uhub.c revision 1.82
1 /* $NetBSD: uhub.c,v 1.82 2006/11/30 16:30:33 drochner Exp $ */ 2 /* $FreeBSD: src/sys/dev/usb/uhub.c,v 1.18 1999/11/17 22:33:43 n_hibma Exp $ */ 3 4 /* 5 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Lennart Augustsson (lennart (at) augustsson.net) at 10 * Carlstedt Research & Technology. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /* 42 * USB spec: http://www.usb.org/developers/docs/usbspec.zip 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: uhub.c,v 1.82 2006/11/30 16:30:33 drochner Exp $"); 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__) 56 #include <sys/module.h> 57 #include <sys/bus.h> 58 #include "bus_if.h" 59 #endif 60 61 #include <machine/bus.h> 62 63 #include <dev/usb/usb.h> 64 #include <dev/usb/usbdi.h> 65 #include <dev/usb/usbdi_util.h> 66 #include <dev/usb/usbdivar.h> 67 68 #ifdef UHUB_DEBUG 69 #define DPRINTF(x) if (uhubdebug) logprintf x 70 #define DPRINTFN(n,x) if (uhubdebug>(n)) logprintf x 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 #elif defined(__FreeBSD__) 105 USB_DECLARE_DRIVER_INIT(uhub, 106 DEVMETHOD(bus_child_detached, uhub_child_detached)); 107 108 /* Create the driver instance for the hub connected to usb case. */ 109 devclass_t uhubroot_devclass; 110 111 Static device_method_t uhubroot_methods[] = { 112 DEVMETHOD(device_probe, uhub_match), 113 DEVMETHOD(device_attach, uhub_attach), 114 115 /* detach is not allowed for a root hub */ 116 {0,0} 117 }; 118 119 Static driver_t uhubroot_driver = { 120 "uhub", 121 uhubroot_methods, 122 sizeof(struct uhub_softc) 123 }; 124 #endif 125 126 USB_MATCH(uhub) 127 { 128 USB_MATCH_START(uhub, uaa); 129 usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device); 130 131 DPRINTFN(5,("uhub_match, dd=%p\n", dd)); 132 /* 133 * The subclass for hubs seems to be 0 for some and 1 for others, 134 * so we just ignore the subclass. 135 */ 136 if (uaa->iface == NULL && dd->bDeviceClass == UDCLASS_HUB) 137 return (UMATCH_DEVCLASS_DEVSUBCLASS); 138 return (UMATCH_NONE); 139 } 140 141 USB_ATTACH(uhub) 142 { 143 USB_ATTACH_START(uhub, sc, uaa); 144 usbd_device_handle dev = uaa->device; 145 char *devinfop; 146 usbd_status err; 147 struct usbd_hub *hub = NULL; 148 usb_device_request_t req; 149 usb_hub_descriptor_t hubdesc; 150 int p, port, nports, nremov, pwrdly; 151 usbd_interface_handle iface; 152 usb_endpoint_descriptor_t *ed; 153 struct usbd_tt *tts = NULL; 154 155 DPRINTFN(1,("uhub_attach\n")); 156 sc->sc_hub = dev; 157 158 devinfop = usbd_devinfo_alloc(dev, 1); 159 USB_ATTACH_SETUP; 160 printf("%s: %s\n", USBDEVNAME(sc->sc_dev), devinfop); 161 usbd_devinfo_free(devinfop); 162 163 if (dev->depth > 0 && UHUB_IS_HIGH_SPEED(sc)) { 164 printf("%s: %s transaction translator%s\n", 165 USBDEVNAME(sc->sc_dev), 166 UHUB_IS_SINGLE_TT(sc) ? "single" : "multiple", 167 UHUB_IS_SINGLE_TT(sc) ? "" : "s"); 168 } 169 170 err = usbd_set_config_index(dev, 0, 1); 171 if (err) { 172 DPRINTF(("%s: configuration failed, error=%s\n", 173 USBDEVNAME(sc->sc_dev), usbd_errstr(err))); 174 USB_ATTACH_ERROR_RETURN; 175 } 176 177 if (dev->depth > USB_HUB_MAX_DEPTH) { 178 printf("%s: hub depth (%d) exceeded, hub ignored\n", 179 USBDEVNAME(sc->sc_dev), USB_HUB_MAX_DEPTH); 180 USB_ATTACH_ERROR_RETURN; 181 } 182 183 /* Get hub descriptor. */ 184 req.bmRequestType = UT_READ_CLASS_DEVICE; 185 req.bRequest = UR_GET_DESCRIPTOR; 186 USETW2(req.wValue, UDESC_HUB, 0); 187 USETW(req.wIndex, 0); 188 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE); 