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 void unlink_empty_async_suspended(struct ehci_hcd *ehci);
  37
  38 static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
  39 {
  40         return !udev->maxchild && udev->persist_enabled &&
  41                 udev->bus->root_hub->speed < USB_SPEED_HIGH;
  42 }
  43
  44 /* After a power loss, ports that were owned by the companion must be
  45  * reset so that the companion can still own them.
  46  */
  47 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
  48 {
  49         u32 __iomem     *reg;
  50         u32             status;
  51         int             port;
  52         __le32          buf;
  53         struct usb_hcd  *hcd = ehci_to_hcd(ehci);
  54
  55         if (!ehci->owned_ports)
  56                 return;
  57
  58         /*
  59          * USB 1.1 devices are mostly HIDs, which don't need to persist across
  60          * suspends. If we ensure that none of our companion's devices have
  61          * persist_enabled (by looking through all USB 1.1 buses in the system),
  62          * we can skip this and avoid slowing resume down. Devices without
  63          * persist will just get reenumerated shortly after resume anyway.
  64          */
  65         if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
  66                 return;
  67
  68         /* Make sure the ports are powered */
  69         port = HCS_N_PORTS(ehci->hcs_params);
  70         while (port--) {
  71                 if (test_bit(port, &ehci->owned_ports)) {
  72                         reg = &ehci->regs->port_status[port];
  73                         status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
  74                         if (!(status & PORT_POWER))
  75                                 ehci_port_power(ehci, port, true);
  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 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 EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags);
 226
 227 static int ehci_bus_suspend (struct usb_hcd *hcd)
 228 {
 229         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
 230         int                     port;
 231         int                     mask;
 232         int                     changed;
 233         bool                    fs_idle_delay;
 234
 235         ehci_dbg(ehci, "suspend root hub\n");
 236
 237         if (time_before (jiffies, ehci->next_statechange))
 238                 msleep(5);
 239
 240         /* stop the schedules */
 241         ehci_quiesce(ehci);
 242
 243         spin_lock_irq (&ehci->lock);
 244         if (ehci->rh_state < EHCI_RH_RUNNING)
 245                 goto done;
 246
 247         /* Once the controller is stopped, port resumes that are already
 248          * in progress won't complete.  Hence if remote wakeup is enabled
 249          * for the root hub and any ports are in the middle of a resume or
 250          * remote wakeup, we must fail the suspend.
 251          */
 252         if (hcd->self.root_hub->do_remote_wakeup) {
 253                 if (ehci->resuming_ports) {
 254                         spin_unlock_irq(&ehci->lock);
 255                         ehci_dbg(ehci, "suspend failed because a port is resuming\n");
 256                         return -EBUSY;
 257                 }
 258         }
 259
 260         /* Unlike other USB host controller types, EHCI doesn't have
 261          * any notion of "global" or bus-wide suspend.  The driver has
 262          * to manually suspend all the active unsuspended ports, and
 263          * then manually resume them in the bus_resume() routine.
 264          */
 265         ehci->bus_suspended = 0;
 266         ehci->owned_ports = 0;
 267         changed = 0;
 268         fs_idle_delay = false;
 269         port = HCS_N_PORTS(ehci->hcs_params);
 270         while (port--) {
 271                 u32 __iomem     *reg = &ehci->regs->port_status [port];
 272                 u32             t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
 273                 u32             t2 = t1 & ~PORT_WAKE_BITS;
 274
 275                 /* keep track of which ports we suspend */
 276                 if (t1 & PORT_OWNER)
 277                         set_bit(port, &ehci->owned_ports);
 278                 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
 279                         t2 |= PORT_SUSPEND;
 280                         set_bit(port, &ehci->bus_suspended);
 281                 }
 282
 283                 /* enable remote wakeup on all ports, if told to do so */
 284                 if (hcd->self.root_hub->do_remote_wakeup) {
 285                         /* only enable appropriate wake bits, otherwise the
 286                          * hardware can not go phy low power mode. If a race
 287                          * condition happens here(connection change during bits
 288                          * set), the port change detection will finally fix it.
 289                          */
 290                         if (t1 & PORT_CONNECT)
 291                                 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
 292                         else
 293                                 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
 294                 }
 295
 296                 if (t1 != t2) {
 297                         /*
 298                          * On some controllers, Wake-On-Disconnect will
 299                          * generate false wakeup signals until the bus
 300                          * switches over to full-speed idle.  For their
 301                          * sake, add a delay if we need one.
 302                          */
 303                         if ((t2 & PORT_WKDISC_E) &&
 304                                         ehci_port_speed(ehci, t2) ==
 305                                                 USB_PORT_STAT_HIGH_SPEED)
 306                                 fs_idle_delay = true;
 307                         ehci_writel(ehci, t2, reg);
 308                         changed = 1;
 309                 }
 310         }
 311         spin_unlock_irq(&ehci->lock);
 312
 313         if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
 314                 /*
 315                  * Wait for HCD to enter low-power mode or for the bus
 316                  * to switch to full-speed idle.
 317                  */
 318                 usleep_range(5000, 5500);
 319         }
 320
 321         if (changed && ehci->has_tdi_phy_lpm) {
 322                 spin_lock_irq(&ehci->lock);
 323                 port = HCS_N_PORTS(ehci->hcs_params);
 324                 while (port--) {
 325                         u32 __iomem     *hostpc_reg = &ehci->regs->hostpc[port];
 326                         u32             t3;
 327
 328                         t3 = ehci_readl(ehci, hostpc_reg);
 329                         ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
 330                         t3 = ehci_readl(ehci, hostpc_reg);
 331                         ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
 332                                         port, (t3 & HOSTPC_PHCD) ?
