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 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);
212 ehci_dbg(ehci, "suspend root hub\n");
214 if (time_before (jiffies, ehci->next_statechange))
216 del_timer_sync(&ehci->watchdog);
217 del_timer_sync(&ehci->iaa_watchdog);
219 spin_lock_irq (&ehci->lock);
221 /* Once the controller is stopped, port resumes that are already
222 * in progress won't complete. Hence if remote wakeup is enabled
223 * for the root hub and any ports are in the middle of a resume or
224 * remote wakeup, we must fail the suspend.
226 if (hcd->self.root_hub->do_remote_wakeup) {
227 port = HCS_N_PORTS(ehci->hcs_params);
229 if (ehci->reset_done[port] != 0) {
230 spin_unlock_irq(&ehci->lock);
231 ehci_dbg(ehci, "suspend failed because "
232 "port %d is resuming\n",
239 /* stop schedules, clean any completed work */
240 if (ehci->rh_state == EHCI_RH_RUNNING)
242 ehci->command = ehci_readl(ehci, &ehci->regs->command);
245 /* Unlike other USB host controller types, EHCI doesn't have
246 * any notion of "global" or bus-wide suspend. The driver has
247 * to manually suspend all the active unsuspended ports, and
248 * then manually resume them in the bus_resume() routine.
250 ehci->bus_suspended = 0;
251 ehci->owned_ports = 0;
253 fs_idle_delay = false;
254 port = HCS_N_PORTS(ehci->hcs_params);
256 u32 __iomem *reg = &ehci->regs->port_status [port];
257 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
258 u32 t2 = t1 & ~PORT_WAKE_BITS;
260 /* keep track of which ports we suspend */
262 set_bit(port, &ehci->owned_ports);
263 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
265 set_bit(port, &ehci->bus_suspended);
268 /* enable remote wakeup on all ports, if told to do so */
269 if (hcd->self.root_hub->do_remote_wakeup) {
270 /* only enable appropriate wake bits, otherwise the
271 * hardware can not go phy low power mode. If a race
272 * condition happens here(connection change during bits
273 * set), the port change detection will finally fix it.
275 if (t1 & PORT_CONNECT)
276 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
278 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
282 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
285 * On some controllers, Wake-On-Disconnect will
286 * generate false wakeup signals until the bus
287 * switches over to full-speed idle. For their
288 * sake, add a delay if we need one.
290 if ((t2 & PORT_WKDISC_E) &&
291 ehci_port_speed(ehci, t2) ==
292 USB_PORT_STAT_HIGH_SPEED)
293 fs_idle_delay = true;
294 ehci_writel(ehci, t2, reg);
298 spin_unlock_irq(&ehci->lock);
300 if ((changed && ehci->has_hostpc) || fs_idle_delay) {
302 * Wait for HCD to enter low-power mode or for the bus
303 * to switch to full-speed idle.
305 usleep_range(5000, 5500);
308 spin_lock_irq(&ehci->lock);
310 if (changed && ehci->has_hostpc) {
311 spin_lock_irq(&ehci->lock);
312 port = HCS_N_PORTS(ehci->hcs_params);
314 u32 __iomem *hostpc_reg;
317 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
318 + HOSTPC0 + 4 * port);
319 t3 = ehci_readl(ehci, hostpc_reg);
320 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
321 t3 = ehci_readl(ehci, hostpc_reg);
322 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
323 port, (t3 & HOSTPC_PHCD) ?
324 "succeeded" : "failed");
328 /* Apparently some devices need a >= 1-uframe delay here */
329 if (ehci->bus_suspended)
332 /* turn off now-idle HC */
334 ehci->rh_state = EHCI_RH_SUSPENDED;
337 end_unlink_async(ehci);
339 /* allow remote wakeup */
341 if (!hcd->self.root_hub->do_remote_wakeup)
343 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
344 ehci_readl(ehci, &ehci->regs->intr_enable);
346 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
347 spin_unlock_irq (&ehci->lock);
349 /* ehci_work() may have re-enabled the watchdog timer, which we do not
350 * want, and so we must delete any pending watchdog timer events.
