hardware/openbench-logic-sniffer/ols.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2010-2012 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 #ifdef _WIN32
  28 #include <windows.h>
  29 #else
  30 #include <termios.h>
  31 #endif
  32 #include <string.h>
  33 #include <sys/time.h>
  34 #include <inttypes.h>
  35 #ifdef _WIN32
  36 /* TODO */
  37 #else
  38 #include <arpa/inet.h>
  39 #endif
  40 #include <glib.h>
  41 #include "libsigrok.h"
  42 #include "libsigrok-internal.h"
  43 #include "ols.h"
  44
  45 #define SERIALCOMM "115200/8n1"
  46
  47 static const int hwcaps[] = {
  48         SR_HWCAP_LOGIC_ANALYZER,
  49         SR_HWCAP_SAMPLERATE,
  50         SR_HWCAP_CAPTURE_RATIO,
  51         SR_HWCAP_LIMIT_SAMPLES,
  52         SR_HWCAP_RLE,
  53         0,
  54 };
  55
  56 /* Probes are numbered 0-31 (on the PCB silkscreen). */
  57 static const char *probe_names[NUM_PROBES + 1] = {
  58         "0",
  59         "1",
  60         "2",
  61         "3",
  62         "4",
  63         "5",
  64         "6",
  65         "7",
  66         "8",
  67         "9",
  68         "10",
  69         "11",
  70         "12",
  71         "13",
  72         "14",
  73         "15",
  74         "16",
  75         "17",
  76         "18",
  77         "19",
  78         "20",
  79         "21",
  80         "22",
  81         "23",
  82         "24",
  83         "25",
  84         "26",
  85         "27",
  86         "28",
  87         "29",
  88         "30",
  89         "31",
  90         NULL,
  91 };
  92
  93 /* default supported samplerates, can be overridden by device metadata */
  94 static const struct sr_samplerates samplerates = {
  95         SR_HZ(10),
  96         SR_MHZ(200),
  97         SR_HZ(1),
  98         NULL,
  99 };
 100
 101 SR_PRIV struct sr_dev_driver ols_driver_info;
 102 static struct sr_dev_driver *odi = &ols_driver_info;
 103
 104 static int send_shortcommand(struct sr_serial_dev_inst *serial,
 105                 uint8_t command)
 106 {
 107         char buf[1];
 108
 109         sr_dbg("ols: sending cmd 0x%.2x", command);
 110         buf[0] = command;
 111         if (serial_write(serial, buf, 1) != 1)
 112                 return SR_ERR;
 113
 114         return SR_OK;
 115 }
 116
 117 static int send_longcommand(struct sr_serial_dev_inst *serial,
 118                 uint8_t command, uint32_t data)
 119 {
 120         char buf[5];
 121
 122         sr_dbg("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
 123         buf[0] = command;
 124         buf[1] = (data & 0xff000000) >> 24;
 125         buf[2] = (data & 0xff0000) >> 16;
 126         buf[3] = (data & 0xff00) >> 8;
 127         buf[4] = data & 0xff;
 128         if (serial_write(serial, buf, 5) != 5)
 129                 return SR_ERR;
 130
 131         return SR_OK;
 132 }
 133
 134 static int configure_probes(const struct sr_dev_inst *sdi)
 135 {
 136         struct dev_context *devc;
 137         const struct sr_probe *probe;
 138         const GSList *l;
 139         int probe_bit, stage, i;
 140         char *tc;
 141
 142         devc = sdi->priv;
 143
 144         devc->probe_mask = 0;
 145         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 146                 devc->trigger_mask[i] = 0;
 147                 devc->trigger_value[i] = 0;
 148         }
 149
 150         devc->num_stages = 0;
 151         for (l = sdi->probes; l; l = l->next) {
 152                 probe = (const struct sr_probe *)l->data;
 153                 if (!probe->enabled)
 154                         continue;
 155
 156                 /*
 157                  * Set up the probe mask for later configuration into the
 158                  * flag register.
 159                  */
 160                 probe_bit = 1 << (probe->index);
 161                 devc->probe_mask |= probe_bit;
 162
 163                 if (!probe->trigger)
 164                         continue;
 165
 166                 /* Configure trigger mask and value. */
 167                 stage = 0;
 168                 for (tc = probe->trigger; tc && *tc; tc++) {
 169                         devc->trigger_mask[stage] |= probe_bit;
 170                         if (*tc == '1')
 171                                 devc->trigger_value[stage] |= probe_bit;
 172                         stage++;
 173                         if (stage > 3)
 174                                 /*
 175                                  * TODO: Only supporting parallel mode, with
 176                                  * up to 4 stages.