 333                                         "succeeded" : "failed");
 334                 }
 335                 spin_unlock_irq(&ehci->lock);
 336         }
 337
 338         /* Apparently some devices need a >= 1-uframe delay here */
 339         if (ehci->bus_suspended)
 340                 udelay(150);
 341
 342         /* turn off now-idle HC */
 343         ehci_halt (ehci);
 344
 345         spin_lock_irq(&ehci->lock);
 346         if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
 347                 ehci_handle_controller_death(ehci);
 348         if (ehci->rh_state != EHCI_RH_RUNNING)
 349                 goto done;
 350         ehci->rh_state = EHCI_RH_SUSPENDED;
 351
 352         unlink_empty_async_suspended(ehci);
 353
 354         /* Any IAA cycle that started before the suspend is now invalid */
 355         end_iaa_cycle(ehci);
 356         ehci_handle_start_intr_unlinks(ehci);
 357         ehci_handle_intr_unlinks(ehci);
 358         end_free_itds(ehci);
 359
 360         /* allow remote wakeup */
 361         mask = INTR_MASK;
 362         if (!hcd->self.root_hub->do_remote_wakeup)
 363                 mask &= ~STS_PCD;
 364         ehci_writel(ehci, mask, &ehci->regs->intr_enable);
 365         ehci_readl(ehci, &ehci->regs->intr_enable);
 366
 367  done:
 368         ehci->next_statechange = jiffies + msecs_to_jiffies(10);
 369         ehci->enabled_hrtimer_events = 0;
 370         ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
 371         spin_unlock_irq (&ehci->lock);
 372
 373         hrtimer_cancel(&ehci->hrtimer);
 374         return 0;
 375 }
 376
 377
 378 /* caller has locked the root hub, and should reset/reinit on error */
 379 static int ehci_bus_resume (struct usb_hcd *hcd)
 380 {
 381         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
 382         u32                     temp;
 383         u32                     power_okay;
 384         int                     i;
 385         unsigned long           resume_needed = 0;
 386
 387         if (time_before (jiffies, ehci->next_statechange))
 388                 msleep(5);
 389         spin_lock_irq (&ehci->lock);
 390         if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
 391                 goto shutdown;
 392
 393         if (unlikely(ehci->debug)) {
 394                 if (!dbgp_reset_prep(hcd))
 395                         ehci->debug = NULL;
 396                 else
 397                         dbgp_external_startup(hcd);
 398         }
 399
 400         /* Ideally and we've got a real resume here, and no port's power
 401          * was lost.  (For PCI, that means Vaux was maintained.)  But we
 402          * could instead be restoring a swsusp snapshot -- so that BIOS was
 403          * the last user of the controller, not reset/pm hardware keeping
 404          * state we gave to it.
 405          */
 406         power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
 407         ehci_dbg(ehci, "resume root hub%s\n",
 408                         power_okay ? "" : " after power loss");
 409
 410         /* at least some APM implementations will try to deliver
 411          * IRQs right away, so delay them until we're ready.
 412          */
 413         ehci_writel(ehci, 0, &ehci->regs->intr_enable);
 414
 415         /* re-init operational registers */
 416         ehci_writel(ehci, 0, &ehci->regs->segment);
 417         ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
 418         ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
 419
 420         /* restore CMD_RUN, framelist size, and irq threshold */
 421         ehci->command |= CMD_RUN;
 422         ehci_writel(ehci, ehci->command, &ehci->regs->command);
 423         ehci->rh_state = EHCI_RH_RUNNING;
 424
 425         /*
 426          * According to Bugzilla #8190, the port status for some controllers
 427          * will be wrong without a delay. At their wrong status, the port
 428          * is enabled, but not suspended neither resumed.
