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);
616 /* If a resume is in progress, make sure it can finish */
617 if (ehci->resuming_ports)
618 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
620 spin_unlock_irqrestore (&ehci->lock, flags);
621 return status ? retval : 0;
624 /*-------------------------------------------------------------------------*/
627 ehci_hub_descriptor (
628 struct ehci_hcd *ehci,
629 struct usb_hub_descriptor *desc
631 int ports = HCS_N_PORTS (ehci->hcs_params);
634 desc->bDescriptorType = 0x29;
635 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
636 desc->bHubContrCurrent = 0;
638 desc->bNbrPorts = ports;
639 temp = 1 + (ports / 8);
640 desc->bDescLength = 7 + 2 * temp;
642 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
643 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
644 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
646 temp = 0x0008; /* per-port overcurrent reporting */
647 if (HCS_PPC (ehci->hcs_params))
648 temp |= 0x0001; /* per-port power control */
650 temp |= 0x0002; /* no power switching */
652 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
653 if (HCS_INDICATOR (ehci->hcs_params))
654 temp |= 0x0080; /* per-port indicators (LEDs) */
656 desc->wHubCharacteristics = cpu_to_le16(temp);
659 /*-------------------------------------------------------------------------*/
661 static int ehci_hub_control (
669 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
670 int ports = HCS_N_PORTS (ehci->hcs_params);
671 u32 __iomem *status_reg = &ehci->regs->port_status[
672 (wIndex & 0xff) - 1];
673 u32 __iomem *hostpc_reg = NULL;
674 u32 temp, temp1, status;
680 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
681 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
682 * (track current state ourselves) ... blink for diagnostics,
683 * power, "this is the one", etc. EHCI spec supports this.
686 if (ehci->has_hostpc)
687 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
688 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
689 spin_lock_irqsave (&ehci->lock, flags);
691 case ClearHubFeature:
693 case C_HUB_LOCAL_POWER:
694 case C_HUB_OVER_CURRENT:
695 /* no hub-wide feature/status flags */
701 case ClearPortFeature:
702 if (!wIndex || wIndex > ports)
705 temp = ehci_readl(ehci, status_reg);
708 * Even if OWNER is set, so the port is owned by the
709 * companion controller, khubd needs to be able to clear
710 * the port-change status bits (especially
711 * USB_PORT_STAT_C_CONNECTION).
715 case USB_PORT_FEAT_ENABLE:
716 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
718 case USB_PORT_FEAT_C_ENABLE:
719 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
722 case USB_PORT_FEAT_SUSPEND:
723 if (temp & PORT_RESET)
725 if (ehci->no_selective_suspend)
727 #ifdef CONFIG_USB_OTG
728 if ((hcd->self.otg_port == (wIndex + 1))
729 && hcd->self.b_hnp_enable) {
730 otg_start_hnp(ehci->transceiver->otg);
734 if (!(temp & PORT_SUSPEND))
736 if ((temp & PORT_PE) == 0)
739 /* clear phy low-power mode before resume */
741 temp1 = ehci_readl(ehci, hostpc_reg);
742 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
744 spin_unlock_irqrestore(&ehci->lock, flags);
745 msleep(5);/* wait to leave low-power mode */
746 spin_lock_irqsave(&ehci->lock, flags);
748 /* resume signaling for 20 msec */
749 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
750 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
751 ehci->reset_done[wIndex] = jiffies
752 + msecs_to_jiffies(20);
754 case USB_PORT_FEAT_C_SUSPEND:
755 clear_bit(wIndex, &ehci->port_c_suspend);
757 case USB_PORT_FEAT_POWER:
758 if (HCS_PPC (ehci->hcs_params))
760 temp & ~(PORT_RWC_BITS | PORT_POWER),
763 case USB_PORT_FEAT_C_CONNECTION:
765 /* clear PORTSC bits on disconnect */
767 temp &= ~PORT_DEV_ADDR;
769 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
772 case USB_PORT_FEAT_C_OVER_CURRENT:
773 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
776 case USB_PORT_FEAT_C_RESET:
777 /* GetPortStatus clears reset */
782 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
784 case GetHubDescriptor:
785 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
789 /* no hub-wide feature/status flags */
791 //cpu_to_le32s ((u32 *) buf);
794 if (!wIndex || wIndex > ports)
798 temp = ehci_readl(ehci, status_reg);
802 status |= USB_PORT_STAT_C_CONNECTION << 16;
804 status |= USB_PORT_STAT_C_ENABLE << 16;
806 if ((temp & PORT_OCC) && !ignore_oc){
807 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
810 * Hubs should disable port power on over-current.
