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 /*-------------------------------------------------------------------------*/
33 static int ehci_hub_control(
42 /* After a power loss, ports that were owned by the companion must be
43 * reset so that the companion can still own them.
45 static void ehci_handover_companion_ports(struct ehci_hcd
*ehci
)
51 struct usb_hcd
*hcd
= ehci_to_hcd(ehci
);
53 if (!ehci
->owned_ports
)
56 /* Give the connections some time to appear */
59 port
= HCS_N_PORTS(ehci
->hcs_params
);
61 if (test_bit(port
, &ehci
->owned_ports
)) {
62 reg
= &ehci
->regs
->port_status
[port
];
63 status
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
65 /* Port already owned by companion? */
66 if (status
& PORT_OWNER
)
67 clear_bit(port
, &ehci
->owned_ports
);
68 else if (test_bit(port
, &ehci
->companion_ports
))
69 ehci_writel(ehci
, status
& ~PORT_PE
, reg
);
71 ehci_hub_control(hcd
, SetPortFeature
,
72 USB_PORT_FEAT_RESET
, port
+ 1,
77 if (!ehci
->owned_ports
)
79 msleep(90); /* Wait for resets to complete */
81 port
= HCS_N_PORTS(ehci
->hcs_params
);
83 if (test_bit(port
, &ehci
->owned_ports
)) {
84 ehci_hub_control(hcd
, GetPortStatus
,
86 (char *) &buf
, sizeof(buf
));
88 /* The companion should now own the port,
89 * but if something went wrong the port must not
92 reg
= &ehci
->regs
->port_status
[port
];
93 status
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
94 if (status
& PORT_OWNER
)
95 ehci_writel(ehci
, status
| PORT_CSC
, reg
);
97 ehci_dbg(ehci
, "failed handover port %d: %x\n",
99 ehci_writel(ehci
, status
& ~PORT_PE
, reg
);
104 ehci
->owned_ports
= 0;
107 static int ehci_bus_suspend (struct usb_hcd
*hcd
)
109 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
113 ehci_dbg(ehci
, "suspend root hub\n");
115 if (time_before (jiffies
, ehci
->next_statechange
))
117 del_timer_sync(&ehci
->watchdog
);
118 del_timer_sync(&ehci
->iaa_watchdog
);
120 port
= HCS_N_PORTS (ehci
->hcs_params
);
121 spin_lock_irq (&ehci
->lock
);
123 /* stop schedules, clean any completed work */
124 if (HC_IS_RUNNING(hcd
->state
)) {
126 hcd
->state
= HC_STATE_QUIESCING
;
128 ehci
->command
= ehci_readl(ehci
, &ehci
->regs
->command
);
131 /* Unlike other USB host controller types, EHCI doesn't have
132 * any notion of "global" or bus-wide suspend. The driver has
133 * to manually suspend all the active unsuspended ports, and
134 * then manually resume them in the bus_resume() routine.
136 ehci
->bus_suspended
= 0;
137 ehci
->owned_ports
= 0;
139 u32 __iomem
*reg
= &ehci
->regs
->port_status
[port
];
140 u32 t1
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
143 /* keep track of which ports we suspend */
145 set_bit(port
, &ehci
->owned_ports
);
146 else if ((t1
& PORT_PE
) && !(t1
& PORT_SUSPEND
)) {
148 set_bit(port
, &ehci
->bus_suspended
);
151 /* enable remote wakeup on all ports */
152 if (device_may_wakeup(&hcd
->self
.root_hub
->dev
))
153 t2
|= PORT_WKOC_E
|PORT_WKDISC_E
|PORT_WKCONN_E
;
155 t2
&= ~(PORT_WKOC_E
|PORT_WKDISC_E
|PORT_WKCONN_E
);
158 ehci_vdbg (ehci
, "port %d, %08x -> %08x\n",
160 ehci_writel(ehci
, t2
, reg
);
164 /* Apparently some devices need a >= 1-uframe delay here */
165 if (ehci
->bus_suspended
)
168 /* turn off now-idle HC */
170 hcd
->state
= HC_STATE_SUSPENDED
;
173 end_unlink_async(ehci
);
175 /* allow remote wakeup */
177 if (!device_may_wakeup(&hcd
->self
.root_hub
->dev
))
179 ehci_writel(ehci
, mask
, &ehci
->regs
->intr_enable
);
180 ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
182 ehci
->next_statechange
= jiffies
+ msecs_to_jiffies(10);
183 spin_unlock_irq (&ehci
->lock
);
188 /* caller has locked the root hub, and should reset/reinit on error */
189 static int ehci_bus_resume (struct usb_hcd
*hcd
)
191 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
196 if (time_before (jiffies
, ehci
->next_statechange
))
198 spin_lock_irq (&ehci
->lock
);
199 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
200 spin_unlock_irq(&ehci
->lock
);
204 /* Ideally and we've got a real resume here, and no port's power
205 * was lost. (For PCI, that means Vaux was maintained.) But we
206 * could instead be restoring a swsusp snapshot -- so that BIOS was
207 * the last user of the controller, not reset/pm hardware keeping
208 * state we gave to it.
