2 * Copyright (C) 2001-2004 by David Brownell
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.
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
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.
19 /* this file is part of ehci-hcd.c */
21 /*-------------------------------------------------------------------------*/
24 * EHCI Root Hub ... the nonsharable stuff
26 * Registers don't need cpu_to_le32, that happens transparently
29 /*-------------------------------------------------------------------------*/
31 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
35 static int ehci_hub_control(
44 /* After a power loss, ports that were owned by the companion must be
45 * reset so that the companion can still own them.
47 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
53 struct usb_hcd *hcd = ehci_to_hcd(ehci);
55 if (!ehci->owned_ports)
58 /* Give the connections some time to appear */
61 port = HCS_N_PORTS(ehci->hcs_params);
63 if (test_bit(port, &ehci->owned_ports)) {
64 reg = &ehci->regs->port_status[port];
65 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
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);
73 ehci_hub_control(hcd, SetPortFeature,
74 USB_PORT_FEAT_RESET, port + 1,
79 if (!ehci->owned_ports)
81 msleep(90); /* Wait for resets to complete */
83 port = HCS_N_PORTS(ehci->hcs_params);
85 if (test_bit(port, &ehci->owned_ports)) {
86 ehci_hub_control(hcd, GetPortStatus,
88 (char *) &buf, sizeof(buf));
90 /* The companion should now own the port,
91 * but if something went wrong the port must not
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);
99 ehci_dbg(ehci, "failed handover port %d: %x\n",
101 ehci_writel(ehci, status & ~PORT_PE, reg);
106 ehci->owned_ports = 0;
109 static int ehci_bus_suspend (struct usb_hcd *hcd)
111 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
115 ehci_dbg(ehci, "suspend root hub\n");
117 if (time_before (jiffies, ehci->next_statechange))
119 del_timer_sync(&ehci->watchdog);
120 del_timer_sync(&ehci->iaa_watchdog);
122 port = HCS_N_PORTS (ehci->hcs_params);
123 spin_lock_irq (&ehci->lock);
125 /* stop schedules, clean any completed work */
126 if (HC_IS_RUNNING(hcd->state)) {
128 hcd->state = HC_STATE_QUIESCING;
130 ehci->command = ehci_readl(ehci, &ehci->regs->command);
133 /* Unlike other USB host controller types, EHCI doesn't have
134 * any notion of "global" or bus-wide suspend. The driver has
135 * to manually suspend all the active unsuspended ports, and
136 * then manually resume them in the bus_resume() routine.
138 ehci->bus_suspended = 0;
139 ehci->owned_ports = 0;
141 u32 __iomem *reg = &ehci->regs->port_status [port];
142 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
145 /* keep track of which ports we suspend */
147 set_bit(port, &ehci->owned_ports);
148 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
150 set_bit(port, &ehci->bus_suspended);
153 /* enable remote wakeup on all ports */
154 if (hcd->self.root_hub->do_remote_wakeup)
155 t2 |= PORT_WAKE_BITS;
157 t2 &= ~PORT_WAKE_BITS;
160 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
162 ehci_writel(ehci, t2, reg);
166 /* Apparently some devices need a >= 1-uframe delay here */
167 if (ehci->bus_suspended)
170 /* turn off now-idle HC */
172 hcd->state = HC_STATE_SUSPENDED;
175 end_unlink_async(ehci);
177 /* allow remote wakeup */
179 if (!hcd->self.root_hub->do_remote_wakeup)
181 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
182 ehci_readl(ehci, &ehci->regs->intr_enable);
184 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
185 spin_unlock_irq (&ehci->lock);
190 /* caller has locked the root hub, and should reset/reinit on error */
191 static int ehci_bus_resume (struct usb_hcd *hcd)
193 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
197 u8 resume_needed = 0;
199 if (time_before (jiffies, ehci->next_statechange))
201 spin_lock_irq (&ehci->lock);
202 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
203 spin_unlock_irq(&ehci->lock);
207 /* Ideally and we've got a real resume here, and no port's power
208 * was lost. (For PCI, that means Vaux was maintained.) But we
209 * could instead be restoring a swsusp snapshot -- so that BIOS was
210 * the last user of the controller, not reset/pm hardware keeping
211 * state we gave to it.
