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 /* Ideally and we've got a real resume here, and no port's power
239 * was lost. (For PCI, that means Vaux was maintained.) But we
240 * could instead be restoring a swsusp snapshot -- so that BIOS was
241 * the last user of the controller, not reset/pm hardware keeping
242 * state we gave to it.
244 power_okay
= ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
245 ehci_dbg(ehci
, "resume root hub%s\n",
246 power_okay
? "" : " after power loss");
248 /* at least some APM implementations will try to deliver
249 * IRQs right away, so delay them until we're ready.
251 ehci_writel(ehci
, 0, &ehci
->regs
->intr_enable
);
253 /* re-init operational registers */
254 ehci_writel(ehci
, 0, &ehci
->regs
->segment
);
255 ehci_writel(ehci
, ehci
->periodic_dma
, &ehci
->regs
->frame_list
);
256 ehci_writel(ehci
, (u32
) ehci
->async
->qh_dma
, &ehci
->regs
->async_next
);
258 /* restore CMD_RUN, framelist size, and irq threshold */
259 ehci_writel(ehci
, ehci
->command
, &ehci
->regs
->command
);
261 /* Some controller/firmware combinations need a delay during which
262 * they set up the port statuses. See Bugzilla #8190. */
263 spin_unlock_irq(&ehci
->lock
);
265 spin_lock_irq(&ehci
->lock
);
267 /* manually resume the ports we suspended during bus_suspend() */
268 i
= HCS_N_PORTS (ehci
->hcs_params
);
270 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
271 temp
&= ~(PORT_RWC_BITS
| PORT_WAKE_BITS
);
272 if (test_bit(i
, &ehci
->bus_suspended
) &&
273 (temp
& PORT_SUSPEND
)) {
277 ehci_writel(ehci
, temp
, &ehci
->regs
->port_status
[i
]);
280 /* msleep for 20ms only if code is trying to resume port */
282 spin_unlock_irq(&ehci
->lock
);
284 spin_lock_irq(&ehci
->lock
);
287 i
= HCS_N_PORTS (ehci
->hcs_params
);
289 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
290 if (test_bit(i
, &ehci
->bus_suspended
) &&
291 (temp
& PORT_SUSPEND
)) {
292 temp
&= ~(PORT_RWC_BITS
| PORT_RESUME
);
293 ehci_writel(ehci
, temp
, &ehci
->regs
->port_status
[i
]);
294 ehci_vdbg (ehci
, "resumed port %d\n", i
+ 1);
297 (void) ehci_readl(ehci
, &ehci
->regs
->command
);
299 /* maybe re-activate the schedule(s) */
301 if (ehci
->async
->qh_next
.qh
)
303 if (ehci
->periodic_sched
)
306 ehci
->command
|= temp
;
307 ehci_writel(ehci
, ehci
->command
, &ehci
->regs
->command
);
310 ehci
->next_statechange
= jiffies
+ msecs_to_jiffies(5);
311 hcd
->state
= HC_STATE_RUNNING
;
313 /* Now we can safely re-enable irqs */
314 ehci_writel(ehci
, INTR_MASK
, &ehci
->regs
->intr_enable
);
316 spin_unlock_irq (&ehci
->lock
);
317 ehci_handover_companion_ports(ehci
);
323 #define ehci_bus_suspend NULL
324 #define ehci_bus_resume NULL
326 #endif /* CONFIG_PM */
328 /*-------------------------------------------------------------------------*/
330 /* Display the ports dedicated to the companion controller */
331 static ssize_t
show_companion(struct device
*dev
,
332 struct device_attribute
*attr
,
335 struct ehci_hcd
*ehci
;
336 int nports
, index
, n
;
337 int count
= PAGE_SIZE
;
340 ehci
= hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev
)));
341 nports
= HCS_N_PORTS(ehci
->hcs_params
);
343 for (index
= 0; index
< nports
; ++index
) {
344 if (test_bit(index
, &ehci
->companion_ports
)) {
345 n
= scnprintf(ptr
, count
, "%d\n", index
+ 1);
354 * Sets the owner of a port
356 static void set_owner(struct ehci_hcd
*ehci
, int portnum
, int new_owner
)
358 u32 __iomem
*status_reg
;
362 status_reg
= &ehci
->regs
->port_status
[portnum
];
365 * The controller won't set the OWNER bit if the port is
366 * enabled, so this loop will sometimes require at least two
367 * iterations: one to disable the port and one to set OWNER.