189 DPRINTFN(1,("usb_init_hub: getting hub descriptor\n")); 190 err = usbd_do_request(dev, &req, &hubdesc); 191 nports = hubdesc.bNbrPorts; 192 if (!err && nports > 7) { 193 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8); 194 err = usbd_do_request(dev, &req, &hubdesc); 195 } 196 if (err) { 197 DPRINTF(("%s: getting hub descriptor failed, error=%s\n", 198 USBDEVNAME(sc->sc_dev), usbd_errstr(err))); 199 USB_ATTACH_ERROR_RETURN; 200 } 201 202 for (nremov = 0, port = 1; port <= nports; port++) 203 if (!UHD_NOT_REMOV(&hubdesc, port)) 204 nremov++; 205 printf("%s: %d port%s with %d removable, %s powered\n", 206 USBDEVNAME(sc->sc_dev), nports, nports != 1 ? "s" : "", 207 nremov, dev->self_powered ? "self" : "bus"); 208 209 if (nports == 0) { 210 printf("%s: no ports, hub ignored\n", USBDEVNAME(sc->sc_dev)); 211 goto bad; 212 } 213 214 hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port), 215 M_USBDEV, M_NOWAIT); 216 if (hub == NULL) 217 USB_ATTACH_ERROR_RETURN; 218 dev->hub = hub; 219 dev->hub->hubsoftc = sc; 220 hub->explore = uhub_explore; 221 hub->hubdesc = hubdesc; 222 223 DPRINTFN(1,("usbhub_init_hub: selfpowered=%d, parent=%p, " 224 "parent->selfpowered=%d\n", 225 dev->self_powered, dev->powersrc->parent, 226 dev->powersrc->parent ? 227 dev->powersrc->parent->self_powered : 0)); 228 229 if (!dev->self_powered && dev->powersrc->parent != NULL && 230 !dev->powersrc->parent->self_powered) { 231 printf("%s: bus powered hub connected to bus powered hub, " 232 "ignored\n", USBDEVNAME(sc->sc_dev)); 233 goto bad; 234 } 235 236 /* Set up interrupt pipe. */ 237 err = usbd_device2interface_handle(dev, 0, &iface); 238 if (err) { 239 printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev)); 240 goto bad; 241 } 242 ed = usbd_interface2endpoint_descriptor(iface, 0); 243 if (ed == NULL) { 244 printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev)); 245 goto bad; 246 } 247 if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) { 248 printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev)); 249 goto bad; 250 } 251 252 err = usbd_open_pipe_intr(iface, ed->bEndpointAddress, 253 USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_status, 254 sizeof(sc->sc_status), uhub_intr, USBD_DEFAULT_INTERVAL); 255 if (err) { 256 printf("%s: cannot open interrupt pipe\n", 257 USBDEVNAME(sc->sc_dev)); 258 goto bad; 259 } 260 261 /* Wait with power off for a while. */ 262 usbd_delay_ms(dev, USB_POWER_DOWN_TIME); 263 264 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, dev, USBDEV(sc->sc_dev)); 265 266 /* 267 * To have the best chance of success we do things in the exact same 268 * order as Windoze98. This should not be necessary, but some 269 * devices do not follow the USB specs to the letter. 270 * 271 * These are the events on the bus when a hub is attached: 272 * Get device and config descriptors (see attach code) 273 * Get hub descriptor (see above) 274 * For all ports 275 * turn on power 276 * wait for power to become stable 277 * (all below happens in explore code) 278 * For all ports 279 * clear C_PORT_CONNECTION 280 * For all ports 281 * get port status 282 * if device connected 283 * wait 100 ms 284 * turn on reset 285 * wait 286 * clear C_PORT_RESET 287 * get port status 288 * proceed with device attachment 289 */ 290 291 if (UHUB_IS_HIGH_SPEED(sc) && nports > 0) { 292 tts = malloc((UHUB_IS_SINGLE_TT(sc) ? 