210 power_okay
= ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
211 ehci_dbg(ehci
, "resume root hub%s\n",
212 power_okay
? "" : " after power loss");
214 /* at least some APM implementations will try to deliver
215 * IRQs right away, so delay them until we're ready.
217 ehci_writel(ehci
, 0, &ehci
->regs
->intr_enable
);
219 /* re-init operational registers */
220 ehci_writel(ehci
, 0, &ehci
->regs
->segment
);
221 ehci_writel(ehci
, ehci
->periodic_dma
, &ehci
->regs
->frame_list
);
222 ehci_writel(ehci
, (u32
) ehci
->async
->qh_dma
, &ehci
->regs
->async_next
);
224 /* restore CMD_RUN, framelist size, and irq threshold */
225 ehci_writel(ehci
, ehci
->command
, &ehci
->regs
->command
);
227 /* Some controller/firmware combinations need a delay during which
228 * they set up the port statuses. See Bugzilla #8190. */
231 /* manually resume the ports we suspended during bus_suspend() */
232 i
= HCS_N_PORTS (ehci
->hcs_params
);
234 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
235 temp
&= ~(PORT_RWC_BITS
236 | PORT_WKOC_E
| PORT_WKDISC_E
| PORT_WKCONN_E
);
237 if (test_bit(i
, &ehci
->bus_suspended
) &&
238 (temp
& PORT_SUSPEND
)) {
239 ehci
->reset_done
[i
] = jiffies
+ msecs_to_jiffies (20);
242 ehci_writel(ehci
, temp
, &ehci
->regs
->port_status
[i
]);
244 i
= HCS_N_PORTS (ehci
->hcs_params
);
247 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
248 if (test_bit(i
, &ehci
->bus_suspended
) &&
249 (temp
& PORT_SUSPEND
)) {
250 temp
&= ~(PORT_RWC_BITS
| PORT_RESUME
);
251 ehci_writel(ehci
, temp
, &ehci
->regs
->port_status
[i
]);
252 ehci_vdbg (ehci
, "resumed port %d\n", i
+ 1);
255 (void) ehci_readl(ehci
, &ehci
->regs
->command
);
257 /* maybe re-activate the schedule(s) */
259 if (ehci
->async
->qh_next
.qh
)
261 if (ehci
->periodic_sched
)
264 ehci
->command
|= temp
;
265 ehci_writel(ehci
, ehci
->command
, &ehci
->regs
->command
);
268 ehci
->next_statechange
= jiffies
+ msecs_to_jiffies(5);
269 hcd
->state
= HC_STATE_RUNNING
;
271 /* Now we can safely re-enable irqs */
272 ehci_writel(ehci
, INTR_MASK
, &ehci
->regs
->intr_enable
);
274 spin_unlock_irq (&ehci
->lock
);
275 ehci_handover_companion_ports(ehci
);
281 #define ehci_bus_suspend NULL
282 #define ehci_bus_resume NULL
284 #endif /* CONFIG_PM */
286 /*-------------------------------------------------------------------------*/
288 /* Display the ports dedicated to the companion controller */
289 static ssize_t
show_companion(struct device
*dev
,
290 struct device_attribute
*attr
,
293 struct ehci_hcd
*ehci
;
294 int nports
, index
, n
;
295 int count
= PAGE_SIZE
;
298 ehci
= hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev
)));
299 nports
= HCS_N_PORTS(ehci
->hcs_params
);
301 for (index
= 0; index
< nports
; ++index
) {
302 if (test_bit(index
, &ehci
->companion_ports
)) {
303 n
= scnprintf(ptr
, count
, "%d\n", index
+ 1);
312 * Sets the owner of a port
314 static void set_owner(struct ehci_hcd
*ehci
, int portnum
, int new_owner
)
316 u32 __iomem
*status_reg
;
320 status_reg
= &ehci
->regs
->port_status
[portnum
];
323 * The controller won't set the OWNER bit if the port is
324 * enabled, so this loop will sometimes require at least two
325 * iterations: one to disable the port and one to set OWNER.
