1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2001-2004 by David Brownell 4 */ 5 6 /* this file is part of ehci-hcd.c */ 7 8 /*-------------------------------------------------------------------------*/ 9 10 /* 11 * EHCI Root Hub ... the nonsharable stuff 12 * 13 * Registers don't need cpu_to_le32, that happens transparently 14 */ 15 16 /*-------------------------------------------------------------------------*/ 17 #include <linux/usb/otg.h> 18 19 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) 20 21 #ifdef CONFIG_PM 22 23 static void unlink_empty_async_suspended(struct ehci_hcd *ehci); 24 25 static int persist_enabled_on_companion(struct usb_device *udev, void *unused) 26 { 27 return !udev->maxchild && udev->persist_enabled && 28 udev->bus->root_hub->speed < USB_SPEED_HIGH; 29 } 30 31 /* After a power loss, ports that were owned by the companion must be 32 * reset so that the companion can still own them. 33 */ 34 static void ehci_handover_companion_ports(struct ehci_hcd *ehci) 35 { 36 u32 __iomem *reg; 37 u32 status; 38 int port; 39 __le32 buf; 40 struct usb_hcd *hcd = ehci_to_hcd(ehci); 41 42 if (!ehci->owned_ports) 43 return; 44 45 /* 46 * USB 1.1 devices are mostly HIDs, which don't need to persist across 47 * suspends. If we ensure that none of our companion's devices have 48 * persist_enabled (by looking through all USB 1.1 buses in the system), 49 * we can skip this and avoid slowing resume down. Devices without 50 * persist will just get reenumerated shortly after resume anyway. 51 */ 52 if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) 53 return; 54 55 /* Make sure the ports are powered */ 56 port = HCS_N_PORTS(ehci->hcs_params); 57 while (port--) { 58 if (test_bit(port, &ehci->owned_ports)) { 59 reg = &ehci->regs->port_status[port]; 60 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 61 if (!(status & PORT_POWER)) 62 ehci_port_power(ehci, port, true); 63 } 64 } 65 66 /* Give the connections some time to appear */ 67 msleep(20); 68 69 spin_lock_irq(&ehci->lock); 70 port = HCS_N_PORTS(ehci->hcs_params); 71 while (port--) { 72 if (test_bit(port, &ehci->owned_ports)) { 73 reg = &ehci->regs->port_status[port]; 74 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 75 76 /* Port already owned by companion? */ 77 if (status & PORT_OWNER) 78 clear_bit(port, &ehci->owned_ports); 79 else if (test_bit(port, &ehci->companion_ports)) 80 ehci_writel(ehci, status & ~PORT_PE, reg); 81 else { 82 spin_unlock_irq(&ehci->lock); 83 ehci_hub_control(hcd, SetPortFeature, 84 USB_PORT_FEAT_RESET, port + 1, 85 NULL, 0); 86 spin_lock_irq(&ehci->lock); 87 } 88 } 89 } 90 spin_unlock_irq(&ehci->lock); 91 92 if (!ehci->owned_ports) 93 return; 94 msleep(90); /* Wait for resets to complete */ 95 96 spin_lock_irq(&ehci->lock); 97 port = HCS_N_PORTS(ehci->hcs_params); 98 while (port--) { 99 if (test_bit(port, &ehci->owned_ports)) { 100 spin_unlock_irq(&ehci->lock); 101 ehci_hub_control(hcd, GetPortStatus, 102 0, port + 1, 103 (char *) &buf, sizeof(buf)); 104 spin_lock_irq(&ehci->lock); 105 106 /* The companion should now own the port, 107 * but if something went wrong the port must not 108 * remain enabled. 109 */ 110 reg = &ehci->regs->port_status[port]; 111 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 112 if (status & PORT_OWNER) 113 ehci_writel(ehci, status | PORT_CSC, reg); 114 else { 115 ehci_dbg(ehci, "failed handover port %d: %x\n", 116 port + 1, status); 117 ehci_writel(ehci, status & ~PORT_PE, reg); 118 } 119 } 120 } 121 122 ehci->owned_ports = 0; 123 spin_unlock_irq(&ehci->lock); 124 } 125 126 static int ehci_port_change(struct ehci_hcd *ehci) 127 { 128 int i = HCS_N_PORTS(ehci->hcs_params); 129 130 /* First check if the controller indicates a change event */ 131 132 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) 133 return 1; 134 135 /* 136 * Not all controllers appear to update this while going from D3 to D0, 137 * so check the individual port status registers as well 138 */ 139 140 while (i--) 141 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) 142 return 1; 143 144 return 0; 145 } 146 147 void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, 148 bool suspending, bool do_wakeup) 149 { 150 int port; 151 u32 temp; 152 153 /* If remote wakeup is enabled for the root hub but disabled 154 * for the controller, we must adjust all the port wakeup flags 155 * when the controller is suspended or resumed. In all other 156 * cases they don't need to be changed. 157 */ 158 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) 159 return; 160 161 spin_lock_irq(&ehci->lock); 162 163 /* clear phy low-power mode before changing wakeup flags */ 164 if (ehci->has_tdi_phy_lpm) { 165 port = HCS_N_PORTS(ehci->hcs_params); 166 while (port--) { 167 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 168 169 temp = ehci_readl(ehci, hostpc_reg); 170 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); 171 } 172 spin_unlock_irq(&ehci->lock); 173 msleep(5); 174 spin_lock_irq(&ehci->lock); 175 } 176 177 port = HCS_N_PORTS(ehci->hcs_params); 178 while (port--) { 179 u32 __iomem *reg = &ehci->regs->port_status[port]; 180 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 181 u32 t2 = t1 & ~PORT_WAKE_BITS; 182 183 /* If we are suspending the controller, clear the flags. 