1 : nports) * 293 sizeof (struct usbd_tt), M_USBDEV, M_NOWAIT); 294 if (!tts) 295 goto bad; 296 } 297 /* Set up data structures */ 298 for (p = 0; p < nports; p++) { 299 struct usbd_port *up = &hub->ports[p]; 300 up->device = NULL; 301 up->parent = dev; 302 up->portno = p+1; 303 if (dev->self_powered) 304 /* Self powered hub, give ports maximum current. */ 305 up->power = USB_MAX_POWER; 306 else 307 up->power = USB_MIN_POWER; 308 up->restartcnt = 0; 309 up->reattach = 0; 310 if (UHUB_IS_HIGH_SPEED(sc)) { 311 up->tt = &tts[UHUB_IS_SINGLE_TT(sc) ? 0 : p]; 312 up->tt->hub = hub; 313 } else { 314 up->tt = NULL; 315 } 316 } 317 318 /* XXX should check for none, individual, or ganged power? */ 319 320 pwrdly = dev->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR 321 + USB_EXTRA_POWER_UP_TIME; 322 for (port = 1; port <= nports; port++) { 323 /* Turn the power on. */ 324 err = usbd_set_port_feature(dev, port, UHF_PORT_POWER); 325 if (err) 326 printf("%s: port %d power on failed, %s\n", 327 USBDEVNAME(sc->sc_dev), port, 328 usbd_errstr(err)); 329 DPRINTF(("usb_init_port: turn on port %d power\n", port)); 330 /* Wait for stable power. */ 331 usbd_delay_ms(dev, pwrdly); 332 } 333 334 /* The usual exploration will finish the setup. */ 335 336 sc->sc_running = 1; 337 338 USB_ATTACH_SUCCESS_RETURN; 339 340 bad: 341 if (hub) 342 free(hub, M_USBDEV); 343 dev->hub = NULL; 344 USB_ATTACH_ERROR_RETURN; 345 } 346 347 usbd_status 348 uhub_explore(usbd_device_handle dev) 349 { 350 usb_hub_descriptor_t *hd = &dev->hub->hubdesc; 351 struct uhub_softc *sc = dev->hub->hubsoftc; 352 struct usbd_port *up; 353 usbd_status err; 354 int speed; 355 int port; 356 int change, status, reconnect; 357 358 DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address)); 359 360 if (!sc->sc_running) 361 return (USBD_NOT_STARTED); 362 363 /* Ignore hubs that are too deep. */ 364 if (dev->depth > USB_HUB_MAX_DEPTH) 365 return (USBD_TOO_DEEP); 366 367 for(port = 1; port <= hd->bNbrPorts; port++) { 368 up = &dev->hub->ports[port-1]; 369 err = usbd_get_port_status(dev, port, &up->status); 370 if (err) { 371 DPRINTF(("uhub_explore: get port status failed, " 372 "error=%s\n", usbd_errstr(err))); 373 continue; 374 } 375 status = UGETW(up->status.wPortStatus); 376 change = UGETW(up->status.wPortChange); 377 reconnect = up->reattach; 378 up->reattach = 0; 379 DPRINTFN(3,("uhub_explore: %s port %d status 0x%04x 0x%04x\n", 380 USBDEVNAME(sc->sc_dev), port, status, change)); 381 if (change & UPS_C_PORT_ENABLED) { 382 DPRINTF(("uhub_explore: C_PORT_ENABLED\n")); 383 usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE); 384 if (change & UPS_C_CONNECT_STATUS) { 385 /* Ignore the port error if the device 386 vanished. */ 387 } else if (status & UPS_PORT_ENABLED) { 388 printf("%s: illegal enable change, port %d\n", 389 USBDEVNAME(sc->sc_dev), port); 390 } else { 391 /* Port error condition. */ 392 if (up->restartcnt) /* no message first time */ 393 printf("%s: port error, restarting " 394 "port %d\n", 395 USBDEVNAME(sc->sc_dev), port); 396 397 if (up->restartcnt++ < USBD_RESTART_MAX) 398 goto disco; 399 else 400 printf("%s: port error, giving up " 401 "port %d\n", 402 USBDEVNAME(sc->sc_dev), port); 403 } 404 } 405 if (!reconnect && !