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 #ifdef _WIN32
  46 #define O_NONBLOCK FIONBIO
  47 #endif
  48
  49 static const int hwcaps[] = {
  50         SR_HWCAP_LOGIC_ANALYZER,
  51         SR_HWCAP_SAMPLERATE,
  52         SR_HWCAP_CAPTURE_RATIO,
  53         SR_HWCAP_LIMIT_SAMPLES,
  54         SR_HWCAP_RLE,
  55         0,
  56 };
  57
  58 /* Probes are numbered 0-31 (on the PCB silkscreen). */
  59 static const char *probe_names[NUM_PROBES + 1] = {
  60         "0",
  61         "1",
  62         "2",
  63         "3",
  64         "4",
  65         "5",
  66         "6",
  67         "7",
  68         "8",
  69         "9",
  70         "10",
  71         "11",
  72         "12",
  73         "13",
  74         "14",
  75         "15",
  76         "16",
  77         "17",
  78         "18",
  79         "19",
  80         "20",
  81         "21",
  82         "22",
  83         "23",
  84         "24",
  85         "25",
  86         "26",
  87         "27",
  88         "28",
  89         "29",
  90         "30",
  91         "31",
  92         NULL,
  93 };
  94
  95 /* default supported samplerates, can be overridden by device metadata */
  96 static const struct sr_samplerates samplerates = {
  97         SR_HZ(10),
  98         SR_MHZ(200),
  99         SR_HZ(1),
 100         NULL,
 101 };
 102
 103 SR_PRIV struct sr_dev_driver ols_driver_info;
 104 static struct sr_dev_driver *odi = &ols_driver_info;
 105
 106 static int send_shortcommand(int fd, uint8_t command)
 107 {
 108         char buf[1];
 109
 110         sr_dbg("ols: sending cmd 0x%.2x", command);
 111         buf[0] = command;
 112         if (serial_write(fd, buf, 1) != 1)
 113                 return SR_ERR;
 114
 115         return SR_OK;
 116 }
 117
 118 static int send_longcommand(int fd, 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(fd, buf, 5) != 5)
 129                 return SR_ERR;
 130
 131         return SR_OK;
 132 }
 133
 134 static int configure_probes(struct dev_context *devc, const GSList *probes)
 135 {
 136         const struct sr_probe *probe;
 137         const GSList *l;
 138         int probe_bit, stage, i;
 139         char *tc;
 140
 141         devc->probe_mask = 0;
 142         for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 143                 devc->trigger_mask[i] = 0;
 144                 devc->trigger_value[i] = 0;
 145         }
 146
 147         devc->num_stages = 0;
 148         for (l = probes; l; l = l->next) {
 149                 probe = (const struct sr_probe *)l->data;
 150                 if (!probe->enabled)
 151                         continue;
 152
 153                 /*
 154                  * Set up the probe mask for later configuration into the
 155                  * flag register.
 156                  */
 157                 probe_bit = 1 << (probe->index);
 158                 devc->probe_mask |= probe_bit;
 159
 160                 if (!probe->trigger)
 161                         continue;
 162
 163                 /* Configure trigger mask and value. */
 164                 stage = 0;
 165                 for (tc = probe->trigger; tc && *tc; tc++) {
 166                         devc->trigger_mask[stage] |= probe_bit;
 167                         if (*tc == '1')
 168                                 devc->trigger_value[stage] |= probe_bit;
 169                         stage++;
 170                         if (stage > 3)
 171                                 /*
 172                                  * TODO: Only supporting parallel mode, with
 173                                  * up to 4 stages.
