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 /*-------------------------------------------------------------------------*/
30 #include <linux/usb/otg.h>
32 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
36 static int ehci_hub_control(
45 /* After a power loss, ports that were owned by the companion must be
46 * reset so that the companion can still own them.
48 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
54 struct usb_hcd *hcd = ehci_to_hcd(ehci);
56 if (!ehci->owned_ports)
59 /* Give the connections some time to appear */
62 port = HCS_N_PORTS(ehci->hcs_params);
64 if (test_bit(port, &ehci->owned_ports)) {
65 reg = &ehci->regs->port_status[port];
66 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
68 /* Port already owned by companion? */
69 if (status & PORT_OWNER)
70 clear_bit(port, &ehci->owned_ports);
71 else if (test_bit(port, &ehci->companion_ports))
72 ehci_writel(ehci, status & ~PORT_PE, reg);
74 ehci_hub_control(hcd, SetPortFeature,
75 USB_PORT_FEAT_RESET, port + 1,
80 if (!ehci->owned_ports)
82 msleep(90); /* Wait for resets to complete */
84 port = HCS_N_PORTS(ehci->hcs_params);
86 if (test_bit(port, &ehci->owned_ports)) {
87 ehci_hub_control(hcd, GetPortStatus,
89 (char *) &buf, sizeof(buf));
91 /* The companion should now own the port,
92 * but if something went wrong the port must not
95 reg = &ehci->regs->port_status[port];
96 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
97 if (status & PORT_OWNER)
98 ehci_writel(ehci, status | PORT_CSC, reg);
100 ehci_dbg(ehci, "failed handover port %d: %x\n",
102 ehci_writel(ehci, status & ~PORT_PE, reg);
107 ehci->owned_ports = 0;
110 static int __maybe_unused ehci_port_change(struct ehci_hcd *ehci)
112 int i = HCS_N_PORTS(ehci->hcs_params);
114 /* First check if the controller indicates a change event */
116 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
120 * Not all controllers appear to update this while going from D3 to D0,
121 * so check the individual port status registers as well
125 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
131 static __maybe_unused void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
132 bool suspending, bool do_wakeup)
138 /* If remote wakeup is enabled for the root hub but disabled
139 * for the controller, we must adjust all the port wakeup flags
140 * when the controller is suspended or resumed. In all other
141 * cases they don't need to be changed.
143 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
146 spin_lock_irqsave(&ehci->lock, flags);
148 /* clear phy low-power mode before changing wakeup flags */
149 if (ehci->has_hostpc) {
150 port = HCS_N_PORTS(ehci->hcs_params);
152 u32 __iomem *hostpc_reg;
154 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
155 + HOSTPC0 + 4 * port);
156 temp = ehci_readl(ehci, hostpc_reg);
157 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
159 spin_unlock_irqrestore(&ehci->lock, flags);
161 spin_lock_irqsave(&ehci->lock, flags);
164 port = HCS_N_PORTS(ehci->hcs_params);
166 u32 __iomem *reg = &ehci->regs->port_status[port];
167 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
168 u32 t2 = t1 & ~PORT_WAKE_BITS;
170 /* If we are suspending the controller, clear the flags.
171 * If we are resuming the controller, set the wakeup flags.
174 if (t1 & PORT_CONNECT)
175 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
177 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
179 ehci_vdbg(ehci, "port %d, %08x -> %08x\n",
181 ehci_writel(ehci, t2, reg);
184 /* enter phy low-power mode again */
185 if (ehci->has_hostpc) {
186 port = HCS_N_PORTS(ehci->hcs_params);
188 u32 __iomem *hostpc_reg;
190 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
191 + HOSTPC0 + 4 * port);
192 temp = ehci_readl(ehci, hostpc_reg);
193 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
197 /* Does the root hub have a port wakeup pending? */
198 if (!suspending && ehci_port_change(ehci))
199 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
201 spin_unlock_irqrestore(&ehci->lock, flags);
204 static int ehci_bus_suspend (struct usb_hcd *hcd)
206 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
211 ehci_dbg(ehci, "suspend root hub\n");
213 if (time_before (jiffies, ehci->next_statechange))
215 del_timer_sync(&ehci->watchdog);
216 del_timer_sync(&ehci->iaa_watchdog);
218 spin_lock_irq (&ehci->lock);
220 /* Once the controller is stopped, port resumes that are already
221 * in progress won't complete. Hence if remote wakeup is enabled
222 * for the root hub and any ports are in the middle of a resume or
223 * remote wakeup, we must fail the suspend.
