libusb/os/netbsd_usb.c

   1 /*
   2  * Copyright © 2011 Martin Pieuchot <mpi@openbsd.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include <config.h>
  20
  21 #include <sys/time.h>
  22 #include <sys/types.h>
  23
  24 #include <errno.h>
  25 #include <fcntl.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30
  31 #include <dev/usb/usb.h>
  32
  33 #include "libusbi.h"
  34
  35 struct device_priv {
  36         char devnode[16];
  37         int fd;
  38
  39         unsigned char *cdesc;                   /* active config descriptor */
  40         usb_device_descriptor_t ddesc;          /* usb device descriptor */
  41 };
  42
  43 struct handle_priv {
  44         int pipe[2];                            /* for event notification */
  45         int endpoints[USB_MAX_ENDPOINTS];
  46 };
  47
  48 /*
  49  * Backend functions
  50  */
  51 static int netbsd_get_device_list(struct libusb_context *,
  52     struct discovered_devs **);
  53 static int netbsd_open(struct libusb_device_handle *);
  54 static void netbsd_close(struct libusb_device_handle *);
  55
  56 static int netbsd_get_device_descriptor(struct libusb_device *, unsigned char *,
  57     int *);
  58 static int netbsd_get_active_config_descriptor(struct libusb_device *,
  59     unsigned char *, size_t, int *);
  60 static int netbsd_get_config_descriptor(struct libusb_device *, uint8_t,
  61     unsigned char *, size_t, int *);
  62
  63 static int netbsd_get_configuration(struct libusb_device_handle *, int *);
  64 static int netbsd_set_configuration(struct libusb_device_handle *, int);
  65
  66 static int netbsd_claim_interface(struct libusb_device_handle *, int);
  67 static int netbsd_release_interface(struct libusb_device_handle *, int);
  68
  69 static int netbsd_set_interface_altsetting(struct libusb_device_handle *, int,
  70     int);
  71 static int netbsd_clear_halt(struct libusb_device_handle *, unsigned char);
  72 static int netbsd_reset_device(struct libusb_device_handle *);
  73 static void netbsd_destroy_device(struct libusb_device *);
  74
  75 static int netbsd_submit_transfer(struct usbi_transfer *);
  76 static int netbsd_cancel_transfer(struct usbi_transfer *);
  77 static void netbsd_clear_transfer_priv(struct usbi_transfer *);
  78 static int netbsd_handle_events(struct libusb_context *ctx, struct pollfd *,
  79     nfds_t, int);
  80 static int netbsd_clock_gettime(int, struct timespec *);
  81
  82 /*
  83  * Private functions
  84  */
  85 static int _errno_to_libusb(int);
  86 static int _cache_active_config_descriptor(struct libusb_device *, int);
  87 static int _sync_control_transfer(struct usbi_transfer *);
  88 static int _sync_gen_transfer(struct usbi_transfer *);
  89 static int _access_endpoint(struct libusb_transfer *);
  90
  91 const struct usbi_os_backend netbsd_backend = {
  92         "Synchronous NetBSD backend",
  93         0,
  94         NULL,                           /* init() */
  95         NULL,                           /* exit() */
  96         netbsd_get_device_list,
  97         NULL,                           /* hotplug_poll */
  98         netbsd_open,
  99         netbsd_close,
 100
 101         netbsd_get_device_descriptor,
 102         netbsd_get_active_config_descriptor,
 103         netbsd_get_config_descriptor,
 104         NULL,                           /* get_config_descriptor_by_value() */
 105
 106         netbsd_get_configuration,
 107         netbsd_set_configuration,
 108
 109         netbsd_claim_interface,
 110         netbsd_release_interface,
 111
 112         netbsd_set_interface_altsetting,
 113         netbsd_clear_halt,
 114         netbsd_reset_device,
 115
 116         NULL,                           /* alloc_streams */
 117         NULL,                           /* free_streams */
 118
 119         NULL,                           /* kernel_driver_active() */
 120         NULL,                           /* detach_kernel_driver() */
 121         NULL,                           /* attach_kernel_driver() */
 122
 123         netbsd_destroy_device,
 124
 125         netbsd_submit_transfer,
 126         netbsd_cancel_transfer,