 429          */
 430         i = HCS_N_PORTS(ehci->hcs_params);
 431         while (i--) {
 432                 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
 433                 if ((temp & PORT_PE) &&
 434                                 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
 435                         ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
 436                         spin_unlock_irq(&ehci->lock);
 437                         msleep(8);
 438                         spin_lock_irq(&ehci->lock);
 439                         break;
 440                 }
 441         }
 442
 443         if (ehci->shutdown)
 444                 goto shutdown;
 445
 446         /* clear phy low-power mode before resume */
 447         if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
 448                 i = HCS_N_PORTS(ehci->hcs_params);
 449                 while (i--) {
 450                         if (test_bit(i, &ehci->bus_suspended)) {
 451                                 u32 __iomem     *hostpc_reg =
 452                                                         &ehci->regs->hostpc[i];
 453
 454                                 temp = ehci_readl(ehci, hostpc_reg);
 455                                 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
 456                                                 hostpc_reg);
 457                         }
 458                 }
 459                 spin_unlock_irq(&ehci->lock);
 460                 msleep(5);
 461                 spin_lock_irq(&ehci->lock);
 462                 if (ehci->shutdown)
 463                         goto shutdown;
 464         }
 465
 466         /* manually resume the ports we suspended during bus_suspend() */
 467         i = HCS_N_PORTS (ehci->hcs_params);
 468         while (i--) {
 469                 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
 470                 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
 471                 if (test_bit(i, &ehci->bus_suspended) &&
 472                                 (temp & PORT_SUSPEND)) {
 473                         temp |= PORT_RESUME;
 474                         set_bit(i, &resume_needed);
 475                 }
 476                 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 477         }
 478
 479         /*
 480          * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
 481          * port
 482          */
 483         if (resume_needed) {
 484                 spin_unlock_irq(&ehci->lock);
 485                 msleep(USB_RESUME_TIMEOUT);
 486                 spin_lock_irq(&ehci->lock);
 487                 if (ehci->shutdown)
 488                         goto shutdown;
 489         }
 490
 491         i = HCS_N_PORTS (ehci->hcs_params);
 492         while (i--) {
 493                 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
 494                 if (test_bit(i, &resume_needed)) {
 495                         temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
 496                         ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 497                 }
 498         }
 499
 500         ehci->next_statechange = jiffies + msecs_to_jiffies(5);
 501         spin_unlock_irq(&ehci->lock);
 502
 503         ehci_handover_companion_ports(ehci);
 504
 505         /* Now we can safely re-enable irqs */
 506         spin_lock_irq(&ehci->lock);
 507         if (ehci->shutdown)
 508                 goto shutdown;
 509         ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
 510         (void) ehci_readl(ehci, &ehci->regs->intr_enable);
 511         spin_unlock_irq(&ehci->lock);
 512
 513         return 0;
 514
 515  shutdown:
 516         spin_unlock_irq(&ehci->lock);
 517         return -ESHUTDOWN;
 518 }
 519
 520 #else
 521
 522 #define ehci_bus_suspend        NULL
 523 #define ehci_bus_resume         NULL
 524
 525 #endif  /* CONFIG_PM */
 526
 527 /*-------------------------------------------------------------------------*/
 528
 529 /*
 530  * Sets the owner of a port
 531  */
 532 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
 533 {
 534         u32 __iomem             *status_reg;
 535         u32                     port_status;
 536         int                     try;
 537
 538         status_reg = &ehci->regs->port_status[portnum];
 539
 540         /*
 541          * The controller won't set the OWNER bit if the port is
 542          * enabled, so this loop will sometimes require at least two
 543          * iterations: one to disable the port and one to set OWNER.
 544          */
 545         for (try = 4; try > 0; --try) {
 546                 spin_lock_irq(&ehci->lock);
 547                 port_status = ehci_readl(ehci, status_reg);
 548                 if ((port_status & PORT_OWNER) == new_owner
 549                                 || (port_status & (PORT_OWNER | PORT_CONNECT))
 550                                         == 0)
 551                         try = 0;
 552                 else {
 553                         port_status ^= PORT_OWNER;
 554                         port_status &= ~(PORT_PE | PORT_RWC_BITS);
 555                         ehci_writel(ehci, port_status, status_reg);
 556                 }
 557                 spin_unlock_irq(&ehci->lock);
 558                 if (try > 1)
 559                         msleep(5);
 560         }
 561 }
 562
 563 /*-------------------------------------------------------------------------*/
 564
 565 static int check_reset_complete (
 566         struct ehci_hcd *ehci,
 567         int             index,
 568         u32 __iomem     *status_reg,
 569         int             port_status
 570 ) {
 571         if (!(port_status & PORT_CONNECT))
 572                 return port_status;
 573
 574         /* if reset finished and it's still not enabled -- handoff */
 575         if (!(port_status & PORT_PE)) {
 576
 577                 /* with integrated TT, there's nobody to hand it to! */
 578                 if (ehci_is_TDI(ehci)) {
 579                         ehci_dbg (ehci,
 580                                 "Failed to enable port %d on root hub TT\n",
 581                                 index+1);
 582                         return port_status;
 583                 }
 584
 585                 ehci_dbg (ehci, "port %d full speed --> companion\n",
 586                         index + 1);
 587
 588                 // what happens if HCS_N_CC(params) == 0 ?
 589                 port_status |= PORT_OWNER;
 590                 port_status &= ~PORT_RWC_BITS;
 591                 ehci_writel(ehci, port_status, status_reg);
 592
 593                 /* ensure 440EPX ohci controller state is operational */
 594                 if (ehci->has_amcc_usb23)
 595                         set_ohci_hcfs(ehci, 1);
 596         } else {
 597                 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
 598                         index + 1);
 599                 /* ensure 440EPx ohci controller state is suspended */
 600                 if (ehci->has_amcc_usb23)
 601                         set_ohci_hcfs(ehci, 0);
 602         }
 603
 604         return port_status;
 605 }
 606
 607 /*-------------------------------------------------------------------------*/
 608
 609
 610 /* build "status change" packet (one or two bytes) from HC registers */
 611
 612 static int
 613 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
 614 {
 615         struct ehci_hcd *ehci = hcd_to_ehci (hcd);
 616         u32             temp, status;
 617         u32             mask;
 618         int             ports, i, retval = 1;
 619         unsigned long   flags;
 620         u32             ppcd = ~0;
 621
 622         /* init status to no-changes */
 623         buf [0] = 0;
 624         ports = HCS_N_PORTS (ehci->hcs_params);
 625         if (ports > 7) {
 626                 buf [1] = 0;
 627                 retval++;
 628         }
 629
 630         /* Inform the core about resumes-in-progress by returning
 631          * a non-zero value even if there are no status changes.