184 * If we are resuming the controller, set the wakeup flags. 185 */ 186 if (!suspending) { 187 if (t1 & PORT_CONNECT) 188 t2 |= PORT_WKOC_E | PORT_WKDISC_E; 189 else 190 t2 |= PORT_WKOC_E | PORT_WKCONN_E; 191 } 192 ehci_writel(ehci, t2, reg); 193 } 194 195 /* enter phy low-power mode again */ 196 if (ehci->has_tdi_phy_lpm) { 197 port = HCS_N_PORTS(ehci->hcs_params); 198 while (port--) { 199 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 200 201 temp = ehci_readl(ehci, hostpc_reg); 202 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); 203 } 204 } 205 206 /* Does the root hub have a port wakeup pending? */ 207 if (!suspending && ehci_port_change(ehci)) 208 usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); 209 210 spin_unlock_irq(&ehci->lock); 211 } 212 EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags); 213 214 static int ehci_bus_suspend (struct usb_hcd *hcd) 215 { 216 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 217 int port; 218 int mask; 219 int changed; 220 bool fs_idle_delay; 221 222 ehci_dbg(ehci, "suspend root hub\n"); 223 224 if (time_before (jiffies, ehci->next_statechange)) 225 msleep(5); 226 227 /* stop the schedules */ 228 ehci_quiesce(ehci); 229 230 spin_lock_irq (&ehci->lock); 231 if (ehci->rh_state < EHCI_RH_RUNNING) 232 goto done; 233 234 /* Once the controller is stopped, port resumes that are already 235 * in progress won't complete. Hence if remote wakeup is enabled 236 * for the root hub and any ports are in the middle of a resume or 237 * remote wakeup, we must fail the suspend. 238 */ 239 if (hcd->self.root_hub->do_remote_wakeup) { 240 if (ehci->resuming_ports) { 241 spin_unlock_irq(&ehci->lock); 242 ehci_dbg(ehci, "suspend failed because a port is resuming\n"); 243 return -EBUSY; 244 } 245 } 246 247 /* Unlike other USB host controller types, EHCI doesn't have 248 * any notion of "global" or bus-wide suspend. The driver has 249 * to manually suspend all the active unsuspended ports, and 250 * then manually resume them in the bus_resume() routine. 251 */ 252 ehci->bus_suspended = 0; 253 ehci->owned_ports = 0; 254 changed = 0; 255 fs_idle_delay = false; 256 port = HCS_N_PORTS(ehci->hcs_params); 257 while (port--) { 258 u32 __iomem *reg = &ehci->regs->port_status [port]; 259 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 260 u32 t2 = t1 & ~PORT_WAKE_BITS; 261 262 /* keep track of which ports we suspend */ 263 if (t1 & PORT_OWNER) 264 set_bit(port, &ehci->owned_ports); 265 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { 266 t2 |= PORT_SUSPEND; 267 set_bit(port, &ehci->bus_suspended); 268 } 269 270 /* enable remote wakeup on all ports, if told to do so */ 271 if (hcd->self.root_hub->do_remote_wakeup) { 272 /* only enable appropriate wake bits, otherwise the 273 * hardware can not go phy low power mode. If a race 274 * condition happens here(connection change during bits 275 * set), the port change detection will finally fix it. 276 */ 277 if (t1 & PORT_CONNECT) 278 t2 |= PORT_WKOC_E | PORT_WKDISC_E; 279 else 280 t2 |= PORT_WKOC_E | PORT_WKCONN_E; 281 } 282 283 if (t1 != t2) { 284 /* 285 * On some controllers, Wake-On-Disconnect will 286 * generate false wakeup signals until the bus 287 * switches over to full-speed idle. For their 288 * sake, add a delay if we need one. 289 */ 290 if ((t2 & PORT_WKDISC_E) && 291 ehci_port_speed(ehci, t2) == 292 USB_PORT_STAT_HIGH_SPEED) 293 fs_idle_delay = true; 294 ehci_writel(ehci, t2, reg); 295 changed = 1; 296 } 297 } 298 spin_unlock_irq(&ehci->lock); 299 300 if (changed && ehci_has_fsl_susp_errata(ehci)) 301 /* 302 * Wait for at least 10 millisecondes to ensure the controller 303 * enter the suspend status before initiating a port resume 304 * using the Force Port Resume bit (Not-EHCI compatible). 305 */ 306 usleep_range(10000, 20000); 307 308 if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { 309 /* 310 * Wait for HCD to enter low-power mode or for the bus 311 * to switch to full-speed idle. 312 */ 313 usleep_range(5000, 5500); 314 } 315 316 if (changed && ehci->has_tdi_phy_lpm) { 317 spin_lock_irq(&ehci->lock); 318 port = HCS_N_PORTS(ehci->hcs_params); 319 while (port--) { 320 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 321 u32 t3; 322 323 t3 = ehci_readl(ehci, hostpc_reg); 324 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); 325 t3 = ehci_readl(ehci, hostpc_reg); 326 ehci_dbg(ehci, "Port %d phy low-power mode %s\n", 327 port, (t3 & HOSTPC_PHCD) ? 