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 /* Make sure the ports are powered */
60 port
= HCS_N_PORTS(ehci
->hcs_params
);
62 if (test_bit(port
, &ehci
->owned_ports
)) {
63 reg
= &ehci
->regs
->port_status
[port
];
64 status
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
65 if (!(status
& PORT_POWER
)) {
67 ehci_writel(ehci
, status
, reg
);
72 /* Give the connections some time to appear */
75 spin_lock_irq(&ehci
->lock
);
76 port
= HCS_N_PORTS(ehci
->hcs_params
);
78 if (test_bit(port
, &ehci
->owned_ports
)) {
79 reg
= &ehci
->regs
->port_status
[port
];
80 status
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
82 /* Port already owned by companion? */
83 if (status
& PORT_OWNER
)
84 clear_bit(port
, &ehci
->owned_ports
);
85 else if (test_bit(port
, &ehci
->companion_ports
))
86 ehci_writel(ehci
, status
& ~PORT_PE
, reg
);
88 spin_unlock_irq(&ehci
->lock
);
89 ehci_hub_control(hcd
, SetPortFeature
,
90 USB_PORT_FEAT_RESET
, port
+ 1,
92 spin_lock_irq(&ehci
->lock
);
96 spin_unlock_irq(&ehci
->lock
);
98 if (!ehci
->owned_ports
)
100 msleep(90); /* Wait for resets to complete */
102 spin_lock_irq(&ehci
->lock
);
103 port
= HCS_N_PORTS(ehci
->hcs_params
);
105 if (test_bit(port
, &ehci
->owned_ports
)) {
106 spin_unlock_irq(&ehci
->lock
);
107 ehci_hub_control(hcd
, GetPortStatus
,
109 (char *) &buf
, sizeof(buf
));
110 spin_lock_irq(&ehci
->lock
);
112 /* The companion should now own the port,
113 * but if something went wrong the port must not
116 reg
= &ehci
->regs
->port_status
[port
];
117 status
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
118 if (status
& PORT_OWNER
)
119 ehci_writel(ehci
, status
| PORT_CSC
, reg
);
121 ehci_dbg(ehci
, "failed handover port %d: %x\n",
123 ehci_writel(ehci
, status
& ~PORT_PE
, reg
);
128 ehci
->owned_ports
= 0;
129 spin_unlock_irq(&ehci
->lock
);
132 static int ehci_port_change(struct ehci_hcd
*ehci
)
134 int i
= HCS_N_PORTS(ehci
->hcs_params
);
136 /* First check if the controller indicates a change event */
138 if (ehci_readl(ehci
, &ehci
->regs
->status
) & STS_PCD
)
142 * Not all controllers appear to update this while going from D3 to D0,
143 * so check the individual port status registers as well
147 if (ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]) & PORT_CSC
)
153 static void ehci_adjust_port_wakeup_flags(struct ehci_hcd
*ehci
,
154 bool suspending
, bool do_wakeup
)
159 /* If remote wakeup is enabled for the root hub but disabled
160 * for the controller, we must adjust all the port wakeup flags
161 * when the controller is suspended or resumed. In all other
162 * cases they don't need to be changed.
164 if (!ehci_to_hcd(ehci
)->self
.root_hub
->do_remote_wakeup
|| do_wakeup
)
167 spin_lock_irq(&ehci
->lock
);
169 /* clear phy low-power mode before changing wakeup flags */
170 if (ehci
->has_hostpc
) {
171 port
= HCS_N_PORTS(ehci
->hcs_params
);
173 u32 __iomem
*hostpc_reg
= &ehci
->regs
->hostpc
[port
];
175 temp
= ehci_readl(ehci
, hostpc_reg
);
176 ehci_writel(ehci
, temp
& ~HOSTPC_PHCD
, hostpc_reg
);
178 spin_unlock_irq(&ehci
->lock
);
180 spin_lock_irq(&ehci
->lock
);
183 port
= HCS_N_PORTS(ehci
->hcs_params
);
185 u32 __iomem
*reg
= &ehci
->regs
->port_status
[port
];
186 u32 t1
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
187 u32 t2
= t1
& ~PORT_WAKE_BITS
;
189 /* If we are suspending the controller, clear the flags.
190 * If we are resuming the controller, set the wakeup flags.
