sys/dev/usb/controller/usb_controller.c

   1 /* $FreeBSD$ */
   2 /*-
   3  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include "opt_ddb.h"
  28
  29 #include <sys/stdint.h>
  30 #include <sys/stddef.h>
  31 #include <sys/param.h>
  32 #include <sys/queue.h>
  33 #include <sys/types.h>
  34 #include <sys/systm.h>
  35 #include <sys/kernel.h>
  36 #include <sys/bus.h>
  37 #include <sys/module.h>
  38 #include <sys/lock.h>
  39 #include <sys/mutex.h>
  40 #include <sys/condvar.h>
  41 #include <sys/sysctl.h>
  42 #include <sys/sx.h>
  43 #include <sys/unistd.h>
  44 #include <sys/callout.h>
  45 #include <sys/malloc.h>
  46 #include <sys/priv.h>
  47
  48 #include <dev/usb/usb.h>
  49 #include <dev/usb/usbdi.h>
  50
  51 #define USB_DEBUG_VAR usb_ctrl_debug
  52
  53 #include <dev/usb/usb_core.h>
  54 #include <dev/usb/usb_debug.h>
  55 #include <dev/usb/usb_process.h>
  56 #include <dev/usb/usb_busdma.h>
  57 #include <dev/usb/usb_dynamic.h>
  58 #include <dev/usb/usb_device.h>
  59 #include <dev/usb/usb_hub.h>
  60
  61 #include <dev/usb/usb_controller.h>
  62 #include <dev/usb/usb_bus.h>
  63 #include <dev/usb/usb_pf.h>
  64 #include "usb_if.h"
  65
  66 /* function prototypes  */
  67
  68 static device_probe_t usb_probe;
  69 static device_attach_t usb_attach;
  70 static device_detach_t usb_detach;
  71 static device_suspend_t usb_suspend;
  72 static device_resume_t usb_resume;
  73 static device_shutdown_t usb_shutdown;
  74
  75 static void     usb_attach_sub(device_t, struct usb_bus *);
  76
  77 /* static variables */
  78
  79 #ifdef USB_DEBUG
  80 static int usb_ctrl_debug = 0;
  81
  82 SYSCTL_NODE(_hw_usb, OID_AUTO, ctrl, CTLFLAG_RW, 0, "USB controller");
  83 SYSCTL_INT(_hw_usb_ctrl, OID_AUTO, debug, CTLFLAG_RW, &usb_ctrl_debug, 0,
  84     "Debug level");
  85 #endif
  86
  87 static int usb_no_boot_wait = 0;
  88 TUNABLE_INT("hw.usb.no_boot_wait", &usb_no_boot_wait);
  89 SYSCTL_INT(_hw_usb, OID_AUTO, no_boot_wait, CTLFLAG_RD|CTLFLAG_TUN, &usb_no_boot_wait, 0,
  90     "No USB device enumerate waiting at boot.");
  91
  92 static int usb_no_suspend_wait = 0;
  93 TUNABLE_INT("hw.usb.no_suspend_wait", &usb_no_suspend_wait);
  94 SYSCTL_INT(_hw_usb, OID_AUTO, no_suspend_wait, CTLFLAG_RW|CTLFLAG_TUN,
  95     &usb_no_suspend_wait, 0, "No USB device waiting at system suspend.");
  96
  97 static int usb_no_shutdown_wait = 0;
  98 TUNABLE_INT("hw.usb.no_shutdown_wait", &usb_no_shutdown_wait);
  99 SYSCTL_INT(_hw_usb, OID_AUTO, no_shutdown_wait, CTLFLAG_RW|CTLFLAG_TUN,
 100     &usb_no_shutdown_wait, 0, "No USB device waiting at system shutdown.");
 101
 102 static devclass_t usb_devclass;
 103
 104 static device_method_t usb_methods[] = {
 105         DEVMETHOD(device_probe, usb_probe),
 106         DEVMETHOD(device_attach, usb_attach),
 107         DEVMETHOD(device_detach, usb_detach),
 108         DEVMETHOD(device_suspend, usb_suspend),
 109         DEVMETHOD(device_resume, usb_resume),
 110         DEVMETHOD(device_shutdown, usb_shutdown),
 111         {0, 0}
 112 };
 113
 114 static driver_t usb_driver = {
 115         .name = "usbus",
 116         .methods = usb_methods,
 117         .size = 0,
 118 };
 119
 120 /* Host Only Drivers */
 121 DRIVER_MODULE(usbus, ohci, usb_driver, usb_devclass, 0, 0);
 122 DRIVER_MODULE(usbus, uhci, usb_driver, usb_devclass, 0, 0);
 123 DRIVER_MODULE(usbus, ehci, usb_driver, usb_devclass, 0, 0);
 124 DRIVER_MODULE(usbus, xhci, usb_driver, usb_devclass, 0, 0);
 125
 126 /* Device Only Drivers */
 127 DRIVER_MODULE(usbus, at91_udp, usb_driver, usb_devclass, 0, 0);
 128 DRIVER_MODULE(usbus, musbotg, usb_driver, usb_devclass, 0, 0);
 129 DRIVER_MODULE(usbus, uss820, usb_driver, usb_devclass, 0, 0);
 130