(change & UPS_C_CONNECT_STATUS)) { 406 DPRINTFN(3,("uhub_explore: port=%d !C_CONNECT_" 407 "STATUS\n", port)); 408 /* No status change, just do recursive explore. */ 409 if (up->device != NULL && up->device->hub != NULL) 410 up->device->hub->explore(up->device); 411 #if 0 && defined(DIAGNOSTIC) 412 if (up->device == NULL && 413 (status & UPS_CURRENT_CONNECT_STATUS)) 414 printf("%s: connected, no device\n", 415 USBDEVNAME(sc->sc_dev)); 416 #endif 417 continue; 418 } 419 420 /* We have a connect status change, handle it. */ 421 422 DPRINTF(("uhub_explore: status change hub=%d port=%d\n", 423 dev->address, port)); 424 usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION); 425 /*usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);*/ 426 /* 427 * If there is already a device on the port the change status 428 * must mean that is has disconnected. Looking at the 429 * current connect status is not enough to figure this out 430 * since a new unit may have been connected before we handle 431 * the disconnect. 432 */ 433 disco: 434 if (up->device != NULL) { 435 /* Disconnected */ 436 DPRINTF(("uhub_explore: device addr=%d disappeared " 437 "on port %d\n", up->device->address, port)); 438 usb_disconnect_port(up, USBDEV(sc->sc_dev)); 439 usbd_clear_port_feature(dev, port, 440 UHF_C_PORT_CONNECTION); 441 } 442 if (!(status & UPS_CURRENT_CONNECT_STATUS)) { 443 /* Nothing connected, just ignore it. */ 444 DPRINTFN(3,("uhub_explore: port=%d !CURRENT_CONNECT" 445 "_STATUS\n", port)); 446 continue; 447 } 448 449 /* Connected */ 450 451 if (!(status & UPS_PORT_POWER)) 452 printf("%s: strange, connected port %d has no power\n", 453 USBDEVNAME(sc->sc_dev), port); 454 455 /* Wait for maximum device power up time. */ 456 usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY); 457 458 /* Reset port, which implies enabling it. */ 459 if (usbd_reset_port(dev, port, &up->status)) { 460 printf("%s: port %d reset failed\n", 461 USBDEVNAME(sc->sc_dev), port); 462 continue; 463 } 464 /* Get port status again, it might have changed during reset */ 465 err = usbd_get_port_status(dev, port, &up->status); 466 if (err) { 467 DPRINTF(("uhub_explore: get port status failed, " 468 "error=%s\n", usbd_errstr(err))); 469 continue; 470 } 471 status = UGETW(up->status.wPortStatus); 472 change = UGETW(up->status.wPortChange); 473 if (!(status & UPS_CURRENT_CONNECT_STATUS)) { 474 /* Nothing connected, just ignore it. */ 475 #ifdef DIAGNOSTIC 476 printf("%s: port %d, device disappeared after reset\n", 477 USBDEVNAME(sc->sc_dev), port); 478 #endif 479 continue; 480 } 481 482 #if 0 483 if (UHUB_IS_HIGH_SPEED(sc) && !(status & UPS_HIGH_SPEED)) { 484 printf("%s: port %d, transaction translation not " 485 "implemented, low/full speed device ignored\n", 486 USBDEVNAME(sc->sc_dev), port); 487 continue; 488 } 489 #endif 490 491 /* Figure out device speed */ 492 if (status & UPS_HIGH_SPEED) 493 speed = USB_SPEED_HIGH; 494 else if (status & UPS_LOW_SPEED) 495 speed = USB_SPEED_LOW; 496 else 497 speed = USB_SPEED_FULL; 498 /* Get device info and set its address. */ 499 err = usbd_new_device(USBDEV(sc->sc_dev), dev->bus, 500 dev->depth + 1, speed, port, up); 501 /* XXX retry a few times? */ 502 if (err) { 503 DPRINTFN(-1,("uhub_explore: usb_new_device failed, " 504 "error=%s\n", usbd_errstr(err))); 505 /* Avoid addressing problems by disabling. */ 506 /* usbd_reset_port(dev, port, &up->status); */ 507 508 /* 509 * The unit refused to accept a new address, or had 510 * some other serious problem. Since we cannot leave 511 * at 0 we have to disable the port instead. 