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 SR_PRIV struct sr_dev_driver p_ols_driver_info;
  79
  80 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  81 {
  82         struct sr_dev_inst *sdi;
  83         struct drv_context *drvc;
  84         struct dev_context *devc;
  85         GSList *devices;
  86         int ret, i;
  87         char buf[70];
  88         int bytes_read;
  89
  90         (void)options;
  91
  92         drvc = di->context;
  93
  94         devices = NULL;
  95
  96         /* Allocate memory for our private device context. */
  97         devc = g_malloc0(sizeof(struct dev_context));
  98
  99         /* Device-specific settings */
 100         devc->max_samplebytes = devc->max_samplerate = devc->protocol_version = 0;
 101
 102         /* Acquisition settings */
 103         devc->limit_samples = devc->capture_ratio = 0;
 104         devc->trigger_at = -1;
 105         devc->channel_mask = 0xffffffff;
 106         devc->flag_reg = 0;
 107
 108         /* Allocate memory for the incoming ftdi data. */
 109         devc->ftdi_buf = g_malloc0(FTDI_BUF_SIZE);
 110
 111         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
 112         if (!(devc->ftdic = ftdi_new())) {
 113                 sr_err("Failed to initialize libftdi.");
 114                 goto err_free_ftdi_buf;;
 115         }
 116
 117         /* Try to open the FTDI device */
 118         if (p_ols_open(devc) != SR_OK) {
 119                 goto err_free_ftdic;
 120         }
 121
 122         /* The discovery procedure is like this: first send the Reset
 123          * command (0x00) 5 times, since the device could be anywhere
 124          * in a 5-byte command. Then send the ID command (0x02).
 125          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 126          * have a match.
 127          */
 128
 129         ret = SR_OK;
 130         for (i = 0; i < 5; i++) {
 131                 if ((ret = write_shortcommand(devc, CMD_RESET)) != SR_OK) {
 132                         break;
 133                 }
 134         }
 135         if (ret != SR_OK) {
 136                 sr_err("Could not reset device. Quitting.");
 137                 goto err_close_ftdic;
 138         }
 139         write_shortcommand(devc, CMD_ID);
 140
 141         /* Read the response data. */
 142         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 4);
 143         if (bytes_read < 0) {
 144                 sr_err("Failed to read FTDI data (%d): %s.",
 145                        bytes_read, ftdi_get_error_string(devc->ftdic));
 146                 goto err_close_ftdic;
 147         }
 148         if (bytes_read == 0) {
 149                 goto err_close_ftdic;
 150         }
 151
 152         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 153                 goto err_close_ftdic;
 154
 155         /* Definitely using the OLS protocol, check if it supports
 156          * the metadata command.
 157          */
 158         write_shortcommand(devc, CMD_METADATA);
 159
 160         /* Read the metadata. */
 161         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 64);
 162         if (bytes_read < 0) {
 163                 sr_err("Failed to read FTDI data (%d): %s.",
 164                        bytes_read, ftdi_get_error_string(devc->ftdic));
 165                 goto err_close_ftdic;
 166         }
 167         if (bytes_read == 0) {
 168                 goto err_close_ftdic;
 169         }
 170
 171         /* Close device. We'll reopen it again when we need it. */
 172         p_ols_close(devc);
 173
 174         /* Parse the metadata. */
 175         sdi = p_ols_get_metadata((uint8_t *)buf, bytes_read, devc);
 176
 177         /* Configure samplerate and divider. */
 178         if (p_ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 179                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 180                                 DEFAULT_SAMPLERATE);
 181
 182         drvc->instances = g_slist_append(drvc->instances, sdi);
 183         devices = g_slist_append(devices, sdi);
 184
 185         return devices;
 186
 187 err_close_ftdic:
 188         p_ols_close(devc);
 189 err_free_ftdic:
 190         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
 191 err_free_ftdi_buf:
 192         g_free(devc->ftdi_buf);
 193         g_free(devc);
 194
 195         return NULL;
 196 }
 197
 198 static void clear_helper(void *priv)
 199 {
 200         struct dev_context *devc;
 201
 202         devc = priv;
 203
 204         ftdi_free(devc->ftdic);
 205         g_free(devc->ftdi_buf);
 206 }
 207
 208 static int dev_clear(const struct sr_dev_driver *di)
 209 {
 210         return std_dev_clear(di, clear_helper);
 211 }
 212
 213 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 214                 const struct sr_channel_group *cg)
 215 {
 216         struct dev_context *devc;
 217
 218         (void)cg;
 219
 220         if (!sdi)
 221                 return SR_ERR_ARG;
 222
 223         devc = sdi->priv;
 224         switch (key) {
 225         case SR_CONF_SAMPLERATE:
 226                 *data = g_variant_new_uint64(devc->cur_samplerate);
 227                 break;
 228         case SR_CONF_CAPTURE_RATIO:
 229                 *data = g_variant_new_uint64(devc->capture_ratio);
 230                 break;
 231         case SR_CONF_LIMIT_SAMPLES:
 232                 *data = g_variant_new_uint64(devc->limit_samples);
 233                 break;
 234         case SR_CONF_PATTERN_MODE:
 235                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 236                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 237                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 238                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 239                 else