 174                                  */
 175                                 return SR_ERR;
 176                 }
 177                 if (stage > devc->num_stages)
 178                         devc->num_stages = stage;
 179         }
 180
 181         return SR_OK;
 182 }
 183
 184 static uint32_t reverse16(uint32_t in)
 185 {
 186         uint32_t out;
 187
 188         out = (in & 0xff) << 8;
 189         out |= (in & 0xff00) >> 8;
 190         out |= (in & 0xff0000) << 8;
 191         out |= (in & 0xff000000) >> 8;
 192
 193         return out;
 194 }
 195
 196 static uint32_t reverse32(uint32_t in)
 197 {
 198         uint32_t out;
 199
 200         out = (in & 0xff) << 24;
 201         out |= (in & 0xff00) << 8;
 202         out |= (in & 0xff0000) >> 8;
 203         out |= (in & 0xff000000) >> 24;
 204
 205         return out;
 206 }
 207
 208 static struct dev_context *ols_dev_new(void)
 209 {
 210         struct dev_context *devc;
 211
 212         /* TODO: Is 'devc' ever g_free()'d? */
 213         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 214                 sr_err("ols: %s: devc malloc failed", __func__);
 215                 return NULL;
 216         }
 217
 218         devc->trigger_at = -1;
 219         devc->probe_mask = 0xffffffff;
 220         devc->cur_samplerate = SR_KHZ(200);
 221         devc->serial = NULL;
 222
 223         return devc;
 224 }
 225
 226 static struct sr_dev_inst *get_metadata(int fd)
 227 {
 228         struct sr_dev_inst *sdi;
 229         struct dev_context *devc;
 230         struct sr_probe *probe;
 231         uint32_t tmp_int, ui;
 232         uint8_t key, type, token;
 233         GString *tmp_str, *devname, *version;
 234         guchar tmp_c;
 235
 236         sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, NULL, NULL, NULL);
 237         sdi->driver = odi;
 238         devc = ols_dev_new();
 239         sdi->priv = devc;
 240
 241         devname = g_string_new("");
 242         version = g_string_new("");
 243
 244         key = 0xff;
 245         while (key) {
 246                 if (serial_read(fd, &key, 1) != 1 || key == 0x00)
 247                         break;
 248                 type = key >> 5;
 249                 token = key & 0x1f;
 250                 switch (type) {
 251                 case 0:
 252                         /* NULL-terminated string */
 253                         tmp_str = g_string_new("");
 254                         while (serial_read(fd, &tmp_c, 1) == 1 && tmp_c != '\0')
 255                                 g_string_append_c(tmp_str, tmp_c);
 256                         sr_dbg("ols: got metadata key 0x%.2x value '%s'",
 257                                key, tmp_str->str);
 258                         switch (token) {
 259                         case 0x01:
 260                                 /* Device name */
 261                                 devname = g_string_append(devname, tmp_str->str);
 262                                 break;
 263                         case 0x02:
 264                                 /* FPGA firmware version */
 265                                 if (version->len)
 266                                         g_string_append(version, ", ");
 267                                 g_string_append(version, "FPGA version ");
 268                                 g_string_append(version, tmp_str->str);
 269                                 break;
 270                         case 0x03:
 271                                 /* Ancillary version */
 272                                 if (version->len)
 273                                         g_string_append(version, ", ");
 274                                 g_string_append(version, "Ancillary version ");
 275                                 g_string_append(version, tmp_str->str);
 276                                 break;
 277                         default:
 278                                 sr_info("ols: unknown token 0x%.2x: '%s'",
 279                                         token, tmp_str->str);
 280                                 break;
 281                         }
 282                         g_string_free(tmp_str, TRUE);
 283                         break;
 284                 case 1:
 285                         /* 32-bit unsigned integer */
 286                         if (serial_read(fd, &tmp_int, 4) != 4)
 287                                 break;
 288                         tmp_int = reverse32(tmp_int);
 289                         sr_dbg("ols: got metadata key 0x%.2x value 0x%.8x",
 290                                key, tmp_int);
 291                         switch (token) {
 292                         case 0x00:
 293                                 /* Number of usable probes */
 294                                 for (ui = 0; ui < tmp_int; ui++) {
 295                                         if (!(probe = sr_probe_new(ui, SR_PROBE_LOGIC, TRUE,
 296                                                         probe_names[ui])))
 297                                                 return 0;
 298                                         sdi->probes = g_slist_append(sdi->probes, probe);
 299                                 }
 300                                 break;
 301                         case 0x01:
 302                                 /* Amount of sample memory available (bytes) */
 303                                 devc->max_samples = tmp_int;
 304                                 break;
 305                         case 0x02:
 306                                 /* Amount of dynamic memory available (bytes) */
 307                                 /* what is this for? */
 308                                 break;
 309                         case 0x03:
