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 devopts[] = {
  23         SR_CONF_LOGIC_ANALYZER,
  24         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  25         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  26         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  27         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  28         SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  29         SR_CONF_EXTERNAL_CLOCK | SR_CONF_GET | SR_CONF_SET,
  30         SR_CONF_SWAP | SR_CONF_SET,
  31         SR_CONF_RLE | SR_CONF_GET | SR_CONF_SET,
  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
 189         /* Configure samplerate and divider. */
 190         if (p_ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 191                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 192                                 DEFAULT_SAMPLERATE);
 193
 194         drvc->instances = g_slist_append(drvc->instances, sdi);
 195         devices = g_slist_append(devices, sdi);
 196
 197         return devices;
 198
 199 err_close_ftdic:
 200         p_ols_close(devc);
 201 err_free_ftdic:
 202         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
 203 err_free_ftdi_buf:
 204         g_free(devc->ftdi_buf);
 205 err_free_devc:
 206         g_free(devc);
 207 err_free_nothing:
 208
 209         return NULL;
 210 }
 211
 212 static GSList *dev_list(void)
 213 {
 214         return ((struct drv_context *)(di->priv))->instances;
 215 }
 216
 217 static void clear_helper(void *priv)
 218 {
 219         struct dev_context *devc;
 220
 221         devc = priv;
 222
 223         ftdi_free(devc->ftdic);
 224         g_free(devc->ftdi_buf);
 225 }
 226
 227 static int dev_clear(void)
 228 {
 229         return std_dev_clear(di, clear_helper);
 230 }
 231
 232 static int cleanup(void)
 233 {
 234         return dev_clear();
 235 }
 236
 237
 238 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 239                 const struct sr_channel_group *cg)
 240 {
 241         struct dev_context *devc;
 242
 243         (void)cg;
 244
 245         if (!sdi)
 246                 return SR_ERR_ARG;
 247
 248         devc = sdi->priv;
 249         switch (key) {
 250         case SR_CONF_SAMPLERATE:
 251                 *data = g_variant_new_uint64(devc->cur_samplerate);
 252                 break;
 253         case SR_CONF_CAPTURE_RATIO:
 254                 *data = g_variant_new_uint64(devc->capture_ratio);
 255                 break;
 256         case SR_CONF_LIMIT_SAMPLES:
 257                 *data = g_variant_new_uint64(devc->limit_samples);
 258                 break;
 259         case SR_CONF_PATTERN_MODE:
 260                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 261                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 262                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 263                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 264                 else
 265                         *data = g_variant_new_string(STR_PATTERN_NONE);
 266                 break;
 267         case SR_CONF_RLE:
 268                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 269                 break;
 270         case SR_CONF_EXTERNAL_CLOCK:
 271                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
 272                 break;
 273         default:
 274                 return SR_ERR_NA;
 275         }
 276
 277         return SR_OK;
 278 }
 279
 280 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 281                 const struct sr_channel_group *cg)
 282 {
 283         struct dev_context *devc;
 284         uint16_t flag;
 285         uint64_t tmp_u64;
 286         int ret;
 287         const char *stropt;
 288
 289         (void)cg;
 290
 291         if (sdi->status != SR_ST_ACTIVE)
 292                 return SR_ERR_DEV_CLOSED;
 293
 294         devc = sdi->priv;
 295
 296         switch (key) {
 297         case SR_CONF_SAMPLERATE:
 298                 tmp_u64 = g_variant_get_uint64(data);
 299                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 300                         return SR_ERR_SAMPLERATE;
 301                 ret = p_ols_set_samplerate(sdi, g_variant_get_uint64(data));
 302                 break;
 303         case SR_CONF_LIMIT_SAMPLES:
 304                 tmp_u64 = g_variant_get_uint64(data);
 305                 if (tmp_u64 < MIN_NUM_SAMPLES)
 306                         return SR_ERR;
 307                 devc->limit_samples = tmp_u64;
 308                 ret = SR_OK;
 309                 break;
 310         case SR_CONF_CAPTURE_RATIO:
 311                 devc->capture_ratio = g_variant_get_uint64(data);
 312                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 313                         devc->capture_ratio = 0;
