sys/dev/usb/usb_hub.c

   1 /* $FreeBSD$ */
   2 /*-
   3  * Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.
   4  * Copyright (c) 1998 Lennart Augustsson. All rights reserved.
   5  * Copyright (c) 2008-2010 Hans Petter Selasky. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 /*
  30  * USB spec: http://www.usb.org/developers/docs/usbspec.zip
  31  */
  32
  33 #ifdef USB_GLOBAL_INCLUDE_FILE
  34 #include USB_GLOBAL_INCLUDE_FILE
  35 #else
  36 #include <sys/stdint.h>
  37 #include <sys/stddef.h>
  38 #include <sys/param.h>
  39 #include <sys/queue.h>
  40 #include <sys/types.h>
  41 #include <sys/systm.h>
  42 #include <sys/kernel.h>
  43 #include <sys/bus.h>
  44 #include <sys/module.h>
  45 #include <sys/lock.h>
  46 #include <sys/mutex.h>
  47 #include <sys/condvar.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/sx.h>
  50 #include <sys/unistd.h>
  51 #include <sys/callout.h>
  52 #include <sys/malloc.h>
  53 #include <sys/priv.h>
  54
  55 #include <dev/usb/usb.h>
  56 #include <dev/usb/usbdi.h>
  57 #include <dev/usb/usbdi_util.h>
  58
  59 #define USB_DEBUG_VAR uhub_debug
  60
  61 #include <dev/usb/usb_core.h>
  62 #include <dev/usb/usb_process.h>
  63 #include <dev/usb/usb_device.h>
  64 #include <dev/usb/usb_request.h>
  65 #include <dev/usb/usb_debug.h>
  66 #include <dev/usb/usb_hub.h>
  67 #include <dev/usb/usb_util.h>
  68 #include <dev/usb/usb_busdma.h>
  69 #include <dev/usb/usb_transfer.h>
  70 #include <dev/usb/usb_dynamic.h>
  71
  72 #include <dev/usb/usb_controller.h>
  73 #include <dev/usb/usb_bus.h>
  74 #endif                  /* USB_GLOBAL_INCLUDE_FILE */
  75
  76 #define UHUB_INTR_INTERVAL 250          /* ms */
  77 enum {
  78         UHUB_INTR_TRANSFER,
  79 #if USB_HAVE_TT_SUPPORT
  80         UHUB_RESET_TT_TRANSFER,
  81 #endif
  82         UHUB_N_TRANSFER,
  83 };
  84
  85 #ifdef USB_DEBUG
  86 static int uhub_debug = 0;
  87
  88 static SYSCTL_NODE(_hw_usb, OID_AUTO, uhub, CTLFLAG_RW, 0, "USB HUB");
  89 SYSCTL_INT(_hw_usb_uhub, OID_AUTO, debug, CTLFLAG_RW | CTLFLAG_TUN, &uhub_debug, 0,
  90     "Debug level");
  91 TUNABLE_INT("hw.usb.uhub.debug", &uhub_debug);
  92 #endif
  93
  94 #if USB_HAVE_POWERD
  95 static int usb_power_timeout = 30;      /* seconds */
  96
  97 SYSCTL_INT(_hw_usb, OID_AUTO, power_timeout, CTLFLAG_RW,
  98     &usb_power_timeout, 0, "USB power timeout");
  99 #endif
 100
 101 #if USB_HAVE_DISABLE_ENUM
 102 static int usb_disable_enumeration = 0;
 103 SYSCTL_INT(_hw_usb, OID_AUTO, disable_enumeration, CTLFLAG_RWTUN,
 104     &usb_disable_enumeration, 0, "Set to disable all USB device enumeration.");
 105 TUNABLE_INT("hw.usb.disable_enumeration", &usb_disable_enumeration);
 106
 107 static int usb_disable_port_power = 0;
 108 SYSCTL_INT(_hw_usb, OID_AUTO, disable_port_power, CTLFLAG_RWTUN,
 109     &usb_disable_port_power, 0, "Set to disable all USB port power.");
 110 TUNABLE_INT("hw.usb.disable_port_power", &usb_disable_port_power);
 111 #endif
 112
 113 struct uhub_current_state {
 114         uint16_t port_change;
 115         uint16_t port_status;
 116 };
 117
 118 struct uhub_softc {
 119         struct uhub_current_state sc_st;/* current state */
 120 #if (USB_HAVE_FIXED_PORT != 0)
 121         struct usb_hub sc_hub;
 122 #endif
 123         device_t sc_dev;                /* base device */
 124         struct mtx sc_mtx;              /* our mutex */
 125         struct usb_device *sc_udev;     /* USB device */
 126         struct usb_xfer *sc_xfer[UHUB_N_TRANSFER];      /* interrupt xfer */
 127 #if USB_HAVE_DISABLE_ENUM
 128         int sc_disable_enumeration;
 129         int sc_disable_port_power;
 130 #endif
 131         uint8_t sc_flags;
 132 #define UHUB_FLAG_DID_EXPLORE 0x01
 133 };
 134
 135 #define UHUB_PROTO(sc) ((sc)->sc_udev->ddesc.bDeviceProtocol)
 136 #define UHUB_IS_HIGH_SPEED(sc) (UHUB_PROTO(sc) != UDPROTO_FSHUB)
 137 #define UHUB_IS_SINGLE_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBSTT)
 138 #define UHUB_IS_MULTI_TT(sc) (UHUB_PROTO(sc) == UDPROTO_HSHUBMTT)
 139 #define UHUB_IS_SUPER_SPEED(sc) (UHUB_PROTO(sc) == UDPROTO_SSHUB)
 140
 141 /* prototypes for type checking: */
 142
 143 static device_probe_t uhub_probe;
 144 static device_attach_t uhub_attach;
 145 static device_detach_t uhub_detach;
 146 static device_suspend_t uhub_suspend;
 147 static device_resume_t uhub_resume;
 148
 149 static bus_driver_added_t uhub_driver_added;
 150 static bus_child_location_str_t uhub_child_location_string;
 151 static bus_child_pnpinfo_str_t uhub_child_pnpinfo_string;
 152
 153 static usb_callback_t uhub_intr_callback;
 154 #if USB_HAVE_TT_SUPPORT
 155 static usb_callback_t uhub_reset_tt_callback;
 156 #endif
 157
 158 static void usb_dev_resume_peer(struct usb_device *udev);
 159 static void usb_dev_suspend_peer(struct usb_device *udev);
 160 static uint8_t usb_peer_should_wakeup(struct usb_device *udev);
 161
 162 static const struct usb_config uhub_config[UHUB_N_TRANSFER] = {
 163
 164         [UHUB_INTR_TRANSFER] = {
 165                 .type = UE_INTERRUPT,
 166                 .endpoint = UE_ADDR_ANY,
 167                 .direction = UE_DIR_ANY,
 168                 .timeout = 0,
 169                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 170                 .bufsize = 0,   /* use wMaxPacketSize */
 171                 .callback = &uhub_intr_callback,
 172                 .interval = UHUB_INTR_INTERVAL,
 173         },
 174 #if USB_HAVE_TT_SUPPORT
 175         [UHUB_RESET_TT_TRANSFER] = {
 176                 .type = UE_CONTROL,
 177                 .endpoint = 0x00,       /* Control pipe */
 178                 .direction = UE_DIR_ANY,
 179                 .bufsize = sizeof(struct usb_device_request),
 180                 .callback = &uhub_reset_tt_callback,
 181                 .timeout = 1000,        /* 1 second */
 182                 .usb_mode = USB_MODE_HOST,
 183         },
 184 #endif
 185 };
 186
 187 /*
 188  * driver instance for "hub" connected to "usb"
 189  * and "hub" connected to "hub"
 190  */
 191 static devclass_t uhub_devclass;
 192
 193 static device_method_t uhub_methods[] = {
 194         DEVMETHOD(device_probe, uhub_probe),
 195         DEVMETHOD(device_attach, uhub_attach),
 196         DEVMETHOD(device_detach, uhub_detach),
 197
 198         DEVMETHOD(device_suspend, uhub_suspend),
 199         DEVMETHOD(device_resume, uhub_resume),
 200
 201         DEVMETHOD(bus_child_location_str, uhub_child_location_string),
 202         DEVMETHOD(bus_child_pnpinfo_str, uhub_child_pnpinfo_string),
 203         DEVMETHOD(bus_driver_added, uhub_driver_added),
 204         DEVMETHOD_END
 205 };
 206
 207 static driver_t uhub_driver = {
 208         .name = "uhub",
 209         .methods = uhub_methods,
 210         .size = sizeof(struct uhub_softc)
 211 };
 212
 213 DRIVER_MODULE(uhub, usbus, uhub_driver, uhub_devclass, 0, 0);
 214 DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, NULL, 0);
 215 MODULE_VERSION(uhub, 1);
 216
 217 static void
 218 uhub_intr_callback(struct usb_xfer *xfer, usb_error_t error)
 219 {
 220         struct uhub_softc *sc = usbd_xfer_softc(xfer);
 221
 222         switch (USB_GET_STATE(xfer)) {
 223         case USB_ST_TRANSFERRED:
 224                 DPRINTFN(2, "\n");
 225                 /*
 226                  * This is an indication that some port
 227                  * has changed status. Notify the bus
 228                  * event handler thread that we need
 229                  * to be explored again:
 230                  */
 231                 usb_needs_explore(sc->sc_udev->bus, 0);
 232
 233         case USB_ST_SETUP:
 234                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 235                 usbd_transfer_submit(xfer);
 236                 break;
 237
 238         default:                        /* Error */
 239                 if (xfer->error != USB_ERR_CANCELLED) {
 240                         /*
 241                          * Do a clear-stall. The "stall_pipe" flag
 242                          * will get cleared before next callback by
 243                          * the USB stack.
 244                          */
 245                         usbd_xfer_set_stall(xfer);
 246                         usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 247                         usbd_transfer_submit(xfer);
 248                 }
 249                 break;
 250         }
 251 }
 252
 253 /*------------------------------------------------------------------------*
 254  *      uhub_reset_tt_proc
 255  *
 256  * This function starts the TT reset USB request
 257  *------------------------------------------------------------------------*/
 258 #if USB_HAVE_TT_SUPPORT
 259 static void
 260 uhub_reset_tt_proc(struct usb_proc_msg *_pm)
 261 {
 262         struct usb_udev_msg *pm = (void *)_pm;
 263         struct usb_device *udev = pm->udev;
 264         struct usb_hub *hub;
 265         struct uhub_softc *sc;
 266
 267         hub = udev->hub;
 268         if (hub == NULL)
 269                 return;
 270         sc = hub->hubsoftc;
 271         if (sc == NULL)
 272                 return;
 273
 274         /* Change lock */
 275         USB_BUS_UNLOCK(udev->bus);
 276         mtx_lock(&sc->sc_mtx);
 277         /* Start transfer */
 278         usbd_transfer_start(sc->sc_xfer[UHUB_RESET_TT_TRANSFER]);
 279         /* Change lock */
 280         mtx_unlock(&sc->sc_mtx);
 281         USB_BUS_LOCK(udev->bus);
 282 }
 283 #endif
 284
 285 /*------------------------------------------------------------------------*
 286  *      uhub_tt_buffer_reset_async_locked
 287  *
 288  * This function queues a TT reset for the given USB device and endpoint.
