sys/dev/usb/if_cdce.c

   1 /*      $NetBSD: if_cdce.c,v 1.4 2004/10/24 12:50:54 augustss Exp $ */
   2
   3 /*
   4  * Copyright (c) 1997, 1998, 1999, 2000-2003 Bill Paul <wpaul@windriver.com>
   5  * Copyright (c) 2003-2005 Craig Boston
   6  * Copyright (c) 2004 Daniel Hartmeier
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Bill Paul.
  20  * 4. Neither the name of the author nor the names of any co-contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul, THE VOICES IN HIS HEAD OR
  28  * THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  30  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  31  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  32  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  33  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  34  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 /*
  38  * USB Communication Device Class (Ethernet Networking Control Model)
  39  * http://www.usb.org/developers/devclass_docs/usbcdc11.pdf
  40  */
  41
  42 #include <sys/cdefs.h>
  43 __FBSDID("$FreeBSD$");
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/sockio.h>
  48 #include <sys/mbuf.h>
  49 #include <sys/malloc.h>
  50 #include <sys/kernel.h>
  51 #include <sys/module.h>
  52 #include <sys/socket.h>
  53 #include <sys/endian.h>
  54
  55 #include <net/if.h>
  56 #include <net/if_arp.h>
  57 #include <net/ethernet.h>
  58 #include <net/if_types.h>
  59 #include <net/if_media.h>
  60
  61 #include <net/bpf.h>
  62
  63 #include <sys/bus.h>
  64 #include <machine/bus.h>
  65
  66 #include <dev/usb/usb.h>
  67 #include <dev/usb/usbdi.h>
  68 #include <dev/usb/usbdi_util.h>
  69 #include <dev/usb/usbdivar.h>
  70 #include <dev/usb/usb_ethersubr.h>
  71
  72 #include <dev/usb/usbcdc.h>
  73 #include "usbdevs.h"
  74 #include <dev/usb/if_cdcereg.h>
  75
  76 static device_shutdown_t cdce_shutdown;
  77 USB_DECLARE_DRIVER_INIT(cdce,
  78         DEVMETHOD(device_probe, cdce_match),
  79         DEVMETHOD(device_attach, cdce_attach),
  80         DEVMETHOD(device_detach, cdce_detach),
  81         DEVMETHOD(device_shutdown, cdce_shutdown)
  82         );
  83 DRIVER_MODULE(cdce, uhub, cdce_driver, cdce_devclass, usbd_driver_load, 0);
  84 MODULE_VERSION(cdce, 0);
  85
  86 static int       cdce_encap(struct cdce_softc *, struct mbuf *, int);
  87 static void      cdce_rxeof(usbd_xfer_handle, usbd_private_handle, usbd_status);
  88 static void      cdce_txeof(usbd_xfer_handle, usbd_private_handle, usbd_status);
  89 static void      cdce_start(struct ifnet *);
  90 static int       cdce_ioctl(struct ifnet *, u_long, caddr_t);
  91 static void      cdce_init(void *);
  92 static void      cdce_reset(struct cdce_softc *);
  93 static void      cdce_stop(struct cdce_softc *);
  94 static void      cdce_rxstart(struct ifnet *);
  95 static int       cdce_ifmedia_upd(struct ifnet *ifp);
  96 static void      cdce_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
  97
  98 static const struct cdce_type cdce_devs[] = {
  99   {{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2501 }, CDCE_NO_UNION },
 100   {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5500 }, CDCE_ZAURUS },
 101   {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SLA300 }, CDCE_ZAURUS | CDCE_NO_UNION },
 102   {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5600 }, CDCE_ZAURUS | CDCE_NO_UNION },
 103   {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SLC700 }, CDCE_ZAURUS | CDCE_NO_UNION },
 104   {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SLC750 }, CDCE_ZAURUS | CDCE_NO_UNION },
 105   {{ USB_VENDOR_GMATE, USB_PRODUCT_GMATE_YP3X00 }, CDCE_NO_UNION },
 106   {{ USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_ETHERNETGADGET }, CDCE_NO_UNION },
 107   {{ USB_VENDOR_COMPAQ, USB_PRODUCT_COMPAQ_IPAQLINUX }, CDCE_NO_UNION },
 108 };
 109 #define cdce_lookup(v, p) ((const struct cdce_type *)usb_lookup(cdce_devs, v, p))