327 for (try = 4; try > 0; --try) {
328 spin_lock_irq(&ehci
->lock
);
329 port_status
= ehci_readl(ehci
, status_reg
);
330 if ((port_status
& PORT_OWNER
) == new_owner
331 || (port_status
& (PORT_OWNER
| PORT_CONNECT
))
335 port_status
^= PORT_OWNER
;
336 port_status
&= ~(PORT_PE
| PORT_RWC_BITS
);
337 ehci_writel(ehci
, port_status
, status_reg
);
339 spin_unlock_irq(&ehci
->lock
);
346 * Dedicate or undedicate a port to the companion controller.
347 * Syntax is "[-]portnum", where a leading '-' sign means
348 * return control of the port to the EHCI controller.
350 static ssize_t
store_companion(struct device
*dev
,
351 struct device_attribute
*attr
,
352 const char *buf
, size_t count
)
354 struct ehci_hcd
*ehci
;
355 int portnum
, new_owner
;
357 ehci
= hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev
)));
358 new_owner
= PORT_OWNER
; /* Owned by companion */
359 if (sscanf(buf
, "%d", &portnum
) != 1)
363 new_owner
= 0; /* Owned by EHCI */
365 if (portnum
<= 0 || portnum
> HCS_N_PORTS(ehci
->hcs_params
))
369 set_bit(portnum
, &ehci
->companion_ports
);
371 clear_bit(portnum
, &ehci
->companion_ports
);
372 set_owner(ehci
, portnum
, new_owner
);
375 static DEVICE_ATTR(companion
, 0644, show_companion
, store_companion
);
377 static inline void create_companion_file(struct ehci_hcd
*ehci
)
381 /* with integrated TT there is no companion! */
382 if (!ehci_is_TDI(ehci
))
383 i
= device_create_file(ehci_to_hcd(ehci
)->self
.dev
,
384 &dev_attr_companion
);
387 static inline void remove_companion_file(struct ehci_hcd
*ehci
)
389 /* with integrated TT there is no companion! */
390 if (!ehci_is_TDI(ehci
))
391 device_remove_file(ehci_to_hcd(ehci
)->self
.dev
,
392 &dev_attr_companion
);
396 /*-------------------------------------------------------------------------*/
398 static int check_reset_complete (
399 struct ehci_hcd
*ehci
,
401 u32 __iomem
*status_reg
,
404 if (!(port_status
& PORT_CONNECT
))
407 /* if reset finished and it's still not enabled -- handoff */
408 if (!(port_status
& PORT_PE
)) {
410 /* with integrated TT, there's nobody to hand it to! */
411 if (ehci_is_TDI(ehci
)) {
413 "Failed to enable port %d on root hub TT\n",
418 ehci_dbg (ehci
, "port %d full speed --> companion\n",
421 // what happens if HCS_N_CC(params) == 0 ?
422 port_status
|= PORT_OWNER
;
423 port_status
&= ~PORT_RWC_BITS
;
424 ehci_writel(ehci
, port_status
, status_reg
);
427 ehci_dbg (ehci
, "port %d high speed\n", index
+ 1);
432 /*-------------------------------------------------------------------------*/
435 /* build "status change" packet (one or two bytes) from HC registers */
438 ehci_hub_status_data (struct usb_hcd
*hcd
, char *buf
)
440 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
441 u32 temp
, status
= 0;
443 int ports
, i
, retval
= 1;
446 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
447 if (!HC_IS_RUNNING(hcd
->state
))
450 /* init status to no-changes */
452 ports
= HCS_N_PORTS (ehci
->hcs_params
);
458 /* Some boards (mostly VIA?) report bogus overcurrent indications,
459 * causing massive log spam unless we completely ignore them. It
460 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
461 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
462 * PORT_POWER; that's surprising, but maybe within-spec.
