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