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 <glib.h>
  23 #include <libusb.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <math.h>
  27 #include "libsigrok.h"
  28 #include "libsigrok-internal.h"
  29 #include "protocol.h"
  30
  31 #define LOGIC16_VID             0x21a9
  32 #define LOGIC16_PID             0x1001
  33
  34 #define USB_INTERFACE           0
  35 #define USB_CONFIGURATION       1
  36 #define FX2_FIRMWARE            FIRMWARE_DIR "/saleae-logic16-fx2.fw"
  37
  38 #define MAX_RENUM_DELAY_MS      3000
  39 #define NUM_SIMUL_TRANSFERS     32
  40
  41 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info;
  42 static struct sr_dev_driver *di = &saleae_logic16_driver_info;
  43
  44 static const int32_t hwopts[] = {
  45         SR_CONF_CONN,
  46 };
  47
  48 static const int32_t hwcaps[] = {
  49         SR_CONF_LOGIC_ANALYZER,
  50         SR_CONF_SAMPLERATE,
  51         SR_CONF_VOLTAGE_THRESHOLD,
  52
  53         /* These are really implemented in the driver, not the hardware. */
  54         SR_CONF_LIMIT_SAMPLES,
  55         SR_CONF_CONTINUOUS,
  56 };
  57
  58 static const char *probe_names[] = {
  59         "0", "1", "2", "3", "4", "5", "6", "7", "8",
  60         "9", "10", "11", "12", "13", "14", "15",
  61         NULL,
  62 };
  63
  64 static const struct {
  65         enum voltage_range range;
  66         gdouble low;
  67         gdouble high;
  68 } volt_thresholds[] = {
  69         { VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
  70         { VOLTAGE_RANGE_5_V,     1.4, 3.6 },
  71 };
  72
  73 static const uint64_t samplerates[] = {
  74         SR_KHZ(500),
  75         SR_MHZ(1),
  76         SR_MHZ(2),
  77         SR_MHZ(4),
  78         SR_MHZ(5),
  79         SR_MHZ(8),
  80         SR_MHZ(10),
  81         SR_KHZ(12500),
  82         SR_MHZ(16),
  83         SR_MHZ(25),
  84         SR_MHZ(32),
  85         SR_MHZ(40),
  86         SR_MHZ(80),
  87         SR_MHZ(100),
  88 };
  89
  90 static int init(struct sr_context *sr_ctx)
  91 {
  92         return std_init(sr_ctx, di, LOG_PREFIX);
  93 }
  94
  95 static gboolean check_conf_profile(libusb_device *dev)
  96 {
  97         struct libusb_device_descriptor des;
  98         struct libusb_device_handle *hdl;
  99         gboolean ret;
 100         unsigned char strdesc[64];
 101
 102         hdl = NULL;
 103         ret = FALSE;
 104         while (!ret) {
 105                 /* Assume the FW has not been loaded, unless proven wrong. */
 106                 if (libusb_get_device_descriptor(dev, &des) != 0)
 107                         break;
 108
 109                 if (libusb_open(dev, &hdl) != 0)
 110                         break;
 111
 112                 if (libusb_get_string_descriptor_ascii(hdl,
 113                     des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
 114                         break;
 115                 if (strcmp((const char *)strdesc, "Saleae LLC"))
 116                         break;
 117
 118                 if (libusb_get_string_descriptor_ascii(hdl,
 119                     des.iProduct, strdesc, sizeof(strdesc)) < 0)
 120                         break;
 121                 if (strcmp((const char *)strdesc, "Logic S/16"))
 122                         break;
 123
 124                 /* If we made it here, it must be a configured Logic16. */
 125                 ret = TRUE;
 126         }
 127         if (hdl)
 128                 libusb_close(hdl);
 129
 130         return ret;
 131 }
 132
 133 static GSList *scan(GSList *options)
 134 {
 135         struct drv_context *drvc;
 136         struct dev_context *devc;
 137         struct sr_dev_inst *sdi;
 138         struct sr_usb_dev_inst *usb;
 139         struct sr_probe *probe;
 140         struct sr_config *src;
 141         GSList *l, *devices, *conn_devices;
 142         struct libusb_device_descriptor des;
 143         libusb_device **devlist;
 144         int devcnt, ret, i, j;
 145         const char *conn;
 146
 147         drvc = di->priv;
 148
 149         conn = NULL;
 150         for (l = options; l; l = l->next) {
 151                 src = l->data;
 152                 switch (src->key) {
 153                 case SR_CONF_CONN:
 154                         conn = g_variant_get_string(src->data, NULL);
 155                         break;
 156                 }
 157         }
 158         if (conn)
 159                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 160         else
 161                 conn_devices = NULL;
 162
 163         /* Find all Logic16 devices and upload firmware to them. */
 164         devices = NULL;
 165         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 166         for (i = 0; devlist[i]; i++) {
 167                 if (conn) {
 168                         usb = NULL;
 169                         for (l = conn_devices; l; l = l->next) {
 170                                 usb = l->data;
 171                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 172                                     && usb->address == libusb_get_device_address(devlist[i]))