 110
 111 static int
 112 cdce_match(device_t self)
 113 {
 114         USB_MATCH_START(cdce, uaa);
 115         usb_interface_descriptor_t *id;
 116
 117         if (uaa->iface == NULL)
 118                 return (UMATCH_NONE);
 119
 120         id = usbd_get_interface_descriptor(uaa->iface);
 121         if (id == NULL)
 122                 return (UMATCH_NONE);
 123
 124         if (cdce_lookup(uaa->vendor, uaa->product) != NULL)
 125                 return (UMATCH_VENDOR_PRODUCT);
 126
 127         if (id->bInterfaceClass == UICLASS_CDC && id->bInterfaceSubClass ==
 128             UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL)
 129                 return (UMATCH_IFACECLASS_GENERIC);
 130
 131         return (UMATCH_NONE);
 132 }
 133
 134 static int
 135 cdce_attach(device_t self)
 136 {
 137         USB_ATTACH_START(cdce, sc, uaa);
 138         struct ifnet                    *ifp;
 139         usbd_device_handle               dev = uaa->device;
 140         const struct cdce_type          *t;
 141         usb_interface_descriptor_t      *id;
 142         usb_endpoint_descriptor_t       *ed;
 143         const usb_cdc_union_descriptor_t *ud;
 144         usb_config_descriptor_t         *cd;
 145         int                              data_ifcno;
 146         int                              i, j, numalts;
 147         u_char                           eaddr[ETHER_ADDR_LEN];
 148         const usb_cdc_ethernet_descriptor_t *ue;
 149         char                             eaddr_str[USB_MAX_STRING_LEN];
 150
 151         sc->cdce_dev = self;
 152         sc->cdce_udev = uaa->device;
 153
 154         t = cdce_lookup(uaa->vendor, uaa->product);
 155         if (t)
 156                 sc->cdce_flags = t->cdce_flags;
 157
 158         if (sc->cdce_flags & CDCE_NO_UNION)
 159                 sc->cdce_data_iface = uaa->iface;
 160         else {
 161                 ud = (const usb_cdc_union_descriptor_t *)usb_find_desc(sc->cdce_udev,
 162                     UDESC_CS_INTERFACE, UDESCSUB_CDC_UNION);
 163                 if (ud == NULL) {
 164                         device_printf(sc->cdce_dev, "no union descriptor\n");
 165                         return ENXIO;
 166                 }
 167                 data_ifcno = ud->bSlaveInterface[0];
 168
 169                 for (i = 0; i < uaa->nifaces; i++) {
 170                         if (uaa->ifaces[i] != NULL) {
 171                                 id = usbd_get_interface_descriptor(
 172                                     uaa->ifaces[i]);
 173                                 if (id != NULL && id->bInterfaceNumber ==
 174                                     data_ifcno) {
 175                                         sc->cdce_data_iface = uaa->ifaces[i];
 176                                         uaa->ifaces[i] = NULL;
 177                                 }
 178                         }
 179                 }
 180         }
 181
 182         if (sc->cdce_data_iface == NULL) {
 183                 device_printf(sc->cdce_dev, "no data interface\n");
 184                 return ENXIO;
 185         }
 186
 187         /*
 188          * <quote>
 189          *  The Data Class interface of a networking device shall have a minimum
 190          *  of two interface settings. The first setting (the default interface
 191          *  setting) includes no endpoints and therefore no networking traffic is
 192          *  exchanged whenever the default interface setting is selected. One or
 193          *  more additional interface settings are used for normal operation, and
 194          *  therefore each includes a pair of endpoints (one IN, and one OUT) to
 195          *  exchange network traffic. Select an alternate interface setting to
 196          *  initialize the network aspects of the device and to enable the
 197          *  exchange of network traffic.
