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 1.9 2006/10/25 20:55:52 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 "usb.h"
  63 #include "usbdi.h"
  64 #include "usbdi_util.h"
  65 #include "usbdivar.h"
  66
  67 #define UHUB_INTR_INTERVAL 255  /* ms */
  68
  69 #ifdef USB_DEBUG
  70 #define DPRINTF(x)      if (uhubdebug) logprintf x
  71 #define DPRINTFN(n,x)   if (uhubdebug>(n)) logprintf x
  72 int     uhubdebug = 0;
  73 SYSCTL_NODE(_hw_usb, OID_AUTO, uhub, CTLFLAG_RW, 0, "USB uhub");
  74 SYSCTL_INT(_hw_usb_uhub, OID_AUTO, debug, CTLFLAG_RW,
  75            &uhubdebug, 0, "uhub debug level");
  76 #else
  77 #define DPRINTF(x)
  78 #define DPRINTFN(n,x)
  79 #endif
  80
  81 struct uhub_softc {
  82         USBBASEDEVICE           sc_dev;         /* base device */
  83         usbd_device_handle      sc_hub;         /* USB device */
  84         usbd_pipe_handle        sc_ipipe;       /* interrupt pipe */
  85         u_int8_t                sc_status[1];   /* XXX more ports */
  86         u_char                  sc_running;
  87 };
  88
  89 Static usbd_status uhub_explore(usbd_device_handle hub);
  90 Static void uhub_intr(usbd_xfer_handle, usbd_private_handle,usbd_status);
  91
  92 #if defined(__FreeBSD__) || defined(__DragonFly__)
  93 Static bus_driver_added_t uhub_driver_added;
  94 Static bus_child_detached_t uhub_child_detached;
  95 #endif
  96
  97
  98 /*
  99  * We need two attachment points:
 100  * hub to usb and hub to hub
 101  * Every other driver only connects to hubs
 102  */
 103
 104 #if defined(__NetBSD__) || defined(__OpenBSD__)
 105 USB_DECLARE_DRIVER(uhub);
 106
 107 /* Create the driver instance for the hub connected to hub case */
 108 CFATTACH_DECL(uhub_uhub, sizeof(struct uhub_softc),
 109     uhub_match, uhub_attach, uhub_detach, uhub_activate);
 110 #elif defined(__FreeBSD__) || defined(__DragonFly__)
 111 USB_DECLARE_DRIVER_INIT(uhub,
 112                         DEVMETHOD(bus_driver_added, uhub_driver_added),
 113                         DEVMETHOD(bus_child_detached, uhub_child_detached),
 114                         DEVMETHOD(device_suspend, bus_generic_suspend),
 115                         DEVMETHOD(device_resume, bus_generic_resume),
 116                         DEVMETHOD(device_shutdown, bus_generic_shutdown)
 117                         );
 118
 119 /* Create the driver instance for the hub connected to usb case. */
 120 devclass_t uhubroot_devclass;
 121
 122 Static device_method_t uhubroot_methods[] = {
 123         DEVMETHOD(device_probe, uhub_match),
 124         DEVMETHOD(device_attach, uhub_attach),
 125
 126         /* detach is not allowed for a root hub */
 127         DEVMETHOD(device_suspend, bus_generic_suspend),
 128         DEVMETHOD(device_resume, bus_generic_resume),
 129         DEVMETHOD(device_shutdown, bus_generic_shutdown),
 130         {0,0}
 131 };
 132
 133 Static  driver_t uhubroot_driver = {
 134         "uhub",
 135         uhubroot_methods,
 136         sizeof(struct uhub_softc)
 137 };
 138 #endif
 139
 140 USB_MATCH(uhub)
 141 {
 142         USB_MATCH_START(uhub, uaa);
 143         usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device);
 144
 145         DPRINTFN(5,("uhub_match, dd=%p\n", dd));
 146         /*
 147          * The subclass for hubs seems to be 0 for some and 1 for others,
 148          * so we just ignore the subclass.