 289  *------------------------------------------------------------------------*/
 290 #if USB_HAVE_TT_SUPPORT
 291 void
 292 uhub_tt_buffer_reset_async_locked(struct usb_device *child, struct usb_endpoint *ep)
 293 {
 294         struct usb_device_request req;
 295         struct usb_device *udev;
 296         struct usb_hub *hub;
 297         struct usb_port *up;
 298         uint16_t wValue;
 299         uint8_t port;
 300
 301         if (child == NULL || ep == NULL)
 302                 return;
 303
 304         udev = child->parent_hs_hub;
 305         port = child->hs_port_no;
 306
 307         if (udev == NULL)
 308                 return;
 309
 310         hub = udev->hub;
 311         if ((hub == NULL) ||
 312             (udev->speed != USB_SPEED_HIGH) ||
 313             (child->speed != USB_SPEED_LOW &&
 314              child->speed != USB_SPEED_FULL) ||
 315             (child->flags.usb_mode != USB_MODE_HOST) ||
 316             (port == 0) || (ep->edesc == NULL)) {
 317                 /* not applicable */
 318                 return;
 319         }
 320
 321         USB_BUS_LOCK_ASSERT(udev->bus, MA_OWNED);
 322
 323         up = hub->ports + port - 1;
 324
 325         if (udev->ddesc.bDeviceClass == UDCLASS_HUB &&
 326             udev->ddesc.bDeviceProtocol == UDPROTO_HSHUBSTT)
 327                 port = 1;
 328
 329         /* if we already received a clear buffer request, reset the whole TT */
 330         if (up->req_reset_tt.bRequest != 0) {
 331                 req.bmRequestType = UT_WRITE_CLASS_OTHER;
 332                 req.bRequest = UR_RESET_TT;
 333                 USETW(req.wValue, 0);
 334                 req.wIndex[0] = port;
 335                 req.wIndex[1] = 0;
 336                 USETW(req.wLength, 0);
 337         } else {
 338                 wValue = (ep->edesc->bEndpointAddress & 0xF) |
 339                       ((child->address & 0x7F) << 4) |
 340                       ((ep->edesc->bEndpointAddress & 0x80) << 8) |
 341                       ((ep->edesc->bmAttributes & 3) << 12);
 342
 343                 req.bmRequestType = UT_WRITE_CLASS_OTHER;
 344                 req.bRequest = UR_CLEAR_TT_BUFFER;
 345                 USETW(req.wValue, wValue);
 346                 req.wIndex[0] = port;
 347                 req.wIndex[1] = 0;
 348                 USETW(req.wLength, 0);
 349         }
 350         up->req_reset_tt = req;
 351         /* get reset transfer started */
 352         usb_proc_msignal(USB_BUS_NON_GIANT_PROC(udev->bus),
 353             &hub->tt_msg[0], &hub->tt_msg[1]);
 354 }
 355 #endif
 356
 357 #if USB_HAVE_TT_SUPPORT
 358 static void
 359 uhub_reset_tt_callback(struct usb_xfer *xfer, usb_error_t error)
 360 {
 361         struct uhub_softc *sc;
 362         struct usb_device *udev;
 363         struct usb_port *up;
 364         uint8_t x;
 365
 366         DPRINTF("TT buffer reset\n");
 367
 368         sc = usbd_xfer_softc(xfer);
 369         udev = sc->sc_udev;
 370
 371         switch (USB_GET_STATE(xfer)) {
 372         case USB_ST_TRANSFERRED:
 373         case USB_ST_SETUP:
 374 tr_setup:
 375                 USB_BUS_LOCK(udev->bus);
 376                 /* find first port which needs a TT reset */
 377                 for (x = 0; x != udev->hub->nports; x++) {
 378                         up = udev->hub->ports + x;
 379
 380                         if (up->req_reset_tt.bRequest == 0)
 381                                 continue;
 382
 383                         /* copy in the transfer */
 384                         usbd_copy_in(xfer->frbuffers, 0, &up->req_reset_tt,
 385                             sizeof(up->req_reset_tt));
 386                         /* reset buffer */
 387                         memset(&up->req_reset_tt, 0, sizeof(up->req_reset_tt));
 388
 389                         /* set length */
 390                         usbd_xfer_set_frame_len(xfer, 0, sizeof(up->req_reset_tt));
 391                         xfer->nframes = 1;
 392                         USB_BUS_UNLOCK(udev->bus);
 393
 394                         usbd_transfer_submit(xfer);
 395                         return;
 396                 }
 397                 USB_BUS_UNLOCK(udev->bus);
 398                 break;
 399
 400         default:
 401                 if (error == USB_ERR_CANCELLED)
 402                         break;
 403
 404                 DPRINTF("TT buffer reset failed (%s)\n", usbd_errstr(error));
 405                 goto tr_setup;
 406         }
 407 }
 408 #endif
 409
 410 /*------------------------------------------------------------------------*
 411  *      uhub_count_active_host_ports
 412  *
 413  * This function counts the number of active ports at the given speed.
 414  *------------------------------------------------------------------------*/
 415 uint8_t
 416 uhub_count_active_host_ports(struct usb_device *udev, enum usb_dev_speed speed)
 417 {
 418         struct uhub_softc *sc;
 419         struct usb_device *child;
 420         struct usb_hub *hub;
 421         struct usb_port *up;
 422         uint8_t retval = 0;
 423         uint8_t x;
 424
 425         if (udev == NULL)
 426                 goto done;
 427         hub = udev->hub;
 428         if (hub == NULL)
 429                 goto done;
 430         sc = hub->hubsoftc;
 431         if (sc == NULL)
 432                 goto done;
 433
 434         for (x = 0; x != hub->nports; x++) {
 435                 up = hub->ports + x;
 436                 child = usb_bus_port_get_device(udev->bus, up);
 437                 if (child != NULL &&
 438                     child->flags.usb_mode == USB_MODE_HOST &&
 439                     child->speed == speed)
 440                         retval++;
 441         }
 442 done:
 443         return (retval);
 444 }
 445
 446 void
 447 uhub_explore_handle_re_enumerate(struct usb_device *child)
 448 {
 449         uint8_t do_unlock;
 450         usb_error_t err;
 451
 452         /* check if device should be re-enumerated */
 453         if (child->flags.usb_mode != USB_MODE_HOST)
 454                 return;
 455
 456         do_unlock = usbd_enum_lock(child);
 457         switch (child->re_enumerate_wait) {
 458         case USB_RE_ENUM_START:
 459                 err = usbd_set_config_index(child,
 460                     USB_UNCONFIG_INDEX);
 461                 if (err != 0) {
 462                         DPRINTF("Unconfigure failed: %s: Ignored.\n",
 463                             usbd_errstr(err));
 464                 }
 465                 if (child->parent_hub == NULL) {
 466                         /* the root HUB cannot be re-enumerated */
 467                         DPRINTFN(6, "cannot reset root HUB\n");
 468                         err = 0;
 469                 } else {
 470                         err = usbd_req_re_enumerate(child, NULL);
 471                 }
 472                 if (err == 0)
 473                         err = usbd_set_config_index(child, 0);
 474                 if (err == 0) {
 475                         err = usb_probe_and_attach(child,
 476                             USB_IFACE_INDEX_ANY);
 477                 }
 478                 child->re_enumerate_wait = USB_RE_ENUM_DONE;
 479                 break;
 480
 481         case USB_RE_ENUM_PWR_OFF:
 482                 /* get the device unconfigured */
 483                 err = usbd_set_config_index(child,
 484                     USB_UNCONFIG_INDEX);
 485                 if (err) {
 486                         DPRINTFN(0, "Could not unconfigure "
 487                             "device (ignored)\n");
 488                 }
 489                 if (child->parent_hub == NULL) {
 490                         /* the root HUB cannot be re-enumerated */
 491                         DPRINTFN(6, "cannot set port feature\n");
 492                         err = 0;
 493                 } else {
 494                         /* clear port enable */
 495                         err = usbd_req_clear_port_feature(child->parent_hub,
 496                             NULL, child->port_no, UHF_PORT_ENABLE);
 497                         if (err) {
 498                                 DPRINTFN(0, "Could not disable port "
 499                                     "(ignored)\n");
 500                         }
 501                 }
 502                 child->re_enumerate_wait = USB_RE_ENUM_DONE;
 503                 break;
 504
 505         case USB_RE_ENUM_SET_CONFIG:
 506                 err = usbd_set_config_index(child,
 507                     child->next_config_index);
 508                 if (err != 0) {
 509                         DPRINTF("Configure failed: %s: Ignored.\n",
 510                             usbd_errstr(err));
 511                 } else {
 512                         err = usb_probe_and_attach(child,
 513                             USB_IFACE_INDEX_ANY);
 514                 }
 515                 child->re_enumerate_wait = USB_RE_ENUM_DONE;
 516                 break;
 517
 518         default:
 519                 child->re_enumerate_wait = USB_RE_ENUM_DONE;
 520                 break;
 521         }
 522         if (do_unlock)
 523                 usbd_enum_unlock(child);
 524 }
 525
 526 /*------------------------------------------------------------------------*
 527  *      uhub_explore_sub - subroutine
 528  *
 529  * Return values:
 530  *    0: Success
 531  * Else: A control transaction failed
 532  *------------------------------------------------------------------------*/
 533 static usb_error_t
 534 uhub_explore_sub(struct uhub_softc *sc, struct usb_port *up)
 535 {
 536         struct usb_bus *bus;
 537         struct usb_device *child;
 538         uint8_t refcount;
 539         usb_error_t err;
 540
 541         bus = sc->sc_udev->bus;
 542         err = 0;
 543
 544         /* get driver added refcount from USB bus */
 545         refcount = bus->driver_added_refcount;
 546
 547         /* get device assosiated with the given port */
 548         child = usb_bus_port_get_device(bus, up);
 549         if (child == NULL) {
 550                 /* nothing to do */
 551                 goto done;
 552         }
 553
 554         uhub_explore_handle_re_enumerate(child);
 555
 556         /* check if probe and attach should be done */
 557
 558         if (child->driver_added_refcount != refcount) {
 559                 child->driver_added_refcount = refcount;
 560                 err = usb_probe_and_attach(child,
 561                     USB_IFACE_INDEX_ANY);
 562                 if (err) {
 563                         goto done;
 564                 }
 565         }
 566         /* start control transfer, if device mode */
 567
 568         if (child->flags.usb_mode == USB_MODE_DEVICE)
 569                 usbd_ctrl_transfer_setup(child);
 570
 571         /* if a HUB becomes present, do a recursive HUB explore */
 572
 573         if (child->hub)
 574                 err = (child->hub->explore) (child);
 575
 576 done:
 577         return (err);
 578 }
 579
 580 /*------------------------------------------------------------------------*
 581  *      uhub_read_port_status - factored out code
 582  *------------------------------------------------------------------------*/
 583 static usb_error_t
 584 uhub_read_port_status(struct uhub_softc *sc, uint8_t portno)
 585 {
 586         struct usb_port_status ps;
 587         usb_error_t err;
 588
 589         err = usbd_req_get_port_status(
 590             sc->sc_udev, NULL, &ps, portno);
 591
 592         /* update status regardless of error */
 593
 594         sc->sc_st.port_status = UGETW(ps.wPortStatus);
 595         sc->sc_st.port_change = UGETW(ps.wPortChange);
 596
 597         /* debugging print */
 598
 599         DPRINTFN(4, "port %d, wPortStatus=0x%04x, "
 600             "wPortChange=0x%04x, err=%s\n",
 601             portno, sc->sc_st.port_status,
 602             sc->sc_st.port_change, usbd_errstr(err));
 603         return (err);
 604 }
 605
 606 /*------------------------------------------------------------------------*
 607  *      uhub_reattach_port
 608  *
 609  * Returns:
 610  *    0: Success
 611  * Else: A control transaction failed
 612  *------------------------------------------------------------------------*/
 613 static usb_error_t
 614 uhub_reattach_port(struct uhub_softc *sc, uint8_t portno)
 615 {
 616         struct usb_device *child;
 617         struct usb_device *udev;
 618         enum usb_dev_speed speed;
 619         enum usb_hc_mode mode;
 620         usb_error_t err;
 621         uint16_t power_mask;
 622         uint8_t timeout;
 623
 624         DPRINTF("reattaching port %d\n", portno);
 625
 626         timeout = 0;
 627         udev = sc->sc_udev;
 628         child = usb_bus_port_get_device(udev->bus,
 629             udev->hub->ports + portno - 1);
 630
 631 repeat:
 632
 633         /* first clear the port connection change bit */
 634
 635         err = usbd_req_clear_port_feature(udev, NULL,
 636             portno, UHF_C_PORT_CONNECTION);
 637
 638         if (err)
 639                 goto error;
 640
 641         /* check if there is a child */
 642
 643         if (child != NULL) {
 644                 /*
 645                  * Free USB device and all subdevices, if any.
 646                  */
 647                 usb_free_device(child, 0);
 648                 child = NULL;
 649         }
 650         /* get fresh status */
 651
 652         err = uhub_read_port_status(sc, portno);
 653         if (err)
 654                 goto error;
 655
 656 #if USB_HAVE_DISABLE_ENUM
 657         /* check if we should skip enumeration from this USB HUB */
 658         if (usb_disable_enumeration != 0 ||
 659             sc->sc_disable_enumeration != 0) {
 660                 DPRINTF("Enumeration is disabled!\n");
 661                 goto error;
 662         }
 663 #endif
 664         /* check if nothing is connected to the port */
 665
 666         if (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS))
 667                 goto error;
 668
 669         /* check if there is no power on the port and print a warning */
 670
 671         switch (udev->speed) {
 672         case USB_SPEED_HIGH:
 673         case USB_SPEED_FULL:
 674         case USB_SPEED_LOW:
 675                 power_mask = UPS_PORT_POWER;
 676                 break;
 677         case USB_SPEED_SUPER:
 678                 if (udev->parent_hub == NULL)
 679                         power_mask = UPS_PORT_POWER;
 680                 else
 681                         power_mask = UPS_PORT_POWER_SS;
 682                 break;
 683         default:
 684                 power_mask = 0;
 685                 break;
 686         }
 687         if (!(sc->sc_st.port_status & power_mask)) {
 688                 DPRINTF("WARNING: strange, connected port %d "
 689                     "has no power\n", portno);
 690         }
 691
 692         /* check if the device is in Host Mode */
 693
 694         if (!(sc->sc_st.port_status & UPS_PORT_MODE_DEVICE)) {
 695
 696                 DPRINTF("Port %d is in Host Mode\n", portno);
 697
 698                 if (sc->sc_st.port_status & UPS_SUSPEND) {
 699                         /*
 700                          * NOTE: Should not get here in SuperSpeed
 701                          * mode, because the HUB should report this
 702                          * bit as zero.
