src/hardware/saleae-logic16/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
   5  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   6  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <config.h>
  23 #include <glib.h>
  24 #include <libusb.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <math.h>
  28 #include <libsigrok/libsigrok.h>
  29 #include "libsigrok-internal.h"
  30 #include "protocol.h"
  31
  32 #define LOGIC16_VID             0x21a9
  33 #define LOGIC16_PID             0x1001
  34
  35 #define USB_INTERFACE           0
  36 #define USB_CONFIGURATION       1
  37 #define FX2_FIRMWARE            "saleae-logic16-fx2.fw"
  38
  39 #define MAX_RENUM_DELAY_MS      3000
  40 #define NUM_SIMUL_TRANSFERS     32
  41
  42 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info;
  43
  44 static const uint32_t scanopts[] = {
  45         SR_CONF_CONN,
  46 };
  47
  48 static const uint32_t devopts[] = {
  49         SR_CONF_LOGIC_ANALYZER,
  50         SR_CONF_CONTINUOUS,
  51         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  52         SR_CONF_CONN | SR_CONF_GET,
  53         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  54         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  55         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  56         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  57 };
  58
  59 static const int32_t soft_trigger_matches[] = {
  60         SR_TRIGGER_ZERO,
  61         SR_TRIGGER_ONE,
  62         SR_TRIGGER_RISING,
  63         SR_TRIGGER_FALLING,
  64         SR_TRIGGER_EDGE,
  65 };
  66
  67 static const char *channel_names[] = {
  68         "0", "1", "2", "3", "4", "5", "6", "7", "8",
  69         "9", "10", "11", "12", "13", "14", "15",
  70 };
  71
  72 static const struct {
  73         enum voltage_range range;
  74         gdouble low;
  75         gdouble high;
  76 } volt_thresholds[] = {
  77         { VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
  78         { VOLTAGE_RANGE_5_V,     1.4, 3.6 },
  79 };
  80
  81 static const uint64_t samplerates[] = {
  82         SR_KHZ(500),
  83         SR_MHZ(1),
  84         SR_MHZ(2),
  85         SR_MHZ(4),
  86         SR_MHZ(5),
  87         SR_MHZ(8),
  88         SR_MHZ(10),
  89         SR_KHZ(12500),
  90         SR_MHZ(16),
  91         SR_MHZ(25),
  92         SR_MHZ(32),
  93         SR_MHZ(40),
  94         SR_MHZ(80),
  95         SR_MHZ(100),
  96 };
  97
  98 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  99 {
 100         return std_init(sr_ctx, di, LOG_PREFIX);
 101 }
 102
 103 static gboolean check_conf_profile(libusb_device *dev)
 104 {
 105         struct libusb_device_descriptor des;
 106         struct libusb_device_handle *hdl;
 107         gboolean ret;
 108         unsigned char strdesc[64];
 109
 110         hdl = NULL;
 111         ret = FALSE;
 112         while (!ret) {
 113                 /* Assume the FW has not been loaded, unless proven wrong. */
 114                 libusb_get_device_descriptor(dev, &des);
 115
 116                 if (libusb_open(dev, &hdl) != 0)
 117                         break;
 118
 119                 if (libusb_get_string_descriptor_ascii(hdl,
 120                     des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
 121                         break;
 122                 if (strcmp((const char *)strdesc, "Saleae LLC"))
 123                         break;
 124
 125                 if (libusb_get_string_descriptor_ascii(hdl,
 126                     des.iProduct, strdesc, sizeof(strdesc)) < 0)
 127                         break;
 128                 if (strcmp((const char *)strdesc, "Logic S/16"))
 129                         break;
 130
 131                 /* If we made it here, it must be a configured Logic16. */
 132                 ret = TRUE;
 133         }
 134         if (hdl)
 135                 libusb_close(hdl);
 136
 137         return ret;
 138 }
 139
 140 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 141 {
 142         struct drv_context *drvc;
 143         struct dev_context *devc;
 144         struct sr_dev_inst *sdi;
 145         struct sr_usb_dev_inst *usb;
 146         struct sr_config *src;
 147         GSList *l, *devices, *conn_devices;
 148         struct libusb_device_descriptor des;
 149         libusb_device **devlist;
 150         unsigned int i, j;
 151         const char *conn;
 152         char connection_id[64];
 153
 154         drvc = di->context;
 155
 156         conn = NULL;
 157         for (l = options; l; l = l->next) {
 158                 src = l->data;
 159                 switch (src->key) {
 160                 case SR_CONF_CONN:
 161                         conn = g_variant_get_string(src->data, NULL);
 162                         break;
 163                 }
 164         }
 165         if (conn)
 166                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 167         else
 168                 conn_devices = NULL;
 169
