2 * Copyright (C) 2001-2004 by David Brownell
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /* this file is part of ehci-hcd.c */
21 /*-------------------------------------------------------------------------*/
24 * EHCI Root Hub ... the nonsharable stuff
26 * Registers don't need cpu_to_le32, that happens transparently
29 /*-------------------------------------------------------------------------*/
30 #include <linux/usb/otg.h>
32 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
36 static int ehci_hub_control(
45 /* After a power loss, ports that were owned by the companion must be
46 * reset so that the companion can still own them.
48 static void ehci_handover_companion_ports(struct ehci_hcd
*ehci
)
54 struct usb_hcd
*hcd
= ehci_to_hcd(ehci
);
56 if (!ehci
->owned_ports
)
59 /* Give the connections some time to appear */
62 port
= HCS_N_PORTS(ehci
->hcs_params
);
64 if (test_bit(port
, &ehci
->owned_ports
)) {
65 reg
= &ehci
->regs
->port_status
[port
];
66 status
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
68 /* Port already owned by companion? */
69 if (status
& PORT_OWNER
)
70 clear_bit(port
, &ehci
->owned_ports
);
71 else if (test_bit(port
, &ehci
->companion_ports
))
72 ehci_writel(ehci
, status
& ~PORT_PE
, reg
);
74 ehci_hub_control(hcd
, SetPortFeature
,
75 USB_PORT_FEAT_RESET
, port
+ 1,
80 if (!ehci
->owned_ports
)
82 msleep(90); /* Wait for resets to complete */
84 port
= HCS_N_PORTS(ehci
->hcs_params
);
86 if (test_bit(port
, &ehci
->owned_ports
)) {
87 ehci_hub_control(hcd
, GetPortStatus
,
89 (char *) &buf
, sizeof(buf
));
91 /* The companion should now own the port,
92 * but if something went wrong the port must not
95 reg
= &ehci
->regs
->port_status
[port
];
96 status
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
97 if (status
& PORT_OWNER
)
98 ehci_writel(ehci
, status
| PORT_CSC
, reg
);
100 ehci_dbg(ehci
, "failed handover port %d: %x\n",
102 ehci_writel(ehci
, status
& ~PORT_PE
, reg
);
107 ehci
->owned_ports
= 0;
110 static int __maybe_unused
ehci_port_change(struct ehci_hcd
*ehci
)
112 int i
= HCS_N_PORTS(ehci
->hcs_params
);
114 /* First check if the controller indicates a change event */
116 if (ehci_readl(ehci
, &ehci
->regs
->status
) & STS_PCD
)
120 * Not all controllers appear to update this while going from D3 to D0,
121 * so check the individual port status registers as well
125 if (ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]) & PORT_CSC
)
131 static __maybe_unused
void ehci_adjust_port_wakeup_flags(struct ehci_hcd
*ehci
,
132 bool suspending
, bool do_wakeup
)
138 /* If remote wakeup is enabled for the root hub but disabled
139 * for the controller, we must adjust all the port wakeup flags
140 * when the controller is suspended or resumed. In all other
141 * cases they don't need to be changed.
143 if (!ehci_to_hcd(ehci
)->self
.root_hub
->do_remote_wakeup
|| do_wakeup
)
146 spin_lock_irqsave(&ehci
->lock
, flags
);
148 /* clear phy low-power mode before changing wakeup flags */
149 if (ehci
->has_hostpc
) {
150 port
= HCS_N_PORTS(ehci
->hcs_params
);
152 u32 __iomem
*hostpc_reg
;
154 hostpc_reg
= (u32 __iomem
*)((u8
*) ehci
->regs
155 + HOSTPC0
+ 4 * port
);
156 temp
= ehci_readl(ehci
, hostpc_reg
);
157 ehci_writel(ehci
, temp
& ~HOSTPC_PHCD
, hostpc_reg
);
159 spin_unlock_irqrestore(&ehci
->lock
, flags
);
161 spin_lock_irqsave(&ehci
->lock
, flags
);
164 port
= HCS_N_PORTS(ehci
->hcs_params
);
166 u32 __iomem
*reg
= &ehci
->regs
->port_status
[port
];
167 u32 t1
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
168 u32 t2
= t1
& ~PORT_WAKE_BITS
;
170 /* If we are suspending the controller, clear the flags.
171 * If we are resuming the controller, set the wakeup flags.