369 for (try = 4; try > 0; --try) {
370 spin_lock_irq(&ehci
->lock
);
371 port_status
= ehci_readl(ehci
, status_reg
);
372 if ((port_status
& PORT_OWNER
) == new_owner
373 || (port_status
& (PORT_OWNER
| PORT_CONNECT
))
377 port_status
^= PORT_OWNER
;
378 port_status
&= ~(PORT_PE
| PORT_RWC_BITS
);
379 ehci_writel(ehci
, port_status
, status_reg
);
381 spin_unlock_irq(&ehci
->lock
);
388 * Dedicate or undedicate a port to the companion controller.
389 * Syntax is "[-]portnum", where a leading '-' sign means
390 * return control of the port to the EHCI controller.
392 static ssize_t
store_companion(struct device
*dev
,
393 struct device_attribute
*attr
,
394 const char *buf
, size_t count
)
396 struct ehci_hcd
*ehci
;
397 int portnum
, new_owner
;
399 ehci
= hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev
)));
400 new_owner
= PORT_OWNER
; /* Owned by companion */
401 if (sscanf(buf
, "%d", &portnum
) != 1)
405 new_owner
= 0; /* Owned by EHCI */
407 if (portnum
<= 0 || portnum
> HCS_N_PORTS(ehci
->hcs_params
))
411 set_bit(portnum
, &ehci
->companion_ports
);
413 clear_bit(portnum
, &ehci
->companion_ports
);
414 set_owner(ehci
, portnum
, new_owner
);
417 static DEVICE_ATTR(companion
, 0644, show_companion
, store_companion
);
419 static inline void create_companion_file(struct ehci_hcd
*ehci
)
423 /* with integrated TT there is no companion! */
424 if (!ehci_is_TDI(ehci
))
425 i
= device_create_file(ehci_to_hcd(ehci
)->self
.controller
,
426 &dev_attr_companion
);
429 static inline void remove_companion_file(struct ehci_hcd
*ehci
)
431 /* with integrated TT there is no companion! */
432 if (!ehci_is_TDI(ehci
))
433 device_remove_file(ehci_to_hcd(ehci
)->self
.controller
,
434 &dev_attr_companion
);
438 /*-------------------------------------------------------------------------*/
440 static int check_reset_complete (
441 struct ehci_hcd
*ehci
,
443 u32 __iomem
*status_reg
,
446 if (!(port_status
& PORT_CONNECT
))
449 /* if reset finished and it's still not enabled -- handoff */
450 if (!(port_status
& PORT_PE
)) {
452 /* with integrated TT, there's nobody to hand it to! */
453 if (ehci_is_TDI(ehci
)) {
455 "Failed to enable port %d on root hub TT\n",
460 ehci_dbg (ehci
, "port %d full speed --> companion\n",
463 // what happens if HCS_N_CC(params) == 0 ?
