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 port = HCS_N_PORTS (ehci->hcs_params);
124 spin_lock_irq (&ehci->lock);
126 /* stop schedules, clean any completed work */
127 if (HC_IS_RUNNING(hcd->state)) {
129 hcd->state = HC_STATE_QUIESCING;
131 ehci->command = ehci_readl(ehci, &ehci->regs->command);
134 /* Unlike other USB host controller types, EHCI doesn't have
135 * any notion of "global" or bus-wide suspend. The driver has
136 * to manually suspend all the active unsuspended ports, and
137 * then manually resume them in the bus_resume() routine.
139 ehci->bus_suspended = 0;
140 ehci->owned_ports = 0;
142 u32 __iomem *reg = &ehci->regs->port_status [port];
143 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
146 if (ehci->has_hostpc)
147 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
148 + HOSTPC0 + 4 * (port & 0xff));
149 /* keep track of which ports we suspend */
151 set_bit(port, &ehci->owned_ports);
152 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
154 set_bit(port, &ehci->bus_suspended);
157 /* enable remote wakeup on all ports */
158 if (hcd->self.root_hub->do_remote_wakeup) {
159 /* only enable appropriate wake bits, otherwise the
160 * hardware can not go phy low power mode. If a race
161 * condition happens here(connection change during bits
162 * set), the port change detection will finally fix it.
164 if (t1 & PORT_CONNECT) {
165 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
166 t2 &= ~PORT_WKCONN_E;
168 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
169 t2 &= ~PORT_WKDISC_E;
172 t2 &= ~PORT_WAKE_BITS;
175 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
177 ehci_writel(ehci, t2, reg);
181 msleep(5);/* 5ms for HCD enter low pwr mode */
182 t3 = ehci_readl(ehci, hostpc_reg);
183 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
184 t3 = ehci_readl(ehci, hostpc_reg);
185 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
186 port, (t3 & HOSTPC_PHCD) ?
187 "succeeded" : "failed");
192 /* Apparently some devices need a >= 1-uframe delay here */
193 if (ehci->bus_suspended)
196 /* turn off now-idle HC */
198 hcd->state = HC_STATE_SUSPENDED;
201 end_unlink_async(ehci);
203 /* allow remote wakeup */
205 if (!hcd->self.root_hub->do_remote_wakeup)
207 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
208 ehci_readl(ehci, &ehci->regs->intr_enable);
210 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
211 spin_unlock_irq (&ehci->lock);
213 /* ehci_work() may have re-enabled the watchdog timer, which we do not
214 * want, and so we must delete any pending watchdog timer events.
216 del_timer_sync(&ehci->watchdog);
221 /* caller has locked the root hub, and should reset/reinit on error */
222 static int ehci_bus_resume (struct usb_hcd *hcd)
224 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
228 u8 resume_needed = 0;
230 if (time_before (jiffies, ehci->next_statechange))
232 spin_lock_irq (&ehci->lock);
233 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
234 spin_unlock_irq(&ehci->lock);
238 if (unlikely(ehci->debug)) {
239 if (!dbgp_reset_prep())
242 dbgp_external_startup();
245 /* Ideally and we've got a real resume here, and no port's power
246 * was lost. (For PCI, that means Vaux was maintained.) But we
247 * could instead be restoring a swsusp snapshot -- so that BIOS was
248 * the last user of the controller, not reset/pm hardware keeping
249 * state we gave to it.
251 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
252 ehci_dbg(ehci, "resume root hub%s\n",
253 power_okay ? "" : " after power loss");
255 /* at least some APM implementations will try to deliver
256 * IRQs right away, so delay them until we're ready.