 310                                 /* Maximum sample rate (hz) */
 311                                 devc->max_samplerate = tmp_int;
 312                                 break;
 313                         case 0x04:
 314                                 /* protocol version */
 315                                 devc->protocol_version = tmp_int;
 316                                 break;
 317                         default:
 318                                 sr_info("ols: unknown token 0x%.2x: 0x%.8x",
 319                                         token, tmp_int);
 320                                 break;
 321                         }
 322                         break;
 323                 case 2:
 324                         /* 8-bit unsigned integer */
 325                         if (serial_read(fd, &tmp_c, 1) != 1)
 326                                 break;
 327                         sr_dbg("ols: got metadata key 0x%.2x value 0x%.2x",
 328                                key, tmp_c);
 329                         switch (token) {
 330                         case 0x00:
 331                                 /* Number of usable probes */
 332                                 for (ui = 0; ui < tmp_c; ui++) {
 333                                         if (!(probe = sr_probe_new(ui, SR_PROBE_LOGIC, TRUE,
 334                                                         probe_names[ui])))
 335                                                 return 0;
 336                                         sdi->probes = g_slist_append(sdi->probes, probe);
 337                                 }
 338                                 break;
 339                         case 0x01:
 340                                 /* protocol version */
 341                                 devc->protocol_version = tmp_c;
 342                                 break;
 343                         default:
 344                                 sr_info("ols: unknown token 0x%.2x: 0x%.2x",
 345                                         token, tmp_c);
 346                                 break;
 347                         }
 348                         break;
 349                 default:
 350                         /* unknown type */
 351                         break;
 352                 }
 353         }
 354
 355         sdi->model = devname->str;
 356         sdi->version = version->str;
 357         g_string_free(devname, FALSE);
 358         g_string_free(version, FALSE);
 359
 360         return sdi;
 361 }
 362
 363 static int hw_init(void)
 364 {
 365         struct drv_context *drvc;
 366
 367         if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
 368                 sr_err("ols: driver context malloc failed.");
 369                 return SR_ERR;
 370         }
 371         odi->priv = drvc;
 372
 373         return SR_OK;
 374 }
 375
 376 static GSList *hw_scan(GSList *options)
 377 {
 378         struct sr_dev_inst *sdi;
 379         struct drv_context *drvc;
 380         struct dev_context *devc;
 381         struct sr_probe *probe;
 382         GSList *devices, *ports, *l;
 383         GPollFD *fds, probefd;
 384         int devcnt, final_devcnt, num_ports, fd, ret, i, j;
 385         char buf[8], **dev_names, **serial_params;
 386
 387         (void)options;
 388         drvc = odi->priv;
 389         final_devcnt = 0;
 390         devices = NULL;
 391
 392         /* Scan all serial ports. */
 393         ports = list_serial_ports();
 394         num_ports = g_slist_length(ports);
 395
 396         if (!(fds = g_try_malloc0(num_ports * sizeof(GPollFD)))) {
 397                 sr_err("ols: %s: fds malloc failed", __func__);
 398                 goto hw_init_free_ports; /* TODO: SR_ERR_MALLOC. */
 399         }
 400
 401         if (!(dev_names = g_try_malloc(num_ports * sizeof(char *)))) {
 402                 sr_err("ols: %s: dev_names malloc failed", __func__);
 403                 goto hw_init_free_fds; /* TODO: SR_ERR_MALLOC. */
 404         }
 405
 406         if (!(serial_params = g_try_malloc(num_ports * sizeof(char *)))) {
 407                 sr_err("ols: %s: serial_params malloc failed", __func__);
 408                 goto hw_init_free_dev_names; /* TODO: SR_ERR_MALLOC. */
 409         }
 410
 411         devcnt = 0;
 412         for (l = ports; l; l = l->next) {
 413                 /* The discovery procedure is like this: first send the Reset
 414                  * command (0x00) 5 times, since the device could be anywhere
 415                  * in a 5-byte command. Then send the ID command (0x02).
 416                  * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 417                  * have a match.
 418                  *
 419                  * Since it may take the device a while to respond at 115Kb/s,
 420                  * we do all the sending first, then wait for all of them to
 421                  * respond with g_poll().
 422                  */
 423                 sr_info("ols: probing %s...", (char *)l->data);
 424                 fd = serial_open(l->data, O_RDWR | O_NONBLOCK);
 425                 if (fd != -1) {
 426                         serial_params[devcnt] = serial_backup_params(fd);
 427                         serial_set_params(fd, 115200, 8, SERIAL_PARITY_NONE, 1, 2);
 428                         ret = SR_OK;
 429                         for (i = 0; i < 5; i++) {
 430                                 if ((ret = send_shortcommand(fd,
 431                                         CMD_RESET)) != SR_OK) {
 432                                         /* Serial port is not writable. */
 433                                         break;
 434                                 }
 435                         }
 436                         if (ret != SR_OK) {