328 "succeeded" : "failed"); 329 } 330 spin_unlock_irq(&ehci->lock); 331 } 332 333 /* Apparently some devices need a >= 1-uframe delay here */ 334 if (ehci->bus_suspended) 335 udelay(150); 336 337 /* turn off now-idle HC */ 338 ehci_halt (ehci); 339 340 spin_lock_irq(&ehci->lock); 341 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) 342 ehci_handle_controller_death(ehci); 343 if (ehci->rh_state != EHCI_RH_RUNNING) 344 goto done; 345 ehci->rh_state = EHCI_RH_SUSPENDED; 346 347 unlink_empty_async_suspended(ehci); 348 349 /* Any IAA cycle that started before the suspend is now invalid */ 350 end_iaa_cycle(ehci); 351 ehci_handle_start_intr_unlinks(ehci); 352 ehci_handle_intr_unlinks(ehci); 353 end_free_itds(ehci); 354 355 /* allow remote wakeup */ 356 mask = INTR_MASK; 357 if (!hcd->self.root_hub->do_remote_wakeup) 358 mask &= ~STS_PCD; 359 ehci_writel(ehci, mask, &ehci->regs->intr_enable); 360 ehci_readl(ehci, &ehci->regs->intr_enable); 361 362 done: 363 ehci->next_statechange = jiffies + msecs_to_jiffies(10); 364 ehci->enabled_hrtimer_events = 0; 365 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; 366 spin_unlock_irq (&ehci->lock); 367 368 hrtimer_cancel(&ehci->hrtimer); 369 return 0; 370 } 371 372 373 /* caller has locked the root hub, and should reset/reinit on error */ 374 static int ehci_bus_resume (struct usb_hcd *hcd) 375 { 376 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 377 u32 temp; 378 u32 power_okay; 379 int i; 380 unsigned long resume_needed = 0; 381 382 if (time_before (jiffies, ehci->next_statechange)) 383 msleep(5); 384 spin_lock_irq (&ehci->lock); 385 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) 386 goto shutdown; 387 388 if (unlikely(ehci->debug)) { 389 if (!dbgp_reset_prep(hcd)) 390 ehci->debug = NULL; 391 else 392 dbgp_external_startup(hcd); 393 } 394 395 /* Ideally and we've got a real resume here, and no port's power 396 * was lost. (For PCI, that means Vaux was maintained.) But we 397 * could instead be restoring a swsusp snapshot -- so that BIOS was 398 * the last user of the controller, not reset/pm hardware keeping 399 * state we gave to it. 400 */ 401 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); 402 ehci_dbg(ehci, "resume root hub%s\n", 403 power_okay ? "" : " after power loss"); 404 405 /* at least some APM implementations will try to deliver 406 * IRQs right away, so delay them until we're ready. 407 */ 408 ehci_writel(ehci, 0, &ehci->regs->intr_enable); 409 410 /* re-init operational registers */ 411 ehci_writel(ehci, 0, &ehci->regs->segment); 412 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); 413 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); 414 415 /* restore CMD_RUN, framelist size, and irq threshold */ 416 ehci->command |= CMD_RUN; 417 ehci_writel(ehci, ehci->command, &ehci->regs->command); 418 ehci->rh_state = EHCI_RH_RUNNING; 419 420 /* 421 * According to Bugzilla #8190, the port status for some controllers 422 * will be wrong without a delay. At their wrong status, the port 423 * is enabled, but not suspended neither resumed. 424 */ 425 i = HCS_N_PORTS(ehci->hcs_params); 426 while (i--) { 427 temp = ehci_readl(ehci, &ehci->regs->port_status[i]); 428 if ((temp & PORT_PE) && 429 !(temp & (PORT_SUSPEND | PORT_RESUME))) { 430 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); 431 spin_unlock_irq(&ehci->lock); 432 msleep(8); 433 spin_lock_irq(&ehci->lock); 434 break; 435 } 436 } 437 438 if (ehci->shutdown) 439 goto shutdown; 440 441 /* clear phy low-power mode before resume */ 442 if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { 443 i = HCS_N_PORTS(ehci->hcs_params); 444 while (i--) { 445 if (test_bit(i, &ehci->bus_suspended)) { 446 u32 __iomem *hostpc_reg = 447 &ehci->regs->hostpc[i]; 448 449 temp = ehci_readl(ehci, hostpc_reg); 450 ehci_writel(ehci, temp & ~HOSTPC_PHCD, 451 hostpc_reg); 452 } 453 } 454 spin_unlock_irq(&ehci->lock); 455 msleep(5); 456 spin_lock_irq(&ehci->lock); 457 if (ehci->shutdown) 458 goto shutdown; 459 } 460 461 /* manually resume the ports we suspended during bus_suspend() */ 462 i = HCS_N_PORTS (ehci->hcs_params); 463 while (i--) { 464 temp = ehci_readl(ehci, &ehci->regs->port_status [i]); 465 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); 466 if (test_bit(i, &ehci->bus_suspended) && 467 (temp & PORT_SUSPEND)) { 468 temp |= PORT_RESUME; 469 set_bit(i, &resume_needed); 470 } 471 ehci_writel(ehci, temp, &ehci->regs->port_status [i]); 472 } 473 474 /* 475 * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume 476 * port 477 */ 478 if (resume_needed) { 479 spin_unlock_irq(&ehci->lock); 480 msleep(USB_RESUME_TIMEOUT); 481 spin_lock_irq(&ehci->lock); 482 if (ehci->shutdown) 483 goto shutdown; 484 } 485 486 i = HCS_N_PORTS (ehci->hcs_params); 487 while (i--) { 488 temp = ehci_readl(ehci, &ehci->regs->port_status [i]); 489 if (test_bit(i, &resume_needed)) { 490 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); 491 ehci_writel(ehci, temp, &ehci->regs->port_status [i]); 492 } 493 } 494 495 ehci->next_statechange = jiffies + msecs_to_jiffies(5); 496 spin_unlock_irq(&ehci->lock); 497 498 ehci_handover_companion_ports(ehci); 499 500 /* Now we can safely re-enable irqs */ 501 spin_lock_irq(&ehci->lock); 502 if (ehci->shutdown) 503 goto shutdown; 504 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); 505 (void) ehci_readl(ehci, &ehci->regs->intr_enable); 506 spin_unlock_irq(&ehci->lock); 507 508 return 0; 509 510 shutdown: 511 spin_unlock_irq(&ehci->lock); 512 return -ESHUTDOWN; 513 } 514 515 #else 516 517 #define ehci_bus_suspend NULL 518 #define ehci_bus_resume NULL 519 520 #endif /* CONFIG_PM */ 521 522 /*-------------------------------------------------------------------------*/ 523 524 /* 525 * Sets the owner of a port 526 */ 527 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) 528 { 529 u32 __iomem *status_reg; 530 u32 port_status; 531 int try; 532 533 status_reg = &ehci->regs->port_status[portnum]; 534 535 /* 536 * The controller won't set the OWNER bit if the port is 537 * enabled, so this loop will sometimes require at least two 538 * iterations: one to disable the port and one to set OWNER. 539 */ 540 for (try = 4; try > 0; --try) { 541 spin_lock_irq(&ehci->lock); 542 port_status = ehci_readl(ehci, status_reg); 543 if ((port_status & PORT_OWNER) == new_owner 544 || (port_status & (PORT_OWNER | PORT_CONNECT)) 545 == 0) 546 try = 0; 547 else { 548 port_status ^= PORT_OWNER; 549 port_status &= ~(PORT_PE | PORT_RWC_BITS); 550 ehci_writel(ehci, port_status, status_reg); 551 } 552 spin_unlock_irq(&ehci->lock); 553 if (try > 1) 554 msleep(5); 555 } 556 } 557 558 /*-------------------------------------------------------------------------*/ 559 560 static int check_reset_complete ( 561 struct ehci_hcd *ehci, 562 int index, 563 u32 __iomem *status_reg, 564 int port_status 565 ) { 566 if (!(port_status & PORT_CONNECT)) 567 return port_status; 568 569 /* if reset finished and it's still not enabled -- handoff */ 570 if (!(port_status & PORT_PE)) { 571 572 /* with integrated TT, there's nobody to hand it to! */ 573 if (ehci_is_TDI(ehci)) { 574 ehci_dbg (ehci, 575 "Failed to enable port %d on root hub TT\n", 576 index+1); 577 return port_status; 578 } 579 580 ehci_dbg (ehci, "port %d full speed --> companion\n", 581 index + 1); 582 583 // what happens if HCS_N_CC(params) == 0 ? 584 port_status |= PORT_OWNER; 585 port_status &= ~PORT_RWC_BITS; 586 ehci_writel(ehci, port_status, status_reg); 587 588 /* ensure 440EPX ohci controller state is operational */ 589 if (ehci->has_amcc_usb23) 590 set_ohci_hcfs(ehci, 1); 591 } else { 592 ehci_dbg(ehci, "port %d reset complete, port enabled\n", 593 index + 1); 594 /* ensure 440EPx ohci controller state is suspended */ 595 if (ehci->has_amcc_usb23) 596 set_ohci_hcfs(ehci, 0); 597 } 598 599 return port_status; 600 } 601 602 /*-------------------------------------------------------------------------*/ 603 604 605 /* build "status change" packet (one or two bytes) from HC registers */ 606 607 static int 608 ehci_hub_status_data (struct usb_hcd *hcd, char *buf) 609 { 610 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 611 u32 temp, status; 612 u32 mask; 613 int ports, i, retval = 1; 614 unsigned long flags; 615 u32 ppcd = ~0; 616 617 /* init status to no-changes */ 618 buf [0] = 0; 619 ports = HCS_N_PORTS (ehci->hcs_params); 620 if (ports > 7) { 621 buf [1] = 0; 622 retval++; 623 } 624 625 /* Inform the core about resumes-in-progress by returning 626 * a non-zero value even if there are no status changes. 627 */ 628 status = ehci->resuming_ports; 629 630 /* Some boards (mostly VIA?) report bogus overcurrent indications, 631 * causing massive log spam unless we completely ignore them. It 632 * may be relevant that VIA VT8235 controllers, where PORT_POWER is 633 * always set, seem to clear PORT_OCC and PORT_CSC when writing to 634 * PORT_POWER; that's surprising, but maybe within-spec. 635 */ 636 if (!ignore_oc) 637 mask = PORT_CSC | PORT_PEC | PORT_OCC; 638 else 639 mask = PORT_CSC | PORT_PEC; 640 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND 641 642 /* no hub change reports (bit 0) for now (power, ...) */ 643 644 /* port N changes (bit N)? */ 645 spin_lock_irqsave (&ehci->lock, flags); 646 647 /* get per-port change detect bits */ 648 if (ehci->has_ppcd) 649 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; 650 651 for (i = 0; i < ports; i++) { 652 /* leverage per-port change bits feature */ 653 if (ppcd & (1 << i)) 654 temp = ehci_readl(ehci, &ehci->regs->port_status[i]); 655 else 656 temp = 0; 657 658 /* 659 * Return status information even for ports with OWNER set. 660 * Otherwise hub_wq wouldn't see the disconnect event when a 661 * high-speed device is switched over to the companion 662 * controller by the user. 663 */ 664 665 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) 666 || (ehci->reset_done[i] && time_after_eq( 667 jiffies, ehci->reset_done[i]))) { 668 if (i < 7) 669 buf [0] |= 1 << (i + 1); 670 else 671 buf [1] |= 1 << (i - 7); 672 status = STS_PCD; 673 } 674 } 675 676 /* If a resume is in progress, make sure it can finish */ 677 if (ehci->resuming_ports) 678 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); 679 680 spin_unlock_irqrestore (&ehci->lock, flags); 681 return status ? retval : 0; 682 } 683 684 /*-------------------------------------------------------------------------*/ 685 686 static void 687 ehci_hub_descriptor ( 688 struct ehci_hcd *ehci, 689 struct usb_hub_descriptor *desc 690 ) { 691 int ports = HCS_N_PORTS (ehci->hcs_params); 692 u16 temp; 693 694 desc->bDescriptorType = USB_DT_HUB; 695 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ 696 desc->bHubContrCurrent = 0; 697 698 desc->bNbrPorts = ports; 699 temp = 1 + (ports / 8); 700 desc->bDescLength = 7 + 2 * temp; 701 702 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ 703 memset(&desc->u.hs.DeviceRemovable[0], 0, temp); 704 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); 705 706 temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ 707 if (HCS_PPC (ehci->hcs_params)) 708 temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ 709 else 710 temp |= HUB_CHAR_NO_LPSM; /* no power switching */ 711 #if 0 712 // re-enable when we support USB_PORT_FEAT_INDICATOR below. 713 if (HCS_INDICATOR (ehci->hcs_params)) 714 temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ 715 #endif 716 desc->wHubCharacteristics = cpu_to_le16(temp); 717 } 718 719 /*-------------------------------------------------------------------------*/ 720 #ifdef CONFIG_USB_HCD_TEST_MODE 721 722 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06 723 724 static void usb_ehset_completion(struct urb *urb) 725 { 726 struct completion *done = urb->context; 727 728 complete(done); 729 } 730 static int submit_single_step_set_feature( 731 struct usb_hcd *hcd, 732 struct urb *urb, 733 int is_setup 734 ); 735 736 /* 737 * Allocate and initialize a control URB. This request will be used by the 738 * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages 739 * of the GetDescriptor request are sent 15 seconds after the SETUP stage. 740 * Return NULL if failed. 741 */ 742 static struct urb *request_single_step_set_feature_urb( 743 struct usb_device *udev, 744 void *dr, 745 void *buf, 746 struct completion *done 747 ) { 748 struct urb *urb; 749 struct usb_hcd *hcd = bus_to_hcd(udev->bus); 750 struct usb_host_endpoint *ep; 751 752 urb = usb_alloc_urb(0, GFP_KERNEL); 753 if (!urb) 754 return NULL; 755 756 urb->pipe = usb_rcvctrlpipe(udev, 0); 757 ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out) 758 [usb_pipeendpoint(urb->pipe)]; 759 if (!ep) { 760 usb_free_urb(urb); 761 return NULL; 762 } 763 764 urb->ep = ep; 765 urb->dev = udev; 766 urb->setup_packet = (void *)dr; 767 urb->transfer_buffer = buf; 768 urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; 769 urb->complete = usb_ehset_completion; 770 urb->status = -EINPROGRESS; 771 urb->actual_length = 0; 772 urb->transfer_flags = URB_DIR_IN; 773 usb_get_urb(urb); 774 atomic_inc(&urb->use_count); 775 atomic_inc(&urb->dev->urbnum); 776 urb->setup_dma = dma_map_single( 777 hcd->self.controller, 778 urb->setup_packet, 779 sizeof(struct usb_ctrlrequest), 780 DMA_TO_DEVICE); 781 urb->transfer_dma = dma_map_single( 782 hcd->self.controller, 783 urb->transfer_buffer, 784 urb->transfer_buffer_length, 785 DMA_FROM_DEVICE); 786 urb->context = done; 787 return urb; 788 } 789 790 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) 791 { 792 int retval = -ENOMEM; 793 struct usb_ctrlrequest *dr; 794 struct urb *urb; 795 struct usb_device *udev; 796 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 797 struct usb_device_descriptor *buf; 798 DECLARE_COMPLETION_ONSTACK(done); 799 800 /* Obtain udev of the rhub's child port */ 801 udev = usb_hub_find_child(hcd->self.root_hub, port); 802 if (!udev) { 803 ehci_err(ehci, "No device attached to the RootHub\n"); 804 return -ENODEV; 805 } 806 buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); 807 if (!buf) 808 return -ENOMEM; 809 810 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); 811 if (!dr) { 812 kfree(buf); 813 return -ENOMEM; 814 } 815 816 /* Fill Setup packet for GetDescriptor */ 817 dr->bRequestType = USB_DIR_IN; 818 dr->bRequest = USB_REQ_GET_DESCRIPTOR; 819 dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); 820 dr->wIndex = 0; 821 dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); 822 urb = request_single_step_set_feature_urb(udev, dr, buf, &done); 823 if (!urb) 824 goto cleanup; 825 826 /* Submit just the SETUP stage */ 827 retval = submit_single_step_set_feature(hcd, urb, 1); 828 if (retval) 829 goto out1; 830 if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { 831 usb_kill_urb(urb); 832 retval = -ETIMEDOUT; 833 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__); 834 goto out1; 835 } 836 msleep(15 * 1000); 837 838 /* Complete remaining DATA and STATUS stages using the same URB */ 839 urb->status = -EINPROGRESS; 840 usb_get_urb(urb); 841 atomic_inc(&urb->use_count); 842 atomic_inc(&urb->dev->urbnum); 843 retval = submit_single_step_set_feature(hcd, urb, 0); 844 if (!retval && !wait_for_completion_timeout(&done, 845 msecs_to_jiffies(2000))) { 846 