 703                          */
 704                         DPRINTF("Port %d was still "
 705                             "suspended, clearing.\n", portno);
 706                         err = usbd_req_clear_port_feature(udev,
 707                             NULL, portno, UHF_PORT_SUSPEND);
 708                 }
 709
 710                 /* USB Host Mode */
 711
 712                 /* wait for maximum device power up time */
 713
 714                 usb_pause_mtx(NULL,
 715                     USB_MS_TO_TICKS(usb_port_powerup_delay));
 716
 717                 /* reset port, which implies enabling it */
 718
 719                 err = usbd_req_reset_port(udev, NULL, portno);
 720
 721                 if (err) {
 722                         DPRINTFN(0, "port %d reset "
 723                             "failed, error=%s\n",
 724                             portno, usbd_errstr(err));
 725                         goto error;
 726                 }
 727                 /* get port status again, it might have changed during reset */
 728
 729                 err = uhub_read_port_status(sc, portno);
 730                 if (err) {
 731                         goto error;
 732                 }
 733                 /* check if something changed during port reset */
 734
 735                 if ((sc->sc_st.port_change & UPS_C_CONNECT_STATUS) ||
 736                     (!(sc->sc_st.port_status & UPS_CURRENT_CONNECT_STATUS))) {
 737                         if (timeout) {
 738                                 DPRINTFN(0, "giving up port reset "
 739                                     "- device vanished\n");
 740                                 goto error;
 741                         }
 742                         timeout = 1;
 743                         goto repeat;
 744                 }
 745         } else {
 746                 DPRINTF("Port %d is in Device Mode\n", portno);
 747         }
 748
 749         /*
 750          * Figure out the device speed
 751          */
 752         switch (udev->speed) {
 753         case USB_SPEED_HIGH:
 754                 if (sc->sc_st.port_status & UPS_HIGH_SPEED)
 755                         speed = USB_SPEED_HIGH;
 756                 else if (sc->sc_st.port_status & UPS_LOW_SPEED)
 757                         speed = USB_SPEED_LOW;
 758                 else
 759                         speed = USB_SPEED_FULL;
 760                 break;
 761         case USB_SPEED_FULL:
 762                 if (sc->sc_st.port_status & UPS_LOW_SPEED)
 763                         speed = USB_SPEED_LOW;
 764                 else
 765                         speed = USB_SPEED_FULL;
 766                 break;
 767         case USB_SPEED_LOW:
 768                 speed = USB_SPEED_LOW;
 769                 break;
 770         case USB_SPEED_SUPER:
 771                 if (udev->parent_hub == NULL) {
 772                         /* Root HUB - special case */
 773                         switch (sc->sc_st.port_status & UPS_OTHER_SPEED) {
 774                         case 0:
 775                                 speed = USB_SPEED_FULL;
 776                                 break;
 777                         case UPS_LOW_SPEED:
 778                                 speed = USB_SPEED_LOW;
 779                                 break;
 780                         case UPS_HIGH_SPEED:
 781                                 speed = USB_SPEED_HIGH;
 782                                 break;
 783                         default:
 784                                 speed = USB_SPEED_SUPER;
 785                                 break;
 786                         }
 787                 } else {
 788                         speed = USB_SPEED_SUPER;
 789                 }
 790                 break;
 791         default:
 792                 /* same speed like parent */
 793                 speed = udev->speed;
 794                 break;
 795         }
 796         if (speed == USB_SPEED_SUPER) {
 797                 err = usbd_req_set_hub_u1_timeout(udev, NULL,
 798                     portno, 128 - (2 * udev->depth));
 799                 if (err) {
 800                         DPRINTFN(0, "port %d U1 timeout "
 801                             "failed, error=%s\n",
 802                             portno, usbd_errstr(err));
 803                 }
 804                 err = usbd_req_set_hub_u2_timeout(udev, NULL,
 805                     portno, 128 - (2 * udev->depth));
 806                 if (err) {
 807                         DPRINTFN(0, "port %d U2 timeout "
 808                             "failed, error=%s\n",
 809                             portno, usbd_errstr(err));
 810                 }
 811         }
 812
 813         /*
 814          * Figure out the device mode
 815          *
 816          * NOTE: This part is currently FreeBSD specific.
 817          */
 818         if (udev->parent_hub != NULL) {
 819                 /* inherit mode from the parent HUB */
 820                 mode = udev->parent_hub->flags.usb_mode;
 821         } else if (sc->sc_st.port_status & UPS_PORT_MODE_DEVICE)
 822                 mode = USB_MODE_DEVICE;
 823         else
 824                 mode = USB_MODE_HOST;
 825
 826         /* need to create a new child */
 827         child = usb_alloc_device(sc->sc_dev, udev->bus, udev,
 828             udev->depth + 1, portno - 1, portno, speed, mode);
 829         if (child == NULL) {
 830                 DPRINTFN(0, "could not allocate new device\n");
 831                 goto error;
 832         }
 833         return (0);                     /* success */
 834
 835 error:
 836         if (child != NULL) {
 837                 /*
 838                  * Free USB device and all subdevices, if any.
 839                  */
 840                 usb_free_device(child, 0);
 841                 child = NULL;
 842         }
 843         if (err == 0) {
 844                 if (sc->sc_st.port_status & UPS_PORT_ENABLED) {
 845                         err = usbd_req_clear_port_feature(
 846                             sc->sc_udev, NULL,
 847                             portno, UHF_PORT_ENABLE);
 848                 }
 849         }
 850         if (err) {
 851                 DPRINTFN(0, "device problem (%s), "
 852                     "disabling port %d\n", usbd_errstr(err), portno);
 853         }
 854         return (err);
 855 }
 856
 857 /*------------------------------------------------------------------------*
 858  *      usb_device_20_compatible
 859  *
 860  * Returns:
 861  *    0: HUB does not support suspend and resume
 862  * Else: HUB supports suspend and resume
 863  *------------------------------------------------------------------------*/
 864 static uint8_t
 865 usb_device_20_compatible(struct usb_device *udev)
 866 {
 867         if (udev == NULL)
 868                 return (0);
 869         switch (udev->speed) {
 870         case USB_SPEED_LOW:
 871         case USB_SPEED_FULL:
 872         case USB_SPEED_HIGH:
 873                 return (1);
 874         default:
 875                 return (0);
 876         }
 877 }
 878
 879 /*------------------------------------------------------------------------*
 880  *      uhub_suspend_resume_port
 881  *
 882  * Returns:
 883  *    0: Success
 884  * Else: A control transaction failed
 885  *------------------------------------------------------------------------*/
 886 static usb_error_t
 887 uhub_suspend_resume_port(struct uhub_softc *sc, uint8_t portno)
 888 {
 889         struct usb_device *child;
 890         struct usb_device *udev;
 891         uint8_t is_suspend;
 892         usb_error_t err;
 893
 894         DPRINTF("port %d\n", portno);
 895
 896         udev = sc->sc_udev;
 897         child = usb_bus_port_get_device(udev->bus,
 898             udev->hub->ports + portno - 1);
 899
 900         /* first clear the port suspend change bit */
 901
 902         if (usb_device_20_compatible(udev)) {
 903                 err = usbd_req_clear_port_feature(udev, NULL,
 904                     portno, UHF_C_PORT_SUSPEND);
 905         } else {
 906                 err = usbd_req_clear_port_feature(udev, NULL,
 907                     portno, UHF_C_PORT_LINK_STATE);
 908         }
 909
 910         if (err) {
 911                 DPRINTF("clearing suspend failed.\n");
 912                 goto done;
 913         }
 914         /* get fresh status */
 915
 916         err = uhub_read_port_status(sc, portno);
 917         if (err) {
 918                 DPRINTF("reading port status failed.\n");
 919                 goto done;
 920         }
 921         /* convert current state */
 922
 923         if (usb_device_20_compatible(udev)) {
 924                 if (sc->sc_st.port_status & UPS_SUSPEND) {
 925                         is_suspend = 1;
 926                 } else {
 927                         is_suspend = 0;
 928                 }
 929         } else {
 930                 switch (UPS_PORT_LINK_STATE_GET(sc->sc_st.port_status)) {
 931                 case UPS_PORT_LS_U3:
 932                         is_suspend = 1;
 933                         break;
 934                 case UPS_PORT_LS_SS_INA:
 935                         usbd_req_warm_reset_port(udev, NULL, portno);
 936                         is_suspend = 0;
 937                         break;
 938                 default:
 939                         is_suspend = 0;
 940                         break;
 941                 }
 942         }
 943
 944         DPRINTF("suspended=%u\n", is_suspend);
 945
 946         /* do the suspend or resume */
 947
 948         if (child) {
 949                 /*
 950                  * This code handle two cases: 1) Host Mode - we can only
 951                  * receive resume here 2) Device Mode - we can receive
 952                  * suspend and resume here
 953                  */
 954                 if (is_suspend == 0)
 955                         usb_dev_resume_peer(child);
 956                 else if (child->flags.usb_mode == USB_MODE_DEVICE)
 957                         usb_dev_suspend_peer(child);
 958         }
 959 done:
 960         return (err);
 961 }
 962
 963 /*------------------------------------------------------------------------*
 964  *      uhub_root_interrupt
 965  *
 966  * This function is called when a Root HUB interrupt has
 967  * happened. "ptr" and "len" makes up the Root HUB interrupt
 968  * packet. This function is called having the "bus_mtx" locked.
 969  *------------------------------------------------------------------------*/
 970 void
 971 uhub_root_intr(struct usb_bus *bus, const uint8_t *ptr, uint8_t len)
 972 {
 973         USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
 974
 975         usb_needs_explore(bus, 0);
 976 }
 977
 978 static uint8_t
 979 uhub_is_too_deep(struct usb_device *udev)
 980 {
 981         switch (udev->speed) {
 982         case USB_SPEED_FULL:
 983         case USB_SPEED_LOW:
 984         case USB_SPEED_HIGH:
 985                 if (udev->depth > USB_HUB_MAX_DEPTH)
 986                         return (1);
 987                 break;
 988         case USB_SPEED_SUPER:
 989                 if (udev->depth > USB_SS_HUB_DEPTH_MAX)
 990                         return (1);
 991                 break;
 992         default:
 993                 break;
 994         }
 995         return (0);
 996 }
 997
 998 /*------------------------------------------------------------------------*
 999  *      uhub_explore
1000  *
1001  * Returns:
1002  *     0: Success
1003  *  Else: Failure
1004  *------------------------------------------------------------------------*/
1005 static usb_error_t
1006 uhub_explore(struct usb_device *udev)
1007 {
1008         struct usb_hub *hub;
1009         struct uhub_softc *sc;
1010         struct usb_port *up;
1011         usb_error_t err;
1012         uint8_t portno;
1013         uint8_t x;
1014         uint8_t do_unlock;
1015
1016         hub = udev->hub;
1017         sc = hub->hubsoftc;
1018
1019         DPRINTFN(11, "udev=%p addr=%d\n", udev, udev->address);
1020
1021         /* ignore devices that are too deep */
1022         if (uhub_is_too_deep(udev))
1023                 return (USB_ERR_TOO_DEEP);
1024
1025         /* check if device is suspended */
1026         if (udev->flags.self_suspended) {
1027                 /* need to wait until the child signals resume */
1028                 DPRINTF("Device is suspended!\n");
1029                 return (0);
1030         }
1031
1032         /*
1033          * Make sure we don't race against user-space applications
1034          * like LibUSB:
1035          */
1036         do_unlock = usbd_enum_lock(udev);
1037
1038         for (x = 0; x != hub->nports; x++) {
1039                 up = hub->ports + x;
1040                 portno = x + 1;
1041
1042                 err = uhub_read_port_status(sc, portno);
1043                 if (err) {
1044                         /* most likely the HUB is gone */
1045                         break;
1046                 }
1047                 if (sc->sc_st.port_change & UPS_C_OVERCURRENT_INDICATOR) {
1048                         DPRINTF("Overcurrent on port %u.\n", portno);
1049                         err = usbd_req_clear_port_feature(
1050                             udev, NULL, portno, UHF_C_PORT_OVER_CURRENT);
1051                         if (err) {
1052                                 /* most likely the HUB is gone */
1053                                 break;
1054                         }
1055                 }
1056                 if (!(sc->sc_flags & UHUB_FLAG_DID_EXPLORE)) {
1057                         /*
1058                          * Fake a connect status change so that the
1059                          * status gets checked initially!
1060                          */
1061                         sc->sc_st.port_change |=
1062                             UPS_C_CONNECT_STATUS;
1063                 }
1064                 if (sc->sc_st.port_change & UPS_C_PORT_ENABLED) {
1065                         err = usbd_req_clear_port_feature(
1066                             udev, NULL, portno, UHF_C_PORT_ENABLE);
1067                         if (err) {
1068                                 /* most likely the HUB is gone */
1069                                 break;
1070                         }
1071                         if (sc->sc_st.port_change & UPS_C_CONNECT_STATUS) {
1072                                 /*
1073                                  * Ignore the port error if the device
1074                                  * has vanished !