465 mask
= PORT_CSC
| PORT_PEC
| PORT_OCC
;
467 mask
= PORT_CSC
| PORT_PEC
;
468 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
470 /* no hub change reports (bit 0) for now (power, ...) */
472 /* port N changes (bit N)? */
473 spin_lock_irqsave (&ehci
->lock
, flags
);
474 for (i
= 0; i
< ports
; i
++) {
475 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
478 * Return status information even for ports with OWNER set.
479 * Otherwise khubd wouldn't see the disconnect event when a
480 * high-speed device is switched over to the companion
481 * controller by the user.
484 if ((temp
& mask
) != 0
485 || ((temp
& PORT_RESUME
) != 0
486 && time_after_eq(jiffies
,
487 ehci
->reset_done
[i
]))) {
489 buf
[0] |= 1 << (i
+ 1);
491 buf
[1] |= 1 << (i
- 7);
495 /* FIXME autosuspend idle root hubs */
496 spin_unlock_irqrestore (&ehci
->lock
, flags
);
497 return status
? retval
: 0;
500 /*-------------------------------------------------------------------------*/
503 ehci_hub_descriptor (
504 struct ehci_hcd
*ehci
,
505 struct usb_hub_descriptor
*desc
507 int ports
= HCS_N_PORTS (ehci
->hcs_params
);
510 desc
->bDescriptorType
= 0x29;
511 desc
->bPwrOn2PwrGood
= 10; /* ehci 1.0, 2.3.9 says 20ms max */
512 desc
->bHubContrCurrent
= 0;
514 desc
->bNbrPorts
= ports
;
515 temp
= 1 + (ports
/ 8);
516 desc
->bDescLength
= 7 + 2 * temp
;
518 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
519 memset (&desc
->bitmap
[0], 0, temp
);
520 memset (&desc
->bitmap
[temp
], 0xff, temp
);
522 temp
= 0x0008; /* per-port overcurrent reporting */
523 if (HCS_PPC (ehci
->hcs_params
))
524 temp
|= 0x0001; /* per-port power control */
526 temp
|= 0x0002; /* no power switching */
528 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
529 if (HCS_INDICATOR (ehci
->hcs_params
))
530 temp
|= 0x0080; /* per-port indicators (LEDs) */
532 desc
->wHubCharacteristics
= (__force __u16
)cpu_to_le16 (temp
);
535 /*-------------------------------------------------------------------------*/
537 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
539 static int ehci_hub_control (
547 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
548 int ports
= HCS_N_PORTS (ehci
->hcs_params
);
549 u32 __iomem
*status_reg
= &ehci
->regs
->port_status
[
550 (wIndex
& 0xff) - 1];
557 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
558 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
559 * (track current state ourselves) ... blink for diagnostics,
560 * power, "this is the one", etc. EHCI spec supports this.
563 spin_lock_irqsave (&ehci
->lock
, flags
);
565 case ClearHubFeature
:
567 case C_HUB_LOCAL_POWER
:
568 case C_HUB_OVER_CURRENT
:
569 /* no hub-wide feature/status flags */
575 case ClearPortFeature
:
576 if (!wIndex
|| wIndex
> ports
)
579 temp
= ehci_readl(ehci
, status_reg
);
582 * Even if OWNER is set, so the port is owned by the
583 * companion controller, khubd needs to be able to clear
584 * the port-change status bits (especially
585 * USB_PORT_FEAT_C_CONNECTION).
