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 int ehci_hub_control( 36 struct usb_hcd *hcd, 37 u16 typeReq, 38 u16 wValue, 39 u16 wIndex, 40 char *buf, 41 u16 wLength 42 ); 43 44 /* After a power loss, ports that were owned by the companion must be 45 * reset so that the companion can still own them. 46 */ 47 static void ehci_handover_companion_ports(struct ehci_hcd *ehci) 48 { 49 u32 __iomem *reg; 50 u32 status; 51 int port; 52 __le32 buf; 53 struct usb_hcd *hcd = ehci_to_hcd(ehci); 54 55 if (!ehci->owned_ports) 56 return; 57 58 /* Give the connections some time to appear */ 59 msleep(20); 60 61 port = HCS_N_PORTS(ehci->hcs_params); 62 while (port--) { 63 if (test_bit(port, &ehci->owned_ports)) { 64 reg = &ehci->regs->port_status[port]; 65 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 66 67 /* Port already owned by companion? */ 68 if (status & PORT_OWNER) 69 clear_bit(port, &ehci->owned_ports); 70 else if (test_bit(port, &ehci->companion_ports)) 71 ehci_writel(ehci, status & ~PORT_PE, reg); 72 else 73 ehci_hub_control(hcd, SetPortFeature, 74 USB_PORT_FEAT_RESET, port + 1, 75 NULL, 0); 76 } 77 } 78 79 if (!ehci->owned_ports) 80 return; 81 msleep(90); /* Wait for resets to complete */ 82 83 port = HCS_N_PORTS(ehci->hcs_params); 84 while (port--) { 85 if (test_bit(port, &ehci->owned_ports)) { 86 ehci_hub_control(hcd, GetPortStatus, 87 0, port + 1, 88 (char *) &buf, sizeof(buf)); 89 90 /* The companion should now own the port, 91 * but if something went wrong the port must not 92 * remain enabled. 93 */ 94 reg = &ehci->regs->port_status[port]; 95 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 96 if (status & PORT_OWNER) 97 ehci_writel(ehci, status | PORT_CSC, reg); 98 else { 99 ehci_dbg(ehci, "failed handover port %d: %x\n", 100 port + 1, status); 101 ehci_writel(ehci, status & ~PORT_PE, reg); 102 } 103 } 104 } 105 106 ehci->owned_ports = 0; 107 } 108 109 static int ehci_bus_suspend (struct usb_hcd *hcd) 110 { 111 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 112 int port; 113 int mask; 114 u32 __iomem *hostpc_reg = NULL; 115 116 ehci_dbg(ehci, "suspend root hub\n"); 117 118 if (time_before (jiffies, ehci->next_statechange)) 119 msleep(5); 120 del_timer_sync(&ehci->watchdog); 121 del_timer_sync(&ehci->iaa_watchdog); 122 123 port = HCS_N_PORTS (ehci->hcs_params); 124 spin_lock_irq (&ehci->lock); 125 126 /* stop schedules, clean any completed work */ 127 if (HC_IS_RUNNING(hcd->state)) { 128 ehci_quiesce (ehci); 129 hcd->state = HC_STATE_QUIESCING; 130 } 131 ehci->command = ehci_readl(ehci, &ehci->regs->command); 132 ehci_work(ehci); 133 134 /* Unlike other USB host controller types, EHCI doesn't have 135 * any notion of "global" or bus-wide suspend. The driver has 136 * to manually suspend all the active unsuspended ports, and 137 * then manually resume them in the bus_resume() routine. 138 */ 139 ehci->bus_suspended = 0; 140 ehci->owned_ports = 0; 141 while (port--) { 142 u32 __iomem *reg = &ehci->regs->port_status [port]; 143 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 144 u32 t2 = t1; 145 146 if (ehci->has_hostpc) 147 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs 148 + HOSTPC0 + 4 * (port & 0xff)); 149 /* keep track of which ports we suspend */ 150 if (t1 & PORT_OWNER) 151 set_bit(port, &ehci->owned_ports); 152 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { 153 t2 |= PORT_SUSPEND; 154 set_bit(port, &ehci->bus_suspended); 155 } 156 157 /* enable remote wakeup on all ports */ 158 if (hcd->self.root_hub->do_remote_wakeup) { 159 /* only enable appropriate wake bits, otherwise the 160 * hardware can not go phy low power mode. If a race 161 * condition happens here(connection change during bits 162 * set), the port change detection will finally fix it. 163 */ 164 if (t1 & PORT_CONNECT) { 165 t2 |= PORT_WKOC_E | PORT_WKDISC_E; 166 t2 &= ~PORT_WKCONN_E; 167 } else { 168 t2 |= PORT_WKOC_E | PORT_WKCONN_E; 169 t2 &= ~PORT_WKDISC_E; 170 } 171 } else 172 t2 &= ~PORT_WAKE_BITS; 173 174 if (t1 != t2) { 175 ehci_vdbg (ehci, "port %d, %08x -> %08x\n", 176 port + 1, t1, t2); 177 ehci_writel(ehci, t2, reg); 178 if (hostpc_reg) { 179 u32 t3; 180 181 msleep(5);/* 5ms for HCD enter low pwr mode */ 182 t3 = ehci_readl(ehci, hostpc_reg); 183 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); 184 t3 = ehci_readl(ehci, hostpc_reg); 185 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", 186 port, (t3 & HOSTPC_PHCD) ? 187 "succeeded" : "failed"); 188 } 189 } 190 } 191 192 /* Apparently some devices need a >= 1-uframe delay here */ 193 if (ehci->bus_suspended) 194 udelay(150); 195 196 /* turn off now-idle HC */ 197 ehci_halt (ehci); 198 hcd->state = HC_STATE_SUSPENDED; 199 200 if (ehci->reclaim) 201 end_unlink_async(ehci); 202 203 /* allow remote wakeup */ 204 mask = INTR_MASK; 205 if (!hcd->self.root_hub->do_remote_wakeup) 206 mask &= ~STS_PCD; 207 ehci_writel(ehci, mask, &ehci->regs->intr_enable); 208 ehci_readl(ehci, &ehci->regs->intr_enable); 209 210 ehci->next_statechange = jiffies + msecs_to_jiffies(10); 211 spin_unlock_irq (&ehci->lock); 212 213 /* ehci_work() may have re-enabled the watchdog timer, which we do not 214 * want, and so we must delete any pending watchdog timer events. 215 */ 216 del_timer_sync(&ehci->watchdog); 217 return 0; 218 } 219 220 221 /* caller has locked the root hub, and should reset/reinit on error */ 222 static int ehci_bus_resume (struct usb_hcd *hcd) 223 { 224 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 225 u32 temp; 226 u32 power_okay; 227 int i; 228 u8 resume_needed = 0; 229 230 if (time_before (jiffies, ehci->next_statechange)) 231 msleep(5); 232 spin_lock_irq (&ehci->lock); 233 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { 234 spin_unlock_irq(&ehci->lock); 235 return -ESHUTDOWN; 236 } 237 238 if (unlikely(ehci->debug)) { 239 if (!dbgp_reset_prep()) 240 ehci->debug = NULL; 241 else 242 dbgp_external_startup(); 243 } 244 245 /* Ideally and we've got a real resume here, and no port's power 246 * was lost. (For PCI, that means Vaux was maintained.) But we 247 * could instead be restoring a swsusp snapshot -- so that BIOS was 248 * the last user of the controller, not reset/pm hardware keeping 249 * state we gave to it. 250 */ 251 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); 252 ehci_dbg(ehci, "resume root hub%s\n", 253 power_okay ? "" : " after power loss"); 254 255 /* at least some APM implementations will try to deliver 256 * IRQs right away, so delay them until we're ready. 