 240                         *data = g_variant_new_string(STR_PATTERN_NONE);
 241                 break;
 242         case SR_CONF_RLE:
 243                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 244                 break;
 245         case SR_CONF_EXTERNAL_CLOCK:
 246                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
 247                 break;
 248         default:
 249                 return SR_ERR_NA;
 250         }
 251
 252         return SR_OK;
 253 }
 254
 255 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 256                 const struct sr_channel_group *cg)
 257 {
 258         struct dev_context *devc;
 259         uint16_t flag;
 260         uint64_t tmp_u64;
 261         int ret;
 262         const char *stropt;
 263
 264         (void)cg;
 265
 266         if (sdi->status != SR_ST_ACTIVE)
 267                 return SR_ERR_DEV_CLOSED;
 268
 269         devc = sdi->priv;
 270
 271         switch (key) {
 272         case SR_CONF_SAMPLERATE:
 273                 tmp_u64 = g_variant_get_uint64(data);
 274                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 275                         return SR_ERR_SAMPLERATE;
 276                 ret = p_ols_set_samplerate(sdi, g_variant_get_uint64(data));
 277                 break;
 278         case SR_CONF_LIMIT_SAMPLES:
 279                 tmp_u64 = g_variant_get_uint64(data);
 280                 if (tmp_u64 < MIN_NUM_SAMPLES)
 281                         return SR_ERR;
 282                 devc->limit_samples = tmp_u64;
 283                 ret = SR_OK;
 284                 break;
 285         case SR_CONF_CAPTURE_RATIO:
 286                 devc->capture_ratio = g_variant_get_uint64(data);
 287                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100)
 288                         ret = SR_ERR;
 289                 else
 290                         ret = SR_OK;
 291                 break;
 292         case SR_CONF_EXTERNAL_CLOCK:
 293                 if (g_variant_get_boolean(data)) {
 294                         sr_info("Enabling external clock.");
 295                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 296                 } else {
 297                         sr_info("Disabled external clock.");
 298                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 299                 }
 300                 ret = SR_OK;
 301                 break;
 302         case SR_CONF_PATTERN_MODE:
 303                 stropt = g_variant_get_string(data, NULL);
 304                 ret = SR_OK;
 305                 flag = 0xffff;
 306                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 307                         sr_info("Disabling test modes.");
 308                         flag = 0x0000;
 309                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 310                         sr_info("Enabling internal test mode.");
 311                         flag = FLAG_INTERNAL_TEST_MODE;
 312                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 313                         sr_info("Enabling external test mode.");
 314                         flag = FLAG_EXTERNAL_TEST_MODE;
 315                 } else {
 316                         ret = SR_ERR;
 317                 }
 318                 if (flag != 0xffff) {
 319                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 320                         devc->flag_reg |= flag;
 321                 }
 322                 break;
 323         case SR_CONF_SWAP:
 324                 if (g_variant_get_boolean(data)) {
 325                         sr_info("Enabling channel swapping.");
 326                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 327                 } else {
 328                         sr_info("Disabling channel swapping.");
 329                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 330                 }
 331                 ret = SR_OK;
 332                 break;
 333
 334         case SR_CONF_RLE:
 335                 if (g_variant_get_boolean(data)) {
 336                         sr_info("Enabling RLE.");
 337                         devc->flag_reg |= FLAG_RLE;
 338                 } else {
 339                         sr_info("Disabling RLE.");
 340                         devc->flag_reg &= ~FLAG_RLE;
 341                 }
 342                 ret = SR_OK;
 343                 break;
 344         default:
 345                 ret = SR_ERR_NA;
 346         }
 347
 348         return ret;
 349 }
 350
 351 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 352                 const struct sr_channel_group *cg)
 353 {
 354         struct dev_context *devc;
 355         GVariant *gvar, *grange[2];
 356         GVariantBuilder gvb;
 357         int num_pols_changrp, i;
 358
 359         (void)cg;
 360
 361         switch (key) {
 362         case SR_CONF_DEVICE_OPTIONS:
 363                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 364                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 365                 break;
 366         case SR_CONF_SAMPLERATE:
 367                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 368                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 369                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 370                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 371                 *data = g_variant_builder_end(&gvb);
 372                 break;
 373         case SR_CONF_TRIGGER_MATCH:
 374                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 375                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 376                                 sizeof(int32_t));
 377                 break;
 378         case SR_CONF_PATTERN_MODE:
 379                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 380                 break;
 381         case SR_CONF_LIMIT_SAMPLES:
 382                 if (!sdi)
 383                         return SR_ERR_ARG;
 384                 devc = sdi->priv;
 385                 if (devc->flag_reg & FLAG_RLE)
 386                         return SR_ERR_NA;
 387                 if (devc->max_samplebytes == 0)
 388                         /* Device didn't specify sample memory size in metadata. */
 389                         return SR_ERR_NA;
 390                 /*
 391                  * Channel groups are turned off if no channels in that group are
 392                  * enabled, making more room for samples for the enabled group.
 393                 */
 394                 pols_channel_mask(sdi);
 395                 num_pols_changrp = 0;
 396                 for (i = 0; i < 4; i++) {
 397                         if (devc->channel_mask & (0xff << (i * 8)))
 398                                 num_pols_changrp++;
 399                 }
 400                 /* 3 channel groups takes as many bytes as 4 channel groups */
 401                 if (num_pols_changrp == 3)
 402                         num_pols_changrp = 4;
 403                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 404                 if (num_pols_changrp)
 405                         grange[1] = g_variant_new_uint64(devc->max_samplebytes / num_pols_changrp);
 406                 else
 407                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 408                 *data = g_variant_new_tuple(grange, 2);
 409                 break;
 410         default:
 411                 return SR_ERR_NA;
 412         }
 413
 414         return SR_OK;
 415 }
 416
 417 static int dev_open(struct sr_dev_inst *sdi)
 418 {
 419         struct dev_context *devc;
 420
 421         devc = sdi->priv;
 422
 423         if (p_ols_open(devc) != SR_OK) {
 424                 return SR_ERR;
 425         } else {
 426                 sdi->status = SR_ST_ACTIVE;
 427                 return SR_OK;
 428         }
 429 }
 430
 431 static int dev_close(struct sr_dev_inst *sdi)
 432 {
 433         int ret;
 434         struct dev_context *devc;
 435
 436         ret = SR_OK;
 437         devc = sdi->priv;
 438
 439         if (sdi->status == SR_ST_ACTIVE) {
 440                 sr_dbg("Status ACTIVE, closing device.");
 441                 ret = p_ols_close(devc);
 442         } else {
 443                 sr_spew("Status not ACTIVE, nothing to do.");
 444         }
 445
 446         sdi->status = SR_ST_INACTIVE;
 447
 448         return ret;
 449 }
 450
 451 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 452 {
 453         struct dev_context *devc;
 454         uint8_t cmd, arg[4];
 455
 456         devc = sdi->priv;
 457
 458         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 459         arg[0] = devc->trigger_mask[stage] & 0xff;
 460         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 461         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 462         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 463         if (write_longcommand(devc, cmd, arg) != SR_OK)
 464                 return SR_ERR;
 465
 466         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 467         arg[0] = devc->trigger_value[stage] & 0xff;
 468         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 469         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 470         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 471         if (write_longcommand(devc, cmd, arg) != SR_OK)
 472                 return SR_ERR;
 473
 474         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 475         arg[0] = arg[1] = arg[3] = 0x00;
 476         arg[2] = stage;
 477         if (stage == devc->num_stages)
 478                 /* Last stage, fire when this one matches. */
 479                 arg[3] |= TRIGGER_START;
 480         if (write_longcommand(devc, cmd, arg) != SR_OK)
 481                 return SR_ERR;
 482
 483         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 484         arg[0] = devc->trigger_edge[stage] & 0xff;
 485         arg[1] = (devc->trigger_edge[stage] >> 8) & 0xff;
 486         arg[2] = (devc->trigger_edge[stage] >> 16) & 0xff;
 487         arg[3] = (devc->trigger_edge[stage] >> 24) & 0xff;
 488         if (write_longcommand(devc, cmd, arg) != SR_OK)
 489                 return SR_ERR;
 490
 491         return SR_OK;
 492 }
 493
 494 static int disable_trigger(const struct sr_dev_inst *sdi, int stage)
 495 {
 496         struct dev_context *devc;
 497         uint8_t cmd, arg[4];
 498
 499         devc = sdi->priv;
 500
 501         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 502         arg[0] = arg[1] = arg[2] = arg[3] = 0x00;
 503         if (write_longcommand(devc, cmd, arg) != SR_OK)
 504                 return SR_ERR;
 505
 506         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 507         if (write_longcommand(devc, cmd, arg) != SR_OK)
 508                 return SR_ERR;
 509
 510         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 511         arg[2] = 0x03;
 512         if (write_longcommand(devc, cmd, arg) != SR_OK)
 513                 return SR_ERR;
 514
 515         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 516         arg[2] = 0x00;
 517         if (write_longcommand(devc, cmd, arg) != SR_OK)
 518                 return SR_ERR;
 519
