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
  31 #define PORT_WAKE_BITS  (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
  32
  33 #ifdef  CONFIG_PM
  34
  35 static void unlink_empty_async_suspended(struct ehci_hcd *ehci);
  36
  37 static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
  38 {
  39         return !udev->maxchild && udev->persist_enabled &&
  40                 udev->bus->root_hub->speed < USB_SPEED_HIGH;
  41 }
  42
  43 /* After a power loss, ports that were owned by the companion must be
  44  * reset so that the companion can still own them.
  45  */
  46 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
  47 {
  48         u32 __iomem     *reg;
  49         u32             status;
  50         int             port;
  51         __le32          buf;
  52         struct usb_hcd  *hcd = ehci_to_hcd(ehci);
  53
  54         if (!ehci->owned_ports)
  55                 return;
  56
  57         /*
  58          * USB 1.1 devices are mostly HIDs, which don't need to persist across
  59          * suspends. If we ensure that none of our companion's devices have
  60          * persist_enabled (by looking through all USB 1.1 buses in the system),
  61          * we can skip this and avoid slowing resume down. Devices without
  62          * persist will just get reenumerated shortly after resume anyway.
  63          */
  64         if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
  65                 return;
  66
  67         /* Make sure the ports are powered */
  68         port = HCS_N_PORTS(ehci->hcs_params);
  69         while (port--) {
  70                 if (test_bit(port, &ehci->owned_ports)) {
  71                         reg = &ehci->regs->port_status[port];
  72                         status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
  73                         if (!(status & PORT_POWER))
  74                                 ehci_port_power(ehci, port, true);
  75                 }
  76         }
  77
  78         /* Give the connections some time to appear */
  79         msleep(20);
  80
  81         spin_lock_irq(&ehci->lock);
  82         port = HCS_N_PORTS(ehci->hcs_params);
  83         while (port--) {
  84                 if (test_bit(port, &ehci->owned_ports)) {
  85                         reg = &ehci->regs->port_status[port];
  86                         status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
  87
  88                         /* Port already owned by companion? */
  89                         if (status & PORT_OWNER)
  90                                 clear_bit(port, &ehci->owned_ports);
  91                         else if (test_bit(port, &ehci->companion_ports))
  92                                 ehci_writel(ehci, status & ~PORT_PE, reg);
  93                         else {
  94                                 spin_unlock_irq(&ehci->lock);
  95                                 ehci_hub_control(hcd, SetPortFeature,
  96                                                 USB_PORT_FEAT_RESET, port + 1,
  97                                                 NULL, 0);
  98                                 spin_lock_irq(&ehci->lock);
  99                         }
 100                 }
 101         }
 102         spin_unlock_irq(&ehci->lock);
 103
 104         if (!ehci->owned_ports)
 105                 return;
 106         msleep(90);             /* Wait for resets to complete */
 107
 108         spin_lock_irq(&ehci->lock);
 109         port = HCS_N_PORTS(ehci->hcs_params);
 110         while (port--) {
 111                 if (test_bit(port, &ehci->owned_ports)) {
 112                         spin_unlock_irq(&ehci->lock);
 113                         ehci_hub_control(hcd, GetPortStatus,
 114                                         0, port + 1,
 115                                         (char *) &buf, sizeof(buf));
 116                         spin_lock_irq(&ehci->lock);
 117
 118                         /* The companion should now own the port,
 119                          * but if something went wrong the port must not
 120                          * remain enabled.
 121                          */
 122                         reg = &ehci->regs->port_status[port];
 123                         status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
 124                         if (status & PORT_OWNER)
 125                                 ehci_writel(ehci, status | PORT_CSC, reg);
 126                         else {
 127                                 ehci_dbg(ehci, "failed handover port %d: %x\n",
 128                                                 port + 1, status);
 129                                 ehci_writel(ehci, status & ~PORT_PE, reg);
 130                         }
 131                 }
 132         }
 133
 134         ehci->owned_ports = 0;
 135         spin_unlock_irq(&ehci->lock);
 136 }
 137
 138 static int ehci_port_change(struct ehci_hcd *ehci)
 139 {
 140         int i = HCS_N_PORTS(ehci->hcs_params);
 141
 142         /* First check if the controller indicates a change event */
 143
 144         if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
 145                 return 1;
 146
 147         /*
 148          * Not all controllers appear to update this while going from D3 to D0,
 149          * so check the individual port status registers as well
 150          */
 151
 152         while (i--)
 153                 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
 154                         return 1;
 155
 156         return 0;
 157 }
 158
 159 void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
 160                 bool suspending, bool do_wakeup)
 161 {
 162         int             port;
 163         u32             temp;
 164
 165         /* If remote wakeup is enabled for the root hub but disabled
 166          * for the controller, we must adjust all the port wakeup flags
 167          * when the controller is suspended or resumed.  In all other
 168          * cases they don't need to be changed.
 169          */
 170         if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
 171                 return;
 172
 173         spin_lock_irq(&ehci->lock);
 174
 175         /* clear phy low-power mode before changing wakeup flags */
 176         if (ehci->has_tdi_phy_lpm) {
 177                 port = HCS_N_PORTS(ehci->hcs_params);
 178                 while (port--) {
 179                         u32 __iomem     *hostpc_reg = &ehci->regs->hostpc[port];
 180
 181                         temp = ehci_readl(ehci, hostpc_reg);
 182                         ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
 183                 }
 184                 spin_unlock_irq(&ehci->lock);
 185                 msleep(5);
 186                 spin_lock_irq(&ehci->lock);
 187         }
 188
 189         port = HCS_N_PORTS(ehci->hcs_params);
 190         while (port--) {
 191                 u32 __iomem     *reg = &ehci->regs->port_status[port];
 192                 u32             t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
 193                 u32             t2 = t1 & ~PORT_WAKE_BITS;
 194
 195                 /* If we are suspending the controller, clear the flags.
 196                  * If we are resuming the controller, set the wakeup flags.