 198          * </quote>
 199          *
 200          * Some devices, most notably cable modems, include interface settings
 201          * that have no IN or OUT endpoint, therefore loop through the list of all
 202          * available interface settings looking for one with both IN and OUT
 203          * endpoints.
 204          */
 205         id = usbd_get_interface_descriptor(sc->cdce_data_iface);
 206         cd = usbd_get_config_descriptor(sc->cdce_udev);
 207         numalts = usbd_get_no_alts(cd, id->bInterfaceNumber);
 208
 209         for (j = 0; j < numalts; j++) {
 210                 if (usbd_set_interface(sc->cdce_data_iface, j)) {
 211                         device_printf(sc->cdce_dev,
 212                             "setting alternate interface failed\n");
 213                         return ENXIO;
 214                 }
 215                 /* Find endpoints. */
 216                 id = usbd_get_interface_descriptor(sc->cdce_data_iface);
 217                 sc->cdce_bulkin_no = sc->cdce_bulkout_no = -1;
 218                 for (i = 0; i < id->bNumEndpoints; i++) {
 219                         ed = usbd_interface2endpoint_descriptor(sc->cdce_data_iface, i);
 220                         if (!ed) {
 221                                 device_printf(sc->cdce_dev,
 222                                     "could not read endpoint descriptor\n");
 223                                 return ENXIO;
 224                         }
 225                         if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
 226                             UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
 227                                 sc->cdce_bulkin_no = ed->bEndpointAddress;
 228                         } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
 229                             UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
 230                                 sc->cdce_bulkout_no = ed->bEndpointAddress;
 231                         } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
 232                             UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
 233                                 /* XXX: CDC spec defines an interrupt pipe, but it is not
 234                                  * needed for simple host-to-host applications. */
 235                         } else {
 236                                 device_printf(sc->cdce_dev,
 237                                     "unexpected endpoint\n");
 238                         }
 239                 }
 240                 /* If we found something, try and use it... */
 241                 if ((sc->cdce_bulkin_no != -1) && (sc->cdce_bulkout_no != -1))
 242                         break;
 243         }
 244
 245         if (sc->cdce_bulkin_no == -1) {
 246                 device_printf(sc->cdce_dev, "could not find data bulk in\n");
 247                 return ENXIO;
 248         }
 249         if (sc->cdce_bulkout_no == -1 ) {
 250                 device_printf(sc->cdce_dev, "could not find data bulk out\n");
 251                 return ENXIO;
 252         }
 253
 254         mtx_init(&sc->cdce_mtx, device_get_nameunit(sc->cdce_dev), MTX_NETWORK_LOCK,
 255             MTX_DEF | MTX_RECURSE);
 256         ifmedia_init(&sc->cdce_ifmedia, 0, cdce_ifmedia_upd, cdce_ifmedia_sts);
 257         CDCE_LOCK(sc);
 258
 259         ue = (const usb_cdc_ethernet_descriptor_t *)usb_find_desc(dev,
 260             UDESC_INTERFACE, UDESCSUB_CDC_ENF);
 261         if (!ue || usbd_get_string(dev, ue->iMacAddress, eaddr_str)) {
 262                 /* Fake MAC address */
 263                 device_printf(sc->cdce_dev, "faking MAC address\n");
 264                 eaddr[0]= 0x2a;
 265                 memcpy(&eaddr[1], &ticks, sizeof(u_int32_t));
 266                 eaddr[5] = (u_int8_t)device_get_unit(sc->cdce_dev);
 267         } else {
 268                 int i;
 269
 270                 memset(eaddr, 0, ETHER_ADDR_LEN);