464 port_status
|= PORT_OWNER
;
465 port_status
&= ~PORT_RWC_BITS
;
466 ehci_writel(ehci
, port_status
, status_reg
);
468 /* ensure 440EPX ohci controller state is operational */
469 if (ehci
->has_amcc_usb23
)
470 set_ohci_hcfs(ehci
, 1);
472 ehci_dbg (ehci
, "port %d high speed\n", index
+ 1);
473 /* ensure 440EPx ohci controller state is suspended */
474 if (ehci
->has_amcc_usb23
)
475 set_ohci_hcfs(ehci
, 0);
481 /*-------------------------------------------------------------------------*/
484 /* build "status change" packet (one or two bytes) from HC registers */
487 ehci_hub_status_data (struct usb_hcd
*hcd
, char *buf
)
489 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
490 u32 temp
, status
= 0;
492 int ports
, i
, retval
= 1;
495 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
496 if (!HC_IS_RUNNING(hcd
->state
))
499 /* init status to no-changes */
501 ports
= HCS_N_PORTS (ehci
->hcs_params
);
507 /* Some boards (mostly VIA?) report bogus overcurrent indications,
508 * causing massive log spam unless we completely ignore them. It
509 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
510 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
511 * PORT_POWER; that's surprising, but maybe within-spec.
514 mask
= PORT_CSC
| PORT_PEC
| PORT_OCC
;
516 mask
= PORT_CSC
| PORT_PEC
;
517 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
519 /* no hub change reports (bit 0) for now (power, ...) */
521 /* port N changes (bit N)? */
522 spin_lock_irqsave (&ehci
->lock
, flags
);
523 for (i
= 0; i
< ports
; i
++) {
524 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
527 * Return status information even for ports with OWNER set.
528 * Otherwise khubd wouldn't see the disconnect event when a
529 * high-speed device is switched over to the companion
530 * controller by the user.
533 if ((temp
& mask
) != 0 || test_bit(i
, &ehci
->port_c_suspend
)
534 || (ehci
->reset_done
[i
] && time_after_eq(
535 jiffies
, ehci
->reset_done
[i
]))) {
537 buf
[0] |= 1 << (i
+ 1);
539 buf
[1] |= 1 << (i
- 7);
543 /* FIXME autosuspend idle root hubs */
544 spin_unlock_irqrestore (&ehci
->lock
, flags
);
545 return status
? retval
: 0;
548 /*-------------------------------------------------------------------------*/
551 ehci_hub_descriptor (
552 struct ehci_hcd
*ehci
,
553 struct usb_hub_descriptor
*desc
555 int ports
= HCS_N_PORTS (ehci
->hcs_params
);
558 desc
->bDescriptorType
= 0x29;
559 desc
->bPwrOn2PwrGood
= 10; /* ehci 1.0, 2.3.9 says 20ms max */
560 desc
->bHubContrCurrent
= 0;
562 desc
->bNbrPorts
= ports
;
563 temp
= 1 + (ports
/ 8);
564 desc
->bDescLength
= 7 + 2 * temp
;
566 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
567 memset (&desc
->bitmap
[0], 0, temp
);
568 memset (&desc
->bitmap
[temp
], 0xff, temp
);
570 temp
= 0x0008; /* per-port overcurrent reporting */
571 if (HCS_PPC (ehci
->hcs_params
))
572 temp
|= 0x0001; /* per-port power control */
574 temp
|= 0x0002; /* no power switching */
576 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
577 if (HCS_INDICATOR (ehci
->hcs_params
))
578 temp
|= 0x0080; /* per-port indicators (LEDs) */
580 desc
->wHubCharacteristics
= cpu_to_le16(temp
);
583 /*-------------------------------------------------------------------------*/
585 static int ehci_hub_control (
593 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
594 int ports
= HCS_N_PORTS (ehci
->hcs_params
);
595 u32 __iomem
*status_reg
= &ehci
->regs
->port_status
[
596 (wIndex
& 0xff) - 1];
597 u32 __iomem
*hostpc_reg
= NULL
;
598 u32 temp
, temp1
, status
;
604 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
605 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
606 * (track current state ourselves) ... blink for diagnostics,
607 * power, "this is the one", etc. EHCI spec supports this.