 131 /*------------------------------------------------------------------------*
 132  *      usb_probe
 133  *
 134  * This function is called from "{ehci,ohci,uhci}_pci_attach()".
 135  *------------------------------------------------------------------------*/
 136 static int
 137 usb_probe(device_t dev)
 138 {
 139         DPRINTF("\n");
 140         return (0);
 141 }
 142
 143 static void
 144 usb_root_mount_rel(struct usb_bus *bus)
 145 {
 146         if (bus->bus_roothold != NULL) {
 147                 DPRINTF("Releasing root mount hold %p\n", bus->bus_roothold);
 148                 root_mount_rel(bus->bus_roothold);
 149                 bus->bus_roothold = NULL;
 150         }
 151 }
 152
 153 /*------------------------------------------------------------------------*
 154  *      usb_attach
 155  *------------------------------------------------------------------------*/
 156 static int
 157 usb_attach(device_t dev)
 158 {
 159         struct usb_bus *bus = device_get_ivars(dev);
 160
 161         DPRINTF("\n");
 162
 163         if (bus == NULL) {
 164                 device_printf(dev, "USB device has no ivars\n");
 165                 return (ENXIO);
 166         }
 167
 168         if (usb_no_boot_wait == 0) {
 169                 /* delay vfs_mountroot until the bus is explored */
 170                 bus->bus_roothold = root_mount_hold(device_get_nameunit(dev));
 171         }
 172
 173         usb_attach_sub(dev, bus);
 174
 175         return (0);                     /* return success */
 176 }
 177
 178 /*------------------------------------------------------------------------*
 179  *      usb_detach
 180  *------------------------------------------------------------------------*/
 181 static int
 182 usb_detach(device_t dev)
 183 {
 184         struct usb_bus *bus = device_get_softc(dev);
 185
 186         DPRINTF("\n");
 187
 188         if (bus == NULL) {
 189                 /* was never setup properly */
 190                 return (0);
 191         }
 192         /* Stop power watchdog */
 193         usb_callout_drain(&bus->power_wdog);
 194
 195         /* Let the USB explore process detach all devices. */
 196         usb_root_mount_rel(bus);
 197
 198         USB_BUS_LOCK(bus);
 199
 200         /* Queue detach job */
 201         usb_proc_msignal(&bus->explore_proc,
 202             &bus->detach_msg[0], &bus->detach_msg[1]);
 203
 204         /* Wait for detach to complete */
 205         usb_proc_mwait(&bus->explore_proc,
 206             &bus->detach_msg[0], &bus->detach_msg[1]);
 207
 208         USB_BUS_UNLOCK(bus);
 209
 210         /* Get rid of USB callback processes */
 211
 212         usb_proc_free(&bus->giant_callback_proc);
 213         usb_proc_free(&bus->non_giant_callback_proc);
 214
 215         /* Get rid of USB explore process */
 216
 217         usb_proc_free(&bus->explore_proc);
 218
 219         /* Get rid of control transfer process */
 220
 221         usb_proc_free(&bus->control_xfer_proc);
 222
 223 #if USB_HAVE_PF
 224         usbpf_detach(bus);
 225 #endif
 226         return (0);
 227 }
 228
 229 /*------------------------------------------------------------------------*
 230  *      usb_suspend
 231  *------------------------------------------------------------------------*/
 232 static int
 233 usb_suspend(device_t dev)
 234 {
 235         struct usb_bus *bus = device_get_softc(dev);
 236
 237         DPRINTF("\n");
 238
 239         if (bus == NULL) {
 240                 /* was never setup properly */
 241                 return (0);
 242         }
 243
 244         USB_BUS_LOCK(bus);
 245         usb_proc_msignal(&bus->explore_proc,
 246             &bus->suspend_msg[0], &bus->suspend_msg[1]);
