial->fd != -1)
 364                         serial_close(sdi->serial->fd);
 365                 sigrok_device_instance_free(sdi);
 366         }
 367         g_slist_free(device_instances);
 368         device_instances = NULL;
 369 }
 370
 371 static void *hw_get_device_info(int device_index, int device_info_id)
 372 {
 373         struct sigrok_device_instance *sdi;
 374         void *info;
 375
 376         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 377                 return NULL;
 378
 379         info = NULL;
 380         switch (device_info_id) {
 381         case DI_INSTANCE:
 382                 info = sdi;
 383                 break;
 384         case DI_NUM_PROBES:
 385                 info = GINT_TO_POINTER(NUM_PROBES);
 386                 break;
 387         case DI_SAMPLERATES:
 388                 info = &samplerates;
 389                 break;
 390         case DI_TRIGGER_TYPES:
 391                 info = (char *)TRIGGER_TYPES;
 392                 break;
 393         case DI_CUR_SAMPLERATE:
 394                 info = &cur_samplerate;
 395                 break;
 396         }
 397
 398         return info;
 399 }
 400
 401 static int hw_get_status(int device_index)
 402 {
 403         struct sigrok_device_instance *sdi;
 404
 405         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 406                 return ST_NOT_FOUND;
 407
 408         return sdi->status;
 409 }
 410
 411 static int *hw_get_capabilities(void)
 412 {
 413         return capabilities;
 414 }
 415
 416 static int set_configuration_samplerate(struct sigrok_device_instance *sdi,
 417                                         uint64_t samplerate)
 418 {
 419         uint32_t divider;
 420
 421         if (samplerate < samplerates.low || samplerate > samplerates.high)
 422                 return SIGROK_ERR_SAMPLERATE;
 423
 424         if (samplerate > CLOCK_RATE) {
 425                 flag_reg |= FLAG_DEMUX;
 426                 divider = (CLOCK_RATE * 2 / samplerate) - 1;
 427         } else {
 428                 flag_reg &= ~FLAG_DEMUX;
 429                 divider = (CLOCK_RATE / samplerate) - 1;
 430         }
 431
 432         g_message("ols: setting samplerate to %" PRIu64 " Hz (divider %u, demux %s)",
 433                         samplerate, divider, flag_reg & FLAG_DEMUX ? "on" : "off");
 434
 435         if (send_longcommand(sdi->serial->fd, CMD_SET_DIVIDER, reverse32(divider)) != SIGROK_OK)
 436                 return SIGROK_ERR;
 437         cur_samplerate = samplerate;
 438
 439         return SIGROK_OK;
 440 }
 441
 442 static int hw_set_configuration(int device_index, int capability, void *value)
 443 {
 444         struct sigrok_device_instance *sdi;
 445         int ret;
 446         uint64_t *tmp_u64;
 447
 448         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 449                 return SIGROK_ERR;
 450
 451         if (sdi->status != ST_ACTIVE)
 452                 return SIGROK_ERR;
 453
 454         switch (capability) {
 455         case HWCAP_SAMPLERATE:
 456                 tmp_u64 = value;
 457                 ret = set_configuration_samplerate(sdi, *tmp_u64);
 458                 break;
 459         case HWCAP_PROBECONFIG:
 460                 ret = configure_probes((GSList *) value);
 461                 break;
 462         case HWCAP_LIMIT_SAMPLES:
 463                 tmp_u64 = value;
 464                 limit_samples = *tmp_u64;
 465                 g_message("ols: sample limit %" PRIu64, limit_samples);
 466                 ret = SIGROK_OK;
 467                 break;
 468         case HWCAP_CAPTURE_RATIO:
 469                 tmp_u64 = value;
 470                 capture_ratio = *tmp_u64;
 471                 if (capture_ratio < 0 || capture_ratio > 100) {
 472                         capture_ratio = 0;
 473                         ret = SIGROK_ERR;
 474                 } else
 475                         ret = SIGROK_OK;
 476                 break;
 477         default:
 478                 ret = SIGROK_ERR;
 479         }
 480
 481         return ret;
 482 }
 483
 484 static int receive_data(int fd, int revents, void *user_data)
 485 {
 486         static unsigned int num_transfers = 0;
 487         static int num_bytes = 0;
 488         static char last_sample[4] = { 0xff, 0xff, 0xff, 0xff };
 489         static unsigned char sample[4] = { 0, 0, 0, 0 };
 490         static unsigned char tmp_sample[4];
 491         static unsigned char *raw_sample_buf = NULL;
 492         int count, buflen, num_channels, offset, i, j;
 493         struct datafeed_packet packet;
 494         unsigned char byte, *buffer;
 495
 496         if (num_transfers++ == 0) {
 497                 /*
 498                  * First time round, means the device started sending data,
 499                  * and will not stop until done. If it stops sending for
 500                  * longer than it takes to send a byte, that means it's
 501                  * finished. We'll double that to 30ms to be sure...