 177                                  */
 178                                 return SR_ERR;
 179                 }
 180                 if (stage > devc->num_stages)
 181                         devc->num_stages = stage;
 182         }
 183
 184         return SR_OK;
 185 }
 186
 187 static uint32_t reverse16(uint32_t in)
 188 {
 189         uint32_t out;
 190
 191         out = (in & 0xff) << 8;
 192         out |= (in & 0xff00) >> 8;
 193         out |= (in & 0xff0000) << 8;
 194         out |= (in & 0xff000000) >> 8;
 195
 196         return out;
 197 }
 198
 199 static uint32_t reverse32(uint32_t in)
 200 {
 201         uint32_t out;
 202
 203         out = (in & 0xff) << 24;
 204         out |= (in & 0xff00) << 8;
 205         out |= (in & 0xff0000) >> 8;
 206         out |= (in & 0xff000000) >> 24;
 207
 208         return out;
 209 }
 210
 211 static struct dev_context *ols_dev_new(void)
 212 {
 213         struct dev_context *devc;
 214
 215         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 216                 sr_err("ols: %s: devc malloc failed", __func__);
 217                 return NULL;
 218         }
 219
 220         devc->trigger_at = -1;
 221         devc->probe_mask = 0xffffffff;
 222         devc->cur_samplerate = SR_KHZ(200);
 223         devc->serial = NULL;
 224
 225         return devc;
 226 }
 227
 228 static struct sr_dev_inst *get_metadata(struct sr_serial_dev_inst *serial)
 229 {
 230         struct sr_dev_inst *sdi;
 231         struct dev_context *devc;
 232         struct sr_probe *probe;
 233         uint32_t tmp_int, ui;
 234         uint8_t key, type, token;
 235         GString *tmp_str, *devname, *version;
 236         guchar tmp_c;
 237
 238         sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, NULL, NULL, NULL);
 239         sdi->driver = odi;
 240         devc = ols_dev_new();
 241         sdi->priv = devc;
 242
 243         devname = g_string_new("");
 244         version = g_string_new("");
 245
 246         key = 0xff;
 247         while (key) {
 248                 if (serial_read(serial, &key, 1) != 1 || key == 0x00)
 249                         break;
 250                 type = key >> 5;
 251                 token = key & 0x1f;
 252                 switch (type) {
 253                 case 0:
 254                         /* NULL-terminated string */
 255                         tmp_str = g_string_new("");
 256                         while (serial_read(serial, &tmp_c, 1) == 1 && tmp_c != '\0')
 257                                 g_string_append_c(tmp_str, tmp_c);
 258                         sr_dbg("ols: got metadata key 0x%.2x value '%s'",
 259                                key, tmp_str->str);
 260                         switch (token) {
 261                         case 0x01:
 262                                 /* Device name */
 263                                 devname = g_string_append(devname, tmp_str->str);
 264                                 break;
 265                         case 0x02:
 266                                 /* FPGA firmware version */
 267                                 if (version->len)
 268                                         g_string_append(version, ", ");
 269                                 g_string_append(version, "FPGA version ");
 270                                 g_string_append(version, tmp_str->str);
 271                                 break;
 272                         case 0x03:
 273                                 /* Ancillary version */
 274                                 if (version->len)
 275                                         g_string_append(version, ", ");
 276                                 g_string_append(version, "Ancillary version ");
 277                                 g_string_append(version, tmp_str->str);
 278                                 break;
 279                         default:
 280                                 sr_info("ols: unknown token 0x%.2x: '%s'",
 281                                         token, tmp_str->str);
 282                                 break;
 283                         }
 284                         g_string_free(tmp_str, TRUE);
 285                         break;
 286                 case 1:
 287                         /* 32-bit unsigned integer */
 288                         if (serial_read(serial, &tmp_int, 4) != 4)
 289                                 break;
 290                         tmp_int = reverse32(tmp_int);
 291                         sr_dbg("ols: got metadata key 0x%.2x value 0x%.8x",
 292                                key, tmp_int);
 293                         switch (token) {
 294                         case 0x00:
 295                                 /* Number of usable probes */
 296                                 for (ui = 0; ui < tmp_int; ui++) {
 297                                         if (!(probe = sr_probe_new(ui, SR_PROBE_LOGIC, TRUE,
 298                                                         probe_names[ui])))
 299                                                 return 0;
 300                                         sdi->probes = g_slist_append(sdi->probes, probe);
 301                                 }
 302                                 break;
 303                         case 0x01:
 304                                 /* Amount of sample memory available (bytes) */
 305                                 devc->max_samples = tmp_int;
 306                                 break;
 307                         case 0x02:
 308                                 /* Amount of dynamic memory available (bytes) */
 309                                 /* what is this for? */
 310                                 break;
 311                         case 0x03:
 312                                 /* Maximum sample rate (hz) */
 313                                 devc->max_samplerate = tmp_int;
 314                                 break;
 315                         case 0x04:
 316                                 /* protocol version */
 317                                 devc->protocol_version = tmp_int;
 318                                 break;
 319                         default:
 320                                 sr_info("ols: unknown token 0x%.2x: 0x%.8x",
 321                                         token, tmp_int);
 322                                 break;
 323                         }
 324                         break;
 325                 case 2:
 326                         /* 8-bit unsigned integer */
 327                         if (serial_read(serial, &tmp_c, 1) != 1)
 328                                 break;
 329                         sr_dbg("ols: got metadata key 0x%.2x value 0x%.2x",
 330                                key, tmp_c);
 331                         switch (token) {
 332                         case 0x00:
 333                                 /* Number of usable probes */
 334                                 for (ui = 0; ui < tmp_c; ui++) {
 335                                         if (!(probe = sr_probe_new(ui, SR_PROBE_LOGIC, TRUE,
 336                                                         probe_names[ui])))
 337                                                 return 0;
 338                                         sdi->probes = g_slist_append(sdi->probes, probe);
 339                                 }
 340                                 break;
 341                         case 0x01:
 342                                 /* protocol version */
 343                                 devc->protocol_version = tmp_c;
 344                                 break;
 345                         default:
 346                                 sr_info("ols: unknown token 0x%.2x: 0x%.2x",
 347                                         token, tmp_c);
 348                                 break;
 349                         }
 350                         break;
 351                 default:
 352                         /* unknown type */
 353                         break;
 354                 }
 355         }
 356
 357         sdi->model = devname->str;
 358         sdi->version = version->str;
 359         g_string_free(devname, FALSE);
 360         g_string_free(version, FALSE);
 361
 362         return sdi;
 363 }
 364
 365 static int hw_init(struct sr_context *sr_ctx)
 366 {
 367         struct drv_context *drvc;
 368
 369         if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
 370                 sr_err("ols: driver context malloc failed.");
 371                 return SR_ERR_MALLOC;
 372         }
 373         drvc->sr_ctx = sr_ctx;
 374         odi->priv = drvc;
 375
 376         return SR_OK;
 377 }
 378
 379 static GSList *hw_scan(GSList *options)
 380 {
 381         struct sr_hwopt *opt;
 382         struct sr_dev_inst *sdi;
 383         struct drv_context *drvc;
 384         struct dev_context *devc;
 385         struct sr_probe *probe;
 386         struct sr_serial_dev_inst *serial;
 387         GPollFD probefd;
 388         GSList *l, *devices;
 389         int ret, i;
 390         const char *conn, *serialcomm;
 391         char buf[8];
 392
 393         (void)options;
 394         drvc = odi->priv;
 395         devices = NULL;
 396
 397         conn = serialcomm = NULL;
 398         for (l = options; l; l = l->next) {
 399                 opt = l->data;
 400                 switch (opt->hwopt) {
 401                 case SR_HWOPT_CONN:
 402                         conn = opt->value;
 403                         break;
 404                 case SR_HWOPT_SERIALCOMM:
 405                         serialcomm = opt->value;
 406                         break;
 407                 }
 408         }
 409         if (!conn)
 410                 return NULL;
 411
 412         if (serialcomm == NULL)
 413                 serialcomm = SERIALCOMM;
 414
 415         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 416                 return NULL;
 417
 418         /* The discovery procedure is like this: first send the Reset
 419          * command (0x00) 5 times, since the device could be anywhere
 420          * in a 5-byte command. Then send the ID command (0x02).
 421          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 422          * have a match.
 423          */
 424         sr_info("ols: probing %s .", conn);
 425         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 426                 return NULL;
 427
 428         ret = SR_OK;
 429         for (i = 0; i < 5; i++) {
 430                 if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
 431                         sr_err("ols: port %s is not writable.", conn);
 432                         break;
 433                 }
 434         }
 435         if (ret != SR_OK) {
 436                 serial_close(serial);
 437                 sr_err("ols: Could not use port %s. Quitting.", conn);
 438                 return NULL;
 439         }
 440         send_shortcommand(serial, CMD_ID);
 441
 442         /* Wait 10ms for a response. */
 443         usleep(10000);
 444
 445         probefd.fd = serial->fd;
 446         probefd.events = G_IO_IN;
 447         g_poll(&probefd, 1, 1);
 448
 449         if (probefd.revents != G_IO_IN)
 450                 return NULL;
 451         if (serial_read(serial, buf, 4) != 4)
 452                 return NULL;
 453         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 454                 return NULL;
 455
 456         /* Definitely using the OLS protocol, check if it supports
 457          * the metadata command.