174 if (t1
& PORT_CONNECT
)
175 t2
|= PORT_WKOC_E
| PORT_WKDISC_E
;
177 t2
|= PORT_WKOC_E
| PORT_WKCONN_E
;
179 ehci_vdbg(ehci
, "port %d, %08x -> %08x\n",
181 ehci_writel(ehci
, t2
, reg
);
184 /* enter phy low-power mode again */
185 if (ehci
->has_hostpc
) {
186 port
= HCS_N_PORTS(ehci
->hcs_params
);
188 u32 __iomem
*hostpc_reg
;
190 hostpc_reg
= (u32 __iomem
*)((u8
*) ehci
->regs
191 + HOSTPC0
+ 4 * port
);
192 temp
= ehci_readl(ehci
, hostpc_reg
);
193 ehci_writel(ehci
, temp
| HOSTPC_PHCD
, hostpc_reg
);
197 /* Does the root hub have a port wakeup pending? */
198 if (!suspending
&& ehci_port_change(ehci
))
199 usb_hcd_resume_root_hub(ehci_to_hcd(ehci
));
201 spin_unlock_irqrestore(&ehci
->lock
, flags
);
204 static int ehci_bus_suspend (struct usb_hcd
*hcd
)
206 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
211 ehci_dbg(ehci
, "suspend root hub\n");
213 if (time_before (jiffies
, ehci
->next_statechange
))
215 del_timer_sync(&ehci
->watchdog
);
216 del_timer_sync(&ehci
->iaa_watchdog
);
218 spin_lock_irq (&ehci
->lock
);
220 /* Once the controller is stopped, port resumes that are already
221 * in progress won't complete. Hence if remote wakeup is enabled
222 * for the root hub and any ports are in the middle of a resume or
223 * remote wakeup, we must fail the suspend.
225 if (hcd
->self
.root_hub
->do_remote_wakeup
) {
226 if (ehci
->resuming_ports
) {
227 spin_unlock_irq(&ehci
->lock
);
228 ehci_dbg(ehci
, "suspend failed because a port is resuming\n");
233 /* stop schedules, clean any completed work */
234 if (ehci
->rh_state
== EHCI_RH_RUNNING
)
238 /* Unlike other USB host controller types, EHCI doesn't have
239 * any notion of "global" or bus-wide suspend. The driver has
240 * to manually suspend all the active unsuspended ports, and
241 * then manually resume them in the bus_resume() routine.
243 ehci
->bus_suspended
= 0;
244 ehci
->owned_ports
= 0;
246 port
= HCS_N_PORTS(ehci
->hcs_params
);
248 u32 __iomem
*reg
= &ehci
->regs
->port_status
[port
];
249 u32 t1
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
250 u32 t2
= t1
& ~PORT_WAKE_BITS
;
252 /* keep track of which ports we suspend */
254 set_bit(port
, &ehci
->owned_ports
);
255 else if ((t1
& PORT_PE
) && !(t1
& PORT_SUSPEND
)) {
257 set_bit(port
, &ehci
->bus_suspended
);
260 /* enable remote wakeup on all ports, if told to do so */
261 if (hcd
->self
.root_hub
->do_remote_wakeup
) {
262 /* only enable appropriate wake bits, otherwise the
263 * hardware can not go phy low power mode. If a race
264 * condition happens here(connection change during bits
265 * set), the port change detection will finally fix it.
267 if (t1
& PORT_CONNECT
)
268 t2
|= PORT_WKOC_E
| PORT_WKDISC_E
;
270 t2
|= PORT_WKOC_E
| PORT_WKCONN_E
;
274 ehci_vdbg (ehci
, "port %d, %08x -> %08x\n",
276 ehci_writel(ehci
, t2
, reg
);
281 if (changed
&& ehci
->has_hostpc
) {
282 spin_unlock_irq(&ehci
->lock
);
283 msleep(5); /* 5 ms for HCD to enter low-power mode */
284 spin_lock_irq(&ehci
->lock
);
286 port
= HCS_N_PORTS(ehci
->hcs_params
);
288 u32 __iomem
*hostpc_reg
;
291 hostpc_reg
= (u32 __iomem
*)((u8
*) ehci
->regs
292 + HOSTPC0
+ 4 * port
);
293 t3
= ehci_readl(ehci
, hostpc_reg
);
294 ehci_writel(ehci
, t3
| HOSTPC_PHCD
, hostpc_reg
);
295 t3
= ehci_readl(ehci
, hostpc_reg
);
296 ehci_dbg(ehci
, "Port %d phy low-power mode %s\n",
297 port
, (t3
& HOSTPC_PHCD
) ?