1075                                  */
1076                         } else if (sc->sc_st.port_status & UPS_PORT_ENABLED) {
1077                                 DPRINTFN(0, "illegal enable change, "
1078                                     "port %d\n", portno);
1079                         } else {
1080
1081                                 if (up->restartcnt == USB_RESTART_MAX) {
1082                                         /* XXX could try another speed ? */
1083                                         DPRINTFN(0, "port error, giving up "
1084                                             "port %d\n", portno);
1085                                 } else {
1086                                         sc->sc_st.port_change |=
1087                                             UPS_C_CONNECT_STATUS;
1088                                         up->restartcnt++;
1089                                 }
1090                         }
1091                 }
1092                 if (sc->sc_st.port_change & UPS_C_CONNECT_STATUS) {
1093                         err = uhub_reattach_port(sc, portno);
1094                         if (err) {
1095                                 /* most likely the HUB is gone */
1096                                 break;
1097                         }
1098                 }
1099                 if (sc->sc_st.port_change & (UPS_C_SUSPEND |
1100                     UPS_C_PORT_LINK_STATE)) {
1101                         err = uhub_suspend_resume_port(sc, portno);
1102                         if (err) {
1103                                 /* most likely the HUB is gone */
1104                                 break;
1105                         }
1106                 }
1107                 err = uhub_explore_sub(sc, up);
1108                 if (err) {
1109                         /* no device(s) present */
1110                         continue;
1111                 }
1112                 /* explore succeeded - reset restart counter */
1113                 up->restartcnt = 0;
1114         }
1115
1116         if (do_unlock)
1117                 usbd_enum_unlock(udev);
1118
1119         /* initial status checked */
1120         sc->sc_flags |= UHUB_FLAG_DID_EXPLORE;
1121
1122         /* return success */
1123         return (USB_ERR_NORMAL_COMPLETION);
1124 }
1125
1126 static int
1127 uhub_probe(device_t dev)
1128 {
1129         struct usb_attach_arg *uaa = device_get_ivars(dev);
1130
1131         if (uaa->usb_mode != USB_MODE_HOST)
1132                 return (ENXIO);
1133
1134         /*
1135          * The subclass for USB HUBs is currently ignored because it
1136          * is 0 for some and 1 for others.
1137          */
1138         if (uaa->info.bConfigIndex == 0 &&
1139             uaa->info.bDeviceClass == UDCLASS_HUB)
1140                 return (0);
1141
1142         return (ENXIO);
1143 }
1144
1145 /* NOTE: The information returned by this function can be wrong. */
1146 usb_error_t
1147 uhub_query_info(struct usb_device *udev, uint8_t *pnports, uint8_t *ptt)
1148 {
1149         struct usb_hub_descriptor hubdesc20;
1150         struct usb_hub_ss_descriptor hubdesc30;
1151         usb_error_t err;
1152         uint8_t nports;
1153         uint8_t tt;
1154
1155         if (udev->ddesc.bDeviceClass != UDCLASS_HUB)
1156                 return (USB_ERR_INVAL);
1157
1158         nports = 0;
1159         tt = 0;
1160
1161         switch (udev->speed) {
1162         case USB_SPEED_LOW:
1163         case USB_SPEED_FULL:
1164         case USB_SPEED_HIGH:
1165                 /* assuming that there is one port */
1166                 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, 1);
1167                 if (err) {
1168                         DPRINTFN(0, "getting USB 2.0 HUB descriptor failed,"
1169                             "error=%s\n", usbd_errstr(err));
1170                         break;
1171                 }
1172                 nports = hubdesc20.bNbrPorts;
1173                 if (nports > 127)
1174                         nports = 127;
1175
1176                 if (udev->speed == USB_SPEED_HIGH)
1177                         tt = (UGETW(hubdesc20.wHubCharacteristics) >> 5) & 3;
1178                 break;
1179
1180         case USB_SPEED_SUPER:
1181                 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, 1);
1182                 if (err) {
1183                         DPRINTFN(0, "Getting USB 3.0 HUB descriptor failed,"
1184                             "error=%s\n", usbd_errstr(err));
1185                         break;
1186                 }
1187                 nports = hubdesc30.bNbrPorts;
1188                 if (nports > 16)
1189                         nports = 16;
1190                 break;
1191
1192         default:
1193                 err = USB_ERR_INVAL;
1194                 break;
1195         }
1196
1197         if (pnports != NULL)
1198                 *pnports = nports;
1199
1200         if (ptt != NULL)
1201                 *ptt = tt;
1202
1203         return (err);
1204 }
1205
1206 static int
1207 uhub_attach(device_t dev)
1208 {
1209         struct uhub_softc *sc = device_get_softc(dev);
1210         struct usb_attach_arg *uaa = device_get_ivars(dev);
1211         struct usb_device *udev = uaa->device;
1212         struct usb_device *parent_hub = udev->parent_hub;
1213         struct usb_hub *hub;
1214         struct usb_hub_descriptor hubdesc20;
1215         struct usb_hub_ss_descriptor hubdesc30;
1216 #if USB_HAVE_DISABLE_ENUM
1217         struct sysctl_ctx_list *sysctl_ctx;
1218         struct sysctl_oid *sysctl_tree;
1219 #endif
1220         uint16_t pwrdly;
1221         uint16_t nports;
1222         uint8_t x;
1223         uint8_t portno;
1224         uint8_t removable;
1225         uint8_t iface_index;
1226         usb_error_t err;
1227
1228         sc->sc_udev = udev;
1229         sc->sc_dev = dev;
1230
1231         mtx_init(&sc->sc_mtx, "USB HUB mutex", NULL, MTX_DEF);
1232
1233         device_set_usb_desc(dev);
1234
1235         DPRINTFN(2, "depth=%d selfpowered=%d, parent=%p, "
1236             "parent->selfpowered=%d\n",
1237             udev->depth,
1238             udev->flags.self_powered,
1239             parent_hub,
1240             parent_hub ?
1241             parent_hub->flags.self_powered : 0);
1242
1243         if (uhub_is_too_deep(udev)) {
1244                 DPRINTFN(0, "HUB at depth %d, "
1245                     "exceeds maximum. HUB ignored\n", (int)udev->depth);
1246                 goto error;
1247         }
1248
1249         if (!udev->flags.self_powered && parent_hub &&
1250             !parent_hub->flags.self_powered) {
1251                 DPRINTFN(0, "Bus powered HUB connected to "
1252                     "bus powered HUB. HUB ignored\n");
1253                 goto error;
1254         }
1255
1256         if (UHUB_IS_MULTI_TT(sc)) {
1257                 err = usbd_set_alt_interface_index(udev, 0, 1);
1258                 if (err) {
1259                         device_printf(dev, "MTT could not be enabled\n");
1260                         goto error;
1261                 }
1262                 device_printf(dev, "MTT enabled\n");
1263         }
1264
1265         /* get HUB descriptor */
1266
1267         DPRINTFN(2, "Getting HUB descriptor\n");
1268
1269         switch (udev->speed) {
1270         case USB_SPEED_LOW:
1271         case USB_SPEED_FULL:
1272         case USB_SPEED_HIGH:
1273                 /* assuming that there is one port */
1274                 err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, 1);
1275                 if (err) {
1276                         DPRINTFN(0, "getting USB 2.0 HUB descriptor failed,"
1277                             "error=%s\n", usbd_errstr(err));
1278                         goto error;
1279                 }
1280                 /* get number of ports */
1281                 nports = hubdesc20.bNbrPorts;
1282
1283                 /* get power delay */
1284                 pwrdly = ((hubdesc20.bPwrOn2PwrGood * UHD_PWRON_FACTOR) +
1285                     usb_extra_power_up_time);
1286
1287                 /* get complete HUB descriptor */
1288                 if (nports >= 8) {
1289                         /* check number of ports */
1290                         if (nports > 127) {
1291                                 DPRINTFN(0, "Invalid number of USB 2.0 ports,"
1292                                     "error=%s\n", usbd_errstr(err));
1293                                 goto error;
1294                         }
1295                         /* get complete HUB descriptor */
1296                         err = usbd_req_get_hub_descriptor(udev, NULL, &hubdesc20, nports);
1297
1298                         if (err) {
1299                                 DPRINTFN(0, "Getting USB 2.0 HUB descriptor failed,"
1300                                     "error=%s\n", usbd_errstr(err));
1301                                 goto error;
1302                         }
1303                         if (hubdesc20.bNbrPorts != nports) {
1304                                 DPRINTFN(0, "Number of ports changed\n");
1305                                 goto error;
1306                         }
1307                 }
1308                 break;
1309         case USB_SPEED_SUPER:
1310                 if (udev->parent_hub != NULL) {
1311                         err = usbd_req_set_hub_depth(udev, NULL,
1312                             udev->depth - 1);
1313                         if (err) {
1314                                 DPRINTFN(0, "Setting USB 3.0 HUB depth failed,"
1315                                     "error=%s\n", usbd_errstr(err));
1316                                 goto error;
1317                         }
1318                 }
1319                 err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, 1);
1320                 if (err) {
1321                         DPRINTFN(0, "Getting USB 3.0 HUB descriptor failed,"
1322                             "error=%s\n", usbd_errstr(err));
1323                         goto error;
1324                 }
1325                 /* get number of ports */
1326                 nports = hubdesc30.bNbrPorts;
1327
1328                 /* get power delay */
1329                 pwrdly = ((hubdesc30.bPwrOn2PwrGood * UHD_PWRON_FACTOR) +
1330                     usb_extra_power_up_time);
1331
1332                 /* get complete HUB descriptor */
1333                 if (nports >= 8) {
1334                         /* check number of ports */
1335                         if (nports > ((udev->parent_hub != NULL) ? 15 : 127)) {
1336                                 DPRINTFN(0, "Invalid number of USB 3.0 ports,"
1337                                     "error=%s\n", usbd_errstr(err));
1338                                 goto error;
1339                         }
1340                         /* get complete HUB descriptor */
1341                         err = usbd_req_get_ss_hub_descriptor(udev, NULL, &hubdesc30, nports);
1342
1343                         if (err) {
1344                                 DPRINTFN(0, "Getting USB 2.0 HUB descriptor failed,"
1345                                     "error=%s\n", usbd_errstr(err));
1346                                 goto error;
1347                         }
1348                         if (hubdesc30.bNbrPorts != nports) {
1349                                 DPRINTFN(0, "Number of ports changed\n");
1350                                 goto error;
1351                         }
1352                 }
1353                 break;
1354         default:
1355                 DPRINTF("Assuming HUB has only one port\n");
1356                 /* default number of ports */
1357                 nports = 1;
1358                 /* default power delay */
1359                 pwrdly = ((10 * UHD_PWRON_FACTOR) + usb_extra_power_up_time);
1360                 break;
1361         }
1362         if (nports == 0) {
1363                 DPRINTFN(0, "portless HUB\n");
1364                 goto error;
1365         }
1366         if (nports > USB_MAX_PORTS) {
1367                 DPRINTF("Port limit exceeded\n");
1368                 goto error;
1369         }
1370 #if (USB_HAVE_FIXED_PORT == 0)
1371         hub = malloc(sizeof(hub[0]) + (sizeof(hub->ports[0]) * nports),
1372             M_USBDEV, M_WAITOK | M_ZERO);
1373
1374         if (hub == NULL)
1375                 goto error;
1376 #else
1377         hub = &sc->sc_hub;
1378 #endif
1379         udev->hub = hub;
1380
1381         /* initialize HUB structure */
1382         hub->hubsoftc = sc;
1383         hub->explore = &uhub_explore;
1384         hub->nports = nports;
1385         hub->hubudev = udev;
1386 #if USB_HAVE_TT_SUPPORT
1387         hub->tt_msg[0].hdr.pm_callback = &uhub_reset_tt_proc;
1388         hub->tt_msg[0].udev = udev;
1389         hub->tt_msg[1].hdr.pm_callback = &uhub_reset_tt_proc;
1390         hub->tt_msg[1].udev = udev;
1391 #endif
1392         /* if self powered hub, give ports maximum current */
1393         if (udev->flags.self_powered) {
1394                 hub->portpower = USB_MAX_POWER;
1395         } else {
1396                 hub->portpower = USB_MIN_POWER;
1397         }
1398
1399         /* set up interrupt pipe */
1400         iface_index = 0;
1401         if (udev->parent_hub == NULL) {
1402                 /* root HUB is special */
1403                 err = 0;
1404         } else {
1405                 /* normal HUB */
1406                 err = usbd_transfer_setup(udev, &iface_index, sc->sc_xfer,
1407                     uhub_config, UHUB_N_TRANSFER, sc, &sc->sc_mtx);
1408         }
1409         if (err) {
1410                 DPRINTFN(0, "cannot setup interrupt transfer, "
1411                     "errstr=%s\n", usbd_errstr(err));
1412                 goto error;
1413         }
1414         /* wait with power off for a while */
1415         usb_pause_mtx(NULL, USB_MS_TO_TICKS(USB_POWER_DOWN_TIME));
1416
1417 #if USB_HAVE_DISABLE_ENUM
1418         /* Add device sysctls */
1419
1420         sysctl_ctx = device_get_sysctl_ctx(dev);
1421         sysctl_tree = device_get_sysctl_tree(dev);
1422
1423         if (sysctl_ctx != NULL && sysctl_tree != NULL) {
1424                 char path[128];
1425
1426                 snprintf(path, sizeof(path), "dev.uhub.%d.disable_enumeration",
1427                     device_get_unit(dev));
1428                 TUNABLE_INT_FETCH(path, &sc->sc_disable_enumeration);
1429
1430                 (void) SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
1431                     OID_AUTO, "disable_enumeration", CTLFLAG_RWTUN,
1432                     &sc->sc_disable_enumeration, 0,
1433                     "Set to disable enumeration on this USB HUB.");
1434
1435                 snprintf(path, sizeof(path), "dev.uhub.%d.disable_port_power",
1436                     device_get_unit(dev));
1437                 TUNABLE_INT_FETCH(path, &sc->sc_disable_port_power);
1438
1439                 (void) SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
1440                     OID_AUTO, "disable_port_power", CTLFLAG_RWTUN,
1441                     &sc->sc_disable_port_power, 0,
1442                     "Set to disable USB port power on this USB HUB.");
1443         }
1444 #endif
1445         /*
1446          * To have the best chance of success we do things in the exact same
1447          * order as Windoze98.  This should not be necessary, but some
1448          * devices do not follow the USB specs to the letter.
