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  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <glib.h>
  21 #include <libusb.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <math.h>
  25 #include "libsigrok.h"
  26 #include "libsigrok-internal.h"
  27 #include "protocol.h"
  28
  29 #define LOGIC16_VID 0x21a9
  30 #define LOGIC16_PID 0x1001
  31 #define NUM_PROBES  16
  32
  33 #define USB_INTERFACE           0
  34 #define USB_CONFIGURATION       1
  35 #define FX2_FIRMWARE            FIRMWARE_DIR "/saleae-logic16-fx2.fw"
  36
  37 #define MAX_RENUM_DELAY_MS      3000
  38 #define NUM_SIMUL_TRANSFERS     32
  39
  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[NUM_PROBES + 1] = {
  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(libusb_get_bus_number(devlist[i]),
 217                                                         libusb_get_device_address(devlist[i]), NULL);
 218                 } else {
 219                         if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 220                                                   FX2_FIRMWARE) == SR_OK)
 221                                 /* Store when this device's FW was updated. */
 222                                 devc->fw_updated = g_get_monotonic_time();
 223                         else
 224                                 sr_err("Firmware upload failed for "
 225                                        "device %d.", devcnt);
 226                         sdi->inst_type = SR_INST_USB;
 227                         sdi->conn = sr_usb_dev_inst_new (libusb_get_bus_number(devlist[i]),
 228                                                          0xff, NULL);
 229                 }
 230         }
 231         libusb_free_device_list(devlist, 1);
 232         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 233
 234         return devices;
 235 }
 236
 237 static GSList *dev_list(void)
 238 {
 239         struct drv_context *drvc;
 240
 241         drvc = di->priv;
 242
 243         return drvc->instances;
 244 }
 245
 246 static int dev_clear(void)
 247 {
 248         return std_dev_clear(di, NULL);
 249 }
 250
 251 static int logic16_dev_open(struct sr_dev_inst *sdi)
 252 {
 253         libusb_device **devlist;
 254         struct sr_usb_dev_inst *usb;
 255         struct libusb_device_descriptor des;
 256         struct drv_context *drvc;
 257         int ret, skip, i, device_count;
 258
 259         drvc = di->priv;
 260         usb = sdi->conn;
 261
 262         if (sdi->status == SR_ST_ACTIVE)
 263                 /* Device is already in use. */
 264                 return SR_ERR;
 265
 266         skip = 0;
 267         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 268         if (device_count < 0) {
 269                 sr_err("Failed to get device list: %s.",
 270                        libusb_error_name(device_count));
 271                 return SR_ERR;
 272         }
 273
 274         for (i = 0; i < device_count; i++) {
 275                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 276                         sr_err("Failed to get device descriptor: %s.",
 277                                libusb_error_name(ret));
 278                         continue;
 279                 }
 280
 281                 if (des.idVendor != LOGIC16_VID
 282                     || des.idProduct != LOGIC16_PID)
 283                         continue;
 284
 285                 if (sdi->status == SR_ST_INITIALIZING) {
 286                         if (skip != sdi->index) {
 287                                 /* Skip devices of this type that aren't the one we want. */
 288                                 skip += 1;
 289                                 continue;
 290                         }
 291                 } else if (sdi->status == SR_ST_INACTIVE) {
 292                         /*
 293                          * This device is fully enumerated, so we need to find
 294                          * this device by vendor, product, bus and address.
 295                          */
 296                         if (libusb_get_bus_number(devlist[i]) != usb->bus
 297                                 || libusb_get_device_address(devlist[i]) != usb->address)
 298                                 /* This is not the one. */
 299                                 continue;
 300                 }
 301
 302                 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
 303                         if (usb->address == 0xff)
 304                                 /*
 305                                  * First time we touch this device after FW
 306                                  * upload, so we don't know the address yet.
 307                                  */
 308                                 usb->address = libusb_get_device_address(devlist[i]);
 309                 } else {
 310                         sr_err("Failed to open device: %s.",
 311                                libusb_error_name(ret));
 312                         break;
 313                 }
 314
 315                 if ((ret = saleae_logic16_init_device(sdi)) != SR_OK) {
 316                         sr_err("Failed to init device.");
 317                         break;
 318                 }
 319
 320                 sdi->status = SR_ST_ACTIVE;
 321                 sr_info("Opened device %d on %d.%d, "
 322                         "interface %d.",
 323                         sdi->index, usb->bus, usb->address,
 324                         USB_INTERFACE);
 325
 326                 break;
 327         }
 328         libusb_free_device_list(devlist, 1);
 329
 330         if (sdi->status != SR_ST_ACTIVE)
 331                 return SR_ERR;
 332
 333         return SR_OK;
 334 }
 335
 336 static int dev_open(struct sr_dev_inst *sdi)
 337 {
 338         struct sr_usb_dev_inst *usb;
 339         struct dev_context *devc;
 340         int ret;
 341         int64_t timediff_us, timediff_ms;
 342
 343         devc = sdi->priv;
 344         usb = sdi->conn;
 345
 346         /*
 347          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 348          * milliseconds for the FX2 to renumerate.