 173                                         break;
 174                         }
 175                         if (!l)
 176                                 /* This device matched none of the ones that
 177                                  * matched the conn specification. */
 178                                 continue;
 179                 }
 180
 181                 if ((ret = libusb_get_device_descriptor(devlist[i], &des)) != 0) {
 182                         sr_warn("Failed to get device descriptor: %s.",
 183                                 libusb_error_name(ret));
 184                         continue;
 185                 }
 186
 187                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 188                         continue;
 189
 190                 devcnt = g_slist_length(drvc->instances);
 191                 sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING,
 192                                       "Saleae", "Logic16", NULL);
 193                 if (!sdi)
 194                         return NULL;
 195                 sdi->driver = di;
 196
 197                 for (j = 0; probe_names[j]; j++) {
 198                         if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
 199                                                    probe_names[j])))
 200                                 return NULL;
 201                         sdi->probes = g_slist_append(sdi->probes, probe);
 202                 }
 203
 204                 if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
 205                         return NULL;
 206                 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
 207                 sdi->priv = devc;
 208                 drvc->instances = g_slist_append(drvc->instances, sdi);
 209                 devices = g_slist_append(devices, sdi);
 210
 211                 if (check_conf_profile(devlist[i])) {
 212                         /* Already has the firmware, so fix the new address. */
 213                         sr_dbg("Found a Logic16 device.");
 214                         sdi->status = SR_ST_INACTIVE;
 215                         sdi->inst_type = SR_INST_USB;
 216                         sdi->conn = sr_usb_dev_inst_new(
 217                                 libusb_get_bus_number(devlist[i]),
 218                                 libusb_get_device_address(devlist[i]), NULL);
 219                 } else {
 220                         if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 221                                                   FX2_FIRMWARE) == SR_OK)
 222                                 /* Store when this device's FW was updated. */
 223                                 devc->fw_updated = g_get_monotonic_time();
 224                         else
 225                                 sr_err("Firmware upload failed for "
 226                                        "device %d.", devcnt);
 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(void)
 239 {
 240         return ((struct drv_context *)(di->priv))->instances;
 241 }
 242
 243 static int dev_clear(void)
 244 {
 245         return std_dev_clear(di, NULL);
 246 }
 247
 248 static int logic16_dev_open(struct sr_dev_inst *sdi)
 249 {
 250         libusb_device **devlist;
 251         struct sr_usb_dev_inst *usb;
 252         struct libusb_device_descriptor des;
 253         struct drv_context *drvc;
 254         int ret, skip, i, device_count;
 255
 256         drvc = di->priv;
 257         usb = sdi->conn;
 258
 259         if (sdi->status == SR_ST_ACTIVE)
 260                 /* Device is already in use. */
 261                 return SR_ERR;
 262
 263         skip = 0;
 264         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 265         if (device_count < 0) {
 266                 sr_err("Failed to get device list: %s.",
 267                        libusb_error_name(device_count));
 268                 return SR_ERR;
 269         }
 270
 271         for (i = 0; i < device_count; i++) {
 272                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 273                         sr_err("Failed to get device descriptor: %s.",
 274                                libusb_error_name(ret));
 275                         continue;
 276                 }
 277
 278                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 279                         continue;
 280
 281                 if (sdi->status == SR_ST_INITIALIZING) {
 282                         if (skip != sdi->index) {
 283                                 /* Skip devices of this type that aren't the one we want. */
 284                                 skip += 1;
 285                                 continue;
 286                         }
 287                 } else if (sdi->status == SR_ST_INACTIVE) {
 288                         /*
 289                          * This device is fully enumerated, so we need to find
 290                          * this device by vendor, product, bus and address.
