src/hardware/pipistrello-ols/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 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 "protocol.h"
  21
  22 static const uint32_t hwcaps[] = {
  23         SR_CONF_LOGIC_ANALYZER,
  24         SR_CONF_SAMPLERATE,
  25         SR_CONF_TRIGGER_MATCH,
  26         SR_CONF_CAPTURE_RATIO,
  27         SR_CONF_LIMIT_SAMPLES,
  28         SR_CONF_PATTERN_MODE,
  29         SR_CONF_EXTERNAL_CLOCK,
  30         SR_CONF_SWAP,
  31         SR_CONF_RLE,
  32 };
  33
  34 static const int32_t trigger_matches[] = {
  35         SR_TRIGGER_ZERO,
  36         SR_TRIGGER_ONE,
  37         SR_TRIGGER_RISING,
  38         SR_TRIGGER_FALLING,
  39 };
  40
  41 #define STR_PATTERN_NONE     "None"
  42 #define STR_PATTERN_EXTERNAL "External"
  43 #define STR_PATTERN_INTERNAL "Internal"
  44
  45 /* Supported methods of test pattern outputs */
  46 enum {
  47         /**
  48          * Capture pins 31:16 (unbuffered wing) output a test pattern
  49          * that can captured on pins 0:15.
  50          */
  51         PATTERN_EXTERNAL,
  52
  53         /** Route test pattern internally to capture buffer. */
  54         PATTERN_INTERNAL,
  55 };
  56
  57 static const char *patterns[] = {
  58         STR_PATTERN_NONE,
  59         STR_PATTERN_EXTERNAL,
  60         STR_PATTERN_INTERNAL,
  61 };
  62
  63 /* Channels are numbered 0-31 (on the PCB silkscreen). */
  64 SR_PRIV const char *p_ols_channel_names[NUM_CHANNELS + 1] = {
  65         "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
  66         "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
  67         "24", "25", "26", "27", "28", "29", "30", "31",
  68         NULL,
  69 };
  70
  71 /* Default supported samplerates, can be overridden by device metadata. */
  72 static const uint64_t samplerates[] = {
  73         SR_HZ(10),
  74         SR_MHZ(200),
  75         SR_HZ(1),
  76 };
  77
  78 SR_PRIV struct sr_dev_driver p_ols_driver_info;
  79 static struct sr_dev_driver *di = &p_ols_driver_info;
  80
  81 static int init(struct sr_context *sr_ctx)
  82 {
  83         return std_init(sr_ctx, di, LOG_PREFIX);
  84 }
  85
  86 static GSList *scan(GSList *options)
  87 {
  88         struct sr_dev_inst *sdi;
  89         struct drv_context *drvc;
  90         struct dev_context *devc;
  91         GSList *devices;
  92         int ret, i;
  93         char buf[70];
  94         int bytes_read;
  95
  96         (void)options;
  97
  98         drvc = di->priv;
  99
 100         devices = NULL;
 101
 102         /* Allocate memory for our private device context. */
 103         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 104                 sr_err("Device context malloc failed.");
 105                 goto err_free_nothing;
 106         }
 107
 108         /* Device-specific settings */
 109         devc->max_samplebytes = devc->max_samplerate = devc->protocol_version = 0;
 110
 111         /* Acquisition settings */
 112         devc->limit_samples = devc->capture_ratio = 0;
 113         devc->trigger_at = -1;
 114         devc->channel_mask = 0xffffffff;
 115         devc->flag_reg = 0;
 116
 117         /* Allocate memory for the incoming ftdi data. */
 118         if (!(devc->ftdi_buf = g_try_malloc0(FTDI_BUF_SIZE))) {
 119                 sr_err("ftdi_buf malloc failed.");
 120                 goto err_free_devc;
 121         }
 122
 123         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
 124         if (!(devc->ftdic = ftdi_new())) {
 125                 sr_err("Failed to initialize libftdi.");
 126                 goto err_free_ftdi_buf;;
 127         }
 128
 129         /* Try to open the FTDI device */
 130         if (p_ols_open(devc) != SR_OK) {
 131                 goto err_free_ftdic;
 132         }
 133
 134         /* The discovery procedure is like this: first send the Reset
 135          * command (0x00) 5 times, since the device could be anywhere
 136          * in a 5-byte command. Then send the ID command (0x02).