257 */ 258 ehci_writel(ehci, 0, &ehci->regs->intr_enable); 259 260 /* re-init operational registers */ 261 ehci_writel(ehci, 0, &ehci->regs->segment); 262 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); 263 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); 264 265 /* restore CMD_RUN, framelist size, and irq threshold */ 266 ehci_writel(ehci, ehci->command, &ehci->regs->command); 267 268 /* Some controller/firmware combinations need a delay during which 269 * they set up the port statuses. See Bugzilla #8190. */ 270 spin_unlock_irq(&ehci->lock); 271 msleep(8); 272 spin_lock_irq(&ehci->lock); 273 274 /* manually resume the ports we suspended during bus_suspend() */ 275 i = HCS_N_PORTS (ehci->hcs_params); 276 while (i--) { 277 temp = ehci_readl(ehci, &ehci->regs->port_status [i]); 278 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); 279 if (test_bit(i, &ehci->bus_suspended) && 280 (temp & PORT_SUSPEND)) { 281 temp |= PORT_RESUME; 282 resume_needed = 1; 283 } 284 ehci_writel(ehci, temp, &ehci->regs->port_status [i]); 285 } 286 287 /* msleep for 20ms only if code is trying to resume port */ 288 if (resume_needed) { 289 spin_unlock_irq(&ehci->lock); 290 msleep(20); 291 spin_lock_irq(&ehci->lock); 292 } 293 294 i = HCS_N_PORTS (ehci->hcs_params); 295 while (i--) { 296 temp = ehci_readl(ehci, &ehci->regs->port_status [i]); 297 if (test_bit(i, &ehci->bus_suspended) && 298 (temp & PORT_SUSPEND)) { 299 temp &= ~(PORT_RWC_BITS | PORT_RESUME); 300 ehci_writel(ehci, temp, &ehci->regs->port_status [i]); 301 ehci_vdbg (ehci, "resumed port %d\n", i + 1); 302 } 303 } 304 (void) ehci_readl(ehci, &ehci->regs->command); 305 306 /* maybe re-activate the schedule(s) */ 307 temp = 0; 308 if (ehci->async->qh_next.qh) 309 temp |= CMD_ASE; 310 if (ehci->periodic_sched) 311 temp |= CMD_PSE; 312 if (temp) { 313 ehci->command |= temp; 314 ehci_writel(ehci, ehci->command, &ehci->regs->command); 315 } 316 317 ehci->next_statechange = jiffies + msecs_to_jiffies(5); 318 hcd->state = HC_STATE_RUNNING; 319 320 /* Now we can safely re-enable irqs */ 321 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); 322 323 spin_unlock_irq (&ehci->lock); 324 ehci_handover_companion_ports(ehci); 325 return 0; 326 } 327 328 #else 329 330 #define ehci_bus_suspend NULL 331 #define ehci_bus_resume NULL 332 333 #endif /* CONFIG_PM */ 334 335 /*-------------------------------------------------------------------------*/ 336 337 /* Display the ports dedicated to the companion controller */ 338 static ssize_t show_companion(struct device *dev, 339 struct device_attribute *attr, 340 char *buf) 341 { 342 struct ehci_hcd *ehci; 343 int nports, index, n; 344 int count = PAGE_SIZE; 345 char *ptr = buf; 346 347 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); 348 nports = HCS_N_PORTS(ehci->hcs_params); 349 350 for (index = 0; index < nports; ++index) { 351 if (test_bit(index, &ehci->companion_ports)) { 352 n = scnprintf(ptr, count, "%d\n", index + 1); 353 ptr += n; 354 count -= n; 355 } 356 } 357 return ptr - buf; 358 } 359 360 /* 361 * Sets the owner of a port 362 */ 363 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) 364 { 365 u32 __iomem *status_reg; 366 u32 port_status; 367 int try; 368 369 status_reg = &ehci->regs->port_status[portnum]; 370 371 /* 372 * The controller won't set the OWNER bit if the port is 373 * enabled, so this loop will sometimes require at least two 374 * iterations: one to disable the port and one to set OWNER. 375 */ 376 for (try = 4; try > 0; --try) { 377 spin_lock_irq(&ehci->lock); 378 port_status = ehci_readl(ehci, status_reg); 379 if ((port_status & PORT_OWNER) == new_owner 380 || (port_status & (PORT_OWNER | PORT_CONNECT)) 381 == 0) 382 try = 0; 383 else { 384 port_status ^= PORT_OWNER; 385 port_status &= ~(PORT_PE | PORT_RWC_BITS); 386 ehci_writel(ehci, port_status, status_reg); 387 } 388 spin_unlock_irq(&ehci->lock); 389 if (try > 1) 390 msleep(5); 391 } 392 } 393 394 /* 395 * Dedicate or undedicate a port to the companion controller. 