usb_kill_urb(urb); 847 retval = -ETIMEDOUT; 848 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__); 849 } 850 out1: 851 usb_free_urb(urb); 852 cleanup: 853 kfree(dr); 854 kfree(buf); 855 return retval; 856 } 857 #endif /* CONFIG_USB_HCD_TEST_MODE */ 858 /*-------------------------------------------------------------------------*/ 859 860 int ehci_hub_control( 861 struct usb_hcd *hcd, 862 u16 typeReq, 863 u16 wValue, 864 u16 wIndex, 865 char *buf, 866 u16 wLength 867 ) { 868 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 869 int ports = HCS_N_PORTS (ehci->hcs_params); 870 u32 __iomem *status_reg, *hostpc_reg; 871 u32 temp, temp1, status; 872 unsigned long flags; 873 int retval = 0; 874 unsigned selector; 875 876 /* 877 * Avoid underflow while calculating (wIndex & 0xff) - 1. 878 * The compiler might deduce that wIndex can never be 0 and then 879 * optimize away the tests for !wIndex below. 880 */ 881 temp = wIndex & 0xff; 882 temp -= (temp > 0); 883 status_reg = &ehci->regs->port_status[temp]; 884 hostpc_reg = &ehci->regs->hostpc[temp]; 885 886 /* 887 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. 888 * HCS_INDICATOR may say we can change LEDs to off/amber/green. 889 * (track current state ourselves) ... blink for diagnostics, 890 * power, "this is the one", etc. EHCI spec supports this. 891 */ 892 893 spin_lock_irqsave (&ehci->lock, flags); 894 switch (typeReq) { 895 case ClearHubFeature: 896 switch (wValue) { 897 case C_HUB_LOCAL_POWER: 898 case C_HUB_OVER_CURRENT: 899 /* no hub-wide feature/status flags */ 900 break; 901 default: 902 goto error; 903 } 904 break; 905 case ClearPortFeature: 906 if (!wIndex || wIndex > ports) 907 goto error; 908 wIndex--; 909 temp = ehci_readl(ehci, status_reg); 910 temp &= ~PORT_RWC_BITS; 911 912 /* 913 * Even if OWNER is set, so the port is owned by the 914 * companion controller, hub_wq needs to be able to clear 915 * the port-change status bits (especially 916 * USB_PORT_STAT_C_CONNECTION). 917 */ 918 919 switch (wValue) { 920 case USB_PORT_FEAT_ENABLE: 921 ehci_writel(ehci, temp & ~PORT_PE, status_reg); 922 break; 923 case USB_PORT_FEAT_C_ENABLE: 924 ehci_writel(ehci, temp | PORT_PEC, status_reg); 925 break; 926 case USB_PORT_FEAT_SUSPEND: 927 if (temp & PORT_RESET) 928 goto error; 929 if (ehci->no_selective_suspend) 930 break; 931 #ifdef CONFIG_USB_OTG 932 if ((hcd->self.otg_port == (wIndex + 1)) 933 && hcd->self.b_hnp_enable) { 934 otg_start_hnp(hcd->usb_phy->otg); 935 break; 936 } 937 #endif 938 if (!(temp & PORT_SUSPEND)) 939 break; 940 if ((temp & PORT_PE) == 0) 941 goto error; 942 943 /* clear phy low-power mode before resume */ 944 if (ehci->has_tdi_phy_lpm) { 945 temp1 = ehci_readl(ehci, hostpc_reg); 946 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, 947 hostpc_reg); 948 spin_unlock_irqrestore(&ehci->lock, flags); 949 msleep(5);/* wait to leave low-power mode */ 950 spin_lock_irqsave(&ehci->lock, flags); 951 } 952 /* resume signaling for 20 msec */ 953 temp &= ~PORT_WAKE_BITS; 954 ehci_writel(ehci, temp | PORT_RESUME, status_reg); 955 ehci->reset_done[wIndex] = jiffies 956 + msecs_to_jiffies(USB_RESUME_TIMEOUT); 957 set_bit(wIndex, &ehci->resuming_ports); 958 usb_hcd_start_port_resume(&hcd->self, wIndex); 959 break; 960 case USB_PORT_FEAT_C_SUSPEND: 961 clear_bit(wIndex, &ehci->port_c_suspend); 962 break; 963 case USB_PORT_FEAT_POWER: 964 if (HCS_PPC(ehci->hcs_params)) { 965 spin_unlock_irqrestore(&ehci->lock, flags); 966 ehci_port_power(ehci, wIndex, false); 967 spin_lock_irqsave(&ehci->lock, flags); 968 } 969 break; 970 case USB_PORT_FEAT_C_CONNECTION: 971 ehci_writel(ehci, temp | PORT_CSC, status_reg); 972 break; 973 case USB_PORT_FEAT_C_OVER_CURRENT: 974 ehci_writel(ehci, temp | PORT_OCC, status_reg); 975 break; 976 case USB_PORT_FEAT_C_RESET: 977 /* GetPortStatus clears reset */ 978 break; 979 default: 980 goto error; 981 } 982 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ 983 break; 984 case GetHubDescriptor: 985 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) 986 buf); 987 break; 988 case GetHubStatus: 989 /* no hub-wide feature/status flags */ 990 memset (buf, 0, 4); 991 //cpu_to_le32s ((u32 *) buf); 992 break; 993 case GetPortStatus: 994 if (!wIndex || wIndex > ports) 995 goto error; 996 wIndex--; 997 status = 0; 998 temp = ehci_readl(ehci, status_reg); 999 1000 // wPortChange bits 1001 if (temp & PORT_CSC) 1002 status |= USB_PORT_STAT_C_CONNECTION << 16; 1003 if (temp & PORT_PEC) 1004 status |= USB_PORT_STAT_C_ENABLE << 16; 1005 1006 if ((temp & PORT_OCC) && !ignore_oc){ 1007 status |= USB_PORT_STAT_C_OVERCURRENT << 16; 1008 1009 /* 1010 * Hubs should disable port power on over-current. 