193 if (t1
& PORT_CONNECT
)
194 t2
|= PORT_WKOC_E
| PORT_WKDISC_E
;
196 t2
|= PORT_WKOC_E
| PORT_WKCONN_E
;
198 ehci_vdbg(ehci
, "port %d, %08x -> %08x\n",
200 ehci_writel(ehci
, t2
, reg
);
203 /* enter phy low-power mode again */
204 if (ehci
->has_hostpc
) {
205 port
= HCS_N_PORTS(ehci
->hcs_params
);
207 u32 __iomem
*hostpc_reg
= &ehci
->regs
->hostpc
[port
];
209 temp
= ehci_readl(ehci
, hostpc_reg
);
210 ehci_writel(ehci
, temp
| HOSTPC_PHCD
, hostpc_reg
);
214 /* Does the root hub have a port wakeup pending? */
215 if (!suspending
&& ehci_port_change(ehci
))
216 usb_hcd_resume_root_hub(ehci_to_hcd(ehci
));
218 spin_unlock_irq(&ehci
->lock
);
221 static int ehci_bus_suspend (struct usb_hcd
*hcd
)
223 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
228 ehci_dbg(ehci
, "suspend root hub\n");
230 if (time_before (jiffies
, ehci
->next_statechange
))
233 /* stop the schedules */
236 spin_lock_irq (&ehci
->lock
);
237 if (ehci
->rh_state
< EHCI_RH_RUNNING
)
240 /* Once the controller is stopped, port resumes that are already
241 * in progress won't complete. Hence if remote wakeup is enabled
242 * for the root hub and any ports are in the middle of a resume or
243 * remote wakeup, we must fail the suspend.
245 if (hcd
->self
.root_hub
->do_remote_wakeup
) {
246 if (ehci
->resuming_ports
) {
247 spin_unlock_irq(&ehci
->lock
);
248 ehci_dbg(ehci
, "suspend failed because a port is resuming\n");
253 /* Unlike other USB host controller types, EHCI doesn't have
254 * any notion of "global" or bus-wide suspend. The driver has
255 * to manually suspend all the active unsuspended ports, and
256 * then manually resume them in the bus_resume() routine.
258 ehci
->bus_suspended
= 0;
259 ehci
->owned_ports
= 0;
261 port
= HCS_N_PORTS(ehci
->hcs_params
);
263 u32 __iomem
*reg
= &ehci
->regs
->port_status
[port
];
264 u32 t1
= ehci_readl(ehci
, reg
) & ~PORT_RWC_BITS
;
265 u32 t2
= t1
& ~PORT_WAKE_BITS
;
267 /* keep track of which ports we suspend */
269 set_bit(port
, &ehci
->owned_ports
);
270 else if ((t1
& PORT_PE
) && !(t1
& PORT_SUSPEND
)) {
272 set_bit(port
, &ehci
->bus_suspended
);
275 /* enable remote wakeup on all ports, if told to do so */
276 if (hcd
->self
.root_hub
->do_remote_wakeup
) {
277 /* only enable appropriate wake bits, otherwise the
278 * hardware can not go phy low power mode. If a race
279 * condition happens here(connection change during bits
280 * set), the port change detection will finally fix it.
282 if (t1
& PORT_CONNECT
)
283 t2
|= PORT_WKOC_E
| PORT_WKDISC_E
;
285 t2
|= PORT_WKOC_E
| PORT_WKCONN_E
;
289 ehci_vdbg (ehci
, "port %d, %08x -> %08x\n",
291 ehci_writel(ehci
, t2
, reg
);
296 if (changed
&& ehci
->has_hostpc
) {
297 spin_unlock_irq(&ehci
->lock
);
298 msleep(5); /* 5 ms for HCD to enter low-power mode */
299 spin_lock_irq(&ehci
->lock
);
301 port
= HCS_N_PORTS(ehci
->hcs_params
);
303 u32 __iomem
*hostpc_reg
= &ehci
->regs
->hostpc
[port
];
306 t3
= ehci_readl(ehci
, hostpc_reg
);
307 ehci_writel(ehci
, t3
| HOSTPC_PHCD
, hostpc_reg
);
308 t3
= ehci_readl(ehci
, hostpc_reg
);
309 ehci_dbg(ehci
, "Port %d phy low-power mode %s\n",
310 port
, (t3
& HOSTPC_PHCD
) ?