 632          */
 633         status = ehci->resuming_ports;
 634
 635         /* Some boards (mostly VIA?) report bogus overcurrent indications,
 636          * causing massive log spam unless we completely ignore them.  It
 637          * may be relevant that VIA VT8235 controllers, where PORT_POWER is
 638          * always set, seem to clear PORT_OCC and PORT_CSC when writing to
 639          * PORT_POWER; that's surprising, but maybe within-spec.
 640          */
 641         if (!ignore_oc)
 642                 mask = PORT_CSC | PORT_PEC | PORT_OCC;
 643         else
 644                 mask = PORT_CSC | PORT_PEC;
 645         // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
 646
 647         /* no hub change reports (bit 0) for now (power, ...) */
 648
 649         /* port N changes (bit N)? */
 650         spin_lock_irqsave (&ehci->lock, flags);
 651
 652         /* get per-port change detect bits */
 653         if (ehci->has_ppcd)
 654                 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
 655
 656         for (i = 0; i < ports; i++) {
 657                 /* leverage per-port change bits feature */
 658                 if (ppcd & (1 << i))
 659                         temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
 660                 else
 661                         temp = 0;
 662
 663                 /*
 664                  * Return status information even for ports with OWNER set.
 665                  * Otherwise hub_wq wouldn't see the disconnect event when a
 666                  * high-speed device is switched over to the companion
 667                  * controller by the user.
 668                  */
 669
 670                 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
 671                                 || (ehci->reset_done[i] && time_after_eq(
 672                                         jiffies, ehci->reset_done[i]))) {
 673                         if (i < 7)
 674                             buf [0] |= 1 << (i + 1);
 675                         else
 676                             buf [1] |= 1 << (i - 7);
 677                         status = STS_PCD;
 678                 }
 679         }
 680
 681         /* If a resume is in progress, make sure it can finish */
 682         if (ehci->resuming_ports)
 683                 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
 684
 685         spin_unlock_irqrestore (&ehci->lock, flags);
 686         return status ? retval : 0;
 687 }
 688
 689 /*-------------------------------------------------------------------------*/
 690
 691 static void
 692 ehci_hub_descriptor (
 693         struct ehci_hcd                 *ehci,
 694         struct usb_hub_descriptor       *desc
 695 ) {
 696         int             ports = HCS_N_PORTS (ehci->hcs_params);
 697         u16             temp;
 698
 699         desc->bDescriptorType = USB_DT_HUB;
 700         desc->bPwrOn2PwrGood = 10;      /* ehci 1.0, 2.3.9 says 20ms max */
 701         desc->bHubContrCurrent = 0;
 702
 703         desc->bNbrPorts = ports;
 704         temp = 1 + (ports / 8);
 705         desc->bDescLength = 7 + 2 * temp;
 706
 707         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
 708         memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
 709         memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
 710
 711         temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
 712         if (HCS_PPC (ehci->hcs_params))
 713                 temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */
 714         else
 715                 temp |= HUB_CHAR_NO_LPSM; /* no power switching */
 716 #if 0
 717 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
 718         if (HCS_INDICATOR (ehci->hcs_params))
 719                 temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */
 720 #endif
 721         desc->wHubCharacteristics = cpu_to_le16(temp);
 722 }
 723
 724 /*-------------------------------------------------------------------------*/
 725 #ifdef CONFIG_USB_HCD_TEST_MODE
 726
 727 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
 728
 729 static void usb_ehset_completion(struct urb *urb)
 730 {
 731         struct completion  *done = urb->context;
 732
 733         complete(done);
 734 }
 735 static int submit_single_step_set_feature(
 736         struct usb_hcd  *hcd,
 737         struct urb      *urb,
 738         int             is_setup
 739 );
 740
 741 /*
 742  * Allocate and initialize a control URB. This request will be used by the
 743  * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
 744  * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
 745  * Return NULL if failed.
 746  */
 747 static struct urb *request_single_step_set_feature_urb(
 748         struct usb_device       *udev,
 749         void                    *dr,
 750         void                    *buf,
 751         struct completion       *done
 752 ) {
 753         struct urb *urb;
 754         struct usb_hcd *hcd = bus_to_hcd(udev->bus);
 755         struct usb_host_endpoint *ep;
 756
 757         urb = usb_alloc_urb(0, GFP_KERNEL);
 758         if (!urb)
 759                 return NULL;
 760
 761         urb->pipe = usb_rcvctrlpipe(udev, 0);
 762         ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
 763                                 [usb_pipeendpoint(urb->pipe)];
 764         if (!ep) {
 765                 usb_free_urb(urb);
 766                 return NULL;
 767         }
 768
 769         urb->ep = ep;
 770         urb->dev = udev;
 771         urb->setup_packet = (void *)dr;
 772         urb->transfer_buffer = buf;
 773         urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
 774         urb->complete = usb_ehset_completion;
 775         urb->status = -EINPROGRESS;
 776         urb->actual_length = 0;
 777         urb->transfer_flags = URB_DIR_IN;
