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_fsl_susp_errata(ehci))
 314                 /*
 315                  * Wait for at least 10 millisecondes to ensure the controller
 316                  * enter the suspend status before initiating a port resume
 317                  * using the Force Port Resume bit (Not-EHCI compatible).
 318                  */
 319                 usleep_range(10000, 20000);
 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         unlink_empty_async_suspended(ehci);
 361
 362         /* Any IAA cycle that started before the suspend is now invalid */
 363         end_iaa_cycle(ehci);
 364         ehci_handle_start_intr_unlinks(ehci);
 365         ehci_handle_intr_unlinks(ehci);
 366         end_free_itds(ehci);
 367
 368         /* allow remote wakeup */
 369         mask = INTR_MASK;
 370         if (!hcd->self.root_hub->do_remote_wakeup)
 371                 mask &= ~STS_PCD;
 372         ehci_writel(ehci, mask, &ehci->regs->intr_enable);
 373         ehci_readl(ehci, &ehci->regs->intr_enable);
 374
 375  done:
 376         ehci->next_statechange = jiffies + msecs_to_jiffies(10);
 377         ehci->enabled_hrtimer_events = 0;
 378         ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
 379         spin_unlock_irq (&ehci->lock);
 380
 381         hrtimer_cancel(&ehci->hrtimer);
 382         return 0;
 383 }
 384
 385
 386 /* caller has locked the root hub, and should reset/reinit on error */
 387 static int ehci_bus_resume (struct usb_hcd *hcd)
 388 {
 389         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
 390         u32                     temp;
 391         u32                     power_okay;
 392         int                     i;
 393         unsigned long           resume_needed = 0;
 394
 395         if (time_before (jiffies, ehci->next_statechange))
 396                 msleep(5);
 397         spin_lock_irq (&ehci->lock);
 398         if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
 399                 goto shutdown;
 400
 401         if (unlikely(ehci->debug)) {
 402                 if (!dbgp_reset_prep(hcd))
 403                         ehci->debug = NULL;
 404                 else
 405                         dbgp_external_startup(hcd);
 406         }
 407
 408         /* Ideally and we've got a real resume here, and no port's power
 409          * was lost.  (For PCI, that means Vaux was maintained.)  But we
 410          * could instead be restoring a swsusp snapshot -- so that BIOS was
 411          * the last user of the controller, not reset/pm hardware keeping
 412          * state we gave to it.
 413          */
 414         power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
 415         ehci_dbg(ehci, "resume root hub%s\n",
 416                         power_okay ? "" : " after power loss");
 417
 418         /* at least some APM implementations will try to deliver
 419          * IRQs right away, so delay them until we're ready.
 420          */
 421         ehci_writel(ehci, 0, &ehci->regs->intr_enable);
 422
 423         /* re-init operational registers */
 424         ehci_writel(ehci, 0, &ehci->regs->segment);
 425         ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
 426         ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
 427
 428         /* restore CMD_RUN, framelist size, and irq threshold */
 429         ehci->command |= CMD_RUN;
 430         ehci_writel(ehci, ehci->command, &ehci->regs->command);
 431         ehci->rh_state = EHCI_RH_RUNNING;
 432
 433         /*
 434          * According to Bugzilla #8190, the port status for some controllers
 435          * will be wrong without a delay. At their wrong status, the port
 436          * is enabled, but not suspended neither resumed.