298 "succeeded" : "failed");
302 /* Apparently some devices need a >= 1-uframe delay here */
303 if (ehci
->bus_suspended
)
306 /* turn off now-idle HC */
308 ehci
->rh_state
= EHCI_RH_SUSPENDED
;
311 end_unlink_async(ehci
);
313 /* allow remote wakeup */
315 if (!hcd
->self
.root_hub
->do_remote_wakeup
)
317 ehci_writel(ehci
, mask
, &ehci
->regs
->intr_enable
);
318 ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
320 ehci
->next_statechange
= jiffies
+ msecs_to_jiffies(10);
321 spin_unlock_irq (&ehci
->lock
);
323 /* ehci_work() may have re-enabled the watchdog timer, which we do not
324 * want, and so we must delete any pending watchdog timer events.
326 del_timer_sync(&ehci
->watchdog
);
331 /* caller has locked the root hub, and should reset/reinit on error */
332 static int ehci_bus_resume (struct usb_hcd
*hcd
)
334 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
338 unsigned long resume_needed
= 0;
340 if (time_before (jiffies
, ehci
->next_statechange
))
342 spin_lock_irq (&ehci
->lock
);
343 if (!HCD_HW_ACCESSIBLE(hcd
)) {
344 spin_unlock_irq(&ehci
->lock
);
348 if (unlikely(ehci
->debug
)) {
349 if (!dbgp_reset_prep())
352 dbgp_external_startup();
355 /* Ideally and we've got a real resume here, and no port's power
356 * was lost. (For PCI, that means Vaux was maintained.) But we
357 * could instead be restoring a swsusp snapshot -- so that BIOS was
358 * the last user of the controller, not reset/pm hardware keeping
359 * state we gave to it.
361 power_okay
= ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
362 ehci_dbg(ehci
, "resume root hub%s\n",
363 power_okay
? "" : " after power loss");
365 /* at least some APM implementations will try to deliver
366 * IRQs right away, so delay them until we're ready.
368 ehci_writel(ehci
, 0, &ehci
->regs
->intr_enable
);
370 /* re-init operational registers */
371 ehci_writel(ehci
, 0, &ehci
->regs
->segment
);
372 ehci_writel(ehci
, ehci
->periodic_dma
, &ehci
->regs
->frame_list
);
373 ehci_writel(ehci
, (u32
) ehci
->async
->qh_dma
, &ehci
->regs
->async_next
);
375 /* restore CMD_RUN, framelist size, and irq threshold */
376 ehci
->command
|= CMD_RUN
;
377 ehci_writel(ehci
, ehci
->command
, &ehci
->regs
->command
);
378 ehci
->rh_state
= EHCI_RH_RUNNING
;
380 /* Some controller/firmware combinations need a delay during which
381 * they set up the port statuses. See Bugzilla #8190. */
382 spin_unlock_irq(&ehci
->lock
);
384 spin_lock_irq(&ehci
->lock
);
386 /* clear phy low-power mode before resume */
387 if (ehci
->bus_suspended
&& ehci
->has_hostpc
) {
388 i
= HCS_N_PORTS(ehci
->hcs_params
);
390 if (test_bit(i
, &ehci
->bus_suspended
)) {
391 u32 __iomem
*hostpc_reg
;
393 hostpc_reg
= (u32 __iomem
*)((u8
*) ehci
->regs
395 temp
= ehci_readl(ehci
, hostpc_reg
);
396 ehci_writel(ehci
, temp
& ~HOSTPC_PHCD
,
400 spin_unlock_irq(&ehci
->lock
);
402 spin_lock_irq(&ehci
->lock
);
405 /* manually resume the ports we suspended during bus_suspend() */
406 i
= HCS_N_PORTS (ehci
->hcs_params
);
408 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
409 temp
&= ~(PORT_RWC_BITS
| PORT_WAKE_BITS
);
410 if (test_bit(i
, &ehci
->bus_suspended
) &&
411 (temp
& PORT_SUSPEND
)) {
413 set_bit(i
, &resume_needed
);
415 ehci_writel(ehci
, temp
, &ehci
->regs
->port_status
[i
]);
418 /* msleep for 20ms only if code is trying to resume port */
