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 USB_MATCH(cdce)
 112 {
 113         USB_MATCH_START(cdce, uaa);
 114         usb_interface_descriptor_t *id;
 115
 116         if (uaa->iface == NULL)
 117                 return (UMATCH_NONE);
 118
 119         id = usbd_get_interface_descriptor(uaa->iface);
 120         if (id == NULL)
 121                 return (UMATCH_NONE);
 122
 123         if (cdce_lookup(uaa->vendor, uaa->product) != NULL)
 124                 return (UMATCH_VENDOR_PRODUCT);
 125
 126         if (id->bInterfaceClass == UICLASS_CDC && id->bInterfaceSubClass ==
 127             UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL)
 128                 return (UMATCH_IFACECLASS_GENERIC);
 129
 130         return (UMATCH_NONE);
 131 }
 132
 133 USB_ATTACH(cdce)
 134 {
 135         USB_ATTACH_START(cdce, sc, uaa);
 136         struct ifnet                    *ifp;
 137         usbd_device_handle               dev = uaa->device;
 138         const struct cdce_type          *t;
 139         usb_interface_descriptor_t      *id;
 140         usb_endpoint_descriptor_t       *ed;
 141         const usb_cdc_union_descriptor_t *ud;
 142         usb_config_descriptor_t         *cd;
 143         int                              data_ifcno;
 144         int                              i, j, numalts;
 145         u_char                           eaddr[ETHER_ADDR_LEN];
 146         const usb_cdc_ethernet_descriptor_t *ue;
 147         char                             eaddr_str[USB_MAX_STRING_LEN];
 148
 149         bzero(sc, sizeof(struct cdce_softc));
 150         sc->cdce_dev = self;
 151         usbd_devinfo(dev, 0, sc->devinfo);
 152         device_set_desc_copy(self, sc->devinfo);
 153         printf("%s: %s\n", device_get_nameunit(sc->cdce_dev), sc->devinfo);
 154
 155         sc->cdce_udev = uaa->device;
 156         sc->cdce_unit = device_get_unit(self);
 157
 158         t = cdce_lookup(uaa->vendor, uaa->product);
 159         if (t)
 160                 sc->cdce_flags = t->cdce_flags;
 161
 162         if (sc->cdce_flags & CDCE_NO_UNION)
 163                 sc->cdce_data_iface = uaa->iface;
 164         else {
 165                 ud = (const usb_cdc_union_descriptor_t *)usb_find_desc(sc->cdce_udev,
 166                     UDESC_CS_INTERFACE, UDESCSUB_CDC_UNION);
 167                 if (ud == NULL) {
 168                         printf("%s: no union descriptor\n",
 169                             device_get_nameunit(sc->cdce_dev));
 170                         USB_ATTACH_ERROR_RETURN;
 171                 }
 172                 data_ifcno = ud->bSlaveInterface[0];
 173
 174                 for (i = 0; i < uaa->nifaces; i++) {
 175                         if (uaa->ifaces[i] != NULL) {
 176                                 id = usbd_get_interface_descriptor(
 177                                     uaa->ifaces[i]);
 178                                 if (id != NULL && id->bInterfaceNumber ==
 179                                     data_ifcno) {
 180                                         sc->cdce_data_iface = uaa->ifaces[i];
 181                                         uaa->ifaces[i] = NULL;
 182                                 }
 183                         }
 184                 }
 185         }
 186
 187         if (sc->cdce_data_iface == NULL) {
 188                 printf("%s: no data interface\n", device_get_nameunit(sc->cdce_dev));
 189                 USB_ATTACH_ERROR_RETURN;
 190         }
 191
 192         /*
 193          * <quote>
 194          *  The Data Class interface of a networking device shall have a minimum
 195          *  of two interface settings. The first setting (the default interface
 196          *  setting) includes no endpoints and therefore no networking traffic is
 197          *  exchanged whenever the default interface setting is selected. One or
 198          *  more additional interface settings are used for normal operation, and
 199          *  therefore each includes a pair of endpoints (one IN, and one OUT) to
 200          *  exchange network traffic. Select an alternate interface setting to
 201          *  initialize the network aspects of the device and to enable the
 202          *  exchange of network traffic.
