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 ehci_hub_control( 37 struct usb_hcd *hcd, 38 u16 typeReq, 39 u16 wValue, 40 u16 wIndex, 41 char *buf, 42 u16 wLength 43 ); 44 45 /* After a power loss, ports that were owned by the companion must be 46 * reset so that the companion can still own them. 47 */ 48 static void ehci_handover_companion_ports(struct ehci_hcd *ehci) 49 { 50 u32 __iomem *reg; 51 u32 status; 52 int port; 53 __le32 buf; 54 struct usb_hcd *hcd = ehci_to_hcd(ehci); 55 56 if (!ehci->owned_ports) 57 return; 58 59 /* Make sure the ports are powered */ 60 port = HCS_N_PORTS(ehci->hcs_params); 61 while (port--) { 62 if (test_bit(port, &ehci->owned_ports)) { 63 reg = &ehci->regs->port_status[port]; 64 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 65 if (!(status & PORT_POWER)) { 66 status |= PORT_POWER; 67 ehci_writel(ehci, status, reg); 68 } 69 } 70 } 71 72 /* Give the connections some time to appear */ 73 msleep(20); 74 75 spin_lock_irq(&ehci->lock); 76 port = HCS_N_PORTS(ehci->hcs_params); 77 while (port--) { 78 if (test_bit(port, &ehci->owned_ports)) { 79 reg = &ehci->regs->port_status[port]; 80 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 81 82 /* Port already owned by companion? */ 83 if (status & PORT_OWNER) 84 clear_bit(port, &ehci->owned_ports); 85 else if (test_bit(port, &ehci->companion_ports)) 86 ehci_writel(ehci, status & ~PORT_PE, reg); 87 else { 88 spin_unlock_irq(&ehci->lock); 89 ehci_hub_control(hcd, SetPortFeature, 90 USB_PORT_FEAT_RESET, port + 1, 91 NULL, 0); 92 spin_lock_irq(&ehci->lock); 93 } 94 } 95 } 96 spin_unlock_irq(&ehci->lock); 97 98 if (!ehci->owned_ports) 99 return; 100 msleep(90); /* Wait for resets to complete */ 101 102 spin_lock_irq(&ehci->lock); 103 port = HCS_N_PORTS(ehci->hcs_params); 104 while (port--) { 105 if (test_bit(port, &ehci->owned_ports)) { 106 spin_unlock_irq(&ehci->lock); 107 ehci_hub_control(hcd, GetPortStatus, 108 0, port + 1, 109 (char *) &buf, sizeof(buf)); 110 spin_lock_irq(&ehci->lock); 111 112 /* The companion should now own the port, 113 * but if something went wrong the port must not 114 * remain enabled. 115 */ 116 reg = &ehci->regs->port_status[port]; 117 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 118 if (status & PORT_OWNER) 119 ehci_writel(ehci, status | PORT_CSC, reg); 120 else { 121 ehci_dbg(ehci, "failed handover port %d: %x\n", 122 port + 1, status); 123 ehci_writel(ehci, status & ~PORT_PE, reg); 124 } 125 } 126 } 127 128 ehci->owned_ports = 0; 129 spin_unlock_irq(&ehci->lock); 130 } 131 132 static int ehci_port_change(struct ehci_hcd *ehci) 133 { 134 int i = HCS_N_PORTS(ehci->hcs_params); 135 136 /* First check if the controller indicates a change event */ 137 138 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) 139 return 1; 140 141 /* 142 * Not all controllers appear to update this while going from D3 to D0, 143 * so check the individual port status registers as well 144 */ 145 146 while (i--) 147 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) 148 return 1; 149 150 return 0; 151 } 152 153 static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, 154 bool suspending, bool do_wakeup) 155 { 156 int port; 157 u32 temp; 158 159 /* If remote wakeup is enabled for the root hub but disabled 160 * for the controller, we must adjust all the port wakeup flags 161 * when the controller is suspended or resumed. In all other 162 * cases they don't need to be changed. 163 */ 164 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) 165 return; 166 167 spin_lock_irq(&ehci->lock); 168 169 /* clear phy low-power mode before changing wakeup flags */ 170 if (ehci->has_hostpc) { 171 port = HCS_N_PORTS(ehci->hcs_params); 172 while (port--) { 173 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 174 175 temp = ehci_readl(ehci, hostpc_reg); 176 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); 177 } 178 spin_unlock_irq(&ehci->lock); 179 msleep(5); 180 spin_lock_irq(&ehci->lock); 181 } 182 183 port = HCS_N_PORTS(ehci->hcs_params); 184 while (port--) { 185 u32 __iomem *reg = &ehci->regs->port_status[port]; 186 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 187 u32 t2 = t1 & ~PORT_WAKE_BITS; 188 189 /* If we are suspending the controller, clear the flags. 