213 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
214 ehci_dbg(ehci, "resume root hub%s\n",
215 power_okay ? "" : " after power loss");
217 /* at least some APM implementations will try to deliver
218 * IRQs right away, so delay them until we're ready.
220 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
222 /* re-init operational registers */
223 ehci_writel(ehci, 0, &ehci->regs->segment);
224 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
225 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
227 /* restore CMD_RUN, framelist size, and irq threshold */
228 ehci_writel(ehci, ehci->command, &ehci->regs->command);
230 /* Some controller/firmware combinations need a delay during which
231 * they set up the port statuses. See Bugzilla #8190. */
232 spin_unlock_irq(&ehci->lock);
234 spin_lock_irq(&ehci->lock);
236 /* manually resume the ports we suspended during bus_suspend() */
237 i = HCS_N_PORTS (ehci->hcs_params);
239 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
240 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
241 if (test_bit(i, &ehci->bus_suspended) &&
242 (temp & PORT_SUSPEND)) {
246 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
249 /* msleep for 20ms only if code is trying to resume port */
251 spin_unlock_irq(&ehci->lock);
253 spin_lock_irq(&ehci->lock);
256 i = HCS_N_PORTS (ehci->hcs_params);
258 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
259 if (test_bit(i, &ehci->bus_suspended) &&
260 (temp & PORT_SUSPEND)) {
261 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
262 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
263 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
266 (void) ehci_readl(ehci, &ehci->regs->command);
268 /* maybe re-activate the schedule(s) */
270 if (ehci->async->qh_next.qh)
272 if (ehci->periodic_sched)
275 ehci->command |= temp;
276 ehci_writel(ehci, ehci->command, &ehci->regs->command);
279 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
280 hcd->state = HC_STATE_RUNNING;
282 /* Now we can safely re-enable irqs */
283 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
285 spin_unlock_irq (&ehci->lock);
286 ehci_handover_companion_ports(ehci);
292 #define ehci_bus_suspend NULL
293 #define ehci_bus_resume NULL
295 #endif /* CONFIG_PM */
297 /*-------------------------------------------------------------------------*/
299 /* Display the ports dedicated to the companion controller */
300 static ssize_t show_companion(struct device *dev,
301 struct device_attribute *attr,
304 struct ehci_hcd *ehci;
305 int nports, index, n;
306 int count = PAGE_SIZE;
309 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
310 nports = HCS_N_PORTS(ehci->hcs_params);
312 for (index = 0; index < nports; ++index) {
313 if (test_bit(index, &ehci->companion_ports)) {
314 n = scnprintf(ptr, count, "%d\n", index + 1);
323 * Sets the owner of a port
325 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
327 u32 __iomem *status_reg;
331 status_reg = &ehci->regs->port_status[portnum];
334 * The controller won't set the OWNER bit if the port is
335 * enabled, so this loop will sometimes require at least two
336 * iterations: one to disable the port and one to set OWNER.
338 for (try = 4; try > 0; --try) {
339 spin_lock_irq(&ehci->lock);
340 port_status = ehci_readl(ehci, status_reg);
341 if ((port_status & PORT_OWNER) == new_owner
342 || (port_status & (PORT_OWNER | PORT_CONNECT))
346 port_status ^= PORT_OWNER;
347 port_status &= ~(PORT_PE | PORT_RWC_BITS);
348 ehci_writel(ehci, port_status, status_reg);
350 spin_unlock_irq(&ehci->lock);
357 * Dedicate or undedicate a port to the companion controller.
358 * Syntax is "[-]portnum", where a leading '-' sign means
359 * return control of the port to the EHCI controller.
