sys/bus/usb/uhub.c

   1 /*
   2  * $NetBSD: uhub.c,v 1.64 2003/02/08 03:32:51 ichiro Exp $
   3  * $FreeBSD: src/sys/dev/usb/uhub.c,v 1.54 2003/08/24 17:55:55 obrien Exp $
   4  * $DragonFly: src/sys/bus/usb/uhub.c,v 1.6 2004/03/12 03:43:06 dillon Exp $
   5  */
   6
   7 /*
   8  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   9  * All rights reserved.
  10  *
  11  * This code is derived from software contributed to The NetBSD Foundation
  12  * by Lennart Augustsson (lennart@augustsson.net) at
  13  * Carlstedt Research & Technology.
  14  *
  15  * Redistribution and use in source and binary forms, with or without
  16  * modification, are permitted provided that the following conditions
  17  * are met:
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in the
  22  *    documentation and/or other materials provided with the distribution.
  23  * 3. All advertising materials mentioning features or use of this software
  24  *    must display the following acknowledgement:
  25  *        This product includes software developed by the NetBSD
  26  *        Foundation, Inc. and its contributors.
  27  * 4. Neither the name of The NetBSD Foundation nor the names of its
  28  *    contributors may be used to endorse or promote products derived
  29  *    from this software without specific prior written permission.
  30  *
  31  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  32  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  33  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  34  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  35  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  36  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  37  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  38  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  39  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  40  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGE.
  42  */
  43
  44 /*
  45  * USB spec: http://www.usb.org/developers/docs/usbspec.zip
  46  */
  47
  48 #include <sys/param.h>
  49 #include <sys/systm.h>
  50 #include <sys/kernel.h>
  51 #include <sys/malloc.h>
  52 #if defined(__NetBSD__) || defined(__OpenBSD__)
  53 #include <sys/device.h>
  54 #include <sys/proc.h>
  55 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  56 #include <sys/module.h>
  57 #include <sys/bus.h>
  58 #include "bus_if.h"
  59 #endif
  60 #include <sys/sysctl.h>
  61
  62 #include <machine/bus.h>
  63
  64 #include "usb.h"
  65 #include "usbdi.h"
  66 #include "usbdi_util.h"
  67 #include "usbdivar.h"
  68
  69 #define UHUB_INTR_INTERVAL 255  /* ms */
  70
  71 #ifdef USB_DEBUG
  72 #define DPRINTF(x)      if (uhubdebug) logprintf x
  73 #define DPRINTFN(n,x)   if (uhubdebug>(n)) logprintf x
  74 int     uhubdebug = 0;
  75 SYSCTL_NODE(_hw_usb, OID_AUTO, uhub, CTLFLAG_RW, 0, "USB uhub");
  76 SYSCTL_INT(_hw_usb_uhub, OID_AUTO, debug, CTLFLAG_RW,
  77            &uhubdebug, 0, "uhub debug level");
  78 #else
  79 #define DPRINTF(x)
  80 #define DPRINTFN(n,x)
  81 #endif
  82
  83 struct uhub_softc {
  84         USBBASEDEVICE           sc_dev;         /* base device */
  85         usbd_device_handle      sc_hub;         /* USB device */
  86         usbd_pipe_handle        sc_ipipe;       /* interrupt pipe */
  87         u_int8_t                sc_status[1];   /* XXX more ports */
  88         u_char                  sc_running;
  89 };
  90
  91 Static usbd_status uhub_explore(usbd_device_handle hub);
  92 Static void uhub_intr(usbd_xfer_handle, usbd_private_handle,usbd_status);
  93
  94 #if defined(__FreeBSD__) || defined(__DragonFly__)
  95 Static bus_driver_added_t uhub_driver_added;
  96 Static bus_child_detached_t uhub_child_detached;
  97 #endif
  98
  99
 100 /*
 101  * We need two attachment points:
 102  * hub to usb and hub to hub
 103  * Every other driver only connects to hubs
 104  */
 105
 106 #if defined(__NetBSD__) || defined(__OpenBSD__)
 107 USB_DECLARE_DRIVER(uhub);
 108
 109 /* Create the driver instance for the hub connected to hub case */
 110 CFATTACH_DECL(uhub_uhub, sizeof(struct uhub_softc),
 111     uhub_match, uhub_attach, uhub_detach, uhub_activate);
 112 #elif defined(__FreeBSD__) || defined(__DragonFly__)
 113 USB_DECLARE_DRIVER_INIT(uhub,
 114                         DEVMETHOD(bus_driver_added, uhub_driver_added),
 115                         DEVMETHOD(bus_child_detached, uhub_child_detached),
