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 <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
  43 static const uint32_t scanopts[] = {
  44         SR_CONF_CONN,
  45 };
  46
  47 static const uint32_t devopts[] = {
  48         SR_CONF_LOGIC_ANALYZER,
  49         SR_CONF_CONTINUOUS,
  50         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  51         SR_CONF_CONN | SR_CONF_GET,
  52         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  53         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  54         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  55         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  56 };
  57
  58 static const int32_t soft_trigger_matches[] = {
  59         SR_TRIGGER_ZERO,
  60         SR_TRIGGER_ONE,
  61         SR_TRIGGER_RISING,
  62         SR_TRIGGER_FALLING,
  63         SR_TRIGGER_EDGE,
  64 };
  65
  66 static const char *channel_names[] = {
  67         "0", "1", "2", "3", "4", "5", "6", "7", "8",
  68         "9", "10", "11", "12", "13", "14", "15",
  69 };
  70
  71 static const struct {
  72         enum voltage_range range;
  73         gdouble low;
  74         gdouble high;
  75 } volt_thresholds[] = {
  76         { VOLTAGE_RANGE_18_33_V, 0.7, 1.4 },
  77         { VOLTAGE_RANGE_5_V,     1.4, 3.6 },
  78 };
  79
  80 static const uint64_t samplerates[] = {
  81         SR_KHZ(500),
  82         SR_MHZ(1),
  83         SR_MHZ(2),
  84         SR_MHZ(4),
  85         SR_MHZ(5),
  86         SR_MHZ(8),
  87         SR_MHZ(10),
  88         SR_KHZ(12500),
  89         SR_MHZ(16),
  90         SR_MHZ(25),
  91         SR_MHZ(32),
  92         SR_MHZ(40),
  93         SR_MHZ(80),
  94         SR_MHZ(100),
  95 };
  96
  97 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  98 {
  99         return std_init(sr_ctx, di, LOG_PREFIX);
 100 }
 101
 102 static gboolean check_conf_profile(libusb_device *dev)
 103 {
 104         struct libusb_device_descriptor des;
 105         struct libusb_device_handle *hdl;
 106         gboolean ret;
 107         unsigned char strdesc[64];
 108
 109         hdl = NULL;
 110         ret = FALSE;
 111         while (!ret) {
 112                 /* Assume the FW has not been loaded, unless proven wrong. */
 113                 if (libusb_get_device_descriptor(dev, &des) != 0)
 114                         break;
 115
 116                 if (libusb_open(dev, &hdl) != 0)
 117                         break;
 118
 119                 if (libusb_get_string_descriptor_ascii(hdl,
 120                     des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
 121                         break;
 122                 if (strcmp((const char *)strdesc, "Saleae LLC"))
 123                         break;
 124
 125                 if (libusb_get_string_descriptor_ascii(hdl,
 126                     des.iProduct, strdesc, sizeof(strdesc)) < 0)
 127                         break;
 128                 if (strcmp((const char *)strdesc, "Logic S/16"))
 129                         break;
 130
 131                 /* If we made it here, it must be a configured Logic16. */
 132                 ret = TRUE;
 133         }
 134         if (hdl)
 135                 libusb_close(hdl);
 136
 137         return ret;
 138 }
 139
 140 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 141 {
 142         struct drv_context *drvc;
 143         struct dev_context *devc;
 144         struct sr_dev_inst *sdi;
 145         struct sr_usb_dev_inst *usb;
 146         struct sr_config *src;
 147         GSList *l, *devices, *conn_devices;
 148         struct libusb_device_descriptor des;
 149         libusb_device **devlist;
 150         int ret;
 151         unsigned int i, j;
 152         const char *conn;
 153         char connection_id[64];
 154
 155         drvc = di->context;
 156
 157         conn = NULL;
 158         for (l = options; l; l = l->next) {
 159                 src = l->data;
 160                 switch (src->key) {
 161                 case SR_CONF_CONN:
 162                         conn = g_variant_get_string(src->data, NULL);
 163                         break;
 164                 }
 165         }
 166         if (conn)
 167                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 168         else
 169                 conn_devices = NULL;
 170
 171         /* Find all Logic16 devices and upload firmware to them. */
 172         devices = NULL;
 173         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 174         for (i = 0; devlist[i]; i++) {
 175                 if (conn) {
 176                         usb = NULL;
 177                         for (l = conn_devices; l; l = l->next) {
 178                                 usb = l->data;
 179                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 180                                     && usb->address == libusb_get_device_address(devlist[i]))
 181                                         break;
 182                         }
 183                         if (!l)
 184                                 /* This device matched none of the ones that
 185                                  * matched the conn specification. */
 186                                 continue;