 520         return SR_OK;
 521 }
 522
 523 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 524 {
 525         struct dev_context *devc;
 526         uint32_t samplecount, readcount, delaycount;
 527         uint8_t pols_changrp_mask, arg[4];
 528         uint16_t flag_tmp;
 529         int num_pols_changrp, samplespercount;
 530         int ret, i;
 531
 532         if (sdi->status != SR_ST_ACTIVE)
 533                 return SR_ERR_DEV_CLOSED;
 534
 535         devc = sdi->priv;
 536
 537         pols_channel_mask(sdi);
 538
 539         /*
 540          * Enable/disable channel groups in the flag register according to the
 541          * channel mask. Calculate this here, because num_pols_changrp is
 542          * needed to limit readcount.
 543          */
 544         pols_changrp_mask = 0;
 545         num_pols_changrp = 0;
 546         for (i = 0; i < 4; i++) {
 547                 if (devc->channel_mask & (0xff << (i * 8))) {
 548                         pols_changrp_mask |= (1 << i);
 549                         num_pols_changrp++;
 550                 }
 551         }
 552         /* 3 channel groups takes as many bytes as 4 channel groups */
 553         if (num_pols_changrp == 3)
 554                 num_pols_changrp = 4;
 555         /* maximum number of samples (or RLE counts) the buffer memory can hold */
 556         devc->max_samples = devc->max_samplebytes / num_pols_changrp;
 557
 558         /*
 559          * Limit readcount to prevent reading past the end of the hardware
 560          * buffer.
 561          */
 562         sr_dbg("max_samples = %d", devc->max_samples);
 563         sr_dbg("limit_samples = %" PRIu64, devc->limit_samples);
 564         samplecount = MIN(devc->max_samples, devc->limit_samples);
 565         sr_dbg("Samplecount = %d", samplecount);
 566
 567         /* In demux mode the OLS is processing two samples per clock */
 568         if (devc->flag_reg & FLAG_DEMUX) {
 569                 samplespercount = 8;
 570         }
 571         else {
 572                 samplespercount = 4;
 573         }
 574
 575         readcount = samplecount / samplespercount;
 576
 577         /* Rather read too many samples than too few. */
 578         if (samplecount % samplespercount != 0)
 579                 readcount++;
 580
 581         /* Basic triggers. */
 582         if (pols_convert_trigger(sdi) != SR_OK) {
 583                 sr_err("Failed to configure channels.");
 584                 return SR_ERR;
 585         }
 586
 587         if (devc->num_stages > 0) {
 588                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 589                 devc->trigger_at = (readcount - delaycount) * samplespercount - devc->num_stages;
 590                 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 591                         if (i <= devc->num_stages) {
 592                                 sr_dbg("Setting p-ols stage %d trigger.", i);
 593                                 if ((ret = set_trigger(sdi, i)) != SR_OK)
 594                                         return ret;
 595                         }
 596                         else {
 597                                 sr_dbg("Disabling p-ols stage %d trigger.", i);
 598                                 if ((ret = disable_trigger(sdi, i)) != SR_OK)
 599                                         return ret;
 600                         }
 601                 }
 602         } else {
 603                 /* No triggers configured, force trigger on first stage. */
 604                 sr_dbg("Forcing trigger at stage 0.");
 605                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 606                         return ret;
 607                 delaycount = readcount;
 608         }
 609
 610         /* Samplerate. */
 611         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 612                         devc->cur_samplerate, devc->cur_samplerate_divider);
 613         arg[0] = devc->cur_samplerate_divider & 0xff;
 614         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 615         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 616         arg[3] = 0x00;
 617         if (write_longcommand(devc, CMD_SET_DIVIDER, arg) != SR_OK)
 618                 return SR_ERR;
 619
 620         /* Send extended sample limit and pre/post-trigger capture ratio. */
 621         arg[0] = ((readcount - 1) & 0xff);
 622         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 623         arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 624         arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 625         if (write_longcommand(devc, CMD_CAPTURE_DELAY, arg) != SR_OK)
 626                 return SR_ERR;
 627         arg[0] = ((delaycount - 1) & 0xff);
 628         arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 629         arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 630         arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 631         if (write_longcommand(devc, CMD_CAPTURE_COUNT, arg) != SR_OK)
 632                 return SR_ERR;
 633
 634         /* Flag register. */
 635         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 636                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 637                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 638                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 639                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 640                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 641
 642         /*
 643         * Enable/disable OLS channel groups in the flag register according
 644         * to the channel mask. 1 means "disable channel".