 291                          */
 292                         if (libusb_get_bus_number(devlist[i]) != usb->bus
 293                             || libusb_get_device_address(devlist[i]) != usb->address)
 294                                 /* This is not the one. */
 295                                 continue;
 296                 }
 297
 298                 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
 299                         if (usb->address == 0xff)
 300                                 /*
 301                                  * First time we touch this device after FW
 302                                  * upload, so we don't know the address yet.
 303                                  */
 304                                 usb->address = libusb_get_device_address(devlist[i]);
 305                 } else {
 306                         sr_err("Failed to open device: %s.",
 307                                libusb_error_name(ret));
 308                         break;
 309                 }
 310
 311                 if ((ret = logic16_init_device(sdi)) != SR_OK) {
 312                         sr_err("Failed to init device.");
 313                         break;
 314                 }
 315
 316                 sdi->status = SR_ST_ACTIVE;
 317                 sr_info("Opened device %d on %d.%d, interface %d.",
 318                         sdi->index, usb->bus, usb->address, USB_INTERFACE);
 319
 320                 break;
 321         }
 322         libusb_free_device_list(devlist, 1);
 323
 324         if (sdi->status != SR_ST_ACTIVE)
 325                 return SR_ERR;
 326
 327         return SR_OK;
 328 }
 329
 330 static int dev_open(struct sr_dev_inst *sdi)
 331 {
 332         struct sr_usb_dev_inst *usb;
 333         struct dev_context *devc;
 334         int ret;
 335         int64_t timediff_us, timediff_ms;
 336
 337         devc = sdi->priv;
 338         usb = sdi->conn;
 339
 340         /*
 341          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 342          * milliseconds for the FX2 to renumerate.
 343          */
 344         ret = SR_ERR;
 345         if (devc->fw_updated > 0) {
 346                 sr_info("Waiting for device to reset.");
 347                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 348                 g_usleep(300 * 1000);
 349                 timediff_ms = 0;
 350                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 351                         if ((ret = logic16_dev_open(sdi)) == SR_OK)
 352                                 break;
 353                         g_usleep(100 * 1000);
 354
 355                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 356                         timediff_ms = timediff_us / 1000;
 357                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 358                 }
 359                 if (ret != SR_OK) {
 360                         sr_err("Device failed to renumerate.");
 361                         return SR_ERR;
 362                 }
 363                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 364         } else {
 365                 sr_info("Firmware upload was not needed.");
 366                 ret = logic16_dev_open(sdi);
 367         }
 368
 369         if (ret != SR_OK) {
 370                 sr_err("Unable to open device.");
 371                 return SR_ERR;
 372         }
 373
 374         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 375         if (ret != 0) {
 376                 switch (ret) {
 377                 case LIBUSB_ERROR_BUSY:
 378                         sr_err("Unable to claim USB interface. Another "
 379                                "program or driver has already claimed it.");
 380                         break;
 381                 case LIBUSB_ERROR_NO_DEVICE:
 382                         sr_err("Device has been disconnected.");
 383                         break;
 384                 default:
 385                         sr_err("Unable to claim interface: %s.",
 386                                libusb_error_name(ret));
 387                         break;
 388                 }
 389
 390                 return SR_ERR;
 391         }
 392
 393         if (devc->cur_samplerate == 0) {
 394                 /* Samplerate hasn't been set; default to the slowest one. */
 395                 devc->cur_samplerate = samplerates[0];
 396         }
 397
 398         return SR_OK;
 399 }
 400
 401 static int dev_close(struct sr_dev_inst *sdi)
 402 {
 403         struct sr_usb_dev_inst *usb;
 404
 405         usb = sdi->conn;
 406         if (usb->devhdl == NULL)
 407                 return SR_ERR;
 408
 409         sr_info("Closing device %d on %d.%d interface %d.",
 410                 sdi->index, usb->bus, usb->address, USB_INTERFACE);
 411         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 412         libusb_close(usb->devhdl);
 413         usb->devhdl = NULL;
 414         sdi->status = SR_ST_INACTIVE;
 415
 416         return SR_OK;
 417 }
 418
 419 static int cleanup(void)
 420 {
 421         int ret;
 422         struct drv_context *drvc;
 423
 424         if (!(drvc = di->priv))
 425                 /* Can get called on an unused driver, doesn't matter. */
 426                 return SR_OK;
 427
 428         ret = dev_clear();
 429         g_free(drvc);
 430         di->priv = NULL;
 431
 432         return ret;
 433 }
 434
 435 static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
 436 {
 437         struct dev_context *devc;
 438         struct sr_usb_dev_inst *usb;
 439         GVariant *range[2];
 440         char str[128];
 441         int ret;
 442         unsigned int i;
 443
 444         ret = SR_OK;
 445         switch (key) {