610 if (ehci
->has_hostpc
)
611 hostpc_reg
= (u32 __iomem
*)((u8
*)ehci
->regs
612 + HOSTPC0
+ 4 * ((wIndex
& 0xff) - 1));
613 spin_lock_irqsave (&ehci
->lock
, flags
);
615 case ClearHubFeature
:
617 case C_HUB_LOCAL_POWER
:
618 case C_HUB_OVER_CURRENT
:
619 /* no hub-wide feature/status flags */
625 case ClearPortFeature
:
626 if (!wIndex
|| wIndex
> ports
)
629 temp
= ehci_readl(ehci
, status_reg
);
632 * Even if OWNER is set, so the port is owned by the
633 * companion controller, khubd needs to be able to clear
634 * the port-change status bits (especially
635 * USB_PORT_FEAT_C_CONNECTION).
639 case USB_PORT_FEAT_ENABLE
:
640 ehci_writel(ehci
, temp
& ~PORT_PE
, status_reg
);
642 case USB_PORT_FEAT_C_ENABLE
:
643 ehci_writel(ehci
, (temp
& ~PORT_RWC_BITS
) | PORT_PEC
,
646 case USB_PORT_FEAT_SUSPEND
:
647 if (temp
& PORT_RESET
)
649 if (ehci
->no_selective_suspend
)
651 if (temp
& PORT_SUSPEND
) {
652 if ((temp
& PORT_PE
) == 0)
654 /* resume signaling for 20 msec */
655 temp
&= ~(PORT_RWC_BITS
| PORT_WAKE_BITS
);
656 ehci_writel(ehci
, temp
| PORT_RESUME
,
658 ehci
->reset_done
[wIndex
] = jiffies
659 + msecs_to_jiffies (20);
662 case USB_PORT_FEAT_C_SUSPEND
:
663 clear_bit(wIndex
, &ehci
->port_c_suspend
);
665 case USB_PORT_FEAT_POWER
:
666 if (HCS_PPC (ehci
->hcs_params
))
668 temp
& ~(PORT_RWC_BITS
| PORT_POWER
),
671 case USB_PORT_FEAT_C_CONNECTION
:
672 ehci_writel(ehci
, (temp
& ~PORT_RWC_BITS
) | PORT_CSC
,
675 case USB_PORT_FEAT_C_OVER_CURRENT
:
676 ehci_writel(ehci
, (temp
& ~PORT_RWC_BITS
) | PORT_OCC
,
679 case USB_PORT_FEAT_C_RESET
:
680 /* GetPortStatus clears reset */
685 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted write */
687 case GetHubDescriptor
:
688 ehci_hub_descriptor (ehci
, (struct usb_hub_descriptor
*)
692 /* no hub-wide feature/status flags */
694 //cpu_to_le32s ((u32 *) buf);
697 if (!wIndex
|| wIndex
> ports
)
701 temp
= ehci_readl(ehci
, status_reg
);
705 status
|= 1 << USB_PORT_FEAT_C_CONNECTION
;
707 status
|= 1 << USB_PORT_FEAT_C_ENABLE
;
709 if ((temp
& PORT_OCC
) && !ignore_oc
){
710 status
|= 1 << USB_PORT_FEAT_C_OVER_CURRENT
;
713 * Hubs should disable port power on over-current.
714 * However, not all EHCI implementations do this
715 * automatically, even if they _do_ support per-port
716 * power switching; they're allowed to just limit the
717 * current. khubd will turn the power back on.
