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