 247         if (usb_no_suspend_wait == 0) {
 248                 /* wait for suspend callback to be executed */
 249                 usb_proc_mwait(&bus->explore_proc,
 250                     &bus->suspend_msg[0], &bus->suspend_msg[1]);
 251         }
 252         USB_BUS_UNLOCK(bus);
 253
 254         return (0);
 255 }
 256
 257 /*------------------------------------------------------------------------*
 258  *      usb_resume
 259  *------------------------------------------------------------------------*/
 260 static int
 261 usb_resume(device_t dev)
 262 {
 263         struct usb_bus *bus = device_get_softc(dev);
 264
 265         DPRINTF("\n");
 266
 267         if (bus == NULL) {
 268                 /* was never setup properly */
 269                 return (0);
 270         }
 271
 272         USB_BUS_LOCK(bus);
 273         usb_proc_msignal(&bus->explore_proc,
 274             &bus->resume_msg[0], &bus->resume_msg[1]);
 275         USB_BUS_UNLOCK(bus);
 276
 277         return (0);
 278 }
 279
 280 /*------------------------------------------------------------------------*
 281  *      usb_shutdown
 282  *------------------------------------------------------------------------*/
 283 static int
 284 usb_shutdown(device_t dev)
 285 {
 286         struct usb_bus *bus = device_get_softc(dev);
 287
 288         DPRINTF("\n");
 289
 290         if (bus == NULL) {
 291                 /* was never setup properly */
 292                 return (0);
 293         }
 294
 295         device_printf(bus->bdev, "Controller shutdown\n");
 296
 297         USB_BUS_LOCK(bus);
 298         usb_proc_msignal(&bus->explore_proc,
 299             &bus->shutdown_msg[0], &bus->shutdown_msg[1]);
 300         if (usb_no_shutdown_wait == 0) {
 301                 /* wait for shutdown callback to be executed */
 302                 usb_proc_mwait(&bus->explore_proc,
 303                     &bus->shutdown_msg[0], &bus->shutdown_msg[1]);
 304         }
 305         USB_BUS_UNLOCK(bus);
 306
 307         device_printf(bus->bdev, "Controller shutdown complete\n");
 308
 309         return (0);
 310 }
 311
 312 /*------------------------------------------------------------------------*
 313  *      usb_bus_explore
 314  *
 315  * This function is used to explore the device tree from the root.
 316  *------------------------------------------------------------------------*/
 317 static void
 318 usb_bus_explore(struct usb_proc_msg *pm)
 319 {
 320         struct usb_bus *bus;
 321         struct usb_device *udev;
 322
 323         bus = ((struct usb_bus_msg *)pm)->bus;
 324         udev = bus->devices[USB_ROOT_HUB_ADDR];
 325
 326         if (bus->no_explore != 0)
 327                 return;
 328
 329         if (udev && udev->hub) {
 330
 331                 if (bus->do_probe) {
 332                         bus->do_probe = 0;
 333                         bus->driver_added_refcount++;
 334                 }
 335                 if (bus->driver_added_refcount == 0) {
 336                         /* avoid zero, hence that is memory default */
 337                         bus->driver_added_refcount = 1;
 338                 }
 339
 340 #ifdef DDB
 341                 /*
 342                  * The following three lines of code are only here to
 343                  * recover from DDB:
 344                  */
 345                 usb_proc_rewakeup(&bus->control_xfer_proc);
 346                 usb_proc_rewakeup(&bus->giant_callback_proc);
 347                 usb_proc_rewakeup(&bus->non_giant_callback_proc);
 348 #endif
 349
 350                 USB_BUS_UNLOCK(bus);
 351
 352 #if USB_HAVE_POWERD
 353                 /*
 354                  * First update the USB power state!