 437          */
 438         i = HCS_N_PORTS(ehci->hcs_params);
 439         while (i--) {
 440                 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
 441                 if ((temp & PORT_PE) &&
 442                                 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
 443                         ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
 444                         spin_unlock_irq(&ehci->lock);
 445                         msleep(8);
 446                         spin_lock_irq(&ehci->lock);
 447                         break;
 448                 }
 449         }
 450
 451         if (ehci->shutdown)
 452                 goto shutdown;
 453
 454         /* clear phy low-power mode before resume */
 455         if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
 456                 i = HCS_N_PORTS(ehci->hcs_params);
 457                 while (i--) {
 458                         if (test_bit(i, &ehci->bus_suspended)) {
 459                                 u32 __iomem     *hostpc_reg =
 460                                                         &ehci->regs->hostpc[i];
 461
 462                                 temp = ehci_readl(ehci, hostpc_reg);
 463                                 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
 464                                                 hostpc_reg);
 465                         }
 466                 }
 467                 spin_unlock_irq(&ehci->lock);
 468                 msleep(5);
 469                 spin_lock_irq(&ehci->lock);
 470                 if (ehci->shutdown)
 471                         goto shutdown;
 472         }
 473
 474         /* manually resume the ports we suspended during bus_suspend() */
 475         i = HCS_N_PORTS (ehci->hcs_params);
 476         while (i--) {
 477                 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
 478                 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
 479                 if (test_bit(i, &ehci->bus_suspended) &&
 480                                 (temp & PORT_SUSPEND)) {
 481                         temp |= PORT_RESUME;
 482                         set_bit(i, &resume_needed);
 483                 }
 484                 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 485         }
 486
 487         /*
 488          * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
 489          * port
 490          */
 491         if (resume_needed) {
 492                 spin_unlock_irq(&ehci->lock);
 493                 msleep(USB_RESUME_TIMEOUT);
 494                 spin_lock_irq(&ehci->lock);
 495                 if (ehci->shutdown)
 496                         goto shutdown;
 497         }
 498
 499         i = HCS_N_PORTS (ehci->hcs_params);
 500         while (i--) {
 501                 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
 502                 if (test_bit(i, &resume_needed)) {
 503                         temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
 504                         ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 505                 }
 506         }
 507
 508         ehci->next_statechange = jiffies + msecs_to_jiffies(5);
 509         spin_unlock_irq(&ehci->lock);
 510
 511         ehci_handover_companion_ports(ehci);
 512
 513         /* Now we can safely re-enable irqs */
 514         spin_lock_irq(&ehci->lock);
 515         if (ehci->shutdown)
 516                 goto shutdown;
 517         ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
 518         (void) ehci_readl(ehci, &ehci->regs->intr_enable);
 519         spin_unlock_irq(&ehci->lock);
 520
 521         return 0;
 522
 523  shutdown:
 524         spin_unlock_irq(&ehci->lock);
 525         return -ESHUTDOWN;
 526 }
 527
 528 #else
 529
 530 #define ehci_bus_suspend        NULL
 531 #define ehci_bus_resume         NULL
 532
 533 #endif  /* CONFIG_PM */
 534
 535 /*-------------------------------------------------------------------------*/
 536
 537 /*
 538  * Sets the owner of a port
 539  */
 540 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
 541 {
 542         u32 __iomem             *status_reg;
 543         u32                     port_status;
 544         int                     try;
 545
 546         status_reg = &ehci->regs->port_status[portnum];
 547
 548         /*
 549          * The controller won't set the OWNER bit if the port is
 550          * enabled, so this loop will sometimes require at least two
 551          * iterations: one to disable the port and one to set OWNER.
 552          */
 553         for (try = 4; try > 0; --try) {
 554                 spin_lock_irq(&ehci->lock);
 555                 port_status = ehci_readl(ehci, status_reg);
 556                 if ((port_status & PORT_OWNER) == new_owner
 557                                 || (port_status & (PORT_OWNER | PORT_CONNECT))
 558                                         == 0)
 559                         try = 0;
 560                 else {
 561                         port_status ^= PORT_OWNER;
 562                         port_status &= ~(PORT_PE | PORT_RWC_BITS);
 563                         ehci_writel(ehci, port_status, status_reg);
 564                 }
 565                 spin_unlock_irq(&ehci->lock);
 566                 if (try > 1)
 567                         msleep(5);
 568         }
 569 }
 570
 571 /*-------------------------------------------------------------------------*/
 572
 573 static int check_reset_complete (
 574         struct ehci_hcd *ehci,
 575         int             index,
 576         u32 __iomem     *status_reg,
 577         int             port_status
 578 ) {
 579         if (!(port_status & PORT_CONNECT))
 580                 return port_status;
 581
 582         /* if reset finished and it's still not enabled -- handoff */
 583         if (!(port_status & PORT_PE)) {
 584
 585                 /* with integrated TT, there's nobody to hand it to! */
 586                 if (ehci_is_TDI(ehci)) {
 587                         ehci_dbg (ehci,
 588                                 "Failed to enable port %d on root hub TT\n",
 589                                 index+1);
 590                         return port_status;
 591                 }
 592
 593                 ehci_dbg (ehci, "port %d full speed --> companion\n",
 594                         index + 1);
 595
 596                 // what happens if HCS_N_CC(params) == 0 ?
 597                 port_status |= PORT_OWNER;
 598                 port_status &= ~PORT_RWC_BITS;
 599                 ehci_writel(ehci, port_status, status_reg);
 600
 601                 /* ensure 440EPX ohci controller state is operational */
 602                 if (ehci->has_amcc_usb23)
 603                         set_ohci_hcfs(ehci, 1);
 604         } else {
 605                 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
 606                         index + 1);
 607                 /* ensure 440EPx ohci controller state is suspended */
 608                 if (ehci->has_amcc_usb23)
 609                         set_ohci_hcfs(ehci, 0);
 610         }
 611
 612         return port_status;
 613 }
 614
 615 /*-------------------------------------------------------------------------*/
 616
 617
 618 /* build "status change" packet (one or two bytes) from HC registers */
 619
 620 static int
 621 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
 622 {
 623         struct ehci_hcd *ehci = hcd_to_ehci (hcd);
 624         u32             temp, status;
 625         u32             mask;
 626         int             ports, i, retval = 1;
 627         unsigned long   flags;
 628         u32             ppcd = ~0;
 629
 630         /* init status to no-changes */
 631         buf [0] = 0;
 632         ports = HCS_N_PORTS (ehci->hcs_params);
 633         if (ports > 7) {
 634                 buf [1] = 0;
 635                 retval++;
 636         }
 637
 638         /* Inform the core about resumes-in-progress by returning
 639          * a non-zero value even if there are no status changes.
