drivers/usb/host/ehci-hub.c

   1 /*
   2  * Copyright (C) 2001-2004 by David Brownell
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or (at your
   7  * option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 /* this file is part of ehci-hcd.c */
  20
  21 /*-------------------------------------------------------------------------*/
  22
  23 /*
  24  * EHCI Root Hub ... the nonsharable stuff
  25  *
  26  * Registers don't need cpu_to_le32, that happens transparently
  27  */
  28
  29 /*-------------------------------------------------------------------------*/
  30 #include <linux/usb/otg.h>
  31
  32 #define PORT_WAKE_BITS  (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
  33
  34 #ifdef  CONFIG_PM
  35
  36 static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
  37 {
  38         return !udev->maxchild && udev->persist_enabled &&
  39                 udev->bus->root_hub->speed < USB_SPEED_HIGH;
  40 }
  41
  42 /* After a power loss, ports that were owned by the companion must be
  43  * reset so that the companion can still own them.
  44  */
  45 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
  46 {
  47         u32 __iomem     *reg;
  48         u32             status;
  49         int             port;
  50         __le32          buf;
  51         struct usb_hcd  *hcd = ehci_to_hcd(ehci);
  52
  53         if (!ehci->owned_ports)
  54                 return;
  55
  56         /*
  57          * USB 1.1 devices are mostly HIDs, which don't need to persist across
  58          * suspends. If we ensure that none of our companion's devices have
  59          * persist_enabled (by looking through all USB 1.1 buses in the system),
  60          * we can skip this and avoid slowing resume down. Devices without
  61          * persist will just get reenumerated shortly after resume anyway.
  62          */
  63         if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
  64                 return;
  65
  66         /* Make sure the ports are powered */
  67         port = HCS_N_PORTS(ehci->hcs_params);
  68         while (port--) {
  69                 if (test_bit(port, &ehci->owned_ports)) {
  70                         reg = &ehci->regs->port_status[port];
  71                         status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
  72                         if (!(status & PORT_POWER)) {
  73                                 status |= PORT_POWER;
  74                                 ehci_writel(ehci, status, reg);
  75                         }
  76                 }
  77         }
  78
  79         /* Give the connections some time to appear */
  80         msleep(20);
  81
  82         spin_lock_irq(&ehci->lock);
  83         port = HCS_N_PORTS(ehci->hcs_params);
  84         while (port--) {
  85                 if (test_bit(port, &ehci->owned_ports)) {
  86                         reg = &ehci->regs->port_status[port];
  87                         status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
  88
  89                         /* Port already owned by companion? */
  90                         if (status & PORT_OWNER)
  91                                 clear_bit(port, &ehci->owned_ports);
  92                         else if (test_bit(port, &ehci->companion_ports))
  93                                 ehci_writel(ehci, status & ~PORT_PE, reg);
  94                         else {
  95                                 spin_unlock_irq(&ehci->lock);
  96                                 ehci_hub_control(hcd, SetPortFeature,
  97                                                 USB_PORT_FEAT_RESET, port + 1,
  98                                                 NULL, 0);
  99                                 spin_lock_irq(&ehci->lock);
 100                         }
 101                 }
 102         }
 103         spin_unlock_irq(&ehci->lock);
 104
 105         if (!ehci->owned_ports)
 106                 return;
 107         msleep(90);             /* Wait for resets to complete */
 108
 109         spin_lock_irq(&ehci->lock);
 110         port = HCS_N_PORTS(ehci->hcs_params);
 111         while (port--) {
 112                 if (test_bit(port, &ehci->owned_ports)) {
 113                         spin_unlock_irq(&ehci->lock);
 114                         ehci_hub_control(hcd, GetPortStatus,
 115                                         0, port + 1,
 116                                         (char *) &buf, sizeof(buf));
 117                         spin_lock_irq(&ehci->lock);
 118
 119                         /* The companion should now own the port,
 120                          * but if something went wrong the port must not
 121                          * remain enabled.
 122                          */
 123                         reg = &ehci->regs->port_status[port];
 124                         status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
 125                         if (status & PORT_OWNER)
 126                                 ehci_writel(ehci, status | PORT_CSC, reg);
 127                         else {
 128                                 ehci_dbg(ehci, "failed handover port %d: %x\n",
 129                                                 port + 1, status);
 130                                 ehci_writel(ehci, status & ~PORT_PE, reg);
 131                         }
 132                 }
 133         }
 134
 135         ehci->owned_ports = 0;
 136         spin_unlock_irq(&ehci->lock);
 137 }
 138
 139 static int ehci_port_change(struct ehci_hcd *ehci)
 140 {
 141         int i = HCS_N_PORTS(ehci->hcs_params);
 142
 143         /* First check if the controller indicates a change event */
 144
 145         if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
 146                 return 1;
 147
 148         /*
 149          * Not all controllers appear to update this while going from D3 to D0,
 150          * so check the individual port status registers as well
 151          */
 152
 153         while (i--)
 154                 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
 155                         return 1;
 156
 157         return 0;
 158 }
 159
 160 static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
 161                 bool suspending, bool do_wakeup)
 162 {
 163         int             port;
 164         u32             temp;
 165
 166         /* If remote wakeup is enabled for the root hub but disabled
 167          * for the controller, we must adjust all the port wakeup flags
 168          * when the controller is suspended or resumed.  In all other
 169          * cases they don't need to be changed.
 170          */
 171         if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
 172                 return;
 173
 174         spin_lock_irq(&ehci->lock);
 175
 176         /* clear phy low-power mode before changing wakeup flags */
 177         if (ehci->has_tdi_phy_lpm) {
 178                 port = HCS_N_PORTS(ehci->hcs_params);
 179                 while (port--) {
 180                         u32 __iomem     *hostpc_reg = &ehci->regs->hostpc[port];
 181
 182                         temp = ehci_readl(ehci, hostpc_reg);
 183                         ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
 184                 }
 185                 spin_unlock_irq(&ehci->lock);
 186                 msleep(5);
 187                 spin_lock_irq(&ehci->lock);
 188         }
 189
 190         port = HCS_N_PORTS(ehci->hcs_params);
 191         while (port--) {
 192                 u32 __iomem     *reg = &ehci->regs->port_status[port];
 193                 u32             t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
 194                 u32             t2 = t1 & ~PORT_WAKE_BITS;
 195
 196                 /* If we are suspending the controller, clear the flags.