361 static ssize_t store_companion(struct device *dev,
362 struct device_attribute *attr,
363 const char *buf, size_t count)
365 struct ehci_hcd *ehci;
366 int portnum, new_owner;
368 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
369 new_owner = PORT_OWNER; /* Owned by companion */
370 if (sscanf(buf, "%d", &portnum) != 1)
374 new_owner = 0; /* Owned by EHCI */
376 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
380 set_bit(portnum, &ehci->companion_ports);
382 clear_bit(portnum, &ehci->companion_ports);
383 set_owner(ehci, portnum, new_owner);
386 static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
388 static inline void create_companion_file(struct ehci_hcd *ehci)
392 /* with integrated TT there is no companion! */
393 if (!ehci_is_TDI(ehci))
394 i = device_create_file(ehci_to_hcd(ehci)->self.dev,
395 &dev_attr_companion);
398 static inline void remove_companion_file(struct ehci_hcd *ehci)
400 /* with integrated TT there is no companion! */
401 if (!ehci_is_TDI(ehci))
402 device_remove_file(ehci_to_hcd(ehci)->self.dev,
403 &dev_attr_companion);
407 /*-------------------------------------------------------------------------*/
409 static int check_reset_complete (
410 struct ehci_hcd *ehci,
412 u32 __iomem *status_reg,
415 if (!(port_status & PORT_CONNECT))
418 /* if reset finished and it's still not enabled -- handoff */
419 if (!(port_status & PORT_PE)) {
421 /* with integrated TT, there's nobody to hand it to! */
422 if (ehci_is_TDI(ehci)) {
424 "Failed to enable port %d on root hub TT\n",
429 ehci_dbg (ehci, "port %d full speed --> companion\n",
432 // what happens if HCS_N_CC(params) == 0 ?
433 port_status |= PORT_OWNER;
434 port_status &= ~PORT_RWC_BITS;
435 ehci_writel(ehci, port_status, status_reg);
438 ehci_dbg (ehci, "port %d high speed\n", index + 1);
443 /*-------------------------------------------------------------------------*/
446 /* build "status change" packet (one or two bytes) from HC registers */
449 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
451 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
452 u32 temp, status = 0;
454 int ports, i, retval = 1;
457 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
458 if (!HC_IS_RUNNING(hcd->state))
461 /* init status to no-changes */
463 ports = HCS_N_PORTS (ehci->hcs_params);
469 /* Some boards (mostly VIA?) report bogus overcurrent indications,
470 * causing massive log spam unless we completely ignore them. It
471 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
472 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
473 * PORT_POWER; that's surprising, but maybe within-spec.
476 mask = PORT_CSC | PORT_PEC | PORT_OCC;
478 mask = PORT_CSC | PORT_PEC;
479 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
481 /* no hub change reports (bit 0) for now (power, ...) */
483 /* port N changes (bit N)? */
484 spin_lock_irqsave (&ehci->lock, flags);
485 for (i = 0; i < ports; i++) {
486 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
489 * Return status information even for ports with OWNER set.
490 * Otherwise khubd wouldn't see the disconnect event when a
491 * high-speed device is switched over to the companion
492 * controller by the user.
495 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
496 || (ehci->reset_done[i] && time_after_eq(
497 jiffies, ehci->reset_done[i]))) {
499 buf [0] |= 1 << (i + 1);
501 buf [1] |= 1 << (i - 7);
505 /* FIXME autosuspend idle root hubs */
506 spin_unlock_irqrestore (&ehci->lock, flags);
507 return status ? retval : 0;
510 /*-------------------------------------------------------------------------*/
513 ehci_hub_descriptor (
514 struct ehci_hcd *ehci,
515 struct usb_hub_descriptor *desc
517 int ports = HCS_N_PORTS (ehci->hcs_params);
520 desc->bDescriptorType = 0x29;
521 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
522 desc->bHubContrCurrent = 0;
524 desc->bNbrPorts = ports;
525 temp = 1 + (ports / 8);
526 desc->bDescLength = 7 + 2 * temp;
528 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
529 memset (&desc->bitmap [0], 0, temp);
530 memset (&desc->bitmap [temp], 0xff, temp);
532 temp = 0x0008; /* per-port overcurrent reporting */
533 if (HCS_PPC (ehci->hcs_params))
534 temp |= 0x0001; /* per-port power control */
536 temp |= 0x0002; /* no power switching */
538 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
539 if (HCS_INDICATOR (ehci->hcs_params))
540 temp |= 0x0080; /* per-port indicators (LEDs) */
542 desc->wHubCharacteristics = cpu_to_le16(temp);
545 /*-------------------------------------------------------------------------*/
547 static int ehci_hub_control (
555 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
556 int ports = HCS_N_PORTS (ehci->hcs_params);
557 u32 __iomem *status_reg = &ehci->regs->port_status[
558 (wIndex & 0xff) - 1];
565 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
566 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
567 * (track current state ourselves) ... blink for diagnostics,
568 * power, "this is the one", etc. EHCI spec supports this.