 149          */
 150         if (uaa->iface == NULL && dd->bDeviceClass == UDCLASS_HUB)
 151                 return (UMATCH_DEVCLASS_DEVSUBCLASS);
 152         return (UMATCH_NONE);
 153 }
 154
 155 USB_ATTACH(uhub)
 156 {
 157         USB_ATTACH_START(uhub, sc, uaa);
 158         usbd_device_handle dev = uaa->device;
 159         char *devinfo;
 160         usbd_status err;
 161         struct usbd_hub *hub;
 162         usb_device_request_t req;
 163         usb_hub_descriptor_t hubdesc;
 164         int p, port, nports, nremov, pwrdly;
 165         usbd_interface_handle iface;
 166         usb_endpoint_descriptor_t *ed;
 167
 168         devinfo = kmalloc(1024, M_TEMP, M_WAITOK);
 169         DPRINTFN(1,("uhub_attach\n"));
 170         sc->sc_hub = dev;
 171         usbd_devinfo(dev, 1, devinfo);
 172         USB_ATTACH_SETUP;
 173         printf("%s: %s\n", USBDEVNAME(sc->sc_dev), devinfo);
 174
 175         err = usbd_set_config_index(dev, 0, 1);
 176         if (err) {
 177                 DPRINTF(("%s: configuration failed, error=%s\n",
 178                          USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
 179                 kfree(devinfo, M_TEMP);
 180                 USB_ATTACH_ERROR_RETURN;
 181         }
 182
 183         if (dev->depth > USB_HUB_MAX_DEPTH) {
 184                 printf("%s: hub depth (%d) exceeded, hub ignored\n",
 185                        USBDEVNAME(sc->sc_dev), USB_HUB_MAX_DEPTH);
 186                 kfree(devinfo, M_TEMP);
 187                 USB_ATTACH_ERROR_RETURN;
 188         }
 189
 190         /* Get hub descriptor. */
 191         req.bmRequestType = UT_READ_CLASS_DEVICE;
 192         req.bRequest = UR_GET_DESCRIPTOR;
 193         USETW2(req.wValue, (dev->address > 1 ? UDESC_HUB : 0), 0);
 194         USETW(req.wIndex, 0);
 195         USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE);
 196         DPRINTFN(1,("usb_init_hub: getting hub descriptor\n"));
 197         err = usbd_do_request(dev, &req, &hubdesc);
 198         nports = hubdesc.bNbrPorts;
 199         if (!err && nports > 7) {
 200                 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8);
 201                 err = usbd_do_request(dev, &req, &hubdesc);
 202         }
 203         if (err) {
 204                 DPRINTF(("%s: getting hub descriptor failed, error=%s\n",
 205                          USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
 206                 kfree(devinfo, M_TEMP);
 207                 USB_ATTACH_ERROR_RETURN;
 208         }
 209
 210         for (nremov = 0, port = 1; port <= nports; port++)
 211                 if (!UHD_NOT_REMOV(&hubdesc, port))
 212                         nremov++;
 213         printf("%s: %d port%s with %d removable, %s powered\n",
 214                USBDEVNAME(sc->sc_dev), nports, nports != 1 ? "s" : "",
 215                nremov, dev->self_powered ? "self" : "bus");
 216
 217         hub = kmalloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port),
 218                      M_USBDEV, M_WAITOK);
 219         dev->hub = hub;
 220         dev->hub->hubsoftc = sc;
 221         hub->explore = uhub_explore;
 222         hub->hubdesc = hubdesc;
 223
 224         DPRINTFN(1,("usbhub_init_hub: selfpowered=%d, parent=%p, "
 225                     "parent->selfpowered=%d\n",
 226                  dev->self_powered, dev->powersrc->parent,
 227                  dev->powersrc->parent ?