 197                  * If we are resuming the controller, set the wakeup flags.
 198                  */
 199                 if (!suspending) {
 200                         if (t1 & PORT_CONNECT)
 201                                 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
 202                         else
 203                                 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
 204                 }
 205                 ehci_writel(ehci, t2, reg);
 206         }
 207
 208         /* enter phy low-power mode again */
 209         if (ehci->has_tdi_phy_lpm) {
 210                 port = HCS_N_PORTS(ehci->hcs_params);
 211                 while (port--) {
 212                         u32 __iomem     *hostpc_reg = &ehci->regs->hostpc[port];
 213
 214                         temp = ehci_readl(ehci, hostpc_reg);
 215                         ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
 216                 }
 217         }
 218
 219         /* Does the root hub have a port wakeup pending? */
 220         if (!suspending && ehci_port_change(ehci))
 221                 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
 222
 223         spin_unlock_irq(&ehci->lock);
 224 }
 225
 226 static int ehci_bus_suspend (struct usb_hcd *hcd)
 227 {
 228         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
 229         int                     port;
 230         int                     mask;
 231         int                     changed;
 232         bool                    fs_idle_delay;
 233
 234         ehci_dbg(ehci, "suspend root hub\n");
 235
 236         if (time_before (jiffies, ehci->next_statechange))
 237                 msleep(5);
 238
 239         /* stop the schedules */
 240         ehci_quiesce(ehci);
 241
 242         spin_lock_irq (&ehci->lock);
 243         if (ehci->rh_state < EHCI_RH_RUNNING)
 244                 goto done;
 245
 246         /* Once the controller is stopped, port resumes that are already
 247          * in progress won't complete.  Hence if remote wakeup is enabled
 248          * for the root hub and any ports are in the middle of a resume or
 249          * remote wakeup, we must fail the suspend.
 250          */
 251         if (hcd->self.root_hub->do_remote_wakeup) {
 252                 if (ehci->resuming_ports) {
 253                         spin_unlock_irq(&ehci->lock);
 254                         ehci_dbg(ehci, "suspend failed because a port is resuming\n");
 255                         return -EBUSY;
 256                 }
 257         }
 258
 259         /* Unlike other USB host controller types, EHCI doesn't have
 260          * any notion of "global" or bus-wide suspend.  The driver has
 261          * to manually suspend all the active unsuspended ports, and
 262          * then manually resume them in the bus_resume() routine.
 263          */
 264         ehci->bus_suspended = 0;
 265         ehci->owned_ports = 0;
 266         changed = 0;
 267         fs_idle_delay = false;
 268         port = HCS_N_PORTS(ehci->hcs_params);
 269         while (port--) {
 270                 u32 __iomem     *reg = &ehci->regs->port_status [port];
 271                 u32             t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
 272                 u32             t2 = t1 & ~PORT_WAKE_BITS;
 273
 274                 /* keep track of which ports we suspend */
 275                 if (t1 & PORT_OWNER)
 276                         set_bit(port, &ehci->owned_ports);
 277                 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
 278                         t2 |= PORT_SUSPEND;
 279                         set_bit(port, &ehci->bus_suspended);
 280                 }
 281
 282                 /* enable remote wakeup on all ports, if told to do so */
 283                 if (hcd->self.root_hub->do_remote_wakeup) {
 284                         /* only enable appropriate wake bits, otherwise the
 285                          * hardware can not go phy low power mode. If a race
 286                          * condition happens here(connection change during bits
 287                          * set), the port change detection will finally fix it.
 288                          */
 289                         if (t1 & PORT_CONNECT)
 290                                 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
 291                         else
 292                                 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
 293                 }
 294
 295                 if (t1 != t2) {
 296                         /*
 297                          * On some controllers, Wake-On-Disconnect will
 298                          * generate false wakeup signals until the bus
 299                          * switches over to full-speed idle.  For their
 300                          * sake, add a delay if we need one.
 301                          */
 302                         if ((t2 & PORT_WKDISC_E) &&
 303                                         ehci_port_speed(ehci, t2) ==
 304                                                 USB_PORT_STAT_HIGH_SPEED)
 305                                 fs_idle_delay = true;
 306                         ehci_writel(ehci, t2, reg);
 307                         if ((t2 & PORT_WKDISC_E)
 308                                 && (ehci_port_speed(ehci, t2) ==
 309                                         USB_PORT_STAT_HIGH_SPEED))
 310                                 /*
 311                                  * If the high-speed device has not switched
 312                                  * to full-speed idle before WKDISC_E has
 313                                  * effected, there will be a WKDISC event.
 314                                  */
 315                                 mdelay(4);
 316                         changed = 1;
 317                 }
 318         }
 319         spin_unlock_irq(&ehci->lock);
 320
 321         if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
 322                 /*
 323                  * Wait for HCD to enter low-power mode or for the bus
 324                  * to switch to full-speed idle.
 325                  */
 326                 usleep_range(5000, 5500);
 327         }
 328
 329         if (changed && ehci->has_tdi_phy_lpm) {
 330                 spin_lock_irq(&ehci->lock);
 331                 port = HCS_N_PORTS(ehci->hcs_params);
 332                 while (port--) {
 333                         u32 __iomem     *hostpc_reg = &ehci->regs->hostpc[port];
 334                         u32             t3;
 335
 336                         t3 = ehci_readl(ehci, hostpc_reg);
 337                         ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
 338                         t3 = ehci_readl(ehci, hostpc_reg);
 339                         ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
 340                                         port, (t3 & HOSTPC_PHCD) ?