589 case USB_PORT_FEAT_ENABLE
:
590 ehci_writel(ehci
, temp
& ~PORT_PE
, status_reg
);
592 case USB_PORT_FEAT_C_ENABLE
:
593 ehci_writel(ehci
, (temp
& ~PORT_RWC_BITS
) | PORT_PEC
,
596 case USB_PORT_FEAT_SUSPEND
:
597 if (temp
& PORT_RESET
)
599 if (ehci
->no_selective_suspend
)
601 if (temp
& PORT_SUSPEND
) {
602 if ((temp
& PORT_PE
) == 0)
604 /* resume signaling for 20 msec */
605 temp
&= ~(PORT_RWC_BITS
| PORT_WAKE_BITS
);
606 ehci_writel(ehci
, temp
| PORT_RESUME
,
608 ehci
->reset_done
[wIndex
] = jiffies
609 + msecs_to_jiffies (20);
612 case USB_PORT_FEAT_C_SUSPEND
:
613 /* we auto-clear this feature */
615 case USB_PORT_FEAT_POWER
:
616 if (HCS_PPC (ehci
->hcs_params
))
618 temp
& ~(PORT_RWC_BITS
| PORT_POWER
),
621 case USB_PORT_FEAT_C_CONNECTION
:
622 ehci_writel(ehci
, (temp
& ~PORT_RWC_BITS
) | PORT_CSC
,
625 case USB_PORT_FEAT_C_OVER_CURRENT
:
626 ehci_writel(ehci
, (temp
& ~PORT_RWC_BITS
) | PORT_OCC
,
629 case USB_PORT_FEAT_C_RESET
:
630 /* GetPortStatus clears reset */
635 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted write */
637 case GetHubDescriptor
:
638 ehci_hub_descriptor (ehci
, (struct usb_hub_descriptor
*)
642 /* no hub-wide feature/status flags */
644 //cpu_to_le32s ((u32 *) buf);
647 if (!wIndex
|| wIndex
> ports
)
651 temp
= ehci_readl(ehci
, status_reg
);
655 status
|= 1 << USB_PORT_FEAT_C_CONNECTION
;
657 status
|= 1 << USB_PORT_FEAT_C_ENABLE
;
659 if ((temp
& PORT_OCC
) && !ignore_oc
){
660 status
|= 1 << USB_PORT_FEAT_C_OVER_CURRENT
;
663 * Hubs should disable port power on over-current.
664 * However, not all EHCI implementations do this
665 * automatically, even if they _do_ support per-port
666 * power switching; they're allowed to just limit the
667 * current. khubd will turn the power back on.
669 if (HCS_PPC (ehci
->hcs_params
)){
671 temp
& ~(PORT_RWC_BITS
| PORT_POWER
),
676 /* whoever resumes must GetPortStatus to complete it!! */
677 if (temp
& PORT_RESUME
) {
679 /* Remote Wakeup received? */
680 if (!ehci
->reset_done
[wIndex
]) {
681 /* resume signaling for 20 msec */
682 ehci
->reset_done
[wIndex
] = jiffies
683 + msecs_to_jiffies(20);
684 /* check the port again */
685 mod_timer(&ehci_to_hcd(ehci
)->rh_timer
,
686 ehci
->reset_done
[wIndex
]);
689 /* resume completed? */
690 else if (time_after_eq(jiffies
,
691 ehci
->reset_done
[wIndex
])) {
692 status
|= 1 << USB_PORT_FEAT_C_SUSPEND
;
693 ehci
->reset_done
[wIndex
] = 0;
695 /* stop resume signaling */
696 temp
= ehci_readl(ehci
, status_reg
);
698 temp
& ~(PORT_RWC_BITS
| PORT_RESUME
),
700 retval
= handshake(ehci
, status_reg
,
701 PORT_RESUME
, 0, 2000 /* 2msec */);
704 "port %d resume error %d\n",
708 temp
&= ~(PORT_SUSPEND
|PORT_RESUME
|(3<<10));
712 /* whoever resets must GetPortStatus to complete it!! */
713 if ((temp
& PORT_RESET
)
714 && time_after_eq(jiffies
,
715 ehci
->reset_done
[wIndex
])) {
716 status
|= 1 << USB_PORT_FEAT_C_RESET
;
717 ehci
->reset_done
[wIndex
] = 0;
719 /* force reset to complete */
720 ehci_writel(ehci
, temp
& ~(PORT_RWC_BITS
| PORT_RESET
),
722 /* REVISIT: some hardware needs 550+ usec to clear
723 * this bit; seems too long to spin routinely...
