1 /* $OpenBSD: uhub.c,v 1.39 2007/05/27 04:00:25 jsg Exp $ */ 2 /* $NetBSD: uhub.c,v 1.64 2003/02/08 03:32:51 ichiro Exp $ */ 3 /* $FreeBSD: src/sys/dev/usb/uhub.c,v 1.18 1999/11/17 22:33:43 n_hibma Exp $ */ 4 5 /* 6 * Copyright (c) 1998 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Lennart Augustsson (lennart@augustsson.net) at 11 * Carlstedt Research & Technology. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * USB spec: http://www.usb.org/developers/docs/usbspec.zip 44 */ 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/malloc.h> 50 #if defined(__NetBSD__) || defined(__OpenBSD__) 51 #include <sys/device.h> 52 #include <sys/proc.h> 53 #elif defined(__FreeBSD__) 54 #include <sys/module.h> 55 #include <sys/bus.h> 56 #include "bus_if.h" 57 #endif 58 59 #include <machine/bus.h> 60 61 #include <dev/usb/usb.h> 62 #include <dev/usb/usbdi.h> 63 #include <dev/usb/usbdi_util.h> 64 #include <dev/usb/usbdivar.h> 65 66 #define UHUB_INTR_INTERVAL 255 /* ms */ 67 68 #ifdef UHUB_DEBUG 69 #define DPRINTF(x) do { if (uhubdebug) printf x; } while (0) 70 #define DPRINTFN(n,x) do { if (uhubdebug>(n)) printf x; } while (0) 71 int uhubdebug = 0; 72 #else 73 #define DPRINTF(x) 74 #define DPRINTFN(n,x) 75 #endif 76 77 struct uhub_softc { 78 USBBASEDEVICE sc_dev; /* base device */ 79 usbd_device_handle sc_hub; /* USB device */ 80 usbd_pipe_handle sc_ipipe; /* interrupt pipe */ 81 u_int8_t sc_status[1]; /* XXX more ports */ 82 u_char sc_running; 83 }; 84 #define UHUB_PROTO(sc) ((sc)->sc_hub->ddesc.bDeviceProtocol) 85 #define UHUB_IS_HIGH_SPEED(sc) (UHUB_PROTO(sc) != UDPROTO_FSHUB) 86 #define UHUB_IS_SINGLE_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBSTT) 87 88 Static usbd_status uhub_explore(usbd_device_handle hub); 89 Static void uhub_intr(usbd_xfer_handle, usbd_private_handle,usbd_status); 90 91 #if defined(__FreeBSD__) 92 Static bus_child_detached_t uhub_child_detached; 93 #endif 94 95 96 /* 97 * We need two attachment points: 98 * hub to usb and hub to hub 99 * Every other driver only connects to hubs 100 */ 101 102 #if defined(__NetBSD__) || defined(__OpenBSD__) 103 USB_DECLARE_DRIVER(uhub); 104 105 #if defined(__NetBSD__) 106 /* Create the driver instance for the hub connected to hub case */ 107 CFATTACH_DECL(uhub_uhub, sizeof(struct uhub_softc), 108 uhub_match, uhub_attach, uhub_detach, uhub_activate); 109 #else 110 struct cfattach uhub_uhub_ca = { 111 sizeof(struct uhub_softc), uhub_match, uhub_attach, 112 uhub_detach, uhub_activate 113 }; 114 #endif 115 #elif defined(__FreeBSD__) 116 USB_DECLARE_DRIVER_INIT(uhub, 117 DEVMETHOD(bus_child_detached, uhub_child_detached)); 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 {0,0} 128 }; 129 130 Static driver_t uhubroot_driver = { 131 "uhub", 132 uhubroot_methods, 133 sizeof(struct uhub_softc) 134 }; 135 #endif 136 137 int 138 uhub_match(struct device *parent, void *match, void *aux) 139 { 140 struct usb_attach_arg *uaa = aux; 141 usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device); 142 143 DPRINTFN(5,("uhub_match, dd=%p\n", dd)); 144 /* 145 * The subclass for hubs seems to be 0 for some and 1 for others, 146 * so we just ignore the subclass. 