 355                  */
 356                 usb_bus_powerd(bus);
 357 #endif
 358                  /* Explore the Root USB HUB. */
 359                 (udev->hub->explore) (udev);
 360                 USB_BUS_LOCK(bus);
 361         }
 362         usb_root_mount_rel(bus);
 363 }
 364
 365 /*------------------------------------------------------------------------*
 366  *      usb_bus_detach
 367  *
 368  * This function is used to detach the device tree from the root.
 369  *------------------------------------------------------------------------*/
 370 static void
 371 usb_bus_detach(struct usb_proc_msg *pm)
 372 {
 373         struct usb_bus *bus;
 374         struct usb_device *udev;
 375         device_t dev;
 376
 377         bus = ((struct usb_bus_msg *)pm)->bus;
 378         udev = bus->devices[USB_ROOT_HUB_ADDR];
 379         dev = bus->bdev;
 380         /* clear the softc */
 381         device_set_softc(dev, NULL);
 382         USB_BUS_UNLOCK(bus);
 383
 384         /* detach children first */
 385         mtx_lock(&Giant);
 386         bus_generic_detach(dev);
 387         mtx_unlock(&Giant);
 388
 389         /*
 390          * Free USB device and all subdevices, if any.
 391          */
 392         usb_free_device(udev, 0);
 393
 394         USB_BUS_LOCK(bus);
 395         /* clear bdev variable last */
 396         bus->bdev = NULL;
 397 }
 398
 399 /*------------------------------------------------------------------------*
 400  *      usb_bus_suspend
 401  *
 402  * This function is used to suspend the USB contoller.
 403  *------------------------------------------------------------------------*/
 404 static void
 405 usb_bus_suspend(struct usb_proc_msg *pm)
 406 {
 407         struct usb_bus *bus;
 408         struct usb_device *udev;
 409         usb_error_t err;
 410
 411         bus = ((struct usb_bus_msg *)pm)->bus;
 412         udev = bus->devices[USB_ROOT_HUB_ADDR];
 413
 414         if (udev == NULL || bus->bdev == NULL)
 415                 return;
 416
 417         USB_BUS_UNLOCK(bus);
 418
 419         /*
 420          * We use the shutdown event here because the suspend and
 421          * resume events are reserved for the USB port suspend and
 422          * resume. The USB system suspend is implemented like full
 423          * shutdown and all connected USB devices will be disconnected
 424          * subsequently. At resume all USB devices will be
 425          * re-connected again.
 426          */
 427
 428         bus_generic_shutdown(bus->bdev);
 429
 430         usbd_enum_lock(udev);
 431
 432         err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX);
 433         if (err)
 434                 device_printf(bus->bdev, "Could not unconfigure root HUB\n");
 435
 436         USB_BUS_LOCK(bus);
 437         bus->hw_power_state = 0;
 438         bus->no_explore = 1;
 439         USB_BUS_UNLOCK(bus);
 440
 441         if (bus->methods->set_hw_power != NULL)
 442                 (bus->methods->set_hw_power) (bus);
 443
 444         if (bus->methods->set_hw_power_sleep != NULL)
 445                 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SUSPEND);
 446
 447         usbd_enum_unlock(udev);
 448
 449         USB_BUS_LOCK(bus);
 450 }
 451
 452 /*------------------------------------------------------------------------*
 453  *      usb_bus_resume
 454  *
 455  * This function is used to resume the USB contoller.