 116                         DEVMETHOD(device_suspend, bus_generic_suspend),
 117                         DEVMETHOD(device_resume, bus_generic_resume),
 118                         DEVMETHOD(device_shutdown, bus_generic_shutdown)
 119                         );
 120
 121 /* Create the driver instance for the hub connected to usb case. */
 122 devclass_t uhubroot_devclass;
 123
 124 Static device_method_t uhubroot_methods[] = {
 125         DEVMETHOD(device_probe, uhub_match),
 126         DEVMETHOD(device_attach, uhub_attach),
 127
 128         /* detach is not allowed for a root hub */
 129         DEVMETHOD(device_suspend, bus_generic_suspend),
 130         DEVMETHOD(device_resume, bus_generic_resume),
 131         DEVMETHOD(device_shutdown, bus_generic_shutdown),
 132         {0,0}
 133 };
 134
 135 Static  driver_t uhubroot_driver = {
 136         "uhub",
 137         uhubroot_methods,
 138         sizeof(struct uhub_softc)
 139 };
 140 #endif
 141
 142 USB_MATCH(uhub)
 143 {
 144         USB_MATCH_START(uhub, uaa);
 145         usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device);
 146
 147         DPRINTFN(5,("uhub_match, dd=%p\n", dd));
 148         /*
 149          * The subclass for hubs seems to be 0 for some and 1 for others,
 150          * so we just ignore the subclass.
 151          */
 152         if (uaa->iface == NULL && dd->bDeviceClass == UDCLASS_HUB)
 153                 return (UMATCH_DEVCLASS_DEVSUBCLASS);
 154         return (UMATCH_NONE);
 155 }
 156
 157 USB_ATTACH(uhub)
 158 {
 159         USB_ATTACH_START(uhub, sc, uaa);
 160         usbd_device_handle dev = uaa->device;
 161         char *devinfo;
 162         usbd_status err;
 163         struct usbd_hub *hub;
 164         usb_device_request_t req;
 165         usb_hub_descriptor_t hubdesc;
 166         int p, port, nports, nremov, pwrdly;
 167         usbd_interface_handle iface;
 168         usb_endpoint_descriptor_t *ed;
 169
 170         devinfo = malloc(1024, M_TEMP, M_WAITOK);
 171         DPRINTFN(1,("uhub_attach\n"));
 172         sc->sc_hub = dev;
 173         usbd_devinfo(dev, 1, devinfo);
 174         USB_ATTACH_SETUP;
 175         printf("%s: %s\n", USBDEVNAME(sc->sc_dev), devinfo);
 176
 177         err = usbd_set_config_index(dev, 0, 1);
 178         if (err) {
 179                 DPRINTF(("%s: configuration failed, error=%s\n",
 180                          USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
 181                 free(devinfo, M_TEMP);
 182                 USB_ATTACH_ERROR_RETURN;
 183         }
 184
 185         if (dev->depth > USB_HUB_MAX_DEPTH) {
 186                 printf("%s: hub depth (%d) exceeded, hub ignored\n",
 187                        USBDEVNAME(sc->sc_dev), USB_HUB_MAX_DEPTH);
 188                 free(devinfo, M_TEMP);
 189                 USB_ATTACH_ERROR_RETURN;
 190         }
 191
 192         /* Get hub descriptor. */
 193         req.bmRequestType = UT_READ_CLASS_DEVICE;
 194         req.bRequest = UR_GET_DESCRIPTOR;
 195         USETW2(req.wValue, (dev->address > 1 ? UDESC_HUB : 0), 0);
 196         USETW(req.wIndex, 0);
 197         USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE);
 198         DPRINTFN(1,("usb_init_hub: getting hub descriptor\n"));
 199         err = usbd_do_request(dev, &req, &hubdesc);
 200         nports = hubdesc.bNbrPorts;
 201         if (!err && nports > 7) {
 202                 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8);
 203                 err = usbd_do_request(dev, &req, &hubdesc);
 204         }
 205         if (err) {
 206                 DPRINTF(("%s: getting hub descriptor failed, error=%s\n",
 207                          USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
 208                 free(devinfo, M_TEMP);
 209                 USB_ATTACH_ERROR_RETURN;
 210         }
 211
 212         for (nremov = 0, port = 1; port <= nports; port++)
 213                 if (!UHD_NOT_REMOV(&hubdesc, port))
 214                         nremov++;
 215         printf("%s: %d port%s with %d removable, %s powered\n",
 216                USBDEVNAME(sc->sc_dev), nports, nports != 1 ? "s" : "",
 217                nremov, dev->self_powered ? "self" : "bus");
 218
 219         hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port),
 220                      M_USBDEV, M_WAITOK);
 221         dev->hub = hub;
 222         dev->hub->hubsoftc = sc;
 223         hub->explore = uhub_explore;
 224         hub->hubdesc = hubdesc;