396 * Syntax is "[-]portnum", where a leading '-' sign means 397 * return control of the port to the EHCI controller. 398 */ 399 static ssize_t store_companion(struct device *dev, 400 struct device_attribute *attr, 401 const char *buf, size_t count) 402 { 403 struct ehci_hcd *ehci; 404 int portnum, new_owner; 405 406 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); 407 new_owner = PORT_OWNER; /* Owned by companion */ 408 if (sscanf(buf, "%d", &portnum) != 1) 409 return -EINVAL; 410 if (portnum < 0) { 411 portnum = - portnum; 412 new_owner = 0; /* Owned by EHCI */ 413 } 414 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) 415 return -ENOENT; 416 portnum--; 417 if (new_owner) 418 set_bit(portnum, &ehci->companion_ports); 419 else 420 clear_bit(portnum, &ehci->companion_ports); 421 set_owner(ehci, portnum, new_owner); 422 return count; 423 } 424 static DEVICE_ATTR(companion, 0644, show_companion, store_companion); 425 426 static inline void create_companion_file(struct ehci_hcd *ehci) 427 { 428 int i; 429 430 /* with integrated TT there is no companion! */ 431 if (!ehci_is_TDI(ehci)) 432 i = device_create_file(ehci_to_hcd(ehci)->self.controller, 433 &dev_attr_companion); 434 } 435 436 static inline void remove_companion_file(struct ehci_hcd *ehci) 437 { 438 /* with integrated TT there is no companion! */ 439 if (!ehci_is_TDI(ehci)) 440 device_remove_file(ehci_to_hcd(ehci)->self.controller, 441 &dev_attr_companion); 442 } 443 444 445 /*-------------------------------------------------------------------------*/ 446 447 static int check_reset_complete ( 448 struct ehci_hcd *ehci, 449 int index, 450 u32 __iomem *status_reg, 451 int port_status 452 ) { 453 if (!(port_status & PORT_CONNECT)) 454 return port_status; 455 456 /* if reset finished and it's still not enabled -- handoff */ 457 if (!(port_status & PORT_PE)) { 458 459 /* with integrated TT, there's nobody to hand it to! */ 460 if (ehci_is_TDI(ehci)) { 461 ehci_dbg (ehci, 462 "Failed to enable port %d on root hub TT\n", 463 index+1); 464 return port_status; 465 } 466 467 ehci_dbg (ehci, "port %d full speed --> companion\n", 468 index + 1); 469 470 // what happens if HCS_N_CC(params) == 0 ? 471 port_status |= PORT_OWNER; 472 port_status &= ~PORT_RWC_BITS; 473 ehci_writel(ehci, port_status, status_reg); 474 475 /* ensure 440EPX ohci controller state is operational */ 476 if (ehci->has_amcc_usb23) 477 set_ohci_hcfs(ehci, 1); 478 } else { 479 ehci_dbg (ehci, "port %d high speed\n", index + 1); 480 /* ensure 440EPx ohci controller state is suspended */ 481 if (ehci->has_amcc_usb23) 482 set_ohci_hcfs(ehci, 0); 483 } 484 485 return port_status; 486 } 487 488 /*-------------------------------------------------------------------------*/ 489 490 491 /* build "status change" packet (one or two bytes) from HC registers */ 492 493 static int 494 ehci_hub_status_data (struct usb_hcd *hcd, char *buf) 495 { 496 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 497 u32 temp, status = 0; 498 u32 mask; 499 int ports, i, retval = 1; 500 unsigned long flags; 501 502 /* if !USB_SUSPEND, root hub timers won't get shut down ... */ 503 if (!HC_IS_RUNNING(hcd->state)) 504 return 0; 505 506 /* init status to no-changes */ 507 buf [0] = 0; 508 ports = HCS_N_PORTS (ehci->hcs_params); 509 if (ports > 7) { 510 buf [1] = 0; 511 retval++; 512 } 513 514 /* Some boards (mostly VIA?) report bogus overcurrent indications, 515 * causing massive log spam