258 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
260 /* re-init operational registers */
261 ehci_writel(ehci, 0, &ehci->regs->segment);
262 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
263 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
265 /* restore CMD_RUN, framelist size, and irq threshold */
266 ehci_writel(ehci, ehci->command, &ehci->regs->command);
268 /* Some controller/firmware combinations need a delay during which
269 * they set up the port statuses. See Bugzilla #8190. */
270 spin_unlock_irq(&ehci->lock);
272 spin_lock_irq(&ehci->lock);
274 /* manually resume the ports we suspended during bus_suspend() */
275 i = HCS_N_PORTS (ehci->hcs_params);
277 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
278 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
279 if (test_bit(i, &ehci->bus_suspended) &&
280 (temp & PORT_SUSPEND)) {
284 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
287 /* msleep for 20ms only if code is trying to resume port */
289 spin_unlock_irq(&ehci->lock);
291 spin_lock_irq(&ehci->lock);
294 i = HCS_N_PORTS (ehci->hcs_params);
296 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
297 if (test_bit(i, &ehci->bus_suspended) &&
298 (temp & PORT_SUSPEND)) {
299 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
300 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
301 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
304 (void) ehci_readl(ehci, &ehci->regs->command);
306 /* maybe re-activate the schedule(s) */
308 if (ehci->async->qh_next.qh)
310 if (ehci->periodic_sched)
313 ehci->command |= temp;
314 ehci_writel(ehci, ehci->command, &ehci->regs->command);
317 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
318 hcd->state = HC_STATE_RUNNING;
320 /* Now we can safely re-enable irqs */
321 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
323 spin_unlock_irq (&ehci->lock);
324 ehci_handover_companion_ports(ehci);
330 #define ehci_bus_suspend NULL
331 #define ehci_bus_resume NULL
333 #endif /* CONFIG_PM */
335 /*-------------------------------------------------------------------------*/
337 /* Display the ports dedicated to the companion controller */
338 static ssize_t show_companion(struct device *dev,
339 struct device_attribute *attr,
342 struct ehci_hcd *ehci;
343 int nports, index, n;
344 int count = PAGE_SIZE;
347 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
348 nports = HCS_N_PORTS(ehci->hcs_params);
350 for (index = 0; index < nports; ++index) {
351 if (test_bit(index, &ehci->companion_ports)) {
352 n = scnprintf(ptr, count, "%d\n", index + 1);
361 * Sets the owner of a port
363 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
365 u32 __iomem *status_reg;
369 status_reg = &ehci->regs->port_status[portnum];
372 * The controller won't set the OWNER bit if the port is
373 * enabled, so this loop will sometimes require at least two
374 * iterations: one to disable the port and one to set OWNER.
376 for (try = 4; try > 0; --try) {
377 spin_lock_irq(&ehci->lock);
378 port_status = ehci_readl(ehci, status_reg);
379 if ((port_status & PORT_OWNER) == new_owner
380 || (port_status & (PORT_OWNER | PORT_CONNECT))
384 port_status ^= PORT_OWNER;
385 port_status &= ~(PORT_PE | PORT_RWC_BITS);
386 ehci_writel(ehci, port_status, status_reg);
388 spin_unlock_irq(&ehci->lock);
395 * Dedicate or undedicate a port to the companion controller.
396 * Syntax is "[-]portnum", where a leading '-' sign means
397 * return control of the port to the EHCI controller.
399 static ssize_t store_companion(struct device *dev,
400 struct device_attribute *attr,
401 const char *buf, size_t count)
403 struct ehci_hcd *ehci;
404 int portnum, new_owner;
406 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
407 new_owner = PORT_OWNER; /* Owned by companion */
408 if (sscanf(buf, "%d", &portnum) != 1)
412 new_owner = 0; /* Owned by EHCI */
414 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
418 set_bit(portnum, &ehci->companion_ports);
420 clear_bit(portnum, &ehci->companion_ports);
421 set_owner(ehci, portnum, new_owner);
424 static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
426 static inline void create_companion_file(struct ehci_hcd *ehci)
430 /* with integrated TT there is no companion! */
431 if (!ehci_is_TDI(ehci))
432 i = device_create_file(ehci_to_hcd(ehci)->self.controller,
433 &dev_attr_companion);
436 static inline void remove_companion_file(struct ehci_hcd *ehci)
438 /* with integrated TT there is no companion! */
439 if (!ehci_is_TDI(ehci))
440 device_remove_file(ehci_to_hcd(ehci)->self.controller,
441 &dev_attr_companion);
445 /*-------------------------------------------------------------------------*/
447 static int check_reset_complete (
448 struct ehci_hcd *ehci,
450 u32 __iomem *status_reg,
453 if (!(port_status & PORT_CONNECT))
456 /* if reset finished and it's still not enabled -- handoff */
457 if (!(port_status & PORT_PE)) {
459 /* with integrated TT, there's nobody to hand it to! */
460 if (ehci_is_TDI(ehci)) {
462 "Failed to enable port %d on root hub TT\n",
467 ehci_dbg (ehci, "port %d full speed --> companion\n",
470 // what happens if HCS_N_CC(params) == 0 ?
