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 <config.h>
  21 #include "protocol.h"
  22
  23 static const uint32_t devopts[] = {
  24         SR_CONF_LOGIC_ANALYZER,
  25         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  26         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  27         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  28         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  29         SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  30         SR_CONF_EXTERNAL_CLOCK | SR_CONF_GET | SR_CONF_SET,
  31         SR_CONF_SWAP | SR_CONF_SET,
  32         SR_CONF_RLE | SR_CONF_GET | SR_CONF_SET,
  33 };
  34
  35 static const int32_t trigger_matches[] = {
  36         SR_TRIGGER_ZERO,
  37         SR_TRIGGER_ONE,
  38         SR_TRIGGER_RISING,
  39         SR_TRIGGER_FALLING,
  40 };
  41
  42 #define STR_PATTERN_NONE     "None"
  43 #define STR_PATTERN_EXTERNAL "External"
  44 #define STR_PATTERN_INTERNAL "Internal"
  45
  46 /* Supported methods of test pattern outputs */
  47 enum {
  48         /**
  49          * Capture pins 31:16 (unbuffered wing) output a test pattern
  50          * that can captured on pins 0:15.
  51          */
  52         PATTERN_EXTERNAL,
  53
  54         /** Route test pattern internally to capture buffer. */
  55         PATTERN_INTERNAL,
  56 };
  57
  58 static const char *patterns[] = {
  59         STR_PATTERN_NONE,
  60         STR_PATTERN_EXTERNAL,
  61         STR_PATTERN_INTERNAL,
  62 };
  63
  64 /* Channels are numbered 0-31 (on the PCB silkscreen). */
  65 SR_PRIV const char *p_ols_channel_names[] = {
  66         "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
  67         "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
  68         "24", "25", "26", "27", "28", "29", "30", "31",
  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 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  79 {
  80         struct sr_dev_inst *sdi;
  81         struct drv_context *drvc;
  82         struct dev_context *devc;
  83         GSList *devices;
  84         int ret, i;
  85         char buf[70];
  86         int bytes_read;
  87
  88         (void)options;
  89
  90         drvc = di->context;
  91
  92         devices = NULL;
  93
  94         /* Allocate memory for our private device context. */
  95         devc = g_malloc0(sizeof(struct dev_context));
  96
  97         /* Device-specific settings */
  98         devc->max_samplebytes = devc->max_samplerate = devc->protocol_version = 0;
  99
 100         /* Acquisition settings */
 101         devc->limit_samples = devc->capture_ratio = 0;
 102         devc->trigger_at = -1;
 103         devc->channel_mask = 0xffffffff;
 104         devc->flag_reg = 0;
 105
 106         /* Allocate memory for the incoming ftdi data. */
 107         devc->ftdi_buf = g_malloc0(FTDI_BUF_SIZE);
 108
 109         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
 110         if (!(devc->ftdic = ftdi_new())) {
 111                 sr_err("Failed to initialize libftdi.");
 112                 goto err_free_ftdi_buf;;
 113         }
 114
 115         /* Try to open the FTDI device */
 116         if (p_ols_open(devc) != SR_OK) {
 117                 goto err_free_ftdic;
 118         }
 119
 120         /* The discovery procedure is like this: first send the Reset
 121          * command (0x00) 5 times, since the device could be anywhere
 122          * in a 5-byte command. Then send the ID command (0x02).
 123          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 124          * have a match.
 125          */
 126
 127         ret = SR_OK;
 128         for (i = 0; i < 5; i++) {
 129                 if ((ret = write_shortcommand(devc, CMD_RESET)) != SR_OK) {
 130                         break;
 131                 }
 132         }
 133         if (ret != SR_OK) {
 134                 sr_err("Could not reset device. Quitting.");
 135                 goto err_close_ftdic;
 136         }
 137         write_shortcommand(devc, CMD_ID);
 138
 139         /* Read the response data. */
 140         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 4);
 141         if (bytes_read < 0) {
 142                 sr_err("Failed to read FTDI data (%d): %s.",
 143                        bytes_read, ftdi_get_error_string(devc->ftdic));
 144                 goto err_close_ftdic;
 145         }
 146         if (bytes_read == 0) {
 147                 goto err_close_ftdic;
 148         }
 149
 150         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 151                 goto err_close_ftdic;
 152
 153         /* Definitely using the OLS protocol, check if it supports
 154          * the metadata command.