 456  *------------------------------------------------------------------------*/
 457 static void
 458 usb_bus_resume(struct usb_proc_msg *pm)
 459 {
 460         struct usb_bus *bus;
 461         struct usb_device *udev;
 462         usb_error_t err;
 463
 464         bus = ((struct usb_bus_msg *)pm)->bus;
 465         udev = bus->devices[USB_ROOT_HUB_ADDR];
 466
 467         if (udev == NULL || bus->bdev == NULL)
 468                 return;
 469
 470         USB_BUS_UNLOCK(bus);
 471
 472         usbd_enum_lock(udev);
 473 #if 0
 474         DEVMETHOD(usb_take_controller, NULL);   /* dummy */
 475 #endif
 476         USB_TAKE_CONTROLLER(device_get_parent(bus->bdev));
 477
 478         USB_BUS_LOCK(bus);
 479         bus->hw_power_state =
 480           USB_HW_POWER_CONTROL |
 481           USB_HW_POWER_BULK |
 482           USB_HW_POWER_INTERRUPT |
 483           USB_HW_POWER_ISOC |
 484           USB_HW_POWER_NON_ROOT_HUB;
 485         bus->no_explore = 0;
 486         USB_BUS_UNLOCK(bus);
 487
 488         if (bus->methods->set_hw_power_sleep != NULL)
 489                 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_RESUME);
 490
 491         if (bus->methods->set_hw_power != NULL)
 492                 (bus->methods->set_hw_power) (bus);
 493
 494         /* restore USB configuration to index 0 */
 495         err = usbd_set_config_index(udev, 0);
 496         if (err)
 497                 device_printf(bus->bdev, "Could not configure root HUB\n");
 498
 499         /* probe and attach */
 500         err = usb_probe_and_attach(udev, USB_IFACE_INDEX_ANY);
 501         if (err) {
 502                 device_printf(bus->bdev, "Could not probe and "
 503                     "attach root HUB\n");
 504         }
 505
 506         usbd_enum_unlock(udev);
 507
 508         USB_BUS_LOCK(bus);
 509 }
 510
 511 /*------------------------------------------------------------------------*
 512  *      usb_bus_shutdown
 513  *
 514  * This function is used to shutdown the USB contoller.
 515  *------------------------------------------------------------------------*/
 516 static void
 517 usb_bus_shutdown(struct usb_proc_msg *pm)
 518 {
 519         struct usb_bus *bus;
 520         struct usb_device *udev;
 521         usb_error_t err;
 522
 523         bus = ((struct usb_bus_msg *)pm)->bus;
 524         udev = bus->devices[USB_ROOT_HUB_ADDR];
 525
 526         if (udev == NULL || bus->bdev == NULL)
 527                 return;
 528
 529         USB_BUS_UNLOCK(bus);
 530
 531         bus_generic_shutdown(bus->bdev);
 532
 533         usbd_enum_lock(udev);
 534
 535         err = usbd_set_config_index(udev, USB_UNCONFIG_INDEX);
 536         if (err)
 537                 device_printf(bus->bdev, "Could not unconfigure root HUB\n");
 538
 539         USB_BUS_LOCK(bus);
 540         bus->hw_power_state = 0;
 541         bus->no_explore = 1;
 542         USB_BUS_UNLOCK(bus);
 543
 544         if (bus->methods->set_hw_power != NULL)
 545                 (bus->methods->set_hw_power) (bus);
 546
 547         if (bus->methods->set_hw_power_sleep != NULL)
 548                 (bus->methods->set_hw_power_sleep) (bus, USB_HW_POWER_SHUTDOWN);
 549
 550         usbd_enum_unlock(udev);
 551
 552         USB_BUS_LOCK(bus);
 553 }
 554
 555 static void
 556 usb_power_wdog(void *arg)
 557 {
 558         struct usb_bus *bus = arg;
 559
 560         USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
 561
 562         usb_callout_reset(&bus->power_wdog,
 563             4 * hz, usb_power_wdog, arg);
 564
 565 #ifdef DDB
 566         /*
 567          * The following line of code is only here to recover from
 568          * DDB:
 569          */
 570         usb_proc_rewakeup(&bus->explore_proc);  /* recover from DDB */
 571 #endif
 572
 573 #if USB_HAVE_POWERD
 574         USB_BUS_UNLOCK(bus);
 575
 576         usb_bus_power_update(bus);
 577
 578         USB_BUS_LOCK(bus);
 579 #endif
 580 }
 581
 582 /*------------------------------------------------------------------------*
 583  *      usb_bus_attach
 584  *
 585  * This function attaches USB in context of the explore thread.
