libusb/os/openbsd_usb.c

   1 /*
   2  * Copyright © 2011-2013 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 *devname;                          /* name of the ugen(4) node */
  37         int fd;                                 /* device file descriptor */
  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 endpoints[USB_MAX_ENDPOINTS];
  45 };
  46
  47 /*
  48  * Backend functions
  49  */
  50 static int obsd_get_device_list(struct libusb_context *,
  51     struct discovered_devs **);
  52 static int obsd_open(struct libusb_device_handle *);
  53 static void obsd_close(struct libusb_device_handle *);
  54
  55 static int obsd_get_device_descriptor(struct libusb_device *, unsigned char *,
  56     int *);
  57 static int obsd_get_active_config_descriptor(struct libusb_device *,
  58     unsigned char *, size_t, int *);
  59 static int obsd_get_config_descriptor(struct libusb_device *, uint8_t,
  60     unsigned char *, size_t, int *);
  61
  62 static int obsd_get_configuration(struct libusb_device_handle *, int *);
  63 static int obsd_set_configuration(struct libusb_device_handle *, int);
  64
  65 static int obsd_claim_interface(struct libusb_device_handle *, int);
  66 static int obsd_release_interface(struct libusb_device_handle *, int);
  67
  68 static int obsd_set_interface_altsetting(struct libusb_device_handle *, int,
  69     int);
  70 static int obsd_clear_halt(struct libusb_device_handle *, unsigned char);
  71 static int obsd_reset_device(struct libusb_device_handle *);
  72 static void obsd_destroy_device(struct libusb_device *);
  73
  74 static int obsd_submit_transfer(struct usbi_transfer *);
  75 static int obsd_cancel_transfer(struct usbi_transfer *);
  76 static void obsd_clear_transfer_priv(struct usbi_transfer *);
  77 static int obsd_handle_transfer_completion(struct usbi_transfer *);
  78 static int obsd_clock_gettime(int, struct timespec *);
  79
  80 /*
  81  * Private functions
  82  */
  83 static int _errno_to_libusb(int);
  84 static int _cache_active_config_descriptor(struct libusb_device *);
  85 static int _sync_control_transfer(struct usbi_transfer *);
  86 static int _sync_gen_transfer(struct usbi_transfer *);
  87 static int _access_endpoint(struct libusb_transfer *);
  88
  89 static int _bus_open(int);
  90
  91
  92 const struct usbi_os_backend usbi_backend = {
  93         .name = "Synchronous OpenBSD backend",
  94         .get_device_list = obsd_get_device_list,
  95         .open = obsd_open,
  96         .close = obsd_close,
  97
  98         .get_device_descriptor = obsd_get_device_descriptor,
  99         .get_active_config_descriptor = obsd_get_active_config_descriptor,
 100         .get_config_descriptor = obsd_get_config_descriptor,
 101
 102         .get_configuration = obsd_get_configuration,
 103         .set_configuration = obsd_set_configuration,
 104
 105         .claim_interface = obsd_claim_interface,
 106         .release_interface = obsd_release_interface,
 107
 108         .set_interface_altsetting = obsd_set_interface_altsetting,
 109         .clear_halt = obsd_clear_halt,
 110         .reset_device = obsd_reset_device,
 111         .destroy_device = obsd_destroy_device,
 112
 113         .submit_transfer = obsd_submit_transfer,
 114         .cancel_transfer = obsd_cancel_transfer,
 115         .clear_transfer_priv = obsd_clear_transfer_priv,
 116
 117         .handle_transfer_completion = obsd_handle_transfer_completion,
 118
 119         .clock_gettime = obsd_clock_gettime,
 120         .device_priv_size = sizeof(struct device_priv),
 121         .device_handle_priv_size = sizeof(struct handle_priv),
 122 };
 123
 124 #define DEVPATH "/dev/"
 125 #define USBDEV  DEVPATH "usb"
 126
 127 int
 128 obsd_get_device_list(struct libusb_context * ctx,
 129         struct discovered_devs **discdevs)
 130 {
 131         struct discovered_devs *ddd;
 132         struct libusb_device *dev;
 133         struct device_priv *dpriv;
 134         struct usb_device_info di;
 135         struct usb_device_ddesc dd;
 136         unsigned long session_id;
 137         char devices[USB_MAX_DEVICES];
 138         char busnode[16];
 139         char *udevname;
 140         int fd, addr, i, j;
 141
 142         usbi_dbg("");
 143
 144         for (i = 0; i < 8; i++) {
 145                 snprintf(busnode, sizeof(busnode), USBDEV "%d", i);
 146
 147                 if ((fd = open(busnode, O_RDWR)) < 0) {
 148                         if (errno != ENOENT && errno != ENXIO)
 149                                 usbi_err(ctx, "could not open %s", busnode);
 150                         continue;
 151                 }
 152
 153                 bzero(devices, sizeof(devices));
 154                 for (addr = 1; addr < USB_MAX_DEVICES; addr++) {
 155                         if (devices[addr])
 156                                 continue;
 157
 158                         di.udi_addr = addr;
 159                         if (ioctl(fd, USB_DEVICEINFO, &di) < 0)
 160                                 continue;
 161
 162                         /*
 163                          * XXX If ugen(4) is attached to the USB device
 164                          * it will be used.