unless we completely ignore them. It 516 * may be relevant that VIA VT8235 controllers, where PORT_POWER is 517 * always set, seem to clear PORT_OCC and PORT_CSC when writing to 518 * PORT_POWER; that's surprising, but maybe within-spec. 519 */ 520 if (!ignore_oc) 521 mask = PORT_CSC | PORT_PEC | PORT_OCC; 522 else 523 mask = PORT_CSC | PORT_PEC; 524 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND 525 526 /* no hub change reports (bit 0) for now (power, ...) */ 527 528 /* port N changes (bit N)? */ 529 spin_lock_irqsave (&ehci->lock, flags); 530 for (i = 0; i < ports; i++) { 531 temp = ehci_readl(ehci, &ehci->regs->port_status [i]); 532 533 /* 534 * Return status information even for ports with OWNER set. 535 * Otherwise khubd wouldn't see the disconnect event when a 536 * high-speed device is switched over to the companion 537 * controller by the user. 538 */ 539 540 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) 541 || (ehci->reset_done[i] && time_after_eq( 542 jiffies, ehci->reset_done[i]))) { 543 if (i < 7) 544 buf [0] |= 1 << (i + 1); 545 else 546 buf [1] |= 1 << (i - 7); 547 status = STS_PCD; 548 } 549 } 550 /* FIXME autosuspend idle root hubs */ 551 spin_unlock_irqrestore (&ehci->lock, flags); 552 return status ? retval : 0; 553 } 554 555 /*-------------------------------------------------------------------------*/ 556 557 static void 558 ehci_hub_descriptor ( 559 struct ehci_hcd *ehci, 560 struct usb_hub_descriptor *desc 561 ) { 562 int ports = HCS_N_PORTS (ehci->hcs_params); 563 u16 temp; 564 565 desc->bDescriptorType = 0x29; 566 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ 567 desc->bHubContrCurrent = 0; 568 569 desc->bNbrPorts = ports; 570 temp = 1 + (ports / 8); 571 desc->bDescLength = 7 + 2 * temp; 572 573 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ 574 memset (&desc->bitmap [0], 0, temp); 575 memset (&desc->bitmap [temp], 0xff, temp); 576 577 temp = 0x0008; /* per-port overcurrent reporting */ 578 if (HCS_PPC (ehci->hcs_params)) 579 temp |= 0x0001; /* per-port power control */ 580 else 581 temp |= 0x0002; /* no power switching */ 582 #if 0 583 // re-enable when we support USB_PORT_FEAT_INDICATOR below. 584 if (HCS_INDICATOR (ehci->hcs_params)) 585 temp |= 0x0080; /* per-port indicators (LEDs) */ 586 #endif 587 desc->wHubCharacteristics = cpu_to_le16(temp); 588 } 589 590 /*-------------------------------------------------------------------------*/ 591 592 static int ehci_hub_control ( 593 struct usb_hcd *hcd, 594 u16 typeReq, 595 u16 wValue, 596 u16 wIndex, 597 char *buf, 598 u16 wLength 599 ) { 600 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 601 int ports = HCS_N_PORTS (ehci->hcs_params); 602 u32 __iomem *status_reg = &ehci->regs->port_status[ 603 (wIndex & 0xff) - 1]; 604 u32 __iomem *hostpc_reg = NULL; 605 u32 temp, temp1, status; 606 unsigned long flags; 607 int retval = 0; 608 unsigned selector; 609 610 /* 611 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. 612 * HCS_INDICATOR may say we can change LEDs to off/amber/green. 