 187                 }
 188
 189                 if ((ret = libusb_get_device_descriptor(devlist[i], &des)) != 0) {
 190                         sr_warn("Failed to get device descriptor: %s.",
 191                                 libusb_error_name(ret));
 192                         continue;
 193                 }
 194
 195                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 196
 197                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 198                         continue;
 199
 200                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 201                 sdi->status = SR_ST_INITIALIZING;
 202                 sdi->vendor = g_strdup("Saleae");
 203                 sdi->model = g_strdup("Logic16");
 204                 sdi->driver = di;
 205                 sdi->connection_id = g_strdup(connection_id);
 206
 207                 for (j = 0; j < ARRAY_SIZE(channel_names); j++)
 208                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 209                                             channel_names[j]);
 210
 211                 devc = g_malloc0(sizeof(struct dev_context));
 212                 devc->selected_voltage_range = VOLTAGE_RANGE_18_33_V;
 213                 sdi->priv = devc;
 214                 drvc->instances = g_slist_append(drvc->instances, sdi);
 215                 devices = g_slist_append(devices, sdi);
 216
 217                 if (check_conf_profile(devlist[i])) {
 218                         /* Already has the firmware, so fix the new address. */
 219                         sr_dbg("Found a Logic16 device.");
 220                         sdi->status = SR_ST_INACTIVE;
 221                         sdi->inst_type = SR_INST_USB;
 222                         sdi->conn = sr_usb_dev_inst_new(
 223                                 libusb_get_bus_number(devlist[i]),
 224                                 libusb_get_device_address(devlist[i]), NULL);
 225                 } else {
 226                         if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 227                                                   FX2_FIRMWARE) == SR_OK)
 228                                 /* Store when this device's FW was updated. */
 229                                 devc->fw_updated = g_get_monotonic_time();
 230                         else
 231                                 sr_err("Firmware upload failed.");
 232                         sdi->inst_type = SR_INST_USB;
 233                         sdi->conn = sr_usb_dev_inst_new(
 234                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 235                 }
 236         }
 237         libusb_free_device_list(devlist, 1);
 238         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 239
 240         return devices;
 241 }
 242
 243 static GSList *dev_list(const struct sr_dev_driver *di)
 244 {
 245         return ((struct drv_context *)(di->context))->instances;
 246 }
 247
 248 static int logic16_dev_open(struct sr_dev_inst *sdi)
 249 {
 250         struct sr_dev_driver *di;
 251         libusb_device **devlist;
 252         struct sr_usb_dev_inst *usb;
 253         struct libusb_device_descriptor des;
 254         struct drv_context *drvc;
 255         int ret, i, device_count;
 256         char connection_id[64];
 257
 258         di = sdi->driver;
 259         drvc = di->context;
 260         usb = sdi->conn;
 261
 262         if (sdi->status == SR_ST_ACTIVE)
 263                 /* Device is already in use. */
 264                 return SR_ERR;
 265
 266         device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 267         if (device_count < 0) {
 268                 sr_err("Failed to get device list: %s.",
 269                        libusb_error_name(device_count));
 270                 return SR_ERR;
 271         }
 272
 273         for (i = 0; i < device_count; i++) {
 274                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 275                         sr_err("Failed to get device descriptor: %s.",
 276                                libusb_error_name(ret));
 277                         continue;
 278                 }
 279
 280                 if (des.idVendor != LOGIC16_VID || des.idProduct != LOGIC16_PID)
 281                         continue;
 282
 283                 if ((sdi->status == SR_ST_INITIALIZING) ||
 284                                 (sdi->status == SR_ST_INACTIVE)) {
 285                         /*
 286                          * Check device by its physical USB bus/port address.
 287                          */
 288                         usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 289                         if (strcmp(sdi->connection_id, connection_id))
 290                                 /* This is not the one. */
 291                                 continue;
 292                 }
 293
 294                 if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
 295                         if (usb->address == 0xff)
 296                                 /*
 297                                  * First time we touch this device after FW
 298                                  * upload, so we don't know the address yet.