 165                          */
 166                         udevname = NULL;
 167                         for (j = 0; j < USB_MAX_DEVNAMES; j++)
 168                                 if (!strncmp("ugen", di.udi_devnames[j], 4)) {
 169                                         udevname = strdup(di.udi_devnames[j]);
 170                                         break;
 171                                 }
 172
 173                         session_id = (di.udi_bus << 8 | di.udi_addr);
 174                         dev = usbi_get_device_by_session_id(ctx, session_id);
 175
 176                         if (dev == NULL) {
 177                                 dev = usbi_alloc_device(ctx, session_id);
 178                                 if (dev == NULL) {
 179                                         close(fd);
 180                                         return (LIBUSB_ERROR_NO_MEM);
 181                                 }
 182
 183                                 dev->bus_number = di.udi_bus;
 184                                 dev->device_address = di.udi_addr;
 185                                 dev->speed = di.udi_speed;
 186
 187                                 dpriv = (struct device_priv *)dev->os_priv;
 188                                 dpriv->fd = -1;
 189                                 dpriv->cdesc = NULL;
 190                                 dpriv->devname = udevname;
 191
 192                                 dd.udd_bus = di.udi_bus;
 193                                 dd.udd_addr = di.udi_addr;
 194                                 if (ioctl(fd, USB_DEVICE_GET_DDESC, &dd) < 0) {
 195                                         libusb_unref_device(dev);
 196                                         continue;
 197                                 }
 198                                 dpriv->ddesc = dd.udd_desc;
 199
 200                                 if (_cache_active_config_descriptor(dev)) {
 201                                         libusb_unref_device(dev);
 202                                         continue;
 203                                 }
 204
 205                                 if (usbi_sanitize_device(dev)) {
 206                                         libusb_unref_device(dev);
 207                                         continue;
 208                                 }
 209                         }
 210
 211                         ddd = discovered_devs_append(*discdevs, dev);
 212                         if (ddd == NULL) {
 213                                 close(fd);
 214                                 return (LIBUSB_ERROR_NO_MEM);
 215                         }
 216                         libusb_unref_device(dev);
 217
 218                         *discdevs = ddd;
 219                         devices[addr] = 1;
 220                 }
 221
 222                 close(fd);
 223         }
 224
 225         return (LIBUSB_SUCCESS);
 226 }
 227
 228 int
 229 obsd_open(struct libusb_device_handle *handle)
 230 {
 231         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 232         char devnode[16];
 233
 234         if (dpriv->devname) {
 235                 /*
 236                  * Only open ugen(4) attached devices read-write, all
 237                  * read-only operations are done through the bus node.