 640          */
 641         status = ehci->resuming_ports;
 642
 643         /* Some boards (mostly VIA?) report bogus overcurrent indications,
 644          * causing massive log spam unless we completely ignore them.  It
 645          * may be relevant that VIA VT8235 controllers, where PORT_POWER is
 646          * always set, seem to clear PORT_OCC and PORT_CSC when writing to
 647          * PORT_POWER; that's surprising, but maybe within-spec.
 648          */
 649         if (!ignore_oc)
 650                 mask = PORT_CSC | PORT_PEC | PORT_OCC;
 651         else
 652                 mask = PORT_CSC | PORT_PEC;
 653         // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
 654
 655         /* no hub change reports (bit 0) for now (power, ...) */
 656
 657         /* port N changes (bit N)? */
 658         spin_lock_irqsave (&ehci->lock, flags);
 659
 660         /* get per-port change detect bits */
 661         if (ehci->has_ppcd)
 662                 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
 663
 664         for (i = 0; i < ports; i++) {
 665                 /* leverage per-port change bits feature */
 666                 if (ppcd & (1 << i))
 667                         temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
 668                 else
 669                         temp = 0;
 670
 671                 /*
 672                  * Return status information even for ports with OWNER set.
 673                  * Otherwise hub_wq wouldn't see the disconnect event when a
 674                  * high-speed device is switched over to the companion
 675                  * controller by the user.
 676                  */
 677
 678                 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
 679                                 || (ehci->reset_done[i] && time_after_eq(
 680                                         jiffies, ehci->reset_done[i]))) {
 681                         if (i < 7)
 682                             buf [0] |= 1 << (i + 1);
 683                         else
 684                             buf [1] |= 1 << (i - 7);
 685                         status = STS_PCD;
 686                 }
 687         }
 688
 689         /* If a resume is in progress, make sure it can finish */
 690         if (ehci->resuming_ports)
 691                 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
 692
 693         spin_unlock_irqrestore (&ehci->lock, flags);
 694         return status ? retval : 0;
 695 }
 696
 697 /*-------------------------------------------------------------------------*/
 698
 699 static void
 700 ehci_hub_descriptor (
 701         struct ehci_hcd                 *ehci,
 702         struct usb_hub_descriptor       *desc
 703 ) {
 704         int             ports = HCS_N_PORTS (ehci->hcs_params);
 705         u16             temp;
 706
 707         desc->bDescriptorType = USB_DT_HUB;
 708         desc->bPwrOn2PwrGood = 10;      /* ehci 1.0, 2.3.9 says 20ms max */
 709         desc->bHubContrCurrent = 0;
 710
 711         desc->bNbrPorts = ports;
 712         temp = 1 + (ports / 8);
 713         desc->bDescLength = 7 + 2 * temp;
 714
 715         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
 716         memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
 717         memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
 718
 719         temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
 720         if (HCS_PPC (ehci->hcs_params))
 721                 temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */
 722         else
 723                 temp |= HUB_CHAR_NO_LPSM; /* no power switching */
 724 #if 0
 725 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
 726         if (HCS_INDICATOR (ehci->hcs_params))
 727                 temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */
 728 #endif
 729         desc->wHubCharacteristics = cpu_to_le16(temp);
 730 }
 731
 732 /*-------------------------------------------------------------------------*/
 733 #ifdef CONFIG_USB_HCD_TEST_MODE
 734
 735 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
 736
 737 static void usb_ehset_completion(struct urb *urb)
 738 {
 739         struct completion  *done = urb->context;
 740
 741         complete(done);
 742 }
 743 static int submit_single_step_set_feature(
 744         struct usb_hcd  *hcd,
 745         struct urb      *urb,
 746         int             is_setup
 747 );
 748
 749 /*
 750  * Allocate and initialize a control URB. This request will be used by the
 751  * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
 752  * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
 753  * Return NULL if failed.