 446         case SR_CONF_CONN:
 447                 if (!sdi || !sdi->conn)
 448                         return SR_ERR_ARG;
 449                 usb = sdi->conn;
 450                 if (usb->address == 255)
 451                         /* Device still needs to re-enumerate after firmware
 452                          * upload, so we don't know its (future) address. */
 453                         return SR_ERR;
 454                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 455                 *data = g_variant_new_string(str);
 456                 break;
 457         case SR_CONF_SAMPLERATE:
 458                 if (!sdi)
 459                         return SR_ERR;
 460                 devc = sdi->priv;
 461                 *data = g_variant_new_uint64(devc->cur_samplerate);
 462                 break;
 463         case SR_CONF_VOLTAGE_THRESHOLD:
 464                 if (!sdi)
 465                         return SR_ERR;
 466                 devc = sdi->priv;
 467                 ret = SR_ERR;
 468                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 469                         if (devc->selected_voltage_range !=
 470                             volt_thresholds[i].range)
 471                                 continue;
 472                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 473                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 474                         *data = g_variant_new_tuple(range, 2);
 475                         ret = SR_OK;
 476                         break;
 477                 }
 478                 break;
 479         default:
 480                 return SR_ERR_NA;
 481         }
 482
 483         return ret;
 484 }
 485
 486 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
 487 {
 488         struct dev_context *devc;
 489         gdouble low, high;
 490         int ret;
 491         unsigned int i;
 492
 493         if (sdi->status != SR_ST_ACTIVE)
 494                 return SR_ERR_DEV_CLOSED;
 495
 496         devc = sdi->priv;
 497
 498         ret = SR_OK;
 499         switch (key) {
 500         case SR_CONF_SAMPLERATE:
 501                 devc->cur_samplerate = g_variant_get_uint64(data);
 502                 break;
 503         case SR_CONF_LIMIT_SAMPLES:
 504                 devc->limit_samples = g_variant_get_uint64(data);
 505                 break;
 506         case SR_CONF_VOLTAGE_THRESHOLD:
 507                 g_variant_get(data, "(dd)", &low, &high);
 508                 ret = SR_ERR_ARG;
 509                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 510                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 511                             fabs(volt_thresholds[i].high - high) < 0.1) {
 512                                 devc->selected_voltage_range =
 513                                         volt_thresholds[i].range;
 514                                 ret = SR_OK;
 515                                 break;
 516                         }
 517                 }
 518                 break;
 519         default:
 520                 ret = SR_ERR_NA;
 521         }
 522
 523         return ret;
 524 }
 525
 526 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
 527 {
 528         GVariant *gvar, *range[2];
 529         GVariantBuilder gvb;
 530         int ret;
 531         unsigned int i;
 532
 533         (void)sdi;
 534
 535         ret = SR_OK;
 536         switch (key) {
 537         case SR_CONF_SCAN_OPTIONS:
 538                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 539                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 540                 break;
 541         case SR_CONF_DEVICE_OPTIONS:
 542                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 543                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 544                 break;
 545         case SR_CONF_SAMPLERATE:
 546                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 547                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 548                         samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 549                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 550                 *data = g_variant_builder_end(&gvb);
 551                 break;
 552         case SR_CONF_VOLTAGE_THRESHOLD:
 553                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 554                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 555                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 556                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 557                         gvar = g_variant_new_tuple(range, 2);
 558                         g_variant_builder_add_value(&gvb, gvar);
 559                 }
 560                 *data = g_variant_builder_end(&gvb);
 561                 break;
 562         default:
 563                 return SR_ERR_NA;
 564         }
 565
 566         return ret;
 567 }
 568
 569 static void abort_acquisition(struct dev_context *devc)
 570 {
 571         int i;
 572
 573         devc->num_samples = -1;
 574
 575         for (i = devc->num_transfers - 1; i >= 0; i--) {
 576                 if (devc->transfers[i])
 577                         libusb_cancel_transfer(devc->transfers[i]);
 578         }
 579 }
 580
 581 static unsigned int bytes_per_ms(struct dev_context *devc)
 582 {
 583         return devc->cur_samplerate * devc->num_channels / 8000;
 584 }
 585
 586 static size_t get_buffer_size(struct dev_context *devc)
 587 {
 588         size_t s;
 589
 590         /*
 591          * The buffer should be large enough to hold 10ms of data and
 592          * a multiple of 512.