 437                                 serial_restore_params(fd,
 438                                         serial_params[devcnt]);
 439                                 serial_close(fd);
 440                                 continue;
 441                         }
 442                         send_shortcommand(fd, CMD_ID);
 443                         fds[devcnt].fd = fd;
 444                         fds[devcnt].events = G_IO_IN;
 445                         dev_names[devcnt] = g_strdup(l->data);
 446                         devcnt++;
 447                 }
 448                 g_free(l->data);
 449         }
 450
 451         /* 2ms isn't enough for reliable transfer with pl2303, let's try 10 */
 452         usleep(10000);
 453
 454         g_poll(fds, devcnt, 1);
 455
 456         for (i = 0; i < devcnt; i++) {
 457                 if (fds[i].revents != G_IO_IN)
 458                         continue;
 459                 if (serial_read(fds[i].fd, buf, 4) != 4)
 460                         continue;
 461                 if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 462                         continue;
 463
 464                 /* definitely using the OLS protocol, check if it supports
 465                  * the metadata command
 466                  */
 467                 send_shortcommand(fds[i].fd, CMD_METADATA);
 468                 probefd.fd = fds[i].fd;
 469                 probefd.events = G_IO_IN;
 470                 if (g_poll(&probefd, 1, 10) > 0) {
 471                         /* got metadata */
 472                         sdi = get_metadata(fds[i].fd);
 473                         sdi->index = final_devcnt;
 474                         devc = sdi->priv;
 475                 } else {
 476                         /* not an OLS -- some other board that uses the sump protocol */
 477                         sdi = sr_dev_inst_new(final_devcnt, SR_ST_INACTIVE,
 478                                         "Sump", "Logic Analyzer", "v1.0");
 479                         sdi->driver = odi;
 480                         devc = ols_dev_new();
 481                         for (j = 0; j < 32; j++) {
 482                                 if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
 483                                                 probe_names[j])))
 484                                         return 0;
 485                                 sdi->probes = g_slist_append(sdi->probes, probe);
 486                         }
 487                         sdi->priv = devc;
 488                 }
 489                 devc->serial = sr_serial_dev_inst_new(dev_names[i], -1);
 490                 drvc->instances = g_slist_append(drvc->instances, sdi);
 491                 devices = g_slist_append(devices, sdi);
 492
 493                 final_devcnt++;
 494                 serial_close(fds[i].fd);
 495                 fds[i].fd = 0;
 496         }
 497
 498         /* clean up after all the probing */
 499         for (i = 0; i < devcnt; i++) {
 500                 if (fds[i].fd != 0) {
 501                         serial_restore_params(fds[i].fd, serial_params[i]);
 502                         serial_close(fds[i].fd);
 503                 }
 504                 g_free(serial_params[i]);
 505                 g_free(dev_names[i]);
 506         }
 507
 508         g_free(serial_params);
 509 hw_init_free_dev_names:
 510         g_free(dev_names);
 511 hw_init_free_fds:
 512         g_free(fds);
 513 hw_init_free_ports:
 514         g_slist_free(ports);
 515
 516         return devices;
 517 }
 518
 519 static int hw_dev_open(struct sr_dev_inst *sdi)
 520 {
 521         struct dev_context *devc;
 522
 523         devc = sdi->priv;
 524
 525         devc->serial->fd = serial_open(devc->serial->port, O_RDWR);
 526         if (devc->serial->fd == -1)
 527                 return SR_ERR;
 528
 529         sdi->status = SR_ST_ACTIVE;
 530
 531         return SR_OK;
 532 }
 533
 534 static int hw_dev_close(struct sr_dev_inst *sdi)
 535 {
 536         struct dev_context *devc;
 537
 538         devc = sdi->priv;
 539
 540         if (devc->serial->fd != -1) {
 541                 serial_close(devc->serial->fd);
 542                 devc->serial->fd = -1;
 543                 sdi->status = SR_ST_INACTIVE;
 544         }
 545
 546         return SR_OK;
 547 }
 548
 549 static int hw_cleanup(void)
 550 {
 551         GSList *l;
 552         struct sr_dev_inst *sdi;
 553         struct drv_context *drvc;
 554         struct dev_context *devc;
 555         int ret = SR_OK;
 556
 557         if (!(drvc = odi->priv))
 558                 return SR_OK;
 559
 560         /* Properly close and free all devices. */
 561         for (l = drvc->instances; l; l = l->next) {
 562                 if (!(sdi = l->data)) {
 563                         /* Log error, but continue cleaning up the rest. */
 564                         sr_err("ols: %s: sdi was NULL, continuing", __func__);
 565                         ret = SR_ERR_BUG;
 566                         continue;
 567                 }
 568                 if (!(devc = sdi->priv)) {
 569                         /* Log error, but continue cleaning up the rest. */
 570                         sr_err("ols: %s: sdi->priv was NULL, continuing",
 571                                __func__);
 572                         ret = SR_ERR_BUG;
 573                         continue;
 574                 }
 575                 /* TODO: Check for serial != NULL. */
 576                 if (devc->serial->fd != -1)
 577                         serial_close(devc->serial->fd);
 578                 sr_serial_dev_inst_free(devc->serial);
 579                 sr_dev_inst_free(sdi);
 580         }
 581         g_slist_free(drvc->instances);