 458          */
 459         send_shortcommand(serial, CMD_METADATA);
 460         if (g_poll(&probefd, 1, 10) > 0) {
 461                 /* Got metadata. */
 462                 sdi = get_metadata(serial);
 463                 sdi->index = 0;
 464                 devc = sdi->priv;
 465         } else {
 466                 /* Not an OLS -- some other board that uses the sump protocol. */
 467                 sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
 468                                 "Sump", "Logic Analyzer", "v1.0");
 469                 sdi->driver = odi;
 470                 devc = ols_dev_new();
 471                 for (i = 0; i < 32; i++) {
 472                         if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
 473                                         probe_names[i])))
 474                                 return 0;
 475                         sdi->probes = g_slist_append(sdi->probes, probe);
 476                 }
 477                 sdi->priv = devc;
 478         }
 479         devc->serial = serial;
 480         drvc->instances = g_slist_append(drvc->instances, sdi);
 481         devices = g_slist_append(devices, sdi);
 482
 483         serial_close(serial);
 484
 485         return devices;
 486 }
 487
 488 static GSList *hw_dev_list(void)
 489 {
 490         struct drv_context *drvc;
 491
 492         drvc = odi->priv;
 493
 494         return drvc->instances;
 495 }
 496
 497 static int hw_dev_open(struct sr_dev_inst *sdi)
 498 {
 499         struct dev_context *devc;
 500
 501         devc = sdi->priv;
 502
 503         if (serial_open(devc->serial, SERIAL_RDWR) != SR_OK)
 504                 return SR_ERR;
 505
 506         sdi->status = SR_ST_ACTIVE;
 507
 508         return SR_OK;
 509 }
 510
 511 static int hw_dev_close(struct sr_dev_inst *sdi)
 512 {
 513         struct dev_context *devc;
 514
 515         devc = sdi->priv;
 516
 517         if (devc->serial && devc->serial->fd != -1) {
 518                 serial_close(devc->serial);
 519                 sdi->status = SR_ST_INACTIVE;
 520         }
 521
 522         return SR_OK;
 523 }
 524
 525 static int hw_cleanup(void)
 526 {
 527         GSList *l;
 528         struct sr_dev_inst *sdi;
 529         struct drv_context *drvc;
 530         struct dev_context *devc;
 531         int ret = SR_OK;
 532
 533         if (!(drvc = odi->priv))
 534                 return SR_OK;
 535
 536         /* Properly close and free all devices. */
 537         for (l = drvc->instances; l; l = l->next) {
 538                 if (!(sdi = l->data)) {
 539                         /* Log error, but continue cleaning up the rest. */
 540                         sr_err("ols: %s: sdi was NULL, continuing", __func__);
 541                         ret = SR_ERR_BUG;
 542                         continue;
 543                 }
 544                 if (!(devc = sdi->priv)) {
 545                         /* Log error, but continue cleaning up the rest. */
 546                         sr_err("ols: %s: sdi->priv was NULL, continuing",
 547                                __func__);
 548                         ret = SR_ERR_BUG;
 549                         continue;
 550                 }
 551                 hw_dev_close(sdi);
 552                 sr_serial_dev_inst_free(devc->serial);
 553                 sr_dev_inst_free(sdi);
 554         }
 555         g_slist_free(drvc->instances);
 556         drvc->instances = NULL;
 557
 558         return ret;
 559 }
 560
 561 static int hw_info_get(int info_id, const void **data,
 562        const struct sr_dev_inst *sdi)
 563 {
 564         struct dev_context *devc;
 565
 566         switch (info_id) {
 567         case SR_DI_HWCAPS:
 568                 *data = hwcaps;
 569                 break;
 570         case SR_DI_NUM_PROBES:
 571                 *data = GINT_TO_POINTER(1);
 572                 break;
 573         case SR_DI_PROBE_NAMES:
 574                 *data = probe_names;
 575                 break;
 576         case SR_DI_SAMPLERATES:
 577                 *data = &samplerates;
 578                 break;
 579         case SR_DI_TRIGGER_TYPES:
 580                 *data = (char *)TRIGGER_TYPES;
 581                 break;
 582         case SR_DI_CUR_SAMPLERATE:
 583                 if (sdi) {
 584                         devc = sdi->priv;
 585                         *data = &devc->cur_samplerate;
 586                 } else
 587                         return SR_ERR;
 588                 break;
 589         default:
 590                 return SR_ERR_ARG;
 591         }
 592
 593         return SR_OK;
 594 }
 595
 596 static int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
 597 {
 598         struct dev_context *devc;
 599
 600         devc = sdi->priv;
 601         if (devc->max_samplerate) {
 602                 if (samplerate > devc->max_samplerate)
 603                         return SR_ERR_SAMPLERATE;
 604         } else if (samplerate < samplerates.low || samplerate > samplerates.high)
 605                 return SR_ERR_SAMPLERATE;
 606
 607         if (samplerate > CLOCK_RATE) {
 608                 devc->flag_reg |= FLAG_DEMUX;
 609                 devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1;
 610         } else {
 611                 devc->flag_reg &= ~FLAG_DEMUX;
 612                 devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1;
 613         }
 614
 615         /* Calculate actual samplerate used and complain if it is different
 616          * from the requested.