147 */ 148 if (uaa->iface == NULL && dd->bDeviceClass == UDCLASS_HUB) 149 return (UMATCH_DEVCLASS_DEVSUBCLASS); 150 return (UMATCH_NONE); 151 } 152 153 void 154 uhub_attach(struct device *parent, struct device *self, void *aux) 155 { 156 struct uhub_softc *sc = (struct uhub_softc *)self; 157 struct usb_attach_arg *uaa = aux; 158 usbd_device_handle dev = uaa->device; 159 char *devinfop; 160 usbd_status err; 161 struct usbd_hub *hub = NULL; 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 struct usbd_tt *tts = NULL; 168 169 DPRINTFN(1,("uhub_attach\n")); 170 sc->sc_hub = dev; 171 172 devinfop = usbd_devinfo_alloc(dev, 0); 173 printf("\n%s: %s\n", USBDEVNAME(sc->sc_dev), devinfop); 174 usbd_devinfo_free(devinfop); 175 176 err = usbd_set_config_index(dev, 0, 1); 177 if (err) { 178 DPRINTF(("%s: configuration failed, error=%s\n", 179 USBDEVNAME(sc->sc_dev), usbd_errstr(err))); 180 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 return; 187 } 188 189 /* Get hub descriptor. */ 190 req.bmRequestType = UT_READ_CLASS_DEVICE; 191 req.bRequest = UR_GET_DESCRIPTOR; 192 USETW2(req.wValue, UDESC_HUB, 0); 193 USETW(req.wIndex, 0); 194 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE); 195 DPRINTFN(1,("usb_init_hub: getting hub descriptor\n")); 196 err = usbd_do_request(dev, &req, &hubdesc); 197 nports = hubdesc.bNbrPorts; 198 if (!err && nports > 7) { 199 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8); 200 err = usbd_do_request(dev, &req, &hubdesc); 201 } 202 if (err) { 203 DPRINTF(("%s: getting hub descriptor failed, error=%s\n", 204 USBDEVNAME(sc->sc_dev), usbd_errstr(err))); 205 return; 206 } 207 208 for (nremov = 0, port = 1; port <= nports; port++) 209 if (!UHD_NOT_REMOV(&hubdesc, port)) 210 nremov++; 211 printf("%s: %d port%s with %d removable, %s powered", 212 USBDEVNAME(sc->sc_dev), nports, nports != 1 ? "s" : "", 213 nremov, dev->self_powered ? "self" : "bus"); 214 215 if (dev->depth > 0 && UHUB_IS_HIGH_SPEED(sc)) { 216 printf(", %s transaction translator%s", 217 UHUB_IS_SINGLE_TT(sc) ? "single" : "multiple", 218 UHUB_IS_SINGLE_TT(sc) ? "" : "s"); 219 } 220 printf("\n"); 221 222 if (nports == 0) { 223 printf("%s: no ports, hub ignored\n", USBDEVNAME(sc->sc_dev)); 224 goto bad; 225 } 226 227 hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port), 228 M_USBDEV, M_NOWAIT); 229 if (hub == NULL) 230 return; 231 dev->hub = hub; 232 dev->hub->hubsoftc = sc; 233 hub->explore = uhub_explore; 234 hub->hubdesc = hubdesc; 235 236 DPRINTFN(1,("usbhub_init_hub: selfpowered=%d, parent=%p, " 237 "parent->selfpowered=%d\n", 238 dev->self_powered, dev->powersrc->parent, 239 dev->powersrc->parent ? 240 dev->powersrc->parent->self_powered : 0)); 241 242 if (!dev->self_powered && dev->powersrc->parent != NULL && 243 !dev->powersrc->parent->self_powered) { 244 printf("%s: bus powered hub connected to bus powered hub, " 245 "ignored\n", USBDEVNAME(sc->sc_dev)); 246 goto bad; 247 } 248 249 /* Set up interrupt pipe. */ 250 err = usbd_device2interface_handle(dev, 0, &iface); 251 if (err) { 252 printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev)); 253 goto bad; 254 } 255 ed = usbd_interface2endpoint_descriptor(iface, 0); 256 if (ed == NULL) { 257 printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev)); 258 goto bad; 259 } 260 if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) { 261 printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev)); 262 goto bad; 263 } 264 265 err = usbd_open_pipe_intr(iface, ed->bEndpointAddress, 266 USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_status, 267 sizeof(sc->sc_status), uhub_intr, UHUB_INTR_INTERVAL); 268 if (err) { 269 printf("%s: cannot open interrupt pipe\n", 270 USBDEVNAME(sc->sc_dev)); 271 goto bad; 272 } 273 274 /* Wait with power off for a while. */ 275 usbd_delay_ms(dev, USB_POWER_DOWN_TIME); 276 277 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, dev, USBDEV(sc->sc_dev)); 278 279 /* 280 * To have the best chance of success we do things in the exact same 281 * order as Windoze98. This should not be necessary, but some 282 * devices do not follow the USB specs to the letter. 