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);
114 u32 __iomem *hostpc_reg = NULL;
116 ehci_dbg(ehci, "suspend root hub\n");
118 if (time_before (jiffies, ehci->next_statechange))
120 del_timer_sync(&ehci->watchdog);
121 del_timer_sync(&ehci->iaa_watchdog);
123 spin_lock_irq (&ehci->lock);
125 /* Once the controller is stopped, port resumes that are already
126 * in progress won't complete. Hence if remote wakeup is enabled
127 * for the root hub and any ports are in the middle of a resume or
128 * remote wakeup, we must fail the suspend.
130 if (hcd->self.root_hub->do_remote_wakeup) {
131 port = HCS_N_PORTS(ehci->hcs_params);
133 if (ehci->reset_done[port] != 0) {
134 spin_unlock_irq(&ehci->lock);
135 ehci_dbg(ehci, "suspend failed because "
136 "port %d is resuming\n",
143 /* stop schedules, clean any completed work */
144 if (HC_IS_RUNNING(hcd->state)) {
146 hcd->state = HC_STATE_QUIESCING;
148 ehci->command = ehci_readl(ehci, &ehci->regs->command);
151 /* Unlike other USB host controller types, EHCI doesn't have
152 * any notion of "global" or bus-wide suspend. The driver has
153 * to manually suspend all the active unsuspended ports, and
154 * then manually resume them in the bus_resume() routine.
156 ehci->bus_suspended = 0;
157 ehci->owned_ports = 0;
158 port = HCS_N_PORTS(ehci->hcs_params);
160 u32 __iomem *reg = &ehci->regs->port_status [port];
161 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
164 if (ehci->has_hostpc)
165 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
166 + HOSTPC0 + 4 * (port & 0xff));
167 /* keep track of which ports we suspend */
169 set_bit(port, &ehci->owned_ports);
170 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
172 set_bit(port, &ehci->bus_suspended);
175 /* enable remote wakeup on all ports */
176 if (hcd->self.root_hub->do_remote_wakeup) {
177 /* only enable appropriate wake bits, otherwise the
178 * hardware can not go phy low power mode. If a race
179 * condition happens here(connection change during bits
180 * set), the port change detection will finally fix it.
182 if (t1 & PORT_CONNECT) {
183 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
184 t2 &= ~PORT_WKCONN_E;
186 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
187 t2 &= ~PORT_WKDISC_E;
190 t2 &= ~PORT_WAKE_BITS;
193 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
195 ehci_writel(ehci, t2, reg);
199 msleep(5);/* 5ms for HCD enter low pwr mode */
200 t3 = ehci_readl(ehci, hostpc_reg);
201 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
202 t3 = ehci_readl(ehci, hostpc_reg);
203 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
204 port, (t3 & HOSTPC_PHCD) ?
205 "succeeded" : "failed");
210 /* Apparently some devices need a >= 1-uframe delay here */
211 if (ehci->bus_suspended)
214 /* turn off now-idle HC */
216 hcd->state = HC_STATE_SUSPENDED;
219 end_unlink_async(ehci);
221 /* allow remote wakeup */
223 if (!hcd->self.root_hub->do_remote_wakeup)
225 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
226 ehci_readl(ehci, &ehci->regs->intr_enable);
228 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
229 spin_unlock_irq (&ehci->lock);
231 /* ehci_work() may have re-enabled the watchdog timer, which we do not
232 * want, and so we must delete any pending watchdog timer events.
234 del_timer_sync(&ehci->watchdog);
239 /* caller has locked the root hub, and should reset/reinit on error */
240 static int ehci_bus_resume (struct usb_hcd *hcd)
242 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
246 u8 resume_needed = 0;
248 if (time_before (jiffies, ehci->next_statechange))
250 spin_lock_irq (&ehci->lock);
251 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
252 spin_unlock_irq(&ehci->lock);
256 if (unlikely(ehci->debug)) {
257 if (!dbgp_reset_prep())
260 dbgp_external_startup();
263 /* Ideally and we've got a real resume here, and no port's power
264 * was lost. (For PCI, that means Vaux was maintained.) But we
265 * could instead be restoring a swsusp snapshot -- so that BIOS was
266 * the last user of the controller, not reset/pm hardware keeping
267 * state we gave to it.
269 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
270 ehci_dbg(ehci, "resume root hub%s\n",
271 power_okay ? "" : " after power loss");
273 /* at least some APM implementations will try to deliver
274 * IRQs right away, so delay them until we're ready.
