1 /* 2 * Copyright (C) 2001-2004 by David Brownell 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the 6 * Free Software Foundation; either version 2 of the License, or (at your 7 * option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software Foundation, 16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19 /* this file is part of ehci-hcd.c */ 20 21 /*-------------------------------------------------------------------------*/ 22 23 /* 24 * EHCI Root Hub ... the nonsharable stuff 25 * 26 * Registers don't need cpu_to_le32, that happens transparently 27 */ 28 29 /*-------------------------------------------------------------------------*/ 30 #include <linux/usb/otg.h> 31 32 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) 33 34 #ifdef CONFIG_PM 35 36 static int persist_enabled_on_companion(struct usb_device *udev, void *unused) 37 { 38 return !udev->maxchild && udev->persist_enabled && 39 udev->bus->root_hub->speed < USB_SPEED_HIGH; 40 } 41 42 /* After a power loss, ports that were owned by the companion must be 43 * reset so that the companion can still own them. 44 */ 45 static void ehci_handover_companion_ports(struct ehci_hcd *ehci) 46 { 47 u32 __iomem *reg; 48 u32 status; 49 int port; 50 __le32 buf; 51 struct usb_hcd *hcd = ehci_to_hcd(ehci); 52 53 if (!ehci->owned_ports) 54 return; 55 56 /* 57 * USB 1.1 devices are mostly HIDs, which don't need to persist across 58 * suspends. If we ensure that none of our companion's devices have 59 * persist_enabled (by looking through all USB 1.1 buses in the system), 60 * we can skip this and avoid slowing resume down. Devices without 61 * persist will just get reenumerated shortly after resume anyway. 62 */ 63 if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) 64 return; 65 66 /* Make sure the ports are powered */ 67 port = HCS_N_PORTS(ehci->hcs_params); 68 while (port--) { 69 if (test_bit(port, &ehci->owned_ports)) { 70 reg = &ehci->regs->port_status[port]; 71 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 72 if (!(status & PORT_POWER)) 73 ehci_port_power(ehci, port, true); 74 } 75 } 76 77 /* Give the connections some time to appear */ 78 msleep(20); 79 80 spin_lock_irq(&ehci->lock); 81 port = HCS_N_PORTS(ehci->hcs_params); 82 while (port--) { 83 if (test_bit(port, &ehci->owned_ports)) { 84 reg = &ehci->regs->port_status[port]; 85 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 86 87 /* Port already owned by companion? */ 88 if (status & PORT_OWNER) 89 clear_bit(port, &ehci->owned_ports); 90 else if (test_bit(port, &ehci->companion_ports)) 91 ehci_writel(ehci, status & ~PORT_PE, reg); 92 else { 93 spin_unlock_irq(&ehci->lock); 94 ehci_hub_control(hcd, SetPortFeature, 95 USB_PORT_FEAT_RESET, port + 1, 96 NULL, 0); 97 spin_lock_irq(&ehci->lock); 98 } 99 } 100 } 101 spin_unlock_irq(&ehci->lock); 102 103 if (!ehci->owned_ports) 104 return; 105 msleep(90); /* Wait for resets to complete */ 106 107 spin_lock_irq(&ehci->lock); 108 port = HCS_N_PORTS(ehci->hcs_params); 109 while (port--) { 110 if (test_bit(port, &ehci->owned_ports)) { 111 spin_unlock_irq(&ehci->lock); 112 ehci_hub_control(hcd, GetPortStatus, 113 0, port + 1, 114 (char *) &buf, sizeof(buf)); 115 spin_lock_irq(&ehci->lock); 116 117 /* The companion should now own the port, 118 * but if something went wrong the port must not 119 * remain enabled. 