 593          */
 594         s = 10 * bytes_per_ms(devc);
 595         return (s + 511) & ~511;
 596 }
 597
 598 static unsigned int get_number_of_transfers(struct dev_context *devc)
 599 {
 600         unsigned int n;
 601
 602         /* Total buffer size should be able to hold about 500ms of data. */
 603         n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
 604
 605         if (n > NUM_SIMUL_TRANSFERS)
 606                 return NUM_SIMUL_TRANSFERS;
 607
 608         return n;
 609 }
 610
 611 static unsigned int get_timeout(struct dev_context *devc)
 612 {
 613         size_t total_size;
 614         unsigned int timeout;
 615
 616         total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
 617         timeout = total_size / bytes_per_ms(devc);
 618         return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
 619 }
 620
 621 static int configure_probes(const struct sr_dev_inst *sdi)
 622 {
 623         struct dev_context *devc;
 624         struct sr_probe *probe;
 625         GSList *l;
 626         uint16_t probe_bit;
 627
 628         devc = sdi->priv;
 629
 630         devc->cur_channels = 0;
 631         devc->num_channels = 0;
 632         for (l = sdi->probes; l; l = l->next) {
 633                 probe = (struct sr_probe *)l->data;
 634                 if (probe->enabled == FALSE)
 635                         continue;
 636
 637                 probe_bit = 1 << (probe->index);
 638
 639                 devc->cur_channels |= probe_bit;
 640
 641 #ifdef WORDS_BIGENDIAN
 642                 /*
 643                  * Output logic data should be stored in little endian format.
 644                  * To speed things up during conversion, do the switcharoo
 645                  * here instead.
 646                  */
 647                 probe_bit = 1 << (probe->index ^ 8);
 648 #endif
 649
 650                 devc->channel_masks[devc->num_channels++] = probe_bit;
 651         }
 652
 653         return SR_OK;
 654 }
 655
 656 static int receive_data(int fd, int revents, void *cb_data)
 657 {
 658         struct timeval tv;
 659         struct dev_context *devc;
 660         struct drv_context *drvc;
 661         const struct sr_dev_inst *sdi;
 662
 663         (void)fd;
 664         (void)revents;
 665
 666         sdi = cb_data;
 667         drvc = di->priv;
 668         devc = sdi->priv;
 669
 670         tv.tv_sec = tv.tv_usec = 0;
 671         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 672
 673         if (devc->num_samples == -2) {
 674                 logic16_abort_acquisition(sdi);
 675                 abort_acquisition(devc);
 676         }
 677
 678         return TRUE;
 679 }
 680
 681 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 682 {
 683         struct dev_context *devc;
 684         struct drv_context *drvc;
 685         struct sr_usb_dev_inst *usb;
 686         struct libusb_transfer *transfer;
 687         const struct libusb_pollfd **lupfd;
 688         unsigned int i, timeout, num_transfers;
 689         int ret;
 690         unsigned char *buf;
 691         size_t size, convsize;
 692
 693         if (sdi->status != SR_ST_ACTIVE)
 694                 return SR_ERR_DEV_CLOSED;
 695
 696         drvc = di->priv;
 697         devc = sdi->priv;
 698         usb = sdi->conn;
 699
 700         /* Configures devc->cur_channels. */
 701         if (configure_probes(sdi) != SR_OK) {
 702                 sr_err("Failed to configure probes.");
 703                 return SR_ERR;
 704         }
 705
 706         devc->cb_data = cb_data;
 707         devc->num_samples = 0;
 708         devc->empty_transfer_count = 0;
 709         devc->cur_channel = 0;
 710         memset(devc->channel_data, 0, sizeof(devc->channel_data));
 711
 712         timeout = get_timeout(devc);
 713         num_transfers = get_number_of_transfers(devc);
 714         size = get_buffer_size(devc);
 715         convsize = (size / devc->num_channels + 2) * 16;
 716         devc->submitted_transfers = 0;
 717         devc->usbfd = NULL;
 718
 719         devc->convbuffer_size = convsize;
 720         if (!(devc->convbuffer = g_try_malloc(convsize))) {