276 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
278 /* re-init operational registers */
279 ehci_writel(ehci, 0, &ehci->regs->segment);
280 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
281 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
283 /* restore CMD_RUN, framelist size, and irq threshold */
284 ehci_writel(ehci, ehci->command, &ehci->regs->command);
286 /* Some controller/firmware combinations need a delay during which
287 * they set up the port statuses. See Bugzilla #8190. */
288 spin_unlock_irq(&ehci->lock);
290 spin_lock_irq(&ehci->lock);
292 /* manually resume the ports we suspended during bus_suspend() */
293 i = HCS_N_PORTS (ehci->hcs_params);
295 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
296 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
297 if (test_bit(i, &ehci->bus_suspended) &&
298 (temp & PORT_SUSPEND)) {
302 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
305 /* msleep for 20ms only if code is trying to resume port */
307 spin_unlock_irq(&ehci->lock);
309 spin_lock_irq(&ehci->lock);
312 i = HCS_N_PORTS (ehci->hcs_params);
314 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
315 if (test_bit(i, &ehci->bus_suspended) &&
316 (temp & PORT_SUSPEND)) {
317 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
318 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
319 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
322 (void) ehci_readl(ehci, &ehci->regs->command);
324 /* maybe re-activate the schedule(s) */
326 if (ehci->async->qh_next.qh)
328 if (ehci->periodic_sched)
331 ehci->command |= temp;
332 ehci_writel(ehci, ehci->command, &ehci->regs->command);
335 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
336 hcd->state = HC_STATE_RUNNING;
338 /* Now we can safely re-enable irqs */
339 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
341 spin_unlock_irq (&ehci->lock);
342 ehci_handover_companion_ports(ehci);
348 #define ehci_bus_suspend NULL
349 #define ehci_bus_resume NULL
351 #endif /* CONFIG_PM */
353 /*-------------------------------------------------------------------------*/
355 /* Display the ports dedicated to the companion controller */
356 static ssize_t show_companion(struct device *dev,
357 struct device_attribute *attr,
360 struct ehci_hcd *ehci;
361 int nports, index, n;
362 int count = PAGE_SIZE;
365 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
366 nports = HCS_N_PORTS(ehci->hcs_params);
368 for (index = 0; index < nports; ++index) {
369 if (test_bit(index, &ehci->companion_ports)) {
370 n = scnprintf(ptr, count, "%d\n", index + 1);
379 * Sets the owner of a port
381 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
383 u32 __iomem *status_reg;
387 status_reg = &ehci->regs->port_status[portnum];
390 * The controller won't set the OWNER bit if the port is
391 * enabled, so this loop will sometimes require at least two
392 * iterations: one to disable the port and one to set OWNER.
394 for (try = 4; try > 0; --try) {
395 spin_lock_irq(&ehci->lock);
396 port_status = ehci_readl(ehci, status_reg);
397 if ((port_status & PORT_OWNER) == new_owner
398 || (port_status & (PORT_OWNER | PORT_CONNECT))
402 port_status ^= PORT_OWNER;
403 port_status &= ~(PORT_PE | PORT_RWC_BITS);
404 ehci_writel(ehci, port_status, status_reg);
406 spin_unlock_irq(&ehci->lock);
413 * Dedicate or undedicate a port to the companion controller.
414 * Syntax is "[-]portnum", where a leading '-' sign means
415 * return control of the port to the EHCI controller.
417 static ssize_t store_companion(struct device *dev,
418 struct device_attribute *attr,
419 const char *buf, size_t count)
421 struct ehci_hcd *ehci;
422 int portnum, new_owner;
424 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
425 new_owner = PORT_OWNER; /* Owned by companion */
426 if (sscanf(buf, "%d", &portnum) != 1)
430 new_owner = 0; /* Owned by EHCI */
432 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
436 set_bit(portnum, &ehci->companion_ports);
438 clear_bit(portnum, &ehci->companion_ports);
439 set_owner(ehci, portnum, new_owner);
442 static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
444 static inline void create_companion_file(struct ehci_hcd *ehci)
448 /* with integrated TT there is no companion! */
449 if (!ehci_is_TDI(ehci))
450 i = device_create_file(ehci_to_hcd(ehci)->self.controller,
451 &dev_attr_companion);
454 static inline void remove_companion_file(struct ehci_hcd *ehci)
456 /* with integrated TT there is no companion! */
457 if (!ehci_is_TDI(ehci))
458 device_remove_file(ehci_to_hcd(ehci)->self.controller,
459 &dev_attr_companion);
463 /*-------------------------------------------------------------------------*/
465 static int check_reset_complete (
466 struct ehci_hcd *ehci,
468 u32 __iomem *status_reg,
471 if (!(port_status & PORT_CONNECT))
474 /* if reset finished and it's still not enabled -- handoff */
475 if (!(port_status & PORT_PE)) {
477 /* with integrated TT, there's nobody to hand it to! */
478 if (ehci_is_TDI(ehci)) {
480 "Failed to enable port %d on root hub TT\n",
485 ehci_dbg (ehci, "port %d full speed --> companion\n",
488 // what happens if HCS_N_CC(params) == 0 ?