283 * 284 * These are the events on the bus when a hub is attached: 285 * Get device and config descriptors (see attach code) 286 * Get hub descriptor (see above) 287 * For all ports 288 * turn on power 289 * wait for power to become stable 290 * (all below happens in explore code) 291 * For all ports 292 * clear C_PORT_CONNECTION 293 * For all ports 294 * get port status 295 * if device connected 296 * wait 100 ms 297 * turn on reset 298 * wait 299 * clear C_PORT_RESET 300 * get port status 301 * proceed with device attachment 302 */ 303 304 if (UHUB_IS_HIGH_SPEED(sc)) { 305 tts = malloc((UHUB_IS_SINGLE_TT(sc) ? 1 : nports) * 306 sizeof (struct usbd_tt), M_USBDEV, M_NOWAIT); 307 if (!tts) 308 goto bad; 309 } 310 /* Set up data structures */ 311 for (p = 0; p < nports; p++) { 312 struct usbd_port *up = &hub->ports[p]; 313 up->device = NULL; 314 up->parent = dev; 315 up->portno = p+1; 316 if (dev->self_powered) 317 /* Self powered hub, give ports maximum current. */ 318 up->power = USB_MAX_POWER; 319 else 320 up->power = USB_MIN_POWER; 321 up->restartcnt = 0; 322 up->reattach = 0; 323 if (UHUB_IS_HIGH_SPEED(sc)) { 324 up->tt = &tts[UHUB_IS_SINGLE_TT(sc) ? 0 : p]; 325 up->tt->hub = hub; 326 } else { 327 up->tt = NULL; 328 } 329 } 330 331 /* XXX should check for none, individual, or ganged power? */ 332 333 pwrdly = dev->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR 334 + USB_EXTRA_POWER_UP_TIME; 335 for (port = 1; port <= nports; port++) { 336 /* Turn the power on. */ 337 err = usbd_set_port_feature(dev, port, UHF_PORT_POWER); 338 if (err) 339 printf("%s: port %d power on failed, %s\n", 340 USBDEVNAME(sc->sc_dev), port, 341 usbd_errstr(err)); 342 DPRINTF(("usb_init_port: turn on port %d power\n", port)); 343 } 344 345 /* Wait for stable power. Root hubs delay in their event thread. */ 346 if (dev->powersrc->parent != NULL) 347 usbd_delay_ms(dev, pwrdly); 348 349 /* The usual exploration will finish the setup. */ 350 351 sc->sc_running = 1; 352 353 return; 354 355 bad: 356 if (hub) 357 free(hub, M_USBDEV); 358 dev->hub = NULL; 359 } 360 361 usbd_status 362 uhub_explore(usbd_device_handle dev) 363 { 364 usb_hub_descriptor_t *hd = &dev->hub->hubdesc; 365 struct uhub_softc *sc = dev->hub->hubsoftc; 366 struct usbd_port *up; 367 usbd_status err; 368 int speed; 369 int port; 370 int change, status, reconnect; 371 372 DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address)); 373 374 if (!sc->sc_running) 375 return (USBD_NOT_STARTED); 376 377 /* Ignore hubs that are too deep. */ 378 if (dev->depth > USB_HUB_MAX_DEPTH) 379 return (USBD_TOO_DEEP); 380 381 for(port = 1; port <= hd->bNbrPorts; port++) { 382 up = &dev->hub->ports[port-1]; 383 err = usbd_get_port_status(dev, port, &up->status); 384 if (err) { 385 DPRINTF(("uhub_explore: get port status failed, " 386 "error=%s\n", usbd_errstr(err))); 387 continue; 388 } 389 status = UGETW(up->status.wPortStatus); 390 change = UGETW(up->status.wPortChange); 391 reconnect = up->reattach; 392 up->reattach = 0; 393 DPRINTFN(3,("uhub_explore: %s port %d status 0x%04x 0x%04x\n", 394 USBDEVNAME(sc->sc_dev), port, status, change)); 395 if (change & UPS_C_PORT_ENABLED) { 396 DPRINTF(("uhub_explore: C_PORT_ENABLED\n")); 397 usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE); 398 if (change & UPS_C_CONNECT_STATUS) { 399 /* Ignore the port error if the device 400 vanished. */ 401 } else if (status & UPS_PORT_ENABLED) { 402 printf("%s: illegal enable change, port %d\n", 403 USBDEVNAME(sc->sc_dev), port); 404 } else { 405 /* Port error condition. */ 406 if (up->restartcnt) /* no message first time */ 407 printf("%s: port error, restarting " 408 "port %d\n", 409 USBDEVNAME(sc->sc_dev), port); 410 411 if (up->restartcnt++ < USBD_RESTART_MAX) 412 goto disco; 413 else 414 printf("%s: port error, giving up " 415 "port %d\n", 416 USBDEVNAME(sc->sc_dev), port); 417 } 418 } 419 if (!reconnect && !