725 retval
= handshake(ehci
, status_reg
,
728 ehci_err (ehci
, "port %d reset error %d\n",
733 /* see what we found out */
734 temp
= check_reset_complete (ehci
, wIndex
, status_reg
,
735 ehci_readl(ehci
, status_reg
));
738 /* transfer dedicated ports to the companion hc */
739 if ((temp
& PORT_CONNECT
) &&
740 test_bit(wIndex
, &ehci
->companion_ports
)) {
741 temp
&= ~PORT_RWC_BITS
;
743 ehci_writel(ehci
, temp
, status_reg
);
744 ehci_dbg(ehci
, "port %d --> companion\n", wIndex
+ 1);
745 temp
= ehci_readl(ehci
, status_reg
);
749 * Even if OWNER is set, there's no harm letting khubd
750 * see the wPortStatus values (they should all be 0 except
751 * for PORT_POWER anyway).
754 if (temp
& PORT_CONNECT
) {
755 status
|= 1 << USB_PORT_FEAT_CONNECTION
;
756 // status may be from integrated TT
757 status
|= ehci_port_speed(ehci
, temp
);
760 status
|= 1 << USB_PORT_FEAT_ENABLE
;
761 if (temp
& (PORT_SUSPEND
|PORT_RESUME
))
762 status
|= 1 << USB_PORT_FEAT_SUSPEND
;
764 status
|= 1 << USB_PORT_FEAT_OVER_CURRENT
;
765 if (temp
& PORT_RESET
)
766 status
|= 1 << USB_PORT_FEAT_RESET
;
767 if (temp
& PORT_POWER
)
768 status
|= 1 << USB_PORT_FEAT_POWER
;
770 #ifndef VERBOSE_DEBUG
771 if (status
& ~0xffff) /* only if wPortChange is interesting */
773 dbg_port (ehci
, "GetStatus", wIndex
+ 1, temp
);
774 put_unaligned(cpu_to_le32 (status
), (__le32
*) buf
);
778 case C_HUB_LOCAL_POWER
:
779 case C_HUB_OVER_CURRENT
:
780 /* no hub-wide feature/status flags */
787 selector
= wIndex
>> 8;
789 if (!wIndex
|| wIndex
> ports
)
792 temp
= ehci_readl(ehci
, status_reg
);
793 if (temp
& PORT_OWNER
)
796 temp
&= ~PORT_RWC_BITS
;
798 case USB_PORT_FEAT_SUSPEND
:
799 if (ehci
->no_selective_suspend
)
801 if ((temp
& PORT_PE
) == 0
802 || (temp
& PORT_RESET
) != 0)
804 if (device_may_wakeup(&hcd
->self
.root_hub
->dev
))
805 temp
|= PORT_WAKE_BITS
;
806 ehci_writel(ehci
, temp
| PORT_SUSPEND
, status_reg
);
808 case USB_PORT_FEAT_POWER
:
809 if (HCS_PPC (ehci
->hcs_params
))
810 ehci_writel(ehci
, temp
| PORT_POWER
,
813 case USB_PORT_FEAT_RESET
:
814 if (temp
& PORT_RESUME
)
816 /* line status bits may report this as low speed,
817 * which can be fine if this root hub has a
818 * transaction translator built in.
820 if ((temp
& (PORT_PE
|PORT_CONNECT
)) == PORT_CONNECT
821 && !ehci_is_TDI(ehci
)
822 && PORT_USB11 (temp
)) {
824 "port %d low speed --> companion\n",
828 ehci_vdbg (ehci
, "port %d reset\n", wIndex
+ 1);
833 * caller must wait, then call GetPortStatus
834 * usb 2.0 spec says 50 ms resets on root
836 ehci
->reset_done
[wIndex
] = jiffies
837 + msecs_to_jiffies (50);
839 ehci_writel(ehci
, temp
, status_reg
);
842 /* For downstream facing ports (these): one hub port is put
843 * into test mode according to USB2 11.24.2.13, then the hub
844 * must be reset (which for root hub now means rmmod+modprobe,
845 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
846 * about the EHCI-specific stuff.
848 case USB_PORT_FEAT_TEST
:
849 if (!selector
|| selector
> 5)
853 temp
|= selector
<< 16;
854 ehci_writel(ehci
, temp
, status_reg
);
860 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted writes */
865 /* "stall" on error */
868 spin_unlock_irqrestore (&ehci
->lock
, flags
);
872 static void ehci_relinquish_port(struct usb_hcd
*hcd
, int portnum
)
874 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
876 if (ehci_is_TDI(ehci
))
878 set_owner(ehci
, --portnum
, PORT_OWNER
);