 271                 for (i = 0; i < ETHER_ADDR_LEN * 2; i++) {
 272                         int c = eaddr_str[i];
 273
 274                         if ('0' <= c && c <= '9')
 275                                 c -= '0';
 276                         else
 277                                 c -= 'A' - 10;
 278                         c &= 0xf;
 279                         if (c % 2 == 0)
 280                                 c <<= 4;
 281                         eaddr[i / 2] |= c;
 282                 }
 283         }
 284
 285         ifp = GET_IFP(sc) = if_alloc(IFT_ETHER);
 286         if (ifp == NULL) {
 287                 device_printf(sc->cdce_dev, "can not if_alloc()\n");
 288                 CDCE_UNLOCK(sc);
 289                 mtx_destroy(&sc->cdce_mtx);
 290                 return ENXIO;
 291         }
 292         ifp->if_softc = sc;
 293         if_initname(ifp, "cdce", device_get_unit(sc->cdce_dev));
 294         ifp->if_mtu = ETHERMTU;
 295         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST |
 296                 IFF_NEEDSGIANT;
 297         ifp->if_ioctl = cdce_ioctl;
 298         ifp->if_output = ether_output;
 299         ifp->if_start = cdce_start;
 300         ifp->if_init = cdce_init;
 301         ifp->if_baudrate = 11000000;
 302         ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
 303
 304         sc->q.ifp = ifp;
 305         sc->q.if_rxstart = cdce_rxstart;
 306
 307         /* No IFM type for 11Mbps USB, so go with 10baseT */
 308         ifmedia_add(&sc->cdce_ifmedia, IFM_ETHER | IFM_10_T, 0, 0);
 309         ifmedia_set(&sc->cdce_ifmedia, IFM_ETHER | IFM_10_T);
 310
 311         ether_ifattach(ifp, eaddr);
 312         usb_register_netisr();
 313
 314         CDCE_UNLOCK(sc);
 315
 316         usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->cdce_udev,
 317           sc->cdce_dev);
 318
 319         return 0;
 320 }
 321
 322 static int
 323 cdce_detach(device_t self)
 324 {
 325         USB_DETACH_START(cdce, sc);
 326         struct ifnet    *ifp;
 327
 328         CDCE_LOCK(sc);
 329         sc->cdce_dying = 1;
 330         ifp = GET_IFP(sc);
 331         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 332                 cdce_shutdown(sc->cdce_dev);
 333
 334         ether_ifdetach(ifp);
 335         if_free(ifp);
 336         ifmedia_removeall(&sc->cdce_ifmedia);
 337         CDCE_UNLOCK(sc);
 338         mtx_destroy(&sc->cdce_mtx);
 339
 340         usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->cdce_udev,
 341           sc->cdce_dev);
 342
 343         return (0);
 344 }
 345
 346 static void
 347 cdce_start(struct ifnet *ifp)
 348 {
 349         struct cdce_softc       *sc;
 350         struct mbuf             *m_head = NULL;
 351
 352         sc = ifp->if_softc;
 353         CDCE_LOCK(sc);
 354
 355
 356         if (sc->cdce_dying ||
 357                 ifp->if_drv_flags & IFF_DRV_OACTIVE ||
 358                 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 359                 CDCE_UNLOCK(sc);
 360                 return;
 361         }
 362
 363         IF_DEQUEUE(&ifp->if_snd, m_head);
 364         if (m_head == NULL) {
 365                 CDCE_UNLOCK(sc);
 366                 return;
 367         }
 368
 369         if (cdce_encap(sc, m_head, 0)) {
 370                 IF_PREPEND(&ifp->if_snd, m_head);
 371                 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 372                 CDCE_UNLOCK(sc);
 373                 return;
 374         }
 375
 376         BPF_MTAP(ifp, m_head);
 377
 378         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 379
 380         CDCE_UNLOCK(sc);
 381
 382         return;
 383 }
 384
 385 static int
 386 cdce_encap(struct cdce_softc *sc, struct mbuf *m, int idx)
 387 {
 388         struct ue_chain *c;
 389         usbd_status              err;
 390         int                      extra = 0;
 391
 392         c = &sc->cdce_cdata.ue_tx_chain[idx];
 393
 394         m_copydata(m, 0, m->m_pkthdr.len, c->ue_buf);