 778         usb_get_urb(urb);
 779         atomic_inc(&urb->use_count);
 780         atomic_inc(&urb->dev->urbnum);
 781         urb->setup_dma = dma_map_single(
 782                         hcd->self.controller,
 783                         urb->setup_packet,
 784                         sizeof(struct usb_ctrlrequest),
 785                         DMA_TO_DEVICE);
 786         urb->transfer_dma = dma_map_single(
 787                         hcd->self.controller,
 788                         urb->transfer_buffer,
 789                         urb->transfer_buffer_length,
 790                         DMA_FROM_DEVICE);
 791         urb->context = done;
 792         return urb;
 793 }
 794
 795 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
 796 {
 797         int retval = -ENOMEM;
 798         struct usb_ctrlrequest *dr;
 799         struct urb *urb;
 800         struct usb_device *udev;
 801         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 802         struct usb_device_descriptor *buf;
 803         DECLARE_COMPLETION_ONSTACK(done);
 804
 805         /* Obtain udev of the rhub's child port */
 806         udev = usb_hub_find_child(hcd->self.root_hub, port);
 807         if (!udev) {
 808                 ehci_err(ehci, "No device attached to the RootHub\n");
 809                 return -ENODEV;
 810         }
 811         buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
 812         if (!buf)
 813                 return -ENOMEM;
 814
 815         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
 816         if (!dr) {
 817                 kfree(buf);
 818                 return -ENOMEM;
 819         }
 820
 821         /* Fill Setup packet for GetDescriptor */
 822         dr->bRequestType = USB_DIR_IN;
 823         dr->bRequest = USB_REQ_GET_DESCRIPTOR;
 824         dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
 825         dr->wIndex = 0;
 826         dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
 827         urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
 828         if (!urb)
 829                 goto cleanup;
 830
 831         /* Submit just the SETUP stage */
 832         retval = submit_single_step_set_feature(hcd, urb, 1);
 833         if (retval)
 834                 goto out1;
 835         if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
 836                 usb_kill_urb(urb);
 837                 retval = -ETIMEDOUT;
 838                 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
 839                 goto out1;
 840         }
 841         msleep(15 * 1000);
 842
 843         /* Complete remaining DATA and STATUS stages using the same URB */
 844         urb->status = -EINPROGRESS;
 845         usb_get_urb(urb);
 846         atomic_inc(&urb->use_count);
 847         atomic_inc(&urb->dev->urbnum);
 848         retval = submit_single_step_set_feature(hcd, urb, 0);
 849         if (!retval && !wait_for_completion_timeout(&done,
 850                                                 msecs_to_jiffies(2000))) {
 851                 usb_kill_urb(urb);
 852                 retval = -ETIMEDOUT;
 853                 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
 854         }
 855 out1:
 856         usb_free_urb(urb);
 857 cleanup:
 858         kfree(dr);
 859         kfree(buf);
 860         return retval;
 861 }
 862 #endif /* CONFIG_USB_HCD_TEST_MODE */
 863 /*-------------------------------------------------------------------------*/
 864
 865 int ehci_hub_control(
 866         struct usb_hcd  *hcd,
 867         u16             typeReq,
 868         u16             wValue,
 869         u16             wIndex,
 870         char            *buf,
 871         u16             wLength
 872 ) {
 873         struct ehci_hcd *ehci = hcd_to_ehci (hcd);
 874         int             ports = HCS_N_PORTS (ehci->hcs_params);
 875         u32 __iomem     *status_reg, *hostpc_reg;
 876         u32             temp, temp1, status;
 877         unsigned long   flags;
 878         int             retval = 0;
 879         unsigned        selector;
 880
 881         /*
 882          * Avoid underflow while calculating (wIndex & 0xff) - 1.
 883          * The compiler might deduce that wIndex can never be 0 and then
 884          * optimize away the tests for !wIndex below.
 885          */
 886         temp = wIndex & 0xff;
 887         temp -= (temp > 0);
 888         status_reg = &ehci->regs->port_status[temp];
 889         hostpc_reg = &ehci->regs->hostpc[temp];
 890
 891         /*
 892          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
 893          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
 894          * (track current state ourselves) ... blink for diagnostics,
 895          * power, "this is the one", etc.  EHCI spec supports this.
 896          */
 897
 898         spin_lock_irqsave (&ehci->lock, flags);
 899         switch (typeReq) {
 900         case ClearHubFeature:
 901                 switch (wValue) {
 902                 case C_HUB_LOCAL_POWER:
 903                 case C_HUB_OVER_CURRENT:
 904                         /* no hub-wide feature/status flags */
 905                         break;
 906                 default:
 907                         goto error;
 908                 }
 909                 break;
 910         case ClearPortFeature:
 911                 if (!wIndex || wIndex > ports)
 912                         goto error;
 913                 wIndex--;
 914                 temp = ehci_readl(ehci, status_reg);
 915                 temp &= ~PORT_RWC_BITS;
 916
 917                 /*
 918                  * Even if OWNER is set, so the port is owned by the
 919                  * companion controller, hub_wq needs to be able to clear
 920                  * the port-change status bits (especially
 921                  * USB_PORT_STAT_C_CONNECTION).