 314                         ret = SR_ERR;
 315                 } else
 316                         ret = SR_OK;
 317                 break;
 318         case SR_CONF_EXTERNAL_CLOCK:
 319                 if (g_variant_get_boolean(data)) {
 320                         sr_info("Enabling external clock.");
 321                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 322                 } else {
 323                         sr_info("Disabled external clock.");
 324                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 325                 }
 326                 ret = SR_OK;
 327                 break;
 328         case SR_CONF_PATTERN_MODE:
 329                 stropt = g_variant_get_string(data, NULL);
 330                 ret = SR_OK;
 331                 flag = 0xffff;
 332                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 333                         sr_info("Disabling test modes.");
 334                         flag = 0x0000;
 335                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 336                         sr_info("Enabling internal test mode.");
 337                         flag = FLAG_INTERNAL_TEST_MODE;
 338                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 339                         sr_info("Enabling external test mode.");
 340                         flag = FLAG_EXTERNAL_TEST_MODE;
 341                 } else {
 342                         ret = SR_ERR;
 343                 }
 344                 if (flag != 0xffff) {
 345                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 346                         devc->flag_reg |= flag;
 347                 }
 348                 break;
 349         case SR_CONF_SWAP:
 350                 if (g_variant_get_boolean(data)) {
 351                         sr_info("Enabling channel swapping.");
 352                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 353                 } else {
 354                         sr_info("Disabling channel swapping.");
 355                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 356                 }
 357                 ret = SR_OK;
 358                 break;
 359
 360         case SR_CONF_RLE:
 361                 if (g_variant_get_boolean(data)) {
 362                         sr_info("Enabling RLE.");
 363                         devc->flag_reg |= FLAG_RLE;
 364                 } else {
 365                         sr_info("Disabling RLE.");
 366                         devc->flag_reg &= ~FLAG_RLE;
 367                 }
 368                 ret = SR_OK;
 369                 break;
 370         default:
 371                 ret = SR_ERR_NA;
 372         }
 373
 374         return ret;
 375 }
 376
 377 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 378                 const struct sr_channel_group *cg)
 379 {
 380         struct dev_context *devc;
 381         GVariant *gvar, *grange[2];
 382         GVariantBuilder gvb;
 383         int num_pols_changrp, i;
 384
 385         (void)cg;
 386
 387         switch (key) {
 388         case SR_CONF_DEVICE_OPTIONS:
 389                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 390                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 391                 break;
 392         case SR_CONF_SAMPLERATE:
 393                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 394                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 395                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 396                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 397                 *data = g_variant_builder_end(&gvb);
 398                 break;
 399         case SR_CONF_TRIGGER_MATCH:
 400                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 401                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 402                                 sizeof(int32_t));
 403                 break;
 404         case SR_CONF_PATTERN_MODE:
 405                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 406                 break;
 407         case SR_CONF_LIMIT_SAMPLES:
 408                 if (!sdi)
 409                         return SR_ERR_ARG;
 410                 devc = sdi->priv;
 411                 if (devc->flag_reg & FLAG_RLE)
 412                         return SR_ERR_NA;
 413                 if (devc->max_samplebytes == 0)
 414                         /* Device didn't specify sample memory size in metadata. */
 415                         return SR_ERR_NA;
 416                 /*
 417                  * Channel groups are turned off if no channels in that group are
 418                  * enabled, making more room for samples for the enabled group.