 395         if (sc->cdce_flags & CDCE_ZAURUS) {
 396                 /* Zaurus wants a 32-bit CRC appended to every frame */
 397                 u_int32_t crc;
 398
 399                 crc = htole32(crc32(c->ue_buf, m->m_pkthdr.len));
 400                 bcopy(&crc, c->ue_buf + m->m_pkthdr.len, 4);
 401                 extra = 4;
 402         }
 403         c->ue_mbuf = m;
 404
 405         usbd_setup_xfer(c->ue_xfer, sc->cdce_bulkout_pipe, c, c->ue_buf,
 406             m->m_pkthdr.len + extra, 0, 10000, cdce_txeof);
 407         err = usbd_transfer(c->ue_xfer);
 408         if (err != USBD_IN_PROGRESS) {
 409                 cdce_stop(sc);
 410                 return (EIO);
 411         }
 412
 413         sc->cdce_cdata.ue_tx_cnt++;
 414
 415         return (0);
 416 }
 417
 418 static void
 419 cdce_stop(struct cdce_softc *sc)
 420 {
 421         usbd_status      err;
 422         struct ifnet    *ifp;
 423
 424         CDCE_LOCK(sc);
 425
 426         cdce_reset(sc);
 427
 428         ifp = GET_IFP(sc);
 429         ifp->if_timer = 0;
 430
 431         if (sc->cdce_bulkin_pipe != NULL) {
 432                 err = usbd_abort_pipe(sc->cdce_bulkin_pipe);
 433                 if (err)
 434                         device_printf(sc->cdce_dev,
 435                             "abort rx pipe failed: %s\n", usbd_errstr(err));
 436                 err = usbd_close_pipe(sc->cdce_bulkin_pipe);
 437                 if (err)
 438                         device_printf(sc->cdce_dev,
 439                             "close rx pipe failed: %s\n", usbd_errstr(err));
 440                 sc->cdce_bulkin_pipe = NULL;
 441         }
 442
 443         if (sc->cdce_bulkout_pipe != NULL) {
 444                 err = usbd_abort_pipe(sc->cdce_bulkout_pipe);
 445                 if (err)
 446                         device_printf(sc->cdce_dev,
 447                             "abort tx pipe failed: %s\n", usbd_errstr(err));
 448                 err = usbd_close_pipe(sc->cdce_bulkout_pipe);
 449                 if (err)
 450                         device_printf(sc->cdce_dev,
 451                             "close tx pipe failed: %s\n", usbd_errstr(err));
 452                 sc->cdce_bulkout_pipe = NULL;
 453         }
 454
 455         usb_ether_rx_list_free(&sc->cdce_cdata);
 456         usb_ether_tx_list_free(&sc->cdce_cdata);
 457
 458         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 459         CDCE_UNLOCK(sc);
 460
 461         return;
 462 }
 463
 464 static int
 465 cdce_shutdown(device_t dev)
 466 {
 467         struct cdce_softc *sc;
 468
 469         sc = device_get_softc(dev);
 470         cdce_stop(sc);
 471
 472         return (0);
 473 }
 474
 475 static int
 476 cdce_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 477 {
 478         struct cdce_softc       *sc = ifp->if_softc;
 479         struct ifreq            *ifr = (struct ifreq *)data;
 480         int                      error = 0;
 481
 482         if (sc->cdce_dying)
 483                 return (ENXIO);
 484
 485         switch(command) {
 486         case SIOCSIFFLAGS:
 487                 if (ifp->if_flags & IFF_UP) {
 488                         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 489                                 cdce_init(sc);
 490                 } else {
 491                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 492                                 cdce_stop(sc);
 493                 }
 494                 error = 0;
 495                 break;
 496
 497         case SIOCSIFMEDIA:
 498         case SIOCGIFMEDIA:
 499                 error = ifmedia_ioctl(ifp, ifr, &sc->cdce_ifmedia, command);
 500                 break;
 501
 502         default:
 503                 error = ether_ioctl(ifp, command, data);
 504                 break;
 505         }
 506
 507         return (error);
 508 }
 509
 510 static void
 511 cdce_reset(struct cdce_softc *sc)
 512 {
 513         /* XXX Maybe reset the bulk pipes here? */