120 */ 121 reg = &ehci->regs->port_status[port]; 122 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 123 if (status & PORT_OWNER) 124 ehci_writel(ehci, status | PORT_CSC, reg); 125 else { 126 ehci_dbg(ehci, "failed handover port %d: %x\n", 127 port + 1, status); 128 ehci_writel(ehci, status & ~PORT_PE, reg); 129 } 130 } 131 } 132 133 ehci->owned_ports = 0; 134 spin_unlock_irq(&ehci->lock); 135 } 136 137 static int ehci_port_change(struct ehci_hcd *ehci) 138 { 139 int i = HCS_N_PORTS(ehci->hcs_params); 140 141 /* First check if the controller indicates a change event */ 142 143 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) 144 return 1; 145 146 /* 147 * Not all controllers appear to update this while going from D3 to D0, 148 * so check the individual port status registers as well 149 */ 150 151 while (i--) 152 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) 153 return 1; 154 155 return 0; 156 } 157 158 static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, 159 bool suspending, bool do_wakeup) 160 { 161 int port; 162 u32 temp; 163 164 /* If remote wakeup is enabled for the root hub but disabled 165 * for the controller, we must adjust all the port wakeup flags 166 * when the controller is suspended or resumed. In all other 167 * cases they don't need to be changed. 168 */ 169 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) 170 return; 171 172 spin_lock_irq(&ehci->lock); 173 174 /* clear phy low-power mode before changing wakeup flags */ 175 if (ehci->has_tdi_phy_lpm) { 176 port = HCS_N_PORTS(ehci->hcs_params); 177 while (port--) { 178 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 179 180 temp = ehci_readl(ehci, hostpc_reg); 181 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); 182 } 183 spin_unlock_irq(&ehci->lock); 184 msleep(5); 185 spin_lock_irq(&ehci->lock); 186 } 187 188 port = HCS_N_PORTS(ehci->hcs_params); 189 while (port--) { 190 u32 __iomem *reg = &ehci->regs->port_status[port]; 191 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 192 u32 t2 = t1 & ~PORT_WAKE_BITS; 193 194 /* If we are suspending the controller, clear the flags. 195 * If we are resuming the controller, set the wakeup flags. 196 */ 197 if (!suspending) { 198 if (t1 & PORT_CONNECT) 199 t2 |= PORT_WKOC_E | PORT_WKDISC_E; 200 else 201 t2 |= PORT_WKOC_E | PORT_WKCONN_E; 202 } 203 ehci_writel(ehci, t2, reg); 204 } 205 206 /* enter phy low-power mode again */ 207 if (ehci->has_tdi_phy_lpm) { 208 port = HCS_N_PORTS(ehci->hcs_params); 209 while (port--) { 210 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 211 212 temp = ehci_readl(ehci, hostpc_reg); 213 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); 214 } 215 } 216 217 /* Does the root hub have a port wakeup pending? */ 218 if (!suspending && ehci_port_change(ehci)) 219 usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); 220 221 spin_unlock_irq(&ehci->lock); 222 } 223 224 static int ehci_bus_suspend (struct usb_hcd *hcd) 225 { 226 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 227 int port; 228 int mask; 229 int changed; 230 bool fs_idle_delay; 231 232 ehci_dbg(ehci, "suspend root hub\n"); 233 234 if (time_before (jiffies, ehci->next_statechange)) 235 msleep(5); 236 237 /* stop the schedules */ 238 ehci_quiesce(ehci); 239 240 spin_lock_irq (&ehci->lock); 241 if (ehci->rh_state < EHCI_RH_RUNNING) 242 goto done; 243 244 /* Once the controller is stopped, port resumes that are already 245 * in progress won't complete. Hence if remote wakeup is enabled 246 * for the root hub and any ports are in the middle of a resume or 247 * remote wakeup, we must fail the suspend. 