 502                  */
 503                 source_remove(fd);
 504                 source_add(fd, G_IO_IN, 30, receive_data, user_data);
 505                 raw_sample_buf = malloc(limit_samples * 4);
 506                 /* fill with 1010... for debugging */
 507                 memset(raw_sample_buf, 0x82, limit_samples * 4);
 508         }
 509
 510         num_channels = 0;
 511         for (i = 0x20; i > 0x02; i /= 2) {
 512                 if ((flag_reg & i) == 0)
 513                         num_channels++;
 514         }
 515
 516         if (revents == G_IO_IN
 517             && num_transfers / num_channels <= limit_samples) {
 518                 if (serial_read(fd, &byte, 1) != 1)
 519                         return FALSE;
 520
 521                 sample[num_bytes++] = byte;
 522                 g_debug("ols: received byte 0x%.2x", byte);
 523                 if (num_bytes == num_channels) {
 524                         g_debug("ols: received sample 0x%.*x", num_bytes * 2, (int) *sample);
 525                         /* Got a full sample. */
 526                         if (flag_reg & FLAG_RLE) {
 527                                 /*
 528                                  * In RLE mode -1 should never come in as a
 529                                  * sample, because bit 31 is the "count" flag.
 530                                  * TODO: Endianness may be wrong here, could be
 531                                  * sample[3].
 532                                  */
 533                                 if (sample[0] & 0x80
 534                                     && !(last_sample[0] & 0x80)) {
 535                                         count = (int)(*sample) & 0x7fffffff;
 536                                         buffer = g_malloc(count);
 537                                         buflen = 0;
 538                                         for (i = 0; i < count; i++) {
 539                                                 memcpy(buffer + buflen, last_sample, 4);
 540                                                 buflen += 4;
 541                                         }
 542                                 } else {
 543                                         /*
 544                                          * Just a single sample, next sample
 545                                          * will probably be a count referring
 546                                          * to this -- but this one is still a
 547                                          * part of the stream.
 548                                          */
 549                                         buffer = sample;
 550                                         buflen = 4;
 551                                 }
 552                         } else {
 553                                 /* No compression. */
 554                                 buffer = sample;
 555                                 buflen = 4;
 556                         }
 557
 558                         if (num_channels < 4) {
 559                                 /*
 560                                  * Some channel groups may have been turned
 561                                  * off, to speed up transfer between the
 562                                  * hardware and the PC. Expand that here before
 563                                  * submitting it over the session bus --
 564                                  * whatever is listening on the bus will be
 565                                  * expecting a full 32-bit sample, based on
 566                                  * the number of probes.
 567                                  */
 568                                 j = 0;
 569                                 memset(tmp_sample, 0, 4);
 570                                 for (i = 0; i < 4; i++) {
 571                                         if (((flag_reg >> 2) & (1 << i)) == 0) {
 572                                                 /*
 573                                                  * This channel group was
 574                                                  * enabled, copy from received
 575                                                  * sample.
 576                                                  */
 577                                                 tmp_sample[i] = sample[j++];
 578                                         }
 579                                 }
 580                                 memcpy(sample, tmp_sample, 4);
 581                                 g_debug("ols: full sample 0x%.8x", (int) *sample);
 582                         }
 583
 584                         /* the OLS sends its sample buffer backwards.