811 * However, not all EHCI implementations do this
812 * automatically, even if they _do_ support per-port
813 * power switching; they're allowed to just limit the
814 * current. khubd will turn the power back on.
816 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
818 temp & ~(PORT_RWC_BITS | PORT_POWER),
820 temp = ehci_readl(ehci, status_reg);
824 /* whoever resumes must GetPortStatus to complete it!! */
825 if (temp & PORT_RESUME) {
827 /* Remote Wakeup received? */
828 if (!ehci->reset_done[wIndex]) {
829 /* resume signaling for 20 msec */
830 ehci->reset_done[wIndex] = jiffies
831 + msecs_to_jiffies(20);
832 /* check the port again */
833 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
834 ehci->reset_done[wIndex]);
837 /* resume completed? */
838 else if (time_after_eq(jiffies,
839 ehci->reset_done[wIndex])) {
840 clear_bit(wIndex, &ehci->suspended_ports);
841 set_bit(wIndex, &ehci->port_c_suspend);
842 ehci->reset_done[wIndex] = 0;
844 /* stop resume signaling */
845 temp = ehci_readl(ehci, status_reg);
847 temp & ~(PORT_RWC_BITS | PORT_RESUME),
849 clear_bit(wIndex, &ehci->resuming_ports);
850 retval = handshake(ehci, status_reg,
851 PORT_RESUME, 0, 2000 /* 2msec */);
854 "port %d resume error %d\n",
858 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
862 /* whoever resets must GetPortStatus to complete it!! */
863 if ((temp & PORT_RESET)
864 && time_after_eq(jiffies,
865 ehci->reset_done[wIndex])) {
866 status |= USB_PORT_STAT_C_RESET << 16;
867 ehci->reset_done [wIndex] = 0;
868 clear_bit(wIndex, &ehci->resuming_ports);
870 /* force reset to complete */
871 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
873 /* REVISIT: some hardware needs 550+ usec to clear
874 * this bit; seems too long to spin routinely...
876 retval = handshake(ehci, status_reg,
877 PORT_RESET, 0, 1000);
879 ehci_err (ehci, "port %d reset error %d\n",
884 /* see what we found out */
885 temp = check_reset_complete (ehci, wIndex, status_reg,
886 ehci_readl(ehci, status_reg));
889 if (!(temp & (PORT_RESUME|PORT_RESET))) {
890 ehci->reset_done[wIndex] = 0;
891 clear_bit(wIndex, &ehci->resuming_ports);
894 /* transfer dedicated ports to the companion hc */
895 if ((temp & PORT_CONNECT) &&
896 test_bit(wIndex, &ehci->companion_ports)) {
897 temp &= ~PORT_RWC_BITS;
899 ehci_writel(ehci, temp, status_reg);
900 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
901 temp = ehci_readl(ehci, status_reg);
905 * Even if OWNER is set, there's no harm letting khubd
906 * see the wPortStatus values (they should all be 0 except
907 * for PORT_POWER anyway).
