hardware/openbench-logic-sniffer/ols.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2010 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdint.h>
  22 #include <stdlib.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include <unistd.h>
  27 #ifndef _WIN32
  28 #include <termios.h>
  29 #endif
  30 #include <string.h>
  31 #include <sys/time.h>
  32 #include <inttypes.h>
  33 #ifdef _WIN32
  34 /* TODO */
  35 #else
  36 #include <arpa/inet.h>
  37 #endif
  38 #include <glib.h>
  39 #include <sigrok.h>
  40 #include <sigrok-internal.h>
  41
  42 #ifdef _WIN32
  43 #define O_NONBLOCK FIONBIO
  44 #endif
  45
  46 #define NUM_PROBES                      32
  47 #define NUM_TRIGGER_STAGES              4
  48 #define TRIGGER_TYPES                   "01"
  49 #define SERIAL_SPEED                    B115200
  50 #define CLOCK_RATE                      100000000
  51
  52 /* Command opcodes */
  53 #define CMD_RESET                       0x00
  54 #define CMD_ID                          0x02
  55 #define CMD_SET_FLAGS                   0x82
  56 #define CMD_SET_DIVIDER                 0x80
  57 #define CMD_RUN                         0x01
  58 #define CMD_CAPTURE_SIZE                0x81
  59 #define CMD_SET_TRIGGER_MASK_0          0xc0
  60 #define CMD_SET_TRIGGER_MASK_1          0xc4
  61 #define CMD_SET_TRIGGER_MASK_2          0xc8
  62 #define CMD_SET_TRIGGER_MASK_3          0xcc
  63 #define CMD_SET_TRIGGER_VALUE_0         0xc1
  64 #define CMD_SET_TRIGGER_VALUE_1         0xc5
  65 #define CMD_SET_TRIGGER_VALUE_2         0xc9
  66 #define CMD_SET_TRIGGER_VALUE_3         0xcd
  67 #define CMD_SET_TRIGGER_CONFIG_0        0xc2
  68 #define CMD_SET_TRIGGER_CONFIG_1        0xc6
  69 #define CMD_SET_TRIGGER_CONFIG_2        0xca
  70 #define CMD_SET_TRIGGER_CONFIG_3        0xce
  71
  72 /* Bitmasks for CMD_FLAGS */
  73 #define FLAG_DEMUX                      0x01
  74 #define FLAG_FILTER                     0x02
  75 #define FLAG_CHANNELGROUP_1             0x04
  76 #define FLAG_CHANNELGROUP_2             0x08
  77 #define FLAG_CHANNELGROUP_3             0x10
  78 #define FLAG_CHANNELGROUP_4             0x20
  79 #define FLAG_CLOCK_EXTERNAL             0x40
  80 #define FLAG_CLOCK_INVERTED             0x80
  81 #define FLAG_RLE                        0x0100
  82
  83 static int capabilities[] = {
  84         HWCAP_LOGIC_ANALYZER,
  85         HWCAP_SAMPLERATE,
  86         HWCAP_CAPTURE_RATIO,
  87         HWCAP_LIMIT_SAMPLES,
  88         0,
  89 };
  90
  91 static struct samplerates samplerates = {
  92         10,
  93         MHZ(200),
  94         1,
  95         0,
  96 };
  97
  98 /* List of struct serial_device_instance */
  99 static GSList *device_instances = NULL;
 100
 101 /* Current state of the flag register */
 102 static uint32_t flag_reg = 0;
 103
 104 static uint64_t cur_samplerate = 0;
 105 static uint64_t limit_samples = 0;
 106 /*
 107  * Pre/post trigger capture ratio, in percentage.
 108  * 0 means no pre-trigger data.