571 spin_lock_irqsave (&ehci->lock, flags);
573 case ClearHubFeature:
575 case C_HUB_LOCAL_POWER:
576 case C_HUB_OVER_CURRENT:
577 /* no hub-wide feature/status flags */
583 case ClearPortFeature:
584 if (!wIndex || wIndex > ports)
587 temp = ehci_readl(ehci, status_reg);
590 * Even if OWNER is set, so the port is owned by the
591 * companion controller, khubd needs to be able to clear
592 * the port-change status bits (especially
593 * USB_PORT_FEAT_C_CONNECTION).
597 case USB_PORT_FEAT_ENABLE:
598 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
600 case USB_PORT_FEAT_C_ENABLE:
601 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
604 case USB_PORT_FEAT_SUSPEND:
605 if (temp & PORT_RESET)
607 if (ehci->no_selective_suspend)
609 if (temp & PORT_SUSPEND) {
610 if ((temp & PORT_PE) == 0)
612 /* resume signaling for 20 msec */
613 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
614 ehci_writel(ehci, temp | PORT_RESUME,
616 ehci->reset_done [wIndex] = jiffies
617 + msecs_to_jiffies (20);
620 case USB_PORT_FEAT_C_SUSPEND:
621 clear_bit(wIndex, &ehci->port_c_suspend);
623 case USB_PORT_FEAT_POWER:
624 if (HCS_PPC (ehci->hcs_params))
626 temp & ~(PORT_RWC_BITS | PORT_POWER),
629 case USB_PORT_FEAT_C_CONNECTION:
630 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
633 case USB_PORT_FEAT_C_OVER_CURRENT:
634 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
637 case USB_PORT_FEAT_C_RESET:
638 /* GetPortStatus clears reset */
643 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
645 case GetHubDescriptor:
646 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
650 /* no hub-wide feature/status flags */
652 //cpu_to_le32s ((u32 *) buf);
655 if (!wIndex || wIndex > ports)
659 temp = ehci_readl(ehci, status_reg);
663 status |= 1 << USB_PORT_FEAT_C_CONNECTION;
665 status |= 1 << USB_PORT_FEAT_C_ENABLE;
667 if ((temp & PORT_OCC) && !ignore_oc){
668 status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
671 * Hubs should disable port power on over-current.
672 * However, not all EHCI implementations do this
673 * automatically, even if they _do_ support per-port
674 * power switching; they're allowed to just limit the
675 * current. khubd will turn the power back on.
677 if (HCS_PPC (ehci->hcs_params)){
679 temp & ~(PORT_RWC_BITS | PORT_POWER),
684 /* whoever resumes must GetPortStatus to complete it!! */
685 if (temp & PORT_RESUME) {
687 /* Remote Wakeup received? */
688 if (!ehci->reset_done[wIndex]) {
689 /* resume signaling for 20 msec */
690 ehci->reset_done[wIndex] = jiffies
691 + msecs_to_jiffies(20);
692 /* check the port again */
693 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
694 ehci->reset_done[wIndex]);
697 /* resume completed? */
698 else if (time_after_eq(jiffies,
699 ehci->reset_done[wIndex])) {
700 clear_bit(wIndex, &ehci->suspended_ports);
701 set_bit(wIndex, &ehci->port_c_suspend);
702 ehci->reset_done[wIndex] = 0;
704 /* stop resume signaling */
705 temp = ehci_readl(ehci, status_reg);
707 temp & ~(PORT_RWC_BITS | PORT_RESUME),
709 retval = handshake(ehci, status_reg,
710 PORT_RESUME, 0, 2000 /* 2msec */);
713 "port %d resume error %d\n",
717 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
721 /* whoever resets must GetPortStatus to complete it!! */
722 if ((temp & PORT_RESET)
723 && time_after_eq(jiffies,
724 ehci->reset_done[wIndex])) {
725 status |= 1 << USB_PORT_FEAT_C_RESET;
726 ehci->reset_done [wIndex] = 0;
728 /* force reset to complete */
729 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
731 /* REVISIT: some hardware needs 550+ usec to clear
732 * this bit; seems too long to spin routinely...