190 * If we are resuming the controller, set the wakeup flags. 191 */ 192 if (!suspending) { 193 if (t1 & PORT_CONNECT) 194 t2 |= PORT_WKOC_E | PORT_WKDISC_E; 195 else 196 t2 |= PORT_WKOC_E | PORT_WKCONN_E; 197 } 198 ehci_vdbg(ehci, "port %d, %08x -> %08x\n", 199 port + 1, t1, t2); 200 ehci_writel(ehci, t2, reg); 201 } 202 203 /* enter phy low-power mode again */ 204 if (ehci->has_hostpc) { 205 port = HCS_N_PORTS(ehci->hcs_params); 206 while (port--) { 207 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 208 209 temp = ehci_readl(ehci, hostpc_reg); 210 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); 211 } 212 } 213 214 /* Does the root hub have a port wakeup pending? */ 215 if (!suspending && ehci_port_change(ehci)) 216 usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); 217 218 spin_unlock_irq(&ehci->lock); 219 } 220 221 static int ehci_bus_suspend (struct usb_hcd *hcd) 222 { 223 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 224 int port; 225 int mask; 226 int changed; 227 228 ehci_dbg(ehci, "suspend root hub\n"); 229 230 if (time_before (jiffies, ehci->next_statechange)) 231 msleep(5); 232 233 /* stop the schedules */ 234 ehci_quiesce(ehci); 235 236 spin_lock_irq (&ehci->lock); 237 if (ehci->rh_state < EHCI_RH_RUNNING) 238 goto done; 239 240 /* Once the controller is stopped, port resumes that are already 241 * in progress won't complete. Hence if remote wakeup is enabled 242 * for the root hub and any ports are in the middle of a resume or 243 * remote wakeup, we must fail the suspend. 244 */ 245 if (hcd->self.root_hub->do_remote_wakeup) { 246 if (ehci->resuming_ports) { 247 spin_unlock_irq(&ehci->lock); 248 ehci_dbg(ehci, "suspend failed because a port is resuming\n"); 249 return -EBUSY; 250 } 251 } 252 253 /* Unlike other USB host controller types, EHCI doesn't have 254 * any notion of "global" or bus-wide suspend. The driver has 255 * to manually suspend all the active unsuspended ports, and 256 * then manually resume them in the bus_resume() routine. 257 */ 258 ehci->bus_suspended = 0; 259 ehci->owned_ports = 0; 260 changed = 0; 261 port = HCS_N_PORTS(ehci->hcs_params); 262 while (port--) { 263 u32 __iomem *reg = &ehci->regs->port_status [port]; 264 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; 265 u32 t2 = t1 & ~PORT_WAKE_BITS; 266 267 /* keep track of which ports we suspend */ 268 if (t1 & PORT_OWNER) 269 set_bit(port, &ehci->owned_ports); 270 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { 271 t2 |= PORT_SUSPEND; 272 set_bit(port, &ehci->bus_suspended); 273 } 274 275 /* enable remote wakeup on all ports, if told to do so */ 276 if (hcd->self.root_hub->do_remote_wakeup) { 277 /* only enable appropriate wake bits, otherwise the 278 * hardware can not go phy low power mode. If a race 279 * condition happens here(connection change during bits 280 * set), the port change detection will finally fix it. 281 */ 282 if (t1 & PORT_CONNECT) 283 t2 |= PORT_WKOC_E | PORT_WKDISC_E; 284 else 285 t2 |= PORT_WKOC_E | PORT_WKCONN_E; 286 } 287 288 if (t1 != t2) { 289 ehci_vdbg (ehci, "port %d, %08x -> %08x\n", 290 port + 1, t1, t2); 291 ehci_writel(ehci, t2, reg); 292 changed = 1; 293 } 294 } 295 296 if (changed && ehci->has_hostpc) { 297 spin_unlock_irq(&ehci->lock); 298 msleep(5); /* 5 ms for HCD to enter low-power mode */ 299 spin_lock_irq(&ehci->lock); 300 301 port = HCS_N_PORTS(ehci->hcs_params); 302 while (port--) { 303 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; 304 u32 t3; 305 306 t3 = ehci_readl(ehci, hostpc_reg); 307 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); 308 t3 = ehci_readl(ehci, hostpc_reg); 309 ehci_dbg(ehci, "Port %d phy low-power mode %s\n", 310 port, (t3 & HOSTPC_PHCD) ? 