613 * (track current state ourselves) ... blink for diagnostics, 614 * power, "this is the one", etc. EHCI spec supports this. 615 */ 616 617 if (ehci->has_hostpc) 618 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs 619 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1)); 620 spin_lock_irqsave (&ehci->lock, flags); 621 switch (typeReq) { 622 case ClearHubFeature: 623 switch (wValue) { 624 case C_HUB_LOCAL_POWER: 625 case C_HUB_OVER_CURRENT: 626 /* no hub-wide feature/status flags */ 627 break; 628 default: 629 goto error; 630 } 631 break; 632 case ClearPortFeature: 633 if (!wIndex || wIndex > ports) 634 goto error; 635 wIndex--; 636 temp = ehci_readl(ehci, status_reg); 637 638 /* 639 * Even if OWNER is set, so the port is owned by the 640 * companion controller, khubd needs to be able to clear 641 * the port-change status bits (especially 642 * USB_PORT_FEAT_C_CONNECTION). 643 */ 644 645 switch (wValue) { 646 case USB_PORT_FEAT_ENABLE: 647 ehci_writel(ehci, temp & ~PORT_PE, status_reg); 648 break; 649 case USB_PORT_FEAT_C_ENABLE: 650 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, 651 status_reg); 652 break; 653 case USB_PORT_FEAT_SUSPEND: 654 if (temp & PORT_RESET) 655 goto error; 656 if (ehci->no_selective_suspend) 657 break; 658 if (temp & PORT_SUSPEND) { 659 if ((temp & PORT_PE) == 0) 660 goto error; 661 /* resume signaling for 20 msec */ 662 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); 663 ehci_writel(ehci, temp | PORT_RESUME, 664 status_reg); 665 ehci->reset_done [wIndex] = jiffies 666 + msecs_to_jiffies (20); 667 } 668 break; 669 case USB_PORT_FEAT_C_SUSPEND: 670 clear_bit(wIndex, &ehci->port_c_suspend); 671 break; 672 case USB_PORT_FEAT_POWER: 673 if (HCS_PPC (ehci->hcs_params)) 674 ehci_writel(ehci, 675 temp & ~(PORT_RWC_BITS | PORT_POWER), 676 status_reg); 677 break; 678 case USB_PORT_FEAT_C_CONNECTION: 679 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, 680 status_reg); 681 break; 682 case USB_PORT_FEAT_C_OVER_CURRENT: 683 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, 684 status_reg); 685 break; 686 case USB_PORT_FEAT_C_RESET: 687 /* GetPortStatus clears reset */ 688 break; 689 default: 690 goto error; 691 } 692 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ 693 break; 694 case GetHubDescriptor: 695 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) 696 buf); 697 break; 698 case GetHubStatus: 699 /* no hub-wide feature/status flags */ 700 memset (buf, 0, 4); 701 //cpu_to_le32s ((u32 *) buf); 702 break; 703 case GetPortStatus: 704 if (!wIndex || wIndex > ports) 705 goto error; 706 wIndex--; 707 status = 0; 708 temp = ehci_readl(ehci, status_reg); 709 710 // wPortChange bits 711 if (temp & PORT_CSC) 712 status |= 1 << USB_PORT_FEAT_C_CONNECTION; 713 if (temp & PORT_PEC) 714 status |= 1 << USB_PORT_FEAT_C_ENABLE; 715 716 if ((temp & PORT_OCC) && !ignore_oc){ 717 status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; 718 719 /* 720 * Hubs should disable port power on over-current. 721 * However, not all EHCI implementations do this 722 * automatically, even if they _do_ support per-port 723 * power switching; they're allowed to just limit the 724 * current. khubd will turn the power back on. 725 */ 726 if (HCS_PPC (ehci->hcs_params)){ 727 ehci_writel(ehci, 728 temp & ~(PORT_RWC_BITS | PORT_POWER), 729 status_reg); 730 } 731 } 732 733 /* whoever resumes must GetPortStatus to complete it!! */ 734 if (temp & PORT_RESUME) { 735 736 /* Remote Wakeup received? */ 737 if (!ehci->reset_done[wIndex]) { 738 /* resume signaling for 20 msec */ 739 ehci->reset_done[wIndex] = jiffies 740 + msecs_to_jiffies(20); 741 /* check the port again */ 742 mod_timer(&ehci_to_hcd(ehci)->rh_timer, 743 ehci->reset_done[wIndex]); 744 } 745 746 /* resume completed? */ 747 else if (time_after_eq(jiffies, 748 ehci->reset_done[wIndex])) { 749 clear_bit(wIndex, &ehci->suspended_ports); 750 set_bit(wIndex, &ehci->port_c_suspend); 751 