489 port_status |= PORT_OWNER;
490 port_status &= ~PORT_RWC_BITS;
491 ehci_writel(ehci, port_status, status_reg);
493 /* ensure 440EPX ohci controller state is operational */
494 if (ehci->has_amcc_usb23)
495 set_ohci_hcfs(ehci, 1);
497 ehci_dbg (ehci, "port %d high speed\n", index + 1);
498 /* ensure 440EPx ohci controller state is suspended */
499 if (ehci->has_amcc_usb23)
500 set_ohci_hcfs(ehci, 0);
506 /*-------------------------------------------------------------------------*/
509 /* build "status change" packet (one or two bytes) from HC registers */
512 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
514 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
515 u32 temp, status = 0;
517 int ports, i, retval = 1;
520 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
521 if (!HC_IS_RUNNING(hcd->state))
524 /* init status to no-changes */
526 ports = HCS_N_PORTS (ehci->hcs_params);
532 /* Some boards (mostly VIA?) report bogus overcurrent indications,
533 * causing massive log spam unless we completely ignore them. It
534 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
535 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
536 * PORT_POWER; that's surprising, but maybe within-spec.
539 mask = PORT_CSC | PORT_PEC | PORT_OCC;
541 mask = PORT_CSC | PORT_PEC;
542 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
544 /* no hub change reports (bit 0) for now (power, ...) */
546 /* port N changes (bit N)? */
547 spin_lock_irqsave (&ehci->lock, flags);
548 for (i = 0; i < ports; i++) {
549 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
552 * Return status information even for ports with OWNER set.
553 * Otherwise khubd wouldn't see the disconnect event when a
554 * high-speed device is switched over to the companion
555 * controller by the user.
558 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
559 || (ehci->reset_done[i] && time_after_eq(
560 jiffies, ehci->reset_done[i]))) {
562 buf [0] |= 1 << (i + 1);
564 buf [1] |= 1 << (i - 7);
568 /* FIXME autosuspend idle root hubs */
569 spin_unlock_irqrestore (&ehci->lock, flags);
570 return status ? retval : 0;
573 /*-------------------------------------------------------------------------*/
576 ehci_hub_descriptor (
577 struct ehci_hcd *ehci,
578 struct usb_hub_descriptor *desc
580 int ports = HCS_N_PORTS (ehci->hcs_params);
583 desc->bDescriptorType = 0x29;
584 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
585 desc->bHubContrCurrent = 0;
587 desc->bNbrPorts = ports;
588 temp = 1 + (ports / 8);
589 desc->bDescLength = 7 + 2 * temp;
591 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
592 memset (&desc->bitmap [0], 0, temp);
593 memset (&desc->bitmap [temp], 0xff, temp);
595 temp = 0x0008; /* per-port overcurrent reporting */
596 if (HCS_PPC (ehci->hcs_params))
597 temp |= 0x0001; /* per-port power control */
599 temp |= 0x0002; /* no power switching */
601 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
602 if (HCS_INDICATOR (ehci->hcs_params))
603 temp |= 0x0080; /* per-port indicators (LEDs) */
605 desc->wHubCharacteristics = cpu_to_le16(temp);
608 /*-------------------------------------------------------------------------*/
610 static int ehci_hub_control (
618 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
619 int ports = HCS_N_PORTS (ehci->hcs_params);
620 u32 __iomem *status_reg = &ehci->regs->port_status[
621 (wIndex & 0xff) - 1];
622 u32 __iomem *hostpc_reg = NULL;
623 u32 temp, temp1, status;
629 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
630 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
631 * (track current state ourselves) ... blink for diagnostics,
632 * power, "this is the one", etc. EHCI spec supports this.
635 if (ehci->has_hostpc)
636 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
637 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
638 spin_lock_irqsave (&ehci->lock, flags);
640 case ClearHubFeature:
642 case C_HUB_LOCAL_POWER:
643 case C_HUB_OVER_CURRENT:
644 /* no hub-wide feature/status flags */
650 case ClearPortFeature:
651 if (!wIndex || wIndex > ports)
654 temp = ehci_readl(ehci, status_reg);
657 * Even if OWNER is set, so the port is owned by the
658 * companion controller, khubd needs to be able to clear
659 * the port-change status bits (especially
660 * USB_PORT_FEAT_C_CONNECTION).