311 "succeeded" : "failed"); 312 } 313 } 314 spin_unlock_irq(&ehci->lock); 315 316 /* Apparently some devices need a >= 1-uframe delay here */ 317 if (ehci->bus_suspended) 318 udelay(150); 319 320 /* turn off now-idle HC */ 321 ehci_halt (ehci); 322 323 spin_lock_irq(&ehci->lock); 324 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) 325 ehci_handle_controller_death(ehci); 326 if (ehci->rh_state != EHCI_RH_RUNNING) 327 goto done; 328 ehci->rh_state = EHCI_RH_SUSPENDED; 329 330 end_unlink_async(ehci); 331 unlink_empty_async(ehci); 332 ehci_handle_intr_unlinks(ehci); 333 end_free_itds(ehci); 334 335 /* allow remote wakeup */ 336 mask = INTR_MASK; 337 if (!hcd->self.root_hub->do_remote_wakeup) 338 mask &= ~STS_PCD; 339 ehci_writel(ehci, mask, &ehci->regs->intr_enable); 340 ehci_readl(ehci, &ehci->regs->intr_enable); 341 342 done: 343 ehci->next_statechange = jiffies + msecs_to_jiffies(10); 344 ehci->enabled_hrtimer_events = 0; 345 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; 346 spin_unlock_irq (&ehci->lock); 347 348 hrtimer_cancel(&ehci->hrtimer); 349 return 0; 350 } 351 352 353 /* caller has locked the root hub, and should reset/reinit on error */ 354 static int ehci_bus_resume (struct usb_hcd *hcd) 355 { 356 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 357 u32 temp; 358 u32 power_okay; 359 int i; 360 unsigned long resume_needed = 0; 361 362 if (time_before (jiffies, ehci->next_statechange)) 363 msleep(5); 364 spin_lock_irq (&ehci->lock); 365 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) 366 goto shutdown; 367 368 if (unlikely(ehci->debug)) { 369 if (!dbgp_reset_prep(hcd)) 370 ehci->debug = NULL; 371 else 372 dbgp_external_startup(hcd); 373 } 374 375 /* Ideally and we've got a real resume here, and no port's power 376 * was lost. (For PCI, that means Vaux was maintained.) But we 377 * could instead be restoring a swsusp snapshot -- so that BIOS was 378 * the last user of the controller, not reset/pm hardware keeping 379 * state we gave to it. 380 */ 381 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); 382 ehci_dbg(ehci, "resume root hub%s\n", 383 power_okay ? "" : " after power loss"); 384 385 /* at least some APM implementations will try to deliver 386 * IRQs right away, so delay them until we're ready. 387 */ 388 ehci_writel(ehci, 0, &ehci->regs->intr_enable); 389 390 /* re-init operational registers */ 391 ehci_writel(ehci, 0, &ehci->regs->segment); 392 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); 393 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); 394 395 /* restore CMD_RUN, framelist size, and irq threshold */ 396 ehci->command |= CMD_RUN; 397 ehci_writel(ehci, ehci->command, &ehci->regs->command); 398 ehci->rh_state = EHCI_RH_RUNNING; 399 400 /* 401 * According to Bugzilla #8190, the port status for some controllers 402 * will be wrong without a delay. At their wrong status, the port 403 * is enabled, but not suspended neither resumed. 404 */ 405 i = HCS_N_PORTS(ehci->hcs_params); 406 while (i--) { 407 temp = ehci_readl(ehci, &ehci->regs->port_status[i]); 408 if ((temp & PORT_PE) && 409 !(temp & (PORT_SUSPEND | PORT_RESUME))) { 410 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); 411 spin_unlock_irq(&ehci->lock); 412 msleep(8); 413 spin_lock_irq(&ehci->lock); 414 break; 415 } 416 } 417 418 if (ehci->shutdown) 419 goto shutdown; 420 421 /* clear phy low-power mode before resume */ 422 if (ehci->bus_suspended && ehci->has_hostpc) { 423 i = HCS_N_PORTS(ehci->hcs_params); 424 while (i--) { 425 if (test_bit(i, &ehci->bus_suspended)) { 426 u32 __iomem *hostpc_reg = 427 &ehci->regs->hostpc[i]; 428 429 temp = ehci_readl(ehci, hostpc_reg); 430 ehci_writel(ehci, temp & ~HOSTPC_PHCD, 431 hostpc_reg); 432 } 433 } 434 spin_unlock_irq(&ehci->lock); 435 msleep(5); 436 spin_lock_irq(&ehci->lock); 437 if (ehci->shutdown) 438 goto shutdown; 439 } 440 441 /* manually resume the ports we suspended during bus_suspend() */ 442 i = HCS_N_PORTS (ehci->hcs_params); 443 while (i--) { 444 temp = ehci_readl(ehci, &ehci->regs->port_status [i]); 445 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); 