 197                  */
 198                 if (!suspending) {
 199                         if (t1 & PORT_CONNECT)
 200                                 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
 201                         else
 202                                 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
 203                 }
 204                 ehci_writel(ehci, t2, reg);
 205         }
 206
 207         /* enter phy low-power mode again */
 208         if (ehci->has_tdi_phy_lpm) {
 209                 port = HCS_N_PORTS(ehci->hcs_params);
 210                 while (port--) {
 211                         u32 __iomem     *hostpc_reg = &ehci->regs->hostpc[port];
 212
 213                         temp = ehci_readl(ehci, hostpc_reg);
 214                         ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
 215                 }
 216         }
 217
 218         /* Does the root hub have a port wakeup pending? */
 219         if (!suspending && ehci_port_change(ehci))
 220                 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
 221
 222         spin_unlock_irq(&ehci->lock);
 223 }
 224 EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags);
 225
 226 static int ehci_bus_suspend (struct usb_hcd *hcd)
 227 {
 228         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
 229         int                     port;
 230         int                     mask;
 231         int                     changed;
 232         bool                    fs_idle_delay;
 233
 234         ehci_dbg(ehci, "suspend root hub\n");
 235
 236         if (time_before (jiffies, ehci->next_statechange))
 237                 msleep(5);
 238
 239         /* stop the schedules */
 240         ehci_quiesce(ehci);
 241
 242         spin_lock_irq (&ehci->lock);
 243         if (ehci->rh_state < EHCI_RH_RUNNING)
 244                 goto done;
 245
 246         /* Once the controller is stopped, port resumes that are already
 247          * in progress won't complete.  Hence if remote wakeup is enabled
 248          * for the root hub and any ports are in the middle of a resume or
 249          * remote wakeup, we must fail the suspend.
 250          */
 251         if (hcd->self.root_hub->do_remote_wakeup) {
 252                 if (ehci->resuming_ports) {
 253                         spin_unlock_irq(&ehci->lock);
 254                         ehci_dbg(ehci, "suspend failed because a port is resuming\n");
 255                         return -EBUSY;
 256                 }
 257         }
 258
 259         /* Unlike other USB host controller types, EHCI doesn't have
 260          * any notion of "global" or bus-wide suspend.  The driver has
 261          * to manually suspend all the active unsuspended ports, and
 262          * then manually resume them in the bus_resume() routine.
 263          */
 264         ehci->bus_suspended = 0;
 265         ehci->owned_ports = 0;
 266         changed = 0;
 267         fs_idle_delay = false;
 268         port = HCS_N_PORTS(ehci->hcs_params);
 269         while (port--) {
 270                 u32 __iomem     *reg = &ehci->regs->port_status [port];
 271                 u32             t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
 272                 u32             t2 = t1 & ~PORT_WAKE_BITS;
 273
 274                 /* keep track of which ports we suspend */
 275                 if (t1 & PORT_OWNER)
 276                         set_bit(port, &ehci->owned_ports);
 277                 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
 278                         t2 |= PORT_SUSPEND;
 279                         set_bit(port, &ehci->bus_suspended);
 280                 }
 281
 282                 /* enable remote wakeup on all ports, if told to do so */
 283                 if (hcd->self.root_hub->do_remote_wakeup) {
 284                         /* only enable appropriate wake bits, otherwise the
 285                          * hardware can not go phy low power mode. If a race
 286                          * condition happens here(connection change during bits
 287                          * set), the port change detection will finally fix it.
 288                          */
 289                         if (t1 & PORT_CONNECT)
 290                                 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
 291                         else
 292                                 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
 293                 }
 294
 295                 if (t1 != t2) {
 296                         /*
 297                          * On some controllers, Wake-On-Disconnect will
 298                          * generate false wakeup signals until the bus
 299                          * switches over to full-speed idle.  For their
 300                          * sake, add a delay if we need one.
 301                          */
 302                         if ((t2 & PORT_WKDISC_E) &&
 303                                         ehci_port_speed(ehci, t2) ==
 304                                                 USB_PORT_STAT_HIGH_SPEED)
 305                                 fs_idle_delay = true;
 306                         ehci_writel(ehci, t2, reg);
 307                         changed = 1;
 308                 }
 309         }
 310         spin_unlock_irq(&ehci->lock);
 311
 312         if (changed && ehci_has_fsl_susp_errata(ehci))
 313                 /*
 314                  * Wait for at least 10 millisecondes to ensure the controller
 315                  * enter the suspend status before initiating a port resume
 316                  * using the Force Port Resume bit (Not-EHCI compatible).
 317                  */
 318                 usleep_range(10000, 20000);
 319
 320         if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
 321                 /*
 322                  * Wait for HCD to enter low-power mode or for the bus
 323                  * to switch to full-speed idle.
 324                  */
 325                 usleep_range(5000, 5500);
 326         }
 327
 328         if (changed && ehci->has_tdi_phy_lpm) {
 329                 spin_lock_irq(&ehci->lock);
 330                 port = HCS_N_PORTS(ehci->hcs_params);
 331                 while (port--) {
 332                         u32 __iomem     *hostpc_reg = &ehci->regs->hostpc[port];
 333                         u32             t3;
 334
 335                         t3 = ehci_readl(ehci, hostpc_reg);
 336                         ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
 337                         t3 = ehci_readl(ehci, hostpc_reg);
 338                         ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
 339                                         port, (t3 & HOSTPC_PHCD) ?