 299                                  */
 300                                 usb->address = libusb_get_device_address(devlist[i]);
 301                 } else {
 302                         sr_err("Failed to open device: %s.",
 303                                libusb_error_name(ret));
 304                         break;
 305                 }
 306
 307                 ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 308                 if (ret == LIBUSB_ERROR_BUSY) {
 309                         sr_err("Unable to claim USB interface. Another "
 310                                "program or driver has already claimed it.");
 311                         break;
 312                 } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 313                         sr_err("Device has been disconnected.");
 314                         break;
 315                 } else if (ret != 0) {
 316                         sr_err("Unable to claim interface: %s.",
 317                                libusb_error_name(ret));
 318                         break;
 319                 }
 320
 321                 if ((ret = logic16_init_device(sdi)) != SR_OK) {
 322                         sr_err("Failed to init device.");
 323                         break;
 324                 }
 325
 326                 sdi->status = SR_ST_ACTIVE;
 327                 sr_info("Opened device on %d.%d (logical) / %s (physical), interface %d.",
 328                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 329
 330                 break;
 331         }
 332         libusb_free_device_list(devlist, 1);
 333
 334         if (sdi->status != SR_ST_ACTIVE) {
 335                 if (usb->devhdl) {
 336                         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 337                         libusb_close(usb->devhdl);
 338                         usb->devhdl = NULL;
 339                 }
 340                 return SR_ERR;
 341         }
 342
 343         return SR_OK;
 344 }
 345
 346 static int dev_open(struct sr_dev_inst *sdi)
 347 {
 348         struct dev_context *devc;
 349         int ret;
 350         int64_t timediff_us, timediff_ms;
 351
 352         devc = sdi->priv;
 353
 354         /*
 355          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 356          * milliseconds for the FX2 to renumerate.
 357          */
 358         ret = SR_ERR;
 359         if (devc->fw_updated > 0) {
 360                 sr_info("Waiting for device to reset.");
 361                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 362                 g_usleep(300 * 1000);
 363                 timediff_ms = 0;
 364                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 365                         if ((ret = logic16_dev_open(sdi)) == SR_OK)
 366                                 break;
 367                         g_usleep(100 * 1000);
 368
 369                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 370                         timediff_ms = timediff_us / 1000;
 371                         sr_spew("Waited %" PRIi64 "ms.", timediff_ms);
 372                 }
 373                 if (ret != SR_OK) {
 374                         sr_err("Device failed to renumerate.");
 375                         return SR_ERR;
 376                 }
 377                 sr_info("Device came back after %" PRIi64 "ms.", timediff_ms);
 378         } else {
 379                 sr_info("Firmware upload was not needed.");
 380                 ret = logic16_dev_open(sdi);
 381         }
 382
 383         if (ret != SR_OK) {
 384                 sr_err("Unable to open device.");
 385                 return SR_ERR;
 386         }
 387
 388         if (devc->cur_samplerate == 0) {
 389                 /* Samplerate hasn't been set; default to the slowest one. */
 390                 devc->cur_samplerate = samplerates[0];
 391         }
 392
 393         return SR_OK;
 394 }
 395
 396 static int dev_close(struct sr_dev_inst *sdi)
 397 {
 398         struct sr_usb_dev_inst *usb;
 399
 400         usb = sdi->conn;
 401         if (!usb->devhdl)
 402                 return SR_ERR;
 403
 404         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 405                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 406         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 407         libusb_close(usb->devhdl);
 408         usb->devhdl = NULL;
 409         sdi->status = SR_ST_INACTIVE;
 410
 411         return SR_OK;
 412 }
 413
 414 static int cleanup(const struct sr_dev_driver *di)
 415 {
 416         int ret;
 417         struct drv_context *drvc;
 418
 419         if (!(drvc = di->context))
 420                 /* Can get called on an unused driver, doesn't matter. */
 421                 return SR_OK;
 422
 423         ret = std_dev_clear(di, NULL);
 424         g_free(drvc);
 425
 426         return ret;
 427 }
 428
 429 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 430                 const struct sr_channel_group *cg)
 431 {
 432         struct dev_context *devc;
 433         struct sr_usb_dev_inst *usb;
 434         GVariant *range[2];
 435         char str[128];
 436         int ret;
 437         unsigned int i;
 438
 439         (void)cg;
 440
 441         ret = SR_OK;
 442         switch (key) {
 443         case SR_CONF_CONN:
 444                 if (!sdi || !sdi->conn)
 445                         return SR_ERR_ARG;
 446                 usb = sdi->conn;
 447                 if (usb->address == 255)
 448                         /* Device still needs to re-enumerate after firmware
 449                          * upload, so we don't know its (future) address. */
 450                         return SR_ERR;
 451                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 452                 *data = g_variant_new_string(str);
 453                 break;
 454         case SR_CONF_SAMPLERATE:
 455                 if (!sdi)
 456                         return SR_ERR;
 457                 devc = sdi->priv;