 137          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 138          * have a match.
 139          */
 140
 141         ret = SR_OK;
 142         for (i = 0; i < 5; i++) {
 143                 if ((ret = write_shortcommand(devc, CMD_RESET)) != SR_OK) {
 144                         break;
 145                 }
 146         }
 147         if (ret != SR_OK) {
 148                 sr_err("Could not reset device. Quitting.");
 149                 goto err_close_ftdic;
 150         }
 151         write_shortcommand(devc, CMD_ID);
 152
 153         /* Read the response data. */
 154         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 4);
 155         if (bytes_read < 0) {
 156                 sr_err("Failed to read FTDI data (%d): %s.",
 157                        bytes_read, ftdi_get_error_string(devc->ftdic));
 158                 goto err_close_ftdic;
 159         }
 160         if (bytes_read == 0) {
 161                 goto err_close_ftdic;
 162         }
 163
 164         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 165                 goto err_close_ftdic;
 166
 167         /* Definitely using the OLS protocol, check if it supports
 168          * the metadata command.
 169          */
 170         write_shortcommand(devc, CMD_METADATA);
 171
 172         /* Read the metadata. */
 173         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 64);
 174         if (bytes_read < 0) {
 175                 sr_err("Failed to read FTDI data (%d): %s.",
 176                        bytes_read, ftdi_get_error_string(devc->ftdic));
 177                 goto err_close_ftdic;
 178         }
 179         if (bytes_read == 0) {
 180                 goto err_close_ftdic;
 181         }
 182
 183         /* Close device. We'll reopen it again when we need it. */
 184         p_ols_close(devc);
 185
 186         /* Parse the metadata. */
 187         sdi = p_ols_get_metadata((uint8_t *)buf, bytes_read, devc);
 188         sdi->index = 0;
 189
 190         /* Configure samplerate and divider. */
 191         if (p_ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 192                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 193                                 DEFAULT_SAMPLERATE);
 194
 195         drvc->instances = g_slist_append(drvc->instances, sdi);
 196         devices = g_slist_append(devices, sdi);
 197
 198         return devices;
 199
 200 err_close_ftdic:
 201         p_ols_close(devc);
 202 err_free_ftdic:
 203         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
 204 err_free_ftdi_buf:
 205         g_free(devc->ftdi_buf);
 206 err_free_devc:
 207         g_free(devc);
 208 err_free_nothing:
 209
 210         return NULL;
 211 }
 212
 213 static GSList *dev_list(void)
 214 {
 215         return ((struct drv_context *)(di->priv))->instances;
 216 }
 217
 218 static void clear_helper(void *priv)
 219 {
 220         struct dev_context *devc;
 221
 222         devc = priv;
 223
 224         ftdi_free(devc->ftdic);
 225         g_free(devc->ftdi_buf);
 226 }
 227
 228 static int dev_clear(void)
 229 {
 230         return std_dev_clear(di, clear_helper);
 231 }
 232
 233 static int cleanup(void)
 234 {
 235         return dev_clear();
 236 }
 237
 238
 239 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 240                 const struct sr_channel_group *cg)
 241 {
 242         struct dev_context *devc;
 243
 244         (void)cg;
 245
 246         if (!sdi)
 247                 return SR_ERR_ARG;
 248
 249         devc = sdi->priv;
 250         switch (key) {
 251         case SR_CONF_SAMPLERATE:
 252                 *data = g_variant_new_uint64(devc->cur_samplerate);
 253                 break;
 254         case SR_CONF_CAPTURE_RATIO:
 255                 *data = g_variant_new_uint64(devc->capture_ratio);
 256                 break;
 257         case SR_CONF_LIMIT_SAMPLES:
 258                 *data = g_variant_new_uint64(devc->limit_samples);
 259                 break;
 260         case SR_CONF_PATTERN_MODE:
 261                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 262                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 263                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 264                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 265                 else
 266                         *data = g_variant_new_string(STR_PATTERN_NONE);
 267                 break;
 268         case SR_CONF_RLE:
 269                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 270                 break;
 271         case SR_CONF_EXTERNAL_CLOCK:
 272                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
 273                 break;
 274         default:
 275                 return SR_ERR_NA;
 276         }
 277
 278         return SR_OK;
 279 }
 280
 281 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 282                 const struct sr_channel_group *cg)
 283 {
 284         struct dev_context *devc;
 285         uint16_t flag;
 286         uint64_t tmp_u64;
 287         int ret;
 288         const char *stropt;
 289
 290         (void)cg;
 291
 292         if (sdi->status != SR_ST_ACTIVE)
 293                 return SR_ERR_DEV_CLOSED;
 294
 295         devc = sdi->priv;
 296
 297         switch (key) {
 298         case SR_CONF_SAMPLERATE:
 299                 tmp_u64 = g_variant_get_uint64(data);
 300                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 301                         return SR_ERR_SAMPLERATE;