 419                 */
 420                 pols_channel_mask(sdi);
 421                 num_pols_changrp = 0;
 422                 for (i = 0; i < 4; i++) {
 423                         if (devc->channel_mask & (0xff << (i * 8)))
 424                                 num_pols_changrp++;
 425                 }
 426                 /* 3 channel groups takes as many bytes as 4 channel groups */
 427                 if (num_pols_changrp == 3)
 428                         num_pols_changrp = 4;
 429                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 430                 if (num_pols_changrp)
 431                         grange[1] = g_variant_new_uint64(devc->max_samplebytes / num_pols_changrp);
 432                 else
 433                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 434                 *data = g_variant_new_tuple(grange, 2);
 435                 break;
 436         default:
 437                 return SR_ERR_NA;
 438         }
 439
 440         return SR_OK;
 441 }
 442
 443 static int dev_open(struct sr_dev_inst *sdi)
 444 {
 445         struct dev_context *devc;
 446
 447         devc = sdi->priv;
 448
 449         if (p_ols_open(devc) != SR_OK) {
 450                 return SR_ERR;
 451         } else {
 452           sdi->status = SR_ST_ACTIVE;
 453                 return SR_OK;
 454         }
 455 }
 456
 457 static int dev_close(struct sr_dev_inst *sdi)
 458 {
 459         int ret;
 460         struct dev_context *devc;
 461
 462         ret = SR_OK;
 463         devc = sdi->priv;
 464
 465         if (sdi->status == SR_ST_ACTIVE) {
 466                 sr_dbg("Status ACTIVE, closing device.");
 467                 ret = p_ols_close(devc);
 468         } else {
 469                 sr_spew("Status not ACTIVE, nothing to do.");
 470         }
 471
 472         sdi->status = SR_ST_INACTIVE;
 473
 474         return ret;
 475 }
 476
 477
 478 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 479 {
 480         struct dev_context *devc;
 481         uint8_t cmd, arg[4];
 482
 483         devc = sdi->priv;
 484
 485         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 486         arg[0] = devc->trigger_mask[stage] & 0xff;
 487         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 488         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 489         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 490         if (write_longcommand(devc, cmd, arg) != SR_OK)
 491                 return SR_ERR;
 492
 493         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 494         arg[0] = devc->trigger_value[stage] & 0xff;
 495         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 496         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 497         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 498         if (write_longcommand(devc, cmd, arg) != SR_OK)
 499                 return SR_ERR;
 500
 501         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 502         arg[0] = arg[1] = arg[3] = 0x00;
 503         arg[2] = stage;
 504         if (stage == devc->num_stages)
 505                 /* Last stage, fire when this one matches. */
 506                 arg[3] |= TRIGGER_START;
 507         if (write_longcommand(devc, cmd, arg) != SR_OK)
 508                 return SR_ERR;
 509
 510         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 511         arg[0] = devc->trigger_edge[stage] & 0xff;
 512         arg[1] = (devc->trigger_edge[stage] >> 8) & 0xff;
 513         arg[2] = (devc->trigger_edge[stage] >> 16) & 0xff;
 514         arg[3] = (devc->trigger_edge[stage] >> 24) & 0xff;
 515         if (write_longcommand(devc, cmd, arg) != SR_OK)
 516                 return SR_ERR;
 517
 518         return SR_OK;
 519 }
 520
 521 static int disable_trigger(const struct sr_dev_inst *sdi, int stage)
 522 {
 523         struct dev_context *devc;
 524         uint8_t cmd, arg[4];
 525
 526         devc = sdi->priv;
 527
 528         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 529         arg[0] = arg[1] = arg[2] = arg[3] = 0x00;
 530         if (write_longcommand(devc, cmd, arg) != SR_OK)
 531                 return SR_ERR;
 532
 533         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 534         if (write_longcommand(devc, cmd, arg) != SR_OK)
 535                 return SR_ERR;
 536
 537         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 538         arg[2] = 0x03;
 539         if (write_longcommand(devc, cmd, arg) != SR_OK)
 540                 return SR_ERR;
 541
 542         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 543         arg[2] = 0x00;
 544         if (write_longcommand(devc, cmd, arg) != SR_OK)
 545                 return SR_ERR;
 546
 547         return SR_OK;
 548 }
 549
 550 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 551                 void *cb_data)
 552 {
 553         struct dev_context *devc;
 554         uint32_t samplecount, readcount, delaycount;
 555         uint8_t pols_changrp_mask, arg[4];
 556         uint16_t flag_tmp;
 557         int num_pols_changrp, samplespercount;
 558         int ret, i;
 559
 560         if (sdi->status != SR_ST_ACTIVE)
 561                 return SR_ERR_DEV_CLOSED;
 562
 563         devc = sdi->priv;
 564
 565         pols_channel_mask(sdi);
 566
 567         /*
 568          * Enable/disable channel groups in the flag register according to the
 569          * channel mask. Calculate this here, because num_pols_changrp is
 570          * needed to limit readcount.