 340                                         "succeeded" : "failed");
 341                 }
 342                 spin_unlock_irq(&ehci->lock);
 343         }
 344
 345         /* Apparently some devices need a >= 1-uframe delay here */
 346         if (ehci->bus_suspended)
 347                 udelay(150);
 348
 349         /* turn off now-idle HC */
 350         ehci_halt (ehci);
 351
 352         spin_lock_irq(&ehci->lock);
 353         if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
 354                 ehci_handle_controller_death(ehci);
 355         if (ehci->rh_state != EHCI_RH_RUNNING)
 356                 goto done;
 357         ehci->rh_state = EHCI_RH_SUSPENDED;
 358
 359         unlink_empty_async_suspended(ehci);
 360
 361         /* Some Synopsys controllers mistakenly leave IAA turned on */
 362         ehci_writel(ehci, STS_IAA, &ehci->regs->status);
 363
 364         /* Any IAA cycle that started before the suspend is now invalid */
 365         end_iaa_cycle(ehci);
 366         ehci_handle_start_intr_unlinks(ehci);
 367         ehci_handle_intr_unlinks(ehci);
 368         end_free_itds(ehci);
 369
 370         /* allow remote wakeup */
 371         mask = INTR_MASK;
 372         if (!hcd->self.root_hub->do_remote_wakeup)
 373                 mask &= ~STS_PCD;
 374         ehci_writel(ehci, mask, &ehci->regs->intr_enable);
 375         ehci_readl(ehci, &ehci->regs->intr_enable);
 376
 377  done:
 378         ehci->next_statechange = jiffies + msecs_to_jiffies(10);
 379         ehci->enabled_hrtimer_events = 0;
 380         ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
 381         spin_unlock_irq (&ehci->lock);
 382
 383         hrtimer_cancel(&ehci->hrtimer);
 384         return 0;
 385 }
 386
 387
 388 /* caller has locked the root hub, and should reset/reinit on error */
 389 static int ehci_bus_resume (struct usb_hcd *hcd)
 390 {
 391         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
 392         u32                     temp;
 393         u32                     power_okay;
 394         int                     i;
 395         unsigned long           resume_needed = 0;
 396
 397         if (time_before (jiffies, ehci->next_statechange))
 398                 msleep(5);
 399         spin_lock_irq (&ehci->lock);
 400         if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
 401                 goto shutdown;
 402
 403         if (unlikely(ehci->debug)) {
 404                 if (!dbgp_reset_prep(hcd))
 405                         ehci->debug = NULL;
 406                 else
 407                         dbgp_external_startup(hcd);
 408         }
 409
 410         /* Ideally and we've got a real resume here, and no port's power
 411          * was lost.  (For PCI, that means Vaux was maintained.)  But we
 412          * could instead be restoring a swsusp snapshot -- so that BIOS was
 413          * the last user of the controller, not reset/pm hardware keeping
 414          * state we gave to it.
 415          */
 416         power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
 417         ehci_dbg(ehci, "resume root hub%s\n",
 418                         power_okay ? "" : " after power loss");
 419
 420         /* at least some APM implementations will try to deliver
 421          * IRQs right away, so delay them until we're ready.
 422          */
 423         ehci_writel(ehci, 0, &ehci->regs->intr_enable);
 424
 425         /* re-init operational registers */
 426         ehci_writel(ehci, 0, &ehci->regs->segment);
 427         ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
 428         ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
 429
 430         /* restore CMD_RUN, framelist size, and irq threshold */
 431         ehci->command |= CMD_RUN;
 432         ehci_writel(ehci, ehci->command, &ehci->regs->command);
 433         ehci->rh_state = EHCI_RH_RUNNING;
 434
 435         /*
 436          * According to Bugzilla #8190, the port status for some controllers
 437          * will be wrong without a delay. At their wrong status, the port
 438          * is enabled, but not suspended neither resumed.
 439          */
 440         i = HCS_N_PORTS(ehci->hcs_params);
 441         while (i--) {
 442                 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
 443                 if ((temp & PORT_PE) &&
 444                                 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
 445                         ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
 446                         spin_unlock_irq(&ehci->lock);
 447                         msleep(8);
 448                         spin_lock_irq(&ehci->lock);
 449                         break;
 450                 }
 451         }
 452
 453         if (ehci->shutdown)
 454                 goto shutdown;
 455
 456         /* clear phy low-power mode before resume */
 457         if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
 458                 i = HCS_N_PORTS(ehci->hcs_params);
 459                 while (i--) {
 460                         if (test_bit(i, &ehci->bus_suspended)) {
 461                                 u32 __iomem     *hostpc_reg =
 462                                                         &ehci->regs->hostpc[i];
 463
 464                                 temp = ehci_readl(ehci, hostpc_reg);
 465                                 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
 466                                                 hostpc_reg);
 467                         }
 468                 }
 469                 spin_unlock_irq(&ehci->lock);
 470                 msleep(5);
 471                 spin_lock_irq(&ehci->lock);
 472                 if (ehci->shutdown)
 473                         goto shutdown;
 474         }
 475
 476         /* manually resume the ports we suspended during bus_suspend() */
 477         i = HCS_N_PORTS (ehci->hcs_params);
 478         while (i--) {
 479                 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
 480                 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
 481                 if (test_bit(i, &ehci->bus_suspended) &&
 482                                 (temp & PORT_SUSPEND)) {
 483                         temp |= PORT_RESUME;
 484                         set_bit(i, &resume_needed);
 485                 }
 486                 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 487         }
 488
 489         /*
 490          * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
 491          * port
 492          */
 493         if (resume_needed) {
 494                 spin_unlock_irq(&ehci->lock);
 495                 msleep(USB_RESUME_TIMEOUT);
 496                 spin_lock_irq(&ehci->lock);
 497                 if (ehci->shutdown)
 498                         goto shutdown;
 499         }
 500
 501         i = HCS_N_PORTS (ehci->hcs_params);
 502         while (i--) {
 503                 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
 504                 if (test_bit(i, &resume_needed)) {
 505                         temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
 506                         ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 507                 }
 508         }
 509
 510         ehci->next_statechange = jiffies + msecs_to_jiffies(5);
 511         spin_unlock_irq(&ehci->lock);
 512
 513         ehci_handover_companion_ports(ehci);
 514
 515         /* Now we can safely re-enable irqs */
 516         spin_lock_irq(&ehci->lock);
 517         if (ehci->shutdown)
 518                 goto shutdown;
 519         ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
 520         (void) ehci_readl(ehci, &ehci->regs->intr_enable);
 521         spin_unlock_irq(&ehci->lock);
 522
 523         return 0;
 524
 525  shutdown:
 526         spin_unlock_irq(&ehci->lock);
 527         return -ESHUTDOWN;
 528 }
 529
 530 #else
 531
 532 #define ehci_bus_suspend        NULL
 533 #define ehci_bus_resume         NULL
 534
 535 #endif  /* CONFIG_PM */
 536
 537 /*-------------------------------------------------------------------------*/
 538
 539 /*
 540  * Sets the owner of a port
 541  */
 542 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
 543 {
 544         u32 __iomem             *status_reg;
 545         u32                     port_status;
 546         int                     try;
 547
 548         status_reg = &ehci->regs->port_status[portnum];
 549
 550         /*
 551          * The controller won't set the OWNER bit if the port is
 552          * enabled, so this loop will sometimes require at least two
 553          * iterations: one to disable the port and one to set OWNER.