 170         /* Find all Logic16 devices and upload firmware to them. */
 171         devices = NULL;
 172         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 173         for (i = 0; devlist[i]; i++) {
 174                 if (conn) {
 175                         usb = NULL;
 176                         for (l = conn_devices; l; l = l->next) {
 177                                 usb = l->data;
 178                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 179                                     && usb->address == libusb_get_device_address(devlist[i]))
 180                                         break;
 181                         }
 182                         if (!l)
 183                                 /* This device matched none of the ones that
 184                                  * matched the conn specification. */
 185                                 continue;
 186                 }
 187
 188                 libusb_get_device_descriptor(devlist[i], &des);
 189
 190                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 191
 192                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 193                         continue;
 194
 195                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 196                 sdi->status = SR_ST_INITIALIZING;
 197                 sdi->vendor = g_strdup("Saleae");
 198                 sdi->model = g_strdup("Logic16");
 199                 sdi->driver = di;
 200                 sdi->connection_id = g_strdup(connection_id);
 201
 202                 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
 203                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 204                                             channel_names[j]);
 205
 206                 devc = g_malloc0(sizeof(struct dev_context));
 207                 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
 208                 sdi->priv = devc;
 209                 drvc->instances = g_slist_append(drvc->instances, sdi);
 210                 devices = g_slist_append(devices, sdi);
 211
 212                 if (check_conf_profile(devlist[i])) {
 213                         /* Already has the firmware, so fix the new address. */
 214                         sr_dbg("Found a Logic16 device.");
 215                         sdi->status = SR_ST_INACTIVE;
 216                         sdi->inst_type = SR_INST_USB;
 217                         sdi->conn = sr_usb_dev_inst_new(
 218                                 libusb_get_bus_number(devlist[i]),
 219                                 libusb_get_device_address(devlist[i]), NULL);
 220                 } else {
 221                         if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 222                                         USB_CONFIGURATION, FX2_FIRMWARE) == SR_OK)
 223                                 /* Store when this device's FW was updated. */
 224                                 devc->fw_updated = g_get_monotonic_time();
 225                         else
 226                                 sr_err("Firmware upload failed.");
 227                         sdi->inst_type = SR_INST_USB;
 228                         sdi->conn = sr_usb_dev_inst_new(
 229                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 230                 }
 231         }
 232         libusb_free_device_list(devlist, 1);
 233         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 234
 235         return devices;
 236 }
 237
 238 static GSList *dev_list(const struct sr_dev_driver *di)
 239 {
 240         return ((struct drv_context *)(di->context))->instances;
 241 }
 242
 243 static int logic16_dev_open(struct sr_dev_inst *sdi)
 244 {
 245         struct sr_dev_driver *di;
 246         libusb_device **devlist;
 247         struct sr_usb_dev_inst *usb;
 248         struct libusb_device_descriptor des;
 249         struct drv_context *drvc;
 250         int ret, i, device_count;
 251         char connection_id[64];
 252
 253         di = sdi->driver;
 254         drvc = di->context;
 255         usb = sdi->conn;
 256
 257         if (sdi->status == SR_ST_ACTIVE)
 258                 /* Device is already in use. */
 259                 return SR_ERR;
 260
 261         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 262         if (device_count < 0) {
 263                 sr_err("Failed to get device list: %s.",
 264                        libusb_error_name(device_count));
 265                 return SR_ERR;
 266         }
 267
 268         for (i = 0; i < device_count; i++) {
 269                 libusb_get_device_descriptor(devlist[i], &des);
 270
 271                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 272                         continue;
 273
 274                 if ((sdi->status == SR_ST_INITIALIZING) ||
 275                                 (sdi->status == SR_ST_INACTIVE)) {
 276                         /*
 277                          * Check device by its physical USB bus/port address.