 586  *------------------------------------------------------------------------*/
 587 static void
 588 usb_bus_attach(struct usb_proc_msg *pm)
 589 {
 590         struct usb_bus *bus;
 591         struct usb_device *child;
 592         device_t dev;
 593         usb_error_t err;
 594         enum usb_dev_speed speed;
 595
 596         bus = ((struct usb_bus_msg *)pm)->bus;
 597         dev = bus->bdev;
 598
 599         DPRINTF("\n");
 600
 601         switch (bus->usbrev) {
 602         case USB_REV_1_0:
 603                 speed = USB_SPEED_FULL;
 604                 device_printf(bus->bdev, "12Mbps Full Speed USB v1.0\n");
 605                 break;
 606
 607         case USB_REV_1_1:
 608                 speed = USB_SPEED_FULL;
 609                 device_printf(bus->bdev, "12Mbps Full Speed USB v1.1\n");
 610                 break;
 611
 612         case USB_REV_2_0:
 613                 speed = USB_SPEED_HIGH;
 614                 device_printf(bus->bdev, "480Mbps High Speed USB v2.0\n");
 615                 break;
 616
 617         case USB_REV_2_5:
 618                 speed = USB_SPEED_VARIABLE;
 619                 device_printf(bus->bdev, "480Mbps Wireless USB v2.5\n");
 620                 break;
 621
 622         case USB_REV_3_0:
 623                 speed = USB_SPEED_SUPER;
 624                 device_printf(bus->bdev, "5.0Gbps Super Speed USB v3.0\n");
 625                 break;
 626
 627         default:
 628                 device_printf(bus->bdev, "Unsupported USB revision\n");
 629                 usb_root_mount_rel(bus);
 630                 return;
 631         }
 632
 633         /* default power_mask value */
 634         bus->hw_power_state =
 635           USB_HW_POWER_CONTROL |
 636           USB_HW_POWER_BULK |
 637           USB_HW_POWER_INTERRUPT |
 638           USB_HW_POWER_ISOC |
 639           USB_HW_POWER_NON_ROOT_HUB;
 640
 641         USB_BUS_UNLOCK(bus);
 642
 643         /* make sure power is set at least once */
 644
 645         if (bus->methods->set_hw_power != NULL) {
 646                 (bus->methods->set_hw_power) (bus);
 647         }
 648
 649         /* allocate the Root USB device */
 650
 651         child = usb_alloc_device(bus->bdev, bus, NULL, 0, 0, 1,
 652             speed, USB_MODE_HOST);
 653         if (child) {
 654                 err = usb_probe_and_attach(child,
 655                     USB_IFACE_INDEX_ANY);
 656                 if (!err) {
 657                         if ((bus->devices[USB_ROOT_HUB_ADDR] == NULL) ||
 658                             (bus->devices[USB_ROOT_HUB_ADDR]->hub == NULL)) {
 659                                 err = USB_ERR_NO_ROOT_HUB;
 660                         }
 661                 }
 662         } else {
 663                 err = USB_ERR_NOMEM;
 664         }
 665
 666         USB_BUS_LOCK(bus);
 667
 668         if (err) {
 669                 device_printf(bus->bdev, "Root HUB problem, error=%s\n",
 670                     usbd_errstr(err));
 671                 usb_root_mount_rel(bus);
 672         }
 673
 674         /* set softc - we are ready */
 675         device_set_softc(dev, bus);
 676
 677         /* start watchdog */
 678         usb_power_wdog(bus);
 679 }
 680
 681 /*------------------------------------------------------------------------*
 682  *      usb_attach_sub
 683  *
 684  * This function creates a thread which runs the USB attach code.