 203          * </quote>
 204          *
 205          * Some devices, most notably cable modems, include interface settings
 206          * that have no IN or OUT endpoint, therefore loop through the list of all
 207          * available interface settings looking for one with both IN and OUT
 208          * endpoints.
 209          */
 210         id = usbd_get_interface_descriptor(sc->cdce_data_iface);
 211         cd = usbd_get_config_descriptor(sc->cdce_udev);
 212         numalts = usbd_get_no_alts(cd, id->bInterfaceNumber);
 213
 214         for (j = 0; j < numalts; j++) {
 215                 if (usbd_set_interface(sc->cdce_data_iface, j)) {
 216                         printf("%s: setting alternate interface failed\n",
 217                             device_get_nameunit(sc->cdce_dev));
 218                         USB_ATTACH_ERROR_RETURN;
 219                 }
 220                 /* Find endpoints. */
 221                 id = usbd_get_interface_descriptor(sc->cdce_data_iface);
 222                 sc->cdce_bulkin_no = sc->cdce_bulkout_no = -1;
 223                 for (i = 0; i < id->bNumEndpoints; i++) {
 224                         ed = usbd_interface2endpoint_descriptor(sc->cdce_data_iface, i);
 225                         if (!ed) {
 226                                 printf("%s: could not read endpoint descriptor\n",
 227                                     device_get_nameunit(sc->cdce_dev));
 228                                 USB_ATTACH_ERROR_RETURN;
 229                         }
 230                         if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
 231                             UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
 232                                 sc->cdce_bulkin_no = ed->bEndpointAddress;
 233                         } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
 234                             UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
 235                                 sc->cdce_bulkout_no = ed->bEndpointAddress;
 236                         } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
 237                             UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
 238                                 /* XXX: CDC spec defines an interrupt pipe, but it is not
 239                                  * needed for simple host-to-host applications. */
 240                         } else {
 241                                 printf("%s: unexpected endpoint\n",
 242                                     device_get_nameunit(sc->cdce_dev));
 243                         }
 244                 }
 245                 /* If we found something, try and use it... */
 246                 if ((sc->cdce_bulkin_no != -1) && (sc->cdce_bulkout_no != -1))
 247                         break;
 248         }
 249
 250         if (sc->cdce_bulkin_no == -1) {
 251                 printf("%s: could not find data bulk in\n",
 252                     device_get_nameunit(sc->cdce_dev));
 253                 USB_ATTACH_ERROR_RETURN;
 254         }
 255         if (sc->cdce_bulkout_no == -1 ) {
 256                 printf("%s: could not find data bulk out\n",
 257                     device_get_nameunit(sc->cdce_dev));
 258                 USB_ATTACH_ERROR_RETURN;
 259         }
 260
 261         mtx_init(&sc->cdce_mtx, device_get_nameunit(sc->cdce_dev), MTX_NETWORK_LOCK,
 262             MTX_DEF | MTX_RECURSE);
 263         ifmedia_init(&sc->cdce_ifmedia, 0, cdce_ifmedia_upd, cdce_ifmedia_sts);
 264         CDCE_LOCK(sc);
 265
 266         ue = (const usb_cdc_ethernet_descriptor_t *)usb_find_desc(dev,
 267             UDESC_INTERFACE, UDESCSUB_CDC_ENF);
 268         if (!ue || usbd_get_string(dev, ue->iMacAddress, eaddr_str)) {
 269                 /* Fake MAC address */
 270                 printf("%s: faking MAC address\n", device_get_nameunit(sc->cdce_dev));
 271                 eaddr[0]= 0x2a;
 272                 memcpy(&eaddr[1], &ticks, sizeof(u_int32_t));
 273                 eaddr[5] = (u_int8_t)(sc->cdce_unit);
 274         } else {