 225
 226         DPRINTFN(1,("usbhub_init_hub: selfpowered=%d, parent=%p, "
 227                     "parent->selfpowered=%d\n",
 228                  dev->self_powered, dev->powersrc->parent,
 229                  dev->powersrc->parent ?
 230                  dev->powersrc->parent->self_powered : 0));
 231
 232         if (!dev->self_powered && dev->powersrc->parent != NULL &&
 233             !dev->powersrc->parent->self_powered) {
 234                 printf("%s: bus powered hub connected to bus powered hub, "
 235                        "ignored\n", USBDEVNAME(sc->sc_dev));
 236                 goto bad;
 237         }
 238
 239         /* Set up interrupt pipe. */
 240         err = usbd_device2interface_handle(dev, 0, &iface);
 241         if (err) {
 242                 printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev));
 243                 goto bad;
 244         }
 245         ed = usbd_interface2endpoint_descriptor(iface, 0);
 246         if (ed == NULL) {
 247                 printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev));
 248                 goto bad;
 249         }
 250         if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 251                 printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev));
 252                 goto bad;
 253         }
 254
 255         err = usbd_open_pipe_intr(iface, ed->bEndpointAddress,
 256                   USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_status,
 257                   sizeof(sc->sc_status), uhub_intr, UHUB_INTR_INTERVAL);
 258         if (err) {
 259                 printf("%s: cannot open interrupt pipe\n",
 260                        USBDEVNAME(sc->sc_dev));
 261                 goto bad;
 262         }
 263
 264         /* Wait with power off for a while. */
 265         usbd_delay_ms(dev, USB_POWER_DOWN_TIME);
 266
 267         usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, dev, USBDEV(sc->sc_dev));
 268
 269         /*
 270          * To have the best chance of success we do things in the exact same
 271          * order as Windoze98.  This should not be necessary, but some
 272          * devices do not follow the USB specs to the letter.
 273          *
 274          * These are the events on the bus when a hub is attached:
 275          *  Get device and config descriptors (see attach code)
 276          *  Get hub descriptor (see above)
 277          *  For all ports
 278          *     turn on power
 279          *     wait for power to become stable
 280          * (all below happens in explore code)
 281          *  For all ports
 282          *     clear C_PORT_CONNECTION
 283          *  For all ports
 284          *     get port status
 285          *     if device connected
 286          *        wait 100 ms
 287          *        turn on reset
 288          *        wait
 289          *        clear C_PORT_RESET
 290          *        get port status
 291          *        proceed with device attachment
 292          */
 293
 294         /* Set up data structures */
 295         for (p = 0; p < nports; p++) {
 296                 struct usbd_port *up = &hub->ports[p];
 297                 up->device = 0;
 298                 up->parent = dev;
 299                 up->portno = p+1;
 300                 if (dev->self_powered)
 301                         /* Self powered hub, give ports maximum current. */
 302                         up->power = USB_MAX_POWER;
 303                 else
 304                         up->power = USB_MIN_POWER;
 305         }
 306
 307         /* XXX should check for none, individual, or ganged power? */
 308
 309         pwrdly = dev->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR
 310             + USB_EXTRA_POWER_UP_TIME;
 311         for (port = 1; port <= nports; port++) {
 312                 /* Turn the power on. */
 313                 err = usbd_set_port_feature(dev, port, UHF_PORT_POWER);
 314                 if (err)
 315                         printf("%s: port %d power on failed, %s\n",
 316                                USBDEVNAME(sc->sc_dev), port,
 317                                usbd_errstr(err));
 318                 DPRINTF(("usb_init_port: turn on port %d power\n", port));
 319                 /* Wait for stable power. */
 320                 usbd_delay_ms(dev, pwrdly);
 321         }
 322
 323         /* The usual exploration will finish the setup. */
 324
 325         sc->sc_running = 1;