 127         netbsd_clear_transfer_priv,
 128
 129         netbsd_handle_events,
 130
 131         netbsd_clock_gettime,
 132         sizeof(struct device_priv),
 133         sizeof(struct handle_priv),
 134         0,                              /* transfer_priv_size */
 135         0,                              /* add_iso_packet_size */
 136 };
 137
 138 int
 139 netbsd_get_device_list(struct libusb_context * ctx,
 140         struct discovered_devs **discdevs)
 141 {
 142         struct libusb_device *dev;
 143         struct device_priv *dpriv;
 144         struct usb_device_info di;
 145         unsigned long session_id;
 146         char devnode[16];
 147         int fd, err, i;
 148
 149         usbi_dbg("");
 150
 151         /* Only ugen(4) is supported */
 152         for (i = 0; i < USB_MAX_DEVICES; i++) {
 153                 /* Control endpoint is always .00 */
 154                 snprintf(devnode, sizeof(devnode), "/dev/ugen%d.00", i);
 155
 156                 if ((fd = open(devnode, O_RDONLY)) < 0) {
 157                         if (errno != ENOENT && errno != ENXIO)
 158                                 usbi_err(ctx, "could not open %s", devnode);
 159                         continue;
 160                 }
 161
 162                 if (ioctl(fd, USB_GET_DEVICEINFO, &di) < 0)
 163                         continue;
 164
 165                 session_id = (di.udi_bus << 8 | di.udi_addr);
 166                 dev = usbi_get_device_by_session_id(ctx, session_id);
 167
 168                 if (dev == NULL) {
 169                         dev = usbi_alloc_device(ctx, session_id);
 170                         if (dev == NULL)
 171                                 return (LIBUSB_ERROR_NO_MEM);
 172
 173                         dev->bus_number = di.udi_bus;
 174                         dev->device_address = di.udi_addr;
 175                         dev->speed = di.udi_speed;
 176
 177                         dpriv = (struct device_priv *)dev->os_priv;
 178                         strlcpy(dpriv->devnode, devnode, sizeof(devnode));
 179                         dpriv->fd = -1;
 180
 181                         if (ioctl(fd, USB_GET_DEVICE_DESC, &dpriv->ddesc) < 0) {
 182                                 err = errno;
 183                                 goto error;
 184                         }
 185
 186                         dpriv->cdesc = NULL;
 187                         if (_cache_active_config_descriptor(dev, fd)) {
 188                                 err = errno;
 189                                 goto error;
 190                         }
 191
 192                         if ((err = usbi_sanitize_device(dev)))
 193                                 goto error;
 194                 }
 195                 close(fd);
 196
 197                 if (discovered_devs_append(*discdevs, dev) == NULL)
 198                         return (LIBUSB_ERROR_NO_MEM);
 199
 200                 libusb_unref_device(dev);
 201         }
 202
 203         return (LIBUSB_SUCCESS);
 204
 205 error:
 206         close(fd);
 207         libusb_unref_device(dev);
 208         return _errno_to_libusb(err);
 209 }
 210
 211 int
 212 netbsd_open(struct libusb_device_handle *handle)
 213 {
 214         struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv;
 215         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 216
 217         dpriv->fd = open(dpriv->devnode, O_RDWR);
 218         if (dpriv->fd < 0) {
 219                 dpriv->fd = open(dpriv->devnode, O_RDONLY);
 220                 if (dpriv->fd < 0)
 221                         return _errno_to_libusb(errno);
 222         }
 223
 224         usbi_dbg("open %s: fd %d", dpriv->devnode, dpriv->fd);
 225
 226         if (pipe(hpriv->pipe) < 0)
 227                 return _errno_to_libusb(errno);
 228
 229         return usbi_add_pollfd(HANDLE_CTX(handle), hpriv->pipe[0], POLLIN);
 230 }
 231
 232 void
 233 netbsd_close(struct libusb_device_handle *handle)
 234 {
 235         struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv;
 236         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 237