ehci->reset_done[wIndex] = 0; 752 753 /* stop resume signaling */ 754 temp = ehci_readl(ehci, status_reg); 755 ehci_writel(ehci, 756 temp & ~(PORT_RWC_BITS | PORT_RESUME), 757 status_reg); 758 retval = handshake(ehci, status_reg, 759 PORT_RESUME, 0, 2000 /* 2msec */); 760 if (retval != 0) { 761 ehci_err(ehci, 762 "port %d resume error %d\n", 763 wIndex + 1, retval); 764 goto error; 765 } 766 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); 767 } 768 } 769 770 /* whoever resets must GetPortStatus to complete it!! */ 771 if ((temp & PORT_RESET) 772 && time_after_eq(jiffies, 773 ehci->reset_done[wIndex])) { 774 status |= 1 << USB_PORT_FEAT_C_RESET; 775 ehci->reset_done [wIndex] = 0; 776 777 /* force reset to complete */ 778 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), 779 status_reg); 780 /* REVISIT: some hardware needs 550+ usec to clear 781 * this bit; seems too long to spin routinely... 782 */ 783 retval = handshake(ehci, status_reg, 784 PORT_RESET, 0, 750); 785 if (retval != 0) { 786 ehci_err (ehci, "port %d reset error %d\n", 787 wIndex + 1, retval); 788 goto error; 789 } 790 791 /* see what we found out */ 792 temp = check_reset_complete (ehci, wIndex, status_reg, 793 ehci_readl(ehci, status_reg)); 794 } 795 796 if (!(temp & (PORT_RESUME|PORT_RESET))) 797 ehci->reset_done[wIndex] = 0; 798 799 /* transfer dedicated ports to the companion hc */ 800 if ((temp & PORT_CONNECT) && 801 test_bit(wIndex, &ehci->companion_ports)) { 802 temp &= ~PORT_RWC_BITS; 803 temp |= PORT_OWNER; 804 ehci_writel(ehci, temp, status_reg); 805 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); 806 temp = ehci_readl(ehci, status_reg); 807 } 808 809 /* 810 * Even if OWNER is set, there's no harm letting khubd 811 * see the wPortStatus values (they should all be 0 except 812 * for PORT_POWER anyway). 813 */ 814 815 if (temp & PORT_CONNECT) { 816 status |= 1 << USB_PORT_FEAT_CONNECTION; 817 // status may be from integrated TT 818 if (ehci->has_hostpc) { 819 temp1 = ehci_readl(ehci, hostpc_reg); 820 status |= ehci_port_speed(ehci, temp1); 821 } else 822 status |= ehci_port_speed(ehci, temp); 823 } 824 if (temp & PORT_PE) 825 status |= 1 << USB_PORT_FEAT_ENABLE; 826 827 /* maybe the port was unsuspended without our knowledge */ 828 if (temp & (PORT_SUSPEND|PORT_RESUME)) { 829 status |= 1 << USB_PORT_FEAT_SUSPEND; 830 } else if (test_bit(wIndex, &ehci->suspended_ports)) { 831 clear_bit(wIndex, &ehci->suspended_ports); 832 ehci->reset_done[wIndex] = 0; 833 if (temp & PORT_PE) 834 set_bit(wIndex, &ehci->port_c_suspend); 835 } 836 837 if (temp & PORT_OC) 838 status |= 1 << USB_PORT_FEAT_OVER_CURRENT; 839 if (temp & PORT_RESET) 840 status |= 1 << USB_PORT_FEAT_RESET; 841 if (temp & PORT_POWER) 842 status |= 1 << USB_PORT_FEAT_POWER; 843 if (test_bit(wIndex, &ehci->port_c_suspend)) 844 status |= 1 << USB_PORT_FEAT_C_SUSPEND; 845 846 #ifndef VERBOSE_DEBUG 847 if (status & ~0xffff) /* only if wPortChange is interesting */ 848 #endif 849 dbg_port (ehci, "GetStatus", wIndex + 1, temp); 850 put_unaligned_le32(status, buf); 851 break; 852 case SetHubFeature: 853 switch (wValue) { 854 case C_HUB_LOCAL_POWER: 855 case C_HUB_OVER_CURRENT: 856 /* no hub-wide feature/status flags */ 857 break; 858 default: 859 goto error; 860 } 861 break; 862 case SetPortFeature: 863 selector = wIndex >> 8; 864 wIndex &= 0xff; 865 if (unlikely(ehci->debug)) { 866 /* If the debug port is active any port 867 * feature requests should get denied */ 868 