 514         return;
 515 }
 516
 517 static void
 518 cdce_init(void *xsc)
 519 {
 520         struct cdce_softc       *sc = xsc;
 521         struct ifnet            *ifp = GET_IFP(sc);
 522         struct ue_chain *c;
 523         usbd_status              err;
 524         int                      i;
 525
 526         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 527                 return;
 528
 529         CDCE_LOCK(sc);
 530         cdce_reset(sc);
 531
 532         if (usb_ether_tx_list_init(sc, &sc->cdce_cdata,
 533             sc->cdce_udev) == ENOBUFS) {
 534                 device_printf(sc->cdce_dev, "tx list init failed\n");
 535                 CDCE_UNLOCK(sc);
 536                 return;
 537         }
 538
 539         if (usb_ether_rx_list_init(sc, &sc->cdce_cdata,
 540             sc->cdce_udev) == ENOBUFS) {
 541                 device_printf(sc->cdce_dev, "rx list init failed\n");
 542                 CDCE_UNLOCK(sc);
 543                 return;
 544         }
 545
 546         /* Maybe set multicast / broadcast here??? */
 547
 548         err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkin_no,
 549             USBD_EXCLUSIVE_USE, &sc->cdce_bulkin_pipe);
 550         if (err) {
 551                 device_printf(sc->cdce_dev, "open rx pipe failed: %s\n",
 552                     usbd_errstr(err));
 553                 CDCE_UNLOCK(sc);
 554                 return;
 555         }
 556
 557         err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkout_no,
 558             USBD_EXCLUSIVE_USE, &sc->cdce_bulkout_pipe);
 559         if (err) {
 560                 device_printf(sc->cdce_dev, "open tx pipe failed: %s\n",
 561                     usbd_errstr(err));
 562                 CDCE_UNLOCK(sc);
 563                 return;
 564         }
 565
 566         for (i = 0; i < UE_RX_LIST_CNT; i++) {
 567                 c = &sc->cdce_cdata.ue_rx_chain[i];
 568                 usbd_setup_xfer(c->ue_xfer, sc->cdce_bulkin_pipe, c,
 569                     mtod(c->ue_mbuf, char *), UE_BUFSZ, USBD_SHORT_XFER_OK,
 570                     USBD_NO_TIMEOUT, cdce_rxeof);
 571                 usbd_transfer(c->ue_xfer);
 572         }
 573
 574         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 575         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 576
 577         CDCE_UNLOCK(sc);
 578
 579         return;
 580 }
 581
 582 static void
 583 cdce_rxeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
 584 {
 585         struct ue_chain *c = priv;
 586         struct cdce_softc       *sc = c->ue_sc;
 587         struct ifnet            *ifp;
 588         struct mbuf             *m;
 589         int                      total_len = 0;
 590
 591         CDCE_LOCK(sc);
 592         ifp = GET_IFP(sc);
 593
 594         if (sc->cdce_dying || !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 595                 CDCE_UNLOCK(sc);
 596                 return;
 597         }
 598
 599         if (status != USBD_NORMAL_COMPLETION) {
 600                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
 601                         CDCE_UNLOCK(sc);
 602                         return;
 603                 }
 604                 if (sc->cdce_rxeof_errors == 0)
 605                         device_printf(sc->cdce_dev, "usb error on rx: %s\n",
 606                             usbd_errstr(status));
 607                 if (status == USBD_STALLED)
 608                         usbd_clear_endpoint_stall_async(sc->cdce_bulkin_pipe);
 609                 DELAY(sc->cdce_rxeof_errors * 10000);
 610                 sc->cdce_rxeof_errors++;
 611                 goto done;
 612         }
 613
 614         sc->cdce_rxeof_errors = 0;
 615
 616         usbd_get_xfer_status(xfer, NULL, NULL, &total_len, NULL);
 617
 618         if (sc->cdce_flags & CDCE_ZAURUS)
 619                 total_len -= 4; /* Strip off CRC added by Zaurus */
 620
 621         m = c->ue_mbuf;
 622