 922                  */
 923
 924                 switch (wValue) {
 925                 case USB_PORT_FEAT_ENABLE:
 926                         ehci_writel(ehci, temp & ~PORT_PE, status_reg);
 927                         break;
 928                 case USB_PORT_FEAT_C_ENABLE:
 929                         ehci_writel(ehci, temp | PORT_PEC, status_reg);
 930                         break;
 931                 case USB_PORT_FEAT_SUSPEND:
 932                         if (temp & PORT_RESET)
 933                                 goto error;
 934                         if (ehci->no_selective_suspend)
 935                                 break;
 936 #ifdef CONFIG_USB_OTG
 937                         if ((hcd->self.otg_port == (wIndex + 1))
 938                             && hcd->self.b_hnp_enable) {
 939                                 otg_start_hnp(hcd->usb_phy->otg);
 940                                 break;
 941                         }
 942 #endif
 943                         if (!(temp & PORT_SUSPEND))
 944                                 break;
 945                         if ((temp & PORT_PE) == 0)
 946                                 goto error;
 947
 948                         /* clear phy low-power mode before resume */
 949                         if (ehci->has_tdi_phy_lpm) {
 950                                 temp1 = ehci_readl(ehci, hostpc_reg);
 951                                 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
 952                                                 hostpc_reg);
 953                                 spin_unlock_irqrestore(&ehci->lock, flags);
 954                                 msleep(5);/* wait to leave low-power mode */
 955                                 spin_lock_irqsave(&ehci->lock, flags);
 956                         }
 957                         /* resume signaling for 20 msec */
 958                         temp &= ~PORT_WAKE_BITS;
 959                         ehci_writel(ehci, temp | PORT_RESUME, status_reg);
 960                         ehci->reset_done[wIndex] = jiffies
 961                                         + msecs_to_jiffies(USB_RESUME_TIMEOUT);
 962                         set_bit(wIndex, &ehci->resuming_ports);
 963                         usb_hcd_start_port_resume(&hcd->self, wIndex);
 964                         break;
 965                 case USB_PORT_FEAT_C_SUSPEND:
 966                         clear_bit(wIndex, &ehci->port_c_suspend);
 967                         break;
 968                 case USB_PORT_FEAT_POWER:
 969                         if (HCS_PPC(ehci->hcs_params)) {
 970                                 spin_unlock_irqrestore(&ehci->lock, flags);
 971                                 ehci_port_power(ehci, wIndex, false);
 972                                 spin_lock_irqsave(&ehci->lock, flags);
 973                         }
 974                         break;
 975                 case USB_PORT_FEAT_C_CONNECTION:
 976                         ehci_writel(ehci, temp | PORT_CSC, status_reg);
 977                         break;
 978                 case USB_PORT_FEAT_C_OVER_CURRENT:
 979                         ehci_writel(ehci, temp | PORT_OCC, status_reg);
 980                         break;
 981                 case USB_PORT_FEAT_C_RESET:
 982                         /* GetPortStatus clears reset */
 983                         break;
 984                 default:
 985                         goto error;
 986                 }
 987                 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
 988                 break;
 989         case GetHubDescriptor:
 990                 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
 991                         buf);
 992                 break;
 993         case GetHubStatus:
 994                 /* no hub-wide feature/status flags */
 995                 memset (buf, 0, 4);
 996                 //cpu_to_le32s ((u32 *) buf);
 997                 break;
 998         case GetPortStatus:
 999                 if (!wIndex || wIndex > ports)
1000                         goto error;
1001                 wIndex--;
1002                 status = 0;
1003                 temp = ehci_readl(ehci, status_reg);
1004
1005                 // wPortChange bits
1006                 if (temp & PORT_CSC)
1007                         status |= USB_PORT_STAT_C_CONNECTION << 16;
1008                 if (temp & PORT_PEC)
1009                         status |= USB_PORT_STAT_C_ENABLE << 16;
1010
1011                 if ((temp & PORT_OCC) && !ignore_oc){
1012                         status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1013
1014                         /*
1015                          * Hubs should disable port power on over-current.
1016                          * However, not all EHCI implementations do this
1017                          * automatically, even if they _do_ support per-port
1018                          * power switching; they're allowed to just limit the
1019                          * current.  hub_wq will turn the power back on.
1020                          */
1021                         if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1022                                         && HCS_PPC(ehci->hcs_params)) {
1023                                 spin_unlock_irqrestore(&ehci->lock, flags);
1024                                 ehci_port_power(ehci, wIndex, false);
1025                                 spin_lock_irqsave(&ehci->lock, flags);
1026                                 temp = ehci_readl(ehci, status_reg);
1027                         }
1028                 }
1029
1030                 /* no reset or resume pending */
1031                 if (!ehci->reset_done[wIndex]) {
1032
1033                         /* Remote Wakeup received? */
1034                         if (temp & PORT_RESUME) {
1035                                 /* resume signaling for 20 msec */
1036                                 ehci->reset_done[wIndex] = jiffies
1037                                                 + msecs_to_jiffies(20);
1038                                 usb_hcd_start_port_resume(&hcd->self, wIndex);
1039                                 set_bit(wIndex, &ehci->resuming_ports);
1040                                 /* check the port again */
1041                                 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
1042                                                 ehci->reset_done[wIndex]);
1043                         }
1044
1045                 /* reset or resume not yet complete */
1046                 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
1047                         ;       /* wait until it is complete */
1048
1049                 /* resume completed */
1050                 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
1051                         clear_bit(wIndex, &ehci->suspended_ports);
1052                         set_bit(wIndex, &ehci->port_c_suspend);
1053                         ehci->reset_done[wIndex] = 0;
1054                         usb_hcd_end_port_resume(&hcd->self, wIndex);
1055
1056                         /* stop resume signaling */
1057                         temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
1058                         ehci_writel(ehci, temp, status_reg);
1059                         clear_bit(wIndex, &ehci->resuming_ports);
1060                         retval = ehci_handshake(ehci, status_reg,
1061                                         PORT_RESUME, 0, 2000 /* 2msec */);
1062                         if (retval != 0) {
1063                                 ehci_err(ehci, "port %d resume error %d\n",
1064                                                 wIndex + 1, retval);
1065                                 goto error;
1066                         }
1067                         temp = ehci_readl(ehci, status_reg);
1068
1069                 /* whoever resets must GetPortStatus to complete it!! */
1070                 } else {
1071                         status |= USB_PORT_STAT_C_RESET << 16;
1072                         ehci->reset_done [wIndex] = 0;
1073
1074                         /* force reset to complete */
1075                         ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
1076                                         status_reg);
1077                         /* REVISIT:  some hardware needs 550+ usec to clear
1078                          * this bit; seems too long to spin routinely...