 341                                         "succeeded" : "failed");
 342                 }
 343                 spin_unlock_irq(&ehci->lock);
 344         }
 345
 346         /* Apparently some devices need a >= 1-uframe delay here */
 347         if (ehci->bus_suspended)
 348                 udelay(150);
 349
 350         /* turn off now-idle HC */
 351         ehci_halt (ehci);
 352
 353         spin_lock_irq(&ehci->lock);
 354         if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
 355                 ehci_handle_controller_death(ehci);
 356         if (ehci->rh_state != EHCI_RH_RUNNING)
 357                 goto done;
 358         ehci->rh_state = EHCI_RH_SUSPENDED;
 359
 360         end_unlink_async(ehci);
 361         unlink_empty_async_suspended(ehci);
 362         ehci_handle_start_intr_unlinks(ehci);
 363         ehci_handle_intr_unlinks(ehci);
 364         end_free_itds(ehci);
 365
 366         /* allow remote wakeup */
 367         mask = INTR_MASK;
 368         if (!hcd->self.root_hub->do_remote_wakeup)
 369                 mask &= ~STS_PCD;
 370         ehci_writel(ehci, mask, &ehci->regs->intr_enable);
 371         ehci_readl(ehci, &ehci->regs->intr_enable);
 372
 373  done:
 374         ehci->next_statechange = jiffies + msecs_to_jiffies(10);
 375         ehci->enabled_hrtimer_events = 0;
 376         ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
 377         spin_unlock_irq (&ehci->lock);
 378
 379         hrtimer_cancel(&ehci->hrtimer);
 380         return 0;
 381 }
 382
 383
 384 /* caller has locked the root hub, and should reset/reinit on error */
 385 static int ehci_bus_resume (struct usb_hcd *hcd)
 386 {
 387         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
 388         u32                     temp;
 389         u32                     power_okay;
 390         int                     i;
 391         unsigned long           resume_needed = 0;
 392
 393         if (time_before (jiffies, ehci->next_statechange))
 394                 msleep(5);
 395         spin_lock_irq (&ehci->lock);
 396         if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
 397                 goto shutdown;
 398
 399         if (unlikely(ehci->debug)) {
 400                 if (!dbgp_reset_prep(hcd))
 401                         ehci->debug = NULL;
 402                 else
 403                         dbgp_external_startup(hcd);
 404         }
 405
 406         /* Ideally and we've got a real resume here, and no port's power
 407          * was lost.  (For PCI, that means Vaux was maintained.)  But we
 408          * could instead be restoring a swsusp snapshot -- so that BIOS was
 409          * the last user of the controller, not reset/pm hardware keeping
 410          * state we gave to it.
 411          */
 412         power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
 413         ehci_dbg(ehci, "resume root hub%s\n",
 414                         power_okay ? "" : " after power loss");
 415
 416         /* at least some APM implementations will try to deliver
 417          * IRQs right away, so delay them until we're ready.
 418          */
 419         ehci_writel(ehci, 0, &ehci->regs->intr_enable);
 420
 421         /* re-init operational registers */
 422         ehci_writel(ehci, 0, &ehci->regs->segment);
 423         ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
 424         ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
 425
 426         /* restore CMD_RUN, framelist size, and irq threshold */
 427         ehci->command |= CMD_RUN;
 428         ehci_writel(ehci, ehci->command, &ehci->regs->command);
 429         ehci->rh_state = EHCI_RH_RUNNING;
 430
 431         /*
 432          * According to Bugzilla #8190, the port status for some controllers
 433          * will be wrong without a delay. At their wrong status, the port
 434          * is enabled, but not suspended neither resumed.
 435          */
 436         i = HCS_N_PORTS(ehci->hcs_params);
 437         while (i--) {
 438                 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
 439                 if ((temp & PORT_PE) &&
 440                                 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
 441                         ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
 442                         spin_unlock_irq(&ehci->lock);
 443                         msleep(8);
 444                         spin_lock_irq(&ehci->lock);
 445                         break;
 446                 }
 447         }
 448
 449         if (ehci->shutdown)
 450                 goto shutdown;
 451
 452         /* clear phy low-power mode before resume */
 453         if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
 454                 i = HCS_N_PORTS(ehci->hcs_params);
 455                 while (i--) {
 456                         if (test_bit(i, &ehci->bus_suspended)) {
 457                                 u32 __iomem     *hostpc_reg =
 458                                                         &ehci->regs->hostpc[i];
 459
 460                                 temp = ehci_readl(ehci, hostpc_reg);
 461                                 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
 462                                                 hostpc_reg);
 463                         }
 464                 }
 465                 spin_unlock_irq(&ehci->lock);
 466                 msleep(5);
 467                 spin_lock_irq(&ehci->lock);
 468                 if (ehci->shutdown)
 469                         goto shutdown;
 470         }
 471
 472         /* manually resume the ports we suspended during bus_suspend() */
 473         i = HCS_N_PORTS (ehci->hcs_params);
 474         while (i--) {
 475                 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
 476                 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
 477                 if (test_bit(i, &ehci->bus_suspended) &&
 478                                 (temp & PORT_SUSPEND)) {
 479                         temp |= PORT_RESUME;
 480                         set_bit(i, &resume_needed);
 481                 }
 482                 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 483         }
 484
 485         /* msleep for 20ms only if code is trying to resume port */
 486         if (resume_needed) {
 487                 spin_unlock_irq(&ehci->lock);
 488                 msleep(20);
 489                 spin_lock_irq(&ehci->lock);
 490                 if (ehci->shutdown)
 491                         goto shutdown;
 492         }
 493
 494         i = HCS_N_PORTS (ehci->hcs_params);
 495         while (i--) {
 496                 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
 497                 if (test_bit(i, &resume_needed)) {
 498                         temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
 499                         ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 500                 }
 501         }
 502
 503         ehci->next_statechange = jiffies + msecs_to_jiffies(5);
 504         spin_unlock_irq(&ehci->lock);
 505
 506         ehci_handover_companion_ports(ehci);
 507
 508         /* Now we can safely re-enable irqs */
 509         spin_lock_irq(&ehci->lock);
 510         if (ehci->shutdown)
 511                 goto shutdown;
 512         ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
 513         (void) ehci_readl(ehci, &ehci->regs->intr_enable);
 514         spin_unlock_irq(&ehci->lock);
 515
 516         return 0;
 517
 518  shutdown:
 519         spin_unlock_irq(&ehci->lock);
 520         return -ESHUTDOWN;
 521 }
 522
 523 #else
 524
 525 #define ehci_bus_suspend        NULL
 526 #define ehci_bus_resume         NULL
 527
 528 #endif  /* CONFIG_PM */
 529
 530 /*-------------------------------------------------------------------------*/
 531
 532 /*
 533  * Sets the owner of a port
 534  */
 535 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
 536 {
 537         u32 __iomem             *status_reg;
 538         u32                     port_status;
 539         int                     try;
 540
 541         status_reg = &ehci->regs->port_status[portnum];
 542
 543         /*
 544          * The controller won't set the OWNER bit if the port is
 545          * enabled, so this loop will sometimes require at least two
 546          * iterations: one to disable the port and one to set OWNER.