 585                          * store it in reverse order here, so we can dump
 586                          * this on the session bus later.
 587                          */
 588                         offset = (limit_samples - num_transfers / num_channels) * 4;
 589                         memcpy(raw_sample_buf + offset, sample, 4);
 590
 591                         if (buffer == sample)
 592                                 memcpy(last_sample, buffer, num_channels);
 593                         else
 594                                 g_free(buffer);
 595
 596                         memset(sample, 0, 4);
 597                         num_bytes = 0;
 598                 }
 599         } else {
 600                 /*
 601                  * This is the main loop telling us a timeout was reached, or
 602                  * we've acquired all the samples we asked for -- we're done.
 603                  * Send the (properly-ordered) buffer to the frontend.
 604                  */
 605                 if (trigger_at != -1) {
 606                         /* a trigger was set up, so we need to tell the frontend
 607                          * about it.
 608                          */
 609                         if (trigger_at > 0) {
 610                                 /* there are pre-trigger samples, send those first */
 611                                 packet.type = DF_LOGIC;
 612                                 packet.length = trigger_at * 4;
 613                                 packet.unitsize = 4;
 614                                 packet.payload = raw_sample_buf;
 615                                 session_bus(user_data, &packet);
 616                         }
 617
 618                         packet.type = DF_TRIGGER;
 619                         packet.length = 0;
 620                         session_bus(user_data, &packet);
 621
 622                         packet.type = DF_LOGIC;
 623                         packet.length = (limit_samples * 4) - (trigger_at * 4);
 624                         packet.unitsize = 4;
 625                         packet.payload = raw_sample_buf + trigger_at * 4;
 626                         session_bus(user_data, &packet);
 627                 } else {
 628                         packet.type = DF_LOGIC;
 629                         packet.length = limit_samples * 4;
 630                         packet.unitsize = 4;
 631                         packet.payload = raw_sample_buf;
 632                         session_bus(user_data, &packet);
 633                 }
 634                 free(raw_sample_buf);
 635
 636                 serial_flush(fd);
 637                 serial_close(fd);
 638                 packet.type = DF_END;
 639                 packet.length = 0;
 640                 session_bus(user_data, &packet);
 641         }
 642
 643         return TRUE;
 644 }
 645
 646 static int hw_start_acquisition(int device_index, gpointer session_device_id)
 647 {
 648         int i;
 649         struct datafeed_packet *packet;
 650         struct datafeed_header *header;
 651         struct sigrok_device_instance *sdi;
 652         uint32_t trigger_config[4];
 653         uint32_t data;
 654         uint16_t readcount, delaycount;
 655         uint8_t changrp_mask;
 656
 657         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 658                 return SIGROK_ERR;
 659
 660         if (sdi->status != ST_ACTIVE)
 661                 return SIGROK_ERR;
 662
 663         readcount = limit_samples / 4;
 664
 665         memset(trigger_config, 0, 16);
 666         trigger_config[num_stages-1] |= 0x08;
 667         if (trigger_mask[0]) {
 668                 delaycount = readcount * (1 - capture_ratio / 100.0);
 669                 trigger_at = (readcount - delaycount) * 4 - num_stages;
 670
 671                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 672                         reverse32(trigger_mask[0])) != SIGROK_OK)
 673                         return SIGROK_ERR;
 674                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 675                         reverse32(trigger_value[0])) != SIGROK_OK)
 676                         return SIGROK_ERR;
 677                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 678                         trigger_config[0]) != SIGROK_OK)
 679                         return SIGROK_ERR;
 680
 681                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_1,
 682                         reverse32(trigger_mask[1])) != SIGROK_OK)
 683                         return SIGROK_ERR;
 684                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_1,
 685                         reverse32(trigger_value[1])) != SIGROK_OK)
 686                         return SIGROK_ERR;
 687                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_1,