225 if (hcd->self.root_hub->do_remote_wakeup) {
226 if (ehci->resuming_ports) {
227 spin_unlock_irq(&ehci->lock);
228 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
233 /* stop schedules, clean any completed work */
234 if (ehci->rh_state == EHCI_RH_RUNNING)
236 ehci->command = ehci_readl(ehci, &ehci->regs->command);
239 /* Unlike other USB host controller types, EHCI doesn't have
240 * any notion of "global" or bus-wide suspend. The driver has
241 * to manually suspend all the active unsuspended ports, and
242 * then manually resume them in the bus_resume() routine.
244 ehci->bus_suspended = 0;
245 ehci->owned_ports = 0;
247 port = HCS_N_PORTS(ehci->hcs_params);
249 u32 __iomem *reg = &ehci->regs->port_status [port];
250 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
251 u32 t2 = t1 & ~PORT_WAKE_BITS;
253 /* keep track of which ports we suspend */
255 set_bit(port, &ehci->owned_ports);
256 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
258 set_bit(port, &ehci->bus_suspended);
261 /* enable remote wakeup on all ports, if told to do so */
262 if (hcd->self.root_hub->do_remote_wakeup) {
263 /* only enable appropriate wake bits, otherwise the
264 * hardware can not go phy low power mode. If a race
265 * condition happens here(connection change during bits
266 * set), the port change detection will finally fix it.
268 if (t1 & PORT_CONNECT)
269 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
271 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
275 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
277 ehci_writel(ehci, t2, reg);
282 if (changed && ehci->has_hostpc) {
283 spin_unlock_irq(&ehci->lock);
284 msleep(5); /* 5 ms for HCD to enter low-power mode */
285 spin_lock_irq(&ehci->lock);
287 port = HCS_N_PORTS(ehci->hcs_params);
289 u32 __iomem *hostpc_reg;
292 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
293 + HOSTPC0 + 4 * port);
294 t3 = ehci_readl(ehci, hostpc_reg);
295 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
296 t3 = ehci_readl(ehci, hostpc_reg);
297 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
298 port, (t3 & HOSTPC_PHCD) ?
299 "succeeded" : "failed");
303 /* Apparently some devices need a >= 1-uframe delay here */
304 if (ehci->bus_suspended)
307 /* turn off now-idle HC */
309 ehci->rh_state = EHCI_RH_SUSPENDED;
312 end_unlink_async(ehci);
314 /* allow remote wakeup */
316 if (!hcd->self.root_hub->do_remote_wakeup)
318 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
319 ehci_readl(ehci, &ehci->regs->intr_enable);
321 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
322 spin_unlock_irq (&ehci->lock);
324 /* ehci_work() may have re-enabled the watchdog timer, which we do not
325 * want, and so we must delete any pending watchdog timer events.
327 del_timer_sync(&ehci->watchdog);
332 /* caller has locked the root hub, and should reset/reinit on error */
333 static int ehci_bus_resume (struct usb_hcd *hcd)
335 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
339 unsigned long resume_needed = 0;
341 if (time_before (jiffies, ehci->next_statechange))
343 spin_lock_irq (&ehci->lock);
344 if (!HCD_HW_ACCESSIBLE(hcd)) {
345 spin_unlock_irq(&ehci->lock);
349 if (unlikely(ehci->debug)) {
350 if (!dbgp_reset_prep())
353 dbgp_external_startup();
356 /* Ideally and we've got a real resume here, and no port's power
357 * was lost. (For PCI, that means Vaux was maintained.) But we
358 * could instead be restoring a swsusp snapshot -- so that BIOS was
359 * the last user of the controller, not reset/pm hardware keeping
360 * state we gave to it.
362 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
363 ehci_dbg(ehci, "resume root hub%s\n",
364 power_okay ? "" : " after power loss");
366 /* at least some APM implementations will try to deliver
367 * IRQs right away, so delay them until we're ready.
