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
  80 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  81 {
  82         return std_init(sr_ctx, di, LOG_PREFIX);
  83 }
  84
  85 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  86 {
  87         struct sr_dev_inst *sdi;
  88         struct drv_context *drvc;
  89         struct dev_context *devc;
  90         GSList *devices;
  91         int ret, i;
  92         char buf[70];
  93         int bytes_read;
  94
  95         (void)options;
  96
  97         drvc = di->priv;
  98
  99         devices = NULL;
 100
 101         /* Allocate memory for our private device context. */
 102         devc = g_malloc0(sizeof(struct dev_context));
 103
 104         /* Device-specific settings */
 105         devc->max_samplebytes = devc->max_samplerate = devc->protocol_version = 0;
 106
 107         /* Acquisition settings */
 108         devc->limit_samples = devc->capture_ratio = 0;
 109         devc->trigger_at = -1;
 110         devc->channel_mask = 0xffffffff;
 111         devc->flag_reg = 0;
 112
 113         /* Allocate memory for the incoming ftdi data. */
 114         if (!(devc->ftdi_buf = g_try_malloc0(FTDI_BUF_SIZE))) {
 115                 sr_err("ftdi_buf malloc failed.");
 116                 goto err_free_devc;
 117         }
 118
 119         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
 120         if (!(devc->ftdic = ftdi_new())) {
 121                 sr_err("Failed to initialize libftdi.");
 122                 goto err_free_ftdi_buf;;
 123         }
 124
 125         /* Try to open the FTDI device */
 126         if (p_ols_open(devc) != SR_OK) {
 127                 goto err_free_ftdic;
 128         }
 129
 130         /* The discovery procedure is like this: first send the Reset
 131          * command (0x00) 5 times, since the device could be anywhere
 132          * in a 5-byte command. Then send the ID command (0x02).
 133          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 134          * have a match.
 135          */
 136
 137         ret = SR_OK;
 138         for (i = 0; i < 5; i++) {
 139                 if ((ret = write_shortcommand(devc, CMD_RESET)) != SR_OK) {
 140                         break;
 141                 }
 142         }
 143         if (ret != SR_OK) {
 144                 sr_err("Could not reset device. Quitting.");
 145                 goto err_close_ftdic;
 146         }
 147         write_shortcommand(devc, CMD_ID);
 148
 149         /* Read the response data. */
 150         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 4);
 151         if (bytes_read < 0) {
 152                 sr_err("Failed to read FTDI data (%d): %s.",
 153                        bytes_read, ftdi_get_error_string(devc->ftdic));
 154                 goto err_close_ftdic;
 155         }
 156         if (bytes_read == 0) {
 157                 goto err_close_ftdic;
 158         }
 159
 160         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 161                 goto err_close_ftdic;
 162
 163         /* Definitely using the OLS protocol, check if it supports
 164          * the metadata command.
 165          */
 166         write_shortcommand(devc, CMD_METADATA);
 167
 168         /* Read the metadata. */
 169         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 64);
 170         if (bytes_read < 0) {
 171                 sr_err("Failed to read FTDI data (%d): %s.",
 172                        bytes_read, ftdi_get_error_string(devc->ftdic));
 173                 goto err_close_ftdic;
 174         }
 175         if (bytes_read == 0) {
 176                 goto err_close_ftdic;
 177         }
 178
 179         /* Close device. We'll reopen it again when we need it. */
 180         p_ols_close(devc);
 181
 182         /* Parse the metadata. */
 183         sdi = p_ols_get_metadata((uint8_t *)buf, bytes_read, devc);
 184
 185         /* Configure samplerate and divider. */
 186         if (p_ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 187                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 188                                 DEFAULT_SAMPLERATE);
 189
 190         drvc->instances = g_slist_append(drvc->instances, sdi);
 191         devices = g_slist_append(devices, sdi);
 192
 193         return devices;
 194
 195 err_close_ftdic:
 196         p_ols_close(devc);
 197 err_free_ftdic:
 198         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
 199 err_free_ftdi_buf:
 200         g_free(devc->ftdi_buf);
 201 err_free_devc:
 202         g_free(devc);
 203
 204         return NULL;
 205 }
 206
 207 static GSList *dev_list(const struct sr_dev_driver *di)
 208 {
 209         return ((struct drv_context *)(di->priv))->instances;
 210 }
 211
 212 static void clear_helper(void *priv)
 213 {
 214         struct dev_context *devc;
 215
 216         devc = priv;
 217
 218         ftdi_free(devc->ftdic);
 219         g_free(devc->ftdi_buf);
 220 }
 221
 222 static int dev_clear(const struct sr_dev_driver *di)
 223 {
 224         return std_dev_clear(di, clear_helper);
 225 }
 226
 227 static int cleanup(const struct sr_dev_driver *di)
 228 {
 229         return dev_clear(di);
 230 }
 231
 232
 233 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 234                 const struct sr_channel_group *cg)
 235 {
 236         struct dev_context *devc;
 237
 238         (void)cg;
 239
 240         if (!sdi)
 241                 return SR_ERR_ARG;
 242
 243         devc = sdi->priv;
 244         switch (key) {
 245         case SR_CONF_SAMPLERATE:
 246                 *data = g_variant_new_uint64(devc->cur_samplerate);
 247                 break;
 248         case SR_CONF_CAPTURE_RATIO:
 249                 *data = g_variant_new_uint64(devc->capture_ratio);
 250                 break;
 251         case SR_CONF_LIMIT_SAMPLES:
 252                 *data = g_variant_new_uint64(devc->limit_samples);
 253                 break;
 254         case SR_CONF_PATTERN_MODE:
 255                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 256                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 257                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 258                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 259                 else
 260                         *data = g_variant_new_string(STR_PATTERN_NONE);
 261                 break;
 262         case SR_CONF_RLE:
 263                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 264                 break;
 265         case SR_CONF_EXTERNAL_CLOCK:
 266                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
 267                 break;
 268         default:
 269                 return SR_ERR_NA;
 270         }
 271
 272         return SR_OK;
 273 }
 274
 275 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 276                 const struct sr_channel_group *cg)
 277 {
 278         struct dev_context *devc;
 279         uint16_t flag;
 280         uint64_t tmp_u64;
 281         int ret;
 282         const char *stropt;
 283
 284         (void)cg;
 285
 286         if (sdi->status != SR_ST_ACTIVE)
 287                 return SR_ERR_DEV_CLOSED;
 288
 289         devc = sdi->priv;
 290
 291         switch (key) {
 292         case SR_CONF_SAMPLERATE:
 293                 tmp_u64 = g_variant_get_uint64(data);
 294                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 295                         return SR_ERR_SAMPLERATE;
 296                 ret = p_ols_set_samplerate(sdi, g_variant_get_uint64(data));
 297                 break;
 298         case SR_CONF_LIMIT_SAMPLES:
 299                 tmp_u64 = g_variant_get_uint64(data);
 300                 if (tmp_u64 < MIN_NUM_SAMPLES)
 301                         return SR_ERR;
 302                 devc->limit_samples = tmp_u64;
 303                 ret = SR_OK;
 304                 break;
 305         case SR_CONF_CAPTURE_RATIO:
 306                 devc->capture_ratio = g_variant_get_uint64(data);
 307                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 308                         devc->capture_ratio = 0;
 309                         ret = SR_ERR;
 310                 } else
 311                         ret = SR_OK;
 312                 break;
 313         case SR_CONF_EXTERNAL_CLOCK:
 314                 if (g_variant_get_boolean(data)) {
 315                         sr_info("Enabling external clock.");
 316                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 317                 } else {
 318                         sr_info("Disabled external clock.");
 319                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 320                 }
 321                 ret = SR_OK;
 322                 break;
 323         case SR_CONF_PATTERN_MODE:
 324                 stropt = g_variant_get_string(data, NULL);
 325                 ret = SR_OK;
 326                 flag = 0xffff;
 327                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 328                         sr_info("Disabling test modes.");
 329                         flag = 0x0000;
 330                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 331                         sr_info("Enabling internal test mode.");
 332                         flag = FLAG_INTERNAL_TEST_MODE;
 333                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 334                         sr_info("Enabling external test mode.");
 335                         flag = FLAG_EXTERNAL_TEST_MODE;
 336                 } else {
 337                         ret = SR_ERR;
 338                 }
 339                 if (flag != 0xffff) {
 340                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 341                         devc->flag_reg |= flag;
 342                 }
 343                 break;
 344         case SR_CONF_SWAP:
 345                 if (g_variant_get_boolean(data)) {
 346                         sr_info("Enabling channel swapping.");
 347                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 348                 } else {
 349                         sr_info("Disabling channel swapping.");
 350                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 351                 }
 352                 ret = SR_OK;
 353                 break;
 354
 355         case SR_CONF_RLE:
 356                 if (g_variant_get_boolean(data)) {
 357                         sr_info("Enabling RLE.");
 358                         devc->flag_reg |= FLAG_RLE;
 359                 } else {
 360                         sr_info("Disabling RLE.");
 361                         devc->flag_reg &= ~FLAG_RLE;
 362                 }
 363                 ret = SR_OK;
 364                 break;
 365         default:
 366                 ret = SR_ERR_NA;
 367         }
 368
 369         return ret;
 370 }
 371
 372 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 373                 const struct sr_channel_group *cg)
 374 {
 375         struct dev_context *devc;
 376         GVariant *gvar, *grange[2];
 377         GVariantBuilder gvb;
 378         int num_pols_changrp, i;
 379
 380         (void)cg;
 381
 382         switch (key) {
 383         case SR_CONF_DEVICE_OPTIONS:
 384                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 385                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 386                 break;
 387         case SR_CONF_SAMPLERATE:
 388                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 389                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 390                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 391                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 392                 *data = g_variant_builder_end(&gvb);