 617          */
 618         devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1);
 619         if (devc->flag_reg & FLAG_DEMUX)
 620                 devc->cur_samplerate *= 2;
 621         if (devc->cur_samplerate != samplerate)
 622                 sr_err("ols: can't match samplerate %" PRIu64 ", using %"
 623                        PRIu64, samplerate, devc->cur_samplerate);
 624
 625         return SR_OK;
 626 }
 627
 628 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 629                 const void *value)
 630 {
 631         struct dev_context *devc;
 632         int ret;
 633         const uint64_t *tmp_u64;
 634
 635         devc = sdi->priv;
 636
 637         if (sdi->status != SR_ST_ACTIVE)
 638                 return SR_ERR;
 639
 640         switch (hwcap) {
 641         case SR_HWCAP_SAMPLERATE:
 642                 ret = set_samplerate(sdi, *(const uint64_t *)value);
 643                 break;
 644         case SR_HWCAP_LIMIT_SAMPLES:
 645                 tmp_u64 = value;
 646                 if (*tmp_u64 < MIN_NUM_SAMPLES)
 647                         return SR_ERR;
 648                 if (*tmp_u64 > devc->max_samples)
 649                         sr_err("ols: sample limit exceeds hw max");
 650                 devc->limit_samples = *tmp_u64;
 651                 sr_info("ols: sample limit %" PRIu64, devc->limit_samples);
 652                 ret = SR_OK;
 653                 break;
 654         case SR_HWCAP_CAPTURE_RATIO:
 655                 devc->capture_ratio = *(const uint64_t *)value;
 656                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 657                         devc->capture_ratio = 0;
 658                         ret = SR_ERR;
 659                 } else
 660                         ret = SR_OK;
 661                 break;
 662         case SR_HWCAP_RLE:
 663                 if (GPOINTER_TO_INT(value)) {
 664                         sr_info("ols: enabling RLE");
 665                         devc->flag_reg |= FLAG_RLE;
 666                 }
 667                 ret = SR_OK;
 668                 break;
 669         default:
 670                 ret = SR_ERR;
 671         }
 672
 673         return ret;
 674 }
 675
 676 static void abort_acquisition(const struct sr_dev_inst *sdi)
 677 {
 678         struct sr_datafeed_packet packet;
 679         struct dev_context *devc;
 680
 681         devc = sdi->priv;
 682         sr_source_remove(devc->serial->fd);
 683
 684         /* Terminate session */
 685         packet.type = SR_DF_END;
 686         sr_session_send(sdi, &packet);
 687
 688 }
 689
 690
 691
 692 static int receive_data(int fd, int revents, void *cb_data)
 693 {
 694         struct sr_datafeed_packet packet;
 695         struct sr_datafeed_logic logic;
 696         struct sr_dev_inst *sdi;
 697         struct drv_context *drvc;
 698         struct dev_context *devc;
 699         GSList *l;
 700         int num_channels, offset, i, j;
 701         unsigned char byte;
 702
 703         drvc = odi->priv;
 704
 705         /* Find this device's devc struct by its fd. */
 706         devc = NULL;
 707         for (l = drvc->instances; l; l = l->next) {
 708                 sdi = l->data;
 709                 devc = sdi->priv;
 710                 if (devc->serial->fd == fd)
 711                         break;
 712                 devc = NULL;
 713         }
 714         if (!devc)
 715                 /* Shouldn't happen. */
 716                 return TRUE;
 717
 718         if (devc->num_transfers++ == 0) {
 719                 /*
 720                  * First time round, means the device started sending data,
 721                  * and will not stop until done. If it stops sending for
 722                  * longer than it takes to send a byte, that means it's
 723                  * finished. We'll double that to 30ms to be sure...
