uhub.c revision 1.85.4.3
1 /* $NetBSD: uhub.c,v 1.85.4.3 2007/10/23 20:09:53 ad 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 1.85.4.3 2007/10/23 20:09:53 ad 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 <sys/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 int sc_proto; /* device protocol */ 81 usbd_pipe_handle sc_ipipe; /* interrupt pipe */ 82 83 /* XXX second buffer needed because we can't suspend pipes yet */ 84 u_int8_t *sc_statusbuf; 85 u_int8_t *sc_status; 86 size_t sc_statuslen; 87 int sc_explorepending; 88 89 u_char sc_running; 90 }; 91 92 #define UHUB_IS_HIGH_SPEED(sc) ((sc)->sc_proto != UDPROTO_FSHUB) 93 #define UHUB_IS_SINGLE_TT(sc) ((sc)->sc_proto == UDPROTO_HSHUBSTT) 94 95 #define PORTSTAT_ISSET(sc, port) \ 96 ((sc)->sc_status[(port) / 8] & (1 << ((port) % 8))) 97 98 Static usbd_status uhub_explore(usbd_device_handle hub); 99 Static void uhub_intr(usbd_xfer_handle, usbd_private_handle,usbd_status); 100 101 102 /* 103 * We need two attachment points: 104 * hub to usb and hub to hub 105 * Every other driver only connects to hubs 106 */ 107 108 #if defined(__NetBSD__) || defined(__OpenBSD__) 109 USB_DECLARE_DRIVER(uhub); 110 #elif defined(__FreeBSD__) 111 USB_DECLARE_DRIVER_INIT(uhub, 112 DEVMETHOD(bus_child_detached, uhub_child_detached)); 113 114 /* Create the driver instance for the hub connected to usb case. */ 115 devclass_t uhubroot_devclass; 116 117 Static device_method_t uhubroot_methods[] = { 118 DEVMETHOD(device_probe, uhub_match), 119 DEVMETHOD(device_attach, uhub_attach), 120 121 /* detach is not allowed for a root hub */ 122 {0,0} 123 }; 124 125 Static driver_t uhubroot_driver = { 126 "uhub", 127 uhubroot_methods, 128 sizeof(struct uhub_softc) 129 }; 130 #endif 131 132 USB_MATCH(uhub) 133 { 134 USB_MATCH_START(uhub, uaa); 135 136 DPRINTFN(5,("uhub_match, uaa=%p\n", uaa)); 137 /* 138 * The subclass for hubs seems to be 0 for some and 1 for others, 139 * so we just ignore the subclass. 140 */ 141 if (uaa->class == UDCLASS_HUB) 142 return (UMATCH_DEVCLASS_DEVSUBCLASS); 143 return (UMATCH_NONE); 144 } 145 146 USB_ATTACH(uhub) 147 { 148 USB_ATTACH_START(uhub, sc, uaa); 149 usbd_device_handle dev = uaa->device; 150 char *devinfop; 151 usbd_status err; 152 struct usbd_hub *hub = NULL; 153 usb_device_request_t req; 154 usb_hub_descriptor_t hubdesc; 155 int p, port, nports, nremov, pwrdly; 156 usbd_interface_handle iface; 157 usb_endpoint_descriptor_t *ed; 158 #if 0 /* notyet */ 159 struct usbd_tt *tts = NULL; 160 #endif 161 162 DPRINTFN(1,("uhub_attach\n")); 163 sc->sc_hub = dev; 164 sc->sc_proto = uaa->proto; 165 166 devinfop = usbd_devinfo_alloc(dev, 1); 167 USB_ATTACH_SETUP; 168 printf("%s: %s\n", USBDEVNAME(sc->sc_dev), devinfop); 169 usbd_devinfo_free(devinfop); 170 171 if (dev->depth > 0 && UHUB_IS_HIGH_SPEED(sc)) { 172 printf("%s: %s transaction translator%s\n", 173 USBDEVNAME(sc->sc_dev), 174 UHUB_IS_SINGLE_TT(sc) ? "single" : "multiple", 175 UHUB_IS_SINGLE_TT(sc) ? "" : "s"); 176 } 177 178 err = usbd_set_config_index(dev, 0, 1); 179 if (err) { 180 DPRINTF(("%s: configuration failed, error=%s\n", 181 USBDEVNAME(sc->sc_dev), usbd_errstr(err))); 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 USB_ATTACH_ERROR_RETURN; 189 } 190 191 /* Get hub descriptor. */ 192 req.bmRequestType = UT_READ_CLASS_DEVICE; 193 req.bRequest = UR_GET_DESCRIPTOR; 194 USETW2(req.wValue, UDESC_HUB, 0); 195 USETW(req.wIndex, 0); 196 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE); 197 DPRINTFN(1,("usb_init_hub: getting hub descriptor\n")); 198 err = usbd_do_request(dev, &req, &hubdesc); 199 nports = hubdesc.bNbrPorts; 200 if (!err && nports > 7) { 201 USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8); 202 err = usbd_do_request(dev, &req, &hubdesc); 203 } 204 if (err) { 205 DPRINTF(("%s: getting hub descriptor failed, error=%s\n", 206 USBDEVNAME(sc->sc_dev), usbd_errstr(err))); 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 if (nports == 0) { 218 printf("%s: no ports, hub ignored\n", USBDEVNAME(sc->sc_dev)); 219 goto bad; 220 } 221 222 hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port), 223 M_USBDEV, M_NOWAIT); 224 if (hub == NULL) 225 USB_ATTACH_ERROR_RETURN; 226 dev->hub = hub; 227 dev->hub->hubsoftc = sc; 228 hub->explore = uhub_explore; 229 hub->hubdesc = hubdesc; 230 231 /* Set up interrupt pipe. */ 232 err = usbd_device2interface_handle(dev, 0, &iface); 233 if (err) { 234 printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev)); 235 goto bad; 236 } 237 238 if (UHUB_IS_HIGH_SPEED(sc) && !UHUB_IS_SINGLE_TT(sc)) { 239 err = usbd_set_interface(iface, 1); 240 if (err) 241 printf("%s: can't enable multiple TTs\n", 242 USBDEVNAME(sc->sc_dev)); 243 } 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 sc->sc_statuslen = (nports + 1 + 7) / 8; 256 sc->sc_statusbuf = malloc(sc->sc_statuslen, M_USBDEV, M_NOWAIT); 257 if (!sc->sc_statusbuf) 258 goto bad; 259 sc->sc_status = malloc(sc->sc_statuslen, M_USBDEV, M_NOWAIT); 260 if (!sc->sc_status) 261 goto bad; 262 263 /* force initial scan */ 264 memset(sc->sc_status, 0xff, sc->sc_statuslen); 265 sc->sc_explorepending = 1; 266 267 err = usbd_open_pipe_intr(iface, ed->bEndpointAddress, 268 USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_statusbuf, 269 sc->sc_statuslen, uhub_intr, USBD_DEFAULT_INTERVAL); 270 if (err) { 271 printf("%s: cannot open interrupt pipe\n", 272 USBDEVNAME(sc->sc_dev)); 273 goto bad; 274 } 275 276 /* Wait with power off for a while. */ 277 usbd_delay_ms(dev, USB_POWER_DOWN_TIME); 278 279 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, dev, USBDEV(sc->sc_dev)); 280 281 /* 282 * To have the best chance of success we do things in the exact same 283 * order as Windoze98. This should not be necessary, but some 284 * devices do not follow the USB specs to the letter. 285 * 286 * These are the events on the bus when a hub is attached: 287 * Get device and config descriptors (see attach code) 288 * Get hub descriptor (see above) 289 * For all ports 290 * turn on power 291 * wait for power to become stable 292 * (all below happens in explore code) 293 * For all ports 294 * clear C_PORT_CONNECTION 295 * For all ports 296 * get port status 297 * if device connected 298 * wait 100 ms 299 * turn on reset 300 * wait 301 * clear C_PORT_RESET 302 * get port status 303 * proceed with device attachment 304 */ 305 306 #if 0 307 if (UHUB_IS_HIGH_SPEED(sc) && nports > 0) { 308 tts = malloc((UHUB_IS_SINGLE_TT(sc) ? 1 : nports) * 309 sizeof (struct usbd_tt), M_USBDEV, M_NOWAIT); 310 if (!tts) 311 goto bad; 312 } 313 #endif 314 /* Set up data structures */ 315 for (p = 0; p < nports; p++) { 316 struct usbd_port *up = &hub->ports[p]; 317 up->device = NULL; 318 up->parent = dev; 319 up->portno = p+1; 320 if (dev->self_powered) 321 /* Self powered hub, give ports maximum current. */ 322 up->power = USB_MAX_POWER; 323 else 324 up->power = USB_MIN_POWER; 325 up->restartcnt = 0; 326 up->reattach = 0; 327 #if 0 328 if (UHUB_IS_HIGH_SPEED(sc)) { 329 up->tt = &tts[UHUB_IS_SINGLE_TT(sc) ? 