 582         drvc->instances = NULL;
 583
 584         return ret;
 585 }
 586
 587 static int hw_info_get(int info_id, const void **data,
 588        const struct sr_dev_inst *sdi)
 589 {
 590         struct dev_context *devc;
 591
 592         switch (info_id) {
 593         case SR_DI_HWCAPS:
 594                 *data = hwcaps;
 595                 break;
 596         case SR_DI_NUM_PROBES:
 597                 *data = GINT_TO_POINTER(1);
 598                 break;
 599         case SR_DI_PROBE_NAMES:
 600                 *data = probe_names;
 601                 break;
 602         case SR_DI_SAMPLERATES:
 603                 *data = &samplerates;
 604                 break;
 605         case SR_DI_TRIGGER_TYPES:
 606                 *data = (char *)TRIGGER_TYPES;
 607                 break;
 608         case SR_DI_CUR_SAMPLERATE:
 609                 if (sdi) {
 610                         devc = sdi->priv;
 611                         *data = &devc->cur_samplerate;
 612                 } else
 613                         return SR_ERR;
 614                 break;
 615         default:
 616                 return SR_ERR_ARG;
 617         }
 618
 619         return SR_OK;
 620 }
 621
 622 static int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
 623 {
 624         struct dev_context *devc;
 625
 626         devc = sdi->priv;
 627         if (devc->max_samplerate) {
 628                 if (samplerate > devc->max_samplerate)
 629                         return SR_ERR_SAMPLERATE;
 630         } else if (samplerate < samplerates.low || samplerate > samplerates.high)
 631                 return SR_ERR_SAMPLERATE;
 632
 633         if (samplerate > CLOCK_RATE) {
 634                 devc->flag_reg |= FLAG_DEMUX;
 635                 devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1;
 636         } else {
 637                 devc->flag_reg &= ~FLAG_DEMUX;
 638                 devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1;
 639         }
 640
 641         /* Calculate actual samplerate used and complain if it is different
 642          * from the requested.
 643          */
 644         devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1);
 645         if (devc->flag_reg & FLAG_DEMUX)
 646                 devc->cur_samplerate *= 2;
 647         if (devc->cur_samplerate != samplerate)
 648                 sr_err("ols: can't match samplerate %" PRIu64 ", using %"
 649                        PRIu64, samplerate, devc->cur_samplerate);
 650
 651         return SR_OK;
 652 }
 653
 654 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 655                 const void *value)
 656 {
 657         struct dev_context *devc;
 658         int ret;
 659         const uint64_t *tmp_u64;
 660
 661         devc = sdi->priv;
 662
 663         if (sdi->status != SR_ST_ACTIVE)
 664                 return SR_ERR;
 665
 666         switch (hwcap) {
 667         case SR_HWCAP_SAMPLERATE:
 668                 ret = set_samplerate(sdi, *(const uint64_t *)value);
 669                 break;
 670         case SR_HWCAP_PROBECONFIG:
 671                 ret = configure_probes(devc, (const GSList *)value);
 672                 break;
 673         case SR_HWCAP_LIMIT_SAMPLES:
 674                 tmp_u64 = value;
 675                 if (*tmp_u64 < MIN_NUM_SAMPLES)
 676                         return SR_ERR;
 677                 if (*tmp_u64 > devc->max_samples)
 678                         sr_err("ols: sample limit exceeds hw max");
 679                 devc->limit_samples = *tmp_u64;
 680                 sr_info("ols: sample limit %" PRIu64, devc->limit_samples);
 681                 ret = SR_OK;
 682                 break;
 683         case SR_HWCAP_CAPTURE_RATIO:
 684                 devc->capture_ratio = *(const uint64_t *)value;
 685                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 686                         devc->capture_ratio = 0;
 687                         ret = SR_ERR;
 688                 } else
 689                         ret = SR_OK;
 690                 break;
 691         case SR_HWCAP_RLE:
 692                 if (GPOINTER_TO_INT(value)) {
 693                         sr_info("ols: enabling RLE");
 694                         devc->flag_reg |= FLAG_RLE;
 695                 }
 696                 ret = SR_OK;
 697                 break;
 698         default:
 699                 ret = SR_ERR;
 700         }
 701
 702         return ret;
 703 }
 704
 705 static int receive_data(int fd, int revents, void *cb_data)
 706 {
 707         struct sr_datafeed_packet packet;
 708         struct sr_datafeed_logic logic;
 709         struct sr_dev_inst *sdi;
 710         struct drv_context *drvc;
 711         struct dev_context *devc;
 712         GSList *l;
 713         int num_channels, offset, i, j;
 714         unsigned char byte;
 715
 716         drvc = odi->priv;
 717
 718         /* Find this device's devc struct by its fd. */
 719         devc = NULL;
 720         for (l = drvc->instances; l; l = l->next) {
 721                 sdi = l->data;
 722                 devc = sdi->priv;
 723                 if (devc->serial->fd == fd) {
 724                         break;
 725                 }
 726                 devc = NULL;
 727         }
 728         if (!devc)
 729                 /* Shouldn't happen. */
 730                 return TRUE;
 731
 732         if (devc->num_transfers++ == 0) {
 733                 /*
 734                  * First time round, means the device started sending data,
 735                  * and will not stop until done. If it stops sending for
 736                  * longer than it takes to send a byte, that means it's
 737                  * finished. We'll double that to 30ms to be sure...