 302                 ret = p_ols_set_samplerate(sdi, g_variant_get_uint64(data));
 303                 break;
 304         case SR_CONF_LIMIT_SAMPLES:
 305                 tmp_u64 = g_variant_get_uint64(data);
 306                 if (tmp_u64 < MIN_NUM_SAMPLES)
 307                         return SR_ERR;
 308                 devc->limit_samples = tmp_u64;
 309                 ret = SR_OK;
 310                 break;
 311         case SR_CONF_CAPTURE_RATIO:
 312                 devc->capture_ratio = g_variant_get_uint64(data);
 313                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 314                         devc->capture_ratio = 0;
 315                         ret = SR_ERR;
 316                 } else
 317                         ret = SR_OK;
 318                 break;
 319         case SR_CONF_EXTERNAL_CLOCK:
 320                 if (g_variant_get_boolean(data)) {
 321                         sr_info("Enabling external clock.");
 322                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 323                 } else {
 324                         sr_info("Disabled external clock.");
 325                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 326                 }
 327                 ret = SR_OK;
 328                 break;
 329         case SR_CONF_PATTERN_MODE:
 330                 stropt = g_variant_get_string(data, NULL);
 331                 ret = SR_OK;
 332                 flag = 0xffff;
 333                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 334                         sr_info("Disabling test modes.");
 335                         flag = 0x0000;
 336                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 337                         sr_info("Enabling internal test mode.");
 338                         flag = FLAG_INTERNAL_TEST_MODE;
 339                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 340                         sr_info("Enabling external test mode.");
 341                         flag = FLAG_EXTERNAL_TEST_MODE;
 342                 } else {
 343                         ret = SR_ERR;
 344                 }
 345                 if (flag != 0xffff) {
 346                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 347                         devc->flag_reg |= flag;
 348                 }
 349                 break;
 350         case SR_CONF_SWAP:
 351                 if (g_variant_get_boolean(data)) {
 352                         sr_info("Enabling channel swapping.");
 353                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 354                 } else {
 355                         sr_info("Disabling channel swapping.");
 356                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 357                 }
 358                 ret = SR_OK;
 359                 break;
 360
 361         case SR_CONF_RLE:
 362                 if (g_variant_get_boolean(data)) {
 363                         sr_info("Enabling RLE.");
 364                         devc->flag_reg |= FLAG_RLE;
 365                 } else {
 366                         sr_info("Disabling RLE.");
 367                         devc->flag_reg &= ~FLAG_RLE;
 368                 }
 369                 ret = SR_OK;
 370                 break;
 371         default:
 372                 ret = SR_ERR_NA;
 373         }
 374
 375         return ret;
 376 }
 377
 378 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 379                 const struct sr_channel_group *cg)
 380 {
 381         struct dev_context *devc;
 382         GVariant *gvar, *grange[2];
 383         GVariantBuilder gvb;
 384         int num_pols_changrp, i;
 385
 386         (void)cg;
 387
 388         switch (key) {
 389         case SR_CONF_DEVICE_OPTIONS:
 390                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 391                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(uint32_t));
 392                 break;
 393         case SR_CONF_SAMPLERATE:
 394                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 395                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 396                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 397                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 398                 *data = g_variant_builder_end(&gvb);
 399                 break;
 400         case SR_CONF_TRIGGER_MATCH:
 401                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 402                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 403                                 sizeof(int32_t));
 404                 break;
 405         case SR_CONF_PATTERN_MODE:
 406                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 407                 break;
 408         case SR_CONF_LIMIT_SAMPLES:
 409                 if (!sdi)
 410                         return SR_ERR_ARG;
 411                 devc = sdi->priv;
 412                 if (devc->flag_reg & FLAG_RLE)
 413                         return SR_ERR_NA;
 414                 if (devc->max_samplebytes == 0)
 415                         /* Device didn't specify sample memory size in metadata. */
 416                         return SR_ERR_NA;
 417                 /*
 418                  * Channel groups are turned off if no channels in that group are
 419                  * enabled, making more room for samples for the enabled group.