 228                  dev->powersrc->parent->self_powered : 0));
 229
 230         if (!dev->self_powered && dev->powersrc->parent != NULL &&
 231             !dev->powersrc->parent->self_powered) {
 232                 printf("%s: bus powered hub connected to bus powered hub, "
 233                        "ignored\n", USBDEVNAME(sc->sc_dev));
 234                 goto bad;
 235         }
 236
 237         /* Set up interrupt pipe. */
 238         err = usbd_device2interface_handle(dev, 0, &iface);
 239         if (err) {
 240                 printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev));
 241                 goto bad;
 242         }
 243         ed = usbd_interface2endpoint_descriptor(iface, 0);
 244         if (ed == NULL) {
 245                 printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev));
 246                 goto bad;
 247         }
 248         if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 249                 printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev));
 250                 goto bad;
 251         }
 252
 253         err = usbd_open_pipe_intr(iface, ed->bEndpointAddress,
 254                   USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_status,
 255                   sizeof(sc->sc_status), uhub_intr, UHUB_INTR_INTERVAL);
 256         if (err) {
 257                 printf("%s: cannot open interrupt pipe\n",
 258                        USBDEVNAME(sc->sc_dev));
 259                 goto bad;
 260         }
 261
 262         /* Wait with power off for a while. */
 263         usbd_delay_ms(dev, USB_POWER_DOWN_TIME);
 264
 265         usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, dev, USBDEV(sc->sc_dev));
 266
 267         /*
 268          * To have the best chance of success we do things in the exact same
 269          * order as Windoze98.  This should not be necessary, but some
 270          * devices do not follow the USB specs to the letter.
 271          *
 272          * These are the events on the bus when a hub is attached:
 273          *  Get device and config descriptors (see attach code)
 274          *  Get hub descriptor (see above)
 275          *  For all ports
 276          *     turn on power
 277          *     wait for power to become stable
 278          * (all below happens in explore code)
 279          *  For all ports
 280          *     clear C_PORT_CONNECTION
 281          *  For all ports
 282          *     get port status
 283          *     if device connected
 284          *        wait 100 ms
 285          *        turn on reset
 286          *        wait
 287          *        clear C_PORT_RESET
 288          *        get port status
 289          *        proceed with device attachment
 290          */
 291
 292         /* Set up data structures */
 293         for (p = 0; p < nports; p++) {
 294                 struct usbd_port *up = &hub->ports[p];
 295                 up->device = 0;
 296                 up->parent = dev;
 297                 up->portno = p+1;
 298                 if (dev->self_powered)
 299                         /* Self powered hub, give ports maximum current. */
 300                         up->power = USB_MAX_POWER;
 301                 else
 302                         up->power = USB_MIN_POWER;
 303         }
 304
 305         /* XXX should check for none, individual, or ganged power? */
 306
 307         pwrdly = dev->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR
 308             + USB_EXTRA_POWER_UP_TIME;
 309         for (port = 1; port <= nports; port++) {
 310                 /* Turn the power on. */
 311                 err = usbd_set_port_feature(dev, port, UHF_PORT_POWER);
 312                 if (err)
 313                         printf("%s: port %d power on failed, %s\n",
 314                                USBDEVNAME(sc->sc_dev), port,
 315                                usbd_errstr(err));
 316                 DPRINTF(("usb_init_port: turn on port %d power\n", port));
 317                 /* Wait for stable power. */
 318                 usbd_delay_ms(dev, pwrdly);
 319         }
 320
 321         /* The usual exploration will finish the setup. */
 322
 323         sc->sc_running = 1;
 324
 325         USB_ATTACH_SUCCESS_RETURN;
 326
 327  bad:
 328         kfree(hub, M_USBDEV);
 329         kfree(devinfo, M_TEMP);