352 del_timer_sync(&ehci->watchdog);
357 /* caller has locked the root hub, and should reset/reinit on error */
358 static int ehci_bus_resume (struct usb_hcd *hcd)
360 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
364 unsigned long resume_needed = 0;
366 if (time_before (jiffies, ehci->next_statechange))
368 spin_lock_irq (&ehci->lock);
369 if (!HCD_HW_ACCESSIBLE(hcd)) {
370 spin_unlock_irq(&ehci->lock);
374 if (unlikely(ehci->debug)) {
375 if (!dbgp_reset_prep())
378 dbgp_external_startup();
381 /* Ideally and we've got a real resume here, and no port's power
382 * was lost. (For PCI, that means Vaux was maintained.) But we
383 * could instead be restoring a swsusp snapshot -- so that BIOS was
384 * the last user of the controller, not reset/pm hardware keeping
385 * state we gave to it.
387 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
388 ehci_dbg(ehci, "resume root hub%s\n",
389 power_okay ? "" : " after power loss");
391 /* at least some APM implementations will try to deliver
392 * IRQs right away, so delay them until we're ready.
394 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
396 /* re-init operational registers */
397 ehci_writel(ehci, 0, &ehci->regs->segment);
398 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
399 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
401 /* restore CMD_RUN, framelist size, and irq threshold */
402 ehci_writel(ehci, ehci->command, &ehci->regs->command);
403 ehci->rh_state = EHCI_RH_RUNNING;
405 /* Some controller/firmware combinations need a delay during which
406 * they set up the port statuses. See Bugzilla #8190. */
407 spin_unlock_irq(&ehci->lock);
409 spin_lock_irq(&ehci->lock);
411 /* clear phy low-power mode before resume */
412 if (ehci->bus_suspended && ehci->has_hostpc) {
413 i = HCS_N_PORTS(ehci->hcs_params);
415 if (test_bit(i, &ehci->bus_suspended)) {
416 u32 __iomem *hostpc_reg;
418 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
420 temp = ehci_readl(ehci, hostpc_reg);
421 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
425 spin_unlock_irq(&ehci->lock);
427 spin_lock_irq(&ehci->lock);
430 /* manually resume the ports we suspended during bus_suspend() */
431 i = HCS_N_PORTS (ehci->hcs_params);
433 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
434 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
435 if (test_bit(i, &ehci->bus_suspended) &&
436 (temp & PORT_SUSPEND)) {
438 set_bit(i, &resume_needed);
440 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
443 /* msleep for 20ms only if code is trying to resume port */
445 spin_unlock_irq(&ehci->lock);
447 spin_lock_irq(&ehci->lock);
450 i = HCS_N_PORTS (ehci->hcs_params);
452 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
453 if (test_bit(i, &resume_needed)) {
454 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
455 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
456 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
459 (void) ehci_readl(ehci, &ehci->regs->command);
461 /* maybe re-activate the schedule(s) */
463 if (ehci->async->qh_next.qh)
465 if (ehci->periodic_sched)
468 ehci->command |= temp;
469 ehci_writel(ehci, ehci->command, &ehci->regs->command);
472 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
474 /* Now we can safely re-enable irqs */
475 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
477 spin_unlock_irq (&ehci->lock);
478 ehci_handover_companion_ports(ehci);
484 #define ehci_bus_suspend NULL
485 #define ehci_bus_resume NULL
487 #endif /* CONFIG_PM */
489 /*-------------------------------------------------------------------------*/
492 * Sets the owner of a port
494 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
496 u32 __iomem *status_reg;
500 status_reg = &ehci->regs->port_status[portnum];
503 * The controller won't set the OWNER bit if the port is
504 * enabled, so this loop will sometimes require at least two
505 * iterations: one to disable the port and one to set OWNER.