248 */ 249 if (hcd->self.root_hub->do_remote_wakeup) { 250 if (ehci->resuming_ports) { 251 spin_unlock_irq(&ehci->lock); 252 ehci_dbg(ehci, "suspend failed because a port is resuming\n"); 253 return -EBUSY; 254 } 255 } 256 257 /* Unlike other USB host controller types, EHCI doesn't have 258 * any notion of "global" or bus-wide suspend. The driver has 259 * to manually suspend all the active unsuspended ports, and 260 * then manually resume them in the bus_resume() routine. 261 */ 262 ehci->bus_suspended = 0; 263 ehci->owned_ports = 0; 264 changed = 0; 265 fs_idle_delay = false; 266 port = HCS_N_PORTS(ehci->hcs_params); 267 while (port--) { 268 u32 __iomem *reg = &ehci->regs->port_status [port]; 269 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 270 u32 t2 = t1 & ~PORT_WAKE_BITS; 271 272 /* keep track of which ports we suspend */ 273 if (t1 & PORT_OWNER) 274 set_bit(port, &ehci->owned_ports); 275 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { 276 t2 |= PORT_SUSPEND; 277 set_bit(port, &ehci->bus_suspended); 278 } 279 280 /* enable remote wakeup on all ports, if told to do so */ 281 if (hcd->self.root_hub->do_remote_wakeup) { 282 /* only enable appropriate wake bits, otherwise the 283 * hardware can not go phy low power mode. If a race 284 * condition happens here(connection change during bits 285 * set), the port change detection will finally fix it. 286 */ 287 if (t1 & PORT_CONNECT) 288 t2 |= PORT_WKOC_E | PORT_WKDISC_E; 289 else 290 t2 |= PORT_WKOC_E | PORT_WKCONN_E; 291 } 292 293 if (t1 != t2) { 294 /* 295 * On some controllers, Wake-On-Disconnect will 296 * generate false wakeup signals until the bus 297 * switches over to full-speed idle. For their 298 * sake, add a delay if we need one. 299 */ 300 if ((t2 & PORT_WKDISC_E) && 301 ehci_port_speed(ehci, t2) == 302 USB_PORT_STAT_HIGH_SPEED) 303 fs_idle_delay = true; 304 ehci_writel(ehci, t2, reg); 305 changed = 1; 306 } 307 } 308 spin_unlock_irq(&ehci->lock); 309 310 if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { 311 /* 312 * Wait for HCD to enter low-power mode or for the bus 313 * to switch to full-speed idle. 314 */ 315 usleep_range(5000, 5500); 316 } 317 318 if (changed && ehci->has_tdi_phy_lpm) { 319 spin_lock_irq(&ehci->lock); 320 port = HCS_N_PORTS(ehci->hcs_params); 321 while (port--) { 322 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 323 u32 t3; 324 325 t3 = ehci_readl(ehci, hostpc_reg); 326 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); 327 t3 = ehci_readl(ehci, hostpc_reg); 328 ehci_dbg(ehci, "Port %d phy low-power mode %s\n", 329 port, (t3 & HOSTPC_PHCD) ? 330 "succeeded" : "failed"); 331 } 332 spin_unlock_irq(&ehci->lock); 333 } 334 335 /* Apparently some devices need a >= 1-uframe delay here */ 336 if (ehci->bus_suspended) 337 udelay(150); 338 339 /* turn off now-idle HC */ 340 ehci_halt (ehci); 341 342 spin_lock_irq(&ehci->lock); 343 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) 344 ehci_handle_controller_death(ehci); 345 if (ehci->rh_state != EHCI_RH_RUNNING) 346 goto done; 347 ehci->rh_state = EHCI_RH_SUSPENDED; 348 349 end_unlink_async(ehci); 350 unlink_empty_async_suspended(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 = &ehci->regs->port_status[ 871 (wIndex & 0xff) - 1]; 872 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1]; 873 u32 temp, temp1, status; 874 unsigned long flags; 875 int retval = 0; 876 unsigned selector; 877 878 /* 879 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. 