420 spin_unlock_irq(&ehci
->lock
);
422 spin_lock_irq(&ehci
->lock
);
425 i
= HCS_N_PORTS (ehci
->hcs_params
);
427 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
428 if (test_bit(i
, &resume_needed
)) {
429 temp
&= ~(PORT_RWC_BITS
| PORT_RESUME
);
430 ehci_writel(ehci
, temp
, &ehci
->regs
->port_status
[i
]);
431 ehci_vdbg (ehci
, "resumed port %d\n", i
+ 1);
434 (void) ehci_readl(ehci
, &ehci
->regs
->command
);
436 /* maybe re-activate the schedule(s) */
438 if (ehci
->async
->qh_next
.qh
)
440 if (ehci
->periodic_sched
)
443 ehci
->command
|= temp
;
444 ehci_writel(ehci
, ehci
->command
, &ehci
->regs
->command
);
447 ehci
->next_statechange
= jiffies
+ msecs_to_jiffies(5);
449 /* Now we can safely re-enable irqs */
450 ehci_writel(ehci
, INTR_MASK
, &ehci
->regs
->intr_enable
);
452 spin_unlock_irq (&ehci
->lock
);
453 ehci_handover_companion_ports(ehci
);
459 #define ehci_bus_suspend NULL
460 #define ehci_bus_resume NULL
462 #endif /* CONFIG_PM */
464 /*-------------------------------------------------------------------------*/
467 * Sets the owner of a port
469 static void set_owner(struct ehci_hcd
*ehci
, int portnum
, int new_owner
)
471 u32 __iomem
*status_reg
;
475 status_reg
= &ehci
->regs
->port_status
[portnum
];
478 * The controller won't set the OWNER bit if the port is
479 * enabled, so this loop will sometimes require at least two
480 * iterations: one to disable the port and one to set OWNER.
482 for (try = 4; try > 0; --try) {
483 spin_lock_irq(&ehci
->lock
);
484 port_status
= ehci_readl(ehci
, status_reg
);
485 if ((port_status
& PORT_OWNER
) == new_owner
486 || (port_status
& (PORT_OWNER
| PORT_CONNECT
))
490 port_status
^= PORT_OWNER
;
491 port_status
&= ~(PORT_PE
| PORT_RWC_BITS
);
492 ehci_writel(ehci
, port_status
, status_reg
);
494 spin_unlock_irq(&ehci
->lock
);
500 /*-------------------------------------------------------------------------*/
502 static int check_reset_complete (
503 struct ehci_hcd
*ehci
,
505 u32 __iomem
*status_reg
,
508 if (!(port_status
& PORT_CONNECT
))
511 /* if reset finished and it's still not enabled -- handoff */
512 if (!(port_status
& PORT_PE
)) {
514 /* with integrated TT, there's nobody to hand it to! */
515 if (ehci_is_TDI(ehci
)) {
517 "Failed to enable port %d on root hub TT\n",
522 ehci_dbg (ehci
, "port %d full speed --> companion\n",
525 // what happens if HCS_N_CC(params) == 0 ?
526 port_status
|= PORT_OWNER
;
527 port_status
&= ~PORT_RWC_BITS
;
528 ehci_writel(ehci
, port_status
, status_reg
);
530 /* ensure 440EPX ohci controller state is operational */
531 if (ehci
->has_amcc_usb23
)
532 set_ohci_hcfs(ehci
, 1);
534 ehci_dbg(ehci
, "port %d reset complete, port enabled\n",
536 /* ensure 440EPx ohci controller state is suspended */
537 if (ehci
->has_amcc_usb23
)
538 set_ohci_hcfs(ehci
, 0);
544 /*-------------------------------------------------------------------------*/
547 /* build "status change" packet (one or two bytes) from HC registers */
550 ehci_hub_status_data (struct usb_hcd
*hcd
, char *buf
)
552 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
555 int ports
, i
, retval
= 1;
559 /* init status to no-changes */
561 ports
= HCS_N_PORTS (ehci
->hcs_params
);
567 /* Inform the core about resumes-in-progress by returning
568 * a non-zero value even if there are no status changes.