1449          *
1450          * These are the events on the bus when a hub is attached:
1451          *  Get device and config descriptors (see attach code)
1452          *  Get hub descriptor (see above)
1453          *  For all ports
1454          *     turn on power
1455          *     wait for power to become stable
1456          * (all below happens in explore code)
1457          *  For all ports
1458          *     clear C_PORT_CONNECTION
1459          *  For all ports
1460          *     get port status
1461          *     if device connected
1462          *        wait 100 ms
1463          *        turn on reset
1464          *        wait
1465          *        clear C_PORT_RESET
1466          *        get port status
1467          *        proceed with device attachment
1468          */
1469
1470         /* XXX should check for none, individual, or ganged power? */
1471
1472         removable = 0;
1473
1474         for (x = 0; x != nports; x++) {
1475                 /* set up data structures */
1476                 struct usb_port *up = hub->ports + x;
1477
1478                 up->device_index = 0;
1479                 up->restartcnt = 0;
1480                 portno = x + 1;
1481
1482                 /* check if port is removable */
1483                 switch (udev->speed) {
1484                 case USB_SPEED_LOW:
1485                 case USB_SPEED_FULL:
1486                 case USB_SPEED_HIGH:
1487                         if (!UHD_NOT_REMOV(&hubdesc20, portno))
1488                                 removable++;
1489                         break;
1490                 case USB_SPEED_SUPER:
1491                         if (!UHD_NOT_REMOV(&hubdesc30, portno))
1492                                 removable++;
1493                         break;
1494                 default:
1495                         DPRINTF("Assuming removable port\n");
1496                         removable++;
1497                         break;
1498                 }
1499                 if (err == 0) {
1500 #if USB_HAVE_DISABLE_ENUM
1501                         /* check if we should disable USB port power or not */
1502                         if (usb_disable_port_power != 0 ||
1503                             sc->sc_disable_port_power != 0) {
1504                                 /* turn the power off */
1505                                 DPRINTFN(0, "Turning port %d power off\n", portno);
1506                                 err = usbd_req_clear_port_feature(udev, NULL,
1507                                     portno, UHF_PORT_POWER);
1508                         } else {
1509 #endif
1510                                 /* turn the power on */
1511                                 DPRINTFN(0, "Turning port %d power on\n", portno);
1512                                 err = usbd_req_set_port_feature(udev, NULL,
1513                                     portno, UHF_PORT_POWER);
1514 #if USB_HAVE_DISABLE_ENUM
1515                         }
1516 #endif
1517                 }
1518                 if (err != 0) {
1519                         DPRINTFN(0, "port %d power on or off failed, %s\n",
1520                             portno, usbd_errstr(err));
1521                 }
1522                 DPRINTF("turn on port %d power\n",
1523                     portno);
1524
1525                 /* wait for stable power */
1526                 usb_pause_mtx(NULL, USB_MS_TO_TICKS(pwrdly));
1527         }
1528
1529         device_printf(dev, "%d port%s with %d "
1530             "removable, %s powered\n", nports, (nports != 1) ? "s" : "",
1531             removable, udev->flags.self_powered ? "self" : "bus");
1532
1533         /* Start the interrupt endpoint, if any */
1534
1535         mtx_lock(&sc->sc_mtx);
1536         usbd_transfer_start(sc->sc_xfer[UHUB_INTR_TRANSFER]);
1537         mtx_unlock(&sc->sc_mtx);
1538
1539         /* Enable automatic power save on all USB HUBs */
1540
1541         usbd_set_power_mode(udev, USB_POWER_MODE_SAVE);
1542
1543         return (0);
1544
1545 error:
1546         usbd_transfer_unsetup(sc->sc_xfer, UHUB_N_TRANSFER);
1547
1548 #if (USB_HAVE_FIXED_PORT == 0)
1549         free(udev->hub, M_USBDEV);
1550 #endif
1551         udev->hub = NULL;
1552
1553         mtx_destroy(&sc->sc_mtx);
1554
1555         return (ENXIO);
1556 }
1557
1558 /*
1559  * Called from process context when the hub is gone.
1560  * Detach all devices on active ports.
1561  */
1562 static int
1563 uhub_detach(device_t dev)
1564 {
1565         struct uhub_softc *sc = device_get_softc(dev);
1566         struct usb_hub *hub = sc->sc_udev->hub;
1567         struct usb_bus *bus = sc->sc_udev->bus;
1568         struct usb_device *child;
1569         uint8_t x;
1570
1571         if (hub == NULL)                /* must be partially working */
1572                 return (0);
1573
1574         /* Make sure interrupt transfer is gone. */
1575         usbd_transfer_unsetup(sc->sc_xfer, UHUB_N_TRANSFER);
1576
1577         /* Detach all ports */
1578         for (x = 0; x != hub->nports; x++) {
1579
1580                 child = usb_bus_port_get_device(bus, hub->ports + x);
1581
1582                 if (child == NULL) {
1583                         continue;
1584                 }
1585
1586                 /*
1587                  * Free USB device and all subdevices, if any.
1588                  */
1589                 usb_free_device(child, 0);
1590         }
1591
1592 #if USB_HAVE_TT_SUPPORT
1593         /* Make sure our TT messages are not queued anywhere */
1594         USB_BUS_LOCK(bus);
1595         usb_proc_mwait(USB_BUS_NON_GIANT_PROC(bus),
1596             &hub->tt_msg[0], &hub->tt_msg[1]);
1597         USB_BUS_UNLOCK(bus);
1598 #endif
1599
1600 #if (USB_HAVE_FIXED_PORT == 0)
1601         free(hub, M_USBDEV);
1602 #endif
1603         sc->sc_udev->hub = NULL;
1604
1605         mtx_destroy(&sc->sc_mtx);
1606
1607         return (0);
1608 }
1609
1610 static int
1611 uhub_suspend(device_t dev)
1612 {
1613         DPRINTF("\n");
1614         /* Sub-devices are not suspended here! */
1615         return (0);
1616 }
1617
1618 static int
1619 uhub_resume(device_t dev)
1620 {
1621         DPRINTF("\n");
1622         /* Sub-devices are not resumed here! */
1623         return (0);
1624 }
1625
1626 static void
1627 uhub_driver_added(device_t dev, driver_t *driver)
1628 {
1629         usb_needs_explore_all();
1630 }
1631
1632 struct hub_result {
1633         struct usb_device *udev;
1634         uint8_t portno;
1635         uint8_t iface_index;
1636 };
1637
1638 static void
1639 uhub_find_iface_index(struct usb_hub *hub, device_t child,
1640     struct hub_result *res)
1641 {
1642         struct usb_interface *iface;
1643         struct usb_device *udev;
1644         uint8_t nports;
1645         uint8_t x;
1646         uint8_t i;
1647
1648         nports = hub->nports;
1649         for (x = 0; x != nports; x++) {
1650                 udev = usb_bus_port_get_device(hub->hubudev->bus,
1651                     hub->ports + x);
1652                 if (!udev) {
1653                         continue;
1654                 }
1655                 for (i = 0; i != USB_IFACE_MAX; i++) {
1656                         iface = usbd_get_iface(udev, i);
1657                         if (iface &&
1658                             (iface->subdev == child)) {
1659                                 res->iface_index = i;
1660                                 res->udev = udev;
1661                                 res->portno = x + 1;
1662                                 return;
1663                         }
1664                 }
1665         }
1666         res->iface_index = 0;
1667         res->udev = NULL;
1668         res->portno = 0;
1669 }
1670
1671 static int
1672 uhub_child_location_string(device_t parent, device_t child,
1673     char *buf, size_t buflen)
1674 {
1675         struct uhub_softc *sc;
1676         struct usb_hub *hub;
1677         struct hub_result res;
1678
1679         if (!device_is_attached(parent)) {
1680                 if (buflen)
1681                         buf[0] = 0;
1682                 return (0);
1683         }
1684
1685         sc = device_get_softc(parent);
1686         hub = sc->sc_udev->hub;
1687
1688         mtx_lock(&Giant);
1689         uhub_find_iface_index(hub, child, &res);
1690         if (!res.udev) {
1691                 DPRINTF("device not on hub\n");
1692                 if (buflen) {
1693                         buf[0] = '\0';
1694                 }
1695                 goto done;
1696         }
1697         snprintf(buf, buflen, "bus=%u hubaddr=%u port=%u devaddr=%u interface=%u",
1698             device_get_unit(res.udev->bus->bdev),
1699             (res.udev->parent_hub != NULL) ? res.udev->parent_hub->device_index : 0,
1700             res.portno,
1701             res.udev->device_index, res.iface_index);
1702 done:
1703         mtx_unlock(&Giant);
1704
1705         return (0);
1706 }
1707
1708 static int
1709 uhub_child_pnpinfo_string(device_t parent, device_t child,
1710     char *buf, size_t buflen)
1711 {
1712         struct uhub_softc *sc;
1713         struct usb_hub *hub;
1714         struct usb_interface *iface;
1715         struct hub_result res;
1716
1717         if (!device_is_attached(parent)) {
1718                 if (buflen)
1719                         buf[0] = 0;
1720                 return (0);
1721         }
1722
1723         sc = device_get_softc(parent);
1724         hub = sc->sc_udev->hub;
1725
1726         mtx_lock(&Giant);
1727         uhub_find_iface_index(hub, child, &res);
1728         if (!res.udev) {
1729                 DPRINTF("device not on hub\n");
1730                 if (buflen) {
1731                         buf[0] = '\0';
1732                 }
1733                 goto done;
1734         }
1735         iface = usbd_get_iface(res.udev, res.iface_index);
1736         if (iface && iface->idesc) {
1737                 snprintf(buf, buflen, "vendor=0x%04x product=0x%04x "
1738                     "devclass=0x%02x devsubclass=0x%02x "
1739                     "sernum=\"%s\" "
1740                     "release=0x%04x "
1741                     "mode=%s "
1742                     "intclass=0x%02x intsubclass=0x%02x "
1743                     "intprotocol=0x%02x " "%s%s",
1744                     UGETW(res.udev->ddesc.idVendor),
1745                     UGETW(res.udev->ddesc.idProduct),
1746                     res.udev->ddesc.bDeviceClass,
1747                     res.udev->ddesc.bDeviceSubClass,
1748                     usb_get_serial(res.udev),
1749                     UGETW(res.udev->ddesc.bcdDevice),
1750                     (res.udev->flags.usb_mode == USB_MODE_HOST) ? "host" : "device",
1751                     iface->idesc->bInterfaceClass,
1752                     iface->idesc->bInterfaceSubClass,
1753                     iface->idesc->bInterfaceProtocol,
1754                     iface->pnpinfo ? " " : "",
1755                     iface->pnpinfo ? iface->pnpinfo : "");
1756         } else {
1757                 if (buflen) {
1758                         buf[0] = '\0';
1759                 }
1760                 goto done;
1761         }
1762 done:
1763         mtx_unlock(&Giant);
1764
1765         return (0);
1766 }
1767
1768 /*
1769  * The USB Transaction Translator:
1770  * ===============================
1771  *
1772  * When doing LOW- and FULL-speed USB transfers accross a HIGH-speed
1773  * USB HUB, bandwidth must be allocated for ISOCHRONOUS and INTERRUPT
1774  * USB transfers. To utilize bandwidth dynamically the "scatter and
1775  * gather" principle must be applied. This means that bandwidth must
1776  * be divided into equal parts of bandwidth. With regard to USB all
1777  * data is transferred in smaller packets with length
1778  * "wMaxPacketSize". The problem however is that "wMaxPacketSize" is
1779  * not a constant!
1780  *
1781  * The bandwidth scheduler which I have implemented will simply pack
1782  * the USB transfers back to back until there is no more space in the
1783  * schedule. Out of the 8 microframes which the USB 2.0 standard
1784  * provides, only 6 are available for non-HIGH-speed devices. I have
1785  * reserved the first 4 microframes for ISOCHRONOUS transfers. The
1786  * last 2 microframes I have reserved for INTERRUPT transfers. Without
1787  * this division, it is very difficult to allocate and free bandwidth
1788  * dynamically.
1789  *
1790  * NOTE about the Transaction Translator in USB HUBs:
1791  *
1792  * USB HUBs have a very simple Transaction Translator, that will
1793  * simply pipeline all the SPLIT transactions. That means that the
1794  * transactions will be executed in the order they are queued!
1795  *
1796  */
1797
1798 /*------------------------------------------------------------------------*
1799  *      usb_intr_find_best_slot
1800  *
1801  * Return value:
1802  *   The best Transaction Translation slot for an interrupt endpoint.