 554          */
 555         for (try = 4; try > 0; --try) {
 556                 spin_lock_irq(&ehci->lock);
 557                 port_status = ehci_readl(ehci, status_reg);
 558                 if ((port_status & PORT_OWNER) == new_owner
 559                                 || (port_status & (PORT_OWNER | PORT_CONNECT))
 560                                         == 0)
 561                         try = 0;
 562                 else {
 563                         port_status ^= PORT_OWNER;
 564                         port_status &= ~(PORT_PE | PORT_RWC_BITS);
 565                         ehci_writel(ehci, port_status, status_reg);
 566                 }
 567                 spin_unlock_irq(&ehci->lock);
 568                 if (try > 1)
 569                         msleep(5);
 570         }
 571 }
 572
 573 /*-------------------------------------------------------------------------*/
 574
 575 static int check_reset_complete (
 576         struct ehci_hcd *ehci,
 577         int             index,
 578         u32 __iomem     *status_reg,
 579         int             port_status
 580 ) {
 581         if (!(port_status & PORT_CONNECT))
 582                 return port_status;
 583
 584         /* if reset finished and it's still not enabled -- handoff */
 585         if (!(port_status & PORT_PE)) {
 586
 587                 /* with integrated TT, there's nobody to hand it to! */
 588                 if (ehci_is_TDI(ehci)) {
 589                         ehci_dbg (ehci,
 590                                 "Failed to enable port %d on root hub TT\n",
 591                                 index+1);
 592                         return port_status;
 593                 }
 594
 595                 ehci_dbg (ehci, "port %d full speed --> companion\n",
 596                         index + 1);
 597
 598                 // what happens if HCS_N_CC(params) == 0 ?
 599                 port_status |= PORT_OWNER;
 600                 port_status &= ~PORT_RWC_BITS;
 601                 ehci_writel(ehci, port_status, status_reg);
 602
 603                 /* ensure 440EPX ohci controller state is operational */
 604                 if (ehci->has_amcc_usb23)
 605                         set_ohci_hcfs(ehci, 1);
 606         } else {
 607                 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
 608                         index + 1);
 609                 /* ensure 440EPx ohci controller state is suspended */
 610                 if (ehci->has_amcc_usb23)
 611                         set_ohci_hcfs(ehci, 0);
 612         }
 613
 614         return port_status;
 615 }
 616
 617 /*-------------------------------------------------------------------------*/
 618
 619
 620 /* build "status change" packet (one or two bytes) from HC registers */
 621
 622 static int
 623 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
 624 {
 625         struct ehci_hcd *ehci = hcd_to_ehci (hcd);
 626         u32             temp, status;
 627         u32             mask;
 628         int             ports, i, retval = 1;
 629         unsigned long   flags;
 630         u32             ppcd = ~0;
 631
 632         /* init status to no-changes */
 633         buf [0] = 0;
 634         ports = HCS_N_PORTS (ehci->hcs_params);
 635         if (ports > 7) {
 636                 buf [1] = 0;
 637                 retval++;
 638         }
 639
 640         /* Inform the core about resumes-in-progress by returning
 641          * a non-zero value even if there are no status changes.
 642          */
 643         status = ehci->resuming_ports;
 644
 645         /* Some boards (mostly VIA?) report bogus overcurrent indications,
 646          * causing massive log spam unless we completely ignore them.  It
 647          * may be relevant that VIA VT8235 controllers, where PORT_POWER is
 648          * always set, seem to clear PORT_OCC and PORT_CSC when writing to
 649          * PORT_POWER; that's surprising, but maybe within-spec.
 650          */
 651         if (!ignore_oc)
 652                 mask = PORT_CSC | PORT_PEC | PORT_OCC;
 653         else
 654                 mask = PORT_CSC | PORT_PEC;
 655         // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
 656
 657         /* no hub change reports (bit 0) for now (power, ...) */
 658
 659         /* port N changes (bit N)? */
 660         spin_lock_irqsave (&ehci->lock, flags);
 661
 662         /* get per-port change detect bits */
 663         if (ehci->has_ppcd)
 664                 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
 665
 666         for (i = 0; i < ports; i++) {
 667                 /* leverage per-port change bits feature */
 668                 if (ppcd & (1 << i))
 669                         temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
 670                 else
 671                         temp = 0;
 672
 673                 /*
 674                  * Return status information even for ports with OWNER set.
 675                  * Otherwise hub_wq wouldn't see the disconnect event when a
 676                  * high-speed device is switched over to the companion
 677                  * controller by the user.
 678                  */
 679
 680                 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
 681                                 || (ehci->reset_done[i] && time_after_eq(
 682                                         jiffies, ehci->reset_done[i]))) {
 683                         if (i < 7)
 684                             buf [0] |= 1 << (i + 1);
 685                         else
 686                             buf [1] |= 1 << (i - 7);
 687                         status = STS_PCD;
 688                 }
 689         }
 690
 691         /* If a resume is in progress, make sure it can finish */
 692         if (ehci->resuming_ports)
 693                 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
 694
 695         spin_unlock_irqrestore (&ehci->lock, flags);
 696         return status ? retval : 0;
 697 }
 698
 699 /*-------------------------------------------------------------------------*/
 700
 701 static void
 702 ehci_hub_descriptor (
 703         struct ehci_hcd                 *ehci,
 704         struct usb_hub_descriptor       *desc
 705 ) {
 706         int             ports = HCS_N_PORTS (ehci->hcs_params);
 707         u16             temp;
 708
 709         desc->bDescriptorType = USB_DT_HUB;
 710         desc->bPwrOn2PwrGood = 10;      /* ehci 1.0, 2.3.9 says 20ms max */
 711         desc->bHubContrCurrent = 0;
 712
 713         desc->bNbrPorts = ports;
 714         temp = 1 + (ports / 8);
 715         desc->bDescLength = 7 + 2 * temp;
 716
 717         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
 718         memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
 719         memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
 720
 721         temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
 722         if (HCS_PPC (ehci->hcs_params))
 723                 temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */
 724         else
 725                 temp |= HUB_CHAR_NO_LPSM; /* no power switching */
 726 #if 0
 727 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
 728         if (HCS_INDICATOR (ehci->hcs_params))
 729                 temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */
 730 #endif
 731         desc->wHubCharacteristics = cpu_to_le16(temp);
 732 }
 733
 734 /*-------------------------------------------------------------------------*/
 735 #ifdef CONFIG_USB_HCD_TEST_MODE
 736
 737 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
 738
 739 static void usb_ehset_completion(struct urb *urb)
 740 {
 741         struct completion  *done = urb->context;
 742
 743         complete(done);
 744 }
 745 static int submit_single_step_set_feature(
 746         struct usb_hcd  *hcd,
 747         struct urb      *urb,
 748         int             is_setup
 749 );
 750
 751 /*
 752  * Allocate and initialize a control URB. This request will be used by the
 753  * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
 754  * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
 755  * Return NULL if failed.