 238         usbi_dbg("close: fd %d", dpriv->fd);
 239
 240         close(dpriv->fd);
 241         dpriv->fd = -1;
 242
 243         usbi_remove_pollfd(HANDLE_CTX(handle), hpriv->pipe[0]);
 244
 245         close(hpriv->pipe[0]);
 246         close(hpriv->pipe[1]);
 247 }
 248
 249 int
 250 netbsd_get_device_descriptor(struct libusb_device *dev, unsigned char *buf,
 251     int *host_endian)
 252 {
 253         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 254
 255         usbi_dbg("");
 256
 257         memcpy(buf, &dpriv->ddesc, DEVICE_DESC_LENGTH);
 258
 259         *host_endian = 0;
 260
 261         return (LIBUSB_SUCCESS);
 262 }
 263
 264 int
 265 netbsd_get_active_config_descriptor(struct libusb_device *dev,
 266     unsigned char *buf, size_t len, int *host_endian)
 267 {
 268         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 269         usb_config_descriptor_t *ucd;
 270
 271         ucd = (usb_config_descriptor_t *) dpriv->cdesc;
 272         len = MIN(len, UGETW(ucd->wTotalLength));
 273
 274         usbi_dbg("len %d", len);
 275
 276         memcpy(buf, dpriv->cdesc, len);
 277
 278         *host_endian = 0;
 279
 280         return len;
 281 }
 282
 283 int
 284 netbsd_get_config_descriptor(struct libusb_device *dev, uint8_t idx,
 285     unsigned char *buf, size_t len, int *host_endian)
 286 {
 287         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 288         struct usb_full_desc ufd;
 289         int fd, err;
 290
 291         usbi_dbg("index %d, len %d", idx, len);
 292
 293         /* A config descriptor may be requested before opening the device */
 294         if (dpriv->fd >= 0) {
 295                 fd = dpriv->fd;
 296         } else {
 297                 fd = open(dpriv->devnode, O_RDONLY);
 298                 if (fd < 0)
 299                         return _errno_to_libusb(errno);
 300         }
 301
 302         ufd.ufd_config_index = idx;
 303         ufd.ufd_size = len;
 304         ufd.ufd_data = buf;
 305
 306         if ((ioctl(fd, USB_GET_FULL_DESC, &ufd)) < 0) {
 307                 err = errno;
 308                 if (dpriv->fd < 0)
 309                         close(fd);
 310                 return _errno_to_libusb(err);
 311         }
 312
 313         if (dpriv->fd < 0)
 314                 close(fd);
 315
 316         *host_endian = 0;
 317
 318         return len;
 319 }
 320
 321 int
 322 netbsd_get_configuration(struct libusb_device_handle *handle, int *config)
 323 {
 324         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 325
 326         usbi_dbg("");
 327
 328         if (ioctl(dpriv->fd, USB_GET_CONFIG, config) < 0)
 329                 return _errno_to_libusb(errno);
 330
 331         usbi_dbg("configuration %d", *config);
 332
 333         return (LIBUSB_SUCCESS);
 334 }
 335
 336 int
 337 netbsd_set_configuration(struct libusb_device_handle *handle, int config)
 338 {
 339         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 340
 341         usbi_dbg("configuration %d", config);
 342
 343         if (ioctl(dpriv->fd, USB_SET_CONFIG, &config) < 0)
 344                 return _errno_to_libusb(errno);
 345
 346         return _cache_active_config_descriptor(handle->dev, dpriv->fd);
 347 }
 348
 349 int
 350 netbsd_claim_interface(struct libusb_device_handle *handle, int iface)
 351 {
 352         struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv;
 353         int i;
 354
 355         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
 356                 hpriv->endpoints[i] = -1;
 357
 358         return (LIBUSB_SUCCESS);
 359 }
 360
 361 int
 362 netbsd_release_interface(struct libusb_device_handle *handle, int iface)
 363 {
 364         struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv;
 365         int i;
 366
 367         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
 368                 if (hpriv->endpoints[i] >= 0)
 369                         close(hpriv->endpoints[i]);
 370
 371         return (LIBUSB_SUCCESS);
 372 }
 373
 374 int
 375 netbsd_set_interface_altsetting(struct libusb_device_handle *handle, int iface,
 376     int altsetting)
 377 {