 724                  */
 725                 sr_source_remove(fd);
 726                 sr_source_add(fd, G_IO_IN, 30, receive_data, cb_data);
 727                 /* TODO: Check malloc return code. */
 728                 devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4);
 729                 if (!devc->raw_sample_buf) {
 730                         sr_err("ols: %s: devc->raw_sample_buf malloc failed",
 731                                __func__);
 732                         return FALSE;
 733                 }
 734                 /* fill with 1010... for debugging */
 735                 memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4);
 736         }
 737
 738         num_channels = 0;
 739         for (i = 0x20; i > 0x02; i /= 2) {
 740                 if ((devc->flag_reg & i) == 0)
 741                         num_channels++;
 742         }
 743
 744         if (revents == G_IO_IN) {
 745                 if (serial_read(devc->serial, &byte, 1) != 1)
 746                         return FALSE;
 747
 748                 /* Ignore it if we've read enough. */
 749                 if (devc->num_samples >= devc->limit_samples)
 750                         return TRUE;
 751
 752                 devc->sample[devc->num_bytes++] = byte;
 753                 sr_dbg("ols: received byte 0x%.2x", byte);
 754                 if (devc->num_bytes == num_channels) {
 755                         /* Got a full sample. */
 756                         sr_dbg("ols: received sample 0x%.*x",
 757                                devc->num_bytes * 2, *(int *)devc->sample);
 758                         if (devc->flag_reg & FLAG_RLE) {
 759                                 /*
 760                                  * In RLE mode -1 should never come in as a
 761                                  * sample, because bit 31 is the "count" flag.
 762                                  */
 763                                 if (devc->sample[devc->num_bytes - 1] & 0x80) {
 764                                         devc->sample[devc->num_bytes - 1] &= 0x7f;
 765                                         /*
 766                                          * FIXME: This will only work on
 767                                          * little-endian systems.
 768                                          */
 769                                         devc->rle_count = *(int *)(devc->sample);
 770                                         sr_dbg("ols: RLE count = %d", devc->rle_count);
 771                                         devc->num_bytes = 0;
 772                                         return TRUE;
 773                                 }
 774                         }
 775                         devc->num_samples += devc->rle_count + 1;
 776                         if (devc->num_samples > devc->limit_samples) {
 777                                 /* Save us from overrunning the buffer. */
 778                                 devc->rle_count -= devc->num_samples - devc->limit_samples;
 779                                 devc->num_samples = devc->limit_samples;
 780                         }
 781
 782                         if (num_channels < 4) {
 783                                 /*
 784                                  * Some channel groups may have been turned
 785                                  * off, to speed up transfer between the
 786                                  * hardware and the PC. Expand that here before
 787                                  * submitting it over the session bus --
 788                                  * whatever is listening on the bus will be
 789                                  * expecting a full 32-bit sample, based on
 790                                  * the number of probes.
 791                                  */
 792                                 j = 0;
 793                                 memset(devc->tmp_sample, 0, 4);
 794                                 for (i = 0; i < 4; i++) {
 795                                         if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
 796                                                 /*
 797                                                  * This channel group was
 798                                                  * enabled, copy from received
 799                                                  * sample.
 800                                                  */
 801                                                 devc->tmp_sample[i] = devc->sample[j++];
 802                                         }
 803                                 }
 804                                 memcpy(devc->sample, devc->tmp_sample, 4);
 805                                 sr_dbg("ols: full sample 0x%.8x", *(int *)devc->sample);
 806                         }
 807
 808                         /* the OLS sends its sample buffer backwards.
 809                          * store it in reverse order here, so we can dump
 810                          * this on the session bus later.
 811                          */
 812                         offset = (devc->limit_samples - devc->num_samples) * 4;
 813                         for (i = 0; i <= devc->rle_count; i++) {
 814                                 memcpy(devc->raw_sample_buf + offset + (i * 4),
 815                                        devc->sample, 4);
 816                         }
 817                         memset(devc->sample, 0, 4);
 818                         devc->num_bytes = 0;
 819                         devc->rle_count = 0;
 820                 }
 821         } else {
 822                 /*
 823                  * This is the main loop telling us a timeout was reached, or
 824                  * we've acquired all the samples we asked for -- we're done.