 238                  */
 239                 snprintf(devnode, sizeof(devnode), DEVPATH "%s.00",
 240                     dpriv->devname);
 241                 dpriv->fd = open(devnode, O_RDWR);
 242                 if (dpriv->fd < 0)
 243                         return _errno_to_libusb(errno);
 244
 245                 usbi_dbg("open %s: fd %d", devnode, dpriv->fd);
 246         }
 247
 248         return (LIBUSB_SUCCESS);
 249 }
 250
 251 void
 252 obsd_close(struct libusb_device_handle *handle)
 253 {
 254         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 255
 256         if (dpriv->devname) {
 257                 usbi_dbg("close: fd %d", dpriv->fd);
 258
 259                 close(dpriv->fd);
 260                 dpriv->fd = -1;
 261         }
 262 }
 263
 264 int
 265 obsd_get_device_descriptor(struct libusb_device *dev, unsigned char *buf,
 266     int *host_endian)
 267 {
 268         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 269
 270         usbi_dbg("");
 271
 272         memcpy(buf, &dpriv->ddesc, DEVICE_DESC_LENGTH);
 273
 274         *host_endian = 0;
 275
 276         return (LIBUSB_SUCCESS);
 277 }
 278
 279 int
 280 obsd_get_active_config_descriptor(struct libusb_device *dev,
 281     unsigned char *buf, size_t len, int *host_endian)
 282 {
 283         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 284         usb_config_descriptor_t *ucd = (usb_config_descriptor_t *)dpriv->cdesc;
 285
 286         len = MIN(len, UGETW(ucd->wTotalLength));
 287
 288         usbi_dbg("len %zu", len);
 289
 290         memcpy(buf, dpriv->cdesc, len);
 291
 292         *host_endian = 0;
 293
 294         return (len);
 295 }
 296
 297 int
 298 obsd_get_config_descriptor(struct libusb_device *dev, uint8_t idx,
 299     unsigned char *buf, size_t len, int *host_endian)
 300 {
 301         struct usb_device_fdesc udf;
 302         int fd, err;
 303
 304         if ((fd = _bus_open(dev->bus_number)) < 0)
 305                 return _errno_to_libusb(errno);
 306
 307         udf.udf_bus = dev->bus_number;
 308         udf.udf_addr = dev->device_address;
 309         udf.udf_config_index = idx;
 310         udf.udf_size = len;
 311         udf.udf_data = buf;
 312
 313         usbi_dbg("index %d, len %zu", udf.udf_config_index, len);
 314
 315         if (ioctl(fd, USB_DEVICE_GET_FDESC, &udf) < 0) {
 316                 err = errno;
 317                 close(fd);
 318                 return _errno_to_libusb(err);
 319         }
 320         close(fd);
 321
 322         *host_endian = 0;
 323
 324         return (len);
 325 }
 326
 327 int
 328 obsd_get_configuration(struct libusb_device_handle *handle, int *config)
 329 {
 330         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 331         usb_config_descriptor_t *ucd = (usb_config_descriptor_t *)dpriv->cdesc;
 332
 333         *config = ucd->bConfigurationValue;
 334
 335         usbi_dbg("bConfigurationValue %d", *config);
 336
 337         return (LIBUSB_SUCCESS);
 338 }
 339
 340 int
 341 obsd_set_configuration(struct libusb_device_handle *handle, int config)
 342 {
 343         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 344
 345         if (dpriv->devname == NULL)
 346                 return (LIBUSB_ERROR_NOT_SUPPORTED);
 347
 348         usbi_dbg("bConfigurationValue %d", config);
 349
 350         if (ioctl(dpriv->fd, USB_SET_CONFIG, &config) < 0)
 351                 return _errno_to_libusb(errno);
 352
 353         return _cache_active_config_descriptor(handle->dev);
 354 }
 355
 356 int
 357 obsd_claim_interface(struct libusb_device_handle *handle, int iface)
 358 {
 359         struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv;
 360         int i;
 361
 362         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
 363                 hpriv->endpoints[i] = -1;
 364
 365         return (LIBUSB_SUCCESS);
 366 }
 367
 368 int
 369 obsd_release_interface(struct libusb_device_handle *handle, int iface)
 370 {
 371         struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv;
 372         int i;
 373
 374         for (i = 0; i < USB_MAX_ENDPOINTS; i++)
 375                 if (hpriv->endpoints[i] >= 0)
 376                         close(hpriv->endpoints[i]);
 377
 378         return (LIBUSB_SUCCESS);
 379 }
 380
 381 int
 382 obsd_set_interface_altsetting(struct libusb_device_handle *handle, int iface,