507 for (try = 4; try > 0; --try) {
508 spin_lock_irq(&ehci->lock);
509 port_status = ehci_readl(ehci, status_reg);
510 if ((port_status & PORT_OWNER) == new_owner
511 || (port_status & (PORT_OWNER | PORT_CONNECT))
515 port_status ^= PORT_OWNER;
516 port_status &= ~(PORT_PE | PORT_RWC_BITS);
517 ehci_writel(ehci, port_status, status_reg);
519 spin_unlock_irq(&ehci->lock);
525 /*-------------------------------------------------------------------------*/
527 static int check_reset_complete (
528 struct ehci_hcd *ehci,
530 u32 __iomem *status_reg,
533 if (!(port_status & PORT_CONNECT))
536 /* if reset finished and it's still not enabled -- handoff */
537 if (!(port_status & PORT_PE)) {
539 /* with integrated TT, there's nobody to hand it to! */
540 if (ehci_is_TDI(ehci)) {
542 "Failed to enable port %d on root hub TT\n",
547 ehci_dbg (ehci, "port %d full speed --> companion\n",
550 // what happens if HCS_N_CC(params) == 0 ?
551 port_status |= PORT_OWNER;
552 port_status &= ~PORT_RWC_BITS;
553 ehci_writel(ehci, port_status, status_reg);
555 /* ensure 440EPX ohci controller state is operational */
556 if (ehci->has_amcc_usb23)
557 set_ohci_hcfs(ehci, 1);
559 ehci_dbg (ehci, "port %d high speed\n", index + 1);
560 /* ensure 440EPx ohci controller state is suspended */
561 if (ehci->has_amcc_usb23)
562 set_ohci_hcfs(ehci, 0);
568 /*-------------------------------------------------------------------------*/
571 /* build "status change" packet (one or two bytes) from HC registers */
574 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
576 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
577 u32 temp, status = 0;
579 int ports, i, retval = 1;
583 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
584 if (ehci->rh_state != EHCI_RH_RUNNING)
587 /* init status to no-changes */
589 ports = HCS_N_PORTS (ehci->hcs_params);
595 /* Some boards (mostly VIA?) report bogus overcurrent indications,
596 * causing massive log spam unless we completely ignore them. It
597 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
598 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
599 * PORT_POWER; that's surprising, but maybe within-spec.
602 mask = PORT_CSC | PORT_PEC | PORT_OCC;
604 mask = PORT_CSC | PORT_PEC;
605 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
607 /* no hub change reports (bit 0) for now (power, ...) */
609 /* port N changes (bit N)? */
610 spin_lock_irqsave (&ehci->lock, flags);
612 /* get per-port change detect bits */
614 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
616 for (i = 0; i < ports; i++) {
617 /* leverage per-port change bits feature */
618 if (ehci->has_ppcd && !(ppcd & (1 << i)))
620 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
623 * Return status information even for ports with OWNER set.
624 * Otherwise khubd wouldn't see the disconnect event when a
625 * high-speed device is switched over to the companion
626 * controller by the user.