 155          */
 156         write_shortcommand(devc, CMD_METADATA);
 157
 158         /* Read the metadata. */
 159         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 64);
 160         if (bytes_read < 0) {
 161                 sr_err("Failed to read FTDI data (%d): %s.",
 162                        bytes_read, ftdi_get_error_string(devc->ftdic));
 163                 goto err_close_ftdic;
 164         }
 165         if (bytes_read == 0) {
 166                 goto err_close_ftdic;
 167         }
 168
 169         /* Close device. We'll reopen it again when we need it. */
 170         p_ols_close(devc);
 171
 172         /* Parse the metadata. */
 173         sdi = p_ols_get_metadata((uint8_t *)buf, bytes_read, devc);
 174
 175         /* Configure samplerate and divider. */
 176         if (p_ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 177                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 178                                 DEFAULT_SAMPLERATE);
 179
 180         drvc->instances = g_slist_append(drvc->instances, sdi);
 181         devices = g_slist_append(devices, sdi);
 182
 183         return devices;
 184
 185 err_close_ftdic:
 186         p_ols_close(devc);
 187 err_free_ftdic:
 188         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
 189 err_free_ftdi_buf:
 190         g_free(devc->ftdi_buf);
 191         g_free(devc);
 192
 193         return NULL;
 194 }
 195
 196 static void clear_helper(void *priv)
 197 {
 198         struct dev_context *devc;
 199
 200         devc = priv;
 201
 202         ftdi_free(devc->ftdic);
 203         g_free(devc->ftdi_buf);
 204 }
 205
 206 static int dev_clear(const struct sr_dev_driver *di)
 207 {
 208         return std_dev_clear(di, clear_helper);
 209 }
 210
 211 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 212                 const struct sr_channel_group *cg)
 213 {
 214         struct dev_context *devc;
 215
 216         (void)cg;
 217
 218         if (!sdi)
 219                 return SR_ERR_ARG;
 220
 221         devc = sdi->priv;
 222         switch (key) {
 223         case SR_CONF_SAMPLERATE:
 224                 *data = g_variant_new_uint64(devc->cur_samplerate);
 225                 break;
 226         case SR_CONF_CAPTURE_RATIO:
 227                 *data = g_variant_new_uint64(devc->capture_ratio);
 228                 break;
 229         case SR_CONF_LIMIT_SAMPLES:
 230                 *data = g_variant_new_uint64(devc->limit_samples);
 231                 break;
 232         case SR_CONF_PATTERN_MODE:
 233                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 234                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 235                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 236                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 237                 else
 238                         *data = g_variant_new_string(STR_PATTERN_NONE);
 239                 break;
 240         case SR_CONF_RLE:
 241                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 242                 break;
 243         case SR_CONF_EXTERNAL_CLOCK:
 244                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
 245                 break;
 246         default:
 247                 return SR_ERR_NA;
 248         }
 249
 250         return SR_OK;
 251 }
 252
 253 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 254                 const struct sr_channel_group *cg)
 255 {
 256         struct dev_context *devc;
 257         uint16_t flag;
 258         uint64_t tmp_u64;
 259         int ret;
 260         const char *stropt;
 261
 262         (void)cg;
 263
 264         if (sdi->status != SR_ST_ACTIVE)
 265                 return SR_ERR_DEV_CLOSED;
 266
 267         devc = sdi->priv;
 268
 269         switch (key) {
 270         case SR_CONF_SAMPLERATE:
 271                 tmp_u64 = g_variant_get_uint64(data);
 272                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 273                         return SR_ERR_SAMPLERATE;
 274                 ret = p_ols_set_samplerate(sdi, g_variant_get_uint64(data));
 275                 break;
 276         case SR_CONF_LIMIT_SAMPLES:
 277                 tmp_u64 = g_variant_get_uint64(data);
 278                 if (tmp_u64 < MIN_NUM_SAMPLES)
 279                         return SR_ERR;
 280                 devc->limit_samples = tmp_u64;
 281                 ret = SR_OK;
 282                 break;
 283         case SR_CONF_CAPTURE_RATIO:
 284                 devc->capture_ratio = g_variant_get_uint64(data);
 285                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100)
 286                         ret = SR_ERR;