 738                  */
 739                 sr_source_remove(fd);
 740                 sr_source_add(fd, G_IO_IN, 30, receive_data, cb_data);
 741                 devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4);
 742                 if (!devc->raw_sample_buf) {
 743                         sr_err("ols: %s: devc->raw_sample_buf malloc failed",
 744                                __func__);
 745                         return FALSE;
 746                 }
 747                 /* fill with 1010... for debugging */
 748                 memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4);
 749         }
 750
 751         num_channels = 0;
 752         for (i = 0x20; i > 0x02; i /= 2) {
 753                 if ((devc->flag_reg & i) == 0)
 754                         num_channels++;
 755         }
 756
 757         if (revents == G_IO_IN) {
 758                 if (serial_read(fd, &byte, 1) != 1)
 759                         return FALSE;
 760
 761                 /* Ignore it if we've read enough. */
 762                 if (devc->num_samples >= devc->limit_samples)
 763                         return TRUE;
 764
 765                 devc->sample[devc->num_bytes++] = byte;
 766                 sr_dbg("ols: received byte 0x%.2x", byte);
 767                 if (devc->num_bytes == num_channels) {
 768                         /* Got a full sample. */
 769                         sr_dbg("ols: received sample 0x%.*x",
 770                                devc->num_bytes * 2, *(int *)devc->sample);
 771                         if (devc->flag_reg & FLAG_RLE) {
 772                                 /*
 773                                  * In RLE mode -1 should never come in as a
 774                                  * sample, because bit 31 is the "count" flag.
 775                                  */
 776                                 if (devc->sample[devc->num_bytes - 1] & 0x80) {
 777                                         devc->sample[devc->num_bytes - 1] &= 0x7f;
 778                                         /*
 779                                          * FIXME: This will only work on
 780                                          * little-endian systems.
 781                                          */
 782                                         devc->rle_count = *(int *)(devc->sample);
 783                                         sr_dbg("ols: RLE count = %d", devc->rle_count);
 784                                         devc->num_bytes = 0;
 785                                         return TRUE;
 786                                 }
 787                         }
 788                         devc->num_samples += devc->rle_count + 1;
 789                         if (devc->num_samples > devc->limit_samples) {
 790                                 /* Save us from overrunning the buffer. */
 791                                 devc->rle_count -= devc->num_samples - devc->limit_samples;
 792                                 devc->num_samples = devc->limit_samples;
 793                         }
 794
 795                         if (num_channels < 4) {
 796                                 /*
 797                                  * Some channel groups may have been turned
 798                                  * off, to speed up transfer between the
 799                                  * hardware and the PC. Expand that here before
 800                                  * submitting it over the session bus --
 801                                  * whatever is listening on the bus will be
 802                                  * expecting a full 32-bit sample, based on
 803                                  * the number of probes.
 804                                  */
 805                                 j = 0;
 806                                 memset(devc->tmp_sample, 0, 4);
 807                                 for (i = 0; i < 4; i++) {
 808                                         if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
 809                                                 /*
 810                                                  * This channel group was
 811                                                  * enabled, copy from received
 812                                                  * sample.
 813                                                  */
 814                                                 devc->tmp_sample[i] = devc->sample[j++];
 815                                         }
 816                                 }
 817                                 memcpy(devc->sample, devc->tmp_sample, 4);
 818                                 sr_dbg("ols: full sample 0x%.8x", *(int *)devc->sample);
 819                         }
 820
 821                         /* the OLS sends its sample buffer backwards.
 822                          * store it in reverse order here, so we can dump
 823                          * this on the session bus later.
 824                          */
 825                         offset = (devc->limit_samples - devc->num_samples) * 4;
 826                         for (i = 0; i <= devc->rle_count; i++) {
 827                                 memcpy(devc->raw_sample_buf + offset + (i * 4),
 828                                        devc->sample, 4);
 829                         }
 830                         memset(devc->sample, 0, 4);
 831                         devc->num_bytes = 0;
 832                         devc->rle_count = 0;
 833                 }
 834         } else {
 835                 /*
 836                  * This is the main loop telling us a timeout was reached, or
 837                  * we've acquired all the samples we asked for -- we're done.