 547          */
 548         for (try = 4; try > 0; --try) {
 549                 spin_lock_irq(&ehci->lock);
 550                 port_status = ehci_readl(ehci, status_reg);
 551                 if ((port_status & PORT_OWNER) == new_owner
 552                                 || (port_status & (PORT_OWNER | PORT_CONNECT))
 553                                         == 0)
 554                         try = 0;
 555                 else {
 556                         port_status ^= PORT_OWNER;
 557                         port_status &= ~(PORT_PE | PORT_RWC_BITS);
 558                         ehci_writel(ehci, port_status, status_reg);
 559                 }
 560                 spin_unlock_irq(&ehci->lock);
 561                 if (try > 1)
 562                         msleep(5);
 563         }
 564 }
 565
 566 /*-------------------------------------------------------------------------*/
 567
 568 static int check_reset_complete (
 569         struct ehci_hcd *ehci,
 570         int             index,
 571         u32 __iomem     *status_reg,
 572         int             port_status
 573 ) {
 574         if (!(port_status & PORT_CONNECT))
 575                 return port_status;
 576
 577         /* if reset finished and it's still not enabled -- handoff */
 578         if (!(port_status & PORT_PE)) {
 579
 580                 /* with integrated TT, there's nobody to hand it to! */
 581                 if (ehci_is_TDI(ehci)) {
 582                         ehci_dbg (ehci,
 583                                 "Failed to enable port %d on root hub TT\n",
 584                                 index+1);
 585                         return port_status;
 586                 }
 587
 588                 ehci_dbg (ehci, "port %d full speed --> companion\n",
 589                         index + 1);
 590
 591                 // what happens if HCS_N_CC(params) == 0 ?
 592                 port_status |= PORT_OWNER;
 593                 port_status &= ~PORT_RWC_BITS;
 594                 ehci_writel(ehci, port_status, status_reg);
 595
 596                 /* ensure 440EPX ohci controller state is operational */
 597                 if (ehci->has_amcc_usb23)
 598                         set_ohci_hcfs(ehci, 1);
 599         } else {
 600                 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
 601                         index + 1);
 602                 /* ensure 440EPx ohci controller state is suspended */
 603                 if (ehci->has_amcc_usb23)
 604                         set_ohci_hcfs(ehci, 0);
 605         }
 606
 607         return port_status;
 608 }
 609
 610 /*-------------------------------------------------------------------------*/
 611
 612
 613 /* build "status change" packet (one or two bytes) from HC registers */
 614
 615 static int
 616 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
 617 {
 618         struct ehci_hcd *ehci = hcd_to_ehci (hcd);
 619         u32             temp, status;
 620         u32             mask;
 621         int             ports, i, retval = 1;
 622         unsigned long   flags;
 623         u32             ppcd = ~0;
 624
 625         /* init status to no-changes */
 626         buf [0] = 0;
 627         ports = HCS_N_PORTS (ehci->hcs_params);
 628         if (ports > 7) {
 629                 buf [1] = 0;
 630                 retval++;
 631         }
 632
 633         /* Inform the core about resumes-in-progress by returning
 634          * a non-zero value even if there are no status changes.
 635          */
 636         status = ehci->resuming_ports;
 637
 638         /* Some boards (mostly VIA?) report bogus overcurrent indications,
 639          * causing massive log spam unless we completely ignore them.  It
 640          * may be relevant that VIA VT8235 controllers, where PORT_POWER is
 641          * always set, seem to clear PORT_OCC and PORT_CSC when writing to
 642          * PORT_POWER; that's surprising, but maybe within-spec.
 643          */
 644         if (!ignore_oc)
 645                 mask = PORT_CSC | PORT_PEC | PORT_OCC;
 646         else
 647                 mask = PORT_CSC | PORT_PEC;
 648         // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
 649
 650         /* no hub change reports (bit 0) for now (power, ...) */
 651
 652         /* port N changes (bit N)? */
 653         spin_lock_irqsave (&ehci->lock, flags);
 654
 655         /* get per-port change detect bits */
 656         if (ehci->has_ppcd)
 657                 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
 658
 659         for (i = 0; i < ports; i++) {
 660                 /* leverage per-port change bits feature */
 661                 if (ppcd & (1 << i))
 662                         temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
 663                 else
 664                         temp = 0;
 665
 666                 /*
 667                  * Return status information even for ports with OWNER set.
 668                  * Otherwise khubd wouldn't see the disconnect event when a
 669                  * high-speed device is switched over to the companion
 670                  * controller by the user.