471 port_status |= PORT_OWNER;
472 port_status &= ~PORT_RWC_BITS;
473 ehci_writel(ehci, port_status, status_reg);
475 /* ensure 440EPX ohci controller state is operational */
476 if (ehci->has_amcc_usb23)
477 set_ohci_hcfs(ehci, 1);
479 ehci_dbg (ehci, "port %d high speed\n", index + 1);
480 /* ensure 440EPx ohci controller state is suspended */
481 if (ehci->has_amcc_usb23)
482 set_ohci_hcfs(ehci, 0);
488 /*-------------------------------------------------------------------------*/
491 /* build "status change" packet (one or two bytes) from HC registers */
494 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
496 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
497 u32 temp, status = 0;
499 int ports, i, retval = 1;
502 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
503 if (!HC_IS_RUNNING(hcd->state))
506 /* init status to no-changes */
508 ports = HCS_N_PORTS (ehci->hcs_params);
514 /* Some boards (mostly VIA?) report bogus overcurrent indications,
515 * causing massive log spam unless we completely ignore them. It
516 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
517 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
518 * PORT_POWER; that's surprising, but maybe within-spec.
521 mask = PORT_CSC | PORT_PEC | PORT_OCC;
523 mask = PORT_CSC | PORT_PEC;
524 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
526 /* no hub change reports (bit 0) for now (power, ...) */
528 /* port N changes (bit N)? */
529 spin_lock_irqsave (&ehci->lock, flags);
530 for (i = 0; i < ports; i++) {
531 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
534 * Return status information even for ports with OWNER set.
535 * Otherwise khubd wouldn't see the disconnect event when a
536 * high-speed device is switched over to the companion
537 * controller by the user.
540 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
541 || (ehci->reset_done[i] && time_after_eq(
542 jiffies, ehci->reset_done[i]))) {
544 buf [0] |= 1 << (i + 1);
546 buf [1] |= 1 << (i - 7);
550 /* FIXME autosuspend idle root hubs */
551 spin_unlock_irqrestore (&ehci->lock, flags);
552 return status ? retval : 0;
555 /*-------------------------------------------------------------------------*/
558 ehci_hub_descriptor (
559 struct ehci_hcd *ehci,
560 struct usb_hub_descriptor *desc
562 int ports = HCS_N_PORTS (ehci->hcs_params);
565 desc->bDescriptorType = 0x29;
566 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
567 desc->bHubContrCurrent = 0;
569 desc->bNbrPorts = ports;
570 temp = 1 + (ports / 8);
571 desc->bDescLength = 7 + 2 * temp;
573 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
574 memset (&desc->bitmap [0], 0, temp);
575 memset (&desc->bitmap [temp], 0xff, temp);
577 temp = 0x0008; /* per-port overcurrent reporting */
578 if (HCS_PPC (ehci->hcs_params))
579 temp |= 0x0001; /* per-port power control */
581 temp |= 0x0002; /* no power switching */
583 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
584 if (HCS_INDICATOR (ehci->hcs_params))
585 temp |= 0x0080; /* per-port indicators (LEDs) */
587 desc->wHubCharacteristics = cpu_to_le16(temp);
590 /*-------------------------------------------------------------------------*/
592 static int ehci_hub_control (
600 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
601 int ports = HCS_N_PORTS (ehci->hcs_params);
602 u32 __iomem *status_reg = &ehci->regs->port_status[
603 (wIndex & 0xff) - 1];
604 u32 __iomem *hostpc_reg = NULL;
605 u32 temp, temp1, status;
611 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
612 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
613 * (track current state ourselves) ... blink for diagnostics,
614 * power, "this is the one", etc. EHCI spec supports this.
617 if (ehci->has_hostpc)
618 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
619 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
620 spin_lock_irqsave (&ehci->lock, flags);
622 case ClearHubFeature:
624 case C_HUB_LOCAL_POWER:
625 case C_HUB_OVER_CURRENT:
626 /* no hub-wide feature/status flags */
632 case ClearPortFeature:
633 if (!wIndex || wIndex > ports)
636 temp = ehci_readl(ehci, status_reg);
639 * Even if OWNER is set, so the port is owned by the
640 * companion controller, khubd needs to be able to clear
641 * the port-change status bits (especially
642 * USB_PORT_FEAT_C_CONNECTION).