 838                  * Send the (properly-ordered) buffer to the frontend.
 839                  */
 840                 if (devc->trigger_at != -1) {
 841                         /* a trigger was set up, so we need to tell the frontend
 842                          * about it.
 843                          */
 844                         if (devc->trigger_at > 0) {
 845                                 /* there are pre-trigger samples, send those first */
 846                                 packet.type = SR_DF_LOGIC;
 847                                 packet.payload = &logic;
 848                                 logic.length = devc->trigger_at * 4;
 849                                 logic.unitsize = 4;
 850                                 logic.data = devc->raw_sample_buf +
 851                                         (devc->limit_samples - devc->num_samples) * 4;
 852                                 sr_session_send(cb_data, &packet);
 853                         }
 854
 855                         /* send the trigger */
 856                         packet.type = SR_DF_TRIGGER;
 857                         sr_session_send(cb_data, &packet);
 858
 859                         /* send post-trigger samples */
 860                         packet.type = SR_DF_LOGIC;
 861                         packet.payload = &logic;
 862                         logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4);
 863                         logic.unitsize = 4;
 864                         logic.data = devc->raw_sample_buf + devc->trigger_at * 4 +
 865                                 (devc->limit_samples - devc->num_samples) * 4;
 866                         sr_session_send(cb_data, &packet);
 867                 } else {
 868                         /* no trigger was used */
 869                         packet.type = SR_DF_LOGIC;
 870                         packet.payload = &logic;
 871                         logic.length = devc->num_samples * 4;
 872                         logic.unitsize = 4;
 873                         logic.data = devc->raw_sample_buf +
 874                                 (devc->limit_samples - devc->num_samples) * 4;
 875                         sr_session_send(cb_data, &packet);
 876                 }
 877                 g_free(devc->raw_sample_buf);
 878
 879                 serial_flush(fd);
 880                 serial_close(fd);
 881                 packet.type = SR_DF_END;
 882                 sr_session_send(cb_data, &packet);
 883         }
 884
 885         return TRUE;
 886 }
 887
 888 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 889                 void *cb_data)
 890 {
 891         struct sr_datafeed_packet *packet;
 892         struct sr_datafeed_header *header;
 893         struct sr_datafeed_meta_logic meta;
 894         struct dev_context *devc;
 895         uint32_t trigger_config[4];
 896         uint32_t data;
 897         uint16_t readcount, delaycount;
 898         uint8_t changrp_mask;
 899         int num_channels;
 900         int i;
 901
 902         devc = sdi->priv;
 903
 904         if (sdi->status != SR_ST_ACTIVE)
 905                 return SR_ERR;
 906
 907         /*
 908          * Enable/disable channel groups in the flag register according to the
 909          * probe mask. Calculate this here, because num_channels is needed
 910          * to limit readcount.
 911          */
 912         changrp_mask = 0;
 913         num_channels = 0;
 914         for (i = 0; i < 4; i++) {
 915                 if (devc->probe_mask & (0xff << (i * 8))) {
 916                         changrp_mask |= (1 << i);
 917                         num_channels++;
 918                 }
 919         }
 920
 921         /*
 922          * Limit readcount to prevent reading past the end of the hardware
 923          * buffer.