512 */ 513 printf("%s: device problem, disabling port %d\n", 514 USBDEVNAME(sc->sc_dev), port); 515 usbd_clear_port_feature(dev, port, UHF_PORT_ENABLE); 516 } else { 517 /* The port set up succeeded, reset error count. */ 518 up->restartcnt = 0; 519 520 if (up->device->hub) 521 up->device->hub->explore(up->device); 522 } 523 } 524 return (USBD_NORMAL_COMPLETION); 525 } 526 527 #if defined(__NetBSD__) || defined(__OpenBSD__) 528 int 529 uhub_activate(device_ptr_t self, enum devact act) 530 { 531 struct uhub_softc *sc = (struct uhub_softc *)self; 532 struct usbd_hub *hub = sc->sc_hub->hub; 533 usbd_device_handle dev; 534 int nports, port, i; 535 536 switch (act) { 537 case DVACT_ACTIVATE: 538 return (EOPNOTSUPP); 539 540 case DVACT_DEACTIVATE: 541 if (hub == NULL) /* malfunctioning hub */ 542 break; 543 nports = hub->hubdesc.bNbrPorts; 544 for(port = 0; port < nports; port++) { 545 dev = hub->ports[port].device; 546 if (dev != NULL && dev->subdevs != NULL) { 547 for (i = 0; dev->subdevs[i] != NULL; i++) 548 config_deactivate(dev->subdevs[i]); 549 } 550 } 551 break; 552 } 553 return (0); 554 } 555 #endif 556 557 /* 558 * Called from process context when the hub is gone. 559 * Detach all devices on active ports. 560 */ 561 USB_DETACH(uhub) 562 { 563 USB_DETACH_START(uhub, sc); 564 struct usbd_hub *hub = sc->sc_hub->hub; 565 struct usbd_port *rup; 566 int port, nports; 567 568 #if defined(__NetBSD__) || defined(__OpenBSD__) 569 DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags)); 570 #elif defined(__FreeBSD__) 571 DPRINTF(("uhub_detach: sc=%port\n", sc)); 572 #endif 573 574 if (hub == NULL) /* Must be partially working */ 575 return (0); 576 577 usbd_abort_pipe(sc->sc_ipipe); 578 usbd_close_pipe(sc->sc_ipipe); 579 580 nports = hub->hubdesc.bNbrPorts; 581 for(port = 0; port < nports; port++) { 582 rup = &hub->ports[port]; 583 if (rup->device) 584 usb_disconnect_port(rup, self); 585 } 586 587 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub, 588 USBDEV(sc->sc_dev)); 589 590 if (hub->ports[0].tt) 591 free(hub->ports[0].tt, M_USBDEV); 592 free(hub, M_USBDEV); 593 sc->sc_hub->hub = NULL; 594 595 return (0); 596 } 597 598 #if defined(__FreeBSD__) 599 /* Called when a device has been detached from it */ 600 Static void 601 uhub_child_detached(device_t self, device_t child) 602 { 603 struct uhub_softc *sc = device_get_softc(self); 604 usbd_device_handle devhub = sc->sc_hub; 605 usbd_device_handle dev; 606 int nports; 607 int port; 608 int i; 609 610 if (!devhub->hub) 611 /* should never happen; children are only created after init */ 612 panic("hub not fully initialised, but child deleted?"); 613 614 nports = devhub->hub->hubdesc.bNbrPorts; 615 for (port = 0; port < nports; port++) { 616 dev = devhub->hub->ports[port].device; 617 if (dev && dev->subdevs) { 618 for (i = 0; dev->subdevs[i]; i++) { 619 if (dev->subdevs[i] == child) { 620 dev->subdevs[i] = NULL; 621 return; 622 } 623 } 624 } 625 } 626 } 627 #endif 628 629 630 /* 631 * Hub interrupt. 632 * This an indication that some port has changed status. 633 * Notify the bus event handler thread that we need 634 * to be explored again. 635 */ 636 void 637 uhub_intr(usbd_xfer_handle xfer, usbd_private_handle addr, 638 usbd_status status) 639 { 640 struct uhub_softc *sc = addr; 641 642 DPRINTFN(5,("uhub_intr: sc=%p\n", sc)); 643 if (status == USBD_STALLED) 644 usbd_clear_endpoint_stall_async(sc->sc_ipipe); 645 else if (status == USBD_NORMAL_COMPLETION) 646 usb_needs_explore(sc->sc_hub); 647 } 648 649 #if defined(__FreeBSD__) 650 DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0); 651 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0); 652 #endif 653
Indexes created Wed Sep 24 05:09:52 GMT 2025