 754  */
 755 static struct urb *request_single_step_set_feature_urb(
 756         struct usb_device       *udev,
 757         void                    *dr,
 758         void                    *buf,
 759         struct completion       *done
 760 ) {
 761         struct urb *urb;
 762         struct usb_hcd *hcd = bus_to_hcd(udev->bus);
 763         struct usb_host_endpoint *ep;
 764
 765         urb = usb_alloc_urb(0, GFP_KERNEL);
 766         if (!urb)
 767                 return NULL;
 768
 769         urb->pipe = usb_rcvctrlpipe(udev, 0);
 770         ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
 771                                 [usb_pipeendpoint(urb->pipe)];
 772         if (!ep) {
 773                 usb_free_urb(urb);
 774                 return NULL;
 775         }
 776
 777         urb->ep = ep;
 778         urb->dev = udev;
 779         urb->setup_packet = (void *)dr;
 780         urb->transfer_buffer = buf;
 781         urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
 782         urb->complete = usb_ehset_completion;
 783         urb->status = -EINPROGRESS;
 784         urb->actual_length = 0;
 785         urb->transfer_flags = URB_DIR_IN;
 786         usb_get_urb(urb);
 787         atomic_inc(&urb->use_count);
 788         atomic_inc(&urb->dev->urbnum);
 789         urb->setup_dma = dma_map_single(
 790                         hcd->self.controller,
 791                         urb->setup_packet,
 792                         sizeof(struct usb_ctrlrequest),
 793                         DMA_TO_DEVICE);
 794         urb->transfer_dma = dma_map_single(
 795                         hcd->self.controller,
 796                         urb->transfer_buffer,
 797                         urb->transfer_buffer_length,
 798                         DMA_FROM_DEVICE);
 799         urb->context = done;
 800         return urb;
 801 }
 802
 803 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
 804 {
 805         int retval = -ENOMEM;
 806         struct usb_ctrlrequest *dr;
 807         struct urb *urb;
 808         struct usb_device *udev;
 809         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 810         struct usb_device_descriptor *buf;
 811         DECLARE_COMPLETION_ONSTACK(done);
 812
 813         /* Obtain udev of the rhub's child port */
 814         udev = usb_hub_find_child(hcd->self.root_hub, port);
 815         if (!udev) {
 816                 ehci_err(ehci, "No device attached to the RootHub\n");
 817                 return -ENODEV;
 818         }
 819         buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
 820         if (!buf)
 821                 return -ENOMEM;
 822
 823         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
 824         if (!dr) {
 825                 kfree(buf);
 826                 return -ENOMEM;
 827         }
 828
 829         /* Fill Setup packet for GetDescriptor */
 830         dr->bRequestType = USB_DIR_IN;
 831         dr->bRequest = USB_REQ_GET_DESCRIPTOR;
 832         dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
 833         dr->wIndex = 0;
 834         dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
 835         urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
 836         if (!urb)
 837                 goto cleanup;
 838
 839         /* Submit just the SETUP stage */
 840         retval = submit_single_step_set_feature(hcd, urb, 1);
 841         if (retval)
 842                 goto out1;
 843         if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
 844                 usb_kill_urb(urb);
 845                 retval = -ETIMEDOUT;
 846                 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
 847                 goto out1;
 848         }
 849         msleep(15 * 1000);
 850
 851         /* Complete remaining DATA and STATUS stages using the same URB */
 852         urb->status = -EINPROGRESS;
 853         usb_get_urb(urb);
 854         atomic_inc(&urb->use_count);
 855         atomic_inc(&urb->dev->urbnum);
 856         retval = submit_single_step_set_feature(hcd, urb, 0);
 857         if (!retval && !wait_for_completion_timeout(&done,
 858                                                 msecs_to_jiffies(2000))) {
 859                 usb_kill_urb(urb);
 860                 retval = -ETIMEDOUT;
 861                 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
 862         }
 863 out1:
 864         usb_free_urb(urb);
 865 cleanup:
 866         kfree(dr);
 867         kfree(buf);
 868         return retval;
 869 }
 870 #endif /* CONFIG_USB_HCD_TEST_MODE */
 871 /*-------------------------------------------------------------------------*/
 872
 873 int ehci_hub_control(
 874         struct usb_hcd  *hcd,
 875         u16             typeReq,
 876         u16             wValue,
 877         u16             wIndex,
 878         char            *buf,
 879         u16             wLength
 880 ) {
 881         struct ehci_hcd *ehci = hcd_to_ehci (hcd);
 882         int             ports = HCS_N_PORTS (ehci->hcs_params);
 883         u32 __iomem     *status_reg, *hostpc_reg;
 884         u32             temp, temp1, status;
 885         unsigned long   flags;
 886         int             retval = 0;
 887         unsigned        selector;
 888
 889         /*
 890          * Avoid underflow while calculating (wIndex & 0xff) - 1.