 756  */
 757 static struct urb *request_single_step_set_feature_urb(
 758         struct usb_device       *udev,
 759         void                    *dr,
 760         void                    *buf,
 761         struct completion       *done
 762 ) {
 763         struct urb *urb;
 764         struct usb_hcd *hcd = bus_to_hcd(udev->bus);
 765         struct usb_host_endpoint *ep;
 766
 767         urb = usb_alloc_urb(0, GFP_KERNEL);
 768         if (!urb)
 769                 return NULL;
 770
 771         urb->pipe = usb_rcvctrlpipe(udev, 0);
 772         ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
 773                                 [usb_pipeendpoint(urb->pipe)];
 774         if (!ep) {
 775                 usb_free_urb(urb);
 776                 return NULL;
 777         }
 778
 779         urb->ep = ep;
 780         urb->dev = udev;
 781         urb->setup_packet = (void *)dr;
 782         urb->transfer_buffer = buf;
 783         urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
 784         urb->complete = usb_ehset_completion;
 785         urb->status = -EINPROGRESS;
 786         urb->actual_length = 0;
 787         urb->transfer_flags = URB_DIR_IN;
 788         usb_get_urb(urb);
 789         atomic_inc(&urb->use_count);
 790         atomic_inc(&urb->dev->urbnum);
 791         urb->setup_dma = dma_map_single(
 792                         hcd->self.sysdev,
 793                         urb->setup_packet,
 794                         sizeof(struct usb_ctrlrequest),
 795                         DMA_TO_DEVICE);
 796         urb->transfer_dma = dma_map_single(
 797                         hcd->self.sysdev,
 798                         urb->transfer_buffer,
 799                         urb->transfer_buffer_length,
 800                         DMA_FROM_DEVICE);
 801         urb->context = done;
 802         return urb;
 803 }
 804
 805 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
 806 {
 807         int retval = -ENOMEM;
 808         struct usb_ctrlrequest *dr;
 809         struct urb *urb;
 810         struct usb_device *udev;
 811         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 812         struct usb_device_descriptor *buf;
 813         DECLARE_COMPLETION_ONSTACK(done);
 814
 815         /* Obtain udev of the rhub's child port */
 816         udev = usb_hub_find_child(hcd->self.root_hub, port);
 817         if (!udev) {
 818                 ehci_err(ehci, "No device attached to the RootHub\n");
 819                 return -ENODEV;
 820         }
 821         buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
 822         if (!buf)
 823                 return -ENOMEM;
 824
 825         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
 826         if (!dr) {
 827                 kfree(buf);
 828                 return -ENOMEM;
 829         }
 830
 831         /* Fill Setup packet for GetDescriptor */
 832         dr->bRequestType = USB_DIR_IN;
 833         dr->bRequest = USB_REQ_GET_DESCRIPTOR;
 834         dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
 835         dr->wIndex = 0;
 836         dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
 837         urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
 838         if (!urb)
 839                 goto cleanup;
 840
 841         /* Submit just the SETUP stage */
 842         retval = submit_single_step_set_feature(hcd, urb, 1);
 843         if (retval)
 844                 goto out1;
 845         if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
 846                 usb_kill_urb(urb);
 847                 retval = -ETIMEDOUT;
 848                 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
 849                 goto out1;
 850         }
 851         msleep(15 * 1000);
 852
 853         /* Complete remaining DATA and STATUS stages using the same URB */
 854         urb->status = -EINPROGRESS;
 855         usb_get_urb(urb);
 856         atomic_inc(&urb->use_count);
 857         atomic_inc(&urb->dev->urbnum);
 858         retval = submit_single_step_set_feature(hcd, urb, 0);
 859         if (!retval && !wait_for_completion_timeout(&done,
 860                                                 msecs_to_jiffies(2000))) {
 861                 usb_kill_urb(urb);
 862                 retval = -ETIMEDOUT;
 863                 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
 864         }
 865 out1:
 866         usb_free_urb(urb);
 867 cleanup:
 868         kfree(dr);
 869         kfree(buf);
 870         return retval;
 871 }
 872 #endif /* CONFIG_USB_HCD_TEST_MODE */
 873 /*-------------------------------------------------------------------------*/
 874
 875 int ehci_hub_control(
 876         struct usb_hcd  *hcd,
 877         u16             typeReq,
 878         u16             wValue,
 879         u16             wIndex,
 880         char            *buf,
 881         u16             wLength
 882 ) {
 883         struct ehci_hcd *ehci = hcd_to_ehci (hcd);
 884         int             ports = HCS_N_PORTS (ehci->hcs_params);
 885         u32 __iomem     *status_reg, *hostpc_reg;
 886         u32             temp, temp1, status;
 887         unsigned long   flags;
 888         int             retval = 0;
 889         unsigned        selector;
 890
 891         /*
 892          * Avoid underflow while calculating (wIndex & 0xff) - 1.
 893          * The compiler might deduce that wIndex can never be 0 and then
 894          * optimize away the tests for !wIndex below.