 383     int altsetting)
 384 {
 385         struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
 386         struct usb_alt_interface intf;
 387
 388         if (dpriv->devname == NULL)
 389                 return (LIBUSB_ERROR_NOT_SUPPORTED);
 390
 391         usbi_dbg("iface %d, setting %d", iface, altsetting);
 392
 393         memset(&intf, 0, sizeof(intf));
 394
 395         intf.uai_interface_index = iface;
 396         intf.uai_alt_no = altsetting;
 397
 398         if (ioctl(dpriv->fd, USB_SET_ALTINTERFACE, &intf) < 0)
 399                 return _errno_to_libusb(errno);
 400
 401         return (LIBUSB_SUCCESS);
 402 }
 403
 404 int
 405 obsd_clear_halt(struct libusb_device_handle *handle, unsigned char endpoint)
 406 {
 407         struct usb_ctl_request req;
 408         int fd, err;
 409
 410         if ((fd = _bus_open(handle->dev->bus_number)) < 0)
 411                 return _errno_to_libusb(errno);
 412
 413         usbi_dbg("");
 414
 415         req.ucr_addr = handle->dev->device_address;
 416         req.ucr_request.bmRequestType = UT_WRITE_ENDPOINT;
 417         req.ucr_request.bRequest = UR_CLEAR_FEATURE;
 418         USETW(req.ucr_request.wValue, UF_ENDPOINT_HALT);
 419         USETW(req.ucr_request.wIndex, endpoint);
 420         USETW(req.ucr_request.wLength, 0);
 421
 422         if (ioctl(fd, USB_REQUEST, &req) < 0) {
 423                 err = errno;
 424                 close(fd);
 425                 return _errno_to_libusb(err);
 426         }
 427         close(fd);
 428
 429         return (LIBUSB_SUCCESS);
 430 }
 431
 432 int
 433 obsd_reset_device(struct libusb_device_handle *handle)
 434 {
 435         usbi_dbg("");
 436
 437         return (LIBUSB_ERROR_NOT_SUPPORTED);
 438 }
 439
 440 void
 441 obsd_destroy_device(struct libusb_device *dev)
 442 {
 443         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 444
 445         usbi_dbg("");
 446
 447         free(dpriv->cdesc);
 448         free(dpriv->devname);
 449 }
 450
 451 int
 452 obsd_submit_transfer(struct usbi_transfer *itransfer)
 453 {
 454         struct libusb_transfer *transfer;
 455         struct handle_priv *hpriv;
 456         int err = 0;
 457
 458         usbi_dbg("");
 459
 460         transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
 461         hpriv = (struct handle_priv *)transfer->dev_handle->os_priv;
 462
 463         switch (transfer->type) {
 464         case LIBUSB_TRANSFER_TYPE_CONTROL:
 465                 err = _sync_control_transfer(itransfer);
 466                 break;
 467         case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
 468                 if (IS_XFEROUT(transfer)) {
 469                         /* Isochronous write is not supported */
 470                         err = LIBUSB_ERROR_NOT_SUPPORTED;
 471                         break;
 472                 }
 473                 err = _sync_gen_transfer(itransfer);
 474                 break;
 475         case LIBUSB_TRANSFER_TYPE_BULK:
 476         case LIBUSB_TRANSFER_TYPE_INTERRUPT:
 477                 if (IS_XFEROUT(transfer) &&
 478                     transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) {
 479                         err = LIBUSB_ERROR_NOT_SUPPORTED;
 480                         break;
 481                 }
 482                 err = _sync_gen_transfer(itransfer);
 483                 break;
 484         case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
 485                 err = LIBUSB_ERROR_NOT_SUPPORTED;
 486                 break;
 487         }
 488
 489         if (err)
 490                 return (err);
 491
 492         usbi_signal_transfer_completion(itransfer);
 493
 494         return (LIBUSB_SUCCESS);
 495 }
 496
 497 int
 498 obsd_cancel_transfer(struct usbi_transfer *itransfer)
 499 {
 500         usbi_dbg("");
 501
 502         return (LIBUSB_ERROR_NOT_SUPPORTED);
 503 }
 504
 505 void
 506 obsd_clear_transfer_priv(struct usbi_transfer *itransfer)
 507 {
 508         usbi_dbg("");
 509
 510         /* Nothing to do */
 511 }
 512
 513 int
 514 obsd_handle_transfer_completion(struct usbi_transfer *itransfer)
 515 {
 516         return usbi_handle_transfer_completion(itransfer, LIBUSB_TRANSFER_COMPLETED);
 517 }
 518
 519 int
 520 obsd_clock_gettime(int clkid, struct timespec *tp)
 521 {
 522         if (clkid == USBI_CLOCK_REALTIME)