 891          * The compiler might deduce that wIndex can never be 0 and then
 892          * optimize away the tests for !wIndex below.
 893          */
 894         temp = wIndex & 0xff;
 895         temp -= (temp > 0);
 896         status_reg = &ehci->regs->port_status[temp];
 897         hostpc_reg = &ehci->regs->hostpc[temp];
 898
 899         /*
 900          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
 901          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
 902          * (track current state ourselves) ... blink for diagnostics,
 903          * power, "this is the one", etc.  EHCI spec supports this.
 904          */
 905
 906         spin_lock_irqsave (&ehci->lock, flags);
 907         switch (typeReq) {
 908         case ClearHubFeature:
 909                 switch (wValue) {
 910                 case C_HUB_LOCAL_POWER:
 911                 case C_HUB_OVER_CURRENT:
 912                         /* no hub-wide feature/status flags */
 913                         break;
 914                 default:
 915                         goto error;
 916                 }
 917                 break;
 918         case ClearPortFeature:
 919                 if (!wIndex || wIndex > ports)
 920                         goto error;
 921                 wIndex--;
 922                 temp = ehci_readl(ehci, status_reg);
 923                 temp &= ~PORT_RWC_BITS;
 924
 925                 /*
 926                  * Even if OWNER is set, so the port is owned by the
 927                  * companion controller, hub_wq needs to be able to clear
 928                  * the port-change status bits (especially
 929                  * USB_PORT_STAT_C_CONNECTION).
 930                  */
 931
 932                 switch (wValue) {
 933                 case USB_PORT_FEAT_ENABLE:
 934                         ehci_writel(ehci, temp & ~PORT_PE, status_reg);
 935                         break;
 936                 case USB_PORT_FEAT_C_ENABLE:
 937                         ehci_writel(ehci, temp | PORT_PEC, status_reg);
 938                         break;
 939                 case USB_PORT_FEAT_SUSPEND:
 940                         if (temp & PORT_RESET)
 941                                 goto error;
 942                         if (ehci->no_selective_suspend)
 943                                 break;
 944 #ifdef CONFIG_USB_OTG
 945                         if ((hcd->self.otg_port == (wIndex + 1))
 946                             && hcd->self.b_hnp_enable) {
 947                                 otg_start_hnp(hcd->usb_phy->otg);
 948                                 break;
 949                         }
 950 #endif
 951                         if (!(temp & PORT_SUSPEND))
 952                                 break;
 953                         if ((temp & PORT_PE) == 0)
 954                                 goto error;
 955
 956                         /* clear phy low-power mode before resume */
 957                         if (ehci->has_tdi_phy_lpm) {
 958                                 temp1 = ehci_readl(ehci, hostpc_reg);
 959                                 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
 960                                                 hostpc_reg);
 961                                 spin_unlock_irqrestore(&ehci->lock, flags);
 962                                 msleep(5);/* wait to leave low-power mode */
 963                                 spin_lock_irqsave(&ehci->lock, flags);
 964                         }
 965                         /* resume signaling for 20 msec */
 966                         temp &= ~PORT_WAKE_BITS;
 967                         ehci_writel(ehci, temp | PORT_RESUME, status_reg);
 968                         ehci->reset_done[wIndex] = jiffies
 969                                         + msecs_to_jiffies(USB_RESUME_TIMEOUT);
 970                         set_bit(wIndex, &ehci->resuming_ports);
 971                         usb_hcd_start_port_resume(&hcd->self, wIndex);
 972                         break;
 973                 case USB_PORT_FEAT_C_SUSPEND:
 974                         clear_bit(wIndex, &ehci->port_c_suspend);
 975                         break;
 976                 case USB_PORT_FEAT_POWER:
 977                         if (HCS_PPC(ehci->hcs_params)) {
 978                                 spin_unlock_irqrestore(&ehci->lock, flags);
 979                                 ehci_port_power(ehci, wIndex, false);
 980                                 spin_lock_irqsave(&ehci->lock, flags);
 981                         }
 982                         break;
 983                 case USB_PORT_FEAT_C_CONNECTION:
 984                         ehci_writel(ehci, temp | PORT_CSC, status_reg);
 985                         break;
 986                 case USB_PORT_FEAT_C_OVER_CURRENT:
 987                         ehci_writel(ehci, temp | PORT_OCC, status_reg);
 988                         break;
 989                 case USB_PORT_FEAT_C_RESET:
 990                         /* GetPortStatus clears reset */
 991                         break;
 992                 default:
 993                         goto error;
 994                 }
 995                 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
 996                 break;
 997         case GetHubDescriptor:
 998                 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
 999                         buf);
1000                 break;
1001         case GetHubStatus:
1002                 /* no hub-wide feature/status flags */
1003                 memset (buf, 0, 4);
1004                 //cpu_to_le32s ((u32 *) buf);
1005                 break;
1006         case GetPortStatus:
1007                 if (!wIndex || wIndex > ports)
1008                         goto error;
1009                 wIndex--;
1010                 status = 0;
1011                 temp = ehci_readl(ehci, status_reg);
1012
1013                 // wPortChange bits
1014                 if (temp & PORT_CSC)
1015                         status |= USB_PORT_STAT_C_CONNECTION << 16;
1016                 if (temp & PORT_PEC)
1017                         status |= USB_PORT_STAT_C_ENABLE << 16;
1018
1019                 if ((temp & PORT_OCC) && !ignore_oc){
1020                         status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1021
1022                         /*
1023                          * Hubs should disable port power on over-current.