 924          */
 925         readcount = MIN(devc->max_samples / num_channels, devc->limit_samples) / 4;
 926
 927         memset(trigger_config, 0, 16);
 928         trigger_config[devc->num_stages - 1] |= 0x08;
 929         if (devc->trigger_mask[0]) {
 930                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 931                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 932
 933                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_MASK_0,
 934                         reverse32(devc->trigger_mask[0])) != SR_OK)
 935                         return SR_ERR;
 936                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 937                         reverse32(devc->trigger_value[0])) != SR_OK)
 938                         return SR_ERR;
 939                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 940                         trigger_config[0]) != SR_OK)
 941                         return SR_ERR;
 942
 943                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_MASK_1,
 944                         reverse32(devc->trigger_mask[1])) != SR_OK)
 945                         return SR_ERR;
 946                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_VALUE_1,
 947                         reverse32(devc->trigger_value[1])) != SR_OK)
 948                         return SR_ERR;
 949                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_CONFIG_1,
 950                         trigger_config[1]) != SR_OK)
 951                         return SR_ERR;
 952
 953                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_MASK_2,
 954                         reverse32(devc->trigger_mask[2])) != SR_OK)
 955                         return SR_ERR;
 956                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_VALUE_2,
 957                         reverse32(devc->trigger_value[2])) != SR_OK)
 958                         return SR_ERR;
 959                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_CONFIG_2,
 960                         trigger_config[2]) != SR_OK)
 961                         return SR_ERR;
 962
 963                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_MASK_3,
 964                         reverse32(devc->trigger_mask[3])) != SR_OK)
 965                         return SR_ERR;
 966                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_VALUE_3,
 967                         reverse32(devc->trigger_value[3])) != SR_OK)
 968                         return SR_ERR;
 969                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_CONFIG_3,
 970                         trigger_config[3]) != SR_OK)
 971                         return SR_ERR;
 972         } else {
 973                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_MASK_0,
 974                                 devc->trigger_mask[0]) != SR_OK)
 975                         return SR_ERR;
 976                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_VALUE_0,
 977                                 devc->trigger_value[0]) != SR_OK)
 978                         return SR_ERR;
 979                 if (send_longcommand(devc->serial->fd, CMD_SET_TRIGGER_CONFIG_0,
 980                      0x00000008) != SR_OK)
 981                         return SR_ERR;
 982                 delaycount = readcount;
 983         }
 984
 985         sr_info("ols: setting samplerate to %" PRIu64 " Hz (divider %u, "
 986                 "demux %s)", devc->cur_samplerate, devc->cur_samplerate_divider,
 987                 devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 988         if (send_longcommand(devc->serial->fd, CMD_SET_DIVIDER,
 989                         reverse32(devc->cur_samplerate_divider)) != SR_OK)
 990                 return SR_ERR;
 991
 992         /* Send sample limit and pre/post-trigger capture ratio. */
 993         data = ((readcount - 1) & 0xffff) << 16;
 994         data |= (delaycount - 1) & 0xffff;
 995         if (send_longcommand(devc->serial->fd, CMD_CAPTURE_SIZE, reverse16(data)) != SR_OK)
 996                 return SR_ERR;
 997
 998         /* The flag register wants them here, and 1 means "disable channel". */
 999         devc->flag_reg |= ~(changrp_mask << 2) & 0x3c;
1000         devc->flag_reg |= FLAG_FILTER;
1001         devc->rle_count = 0;
1002         data = (devc->flag_reg << 24) | ((devc->flag_reg << 8) & 0xff0000);
1003         if (send_longcommand(devc->serial->fd, CMD_SET_FLAGS, data) != SR_OK)
1004                 return SR_ERR;
1005
1006         /* Start acquisition on the device. */
1007         if (send_shortcommand(devc->serial->fd, CMD_RUN) != SR_OK)
1008                 return SR_ERR;
1009
1010         sr_source_add(devc->serial->fd, G_IO_IN, -1, receive_data,
1011                       cb_data);
1012
1013         if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
1014                 sr_err("ols: %s: packet malloc failed", __func__);
1015                 return SR_ERR_MALLOC;
1016         }
1017
1018         if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
1019                 sr_err("ols: %s: header malloc failed", __func__);
1020                 g_free(packet);
1021                 return SR_ERR_MALLOC;
1022         }
1023
1024         /* Send header packet to the session bus. */
1025         packet->type = SR_DF_HEADER;
1026         packet->payload = (unsigned char *)header;
1027         header->feed_version = 1;
1028         gettimeofday(&header->starttime, NULL);
1029         sr_session_send(cb_data, packet);
1030
1031         /* Send metadata about the SR_DF_LOGIC packets to come. */
1032         packet->type = SR_DF_META_LOGIC;
1033         packet->payload = &meta;
1034         meta.samplerate = devc->cur_samplerate;
1035         meta.num_probes = NUM_PROBES;
1036         sr_session_send(cb_data, packet);
1037
1038         g_free(header);
1039         g_free(packet);
1040
1041         return SR_OK;
1042 }
1043
1044 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
1045 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
1046                 void *cb_data)
1047 {
1048         struct sr_datafeed_packet packet;
1049
1050         /* Avoid compiler warnings. */
1051         (void)sdi;
1052
1053         packet.type = SR_DF_END;
1054         sr_session_send(cb_data, &packet);
1055
1056         return SR_OK;
1057 }
1058
1059 SR_PRIV struct sr_dev_driver ols_driver_info = {
1060         .name = "ols",
1061         .longname = "Openbench Logic Sniffer",
1062         .api_version = 1,
1063         .init = hw_init,
1064         .cleanup = hw_cleanup,
1065         .scan = hw_scan,
1066         .dev_open = hw_dev_open,
1067         .dev_close = hw_dev_close,
1068         .info_get = hw_info_get,
1069         .dev_config_set = hw_dev_config_set,
1070         .dev_acquisition_start = hw_dev_acquisition_start,
1071         .dev_acquisition_stop = hw_dev_acquisition_stop,
1072         .priv = NULL,
1073 };