664 case USB_PORT_FEAT_ENABLE:
665 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
667 case USB_PORT_FEAT_C_ENABLE:
668 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
671 case USB_PORT_FEAT_SUSPEND:
672 if (temp & PORT_RESET)
674 if (ehci->no_selective_suspend)
676 if (temp & PORT_SUSPEND) {
677 if ((temp & PORT_PE) == 0)
679 /* resume signaling for 20 msec */
680 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
681 ehci_writel(ehci, temp | PORT_RESUME,
683 ehci->reset_done [wIndex] = jiffies
684 + msecs_to_jiffies (20);
687 case USB_PORT_FEAT_C_SUSPEND:
688 clear_bit(wIndex, &ehci->port_c_suspend);
690 case USB_PORT_FEAT_POWER:
691 if (HCS_PPC (ehci->hcs_params))
693 temp & ~(PORT_RWC_BITS | PORT_POWER),
696 case USB_PORT_FEAT_C_CONNECTION:
697 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
700 case USB_PORT_FEAT_C_OVER_CURRENT:
701 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
704 case USB_PORT_FEAT_C_RESET:
705 /* GetPortStatus clears reset */
710 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
712 case GetHubDescriptor:
713 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
717 /* no hub-wide feature/status flags */
719 //cpu_to_le32s ((u32 *) buf);
722 if (!wIndex || wIndex > ports)
726 temp = ehci_readl(ehci, status_reg);
730 status |= 1 << USB_PORT_FEAT_C_CONNECTION;
732 status |= 1 << USB_PORT_FEAT_C_ENABLE;
734 if ((temp & PORT_OCC) && !ignore_oc){
735 status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
738 * Hubs should disable port power on over-current.
739 * However, not all EHCI implementations do this
740 * automatically, even if they _do_ support per-port
741 * power switching; they're allowed to just limit the
742 * current. khubd will turn the power back on.
744 if (HCS_PPC (ehci->hcs_params)){
746 temp & ~(PORT_RWC_BITS | PORT_POWER),
751 /* whoever resumes must GetPortStatus to complete it!! */
752 if (temp & PORT_RESUME) {
754 /* Remote Wakeup received? */
755 if (!ehci->reset_done[wIndex]) {
756 /* resume signaling for 20 msec */
757 ehci->reset_done[wIndex] = jiffies
758 + msecs_to_jiffies(20);
759 /* check the port again */
760 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
761 ehci->reset_done[wIndex]);
764 /* resume completed? */
765 else if (time_after_eq(jiffies,
766 ehci->reset_done[wIndex])) {
767 clear_bit(wIndex, &ehci->suspended_ports);
768 set_bit(wIndex, &ehci->port_c_suspend);
769 ehci->reset_done[wIndex] = 0;
771 /* stop resume signaling */
772 temp = ehci_readl(ehci, status_reg);
774 temp & ~(PORT_RWC_BITS | PORT_RESUME),
776 retval = handshake(ehci, status_reg,
777 PORT_RESUME, 0, 2000 /* 2msec */);
780 "port %d resume error %d\n",
784 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
788 /* whoever resets must GetPortStatus to complete it!! */
789 if ((temp & PORT_RESET)
790 && time_after_eq(jiffies,
791 ehci->reset_done[wIndex])) {
792 status |= 1 << USB_PORT_FEAT_C_RESET;
793 ehci->reset_done [wIndex] = 0;
795 /* force reset to complete */
796 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
798 /* REVISIT: some hardware needs 550+ usec to clear
799 * this bit; seems too long to spin routinely...
801 retval = handshake(ehci, status_reg,
804 ehci_err (ehci, "port %d reset error %d\n",
809 /* see what we found out */
810 temp = check_reset_complete (ehci, wIndex, status_reg,
811 ehci_readl(ehci, status_reg));
814 if (!(temp & (PORT_RESUME|PORT_RESET)))
815 ehci->reset_done[wIndex] = 0;
817 /* transfer dedicated ports to the companion hc */
818 if ((temp & PORT_CONNECT) &&
819 test_bit(wIndex, &ehci->companion_ports)) {
820 temp &= ~PORT_RWC_BITS;
822 ehci_writel(ehci, temp, status_reg);
823 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
824 temp = ehci_readl(ehci, status_reg);
828 * Even if OWNER is set, there's no harm letting khubd
829 * see the wPortStatus values (they should all be 0 except
830 * for PORT_POWER anyway).