646 case USB_PORT_FEAT_ENABLE:
647 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
649 case USB_PORT_FEAT_C_ENABLE:
650 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
653 case USB_PORT_FEAT_SUSPEND:
654 if (temp & PORT_RESET)
656 if (ehci->no_selective_suspend)
658 if (temp & PORT_SUSPEND) {
659 if ((temp & PORT_PE) == 0)
661 /* resume signaling for 20 msec */
662 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
663 ehci_writel(ehci, temp | PORT_RESUME,
665 ehci->reset_done [wIndex] = jiffies
666 + msecs_to_jiffies (20);
669 case USB_PORT_FEAT_C_SUSPEND:
670 clear_bit(wIndex, &ehci->port_c_suspend);
672 case USB_PORT_FEAT_POWER:
673 if (HCS_PPC (ehci->hcs_params))
675 temp & ~(PORT_RWC_BITS | PORT_POWER),
678 case USB_PORT_FEAT_C_CONNECTION:
679 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
682 case USB_PORT_FEAT_C_OVER_CURRENT:
683 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
686 case USB_PORT_FEAT_C_RESET:
687 /* GetPortStatus clears reset */
692 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
694 case GetHubDescriptor:
695 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
699 /* no hub-wide feature/status flags */
701 //cpu_to_le32s ((u32 *) buf);
704 if (!wIndex || wIndex > ports)
708 temp = ehci_readl(ehci, status_reg);
712 status |= 1 << USB_PORT_FEAT_C_CONNECTION;
714 status |= 1 << USB_PORT_FEAT_C_ENABLE;
716 if ((temp & PORT_OCC) && !ignore_oc){
717 status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
720 * Hubs should disable port power on over-current.
721 * However, not all EHCI implementations do this
722 * automatically, even if they _do_ support per-port
723 * power switching; they're allowed to just limit the
724 * current. khubd will turn the power back on.
726 if (HCS_PPC (ehci->hcs_params)){
728 temp & ~(PORT_RWC_BITS | PORT_POWER),
733 /* whoever resumes must GetPortStatus to complete it!! */
734 if (temp & PORT_RESUME) {
736 /* Remote Wakeup received? */
737 if (!ehci->reset_done[wIndex]) {
738 /* resume signaling for 20 msec */
739 ehci->reset_done[wIndex] = jiffies
740 + msecs_to_jiffies(20);
741 /* check the port again */
742 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
743 ehci->reset_done[wIndex]);
746 /* resume completed? */
747 else if (time_after_eq(jiffies,
748 ehci->reset_done[wIndex])) {
749 clear_bit(wIndex, &ehci->suspended_ports);
750 set_bit(wIndex, &ehci->port_c_suspend);
751 ehci->reset_done[wIndex] = 0;
753 /* stop resume signaling */
754 temp = ehci_readl(ehci, status_reg);
756 temp & ~(PORT_RWC_BITS | PORT_RESUME),
758 retval = handshake(ehci, status_reg,
759 PORT_RESUME, 0, 2000 /* 2msec */);
762 "port %d resume error %d\n",
766 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
770 /* whoever resets must GetPortStatus to complete it!! */
771 if ((temp & PORT_RESET)
772 && time_after_eq(jiffies,
773 ehci->reset_done[wIndex])) {
774 status |= 1 << USB_PORT_FEAT_C_RESET;
775 ehci->reset_done [wIndex] = 0;
777 /* force reset to complete */
778 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
780 /* REVISIT: some hardware needs 550+ usec to clear
781 * this bit; seems too long to spin routinely...
783 retval = handshake(ehci, status_reg,
786 ehci_err (ehci, "port %d reset error %d\n",
791 /* see what we found out */
792 temp = check_reset_complete (ehci, wIndex, status_reg,
793 ehci_readl(ehci, status_reg));
796 if (!(temp & (PORT_RESUME|PORT_RESET)))
797 ehci->reset_done[wIndex] = 0;
799 /* transfer dedicated ports to the companion hc */
800 if ((temp & PORT_CONNECT) &&
801 test_bit(wIndex, &ehci->companion_ports)) {
802 temp &= ~PORT_RWC_BITS;
804 ehci_writel(ehci, temp, status_reg);
805 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
806 temp = ehci_readl(ehci, status_reg);
810 * Even if OWNER is set, there's no harm letting khubd
811 * see the wPortStatus values (they should all be 0 except
812 * for PORT_POWER anyway).