369 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
371 /* re-init operational registers */
372 ehci_writel(ehci, 0, &ehci->regs->segment);
373 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
374 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
376 /* restore CMD_RUN, framelist size, and irq threshold */
377 ehci_writel(ehci, ehci->command, &ehci->regs->command);
378 ehci->rh_state = EHCI_RH_RUNNING;
380 /* Some controller/firmware combinations need a delay during which
381 * they set up the port statuses. See Bugzilla #8190. */
382 spin_unlock_irq(&ehci->lock);
384 spin_lock_irq(&ehci->lock);
386 /* clear phy low-power mode before resume */
387 if (ehci->bus_suspended && ehci->has_hostpc) {
388 i = HCS_N_PORTS(ehci->hcs_params);
390 if (test_bit(i, &ehci->bus_suspended)) {
391 u32 __iomem *hostpc_reg;
393 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
395 temp = ehci_readl(ehci, hostpc_reg);
396 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
400 spin_unlock_irq(&ehci->lock);
402 spin_lock_irq(&ehci->lock);
405 /* manually resume the ports we suspended during bus_suspend() */
406 i = HCS_N_PORTS (ehci->hcs_params);
408 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
409 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
410 if (test_bit(i, &ehci->bus_suspended) &&
411 (temp & PORT_SUSPEND)) {
413 set_bit(i, &resume_needed);
415 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
418 /* msleep for 20ms only if code is trying to resume port */
420 spin_unlock_irq(&ehci->lock);
422 spin_lock_irq(&ehci->lock);
425 i = HCS_N_PORTS (ehci->hcs_params);
427 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
428 if (test_bit(i, &resume_needed)) {
429 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
430 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
431 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
434 (void) ehci_readl(ehci, &ehci->regs->command);
436 /* maybe re-activate the schedule(s) */
438 if (ehci->async->qh_next.qh)
440 if (ehci->periodic_sched)
443 ehci->command |= temp;
444 ehci_writel(ehci, ehci->command, &ehci->regs->command);
447 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
449 /* Now we can safely re-enable irqs */
450 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
452 spin_unlock_irq (&ehci->lock);
453 ehci_handover_companion_ports(ehci);
459 #define ehci_bus_suspend NULL
460 #define ehci_bus_resume NULL
462 #endif /* CONFIG_PM */
464 /*-------------------------------------------------------------------------*/
467 * Sets the owner of a port
469 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
471 u32 __iomem *status_reg;
475 status_reg = &ehci->regs->port_status[portnum];
478 * The controller won't set the OWNER bit if the port is
479 * enabled, so this loop will sometimes require at least two
480 * iterations: one to disable the port and one to set OWNER.
482 for (try = 4; try > 0; --try) {
483 spin_lock_irq(&ehci->lock);
484 port_status = ehci_readl(ehci, status_reg);
485 if ((port_status & PORT_OWNER) == new_owner
486 || (port_status & (PORT_OWNER | PORT_CONNECT))
490 port_status ^= PORT_OWNER;
491 port_status &= ~(PORT_PE | PORT_RWC_BITS);
492 ehci_writel(ehci, port_status, status_reg);
494 spin_unlock_irq(&ehci->lock);
500 /*-------------------------------------------------------------------------*/
502 static int check_reset_complete (
503 struct ehci_hcd *ehci,
505 u32 __iomem *status_reg,
508 if (!(port_status & PORT_CONNECT))
511 /* if reset finished and it's still not enabled -- handoff */
512 if (!(port_status & PORT_PE)) {
514 /* with integrated TT, there's nobody to hand it to! */
515 if (ehci_is_TDI(ehci)) {
517 "Failed to enable port %d on root hub TT\n",
522 ehci_dbg (ehci, "port %d full speed --> companion\n",
525 // what happens if HCS_N_CC(params) == 0 ?
526 port_status |= PORT_OWNER;
527 port_status &= ~PORT_RWC_BITS;
528 ehci_writel(ehci, port_status, status_reg);
530 /* ensure 440EPX ohci controller state is operational */
531 if (ehci->has_amcc_usb23)
532 set_ohci_hcfs(ehci, 1);
534 ehci_dbg (ehci, "port %d high speed\n", index + 1);
535 /* ensure 440EPx ohci controller state is suspended */
536 if (ehci->has_amcc_usb23)
537 set_ohci_hcfs(ehci, 0);
543 /*-------------------------------------------------------------------------*/
546 /* build "status change" packet (one or two bytes) from HC registers */
549 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
551 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
554 int ports, i, retval = 1;
558 /* init status to no-changes */
560 ports = HCS_N_PORTS (ehci->hcs_params);
566 /* Inform the core about resumes-in-progress by returning
567 * a non-zero value even if there are no status changes.
569 status = ehci->resuming_ports;
571 /* Some boards (mostly VIA?) report bogus overcurrent indications,
572 * causing massive log spam unless we completely ignore them. It
573 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
574 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
575 * PORT_POWER; that's surprising, but maybe within-spec.