 393                 break;
 394         case SR_CONF_TRIGGER_MATCH:
 395                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 396                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 397                                 sizeof(int32_t));
 398                 break;
 399         case SR_CONF_PATTERN_MODE:
 400                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 401                 break;
 402         case SR_CONF_LIMIT_SAMPLES:
 403                 if (!sdi)
 404                         return SR_ERR_ARG;
 405                 devc = sdi->priv;
 406                 if (devc->flag_reg & FLAG_RLE)
 407                         return SR_ERR_NA;
 408                 if (devc->max_samplebytes == 0)
 409                         /* Device didn't specify sample memory size in metadata. */
 410                         return SR_ERR_NA;
 411                 /*
 412                  * Channel groups are turned off if no channels in that group are
 413                  * enabled, making more room for samples for the enabled group.
 414                 */
 415                 pols_channel_mask(sdi);
 416                 num_pols_changrp = 0;
 417                 for (i = 0; i < 4; i++) {
 418                         if (devc->channel_mask & (0xff << (i * 8)))
 419                                 num_pols_changrp++;
 420                 }
 421                 /* 3 channel groups takes as many bytes as 4 channel groups */
 422                 if (num_pols_changrp == 3)
 423                         num_pols_changrp = 4;
 424                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 425                 if (num_pols_changrp)
 426                         grange[1] = g_variant_new_uint64(devc->max_samplebytes / num_pols_changrp);
 427                 else
 428                         grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 429                 *data = g_variant_new_tuple(grange, 2);
 430                 break;
 431         default:
 432                 return SR_ERR_NA;
 433         }
 434
 435         return SR_OK;
 436 }
 437
 438 static int dev_open(struct sr_dev_inst *sdi)
 439 {
 440         struct dev_context *devc;
 441
 442         devc = sdi->priv;
 443
 444         if (p_ols_open(devc) != SR_OK) {
 445                 return SR_ERR;
 446         } else {
 447           sdi->status = SR_ST_ACTIVE;
 448                 return SR_OK;
 449         }
 450 }
 451
 452 static int dev_close(struct sr_dev_inst *sdi)
 453 {
 454         int ret;
 455         struct dev_context *devc;
 456
 457         ret = SR_OK;
 458         devc = sdi->priv;
 459
 460         if (sdi->status == SR_ST_ACTIVE) {
 461                 sr_dbg("Status ACTIVE, closing device.");
 462                 ret = p_ols_close(devc);
 463         } else {
 464                 sr_spew("Status not ACTIVE, nothing to do.");
 465         }
 466
 467         sdi->status = SR_ST_INACTIVE;
 468
 469         return ret;
 470 }
 471
 472
 473 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 474 {
 475         struct dev_context *devc;
 476         uint8_t cmd, arg[4];
 477
 478         devc = sdi->priv;
 479
 480         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 481         arg[0] = devc->trigger_mask[stage] & 0xff;
 482         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 483         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 484         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 485         if (write_longcommand(devc, cmd, arg) != SR_OK)
 486                 return SR_ERR;
 487
 488         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 489         arg[0] = devc->trigger_value[stage] & 0xff;
 490         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 491         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 492         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 493         if (write_longcommand(devc, cmd, arg) != SR_OK)
 494                 return SR_ERR;
 495
 496         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 497         arg[0] = arg[1] = arg[3] = 0x00;
 498         arg[2] = stage;
 499         if (stage == devc->num_stages)
 500                 /* Last stage, fire when this one matches. */
 501                 arg[3] |= TRIGGER_START;
 502         if (write_longcommand(devc, cmd, arg) != SR_OK)
 503                 return SR_ERR;
 504
 505         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 506         arg[0] = devc->trigger_edge[stage] & 0xff;
 507         arg[1] = (devc->trigger_edge[stage] >> 8) & 0xff;
 508         arg[2] = (devc->trigger_edge[stage] >> 16) & 0xff;
 509         arg[3] = (devc->trigger_edge[stage] >> 24) & 0xff;
 510         if (write_longcommand(devc, cmd, arg) != SR_OK)
 511                 return SR_ERR;
 512
 513         return SR_OK;
 514 }
 515
 516 static int disable_trigger(const struct sr_dev_inst *sdi, int stage)
 517 {
 518         struct dev_context *devc;
 519         uint8_t cmd, arg[4];
 520
 521         devc = sdi->priv;
 522
 523         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 524         arg[0] = arg[1] = arg[2] = arg[3] = 0x00;
 525         if (write_longcommand(devc, cmd, arg) != SR_OK)
 526                 return SR_ERR;
 527
 528         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 529         if (write_longcommand(devc, cmd, arg) != SR_OK)
 530                 return SR_ERR;
 531
 532         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 533         arg[2] = 0x03;
 534         if (write_longcommand(devc, cmd, arg) != SR_OK)
 535                 return SR_ERR;
 536
 537         cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
 538         arg[2] = 0x00;