 349          */
 350         ret = SR_ERR;
 351         if (devc->fw_updated > 0) {
 352                 sr_info("Waiting for device to reset.");
 353                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 354                 g_usleep(300 * 1000);
 355                 timediff_ms = 0;
 356                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 357                         if ((ret = logic16_dev_open(sdi)) == SR_OK)
 358                                 break;
 359                         g_usleep(100 * 1000);
 360
 361                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 362                         timediff_ms = timediff_us / 1000;
 363                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 364                 }
 365                 if (ret != SR_OK) {
 366                         sr_err("Device failed to renumerate.");
 367                         return SR_ERR;
 368                 }
 369                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 370         } else {
 371                 sr_info("Firmware upload was not needed.");
 372                 ret = logic16_dev_open(sdi);
 373         }
 374
 375         if (ret != SR_OK) {
 376                 sr_err("Unable to open device.");
 377                 return SR_ERR;
 378         }
 379
 380         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 381         if (ret != 0) {
 382                 switch(ret) {
 383                 case LIBUSB_ERROR_BUSY:
 384                         sr_err("Unable to claim USB interface. Another "
 385                                "program or driver has already claimed it.");
 386                         break;
 387                 case LIBUSB_ERROR_NO_DEVICE:
 388                         sr_err("Device has been disconnected.");
 389                         break;
 390                 default:
 391                         sr_err("Unable to claim interface: %s.",
 392                                libusb_error_name(ret));
 393                         break;
 394                 }
 395
 396                 return SR_ERR;
 397         }
 398
 399         if (devc->cur_samplerate == 0) {
 400                 /* Samplerate hasn't been set; default to the slowest one. */
 401                 devc->cur_samplerate = samplerates[0];
 402         }
 403
 404         return SR_OK;
 405 }
 406
 407 static int dev_close(struct sr_dev_inst *sdi)
 408 {
 409         struct sr_usb_dev_inst *usb;
 410
 411         usb = sdi->conn;
 412         if (usb->devhdl == NULL)
 413                 return SR_ERR;
 414
 415         sr_info("Closing device %d on %d.%d interface %d.",
 416                 sdi->index, usb->bus, usb->address, USB_INTERFACE);
 417         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 418         libusb_close(usb->devhdl);
 419         usb->devhdl = NULL;
 420         sdi->status = SR_ST_INACTIVE;
 421
 422         return SR_OK;
 423 }
 424
 425 static int cleanup(void)
 426 {
 427         int ret;
 428         struct drv_context *drvc;
 429
 430         if (!(drvc = di->priv))
 431                 /* Can get called on an unused driver, doesn't matter. */
 432                 return SR_OK;
 433
 434         ret = dev_clear();
 435         g_free(drvc);
 436         di->priv = NULL;
 437
 438         return ret;
 439 }
 440
 441 static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
 442 {
 443         struct dev_context *devc;
 444         struct sr_usb_dev_inst *usb;
 445         GVariant *range[2];
 446         char str[128];
 447         int ret;
 448         unsigned i;
 449
 450         ret = SR_OK;
 451         switch (key) {
 452         case SR_CONF_CONN:
 453                 if (!sdi || !sdi->conn)
 454                         return SR_ERR_ARG;
 455                 usb = sdi->conn;
 456                 if (usb->address == 255)
 457                         /* Device still needs to re-enumerate after firmware
 458                          * upload, so we don't know its (future) address. */
 459                         return SR_ERR;
 460                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 461                 *data = g_variant_new_string(str);
 462                 break;
 463         case SR_CONF_SAMPLERATE:
 464                 if (!sdi)
 465                         return SR_ERR;
 466                 devc = sdi->priv;
 467                 *data = g_variant_new_uint64(devc->cur_samplerate);
 468                 break;
 469         case SR_CONF_VOLTAGE_THRESHOLD:
 470                 if (!sdi)
 471                         return SR_ERR;
 472                 devc = sdi->priv;
 473                 ret = SR_ERR;
 474                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++)
 475                         if (devc->selected_voltage_range ==
 476                             volt_thresholds[i].range) {
 477                                 range[0] = g_variant_new_double(volt_thresholds[i].low);
 478                                 range[1] = g_variant_new_double(volt_thresholds[i].high);
 479                                 *data = g_variant_new_tuple(range, 2);
 480                                 ret = SR_OK;
 481                                 break;