1024                          * However, not all EHCI implementations do this
1025                          * automatically, even if they _do_ support per-port
1026                          * power switching; they're allowed to just limit the
1027                          * current.  hub_wq will turn the power back on.
1028                          */
1029                         if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1030                                         && HCS_PPC(ehci->hcs_params)) {
1031                                 spin_unlock_irqrestore(&ehci->lock, flags);
1032                                 ehci_port_power(ehci, wIndex, false);
1033                                 spin_lock_irqsave(&ehci->lock, flags);
1034                                 temp = ehci_readl(ehci, status_reg);
1035                         }
1036                 }
1037
1038                 /* no reset or resume pending */
1039                 if (!ehci->reset_done[wIndex]) {
1040
1041                         /* Remote Wakeup received? */
1042                         if (temp & PORT_RESUME) {
1043                                 /* resume signaling for 20 msec */
1044                                 ehci->reset_done[wIndex] = jiffies
1045                                                 + msecs_to_jiffies(20);
1046                                 usb_hcd_start_port_resume(&hcd->self, wIndex);
1047                                 set_bit(wIndex, &ehci->resuming_ports);
1048                                 /* check the port again */
1049                                 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
1050                                                 ehci->reset_done[wIndex]);
1051                         }
1052
1053                 /* reset or resume not yet complete */
1054                 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
1055                         ;       /* wait until it is complete */
1056
1057                 /* resume completed */
1058                 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
1059                         clear_bit(wIndex, &ehci->suspended_ports);
1060                         set_bit(wIndex, &ehci->port_c_suspend);
1061                         ehci->reset_done[wIndex] = 0;
1062                         usb_hcd_end_port_resume(&hcd->self, wIndex);
1063
1064                         /* stop resume signaling */
1065                         temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
1066                         ehci_writel(ehci, temp, status_reg);
1067                         clear_bit(wIndex, &ehci->resuming_ports);
1068                         retval = ehci_handshake(ehci, status_reg,
1069                                         PORT_RESUME, 0, 2000 /* 2msec */);
1070                         if (retval != 0) {
1071                                 ehci_err(ehci, "port %d resume error %d\n",
1072                                                 wIndex + 1, retval);
1073                                 goto error;
1074                         }
1075                         temp = ehci_readl(ehci, status_reg);
1076
1077                 /* whoever resets must GetPortStatus to complete it!! */
1078                 } else {
1079                         status |= USB_PORT_STAT_C_RESET << 16;
1080                         ehci->reset_done [wIndex] = 0;
1081
1082                         /* force reset to complete */
1083                         ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
1084                                         status_reg);
1085                         /* REVISIT:  some hardware needs 550+ usec to clear
1086                          * this bit; seems too long to spin routinely...
1087                          */
1088                         retval = ehci_handshake(ehci, status_reg,
1089                                         PORT_RESET, 0, 1000);
1090                         if (retval != 0) {
1091                                 ehci_err (ehci, "port %d reset error %d\n",
1092                                         wIndex + 1, retval);
1093                                 goto error;
1094                         }
1095
1096                         /* see what we found out */
1097                         temp = check_reset_complete (ehci, wIndex, status_reg,
1098                                         ehci_readl(ehci, status_reg));
1099                 }
1100
1101                 /* transfer dedicated ports to the companion hc */
1102                 if ((temp & PORT_CONNECT) &&
1103                                 test_bit(wIndex, &ehci->companion_ports)) {
1104                         temp &= ~PORT_RWC_BITS;
1105                         temp |= PORT_OWNER;
1106                         ehci_writel(ehci, temp, status_reg);
1107                         ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
1108                         temp = ehci_readl(ehci, status_reg);
1109                 }
1110
1111                 /*
1112                  * Even if OWNER is set, there's no harm letting hub_wq
1113                  * see the wPortStatus values (they should all be 0 except
1114                  * for PORT_POWER anyway).