311 "succeeded" : "failed");
314 spin_unlock_irq(&ehci
->lock
);
316 /* Apparently some devices need a >= 1-uframe delay here */
317 if (ehci
->bus_suspended
)
320 /* turn off now-idle HC */
323 spin_lock_irq(&ehci
->lock
);
324 if (ehci
->enabled_hrtimer_events
& BIT(EHCI_HRTIMER_POLL_DEAD
))
325 ehci_handle_controller_death(ehci
);
326 if (ehci
->rh_state
!= EHCI_RH_RUNNING
)
328 ehci
->rh_state
= EHCI_RH_SUSPENDED
;
330 end_unlink_async(ehci
);
331 unlink_empty_async_suspended(ehci
);
332 ehci_handle_intr_unlinks(ehci
);
335 /* allow remote wakeup */
337 if (!hcd
->self
.root_hub
->do_remote_wakeup
)
339 ehci_writel(ehci
, mask
, &ehci
->regs
->intr_enable
);
340 ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
343 ehci
->next_statechange
= jiffies
+ msecs_to_jiffies(10);
344 ehci
->enabled_hrtimer_events
= 0;
345 ehci
->next_hrtimer_event
= EHCI_HRTIMER_NO_EVENT
;
346 spin_unlock_irq (&ehci
->lock
);
348 hrtimer_cancel(&ehci
->hrtimer
);
353 /* caller has locked the root hub, and should reset/reinit on error */
354 static int ehci_bus_resume (struct usb_hcd
*hcd
)
356 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
360 unsigned long resume_needed
= 0;
362 if (time_before (jiffies
, ehci
->next_statechange
))
364 spin_lock_irq (&ehci
->lock
);
365 if (!HCD_HW_ACCESSIBLE(hcd
) || ehci
->shutdown
)
368 if (unlikely(ehci
->debug
)) {
369 if (!dbgp_reset_prep(hcd
))
372 dbgp_external_startup(hcd
);
375 /* Ideally and we've got a real resume here, and no port's power
376 * was lost. (For PCI, that means Vaux was maintained.) But we
377 * could instead be restoring a swsusp snapshot -- so that BIOS was
378 * the last user of the controller, not reset/pm hardware keeping
379 * state we gave to it.
381 power_okay
= ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
382 ehci_dbg(ehci
, "resume root hub%s\n",
383 power_okay
? "" : " after power loss");
385 /* at least some APM implementations will try to deliver
386 * IRQs right away, so delay them until we're ready.
388 ehci_writel(ehci
, 0, &ehci
->regs
->intr_enable
);
390 /* re-init operational registers */
391 ehci_writel(ehci
, 0, &ehci
->regs
->segment
);
392 ehci_writel(ehci
, ehci
->periodic_dma
, &ehci
->regs
->frame_list
);
393 ehci_writel(ehci
, (u32
) ehci
->async
->qh_dma
, &ehci
->regs
->async_next
);
395 /* restore CMD_RUN, framelist size, and irq threshold */
396 ehci
->command
|= CMD_RUN
;
397 ehci_writel(ehci
, ehci
->command
, &ehci
->regs
->command
);
398 ehci
->rh_state
= EHCI_RH_RUNNING
;
401 * According to Bugzilla #8190, the port status for some controllers
402 * will be wrong without a delay. At their wrong status, the port
403 * is enabled, but not suspended neither resumed.
405 i
= HCS_N_PORTS(ehci
->hcs_params
);
407 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
408 if ((temp
& PORT_PE
) &&
409 !(temp
& (PORT_SUSPEND
| PORT_RESUME
))) {
410 ehci_dbg(ehci
, "Port status(0x%x) is wrong\n", temp
);
411 spin_unlock_irq(&ehci
->lock
);
413 spin_lock_irq(&ehci
->lock
);
421 /* clear phy low-power mode before resume */
422 if (ehci
->bus_suspended
&& ehci
->has_hostpc
) {
423 i
= HCS_N_PORTS(ehci
->hcs_params
);
425 if (test_bit(i
, &ehci
->bus_suspended
)) {
426 u32 __iomem
*hostpc_reg
=
427 &ehci
->regs
->hostpc
[i
];
429 temp
= ehci_readl(ehci
, hostpc_reg
);
430 ehci_writel(ehci
, temp
& ~HOSTPC_PHCD
,
434 spin_unlock_irq(&ehci
->lock
);
436 spin_lock_irq(&ehci
->lock
);
441 /* manually resume the ports we suspended during bus_suspend() */
442 i
= HCS_N_PORTS (ehci
->hcs_params
);
444 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
445 temp
&= ~(PORT_RWC_BITS
| PORT_WAKE_BITS
);
446 if (test_bit(i
, &ehci
->bus_suspended
) &&
447 (temp
& PORT_SUSPEND
)) {
449 set_bit(i
