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UBUNTU: Ubuntu-4.15.0-96.97
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / host / ehci-hub.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2001-2004 by David Brownell
4 */
5
6 /* this file is part of ehci-hcd.c */
7
8 /*-------------------------------------------------------------------------*/
9
10 /*
11 * EHCI Root Hub ... the nonsharable stuff
12 *
13 * Registers don't need cpu_to_le32, that happens transparently
14 */
15
16 /*-------------------------------------------------------------------------*/
17 #include <linux/usb/otg.h>
18
19 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
20
21 #ifdef CONFIG_PM
22
23 static void unlink_empty_async_suspended(struct ehci_hcd *ehci);
24
25 static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
26 {
27 return !udev->maxchild && udev->persist_enabled &&
28 udev->bus->root_hub->speed < USB_SPEED_HIGH;
29 }
30
31 /* After a power loss, ports that were owned by the companion must be
32 * reset so that the companion can still own them.
33 */
34 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
35 {
36 u32 __iomem *reg;
37 u32 status;
38 int port;
39 __le32 buf;
40 struct usb_hcd *hcd = ehci_to_hcd(ehci);
41
42 if (!ehci->owned_ports)
43 return;
44
45 /*
46 * USB 1.1 devices are mostly HIDs, which don't need to persist across
47 * suspends. If we ensure that none of our companion's devices have
48 * persist_enabled (by looking through all USB 1.1 buses in the system),
49 * we can skip this and avoid slowing resume down. Devices without
50 * persist will just get reenumerated shortly after resume anyway.
51 */
52 if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
53 return;
54
55 /* Make sure the ports are powered */
56 port = HCS_N_PORTS(ehci->hcs_params);
57 while (port--) {
58 if (test_bit(port, &ehci->owned_ports)) {
59 reg = &ehci->regs->port_status[port];
60 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
61 if (!(status & PORT_POWER))
62 ehci_port_power(ehci, port, true);
63 }
64 }
65
66 /* Give the connections some time to appear */
67 msleep(20);
68
69 spin_lock_irq(&ehci->lock);
70 port = HCS_N_PORTS(ehci->hcs_params);
71 while (port--) {
72 if (test_bit(port, &ehci->owned_ports)) {
73 reg = &ehci->regs->port_status[port];
74 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
75
76 /* Port already owned by companion? */
77 if (status & PORT_OWNER)
78 clear_bit(port, &ehci->owned_ports);
79 else if (test_bit(port, &ehci->companion_ports))
80 ehci_writel(ehci, status & ~PORT_PE, reg);
81 else {
82 spin_unlock_irq(&ehci->lock);
83 ehci_hub_control(hcd, SetPortFeature,
84 USB_PORT_FEAT_RESET, port + 1,
85 NULL, 0);
86 spin_lock_irq(&ehci->lock);
87 }
88 }
89 }
90 spin_unlock_irq(&ehci->lock);
91
92 if (!ehci->owned_ports)
93 return;
94 msleep(90); /* Wait for resets to complete */
95
96 spin_lock_irq(&ehci->lock);
97 port = HCS_N_PORTS(ehci->hcs_params);
98 while (port--) {
99 if (test_bit(port, &ehci->owned_ports)) {
100 spin_unlock_irq(&ehci->lock);
101 ehci_hub_control(hcd, GetPortStatus,
102 0, port + 1,
103 (char *) &buf, sizeof(buf));
104 spin_lock_irq(&ehci->lock);
105
106 /* The companion should now own the port,
107 * but if something went wrong the port must not
108 * remain enabled.
109 */
110 reg = &ehci->regs->port_status[port];
111 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
112 if (status & PORT_OWNER)
113 ehci_writel(ehci, status | PORT_CSC, reg);
114 else {
115 ehci_dbg(ehci, "failed handover port %d: %x\n",
116 port + 1, status);
117 ehci_writel(ehci, status & ~PORT_PE, reg);
118 }
119 }
120 }
121
122 ehci->owned_ports = 0;
123 spin_unlock_irq(&ehci->lock);
124 }
125
126 static int ehci_port_change(struct ehci_hcd *ehci)
127 {
128 int i = HCS_N_PORTS(ehci->hcs_params);
129
130 /* First check if the controller indicates a change event */
131
132 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
133 return 1;
134
135 /*
136 * Not all controllers appear to update this while going from D3 to D0,
137 * so check the individual port status registers as well
138 */
139
140 while (i--)
141 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
142 return 1;
143
144 return 0;
145 }
146
147 void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
148 bool suspending, bool do_wakeup)
149 {
150 int port;
151 u32 temp;
152
153 /* If remote wakeup is enabled for the root hub but disabled
154 * for the controller, we must adjust all the port wakeup flags
155 * when the controller is suspended or resumed. In all other
156 * cases they don't need to be changed.