 539         if (write_longcommand(devc, cmd, arg) != SR_OK)
 540                 return SR_ERR;
 541
 542         return SR_OK;
 543 }
 544
 545 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 546                 void *cb_data)
 547 {
 548         struct dev_context *devc;
 549         uint32_t samplecount, readcount, delaycount;
 550         uint8_t pols_changrp_mask, arg[4];
 551         uint16_t flag_tmp;
 552         int num_pols_changrp, samplespercount;
 553         int ret, i;
 554
 555         if (sdi->status != SR_ST_ACTIVE)
 556                 return SR_ERR_DEV_CLOSED;
 557
 558         devc = sdi->priv;
 559
 560         pols_channel_mask(sdi);
 561
 562         /*
 563          * Enable/disable channel groups in the flag register according to the
 564          * channel mask. Calculate this here, because num_pols_changrp is
 565          * needed to limit readcount.
 566          */
 567         pols_changrp_mask = 0;
 568         num_pols_changrp = 0;
 569         for (i = 0; i < 4; i++) {
 570                 if (devc->channel_mask & (0xff << (i * 8))) {
 571                         pols_changrp_mask |= (1 << i);
 572                         num_pols_changrp++;
 573                 }
 574         }
 575         /* 3 channel groups takes as many bytes as 4 channel groups */
 576         if (num_pols_changrp == 3)
 577                 num_pols_changrp = 4;
 578         /* maximum number of samples (or RLE counts) the buffer memory can hold */
 579         devc->max_samples = devc->max_samplebytes / num_pols_changrp;
 580
 581         /*
 582          * Limit readcount to prevent reading past the end of the hardware
 583          * buffer.
 584          */
 585         sr_dbg("max_samples = %d", devc->max_samples);
 586         sr_dbg("limit_samples = %d", devc->limit_samples);
 587         samplecount = MIN(devc->max_samples, devc->limit_samples);
 588         sr_dbg("Samplecount = %d", samplecount);
 589
 590         /* In demux mode the OLS is processing two samples per clock */
 591         if (devc->flag_reg & FLAG_DEMUX) {
 592                 samplespercount = 8;
 593         }
 594         else {
 595                 samplespercount = 4;
 596         }
 597
 598         readcount = samplecount / samplespercount;
 599
 600         /* Rather read too many samples than too few. */
 601         if (samplecount % samplespercount != 0)
 602                 readcount++;
 603
 604         /* Basic triggers. */
 605         if (pols_convert_trigger(sdi) != SR_OK) {
 606                 sr_err("Failed to configure channels.");
 607                 return SR_ERR;
 608         }
 609
 610         if (devc->num_stages > 0) {
 611                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 612                 devc->trigger_at = (readcount - delaycount) * samplespercount - devc->num_stages;
 613                 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
 614                         if (i <= devc->num_stages) {
 615                                 sr_dbg("Setting p-ols stage %d trigger.", i);
 616                                 if ((ret = set_trigger(sdi, i)) != SR_OK)
 617                                         return ret;
 618                         }
 619                         else {
 620                                 sr_dbg("Disabling p-ols stage %d trigger.", i);
 621                                 if ((ret = disable_trigger(sdi, i)) != SR_OK)
 622                                         return ret;
 623                         }
 624                 }
 625         } else {
 626                 /* No triggers configured, force trigger on first stage. */
 627                 sr_dbg("Forcing trigger at stage 0.");
 628                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 629                         return ret;
 630                 delaycount = readcount;
 631         }
 632
 633         /* Samplerate. */
 634         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 635                         devc->cur_samplerate, devc->cur_samplerate_divider);
 636         arg[0] = devc->cur_samplerate_divider & 0xff;
 637         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 638         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 639         arg[3] = 0x00;
 640         if (write_longcommand(devc, CMD_SET_DIVIDER, arg) != SR_OK)
 641                 return SR_ERR;
 642
 643         /* Send extended sample limit and pre/post-trigger capture ratio. */
 644         arg[0] = ((readcount - 1) & 0xff);
 645         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 646         arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 647         arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 648         if (write_longcommand(devc, CMD_CAPTURE_DELAY, arg) != SR_OK)
 649                 return SR_ERR;
 650         arg[0] = ((delaycount - 1) & 0xff);
 651         arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 652         arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 653         arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 654         if (write_longcommand(devc, CMD_CAPTURE_COUNT, arg) != SR_OK)
 655                 return SR_ERR;
 656
 657         /* Flag register. */
 658         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 659                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 660                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 661                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 662                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 663                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 664
 665         /*
 666         * Enable/disable OLS channel groups in the flag register according
 667         * to the channel mask. 1 means "disable channel".