, &resume_needed
);
451 ehci_writel(ehci
, temp
, &ehci
->regs
->port_status
[i
]);
454 /* msleep for 20ms only if code is trying to resume port */
456 spin_unlock_irq(&ehci
->lock
);
458 spin_lock_irq(&ehci
->lock
);
463 i
= HCS_N_PORTS (ehci
->hcs_params
);
465 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
466 if (test_bit(i
, &resume_needed
)) {
467 temp
&= ~(PORT_RWC_BITS
| PORT_RESUME
);
468 ehci_writel(ehci
, temp
, &ehci
->regs
->port_status
[i
]);
469 ehci_vdbg (ehci
, "resumed port %d\n", i
+ 1);
473 ehci
->next_statechange
= jiffies
+ msecs_to_jiffies(5);
474 spin_unlock_irq(&ehci
->lock
);
476 ehci_handover_companion_ports(ehci
);
478 /* Now we can safely re-enable irqs */
479 spin_lock_irq(&ehci
->lock
);
482 ehci_writel(ehci
, INTR_MASK
, &ehci
->regs
->intr_enable
);
483 (void) ehci_readl(ehci
, &ehci
->regs
->intr_enable
);
484 spin_unlock_irq(&ehci
->lock
);
489 spin_unlock_irq(&ehci
->lock
);
495 #define ehci_bus_suspend NULL
496 #define ehci_bus_resume NULL
498 #endif /* CONFIG_PM */
500 /*-------------------------------------------------------------------------*/
503 * Sets the owner of a port
505 static void set_owner(struct ehci_hcd
*ehci
, int portnum
, int new_owner
)
507 u32 __iomem
*status_reg
;
511 status_reg
= &ehci
->regs
->port_status
[portnum
];
514 * The controller won't set the OWNER bit if the port is
515 * enabled, so this loop will sometimes require at least two
516 * iterations: one to disable the port and one to set OWNER.
518 for (try = 4; try > 0; --try) {
519 spin_lock_irq(&ehci
->lock
);
520 port_status
= ehci_readl(ehci
, status_reg
);
521 if ((port_status
& PORT_OWNER
) == new_owner
522 || (port_status
& (PORT_OWNER
| PORT_CONNECT
))
526 port_status
^= PORT_OWNER
;
527 port_status
&= ~(PORT_PE
| PORT_RWC_BITS
);
528 ehci_writel(ehci
, port_status
, status_reg
);
530 spin_unlock_irq(&ehci
->lock
);
536 /*-------------------------------------------------------------------------*/
538 static int check_reset_complete (
539 struct ehci_hcd
*ehci
,
541 u32 __iomem
*status_reg
,
544 if (!(port_status
& PORT_CONNECT
))
547 /* if reset finished and it's still not enabled -- handoff */
548 if (!(port_status
& PORT_PE
)) {
550 /* with integrated TT, there's nobody to hand it to! */
551 if (ehci_is_TDI(ehci
)) {
553 "Failed to enable port %d on root hub TT\n",
558 ehci_dbg (ehci
, "port %d full speed --> companion\n",
561 // what happens if HCS_N_CC(params) == 0 ?
562 port_status
|= PORT_OWNER
;
563 port_status
&= ~PORT_RWC_BITS
;
564 ehci_writel(ehci
, port_status
, status_reg
);
566 /* ensure 440EPX ohci controller state is operational */
567 if (ehci
->has_amcc_usb23
)
568 set_ohci_hcfs(ehci
, 1);
570 ehci_dbg(ehci
, "port %d reset complete, port enabled\n",
572 /* ensure 440EPx ohci controller state is suspended */
573 if (ehci
->has_amcc_usb23
)
574 set_ohci_hcfs(ehci
, 0);
580 /*-------------------------------------------------------------------------*/
583 /* build "status change" packet (one or two bytes) from HC registers */
586 ehci_hub_status_data (struct usb_hcd
*hcd
, char *buf
)
588 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
591 int ports
, i
, retval
= 1;
595 /* init status to no-changes */
597 ports
= HCS_N_PORTS (ehci
->hcs_params
);
603 /* Inform the core about resumes-in-progress by returning
604 * a non-zero value even if there are no status changes.
606 status
= ehci
->resuming_ports
;
608 /* Some boards (mostly VIA?) report bogus overcurrent indications,
609 * causing massive log spam unless we completely ignore them. It
610 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
611 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
612 * PORT_POWER; that's surprising, but maybe within-spec.