 109  */
 110 static int capture_ratio = 0;
 111 static int trigger_at = -1;
 112 static uint32_t probe_mask = 0xffffffff;
 113 static uint32_t trigger_mask[4] = { 0, 0, 0, 0 };
 114 static uint32_t trigger_value[4] = { 0, 0, 0, 0 };
 115 static int num_stages = 0;
 116
 117 static int send_shortcommand(int fd, uint8_t command)
 118 {
 119         char buf[1];
 120
 121         g_debug("ols: sending cmd 0x%.2x", command);
 122         buf[0] = command;
 123         if (serial_write(fd, buf, 1) != 1)
 124                 return SIGROK_ERR;
 125
 126         return SIGROK_OK;
 127 }
 128
 129 static int send_longcommand(int fd, uint8_t command, uint32_t data)
 130 {
 131         char buf[5];
 132
 133         g_debug("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
 134         buf[0] = command;
 135         buf[1] = (data & 0xff000000) >> 24;
 136         buf[2] = (data & 0xff0000) >> 16;
 137         buf[3] = (data & 0xff00) >> 8;
 138         buf[4] = data & 0xff;
 139         if (serial_write(fd, buf, 5) != 5)
 140                 return SIGROK_ERR;
 141
 142         return SIGROK_OK;
 143 }
 144
 145 static int configure_probes(GSList *probes)
 146 {
 147         struct probe *probe;
 148         GSList *l;
 149         int probe_bit, stage, i;
 150         char *tc;
 151
 152         probe_mask = 0;
 153         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 154                 trigger_mask[i] = 0;
 155                 trigger_value[i] = 0;
 156         }
 157
 158         num_stages = 0;
 159         for (l = probes; l; l = l->next) {
 160                 probe = (struct probe *)l->data;
 161                 if (!probe->enabled)
 162                         continue;
 163
 164                 /*
 165                  * Set up the probe mask for later configuration into the
 166                  * flag register.
 167                  */
 168                 probe_bit = 1 << (probe->index - 1);
 169                 probe_mask |= probe_bit;
 170
 171                 if (!probe->trigger)
 172                         continue;
 173
 174                 /* Configure trigger mask and value. */
 175                 stage = 0;
 176                 for (tc = probe->trigger; tc && *tc; tc++) {
 177                         trigger_mask[stage] |= probe_bit;
 178                         if (*tc == '1')
 179                                 trigger_value[stage] |= probe_bit;
 180                         stage++;
 181                         if (stage > 3)
 182                                 /*
 183                                  * TODO: Only supporting parallel mode, with
 184                                  * up to 4 stages.
 185                                  */
 186                                 return SIGROK_ERR;
 187                 }
 188                 if (stage > num_stages)
 189                         num_stages = stage;
 190         }
 191
 192         return SIGROK_OK;
 193 }
 194
 195 static uint32_t reverse16(uint32_t in)
 196 {
 197         uint32_t out;
 198
 199         out = (in & 0xff) << 8;
 200         out |= (in & 0xff00) >> 8;
 201         out |= (in & 0xff0000) << 8;
 202         out |= (in & 0xff000000) >> 8;
 203
 204         return out;
 205 }
 206
 207 static uint32_t reverse32(uint32_t in)
 208 {
 209         uint32_t out;
 210
 211         out = (in & 0xff) << 24;
 212         out |= (in & 0xff00) << 8;
 213         out |= (in & 0xff0000) >> 8;
 214         out |= (in & 0xff000000) >> 24;
 215
 216         return out;
 217 }
 218
 219 static int hw_init(char *deviceinfo)
 220 {
 221         struct sigrok_device_instance *sdi;
 222         GSList *ports, *l;
 223         GPollFD *fds;
 224         int devcnt, final_devcnt, num_ports, fd, ret, i;
 225         char buf[8], **device_names, **serial_params;
 226
 227         if (deviceinfo)
 228                 ports = g_slist_append(NULL, strdup(deviceinfo));
 229         else
 230                 /* No specific device given, so scan all serial ports. */
 231                 ports = list_serial_ports();
 232
 233         num_ports = g_slist_length(ports);
 234         fds = calloc(1, num_ports * sizeof(GPollFD));
 235         device_names = malloc(num_ports * sizeof(char *));
 236         serial_params = malloc(num_ports * sizeof(char *));
 237         devcnt = 0;
 238         for (l = ports; l; l = l->next) {
 239                 /* The discovery procedure is like this: first send the Reset
 240                  * command (0x00) 5 times, since the device could be anywhere
 241                  * in a 5-byte command. Then send the ID command (0x02).
 242                  * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 243                  * have a match.