 287                 else
 288                         ret = SR_OK;
 289                 break;
 290         case SR_CONF_EXTERNAL_CLOCK:
 291                 if (g_variant_get_boolean(data)) {
 292                         sr_info("Enabling external clock.");
 293                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 294                 } else {
 295                         sr_info("Disabled external clock.");
 296                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 297                 }
 298                 ret = SR_OK;
 299                 break;
 300         case SR_CONF_PATTERN_MODE:
 301                 stropt = g_variant_get_string(data, NULL);
 302                 ret = SR_OK;
 303                 flag = 0xffff;
 304                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 305                         sr_info("Disabling test modes.");
 306                         flag = 0x0000;
 307                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 308                         sr_info("Enabling internal test mode.");
 309                         flag = FLAG_INTERNAL_TEST_MODE;
 310                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 311                         sr_info("Enabling external test mode.");
 312                         flag = FLAG_EXTERNAL_TEST_MODE;
 313                 } else {
 314                         ret = SR_ERR;
 315                 }
 316                 if (flag != 0xffff) {
 317                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 318                         devc->flag_reg |= flag;
 319                 }
 320                 break;
 321         case SR_CONF_SWAP:
 322                 if (g_variant_get_boolean(data)) {
 323                         sr_info("Enabling channel swapping.");
 324                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 325                 } else {
 326                         sr_info("Disabling channel swapping.");
 327                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 328                 }
 329                 ret = SR_OK;
 330                 break;
 331
 332         case SR_CONF_RLE:
 333                 if (g_variant_get_boolean(data)) {
 334                         sr_info("Enabling RLE.");
 335                         devc->flag_reg |= FLAG_RLE;
 336                 } else {
 337                         sr_info("Disabling RLE.");
 338                         devc->flag_reg &= ~FLAG_RLE;
 339                 }
 340                 ret = SR_OK;
 341                 break;
 342         default:
 343                 ret = SR_ERR_NA;
 344         }
 345
 346         return ret;
 347 }
 348
 349 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 350                 const struct sr_channel_group *cg)
 351 {
 352         struct dev_context *devc;
 353         GVariant *gvar, *grange[2];
 354         GVariantBuilder gvb;
 355         int num_pols_changrp, i;
 356
 357         (void)cg;
 358
 359         switch (key) {
 360         case SR_CONF_DEVICE_OPTIONS:
 361                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 362                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 363                 break;
 364         case SR_CONF_SAMPLERATE:
 365                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 366                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 367                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 368                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 369                 *data = g_variant_builder_end(&gvb);
 370                 break;
 371         case SR_CONF_TRIGGER_MATCH:
 372                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 373                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 374                                 sizeof(int32_t));
 375                 break;
 376         case SR_CONF_PATTERN_MODE:
 377                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 378                 break;
 379         case SR_CONF_LIMIT_SAMPLES:
 380                 if (!sdi)
 381                         return SR_ERR_ARG;
 382                 devc = sdi->priv;
 383                 if (devc->flag_reg & FLAG_RLE)
 384                         return SR_ERR_NA;
 385                 if (devc->max_samplebytes == 0)
 386                         /* Device didn't specify sample memory size in metadata. */
 387                         return SR_ERR_NA;
 388                 /*
 389                  * Channel groups are turned off if no channels in that group are
 390                  * enabled, making more room for samples for the enabled group.