1115                  */
1116
1117                 if (temp & PORT_CONNECT) {
1118                         status |= USB_PORT_STAT_CONNECTION;
1119                         // status may be from integrated TT
1120                         if (ehci->has_hostpc) {
1121                                 temp1 = ehci_readl(ehci, hostpc_reg);
1122                                 status |= ehci_port_speed(ehci, temp1);
1123                         } else
1124                                 status |= ehci_port_speed(ehci, temp);
1125                 }
1126                 if (temp & PORT_PE)
1127                         status |= USB_PORT_STAT_ENABLE;
1128
1129                 /* maybe the port was unsuspended without our knowledge */
1130                 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
1131                         status |= USB_PORT_STAT_SUSPEND;
1132                 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1133                         clear_bit(wIndex, &ehci->suspended_ports);
1134                         clear_bit(wIndex, &ehci->resuming_ports);
1135                         ehci->reset_done[wIndex] = 0;
1136                         if (temp & PORT_PE)
1137                                 set_bit(wIndex, &ehci->port_c_suspend);
1138                         usb_hcd_end_port_resume(&hcd->self, wIndex);
1139                 }
1140
1141                 if (temp & PORT_OC)
1142                         status |= USB_PORT_STAT_OVERCURRENT;
1143                 if (temp & PORT_RESET)
1144                         status |= USB_PORT_STAT_RESET;
1145                 if (temp & PORT_POWER)
1146                         status |= USB_PORT_STAT_POWER;
1147                 if (test_bit(wIndex, &ehci->port_c_suspend))
1148                         status |= USB_PORT_STAT_C_SUSPEND << 16;
1149
1150                 if (status & ~0xffff)   /* only if wPortChange is interesting */
1151                         dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1152                 put_unaligned_le32(status, buf);
1153                 break;
1154         case SetHubFeature:
1155                 switch (wValue) {
1156                 case C_HUB_LOCAL_POWER:
1157                 case C_HUB_OVER_CURRENT:
1158                         /* no hub-wide feature/status flags */
1159                         break;
1160                 default:
1161                         goto error;
1162                 }
1163                 break;
1164         case SetPortFeature:
1165                 selector = wIndex >> 8;
1166                 wIndex &= 0xff;
1167                 if (unlikely(ehci->debug)) {
1168                         /* If the debug port is active any port
1169                          * feature requests should get denied */
1170                         if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1171                             (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1172                                 retval = -ENODEV;
1173                                 goto error_exit;
1174                         }
1175                 }
1176                 if (!wIndex || wIndex > ports)
1177                         goto error;
1178                 wIndex--;
1179                 temp = ehci_readl(ehci, status_reg);
1180                 if (temp & PORT_OWNER)
1181                         break;
1182
1183                 temp &= ~PORT_RWC_BITS;
1184                 switch (wValue) {
1185                 case USB_PORT_FEAT_SUSPEND:
1186                         if (ehci->no_selective_suspend)
1187                                 break;
1188                         if ((temp & PORT_PE) == 0
1189                                         || (temp & PORT_RESET) != 0)
1190                                 goto error;
1191
1192                         /* After above check the port must be connected.
1193                          * Set appropriate bit thus could put phy into low power
1194                          * mode if we have tdi_phy_lpm feature
1195                          */
1196                         temp &= ~PORT_WKCONN_E;
1197                         temp |= PORT_WKDISC_E | PORT_WKOC_E;
1198                         ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1199                         if (ehci->has_tdi_phy_lpm) {
1200                                 spin_unlock_irqrestore(&ehci->lock, flags);
1201                                 msleep(5);/* 5ms for HCD enter low pwr mode */
1202                                 spin_lock_irqsave(&ehci->lock, flags);
1203                                 temp1 = ehci_readl(ehci, hostpc_reg);
1204                                 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1205                                         hostpc_reg);
1206                                 temp1 = ehci_readl(ehci, hostpc_reg);
1207                                 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1208                                         wIndex, (temp1 & HOSTPC_PHCD) ?
1209                                         "succeeded" : "failed");
1210                         }
1211                         if (ehci_has_fsl_susp_errata(ehci)) {
1212                                 /* 10ms for HCD enter suspend */
1213                                 spin_unlock_irqrestore(&ehci->lock, flags);
1214                                 usleep_range(10000, 20000);
1215                                 spin_lock_irqsave(&ehci->lock, flags);
1216                         }
1217                         set_bit(wIndex, &ehci->suspended_ports);
1218                         break;
1219                 case USB_PORT_FEAT_POWER:
1220                         if (HCS_PPC(ehci->hcs_params)) {
1221                                 spin_unlock_irqrestore(&ehci->lock, flags);
1222                                 ehci_port_power(ehci, wIndex, true);
1223                                 spin_lock_irqsave(&ehci->lock, flags);
1224                         }
1225                         break;
1226                 case USB_PORT_FEAT_RESET:
1227                         if (temp & (PORT_SUSPEND|PORT_RESUME))
1228                                 goto error;
1229                         /* line status bits may report this as low speed,
1230                          * which can be fine if this root hub has a
1231                          * transaction translator built in.