 571          */
 572         pols_changrp_mask = 0;
 573         num_pols_changrp = 0;
 574         for (i = 0; i < 4; i++) {
 575                 if (devc->channel_mask & (0xff << (i * 8))) {
 576                         pols_changrp_mask |= (1 << i);
 577                         num_pols_changrp++;
 578                 }
 579         }
 580         /* 3 channel groups takes as many bytes as 4 channel groups */
 581         if (num_pols_changrp == 3)
 582                 num_pols_changrp = 4;
 583         /* maximum number of samples (or RLE counts) the buffer memory can hold */
 584         devc->max_samples = devc->max_samplebytes / num_pols_changrp;
 585
 586         /*
 587          * Limit readcount to prevent reading past the end of the hardware
 588          * buffer.
 589          */
 590         sr_dbg("max_samples = %d", devc->max_samples);
 591         sr_dbg("limit_samples = %d", devc->limit_samples);
 592         samplecount = MIN(devc->max_samples, devc->limit_samples);
 593         sr_dbg("Samplecount = %d", samplecount);
 594
 595         /* In demux mode the OLS is processing two samples per clock */
 596         if (devc->flag_reg & FLAG_DEMUX) {
 597                 samplespercount = 8;
 598         }
 599         else {
 600                 samplespercount = 4;
 601         }
 602
 603         readcount = samplecount / samplespercount;
 604
 605         /* Rather read too many samples than too few. */
 606         if (samplecount % samplespercount != 0)
 607                 readcount++;
 608
 609         /* Basic triggers. */
 610         if (pols_convert_trigger(sdi) != SR_OK) {
 611                 sr_err("Failed to configure channels.");
 612                 return SR_ERR;
 613         }
 614
 615         if (devc->num_stages > 0) {
 616                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 617                 devc->trigger_at = (readcount - delaycount) * samplespercount - devc->num_stages;
 618                 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 619                         if (i <= devc->num_stages) {
 620                                 sr_dbg("Setting p-ols stage %d trigger.", i);
 621                                 if ((ret = set_trigger(sdi, i)) != SR_OK)
 622                                         return ret;
 623                         }
 624                         else {
 625                                 sr_dbg("Disabling p-ols stage %d trigger.", i);
 626                                 if ((ret = disable_trigger(sdi, i)) != SR_OK)
 627                                         return ret;
 628                         }
 629                 }
 630         } else {
 631                 /* No triggers configured, force trigger on first stage. */
 632                 sr_dbg("Forcing trigger at stage 0.");
 633                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 634                         return ret;
 635                 delaycount = readcount;
 636         }
 637
 638         /* Samplerate. */
 639         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 640                         devc->cur_samplerate, devc->cur_samplerate_divider);
 641         arg[0] = devc->cur_samplerate_divider & 0xff;
 642         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 643         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 644         arg[3] = 0x00;
 645         if (write_longcommand(devc, CMD_SET_DIVIDER, arg) != SR_OK)
 646                 return SR_ERR;
 647
 648         /* Send extended sample limit and pre/post-trigger capture ratio. */
 649         arg[0] = ((readcount - 1) & 0xff);
 650         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 651         arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 652         arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 653         if (write_longcommand(devc, CMD_CAPTURE_DELAY, arg) != SR_OK)
 654                 return SR_ERR;
 655         arg[0] = ((delaycount - 1) & 0xff);
 656         arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 657         arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 658         arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 659         if (write_longcommand(devc, CMD_CAPTURE_COUNT, arg) != SR_OK)
 660                 return SR_ERR;
 661
 662         /* Flag register. */
 663         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 664                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 665                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 666                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 667                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 668                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 669
 670         /*
 671         * Enable/disable OLS channel groups in the flag register according
 672         * to the channel mask. 1 means "disable channel".