 671                  */
 672
 673                 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
 674                                 || (ehci->reset_done[i] && time_after_eq(
 675                                         jiffies, ehci->reset_done[i]))) {
 676                         if (i < 7)
 677                             buf [0] |= 1 << (i + 1);
 678                         else
 679                             buf [1] |= 1 << (i - 7);
 680                         status = STS_PCD;
 681                 }
 682         }
 683
 684         /* If a resume is in progress, make sure it can finish */
 685         if (ehci->resuming_ports)
 686                 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
 687
 688         spin_unlock_irqrestore (&ehci->lock, flags);
 689         return status ? retval : 0;
 690 }
 691
 692 /*-------------------------------------------------------------------------*/
 693
 694 static void
 695 ehci_hub_descriptor (
 696         struct ehci_hcd                 *ehci,
 697         struct usb_hub_descriptor       *desc
 698 ) {
 699         int             ports = HCS_N_PORTS (ehci->hcs_params);
 700         u16             temp;
 701
 702         desc->bDescriptorType = 0x29;
 703         desc->bPwrOn2PwrGood = 10;      /* ehci 1.0, 2.3.9 says 20ms max */
 704         desc->bHubContrCurrent = 0;
 705
 706         desc->bNbrPorts = ports;
 707         temp = 1 + (ports / 8);
 708         desc->bDescLength = 7 + 2 * temp;
 709
 710         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
 711         memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
 712         memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
 713
 714         temp = 0x0008;                  /* per-port overcurrent reporting */
 715         if (HCS_PPC (ehci->hcs_params))
 716                 temp |= 0x0001;         /* per-port power control */
 717         else
 718                 temp |= 0x0002;         /* no power switching */
 719 #if 0
 720 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
 721         if (HCS_INDICATOR (ehci->hcs_params))
 722                 temp |= 0x0080;         /* per-port indicators (LEDs) */
 723 #endif
 724         desc->wHubCharacteristics = cpu_to_le16(temp);
 725 }
 726
 727 /*-------------------------------------------------------------------------*/
 728 #ifdef CONFIG_USB_HCD_TEST_MODE
 729
 730 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
 731
 732 static void usb_ehset_completion(struct urb *urb)
 733 {
 734         struct completion  *done = urb->context;
 735
 736         complete(done);
 737 }
 738 static int submit_single_step_set_feature(
 739         struct usb_hcd  *hcd,
 740         struct urb      *urb,
 741         int             is_setup
 742 );
 743
 744 /*
 745  * Allocate and initialize a control URB. This request will be used by the
 746  * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
 747  * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
 748  * Return NULL if failed.
 749  */
 750 static struct urb *request_single_step_set_feature_urb(
 751         struct usb_device       *udev,
 752         void                    *dr,
 753         void                    *buf,
 754         struct completion       *done
 755 ) {
 756         struct urb *urb;
 757         struct usb_hcd *hcd = bus_to_hcd(udev->bus);
 758         struct usb_host_endpoint *ep;
 759
 760         urb = usb_alloc_urb(0, GFP_KERNEL);
 761         if (!urb)
 762                 return NULL;
 763
 764         urb->pipe = usb_rcvctrlpipe(udev, 0);
 765         ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
 766                                 [usb_pipeendpoint(urb->pipe)];
 767         if (!ep) {
 768                 usb_free_urb(urb);
 769                 return NULL;
 770         }
 771
 772         urb->ep = ep;
 773         urb->dev = udev;
 774         urb->setup_packet = (void *)dr;
 775         urb->transfer_buffer = buf;
 776         urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
 777         urb->complete = usb_ehset_completion;
 778         urb->status = -EINPROGRESS;
 779         urb->actual_length = 0;
 780         urb->transfer_flags = URB_DIR_IN;
 781         usb_get_urb(urb);
 782         atomic_inc(&urb->use_count);
 783         atomic_inc(&urb->dev->urbnum);
 784         urb->setup_dma = dma_map_single(
 785                         hcd->self.controller,
 786                         urb->setup_packet,
 787                         sizeof(struct usb_ctrlrequest),
 788                         DMA_TO_DEVICE);
 789         urb->transfer_dma = dma_map_single(
 790                         hcd->self.controller,
 791                         urb->transfer_buffer,
 792                         urb->transfer_buffer_length,
 793                         DMA_FROM_DEVICE);
 794         urb->context = done;
 795         return urb;
 796 }
 797
 798 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
 799 {
 800         int retval = -ENOMEM;
 801         struct usb_ctrlrequest *dr;
 802         struct urb *urb;
 803         struct usb_device *udev;
 804         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 805         struct usb_device_descriptor *buf;
 806         DECLARE_COMPLETION_ONSTACK(done);
 807
 808         /* Obtain udev of the rhub's child port */
 809         udev = usb_hub_find_child(hcd->self.root_hub, port);
 810         if (!udev) {
 811                 ehci_err(ehci, "No device attached to the RootHub\n");
 812                 return -ENODEV;
 813         }
 814         buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
 815         if (!buf)
 816                 return -ENOMEM;
 817
 818         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
 819         if (!dr) {
 820                 kfree(buf);
 821                 return -ENOMEM;
 822         }
 823
 824         /* Fill Setup packet for GetDescriptor */
 825         dr->bRequestType = USB_DIR_IN;
 826         dr->bRequest = USB_REQ_GET_DESCRIPTOR;
 827         dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
 828         dr->wIndex = 0;
 829         dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
 830         urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
 831         if (!urb)
 832                 goto cleanup;
 833
 834         /* Submit just the SETUP stage */
 835         retval = submit_single_step_set_feature(hcd, urb, 1);
 836         if (retval)
 837                 goto out1;
 838         if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
 839                 usb_kill_urb(urb);
 840                 retval = -ETIMEDOUT;
 841                 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
 842                 goto out1;
 843         }
 844         msleep(15 * 1000);
 845
 846         /* Complete remaining DATA and STATUS stages using the same URB */
 847         urb->status = -EINPROGRESS;
 848         usb_get_urb(urb);
 849         atomic_inc(&urb->use_count);
 850         atomic_inc(&urb->dev->urbnum);
 851         retval = submit_single_step_set_feature(hcd, urb, 0);
 852         if (!retval && !wait_for_completion_timeout(&done,
 853                                                 msecs_to_jiffies(2000))) {
 854                 usb_kill_urb(urb);
 855                 retval = -ETIMEDOUT;
 856                 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
 857         }
 858 out1:
 859         usb_free_urb(urb);
 860 cleanup:
 861         kfree(dr);
 862         kfree(buf);
 863         return retval;
 864 }
 865 #endif /* CONFIG_USB_HCD_TEST_MODE */
 866 /*-------------------------------------------------------------------------*/
 867
 868 int ehci_hub_control(
 869         struct usb_hcd  *hcd,
 870         u16             typeReq,
 871         u16             wValue,
 872         u16             wIndex,
 873         char            *buf,
 874         u16             wLength
 875 ) {
 876         struct ehci_hcd *ehci = hcd_to_ehci (hcd);
 877         int             ports = HCS_N_PORTS (ehci->hcs_params);
 878         u32 __iomem     *status_reg = &ehci->regs->port_status[
 879                                 (wIndex & 0xff) - 1];
 880         u32 __iomem     *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
 881         u32             temp, temp1, status;
 882         unsigned long   flags;
 883         int             retval = 0;
 884         unsigned        selector;
 885
 886         /*
 887          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
 888          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
 889          * (track current state ourselves) ... blink for diagnostics,
 890          * power, "this is the one", etc.  EHCI spec supports this.