 244                  *
 245                  * Since it may take the device a while to respond at 115Kb/s,
 246                  * we do all the sending first, then wait for all of them to
 247                  * respond with g_poll().
 248                  */
 249                 g_message("ols: probing %s...", (char *)l->data);
 250                 fd = serial_open(l->data, O_RDWR | O_NONBLOCK);
 251                 if (fd != -1) {
 252                         serial_params[devcnt] = serial_backup_params(fd);
 253                         serial_set_params(fd, 115200, 8, 0, 1, 2);
 254                         ret = SIGROK_OK;
 255                         for (i = 0; i < 5; i++) {
 256                                 if ((ret = send_shortcommand(fd,
 257                                         CMD_RESET)) != SIGROK_OK) {
 258                                         /* Serial port is not writable. */
 259                                         break;
 260                                 }
 261                         }
 262                         if (ret != SIGROK_OK) {
 263                                 serial_restore_params(fd,
 264                                         serial_params[devcnt]);
 265                                 serial_close(fd);
 266                                 continue;
 267                         }
 268                         send_shortcommand(fd, CMD_ID);
 269                         fds[devcnt].fd = fd;
 270                         fds[devcnt].events = G_IO_IN;
 271                         device_names[devcnt] = strdup(l->data);
 272                         devcnt++;
 273                 }
 274                 free(l->data);
 275         }
 276
 277         /* 2ms isn't enough for reliable transfer with pl2303, let's try 10 */
 278         usleep(10000);
 279
 280         final_devcnt = 0;
 281         g_poll(fds, devcnt, 1);
 282         for (i = 0; i < devcnt; i++) {
 283                 if (fds[i].revents == G_IO_IN) {
 284                         if (serial_read(fds[i].fd, buf, 4) == 4) {
 285                                 if (!strncmp(buf, "1SLO", 4)
 286                                     || !strncmp(buf, "1ALS", 4)) {
 287                                         if (!strncmp(buf, "1SLO", 4))
 288                                                 sdi = sigrok_device_instance_new
 289                                                     (final_devcnt, ST_INACTIVE,
 290                                                      "Openbench",
 291                                                      "Logic Sniffer", "v1.0");
 292                                         else
 293                                                 sdi = sigrok_device_instance_new
 294                                                     (final_devcnt, ST_INACTIVE,
 295                                                      "Openbench", "Logic Sniffer",
 296                                                      "v1.0");
 297                                         sdi->serial = serial_device_instance_new
 298                                             (device_names[i], -1);
 299                                         device_instances =
 300                                             g_slist_append(device_instances, sdi);
 301                                         final_devcnt++;
 302                                         serial_close(fds[i].fd);
 303                                         fds[i].fd = 0;
 304                                 }
 305                         }
 306                         free(device_names[i]);
 307                 }
 308
 309                 if (fds[i].fd != 0) {
 310                         serial_restore_params(fds[i].fd, serial_params[i]);
 311                         serial_close(fds[i].fd);
 312                 }
 313                 free(serial_params[i]);
 314         }
 315
 316         free(fds);
 317         free(device_names);
 318         free(serial_params);
 319         g_slist_free(ports);
 320
 321         cur_samplerate = samplerates.low;
 322
 323         return final_devcnt;
 324 }
 325
 326 static int hw_opendev(int device_index)
 327 {
 328         struct sigrok_device_instance *sdi;
 329
 330         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 331                 return SIGROK_ERR;
 332
 333         sdi->serial->fd = serial_open(sdi->serial->port, O_RDWR);
 334         if (sdi->serial->fd == -1)
 335                 return SIGROK_ERR;
 336
 337         sdi->status = ST_ACTIVE;
 338
 339         return SIGROK_OK;
 340 }
 341
 342 static void hw_closedev(int device_index)
 343 {
 344         struct sigrok_device_instance *sdi;
 345
 346         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 347                 return;
 348
 349         if (sdi->serial->fd != -1) {
 350                 serial_close(sdi->serial->fd);
 351                 sdi->serial->fd = -1;
 352                 sdi->status = ST_INACTIVE;
 353         }
 354 }
 355
 356 static void hw_cleanup(void)
 357 {
 358         GSList *l;
 359         struct sigrok_device_instance *sdi;
 360
 361         /* Properly close all devices. */