 825                  * Send the (properly-ordered) buffer to the frontend.
 826                  */
 827                 if (devc->trigger_at != -1) {
 828                         /* a trigger was set up, so we need to tell the frontend
 829                          * about it.
 830                          */
 831                         if (devc->trigger_at > 0) {
 832                                 /* there are pre-trigger samples, send those first */
 833                                 packet.type = SR_DF_LOGIC;
 834                                 packet.payload = &logic;
 835                                 logic.length = devc->trigger_at * 4;
 836                                 logic.unitsize = 4;
 837                                 logic.data = devc->raw_sample_buf +
 838                                         (devc->limit_samples - devc->num_samples) * 4;
 839                                 sr_session_send(cb_data, &packet);
 840                         }
 841
 842                         /* send the trigger */
 843                         packet.type = SR_DF_TRIGGER;
 844                         sr_session_send(cb_data, &packet);
 845
 846                         /* send post-trigger samples */
 847                         packet.type = SR_DF_LOGIC;
 848                         packet.payload = &logic;
 849                         logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4);
 850                         logic.unitsize = 4;
 851                         logic.data = devc->raw_sample_buf + devc->trigger_at * 4 +
 852                                 (devc->limit_samples - devc->num_samples) * 4;
 853                         sr_session_send(cb_data, &packet);
 854                 } else {
 855                         /* no trigger was used */
 856                         packet.type = SR_DF_LOGIC;
 857                         packet.payload = &logic;
 858                         logic.length = devc->num_samples * 4;
 859                         logic.unitsize = 4;
 860                         logic.data = devc->raw_sample_buf +
 861                                 (devc->limit_samples - devc->num_samples) * 4;
 862                         sr_session_send(cb_data, &packet);
 863                 }
 864                 g_free(devc->raw_sample_buf);
 865
 866                 serial_flush(devc->serial);
 867                 abort_acquisition(sdi);
 868                 serial_close(devc->serial);
 869         }
 870
 871         return TRUE;
 872 }
 873
 874 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 875                 void *cb_data)
 876 {
 877         struct sr_datafeed_packet *packet;
 878         struct sr_datafeed_header *header;
 879         struct sr_datafeed_meta_logic meta;
 880         struct dev_context *devc;
 881         uint32_t trigger_config[4];
 882         uint32_t data;
 883         uint16_t readcount, delaycount;
 884         uint8_t changrp_mask;
 885         int num_channels;
 886         int i;
 887
 888         devc = sdi->priv;
 889
 890         if (sdi->status != SR_ST_ACTIVE)
 891                 return SR_ERR;
 892
 893         if (configure_probes(sdi) != SR_OK) {
 894                 sr_err("ols: failed to configured probes");
 895                 return SR_ERR;
 896         }
 897
 898         /*
 899          * Enable/disable channel groups in the flag register according to the
 900          * probe mask. Calculate this here, because num_channels is needed
 901          * to limit readcount.
 902          */
 903         changrp_mask = 0;
 904         num_channels = 0;
 905         for (i = 0; i < 4; i++) {
 906                 if (devc->probe_mask & (0xff << (i * 8))) {
 907                         changrp_mask |= (1 << i);
 908                         num_channels++;
 909                 }
 910         }
 911
 912         /*
 913          * Limit readcount to prevent reading past the end of the hardware
 914          * buffer.