 326
 327         USB_ATTACH_SUCCESS_RETURN;
 328
 329  bad:
 330         free(hub, M_USBDEV);
 331         free(devinfo, M_TEMP);
 332         dev->hub = 0;
 333         USB_ATTACH_ERROR_RETURN;
 334 }
 335
 336 usbd_status
 337 uhub_explore(usbd_device_handle dev)
 338 {
 339         usb_hub_descriptor_t *hd = &dev->hub->hubdesc;
 340         struct uhub_softc *sc = dev->hub->hubsoftc;
 341         struct usbd_port *up;
 342         usbd_status err;
 343         int speed;
 344         int port;
 345         int change, status;
 346
 347         DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address));
 348
 349         if (!sc->sc_running)
 350                 return (USBD_NOT_STARTED);
 351
 352         /* Ignore hubs that are too deep. */
 353         if (dev->depth > USB_HUB_MAX_DEPTH)
 354                 return (USBD_TOO_DEEP);
 355
 356         for(port = 1; port <= hd->bNbrPorts; port++) {
 357                 up = &dev->hub->ports[port-1];
 358                 err = usbd_get_port_status(dev, port, &up->status);
 359                 if (err) {
 360                         DPRINTF(("uhub_explore: get port status failed, "
 361                                  "error=%s\n", usbd_errstr(err)));
 362                         continue;
 363                 }
 364                 status = UGETW(up->status.wPortStatus);
 365                 change = UGETW(up->status.wPortChange);
 366                 DPRINTFN(3,("uhub_explore: %s port %d status 0x%04x 0x%04x\n",
 367                             USBDEVNAME(sc->sc_dev), port, status, change));
 368                 if (change & UPS_C_PORT_ENABLED) {
 369                         DPRINTF(("uhub_explore: C_PORT_ENABLED\n"));
 370                         usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);
 371                         if (status & UPS_PORT_ENABLED) {
 372                                 printf("%s: illegal enable change, port %d\n",
 373                                        USBDEVNAME(sc->sc_dev), port);
 374                         } else {
 375                                 /* Port error condition. */
 376                                 if (up->restartcnt) /* no message first time */
 377                                         printf("%s: port error, restarting "
 378                                                "port %d\n",
 379                                                USBDEVNAME(sc->sc_dev), port);
 380
 381                                 if (up->restartcnt++ < USBD_RESTART_MAX)
 382                                         goto disco;
 383                                 else
 384                                         printf("%s: port error, giving up "
 385                                                "port %d\n",
 386                                                USBDEVNAME(sc->sc_dev), port);
 387                         }
 388                 }
 389                 if (!(change & UPS_C_CONNECT_STATUS)) {
 390                         DPRINTFN(3,("uhub_explore: port=%d !C_CONNECT_"
 391                                     "STATUS\n", port));
 392                         /* No status change, just do recursive explore. */
 393                         if (up->device != NULL && up->device->hub != NULL)
 394                                 up->device->hub->explore(up->device);
 395 #if 0 && defined(DIAGNOSTIC)
 396                         if (up->device == NULL &&
 397                             (status & UPS_CURRENT_CONNECT_STATUS))
 398                                 printf("%s: connected, no device\n",
 399                                        USBDEVNAME(sc->sc_dev));
 400 #endif
 401                         continue;
 402                 }
 403
 404                 /* We have a connect status change, handle it. */
 405
 406                 DPRINTF(("uhub_explore: status change hub=%d port=%d\n",
 407                          dev->address, port));
 408                 usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION);
 409                 /*usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);*/
 410                 /*
 411                  * If there is already a device on the port the change status
 412                  * must mean that is has disconnected.  Looking at the
 413                  * current connect status is not enough to figure this out
 414                  * since a new unit may have been connected before we handle
 415                  * the disconnect.