 685  *------------------------------------------------------------------------*/
 686 static void
 687 usb_attach_sub(device_t dev, struct usb_bus *bus)
 688 {
 689         const char *pname = device_get_nameunit(dev);
 690
 691         mtx_lock(&Giant);
 692         if (usb_devclass_ptr == NULL)
 693                 usb_devclass_ptr = devclass_find("usbus");
 694         mtx_unlock(&Giant);
 695
 696 #if USB_HAVE_PF
 697         usbpf_attach(bus);
 698 #endif
 699         /* Initialise USB process messages */
 700         bus->explore_msg[0].hdr.pm_callback = &usb_bus_explore;
 701         bus->explore_msg[0].bus = bus;
 702         bus->explore_msg[1].hdr.pm_callback = &usb_bus_explore;
 703         bus->explore_msg[1].bus = bus;
 704
 705         bus->detach_msg[0].hdr.pm_callback = &usb_bus_detach;
 706         bus->detach_msg[0].bus = bus;
 707         bus->detach_msg[1].hdr.pm_callback = &usb_bus_detach;
 708         bus->detach_msg[1].bus = bus;
 709
 710         bus->attach_msg[0].hdr.pm_callback = &usb_bus_attach;
 711         bus->attach_msg[0].bus = bus;
 712         bus->attach_msg[1].hdr.pm_callback = &usb_bus_attach;
 713         bus->attach_msg[1].bus = bus;
 714
 715         bus->suspend_msg[0].hdr.pm_callback = &usb_bus_suspend;
 716         bus->suspend_msg[0].bus = bus;
 717         bus->suspend_msg[1].hdr.pm_callback = &usb_bus_suspend;
 718         bus->suspend_msg[1].bus = bus;
 719
 720         bus->resume_msg[0].hdr.pm_callback = &usb_bus_resume;
 721         bus->resume_msg[0].bus = bus;
 722         bus->resume_msg[1].hdr.pm_callback = &usb_bus_resume;
 723         bus->resume_msg[1].bus = bus;
 724
 725         bus->shutdown_msg[0].hdr.pm_callback = &usb_bus_shutdown;
 726         bus->shutdown_msg[0].bus = bus;
 727         bus->shutdown_msg[1].hdr.pm_callback = &usb_bus_shutdown;
 728         bus->shutdown_msg[1].bus = bus;
 729
 730         /* Create USB explore and callback processes */
 731
 732         if (usb_proc_create(&bus->giant_callback_proc,
 733             &bus->bus_mtx, pname, USB_PRI_MED)) {
 734                 device_printf(dev, "WARNING: Creation of USB Giant "
 735                     "callback process failed.\n");
 736         } else if (usb_proc_create(&bus->non_giant_callback_proc,
 737             &bus->bus_mtx, pname, USB_PRI_HIGH)) {
 738                 device_printf(dev, "WARNING: Creation of USB non-Giant "
 739                     "callback process failed.\n");
 740         } else if (usb_proc_create(&bus->explore_proc,
 741             &bus->bus_mtx, pname, USB_PRI_MED)) {
 742                 device_printf(dev, "WARNING: Creation of USB explore "
 743                     "process failed.\n");
 744         } else if (usb_proc_create(&bus->control_xfer_proc,
 745             &bus->bus_mtx, pname, USB_PRI_MED)) {
 746                 device_printf(dev, "WARNING: Creation of USB control transfer "
 747                     "process failed.\n");
 748         } else {
 749                 /* Get final attach going */
 750                 USB_BUS_LOCK(bus);
 751                 usb_proc_msignal(&bus->explore_proc,
 752                     &bus->attach_msg[0], &bus->attach_msg[1]);
 753                 USB_BUS_UNLOCK(bus);
 754
 755                 /* Do initial explore */
 756                 usb_needs_explore(bus, 1);
 757         }
 758 }
 759
 760 SYSUNINIT(usb_bus_unload, SI_SUB_KLD, SI_ORDER_ANY, usb_bus_unload, NULL);
 761
 762 /*------------------------------------------------------------------------*
 763  *      usb_bus_mem_flush_all_cb
 764  *------------------------------------------------------------------------*/
 765 #if USB_HAVE_BUSDMA
 766 static void
 767 usb_bus_mem_flush_all_cb(struct usb_bus *bus, struct usb_page_cache *pc,