 895          */
 896         temp = wIndex & 0xff;
 897         temp -= (temp > 0);
 898         status_reg = &ehci->regs->port_status[temp];
 899         hostpc_reg = &ehci->regs->hostpc[temp];
 900
 901         /*
 902          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
 903          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
 904          * (track current state ourselves) ... blink for diagnostics,
 905          * power, "this is the one", etc.  EHCI spec supports this.
 906          */
 907
 908         spin_lock_irqsave (&ehci->lock, flags);
 909         switch (typeReq) {
 910         case ClearHubFeature:
 911                 switch (wValue) {
 912                 case C_HUB_LOCAL_POWER:
 913                 case C_HUB_OVER_CURRENT:
 914                         /* no hub-wide feature/status flags */
 915                         break;
 916                 default:
 917                         goto error;
 918                 }
 919                 break;
 920         case ClearPortFeature:
 921                 if (!wIndex || wIndex > ports)
 922                         goto error;
 923                 wIndex--;
 924                 temp = ehci_readl(ehci, status_reg);
 925                 temp &= ~PORT_RWC_BITS;
 926
 927                 /*
 928                  * Even if OWNER is set, so the port is owned by the
 929                  * companion controller, hub_wq needs to be able to clear
 930                  * the port-change status bits (especially
 931                  * USB_PORT_STAT_C_CONNECTION).
 932                  */
 933
 934                 switch (wValue) {
 935                 case USB_PORT_FEAT_ENABLE:
 936                         ehci_writel(ehci, temp & ~PORT_PE, status_reg);
 937                         break;
 938                 case USB_PORT_FEAT_C_ENABLE:
 939                         ehci_writel(ehci, temp | PORT_PEC, status_reg);
 940                         break;
 941                 case USB_PORT_FEAT_SUSPEND:
 942                         if (temp & PORT_RESET)
 943                                 goto error;
 944                         if (ehci->no_selective_suspend)
 945                                 break;
 946 #ifdef CONFIG_USB_OTG
 947                         if ((hcd->self.otg_port == (wIndex + 1))
 948                             && hcd->self.b_hnp_enable) {
 949                                 otg_start_hnp(hcd->usb_phy->otg);
 950                                 break;
 951                         }
 952 #endif
 953                         if (!(temp & PORT_SUSPEND))
 954                                 break;
 955                         if ((temp & PORT_PE) == 0)
 956                                 goto error;
 957
 958                         /* clear phy low-power mode before resume */
 959                         if (ehci->has_tdi_phy_lpm) {
 960                                 temp1 = ehci_readl(ehci, hostpc_reg);
 961                                 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
 962                                                 hostpc_reg);
 963                                 spin_unlock_irqrestore(&ehci->lock, flags);
 964                                 msleep(5);/* wait to leave low-power mode */
 965                                 spin_lock_irqsave(&ehci->lock, flags);
 966                         }
 967                         /* resume signaling for 20 msec */
 968                         temp &= ~PORT_WAKE_BITS;
 969                         ehci_writel(ehci, temp | PORT_RESUME, status_reg);
 970                         ehci->reset_done[wIndex] = jiffies
 971                                         + msecs_to_jiffies(USB_RESUME_TIMEOUT);
 972                         set_bit(wIndex, &ehci->resuming_ports);
 973                         usb_hcd_start_port_resume(&hcd->self, wIndex);
 974                         break;
 975                 case USB_PORT_FEAT_C_SUSPEND:
 976                         clear_bit(wIndex, &ehci->port_c_suspend);
 977                         break;
 978                 case USB_PORT_FEAT_POWER:
 979                         if (HCS_PPC(ehci->hcs_params)) {
 980                                 spin_unlock_irqrestore(&ehci->lock, flags);
 981                                 ehci_port_power(ehci, wIndex, false);
 982                                 spin_lock_irqsave(&ehci->lock, flags);
 983                         }
 984                         break;
 985                 case USB_PORT_FEAT_C_CONNECTION:
 986                         ehci_writel(ehci, temp | PORT_CSC, status_reg);
 987                         break;
 988                 case USB_PORT_FEAT_C_OVER_CURRENT:
 989                         ehci_writel(ehci, temp | PORT_OCC, status_reg);
 990                         break;
 991                 case USB_PORT_FEAT_C_RESET:
 992                         /* GetPortStatus clears reset */
 993                         break;
 994                 default:
 995                         goto error;
 996                 }
 997                 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
 998                 break;
 999         case GetHubDescriptor:
1000                 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
1001                         buf);
1002                 break;
1003         case GetHubStatus:
1004                 /* no hub-wide feature/status flags */
1005                 memset (buf, 0, 4);
1006                 //cpu_to_le32s ((u32 *) buf);
1007                 break;
1008         case GetPortStatus:
1009                 if (!wIndex || wIndex > ports)
1010                         goto error;
1011                 wIndex--;
1012                 status = 0;
1013                 temp = ehci_readl(ehci, status_reg);
1014
1015                 // wPortChange bits
1016                 if (temp & PORT_CSC)
1017                         status |= USB_PORT_STAT_C_CONNECTION << 16;
1018                 if (temp & PORT_PEC)
1019                         status |= USB_PORT_STAT_C_ENABLE << 16;
1020
1021                 if ((temp & PORT_OCC) && !ignore_oc){
1022                         status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1023
1024                         /*
1025                          * Hubs should disable port power on over-current.
1026                          * However, not all EHCI implementations do this
1027                          * automatically, even if they _do_ support per-port
1028                          * power switching; they're allowed to just limit the
1029                          * current.  hub_wq will turn the power back on.