615 mask
= PORT_CSC
| PORT_PEC
| PORT_OCC
;
617 mask
= PORT_CSC
| PORT_PEC
;
618 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
620 /* no hub change reports (bit 0) for now (power, ...) */
622 /* port N changes (bit N)? */
623 spin_lock_irqsave (&ehci
->lock
, flags
);
625 /* get per-port change detect bits */
627 ppcd
= ehci_readl(ehci
, &ehci
->regs
->status
) >> 16;
629 for (i
= 0; i
< ports
; i
++) {
630 /* leverage per-port change bits feature */
631 if (ehci
->has_ppcd
&& !(ppcd
& (1 << i
)))
633 temp
= ehci_readl(ehci
, &ehci
->regs
->port_status
[i
]);
636 * Return status information even for ports with OWNER set.
637 * Otherwise khubd wouldn't see the disconnect event when a
638 * high-speed device is switched over to the companion
639 * controller by the user.
642 if ((temp
& mask
) != 0 || test_bit(i
, &ehci
->port_c_suspend
)
643 || (ehci
->reset_done
[i
] && time_after_eq(
644 jiffies
, ehci
->reset_done
[i
]))) {
646 buf
[0] |= 1 << (i
+ 1);
648 buf
[1] |= 1 << (i
- 7);
653 /* If a resume is in progress, make sure it can finish */
654 if (ehci
->resuming_ports
)
655 mod_timer(&hcd
->rh_timer
, jiffies
+ msecs_to_jiffies(25));
657 spin_unlock_irqrestore (&ehci
->lock
, flags
);
658 return status
? retval
: 0;
661 /*-------------------------------------------------------------------------*/
664 ehci_hub_descriptor (
665 struct ehci_hcd
*ehci
,
666 struct usb_hub_descriptor
*desc
668 int ports
= HCS_N_PORTS (ehci
->hcs_params
);
671 desc
->bDescriptorType
= 0x29;
672 desc
->bPwrOn2PwrGood
= 10; /* ehci 1.0, 2.3.9 says 20ms max */
673 desc
->bHubContrCurrent
= 0;
675 desc
->bNbrPorts
= ports
;
676 temp
= 1 + (ports
/ 8);
677 desc
->bDescLength
= 7 + 2 * temp
;
679 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
680 memset(&desc
->u
.hs
.DeviceRemovable
[0], 0, temp
);
681 memset(&desc
->u
.hs
.DeviceRemovable
[temp
], 0xff, temp
);
683 temp
= 0x0008; /* per-port overcurrent reporting */
684 if (HCS_PPC (ehci
->hcs_params
))
685 temp
|= 0x0001; /* per-port power control */
687 temp
|= 0x0002; /* no power switching */
689 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
690 if (HCS_INDICATOR (ehci
->hcs_params
))
691 temp
|= 0x0080; /* per-port indicators (LEDs) */
693 desc
->wHubCharacteristics
= cpu_to_le16(temp
);
696 /*-------------------------------------------------------------------------*/
698 static int ehci_hub_control (
706 struct ehci_hcd
*ehci
= hcd_to_ehci (hcd
);
707 int ports
= HCS_N_PORTS (ehci
->hcs_params
);
708 u32 __iomem
*status_reg
= &ehci
->regs
->port_status
[
709 (wIndex
& 0xff) - 1];
710 u32 __iomem
*hostpc_reg
= &ehci
->regs
->hostpc
[(wIndex
& 0xff) - 1];
711 u32 temp
, temp1
, status
;
717 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
718 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
719 * (track current state ourselves) ... blink for diagnostics,
720 * power, "this is the one", etc. EHCI spec supports this.
723 spin_lock_irqsave (&ehci
->lock
, flags
);
725 case ClearHubFeature
:
727 case C_HUB_LOCAL_POWER
:
728 case C_HUB_OVER_CURRENT
:
729 /* no hub-wide feature/status flags */
735 case ClearPortFeature
:
736 if (!wIndex
|| wIndex
> ports
)
739 temp
= ehci_readl(ehci
, status_reg
);
740 temp
&= ~PORT_RWC_BITS
;
743 * Even if OWNER is set, so the port is owned by the
744 * companion controller, khubd needs to be able to clear
745 * the port-change status bits (especially
746 * USB_PORT_STAT_C_CONNECTION).