 623         if (total_len < sizeof(struct ether_header)) {
 624                 ifp->if_ierrors++;
 625                 goto done;
 626         }
 627
 628         ifp->if_ipackets++;
 629         m->m_pkthdr.rcvif = (struct ifnet *)&sc->q;
 630         m->m_pkthdr.len = m->m_len = total_len;
 631
 632         /* Put the packet on the special USB input queue. */
 633         usb_ether_input(m);
 634         CDCE_UNLOCK(sc);
 635
 636         return;
 637
 638 done:
 639         /* Setup new transfer. */
 640         usbd_setup_xfer(c->ue_xfer, sc->cdce_bulkin_pipe, c,
 641             mtod(c->ue_mbuf, char *),
 642             UE_BUFSZ, USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT,
 643             cdce_rxeof);
 644         usbd_transfer(c->ue_xfer);
 645         CDCE_UNLOCK(sc);
 646
 647         return;
 648 }
 649
 650 static void
 651 cdce_txeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
 652 {
 653         struct ue_chain *c = priv;
 654         struct cdce_softc       *sc = c->ue_sc;
 655         struct ifnet            *ifp;
 656         usbd_status              err;
 657
 658         CDCE_LOCK(sc);
 659         ifp = GET_IFP(sc);
 660
 661         if (sc->cdce_dying ||
 662                 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 663                 CDCE_UNLOCK(sc);
 664                 return;
 665         }
 666
 667         if (status != USBD_NORMAL_COMPLETION) {
 668                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
 669                         CDCE_UNLOCK(sc);
 670                         return;
 671                 }
 672                 ifp->if_oerrors++;
 673                 device_printf(sc->cdce_dev, "usb error on tx: %s\n",
 674                     usbd_errstr(status));
 675                 if (status == USBD_STALLED)
 676                         usbd_clear_endpoint_stall_async(sc->cdce_bulkout_pipe);
 677                 CDCE_UNLOCK(sc);
 678                 return;
 679         }
 680
 681         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 682         usbd_get_xfer_status(c->ue_xfer, NULL, NULL, NULL, &err);
 683
 684         if (c->ue_mbuf != NULL) {
 685                 c->ue_mbuf->m_pkthdr.rcvif = ifp;
 686                 usb_tx_done(c->ue_mbuf);
 687                 c->ue_mbuf = NULL;
 688         }
 689
 690         if (err)
 691                 ifp->if_oerrors++;
 692         else
 693                 ifp->if_opackets++;
 694
 695         CDCE_UNLOCK(sc);
 696
 697         return;
 698 }
 699
 700 static void
 701 cdce_rxstart(struct ifnet *ifp)
 702 {
 703         struct cdce_softc   *sc;
 704         struct ue_chain   *c;
 705
 706         sc = ifp->if_softc;
 707         CDCE_LOCK(sc);
 708
 709         if (sc->cdce_dying || !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 710                 CDCE_UNLOCK(sc);
 711                 return;
 712         }
 713
 714         c = &sc->cdce_cdata.ue_rx_chain[sc->cdce_cdata.ue_rx_prod];
 715
 716         c->ue_mbuf = usb_ether_newbuf();
 717         if (c->ue_mbuf == NULL) {
 718                 device_printf(sc->cdce_dev, "no memory for rx list "
 719                     "-- packet dropped!\n");
 720                 ifp->if_ierrors++;
 721                 CDCE_UNLOCK(sc);
 722                 return;
 723         }
 724
 725         usbd_setup_xfer(c->ue_xfer, sc->cdce_bulkin_pipe, c,
 726             mtod(c->ue_mbuf, char *), UE_BUFSZ, USBD_SHORT_XFER_OK,
 727             USBD_NO_TIMEOUT, cdce_rxeof);
 728         usbd_transfer(c->ue_xfer);
 729
 730         CDCE_UNLOCK(sc);
 731         return;
 732 }
 733
 734 static int
 735 cdce_ifmedia_upd(struct ifnet *ifp)
 736 {
 737
 738         /* no-op, cdce has only 1 possible media type */
 739         return 0;
 740 }
 741
 742 static void
 743 cdce_ifmedia_sts(struct ifnet * const ifp, struct ifmediareq *req)
 744 {
 745
 746         req->ifm_status = IFM_AVALID | IFM_ACTIVE;
 747         req->ifm_active = IFM_ETHER | IFM_10_T;
 748 }