 416                  */
 417         disco:
 418                 if (up->device != NULL) {
 419                         /* Disconnected */
 420                         DPRINTF(("uhub_explore: device addr=%d disappeared "
 421                                  "on port %d\n", up->device->address, port));
 422                         usb_disconnect_port(up, USBDEV(sc->sc_dev));
 423                         usbd_clear_port_feature(dev, port,
 424                                                 UHF_C_PORT_CONNECTION);
 425                 }
 426                 if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
 427                         /* Nothing connected, just ignore it. */
 428                         DPRINTFN(3,("uhub_explore: port=%d !CURRENT_CONNECT"
 429                                     "_STATUS\n", port));
 430                         continue;
 431                 }
 432
 433                 /* Connected */
 434
 435                 if (!(status & UPS_PORT_POWER))
 436                         printf("%s: strange, connected port %d has no power\n",
 437                                USBDEVNAME(sc->sc_dev), port);
 438
 439                 /* Wait for maximum device power up time. */
 440                 usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY);
 441
 442                 /* Reset port, which implies enabling it. */
 443                 if (usbd_reset_port(dev, port, &up->status)) {
 444                         printf("%s: port %d reset failed\n",
 445                                USBDEVNAME(sc->sc_dev), port);
 446                         continue;
 447                 }
 448                 /* Get port status again, it might have changed during reset */
 449                 err = usbd_get_port_status(dev, port, &up->status);
 450                 if (err) {
 451                         DPRINTF(("uhub_explore: get port status failed, "
 452                                  "error=%s\n", usbd_errstr(err)));
 453                         continue;
 454                 }
 455                 status = UGETW(up->status.wPortStatus);
 456                 change = UGETW(up->status.wPortChange);
 457                 if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
 458                         /* Nothing connected, just ignore it. */
 459 #ifdef DIAGNOSTIC
 460                         printf("%s: port %d, device disappeared after reset\n",
 461                                USBDEVNAME(sc->sc_dev), port);
 462 #endif
 463                         continue;
 464                 }
 465
 466                 /* Figure out device speed */
 467                 if (status & UPS_HIGH_SPEED)
 468                         speed = USB_SPEED_HIGH;
 469                 else if (status & UPS_LOW_SPEED)
 470                         speed = USB_SPEED_LOW;
 471                 else
 472                         speed = USB_SPEED_FULL;
 473                 /* Get device info and set its address. */
 474                 err = usbd_new_device(USBDEV(sc->sc_dev), dev->bus,
 475                     dev->depth + 1, speed, port, up);
 476                 /* XXX retry a few times? */
 477                 if (err) {
 478                         DPRINTFN(-1,("uhub_explore: usb_new_device failed, "
 479                                      "error=%s\n", usbd_errstr(err)));
 480                         /* Avoid addressing problems by disabling. */
 481                         /* usbd_reset_port(dev, port, &up->status); */
 482
 483                         /*
 484                          * The unit refused to accept a new address, or had
 485                          * some other serious problem.  Since we cannot leave
 486                          * at 0 we have to disable the port instead.
 487                          */
 488                         printf("%s: device problem, disabling port %d\n",
 489                                USBDEVNAME(sc->sc_dev), port);
 490                         usbd_clear_port_feature(dev, port, UHF_PORT_ENABLE);
 491                 } else {
 492                         /* The port set up succeeded, reset error count. */
 493                         up->restartcnt = 0;
 494
 495                         if (up->device->hub)
 496                                 up->device->hub->explore(up->device);
 497                 }
 498         }
 499         return (USBD_NORMAL_COMPLETION);
 500 }
 501
 502 #if defined(__NetBSD__) || defined(__OpenBSD__)
 503 int
 504 uhub_activate(device_ptr_t self, enum devact act)
 505 {
 506         struct uhub_softc *sc = (struct uhub_softc *)self;
 507         struct usbd_hub *hub = sc->sc_hub->hub;
 508         usbd_device_handle dev;
 509         int nports, port, i;
 510
 511         switch (act) {
 512         case DVACT_ACTIVATE:
 513                 return (EOPNOTSUPP);
 514
 515         case DVACT_DEACTIVATE:
 516                 if (hub == NULL) /* malfunctioning hub */
 517                         break;
 518                 nports = hub->hubdesc.bNbrPorts;
 519                 for(port = 0; port < nports; port++) {
 520                         dev = hub->ports[port].device;
 521                         if (dev != NULL && dev->subdevs != NULL) {
 522                                 for (i = 0; dev->subdevs[i] != NULL; i++)
 523                                         config_deactivate(dev->subdevs[i]);
 524                         }
 525                 }
 526                 break;
 527         }
 528         return (0);
 529 }
 530 #endif
 531
 532 /*
 533  * Called from process context when the hub is gone.