 378         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 379         struct usb_alt_interface intf;
 380
 381         usbi_dbg("iface %d, setting %d", iface, altsetting);
 382
 383         memset(&intf, 0, sizeof(intf));
 384
 385         intf.uai_interface_index = iface;
 386         intf.uai_alt_no = altsetting;
 387
 388         if (ioctl(dpriv->fd, USB_SET_ALTINTERFACE, &intf) < 0)
 389                 return _errno_to_libusb(errno);
 390
 391         return (LIBUSB_SUCCESS);
 392 }
 393
 394 int
 395 netbsd_clear_halt(struct libusb_device_handle *handle, unsigned char endpoint)
 396 {
 397         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 398         struct usb_ctl_request req;
 399
 400         usbi_dbg("");
 401
 402         req.ucr_request.bmRequestType = UT_WRITE_ENDPOINT;
 403         req.ucr_request.bRequest = UR_CLEAR_FEATURE;
 404         USETW(req.ucr_request.wValue, UF_ENDPOINT_HALT);
 405         USETW(req.ucr_request.wIndex, endpoint);
 406         USETW(req.ucr_request.wLength, 0);
 407
 408         if (ioctl(dpriv->fd, USB_DO_REQUEST, &req) < 0)
 409                 return _errno_to_libusb(errno);
 410
 411         return (LIBUSB_SUCCESS);
 412 }
 413
 414 int
 415 netbsd_reset_device(struct libusb_device_handle *handle)
 416 {
 417         usbi_dbg("");
 418
 419         return (LIBUSB_ERROR_NOT_SUPPORTED);
 420 }
 421
 422 void
 423 netbsd_destroy_device(struct libusb_device *dev)
 424 {
 425         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 426
 427         usbi_dbg("");
 428
 429         free(dpriv->cdesc);
 430 }
 431
 432 int
 433 netbsd_submit_transfer(struct usbi_transfer *itransfer)
 434 {
 435         struct libusb_transfer *transfer;
 436         struct handle_priv *hpriv;
 437         int err = 0;
 438
 439         usbi_dbg("");
 440
 441         transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
 442         hpriv = (struct handle_priv *)transfer->dev_handle->os_priv;
 443
 444         switch (transfer->type) {
 445         case LIBUSB_TRANSFER_TYPE_CONTROL:
 446                 err = _sync_control_transfer(itransfer);
 447                 break;
 448         case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
 449                 if (IS_XFEROUT(transfer)) {
 450                         /* Isochronous write is not supported */
 451                         err = LIBUSB_ERROR_NOT_SUPPORTED;
 452                         break;
 453                 }
 454                 err = _sync_gen_transfer(itransfer);
 455                 break;
 456         case LIBUSB_TRANSFER_TYPE_BULK:
 457         case LIBUSB_TRANSFER_TYPE_INTERRUPT:
 458                 if (IS_XFEROUT(transfer) &&
 459                     transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) {
 460                         err = LIBUSB_ERROR_NOT_SUPPORTED;
 461                         break;
 462                 }
 463                 err = _sync_gen_transfer(itransfer);
 464                 break;
 465         case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
 466                 err = LIBUSB_ERROR_NOT_SUPPORTED;
 467                 break;
 468         }
 469
 470         if (err)
 471                 return (err);
 472
 473         if (write(hpriv->pipe[1], &itransfer, sizeof(itransfer)) < 0)
 474                 return _errno_to_libusb(errno);
 475
 476         return (LIBUSB_SUCCESS);
 477 }
 478
 479 int
 480 netbsd_cancel_transfer(struct usbi_transfer *itransfer)
 481 {
 482         usbi_dbg("");
 483
 484         return (LIBUSB_ERROR_NOT_SUPPORTED);
 485 }
 486
 487 void
 488 netbsd_clear_transfer_priv(struct usbi_transfer *itransfer)
 489 {
 490         usbi_dbg("");
 491
 492         /* Nothing to do */
 493 }
 494
 495 int
 496 netbsd_handle_events(struct libusb_context *ctx, struct pollfd *fds, nfds_t nfds,
 497     int num_ready)
 498 {
 499         struct libusb_device_handle *handle;
 500         struct handle_priv *hpriv = NULL;
 501         struct usbi_transfer *itransfer;
 502         struct pollfd *pollfd;
 503         int i, err = 0;
 504
 505         usbi_dbg("");
 506
 507         pthread_mutex_lock(&ctx->open_devs_lock);