719 if (HCS_PPC (ehci
->hcs_params
)){
721 temp
& ~(PORT_RWC_BITS
| PORT_POWER
),
726 /* whoever resumes must GetPortStatus to complete it!! */
727 if (temp
& PORT_RESUME
) {
729 /* Remote Wakeup received? */
730 if (!ehci
->reset_done
[wIndex
]) {
731 /* resume signaling for 20 msec */
732 ehci
->reset_done
[wIndex
] = jiffies
733 + msecs_to_jiffies(20);
734 /* check the port again */
735 mod_timer(&ehci_to_hcd(ehci
)->rh_timer
,
736 ehci
->reset_done
[wIndex
]);
739 /* resume completed? */
740 else if (time_after_eq(jiffies
,
741 ehci
->reset_done
[wIndex
])) {
742 clear_bit(wIndex
, &ehci
->suspended_ports
);
743 set_bit(wIndex
, &ehci
->port_c_suspend
);
744 ehci
->reset_done
[wIndex
] = 0;
746 /* stop resume signaling */
747 temp
= ehci_readl(ehci
, status_reg
);
749 temp
& ~(PORT_RWC_BITS
| PORT_RESUME
),
751 retval
= handshake(ehci
, status_reg
,
752 PORT_RESUME
, 0, 2000 /* 2msec */);
755 "port %d resume error %d\n",
759 temp
&= ~(PORT_SUSPEND
|PORT_RESUME
|(3<<10));
763 /* whoever resets must GetPortStatus to complete it!! */
764 if ((temp
& PORT_RESET
)
765 && time_after_eq(jiffies
,
766 ehci
->reset_done
[wIndex
])) {
767 status
|= 1 << USB_PORT_FEAT_C_RESET
;
768 ehci
->reset_done
[wIndex
] = 0;
770 /* force reset to complete */
771 ehci_writel(ehci
, temp
& ~(PORT_RWC_BITS
| PORT_RESET
),
773 /* REVISIT: some hardware needs 550+ usec to clear
774 * this bit; seems too long to spin routinely...
776 retval
= handshake(ehci
, status_reg
,
779 ehci_err (ehci
, "port %d reset error %d\n",
784 /* see what we found out */
785 temp
= check_reset_complete (ehci
, wIndex
, status_reg
,
786 ehci_readl(ehci
, status_reg
));
789 if (!(temp
& (PORT_RESUME
|PORT_RESET
)))
790 ehci
->reset_done
[wIndex
] = 0;
792 /* transfer dedicated ports to the companion hc */
793 if ((temp
& PORT_CONNECT
) &&
794 test_bit(wIndex
, &ehci
->companion_ports
)) {
795 temp
&= ~PORT_RWC_BITS
;
797 ehci_writel(ehci
, temp
, status_reg
);
798 ehci_dbg(ehci
, "port %d --> companion\n", wIndex
+ 1);
799 temp
= ehci_readl(ehci
, status_reg
);
803 * Even if OWNER is set, there's no harm letting khubd
804 * see the wPortStatus values (they should all be 0 except
805 * for PORT_POWER anyway).
808 if (temp
& PORT_CONNECT
) {
809 status
|= 1 << USB_PORT_FEAT_CONNECTION
;
810 // status may be from integrated TT
811 if (ehci
->has_hostpc
) {
812 temp1
= ehci_readl(ehci
, hostpc_reg
);
813 status
|= ehci_port_speed(ehci
, temp1
);
815 status
|= ehci_port_speed(ehci
, temp
);
818 status
|= 1 << USB_PORT_FEAT_ENABLE
;
820 /* maybe the port was unsuspended without our knowledge */
821 if (temp
& (PORT_SUSPEND
|PORT_RESUME
)) {
822 status
|= 1 << USB_PORT_FEAT_SUSPEND
;
823 } else if (test_bit(wIndex
, &ehci
->suspended_ports
)) {
824 clear_bit(wIndex
, &ehci
->suspended_ports
);
825 ehci
->reset_done
[wIndex
] = 0;
827 set_bit(wIndex
, &ehci
->port_c_suspend
);
831 status
|= 1 << USB_PORT_FEAT_OVER_CURRENT
;
832 if (temp
& PORT_RESET
)
833 status
|= 1 << USB_PORT_FEAT_RESET
;
834 if (temp
& PORT_POWER
)
835 status
|= 1 << USB_PORT_FEAT_POWER
;
836 if (test_bit(wIndex
, &ehci
->port_c_suspend
))
837 status
|= 1 << USB_PORT_FEAT_C_SUSPEND
;
839 #ifndef VERBOSE_DEBUG
840 if (status
& ~0xffff) /* only if wPortChange is interesting */
842 dbg_port (ehci
, "GetStatus", wIndex
+ 1, temp
);
843 put_unaligned_le32(status
, buf
);
847 case C_HUB_LOCAL_POWER
:
848 case C_HUB_OVER_CURRENT
:
849 /* no hub-wide feature/status flags */
856 selector
= wIndex
>> 8;
858 if (!wIndex
|| wIndex
> ports
)
861 temp
= ehci_readl(ehci
, status_reg
);
862 if (temp
& PORT_OWNER
)
865 temp
&= ~PORT_RWC_BITS
;
867 case USB_PORT_FEAT_SUSPEND
:
868 if (ehci
->no_selective_suspend
)
870 if ((temp
& PORT_PE
) == 0
871 || (temp
& PORT_RESET
) != 0)
873 ehci_writel(ehci
, temp
| PORT_SUSPEND
, status_reg
);
874 /* After above check the port must be connected.