 482                         }
 483                 break;
 484         default:
 485                 return SR_ERR_NA;
 486         }
 487
 488         return ret;
 489 }
 490
 491 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
 492 {
 493         struct dev_context *devc;
 494         gdouble low, high;
 495         int ret;
 496         unsigned i;
 497
 498         if (sdi->status != SR_ST_ACTIVE)
 499                 return SR_ERR_DEV_CLOSED;
 500
 501         devc = sdi->priv;
 502
 503         ret = SR_OK;
 504         switch (key) {
 505         case SR_CONF_SAMPLERATE:
 506                 devc->cur_samplerate = g_variant_get_uint64(data);
 507                 break;
 508         case SR_CONF_LIMIT_SAMPLES:
 509                 devc->limit_samples = g_variant_get_uint64(data);
 510                 break;
 511         case SR_CONF_VOLTAGE_THRESHOLD:
 512                 g_variant_get(data, "(dd)", &low, &high);
 513                 ret = SR_ERR_ARG;
 514                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 515                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 516                             fabs(volt_thresholds[i].high - high) < 0.1) {
 517                                 devc->selected_voltage_range =
 518                                         volt_thresholds[i].range;
 519                                 ret = SR_OK;
 520                                 break;
 521                         }
 522                 }
 523                 break;
 524         default:
 525                 ret = SR_ERR_NA;
 526         }
 527
 528         return ret;
 529 }
 530
 531 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
 532 {
 533         GVariant *gvar, *range[2];
 534         GVariantBuilder gvb;
 535         int ret;
 536         unsigned i;
 537
 538         (void)sdi;
 539
 540         ret = SR_OK;
 541         switch (key) {
 542         case SR_CONF_SCAN_OPTIONS:
 543                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 544                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 545                 break;
 546         case SR_CONF_DEVICE_OPTIONS:
 547                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 548                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 549                 break;
 550         case SR_CONF_SAMPLERATE:
 551                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 552                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 553                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 554                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 555                 *data = g_variant_builder_end(&gvb);
 556                 break;
 557         case SR_CONF_VOLTAGE_THRESHOLD:
 558                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 559                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 560                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 561                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 562                         gvar = g_variant_new_tuple(range, 2);
 563                         g_variant_builder_add_value(&gvb, gvar);
 564                 }
 565                 *data = g_variant_builder_end(&gvb);
 566                 break;
 567         default:
 568                 return SR_ERR_NA;
 569         }
 570
 571         return ret;
 572 }
 573
 574 static void abort_acquisition(struct dev_context *devc)
 575 {
 576         int i;
 577
 578         devc->num_samples = -1;
 579
 580         for (i = devc->num_transfers - 1; i >= 0; i--) {
 581                 if (devc->transfers[i])
 582                         libusb_cancel_transfer(devc->transfers[i]);
 583         }
 584 }
 585
 586 static unsigned int bytes_per_ms(struct dev_context *devc)
 587 {
 588         return devc->cur_samplerate * devc->num_channels / 8000;
 589 }
 590
 591 static size_t get_buffer_size(struct dev_context *devc)
 592 {
 593         size_t s;
 594
 595         /*
 596          * The buffer should be large enough to hold 10ms of data and
 597          * a multiple of 512.
 598          */
 599         s = 10 * bytes_per_ms(devc);
 600         return (s + 511) & ~511;
 601 }
 602
 603 static unsigned int get_number_of_transfers(struct dev_context *devc)
 604 {
 605         unsigned int n;
 606
 607         /* Total buffer size should be able to hold about 500ms of data. */
 608         n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
 609
 610         if (n > NUM_SIMUL_TRANSFERS)
 611                 return NUM_SIMUL_TRANSFERS;
 612
 613         return n;
 614 }
 615
 616 static unsigned int get_timeout(struct dev_context *devc)
 617 {
 618         size_t total_size;
 619         unsigned int timeout;
 620
 621         total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
 622         timeout = total_size / bytes_per_ms(devc);
 623         return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
 624 }
 625
 626 static int configure_probes(const struct sr_dev_inst *sdi)
 627 {
 628         struct dev_context *devc;
 629         struct sr_probe *probe;
 630         GSList *l;
 631         uint16_t probe_bit;
 632