446 if (test_bit(i, &ehci->bus_suspended) && 447 (temp & PORT_SUSPEND)) { 448 temp |= PORT_RESUME; 449 set_bit(i, &resume_needed); 450 } 451 ehci_writel(ehci, temp, &ehci->regs->port_status [i]); 452 } 453 454 /* msleep for 20ms only if code is trying to resume port */ 455 if (resume_needed) { 456 spin_unlock_irq(&ehci->lock); 457 msleep(20); 458 spin_lock_irq(&ehci->lock); 459 if (ehci->shutdown) 460 goto shutdown; 461 } 462 463 i = HCS_N_PORTS (ehci->hcs_params); 464 while (i--) { 465 temp = ehci_readl(ehci, &ehci->regs->port_status [i]); 466 if (test_bit(i, &resume_needed)) { 467 temp &= ~(PORT_RWC_BITS | PORT_RESUME); 468 ehci_writel(ehci, temp, &ehci->regs->port_status [i]); 469 ehci_vdbg (ehci, "resumed port %d\n", i + 1); 470 } 471 } 472 473 ehci->next_statechange = jiffies + msecs_to_jiffies(5); 474 spin_unlock_irq(&ehci->lock); 475 476 ehci_handover_companion_ports(ehci); 477 478 /* Now we can safely re-enable irqs */ 479 spin_lock_irq(&ehci->lock); 480 if (ehci->shutdown) 481 goto shutdown; 482 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); 483 (void) ehci_readl(ehci, &ehci->regs->intr_enable); 484 spin_unlock_irq(&ehci->lock); 485 486 return 0; 487 488 shutdown: 489 spin_unlock_irq(&ehci->lock); 490 return -ESHUTDOWN; 491 } 492 493 #else 494 495 #define ehci_bus_suspend NULL 496 #define ehci_bus_resume NULL 497 498 #endif /* CONFIG_PM */ 499 500 /*-------------------------------------------------------------------------*/ 501 502 /* 503 * Sets the owner of a port 504 */ 505 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) 506 { 507 u32 __iomem *status_reg; 508 u32 port_status; 509 int try; 510 511 status_reg = &ehci->regs->port_status[portnum]; 512 513 /* 514 * The controller won't set the OWNER bit if the port is 515 * enabled, so this loop will sometimes require at least two 516 * iterations: one to disable the port and one to set OWNER. 517 */ 518 for (try = 4; try > 0; --try) { 519 spin_lock_irq(&ehci->lock); 520 port_status = ehci_readl(ehci, status_reg); 521 if ((port_status & PORT_OWNER) == new_owner 522 || (port_status & (PORT_OWNER | PORT_CONNECT)) 523 == 0) 524 try = 0; 525 else { 526 port_status ^= PORT_OWNER; 527 port_status &= ~(PORT_PE | PORT_RWC_BITS); 528 ehci_writel(ehci, port_status, status_reg); 529 } 530 spin_unlock_irq(&ehci->lock); 531 if (try > 1) 532 msleep(5); 533 } 534 } 535 536 /*-------------------------------------------------------------------------*/ 537 538 static int check_reset_complete ( 539 struct ehci_hcd *ehci, 540 int index, 541 u32 __iomem *status_reg, 542 int port_status 543 ) { 544 if (!(port_status & PORT_CONNECT)) 545 return port_status; 546 547 /* if reset finished and it's still not enabled -- handoff */ 548 if (!(port_status & PORT_PE)) { 549 550 /* with integrated TT, there's nobody to hand it to! */ 551 if (ehci_is_TDI(ehci)) { 552 ehci_dbg (ehci, 553 "Failed to enable port %d on root hub TT\n", 554 index+1); 555 return port_status; 556 } 557 558 ehci_dbg (ehci, "port %d full speed --> companion\n", 559 index + 1); 560 561 // what happens if HCS_N_CC(params) == 0 ? 562 port_status |= PORT_OWNER; 563 port_status &= ~PORT_RWC_BITS; 564 ehci_writel(ehci, port_status, status_reg); 565 566 /* ensure 440EPX ohci controller state is operational */ 567 if (ehci->has_amcc_usb23) 568 set_ohci_hcfs(ehci, 1); 569 } else { 570 ehci_dbg(ehci, "port %d reset complete, port enabled\n", 571 index + 1); 572 /* ensure 440EPx ohci controller state is suspended */ 573 if (ehci->has_amcc_usb23) 574 set_ohci_hcfs(ehci, 0); 575 } 576 577 return port_status; 578 } 579 580 /*-------------------------------------------------------------------------*/ 581 582 583 /* build "status change" packet (one or two bytes) from HC registers */ 584 585 static int 586 ehci_hub_status_data (struct usb_hcd *hcd, char *buf) 587 { 588 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 589 u32 temp, status; 590 u32 mask; 591 int ports, i, retval = 1; 592 unsigned long flags; 593 u32 ppcd = 0; 594 595 /* init status to no-changes */ 596 buf [0] = 0; 597 ports = HCS_N_PORTS (ehci->hcs_params); 598 if (ports > 7) { 599 buf [1] = 0; 600 retval++; 601 } 602 603 /* Inform the core about resumes-in-progress by returning 604 * a non-zero value even if there are no status changes. 