 768     struct usb_page *pg, usb_size_t size, usb_size_t align)
 769 {
 770         usb_pc_cpu_flush(pc);
 771 }
 772 #endif
 773
 774 /*------------------------------------------------------------------------*
 775  *      usb_bus_mem_flush_all - factored out code
 776  *------------------------------------------------------------------------*/
 777 #if USB_HAVE_BUSDMA
 778 void
 779 usb_bus_mem_flush_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb)
 780 {
 781         if (cb) {
 782                 cb(bus, &usb_bus_mem_flush_all_cb);
 783         }
 784 }
 785 #endif
 786
 787 /*------------------------------------------------------------------------*
 788  *      usb_bus_mem_alloc_all_cb
 789  *------------------------------------------------------------------------*/
 790 #if USB_HAVE_BUSDMA
 791 static void
 792 usb_bus_mem_alloc_all_cb(struct usb_bus *bus, struct usb_page_cache *pc,
 793     struct usb_page *pg, usb_size_t size, usb_size_t align)
 794 {
 795         /* need to initialize the page cache */
 796         pc->tag_parent = bus->dma_parent_tag;
 797
 798         if (usb_pc_alloc_mem(pc, pg, size, align)) {
 799                 bus->alloc_failed = 1;
 800         }
 801 }
 802 #endif
 803
 804 /*------------------------------------------------------------------------*
 805  *      usb_bus_mem_alloc_all - factored out code
 806  *
 807  * Returns:
 808  *    0: Success
 809  * Else: Failure
 810  *------------------------------------------------------------------------*/
 811 uint8_t
 812 usb_bus_mem_alloc_all(struct usb_bus *bus, bus_dma_tag_t dmat,
 813     usb_bus_mem_cb_t *cb)
 814 {
 815         bus->alloc_failed = 0;
 816
 817         mtx_init(&bus->bus_mtx, device_get_nameunit(bus->parent),
 818             NULL, MTX_DEF | MTX_RECURSE);
 819
 820         usb_callout_init_mtx(&bus->power_wdog,
 821             &bus->bus_mtx, 0);
 822
 823         TAILQ_INIT(&bus->intr_q.head);
 824
 825 #if USB_HAVE_BUSDMA
 826         usb_dma_tag_setup(bus->dma_parent_tag, bus->dma_tags,
 827             dmat, &bus->bus_mtx, NULL, 32, USB_BUS_DMA_TAG_MAX);
 828 #endif
 829         if ((bus->devices_max > USB_MAX_DEVICES) ||
 830             (bus->devices_max < USB_MIN_DEVICES) ||
 831             (bus->devices == NULL)) {
 832                 DPRINTFN(0, "Devices field has not been "
 833                     "initialised properly\n");
 834                 bus->alloc_failed = 1;          /* failure */
 835         }
 836 #if USB_HAVE_BUSDMA
 837         if (cb) {
 838                 cb(bus, &usb_bus_mem_alloc_all_cb);
 839         }
 840 #endif
 841         if (bus->alloc_failed) {
 842                 usb_bus_mem_free_all(bus, cb);
 843         }
 844         return (bus->alloc_failed);
 845 }
 846
 847 /*------------------------------------------------------------------------*
 848  *      usb_bus_mem_free_all_cb
 849  *------------------------------------------------------------------------*/
 850 #if USB_HAVE_BUSDMA
 851 static void
 852 usb_bus_mem_free_all_cb(struct usb_bus *bus, struct usb_page_cache *pc,
 853     struct usb_page *pg, usb_size_t size, usb_size_t align)
 854 {
 855         usb_pc_free_mem(pc);
 856 }
 857 #endif
 858
 859 /*------------------------------------------------------------------------*
 860  *      usb_bus_mem_free_all - factored out code
 861  *------------------------------------------------------------------------*/
 862 void
 863 usb_bus_mem_free_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb)
 864 {
 865 #if USB_HAVE_BUSDMA
 866         if (cb) {
 867                 cb(bus, &usb_bus_mem_free_all_cb);
 868         }
 869         usb_dma_tag_unsetup(bus->dma_parent_tag);
 870 #endif
 871
 872         mtx_destroy(&bus->bus_mtx);
 873 }