1011 * However, not all EHCI implementations do this 1012 * automatically, even if they _do_ support per-port 1013 * power switching; they're allowed to just limit the 1014 * current. hub_wq will turn the power back on. 1015 */ 1016 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) 1017 && HCS_PPC(ehci->hcs_params)) { 1018 spin_unlock_irqrestore(&ehci->lock, flags); 1019 ehci_port_power(ehci, wIndex, false); 1020 spin_lock_irqsave(&ehci->lock, flags); 1021 temp = ehci_readl(ehci, status_reg); 1022 } 1023 } 1024 1025 /* no reset or resume pending */ 1026 if (!ehci->reset_done[wIndex]) { 1027 1028 /* Remote Wakeup received? */ 1029 if (temp & PORT_RESUME) { 1030 /* resume signaling for 20 msec */ 1031 ehci->reset_done[wIndex] = jiffies 1032 + msecs_to_jiffies(20); 1033 usb_hcd_start_port_resume(&hcd->self, wIndex); 1034 set_bit(wIndex, &ehci->resuming_ports); 1035 /* check the port again */ 1036 mod_timer(&ehci_to_hcd(ehci)->rh_timer, 1037 ehci->reset_done[wIndex]); 1038 } 1039 1040 /* reset or resume not yet complete */ 1041 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { 1042 ; /* wait until it is complete */ 1043 1044 /* resume completed */ 1045 } else if (test_bit(wIndex, &ehci->resuming_ports)) { 1046 clear_bit(wIndex, &ehci->suspended_ports); 1047 set_bit(wIndex, &ehci->port_c_suspend); 1048 ehci->reset_done[wIndex] = 0; 1049 usb_hcd_end_port_resume(&hcd->self, wIndex); 1050 1051 /* stop resume signaling */ 1052 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); 1053 ehci_writel(ehci, temp, status_reg); 1054 clear_bit(wIndex, &ehci->resuming_ports); 1055 retval = ehci_handshake(ehci, status_reg, 1056 PORT_RESUME, 0, 2000 /* 2msec */); 1057 if (retval != 0) { 1058 ehci_err(ehci, "port %d resume error %d\n", 1059 wIndex + 1, retval); 1060 goto error; 1061 } 1062 temp = ehci_readl(ehci, status_reg); 1063 1064 /* whoever resets must GetPortStatus to complete it!! */ 1065 } else { 1066 status |= USB_PORT_STAT_C_RESET << 16; 1067 ehci->reset_done [wIndex] = 0; 1068 1069 /* force reset to complete */ 1070 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), 1071 status_reg); 1072 /* REVISIT: some hardware needs 550+ usec to clear 1073 * this bit; seems too long to spin routinely... 1074 */ 1075 retval = ehci_handshake(ehci, status_reg, 1076 PORT_RESET, 0, 1000); 1077 if (retval != 0) { 1078 ehci_err (ehci, "port %d reset error %d\n", 1079 wIndex + 1, retval); 1080 goto error; 1081 } 1082 1083 /* see what we found out */ 1084 temp = check_reset_complete (ehci, wIndex, status_reg, 1085 ehci_readl(ehci, status_reg)); 1086 } 1087 1088 /* transfer dedicated ports to the companion hc */ 1089 if ((temp & PORT_CONNECT) && 1090 test_bit(wIndex, &ehci->companion_ports)) { 1091 temp &= ~PORT_RWC_BITS; 1092 temp |= PORT_OWNER; 1093 ehci_writel(ehci, temp, status_reg); 1094 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); 1095 temp = ehci_readl(ehci, status_reg); 1096 } 1097 1098 /* 1099 * Even if OWNER is set, there's no harm letting hub_wq 1100 * see the wPortStatus values (they should all be 0 except 1101 * for PORT_POWER anyway). 1102 */ 1103 1104 if (temp & PORT_CONNECT) { 1105 status |= USB_PORT_STAT_CONNECTION; 1106 // status may be from integrated TT 1107 if (ehci->has_hostpc) { 1108 temp1 = ehci_readl(ehci, hostpc_reg); 1109 status |= ehci_port_speed(ehci, temp1); 1110 } else 1111 status |= ehci_port_speed(ehci, temp); 1112 } 1113 if (temp & PORT_PE) 1114 status |= USB_PORT_STAT_ENABLE; 1115 1116 /* maybe the port was unsuspended without our knowledge */ 1117 if (temp & (PORT_SUSPEND|PORT_RESUME)) { 1118 status |= USB_PORT_STAT_SUSPEND; 1119 } else if (test_bit(wIndex, &ehci->suspended_ports)) { 1120 clear_bit(wIndex, &ehci->suspended_ports); 1121 clear_bit(wIndex, &ehci->resuming_ports); 1122 ehci->reset_done[wIndex] = 0; 1123 if (temp & PORT_PE) 1124 set_bit(wIndex, &ehci->port_c_suspend); 1125 usb_hcd_end_port_resume(&hcd->self, wIndex); 1126 } 1127 1128 if (temp & PORT_OC) 1129 status |= USB_PORT_STAT_OVERCURRENT; 1130 if (temp & PORT_RESET) 1131 status |= USB_PORT_STAT_RESET; 1132 if (temp & PORT_POWER) 1133 status |= USB_PORT_STAT_POWER; 1134 if (test_bit(wIndex, &ehci->port_c_suspend)) 1135 status |= USB_PORT_STAT_C_SUSPEND << 16; 1136 1137 if (status & ~0xffff) /* only if wPortChange is interesting */ 1138 dbg_port(ehci, "GetStatus", wIndex + 1, temp); 1139 put_unaligned_le32(status, buf); 1140 break; 1141 case SetHubFeature: 1142 switch (wValue) { 1143 case C_HUB_LOCAL_POWER: 1144 case C_HUB_OVER_CURRENT: 1145 /* no hub-wide feature/status flags */ 1146 break; 1147 default: 1148 goto error; 1149 } 1150 break; 1151 case SetPortFeature: 1152 selector = wIndex >> 8; 1153 wIndex &= 0xff; 1154 if (unlikely(ehci->debug)) { 1155 /* If the debug port is active any port 1156 * feature requests should get denied */ 1157 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && 1158 (readl(&ehci->debug->control) & DBGP_ENABLED)) { 1159 retval = -ENODEV; 1160 goto error_exit; 1161 } 1162 } 1163 if (!wIndex || wIndex > ports) 1164 goto error; 1165 wIndex--; 1166 temp = ehci_readl(ehci, status_reg); 1167 if (temp & PORT_OWNER) 1168 break; 1169 1170 temp &= ~PORT_RWC_BITS; 1171 switch (wValue) { 1172 case USB_PORT_FEAT_SUSPEND: 1173 if (ehci->no_selective_suspend) 1174 break; 1175 if ((temp & PORT_PE) == 0 1176 || (temp & PORT_RESET) != 0) 1177 goto error; 1178 1179 /* After above check the port must be connected. 