(change & UPS_C_CONNECT_STATUS)) { 420 DPRINTFN(3,("uhub_explore: port=%d !C_CONNECT_" 421 "STATUS\n", port)); 422 /* No status change, just do recursive explore. */ 423 if (up->device != NULL && up->device->hub != NULL) 424 up->device->hub->explore(up->device); 425 #if 0 && defined(DIAGNOSTIC) 426 if (up->device == NULL && 427 (status & UPS_CURRENT_CONNECT_STATUS)) 428 printf("%s: connected, no device\n", 429 USBDEVNAME(sc->sc_dev)); 430 #endif 431 continue; 432 } 433 434 /* We have a connect status change, handle it. */ 435 436 DPRINTF(("uhub_explore: status change hub=%d port=%d\n", 437 dev->address, port)); 438 usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION); 439 /*usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);*/ 440 /* 441 * If there is already a device on the port the change status 442 * must mean that is has disconnected. Looking at the 443 * current connect status is not enough to figure this out 444 * since a new unit may have been connected before we handle 445 * the disconnect. 446 */ 447 disco: 448 if (up->device != NULL) { 449 /* Disconnected */ 450 DPRINTF(("uhub_explore: device addr=%d disappeared " 451 "on port %d\n", up->device->address, port)); 452 usb_disconnect_port(up, USBDEV(sc->sc_dev)); 453 usbd_clear_port_feature(dev, port, 454 UHF_C_PORT_CONNECTION); 455 } 456 if (!(status & UPS_CURRENT_CONNECT_STATUS)) { 457 /* Nothing connected, just ignore it. */ 458 DPRINTFN(3,("uhub_explore: port=%d !CURRENT_CONNECT" 459 "_STATUS\n", port)); 460 continue; 461 } 462 463 /* Connected */ 464 465 if (!(status & UPS_PORT_POWER)) 466 printf("%s: strange, connected port %d has no power\n", 467 USBDEVNAME(sc->sc_dev), port); 468 469 /* Wait for maximum device power up time. */ 470 usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY); 471 472 /* Reset port, which implies enabling it. */ 473 if (usbd_reset_port(dev, port, &up->status)) { 474 printf("%s: port %d reset failed\n", 475 USBDEVNAME(sc->sc_dev), port); 476 continue; 477 } 478 /* Get port status again, it might have changed during reset */ 479 err = usbd_get_port_status(dev, port, &up->status); 480 if (err) { 481 DPRINTF(("uhub_explore: get port status failed, " 482 "error=%s\n", usbd_errstr(err))); 483 continue; 484 } 485 status = UGETW(up->status.wPortStatus); 486 change = UGETW(up->status.wPortChange); 487 if (!(status & UPS_CURRENT_CONNECT_STATUS)) { 488 /* Nothing connected, just ignore it. */ 489 #ifdef UHUB_DEBUG 490 printf("%s: port %d, device disappeared after reset\n", 491 USBDEVNAME(sc->sc_dev), port); 492 #endif 493 continue; 494 } 495 496 /* Figure out device speed */ 497 if (status & UPS_HIGH_SPEED) 498 speed = USB_SPEED_HIGH; 499 else if (status & UPS_LOW_SPEED) 500 speed = USB_SPEED_LOW; 501 else 502 speed = USB_SPEED_FULL; 503 /* Get device info and set its address. */ 504 err = usbd_new_device(USBDEV(sc->sc_dev), dev->bus, 505 dev->depth + 1, speed, port, up); 506 /* XXX retry a few times? */ 507 if (err) { 508 DPRINTFN(-1,("uhub_explore: usbd_new_device failed, " 509 "error=%s\n", usbd_errstr(err))); 510 /* Avoid addressing problems by disabling. */ 511 /* usbd_reset_port(dev, port, &up->status); */ 512 513 /* 514 * The unit refused to accept a new address, or had 515 * some other serious problem. Since we cannot leave 516 * at 0 we have to disable the port instead. 