605 */ 606 status = ehci->resuming_ports; 607 608 /* Some boards (mostly VIA?) report bogus overcurrent indications, 609 * causing massive log spam unless we completely ignore them. It 610 * may be relevant that VIA VT8235 controllers, where PORT_POWER is 611 * always set, seem to clear PORT_OCC and PORT_CSC when writing to 612 * PORT_POWER; that's surprising, but maybe within-spec. 613 */ 614 if (!ignore_oc) 615 mask = PORT_CSC | PORT_PEC | PORT_OCC; 616 else 617 mask = PORT_CSC | PORT_PEC; 618 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND 619 620 /* no hub change reports (bit 0) for now (power, ...) */ 621 622 /* port N changes (bit N)? */ 623 spin_lock_irqsave (&ehci->lock, flags); 624 625 /* get per-port change detect bits */ 626 if (ehci->has_ppcd) 627 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; 628 629 for (i = 0; i < ports; i++) { 630 /* leverage per-port change bits feature */ 631 if (ehci->has_ppcd && !(ppcd & (1 << i))) 632 continue; 633 temp = ehci_readl(ehci, &ehci->regs->port_status [i]); 634 635 /* 636 * Return status information even for ports with OWNER set. 637 * Otherwise khubd wouldn't see the disconnect event when a 638 * high-speed device is switched over to the companion 639 * controller by the user. 640 */ 641 642 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) 643 || (ehci->reset_done[i] && time_after_eq( 644 jiffies, ehci->reset_done[i]))) { 645 if (i < 7) 646 buf [0] |= 1 << (i + 1); 647 else 648 buf [1] |= 1 << (i - 7); 649 status = STS_PCD; 650 } 651 } 652 653 /* If a resume is in progress, make sure it can finish */ 654 if (ehci->resuming_ports) 655 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); 656 657 spin_unlock_irqrestore (&ehci->lock, flags); 658 return status ? retval : 0; 659 } 660 661 /*-------------------------------------------------------------------------*/ 662 663 static void 664 ehci_hub_descriptor ( 665 struct ehci_hcd *ehci, 666 struct usb_hub_descriptor *desc 667 ) { 668 int ports = HCS_N_PORTS (ehci->hcs_params); 669 u16 temp; 670 671 desc->bDescriptorType = 0x29; 672 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ 673 desc->bHubContrCurrent = 0; 674 675 desc->bNbrPorts = ports; 676 temp = 1 + (ports / 8); 677 desc->bDescLength = 7 + 2 * temp; 678 679 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ 680 memset(&desc->u.hs.DeviceRemovable[0], 0, temp); 681 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); 682 683 temp = 0x0008; /* per-port overcurrent reporting */ 684 if (HCS_PPC (ehci->hcs_params)) 685 temp |= 0x0001; /* per-port power control */ 686 else 687 temp |= 0x0002; /* no power switching */ 688 #if 0 689 // re-enable when we support USB_PORT_FEAT_INDICATOR below. 690 if (HCS_INDICATOR (ehci->hcs_params)) 691 temp |= 0x0080; /* per-port indicators (LEDs) */ 692 #endif 693 desc->wHubCharacteristics = cpu_to_le16(temp); 694 } 695 696 /*-------------------------------------------------------------------------*/ 697 698 static int ehci_hub_control ( 699 struct usb_hcd *hcd, 700 u16 typeReq, 701 u16 wValue, 702 u16 wIndex, 703 char *buf, 704 u16 wLength 705 ) { 706 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 707 int ports = HCS_N_PORTS (ehci->hcs_params); 708 u32 __iomem *status_reg = &ehci->regs->port_status[ 709 (wIndex & 0xff) - 1]; 710 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1]; 711 u32 temp, temp1, status; 712 unsigned long flags; 713 int retval = 0; 714 unsigned selector; 715 716 /* 717 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. 718 * HCS_INDICATOR may say we can change LEDs to off/amber/green. 