 362         for (l = device_instances; l; l = l->next) {
 363                 sdi = l->data;
 364                 if (sdi->serial->fd != -1)
 365                         serial_close(sdi->serial->fd);
 366                 sigrok_device_instance_free(sdi);
 367         }
 368         g_slist_free(device_instances);
 369         device_instances = NULL;
 370 }
 371
 372 static void *hw_get_device_info(int device_index, int device_info_id)
 373 {
 374         struct sigrok_device_instance *sdi;
 375         void *info;
 376
 377         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 378                 return NULL;
 379
 380         info = NULL;
 381         switch (device_info_id) {
 382         case DI_INSTANCE:
 383                 info = sdi;
 384                 break;
 385         case DI_NUM_PROBES:
 386                 info = GINT_TO_POINTER(NUM_PROBES);
 387                 break;
 388         case DI_SAMPLERATES:
 389                 info = &samplerates;
 390                 break;
 391         case DI_TRIGGER_TYPES:
 392                 info = (char *)TRIGGER_TYPES;
 393                 break;
 394         case DI_CUR_SAMPLERATE:
 395                 info = &cur_samplerate;
 396                 break;
 397         }
 398
 399         return info;
 400 }
 401
 402 static int hw_get_status(int device_index)
 403 {
 404         struct sigrok_device_instance *sdi;
 405
 406         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 407                 return ST_NOT_FOUND;
 408
 409         return sdi->status;
 410 }
 411
 412 static int *hw_get_capabilities(void)
 413 {
 414         return capabilities;
 415 }
 416
 417 static int set_configuration_samplerate(struct sigrok_device_instance *sdi,
 418                                         uint64_t samplerate)
 419 {
 420         uint32_t divider;
 421
 422         if (samplerate < samplerates.low || samplerate > samplerates.high)
 423                 return SIGROK_ERR_SAMPLERATE;
 424
 425         if (samplerate > CLOCK_RATE) {
 426                 flag_reg |= FLAG_DEMUX;
 427                 divider = (CLOCK_RATE * 2 / samplerate) - 1;
 428         } else {
 429                 flag_reg &= ~FLAG_DEMUX;
 430                 divider = (CLOCK_RATE / samplerate) - 1;
 431         }
 432
 433         g_message("ols: setting samplerate to %" PRIu64 " Hz (divider %u, demux %s)",
 434                         samplerate, divider, flag_reg & FLAG_DEMUX ? "on" : "off");
 435
 436         if (send_longcommand(sdi->serial->fd, CMD_SET_DIVIDER, reverse32(divider)) != SIGROK_OK)
 437                 return SIGROK_ERR;
 438         cur_samplerate = samplerate;
 439
 440         return SIGROK_OK;
 441 }
 442
 443 static int hw_set_configuration(int device_index, int capability, void *value)
 444 {
 445         struct sigrok_device_instance *sdi;
 446         int ret;
 447         uint64_t *tmp_u64;
 448
 449         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 450                 return SIGROK_ERR;
 451
 452         if (sdi->status != ST_ACTIVE)
 453                 return SIGROK_ERR;
 454
 455         switch (capability) {
 456         case HWCAP_SAMPLERATE:
 457                 tmp_u64 = value;
 458                 ret = set_configuration_samplerate(sdi, *tmp_u64);
 459                 break;
 460         case HWCAP_PROBECONFIG:
 461                 ret = configure_probes((GSList *) value);
 462                 break;
 463         case HWCAP_LIMIT_SAMPLES:
 464                 tmp_u64 = value;
 465                 limit_samples = *tmp_u64;
 466                 g_message("ols: sample limit %" PRIu64, limit_samples);
 467                 ret = SIGROK_OK;
 468                 break;
 469         case HWCAP_CAPTURE_RATIO:
 470                 tmp_u64 = value;
 471                 capture_ratio = *tmp_u64;
 472                 if (capture_ratio < 0 || capture_ratio > 100) {
 473                         capture_ratio = 0;
 474                         ret = SIGROK_ERR;
 475                 } else
 476                         ret = SIGROK_OK;
 477                 break;
 478         default:
 479                 ret = SIGROK_ERR;
 480         }
 481
 482         return ret;
 483 }
 484
 485 static int receive_data(int fd, int revents, void *user_data)
 486 {
 487         static unsigned int num_transfers = 0;
 488         static int num_bytes = 0;
 489         static char last_sample[4] = { 0xff, 0xff, 0xff, 0xff };
 490         static unsigned char sample[4] = { 0, 0, 0, 0 };
 491         static unsigned char tmp_sample[4];
 492         static unsigned char *raw_sample_buf = NULL;
 493         int count, buflen, num_channels, offset, i, j;
 494         struct datafeed_packet packet;
 495         unsigned char byte, *buffer;
 496
 497         if (num_transfers++ == 0) {
 498                 /*
 499                  * First time round, means the device started sending data,
 500                  * and will not stop until done. If it stops sending for
 501                  * longer than it takes to send a byte, that means it's
 502                  * finished. We'll double that to 30ms to be sure...