 915          */
 916         readcount = MIN(devc->max_samples / num_channels, devc->limit_samples) / 4;
 917
 918         memset(trigger_config, 0, 16);
 919         trigger_config[devc->num_stages - 1] |= 0x08;
 920         if (devc->trigger_mask[0]) {
 921                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 922                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 923
 924                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_0,
 925                         reverse32(devc->trigger_mask[0])) != SR_OK)
 926                         return SR_ERR;
 927                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_0,
 928                         reverse32(devc->trigger_value[0])) != SR_OK)
 929                         return SR_ERR;
 930                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_0,
 931                         trigger_config[0]) != SR_OK)
 932                         return SR_ERR;
 933
 934                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_1,
 935                         reverse32(devc->trigger_mask[1])) != SR_OK)
 936                         return SR_ERR;
 937                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_1,
 938                         reverse32(devc->trigger_value[1])) != SR_OK)
 939                         return SR_ERR;
 940                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_1,
 941                         trigger_config[1]) != SR_OK)
 942                         return SR_ERR;
 943
 944                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_2,
 945                         reverse32(devc->trigger_mask[2])) != SR_OK)
 946                         return SR_ERR;
 947                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_2,
 948                         reverse32(devc->trigger_value[2])) != SR_OK)
 949                         return SR_ERR;
 950                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_2,
 951                         trigger_config[2]) != SR_OK)
 952                         return SR_ERR;
 953
 954                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_3,
 955                         reverse32(devc->trigger_mask[3])) != SR_OK)
 956                         return SR_ERR;
 957                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_3,
 958                         reverse32(devc->trigger_value[3])) != SR_OK)
 959                         return SR_ERR;
 960                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_3,
 961                         trigger_config[3]) != SR_OK)
 962                         return SR_ERR;
 963         } else {
 964                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_MASK_0,
 965                                 devc->trigger_mask[0]) != SR_OK)
 966                         return SR_ERR;
 967                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_VALUE_0,
 968                                 devc->trigger_value[0]) != SR_OK)
 969                         return SR_ERR;
 970                 if (send_longcommand(devc->serial, CMD_SET_TRIGGER_CONFIG_0,
 971                      0x00000008) != SR_OK)
 972                         return SR_ERR;
 973                 delaycount = readcount;
 974         }
 975
 976         sr_info("ols: setting samplerate to %" PRIu64 " Hz (divider %u, "
 977                 "demux %s)", devc->cur_samplerate, devc->cur_samplerate_divider,
 978                 devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 979         if (send_longcommand(devc->serial, CMD_SET_DIVIDER,
 980                         reverse32(devc->cur_samplerate_divider)) != SR_OK)
 981                 return SR_ERR;
 982
 983         /* Send sample limit and pre/post-trigger capture ratio. */
 984         data = ((readcount - 1) & 0xffff) << 16;
 985         data |= (delaycount - 1) & 0xffff;
 986         if (send_longcommand(devc->serial, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
 987                 return SR_ERR;
 988
 989         /* The flag register wants them here, and 1 means "disable channel". */
 990         devc->flag_reg |= ~(changrp_mask << 2) & 0x3c;
 991         devc->flag_reg |= FLAG_FILTER;
 992         devc->rle_count = 0;
 993         data = (devc->flag_reg << 24) | ((devc->flag_reg << 8) & 0xff0000);
 994         if (send_longcommand(devc->serial, CMD_SET_FLAGS, data) != SR_OK)
 995                 return SR_ERR;
 996
 997         /* Start acquisition on the device. */
 998         if (send_shortcommand(devc->serial, CMD_RUN) != SR_OK)
 999                 return SR_ERR;
1000
1001         sr_source_add(devc->serial->fd, G_IO_IN, -1, receive_data,
1002                       cb_data);
1003
1004         if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
1005                 sr_err("ols: %s: packet malloc failed", __func__);
1006                 return SR_ERR_MALLOC;
1007         }
1008
1009         if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
1010                 sr_err("ols: %s: header malloc failed", __func__);
1011                 g_free(packet);
1012                 return SR_ERR_MALLOC;
1013         }
1014
1015         /* Send header packet to the session bus. */
1016         packet->type = SR_DF_HEADER;
1017         packet->payload = (unsigned char *)header;
1018         header->feed_version = 1;
1019         gettimeofday(&header->starttime, NULL);
1020         sr_session_send(cb_data, packet);
1021
1022         /* Send metadata about the SR_DF_LOGIC packets to come. */
1023         packet->type = SR_DF_META_LOGIC;
1024         packet->payload = &meta;
1025         meta.samplerate = devc->cur_samplerate;
1026         meta.num_probes = NUM_PROBES;
1027         sr_session_send(cb_data, packet);
1028
1029         g_free(header);
1030         g_free(packet);
1031
1032         return SR_OK;
1033 }
1034
1035 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
1036 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
1037 {
1038         /* Avoid compiler warnings. */
1039         (void)cb_data;
1040
1041         abort_acquisition(sdi);
1042
1043         return SR_OK;
1044 }
1045
1046 SR_PRIV struct sr_dev_driver ols_driver_info = {
1047         .name = "ols",
1048         .longname = "Openbench Logic Sniffer",
1049         .api_version = 1,
1050         .init = hw_init,
1051         .cleanup = hw_cleanup,
1052         .scan = hw_scan,
1053         .dev_list = hw_dev_list,
1054         .dev_clear = hw_cleanup,
1055         .dev_open = hw_dev_open,
1056         .dev_close = hw_dev_close,
1057         .info_get = hw_info_get,
1058         .dev_config_set = hw_dev_config_set,
1059         .dev_acquisition_start = hw_dev_acquisition_start,
1060         .dev_acquisition_stop = hw_dev_acquisition_stop,
1061         .priv = NULL,
1062 };