1079                          */
1080                         retval = ehci_handshake(ehci, status_reg,
1081                                         PORT_RESET, 0, 1000);
1082                         if (retval != 0) {
1083                                 ehci_err (ehci, "port %d reset error %d\n",
1084                                         wIndex + 1, retval);
1085                                 goto error;
1086                         }
1087
1088                         /* see what we found out */
1089                         temp = check_reset_complete (ehci, wIndex, status_reg,
1090                                         ehci_readl(ehci, status_reg));
1091                 }
1092
1093                 /* transfer dedicated ports to the companion hc */
1094                 if ((temp & PORT_CONNECT) &&
1095                                 test_bit(wIndex, &ehci->companion_ports)) {
1096                         temp &= ~PORT_RWC_BITS;
1097                         temp |= PORT_OWNER;
1098                         ehci_writel(ehci, temp, status_reg);
1099                         ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
1100                         temp = ehci_readl(ehci, status_reg);
1101                 }
1102
1103                 /*
1104                  * Even if OWNER is set, there's no harm letting hub_wq
1105                  * see the wPortStatus values (they should all be 0 except
1106                  * for PORT_POWER anyway).
1107                  */
1108
1109                 if (temp & PORT_CONNECT) {
1110                         status |= USB_PORT_STAT_CONNECTION;
1111                         // status may be from integrated TT
1112                         if (ehci->has_hostpc) {
1113                                 temp1 = ehci_readl(ehci, hostpc_reg);
1114                                 status |= ehci_port_speed(ehci, temp1);
1115                         } else
1116                                 status |= ehci_port_speed(ehci, temp);
1117                 }
1118                 if (temp & PORT_PE)
1119                         status |= USB_PORT_STAT_ENABLE;
1120
1121                 /* maybe the port was unsuspended without our knowledge */
1122                 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
1123                         status |= USB_PORT_STAT_SUSPEND;
1124                 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1125                         clear_bit(wIndex, &ehci->suspended_ports);
1126                         clear_bit(wIndex, &ehci->resuming_ports);
1127                         ehci->reset_done[wIndex] = 0;
1128                         if (temp & PORT_PE)
1129                                 set_bit(wIndex, &ehci->port_c_suspend);
1130                         usb_hcd_end_port_resume(&hcd->self, wIndex);
1131                 }
1132
1133                 if (temp & PORT_OC)
1134                         status |= USB_PORT_STAT_OVERCURRENT;
1135                 if (temp & PORT_RESET)
1136                         status |= USB_PORT_STAT_RESET;
1137                 if (temp & PORT_POWER)
1138                         status |= USB_PORT_STAT_POWER;
1139                 if (test_bit(wIndex, &ehci->port_c_suspend))
1140                         status |= USB_PORT_STAT_C_SUSPEND << 16;
1141
1142                 if (status & ~0xffff)   /* only if wPortChange is interesting */
1143                         dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1144                 put_unaligned_le32(status, buf);
1145                 break;
1146         case SetHubFeature:
1147                 switch (wValue) {
1148                 case C_HUB_LOCAL_POWER:
1149                 case C_HUB_OVER_CURRENT:
1150                         /* no hub-wide feature/status flags */
1151                         break;
1152                 default:
1153                         goto error;
1154                 }
1155                 break;
1156         case SetPortFeature:
1157                 selector = wIndex >> 8;
1158                 wIndex &= 0xff;
1159                 if (unlikely(ehci->debug)) {
1160                         /* If the debug port is active any port
1161                          * feature requests should get denied */
1162                         if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1163                             (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1164                                 retval = -ENODEV;
1165                                 goto error_exit;
1166                         }
1167                 }
1168                 if (!wIndex || wIndex > ports)
1169                         goto error;
1170                 wIndex--;
1171                 temp = ehci_readl(ehci, status_reg);
1172                 if (temp & PORT_OWNER)
1173                         break;
1174
1175                 temp &= ~PORT_RWC_BITS;
1176                 switch (wValue) {
1177                 case USB_PORT_FEAT_SUSPEND:
1178                         if (ehci->no_selective_suspend)
1179                                 break;
1180                         if ((temp & PORT_PE) == 0
1181                                         || (temp & PORT_RESET) != 0)
1182                                 goto error;
1183
1184                         /* After above check the port must be connected.
1185                          * Set appropriate bit thus could put phy into low power
1186                          * mode if we have tdi_phy_lpm feature
1187                          */
1188                         temp &= ~PORT_WKCONN_E;
1189                         temp |= PORT_WKDISC_E | PORT_WKOC_E;
1190                         ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1191                         if (ehci->has_tdi_phy_lpm) {
1192                                 spin_unlock_irqrestore(&ehci->lock, flags);
1193                                 msleep(5);/* 5ms for HCD enter low pwr mode */
1194                                 spin_lock_irqsave(&ehci->lock, flags);
1195                                 temp1 = ehci_readl(ehci, hostpc_reg);
1196                                 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1197                                         hostpc_reg);
1198                                 temp1 = ehci_readl(ehci, hostpc_reg);
1199                                 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1200                                         wIndex, (temp1 & HOSTPC_PHCD) ?