880 * HCS_INDICATOR may say we can change LEDs to off/amber/green. 881 * (track current state ourselves) ... blink for diagnostics, 882 * power, "this is the one", etc. EHCI spec supports this. 883 */ 884 885 spin_lock_irqsave (&ehci->lock, flags); 886 switch (typeReq) { 887 case ClearHubFeature: 888 switch (wValue) { 889 case C_HUB_LOCAL_POWER: 890 case C_HUB_OVER_CURRENT: 891 /* no hub-wide feature/status flags */ 892 break; 893 default: 894 goto error; 895 } 896 break; 897 case ClearPortFeature: 898 if (!wIndex || wIndex > ports) 899 goto error; 900 wIndex--; 901 temp = ehci_readl(ehci, status_reg); 902 temp &= ~PORT_RWC_BITS; 903 904 /* 905 * Even if OWNER is set, so the port is owned by the 906 * companion controller, hub_wq needs to be able to clear 907 * the port-change status bits (especially 908 * USB_PORT_STAT_C_CONNECTION). 909 */ 910 911 switch (wValue) { 912 case USB_PORT_FEAT_ENABLE: 913 ehci_writel(ehci, temp & ~PORT_PE, status_reg); 914 break; 915 case USB_PORT_FEAT_C_ENABLE: 916 ehci_writel(ehci, temp | PORT_PEC, status_reg); 917 break; 918 case USB_PORT_FEAT_SUSPEND: 919 if (temp & PORT_RESET) 920 goto error; 921 if (ehci->no_selective_suspend) 922 break; 923 #ifdef CONFIG_USB_OTG 924 if ((hcd->self.otg_port == (wIndex + 1)) 925 && hcd->self.b_hnp_enable) { 926 otg_start_hnp(hcd->usb_phy->otg); 927 break; 928 } 929 #endif 930 if (!(temp & PORT_SUSPEND)) 931 break; 932 if ((temp & PORT_PE) == 0) 933 goto error; 934 935 /* clear phy low-power mode before resume */ 936 if (ehci->has_tdi_phy_lpm) { 937 temp1 = ehci_readl(ehci, hostpc_reg); 938 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, 939 hostpc_reg); 940 spin_unlock_irqrestore(&ehci->lock, flags); 941 msleep(5);/* wait to leave low-power mode */ 942 spin_lock_irqsave(&ehci->lock, flags); 943 } 944 /* resume signaling for 20 msec */ 945 temp &= ~PORT_WAKE_BITS; 946 ehci_writel(ehci, temp | PORT_RESUME, status_reg); 947 ehci->reset_done[wIndex] = jiffies 948 + msecs_to_jiffies(USB_RESUME_TIMEOUT); 949 set_bit(wIndex, &ehci->resuming_ports); 950 usb_hcd_start_port_resume(&hcd->self, wIndex); 951 break; 952 case USB_PORT_FEAT_C_SUSPEND: 953 clear_bit(wIndex, &ehci->port_c_suspend); 954 break; 955 case USB_PORT_FEAT_POWER: 956 if (HCS_PPC(ehci->hcs_params)) { 957 spin_unlock_irqrestore(&ehci->lock, flags); 958 ehci_port_power(ehci, wIndex, false); 959 spin_lock_irqsave(&ehci->lock, flags); 960 } 961 break; 962 case USB_PORT_FEAT_C_CONNECTION: 963 ehci_writel(ehci, temp | PORT_CSC, status_reg); 964 break; 965 case USB_PORT_FEAT_C_OVER_CURRENT: 966 ehci_writel(ehci, temp | PORT_OCC, status_reg); 967 break; 968 case USB_PORT_FEAT_C_RESET: 969 /* GetPortStatus clears reset */ 970 break; 971 default: 972 goto error; 973 } 974 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ 975 break; 976 case GetHubDescriptor: 977 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) 978 buf); 979 break; 980 case GetHubStatus: 981 /* no hub-wide feature/status flags */ 982 memset (buf, 0, 4); 983 //cpu_to_le32s ((u32 *) buf); 984 break; 985 case GetPortStatus: 986 if (!wIndex || wIndex > ports) 987 goto error; 988 wIndex--; 989 status = 0; 990 temp = ehci_readl(ehci, status_reg); 991 992 // wPortChange bits 993 if (temp & PORT_CSC) 994 status |= USB_PORT_STAT_C_CONNECTION << 16; 995 if (temp & PORT_PEC) 996 status |= USB_PORT_STAT_C_ENABLE << 16; 997 998 if ((temp & PORT_OCC) && !ignore_oc){ 999 status |= USB_PORT_STAT_C_OVERCURRENT << 16; 1000 1001 /* 1002 * Hubs should disable port power on over-current. 