157 */
158 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
159 return;
160
161 spin_lock_irq(&ehci->lock);
162
163 /* clear phy low-power mode before changing wakeup flags */
164 if (ehci->has_tdi_phy_lpm) {
165 port = HCS_N_PORTS(ehci->hcs_params);
166 while (port--) {
167 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
168
169 temp = ehci_readl(ehci, hostpc_reg);
170 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
171 }
172 spin_unlock_irq(&ehci->lock);
173 msleep(5);
174 spin_lock_irq(&ehci->lock);
175 }
176
177 port = HCS_N_PORTS(ehci->hcs_params);
178 while (port--) {
179 u32 __iomem *reg = &ehci->regs->port_status[port];
180 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
181 u32 t2 = t1 & ~PORT_WAKE_BITS;
182
183 /* If we are suspending the controller, clear the flags.
184 * If we are resuming the controller, set the wakeup flags.
185 */
186 if (!suspending) {
187 if (t1 & PORT_CONNECT)
188 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
189 else
190 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
191 }
192 ehci_writel(ehci, t2, reg);
193 }
194
195 /* enter phy low-power mode again */
196 if (ehci->has_tdi_phy_lpm) {
197 port = HCS_N_PORTS(ehci->hcs_params);
198 while (port--) {
199 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
200
201 temp = ehci_readl(ehci, hostpc_reg);
202 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
203 }
204 }
205
206 /* Does the root hub have a port wakeup pending? */
207 if (!suspending && ehci_port_change(ehci))
208 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
209
210 spin_unlock_irq(&ehci->lock);
211 }
212 EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags);
213
214 static int ehci_bus_suspend (struct usb_hcd *hcd)
215 {
216 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
217 int port;
218 int mask;
219 int changed;
220 bool fs_idle_delay;
221
222 ehci_dbg(ehci, "suspend root hub\n");
223
224 if (time_before (jiffies, ehci->next_statechange))
225 msleep(5);
226
227 /* stop the schedules */
228 ehci_quiesce(ehci);
229
230 spin_lock_irq (&ehci->lock);
231 if (ehci->rh_state < EHCI_RH_RUNNING)
232 goto done;
233
234 /* Once the controller is stopped, port resumes that are already
235 * in progress won't complete. Hence if remote wakeup is enabled
236 * for the root hub and any ports are in the middle of a resume or
237 * remote wakeup, we must fail the suspend.
238 */
239 if (hcd->self.root_hub->do_remote_wakeup) {
240 if (ehci->resuming_ports) {
241 spin_unlock_irq(&ehci->lock);
242 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
243 return -EBUSY;
244 }
245 }
246
247 /* Unlike other USB host controller types, EHCI doesn't have
248 * any notion of "global" or bus-wide suspend. The driver has
249 * to manually suspend all the active unsuspended ports, and
250 * then manually resume them in the bus_resume() routine.
251 */
252 ehci->bus_suspended = 0;
253 ehci->owned_ports = 0;
254 changed = 0;
255 fs_idle_delay = false;
256 port = HCS_N_PORTS(ehci->hcs_params);
257 while (port--) {
258 u32 __iomem *reg = &ehci->regs->port_status [port];
259 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
260 u32 t2 = t1 & ~PORT_WAKE_BITS;
261
262 /* keep track of which ports we suspend */
263 if (t1 & PORT_OWNER)
264 set_bit(port, &ehci->owned_ports);
265 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
266 t2 |= PORT_SUSPEND;
267 set_bit(port, &ehci->bus_suspended);
268 }
269
270 /* enable remote wakeup on all ports, if told to do so */
271 if (hcd->self.root_hub->do_remote_wakeup) {
272 /* only enable appropriate wake bits, otherwise the
273 * hardware can not go phy low power mode. If a race
274 * condition happens here(connection change during bits
275 * set), the port change detection will finally fix it.
276 */
277 if (t1 & PORT_CONNECT)
278 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
279 else
280 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
281 }
282
283 if (t1 != t2) {
284 /*
285 * On some controllers, Wake-On-Disconnect will
286 * generate false wakeup signals until the bus
287 * switches over to full-speed idle. For their
288 * sake, add a delay if we need one.
289 */
290 if ((t2 & PORT_WKDISC_E) &&
291 ehci_port_speed(ehci, t2) ==
292 USB_PORT_STAT_HIGH_SPEED)
293 fs_idle_delay = true;
294 ehci_writel(ehci, t2, reg);
295 changed = 1;
296 }
297 }
298 spin_unlock_irq(&ehci->lock);
299
300 if (changed && ehci_has_fsl_susp_errata(ehci))
301 /*
302 * Wait for at least 10 millisecondes to ensure the controller
303 * enter the suspend status before initiating a port resume
304 * using the Force Port Resume bit (Not-EHCI compatible).