 633         devc = sdi->priv;
 634
 635         devc->cur_channels = 0;
 636         devc->num_channels = 0;
 637         for (l = sdi->probes; l; l = l->next) {
 638                 probe = (struct sr_probe *)l->data;
 639                 if (probe->enabled == FALSE)
 640                         continue;
 641
 642                 probe_bit = 1 << (probe->index);
 643
 644                 devc->cur_channels |= probe_bit;
 645
 646 #ifdef WORDS_BIGENDIAN
 647                 /* Output logic data should be stored in little endian
 648                    format.  To speed things up during conversion, do the
 649                    switcharoo here instead. */
 650
 651                 probe_bit = 1 << (probe->index ^ 8);
 652 #endif
 653
 654                 devc->channel_masks[devc->num_channels ++] = probe_bit;
 655         }
 656
 657         return SR_OK;
 658 }
 659
 660 static int receive_data(int fd, int revents, void *cb_data)
 661 {
 662         struct timeval tv;
 663         struct dev_context *devc;
 664         struct drv_context *drvc;
 665         const struct sr_dev_inst *sdi;
 666
 667         (void)fd;
 668         (void)revents;
 669
 670         sdi = cb_data;
 671         drvc = di->priv;
 672         devc = sdi->priv;
 673
 674         tv.tv_sec = tv.tv_usec = 0;
 675         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 676
 677         if (devc->num_samples == -2) {
 678                 saleae_logic16_abort_acquisition(sdi);
 679                 abort_acquisition(devc);
 680         }
 681
 682         return TRUE;
 683 }
 684
 685 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 686                                  void *cb_data)
 687 {
 688         struct dev_context *devc;
 689         struct drv_context *drvc;
 690         struct sr_usb_dev_inst *usb;
 691         struct libusb_transfer *transfer;
 692         const struct libusb_pollfd **lupfd;
 693         unsigned int i, timeout, num_transfers;
 694         int ret;
 695         unsigned char *buf;
 696         size_t size, convsize;
 697
 698         if (sdi->status != SR_ST_ACTIVE)
 699                 return SR_ERR_DEV_CLOSED;
 700
 701         drvc = di->priv;
 702         devc = sdi->priv;
 703         usb = sdi->conn;
 704
 705         /* Configures devc->cur_channels */
 706         if (configure_probes(sdi) != SR_OK) {
 707                 sr_err("Failed to configure probes.");
 708                 return SR_ERR;
 709         }
 710
 711         devc->cb_data = cb_data;
 712         devc->num_samples = 0;
 713         devc->empty_transfer_count = 0;
 714         devc->cur_channel = 0;
 715         memset(devc->channel_data, 0, sizeof(devc->channel_data));
 716
 717         timeout = get_timeout(devc);
 718         num_transfers = get_number_of_transfers(devc);
 719         size = get_buffer_size(devc);
 720         convsize = (size / devc->num_channels + 2) * 16;
 721         devc->submitted_transfers = 0;
 722         devc->usbfd = NULL;
 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 = saleae_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                                 saleae_logic16_receive_transfer, devc, 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         lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
 773         for (i = 0; lupfd[i]; i++);
 774         if (!(devc->usbfd = g_try_malloc(sizeof(struct libusb_pollfd) * (i + 1)))) {
 775                 abort_acquisition(devc);
 776                 free(lupfd);
 777                 return SR_ERR;
 778         }
 779         for (i = 0; lupfd[i]; i++) {
 780                 sr_source_add(lupfd[i]->fd, lupfd[i]->events,
 781                               timeout, receive_data, (void *)sdi);
 782                 devc->usbfd[i] = lupfd[i]->fd;
 783         }
 784         devc->usbfd[i] = -1;
 785         free(lupfd);
 786
 787         /* Send header packet to the session bus. */
 788         std_session_send_df_header(cb_data, LOG_PREFIX);
 789
 790         if ((ret = saleae_logic16_start_acquisition(sdi)) != SR_OK) {
 791                 abort_acquisition(devc);
 792                 return ret;
 793         }
 794
 795         return SR_OK;
 796 }
 797
 798 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 799 {
 800         int ret;
 801
 802         (void)cb_data;
 803
 804         if (sdi->status != SR_ST_ACTIVE)
 805                 return SR_ERR_DEV_CLOSED;
 806
 807         ret = saleae_logic16_abort_acquisition(sdi);
 808
 809         abort_acquisition(sdi->priv);
 810
 811         return ret;
 812 }
 813
 814 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = {
 815         .name = "saleae-logic16",
 816         .longname = "Saleae Logic16",
 817         .api_version = 1,
 818         .init = init,
 819         .cleanup = cleanup,
 820         .scan = scan,
 821         .dev_list = dev_list,
 822         .dev_clear = dev_clear,
 823         .config_get = config_get,
 824         .config_set = config_set,
 825         .config_list = config_list,
 826         .dev_open = dev_open,
 827         .dev_close = dev_close,
 828         .dev_acquisition_start = dev_acquisition_start,
 829         .dev_acquisition_stop = dev_acquisition_stop,
 830         .priv = NULL,
 831 };