 275                 int i;
 276
 277                 memset(eaddr, 0, ETHER_ADDR_LEN);
 278                 for (i = 0; i < ETHER_ADDR_LEN * 2; i++) {
 279                         int c = eaddr_str[i];
 280
 281                         if ('0' <= c && c <= '9')
 282                                 c -= '0';
 283                         else
 284                                 c -= 'A' - 10;
 285                         c &= 0xf;
 286                         if (c % 2 == 0)
 287                                 c <<= 4;
 288                         eaddr[i / 2] |= c;
 289                 }
 290         }
 291
 292         ifp = GET_IFP(sc) = if_alloc(IFT_ETHER);
 293         if (ifp == NULL) {
 294                 printf("%s: can not if_alloc()\n", device_get_nameunit(sc->cdce_dev));
 295                 CDCE_UNLOCK(sc);
 296                 mtx_destroy(&sc->cdce_mtx);
 297                 USB_ATTACH_ERROR_RETURN;
 298         }
 299         ifp->if_softc = sc;
 300         if_initname(ifp, "cdce", sc->cdce_unit);
 301         ifp->if_mtu = ETHERMTU;
 302         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST |
 303                 IFF_NEEDSGIANT;
 304         ifp->if_ioctl = cdce_ioctl;
 305         ifp->if_output = ether_output;
 306         ifp->if_start = cdce_start;
 307         ifp->if_init = cdce_init;
 308         ifp->if_baudrate = 11000000;
 309         ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
 310
 311         sc->q.ifp = ifp;
 312         sc->q.if_rxstart = cdce_rxstart;
 313
 314         /* No IFM type for 11Mbps USB, so go with 10baseT */
 315         ifmedia_add(&sc->cdce_ifmedia, IFM_ETHER | IFM_10_T, 0, 0);
 316         ifmedia_set(&sc->cdce_ifmedia, IFM_ETHER | IFM_10_T);
 317
 318         ether_ifattach(ifp, eaddr);
 319         usb_register_netisr();
 320
 321         CDCE_UNLOCK(sc);
 322
 323         usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->cdce_udev,
 324             USBDEV(sc->cdce_dev));
 325
 326         USB_ATTACH_SUCCESS_RETURN;
 327 }
 328
 329 USB_DETACH(cdce)
 330 {
 331         USB_DETACH_START(cdce, sc);
 332         struct ifnet    *ifp;
 333
 334         CDCE_LOCK(sc);
 335         sc->cdce_dying = 1;
 336         ifp = GET_IFP(sc);
 337         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 338                 cdce_shutdown(sc->cdce_dev);
 339
 340         ether_ifdetach(ifp);
 341         if_free(ifp);
 342         ifmedia_removeall(&sc->cdce_ifmedia);
 343         CDCE_UNLOCK(sc);
 344         mtx_destroy(&sc->cdce_mtx);
 345
 346         usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->cdce_udev,
 347                 USBDEV(sc->cdce_dev));
 348
 349         return (0);
 350 }
 351
 352 static void
 353 cdce_start(struct ifnet *ifp)
 354 {
 355         struct cdce_softc       *sc;
 356         struct mbuf             *m_head = NULL;
 357
 358         sc = ifp->if_softc;
 359         CDCE_LOCK(sc);
 360
 361
 362         if (sc->cdce_dying ||
 363                 ifp->if_drv_flags & IFF_DRV_OACTIVE ||
 364                 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 365                 CDCE_UNLOCK(sc);
 366                 return;
 367         }
 368
 369         IF_DEQUEUE(&ifp->if_snd, m_head);
 370         if (m_head == NULL) {
 371                 CDCE_UNLOCK(sc);
 372                 return;
 373         }
 374
 375         if (cdce_encap(sc, m_head, 0)) {
 376                 IF_PREPEND(&ifp->if_snd, m_head);
 377                 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 378                 CDCE_UNLOCK(sc);
 379                 return;
 380         }
 381
 382         BPF_MTAP(ifp, m_head);
 383
 384         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 385
 386         CDCE_UNLOCK(sc);
 387
 388         return;
 389 }
 390
 391 static int
 392 cdce_encap(struct cdce_softc *sc, struct mbuf *m, int idx)
 393 {
 394         struct ue_chain *c;
 395         usbd_status              err;
 396         int                      extra = 0;
 397
 398         c = &sc->cdce_cdata.ue_tx_chain[idx];