 420                 */
 421                 pols_channel_mask(sdi);
 422                 num_pols_changrp = 0;
 423                 for (i = 0; i < 4; i++) {
 424                         if (devc->channel_mask & (0xff << (i * 8)))
 425                                 num_pols_changrp++;
 426                 }
 427                 /* 3 channel groups takes as many bytes as 4 channel groups */
 428                 if (num_pols_changrp == 3)
 429                         num_pols_changrp = 4;
 430                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 431                 if (num_pols_changrp)
 432                         grange[1] = g_variant_new_uint64(devc->max_samplebytes / num_pols_changrp);
 433                 else
 434                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 435                 *data = g_variant_new_tuple(grange, 2);
 436                 break;
 437         default:
 438                 return SR_ERR_NA;
 439         }
 440
 441         return SR_OK;
 442 }
 443
 444 static int dev_open(struct sr_dev_inst *sdi)
 445 {
 446         struct dev_context *devc;
 447
 448         devc = sdi->priv;
 449
 450         if (p_ols_open(devc) != SR_OK) {
 451                 return SR_ERR;
 452         } else {
 453           sdi->status = SR_ST_ACTIVE;
 454                 return SR_OK;
 455         }
 456 }
 457
 458 static int dev_close(struct sr_dev_inst *sdi)
 459 {
 460         int ret;
 461         struct dev_context *devc;
 462
 463         ret = SR_OK;
 464         devc = sdi->priv;
 465
 466         if (sdi->status == SR_ST_ACTIVE) {
 467                 sr_dbg("Status ACTIVE, closing device.");
 468                 ret = p_ols_close(devc);
 469         } else {
 470                 sr_spew("Status not ACTIVE, nothing to do.");
 471         }
 472
 473         sdi->status = SR_ST_INACTIVE;
 474
 475         return ret;
 476 }
 477
 478
 479 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 480 {
 481         struct dev_context *devc;
 482         uint8_t cmd, arg[4];
 483
 484         devc = sdi->priv;
 485
 486         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 487         arg[0] = devc->trigger_mask[stage] & 0xff;
 488         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 489         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 490         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 491         if (write_longcommand(devc, cmd, arg) != SR_OK)
 492                 return SR_ERR;
 493
 494         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 495         arg[0] = devc->trigger_value[stage] & 0xff;
 496         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 497         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 498         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 499         if (write_longcommand(devc, cmd, arg) != SR_OK)
 500                 return SR_ERR;
 501
 502         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 503         arg[0] = arg[1] = arg[3] = 0x00;
 504         arg[2] = stage;
 505         if (stage == devc->num_stages)
 506                 /* Last stage, fire when this one matches. */
 507                 arg[3] |= TRIGGER_START;
 508         if (write_longcommand(devc, cmd, arg) != SR_OK)
 509                 return SR_ERR;
 510
 511         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 512         arg[0] = devc->trigger_edge[stage] & 0xff;
 513         arg[1] = (devc->trigger_edge[stage] >> 8) & 0xff;
 514         arg[2] = (devc->trigger_edge[stage] >> 16) & 0xff;
 515         arg[3] = (devc->trigger_edge[stage] >> 24) & 0xff;
 516         if (write_longcommand(devc, cmd, arg) != SR_OK)
 517                 return SR_ERR;
 518
 519         return SR_OK;
 520 }
 521
 522 static int disable_trigger(const struct sr_dev_inst *sdi, int stage)
 523 {
 524         struct dev_context *devc;
 525         uint8_t cmd, arg[4];
 526
 527         devc = sdi->priv;
 528
 529         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 530         arg[0] = arg[1] = arg[2] = arg[3] = 0x00;
 531         if (write_longcommand(devc, cmd, arg) != SR_OK)
 532                 return SR_ERR;
 533
 534         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 535         if (write_longcommand(devc, cmd, arg) != SR_OK)
 536                 return SR_ERR;
 537
 538         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 539         arg[2] = 0x03;
 540         if (write_longcommand(devc, cmd, arg) != SR_OK)
 541                 return SR_ERR;
 542
 543         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 544         arg[2] = 0x00;
 545         if (write_longcommand(devc, cmd, arg) != SR_OK)
 546                 return SR_ERR;
 547
 548         return SR_OK;
 549 }
 550
 551 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 552                 void *cb_data)
 553 {
 554         struct dev_context *devc;
 555         uint32_t samplecount, readcount, delaycount;
 556         uint8_t pols_changrp_mask, arg[4];
 557         uint16_t flag_tmp;
 558         int num_pols_changrp, samplespercount;
 559         int ret, i;
 560
 561         if (sdi->status != SR_ST_ACTIVE)
 562                 return SR_ERR_DEV_CLOSED;