 721                 sr_err("Conversion buffer malloc failed.");
 722                 return SR_ERR_MALLOC;
 723         }
 724
 725         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 726         if (!devc->transfers) {
 727                 sr_err("USB transfers malloc failed.");
 728                 g_free(devc->convbuffer);
 729                 return SR_ERR_MALLOC;
 730         }
 731
 732         if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
 733                                              devc->cur_channels)) != SR_OK) {
 734                 g_free(devc->transfers);
 735                 g_free(devc->convbuffer);
 736                 return ret;
 737         }
 738
 739         devc->num_transfers = num_transfers;
 740         for (i = 0; i < num_transfers; i++) {
 741                 if (!(buf = g_try_malloc(size))) {
 742                         sr_err("USB transfer buffer malloc failed.");
 743                         if (devc->submitted_transfers)
 744                                 abort_acquisition(devc);
 745                         else {
 746                                 g_free(devc->transfers);
 747                                 g_free(devc->convbuffer);
 748                         }
 749                         return SR_ERR_MALLOC;
 750                 }
 751                 transfer = libusb_alloc_transfer(0);
 752                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 753                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 754                                 logic16_receive_transfer, devc, timeout);
 755                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 756                         sr_err("Failed to submit transfer: %s.",
 757                                libusb_error_name(ret));
 758                         libusb_free_transfer(transfer);
 759                         g_free(buf);
 760                         abort_acquisition(devc);
 761                         return SR_ERR;
 762                 }
 763                 devc->transfers[i] = transfer;
 764                 devc->submitted_transfers++;
 765         }
 766
 767         lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
 768         for (i = 0; lupfd[i]; i++);
 769         devc->usbfd = g_try_malloc(sizeof(struct libusb_pollfd) * (i + 1));
 770         if (!devc->usbfd) {
 771                 abort_acquisition(devc);
 772                 free(lupfd);
 773                 return SR_ERR;
 774         }
 775         for (i = 0; lupfd[i]; i++) {
 776                 sr_source_add(lupfd[i]->fd, lupfd[i]->events,
 777                               timeout, receive_data, (void *)sdi);
 778                 devc->usbfd[i] = lupfd[i]->fd;
 779         }
 780         devc->usbfd[i] = -1;
 781         free(lupfd);
 782
 783         /* Send header packet to the session bus. */
 784         std_session_send_df_header(cb_data, LOG_PREFIX);
 785
 786         if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
 787                 abort_acquisition(devc);
 788                 return ret;
 789         }
 790
 791         return SR_OK;
 792 }
 793
 794 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 795 {
 796         int ret;
 797
 798         (void)cb_data;
 799
 800         if (sdi->status != SR_ST_ACTIVE)
 801                 return SR_ERR_DEV_CLOSED;
 802
 803         ret = logic16_abort_acquisition(sdi);
 804
 805         abort_acquisition(sdi->priv);
 806
 807         return ret;
 808 }
 809
 810 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = {
 811         .name = "saleae-logic16",
 812         .longname = "Saleae Logic16",
 813         .api_version = 1,
 814         .init = init,
 815         .cleanup = cleanup,
 816         .scan = scan,
 817         .dev_list = dev_list,
 818         .dev_clear = dev_clear,
 819         .config_get = config_get,
 820         .config_set = config_set,
 821         .config_list = config_list,
 822         .dev_open = dev_open,
 823         .dev_close = dev_close,
 824         .dev_acquisition_start = dev_acquisition_start,
 825         .dev_acquisition_stop = dev_acquisition_stop,
 826         .priv = NULL,
 827 };