1201                                         "succeeded" : "failed");
1202                         }
1203                         set_bit(wIndex, &ehci->suspended_ports);
1204                         break;
1205                 case USB_PORT_FEAT_POWER:
1206                         if (HCS_PPC(ehci->hcs_params)) {
1207                                 spin_unlock_irqrestore(&ehci->lock, flags);
1208                                 ehci_port_power(ehci, wIndex, true);
1209                                 spin_lock_irqsave(&ehci->lock, flags);
1210                         }
1211                         break;
1212                 case USB_PORT_FEAT_RESET:
1213                         if (temp & (PORT_SUSPEND|PORT_RESUME))
1214                                 goto error;
1215                         /* line status bits may report this as low speed,
1216                          * which can be fine if this root hub has a
1217                          * transaction translator built in.
1218                          */
1219                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1220                                         && !ehci_is_TDI(ehci)
1221                                         && PORT_USB11 (temp)) {
1222                                 ehci_dbg (ehci,
1223                                         "port %d low speed --> companion\n",
1224                                         wIndex + 1);
1225                                 temp |= PORT_OWNER;
1226                         } else {
1227                                 temp |= PORT_RESET;
1228                                 temp &= ~PORT_PE;
1229
1230                                 /*
1231                                  * caller must wait, then call GetPortStatus
1232                                  * usb 2.0 spec says 50 ms resets on root
1233                                  */
1234                                 ehci->reset_done [wIndex] = jiffies
1235                                                 + msecs_to_jiffies (50);
1236
1237                                 /*
1238                                  * Force full-speed connect for FSL high-speed
1239                                  * erratum; disable HS Chirp by setting PFSC bit
1240                                  */
1241                                 if (ehci_has_fsl_hs_errata(ehci))
1242                                         temp |= (1 << PORTSC_FSL_PFSC);
1243                         }
1244                         ehci_writel(ehci, temp, status_reg);
1245                         break;
1246
1247                 /* For downstream facing ports (these):  one hub port is put
1248                  * into test mode according to USB2 11.24.2.13, then the hub
1249                  * must be reset (which for root hub now means rmmod+modprobe,
1250                  * or else system reboot).  See EHCI 2.3.9 and 4.14 for info
1251                  * about the EHCI-specific stuff.
1252                  */
1253                 case USB_PORT_FEAT_TEST:
1254 #ifdef CONFIG_USB_HCD_TEST_MODE
1255                         if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1256                                 spin_unlock_irqrestore(&ehci->lock, flags);
1257                                 retval = ehset_single_step_set_feature(hcd,
1258                                                                 wIndex + 1);
1259                                 spin_lock_irqsave(&ehci->lock, flags);
1260                                 break;
1261                         }
1262 #endif
1263                         if (!selector || selector > 5)
1264                                 goto error;
1265                         spin_unlock_irqrestore(&ehci->lock, flags);
1266                         ehci_quiesce(ehci);
1267                         spin_lock_irqsave(&ehci->lock, flags);
1268
1269                         /* Put all enabled ports into suspend */
1270                         while (ports--) {
1271                                 u32 __iomem *sreg =
1272                                                 &ehci->regs->port_status[ports];
1273
1274                                 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1275                                 if (temp & PORT_PE)
1276                                         ehci_writel(ehci, temp | PORT_SUSPEND,
1277                                                         sreg);
1278                         }
1279
1280                         spin_unlock_irqrestore(&ehci->lock, flags);
1281                         ehci_halt(ehci);
1282                         spin_lock_irqsave(&ehci->lock, flags);
1283
1284                         temp = ehci_readl(ehci, status_reg);
1285                         temp |= selector << 16;
1286                         ehci_writel(ehci, temp, status_reg);
1287                         break;
1288
1289                 default:
1290                         goto error;
1291                 }
1292                 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1293                 break;
1294
1295         default:
1296 error:
1297                 /* "stall" on error */
1298                 retval = -EPIPE;
1299         }
1300 error_exit:
1301         spin_unlock_irqrestore (&ehci->lock, flags);
1302         return retval;
1303 }
1304 EXPORT_SYMBOL_GPL(ehci_hub_control);
1305
1306 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1307 {
1308         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1309
1310         if (ehci_is_TDI(ehci))
1311                 return;
1312         set_owner(ehci, --portnum, PORT_OWNER);
1313 }
1314
1315 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1316 {
1317         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1318         u32 __iomem             *reg;
1319
1320         if (ehci_is_TDI(ehci))
1321                 return 0;
1322         reg = &ehci->regs->port_status[portnum - 1];
1323         return ehci_readl(ehci, reg) & PORT_OWNER;
1324 }
1325
1326 static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable)
1327 {
1328         struct usb_hcd *hcd = ehci_to_hcd(ehci);
1329         u32 __iomem *status_reg = &ehci->regs->port_status[portnum];
1330         u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
1331
1332         if (enable)
1333                 ehci_writel(ehci, temp | PORT_POWER, status_reg);
1334         else
1335                 ehci_writel(ehci, temp & ~PORT_POWER, status_reg);
1336
1337         if (hcd->driver->port_power)
1338                 hcd->driver->port_power(hcd, portnum, enable);
1339
1340         return 0;
1341 }