 563
 564         devc = sdi->priv;
 565
 566         pols_channel_mask(sdi);
 567
 568         /*
 569          * Enable/disable channel groups in the flag register according to the
 570          * channel mask. Calculate this here, because num_pols_changrp is
 571          * needed to limit readcount.
 572          */
 573         pols_changrp_mask = 0;
 574         num_pols_changrp = 0;
 575         for (i = 0; i < 4; i++) {
 576                 if (devc->channel_mask & (0xff << (i * 8))) {
 577                         pols_changrp_mask |= (1 << i);
 578                         num_pols_changrp++;
 579                 }
 580         }
 581         /* 3 channel groups takes as many bytes as 4 channel groups */
 582         if (num_pols_changrp == 3)
 583                 num_pols_changrp = 4;
 584         /* maximum number of samples (or RLE counts) the buffer memory can hold */
 585         devc->max_samples = devc->max_samplebytes / num_pols_changrp;
 586
 587         /*
 588          * Limit readcount to prevent reading past the end of the hardware
 589          * buffer.
 590          */
 591         sr_dbg("max_samples = %d", devc->max_samples);
 592         sr_dbg("limit_samples = %d", devc->limit_samples);
 593         samplecount = MIN(devc->max_samples, devc->limit_samples);
 594         sr_dbg("Samplecount = %d", samplecount);
 595
 596         /* In demux mode the OLS is processing two samples per clock */
 597         if (devc->flag_reg & FLAG_DEMUX) {
 598                 samplespercount = 8;
 599         }
 600         else {
 601                 samplespercount = 4;
 602         }
 603
 604         readcount = samplecount / samplespercount;
 605
 606         /* Rather read too many samples than too few. */
 607         if (samplecount % samplespercount != 0)
 608                 readcount++;
 609
 610         /* Basic triggers. */
 611         if (pols_convert_trigger(sdi) != SR_OK) {
 612                 sr_err("Failed to configure channels.");
 613                 return SR_ERR;
 614         }
 615
 616         if (devc->num_stages > 0) {
 617                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 618                 devc->trigger_at = (readcount - delaycount) * samplespercount - devc->num_stages;
 619                 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 620                         if (i <= devc->num_stages) {
 621                                 sr_dbg("Setting p-ols stage %d trigger.", i);
 622                                 if ((ret = set_trigger(sdi, i)) != SR_OK)
 623                                         return ret;
 624                         }
 625                         else {
 626                                 sr_dbg("Disabling p-ols stage %d trigger.", i);
 627                                 if ((ret = disable_trigger(sdi, i)) != SR_OK)
 628                                         return ret;
 629                         }
 630                 }
 631         } else {
 632                 /* No triggers configured, force trigger on first stage. */
 633                 sr_dbg("Forcing trigger at stage 0.");
 634                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 635                         return ret;
 636                 delaycount = readcount;
 637         }
 638
 639         /* Samplerate. */
 640         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 641                         devc->cur_samplerate, devc->cur_samplerate_divider);
 642         arg[0] = devc->cur_samplerate_divider & 0xff;
 643         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 644         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 645         arg[3] = 0x00;
 646         if (write_longcommand(devc, CMD_SET_DIVIDER, arg) != SR_OK)
 647                 return SR_ERR;
 648
 649         /* Send extended sample limit and pre/post-trigger capture ratio. */
 650         arg[0] = ((readcount - 1) & 0xff);
 651         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 652         arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 653         arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 654         if (write_longcommand(devc, CMD_CAPTURE_DELAY, arg) != SR_OK)
 655                 return SR_ERR;
 656         arg[0] = ((delaycount - 1) & 0xff);
 657         arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 658         arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 659         arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 660         if (write_longcommand(devc, CMD_CAPTURE_COUNT, arg) != SR_OK)
 661                 return SR_ERR;
 662
 663         /* Flag register. */
 664         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 665                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 666                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 667                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 668                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 669                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 670
 671         /*
 672         * Enable/disable OLS channel groups in the flag register according
 673         * to the channel mask. 1 means "disable channel".