629 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
630 || (ehci->reset_done[i] && time_after_eq(
631 jiffies, ehci->reset_done[i]))) {
633 buf [0] |= 1 << (i + 1);
635 buf [1] |= 1 << (i - 7);
639 /* FIXME autosuspend idle root hubs */
640 spin_unlock_irqrestore (&ehci->lock, flags);
641 return status ? retval : 0;
644 /*-------------------------------------------------------------------------*/
647 ehci_hub_descriptor (
648 struct ehci_hcd *ehci,
649 struct usb_hub_descriptor *desc
651 int ports = HCS_N_PORTS (ehci->hcs_params);
654 desc->bDescriptorType = 0x29;
655 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
656 desc->bHubContrCurrent = 0;
658 desc->bNbrPorts = ports;
659 temp = 1 + (ports / 8);
660 desc->bDescLength = 7 + 2 * temp;
662 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
663 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
664 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
666 temp = 0x0008; /* per-port overcurrent reporting */
667 if (HCS_PPC (ehci->hcs_params))
668 temp |= 0x0001; /* per-port power control */
670 temp |= 0x0002; /* no power switching */
672 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
673 if (HCS_INDICATOR (ehci->hcs_params))
674 temp |= 0x0080; /* per-port indicators (LEDs) */
676 desc->wHubCharacteristics = cpu_to_le16(temp);
679 /*-------------------------------------------------------------------------*/
681 static int ehci_hub_control (
689 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
690 int ports = HCS_N_PORTS (ehci->hcs_params);
691 u32 __iomem *status_reg = &ehci->regs->port_status[
692 (wIndex & 0xff) - 1];
693 u32 __iomem *hostpc_reg = NULL;
694 u32 temp, temp1, status;
700 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
701 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
702 * (track current state ourselves) ... blink for diagnostics,
703 * power, "this is the one", etc. EHCI spec supports this.
706 if (ehci->has_hostpc)
707 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
708 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
709 spin_lock_irqsave (&ehci->lock, flags);
711 case ClearHubFeature:
713 case C_HUB_LOCAL_POWER:
714 case C_HUB_OVER_CURRENT:
715 /* no hub-wide feature/status flags */
721 case ClearPortFeature:
722 if (!wIndex || wIndex > ports)
725 temp = ehci_readl(ehci, status_reg);
728 * Even if OWNER is set, so the port is owned by the
729 * companion controller, khubd needs to be able to clear
730 * the port-change status bits (especially
731 * USB_PORT_STAT_C_CONNECTION).
735 case USB_PORT_FEAT_ENABLE:
736 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
738 case USB_PORT_FEAT_C_ENABLE:
739 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
742 case USB_PORT_FEAT_SUSPEND:
743 if (temp & PORT_RESET)
745 if (ehci->no_selective_suspend)
747 #ifdef CONFIG_USB_OTG
748 if ((hcd->self.otg_port == (wIndex + 1))
749 && hcd->self.b_hnp_enable) {
750 otg_start_hnp(ehci->transceiver);
754 if (!(temp & PORT_SUSPEND))
756 if ((temp & PORT_PE) == 0)
759 /* clear phy low-power mode before resume */
761 temp1 = ehci_readl(ehci, hostpc_reg);
762 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
764 spin_unlock_irqrestore(&ehci->lock, flags);
765 msleep(5);/* wait to leave low-power mode */
766 spin_lock_irqsave(&ehci->lock, flags);
768 /* resume signaling for 20 msec */
769 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
770 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
771 ehci->reset_done[wIndex] = jiffies
772 + msecs_to_jiffies(20);
774 case USB_PORT_FEAT_C_SUSPEND:
775 clear_bit(wIndex, &ehci->port_c_suspend);
777 case USB_PORT_FEAT_POWER:
778 if (HCS_PPC (ehci->hcs_params))
780 temp & ~(PORT_RWC_BITS | PORT_POWER),
783 case USB_PORT_FEAT_C_CONNECTION:
785 /* clear PORTSC bits on disconnect */
787 temp &= ~PORT_DEV_ADDR;
789 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
792 case USB_PORT_FEAT_C_OVER_CURRENT:
793 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
796 case USB_PORT_FEAT_C_RESET:
797 /* GetPortStatus clears reset */
802 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
804 case GetHubDescriptor:
805 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
809 /* no hub-wide feature/status flags */
811 //cpu_to_le32s ((u32 *) buf);
814 if (!wIndex || wIndex > ports)
818 temp = ehci_readl(ehci, status_reg);
822 status |= USB_PORT_STAT_C_CONNECTION << 16;
824 status |= USB_PORT_STAT_C_ENABLE << 16;
826 if ((temp & PORT_OCC) && !ignore_oc){
827 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
830 * Hubs should disable port power on over-current.