 330         dev->hub = 0;
 331         USB_ATTACH_ERROR_RETURN;
 332 }
 333
 334 usbd_status
 335 uhub_explore(usbd_device_handle dev)
 336 {
 337         usb_hub_descriptor_t *hd = &dev->hub->hubdesc;
 338         struct uhub_softc *sc = dev->hub->hubsoftc;
 339         struct usbd_port *up;
 340         usbd_status err;
 341         int speed;
 342         int port;
 343         int change, status;
 344
 345         DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address));
 346
 347         if (!sc->sc_running)
 348                 return (USBD_NOT_STARTED);
 349
 350         /* Ignore hubs that are too deep. */
 351         if (dev->depth > USB_HUB_MAX_DEPTH)
 352                 return (USBD_TOO_DEEP);
 353
 354         for(port = 1; port <= hd->bNbrPorts; port++) {
 355                 up = &dev->hub->ports[port-1];
 356                 err = usbd_get_port_status(dev, port, &up->status);
 357                 if (err) {
 358                         DPRINTF(("uhub_explore: get port status failed, "
 359                                  "error=%s\n", usbd_errstr(err)));
 360                         continue;
 361                 }
 362                 status = UGETW(up->status.wPortStatus);
 363                 change = UGETW(up->status.wPortChange);
 364                 DPRINTFN(3,("uhub_explore: %s port %d status 0x%04x 0x%04x\n",
 365                             USBDEVNAME(sc->sc_dev), port, status, change));
 366                 if (change & UPS_C_PORT_ENABLED) {
 367                         DPRINTF(("uhub_explore: C_PORT_ENABLED\n"));
 368                         usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);
 369                         if (status & UPS_PORT_ENABLED) {
 370                                 printf("%s: illegal enable change, port %d\n",
 371                                        USBDEVNAME(sc->sc_dev), port);
 372                         } else {
 373                                 /* Port error condition. */
 374                                 if (up->restartcnt) /* no message first time */
 375                                         printf("%s: port error, restarting "
 376                                                "port %d\n",
 377                                                USBDEVNAME(sc->sc_dev), port);
 378
 379                                 if (up->restartcnt++ < USBD_RESTART_MAX)
 380                                         goto disco;
 381                                 else
 382                                         printf("%s: port error, giving up "
 383                                                "port %d\n",
 384                                                USBDEVNAME(sc->sc_dev), port);
 385                         }
 386                 }
 387                 if (!(change & UPS_C_CONNECT_STATUS)) {
 388                         DPRINTFN(3,("uhub_explore: port=%d !C_CONNECT_"
 389                                     "STATUS\n", port));
 390                         /* No status change, just do recursive explore. */
 391                         if (up->device != NULL && up->device->hub != NULL)
 392                                 up->device->hub->explore(up->device);
 393 #if 0 && defined(DIAGNOSTIC)
 394                         if (up->device == NULL &&
 395                             (status & UPS_CURRENT_CONNECT_STATUS))
 396                                 printf("%s: connected, no device\n",
 397                                        USBDEVNAME(sc->sc_dev));
 398 #endif
 399                         continue;
 400                 }
 401
 402                 /* We have a connect status change, handle it. */
 403
 404                 DPRINTF(("uhub_explore: status change hub=%d port=%d\n",
 405                          dev->address, port));
 406                 usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION);
 407                 /*usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);*/
 408                 /*
 409                  * If there is already a device on the port the change status
 410                  * must mean that is has disconnected.  Looking at the
 411                  * current connect status is not enough to figure this out
 412                  * since a new unit may have been connected before we handle
 413                  * the disconnect.