0 : p]; 330 up->tt->hub = hub; 331 } else { 332 up->tt = NULL; 333 } 334 #endif 335 } 336 337 /* XXX should check for none, individual, or ganged power? */ 338 339 pwrdly = dev->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR 340 + USB_EXTRA_POWER_UP_TIME; 341 for (port = 1; port <= nports; port++) { 342 /* Turn the power on. */ 343 err = usbd_set_port_feature(dev, port, UHF_PORT_POWER); 344 if (err) 345 printf("%s: port %d power on failed, %s\n", 346 USBDEVNAME(sc->sc_dev), port, 347 usbd_errstr(err)); 348 DPRINTF(("usb_init_port: turn on port %d power\n", port)); 349 /* Wait for stable power. */ 350 usbd_delay_ms(dev, pwrdly); 351 } 352 353 /* The usual exploration will finish the setup. */ 354 355 sc->sc_running = 1; 356 357 USB_ATTACH_SUCCESS_RETURN; 358 359 bad: 360 if (sc->sc_status) 361 free(sc->sc_status, M_USBDEV); 362 if (hub) 363 free(hub, M_USBDEV); 364 dev->hub = NULL; 365 USB_ATTACH_ERROR_RETURN; 366 } 367 368 usbd_status 369 uhub_explore(usbd_device_handle dev) 370 { 371 usb_hub_descriptor_t *hd = &dev->hub->hubdesc; 372 struct uhub_softc *sc = dev->hub->hubsoftc; 373 struct usbd_port *up; 374 usbd_status err; 375 int speed; 376 int port; 377 int change, status, reconnect; 378 379 DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address)); 380 381 if (!sc->sc_running) 382 return (USBD_NOT_STARTED); 383 384 /* Ignore hubs that are too deep. */ 385 if (dev->depth > USB_HUB_MAX_DEPTH) 386 return (USBD_TOO_DEEP); 387 388 for (port = 1; port <= hd->bNbrPorts; port++) { 389 up = &dev->hub->ports[port-1]; 390 391 /* reattach is needed after firmware upload */ 392 reconnect = up->reattach; 393 up->reattach = 0; 394 395 status = change = 0; 396 397 /* don't check if no change summary notification */ 398 if (PORTSTAT_ISSET(sc, port) || reconnect) { 399 err = usbd_get_port_status(dev, port, &up->status); 400 if (err) { 401 DPRINTF(("uhub_explore: get port stat failed, " 402 "error=%s\n", usbd_errstr(err))); 403 continue; 404 } 405 status = UGETW(up->status.wPortStatus); 406 change = UGETW(up->status.wPortChange); 407 } 408 if (!change && !reconnect) { 409 /* No status change, just do recursive explore. */ 410 if (up->device != NULL && up->device->hub != NULL) 411 up->device->hub->explore(up->device); 412 continue; 413 } 414 415 if (change & UPS_C_PORT_ENABLED) { 416 DPRINTF(("uhub_explore: C_PORT_ENABLED\n")); 417 usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE); 418 if (change & UPS_C_CONNECT_STATUS) { 419 /* Ignore the port error if the device 420 vanished. */ 421 } else if (status & UPS_PORT_ENABLED) { 422 printf("%s: illegal enable change, port %d\n", 423 USBDEVNAME(sc->sc_dev), port); 424 } else { 425 /* Port error condition. */ 426 if (up->restartcnt) /* no message first time */ 427 printf("%s: port error, restarting " 428 "port %d\n", 429 USBDEVNAME(sc->sc_dev), port); 430 431 if (up->restartcnt++ < USBD_RESTART_MAX) 432 goto disco; 433 else 434 printf("%s: port error, giving up " 435 "port %d\n", 436 USBDEVNAME(sc->sc_dev), port); 437 } 438 } 439 440 /* XXX handle overcurrent and resume events! */ 441 442 if (!(change & UPS_C_CONNECT_STATUS)) 443 continue; 444 445 /* We have a connect status change, handle it. */ 446 447 DPRINTF(("uhub_explore: status change hub=%d port=%d\n", 448 dev->address, port)); 449 usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION); 450 /* 451 * If there is already a device on the port the change status 452 * must mean that is has disconnected. Looking at the 453 * current connect status is not enough to figure this out 454 * since a new unit may have been connected before we handle 455 * the disconnect. 