1232                          */
1233                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1234                                         && !ehci_is_TDI(ehci)
1235                                         && PORT_USB11 (temp)) {
1236                                 ehci_dbg (ehci,
1237                                         "port %d low speed --> companion\n",
1238                                         wIndex + 1);
1239                                 temp |= PORT_OWNER;
1240                         } else {
1241                                 temp |= PORT_RESET;
1242                                 temp &= ~PORT_PE;
1243
1244                                 /*
1245                                  * caller must wait, then call GetPortStatus
1246                                  * usb 2.0 spec says 50 ms resets on root
1247                                  */
1248                                 ehci->reset_done [wIndex] = jiffies
1249                                                 + msecs_to_jiffies (50);
1250
1251                                 /*
1252                                  * Force full-speed connect for FSL high-speed
1253                                  * erratum; disable HS Chirp by setting PFSC bit
1254                                  */
1255                                 if (ehci_has_fsl_hs_errata(ehci))
1256                                         temp |= (1 << PORTSC_FSL_PFSC);
1257                         }
1258                         ehci_writel(ehci, temp, status_reg);
1259                         break;
1260
1261                 /* For downstream facing ports (these):  one hub port is put
1262                  * into test mode according to USB2 11.24.2.13, then the hub
1263                  * must be reset (which for root hub now means rmmod+modprobe,
1264                  * or else system reboot).  See EHCI 2.3.9 and 4.14 for info
1265                  * about the EHCI-specific stuff.
1266                  */
1267                 case USB_PORT_FEAT_TEST:
1268 #ifdef CONFIG_USB_HCD_TEST_MODE
1269                         if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1270                                 spin_unlock_irqrestore(&ehci->lock, flags);
1271                                 retval = ehset_single_step_set_feature(hcd,
1272                                                                 wIndex + 1);
1273                                 spin_lock_irqsave(&ehci->lock, flags);
1274                                 break;
1275                         }
1276 #endif
1277                         if (!selector || selector > 5)
1278                                 goto error;
1279                         spin_unlock_irqrestore(&ehci->lock, flags);
1280                         ehci_quiesce(ehci);
1281                         spin_lock_irqsave(&ehci->lock, flags);
1282
1283                         /* Put all enabled ports into suspend */
1284                         while (ports--) {
1285                                 u32 __iomem *sreg =
1286                                                 &ehci->regs->port_status[ports];
1287
1288                                 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1289                                 if (temp & PORT_PE)
1290                                         ehci_writel(ehci, temp | PORT_SUSPEND,
1291                                                         sreg);
1292                         }
1293
1294                         spin_unlock_irqrestore(&ehci->lock, flags);
1295                         ehci_halt(ehci);
1296                         spin_lock_irqsave(&ehci->lock, flags);
1297
1298                         temp = ehci_readl(ehci, status_reg);
1299                         temp |= selector << 16;
1300                         ehci_writel(ehci, temp, status_reg);
1301                         break;
1302
1303                 default:
1304                         goto error;
1305                 }
1306                 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1307                 break;
1308
1309         default:
1310 error:
1311                 /* "stall" on error */
1312                 retval = -EPIPE;
1313         }
1314 error_exit:
1315         spin_unlock_irqrestore (&ehci->lock, flags);
1316         return retval;
1317 }
1318 EXPORT_SYMBOL_GPL(ehci_hub_control);
1319
1320 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1321 {
1322         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1323
1324         if (ehci_is_TDI(ehci))
1325                 return;
1326         set_owner(ehci, --portnum, PORT_OWNER);
1327 }
1328
1329 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1330 {
1331         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1332         u32 __iomem             *reg;
1333
1334         if (ehci_is_TDI(ehci))
1335                 return 0;
1336         reg = &ehci->regs->port_status[portnum - 1];
1337         return ehci_readl(ehci, reg) & PORT_OWNER;
1338 }
1339
1340 static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable)
1341 {
1342         struct usb_hcd *hcd = ehci_to_hcd(ehci);
1343         u32 __iomem *status_reg = &ehci->regs->port_status[portnum];
1344         u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
1345
1346         if (enable)
1347                 ehci_writel(ehci, temp | PORT_POWER, status_reg);
1348         else
1349                 ehci_writel(ehci, temp & ~PORT_POWER, status_reg);
1350
1351         if (hcd->driver->port_power)
1352                 hcd->driver->port_power(hcd, portnum, enable);
1353
1354         return 0;
1355 }