1003 * However, not all EHCI implementations do this 1004 * automatically, even if they _do_ support per-port 1005 * power switching; they're allowed to just limit the 1006 * current. hub_wq will turn the power back on. 1007 */ 1008 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) 1009 && HCS_PPC(ehci->hcs_params)) { 1010 spin_unlock_irqrestore(&ehci->lock, flags); 1011 ehci_port_power(ehci, wIndex, false); 1012 spin_lock_irqsave(&ehci->lock, flags); 1013 temp = ehci_readl(ehci, status_reg); 1014 } 1015 } 1016 1017 /* no reset or resume pending */ 1018 if (!ehci->reset_done[wIndex]) { 1019 1020 /* Remote Wakeup received? */ 1021 if (temp & PORT_RESUME) { 1022 /* resume signaling for 20 msec */ 1023 ehci->reset_done[wIndex] = jiffies 1024 + msecs_to_jiffies(20); 1025 usb_hcd_start_port_resume(&hcd->self, wIndex); 1026 set_bit(wIndex, &ehci->resuming_ports); 1027 /* check the port again */ 1028 mod_timer(&ehci_to_hcd(ehci)->rh_timer, 1029 ehci->reset_done[wIndex]); 1030 } 1031 1032 /* reset or resume not yet complete */ 1033 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { 1034 ; /* wait until it is complete */ 1035 1036 /* resume completed */ 1037 } else if (test_bit(wIndex, &ehci->resuming_ports)) { 1038 clear_bit(wIndex, &ehci->suspended_ports); 1039 set_bit(wIndex, &ehci->port_c_suspend); 1040 ehci->reset_done[wIndex] = 0; 1041 usb_hcd_end_port_resume(&hcd->self, wIndex); 1042 1043 /* stop resume signaling */ 1044 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); 1045 ehci_writel(ehci, temp, status_reg); 1046 clear_bit(wIndex, &ehci->resuming_ports); 1047 retval = ehci_handshake(ehci, status_reg, 1048 PORT_RESUME, 0, 2000 /* 2msec */); 1049 if (retval != 0) { 1050 ehci_err(ehci, "port %d resume error %d\n", 1051 wIndex + 1, retval); 1052 goto error; 1053 } 1054 temp = ehci_readl(ehci, status_reg); 1055 1056 /* whoever resets must GetPortStatus to complete it!! */ 1057 } else { 1058 status |= USB_PORT_STAT_C_RESET << 16; 1059 ehci->reset_done [wIndex] = 0; 1060 1061 /* force reset to complete */ 1062 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), 1063 status_reg); 1064 /* REVISIT: some hardware needs 550+ usec to clear 1065 * this bit; seems too long to spin routinely... 1066 */ 1067 retval = ehci_handshake(ehci, status_reg, 1068 PORT_RESET, 0, 1000); 1069 if (retval != 0) { 1070 ehci_err (ehci, "port %d reset error %d\n", 1071 wIndex + 1, retval); 1072 goto error; 1073 } 1074 1075 /* see what we found out */ 1076 temp = check_reset_complete (ehci, wIndex, status_reg, 1077 ehci_readl(ehci, status_reg)); 1078 } 1079 1080 /* transfer dedicated ports to the companion hc */ 1081 if ((temp & PORT_CONNECT) && 1082 test_bit(wIndex, &ehci->companion_ports)) { 1083 temp &= ~PORT_RWC_BITS; 1084 temp |= PORT_OWNER; 1085 ehci_writel(ehci, temp, status_reg); 1086 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); 1087 temp = ehci_readl(ehci, status_reg); 1088 } 1089 1090 /* 1091 * Even if OWNER is set, there's no harm letting hub_wq 1092 * see the wPortStatus values (they should all be 0 except 1093 * for PORT_POWER anyway). 