910 if (temp & PORT_CONNECT) {
911 status |= USB_PORT_STAT_CONNECTION;
912 // status may be from integrated TT
913 if (ehci->has_hostpc) {
914 temp1 = ehci_readl(ehci, hostpc_reg);
915 status |= ehci_port_speed(ehci, temp1);
917 status |= ehci_port_speed(ehci, temp);
920 status |= USB_PORT_STAT_ENABLE;
922 /* maybe the port was unsuspended without our knowledge */
923 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
924 status |= USB_PORT_STAT_SUSPEND;
925 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
926 clear_bit(wIndex, &ehci->suspended_ports);
927 clear_bit(wIndex, &ehci->resuming_ports);
928 ehci->reset_done[wIndex] = 0;
930 set_bit(wIndex, &ehci->port_c_suspend);
934 status |= USB_PORT_STAT_OVERCURRENT;
935 if (temp & PORT_RESET)
936 status |= USB_PORT_STAT_RESET;
937 if (temp & PORT_POWER)
938 status |= USB_PORT_STAT_POWER;
939 if (test_bit(wIndex, &ehci->port_c_suspend))
940 status |= USB_PORT_STAT_C_SUSPEND << 16;
942 #ifndef VERBOSE_DEBUG
943 if (status & ~0xffff) /* only if wPortChange is interesting */
945 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
946 put_unaligned_le32(status, buf);
950 case C_HUB_LOCAL_POWER:
951 case C_HUB_OVER_CURRENT:
952 /* no hub-wide feature/status flags */
959 selector = wIndex >> 8;
961 if (unlikely(ehci->debug)) {
962 /* If the debug port is active any port
963 * feature requests should get denied */
964 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
965 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
970 if (!wIndex || wIndex > ports)
974 /* test if the port is configured to be ignored */
975 if (ehci->port_used_bitmap &&
976 !(ehci->port_used_bitmap & (1 << wIndex)))
979 temp = ehci_readl(ehci, status_reg);
980 if (temp & PORT_OWNER)
983 temp &= ~PORT_RWC_BITS;
985 case USB_PORT_FEAT_SUSPEND:
986 if (ehci->no_selective_suspend)
988 if ((temp & PORT_PE) == 0
989 || (temp & PORT_RESET) != 0)
992 /* After above check the port must be connected.
993 * Set appropriate bit thus could put phy into low power
994 * mode if we have hostpc feature
996 temp &= ~PORT_WKCONN_E;
997 temp |= PORT_WKDISC_E | PORT_WKOC_E;
998 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1000 spin_unlock_irqrestore(&ehci->lock, flags);
1001 msleep(5);/* 5ms for HCD enter low pwr mode */
1002 spin_lock_irqsave(&ehci->lock, flags);
1003 temp1 = ehci_readl(ehci, hostpc_reg);
1004 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1006 temp1 = ehci_readl(ehci, hostpc_reg);
1007 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1008 wIndex, (temp1 & HOSTPC_PHCD) ?
1009 "succeeded" : "failed");
1011 set_bit(wIndex, &ehci->suspended_ports);
1013 case USB_PORT_FEAT_POWER:
1014 if (HCS_PPC (ehci->hcs_params))
1015 ehci_writel(ehci, temp | PORT_POWER,
1018 case USB_PORT_FEAT_RESET:
1019 if (temp & PORT_RESUME)
1021 /* line status bits may report this as low speed,
1022 * which can be fine if this root hub has a
1023 * transaction translator built in.
1025 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1026 && !ehci_is_TDI(ehci)
1027 && PORT_USB11 (temp)) {
1029 "port %d low speed --> companion\n",
1033 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1038 * caller must wait, then call GetPortStatus
1039 * usb 2.0 spec says 50 ms resets on root
1041 ehci->reset_done [wIndex] = jiffies
1042 + msecs_to_jiffies (50);
1044 ehci_writel(ehci, temp, status_reg);
1047 /* For downstream facing ports (these): one hub port is put
1048 * into test mode according to USB2 11.24.2.13, then the hub
1049 * must be reset (which for root hub now means rmmod+modprobe,
1050 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1051 * about the EHCI-specific stuff.
1053 case USB_PORT_FEAT_TEST:
1054 if (!selector || selector > 5)
1058 /* Put all enabled ports into suspend */
1061 &ehci->regs->port_status[ports];
1063 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1065 ehci_writel(ehci, temp | PORT_SUSPEND,
1069 temp = ehci_readl(ehci, status_reg);
1070 temp |= selector << 16;
1071 ehci_writel(ehci, temp, status_reg);
1077 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1082 /* "stall" on error */
1086 spin_unlock_irqrestore (&ehci->lock, flags);
1090 static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
1093 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1095 if (ehci_is_TDI(ehci))
1097 set_owner(ehci, --portnum, PORT_OWNER);
1100 static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
1103 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1106 if (ehci_is_TDI(ehci))
1108 reg = &ehci->regs->port_status[portnum - 1];
1109 return ehci_readl(ehci, reg) & PORT_OWNER;