 645         */
 646         devc->flag_reg &= ~0x3c;
 647         devc->flag_reg |= ~(pols_changrp_mask << 2) & 0x3c;
 648         sr_dbg("flag_reg = %x", devc->flag_reg);
 649
 650         /*
 651         * In demux mode the OLS is processing two 8-bit or 16-bit samples
 652         * in parallel and for this to work the lower two bits of the four
 653         * "channel_disable" bits must be replicated to the upper two bits.
 654         */
 655         flag_tmp = devc->flag_reg;
 656         if (devc->flag_reg & FLAG_DEMUX) {
 657                 flag_tmp &= ~0x30;
 658                 flag_tmp |= ~(pols_changrp_mask << 4) & 0x30;
 659         }
 660         arg[0] = flag_tmp & 0xff;
 661         arg[1] = flag_tmp >> 8;
 662         arg[2] = arg[3] = 0x00;
 663         if (write_longcommand(devc, CMD_SET_FLAGS, arg) != SR_OK)
 664                 return SR_ERR;
 665
 666         /* Start acquisition on the device. */
 667         if (write_shortcommand(devc, CMD_RUN) != SR_OK)
 668                 return SR_ERR;
 669
 670         /* Reset all operational states. */
 671         devc->rle_count = devc->num_transfers = 0;
 672         devc->num_samples = devc->num_bytes = 0;
 673         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 674         memset(devc->sample, 0, 4);
 675
 676         std_session_send_df_header(sdi, LOG_PREFIX);
 677
 678         /* Hook up a dummy handler to receive data from the device. */
 679         sr_session_source_add(sdi->session, -1, 0, 10, p_ols_receive_data,
 680                                 (struct sr_dev_inst *)sdi);
 681
 682         return SR_OK;
 683 }
 684
 685 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 686 {
 687         struct dev_context *devc;
 688
 689         devc = sdi->priv;
 690
 691         sr_dbg("Stopping acquisition.");
 692         write_shortcommand(devc, CMD_RESET);
 693         write_shortcommand(devc, CMD_RESET);
 694         write_shortcommand(devc, CMD_RESET);
 695         write_shortcommand(devc, CMD_RESET);
 696         write_shortcommand(devc, CMD_RESET);
 697
 698         sr_session_source_remove(sdi->session, -1);
 699
 700         std_session_send_df_end(sdi, LOG_PREFIX);
 701
 702         return SR_OK;
 703 }
 704
 705 SR_PRIV struct sr_dev_driver p_ols_driver_info = {
 706         .name = "p-ols",
 707         .longname = "Pipistrello OLS",
 708         .api_version = 1,
 709         .init = std_init,
 710         .cleanup = std_cleanup,
 711         .scan = scan,
 712         .dev_list = std_dev_list,
 713         .dev_clear = dev_clear,
 714         .config_get = config_get,
 715         .config_set = config_set,
 716         .config_list = config_list,
 717         .dev_open = dev_open,
 718         .dev_close = dev_close,
 719         .dev_acquisition_start = dev_acquisition_start,
 720         .dev_acquisition_stop = dev_acquisition_stop,
 721         .context = NULL,
 722 };