 391                 */
 392                 pols_channel_mask(sdi);
 393                 num_pols_changrp = 0;
 394                 for (i = 0; i < 4; i++) {
 395                         if (devc->channel_mask & (0xff << (i * 8)))
 396                                 num_pols_changrp++;
 397                 }
 398                 /* 3 channel groups takes as many bytes as 4 channel groups */
 399                 if (num_pols_changrp == 3)
 400                         num_pols_changrp = 4;
 401                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 402                 if (num_pols_changrp)
 403                         grange[1] = g_variant_new_uint64(devc->max_samplebytes / num_pols_changrp);
 404                 else
 405                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 406                 *data = g_variant_new_tuple(grange, 2);
 407                 break;
 408         default:
 409                 return SR_ERR_NA;
 410         }
 411
 412         return SR_OK;
 413 }
 414
 415 static int dev_open(struct sr_dev_inst *sdi)
 416 {
 417         struct dev_context *devc;
 418
 419         devc = sdi->priv;
 420
 421         if (p_ols_open(devc) != SR_OK) {
 422                 return SR_ERR;
 423         } else {
 424                 sdi->status = SR_ST_ACTIVE;
 425                 return SR_OK;
 426         }
 427 }
 428
 429 static int dev_close(struct sr_dev_inst *sdi)
 430 {
 431         int ret;
 432         struct dev_context *devc;
 433
 434         ret = SR_OK;
 435         devc = sdi->priv;
 436
 437         if (sdi->status == SR_ST_ACTIVE) {
 438                 sr_dbg("Status ACTIVE, closing device.");
 439                 ret = p_ols_close(devc);
 440         } else {
 441                 sr_spew("Status not ACTIVE, nothing to do.");
 442         }
 443
 444         sdi->status = SR_ST_INACTIVE;
 445
 446         return ret;
 447 }
 448
 449 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 450 {
 451         struct dev_context *devc;
 452         uint8_t cmd, arg[4];
 453
 454         devc = sdi->priv;
 455
 456         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 457         arg[0] = devc->trigger_mask[stage] & 0xff;
 458         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 459         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 460         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 461         if (write_longcommand(devc, cmd, arg) != SR_OK)
 462                 return SR_ERR;
 463
 464         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 465         arg[0] = devc->trigger_value[stage] & 0xff;
 466         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 467         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 468         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 469         if (write_longcommand(devc, cmd, arg) != SR_OK)
 470                 return SR_ERR;
 471
 472         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 473         arg[0] = arg[1] = arg[3] = 0x00;
 474         arg[2] = stage;
 475         if (stage == devc->num_stages)
 476                 /* Last stage, fire when this one matches. */
 477                 arg[3] |= TRIGGER_START;
 478         if (write_longcommand(devc, cmd, arg) != SR_OK)
 479                 return SR_ERR;
 480
 481         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 482         arg[0] = devc->trigger_edge[stage] & 0xff;
 483         arg[1] = (devc->trigger_edge[stage] >> 8) & 0xff;
 484         arg[2] = (devc->trigger_edge[stage] >> 16) & 0xff;
 485         arg[3] = (devc->trigger_edge[stage] >> 24) & 0xff;
 486         if (write_longcommand(devc, cmd, arg) != SR_OK)
 487                 return SR_ERR;
 488
 489         return SR_OK;
 490 }
 491
 492 static int disable_trigger(const struct sr_dev_inst *sdi, int stage)
 493 {
 494         struct dev_context *devc;
 495         uint8_t cmd, arg[4];
 496
 497         devc = sdi->priv;
 498
 499         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 500         arg[0] = arg[1] = arg[2] = arg[3] = 0x00;
 501         if (write_longcommand(devc, cmd, arg) != SR_OK)
 502                 return SR_ERR;
 503
 504         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 505         if (write_longcommand(devc, cmd, arg) != SR_OK)
 506                 return SR_ERR;
 507
 508         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 509         arg[2] = 0x03;
 510         if (write_longcommand(devc, cmd, arg) != SR_OK)
 511                 return SR_ERR;
 512
 513         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 514         arg[2] = 0x00;
 515         if (write_longcommand(devc, cmd, arg) != SR_OK)
 516                 return SR_ERR;
 517
 518         return SR_OK;
 519 }
 520
 521 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 522 {
 523         struct dev_context *devc;
 524         uint32_t samplecount, readcount, delaycount;
 525         uint8_t pols_changrp_mask, arg[4];
 526         uint16_t flag_tmp;
 527         int num_pols_changrp, samplespercount;
 528         int ret, i;
 529
 530         if (sdi->status != SR_ST_ACTIVE)
 531                 return SR_ERR_DEV_CLOSED;
 532
 533         devc = sdi->priv;
 534
 535         pols_channel_mask(sdi);
 536
 537         /*
 538          * Enable/disable channel groups in the flag register according to the
 539          * channel mask. Calculate this here, because num_pols_changrp is
 540          * needed to limit readcount.