1803  *------------------------------------------------------------------------*/
1804 static uint8_t
1805 usb_intr_find_best_slot(usb_size_t *ptr, uint8_t start,
1806     uint8_t end, uint8_t mask)
1807 {
1808         usb_size_t min = (usb_size_t)-1;
1809         usb_size_t sum;
1810         uint8_t x;
1811         uint8_t y;
1812         uint8_t z;
1813
1814         y = 0;
1815
1816         /* find the last slot with lesser used bandwidth */
1817
1818         for (x = start; x < end; x++) {
1819
1820                 sum = 0;
1821
1822                 /* compute sum of bandwidth */
1823                 for (z = x; z < end; z++) {
1824                         if (mask & (1U << (z - x)))
1825                                 sum += ptr[z];
1826                 }
1827
1828                 /* check if the current multi-slot is more optimal */
1829                 if (min >= sum) {
1830                         min = sum;
1831                         y = x;
1832                 }
1833
1834                 /* check if the mask is about to be shifted out */
1835                 if (mask & (1U << (end - 1 - x)))
1836                         break;
1837         }
1838         return (y);
1839 }
1840
1841 /*------------------------------------------------------------------------*
1842  *      usb_hs_bandwidth_adjust
1843  *
1844  * This function will update the bandwith usage for the microframe
1845  * having index "slot" by "len" bytes. "len" can be negative.  If the
1846  * "slot" argument is greater or equal to "USB_HS_MICRO_FRAMES_MAX"
1847  * the "slot" argument will be replaced by the slot having least used
1848  * bandwidth. The "mask" argument is used for multi-slot allocations.
1849  *
1850  * Returns:
1851  *    The slot in which the bandwidth update was done: 0..7
1852  *------------------------------------------------------------------------*/
1853 static uint8_t
1854 usb_hs_bandwidth_adjust(struct usb_device *udev, int16_t len,
1855     uint8_t slot, uint8_t mask)
1856 {
1857         struct usb_bus *bus = udev->bus;
1858         struct usb_hub *hub;
1859         enum usb_dev_speed speed;
1860         uint8_t x;
1861
1862         USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
1863
1864         speed = usbd_get_speed(udev);
1865
1866         switch (speed) {
1867         case USB_SPEED_LOW:
1868         case USB_SPEED_FULL:
1869                 if (speed == USB_SPEED_LOW) {
1870                         len *= 8;
1871                 }
1872                 /*
1873                  * The Host Controller Driver should have
1874                  * performed checks so that the lookup
1875                  * below does not result in a NULL pointer
1876                  * access.
1877                  */
1878
1879                 hub = udev->parent_hs_hub->hub;
1880                 if (slot >= USB_HS_MICRO_FRAMES_MAX) {
1881                         slot = usb_intr_find_best_slot(hub->uframe_usage,
1882                             USB_FS_ISOC_UFRAME_MAX, 6, mask);
1883                 }
1884                 for (x = slot; x < 8; x++) {
1885                         if (mask & (1U << (x - slot))) {
1886                                 hub->uframe_usage[x] += len;
1887                                 bus->uframe_usage[x] += len;
1888                         }
1889                 }
1890                 break;
1891         default:
1892                 if (slot >= USB_HS_MICRO_FRAMES_MAX) {
1893                         slot = usb_intr_find_best_slot(bus->uframe_usage, 0,
1894                             USB_HS_MICRO_FRAMES_MAX, mask);
1895                 }
1896                 for (x = slot; x < 8; x++) {
1897                         if (mask & (1U << (x - slot))) {
1898                                 bus->uframe_usage[x] += len;
1899                         }
1900                 }
1901                 break;
1902         }
1903         return (slot);
1904 }
1905
1906 /*------------------------------------------------------------------------*
1907  *      usb_hs_bandwidth_alloc
1908  *
1909  * This function is a wrapper function for "usb_hs_bandwidth_adjust()".
1910  *------------------------------------------------------------------------*/
1911 void
1912 usb_hs_bandwidth_alloc(struct usb_xfer *xfer)
1913 {
1914         struct usb_device *udev;
1915         uint8_t slot;
1916         uint8_t mask;
1917         uint8_t speed;
1918
1919         udev = xfer->xroot->udev;
1920
1921         if (udev->flags.usb_mode != USB_MODE_HOST)
1922                 return;         /* not supported */
1923
1924         xfer->endpoint->refcount_bw++;
1925         if (xfer->endpoint->refcount_bw != 1)
1926                 return;         /* already allocated */
1927
1928         speed = usbd_get_speed(udev);
1929
1930         switch (xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) {
1931         case UE_INTERRUPT:
1932                 /* allocate a microframe slot */
1933
1934                 mask = 0x01;
1935                 slot = usb_hs_bandwidth_adjust(udev,
1936                     xfer->max_frame_size, USB_HS_MICRO_FRAMES_MAX, mask);
1937
1938                 xfer->endpoint->usb_uframe = slot;
1939                 xfer->endpoint->usb_smask = mask << slot;
1940
1941                 if ((speed != USB_SPEED_FULL) &&
1942                     (speed != USB_SPEED_LOW)) {
1943                         xfer->endpoint->usb_cmask = 0x00 ;
1944                 } else {
1945                         xfer->endpoint->usb_cmask = (-(0x04 << slot)) & 0xFE;
1946                 }
1947                 break;
1948
1949         case UE_ISOCHRONOUS:
1950                 switch (usbd_xfer_get_fps_shift(xfer)) {
1951                 case 0:
1952                         mask = 0xFF;
1953                         break;
1954                 case 1:
1955                         mask = 0x55;
1956                         break;
1957                 case 2:
1958                         mask = 0x11;
1959                         break;
1960                 default:
1961                         mask = 0x01;
1962                         break;
1963                 }
1964
1965                 /* allocate a microframe multi-slot */
1966
1967                 slot = usb_hs_bandwidth_adjust(udev,
1968                     xfer->max_frame_size, USB_HS_MICRO_FRAMES_MAX, mask);
1969
1970                 xfer->endpoint->usb_uframe = slot;
1971                 xfer->endpoint->usb_cmask = 0;
1972                 xfer->endpoint->usb_smask = mask << slot;
1973                 break;
1974
1975         default:
1976                 xfer->endpoint->usb_uframe = 0;
1977                 xfer->endpoint->usb_cmask = 0;
1978                 xfer->endpoint->usb_smask = 0;
1979                 break;
1980         }
1981
1982         DPRINTFN(11, "slot=%d, mask=0x%02x\n",
1983             xfer->endpoint->usb_uframe,
1984             xfer->endpoint->usb_smask >> xfer->endpoint->usb_uframe);
1985 }
1986
1987 /*------------------------------------------------------------------------*
1988  *      usb_hs_bandwidth_free
1989  *
1990  * This function is a wrapper function for "usb_hs_bandwidth_adjust()".
1991  *------------------------------------------------------------------------*/
1992 void
1993 usb_hs_bandwidth_free(struct usb_xfer *xfer)
1994 {
1995         struct usb_device *udev;
1996         uint8_t slot;
1997         uint8_t mask;
1998
1999         udev = xfer->xroot->udev;
2000
2001         if (udev->flags.usb_mode != USB_MODE_HOST)
2002                 return;         /* not supported */
2003
2004         xfer->endpoint->refcount_bw--;
2005         if (xfer->endpoint->refcount_bw != 0)
2006                 return;         /* still allocated */
2007
2008         switch (xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) {
2009         case UE_INTERRUPT:
2010         case UE_ISOCHRONOUS:
2011
2012                 slot = xfer->endpoint->usb_uframe;
2013                 mask = xfer->endpoint->usb_smask;
2014
2015                 /* free microframe slot(s): */
2016                 usb_hs_bandwidth_adjust(udev,
2017                     -xfer->max_frame_size, slot, mask >> slot);
2018
2019                 DPRINTFN(11, "slot=%d, mask=0x%02x\n",
2020                     slot, mask >> slot);
2021
2022                 xfer->endpoint->usb_uframe = 0;
2023                 xfer->endpoint->usb_cmask = 0;
2024                 xfer->endpoint->usb_smask = 0;
2025                 break;
2026
2027         default:
2028                 break;
2029         }
2030 }
2031
2032 /*------------------------------------------------------------------------*
2033  *      usb_isoc_time_expand
2034  *
2035  * This function will expand the time counter from 7-bit to 16-bit.
2036  *
2037  * Returns:
2038  *   16-bit isochronous time counter.
2039  *------------------------------------------------------------------------*/
2040 uint16_t
2041 usb_isoc_time_expand(struct usb_bus *bus, uint16_t isoc_time_curr)
2042 {
2043         uint16_t rem;
2044
2045         USB_BUS_LOCK_ASSERT(bus, MA_OWNED);
2046
2047         rem = bus->isoc_time_last & (USB_ISOC_TIME_MAX - 1);
2048
2049         isoc_time_curr &= (USB_ISOC_TIME_MAX - 1);
2050
2051         if (isoc_time_curr < rem) {
2052                 /* the time counter wrapped around */
2053                 bus->isoc_time_last += USB_ISOC_TIME_MAX;
2054         }
2055         /* update the remainder */
2056
2057         bus->isoc_time_last &= ~(USB_ISOC_TIME_MAX - 1);
2058         bus->isoc_time_last |= isoc_time_curr;
2059
2060         return (bus->isoc_time_last);
2061 }
2062
2063 /*------------------------------------------------------------------------*
2064  *      usbd_fs_isoc_schedule_alloc_slot
2065  *
2066  * This function will allocate bandwidth for an isochronous FULL speed
2067  * transaction in the FULL speed schedule.
2068  *
2069  * Returns:
2070  *    <8: Success
2071  * Else: Error
2072  *------------------------------------------------------------------------*/
2073 #if USB_HAVE_TT_SUPPORT
2074 uint8_t
2075 usbd_fs_isoc_schedule_alloc_slot(struct usb_xfer *isoc_xfer, uint16_t isoc_time)
2076 {
2077         struct usb_xfer *xfer;
2078         struct usb_xfer *pipe_xfer;
2079         struct usb_bus *bus;
2080         usb_frlength_t len;
2081         usb_frlength_t data_len;
2082         uint16_t delta;
2083         uint16_t slot;
2084         uint8_t retval;
2085
2086         data_len = 0;
2087         slot = 0;
2088
2089         bus = isoc_xfer->xroot->bus;
2090
2091         TAILQ_FOREACH(xfer, &bus->intr_q.head, wait_entry) {
2092
2093                 /* skip self, if any */
2094
2095                 if (xfer == isoc_xfer)
2096                         continue;
2097
2098                 /* check if this USB transfer is going through the same TT */
2099
2100                 if (xfer->xroot->udev->parent_hs_hub !=
2101                     isoc_xfer->xroot->udev->parent_hs_hub) {
2102                         continue;
2103                 }
2104                 if ((isoc_xfer->xroot->udev->parent_hs_hub->
2105                     ddesc.bDeviceProtocol == UDPROTO_HSHUBMTT) &&
2106                     (xfer->xroot->udev->hs_port_no !=
2107                     isoc_xfer->xroot->udev->hs_port_no)) {
2108                         continue;
2109                 }
2110                 if (xfer->endpoint->methods != isoc_xfer->endpoint->methods)
2111                         continue;
2112
2113                 /* check if isoc_time is part of this transfer */
2114
2115                 delta = xfer->isoc_time_complete - isoc_time;
2116                 if (delta > 0 && delta <= xfer->nframes) {
2117                         delta = xfer->nframes - delta;
2118
2119                         len = xfer->frlengths[delta];
2120                         len += 8;
2121                         len *= 7;
2122                         len /= 6;
2123
2124                         data_len += len;
2125                 }
2126
2127                 /*
2128                  * Check double buffered transfers. Only stream ID
2129                  * equal to zero is valid here!
2130                  */
2131                 TAILQ_FOREACH(pipe_xfer, &xfer->endpoint->endpoint_q[0].head,
2132                     wait_entry) {
2133
2134                         /* skip self, if any */
2135
2136                         if (pipe_xfer == isoc_xfer)
2137                                 continue;
2138
2139                         /* check if isoc_time is part of this transfer */
2140
2141                         delta = pipe_xfer->isoc_time_complete - isoc_time;
2142                         if (delta > 0 && delta <= pipe_xfer->nframes) {
2143                                 delta = pipe_xfer->nframes - delta;
2144
2145                                 len = pipe_xfer->frlengths[delta];
2146                                 len += 8;
2147                                 len *= 7;
2148                                 len /= 6;
2149
2150                                 data_len += len;
2151                         }
2152                 }
2153         }
2154
2155         while (data_len >= USB_FS_BYTES_PER_HS_UFRAME) {
2156                 data_len -= USB_FS_BYTES_PER_HS_UFRAME;
2157                 slot++;
2158         }
2159
2160         /* check for overflow */
2161
2162         if (slot >= USB_FS_ISOC_UFRAME_MAX)
2163                 return (255);
2164
2165         retval = slot;
2166
2167         delta = isoc_xfer->isoc_time_complete - isoc_time;
2168         if (delta > 0 && delta <= isoc_xfer->nframes) {
2169                 delta = isoc_xfer->nframes - delta;
2170
2171                 len = isoc_xfer->frlengths[delta];
2172                 len += 8;
2173                 len *= 7;
2174                 len /= 6;
2175
2176                 data_len += len;
2177         }
2178
2179         while (data_len >= USB_FS_BYTES_PER_HS_UFRAME) {
2180                 data_len -= USB_FS_BYTES_PER_HS_UFRAME;
2181                 slot++;
2182         }
2183
2184         /* check for overflow */
2185
2186         if (slot >= USB_FS_ISOC_UFRAME_MAX)
2187                 return (255);
2188
2189         return (retval);
2190 }
2191 #endif
2192
2193 /*------------------------------------------------------------------------*
2194  *      usb_bus_port_get_device
2195  *
2196  * This function is NULL safe.