 891          */
 892
 893         spin_lock_irqsave (&ehci->lock, flags);
 894         switch (typeReq) {
 895         case ClearHubFeature:
 896                 switch (wValue) {
 897                 case C_HUB_LOCAL_POWER:
 898                 case C_HUB_OVER_CURRENT:
 899                         /* no hub-wide feature/status flags */
 900                         break;
 901                 default:
 902                         goto error;
 903                 }
 904                 break;
 905         case ClearPortFeature:
 906                 if (!wIndex || wIndex > ports)
 907                         goto error;
 908                 wIndex--;
 909                 temp = ehci_readl(ehci, status_reg);
 910                 temp &= ~PORT_RWC_BITS;
 911
 912                 /*
 913                  * Even if OWNER is set, so the port is owned by the
 914                  * companion controller, khubd needs to be able to clear
 915                  * the port-change status bits (especially
 916                  * USB_PORT_STAT_C_CONNECTION).
 917                  */
 918
 919                 switch (wValue) {
 920                 case USB_PORT_FEAT_ENABLE:
 921                         ehci_writel(ehci, temp & ~PORT_PE, status_reg);
 922                         break;
 923                 case USB_PORT_FEAT_C_ENABLE:
 924                         ehci_writel(ehci, temp | PORT_PEC, status_reg);
 925                         break;
 926                 case USB_PORT_FEAT_SUSPEND:
 927                         if (temp & PORT_RESET)
 928                                 goto error;
 929                         if (ehci->no_selective_suspend)
 930                                 break;
 931 #ifdef CONFIG_USB_OTG
 932                         if ((hcd->self.otg_port == (wIndex + 1))
 933                             && hcd->self.b_hnp_enable) {
 934                                 otg_start_hnp(hcd->phy->otg);
 935                                 break;
 936                         }
 937 #endif
 938                         if (!(temp & PORT_SUSPEND))
 939                                 break;
 940                         if ((temp & PORT_PE) == 0)
 941                                 goto error;
 942
 943                         /* clear phy low-power mode before resume */
 944                         if (ehci->has_tdi_phy_lpm) {
 945                                 temp1 = ehci_readl(ehci, hostpc_reg);
 946                                 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
 947                                                 hostpc_reg);
 948                                 spin_unlock_irqrestore(&ehci->lock, flags);
 949                                 msleep(5);/* wait to leave low-power mode */
 950                                 spin_lock_irqsave(&ehci->lock, flags);
 951                         }
 952                         /* resume signaling for 20 msec */
 953                         temp &= ~PORT_WAKE_BITS;
 954                         ehci_writel(ehci, temp | PORT_RESUME, status_reg);
 955                         ehci->reset_done[wIndex] = jiffies
 956                                         + msecs_to_jiffies(20);
 957                         set_bit(wIndex, &ehci->resuming_ports);
 958                         usb_hcd_start_port_resume(&hcd->self, wIndex);
 959                         break;
 960                 case USB_PORT_FEAT_C_SUSPEND:
 961                         clear_bit(wIndex, &ehci->port_c_suspend);
 962                         break;
 963                 case USB_PORT_FEAT_POWER:
 964                         if (HCS_PPC (ehci->hcs_params))
 965                                 ehci_writel(ehci, temp & ~PORT_POWER,
 966                                                 status_reg);
 967                         break;
 968                 case USB_PORT_FEAT_C_CONNECTION:
 969                         ehci_writel(ehci, temp | PORT_CSC, status_reg);
 970                         break;
 971                 case USB_PORT_FEAT_C_OVER_CURRENT:
 972                         ehci_writel(ehci, temp | PORT_OCC, status_reg);
 973                         break;
 974                 case USB_PORT_FEAT_C_RESET:
 975                         /* GetPortStatus clears reset */
 976                         break;
 977                 default:
 978                         goto error;
 979                 }
 980                 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
 981                 break;
 982         case GetHubDescriptor:
 983                 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
 984                         buf);
 985                 break;
 986         case GetHubStatus:
 987                 /* no hub-wide feature/status flags */
 988                 memset (buf, 0, 4);
 989                 //cpu_to_le32s ((u32 *) buf);
 990                 break;
 991         case GetPortStatus:
 992                 if (!wIndex || wIndex > ports)
 993                         goto error;
 994                 wIndex--;
 995                 status = 0;
 996                 temp = ehci_readl(ehci, status_reg);
 997
 998                 // wPortChange bits
 999                 if (temp & PORT_CSC)
1000                         status |= USB_PORT_STAT_C_CONNECTION << 16;
1001                 if (temp & PORT_PEC)
1002                         status |= USB_PORT_STAT_C_ENABLE << 16;
1003
1004                 if ((temp & PORT_OCC) && !ignore_oc){
1005                         status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1006
1007                         /*
1008                          * Hubs should disable port power on over-current.