 414                  */
 415         disco:
 416                 if (up->device != NULL) {
 417                         /* Disconnected */
 418                         DPRINTF(("uhub_explore: device addr=%d disappeared "
 419                                  "on port %d\n", up->device->address, port));
 420                         usb_disconnect_port(up, USBDEV(sc->sc_dev));
 421                         usbd_clear_port_feature(dev, port,
 422                                                 UHF_C_PORT_CONNECTION);
 423                 }
 424                 if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
 425                         /* Nothing connected, just ignore it. */
 426                         DPRINTFN(3,("uhub_explore: port=%d !CURRENT_CONNECT"
 427                                     "_STATUS\n", port));
 428                         continue;
 429                 }
 430
 431                 /* Connected */
 432
 433                 if (!(status & UPS_PORT_POWER))
 434                         printf("%s: strange, connected port %d has no power\n",
 435                                USBDEVNAME(sc->sc_dev), port);
 436
 437                 /* Wait for maximum device power up time. */
 438                 usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY);
 439
 440                 /* Reset port, which implies enabling it. */
 441                 if (usbd_reset_port(dev, port, &up->status)) {
 442                         printf("%s: port %d reset failed\n",
 443                                USBDEVNAME(sc->sc_dev), port);
 444                         continue;
 445                 }
 446                 /* Get port status again, it might have changed during reset */
 447                 err = usbd_get_port_status(dev, port, &up->status);
 448                 if (err) {
 449                         DPRINTF(("uhub_explore: get port status failed, "
 450                                  "error=%s\n", usbd_errstr(err)));
 451                         continue;
 452                 }
 453                 status = UGETW(up->status.wPortStatus);
 454                 change = UGETW(up->status.wPortChange);
 455                 if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
 456                         /* Nothing connected, just ignore it. */
 457 #ifdef DIAGNOSTIC
 458                         printf("%s: port %d, device disappeared after reset\n",
 459                                USBDEVNAME(sc->sc_dev), port);
 460 #endif
 461                         continue;
 462                 }
 463
 464                 /* Figure out device speed */
 465                 if (status & UPS_HIGH_SPEED)
 466                         speed = USB_SPEED_HIGH;
 467                 else if (status & UPS_LOW_SPEED)
 468                         speed = USB_SPEED_LOW;
 469                 else
 470                         speed = USB_SPEED_FULL;
 471                 /* Get device info and set its address. */
 472                 err = usbd_new_device(USBDEV(sc->sc_dev), dev->bus,
 473                     dev->depth + 1, speed, port, up);
 474                 /* XXX retry a few times? */
 475                 if (err) {
 476                         DPRINTFN(-1,("uhub_explore: usb_new_device failed, "
 477                                      "error=%s\n", usbd_errstr(err)));
 478                         /* Avoid addressing problems by disabling. */
 479                         /* usbd_reset_port(dev, port, &up->status); */
 480
 481                         /*
 482                          * The unit refused to accept a new address, or had
 483                          * some other serious problem.  Since we cannot leave
 484                          * at 0 we have to disable the port instead.
 485                          */
 486                         printf("%s: device problem, disabling port %d\n",
 487                                USBDEVNAME(sc->sc_dev), port);
 488                         usbd_clear_port_feature(dev, port, UHF_PORT_ENABLE);
 489                 } else {
 490                         /* The port set up succeeded, reset error count. */
 491                         up->restartcnt = 0;
 492
 493                         if (up->device->hub)
 494                                 up->device->hub->explore(up->device);
 495                 }
 496         }
 497         return (USBD_NORMAL_COMPLETION);
 498 }
 499
 500 #if defined(__NetBSD__) || defined(__OpenBSD__)
 501 int
 502 uhub_activate(device_ptr_t self, enum devact act)
 503 {
 504         struct uhub_softc *sc = (struct uhub_softc *)self;
 505         struct usbd_hub *hub = sc->sc_hub->hub;
 506         usbd_device_handle dev;
 507         int nports, port, i;
 508
 509         switch (act) {
 510         case DVACT_ACTIVATE:
 511                 return (EOPNOTSUPP);
 512
 513         case DVACT_DEACTIVATE:
 514                 if (hub == NULL) /* malfunctioning hub */
 515                         break;
 516                 nports = hub->hubdesc.bNbrPorts;
 517                 for(port = 0; port < nports; port++) {
 518                         dev = hub->ports[port].device;
 519                         if (dev != NULL && dev->subdevs != NULL) {
 520                                 for (i = 0; dev->subdevs[i] != NULL; i++)
 521                                         config_deactivate(dev->subdevs[i]);
 522                         }
 523                 }
 524                 break;
 525         }
 526         return (0);
 527 }
 528 #endif
 529
 530 /*
 531  * Called from process context when the hub is gone.