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && 869 (readl(&ehci->debug->control) & DBGP_ENABLED)) { 870 retval = -ENODEV; 871 goto error_exit; 872 } 873 } 874 if (!wIndex || wIndex > ports) 875 goto error; 876 wIndex--; 877 temp = ehci_readl(ehci, status_reg); 878 if (temp & PORT_OWNER) 879 break; 880 881 temp &= ~PORT_RWC_BITS; 882 switch (wValue) { 883 case USB_PORT_FEAT_SUSPEND: 884 if (ehci->no_selective_suspend) 885 break; 886 if ((temp & PORT_PE) == 0 887 || (temp & PORT_RESET) != 0) 888 goto error; 889 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); 890 /* After above check the port must be connected. 891 * Set appropriate bit thus could put phy into low power 892 * mode if we have hostpc feature 893 */ 894 if (hostpc_reg) { 895 temp &= ~PORT_WKCONN_E; 896 temp |= (PORT_WKDISC_E | PORT_WKOC_E); 897 ehci_writel(ehci, temp | PORT_SUSPEND, 898 status_reg); 899 msleep(5);/* 5ms for HCD enter low pwr mode */ 900 temp1 = ehci_readl(ehci, hostpc_reg); 901 ehci_writel(ehci, temp1 | HOSTPC_PHCD, 902 hostpc_reg); 903 temp1 = ehci_readl(ehci, hostpc_reg); 904 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", 905 wIndex, (temp1 & HOSTPC_PHCD) ? 906 "succeeded" : "failed"); 907 } 908 set_bit(wIndex, &ehci->suspended_ports); 909 break; 910 case USB_PORT_FEAT_POWER: 911 if (HCS_PPC (ehci->hcs_params)) 912 ehci_writel(ehci, temp | PORT_POWER, 913 status_reg); 914 break; 915 case USB_PORT_FEAT_RESET: 916 if (temp & PORT_RESUME) 917 goto error; 918 /* line status bits may report this as low speed, 919 * which can be fine if this root hub has a 920 * transaction translator built in. 921 */ 922 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT 923 && !ehci_is_TDI(ehci) 924 && PORT_USB11 (temp)) { 925 ehci_dbg (ehci, 926 "port %d low speed --> companion\n", 927 wIndex + 1); 928 temp |= PORT_OWNER; 929 } else { 930 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); 931 temp |= PORT_RESET; 932 temp &= ~PORT_PE; 933 934 /* 935 * caller must wait, then call GetPortStatus 936 * usb 2.0 spec says 50 ms resets on root 937 */ 938 ehci->reset_done [wIndex] = jiffies 939 + msecs_to_jiffies (50); 940 } 941 ehci_writel(ehci, temp, status_reg); 942 break; 943 944 /* For downstream facing ports (these): one hub port is put 945 * into test mode according to USB2 11.24.2.13, then the hub 946 * must be reset (which for root hub now means rmmod+modprobe, 947 * or else system reboot). See EHCI 2.3.9 and 4.14 for info 948 * about the EHCI-specific stuff. 949 */ 950 case USB_PORT_FEAT_TEST: 951 if (!selector || selector > 5) 952 goto error; 953 ehci_quiesce(ehci); 954 ehci_halt(ehci); 955 temp |= selector << 16; 956 ehci_writel(ehci, temp, status_reg); 957 break; 958 959 default: 960 goto error; 961 } 962 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ 963 break; 964 965 default: 966 error: 967 /* "stall" on error */ 968 retval = -EPIPE; 969 } 970 error_exit: 971 spin_unlock_irqrestore (&ehci->lock, flags); 972 return retval; 973 } 974 975 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) 976 { 977 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 978 979 if (ehci_is_TDI(ehci)) 980 return; 981 set_owner(ehci, --portnum, PORT_OWNER); 982 } 983 984 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) 985 { 986 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 987 u32 __iomem *reg; 988 989 if (ehci_is_TDI(ehci)) 990 return 0; 991 reg = &ehci->regs->port_status[portnum - 1]; 992 return ehci_readl(ehci, reg) & PORT_OWNER; 993 } 994