1180 * Set appropriate bit thus could put phy into low power 1181 * mode if we have tdi_phy_lpm feature 1182 */ 1183 temp &= ~PORT_WKCONN_E; 1184 temp |= PORT_WKDISC_E | PORT_WKOC_E; 1185 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); 1186 if (ehci->has_tdi_phy_lpm) { 1187 spin_unlock_irqrestore(&ehci->lock, flags); 1188 msleep(5);/* 5ms for HCD enter low pwr mode */ 1189 spin_lock_irqsave(&ehci->lock, flags); 1190 temp1 = ehci_readl(ehci, hostpc_reg); 1191 ehci_writel(ehci, temp1 | HOSTPC_PHCD, 1192 hostpc_reg); 1193 temp1 = ehci_readl(ehci, hostpc_reg); 1194 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", 1195 wIndex, (temp1 & HOSTPC_PHCD) ? 1196 "succeeded" : "failed"); 1197 } 1198 if (ehci_has_fsl_susp_errata(ehci)) { 1199 /* 10ms for HCD enter suspend */ 1200 spin_unlock_irqrestore(&ehci->lock, flags); 1201 usleep_range(10000, 20000); 1202 spin_lock_irqsave(&ehci->lock, flags); 1203 } 1204 set_bit(wIndex, &ehci->suspended_ports); 1205 break; 1206 case USB_PORT_FEAT_POWER: 1207 if (HCS_PPC(ehci->hcs_params)) { 1208 spin_unlock_irqrestore(&ehci->lock, flags); 1209 ehci_port_power(ehci, wIndex, true); 1210 spin_lock_irqsave(&ehci->lock, flags); 1211 } 1212 break; 1213 case USB_PORT_FEAT_RESET: 1214 if (temp & (PORT_SUSPEND|PORT_RESUME)) 1215 goto error; 1216 /* line status bits may report this as low speed, 1217 * which can be fine if this root hub has a 1218 * transaction translator built in. 1219 */ 1220 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT 1221 && !ehci_is_TDI(ehci) 1222 && PORT_USB11 (temp)) { 1223 ehci_dbg (ehci, 1224 "port %d low speed --> companion\n", 1225 wIndex + 1); 1226 temp |= PORT_OWNER; 1227 } else { 1228 temp |= PORT_RESET; 1229 temp &= ~PORT_PE; 1230 1231 /* 1232 * caller must wait, then call GetPortStatus 1233 * usb 2.0 spec says 50 ms resets on root 1234 */ 1235 ehci->reset_done [wIndex] = jiffies 1236 + msecs_to_jiffies (50); 1237 1238 /* 1239 * Force full-speed connect for FSL high-speed 1240 * erratum; disable HS Chirp by setting PFSC bit 1241 */ 1242 if (ehci_has_fsl_hs_errata(ehci)) 1243 temp |= (1 << PORTSC_FSL_PFSC); 1244 } 1245 ehci_writel(ehci, temp, status_reg); 1246 break; 1247 1248 /* For downstream facing ports (these): one hub port is put 1249 * into test mode according to USB2 11.24.2.13, then the hub 1250 * must be reset (which for root hub now means rmmod+modprobe, 1251 * or else system reboot). See EHCI 2.3.9 and 4.14 for info 1252 * about the EHCI-specific stuff. 1253 */ 1254 case USB_PORT_FEAT_TEST: 1255 #ifdef CONFIG_USB_HCD_TEST_MODE 1256 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { 1257 spin_unlock_irqrestore(&ehci->lock, flags); 1258 retval = ehset_single_step_set_feature(hcd, 1259 wIndex + 1); 1260 spin_lock_irqsave(&ehci->lock, flags); 1261 break; 1262 } 1263 #endif 1264 if (!selector || selector > 5) 1265 goto error; 1266 spin_unlock_irqrestore(&ehci->lock, flags); 1267 ehci_quiesce(ehci); 1268 spin_lock_irqsave(&ehci->lock, flags); 1269 1270 /* Put all enabled ports into suspend */ 1271 while (ports--) { 1272 u32 __iomem *sreg = 1273 &ehci->regs->port_status[ports]; 1274 1275 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; 1276 if (temp & PORT_PE) 1277 ehci_writel(ehci, temp | PORT_SUSPEND, 1278 sreg); 1279 } 1280 1281 spin_unlock_irqrestore(&ehci->lock, flags); 1282 ehci_halt(ehci); 1283 spin_lock_irqsave(&ehci->lock, flags); 1284 1285 temp = ehci_readl(ehci, status_reg); 1286 temp |= selector << 16; 1287 ehci_writel(ehci, temp, status_reg); 1288 break; 1289 1290 default: 1291 goto error; 1292 } 1293 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ 1294 break; 1295 1296 default: 1297 error: 1298 /* "stall" on error */ 1299 retval = -EPIPE; 1300 } 1301 error_exit: 1302 spin_unlock_irqrestore (&ehci->lock, flags); 1303 return retval; 1304 } 1305 EXPORT_SYMBOL_GPL(ehci_hub_control); 1306 1307 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) 1308 { 1309 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 1310 1311 if (ehci_is_TDI(ehci)) 1312 return; 1313 set_owner(ehci, --portnum, PORT_OWNER); 1314 } 1315 1316 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) 1317 { 1318 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 1319 u32 __iomem *reg; 1320 1321 if (ehci_is_TDI(ehci)) 1322 return 0; 1323 reg = &ehci->regs->port_status[portnum - 1]; 1324 return ehci_readl(ehci, reg) & PORT_OWNER; 1325 } 1326 1327 static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) 1328 { 1329 struct usb_hcd *hcd = ehci_to_hcd(ehci); 1330 u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; 1331 u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; 1332 1333 if (enable) 1334 ehci_writel(ehci, temp | PORT_POWER, status_reg); 1335 else 1336 ehci_writel(ehci, temp & ~PORT_POWER, status_reg); 1337 1338 if (hcd->driver->port_power) 1339 hcd->driver->port_power(hcd, portnum, enable); 1340 1341 return 0; 1342 } 1343