 399
 400         m_copydata(m, 0, m->m_pkthdr.len, c->ue_buf);
 401         if (sc->cdce_flags & CDCE_ZAURUS) {
 402                 /* Zaurus wants a 32-bit CRC appended to every frame */
 403                 u_int32_t crc;
 404
 405                 crc = htole32(crc32(c->ue_buf, m->m_pkthdr.len));
 406                 bcopy(&crc, c->ue_buf + m->m_pkthdr.len, 4);
 407                 extra = 4;
 408         }
 409         c->ue_mbuf = m;
 410
 411         usbd_setup_xfer(c->ue_xfer, sc->cdce_bulkout_pipe, c, c->ue_buf,
 412             m->m_pkthdr.len + extra, 0, 10000, cdce_txeof);
 413         err = usbd_transfer(c->ue_xfer);
 414         if (err != USBD_IN_PROGRESS) {
 415                 cdce_stop(sc);
 416                 return (EIO);
 417         }
 418
 419         sc->cdce_cdata.ue_tx_cnt++;
 420
 421         return (0);
 422 }
 423
 424 static void
 425 cdce_stop(struct cdce_softc *sc)
 426 {
 427         usbd_status      err;
 428         struct ifnet    *ifp;
 429
 430         CDCE_LOCK(sc);
 431
 432         cdce_reset(sc);
 433
 434         ifp = GET_IFP(sc);
 435         ifp->if_timer = 0;
 436
 437         if (sc->cdce_bulkin_pipe != NULL) {
 438                 err = usbd_abort_pipe(sc->cdce_bulkin_pipe);
 439                 if (err)
 440                         printf("%s: abort rx pipe failed: %s\n",
 441                             device_get_nameunit(sc->cdce_dev), usbd_errstr(err));
 442                 err = usbd_close_pipe(sc->cdce_bulkin_pipe);
 443                 if (err)
 444                         printf("%s: close rx pipe failed: %s\n",
 445                             device_get_nameunit(sc->cdce_dev), usbd_errstr(err));
 446                 sc->cdce_bulkin_pipe = NULL;
 447         }
 448
 449         if (sc->cdce_bulkout_pipe != NULL) {
 450                 err = usbd_abort_pipe(sc->cdce_bulkout_pipe);
 451                 if (err)
 452                         printf("%s: abort tx pipe failed: %s\n",
 453                             device_get_nameunit(sc->cdce_dev), usbd_errstr(err));
 454                 err = usbd_close_pipe(sc->cdce_bulkout_pipe);
 455                 if (err)
 456                         printf("%s: close tx pipe failed: %s\n",
 457                             device_get_nameunit(sc->cdce_dev), usbd_errstr(err));
 458                 sc->cdce_bulkout_pipe = NULL;
 459         }
 460
 461         usb_ether_rx_list_free(&sc->cdce_cdata);
 462         usb_ether_tx_list_free(&sc->cdce_cdata);
 463
 464         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 465         CDCE_UNLOCK(sc);
 466
 467         return;
 468 }
 469
 470 static int
 471 cdce_shutdown(device_t dev)
 472 {
 473         struct cdce_softc *sc;
 474
 475         sc = device_get_softc(dev);
 476         cdce_stop(sc);
 477
 478         return (0);
 479 }
 480
 481 static int
 482 cdce_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 483 {
 484         struct cdce_softc       *sc = ifp->if_softc;
 485         struct ifreq            *ifr = (struct ifreq *)data;
 486         int                      error = 0;
 487
 488         if (sc->cdce_dying)
 489                 return (ENXIO);
 490
 491         switch(command) {
 492         case SIOCSIFFLAGS:
 493                 if (ifp->if_flags & IFF_UP) {
 494                         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 495                                 cdce_init(sc);
 496                 } else {
 497                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 498                                 cdce_stop(sc);
 499                 }
 500                 error = 0;
 501                 break;
 502
 503         case SIOCSIFMEDIA:
 504         case SIOCGIFMEDIA:
 505                 error = ifmedia_ioctl(ifp, ifr, &sc->cdce_ifmedia, command);
 506                 break;
 507
 508         default:
 509                 error = ether_ioctl(ifp, command, data);
 510                 break;
 511         }
 512
 513         return (error);
 514 }
 515
 516 static void
 517 cdce_reset(struct cdce_softc *sc)