833 if (temp & PORT_CONNECT) {
834 status |= 1 << USB_PORT_FEAT_CONNECTION;
835 // status may be from integrated TT
836 if (ehci->has_hostpc) {
837 temp1 = ehci_readl(ehci, hostpc_reg);
838 status |= ehci_port_speed(ehci, temp1);
840 status |= ehci_port_speed(ehci, temp);
843 status |= 1 << USB_PORT_FEAT_ENABLE;
845 /* maybe the port was unsuspended without our knowledge */
846 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
847 status |= 1 << USB_PORT_FEAT_SUSPEND;
848 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
849 clear_bit(wIndex, &ehci->suspended_ports);
850 ehci->reset_done[wIndex] = 0;
852 set_bit(wIndex, &ehci->port_c_suspend);
856 status |= 1 << USB_PORT_FEAT_OVER_CURRENT;
857 if (temp & PORT_RESET)
858 status |= 1 << USB_PORT_FEAT_RESET;
859 if (temp & PORT_POWER)
860 status |= 1 << USB_PORT_FEAT_POWER;
861 if (test_bit(wIndex, &ehci->port_c_suspend))
862 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
864 #ifndef VERBOSE_DEBUG
865 if (status & ~0xffff) /* only if wPortChange is interesting */
867 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
868 put_unaligned_le32(status, buf);
872 case C_HUB_LOCAL_POWER:
873 case C_HUB_OVER_CURRENT:
874 /* no hub-wide feature/status flags */
881 selector = wIndex >> 8;
883 if (unlikely(ehci->debug)) {
884 /* If the debug port is active any port
885 * feature requests should get denied */
886 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
887 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
892 if (!wIndex || wIndex > ports)
895 temp = ehci_readl(ehci, status_reg);
896 if (temp & PORT_OWNER)
899 temp &= ~PORT_RWC_BITS;
901 case USB_PORT_FEAT_SUSPEND:
902 if (ehci->no_selective_suspend)
904 if ((temp & PORT_PE) == 0
905 || (temp & PORT_RESET) != 0)
907 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
908 /* After above check the port must be connected.
909 * Set appropriate bit thus could put phy into low power
910 * mode if we have hostpc feature
913 temp &= ~PORT_WKCONN_E;
914 temp |= (PORT_WKDISC_E | PORT_WKOC_E);
915 ehci_writel(ehci, temp | PORT_SUSPEND,
917 msleep(5);/* 5ms for HCD enter low pwr mode */
918 temp1 = ehci_readl(ehci, hostpc_reg);
919 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
921 temp1 = ehci_readl(ehci, hostpc_reg);
922 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
923 wIndex, (temp1 & HOSTPC_PHCD) ?
924 "succeeded" : "failed");
926 set_bit(wIndex, &ehci->suspended_ports);
928 case USB_PORT_FEAT_POWER:
929 if (HCS_PPC (ehci->hcs_params))
930 ehci_writel(ehci, temp | PORT_POWER,
933 case USB_PORT_FEAT_RESET:
934 if (temp & PORT_RESUME)
936 /* line status bits may report this as low speed,
937 * which can be fine if this root hub has a
938 * transaction translator built in.
940 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
941 && !ehci_is_TDI(ehci)
942 && PORT_USB11 (temp)) {
944 "port %d low speed --> companion\n",
948 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
953 * caller must wait, then call GetPortStatus
954 * usb 2.0 spec says 50 ms resets on root
956 ehci->reset_done [wIndex] = jiffies
957 + msecs_to_jiffies (50);
959 ehci_writel(ehci, temp, status_reg);
962 /* For downstream facing ports (these): one hub port is put
963 * into test mode according to USB2 11.24.2.13, then the hub
964 * must be reset (which for root hub now means rmmod+modprobe,
965 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
966 * about the EHCI-specific stuff.
968 case USB_PORT_FEAT_TEST:
969 if (!selector || selector > 5)
973 temp |= selector << 16;
974 ehci_writel(ehci, temp, status_reg);
980 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
985 /* "stall" on error */
989 spin_unlock_irqrestore (&ehci->lock, flags);
993 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
995 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
997 if (ehci_is_TDI(ehci))
999 set_owner(ehci, --portnum, PORT_OWNER);
1002 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1004 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1007 if (ehci_is_TDI(ehci))
1009 reg = &ehci->regs->port_status[portnum - 1];
1010 return ehci_readl(ehci, reg) & PORT_OWNER;