578 mask = PORT_CSC | PORT_PEC | PORT_OCC;
580 mask = PORT_CSC | PORT_PEC;
581 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
583 /* no hub change reports (bit 0) for now (power, ...) */
585 /* port N changes (bit N)? */
586 spin_lock_irqsave (&ehci->lock, flags);
588 /* get per-port change detect bits */
590 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
592 for (i = 0; i < ports; i++) {
593 /* leverage per-port change bits feature */
594 if (ehci->has_ppcd && !(ppcd & (1 << i)))
596 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
599 * Return status information even for ports with OWNER set.
600 * Otherwise khubd wouldn't see the disconnect event when a
601 * high-speed device is switched over to the companion
602 * controller by the user.
605 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
606 || (ehci->reset_done[i] && time_after_eq(
607 jiffies, ehci->reset_done[i]))) {
609 buf [0] |= 1 << (i + 1);
611 buf [1] |= 1 << (i - 7);
615 /* FIXME autosuspend idle root hubs */
616 spin_unlock_irqrestore (&ehci->lock, flags);
617 return status ? retval : 0;
620 /*-------------------------------------------------------------------------*/
623 ehci_hub_descriptor (
624 struct ehci_hcd *ehci,
625 struct usb_hub_descriptor *desc
627 int ports = HCS_N_PORTS (ehci->hcs_params);
630 desc->bDescriptorType = 0x29;
631 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
632 desc->bHubContrCurrent = 0;
634 desc->bNbrPorts = ports;
635 temp = 1 + (ports / 8);
636 desc->bDescLength = 7 + 2 * temp;
638 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
639 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
640 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
642 temp = 0x0008; /* per-port overcurrent reporting */
643 if (HCS_PPC (ehci->hcs_params))
644 temp |= 0x0001; /* per-port power control */
646 temp |= 0x0002; /* no power switching */
648 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
649 if (HCS_INDICATOR (ehci->hcs_params))
650 temp |= 0x0080; /* per-port indicators (LEDs) */
652 desc->wHubCharacteristics = cpu_to_le16(temp);
655 /*-------------------------------------------------------------------------*/
657 static int ehci_hub_control (
665 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
666 int ports = HCS_N_PORTS (ehci->hcs_params);
667 u32 __iomem *status_reg = &ehci->regs->port_status[
668 (wIndex & 0xff) - 1];
669 u32 __iomem *hostpc_reg = NULL;
670 u32 temp, temp1, status;
676 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
677 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
678 * (track current state ourselves) ... blink for diagnostics,
679 * power, "this is the one", etc. EHCI spec supports this.
682 if (ehci->has_hostpc)
683 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
684 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
685 spin_lock_irqsave (&ehci->lock, flags);
687 case ClearHubFeature:
689 case C_HUB_LOCAL_POWER:
690 case C_HUB_OVER_CURRENT:
691 /* no hub-wide feature/status flags */
697 case ClearPortFeature:
698 if (!wIndex || wIndex > ports)
701 temp = ehci_readl(ehci, status_reg);
704 * Even if OWNER is set, so the port is owned by the
705 * companion controller, khubd needs to be able to clear
706 * the port-change status bits (especially
707 * USB_PORT_STAT_C_CONNECTION).
711 case USB_PORT_FEAT_ENABLE:
712 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
714 case USB_PORT_FEAT_C_ENABLE:
715 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
718 case USB_PORT_FEAT_SUSPEND:
719 if (temp & PORT_RESET)
721 if (ehci->no_selective_suspend)
723 #ifdef CONFIG_USB_OTG
724 if ((hcd->self.otg_port == (wIndex + 1))
725 && hcd->self.b_hnp_enable) {
726 otg_start_hnp(ehci->transceiver->otg);
730 if (!(temp & PORT_SUSPEND))
732 if ((temp & PORT_PE) == 0)
735 /* clear phy low-power mode before resume */
737 temp1 = ehci_readl(ehci, hostpc_reg);
738 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
740 spin_unlock_irqrestore(&ehci->lock, flags);
741 msleep(5);/* wait to leave low-power mode */
742 spin_lock_irqsave(&ehci->lock, flags);
744 /* resume signaling for 20 msec */
745 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
746 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
747 ehci->reset_done[wIndex] = jiffies
748 + msecs_to_jiffies(20);
750 case USB_PORT_FEAT_C_SUSPEND:
751 clear_bit(wIndex, &ehci->port_c_suspend);
753 case USB_PORT_FEAT_POWER:
754 if (HCS_PPC (ehci->hcs_params))
756 temp & ~(PORT_RWC_BITS | PORT_POWER),
759 case USB_PORT_FEAT_C_CONNECTION:
761 /* clear PORTSC bits on disconnect */
763 temp &= ~PORT_DEV_ADDR;
765 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
768 case USB_PORT_FEAT_C_OVER_CURRENT:
769 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
772 case USB_PORT_FEAT_C_RESET:
773 /* GetPortStatus clears reset */
778 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
780 case GetHubDescriptor:
781 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
785 /* no hub-wide feature/status flags */
787 //cpu_to_le32s ((u32 *) buf);
790 if (!wIndex || wIndex > ports)
794 temp = ehci_readl(ehci, status_reg);
798 status |= USB_PORT_STAT_C_CONNECTION << 16;
800 status |= USB_PORT_STAT_C_ENABLE << 16;
802 if ((temp & PORT_OCC) && !ignore_oc){
803 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
806 * Hubs should disable port power on over-current.