 503                  */
 504                 source_remove(fd);
 505                 source_add(fd, G_IO_IN, 30, receive_data, user_data);
 506                 raw_sample_buf = malloc(limit_samples * 4);
 507                 /* fill with 1010... for debugging */
 508                 memset(raw_sample_buf, 0x82, limit_samples * 4);
 509         }
 510
 511         num_channels = 0;
 512         for (i = 0x20; i > 0x02; i /= 2) {
 513                 if ((flag_reg & i) == 0)
 514                         num_channels++;
 515         }
 516
 517         if (revents == G_IO_IN
 518             && num_transfers / num_channels <= limit_samples) {
 519                 if (serial_read(fd, &byte, 1) != 1)
 520                         return FALSE;
 521
 522                 sample[num_bytes++] = byte;
 523                 g_debug("ols: received byte 0x%.2x", byte);
 524                 if (num_bytes == num_channels) {
 525                         g_debug("ols: received sample 0x%.*x", num_bytes * 2, (int) *sample);
 526                         /* Got a full sample. */
 527                         if (flag_reg & FLAG_RLE) {
 528                                 /*
 529                                  * In RLE mode -1 should never come in as a
 530                                  * sample, because bit 31 is the "count" flag.
 531                                  * TODO: Endianness may be wrong here, could be
 532                                  * sample[3].
 533                                  */
 534                                 if (sample[0] & 0x80
 535                                     && !(last_sample[0] & 0x80)) {
 536                                         count = (int)(*sample) & 0x7fffffff;
 537                                         buffer = g_malloc(count);
 538                                         buflen = 0;
 539                                         for (i = 0; i < count; i++) {
 540                                                 memcpy(buffer + buflen, last_sample, 4);
 541                                                 buflen += 4;
 542                                         }
 543                                 } else {
 544                                         /*
 545                                          * Just a single sample, next sample
 546                                          * will probably be a count referring
 547                                          * to this -- but this one is still a
 548                                          * part of the stream.
 549                                          */
 550                                         buffer = sample;
 551                                         buflen = 4;
 552                                 }
 553                         } else {
 554                                 /* No compression. */
 555                                 buffer = sample;
 556                                 buflen = 4;
 557                         }
 558
 559                         if (num_channels < 4) {
 560                                 /*
 561                                  * Some channel groups may have been turned
 562                                  * off, to speed up transfer between the
 563                                  * hardware and the PC. Expand that here before
 564                                  * submitting it over the session bus --
 565                                  * whatever is listening on the bus will be
 566                                  * expecting a full 32-bit sample, based on
 567                                  * the number of probes.
 568                                  */
 569                                 j = 0;
 570                                 memset(tmp_sample, 0, 4);
 571                                 for (i = 0; i < 4; i++) {
 572                                         if (((flag_reg >> 2) & (1 << i)) == 0) {
 573                                                 /*
 574                                                  * This channel group was
 575                                                  * enabled, copy from received
 576                                                  * sample.
 577                                                  */
 578                                                 tmp_sample[i] = sample[j++];
 579                                         }
 580                                 }
 581                                 memcpy(sample, tmp_sample, 4);
 582                                 g_debug("ols: full sample 0x%.8x", (int) *sample);
 583                         }
 584
 585                         /* the OLS sends its sample buffer backwards.