1094 */ 1095 1096 if (temp & PORT_CONNECT) { 1097 status |= USB_PORT_STAT_CONNECTION; 1098 // status may be from integrated TT 1099 if (ehci->has_hostpc) { 1100 temp1 = ehci_readl(ehci, hostpc_reg); 1101 status |= ehci_port_speed(ehci, temp1); 1102 } else 1103 status |= ehci_port_speed(ehci, temp); 1104 } 1105 if (temp & PORT_PE) 1106 status |= USB_PORT_STAT_ENABLE; 1107 1108 /* maybe the port was unsuspended without our knowledge */ 1109 if (temp & (PORT_SUSPEND|PORT_RESUME)) { 1110 status |= USB_PORT_STAT_SUSPEND; 1111 } else if (test_bit(wIndex, &ehci->suspended_ports)) { 1112 clear_bit(wIndex, &ehci->suspended_ports); 1113 clear_bit(wIndex, &ehci->resuming_ports); 1114 ehci->reset_done[wIndex] = 0; 1115 if (temp & PORT_PE) 1116 set_bit(wIndex, &ehci->port_c_suspend); 1117 usb_hcd_end_port_resume(&hcd->self, wIndex); 1118 } 1119 1120 if (temp & PORT_OC) 1121 status |= USB_PORT_STAT_OVERCURRENT; 1122 if (temp & PORT_RESET) 1123 status |= USB_PORT_STAT_RESET; 1124 if (temp & PORT_POWER) 1125 status |= USB_PORT_STAT_POWER; 1126 if (test_bit(wIndex, &ehci->port_c_suspend)) 1127 status |= USB_PORT_STAT_C_SUSPEND << 16; 1128 1129 if (status & ~0xffff) /* only if wPortChange is interesting */ 1130 dbg_port(ehci, "GetStatus", wIndex + 1, temp); 1131 put_unaligned_le32(status, buf); 1132 break; 1133 case SetHubFeature: 1134 switch (wValue) { 1135 case C_HUB_LOCAL_POWER: 1136 case C_HUB_OVER_CURRENT: 1137 /* no hub-wide feature/status flags */ 1138 break; 1139 default: 1140 goto error; 1141 } 1142 break; 1143 case SetPortFeature: 1144 selector = wIndex >> 8; 1145 wIndex &= 0xff; 1146 if (unlikely(ehci->debug)) { 1147 /* If the debug port is active any port 1148 * feature requests should get denied */ 1149 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && 1150 (readl(&ehci->debug->control) & DBGP_ENABLED)) { 1151 retval = -ENODEV; 1152 goto error_exit; 1153 } 1154 } 1155 if (!wIndex || wIndex > ports) 1156 goto error; 1157 wIndex--; 1158 temp = ehci_readl(ehci, status_reg); 1159 if (temp & PORT_OWNER) 1160 break; 1161 1162 temp &= ~PORT_RWC_BITS; 1163 switch (wValue) { 1164 case USB_PORT_FEAT_SUSPEND: 1165 if (ehci->no_selective_suspend) 1166 break; 1167 if ((temp & PORT_PE) == 0 1168 || (temp & PORT_RESET) != 0) 1169 goto error; 1170 1171 /* After above check the port must be connected. 1172 * Set appropriate bit thus could put phy into low power 1173 * mode if we have tdi_phy_lpm feature 1174 */ 1175 temp &= ~PORT_WKCONN_E; 1176 temp |= PORT_WKDISC_E | PORT_WKOC_E; 1177 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); 1178 if (ehci->has_tdi_phy_lpm) { 1179 spin_unlock_irqrestore(&ehci->lock, flags); 1180 msleep(5);/* 5ms for HCD enter low pwr mode */ 1181 spin_lock_irqsave(&ehci->lock, flags); 1182 temp1 = ehci_readl(ehci, hostpc_reg); 1183 ehci_writel(ehci, temp1 | HOSTPC_PHCD, 1184 hostpc_reg); 1185 temp1 = ehci_readl(ehci, hostpc_reg); 1186 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", 1187 wIndex, (temp1 & HOSTPC_PHCD) ? 