 458                 *data = g_variant_new_uint64(devc->cur_samplerate);
 459                 break;
 460         case SR_CONF_CAPTURE_RATIO:
 461                 if (!sdi)
 462                         return SR_ERR;
 463                 devc = sdi->priv;
 464                 *data = g_variant_new_uint64(devc->capture_ratio);
 465                 break;
 466         case SR_CONF_VOLTAGE_THRESHOLD:
 467                 if (!sdi)
 468                         return SR_ERR;
 469                 devc = sdi->priv;
 470                 ret = SR_ERR;
 471                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 472                         if (devc->selected_voltage_range !=
 473                             volt_thresholds[i].range)
 474                                 continue;
 475                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 476                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 477                         *data = g_variant_new_tuple(range, 2);
 478                         ret = SR_OK;
 479                         break;
 480                 }
 481                 break;
 482         default:
 483                 return SR_ERR_NA;
 484         }
 485
 486         return ret;
 487 }
 488
 489 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 490                 const struct sr_channel_group *cg)
 491 {
 492         struct dev_context *devc;
 493         gdouble low, high;
 494         int ret;
 495         unsigned int i;
 496
 497         (void)cg;
 498
 499         if (sdi->status != SR_ST_ACTIVE)
 500                 return SR_ERR_DEV_CLOSED;
 501
 502         devc = sdi->priv;
 503
 504         ret = SR_OK;
 505         switch (key) {
 506         case SR_CONF_SAMPLERATE:
 507                 devc->cur_samplerate = g_variant_get_uint64(data);
 508                 break;
 509         case SR_CONF_LIMIT_SAMPLES:
 510                 devc->limit_samples = g_variant_get_uint64(data);
 511                 break;
 512         case SR_CONF_CAPTURE_RATIO:
 513                 devc->capture_ratio = g_variant_get_uint64(data);
 514                 if (devc->capture_ratio > 100) {
 515                         devc->capture_ratio = 0;
 516                         ret = SR_ERR;
 517                 } else
 518                         ret = SR_OK;
 519                 break;
 520         case SR_CONF_VOLTAGE_THRESHOLD:
 521                 g_variant_get(data, "(dd)", &low, &high);
 522                 ret = SR_ERR_ARG;
 523                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 524                         if (fabs(volt_thresholds[i].low - low) < 0.1 &&
 525                             fabs(volt_thresholds[i].high - high) < 0.1) {
 526                                 devc->selected_voltage_range =
 527                                         volt_thresholds[i].range;
 528                                 ret = SR_OK;
 529                                 break;
 530                         }
 531                 }
 532                 break;
 533         default:
 534                 ret = SR_ERR_NA;
 535         }
 536
 537         return ret;
 538 }
 539
 540 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 541                 const struct sr_channel_group *cg)
 542 {
 543         GVariant *gvar, *range[2];
 544         GVariantBuilder gvb;
 545         int ret;
 546         unsigned int i;
 547
 548         (void)sdi;
 549         (void)cg;
 550
 551         ret = SR_OK;
 552         switch (key) {
 553         case SR_CONF_SCAN_OPTIONS:
 554                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 555                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 556                 break;
 557         case SR_CONF_DEVICE_OPTIONS:
 558                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 559                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 560                 break;
 561         case SR_CONF_SAMPLERATE:
 562                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 563                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 564                         samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 565                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 566                 *data = g_variant_builder_end(&gvb);
 567                 break;
 568         case SR_CONF_VOLTAGE_THRESHOLD:
 569                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 570                 for (i = 0; i < ARRAY_SIZE(volt_thresholds); i++) {
 571                         range[0] = g_variant_new_double(volt_thresholds[i].low);
 572                         range[1] = g_variant_new_double(volt_thresholds[i].high);
 573                         gvar = g_variant_new_tuple(range, 2);
 574                         g_variant_builder_add_value(&gvb, gvar);
 575                 }
 576                 *data = g_variant_builder_end(&gvb);
 577                 break;
 578         case SR_CONF_TRIGGER_MATCH:
 579                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 580                                 soft_trigger_matches, ARRAY_SIZE(soft_trigger_matches),
 581                                 sizeof(int32_t));
 582                 break;
 583         default:
 584                 return SR_ERR_NA;
 585         }
 586
 587         return ret;
 588 }
 589
 590 static void abort_acquisition(struct dev_context *devc)
 591 {
 592         int i;
 593
 594         devc->sent_samples = -1;
 595
 596         for (i = devc->num_transfers - 1; i >= 0; i--) {
 597                 if (devc->transfers[i])
 598                         libusb_cancel_transfer(devc->transfers[i]);
 599         }
 600 }
 601
 602 static unsigned int bytes_per_ms(struct dev_context *devc)
 603 {
 604         return devc->cur_samplerate * devc->num_channels / 8000;
 605 }
 606
 607 static size_t get_buffer_size(struct dev_context *devc)
 608 {
 609         size_t s;
 610
 611         /*
 612          * The buffer should be large enough to hold 10ms of data and
 613          * a multiple of 512.