750 case USB_PORT_FEAT_ENABLE
:
751 ehci_writel(ehci
, temp
& ~PORT_PE
, status_reg
);
753 case USB_PORT_FEAT_C_ENABLE
:
754 ehci_writel(ehci
, temp
| PORT_PEC
, status_reg
);
756 case USB_PORT_FEAT_SUSPEND
:
757 if (temp
& PORT_RESET
)
759 if (ehci
->no_selective_suspend
)
761 #ifdef CONFIG_USB_OTG
762 if ((hcd
->self
.otg_port
== (wIndex
+ 1))
763 && hcd
->self
.b_hnp_enable
) {
764 otg_start_hnp(hcd
->phy
->otg
);
768 if (!(temp
& PORT_SUSPEND
))
770 if ((temp
& PORT_PE
) == 0)
773 /* clear phy low-power mode before resume */
774 if (ehci
->has_hostpc
) {
775 temp1
= ehci_readl(ehci
, hostpc_reg
);
776 ehci_writel(ehci
, temp1
& ~HOSTPC_PHCD
,
778 spin_unlock_irqrestore(&ehci
->lock
, flags
);
779 msleep(5);/* wait to leave low-power mode */
780 spin_lock_irqsave(&ehci
->lock
, flags
);
782 /* resume signaling for 20 msec */
783 temp
&= ~PORT_WAKE_BITS
;
784 ehci_writel(ehci
, temp
| PORT_RESUME
, status_reg
);
785 ehci
->reset_done
[wIndex
] = jiffies
786 + msecs_to_jiffies(20);
788 case USB_PORT_FEAT_C_SUSPEND
:
789 clear_bit(wIndex
, &ehci
->port_c_suspend
);
791 case USB_PORT_FEAT_POWER
:
792 if (HCS_PPC (ehci
->hcs_params
))
793 ehci_writel(ehci
, temp
& ~PORT_POWER
,
796 case USB_PORT_FEAT_C_CONNECTION
:
797 ehci_writel(ehci
, temp
| PORT_CSC
, status_reg
);
799 case USB_PORT_FEAT_C_OVER_CURRENT
:
800 ehci_writel(ehci
, temp
| PORT_OCC
, status_reg
);
802 case USB_PORT_FEAT_C_RESET
:
803 /* GetPortStatus clears reset */
808 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted write */
810 case GetHubDescriptor
:
811 ehci_hub_descriptor (ehci
, (struct usb_hub_descriptor
*)
815 /* no hub-wide feature/status flags */
817 //cpu_to_le32s ((u32 *) buf);
820 if (!wIndex
|| wIndex
> ports
)
824 temp
= ehci_readl(ehci
, status_reg
);
828 status
|= USB_PORT_STAT_C_CONNECTION
<< 16;
830 status
|= USB_PORT_STAT_C_ENABLE
<< 16;
832 if ((temp
& PORT_OCC
) && !ignore_oc
){
833 status
|= USB_PORT_STAT_C_OVERCURRENT
<< 16;
836 * Hubs should disable port power on over-current.
837 * However, not all EHCI implementations do this
838 * automatically, even if they _do_ support per-port
839 * power switching; they're allowed to just limit the
840 * current. khubd will turn the power back on.
842 if ((temp
& PORT_OC
) && HCS_PPC(ehci
->hcs_params
)) {
844 temp
& ~(PORT_RWC_BITS
| PORT_POWER
),
846 temp
= ehci_readl(ehci
, status_reg
);
850 /* whoever resumes must GetPortStatus to complete it!! */
851 if (temp
& PORT_RESUME
) {
853 /* Remote Wakeup received? */
854 if (!ehci
->reset_done
[wIndex
]) {
855 /* resume signaling for 20 msec */
856 ehci
->reset_done
[wIndex
] = jiffies
857 + msecs_to_jiffies(20);
858 usb_hcd_start_port_resume(&hcd
->self
, wIndex
);
859 /* check the port again */
860 mod_timer(&ehci_to_hcd(ehci
)->rh_timer
,
861 ehci
->reset_done
[wIndex
]);
864 /* resume completed? */
865 else if (time_after_eq(jiffies
,
866 ehci
->reset_done
[wIndex
])) {
867 clear_bit(wIndex
, &ehci
->suspended_ports
);
868 set_bit(wIndex
, &ehci
->port_c_suspend
);
869 ehci
->reset_done
[wIndex
] = 0;
870 usb_hcd_end_port_resume(&hcd
->self
, wIndex
);
872 /* stop resume signaling */
873 temp
= ehci_readl(ehci
, status_reg
);
875 temp
& ~(PORT_RWC_BITS
| PORT_RESUME
),
877 clear_bit(wIndex
, &ehci
->resuming_ports
);
878 retval
= handshake(ehci
, status_reg
,
879 PORT_RESUME
, 0, 2000 /* 2msec */);
882 "port %d resume error %d\n",
886 temp
&= ~(PORT_SUSPEND
|PORT_RESUME
|(3<<10));
890 /* whoever resets must GetPortStatus to complete it!! */
891 if ((temp
& PORT_RESET
)
892 && time_after_eq(jiffies
,
893 ehci
->reset_done
[wIndex
])) {
894 status
|= USB_PORT_STAT_C_RESET
<< 16;
895 ehci
->reset_done
[wIndex
] = 0;
896 clear_bit(wIndex
, &ehci
->resuming_ports
);
898 /* force reset to complete */
899 ehci_writel(ehci
, temp
& ~(PORT_RWC_BITS
| PORT_RESET
),
901 /* REVISIT: some hardware needs 550+ usec to clear
902 * this bit; seems too long to spin routinely...