875 * Set appropriate bit thus could put phy into low power
876 * mode if we have hostpc feature
879 temp
&= ~PORT_WKCONN_E
;
880 temp
|= (PORT_WKDISC_E
| PORT_WKOC_E
);
881 ehci_writel(ehci
, temp
| PORT_SUSPEND
,
883 msleep(5);/* 5ms for HCD enter low pwr mode */
884 temp1
= ehci_readl(ehci
, hostpc_reg
);
885 ehci_writel(ehci
, temp1
| HOSTPC_PHCD
,
887 temp1
= ehci_readl(ehci
, hostpc_reg
);
888 ehci_dbg(ehci
, "Port%d phy low pwr mode %s\n",
889 wIndex
, (temp1
& HOSTPC_PHCD
) ?
890 "succeeded" : "failed");
892 set_bit(wIndex
, &ehci
->suspended_ports
);
894 case USB_PORT_FEAT_POWER
:
895 if (HCS_PPC (ehci
->hcs_params
))
896 ehci_writel(ehci
, temp
| PORT_POWER
,
899 case USB_PORT_FEAT_RESET
:
900 if (temp
& PORT_RESUME
)
902 /* line status bits may report this as low speed,
903 * which can be fine if this root hub has a
904 * transaction translator built in.
906 if ((temp
& (PORT_PE
|PORT_CONNECT
)) == PORT_CONNECT
907 && !ehci_is_TDI(ehci
)
908 && PORT_USB11 (temp
)) {
910 "port %d low speed --> companion\n",
914 ehci_vdbg (ehci
, "port %d reset\n", wIndex
+ 1);
919 * caller must wait, then call GetPortStatus
920 * usb 2.0 spec says 50 ms resets on root
922 ehci
->reset_done
[wIndex
] = jiffies
923 + msecs_to_jiffies (50);
925 ehci_writel(ehci
, temp
, status_reg
);
928 /* For downstream facing ports (these): one hub port is put
929 * into test mode according to USB2 11.24.2.13, then the hub
930 * must be reset (which for root hub now means rmmod+modprobe,
931 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
932 * about the EHCI-specific stuff.
934 case USB_PORT_FEAT_TEST
:
935 if (!selector
|| selector
> 5)
939 temp
|= selector
<< 16;
940 ehci_writel(ehci
, temp
, status_reg
);
946 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted writes */
951 /* "stall" on error */
954 spin_unlock_irqrestore (&ehci
->lock
, flags
);
958 static void ehci_relinquish_port(struct usb_hcd
*hcd
, int portnum
)
960 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
962 if (ehci_is_TDI(ehci
))
964 set_owner(ehci
, --portnum
, PORT_OWNER
);
967 static int ehci_port_handed_over(struct usb_hcd
*hcd
, int portnum
)
969 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
972 if (ehci_is_TDI(ehci
))
974 reg
= &ehci
->regs
->port_status
[portnum
- 1];
975 return ehci_readl(ehci
, reg
) & PORT_OWNER
;