 586                          * store it in reverse order here, so we can dump
 587                          * this on the session bus later.
 588                          */
 589                         offset = (limit_samples - num_transfers / num_channels) * 4;
 590                         memcpy(raw_sample_buf + offset, sample, 4);
 591
 592                         if (buffer == sample)
 593                                 memcpy(last_sample, buffer, num_channels);
 594                         else
 595                                 g_free(buffer);
 596
 597                         memset(sample, 0, 4);
 598                         num_bytes = 0;
 599                 }
 600         } else {
 601                 /*
 602                  * This is the main loop telling us a timeout was reached, or
 603                  * we've acquired all the samples we asked for -- we're done.
 604                  * Send the (properly-ordered) buffer to the frontend.
 605                  */
 606                 if (trigger_at != -1) {
 607                         /* a trigger was set up, so we need to tell the frontend
 608                          * about it.
 609                          */
 610                         if (trigger_at > 0) {
 611                                 /* there are pre-trigger samples, send those first */
 612                                 packet.type = DF_LOGIC;
 613                                 packet.length = trigger_at * 4;
 614                                 packet.unitsize = 4;
 615                                 packet.payload = raw_sample_buf;
 616                                 session_bus(user_data, &packet);
 617                         }
 618
 619                         packet.type = DF_TRIGGER;
 620                         packet.length = 0;
 621                         session_bus(user_data, &packet);
 622
 623                         packet.type = DF_LOGIC;
 624                         packet.length = (limit_samples * 4) - (trigger_at * 4);
 625                         packet.unitsize = 4;
 626                         packet.payload = raw_sample_buf + trigger_at * 4;
 627                         session_bus(user_data, &packet);
 628                 } else {
 629                         packet.type = DF_LOGIC;
 630                         packet.length = limit_samples * 4;
 631                         packet.unitsize = 4;
 632                         packet.payload = raw_sample_buf;
 633                         session_bus(user_data, &packet);
 634                 }
 635                 free(raw_sample_buf);
 636
 637                 serial_flush(fd);
 638                 serial_close(fd);
 639                 packet.type = DF_END;
 640                 packet.length = 0;
 641                 session_bus(user_data, &packet);
 642         }
 643
 644         return TRUE;
 645 }
 646
 647 static int hw_start_acquisition(int device_index, gpointer session_device_id)
 648 {
 649         int i;
 650         struct datafeed_packet *packet;
 651         struct datafeed_header *header;
 652         struct sigrok_device_instance *sdi;
 653         uint32_t trigger_config[4];
 654         uint32_t data;
 655         uint16_t readcount, delaycount;
 656         uint8_t changrp_mask;
 657
 658         if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 659                 return SIGROK_ERR;
 660
 661         if (sdi->status != ST_ACTIVE)
 662                 return SIGROK_ERR;
 663
 664         readcount = limit_samples / 4;
 665
 666         memset(trigger_config, 0, 16);
 667         trigger_config[num_stages-1] |= 0x08;
 668         if (trigger_mask[0]) {
 669                 delaycount = readcount * (1 - capture_ratio / 100.0);
 670                 trigger_at = (readcount - delaycount) * 4 - num_stages;
 671
 672                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 673                         reverse32(trigger_mask[0])) != SIGROK_OK)
 674                         return SIGROK_ERR;
 675                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 676                         reverse32(trigger_value[0])) != SIGROK_OK)
 677                         return SIGROK_ERR;
 678                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 679                         trigger_config[0]) != SIGROK_OK)
 680                         return SIGROK_ERR;
 681
 682                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_1,
 683                         reverse32(trigger_mask[1])) != SIGROK_OK)
 684                         return SIGROK_ERR;
 685                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_1,
 686                         reverse32(trigger_value[1])) != SIGROK_OK)
 687                         return SIGROK_ERR;
 688                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_1,