831 * However, not all EHCI implementations do this
832 * automatically, even if they _do_ support per-port
833 * power switching; they're allowed to just limit the
834 * current. khubd will turn the power back on.
836 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
838 temp & ~(PORT_RWC_BITS | PORT_POWER),
840 temp = ehci_readl(ehci, status_reg);
844 /* whoever resumes must GetPortStatus to complete it!! */
845 if (temp & PORT_RESUME) {
847 /* Remote Wakeup received? */
848 if (!ehci->reset_done[wIndex]) {
849 /* resume signaling for 20 msec */
850 ehci->reset_done[wIndex] = jiffies
851 + msecs_to_jiffies(20);
852 /* check the port again */
853 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
854 ehci->reset_done[wIndex]);
857 /* resume completed? */
858 else if (time_after_eq(jiffies,
859 ehci->reset_done[wIndex])) {
860 clear_bit(wIndex, &ehci->suspended_ports);
861 set_bit(wIndex, &ehci->port_c_suspend);
862 ehci->reset_done[wIndex] = 0;
864 /* stop resume signaling */
865 temp = ehci_readl(ehci, status_reg);
867 temp & ~(PORT_RWC_BITS | PORT_RESUME),
869 retval = handshake(ehci, status_reg,
870 PORT_RESUME, 0, 2000 /* 2msec */);
873 "port %d resume error %d\n",
877 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
881 /* whoever resets must GetPortStatus to complete it!! */
882 if ((temp & PORT_RESET)
883 && time_after_eq(jiffies,
884 ehci->reset_done[wIndex])) {
885 status |= USB_PORT_STAT_C_RESET << 16;
886 ehci->reset_done [wIndex] = 0;
888 /* force reset to complete */
889 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
891 /* REVISIT: some hardware needs 550+ usec to clear
892 * this bit; seems too long to spin routinely...
894 retval = handshake(ehci, status_reg,
895 PORT_RESET, 0, 1000);
897 ehci_err (ehci, "port %d reset error %d\n",
902 /* see what we found out */
903 temp = check_reset_complete (ehci, wIndex, status_reg,
904 ehci_readl(ehci, status_reg));
907 if (!(temp & (PORT_RESUME|PORT_RESET)))
908 ehci->reset_done[wIndex] = 0;
910 /* transfer dedicated ports to the companion hc */
911 if ((temp & PORT_CONNECT) &&
912 test_bit(wIndex, &ehci->companion_ports)) {
913 temp &= ~PORT_RWC_BITS;
915 ehci_writel(ehci, temp, status_reg);
916 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
917 temp = ehci_readl(ehci, status_reg);
921 * Even if OWNER is set, there's no harm letting khubd
922 * see the wPortStatus values (they should all be 0 except
923 * for PORT_POWER anyway).
926 if (temp & PORT_CONNECT) {
927 status |= USB_PORT_STAT_CONNECTION;
928 // status may be from integrated TT
929 if (ehci->has_hostpc) {
930 temp1 = ehci_readl(ehci, hostpc_reg);
931 status |= ehci_port_speed(ehci, temp1);
933 status |= ehci_port_speed(ehci, temp);
936 status |= USB_PORT_STAT_ENABLE;
938 /* maybe the port was unsuspended without our knowledge */
939 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
940 status |= USB_PORT_STAT_SUSPEND;
941 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
942 clear_bit(wIndex, &ehci->suspended_ports);
943 ehci->reset_done[wIndex] = 0;
945 set_bit(wIndex, &ehci->port_c_suspend);
949 status |= USB_PORT_STAT_OVERCURRENT;
950 if (temp & PORT_RESET)
951 status |= USB_PORT_STAT_RESET;
952 if (temp & PORT_POWER)
953 status |= USB_PORT_STAT_POWER;
954 if (test_bit(wIndex, &ehci->port_c_suspend))
955 status |= USB_PORT_STAT_C_SUSPEND << 16;
957 #ifndef VERBOSE_DEBUG
958 if (status & ~0xffff) /* only if wPortChange is interesting */
960 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
961 put_unaligned_le32(status, buf);
965 case C_HUB_LOCAL_POWER:
966 case C_HUB_OVER_CURRENT:
967 /* no hub-wide feature/status flags */
974 selector = wIndex >> 8;
976 if (unlikely(ehci->debug)) {
977 /* If the debug port is active any port
978 * feature requests should get denied */
979 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
980 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
985 if (!wIndex || wIndex > ports)
988 temp = ehci_readl(ehci, status_reg);
989 if (temp & PORT_OWNER)
992 temp &= ~PORT_RWC_BITS;
994 case USB_PORT_FEAT_SUSPEND:
995 if (ehci->no_selective_suspend)
997 if ((temp & PORT_PE) == 0
998 || (temp & PORT_RESET) != 0)
1001 /* After above check the port must be connected.