 688                         trigger_config[1]) != SIGROK_OK)
 689                         return SIGROK_ERR;
 690
 691                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_2,
 692                         reverse32(trigger_mask[2])) != SIGROK_OK)
 693                         return SIGROK_ERR;
 694                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_2,
 695                         reverse32(trigger_value[2])) != SIGROK_OK)
 696                         return SIGROK_ERR;
 697                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_2,
 698                         trigger_config[2]) != SIGROK_OK)
 699                         return SIGROK_ERR;
 700
 701                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_3,
 702                         reverse32(trigger_mask[3])) != SIGROK_OK)
 703                         return SIGROK_ERR;
 704                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_3,
 705                         reverse32(trigger_value[3])) != SIGROK_OK)
 706                         return SIGROK_ERR;
 707                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_3,
 708                         trigger_config[3]) != SIGROK_OK)
 709                         return SIGROK_ERR;
 710         } else {
 711                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 712                      trigger_mask[0]) != SIGROK_OK)
 713                         return SIGROK_ERR;
 714                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 715                      trigger_value[0]) != SIGROK_OK)
 716                         return SIGROK_ERR;
 717                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 718                      0x00000008) != SIGROK_OK)
 719                         return SIGROK_ERR;
 720                 delaycount = readcount;
 721         }
 722
 723         set_configuration_samplerate(sdi, cur_samplerate);
 724
 725         /* Send sample limit and pre/post-trigger capture ratio. */
 726         data = ((readcount - 1) & 0xffff) << 16;
 727         data |= (delaycount - 1) & 0xffff;
 728         if (send_longcommand(sdi->serial->fd, CMD_CAPTURE_SIZE, reverse16(data)) != SIGROK_OK)
 729                 return SIGROK_ERR;
 730
 731         /*
 732          * Enable/disable channel groups in the flag register according to the
 733          * probe mask.
 734          */
 735         changrp_mask = 0;
 736         for (i = 0; i < 4; i++) {
 737                 if (probe_mask & (0xff << (i * 8)))
 738                         changrp_mask |= (1 << i);
 739         }
 740
 741         /* The flag register wants them here, and 1 means "disable channel". */
 742         flag_reg |= ~(changrp_mask << 2) & 0x3c;
 743         flag_reg |= FLAG_FILTER;
 744         data = flag_reg << 24;
 745         if (send_longcommand(sdi->serial->fd, CMD_SET_FLAGS, data) != SIGROK_OK)
 746                 return SIGROK_ERR;
 747
 748         /* Start acquisition on the device. */
 749         if (send_shortcommand(sdi->serial->fd, CMD_RUN) != SIGROK_OK)
 750                 return SIGROK_ERR;
 751
 752         source_add(sdi->serial->fd, G_IO_IN, -1, receive_data,
 753                    session_device_id);
 754
 755         /* Send header packet to the session bus. */
 756         packet = g_malloc(sizeof(struct datafeed_packet));
 757         header = g_malloc(sizeof(struct datafeed_header));
 758         if (!packet || !header)
 759                 return SIGROK_ERR;
 760         packet->type = DF_HEADER;
 761         packet->length = sizeof(struct datafeed_header);
 762         packet->payload = (unsigned char *)header;
 763         header->feed_version = 1;
 764         gettimeofday(&header->starttime, NULL);
 765         header->samplerate = cur_samplerate;
 766         header->protocol_id = PROTO_RAW;
 767         header->num_logic_probes = NUM_PROBES;
 768         header->num_analog_probes = 0;
 769         session_bus(session_device_id, packet);
 770         g_free(header);
 771         g_free(packet);
 772
 773         return SIGROK_OK;
 774 }
 775
 776 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 777 {
 778         struct datafeed_packet packet;
 779
 780         /* Avoid compiler warnings. */
 781         device_index = device_index;
 782
 783         packet.type = DF_END;
 784         packet.length = 0;
 785         session_bus(session_device_id, &packet);
 786 }
 787
 788 struct device_plugin ols_plugin_info = {
 789         "ols",
 790         1,
 791         hw_init,
 792         hw_cleanup,
 793         hw_opendev,
 794         hw_closedev,
 795         hw_get_device_info,
 796         hw_get_status,
 797         hw_get_capabilities,
 798         hw_set_configuration,
 799         hw_start_acquisition,
 800         hw_stop_acquisition,
 801 };