456 */ 457 disco: 458 if (up->device != NULL) { 459 /* Disconnected */ 460 DPRINTF(("uhub_explore: device addr=%d disappeared " 461 "on port %d\n", up->device->address, port)); 462 usb_disconnect_port(up, USBDEV(sc->sc_dev)); 463 usbd_clear_port_feature(dev, port, 464 UHF_C_PORT_CONNECTION); 465 } 466 if (!(status & UPS_CURRENT_CONNECT_STATUS)) { 467 /* Nothing connected, just ignore it. */ 468 DPRINTFN(3,("uhub_explore: port=%d !CURRENT_CONNECT" 469 "_STATUS\n", port)); 470 continue; 471 } 472 473 /* Connected */ 474 475 if (!(status & UPS_PORT_POWER)) 476 printf("%s: strange, connected port %d has no power\n", 477 USBDEVNAME(sc->sc_dev), port); 478 479 /* Wait for maximum device power up time. */ 480 usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY); 481 482 /* Reset port, which implies enabling it. */ 483 if (usbd_reset_port(dev, port, &up->status)) { 484 printf("%s: port %d reset failed\n", 485 USBDEVNAME(sc->sc_dev), port); 486 continue; 487 } 488 /* Get port status again, it might have changed during reset */ 489 err = usbd_get_port_status(dev, port, &up->status); 490 if (err) { 491 DPRINTF(("uhub_explore: get port status failed, " 492 "error=%s\n", usbd_errstr(err))); 493 continue; 494 } 495 status = UGETW(up->status.wPortStatus); 496 change = UGETW(up->status.wPortChange); 497 if (!(status & UPS_CURRENT_CONNECT_STATUS)) { 498 /* Nothing connected, just ignore it. */ 499 #ifdef DIAGNOSTIC 500 printf("%s: port %d, device disappeared after reset\n", 501 USBDEVNAME(sc->sc_dev), port); 502 #endif 503 continue; 504 } 505 506 /* Figure out device speed */ 507 if (status & UPS_HIGH_SPEED) 508 speed = USB_SPEED_HIGH; 509 else if (status & UPS_LOW_SPEED) 510 speed = USB_SPEED_LOW; 511 else 512 speed = USB_SPEED_FULL; 513 /* Get device info and set its address. */ 514 err = usbd_new_device(USBDEV(sc->sc_dev), dev->bus, 515 dev->depth + 1, speed, port, up); 516 /* XXX retry a few times? */ 517 if (err) { 518 DPRINTFN(-1,("uhub_explore: usb_new_device failed, " 519 "error=%s\n", usbd_errstr(err))); 520 /* Avoid addressing problems by disabling. */ 521 /* usbd_reset_port(dev, port, &up->status); */ 522 523 /* 524 * The unit refused to accept a new address, or had 525 * some other serious problem. Since we cannot leave 526 * at 0 we have to disable the port instead. 527 */ 528 printf("%s: device problem, disabling port %d\n", 529 USBDEVNAME(sc->sc_dev), port); 530 usbd_clear_port_feature(dev, port, UHF_PORT_ENABLE); 531 } else { 532 /* The port set up succeeded, reset error count. */ 533 up->restartcnt = 0; 534 535 if (up->device->hub) 536 up->device->hub->explore(up->device); 537 } 538 } 539 /* enable status change notifications again */ 540 sc->sc_explorepending = 0; 541 return (USBD_NORMAL_COMPLETION); 542 } 543 544 #if defined(__NetBSD__) || defined(__OpenBSD__) 545 int 546 uhub_activate(device_ptr_t self, enum devact act) 547 { 548 struct uhub_softc *sc = (struct uhub_softc *)self; 549 struct usbd_hub *hub = sc->sc_hub->hub; 550 usbd_device_handle dev; 551 int nports, port, i; 552 553 switch (act) { 554 case DVACT_ACTIVATE: 555 return (EOPNOTSUPP); 556 557 case DVACT_DEACTIVATE: 558 if (hub == NULL) /* malfunctioning hub */ 559 break; 560 nports = hub->hubdesc.bNbrPorts; 561 for(port = 0; port < nports; port++) { 562 dev = hub->ports[port].device; 563 if (dev != NULL && dev->subdevs != NULL) { 564 for (i = 0; dev->subdevs[i] != NULL; i++) 565 config_deactivate(dev->subdevs[i]); 566 } 567 } 568 break; 569 } 570 return (0); 571 } 572 #endif 573 574 /* 575 * Called from process context when the hub is gone. 576 * Detach all devices on active ports. 