 523                 return clock_gettime(CLOCK_REALTIME, tp);
 524
 525         if (clkid == USBI_CLOCK_MONOTONIC)
 526                 return clock_gettime(CLOCK_MONOTONIC, tp);
 527
 528         return (LIBUSB_ERROR_INVALID_PARAM);
 529 }
 530
 531 int
 532 _errno_to_libusb(int err)
 533 {
 534         usbi_dbg("error: %s (%d)", strerror(err), err);
 535
 536         switch (err) {
 537         case EIO:
 538                 return (LIBUSB_ERROR_IO);
 539         case EACCES:
 540                 return (LIBUSB_ERROR_ACCESS);
 541         case ENOENT:
 542                 return (LIBUSB_ERROR_NO_DEVICE);
 543         case ENOMEM:
 544                 return (LIBUSB_ERROR_NO_MEM);
 545         case ETIMEDOUT:
 546                 return (LIBUSB_ERROR_TIMEOUT);
 547         }
 548
 549         return (LIBUSB_ERROR_OTHER);
 550 }
 551
 552 int
 553 _cache_active_config_descriptor(struct libusb_device *dev)
 554 {
 555         struct device_priv *dpriv = (struct device_priv *)dev->os_priv;
 556         struct usb_device_cdesc udc;
 557         struct usb_device_fdesc udf;
 558         unsigned char* buf;
 559         int fd, len, err;
 560
 561         if ((fd = _bus_open(dev->bus_number)) < 0)
 562                 return _errno_to_libusb(errno);
 563
 564         usbi_dbg("fd %d, addr %d", fd, dev->device_address);
 565
 566         udc.udc_bus = dev->bus_number;
 567         udc.udc_addr = dev->device_address;
 568         udc.udc_config_index = USB_CURRENT_CONFIG_INDEX;
 569         if (ioctl(fd, USB_DEVICE_GET_CDESC, &udc) < 0) {
 570                 err = errno;
 571                 close(fd);
 572                 return _errno_to_libusb(errno);
 573         }
 574
 575         usbi_dbg("active bLength %d", udc.udc_desc.bLength);
 576
 577         len = UGETW(udc.udc_desc.wTotalLength);
 578         buf = malloc(len);
 579         if (buf == NULL)
 580                 return (LIBUSB_ERROR_NO_MEM);
 581
 582         udf.udf_bus = dev->bus_number;
 583         udf.udf_addr = dev->device_address;
 584         udf.udf_config_index = udc.udc_config_index;
 585         udf.udf_size = len;
 586         udf.udf_data = buf;
 587
 588         usbi_dbg("index %d, len %d", udf.udf_config_index, len);
 589
 590         if (ioctl(fd, USB_DEVICE_GET_FDESC, &udf) < 0) {
 591                 err = errno;
 592                 close(fd);
 593                 free(buf);
 594                 return _errno_to_libusb(err);
 595         }
 596         close(fd);
 597
 598         if (dpriv->cdesc)
 599                 free(dpriv->cdesc);
 600         dpriv->cdesc = buf;
 601
 602         return (LIBUSB_SUCCESS);
 603 }
 604
 605 int
 606 _sync_control_transfer(struct usbi_transfer *itransfer)
 607 {
 608         struct libusb_transfer *transfer;
 609         struct libusb_control_setup *setup;
 610         struct device_priv *dpriv;
 611         struct usb_ctl_request req;
 612
 613         transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
 614         dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv;
 615         setup = (struct libusb_control_setup *)transfer->buffer;
 616
 617         usbi_dbg("type %x request %x value %x index %d length %d timeout %d",
 618             setup->bmRequestType, setup->bRequest,
 619             libusb_le16_to_cpu(setup->wValue),
 620             libusb_le16_to_cpu(setup->wIndex),
 621             libusb_le16_to_cpu(setup->wLength), transfer->timeout);
 622
 623         req.ucr_addr = transfer->dev_handle->dev->device_address;
 624         req.ucr_request.bmRequestType = setup->bmRequestType;
 625         req.ucr_request.bRequest = setup->bRequest;
 626         /* Don't use USETW, libusb already deals with the endianness */
 627         (*(uint16_t *)req.ucr_request.wValue) = setup->wValue;
 628         (*(uint16_t *)req.ucr_request.wIndex) = setup->wIndex;
 629         (*(uint16_t *)req.ucr_request.wLength) = setup->wLength;
 630         req.ucr_data = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
 631
 632         if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0)
 633                 req.ucr_flags = USBD_SHORT_XFER_OK;
 634
 635         if (dpriv->devname == NULL) {
 636                 /*
 637                  * XXX If the device is not attached to ugen(4) it is
 638                  * XXX still possible to submit a control transfer but
 639                  * XXX with the default timeout only.