904 retval
= handshake(ehci
, status_reg
,
905 PORT_RESET
, 0, 1000);
907 ehci_err (ehci
, "port %d reset error %d\n",
912 /* see what we found out */
913 temp
= check_reset_complete (ehci
, wIndex
, status_reg
,
914 ehci_readl(ehci
, status_reg
));
917 if (!(temp
& (PORT_RESUME
|PORT_RESET
))) {
918 ehci
->reset_done
[wIndex
] = 0;
919 clear_bit(wIndex
, &ehci
->resuming_ports
);
922 /* transfer dedicated ports to the companion hc */
923 if ((temp
& PORT_CONNECT
) &&
924 test_bit(wIndex
, &ehci
->companion_ports
)) {
925 temp
&= ~PORT_RWC_BITS
;
927 ehci_writel(ehci
, temp
, status_reg
);
928 ehci_dbg(ehci
, "port %d --> companion\n", wIndex
+ 1);
929 temp
= ehci_readl(ehci
, status_reg
);
933 * Even if OWNER is set, there's no harm letting khubd
934 * see the wPortStatus values (they should all be 0 except
935 * for PORT_POWER anyway).
938 if (temp
& PORT_CONNECT
) {
939 status
|= USB_PORT_STAT_CONNECTION
;
940 // status may be from integrated TT
941 if (ehci
->has_hostpc
) {
942 temp1
= ehci_readl(ehci
, hostpc_reg
);
943 status
|= ehci_port_speed(ehci
, temp1
);
945 status
|= ehci_port_speed(ehci
, temp
);
948 status
|= USB_PORT_STAT_ENABLE
;
950 /* maybe the port was unsuspended without our knowledge */
951 if (temp
& (PORT_SUSPEND
|PORT_RESUME
)) {
952 status
|= USB_PORT_STAT_SUSPEND
;
953 } else if (test_bit(wIndex
, &ehci
->suspended_ports
)) {
954 clear_bit(wIndex
, &ehci
->suspended_ports
);
955 clear_bit(wIndex
, &ehci
->resuming_ports
);
956 ehci
->reset_done
[wIndex
] = 0;
958 set_bit(wIndex
, &ehci
->port_c_suspend
);
959 usb_hcd_end_port_resume(&hcd
->self
, wIndex
);
963 status
|= USB_PORT_STAT_OVERCURRENT
;
964 if (temp
& PORT_RESET
)
965 status
|= USB_PORT_STAT_RESET
;
966 if (temp
& PORT_POWER
)
967 status
|= USB_PORT_STAT_POWER
;
968 if (test_bit(wIndex
, &ehci
->port_c_suspend
))
969 status
|= USB_PORT_STAT_C_SUSPEND
<< 16;
971 #ifndef VERBOSE_DEBUG
972 if (status
& ~0xffff) /* only if wPortChange is interesting */
974 dbg_port (ehci
, "GetStatus", wIndex
+ 1, temp
);
975 put_unaligned_le32(status
, buf
);
979 case C_HUB_LOCAL_POWER
:
980 case C_HUB_OVER_CURRENT
:
981 /* no hub-wide feature/status flags */
988 selector
= wIndex
>> 8;
990 if (unlikely(ehci
->debug
)) {
991 /* If the debug port is active any port
992 * feature requests should get denied */
993 if (wIndex
== HCS_DEBUG_PORT(ehci
->hcs_params
) &&
994 (readl(&ehci
->debug
->control
) & DBGP_ENABLED
)) {
999 if (!wIndex
|| wIndex
> ports
)
1002 temp
= ehci_readl(ehci
, status_reg
);
1003 if (temp
& PORT_OWNER
)
1006 temp
&= ~PORT_RWC_BITS
;
1008 case USB_PORT_FEAT_SUSPEND
:
1009 if (ehci
->no_selective_suspend
)
1011 if ((temp
& PORT_PE
) == 0
1012 || (temp
& PORT_RESET
) != 0)
1015 /* After above check the port must be connected.