719 * (track current state ourselves) ... blink for diagnostics, 720 * power, "this is the one", etc. EHCI spec supports this. 721 */ 722 723 spin_lock_irqsave (&ehci->lock, flags); 724 switch (typeReq) { 725 case ClearHubFeature: 726 switch (wValue) { 727 case C_HUB_LOCAL_POWER: 728 case C_HUB_OVER_CURRENT: 729 /* no hub-wide feature/status flags */ 730 break; 731 default: 732 goto error; 733 } 734 break; 735 case ClearPortFeature: 736 if (!wIndex || wIndex > ports) 737 goto error; 738 wIndex--; 739 temp = ehci_readl(ehci, status_reg); 740 temp &= ~PORT_RWC_BITS; 741 742 /* 743 * Even if OWNER is set, so the port is owned by the 744 * companion controller, khubd needs to be able to clear 745 * the port-change status bits (especially 746 * USB_PORT_STAT_C_CONNECTION). 747 */ 748 749 switch (wValue) { 750 case USB_PORT_FEAT_ENABLE: 751 ehci_writel(ehci, temp & ~PORT_PE, status_reg); 752 break; 753 case USB_PORT_FEAT_C_ENABLE: 754 ehci_writel(ehci, temp | PORT_PEC, status_reg); 755 break; 756 case USB_PORT_FEAT_SUSPEND: 757 if (temp & PORT_RESET) 758 goto error; 759 if (ehci->no_selective_suspend) 760 break; 761 #ifdef CONFIG_USB_OTG 762 if ((hcd->self.otg_port == (wIndex + 1)) 763 && hcd->self.b_hnp_enable) { 764 otg_start_hnp(hcd->phy->otg); 765 break; 766 } 767 #endif 768 if (!(temp & PORT_SUSPEND)) 769 break; 770 if ((temp & PORT_PE) == 0) 771 goto error; 772 773 /* clear phy low-power mode before resume */ 774 if (ehci->has_hostpc) { 775 temp1 = ehci_readl(ehci, hostpc_reg); 776 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, 777 hostpc_reg); 778 spin_unlock_irqrestore(&ehci->lock, flags); 779 msleep(5);/* wait to leave low-power mode */ 780 spin_lock_irqsave(&ehci->lock, flags); 781 } 782 /* resume signaling for 20 msec */ 783 temp &= ~PORT_WAKE_BITS; 784 ehci_writel(ehci, temp | PORT_RESUME, status_reg); 785 ehci->reset_done[wIndex] = jiffies 786 + msecs_to_jiffies(20); 787 break; 788 case USB_PORT_FEAT_C_SUSPEND: 789 clear_bit(wIndex, &ehci->port_c_suspend); 790 break; 791 case USB_PORT_FEAT_POWER: 792 if (HCS_PPC (ehci->hcs_params)) 793 ehci_writel(ehci, temp & ~PORT_POWER, 794 status_reg); 795 break; 796 case USB_PORT_FEAT_C_CONNECTION: 797 ehci_writel(ehci, temp | PORT_CSC, status_reg); 798 break; 799 case USB_PORT_FEAT_C_OVER_CURRENT: 800 ehci_writel(ehci, temp | PORT_OCC, status_reg); 801 break; 802 case USB_PORT_FEAT_C_RESET: 803 /* GetPortStatus clears reset */ 804 break; 805 default: 806 goto error; 807 } 808 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ 809 break; 810 case GetHubDescriptor: 811 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) 812 buf); 813 break; 814 case GetHubStatus: 815 /* no hub-wide feature/status flags */ 816 memset (buf, 0, 4); 817 //cpu_to_le32s ((u32 *) buf); 818 break; 819 case GetPortStatus: 820 if (!wIndex || wIndex > ports) 821 goto error; 822 wIndex--; 823 status = 0; 824 temp = ehci_readl(ehci, status_reg); 825 826 // wPortChange bits 827 if (temp & PORT_CSC) 828 status |= USB_PORT_STAT_C_CONNECTION << 16; 829 if (temp & PORT_PEC) 830 status |= USB_PORT_STAT_C_ENABLE << 16; 831 832 if ((temp & PORT_OCC) && !ignore_oc){ 833 status |= USB_PORT_STAT_C_OVERCURRENT << 16; 834 835 /* 836 * Hubs should disable port power on over-current. 837 * However, not all EHCI implementations do this 838 * automatically, even if they _do_ support per-port 839 * power switching; they're allowed to just limit the 840 * current. khubd will turn the power back on. 841 */ 842 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) { 843 ehci_writel(ehci, 844 temp & ~(PORT_RWC_BITS | PORT_POWER), 845 status_reg); 846 temp = ehci_readl(ehci, status_reg); 847 } 848 } 849 850 /* whoever resumes must GetPortStatus to complete it!! */ 851 if (temp & PORT_RESUME) { 852 853 /* Remote Wakeup received? */ 854 if (!ehci->reset_done[wIndex]) { 855 /* resume signaling for 20 msec */ 856 ehci->reset_done[wIndex] = jiffies 857 + msecs_to_jiffies(20); 858 usb_hcd_start_port_resume(&hcd->self, wIndex); 859 /* check the port again */ 860 mod_timer(&ehci_to_hcd(ehci)->rh_timer, 861 ehci->reset_done[wIndex]); 862 } 863 864 /* resume completed? */ 865 else if (time_after_eq(jiffies, 866 