 278                          */
 279                         usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 280                         if (strcmp(sdi->connection_id, connection_id))
 281                                 /* This is not the one. */
 282                                 continue;
 283                 }
 284
 285                 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
 286                         if (usb->address == 0xff)
 287                                 /*
 288                                  * First time we touch this device after FW
 289                                  * upload, so we don't know the address yet.
 290                                  */
 291                                 usb->address = libusb_get_device_address(devlist[i]);
 292                 } else {
 293                         sr_err("Failed to open device: %s.",
 294                                libusb_error_name(ret));
 295                         break;
 296                 }
 297
 298                 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 299                 if (ret == LIBUSB_ERROR_BUSY) {
 300                         sr_err("Unable to claim USB interface. Another "
 301                                "program or driver has already claimed it.");
 302                         break;
 303                 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 304                         sr_err("Device has been disconnected.");
 305                         break;
 306                 } else if (ret != 0) {
 307                         sr_err("Unable to claim interface: %s.",
 308                                libusb_error_name(ret));
 309                         break;
 310                 }
 311
 312                 if ((ret = logic16_init_device(sdi)) != SR_OK) {
 313                         sr_err("Failed to init device.");
 314                         break;
 315                 }
 316
 317                 sdi->status = SR_ST_ACTIVE;
 318                 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
 319                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 320
 321                 break;
 322         }
 323         libusb_free_device_list(devlist, 1);
 324
 325         if (sdi->status != SR_ST_ACTIVE) {
 326                 if (usb->devhdl) {
 327                         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 328                         libusb_close(usb->devhdl);
 329                         usb->devhdl = NULL;
 330                 }
 331                 return SR_ERR;
 332         }
 333
 334         return SR_OK;
 335 }
 336
 337 static int dev_open(struct sr_dev_inst *sdi)
 338 {
 339         struct dev_context *devc;
 340         int ret;
 341         int64_t timediff_us, timediff_ms;
 342
 343         devc = sdi->priv;
 344
 345         /*
 346          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 347          * milliseconds for the FX2 to renumerate.
 348          */
 349         ret = SR_ERR;
 350         if (devc->fw_updated > 0) {
 351                 sr_info("Waiting for device to reset.");
 352                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 353                 g_usleep(300 * 1000);
 354                 timediff_ms = 0;
 355                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 356                         if ((ret = logic16_dev_open(sdi)) == SR_OK)
 357                                 break;
 358                         g_usleep(100 * 1000);
 359
 360                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 361                         timediff_ms = timediff_us / 1000;
 362                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 363                 }
 364                 if (ret != SR_OK) {
 365                         sr_err("Device failed to renumerate.");
 366                         return SR_ERR;
 367                 }
 368                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 369         } else {
 370                 sr_info("Firmware upload was not needed.");
 371                 ret = logic16_dev_open(sdi);
 372         }
 373
 374         if (ret != SR_OK) {
 375                 sr_err("Unable to open device.");
 376                 return SR_ERR;
 377         }
 378
 379         if (devc->cur_samplerate == 0) {
 380                 /* Samplerate hasn't been set; default to the slowest one. */
 381                 devc->cur_samplerate = samplerates[0];
 382         }
 383
 384         return SR_OK;
 385 }
 386
 387 static int dev_close(struct sr_dev_inst *sdi)
 388 {
 389         struct sr_usb_dev_inst *usb;
 390
 391         usb = sdi->conn;
 392         if (!usb->devhdl)
 393                 return SR_ERR;
 394
 395         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 396                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 397         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 398         libusb_close(usb->devhdl);
 399         usb->devhdl = NULL;
 400         sdi->status = SR_ST_INACTIVE;
 401
 402         return SR_OK;
 403 }
 404
 405 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 406                 const struct sr_channel_group *cg)
 407 {
 408         struct dev_context *devc;
 409         struct sr_usb_dev_inst *usb;
 410         GVariant *range[2];
 411         char str[128];
 412         int ret;
 413         unsigned int i;
 414
 415         (void)cg;
 416
 417         ret = SR_OK;
 418         switch (key) {
 419         case SR_CONF_CONN:
 420                 if (!sdi || !sdi->conn)
 421                         return SR_ERR_ARG;
 422                 usb = sdi->conn;
 423                 if (usb->address == 255)
 424                         /* Device still needs to re-enumerate after firmware
 425                          * upload, so we don't know its (future) address. */
 426                         return SR_ERR;
 427                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 428                 *data = g_variant_new_string(str);