 518 {
 519         /* XXX Maybe reset the bulk pipes here? */
 520         return;
 521 }
 522
 523 static void
 524 cdce_init(void *xsc)
 525 {
 526         struct cdce_softc       *sc = xsc;
 527         struct ifnet            *ifp = GET_IFP(sc);
 528         struct ue_chain *c;
 529         usbd_status              err;
 530         int                      i;
 531
 532         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 533                 return;
 534
 535         CDCE_LOCK(sc);
 536         cdce_reset(sc);
 537
 538         if (usb_ether_tx_list_init(sc, &sc->cdce_cdata,
 539             sc->cdce_udev) == ENOBUFS) {
 540                 printf("%s: tx list init failed\n", device_get_nameunit(sc->cdce_dev));
 541                 CDCE_UNLOCK(sc);
 542                 return;
 543         }
 544
 545         if (usb_ether_rx_list_init(sc, &sc->cdce_cdata,
 546             sc->cdce_udev) == ENOBUFS) {
 547                 printf("%s: rx list init failed\n", device_get_nameunit(sc->cdce_dev));
 548                 CDCE_UNLOCK(sc);
 549                 return;
 550         }
 551
 552         /* Maybe set multicast / broadcast here??? */
 553
 554         err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkin_no,
 555             USBD_EXCLUSIVE_USE, &sc->cdce_bulkin_pipe);
 556         if (err) {
 557                 printf("%s: open rx pipe failed: %s\n", device_get_nameunit(sc->cdce_dev),
 558                     usbd_errstr(err));
 559                 CDCE_UNLOCK(sc);
 560                 return;
 561         }
 562
 563         err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkout_no,
 564             USBD_EXCLUSIVE_USE, &sc->cdce_bulkout_pipe);
 565         if (err) {
 566                 printf("%s: open tx pipe failed: %s\n", device_get_nameunit(sc->cdce_dev),
 567                     usbd_errstr(err));
 568                 CDCE_UNLOCK(sc);
 569                 return;
 570         }
 571
 572         for (i = 0; i < UE_RX_LIST_CNT; i++) {
 573                 c = &sc->cdce_cdata.ue_rx_chain[i];
 574                 usbd_setup_xfer(c->ue_xfer, sc->cdce_bulkin_pipe, c,
 575                     mtod(c->ue_mbuf, char *), UE_BUFSZ, USBD_SHORT_XFER_OK,
 576                     USBD_NO_TIMEOUT, cdce_rxeof);
 577                 usbd_transfer(c->ue_xfer);
 578         }
 579
 580         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 581         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 582
 583         CDCE_UNLOCK(sc);
 584
 585         return;
 586 }
 587
 588 static void
 589 cdce_rxeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
 590 {
 591         struct ue_chain *c = priv;
 592         struct cdce_softc       *sc = c->ue_sc;
 593         struct ifnet            *ifp;
 594         struct mbuf             *m;
 595         int                      total_len = 0;
 596
 597         CDCE_LOCK(sc);
 598         ifp = GET_IFP(sc);
 599
 600         if (sc->cdce_dying || !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 601                 CDCE_UNLOCK(sc);
 602                 return;
 603         }
 604
 605         if (status != USBD_NORMAL_COMPLETION) {
 606                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
 607                         CDCE_UNLOCK(sc);
 608                         return;
 609                 }
 610                 if (sc->cdce_rxeof_errors == 0)
 611                         printf("%s: usb error on rx: %s\n",
 612                             device_get_nameunit(sc->cdce_dev), usbd_errstr(status));
 613                 if (status == USBD_STALLED)
 614                         usbd_clear_endpoint_stall_async(sc->cdce_bulkin_pipe);
 615                 DELAY(sc->cdce_rxeof_errors * 10000);
 616                 sc->cdce_rxeof_errors++;
 617                 goto done;
 618         }
 619
 620         sc->cdce_rxeof_errors = 0;
 621
 622         usbd_get_xfer_status(xfer, NULL, NULL, &total_len, NULL);
 623
 624         if (sc->cdce_flags & CDCE_ZAURUS)
 625                 total_len -= 4; /* Strip off CRC added by Zaurus */