815 if (temp & PORT_CONNECT) {
816 status |= 1 << USB_PORT_FEAT_CONNECTION;
817 // status may be from integrated TT
818 if (ehci->has_hostpc) {
819 temp1 = ehci_readl(ehci, hostpc_reg);
820 status |= ehci_port_speed(ehci, temp1);
822 status |= ehci_port_speed(ehci, temp);
825 status |= 1 << USB_PORT_FEAT_ENABLE;
827 /* maybe the port was unsuspended without our knowledge */
828 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
829 status |= 1 << USB_PORT_FEAT_SUSPEND;
830 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
831 clear_bit(wIndex, &ehci->suspended_ports);
832 ehci->reset_done[wIndex] = 0;
834 set_bit(wIndex, &ehci->port_c_suspend);
838 status |= 1 << USB_PORT_FEAT_OVER_CURRENT;
839 if (temp & PORT_RESET)
840 status |= 1 << USB_PORT_FEAT_RESET;
841 if (temp & PORT_POWER)
842 status |= 1 << USB_PORT_FEAT_POWER;
843 if (test_bit(wIndex, &ehci->port_c_suspend))
844 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
846 #ifndef VERBOSE_DEBUG
847 if (status & ~0xffff) /* only if wPortChange is interesting */
849 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
850 put_unaligned_le32(status, buf);
854 case C_HUB_LOCAL_POWER:
855 case C_HUB_OVER_CURRENT:
856 /* no hub-wide feature/status flags */
863 selector = wIndex >> 8;
865 if (unlikely(ehci->debug)) {
866 /* If the debug port is active any port
867 * feature requests should get denied */
868 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
869 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
874 if (!wIndex || wIndex > ports)
877 temp = ehci_readl(ehci, status_reg);
878 if (temp & PORT_OWNER)
881 temp &= ~PORT_RWC_BITS;
883 case USB_PORT_FEAT_SUSPEND:
884 if (ehci->no_selective_suspend)
886 if ((temp & PORT_PE) == 0
887 || (temp & PORT_RESET) != 0)
889 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
890 /* After above check the port must be connected.
891 * Set appropriate bit thus could put phy into low power
892 * mode if we have hostpc feature
895 temp &= ~PORT_WKCONN_E;
896 temp |= (PORT_WKDISC_E | PORT_WKOC_E);
897 ehci_writel(ehci, temp | PORT_SUSPEND,
899 msleep(5);/* 5ms for HCD enter low pwr mode */
900 temp1 = ehci_readl(ehci, hostpc_reg);
901 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
903 temp1 = ehci_readl(ehci, hostpc_reg);
904 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
905 wIndex, (temp1 & HOSTPC_PHCD) ?
906 "succeeded" : "failed");
908 set_bit(wIndex, &ehci->suspended_ports);
910 case USB_PORT_FEAT_POWER:
911 if (HCS_PPC (ehci->hcs_params))
912 ehci_writel(ehci, temp | PORT_POWER,
915 case USB_PORT_FEAT_RESET:
916 if (temp & PORT_RESUME)
918 /* line status bits may report this as low speed,
919 * which can be fine if this root hub has a
920 * transaction translator built in.
922 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
923 && !ehci_is_TDI(ehci)
924 && PORT_USB11 (temp)) {
926 "port %d low speed --> companion\n",
930 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
935 * caller must wait, then call GetPortStatus
936 * usb 2.0 spec says 50 ms resets on root
938 ehci->reset_done [wIndex] = jiffies
939 + msecs_to_jiffies (50);
941 ehci_writel(ehci, temp, status_reg);
944 /* For downstream facing ports (these): one hub port is put
945 * into test mode according to USB2 11.24.2.13, then the hub
946 * must be reset (which for root hub now means rmmod+modprobe,
947 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
948 * about the EHCI-specific stuff.
950 case USB_PORT_FEAT_TEST:
951 if (!selector || selector > 5)
955 temp |= selector << 16;
956 ehci_writel(ehci, temp, status_reg);
962 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
967 /* "stall" on error */
971 spin_unlock_irqrestore (&ehci->lock, flags);
975 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
977 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
979 if (ehci_is_TDI(ehci))
981 set_owner(ehci, --portnum, PORT_OWNER);
984 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
986 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
989 if (ehci_is_TDI(ehci))
991 reg = &ehci->regs->port_status[portnum - 1];
992 return ehci_readl(ehci, reg) & PORT_OWNER;