 429                 break;
 430         case SR_CONF_SAMPLERATE:
 431                 if (!sdi)
 432                         return SR_ERR;
 433                 devc = sdi->priv;
 434                 *data = g_variant_new_uint64(devc->cur_samplerate);
 435                 break;
 436         case SR_CONF_CAPTURE_RATIO:
 437                 if (!sdi)
 438                         return SR_ERR;
 439                 devc = sdi->priv;
 440                 *data = g_variant_new_uint64(devc->capture_ratio);
 441                 break;
 442         case SR_CONF_VOLTAGE_THRESHOLD:
 443                 if (!sdi)
 444                         return SR_ERR;
 445                 devc = sdi->priv;
 446                 ret = SR_ERR;
 447                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 448                         if (devc->selected_voltage_range !=
 449                             volt_thresholds[i].range)
 450                                 continue;
 451                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 452                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 453                         *data = g_variant_new_tuple(range, 2);
 454                         ret = SR_OK;
 455                         break;
 456                 }
 457                 break;
 458         default:
 459                 return SR_ERR_NA;
 460         }
 461
 462         return ret;
 463 }
 464
 465 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 466                 const struct sr_channel_group *cg)
 467 {
 468         struct dev_context *devc;
 469         gdouble low, high;
 470         int ret;
 471         unsigned int i;
 472
 473         (void)cg;
 474
 475         if (sdi->status != SR_ST_ACTIVE)
 476                 return SR_ERR_DEV_CLOSED;
 477
 478         devc = sdi->priv;
 479
 480         ret = SR_OK;
 481         switch (key) {
 482         case SR_CONF_SAMPLERATE:
 483                 devc->cur_samplerate = g_variant_get_uint64(data);
 484                 break;
 485         case SR_CONF_LIMIT_SAMPLES:
 486                 devc->limit_samples = g_variant_get_uint64(data);
 487                 break;
 488         case SR_CONF_CAPTURE_RATIO:
 489                 devc->capture_ratio = g_variant_get_uint64(data);
 490                 ret = (devc->capture_ratio > 100) ? SR_ERR : SR_OK;
 491                 break;
 492         case SR_CONF_VOLTAGE_THRESHOLD:
 493                 g_variant_get(data, "(dd)", &low, &high);
 494                 ret = SR_ERR_ARG;
 495                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 496                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 497                             fabs(volt_thresholds[i].high - high) < 0.1) {
 498                                 devc->selected_voltage_range =
 499                                         volt_thresholds[i].range;
 500                                 ret = SR_OK;
 501                                 break;
 502                         }
 503                 }
 504                 break;
 505         default:
 506                 ret = SR_ERR_NA;
 507         }
 508
 509         return ret;
 510 }
 511
 512 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 513                 const struct sr_channel_group *cg)
 514 {
 515         GVariant *gvar, *range[2];
 516         GVariantBuilder gvb;
 517         int ret;
 518         unsigned int i;
 519
 520         (void)sdi;
 521         (void)cg;
 522
 523         ret = SR_OK;
 524         switch (key) {
 525         case SR_CONF_SCAN_OPTIONS:
 526                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 527                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 528                 break;
 529         case SR_CONF_DEVICE_OPTIONS:
 530                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 531                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 532                 break;
 533         case SR_CONF_SAMPLERATE:
 534                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 535                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 536                         samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 537                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 538                 *data = g_variant_builder_end(&gvb);
 539                 break;
 540         case SR_CONF_VOLTAGE_THRESHOLD:
 541                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 542                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 543                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 544                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 545                         gvar = g_variant_new_tuple(range, 2);
 546                         g_variant_builder_add_value(&gvb, gvar);
 547                 }
 548                 *data = g_variant_builder_end(&gvb);
 549                 break;
 550         case SR_CONF_TRIGGER_MATCH:
 551                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 552                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 553                                 sizeof(int32_t));
 554                 break;
 555         default:
 556                 return SR_ERR_NA;
 557         }
 558
 559         return ret;
 560 }
 561
 562 static void abort_acquisition(struct dev_context *devc)
 563 {
 564         int i;
 565
 566         devc->sent_samples = -1;
 567
 568         for (i = devc->num_transfers - 1; i >= 0; i--) {
 569                 if (devc->transfers[i])
 570                         libusb_cancel_transfer(devc->transfers[i]);
 571         }
 572 }
 573
 574 static unsigned int bytes_per_ms(struct dev_context *devc)
 575 {
 576         return devc->cur_samplerate * devc->num_channels / 8000;
 577 }
 578
 579 static size_t get_buffer_size(struct dev_context *devc)
 580 {
 581         size_t s;
 582
 583         /*
 584          * The buffer should be large enough to hold 10ms of data and
 585          * a multiple of 512.