1030                          */
1031                         if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1032                                         && HCS_PPC(ehci->hcs_params)) {
1033                                 spin_unlock_irqrestore(&ehci->lock, flags);
1034                                 ehci_port_power(ehci, wIndex, false);
1035                                 spin_lock_irqsave(&ehci->lock, flags);
1036                                 temp = ehci_readl(ehci, status_reg);
1037                         }
1038                 }
1039
1040                 /* no reset or resume pending */
1041                 if (!ehci->reset_done[wIndex]) {
1042
1043                         /* Remote Wakeup received? */
1044                         if (temp & PORT_RESUME) {
1045                                 /* resume signaling for 20 msec */
1046                                 ehci->reset_done[wIndex] = jiffies
1047                                                 + msecs_to_jiffies(20);
1048                                 usb_hcd_start_port_resume(&hcd->self, wIndex);
1049                                 set_bit(wIndex, &ehci->resuming_ports);
1050                                 /* check the port again */
1051                                 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
1052                                                 ehci->reset_done[wIndex]);
1053                         }
1054
1055                 /* reset or resume not yet complete */
1056                 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
1057                         ;       /* wait until it is complete */
1058
1059                 /* resume completed */
1060                 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
1061                         clear_bit(wIndex, &ehci->suspended_ports);
1062                         set_bit(wIndex, &ehci->port_c_suspend);
1063                         ehci->reset_done[wIndex] = 0;
1064                         usb_hcd_end_port_resume(&hcd->self, wIndex);
1065
1066                         /* stop resume signaling */
1067                         temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
1068                         ehci_writel(ehci, temp, status_reg);
1069                         clear_bit(wIndex, &ehci->resuming_ports);
1070                         retval = ehci_handshake(ehci, status_reg,
1071                                         PORT_RESUME, 0, 2000 /* 2msec */);
1072                         if (retval != 0) {
1073                                 ehci_err(ehci, "port %d resume error %d\n",
1074                                                 wIndex + 1, retval);
1075                                 goto error;
1076                         }
1077                         temp = ehci_readl(ehci, status_reg);
1078
1079                 /* whoever resets must GetPortStatus to complete it!! */
1080                 } else {
1081                         status |= USB_PORT_STAT_C_RESET << 16;
1082                         ehci->reset_done [wIndex] = 0;
1083
1084                         /* force reset to complete */
1085                         ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
1086                                         status_reg);
1087                         /* REVISIT:  some hardware needs 550+ usec to clear
1088                          * this bit; seems too long to spin routinely...
1089                          */
1090                         retval = ehci_handshake(ehci, status_reg,
1091                                         PORT_RESET, 0, 1000);
1092                         if (retval != 0) {
1093                                 ehci_err (ehci, "port %d reset error %d\n",
1094                                         wIndex + 1, retval);
1095                                 goto error;
1096                         }
1097
1098                         /* see what we found out */
1099                         temp = check_reset_complete (ehci, wIndex, status_reg,
1100                                         ehci_readl(ehci, status_reg));
1101                 }
1102
1103                 /* transfer dedicated ports to the companion hc */
1104                 if ((temp & PORT_CONNECT) &&
1105                                 test_bit(wIndex, &ehci->companion_ports)) {
1106                         temp &= ~PORT_RWC_BITS;
1107                         temp |= PORT_OWNER;
1108                         ehci_writel(ehci, temp, status_reg);
1109                         ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
1110                         temp = ehci_readl(ehci, status_reg);
1111                 }
1112
1113                 /*
1114                  * Even if OWNER is set, there's no harm letting hub_wq
1115                  * see the wPortStatus values (they should all be 0 except
1116                  * for PORT_POWER anyway).
1117                  */
1118
1119                 if (temp & PORT_CONNECT) {
1120                         status |= USB_PORT_STAT_CONNECTION;
1121                         // status may be from integrated TT
1122                         if (ehci->has_hostpc) {
1123                                 temp1 = ehci_readl(ehci, hostpc_reg);
1124                                 status |= ehci_port_speed(ehci, temp1);
1125                         } else
1126                                 status |= ehci_port_speed(ehci, temp);
1127                 }
1128                 if (temp & PORT_PE)
1129                         status |= USB_PORT_STAT_ENABLE;
1130
1131                 /* maybe the port was unsuspended without our knowledge */
1132                 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
1133                         status |= USB_PORT_STAT_SUSPEND;
1134                 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1135                         clear_bit(wIndex, &ehci->suspended_ports);
1136                         clear_bit(wIndex, &ehci->resuming_ports);
1137                         ehci->reset_done[wIndex] = 0;
1138                         if (temp & PORT_PE)
1139                                 set_bit(wIndex, &ehci->port_c_suspend);
1140                         usb_hcd_end_port_resume(&hcd->self, wIndex);
1141                 }
1142
1143                 if (temp & PORT_OC)
1144                         status |= USB_PORT_STAT_OVERCURRENT;
1145                 if (temp & PORT_RESET)
1146                         status |= USB_PORT_STAT_RESET;
1147                 if (temp & PORT_POWER)
1148                         status |= USB_PORT_STAT_POWER;
1149                 if (test_bit(wIndex, &ehci->port_c_suspend))
1150                         status |= USB_PORT_STAT_C_SUSPEND << 16;
1151
1152                 if (status & ~0xffff)   /* only if wPortChange is interesting */
1153                         dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1154                 put_unaligned_le32(status, buf);
1155                 break;
1156         case SetHubFeature:
1157                 switch (wValue) {
1158                 case C_HUB_LOCAL_POWER:
1159                 case C_HUB_OVER_CURRENT:
1160                         /* no hub-wide feature/status flags */
1161                         break;
1162                 default:
1163                         goto error;
1164                 }
1165                 break;
1166         case SetPortFeature:
1167                 selector = wIndex >> 8;
1168                 wIndex &= 0xff;
1169                 if (unlikely(ehci->debug)) {
1170                         /* If the debug port is active any port
1171                          * feature requests should get denied */
1172                         if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1173                             (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1174                                 retval = -ENODEV;
1175                                 goto error_exit;
1176                         }
1177                 }
1178                 if (!wIndex || wIndex > ports)
1179                         goto error;
1180                 wIndex--;
1181                 temp = ehci_readl(ehci, status_reg);
1182                 if (temp & PORT_OWNER)
1183                         break;
1184
1185                 temp &= ~PORT_RWC_BITS;
1186                 switch (wValue) {
1187                 case USB_PORT_FEAT_SUSPEND:
1188                         if (ehci->no_selective_suspend)
1189                                 break;
1190                         if ((temp & PORT_PE) == 0
1191                                         || (temp & PORT_RESET) != 0)
1192                                 goto error;
1193
1194                         /* After above check the port must be connected.