1016 * Set appropriate bit thus could put phy into low power
1017 * mode if we have hostpc feature
1019 temp
&= ~PORT_WKCONN_E
;
1020 temp
|= PORT_WKDISC_E
| PORT_WKOC_E
;
1021 ehci_writel(ehci
, temp
| PORT_SUSPEND
, status_reg
);
1022 if (ehci
->has_hostpc
) {
1023 spin_unlock_irqrestore(&ehci
->lock
, flags
);
1024 msleep(5);/* 5ms for HCD enter low pwr mode */
1025 spin_lock_irqsave(&ehci
->lock
, flags
);
1026 temp1
= ehci_readl(ehci
, hostpc_reg
);
1027 ehci_writel(ehci
, temp1
| HOSTPC_PHCD
,
1029 temp1
= ehci_readl(ehci
, hostpc_reg
);
1030 ehci_dbg(ehci
, "Port%d phy low pwr mode %s\n",
1031 wIndex
, (temp1
& HOSTPC_PHCD
) ?
1032 "succeeded" : "failed");
1034 set_bit(wIndex
, &ehci
->suspended_ports
);
1036 case USB_PORT_FEAT_POWER
:
1037 if (HCS_PPC (ehci
->hcs_params
))
1038 ehci_writel(ehci
, temp
| PORT_POWER
,
1041 case USB_PORT_FEAT_RESET
:
1042 if (temp
& PORT_RESUME
)
1044 /* line status bits may report this as low speed,
1045 * which can be fine if this root hub has a
1046 * transaction translator built in.
1048 if ((temp
& (PORT_PE
|PORT_CONNECT
)) == PORT_CONNECT
1049 && !ehci_is_TDI(ehci
)
1050 && PORT_USB11 (temp
)) {
1052 "port %d low speed --> companion\n",
1056 ehci_vdbg (ehci
, "port %d reset\n", wIndex
+ 1);
1061 * caller must wait, then call GetPortStatus
1062 * usb 2.0 spec says 50 ms resets on root
1064 ehci
->reset_done
[wIndex
] = jiffies
1065 + msecs_to_jiffies (50);
1067 ehci_writel(ehci
, temp
, status_reg
);
1070 /* For downstream facing ports (these): one hub port is put
1071 * into test mode according to USB2 11.24.2.13, then the hub
1072 * must be reset (which for root hub now means rmmod+modprobe,
1073 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1074 * about the EHCI-specific stuff.
1076 case USB_PORT_FEAT_TEST
:
1077 if (!selector
|| selector
> 5)
1079 spin_unlock_irqrestore(&ehci
->lock
, flags
);
1081 spin_lock_irqsave(&ehci
->lock
, flags
);
1083 /* Put all enabled ports into suspend */
1086 &ehci
->regs
->port_status
[ports
];
1088 temp
= ehci_readl(ehci
, sreg
) & ~PORT_RWC_BITS
;
1090 ehci_writel(ehci
, temp
| PORT_SUSPEND
,
1094 spin_unlock_irqrestore(&ehci
->lock
, flags
);
1096 spin_lock_irqsave(&ehci
->lock
, flags
);
1098 temp
= ehci_readl(ehci
, status_reg
);
1099 temp
|= selector
<< 16;
1100 ehci_writel(ehci
, temp
, status_reg
);
1106 ehci_readl(ehci
, &ehci
->regs
->command
); /* unblock posted writes */
1111 /* "stall" on error */
1115 spin_unlock_irqrestore (&ehci
->lock
, flags
);
1119 static void ehci_relinquish_port(struct usb_hcd
*hcd
, int portnum
)
1121 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
1123 if (ehci_is_TDI(ehci
))
1125 set_owner(ehci
, --portnum
, PORT_OWNER
);
1128 static int ehci_port_handed_over(struct usb_hcd
*hcd
, int portnum
)
1130 struct ehci_hcd
*ehci
= hcd_to_ehci(hcd
);
1133 if (ehci_is_TDI(ehci
))
1135 reg
= &ehci
->regs
->port_status
[portnum
- 1];
1136 return ehci_readl(ehci
, reg
) & PORT_OWNER
;