577 */ 578 USB_DETACH(uhub) 579 { 580 USB_DETACH_START(uhub, sc); 581 struct usbd_hub *hub = sc->sc_hub->hub; 582 struct usbd_port *rup; 583 int port, nports; 584 585 #if defined(__NetBSD__) || defined(__OpenBSD__) 586 DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags)); 587 #elif defined(__FreeBSD__) 588 DPRINTF(("uhub_detach: sc=%port\n", sc)); 589 #endif 590 591 if (hub == NULL) /* Must be partially working */ 592 return (0); 593 594 usbd_abort_pipe(sc->sc_ipipe); 595 usbd_close_pipe(sc->sc_ipipe); 596 597 nports = hub->hubdesc.bNbrPorts; 598 for(port = 0; port < nports; port++) { 599 rup = &hub->ports[port]; 600 if (rup->device) 601 usb_disconnect_port(rup, self); 602 } 603 604 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_hub, 605 USBDEV(sc->sc_dev)); 606 607 #if 0 608 if (hub->ports[0].tt) 609 free(hub->ports[0].tt, M_USBDEV); 610 #endif 611 free(hub, M_USBDEV); 612 sc->sc_hub->hub = NULL; 613 if (sc->sc_status) 614 free(sc->sc_status, M_USBDEV); 615 616 return (0); 617 } 618 619 #if defined(__FreeBSD__) 620 /* Called when a device has been detached from it */ 621 Static void 622 uhub_child_detached(device_t self, device_t child) 623 { 624 struct uhub_softc *sc = device_get_softc(self); 625 usbd_device_handle devhub = sc->sc_hub; 626 usbd_device_handle dev; 627 int nports; 628 int port; 629 int i; 630 631 if (!devhub->hub) 632 /* should never happen; children are only created after init */ 633 panic("hub not fully initialised, but child deleted?"); 634 635 nports = devhub->hub->hubdesc.bNbrPorts; 636 for (port = 0; port < nports; port++) { 637 dev = devhub->hub->ports[port].device; 638 if (dev && dev->subdevs) { 639 for (i = 0; dev->subdevs[i]; i++) { 640 if (dev->subdevs[i] == child) { 641 dev->subdevs[i] = NULL; 642 return; 643 } 644 } 645 } 646 } 647 } 648 #endif 649 650 651 /* 652 * Hub interrupt. 653 * This an indication that some port has changed status. 654 * Notify the bus event handler thread that we need 655 * to be explored again. 656 */ 657 void 658 uhub_intr(usbd_xfer_handle xfer, usbd_private_handle addr, 659 usbd_status status) 660 { 661 struct uhub_softc *sc = addr; 662 663 DPRINTFN(5,("uhub_intr: sc=%p\n", sc)); 664 665 if (status == USBD_STALLED) 666 usbd_clear_endpoint_stall_async(sc->sc_ipipe); 667 else if (status == USBD_NORMAL_COMPLETION && 668 !sc->sc_explorepending) { 669 /* 670 * Make sure the status is not overwritten in between. 671 * XXX we should suspend the pipe instead 672 */ 673 memcpy(sc->sc_status, sc->sc_statusbuf, sc->sc_statuslen); 674 sc->sc_explorepending = 1; 675 usb_needs_explore(sc->sc_hub); 676 } 677 /* 678 * XXX workaround for broken implementation of the interrupt 679 * pipe in EHCI root hub emulation which doesn't resend 680 * status change notifications until handled: force a rescan 681 * of the ports we touched in the last run 682 */ 683 if (status == USBD_NORMAL_COMPLETION && sc->sc_explorepending && 684 !strcmp(sc->sc_dev.dv_parent->dv_parent->dv_cfdriver->cd_name, "ehci")) 685 usb_needs_explore(sc->sc_hub); 686 } 687 688 #if defined(__FreeBSD__) 689 DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0); 690 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0); 691 #endif 692
Indexes created Tue Sep 23 23:09:58 GMT 2025