 640                  */
 641                 int fd, err;
 642
 643                 if ((fd = _bus_open(transfer->dev_handle->dev->bus_number)) < 0)
 644                         return _errno_to_libusb(errno);
 645
 646                 if ((ioctl(fd, USB_REQUEST, &req)) < 0) {
 647                         err = errno;
 648                         close(fd);
 649                         return _errno_to_libusb(err);
 650                 }
 651                 close(fd);
 652         } else {
 653                 if ((ioctl(dpriv->fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0)
 654                         return _errno_to_libusb(errno);
 655
 656                 if ((ioctl(dpriv->fd, USB_DO_REQUEST, &req)) < 0)
 657                         return _errno_to_libusb(errno);
 658         }
 659
 660         itransfer->transferred = req.ucr_actlen;
 661
 662         usbi_dbg("transferred %d", itransfer->transferred);
 663
 664         return (0);
 665 }
 666
 667 int
 668 _access_endpoint(struct libusb_transfer *transfer)
 669 {
 670         struct handle_priv *hpriv;
 671         struct device_priv *dpriv;
 672         char devnode[16];
 673         int fd, endpt;
 674         mode_t mode;
 675
 676         hpriv = (struct handle_priv *)transfer->dev_handle->os_priv;
 677         dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv;
 678
 679         endpt = UE_GET_ADDR(transfer->endpoint);
 680         mode = IS_XFERIN(transfer) ? O_RDONLY : O_WRONLY;
 681
 682         usbi_dbg("endpoint %d mode %d", endpt, mode);
 683
 684         if (hpriv->endpoints[endpt] < 0) {
 685                 /* Pick the right endpoint node */
 686                 snprintf(devnode, sizeof(devnode), DEVPATH "%s.%02d",
 687                     dpriv->devname, endpt);
 688
 689                 /* We may need to read/write to the same endpoint later. */
 690                 if (((fd = open(devnode, O_RDWR)) < 0) && (errno == ENXIO))
 691                         if ((fd = open(devnode, mode)) < 0)
 692                                 return (-1);
 693
 694                 hpriv->endpoints[endpt] = fd;
 695         }
 696
 697         return (hpriv->endpoints[endpt]);
 698 }
 699
 700 int
 701 _sync_gen_transfer(struct usbi_transfer *itransfer)
 702 {
 703         struct libusb_transfer *transfer;
 704         struct device_priv *dpriv;
 705         int fd, nr = 1;
 706
 707         transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
 708         dpriv = (struct device_priv *)transfer->dev_handle->dev->os_priv;
 709
 710         if (dpriv->devname == NULL)
 711                 return (LIBUSB_ERROR_NOT_SUPPORTED);
 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 }
 740
 741 int
 742 _bus_open(int number)
 743 {
 744         char busnode[16];
 745
 746         snprintf(busnode, sizeof(busnode), USBDEV "%d", number);
 747
 748         return open(busnode, O_RDWR);
 749 }