 614          */
 615         s = 10 * bytes_per_ms(devc);
 616         return (s + 511) & ~511;
 617 }
 618
 619 static unsigned int get_number_of_transfers(struct dev_context *devc)
 620 {
 621         unsigned int n;
 622
 623         /* Total buffer size should be able to hold about 500ms of data. */
 624         n = 500 * bytes_per_ms(devc) / get_buffer_size(devc);
 625
 626         if (n > NUM_SIMUL_TRANSFERS)
 627                 return NUM_SIMUL_TRANSFERS;
 628
 629         return n;
 630 }
 631
 632 static unsigned int get_timeout(struct dev_context *devc)
 633 {
 634         size_t total_size;
 635         unsigned int timeout;
 636
 637         total_size = get_buffer_size(devc) * get_number_of_transfers(devc);
 638         timeout = total_size / bytes_per_ms(devc);
 639         return timeout + timeout / 4; /* Leave a headroom of 25% percent. */
 640 }
 641
 642 static int configure_channels(const struct sr_dev_inst *sdi)
 643 {
 644         struct dev_context *devc;
 645         struct sr_channel *ch;
 646         GSList *l;
 647         uint16_t channel_bit;
 648
 649         devc = sdi->priv;
 650
 651         devc->cur_channels = 0;
 652         devc->num_channels = 0;
 653         for (l = sdi->channels; l; l = l->next) {
 654                 ch = (struct sr_channel *)l->data;
 655                 if (ch->enabled == FALSE)
 656                         continue;
 657
 658                 channel_bit = 1 << (ch->index);
 659
 660                 devc->cur_channels |= channel_bit;
 661
 662 #ifdef WORDS_BIGENDIAN
 663                 /*
 664                  * Output logic data should be stored in little endian format.
 665                  * To speed things up during conversion, do the switcharoo
 666                  * here instead.
 667                  */
 668                 channel_bit = 1 << (ch->index ^ 8);
 669 #endif
 670
 671                 devc->channel_masks[devc->num_channels++] = channel_bit;
 672         }
 673
 674         return SR_OK;
 675 }
 676
 677 static int receive_data(int fd, int revents, void *cb_data)
 678 {
 679         struct timeval tv;
 680         struct dev_context *devc;
 681         struct drv_context *drvc;
 682         const struct sr_dev_inst *sdi;
 683         struct sr_dev_driver *di;
 684
 685         (void)fd;
 686         (void)revents;
 687
 688         sdi = cb_data;
 689         di = sdi->driver;
 690         drvc = di->context;
 691         devc = sdi->priv;
 692
 693         tv.tv_sec = tv.tv_usec = 0;
 694         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 695
 696         if (devc->sent_samples == -2) {
 697                 logic16_abort_acquisition(sdi);
 698                 abort_acquisition(devc);
 699         }
 700
 701         return TRUE;
 702 }
 703
 704 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 705 {
 706         struct sr_dev_driver *di = sdi->driver;
 707         struct dev_context *devc;
 708         struct drv_context *drvc;
 709         struct sr_usb_dev_inst *usb;
 710         struct sr_trigger *trigger;
 711         struct libusb_transfer *transfer;
 712         unsigned int i, timeout, num_transfers;
 713         int ret;
 714         unsigned char *buf;
 715         size_t size, convsize;
 716
 717         if (sdi->status != SR_ST_ACTIVE)
 718                 return SR_ERR_DEV_CLOSED;
 719
 720         drvc = di->context;
 721         devc = sdi->priv;
 722         usb = sdi->conn;
 723
 724         /* Configures devc->cur_channels. */
 725         if (configure_channels(sdi) != SR_OK) {
 726                 sr_err("Failed to configure channels.");
 727                 return SR_ERR;
 728         }
 729
 730         devc->cb_data = cb_data;
 731         devc->sent_samples = 0;
 732         devc->empty_transfer_count = 0;
 733         devc->cur_channel = 0;
 734         memset(devc->channel_data, 0, sizeof(devc->channel_data));
 735
 736         if ((trigger = sr_session_trigger_get(sdi->session))) {
 737                 int pre_trigger_samples = 0;
 738                 if (devc->limit_samples > 0)
 739                         pre_trigger_samples = devc->capture_ratio * devc->limit_samples/100;
 740                 devc->stl = soft_trigger_logic_new(sdi, trigger, pre_trigger_samples);