305 */
306 usleep_range(10000, 20000);
307
308 if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
309 /*
310 * Wait for HCD to enter low-power mode or for the bus
311 * to switch to full-speed idle.
312 */
313 usleep_range(5000, 5500);
314 }
315
316 if (changed && ehci->has_tdi_phy_lpm) {
317 spin_lock_irq(&ehci->lock);
318 port = HCS_N_PORTS(ehci->hcs_params);
319 while (port--) {
320 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
321 u32 t3;
322
323 t3 = ehci_readl(ehci, hostpc_reg);
324 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
325 t3 = ehci_readl(ehci, hostpc_reg);
326 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
327 port, (t3 & HOSTPC_PHCD) ?
328 "succeeded" : "failed");
329 }
330 spin_unlock_irq(&ehci->lock);
331 }
332
333 /* Apparently some devices need a >= 1-uframe delay here */
334 if (ehci->bus_suspended)
335 udelay(150);
336
337 /* turn off now-idle HC */
338 ehci_halt (ehci);
339
340 spin_lock_irq(&ehci->lock);
341 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
342 ehci_handle_controller_death(ehci);
343 if (ehci->rh_state != EHCI_RH_RUNNING)
344 goto done;
345 ehci->rh_state = EHCI_RH_SUSPENDED;
346
347 unlink_empty_async_suspended(ehci);
348
349 /* Any IAA cycle that started before the suspend is now invalid */
350 end_iaa_cycle(ehci);
351 ehci_handle_start_intr_unlinks(ehci);
352 ehci_handle_intr_unlinks(ehci);
353 end_free_itds(ehci);
354
355 /* allow remote wakeup */
356 mask = INTR_MASK;
357 if (!hcd->self.root_hub->do_remote_wakeup)
358 mask &= ~STS_PCD;
359 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
360 ehci_readl(ehci, &ehci->regs->intr_enable);
361
362 done:
363 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
364 ehci->enabled_hrtimer_events = 0;
365 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
366 spin_unlock_irq (&ehci->lock);
367
368 hrtimer_cancel(&ehci->hrtimer);
369 return 0;
370 }
371
372
373 /* caller has locked the root hub, and should reset/reinit on error */
374 static int ehci_bus_resume (struct usb_hcd *hcd)
375 {
376 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
377 u32 temp;
378 u32 power_okay;
379 int i;
380 unsigned long resume_needed = 0;
381
382 if (time_before (jiffies, ehci->next_statechange))
383 msleep(5);
384 spin_lock_irq (&ehci->lock);
385 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
386 goto shutdown;
387
388 if (unlikely(ehci->debug)) {
389 if (!dbgp_reset_prep(hcd))
390 ehci->debug = NULL;
391 else
392 dbgp_external_startup(hcd);
393 }
394
395 /* Ideally and we've got a real resume here, and no port's power
396 * was lost. (For PCI, that means Vaux was maintained.) But we
397 * could instead be restoring a swsusp snapshot -- so that BIOS was
398 * the last user of the controller, not reset/pm hardware keeping
399 * state we gave to it.
400 */
401 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
402 ehci_dbg(ehci, "resume root hub%s\n",
403 power_okay ? "" : " after power loss");
404
405 /* at least some APM implementations will try to deliver
406 * IRQs right away, so delay them until we're ready.
407 */
408 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
409
410 /* re-init operational registers */
411 ehci_writel(ehci, 0, &ehci->regs->segment);
412 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
413 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
414
415 /* restore CMD_RUN, framelist size, and irq threshold */
416 ehci->command |= CMD_RUN;
417 ehci_writel(ehci, ehci->command, &ehci->regs->command);
418 ehci->rh_state = EHCI_RH_RUNNING;
419
420 /*
421 * According to Bugzilla #8190, the port status for some controllers
422 * will be wrong without a delay. At their wrong status, the port
423 * is enabled, but not suspended neither resumed.