570 status
= ehci
->resuming_ports
;
572 /* Some boards (mostly VIA?) report bogus overcurrent indications,
573 * causing massive log spam unless we completely ignore them. It
574 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
575 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
576 * PORT_POWER; that's surprising, but maybe within-spec.
579 mask
= PORT_CSC
| PORT_PEC
| PORT_OCC
;
581 mask
= PORT_CSC
| PORT_PEC
;
582 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
584 /* no hub change reports (bit 0) for now (power, ...) */
586 /* port N changes (bit N)? */
587 spin_lock_irqsave (&ehci
->lock
, flags
);
589 /* get per-port change detect bits */
591 ppcd
= ehci_readl(ehci
, &ehci
->regs
->status
) >> 16;
593 for (i
= 0; i
< ports
; i
++) {
594 /* leverage per-port change bits feature */
595 if (ehci
->has_ppcd
&& !(ppcd
& (1 << i
)))
597 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
600 * Return status information even for ports with OWNER set.
601 * Otherwise khubd wouldn't see the disconnect event when a
602 * high-speed device is switched over to the companion
603 * controller by the user.
606 if ((temp
& mask
) != 0 || test_bit(i
, &ehci
->port_c_suspend
)
607 || (ehci
->reset_done
[i
] && time_after_eq(
608 jiffies
, ehci
->reset_done
[i
]))) {
610 buf
[0] |= 1 << (i
+ 1);
612 buf
[1] |= 1 << (i
- 7);
616 /* FIXME autosuspend idle root hubs */
617 spin_unlock_irqrestore (&ehci
->lock
, flags
);
618 return status
? retval
: 0;
621 /*-------------------------------------------------------------------------*/
624 ehci_hub_descriptor (
625 struct ehci_hcd
*ehci
,
626 struct usb_hub_descriptor
*desc
628 int ports
= HCS_N_PORTS (ehci
->hcs_params
);
631 desc
->bDescriptorType
= 0x29;
632 desc
->bPwrOn2PwrGood
= 10; /* ehci 1.0, 2.3.9 says 20ms max */
633 desc
->bHubContrCurrent
= 0;
635 desc
->bNbrPorts
= ports
;
636 temp
= 1 + (ports
/ 8);
637 desc
->bDescLength
= 7 + 2 * temp
;
639 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
640 memset(&desc
->u
.hs
.DeviceRemovable
[0], 0, temp
);
641 memset(&desc
->u
.hs
.DeviceRemovable
[temp
], 0xff, temp
);
643 temp
= 0x0008; /* per-port overcurrent reporting */
644 if (HCS_PPC (ehci
->hcs_params
))
645 temp
|= 0x0001; /* per-port power control */
647 temp
|= 0x0002; /* no power switching */
649 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
650 if (HCS_INDICATOR (ehci
->hcs_params
))
651 temp
|= 0x0080; /* per-port indicators (LEDs) */
653 desc
->wHubCharacteristics
= cpu_to_le16(temp
);
656 /*-------------------------------------------------------------------------*/
658 static int ehci_hub_control (
666 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
667 int ports
= HCS_N_PORTS (ehci
->hcs_params
);
668 u32 __iomem
*status_reg
= &ehci
->regs
->port_status
[
669 (wIndex
& 0xff) - 1];
670 u32 __iomem
*hostpc_reg
= NULL
;
671 u32 temp
, temp1
, status
;
677 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
678 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
679 * (track current state ourselves) ... blink for diagnostics,
680 * power, "this is the one", etc. EHCI spec supports this.
683 if (ehci
->has_hostpc
)
684 hostpc_reg
= (u32 __iomem
*)((u8
*)ehci
->regs
685 + HOSTPC0
+ 4 * ((wIndex
& 0xff) - 1));
686 spin_lock_irqsave (&ehci
->lock
, flags
);
688 case ClearHubFeature
:
690 case C_HUB_LOCAL_POWER
:
691 case C_HUB_OVER_CURRENT
:
692 /* no hub-wide feature/status flags */
698 case ClearPortFeature
:
699 if (!wIndex
|| wIndex
> ports
)
702 temp
= ehci_readl(ehci
, status_reg
);
703 temp
&= ~PORT_RWC_BITS
;
706 * Even if OWNER is set, so the port is owned by the
707 * companion controller, khubd needs to be able to clear
708 * the port-change status bits (especially
709 * USB_PORT_STAT_C_CONNECTION).