 626
 627         m = c->ue_mbuf;
 628
 629         if (total_len < sizeof(struct ether_header)) {
 630                 ifp->if_ierrors++;
 631                 goto done;
 632         }
 633
 634         ifp->if_ipackets++;
 635         m->m_pkthdr.rcvif = (struct ifnet *)&sc->q;
 636         m->m_pkthdr.len = m->m_len = total_len;
 637
 638         /* Put the packet on the special USB input queue. */
 639         usb_ether_input(m);
 640         CDCE_UNLOCK(sc);
 641
 642         return;
 643
 644 done:
 645         /* Setup new transfer. */
 646         usbd_setup_xfer(c->ue_xfer, sc->cdce_bulkin_pipe, c,
 647             mtod(c->ue_mbuf, char *),
 648             UE_BUFSZ, USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT,
 649             cdce_rxeof);
 650         usbd_transfer(c->ue_xfer);
 651         CDCE_UNLOCK(sc);
 652
 653         return;
 654 }
 655
 656 static void
 657 cdce_txeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
 658 {
 659         struct ue_chain *c = priv;
 660         struct cdce_softc       *sc = c->ue_sc;
 661         struct ifnet            *ifp;
 662         usbd_status              err;
 663
 664         CDCE_LOCK(sc);
 665         ifp = GET_IFP(sc);
 666
 667         if (sc->cdce_dying ||
 668                 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 669                 CDCE_UNLOCK(sc);
 670                 return;
 671         }
 672
 673         if (status != USBD_NORMAL_COMPLETION) {
 674                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
 675                         CDCE_UNLOCK(sc);
 676                         return;
 677                 }
 678                 ifp->if_oerrors++;
 679                 printf("%s: usb error on tx: %s\n", device_get_nameunit(sc->cdce_dev),
 680                     usbd_errstr(status));
 681                 if (status == USBD_STALLED)
 682                         usbd_clear_endpoint_stall_async(sc->cdce_bulkout_pipe);
 683                 CDCE_UNLOCK(sc);
 684                 return;
 685         }
 686
 687         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 688         usbd_get_xfer_status(c->ue_xfer, NULL, NULL, NULL, &err);
 689
 690         if (c->ue_mbuf != NULL) {
 691                 c->ue_mbuf->m_pkthdr.rcvif = ifp;
 692                 usb_tx_done(c->ue_mbuf);
 693                 c->ue_mbuf = NULL;
 694         }
 695
 696         if (err)
 697                 ifp->if_oerrors++;
 698         else
 699                 ifp->if_opackets++;
 700
 701         CDCE_UNLOCK(sc);
 702
 703         return;
 704 }
 705
 706 static void
 707 cdce_rxstart(struct ifnet *ifp)
 708 {
 709         struct cdce_softc   *sc;
 710         struct ue_chain   *c;
 711
 712         sc = ifp->if_softc;
 713         CDCE_LOCK(sc);
 714
 715         if (sc->cdce_dying || !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 716                 CDCE_UNLOCK(sc);
 717                 return;
 718         }
 719
 720         c = &sc->cdce_cdata.ue_rx_chain[sc->cdce_cdata.ue_rx_prod];
 721
 722         c->ue_mbuf = usb_ether_newbuf();
 723         if (c->ue_mbuf == NULL) {
 724                 printf("%s: no memory for rx list "
 725                     "-- packet dropped!\n", device_get_nameunit(sc->cdce_dev));
 726                 ifp->if_ierrors++;
 727                 CDCE_UNLOCK(sc);
 728                 return;
 729         }
 730
 731         usbd_setup_xfer(c->ue_xfer, sc->cdce_bulkin_pipe, c,
 732             mtod(c->ue_mbuf, char *), UE_BUFSZ, USBD_SHORT_XFER_OK,
 733             USBD_NO_TIMEOUT, cdce_rxeof);
 734         usbd_transfer(c->ue_xfer);
 735
 736         CDCE_UNLOCK(sc);
 737         return;
 738 }
 739
 740 static int
 741 cdce_ifmedia_upd(struct ifnet *ifp)
 742 {
 743
 744         /* no-op, cdce has only 1 possible media type */
 745         return 0;
 746 }
 747
 748 static void
 749 cdce_ifmedia_sts(struct ifnet * const ifp, struct ifmediareq *req)
 750 {
 751
 752         req->ifm_status = IFM_AVALID | IFM_ACTIVE;
 753         req->ifm_active = IFM_ETHER | IFM_10_T;
 754 }