 673         */
 674         devc->flag_reg &= ~0x3c;
 675         devc->flag_reg |= ~(pols_changrp_mask << 2) & 0x3c;
 676         sr_dbg("flag_reg = %x", devc->flag_reg);
 677
 678         /*
 679         * In demux mode the OLS is processing two 8-bit or 16-bit samples
 680         * in parallel and for this to work the lower two bits of the four
 681         * "channel_disable" bits must be replicated to the upper two bits.
 682         */
 683         flag_tmp = devc->flag_reg;
 684         if (devc->flag_reg & FLAG_DEMUX) {
 685                 flag_tmp &= ~0x30;
 686                 flag_tmp |= ~(pols_changrp_mask << 4) & 0x30;
 687         }
 688         arg[0] = flag_tmp & 0xff;
 689         arg[1] = flag_tmp >> 8;
 690         arg[2] = arg[3] = 0x00;
 691         if (write_longcommand(devc, CMD_SET_FLAGS, arg) != SR_OK)
 692                 return SR_ERR;
 693
 694         /* Start acquisition on the device. */
 695         if (write_shortcommand(devc, CMD_RUN) != SR_OK)
 696                 return SR_ERR;
 697
 698         /* Reset all operational states. */
 699         devc->rle_count = devc->num_transfers = 0;
 700         devc->num_samples = devc->num_bytes = 0;
 701         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 702         memset(devc->sample, 0, 4);
 703
 704         /* Send header packet to the session bus. */
 705         std_session_send_df_header(cb_data, LOG_PREFIX);
 706
 707         /* Hook up a dummy handler to receive data from the device. */
 708         sr_session_source_add(sdi->session, 0, G_IO_IN, 10, p_ols_receive_data,
 709                         cb_data);
 710
 711         return SR_OK;
 712 }
 713
 714
 715
 716 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 717 {
 718         struct dev_context *devc;
 719         struct sr_datafeed_packet packet;
 720
 721         devc = sdi->priv;
 722
 723         sr_dbg("Stopping acquisition.");
 724         write_shortcommand(devc, CMD_RESET);
 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
 730         sr_session_source_remove(sdi->session, 0);
 731
 732         /* Send end packet to the session bus. */
 733         sr_dbg("Sending SR_DF_END.");
 734         packet.type = SR_DF_END;
 735         sr_session_send(cb_data, &packet);
 736
 737         return SR_OK;
 738 }
 739
 740 SR_PRIV struct sr_dev_driver p_ols_driver_info = {
 741         .name = "p-ols",
 742         .longname = "Pipistrello OLS",
 743         .api_version = 1,
 744         .init = init,
 745         .cleanup = cleanup,
 746         .scan = scan,
 747         .dev_list = dev_list,
 748         .dev_clear = dev_clear,
 749         .config_get = config_get,
 750         .config_set = config_set,
 751         .config_list = config_list,
 752         .dev_open = dev_open,
 753         .dev_close = dev_close,
 754         .dev_acquisition_start = dev_acquisition_start,
 755         .dev_acquisition_stop = dev_acquisition_stop,
 756         .priv = NULL,
 757 };