 741                 if (!devc->stl)
 742                         return SR_ERR_MALLOC;
 743                 devc->trigger_fired = FALSE;
 744         } else
 745                 devc->trigger_fired = TRUE;
 746
 747         timeout = get_timeout(devc);
 748         num_transfers = get_number_of_transfers(devc);
 749         size = get_buffer_size(devc);
 750         convsize = (size / devc->num_channels + 2) * 16;
 751         devc->submitted_transfers = 0;
 752
 753         devc->convbuffer_size = convsize;
 754         if (!(devc->convbuffer = g_try_malloc(convsize))) {
 755                 sr_err("Conversion buffer malloc failed.");
 756                 return SR_ERR_MALLOC;
 757         }
 758
 759         devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
 760         if (!devc->transfers) {
 761                 sr_err("USB transfers malloc failed.");
 762                 g_free(devc->convbuffer);
 763                 return SR_ERR_MALLOC;
 764         }
 765
 766         if ((ret = logic16_setup_acquisition(sdi, devc->cur_samplerate,
 767                                              devc->cur_channels)) != SR_OK) {
 768                 g_free(devc->transfers);
 769                 g_free(devc->convbuffer);
 770                 return ret;
 771         }
 772
 773         devc->num_transfers = num_transfers;
 774         for (i = 0; i < num_transfers; i++) {
 775                 if (!(buf = g_try_malloc(size))) {
 776                         sr_err("USB transfer buffer malloc failed.");
 777                         if (devc->submitted_transfers)
 778                                 abort_acquisition(devc);
 779                         else {
 780                                 g_free(devc->transfers);
 781                                 g_free(devc->convbuffer);
 782                         }
 783                         return SR_ERR_MALLOC;
 784                 }
 785                 transfer = libusb_alloc_transfer(0);
 786                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 787                                 2 | LIBUSB_ENDPOINT_IN, buf, size,
 788                                 logic16_receive_transfer, (void *)sdi, timeout);
 789                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 790                         sr_err("Failed to submit transfer: %s.",
 791                                libusb_error_name(ret));
 792                         libusb_free_transfer(transfer);
 793                         g_free(buf);
 794                         abort_acquisition(devc);
 795                         return SR_ERR;
 796                 }
 797                 devc->transfers[i] = transfer;
 798                 devc->submitted_transfers++;
 799         }
 800
 801         devc->ctx = drvc->sr_ctx;
 802
 803         usb_source_add(sdi->session, devc->ctx, timeout, receive_data, (void *)sdi);
 804
 805         /* Send header packet to the session bus. */
 806         std_session_send_df_header(cb_data, LOG_PREFIX);
 807
 808         if ((ret = logic16_start_acquisition(sdi)) != SR_OK) {
 809                 abort_acquisition(devc);
 810                 return ret;
 811         }
 812
 813         return SR_OK;
 814 }
 815
 816 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 817 {
 818         int ret;
 819
 820         (void)cb_data;
 821
 822         if (sdi->status != SR_ST_ACTIVE)
 823                 return SR_ERR_DEV_CLOSED;
 824
 825         ret = logic16_abort_acquisition(sdi);
 826
 827         abort_acquisition(sdi->priv);
 828
 829         return ret;
 830 }
 831
 832 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = {
 833         .name = "saleae-logic16",
 834         .longname = "Saleae Logic16",
 835         .api_version = 1,
 836         .init = init,
 837         .cleanup = cleanup,
 838         .scan = scan,
 839         .dev_list = dev_list,
 840         .dev_clear = NULL,
 841         .config_get = config_get,
 842         .config_set = config_set,
 843         .config_list = config_list,
 844         .dev_open = dev_open,
 845         .dev_close = dev_close,
 846         .dev_acquisition_start = dev_acquisition_start,
 847         .dev_acquisition_stop = dev_acquisition_stop,
 848         .context = NULL,
 849 };