 541          */
 542         pols_changrp_mask = 0;
 543         num_pols_changrp = 0;
 544         for (i = 0; i < 4; i++) {
 545                 if (devc->channel_mask & (0xff << (i * 8))) {
 546                         pols_changrp_mask |= (1 << i);
 547                         num_pols_changrp++;
 548                 }
 549         }
 550         /* 3 channel groups takes as many bytes as 4 channel groups */
 551         if (num_pols_changrp == 3)
 552                 num_pols_changrp = 4;
 553         /* maximum number of samples (or RLE counts) the buffer memory can hold */
 554         devc->max_samples = devc->max_samplebytes / num_pols_changrp;
 555
 556         /*
 557          * Limit readcount to prevent reading past the end of the hardware
 558          * buffer.
 559          */
 560         sr_dbg("max_samples = %d", devc->max_samples);
 561         sr_dbg("limit_samples = %" PRIu64, devc->limit_samples);
 562         samplecount = MIN(devc->max_samples, devc->limit_samples);
 563         sr_dbg("Samplecount = %d", samplecount);
 564
 565         /* In demux mode the OLS is processing two samples per clock */
 566         if (devc->flag_reg & FLAG_DEMUX) {
 567                 samplespercount = 8;
 568         }
 569         else {
 570                 samplespercount = 4;
 571         }
 572
 573         readcount = samplecount / samplespercount;
 574
 575         /* Rather read too many samples than too few. */
 576         if (samplecount % samplespercount != 0)
 577                 readcount++;
 578
 579         /* Basic triggers. */
 580         if (pols_convert_trigger(sdi) != SR_OK) {
 581                 sr_err("Failed to configure channels.");
 582                 return SR_ERR;
 583         }
 584
 585         if (devc->num_stages > 0) {
 586                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 587                 devc->trigger_at = (readcount - delaycount) * samplespercount - devc->num_stages;
 588                 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 589                         if (i <= devc->num_stages) {
 590                                 sr_dbg("Setting p-ols stage %d trigger.", i);
 591                                 if ((ret = set_trigger(sdi, i)) != SR_OK)
 592                                         return ret;
 593                         }
 594                         else {
 595                                 sr_dbg("Disabling p-ols stage %d trigger.", i);
 596                                 if ((ret = disable_trigger(sdi, i)) != SR_OK)
 597                                         return ret;
 598                         }
 599                 }
 600         } else {
 601                 /* No triggers configured, force trigger on first stage. */
 602                 sr_dbg("Forcing trigger at stage 0.");
 603                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 604                         return ret;
 605                 delaycount = readcount;
 606         }
 607
 608         /* Samplerate. */
 609         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 610                         devc->cur_samplerate, devc->cur_samplerate_divider);
 611         arg[0] = devc->cur_samplerate_divider & 0xff;
 612         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 613         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 614         arg[3] = 0x00;
 615         if (write_longcommand(devc, CMD_SET_DIVIDER, arg) != SR_OK)
 616                 return SR_ERR;
 617
 618         /* Send extended sample limit and pre/post-trigger capture ratio. */
 619         arg[0] = ((readcount - 1) & 0xff);
 620         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 621         arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 622         arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 623         if (write_longcommand(devc, CMD_CAPTURE_DELAY, arg) != SR_OK)
 624                 return SR_ERR;
 625         arg[0] = ((delaycount - 1) & 0xff);
 626         arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 627         arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 628         arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 629         if (write_longcommand(devc, CMD_CAPTURE_COUNT, arg) != SR_OK)
 630                 return SR_ERR;
 631
 632         /* Flag register. */
 633         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 634                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 635                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 636                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 637                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 638                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 639
 640         /*
 641         * Enable/disable OLS channel groups in the flag register according
 642         * to the channel mask. 1 means "disable channel".