807 * However, not all EHCI implementations do this
808 * automatically, even if they _do_ support per-port
809 * power switching; they're allowed to just limit the
810 * current. khubd will turn the power back on.
812 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
814 temp & ~(PORT_RWC_BITS | PORT_POWER),
816 temp = ehci_readl(ehci, status_reg);
820 /* whoever resumes must GetPortStatus to complete it!! */
821 if (temp & PORT_RESUME) {
823 /* Remote Wakeup received? */
824 if (!ehci->reset_done[wIndex]) {
825 /* resume signaling for 20 msec */
826 ehci->reset_done[wIndex] = jiffies
827 + msecs_to_jiffies(20);
828 /* check the port again */
829 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
830 ehci->reset_done[wIndex]);
833 /* resume completed? */
834 else if (time_after_eq(jiffies,
835 ehci->reset_done[wIndex])) {
836 clear_bit(wIndex, &ehci->suspended_ports);
837 set_bit(wIndex, &ehci->port_c_suspend);
838 ehci->reset_done[wIndex] = 0;
840 /* stop resume signaling */
841 temp = ehci_readl(ehci, status_reg);
843 temp & ~(PORT_RWC_BITS | PORT_RESUME),
845 clear_bit(wIndex, &ehci->resuming_ports);
846 retval = handshake(ehci, status_reg,
847 PORT_RESUME, 0, 2000 /* 2msec */);
850 "port %d resume error %d\n",
854 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
858 /* whoever resets must GetPortStatus to complete it!! */
859 if ((temp & PORT_RESET)
860 && time_after_eq(jiffies,
861 ehci->reset_done[wIndex])) {
862 status |= USB_PORT_STAT_C_RESET << 16;
863 ehci->reset_done [wIndex] = 0;
864 clear_bit(wIndex, &ehci->resuming_ports);
866 /* force reset to complete */
867 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
869 /* REVISIT: some hardware needs 550+ usec to clear
870 * this bit; seems too long to spin routinely...
872 retval = handshake(ehci, status_reg,
873 PORT_RESET, 0, 1000);
875 ehci_err (ehci, "port %d reset error %d\n",
880 /* see what we found out */
881 temp = check_reset_complete (ehci, wIndex, status_reg,
882 ehci_readl(ehci, status_reg));
885 if (!(temp & (PORT_RESUME|PORT_RESET))) {
886 ehci->reset_done[wIndex] = 0;
887 clear_bit(wIndex, &ehci->resuming_ports);
890 /* transfer dedicated ports to the companion hc */
891 if ((temp & PORT_CONNECT) &&
892 test_bit(wIndex, &ehci->companion_ports)) {
893 temp &= ~PORT_RWC_BITS;
895 ehci_writel(ehci, temp, status_reg);
896 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
897 temp = ehci_readl(ehci, status_reg);
901 * Even if OWNER is set, there's no harm letting khubd
902 * see the wPortStatus values (they should all be 0 except
903 * for PORT_POWER anyway).