ehci->reset_done[wIndex])) { 867 clear_bit(wIndex, &ehci->suspended_ports); 868 set_bit(wIndex, &ehci->port_c_suspend); 869 ehci->reset_done[wIndex] = 0; 870 usb_hcd_end_port_resume(&hcd->self, wIndex); 871 872 /* stop resume signaling */ 873 temp = ehci_readl(ehci, status_reg); 874 ehci_writel(ehci, 875 temp & ~(PORT_RWC_BITS | PORT_RESUME), 876 status_reg); 877 clear_bit(wIndex, &ehci->resuming_ports); 878 retval = handshake(ehci, status_reg, 879 PORT_RESUME, 0, 2000 /* 2msec */); 880 if (retval != 0) { 881 ehci_err(ehci, 882 "port %d resume error %d\n", 883 wIndex + 1, retval); 884 goto error; 885 } 886 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); 887 } 888 } 889 890 /* whoever resets must GetPortStatus to complete it!! */ 891 if ((temp & PORT_RESET) 892 && time_after_eq(jiffies, 893 ehci->reset_done[wIndex])) { 894 status |= USB_PORT_STAT_C_RESET << 16; 895 ehci->reset_done [wIndex] = 0; 896 clear_bit(wIndex, &ehci->resuming_ports); 897 898 /* force reset to complete */ 899 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), 900 status_reg); 901 /* REVISIT: some hardware needs 550+ usec to clear 902 * this bit; seems too long to spin routinely... 903 */ 904 retval = handshake(ehci, status_reg, 905 PORT_RESET, 0, 1000); 906 if (retval != 0) { 907 ehci_err (ehci, "port %d reset error %d\n", 908 wIndex + 1, retval); 909 goto error; 910 } 911 912 /* see what we found out */ 913 temp = check_reset_complete (ehci, wIndex, status_reg, 914 ehci_readl(ehci, status_reg)); 915 } 916 917 if (!(temp & (PORT_RESUME|PORT_RESET))) { 918 ehci->reset_done[wIndex] = 0; 919 clear_bit(wIndex, &ehci->resuming_ports); 920 } 921 922 /* transfer dedicated ports to the companion hc */ 923 if ((temp & PORT_CONNECT) && 924 test_bit(wIndex, &ehci->companion_ports)) { 925 temp &= ~PORT_RWC_BITS; 926 temp |= PORT_OWNER; 927 ehci_writel(ehci, temp, status_reg); 928 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); 929 temp = ehci_readl(ehci, status_reg); 930 } 931 932 /* 933 * Even if OWNER is set, there's no harm letting khubd 934 * see the wPortStatus values (they should all be 0 except 935 * for PORT_POWER anyway). 936 */ 937 938 if (temp & PORT_CONNECT) { 939 status |= USB_PORT_STAT_CONNECTION; 940 // status may be from integrated TT 941 if (ehci->has_hostpc) { 942 temp1 = ehci_readl(ehci, hostpc_reg); 943 status |= ehci_port_speed(ehci, temp1); 944 } else 945 status |= ehci_port_speed(ehci, temp); 946 } 947 if (temp & PORT_PE) 948 status |= USB_PORT_STAT_ENABLE; 949 950 /* maybe the port was unsuspended without our knowledge */ 951 if (temp & (PORT_SUSPEND|PORT_RESUME)) { 952 status |= USB_PORT_STAT_SUSPEND; 953 } else if (test_bit(wIndex, &ehci->suspended_ports)) { 954 clear_bit(wIndex, &ehci->suspended_ports); 955 clear_bit(wIndex, &ehci->resuming_ports); 956 ehci->reset_done[wIndex] = 0; 957 if (temp & PORT_PE) 958 set_bit(wIndex, &ehci->port_c_suspend); 959 usb_hcd_end_port_resume(&hcd->self, wIndex); 960 } 961 962 if (temp & PORT_OC) 963 status |= USB_PORT_STAT_OVERCURRENT; 964 if (temp & PORT_RESET) 965 status |= USB_PORT_STAT_RESET; 966 if (temp & PORT_POWER) 967 status |= USB_PORT_STAT_POWER; 968 if (test_bit(wIndex, &ehci->port_c_suspend)) 969 status |= USB_PORT_STAT_C_SUSPEND << 16; 970 971 #ifndef VERBOSE_DEBUG 972 if (status & ~0xffff) /* only if wPortChange is interesting */ 973 #endif 974 dbg_port (ehci, "GetStatus", wIndex + 1, temp); 975 put_unaligned_le32(status, buf); 976 break; 977 case SetHubFeature: 978 switch (wValue) { 979 case C_HUB_LOCAL_POWER: 980 case C_HUB_OVER_CURRENT: 981 /* no hub-wide feature/status flags */ 982 break; 983 default: 984 goto error; 985 } 986 break; 987 case SetPortFeature: 988 selector = wIndex >> 8; 989 wIndex &= 0xff; 990 if (unlikely(ehci->debug)) { 991 /* If the debug port is active any port 992 * feature requests should get denied */ 993 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && 994 (readl(&ehci->debug->control) & DBGP_ENABLED)) { 995 retval = -ENODEV; 996 goto error_exit; 997 } 998 } 999 if (!wIndex || wIndex > ports) 1000 goto error; 1001 wIndex--; 1002 temp = ehci_readl(ehci, status_reg); 1003 if (temp & PORT_OWNER) 1004 break; 1005 1006 temp &= ~PORT_RWC_BITS; 1007 switch (wValue) { 1008 case USB_PORT_FEAT_SUSPEND: 1009 if (ehci->no_selective_suspend) 1010 break; 1011 if ((temp & PORT_PE) == 0 1012 || (temp & PORT_RESET) != 0) 1013 goto error; 1014 1015 /* After above check the port must be connected. 