517 */ 518 printf("%s: device problem, disabling port %d\n", 519 USBDEVNAME(sc->sc_dev), port); 520 usbd_clear_port_feature(dev, port, UHF_PORT_ENABLE); 521 } else { 522 /* The port set up succeeded, reset error count. */ 523 up->restartcnt = 0; 524 525 if (up->device->hub) 526 up->device->hub->explore(up->device); 527 } 528 } 529 return (USBD_NORMAL_COMPLETION); 530 } 531 532 #if defined(__NetBSD__) || defined(__OpenBSD__) 533 int 534 uhub_activate(device_ptr_t self, enum devact act) 535 { 536 struct uhub_softc *sc = (struct uhub_softc *)self; 537 struct usbd_hub *hub = sc->sc_hub->hub; 538 usbd_device_handle dev; 539 int nports, port, i; 540 541 switch (act) { 542 case DVACT_ACTIVATE: 543 break; 544 545 case DVACT_DEACTIVATE: 546 if (hub == NULL) /* malfunctioning hub */ 547 break; 548 nports = hub->hubdesc.bNbrPorts; 549 for(port = 0; port < nports; port++) { 550 dev = hub->ports[port].device; 551 if (dev != NULL && dev->subdevs != NULL) { 552 for (i = 0; dev->subdevs[i] != NULL; i++) 553 config_deactivate(dev->subdevs[i]); 554 } 555 } 556 break; 557 } 558 return (0); 559 } 560 #endif 561 562 /* 563 * Called from process context when the hub is gone. 564 * Detach all devices on active ports. 565 */ 566 int 567 uhub_detach(struct device *self, int flags) 568 { 569 struct uhub_softc *sc = (struct uhub_softc *)self; 570 struct usbd_hub *hub = sc->sc_hub->hub; 571 struct usbd_port *rup; 572 int port, nports; 573 574 #if defined(__NetBSD__) || defined(__OpenBSD__) 575 DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags)); 576 #elif defined(__FreeBSD__) 577 DPRINTF(("uhub_detach: sc=%port\n", sc)); 578 #endif 579 580 if (hub == NULL) /* Must be partially working */ 581 return (0); 582 583 usbd_abort_pipe(sc->sc_ipipe); 584 usbd_close_pipe(sc->sc_ipipe); 585 586 nports = hub->hubdesc.bNbrPorts; 587 for(port = 0; port < nports; port++) { 588 rup = &hub->ports[port]; 589 if (rup->device) 590 usb_disconnect_port(rup, self); 591 } 592 593 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub, 594 USBDEV(sc->sc_dev)); 595 596 if (hub->ports[0].tt) 597 free(hub->ports[0].tt, M_USBDEV); 598 free(hub, M_USBDEV); 599 sc->sc_hub->hub = NULL; 600 601 return (0); 602 } 603 604 #if defined(__FreeBSD__) 605 /* Called when a device has been detached from it */ 606 Static void 607 uhub_child_detached(device_t self, device_t child) 608 { 609 struct uhub_softc *sc = device_get_softc(self); 610 usbd_device_handle devhub = sc->sc_hub; 611 usbd_device_handle dev; 612 int nports; 613 int port; 614 int i; 615 616 if (!devhub->hub) 617 /* should never happen; children are only created after init */ 618 panic("hub not fully initialised, but child deleted?"); 619 620 nports = devhub->hub->hubdesc.bNbrPorts; 621 for (port = 0; port < nports; port++) { 622 dev = devhub->hub->ports[port].device; 623 if (dev && dev->subdevs) { 624 for (i = 0; dev->subdevs[i]; i++) { 625 if (dev->subdevs[i] == child) { 626 dev->subdevs[i] = NULL; 627 return; 628 } 629 } 630 } 631 } 632 } 633 #endif 634 635 636 /* 637 * Hub interrupt. 638 * This an indication that some port has changed status. 639 * Notify the bus event handler thread that we need 640 * to be explored again. 641 */ 642 void 643 uhub_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status) 644 { 645 struct uhub_softc *sc = addr; 646 647 DPRINTFN(5,("uhub_intr: sc=%p\n", sc)); 648 if (status == USBD_STALLED) 649 usbd_clear_endpoint_stall_async(sc->sc_ipipe); 650 else if (status == USBD_NORMAL_COMPLETION) 651 usb_needs_explore(sc->sc_hub); 652 } 653 654 #if defined(__FreeBSD__) 655 DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0); 656 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0); 657 #endif 658