 586          */
 587         s = 10 * bytes_per_ms(devc);
 588         return (s + 511) & ~511;
 589 }
 590
 591 static unsigned int get_number_of_transfers(struct dev_context *devc)
 592 {
 593         unsigned int n;
 594
 595         /* Total buffer size should be able to hold about 500ms of data. */
 596         n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
 597
 598         if (n > NUM_SIMUL_TRANSFERS)
 599                 return NUM_SIMUL_TRANSFERS;
 600
 601         return n;
 602 }
 603
 604 static unsigned int get_timeout(struct dev_context *devc)
 605 {
 606         size_t total_size;
 607         unsigned int timeout;
 608
 609         total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
 610         timeout = total_size / bytes_per_ms(devc);
 611         return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
 612 }
 613
 614 static int configure_channels(const struct sr_dev_inst *sdi)
 615 {
 616         struct dev_context *devc;
 617         struct sr_channel *ch;
 618         GSList *l;
 619         uint16_t channel_bit;
 620
 621         devc = sdi->priv;
 622
 623         devc->cur_channels = 0;
 624         devc->num_channels = 0;
 625         for (l = sdi->channels; l; l = l->next) {
 626                 ch = (struct sr_channel *)l->data;
 627                 if (ch->enabled == FALSE)
 628                         continue;
 629
 630                 channel_bit = 1 << (ch->index);
 631
 632                 devc->cur_channels |= channel_bit;
 633
 634 #ifdef WORDS_BIGENDIAN
 635                 /*
 636                  * Output logic data should be stored in little endian format.
 637                  * To speed things up during conversion, do the switcharoo
 638                  * here instead.
 639                  */
 640                 channel_bit = 1 << (ch->index ^ 8);
 641 #endif
 642
 643                 devc->channel_masks[devc->num_channels++] = channel_bit;
 644         }
 645
 646         return SR_OK;
 647 }
 648
 649 static int receive_data(int fd, int revents, void *cb_data)
 650 {
 651         struct timeval tv;
 652         struct dev_context *devc;
 653         struct drv_context *drvc;
 654         const struct sr_dev_inst *sdi;
 655         struct sr_dev_driver *di;
 656
 657         (void)fd;
 658         (void)revents;
 659
 660         sdi = cb_data;
 661         di = sdi->driver;
 662         drvc = di->context;
 663         devc = sdi->priv;
 664
 665         tv.tv_sec = tv.tv_usec = 0;
 666         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 667
 668         if (devc->sent_samples == -2) {
 669                 logic16_abort_acquisition(sdi);
 670                 abort_acquisition(devc);
 671         }
 672
 673         return TRUE;
 674 }
 675
 676 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 677 {
 678         struct sr_dev_driver *di = sdi->driver;
 679         struct dev_context *devc;
 680         struct drv_context *drvc;
 681         struct sr_usb_dev_inst *usb;
 682         struct sr_trigger *trigger;
 683         struct libusb_transfer *transfer;
 684         unsigned int i, timeout, num_transfers;
 685         int ret;
 686         unsigned char *buf;
 687         size_t size, convsize;
 688
 689         if (sdi->status != SR_ST_ACTIVE)
 690                 return SR_ERR_DEV_CLOSED;
 691
 692         drvc = di->context;
 693         devc = sdi->priv;
 694         usb = sdi->conn;
 695
 696         /* Configures devc->cur_channels. */
 697         if (configure_channels(sdi) != SR_OK) {
 698                 sr_err("Failed to configure channels.");
 699                 return SR_ERR;
 700         }
 701
 702         devc->sent_samples = 0;
 703         devc->empty_transfer_count = 0;
 704         devc->cur_channel = 0;
 705         memset(devc->channel_data, 0, sizeof(devc->channel_data));
 706
 707         if ((trigger = sr_session_trigger_get(sdi->session))) {
 708                 int pre_trigger_samples = 0;
 709                 if (devc->limit_samples > 0)
 710                         pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