 508         for (i = 0; i < nfds && num_ready > 0; i++) {
 509                 pollfd = &fds[i];
 510
 511                 if (!pollfd->revents)
 512                         continue;
 513
 514                 hpriv = NULL;
 515                 num_ready--;
 516                 list_for_each_entry(handle, &ctx->open_devs, list,
 517                     struct libusb_device_handle) {
 518                         hpriv = (struct handle_priv *)handle->os_priv;
 519
 520                         if (hpriv->pipe[0] == pollfd->fd)
 521                                 break;
 522
 523                         hpriv = NULL;
 524                 }
 525
 526                 if (NULL == hpriv) {
 527                         usbi_dbg("fd %d is not an event pipe!", pollfd->fd);
 528                         err = ENOENT;
 529                         break;
 530                 }
 531
 532                 if (pollfd->revents & POLLERR) {
 533                         usbi_remove_pollfd(HANDLE_CTX(handle), hpriv->pipe[0]);
 534                         usbi_handle_disconnect(handle);
 535                         continue;
 536                 }
 537
 538                 if (read(hpriv->pipe[0], &itransfer, sizeof(itransfer)) < 0) {
 539                         err = errno;
 540                         break;
 541                 }
 542
 543                 if ((err = usbi_handle_transfer_completion(itransfer,
 544                     LIBUSB_TRANSFER_COMPLETED)))
 545                         break;
 546         }
 547         pthread_mutex_unlock(&ctx->open_devs_lock);
 548
 549         if (err)
 550                 return _errno_to_libusb(err);
 551
 552         return (LIBUSB_SUCCESS);
 553 }
 554
 555 int
 556 netbsd_clock_gettime(int clkid, struct timespec *tp)
 557 {
 558         usbi_dbg("clock %d", clkid);
 559
 560         if (clkid == USBI_CLOCK_REALTIME)
 561                 return clock_gettime(CLOCK_REALTIME, tp);
 562
 563         if (clkid == USBI_CLOCK_MONOTONIC)
 564                 return clock_gettime(CLOCK_MONOTONIC, tp);
 565
 566         return (LIBUSB_ERROR_INVALID_PARAM);
 567 }
 568
 569 int
 570 _errno_to_libusb(int err)
 571 {
 572         switch (err) {
 573         case EIO:
 574                 return (LIBUSB_ERROR_IO);
 575         case EACCES:
 576                 return (LIBUSB_ERROR_ACCESS);
 577         case ENOENT:
 578                 return (LIBUSB_ERROR_NO_DEVICE);
 579         case ENOMEM:
 580                 return (LIBUSB_ERROR_NO_MEM);
 581         }
 582
 583         usbi_dbg("error: %s", strerror(err));
 584
 585         return (LIBUSB_ERROR_OTHER);
 586 }
 587
 588 int
 589 _cache_active_config_descriptor(struct libusb_device *dev, int fd)
 590 {
 591         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 592         struct usb_config_desc ucd;
 593         struct usb_full_desc ufd;
 594         unsigned char* buf;
 595         int len;
 596
 597         usbi_dbg("fd %d", fd);
 598
 599         ucd.ucd_config_index = USB_CURRENT_CONFIG_INDEX;
 600
 601         if ((ioctl(fd, USB_GET_CONFIG_DESC, &ucd)) < 0)
 602                 return _errno_to_libusb(errno);
 603
 604         usbi_dbg("active bLength %d", ucd.ucd_desc.bLength);
 605
 606         len = UGETW(ucd.ucd_desc.wTotalLength);
 607         buf = malloc(len);
 608         if (buf == NULL)
 609                 return (LIBUSB_ERROR_NO_MEM);
 610
 611         ufd.ufd_config_index = ucd.ucd_config_index;
 612         ufd.ufd_size = len;
 613         ufd.ufd_data = buf;
 614
 615         usbi_dbg("index %d, len %d", ufd.ufd_config_index, len);
 616
 617         if ((ioctl(fd, USB_GET_FULL_DESC, &ufd)) < 0) {
 618                 free(buf);
 619                 return _errno_to_libusb(errno);
 620         }
 621
 622         if (dpriv->cdesc)
 623                 free(dpriv->cdesc);
 624         dpriv->cdesc = buf;
 625
 626         return (0);
 627 }
 628
 629 int
 630 _sync_control_transfer(struct usbi_transfer *itransfer)
 631 {
 632         struct libusb_transfer *transfer;
 633         struct libusb_control_setup *setup;
 634         struct device_priv *dpriv;
 635         struct usb_ctl_request req;