713 case USB_PORT_FEAT_ENABLE
:
714 ehci_writel(ehci
, temp
& ~PORT_PE
, status_reg
);
716 case USB_PORT_FEAT_C_ENABLE
:
717 ehci_writel(ehci
, temp
| PORT_PEC
, status_reg
);
719 case USB_PORT_FEAT_SUSPEND
:
720 if (temp
& PORT_RESET
)
722 if (ehci
->no_selective_suspend
)
724 #ifdef CONFIG_USB_OTG
725 if ((hcd
->self
.otg_port
== (wIndex
+ 1))
726 && hcd
->self
.b_hnp_enable
) {
727 otg_start_hnp(ehci
->transceiver
->otg
);
731 if (!(temp
& PORT_SUSPEND
))
733 if ((temp
& PORT_PE
) == 0)
736 /* clear phy low-power mode before resume */
738 temp1
= ehci_readl(ehci
, hostpc_reg
);
739 ehci_writel(ehci
, temp1
& ~HOSTPC_PHCD
,
741 spin_unlock_irqrestore(&ehci
->lock
, flags
);
742 msleep(5);/* wait to leave low-power mode */
743 spin_lock_irqsave(&ehci
->lock
, flags
);
745 /* resume signaling for 20 msec */
746 temp
&= ~PORT_WAKE_BITS
;
747 ehci_writel(ehci
, temp
| PORT_RESUME
, status_reg
);
748 ehci
->reset_done
[wIndex
] = jiffies
749 + msecs_to_jiffies(20);
751 case USB_PORT_FEAT_C_SUSPEND
:
752 clear_bit(wIndex
, &ehci
->port_c_suspend
);
754 case USB_PORT_FEAT_POWER
:
755 if (HCS_PPC (ehci
->hcs_params
))
756 ehci_writel(ehci
, temp
& ~PORT_POWER
,
759 case USB_PORT_FEAT_C_CONNECTION
:
761 /* clear PORTSC bits on disconnect */
763 temp
&= ~PORT_DEV_ADDR
;
765 ehci_writel(ehci
, temp
| PORT_CSC
, status_reg
);
767 case USB_PORT_FEAT_C_OVER_CURRENT
:
768 ehci_writel(ehci
, temp
| PORT_OCC
, status_reg
);
770 case USB_PORT_FEAT_C_RESET
:
771 /* GetPortStatus clears reset */
776 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted write */
778 case GetHubDescriptor
:
779 ehci_hub_descriptor (ehci
, (struct usb_hub_descriptor
*)
783 /* no hub-wide feature/status flags */
785 //cpu_to_le32s ((u32 *) buf);
788 if (!wIndex
|| wIndex
> ports
)
792 temp
= ehci_readl(ehci
, status_reg
);
796 status
|= USB_PORT_STAT_C_CONNECTION
<< 16;
798 status
|= USB_PORT_STAT_C_ENABLE
<< 16;
800 if ((temp
& PORT_OCC
) && !ignore_oc
){
801 status
|= USB_PORT_STAT_C_OVERCURRENT
<< 16;
804 * Hubs should disable port power on over-current.
805 * However, not all EHCI implementations do this
806 * automatically, even if they _do_ support per-port
807 * power switching; they're allowed to just limit the
808 * current. khubd will turn the power back on.