 668         */
 669         devc->flag_reg &= ~0x3c;
 670         devc->flag_reg |= ~(pols_changrp_mask << 2) & 0x3c;
 671         sr_dbg("flag_reg = %x", devc->flag_reg);
 672
 673         /*
 674         * In demux mode the OLS is processing two 8-bit or 16-bit samples
 675         * in parallel and for this to work the lower two bits of the four
 676         * "channel_disable" bits must be replicated to the upper two bits.
 677         */
 678         flag_tmp = devc->flag_reg;
 679         if (devc->flag_reg & FLAG_DEMUX) {
 680                 flag_tmp &= ~0x30;
 681                 flag_tmp |= ~(pols_changrp_mask << 4) & 0x30;
 682         }
 683         arg[0] = flag_tmp & 0xff;
 684         arg[1] = flag_tmp >> 8;
 685         arg[2] = arg[3] = 0x00;
 686         if (write_longcommand(devc, CMD_SET_FLAGS, arg) != SR_OK)
 687                 return SR_ERR;
 688
 689         /* Start acquisition on the device. */
 690         if (write_shortcommand(devc, CMD_RUN) != SR_OK)
 691                 return SR_ERR;
 692
 693         /* Reset all operational states. */
 694         devc->rle_count = devc->num_transfers = 0;
 695         devc->num_samples = devc->num_bytes = 0;
 696         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 697         memset(devc->sample, 0, 4);
 698
 699         /* Send header packet to the session bus. */
 700         std_session_send_df_header(cb_data, LOG_PREFIX);
 701
 702         /* Hook up a dummy handler to receive data from the device. */
 703         sr_session_source_add(sdi->session, 0, G_IO_IN, 10, p_ols_receive_data,
 704                         cb_data);
 705
 706         return SR_OK;
 707 }
 708
 709
 710
 711 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 712 {
 713         struct dev_context *devc;
 714         struct sr_datafeed_packet packet;
 715
 716         devc = sdi->priv;
 717
 718         sr_dbg("Stopping acquisition.");
 719         write_shortcommand(devc, CMD_RESET);
 720         write_shortcommand(devc, CMD_RESET);
 721         write_shortcommand(devc, CMD_RESET);
 722         write_shortcommand(devc, CMD_RESET);
 723         write_shortcommand(devc, CMD_RESET);
 724
 725         sr_session_source_remove(sdi->session, 0);
 726
 727         /* Send end packet to the session bus. */
 728         sr_dbg("Sending SR_DF_END.");
 729         packet.type = SR_DF_END;
 730         sr_session_send(cb_data, &packet);
 731
 732         return SR_OK;
 733 }
 734
 735 SR_PRIV struct sr_dev_driver p_ols_driver_info = {
 736         .name = "p-ols",
 737         .longname = "Pipistrello OLS",
 738         .api_version = 1,
 739         .init = init,
 740         .cleanup = cleanup,
 741         .scan = scan,
 742         .dev_list = dev_list,
 743         .dev_clear = dev_clear,
 744         .config_get = config_get,
 745         .config_set = config_set,
 746         .config_list = config_list,
 747         .dev_open = dev_open,
 748         .dev_close = dev_close,
 749         .dev_acquisition_start = dev_acquisition_start,
 750         .dev_acquisition_stop = dev_acquisition_stop,
 751         .priv = NULL,
 752 };