 636
 637         transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
 638         dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv;
 639         setup = (struct libusb_control_setup *)transfer->buffer;
 640
 641         usbi_dbg("type %d request %d value %d index %d length %d timeout %d",
 642             setup->bmRequestType, setup->bRequest,
 643             libusb_le16_to_cpu(setup->wValue),
 644             libusb_le16_to_cpu(setup->wIndex),
 645             libusb_le16_to_cpu(setup->wLength), transfer->timeout);
 646
 647         req.ucr_request.bmRequestType = setup->bmRequestType;
 648         req.ucr_request.bRequest = setup->bRequest;
 649         /* Don't use USETW, libusb already deals with the endianness */
 650         (*(uint16_t *)req.ucr_request.wValue) = setup->wValue;
 651         (*(uint16_t *)req.ucr_request.wIndex) = setup->wIndex;
 652         (*(uint16_t *)req.ucr_request.wLength) = setup->wLength;
 653         req.ucr_data = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
 654
 655         if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0)
 656                 req.ucr_flags = USBD_SHORT_XFER_OK;
 657
 658         if ((ioctl(dpriv->fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0)
 659                 return _errno_to_libusb(errno);
 660
 661         if ((ioctl(dpriv->fd, USB_DO_REQUEST, &req)) < 0)
 662                 return _errno_to_libusb(errno);
 663
 664         itransfer->transferred = req.ucr_actlen;
 665
 666         usbi_dbg("transferred %d", itransfer->transferred);
 667
 668         return (0);
 669 }
 670
 671 int
 672 _access_endpoint(struct libusb_transfer *transfer)
 673 {
 674         struct handle_priv *hpriv;
 675         struct device_priv *dpriv;
 676         char *s, devnode[16];
 677         int fd, endpt;
 678         mode_t mode;
 679
 680         hpriv = (struct handle_priv *)transfer->dev_handle->os_priv;
 681         dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv;
 682
 683         endpt = UE_GET_ADDR(transfer->endpoint);
 684         mode = IS_XFERIN(transfer) ? O_RDONLY : O_WRONLY;
 685
 686         usbi_dbg("endpoint %d mode %d", endpt, mode);
 687
 688         if (hpriv->endpoints[endpt] < 0) {
 689                 /* Pick the right node given the control one */
 690                 strlcpy(devnode, dpriv->devnode, sizeof(devnode));
 691                 s = strchr(devnode, '.');
 692                 snprintf(s, 4, ".%02d", endpt);
 693
 694                 /* We may need to read/write to the same endpoint later. */
 695                 if (((fd = open(devnode, O_RDWR)) < 0) && (errno == ENXIO))
 696                         if ((fd = open(devnode, mode)) < 0)
 697                                 return (-1);
 698
 699                 hpriv->endpoints[endpt] = fd;
 700         }
 701
 702         return (hpriv->endpoints[endpt]);
 703 }
 704
 705 int
 706 _sync_gen_transfer(struct usbi_transfer *itransfer)
 707 {
 708         struct libusb_transfer *transfer;
 709         int fd, nr = 1;
 710
 711         transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
 712
 713         /*
 714          * Bulk, Interrupt or Isochronous transfer depends on the
 715          * endpoint and thus the node to open.
 716          */
 717         if ((fd = _access_endpoint(transfer)) < 0)
 718                 return _errno_to_libusb(errno);
 719
 720         if ((ioctl(fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0)
 721                 return _errno_to_libusb(errno);
 722
 723         if (IS_XFERIN(transfer)) {
 724                 if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0)
 725                         if ((ioctl(fd, USB_SET_SHORT_XFER, &nr)) < 0)
 726                                 return _errno_to_libusb(errno);
 727
 728                 nr = read(fd, transfer->buffer, transfer->length);
 729         } else {
 730                 nr = write(fd, transfer->buffer, transfer->length);
 731         }
 732
 733         if (nr < 0)
 734                 return _errno_to_libusb(errno);
 735
 736         itransfer->transferred = nr;
 737
 738         return (0);
 739 }