810 if ((temp
& PORT_OC
) && HCS_PPC(ehci
->hcs_params
)) {
812 temp
& ~(PORT_RWC_BITS
| PORT_POWER
),
814 temp
= ehci_readl(ehci
, status_reg
);
818 /* whoever resumes must GetPortStatus to complete it!! */
819 if (temp
& PORT_RESUME
) {
821 /* Remote Wakeup received? */
822 if (!ehci
->reset_done
[wIndex
]) {
823 /* resume signaling for 20 msec */
824 ehci
->reset_done
[wIndex
] = jiffies
825 + msecs_to_jiffies(20);
826 /* check the port again */
827 mod_timer(&ehci_to_hcd(ehci
)->rh_timer
,
828 ehci
->reset_done
[wIndex
]);
831 /* resume completed? */
832 else if (time_after_eq(jiffies
,
833 ehci
->reset_done
[wIndex
])) {
834 clear_bit(wIndex
, &ehci
->suspended_ports
);
835 set_bit(wIndex
, &ehci
->port_c_suspend
);
836 ehci
->reset_done
[wIndex
] = 0;
838 /* stop resume signaling */
839 temp
= ehci_readl(ehci
, status_reg
);
841 temp
& ~(PORT_RWC_BITS
| PORT_RESUME
),
843 clear_bit(wIndex
, &ehci
->resuming_ports
);
844 retval
= handshake(ehci
, status_reg
,
845 PORT_RESUME
, 0, 2000 /* 2msec */);
848 "port %d resume error %d\n",
852 temp
&= ~(PORT_SUSPEND
|PORT_RESUME
|(3<<10));
856 /* whoever resets must GetPortStatus to complete it!! */
857 if ((temp
& PORT_RESET
)
858 && time_after_eq(jiffies
,
859 ehci
->reset_done
[wIndex
])) {
860 status
|= USB_PORT_STAT_C_RESET
<< 16;
861 ehci
->reset_done
[wIndex
] = 0;
862 clear_bit(wIndex
, &ehci
->resuming_ports
);
864 /* force reset to complete */
865 ehci_writel(ehci
, temp
& ~(PORT_RWC_BITS
| PORT_RESET
),
867 /* REVISIT: some hardware needs 550+ usec to clear
868 * this bit; seems too long to spin routinely...
870 retval
= handshake(ehci
, status_reg
,
871 PORT_RESET
, 0, 1000);
873 ehci_err (ehci
, "port %d reset error %d\n",
878 /* see what we found out */
879 temp
= check_reset_complete (ehci
, wIndex
, status_reg
,
880 ehci_readl(ehci
, status_reg
));
883 if (!(temp
& (PORT_RESUME
|PORT_RESET
))) {
884 ehci
->reset_done
[wIndex
] = 0;
885 clear_bit(wIndex
, &ehci
->resuming_ports
);
888 /* transfer dedicated ports to the companion hc */
889 if ((temp
& PORT_CONNECT
) &&
890 test_bit(wIndex
, &ehci
->companion_ports
)) {
891 temp
&= ~PORT_RWC_BITS
;
893 ehci_writel(ehci
, temp
, status_reg
);
894 ehci_dbg(ehci
, "port %d --> companion\n", wIndex
+ 1);
895 temp
= ehci_readl(ehci
, status_reg
);
899 * Even if OWNER is set, there's no harm letting khubd
900 * see the wPortStatus values (they should all be 0 except
901 * for PORT_POWER anyway).
904 if (temp
& PORT_CONNECT
) {
905 status
|= USB_PORT_STAT_CONNECTION
;
906 // status may be from integrated TT
907 if (ehci
->has_hostpc
) {
908 temp1
= ehci_readl(ehci
, hostpc_reg
);
909 status
|= ehci_port_speed(ehci
, temp1
);
911 status
|= ehci_port_speed(ehci
, temp
);
914 status
|= USB_PORT_STAT_ENABLE
;
916 /* maybe the port was unsuspended without our knowledge */
917 if (temp
& (PORT_SUSPEND
|PORT_RESUME
)) {
918 status
|= USB_PORT_STAT_SUSPEND
;
919 } else if (test_bit(wIndex
, &ehci
->suspended_ports
)) {
920 clear_bit(wIndex
, &ehci
->suspended_ports
);
921 clear_bit(wIndex
, &ehci
->resuming_ports
);
922 ehci
->reset_done
[wIndex
] = 0;
924 set_bit(wIndex
, &ehci
->port_c_suspend
);
928 status
|= USB_PORT_STAT_OVERCURRENT
;
929 if (temp
& PORT_RESET
)
930 status
|= USB_PORT_STAT_RESET
;
931 if (temp
& PORT_POWER
)
932 status
|= USB_PORT_STAT_POWER
;
933 if (test_bit(wIndex
, &ehci
->port_c_suspend
))
934 status
|= USB_PORT_STAT_C_SUSPEND
<< 16;
936 #ifndef VERBOSE_DEBUG
937 if (status
& ~0xffff) /* only if wPortChange is interesting */
939 dbg_port (ehci
, "GetStatus", wIndex
+ 1, temp
);
940 put_unaligned_le32(status
, buf
);
944 case C_HUB_LOCAL_POWER
:
945 case C_HUB_OVER_CURRENT
:
946 /* no hub-wide feature/status flags */
953 selector
= wIndex
>> 8;
955 if (unlikely(ehci
->debug
)) {
956 /* If the debug port is active any port
957 * feature requests should get denied */
958 if (wIndex
== HCS_DEBUG_PORT(ehci
->hcs_params
) &&
959 (readl(&ehci
->debug
->control
) & DBGP_ENABLED
)) {
964 if (!wIndex
|| wIndex
> ports
)
967 temp
= ehci_readl(ehci
, status_reg
);
968 if (temp
& PORT_OWNER
)
971 temp
&= ~PORT_RWC_BITS
;
973 case USB_PORT_FEAT_SUSPEND
:
974 if (ehci
->no_selective_suspend
)
976 if ((temp
& PORT_PE
) == 0
977 || (temp
& PORT_RESET
) != 0)
980 /* After above check the port must be connected.