1009                          * However, not all EHCI implementations do this
1010                          * automatically, even if they _do_ support per-port
1011                          * power switching; they're allowed to just limit the
1012                          * current.  khubd will turn the power back on.
1013                          */
1014                         if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1015                                         && HCS_PPC(ehci->hcs_params)) {
1016                                 ehci_writel(ehci,
1017                                         temp & ~(PORT_RWC_BITS | PORT_POWER),
1018                                         status_reg);
1019                                 temp = ehci_readl(ehci, status_reg);
1020                         }
1021                 }
1022
1023                 /* no reset or resume pending */
1024                 if (!ehci->reset_done[wIndex]) {
1025
1026                         /* Remote Wakeup received? */
1027                         if (temp & PORT_RESUME) {
1028                                 /* resume signaling for 20 msec */
1029                                 ehci->reset_done[wIndex] = jiffies
1030                                                 + msecs_to_jiffies(20);
1031                                 usb_hcd_start_port_resume(&hcd->self, wIndex);
1032                                 set_bit(wIndex, &ehci->resuming_ports);
1033                                 /* check the port again */
1034                                 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
1035                                                 ehci->reset_done[wIndex]);
1036                         }
1037
1038                 /* reset or resume not yet complete */
1039                 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
1040                         ;       /* wait until it is complete */
1041
1042                 /* resume completed */
1043                 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
1044                         clear_bit(wIndex, &ehci->suspended_ports);
1045                         set_bit(wIndex, &ehci->port_c_suspend);
1046                         ehci->reset_done[wIndex] = 0;
1047                         usb_hcd_end_port_resume(&hcd->self, wIndex);
1048
1049                         /* stop resume signaling */
1050                         temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
1051                         ehci_writel(ehci, temp, status_reg);
1052                         clear_bit(wIndex, &ehci->resuming_ports);
1053                         retval = ehci_handshake(ehci, status_reg,
1054                                         PORT_RESUME, 0, 2000 /* 2msec */);
1055                         if (retval != 0) {
1056                                 ehci_err(ehci, "port %d resume error %d\n",
1057                                                 wIndex + 1, retval);
1058                                 goto error;
1059                         }
1060                         temp = ehci_readl(ehci, status_reg);
1061
1062                 /* whoever resets must GetPortStatus to complete it!! */
1063                 } else {
1064                         status |= USB_PORT_STAT_C_RESET << 16;
1065                         ehci->reset_done [wIndex] = 0;
1066
1067                         /* force reset to complete */
1068                         ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
1069                                         status_reg);
1070                         /* REVISIT:  some hardware needs 550+ usec to clear
1071                          * this bit; seems too long to spin routinely...
1072                          */
1073                         retval = ehci_handshake(ehci, status_reg,
1074                                         PORT_RESET, 0, 1000);
1075                         if (retval != 0) {
1076                                 ehci_err (ehci, "port %d reset error %d\n",
1077                                         wIndex + 1, retval);
1078                                 goto error;
1079                         }
1080
1081                         /* see what we found out */
1082                         temp = check_reset_complete (ehci, wIndex, status_reg,
1083                                         ehci_readl(ehci, status_reg));
1084                 }
1085
1086                 /* transfer dedicated ports to the companion hc */
1087                 if ((temp & PORT_CONNECT) &&
1088                                 test_bit(wIndex, &ehci->companion_ports)) {
1089                         temp &= ~PORT_RWC_BITS;
1090                         temp |= PORT_OWNER;
1091                         ehci_writel(ehci, temp, status_reg);
1092                         ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
1093                         temp = ehci_readl(ehci, status_reg);
1094                 }
1095
1096                 /*
1097                  * Even if OWNER is set, there's no harm letting khubd
1098                  * see the wPortStatus values (they should all be 0 except
1099                  * for PORT_POWER anyway).
1100                  */
1101
1102                 if (temp & PORT_CONNECT) {
1103                         status |= USB_PORT_STAT_CONNECTION;
1104                         // status may be from integrated TT
1105                         if (ehci->has_hostpc) {
1106                                 temp1 = ehci_readl(ehci, hostpc_reg);
1107                                 status |= ehci_port_speed(ehci, temp1);
1108                         } else
1109                                 status |= ehci_port_speed(ehci, temp);
1110                 }
1111                 if (temp & PORT_PE)
1112                         status |= USB_PORT_STAT_ENABLE;
1113
1114                 /* maybe the port was unsuspended without our knowledge */
1115                 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
1116                         status |= USB_PORT_STAT_SUSPEND;
1117                 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1118                         clear_bit(wIndex, &ehci->suspended_ports);
1119                         clear_bit(wIndex, &ehci->resuming_ports);
1120                         ehci->reset_done[wIndex] = 0;
1121                         if (temp & PORT_PE)
1122                                 set_bit(wIndex, &ehci->port_c_suspend);
1123                         usb_hcd_end_port_resume(&hcd->self, wIndex);
1124                 }
1125
1126                 if (temp & PORT_OC)
1127                         status |= USB_PORT_STAT_OVERCURRENT;
1128                 if (temp & PORT_RESET)
1129                         status |= USB_PORT_STAT_RESET;
1130                 if (temp & PORT_POWER)
1131                         status |= USB_PORT_STAT_POWER;
1132                 if (test_bit(wIndex, &ehci->port_c_suspend))
1133                         status |= USB_PORT_STAT_C_SUSPEND << 16;
1134
1135                 if (status & ~0xffff)   /* only if wPortChange is interesting */
1136                         dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1137                 put_unaligned_le32(status, buf);
1138                 break;
1139         case SetHubFeature:
1140                 switch (wValue) {
1141                 case C_HUB_LOCAL_POWER:
1142                 case C_HUB_OVER_CURRENT:
1143                         /* no hub-wide feature/status flags */
1144                         break;
1145                 default:
1146                         goto error;
1147                 }
1148                 break;
1149         case SetPortFeature:
1150                 selector = wIndex >> 8;
1151                 wIndex &= 0xff;
1152                 if (unlikely(ehci->debug)) {
1153                         /* If the debug port is active any port
1154                          * feature requests should get denied */
1155                         if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1156                             (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1157                                 retval = -ENODEV;
1158                                 goto error_exit;
1159                         }
1160                 }
1161                 if (!wIndex || wIndex > ports)
1162                         goto error;
1163                 wIndex--;
1164                 temp = ehci_readl(ehci, status_reg);
1165                 if (temp & PORT_OWNER)
1166                         break;
1167
1168                 temp &= ~PORT_RWC_BITS;
1169                 switch (wValue) {
1170                 case USB_PORT_FEAT_SUSPEND:
1171                         if (ehci->no_selective_suspend)
1172                                 break;
1173                         if ((temp & PORT_PE) == 0
1174                                         || (temp & PORT_RESET) != 0)
1175                                 goto error;
1176
1177                         /* After above check the port must be connected.