906 if (temp & PORT_CONNECT) {
907 status |= USB_PORT_STAT_CONNECTION;
908 // status may be from integrated TT
909 if (ehci->has_hostpc) {
910 temp1 = ehci_readl(ehci, hostpc_reg);
911 status |= ehci_port_speed(ehci, temp1);
913 status |= ehci_port_speed(ehci, temp);
916 status |= USB_PORT_STAT_ENABLE;
918 /* maybe the port was unsuspended without our knowledge */
919 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
920 status |= USB_PORT_STAT_SUSPEND;
921 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
922 clear_bit(wIndex, &ehci->suspended_ports);
923 clear_bit(wIndex, &ehci->resuming_ports);
924 ehci->reset_done[wIndex] = 0;
926 set_bit(wIndex, &ehci->port_c_suspend);
930 status |= USB_PORT_STAT_OVERCURRENT;
931 if (temp & PORT_RESET)
932 status |= USB_PORT_STAT_RESET;
933 if (temp & PORT_POWER)
934 status |= USB_PORT_STAT_POWER;
935 if (test_bit(wIndex, &ehci->port_c_suspend))
936 status |= USB_PORT_STAT_C_SUSPEND << 16;
938 #ifndef VERBOSE_DEBUG
939 if (status & ~0xffff) /* only if wPortChange is interesting */
941 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
942 put_unaligned_le32(status, buf);
946 case C_HUB_LOCAL_POWER:
947 case C_HUB_OVER_CURRENT:
948 /* no hub-wide feature/status flags */
955 selector = wIndex >> 8;
957 if (unlikely(ehci->debug)) {
958 /* If the debug port is active any port
959 * feature requests should get denied */
960 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
961 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
966 if (!wIndex || wIndex > ports)
969 temp = ehci_readl(ehci, status_reg);
970 if (temp & PORT_OWNER)
973 temp &= ~PORT_RWC_BITS;
975 case USB_PORT_FEAT_SUSPEND:
976 if (ehci->no_selective_suspend)
978 if ((temp & PORT_PE) == 0
979 || (temp & PORT_RESET) != 0)
982 /* After above check the port must be connected.
983 * Set appropriate bit thus could put phy into low power
984 * mode if we have hostpc feature
986 temp &= ~PORT_WKCONN_E;
987 temp |= PORT_WKDISC_E | PORT_WKOC_E;
988 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
990 spin_unlock_irqrestore(&ehci->lock, flags);
991 msleep(5);/* 5ms for HCD enter low pwr mode */
992 spin_lock_irqsave(&ehci->lock, flags);
993 temp1 = ehci_readl(ehci, hostpc_reg);
994 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
996 temp1 = ehci_readl(ehci, hostpc_reg);
997 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
998 wIndex, (temp1 & HOSTPC_PHCD) ?
999 "succeeded" : "failed");
1001 set_bit(wIndex, &ehci->suspended_ports);
1003 case USB_PORT_FEAT_POWER:
1004 if (HCS_PPC (ehci->hcs_params))
1005 ehci_writel(ehci, temp | PORT_POWER,
1008 case USB_PORT_FEAT_RESET:
1009 if (temp & PORT_RESUME)
1011 /* line status bits may report this as low speed,
1012 * which can be fine if this root hub has a
1013 * transaction translator built in.
1015 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1016 && !ehci_is_TDI(ehci)
1017 && PORT_USB11 (temp)) {
1019 "port %d low speed --> companion\n",
1023 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1028 * caller must wait, then call GetPortStatus
1029 * usb 2.0 spec says 50 ms resets on root
1031 ehci->reset_done [wIndex] = jiffies
1032 + msecs_to_jiffies (50);
1034 ehci_writel(ehci, temp, status_reg);
1037 /* For downstream facing ports (these): one hub port is put
1038 * into test mode according to USB2 11.24.2.13, then the hub
1039 * must be reset (which for root hub now means rmmod+modprobe,
1040 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1041 * about the EHCI-specific stuff.
1043 case USB_PORT_FEAT_TEST:
1044 if (!selector || selector > 5)
1048 /* Put all enabled ports into suspend */
1051 &ehci->regs->port_status[ports];
1053 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1055 ehci_writel(ehci, temp | PORT_SUSPEND,
1059 temp = ehci_readl(ehci, status_reg);
1060 temp |= selector << 16;
1061 ehci_writel(ehci, temp, status_reg);
1067 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1072 /* "stall" on error */
1076 spin_unlock_irqrestore (&ehci->lock, flags);
1080 static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
1083 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1085 if (ehci_is_TDI(ehci))
1087 set_owner(ehci, --portnum, PORT_OWNER);
1090 static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
1093 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1096 if (ehci_is_TDI(ehci))
1098 reg = &ehci->regs->port_status[portnum - 1];
1099 return ehci_readl(ehci, reg) & PORT_OWNER;