1195                          * Set appropriate bit thus could put phy into low power
1196                          * mode if we have tdi_phy_lpm feature
1197                          */
1198                         temp &= ~PORT_WKCONN_E;
1199                         temp |= PORT_WKDISC_E | PORT_WKOC_E;
1200                         ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1201                         if (ehci->has_tdi_phy_lpm) {
1202                                 spin_unlock_irqrestore(&ehci->lock, flags);
1203                                 msleep(5);/* 5ms for HCD enter low pwr mode */
1204                                 spin_lock_irqsave(&ehci->lock, flags);
1205                                 temp1 = ehci_readl(ehci, hostpc_reg);
1206                                 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1207                                         hostpc_reg);
1208                                 temp1 = ehci_readl(ehci, hostpc_reg);
1209                                 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1210                                         wIndex, (temp1 & HOSTPC_PHCD) ?
1211                                         "succeeded" : "failed");
1212                         }
1213                         if (ehci_has_fsl_susp_errata(ehci)) {
1214                                 /* 10ms for HCD enter suspend */
1215                                 spin_unlock_irqrestore(&ehci->lock, flags);
1216                                 usleep_range(10000, 20000);
1217                                 spin_lock_irqsave(&ehci->lock, flags);
1218                         }
1219                         set_bit(wIndex, &ehci->suspended_ports);
1220                         break;
1221                 case USB_PORT_FEAT_POWER:
1222                         if (HCS_PPC(ehci->hcs_params)) {
1223                                 spin_unlock_irqrestore(&ehci->lock, flags);
1224                                 ehci_port_power(ehci, wIndex, true);
1225                                 spin_lock_irqsave(&ehci->lock, flags);
1226                         }
1227                         break;
1228                 case USB_PORT_FEAT_RESET:
1229                         if (temp & (PORT_SUSPEND|PORT_RESUME))
1230                                 goto error;
1231                         /* line status bits may report this as low speed,
1232                          * which can be fine if this root hub has a
1233                          * transaction translator built in.
1234                          */
1235                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1236                                         && !ehci_is_TDI(ehci)
1237                                         && PORT_USB11 (temp)) {
1238                                 ehci_dbg (ehci,
1239                                         "port %d low speed --> companion\n",
1240                                         wIndex + 1);
1241                                 temp |= PORT_OWNER;
1242                         } else {
1243                                 temp |= PORT_RESET;
1244                                 temp &= ~PORT_PE;
1245
1246                                 /*
1247                                  * caller must wait, then call GetPortStatus
1248                                  * usb 2.0 spec says 50 ms resets on root
1249                                  */
1250                                 ehci->reset_done [wIndex] = jiffies
1251                                                 + msecs_to_jiffies (50);
1252
1253                                 /*
1254                                  * Force full-speed connect for FSL high-speed
1255                                  * erratum; disable HS Chirp by setting PFSC bit
1256                                  */
1257                                 if (ehci_has_fsl_hs_errata(ehci))
1258                                         temp |= (1 << PORTSC_FSL_PFSC);
1259                         }
1260                         ehci_writel(ehci, temp, status_reg);
1261                         break;
1262
1263                 /* For downstream facing ports (these):  one hub port is put
1264                  * into test mode according to USB2 11.24.2.13, then the hub
1265                  * must be reset (which for root hub now means rmmod+modprobe,
1266                  * or else system reboot).  See EHCI 2.3.9 and 4.14 for info
1267                  * about the EHCI-specific stuff.
1268                  */
1269                 case USB_PORT_FEAT_TEST:
1270 #ifdef CONFIG_USB_HCD_TEST_MODE
1271                         if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1272                                 spin_unlock_irqrestore(&ehci->lock, flags);
1273                                 retval = ehset_single_step_set_feature(hcd,
1274                                                                 wIndex + 1);
1275                                 spin_lock_irqsave(&ehci->lock, flags);
1276                                 break;
1277                         }
1278 #endif
1279                         if (!selector || selector > 5)
1280                                 goto error;
1281                         spin_unlock_irqrestore(&ehci->lock, flags);
1282                         ehci_quiesce(ehci);
1283                         spin_lock_irqsave(&ehci->lock, flags);
1284
1285                         /* Put all enabled ports into suspend */
1286                         while (ports--) {
1287                                 u32 __iomem *sreg =
1288                                                 &ehci->regs->port_status[ports];
1289
1290                                 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1291                                 if (temp & PORT_PE)
1292                                         ehci_writel(ehci, temp | PORT_SUSPEND,
1293                                                         sreg);
1294                         }
1295
1296                         spin_unlock_irqrestore(&ehci->lock, flags);
1297                         ehci_halt(ehci);
1298                         spin_lock_irqsave(&ehci->lock, flags);
1299
1300                         temp = ehci_readl(ehci, status_reg);
1301                         temp |= selector << 16;
1302                         ehci_writel(ehci, temp, status_reg);
1303                         break;
1304
1305                 default:
1306                         goto error;
1307                 }
1308                 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1309                 break;
1310
1311         default:
1312 error:
1313                 /* "stall" on error */
1314                 retval = -EPIPE;
1315         }
1316 error_exit:
1317         spin_unlock_irqrestore (&ehci->lock, flags);
1318         return retval;
1319 }
1320 EXPORT_SYMBOL_GPL(ehci_hub_control);
1321
1322 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1323 {
1324         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1325
1326         if (ehci_is_TDI(ehci))
1327                 return;
1328         set_owner(ehci, --portnum, PORT_OWNER);
1329 }
1330
1331 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1332 {
1333         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1334         u32 __iomem             *reg;
1335
1336         if (ehci_is_TDI(ehci))
1337                 return 0;
1338         reg = &ehci->regs->port_status[portnum - 1];
1339         return ehci_readl(ehci, reg) & PORT_OWNER;
1340 }
1341
1342 static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable)
1343 {
1344         struct usb_hcd *hcd = ehci_to_hcd(ehci);
1345         u32 __iomem *status_reg = &ehci->regs->port_status[portnum];
1346         u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
1347
1348         if (enable)
1349                 ehci_writel(ehci, temp | PORT_POWER, status_reg);
1350         else
1351                 ehci_writel(ehci, temp & ~PORT_POWER, status_reg);
1352
1353         if (hcd->driver->port_power)
1354                 hcd->driver->port_power(hcd, portnum, enable);
1355
1356         return 0;
1357 }