2197  *------------------------------------------------------------------------*/
2198 struct usb_device *
2199 usb_bus_port_get_device(struct usb_bus *bus, struct usb_port *up)
2200 {
2201         if ((bus == NULL) || (up == NULL)) {
2202                 /* be NULL safe */
2203                 return (NULL);
2204         }
2205         if (up->device_index == 0) {
2206                 /* nothing to do */
2207                 return (NULL);
2208         }
2209         return (bus->devices[up->device_index]);
2210 }
2211
2212 /*------------------------------------------------------------------------*
2213  *      usb_bus_port_set_device
2214  *
2215  * This function is NULL safe.
2216  *------------------------------------------------------------------------*/
2217 void
2218 usb_bus_port_set_device(struct usb_bus *bus, struct usb_port *up,
2219     struct usb_device *udev, uint8_t device_index)
2220 {
2221         if (bus == NULL) {
2222                 /* be NULL safe */
2223                 return;
2224         }
2225         /*
2226          * There is only one case where we don't
2227          * have an USB port, and that is the Root Hub!
2228          */
2229         if (up) {
2230                 if (udev) {
2231                         up->device_index = device_index;
2232                 } else {
2233                         device_index = up->device_index;
2234                         up->device_index = 0;
2235                 }
2236         }
2237         /*
2238          * Make relationships to our new device
2239          */
2240         if (device_index != 0) {
2241 #if USB_HAVE_UGEN
2242                 mtx_lock(&usb_ref_lock);
2243 #endif
2244                 bus->devices[device_index] = udev;
2245 #if USB_HAVE_UGEN
2246                 mtx_unlock(&usb_ref_lock);
2247 #endif
2248         }
2249         /*
2250          * Debug print
2251          */
2252         DPRINTFN(2, "bus %p devices[%u] = %p\n", bus, device_index, udev);
2253 }
2254
2255 /*------------------------------------------------------------------------*
2256  *      usb_needs_explore
2257  *
2258  * This functions is called when the USB event thread needs to run.
2259  *------------------------------------------------------------------------*/
2260 void
2261 usb_needs_explore(struct usb_bus *bus, uint8_t do_probe)
2262 {
2263         uint8_t do_unlock;
2264
2265         DPRINTF("\n");
2266
2267         if (bus == NULL) {
2268                 DPRINTF("No bus pointer!\n");
2269                 return;
2270         }
2271         if ((bus->devices == NULL) ||
2272             (bus->devices[USB_ROOT_HUB_ADDR] == NULL)) {
2273                 DPRINTF("No root HUB\n");
2274                 return;
2275         }
2276         if (mtx_owned(&bus->bus_mtx)) {
2277                 do_unlock = 0;
2278         } else {
2279                 USB_BUS_LOCK(bus);
2280                 do_unlock = 1;
2281         }
2282         if (do_probe) {
2283                 bus->do_probe = 1;
2284         }
2285         if (usb_proc_msignal(USB_BUS_EXPLORE_PROC(bus),
2286             &bus->explore_msg[0], &bus->explore_msg[1])) {
2287                 /* ignore */
2288         }
2289         if (do_unlock) {
2290                 USB_BUS_UNLOCK(bus);
2291         }
2292 }
2293
2294 /*------------------------------------------------------------------------*
2295  *      usb_needs_explore_all
2296  *
2297  * This function is called whenever a new driver is loaded and will
2298  * cause that all USB busses are re-explored.
2299  *------------------------------------------------------------------------*/
2300 void
2301 usb_needs_explore_all(void)
2302 {
2303         struct usb_bus *bus;
2304         devclass_t dc;
2305         device_t dev;
2306         int max;
2307
2308         DPRINTFN(3, "\n");
2309
2310         dc = usb_devclass_ptr;
2311         if (dc == NULL) {
2312                 DPRINTFN(0, "no devclass\n");
2313                 return;
2314         }
2315         /*
2316          * Explore all USB busses in parallell.
2317          */
2318         max = devclass_get_maxunit(dc);
2319         while (max >= 0) {
2320                 dev = devclass_get_device(dc, max);
2321                 if (dev) {
2322                         bus = device_get_softc(dev);
2323                         if (bus) {
2324                                 usb_needs_explore(bus, 1);
2325                         }
2326                 }
2327                 max--;
2328         }
2329 }
2330
2331 /*------------------------------------------------------------------------*
2332  *      usb_bus_power_update
2333  *
2334  * This function will ensure that all USB devices on the given bus are
2335  * properly suspended or resumed according to the device transfer
2336  * state.
2337  *------------------------------------------------------------------------*/
2338 #if USB_HAVE_POWERD
2339 void
2340 usb_bus_power_update(struct usb_bus *bus)
2341 {
2342         usb_needs_explore(bus, 0 /* no probe */ );
2343 }
2344 #endif
2345
2346 /*------------------------------------------------------------------------*
2347  *      usbd_transfer_power_ref
2348  *
2349  * This function will modify the power save reference counts and
2350  * wakeup the USB device associated with the given USB transfer, if
2351  * needed.
2352  *------------------------------------------------------------------------*/
2353 #if USB_HAVE_POWERD
2354 void
2355 usbd_transfer_power_ref(struct usb_xfer *xfer, int val)
2356 {
2357         static const usb_power_mask_t power_mask[4] = {
2358                 [UE_CONTROL] = USB_HW_POWER_CONTROL,
2359                 [UE_BULK] = USB_HW_POWER_BULK,
2360                 [UE_INTERRUPT] = USB_HW_POWER_INTERRUPT,
2361                 [UE_ISOCHRONOUS] = USB_HW_POWER_ISOC,
2362         };
2363         struct usb_device *udev;
2364         uint8_t needs_explore;
2365         uint8_t needs_hw_power;
2366         uint8_t xfer_type;
2367
2368         udev = xfer->xroot->udev;
2369
2370         if (udev->device_index == USB_ROOT_HUB_ADDR) {
2371                 /* no power save for root HUB */
2372                 return;
2373         }
2374         USB_BUS_LOCK(udev->bus);
2375
2376         xfer_type = xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE;
2377
2378         udev->pwr_save.last_xfer_time = ticks;
2379         udev->pwr_save.type_refs[xfer_type] += val;
2380
2381         if (xfer->flags_int.control_xfr) {
2382                 udev->pwr_save.read_refs += val;
2383                 if (xfer->flags_int.usb_mode == USB_MODE_HOST) {
2384                         /*
2385                          * It is not allowed to suspend during a
2386                          * control transfer:
2387                          */
2388                         udev->pwr_save.write_refs += val;
2389                 }
2390         } else if (USB_GET_DATA_ISREAD(xfer)) {
2391                 udev->pwr_save.read_refs += val;
2392         } else {
2393                 udev->pwr_save.write_refs += val;
2394         }
2395
2396         if (val > 0) {
2397                 if (udev->flags.self_suspended)
2398                         needs_explore = usb_peer_should_wakeup(udev);
2399                 else
2400                         needs_explore = 0;
2401
2402                 if (!(udev->bus->hw_power_state & power_mask[xfer_type])) {
2403                         DPRINTF("Adding type %u to power state\n", xfer_type);
2404                         udev->bus->hw_power_state |= power_mask[xfer_type];
2405                         needs_hw_power = 1;
2406                 } else {
2407                         needs_hw_power = 0;
2408                 }
2409         } else {
2410                 needs_explore = 0;
2411                 needs_hw_power = 0;
2412         }
2413
2414         USB_BUS_UNLOCK(udev->bus);
2415
2416         if (needs_explore) {
2417                 DPRINTF("update\n");
2418                 usb_bus_power_update(udev->bus);
2419         } else if (needs_hw_power) {
2420                 DPRINTF("needs power\n");
2421                 if (udev->bus->methods->set_hw_power != NULL) {
2422                         (udev->bus->methods->set_hw_power) (udev->bus);
2423                 }
2424         }
2425 }
2426 #endif
2427
2428 /*------------------------------------------------------------------------*
2429  *      usb_peer_should_wakeup
2430  *
2431  * This function returns non-zero if the current device should wake up.
2432  *------------------------------------------------------------------------*/
2433 static uint8_t
2434 usb_peer_should_wakeup(struct usb_device *udev)
2435 {
2436         return (((udev->power_mode == USB_POWER_MODE_ON) &&
2437             (udev->flags.usb_mode == USB_MODE_HOST)) ||
2438             (udev->driver_added_refcount != udev->bus->driver_added_refcount) ||
2439             (udev->re_enumerate_wait != USB_RE_ENUM_DONE) ||
2440             (udev->pwr_save.type_refs[UE_ISOCHRONOUS] != 0) ||
2441             (udev->pwr_save.write_refs != 0) ||
2442             ((udev->pwr_save.read_refs != 0) &&
2443             (udev->flags.usb_mode == USB_MODE_HOST) &&
2444             (usb_peer_can_wakeup(udev) == 0)));
2445 }
2446
2447 /*------------------------------------------------------------------------*
2448  *      usb_bus_powerd
2449  *
2450  * This function implements the USB power daemon and is called
2451  * regularly from the USB explore thread.
2452  *------------------------------------------------------------------------*/
2453 #if USB_HAVE_POWERD
2454 void
2455 usb_bus_powerd(struct usb_bus *bus)
2456 {
2457         struct usb_device *udev;
2458         usb_ticks_t temp;
2459         usb_ticks_t limit;
2460         usb_ticks_t mintime;
2461         usb_size_t type_refs[5];
2462         uint8_t x;
2463
2464         limit = usb_power_timeout;
2465         if (limit == 0)
2466                 limit = hz;
2467         else if (limit > 255)
2468                 limit = 255 * hz;
2469         else
2470                 limit = limit * hz;
2471
2472         DPRINTF("bus=%p\n", bus);
2473
2474         USB_BUS_LOCK(bus);
2475
2476         /*
2477          * The root HUB device is never suspended
2478          * and we simply skip it.
2479          */
2480         for (x = USB_ROOT_HUB_ADDR + 1;
2481             x != bus->devices_max; x++) {
2482
2483                 udev = bus->devices[x];
2484                 if (udev == NULL)
2485                         continue;
2486
2487                 temp = ticks - udev->pwr_save.last_xfer_time;
2488
2489                 if (usb_peer_should_wakeup(udev)) {
2490                         /* check if we are suspended */
2491                         if (udev->flags.self_suspended != 0) {
2492                                 USB_BUS_UNLOCK(bus);
2493                                 usb_dev_resume_peer(udev);
2494                                 USB_BUS_LOCK(bus);
2495                         }
2496                 } else if ((temp >= limit) &&
2497                     (udev->flags.usb_mode == USB_MODE_HOST) &&
2498                     (udev->flags.self_suspended == 0)) {
2499                         /* try to do suspend */
2500
2501                         USB_BUS_UNLOCK(bus);
2502                         usb_dev_suspend_peer(udev);
2503                         USB_BUS_LOCK(bus);
2504                 }
2505         }
2506
2507         /* reset counters */
2508
2509         mintime = (usb_ticks_t)-1;
2510         type_refs[0] = 0;
2511         type_refs[1] = 0;
2512         type_refs[2] = 0;
2513         type_refs[3] = 0;
2514         type_refs[4] = 0;
2515
2516         /* Re-loop all the devices to get the actual state */
2517
2518         for (x = USB_ROOT_HUB_ADDR + 1;
2519             x != bus->devices_max; x++) {
2520
2521                 udev = bus->devices[x];
2522                 if (udev == NULL)
2523                         continue;
2524
2525                 /* we found a non-Root-Hub USB device */
2526                 type_refs[4] += 1;
2527
2528                 /* "last_xfer_time" can be updated by a resume */
2529                 temp = ticks - udev->pwr_save.last_xfer_time;
2530
2531                 /*
2532                  * Compute minimum time since last transfer for the complete
2533                  * bus:
2534                  */
2535                 if (temp < mintime)
2536                         mintime = temp;
2537
2538                 if (udev->flags.self_suspended == 0) {
2539                         type_refs[0] += udev->pwr_save.type_refs[0];
2540                         type_refs[1] += udev->pwr_save.type_refs[1];
2541                         type_refs[2] += udev->pwr_save.type_refs[2];
2542                         type_refs[3] += udev->pwr_save.type_refs[3];
2543                 }
2544         }
2545
2546         if (mintime >= (usb_ticks_t)(1 * hz)) {
2547                 /* recompute power masks */
2548                 DPRINTF("Recomputing power masks\n");
2549                 bus->hw_power_state = 0;
2550                 if (type_refs[UE_CONTROL] != 0)
2551                         bus->hw_power_state |= USB_HW_POWER_CONTROL;
2552                 if (type_refs[UE_BULK] != 0)
2553                         bus->hw_power_state |= USB_HW_POWER_BULK;
2554                 if (type_refs[UE_INTERRUPT] != 0)
2555                         bus->hw_power_state |= USB_HW_POWER_INTERRUPT;
2556                 if (type_refs[UE_ISOCHRONOUS] != 0)
2557                         bus->hw_power_state |= USB_HW_POWER_ISOC;
2558                 if (type_refs[4] != 0)
2559                         bus->hw_power_state |= USB_HW_POWER_NON_ROOT_HUB;
2560         }
2561         USB_BUS_UNLOCK(bus);
2562
2563         if (bus->methods->set_hw_power != NULL) {
2564                 /* always update hardware power! */
2565                 (bus->methods->set_hw_power) (bus);
2566         }
2567         return;
2568 }
2569 #endif
2570
2571 /*------------------------------------------------------------------------*
2572  *      usb_dev_resume_peer
2573  *
2574  * This function will resume an USB peer and do the required USB
2575  * signalling to get an USB device out of the suspended state.