 674         */
 675         devc->flag_reg &= ~0x3c;
 676         devc->flag_reg |= ~(pols_changrp_mask << 2) & 0x3c;
 677         sr_dbg("flag_reg = %x", devc->flag_reg);
 678
 679         /*
 680         * In demux mode the OLS is processing two 8-bit or 16-bit samples
 681         * in parallel and for this to work the lower two bits of the four
 682         * "channel_disable" bits must be replicated to the upper two bits.
 683         */
 684         flag_tmp = devc->flag_reg;
 685         if (devc->flag_reg & FLAG_DEMUX) {
 686                 flag_tmp &= ~0x30;
 687                 flag_tmp |= ~(pols_changrp_mask << 4) & 0x30;
 688         }
 689         arg[0] = flag_tmp & 0xff;
 690         arg[1] = flag_tmp >> 8;
 691         arg[2] = arg[3] = 0x00;
 692         if (write_longcommand(devc, CMD_SET_FLAGS, arg) != SR_OK)
 693                 return SR_ERR;
 694
 695         /* Start acquisition on the device. */
 696         if (write_shortcommand(devc, CMD_RUN) != SR_OK)
 697                 return SR_ERR;
 698
 699         /* Reset all operational states. */
 700         devc->rle_count = devc->num_transfers = 0;
 701         devc->num_samples = devc->num_bytes = 0;
 702         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 703         memset(devc->sample, 0, 4);
 704
 705         /* Send header packet to the session bus. */
 706         std_session_send_df_header(cb_data, LOG_PREFIX);
 707
 708         /* Hook up a dummy handler to receive data from the device. */
 709         sr_session_source_add(sdi->session, 0, G_IO_IN, 10, p_ols_receive_data,
 710                         cb_data);
 711
 712         return SR_OK;
 713 }
 714
 715
 716
 717 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 718 {
 719         struct dev_context *devc;
 720         struct sr_datafeed_packet packet;
 721
 722         devc = sdi->priv;
 723
 724         sr_dbg("Stopping acquisition.");
 725         write_shortcommand(devc, CMD_RESET);
 726         write_shortcommand(devc, CMD_RESET);
 727         write_shortcommand(devc, CMD_RESET);
 728         write_shortcommand(devc, CMD_RESET);
 729         write_shortcommand(devc, CMD_RESET);
 730
 731         sr_session_source_remove(sdi->session, 0);
 732
 733         /* Send end packet to the session bus. */
 734         sr_dbg("Sending SR_DF_END.");
 735         packet.type = SR_DF_END;
 736         sr_session_send(cb_data, &packet);
 737
 738         return SR_OK;
 739 }
 740
 741 SR_PRIV struct sr_dev_driver p_ols_driver_info = {
 742         .name = "p-ols",
 743         .longname = "Pipistrello OLS",
 744         .api_version = 1,
 745         .init = init,
 746         .cleanup = cleanup,
 747         .scan = scan,
 748         .dev_list = dev_list,
 749         .dev_clear = dev_clear,
 750         .config_get = config_get,
 751         .config_set = config_set,
 752         .config_list = config_list,
 753         .dev_open = dev_open,
 754         .dev_close = dev_close,
 755         .dev_acquisition_start = dev_acquisition_start,
 756         .dev_acquisition_stop = dev_acquisition_stop,
 757         .priv = NULL,
 758 };