 711                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 712                 if (!devc->stl)
 713                         return SR_ERR_MALLOC;
 714                 devc->trigger_fired = FALSE;
 715         } else
 716                 devc->trigger_fired = TRUE;
 717
 718         timeout = get_timeout(devc);
 719         num_transfers = get_number_of_transfers(devc);
 720         size = get_buffer_size(devc);
 721         convsize = (size / devc->num_channels + 2) * 16;
 722         devc->submitted_transfers = 0;
 723
 724         devc->convbuffer_size = convsize;
 725         if (!(devc->convbuffer = g_try_malloc(convsize))) {
 726                 sr_err("Conversion buffer malloc failed.");
 727                 return SR_ERR_MALLOC;
 728         }
 729
 730         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 731         if (!devc->transfers) {
 732                 sr_err("USB transfers malloc failed.");
 733                 g_free(devc->convbuffer);
 734                 return SR_ERR_MALLOC;
 735         }
 736
 737         if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
 738                                              devc->cur_channels)) != SR_OK) {
 739                 g_free(devc->transfers);
 740                 g_free(devc->convbuffer);
 741                 return ret;
 742         }
 743
 744         devc->num_transfers = num_transfers;
 745         for (i = 0; i < num_transfers; i++) {
 746                 if (!(buf = g_try_malloc(size))) {
 747                         sr_err("USB transfer buffer malloc failed.");
 748                         if (devc->submitted_transfers)
 749                                 abort_acquisition(devc);
 750                         else {
 751                                 g_free(devc->transfers);
 752                                 g_free(devc->convbuffer);
 753                         }
 754                         return SR_ERR_MALLOC;
 755                 }
 756                 transfer = libusb_alloc_transfer(0);
 757                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 758                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 759                                 logic16_receive_transfer, (void *)sdi, timeout);
 760                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 761                         sr_err("Failed to submit transfer: %s.",
 762                                libusb_error_name(ret));
 763                         libusb_free_transfer(transfer);
 764                         g_free(buf);
 765                         abort_acquisition(devc);
 766                         return SR_ERR;
 767                 }
 768                 devc->transfers[i] = transfer;
 769                 devc->submitted_transfers++;
 770         }
 771
 772         devc->ctx = drvc->sr_ctx;
 773
 774         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
 775
 776         std_session_send_df_header(sdi, LOG_PREFIX);
 777
 778         if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
 779                 abort_acquisition(devc);
 780                 return ret;
 781         }
 782
 783         return SR_OK;
 784 }
 785
 786 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 787 {
 788         int ret;
 789
 790         if (sdi->status != SR_ST_ACTIVE)
 791                 return SR_ERR_DEV_CLOSED;
 792
 793         ret = logic16_abort_acquisition(sdi);
 794
 795         abort_acquisition(sdi->priv);
 796
 797         return ret;
 798 }
 799
 800 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = {
 801         .name = "saleae-logic16",
 802         .longname = "Saleae Logic16",
 803         .api_version = 1,
 804         .init = init,
 805         .cleanup = std_cleanup,
 806         .scan = scan,
 807         .dev_list = dev_list,
 808         .dev_clear = NULL,
 809         .config_get = config_get,
 810         .config_set = config_set,
 811         .config_list = config_list,
 812         .dev_open = dev_open,
 813         .dev_close = dev_close,
 814         .dev_acquisition_start = dev_acquisition_start,
 815         .dev_acquisition_stop = dev_acquisition_stop,
 816         .context = NULL,
 817 };