 643         */
 644         devc->flag_reg &= ~0x3c;
 645         devc->flag_reg |= ~(pols_changrp_mask << 2) & 0x3c;
 646         sr_dbg("flag_reg = %x", devc->flag_reg);
 647
 648         /*
 649         * In demux mode the OLS is processing two 8-bit or 16-bit samples
 650         * in parallel and for this to work the lower two bits of the four
 651         * "channel_disable" bits must be replicated to the upper two bits.
 652         */
 653         flag_tmp = devc->flag_reg;
 654         if (devc->flag_reg & FLAG_DEMUX) {
 655                 flag_tmp &= ~0x30;
 656                 flag_tmp |= ~(pols_changrp_mask << 4) & 0x30;
 657         }
 658         arg[0] = flag_tmp & 0xff;
 659         arg[1] = flag_tmp >> 8;
 660         arg[2] = arg[3] = 0x00;
 661         if (write_longcommand(devc, CMD_SET_FLAGS, arg) != SR_OK)
 662                 return SR_ERR;
 663
 664         /* Start acquisition on the device. */
 665         if (write_shortcommand(devc, CMD_RUN) != SR_OK)
 666                 return SR_ERR;
 667
 668         /* Reset all operational states. */
 669         devc->rle_count = devc->num_transfers = 0;
 670         devc->num_samples = devc->num_bytes = 0;
 671         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 672         memset(devc->sample, 0, 4);
 673
 674         std_session_send_df_header(sdi, LOG_PREFIX);
 675
 676         /* Hook up a dummy handler to receive data from the device. */
 677         sr_session_source_add(sdi->session, -1, 0, 10, p_ols_receive_data,
 678                                 (struct sr_dev_inst *)sdi);
 679
 680         return SR_OK;
 681 }
 682
 683 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 684 {
 685         struct dev_context *devc;
 686
 687         devc = sdi->priv;
 688
 689         sr_dbg("Stopping acquisition.");
 690         write_shortcommand(devc, CMD_RESET);
 691         write_shortcommand(devc, CMD_RESET);
 692         write_shortcommand(devc, CMD_RESET);
 693         write_shortcommand(devc, CMD_RESET);
 694         write_shortcommand(devc, CMD_RESET);
 695
 696         sr_session_source_remove(sdi->session, -1);
 697
 698         std_session_send_df_end(sdi, LOG_PREFIX);
 699
 700         return SR_OK;
 701 }
 702
 703 SR_PRIV struct sr_dev_driver p_ols_driver_info = {
 704         .name = "p-ols",
 705         .longname = "Pipistrello OLS",
 706         .api_version = 1,
 707         .init = std_init,
 708         .cleanup = std_cleanup,
 709         .scan = scan,
 710         .dev_list = std_dev_list,
 711         .dev_clear = dev_clear,
 712         .config_get = config_get,
 713         .config_set = config_set,
 714         .config_list = config_list,
 715         .dev_open = dev_open,
 716         .dev_close = dev_close,
 717         .dev_acquisition_start = dev_acquisition_start,
 718         .dev_acquisition_stop = dev_acquisition_stop,
 719         .context = NULL,
 720 };
 721 SR_REGISTER_DEV_DRIVER(p_ols_driver_info);