734 retval = handshake(ehci, status_reg,
737 ehci_err (ehci, "port %d reset error %d\n",
742 /* see what we found out */
743 temp = check_reset_complete (ehci, wIndex, status_reg,
744 ehci_readl(ehci, status_reg));
747 if (!(temp & (PORT_RESUME|PORT_RESET)))
748 ehci->reset_done[wIndex] = 0;
750 /* transfer dedicated ports to the companion hc */
751 if ((temp & PORT_CONNECT) &&
752 test_bit(wIndex, &ehci->companion_ports)) {
753 temp &= ~PORT_RWC_BITS;
755 ehci_writel(ehci, temp, status_reg);
756 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
757 temp = ehci_readl(ehci, status_reg);
761 * Even if OWNER is set, there's no harm letting khubd
762 * see the wPortStatus values (they should all be 0 except
763 * for PORT_POWER anyway).
766 if (temp & PORT_CONNECT) {
767 status |= 1 << USB_PORT_FEAT_CONNECTION;
768 // status may be from integrated TT
769 status |= ehci_port_speed(ehci, temp);
772 status |= 1 << USB_PORT_FEAT_ENABLE;
774 /* maybe the port was unsuspended without our knowledge */
775 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
776 status |= 1 << USB_PORT_FEAT_SUSPEND;
777 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
778 clear_bit(wIndex, &ehci->suspended_ports);
779 ehci->reset_done[wIndex] = 0;
781 set_bit(wIndex, &ehci->port_c_suspend);
785 status |= 1 << USB_PORT_FEAT_OVER_CURRENT;
786 if (temp & PORT_RESET)
787 status |= 1 << USB_PORT_FEAT_RESET;
788 if (temp & PORT_POWER)
789 status |= 1 << USB_PORT_FEAT_POWER;
790 if (test_bit(wIndex, &ehci->port_c_suspend))
791 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
793 #ifndef VERBOSE_DEBUG
794 if (status & ~0xffff) /* only if wPortChange is interesting */
796 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
797 put_unaligned_le32(status, buf);
801 case C_HUB_LOCAL_POWER:
802 case C_HUB_OVER_CURRENT:
803 /* no hub-wide feature/status flags */
810 selector = wIndex >> 8;
812 if (!wIndex || wIndex > ports)
815 temp = ehci_readl(ehci, status_reg);
816 if (temp & PORT_OWNER)
819 temp &= ~PORT_RWC_BITS;
821 case USB_PORT_FEAT_SUSPEND:
822 if (ehci->no_selective_suspend)
824 if ((temp & PORT_PE) == 0
825 || (temp & PORT_RESET) != 0)
827 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
828 set_bit(wIndex, &ehci->suspended_ports);
830 case USB_PORT_FEAT_POWER:
831 if (HCS_PPC (ehci->hcs_params))
832 ehci_writel(ehci, temp | PORT_POWER,
835 case USB_PORT_FEAT_RESET:
836 if (temp & PORT_RESUME)
838 /* line status bits may report this as low speed,
839 * which can be fine if this root hub has a
840 * transaction translator built in.
842 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
843 && !ehci_is_TDI(ehci)
844 && PORT_USB11 (temp)) {
846 "port %d low speed --> companion\n",
850 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
855 * caller must wait, then call GetPortStatus
856 * usb 2.0 spec says 50 ms resets on root
858 ehci->reset_done [wIndex] = jiffies
859 + msecs_to_jiffies (50);
861 ehci_writel(ehci, temp, status_reg);
864 /* For downstream facing ports (these): one hub port is put
865 * into test mode according to USB2 11.24.2.13, then the hub
866 * must be reset (which for root hub now means rmmod+modprobe,
867 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
868 * about the EHCI-specific stuff.
870 case USB_PORT_FEAT_TEST:
871 if (!selector || selector > 5)
875 temp |= selector << 16;
876 ehci_writel(ehci, temp, status_reg);
882 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
887 /* "stall" on error */
890 spin_unlock_irqrestore (&ehci->lock, flags);
894 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
896 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
898 if (ehci_is_TDI(ehci))
900 set_owner(ehci, --portnum, PORT_OWNER);
903 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
905 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
908 if (ehci_is_TDI(ehci))
910 reg = &ehci->regs->port_status[portnum - 1];
911 return ehci_readl(ehci, reg) & PORT_OWNER;