1188 "succeeded" : "failed"); 1189 } 1190 set_bit(wIndex, &ehci->suspended_ports); 1191 break; 1192 case USB_PORT_FEAT_POWER: 1193 if (HCS_PPC(ehci->hcs_params)) { 1194 spin_unlock_irqrestore(&ehci->lock, flags); 1195 ehci_port_power(ehci, wIndex, true); 1196 spin_lock_irqsave(&ehci->lock, flags); 1197 } 1198 break; 1199 case USB_PORT_FEAT_RESET: 1200 if (temp & (PORT_SUSPEND|PORT_RESUME)) 1201 goto error; 1202 /* line status bits may report this as low speed, 1203 * which can be fine if this root hub has a 1204 * transaction translator built in. 1205 */ 1206 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT 1207 && !ehci_is_TDI(ehci) 1208 && PORT_USB11 (temp)) { 1209 ehci_dbg (ehci, 1210 "port %d low speed --> companion\n", 1211 wIndex + 1); 1212 temp |= PORT_OWNER; 1213 } else { 1214 temp |= PORT_RESET; 1215 temp &= ~PORT_PE; 1216 1217 /* 1218 * caller must wait, then call GetPortStatus 1219 * usb 2.0 spec says 50 ms resets on root 1220 */ 1221 ehci->reset_done [wIndex] = jiffies 1222 + msecs_to_jiffies (50); 1223 } 1224 ehci_writel(ehci, temp, status_reg); 1225 break; 1226 1227 /* For downstream facing ports (these): one hub port is put 1228 * into test mode according to USB2 11.24.2.13, then the hub 1229 * must be reset (which for root hub now means rmmod+modprobe, 1230 * or else system reboot). See EHCI 2.3.9 and 4.14 for info 1231 * about the EHCI-specific stuff. 1232 */ 1233 case USB_PORT_FEAT_TEST: 1234 #ifdef CONFIG_USB_HCD_TEST_MODE 1235 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { 1236 spin_unlock_irqrestore(&ehci->lock, flags); 1237 retval = ehset_single_step_set_feature(hcd, 1238 wIndex + 1); 1239 spin_lock_irqsave(&ehci->lock, flags); 1240 break; 1241 } 1242 #endif 1243 if (!selector || selector > 5) 1244 goto error; 1245 spin_unlock_irqrestore(&ehci->lock, flags); 1246 ehci_quiesce(ehci); 1247 spin_lock_irqsave(&ehci->lock, flags); 1248 1249 /* Put all enabled ports into suspend */ 1250 while (ports--) { 1251 u32 __iomem *sreg = 1252 &ehci->regs->port_status[ports]; 1253 1254 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; 1255 if (temp & PORT_PE) 1256 ehci_writel(ehci, temp | PORT_SUSPEND, 1257 sreg); 1258 } 1259 1260 spin_unlock_irqrestore(&ehci->lock, flags); 1261 ehci_halt(ehci); 1262 spin_lock_irqsave(&ehci->lock, flags); 1263 1264 temp = ehci_readl(ehci, status_reg); 1265 temp |= selector << 16; 1266 ehci_writel(ehci, temp, status_reg); 1267 break; 1268 1269 default: 1270 goto error; 1271 } 1272 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ 1273 break; 1274 1275 default: 1276 error: 1277 /* "stall" on error */ 1278 retval = -EPIPE; 1279 } 1280 error_exit: 1281 spin_unlock_irqrestore (&ehci->lock, flags); 1282 return retval; 1283 } 1284 EXPORT_SYMBOL_GPL(ehci_hub_control); 1285 1286 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) 1287 { 1288 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 1289 1290 if (ehci_is_TDI(ehci)) 1291 return; 1292 set_owner(ehci, --portnum, PORT_OWNER); 1293 } 1294 1295 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) 1296 { 1297 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 1298 u32 __iomem *reg; 1299 1300 if (ehci_is_TDI(ehci)) 1301 return 0; 1302 reg = &ehci->regs->port_status[portnum - 1]; 1303 return ehci_readl(ehci, reg) & PORT_OWNER; 1304 } 1305 1306 static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) 1307 { 1308 struct usb_hcd *hcd = ehci_to_hcd(ehci); 1309 u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; 1310 u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; 1311 1312 if (enable) 1313 ehci_writel(ehci, temp | PORT_POWER, status_reg); 1314 else 1315 ehci_writel(ehci, temp & ~PORT_POWER, status_reg); 1316 1317 if (hcd->driver->port_power) 1318 hcd->driver->port_power(hcd, portnum, enable); 1319 1320 return 0; 1321 } 1322