1016 * Set appropriate bit thus could put phy into low power 1017 * mode if we have hostpc feature 1018 */ 1019 temp &= ~PORT_WKCONN_E; 1020 temp |= PORT_WKDISC_E | PORT_WKOC_E; 1021 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); 1022 if (ehci->has_hostpc) { 1023 spin_unlock_irqrestore(&ehci->lock, flags); 1024 msleep(5);/* 5ms for HCD enter low pwr mode */ 1025 spin_lock_irqsave(&ehci->lock, flags); 1026 temp1 = ehci_readl(ehci, hostpc_reg); 1027 ehci_writel(ehci, temp1 | HOSTPC_PHCD, 1028 hostpc_reg); 1029 temp1 = ehci_readl(ehci, hostpc_reg); 1030 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", 1031 wIndex, (temp1 & HOSTPC_PHCD) ? 1032 "succeeded" : "failed"); 1033 } 1034 set_bit(wIndex, &ehci->suspended_ports); 1035 break; 1036 case USB_PORT_FEAT_POWER: 1037 if (HCS_PPC (ehci->hcs_params)) 1038 ehci_writel(ehci, temp | PORT_POWER, 1039 status_reg); 1040 break; 1041 case USB_PORT_FEAT_RESET: 1042 if (temp & PORT_RESUME) 1043 goto error; 1044 /* line status bits may report this as low speed, 1045 * which can be fine if this root hub has a 1046 * transaction translator built in. 1047 */ 1048 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT 1049 && !ehci_is_TDI(ehci) 1050 && PORT_USB11 (temp)) { 1051 ehci_dbg (ehci, 1052 "port %d low speed --> companion\n", 1053 wIndex + 1); 1054 temp |= PORT_OWNER; 1055 } else { 1056 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); 1057 temp |= PORT_RESET; 1058 temp &= ~PORT_PE; 1059 1060 /* 1061 * caller must wait, then call GetPortStatus 1062 * usb 2.0 spec says 50 ms resets on root 1063 */ 1064 ehci->reset_done [wIndex] = jiffies 1065 + msecs_to_jiffies (50); 1066 } 1067 ehci_writel(ehci, temp, status_reg); 1068 break; 1069 1070 /* For downstream facing ports (these): one hub port is put 1071 * into test mode according to USB2 11.24.2.13, then the hub 1072 * must be reset (which for root hub now means rmmod+modprobe, 1073 * or else system reboot). See EHCI 2.3.9 and 4.14 for info 1074 * about the EHCI-specific stuff. 1075 */ 1076 case USB_PORT_FEAT_TEST: 1077 if (!selector || selector > 5) 1078 goto error; 1079 spin_unlock_irqrestore(&ehci->lock, flags); 1080 ehci_quiesce(ehci); 1081 spin_lock_irqsave(&ehci->lock, flags); 1082 1083 /* Put all enabled ports into suspend */ 1084 while (ports--) { 1085 u32 __iomem *sreg = 1086 &ehci->regs->port_status[ports]; 1087 1088 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; 1089 if (temp & PORT_PE) 1090 ehci_writel(ehci, temp | PORT_SUSPEND, 1091 sreg); 1092 } 1093 1094 spin_unlock_irqrestore(&ehci->lock, flags); 1095 ehci_halt(ehci); 1096 spin_lock_irqsave(&ehci->lock, flags); 1097 1098 temp = ehci_readl(ehci, status_reg); 1099 temp |= selector << 16; 1100 ehci_writel(ehci, temp, status_reg); 1101 break; 1102 1103 default: 1104 goto error; 1105 } 1106 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ 1107 break; 1108 1109 default: 1110 error: 1111 /* "stall" on error */ 1112 retval = -EPIPE; 1113 } 1114 error_exit: 1115 spin_unlock_irqrestore (&ehci->lock, flags); 1116 return retval; 1117 } 1118 1119 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) 1120 { 1121 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 1122 1123 if (ehci_is_TDI(ehci)) 1124 return; 1125 set_owner(ehci, --portnum, PORT_OWNER); 1126 } 1127 1128 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) 1129 { 1130 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 1131 u32 __iomem *reg; 1132 1133 if (ehci_is_TDI(ehci)) 1134 return 0; 1135 reg = &ehci->regs->port_status[portnum - 1]; 1136 return ehci_readl(ehci, reg) & PORT_OWNER; 1137 } 1138