1002 * Set appropriate bit thus could put phy into low power
1003 * mode if we have hostpc feature
1005 temp &= ~PORT_WKCONN_E;
1006 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1007 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1009 spin_unlock_irqrestore(&ehci->lock, flags);
1010 msleep(5);/* 5ms for HCD enter low pwr mode */
1011 spin_lock_irqsave(&ehci->lock, flags);
1012 temp1 = ehci_readl(ehci, hostpc_reg);
1013 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1015 temp1 = ehci_readl(ehci, hostpc_reg);
1016 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1017 wIndex, (temp1 & HOSTPC_PHCD) ?
1018 "succeeded" : "failed");
1020 set_bit(wIndex, &ehci->suspended_ports);
1022 case USB_PORT_FEAT_POWER:
1023 if (HCS_PPC (ehci->hcs_params))
1024 ehci_writel(ehci, temp | PORT_POWER,
1027 case USB_PORT_FEAT_RESET:
1028 if (temp & PORT_RESUME)
1030 /* line status bits may report this as low speed,
1031 * which can be fine if this root hub has a
1032 * transaction translator built in.
1034 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1035 && !ehci_is_TDI(ehci)
1036 && PORT_USB11 (temp)) {
1038 "port %d low speed --> companion\n",
1042 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1047 * caller must wait, then call GetPortStatus
1048 * usb 2.0 spec says 50 ms resets on root
1050 ehci->reset_done [wIndex] = jiffies
1051 + msecs_to_jiffies (50);
1054 * Force full-speed connect for FSL high-speed
1055 * erratum; disable HS Chirp by setting PFSC bit
1057 if (ehci_has_fsl_hs_errata(ehci))
1058 temp |= (1 << PORTSC_FSL_PFSC);
1060 ehci_writel(ehci, temp, status_reg);
1063 /* For downstream facing ports (these): one hub port is put
1064 * into test mode according to USB2 11.24.2.13, then the hub
1065 * must be reset (which for root hub now means rmmod+modprobe,
1066 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1067 * about the EHCI-specific stuff.
1069 case USB_PORT_FEAT_TEST:
1070 if (!selector || selector > 5)
1074 /* Put all enabled ports into suspend */
1077 &ehci->regs->port_status[ports];
1079 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1081 ehci_writel(ehci, temp | PORT_SUSPEND,
1085 temp = ehci_readl(ehci, status_reg);
1086 temp |= selector << 16;
1087 ehci_writel(ehci, temp, status_reg);
1093 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1098 /* "stall" on error */
1102 spin_unlock_irqrestore (&ehci->lock, flags);
1106 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1108 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1110 if (ehci_is_TDI(ehci))
1112 set_owner(ehci, --portnum, PORT_OWNER);
1115 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1117 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1120 if (ehci_is_TDI(ehci))
1122 reg = &ehci->regs->port_status[portnum - 1];
1123 return ehci_readl(ehci, reg) & PORT_OWNER;