1178                          * Set appropriate bit thus could put phy into low power
1179                          * mode if we have tdi_phy_lpm feature
1180                          */
1181                         temp &= ~PORT_WKCONN_E;
1182                         temp |= PORT_WKDISC_E | PORT_WKOC_E;
1183                         ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1184                         if (ehci->has_tdi_phy_lpm) {
1185                                 spin_unlock_irqrestore(&ehci->lock, flags);
1186                                 msleep(5);/* 5ms for HCD enter low pwr mode */
1187                                 spin_lock_irqsave(&ehci->lock, flags);
1188                                 temp1 = ehci_readl(ehci, hostpc_reg);
1189                                 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1190                                         hostpc_reg);
1191                                 temp1 = ehci_readl(ehci, hostpc_reg);
1192                                 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1193                                         wIndex, (temp1 & HOSTPC_PHCD) ?
1194                                         "succeeded" : "failed");
1195                         }
1196                         set_bit(wIndex, &ehci->suspended_ports);
1197                         break;
1198                 case USB_PORT_FEAT_POWER:
1199                         if (HCS_PPC (ehci->hcs_params))
1200                                 ehci_writel(ehci, temp | PORT_POWER,
1201                                                 status_reg);
1202                         break;
1203                 case USB_PORT_FEAT_RESET:
1204                         if (temp & (PORT_SUSPEND|PORT_RESUME))
1205                                 goto error;
1206                         /* line status bits may report this as low speed,
1207                          * which can be fine if this root hub has a
1208                          * transaction translator built in.
1209                          */
1210                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1211                                         && !ehci_is_TDI(ehci)
1212                                         && PORT_USB11 (temp)) {
1213                                 ehci_dbg (ehci,
1214                                         "port %d low speed --> companion\n",
1215                                         wIndex + 1);
1216                                 temp |= PORT_OWNER;
1217                         } else {
1218                                 temp |= PORT_RESET;
1219                                 temp &= ~PORT_PE;
1220
1221                                 /*
1222                                  * caller must wait, then call GetPortStatus
1223                                  * usb 2.0 spec says 50 ms resets on root
1224                                  */
1225                                 ehci->reset_done [wIndex] = jiffies
1226                                                 + msecs_to_jiffies (50);
1227                         }
1228                         ehci_writel(ehci, temp, status_reg);
1229                         break;
1230
1231                 /* For downstream facing ports (these):  one hub port is put
1232                  * into test mode according to USB2 11.24.2.13, then the hub
1233                  * must be reset (which for root hub now means rmmod+modprobe,
1234                  * or else system reboot).  See EHCI 2.3.9 and 4.14 for info
1235                  * about the EHCI-specific stuff.
1236                  */
1237                 case USB_PORT_FEAT_TEST:
1238 #ifdef CONFIG_USB_HCD_TEST_MODE
1239                         if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1240                                 spin_unlock_irqrestore(&ehci->lock, flags);
1241                                 retval = ehset_single_step_set_feature(hcd,
1242                                                                         wIndex);
1243                                 spin_lock_irqsave(&ehci->lock, flags);
1244                                 break;
1245                         }
1246 #endif
1247                         if (!selector || selector > 5)
1248                                 goto error;
1249                         spin_unlock_irqrestore(&ehci->lock, flags);
1250                         ehci_quiesce(ehci);
1251                         spin_lock_irqsave(&ehci->lock, flags);
1252
1253                         /* Put all enabled ports into suspend */
1254                         while (ports--) {
1255                                 u32 __iomem *sreg =
1256                                                 &ehci->regs->port_status[ports];
1257
1258                                 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1259                                 if (temp & PORT_PE)
1260                                         ehci_writel(ehci, temp | PORT_SUSPEND,
1261                                                         sreg);
1262                         }
1263
1264                         spin_unlock_irqrestore(&ehci->lock, flags);
1265                         ehci_halt(ehci);
1266                         spin_lock_irqsave(&ehci->lock, flags);
1267
1268                         temp = ehci_readl(ehci, status_reg);
1269                         temp |= selector << 16;
1270                         ehci_writel(ehci, temp, status_reg);
1271                         break;
1272
1273                 default:
1274                         goto error;
1275                 }
1276                 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1277                 break;
1278
1279         default:
1280 error:
1281                 /* "stall" on error */
1282                 retval = -EPIPE;
1283         }
1284 error_exit:
1285         spin_unlock_irqrestore (&ehci->lock, flags);
1286         return retval;
1287 }
1288 EXPORT_SYMBOL_GPL(ehci_hub_control);
1289
1290 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1291 {
1292         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1293
1294         if (ehci_is_TDI(ehci))
1295                 return;
1296         set_owner(ehci, --portnum, PORT_OWNER);
1297 }
1298
1299 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1300 {
1301         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1302         u32 __iomem             *reg;
1303
1304         if (ehci_is_TDI(ehci))
1305                 return 0;
1306         reg = &ehci->regs->port_status[portnum - 1];
1307         return ehci_readl(ehci, reg) & PORT_OWNER;
1308 }