 534  * Detach all devices on active ports.
 535  */
 536 USB_DETACH(uhub)
 537 {
 538         USB_DETACH_START(uhub, sc);
 539         struct usbd_hub *hub = sc->sc_hub->hub;
 540         struct usbd_port *rup;
 541         int port, nports;
 542
 543 #if defined(__NetBSD__) || defined(__OpenBSD__)
 544         DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags));
 545 #elif defined(__FreeBSD__) || defined(__DragonFly__)
 546         DPRINTF(("uhub_detach: sc=%port\n", sc));
 547 #endif
 548
 549         if (hub == NULL)                /* Must be partially working */
 550                 return (0);
 551
 552         usbd_abort_pipe(sc->sc_ipipe);
 553         usbd_close_pipe(sc->sc_ipipe);
 554
 555         nports = hub->hubdesc.bNbrPorts;
 556         for(port = 0; port < nports; port++) {
 557                 rup = &hub->ports[port];
 558                 if (rup->device)
 559                         usb_disconnect_port(rup, self);
 560         }
 561
 562         usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub,
 563                            USBDEV(sc->sc_dev));
 564
 565         free(hub, M_USBDEV);
 566         sc->sc_hub->hub = NULL;
 567
 568         return (0);
 569 }
 570
 571 #if defined(__FreeBSD__) || defined(__DragonFly__)
 572 /* Called when a device has been detached from it */
 573 Static void
 574 uhub_child_detached(device_t self, device_t child)
 575 {
 576        struct uhub_softc *sc = device_get_softc(self);
 577        usbd_device_handle devhub = sc->sc_hub;
 578        usbd_device_handle dev;
 579        int nports;
 580        int port;
 581        int i;
 582
 583        if (!devhub->hub)
 584                /* should never happen; children are only created after init */
 585                panic("hub not fully initialised, but child deleted?");
 586
 587        nports = devhub->hub->hubdesc.bNbrPorts;
 588        for (port = 0; port < nports; port++) {
 589                dev = devhub->hub->ports[port].device;
 590                if (dev && dev->subdevs) {
 591                        for (i = 0; dev->subdevs[i]; i++) {
 592                                if (dev->subdevs[i] == child) {
 593                                        dev->subdevs[i] = NULL;
 594                                        return;
 595                                }
 596                        }
 597                }
 598        }
 599 }
 600
 601 Static void
 602 uhub_driver_added(device_t _dev, driver_t *_driver)
 603 {
 604         /* Don't do anything, as reprobing does not work currently. We should
 605          * really call through to usbd_new_device or a function along those
 606          * lines that reinitialises the device if it is not owned by any
 607          * driver. But this is complicated. Manual replugging by the user is
 608          * easier.
 609          */
 610
 611          ;
 612 }
 613 #endif
 614
 615
 616 /*
 617  * Hub interrupt.
 618  * This an indication that some port has changed status.
 619  * Notify the bus event handler thread that we need
 620  * to be explored again.
 621  */
 622 void
 623 uhub_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 624 {
 625         struct uhub_softc *sc = addr;
 626
 627         DPRINTFN(5,("uhub_intr: sc=%p\n", sc));
 628         if (status == USBD_STALLED)
 629                 usbd_clear_endpoint_stall_async(sc->sc_ipipe);
 630         else if (status == USBD_NORMAL_COMPLETION)
 631                 usb_needs_explore(sc->sc_hub);
 632 }
 633
 634 #if defined(__FreeBSD__) || defined(__DragonFly__)
 635 DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0);
 636 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0);
 637 #endif