 689                         trigger_config[1]) != SIGROK_OK)
 690                         return SIGROK_ERR;
 691
 692                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_2,
 693                         reverse32(trigger_mask[2])) != SIGROK_OK)
 694                         return SIGROK_ERR;
 695                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_2,
 696                         reverse32(trigger_value[2])) != SIGROK_OK)
 697                         return SIGROK_ERR;
 698                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_2,
 699                         trigger_config[2]) != SIGROK_OK)
 700                         return SIGROK_ERR;
 701
 702                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_3,
 703                         reverse32(trigger_mask[3])) != SIGROK_OK)
 704                         return SIGROK_ERR;
 705                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_3,
 706                         reverse32(trigger_value[3])) != SIGROK_OK)
 707                         return SIGROK_ERR;
 708                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_3,
 709                         trigger_config[3]) != SIGROK_OK)
 710                         return SIGROK_ERR;
 711         } else {
 712                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0,
 713                      trigger_mask[0]) != SIGROK_OK)
 714                         return SIGROK_ERR;
 715                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 716                      trigger_value[0]) != SIGROK_OK)
 717                         return SIGROK_ERR;
 718                 if (send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 719                      0x00000008) != SIGROK_OK)
 720                         return SIGROK_ERR;
 721                 delaycount = readcount;
 722         }
 723
 724         set_configuration_samplerate(sdi, cur_samplerate);
 725
 726         /* Send sample limit and pre/post-trigger capture ratio. */
 727         data = ((readcount - 1) & 0xffff) << 16;
 728         data |= (delaycount - 1) & 0xffff;
 729         if (send_longcommand(sdi->serial->fd, CMD_CAPTURE_SIZE, reverse16(data)) != SIGROK_OK)
 730                 return SIGROK_ERR;
 731
 732         /*
 733          * Enable/disable channel groups in the flag register according to the
 734          * probe mask.
 735          */
 736         changrp_mask = 0;
 737         for (i = 0; i < 4; i++) {
 738                 if (probe_mask & (0xff << (i * 8)))
 739                         changrp_mask |= (1 << i);
 740         }
 741
 742         /* The flag register wants them here, and 1 means "disable channel". */
 743         flag_reg |= ~(changrp_mask << 2) & 0x3c;
 744         flag_reg |= FLAG_FILTER;
 745         data = flag_reg << 24;
 746         if (send_longcommand(sdi->serial->fd, CMD_SET_FLAGS, data) != SIGROK_OK)
 747                 return SIGROK_ERR;
 748
 749         /* Start acquisition on the device. */
 750         if (send_shortcommand(sdi->serial->fd, CMD_RUN) != SIGROK_OK)
 751                 return SIGROK_ERR;
 752
 753         source_add(sdi->serial->fd, G_IO_IN, -1, receive_data,
 754                    session_device_id);
 755
 756         /* Send header packet to the session bus. */
 757         packet = g_malloc(sizeof(struct datafeed_packet));
 758         header = g_malloc(sizeof(struct datafeed_header));
 759         if (!packet || !header)
 760                 return SIGROK_ERR;
 761         packet->type = DF_HEADER;
 762         packet->length = sizeof(struct datafeed_header);
 763         packet->payload = (unsigned char *)header;
 764         header->feed_version = 1;
 765         gettimeofday(&header->starttime, NULL);
 766         header->samplerate = cur_samplerate;
 767         header->protocol_id = PROTO_RAW;
 768         header->num_logic_probes = NUM_PROBES;
 769         header->num_analog_probes = 0;
 770         session_bus(session_device_id, packet);
 771         g_free(header);
 772         g_free(packet);
 773
 774         return SIGROK_OK;
 775 }
 776
 777 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 778 {
 779         struct datafeed_packet packet;
 780
 781         /* Avoid compiler warnings. */
 782         device_index = device_index;
 783
 784         packet.type = DF_END;
 785         packet.length = 0;
 786         session_bus(session_device_id, &packet);
 787 }
 788
 789 struct device_plugin ols_plugin_info = {
 790         "ols",
 791         1,
 792         hw_init,
 793         hw_cleanup,
 794         hw_opendev,
 795         hw_closedev,
 796         hw_get_device_info,
 797         hw_get_status,
 798         hw_get_capabilities,
 799         hw_set_configuration,
 800         hw_start_acquisition,
 801         hw_stop_acquisition,
 802 };