 532  * Detach all devices on active ports.
 533  */
 534 USB_DETACH(uhub)
 535 {
 536         USB_DETACH_START(uhub, sc);
 537         struct usbd_hub *hub = sc->sc_hub->hub;
 538         struct usbd_port *rup;
 539         int port, nports;
 540
 541 #if defined(__NetBSD__) || defined(__OpenBSD__)
 542         DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags));
 543 #elif defined(__FreeBSD__) || defined(__DragonFly__)
 544         DPRINTF(("uhub_detach: sc=%port\n", sc));
 545 #endif
 546
 547         if (hub == NULL)                /* Must be partially working */
 548                 return (0);
 549
 550         usbd_abort_pipe(sc->sc_ipipe);
 551         usbd_close_pipe(sc->sc_ipipe);
 552
 553         nports = hub->hubdesc.bNbrPorts;
 554         for(port = 0; port < nports; port++) {
 555                 rup = &hub->ports[port];
 556                 if (rup->device)
 557                         usb_disconnect_port(rup, self);
 558         }
 559
 560         usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub,
 561                            USBDEV(sc->sc_dev));
 562
 563         kfree(hub, M_USBDEV);
 564         sc->sc_hub->hub = NULL;
 565
 566         return (0);
 567 }
 568
 569 #if defined(__FreeBSD__) || defined(__DragonFly__)
 570 /* Called when a device has been detached from it */
 571 Static void
 572 uhub_child_detached(device_t self, device_t child)
 573 {
 574        struct uhub_softc *sc = device_get_softc(self);
 575        usbd_device_handle devhub = sc->sc_hub;
 576        usbd_device_handle dev;
 577        int nports;
 578        int port;
 579        int i;
 580
 581        if (!devhub->hub)
 582                /* should never happen; children are only created after init */
 583                panic("hub not fully initialised, but child deleted?");
 584
 585        nports = devhub->hub->hubdesc.bNbrPorts;
 586        for (port = 0; port < nports; port++) {
 587                dev = devhub->hub->ports[port].device;
 588                if (dev && dev->subdevs) {
 589                        for (i = 0; dev->subdevs[i]; i++) {
 590                                if (dev->subdevs[i] == child) {
 591                                        dev->subdevs[i] = NULL;
 592                                        return;
 593                                }
 594                        }
 595                }
 596        }
 597 }
 598
 599 Static void
 600 uhub_driver_added(device_t _dev, driver_t *_driver)
 601 {
 602         /* Don't do anything, as reprobing does not work currently. We should
 603          * really call through to usbd_new_device or a function along those
 604          * lines that reinitialises the device if it is not owned by any
 605          * driver. But this is complicated. Manual replugging by the user is
 606          * easier.
 607          */
 608
 609          ;
 610 }
 611 #endif
 612
 613
 614 /*
 615  * Hub interrupt.
 616  * This an indication that some port has changed status.
 617  * Notify the bus event handler thread that we need
 618  * to be explored again.
 619  */
 620 void
 621 uhub_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 622 {
 623         struct uhub_softc *sc = addr;
 624
 625         DPRINTFN(5,("uhub_intr: sc=%p\n", sc));
 626         if (status == USBD_STALLED)
 627                 usbd_clear_endpoint_stall_async(sc->sc_ipipe);
 628         else if (status == USBD_NORMAL_COMPLETION)
 629                 usb_needs_explore(sc->sc_hub);
 630 }
 631
 632 #if defined(__FreeBSD__) || defined(__DragonFly__)
 633 DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0);
 634 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0);
 635 #endif