2576  *------------------------------------------------------------------------*/
2577 static void
2578 usb_dev_resume_peer(struct usb_device *udev)
2579 {
2580         struct usb_bus *bus;
2581         int err;
2582
2583         /* be NULL safe */
2584         if (udev == NULL)
2585                 return;
2586
2587         /* check if already resumed */
2588         if (udev->flags.self_suspended == 0)
2589                 return;
2590
2591         /* we need a parent HUB to do resume */
2592         if (udev->parent_hub == NULL)
2593                 return;
2594
2595         DPRINTF("udev=%p\n", udev);
2596
2597         if ((udev->flags.usb_mode == USB_MODE_DEVICE) &&
2598             (udev->flags.remote_wakeup == 0)) {
2599                 /*
2600                  * If the host did not set the remote wakeup feature, we can
2601                  * not wake it up either!
2602                  */
2603                 DPRINTF("remote wakeup is not set!\n");
2604                 return;
2605         }
2606         /* get bus pointer */
2607         bus = udev->bus;
2608
2609         /* resume parent hub first */
2610         usb_dev_resume_peer(udev->parent_hub);
2611
2612         /* reduce chance of instant resume failure by waiting a little bit */
2613         usb_pause_mtx(NULL, USB_MS_TO_TICKS(20));
2614
2615         if (usb_device_20_compatible(udev)) {
2616                 /* resume current port (Valid in Host and Device Mode) */
2617                 err = usbd_req_clear_port_feature(udev->parent_hub,
2618                     NULL, udev->port_no, UHF_PORT_SUSPEND);
2619                 if (err) {
2620                         DPRINTFN(0, "Resuming port failed\n");
2621                         return;
2622                 }
2623         } else {
2624                 /* resume current port (Valid in Host and Device Mode) */
2625                 err = usbd_req_set_port_link_state(udev->parent_hub,
2626                     NULL, udev->port_no, UPS_PORT_LS_U0);
2627                 if (err) {
2628                         DPRINTFN(0, "Resuming port failed\n");
2629                         return;
2630                 }
2631         }
2632
2633         /* resume settle time */
2634         usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay));
2635
2636         if (bus->methods->device_resume != NULL) {
2637                 /* resume USB device on the USB controller */
2638                 (bus->methods->device_resume) (udev);
2639         }
2640         USB_BUS_LOCK(bus);
2641         /* set that this device is now resumed */
2642         udev->flags.self_suspended = 0;
2643 #if USB_HAVE_POWERD
2644         /* make sure that we don't go into suspend right away */
2645         udev->pwr_save.last_xfer_time = ticks;
2646
2647         /* make sure the needed power masks are on */
2648         if (udev->pwr_save.type_refs[UE_CONTROL] != 0)
2649                 bus->hw_power_state |= USB_HW_POWER_CONTROL;
2650         if (udev->pwr_save.type_refs[UE_BULK] != 0)
2651                 bus->hw_power_state |= USB_HW_POWER_BULK;
2652         if (udev->pwr_save.type_refs[UE_INTERRUPT] != 0)
2653                 bus->hw_power_state |= USB_HW_POWER_INTERRUPT;
2654         if (udev->pwr_save.type_refs[UE_ISOCHRONOUS] != 0)
2655                 bus->hw_power_state |= USB_HW_POWER_ISOC;
2656 #endif
2657         USB_BUS_UNLOCK(bus);
2658
2659         if (bus->methods->set_hw_power != NULL) {
2660                 /* always update hardware power! */
2661                 (bus->methods->set_hw_power) (bus);
2662         }
2663
2664         usbd_sr_lock(udev);
2665
2666         /* notify all sub-devices about resume */
2667         err = usb_suspend_resume(udev, 0);
2668
2669         usbd_sr_unlock(udev);
2670
2671         /* check if peer has wakeup capability */
2672         if (usb_peer_can_wakeup(udev)) {
2673                 /* clear remote wakeup */
2674                 err = usbd_req_clear_device_feature(udev,
2675                     NULL, UF_DEVICE_REMOTE_WAKEUP);
2676                 if (err) {
2677                         DPRINTFN(0, "Clearing device "
2678                             "remote wakeup failed: %s\n",
2679                             usbd_errstr(err));
2680                 }
2681         }
2682 }
2683
2684 /*------------------------------------------------------------------------*
2685  *      usb_dev_suspend_peer
2686  *
2687  * This function will suspend an USB peer and do the required USB
2688  * signalling to get an USB device into the suspended state.
2689  *------------------------------------------------------------------------*/
2690 static void
2691 usb_dev_suspend_peer(struct usb_device *udev)
2692 {
2693         struct usb_device *child;
2694         int err;
2695         uint8_t x;
2696         uint8_t nports;
2697
2698 repeat:
2699         /* be NULL safe */
2700         if (udev == NULL)
2701                 return;
2702
2703         /* check if already suspended */
2704         if (udev->flags.self_suspended)
2705                 return;
2706
2707         /* we need a parent HUB to do suspend */
2708         if (udev->parent_hub == NULL)
2709                 return;
2710
2711         DPRINTF("udev=%p\n", udev);
2712
2713         /* check if the current device is a HUB */
2714         if (udev->hub != NULL) {
2715                 nports = udev->hub->nports;
2716
2717                 /* check if all devices on the HUB are suspended */
2718                 for (x = 0; x != nports; x++) {
2719                         child = usb_bus_port_get_device(udev->bus,
2720                             udev->hub->ports + x);
2721
2722                         if (child == NULL)
2723                                 continue;
2724
2725                         if (child->flags.self_suspended)
2726                                 continue;
2727
2728                         DPRINTFN(1, "Port %u is busy on the HUB!\n", x + 1);
2729                         return;
2730                 }
2731         }
2732
2733         if (usb_peer_can_wakeup(udev)) {
2734                 /*
2735                  * This request needs to be done before we set
2736                  * "udev->flags.self_suspended":
2737                  */
2738
2739                 /* allow device to do remote wakeup */
2740                 err = usbd_req_set_device_feature(udev,
2741                     NULL, UF_DEVICE_REMOTE_WAKEUP);
2742                 if (err) {
2743                         DPRINTFN(0, "Setting device "
2744                             "remote wakeup failed\n");
2745                 }
2746         }
2747
2748         USB_BUS_LOCK(udev->bus);
2749         /*
2750          * Checking for suspend condition and setting suspended bit
2751          * must be atomic!
2752          */
2753         err = usb_peer_should_wakeup(udev);
2754         if (err == 0) {
2755                 /*
2756                  * Set that this device is suspended. This variable
2757                  * must be set before calling USB controller suspend
2758                  * callbacks.
2759                  */
2760                 udev->flags.self_suspended = 1;
2761         }
2762         USB_BUS_UNLOCK(udev->bus);
2763
2764         if (err != 0) {
2765                 if (usb_peer_can_wakeup(udev)) {
2766                         /* allow device to do remote wakeup */
2767                         err = usbd_req_clear_device_feature(udev,
2768                             NULL, UF_DEVICE_REMOTE_WAKEUP);
2769                         if (err) {
2770                                 DPRINTFN(0, "Setting device "
2771                                     "remote wakeup failed\n");
2772                         }
2773                 }
2774
2775                 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
2776                         /* resume parent HUB first */
2777                         usb_dev_resume_peer(udev->parent_hub);
2778
2779                         /* reduce chance of instant resume failure by waiting a little bit */
2780                         usb_pause_mtx(NULL, USB_MS_TO_TICKS(20));
2781
2782                         /* resume current port (Valid in Host and Device Mode) */
2783                         err = usbd_req_clear_port_feature(udev->parent_hub,
2784                             NULL, udev->port_no, UHF_PORT_SUSPEND);
2785
2786                         /* resume settle time */
2787                         usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay));
2788                 }
2789                 DPRINTF("Suspend was cancelled!\n");
2790                 return;
2791         }
2792
2793         usbd_sr_lock(udev);
2794
2795         /* notify all sub-devices about suspend */
2796         err = usb_suspend_resume(udev, 1);
2797
2798         usbd_sr_unlock(udev);
2799
2800         if (udev->bus->methods->device_suspend != NULL) {
2801                 usb_timeout_t temp;
2802
2803                 /* suspend device on the USB controller */
2804                 (udev->bus->methods->device_suspend) (udev);
2805
2806                 /* do DMA delay */
2807                 temp = usbd_get_dma_delay(udev);
2808                 if (temp != 0)
2809                         usb_pause_mtx(NULL, USB_MS_TO_TICKS(temp));
2810
2811         }
2812
2813         if (usb_device_20_compatible(udev)) {
2814                 /* suspend current port */
2815                 err = usbd_req_set_port_feature(udev->parent_hub,
2816                     NULL, udev->port_no, UHF_PORT_SUSPEND);
2817                 if (err) {
2818                         DPRINTFN(0, "Suspending port failed\n");
2819                         return;
2820                 }
2821         } else {
2822                 /* suspend current port */
2823                 err = usbd_req_set_port_link_state(udev->parent_hub,
2824                     NULL, udev->port_no, UPS_PORT_LS_U3);
2825                 if (err) {
2826                         DPRINTFN(0, "Suspending port failed\n");
2827                         return;
2828                 }
2829         }
2830
2831         udev = udev->parent_hub;
2832         goto repeat;
2833 }
2834
2835 /*------------------------------------------------------------------------*
2836  *      usbd_set_power_mode
2837  *
2838  * This function will set the power mode, see USB_POWER_MODE_XXX for a
2839  * USB device.
2840  *------------------------------------------------------------------------*/
2841 void
2842 usbd_set_power_mode(struct usb_device *udev, uint8_t power_mode)
2843 {
2844         /* filter input argument */
2845         if ((power_mode != USB_POWER_MODE_ON) &&
2846             (power_mode != USB_POWER_MODE_OFF))
2847                 power_mode = USB_POWER_MODE_SAVE;
2848
2849         power_mode = usbd_filter_power_mode(udev, power_mode);
2850
2851         udev->power_mode = power_mode;  /* update copy of power mode */
2852
2853 #if USB_HAVE_POWERD
2854         usb_bus_power_update(udev->bus);
2855 #else
2856         usb_needs_explore(udev->bus, 0 /* no probe */ );
2857 #endif
2858 }
2859
2860 /*------------------------------------------------------------------------*
2861  *      usbd_filter_power_mode
2862  *
2863  * This function filters the power mode based on hardware requirements.
2864  *------------------------------------------------------------------------*/
2865 uint8_t
2866 usbd_filter_power_mode(struct usb_device *udev, uint8_t power_mode)
2867 {
2868         struct usb_bus_methods *mtod;
2869         int8_t temp;
2870
2871         mtod = udev->bus->methods;
2872         temp = -1;
2873
2874         if (mtod->get_power_mode != NULL)
2875                 (mtod->get_power_mode) (udev, &temp);
2876
2877         /* check if we should not filter */
2878         if (temp < 0)
2879                 return (power_mode);
2880
2881         /* use fixed power mode given by hardware driver */
2882         return (temp);
2883 }
2884
2885 /*------------------------------------------------------------------------*
2886  *      usbd_start_re_enumerate
2887  *
2888  * This function starts re-enumeration of the given USB device. This
2889  * function does not need to be called BUS-locked. This function does
2890  * not wait until the re-enumeration is completed.
2891  *------------------------------------------------------------------------*/
2892 void
2893 usbd_start_re_enumerate(struct usb_device *udev)
2894 {
2895         if (udev->re_enumerate_wait == USB_RE_ENUM_DONE) {
2896                 udev->re_enumerate_wait = USB_RE_ENUM_START;
2897                 usb_needs_explore(udev->bus, 0);
2898         }
2899 }
2900
2901 /*-----------------------------------------------------------------------*
2902  *      usbd_start_set_config
2903  *
2904  * This function starts setting a USB configuration. This function
2905  * does not need to be called BUS-locked. This function does not wait
2906  * until the set USB configuratino is completed.
2907  *------------------------------------------------------------------------*/
2908 usb_error_t
2909 usbd_start_set_config(struct usb_device *udev, uint8_t index)
2910 {
2911         if (udev->re_enumerate_wait == USB_RE_ENUM_DONE) {
2912                 if (udev->curr_config_index == index) {
2913                         /* no change needed */
2914                         return (0);
2915                 }
2916                 udev->next_config_index = index;
2917                 udev->re_enumerate_wait = USB_RE_ENUM_SET_CONFIG;
2918                 usb_needs_explore(udev->bus, 0);
2919                 return (0);
2920         } else if (udev->re_enumerate_wait == USB_RE_ENUM_SET_CONFIG) {
2921                 if (udev->next_config_index == index) {
2922                         /* no change needed */
2923                         return (0);
2924                 }
2925         }
2926         return (USB_ERR_PENDING_REQUESTS);
2927 }