981 * Set appropriate bit thus could put phy into low power
982 * mode if we have hostpc feature
984 temp
&= ~PORT_WKCONN_E
;
985 temp
|= PORT_WKDISC_E
| PORT_WKOC_E
;
986 ehci_writel(ehci
, temp
| PORT_SUSPEND
, status_reg
);
988 spin_unlock_irqrestore(&ehci
->lock
, flags
);
989 msleep(5);/* 5ms for HCD enter low pwr mode */
990 spin_lock_irqsave(&ehci
->lock
, flags
);
991 temp1
= ehci_readl(ehci
, hostpc_reg
);
992 ehci_writel(ehci
, temp1
| HOSTPC_PHCD
,
994 temp1
= ehci_readl(ehci
, hostpc_reg
);
995 ehci_dbg(ehci
, "Port%d phy low pwr mode %s\n",
996 wIndex
, (temp1
& HOSTPC_PHCD
) ?
997 "succeeded" : "failed");
999 set_bit(wIndex
, &ehci
->suspended_ports
);
1001 case USB_PORT_FEAT_POWER
:
1002 if (HCS_PPC (ehci
->hcs_params
))
1003 ehci_writel(ehci
, temp
| PORT_POWER
,
1006 case USB_PORT_FEAT_RESET
:
1007 if (temp
& PORT_RESUME
)
1009 /* line status bits may report this as low speed,
1010 * which can be fine if this root hub has a
1011 * transaction translator built in.
1013 if ((temp
& (PORT_PE
|PORT_CONNECT
)) == PORT_CONNECT
1014 && !ehci_is_TDI(ehci
)
1015 && PORT_USB11 (temp
)) {
1017 "port %d low speed --> companion\n",
1021 ehci_vdbg (ehci
, "port %d reset\n", wIndex
+ 1);
1026 * caller must wait, then call GetPortStatus
1027 * usb 2.0 spec says 50 ms resets on root
1029 ehci
->reset_done
[wIndex
] = jiffies
1030 + msecs_to_jiffies (50);
1032 ehci_writel(ehci
, temp
, status_reg
);
1035 /* For downstream facing ports (these): one hub port is put
1036 * into test mode according to USB2 11.24.2.13, then the hub
1037 * must be reset (which for root hub now means rmmod+modprobe,
1038 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1039 * about the EHCI-specific stuff.
1041 case USB_PORT_FEAT_TEST
:
1042 if (!selector
|| selector
> 5)
1046 /* Put all enabled ports into suspend */
1049 &ehci
->regs
->port_status
[ports
];
1051 temp
= ehci_readl(ehci
, sreg
) & ~PORT_RWC_BITS
;
1053 ehci_writel(ehci
, temp
| PORT_SUSPEND
,
1057 temp
= ehci_readl(ehci
, status_reg
);
1058 temp
|= selector
<< 16;
1059 ehci_writel(ehci
, temp
, status_reg
);
1065 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted writes */
1070 /* "stall" on error */
1074 spin_unlock_irqrestore (&ehci
->lock
, flags
);
1078 static void __maybe_unused
ehci_relinquish_port(struct usb_hcd
*hcd
,
1081 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
1083 if (ehci_is_TDI(ehci
))
1085 set_owner(ehci
, --portnum
, PORT_OWNER
);
1088 static int __maybe_unused
ehci_port_handed_over(struct usb_hcd
*hcd
,
1091 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
1094 if (ehci_is_TDI(ehci
))
1096 reg
= &ehci
->regs
->port_status
[portnum
- 1];
1097 return ehci_readl(ehci
, reg
) & PORT_OWNER
;