424 */
425 i = HCS_N_PORTS(ehci->hcs_params);
426 while (i--) {
427 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
428 if ((temp & PORT_PE) &&
429 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
430 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
431 spin_unlock_irq(&ehci->lock);
432 msleep(8);
433 spin_lock_irq(&ehci->lock);
434 break;
435 }
436 }
437
438 if (ehci->shutdown)
439 goto shutdown;
440
441 /* clear phy low-power mode before resume */
442 if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
443 i = HCS_N_PORTS(ehci->hcs_params);
444 while (i--) {
445 if (test_bit(i, &ehci->bus_suspended)) {
446 u32 __iomem *hostpc_reg =
447 &ehci->regs->hostpc[i];
448
449 temp = ehci_readl(ehci, hostpc_reg);
450 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
451 hostpc_reg);
452 }
453 }
454 spin_unlock_irq(&ehci->lock);
455 msleep(5);
456 spin_lock_irq(&ehci->lock);
457 if (ehci->shutdown)
458 goto shutdown;
459 }
460
461 /* manually resume the ports we suspended during bus_suspend() */
462 i = HCS_N_PORTS (ehci->hcs_params);
463 while (i--) {
464 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
465 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
466 if (test_bit(i, &ehci->bus_suspended) &&
467 (temp & PORT_SUSPEND)) {
468 temp |= PORT_RESUME;
469 set_bit(i, &resume_needed);
470 }
471 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
472 }
473
474 /*
475 * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
476 * port
477 */
478 if (resume_needed) {
479 spin_unlock_irq(&ehci->lock);
480 msleep(USB_RESUME_TIMEOUT);
481 spin_lock_irq(&ehci->lock);
482 if (ehci->shutdown)
483 goto shutdown;
484 }
485
486 i = HCS_N_PORTS (ehci->hcs_params);
487 while (i--) {
488 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
489 if (test_bit(i, &resume_needed)) {
490 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
491 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
492 }
493 }
494
495 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
496 spin_unlock_irq(&ehci->lock);
497
498 ehci_handover_companion_ports(ehci);
499
500 /* Now we can safely re-enable irqs */
501 spin_lock_irq(&ehci->lock);
502 if (ehci->shutdown)
503 goto shutdown;
504 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
505 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
506 spin_unlock_irq(&ehci->lock);
507
508 return 0;
509
510 shutdown:
511 spin_unlock_irq(&ehci->lock);
512 return -ESHUTDOWN;
513 }
514
515 #else
516
517 #define ehci_bus_suspend NULL
518 #define ehci_bus_resume NULL
519
520 #endif /* CONFIG_PM */
521
522 /*-------------------------------------------------------------------------*/
523
524 /*
525 * Sets the owner of a port
526 */
527 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
528 {
529 u32 __iomem *status_reg;
530 u32 port_status;
531 int try;
532
533 status_reg = &ehci->regs->port_status[portnum];
534
535 /*
536 * The controller won't set the OWNER bit if the port is
537 * enabled, so this loop will sometimes require at least two
538 * iterations: one to disable the port and one to set OWNER.
539 */
540 for (try = 4; try > 0; --try) {
541 spin_lock_irq(&ehci->lock);
542 port_status = ehci_readl(ehci, status_reg);
543 if ((port_status & PORT_OWNER) == new_owner
544 || (port_status & (PORT_OWNER | PORT_CONNECT))
545 == 0)
546 try = 0;
547 else {
548 port_status ^= PORT_OWNER;
549 port_status &= ~(PORT_PE | PORT_RWC_BITS);
550 ehci_writel(ehci, port_status, status_reg);
551 }
552 spin_unlock_irq(&ehci->lock);
553 if (try > 1)
554 msleep(5);
555 }
556 }
557
558 /*-------------------------------------------------------------------------*/
559
560 static int check_reset_complete (
561 struct ehci_hcd *ehci,
562 int index,
563 u32 __iomem *status_reg,
564 int port_status
565 ) {
566 if (!(port_status & PORT_CONNECT))
567 return port_status;
568
569 /* if reset finished and it's still not enabled -- handoff */
570 if (!(port_status & PORT_PE)) {
571
572 /* with integrated TT, there's nobody to hand it to! */
573 if (ehci_is_TDI(ehci)) {
574 ehci_dbg (ehci,
575 "Failed to enable port %d on root hub TT\n",
576 index+1);
577 return port_status;
578 }
579
580 ehci_dbg (ehci, "port %d full speed --> companion\n",
581 index + 1);
582
583 // what happens if HCS_N_CC(params) == 0 ?
584 port_status |= PORT_OWNER;
585 port_status &= ~PORT_RWC_BITS;
586 ehci_writel(ehci, port_status, status_reg);
587
588 /* ensure 440EPX ohci controller state is operational */
589 if (ehci->has_amcc_usb23)
590 set_ohci_hcfs(ehci, 1);
591 } else {
592 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
593 index + 1);
594 /* ensure 440EPx ohci controller state is suspended */
595 if (ehci->has_amcc_usb23)
596 set_ohci_hcfs(ehci, 0);
597 }
598
599 return port_status;
600 }
601
602 /*-------------------------------------------------------------------------*/
603
604
605 /* build "status change" packet (one or two bytes) from HC registers */
606
607 static int
608 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
609 {
610 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
611 u32 temp, status;
612 u32 mask;
613 int ports, i, retval = 1;
614 unsigned long flags;
615 u32 ppcd = ~0;
616
617 /* init status to no-changes */
618 buf [0] = 0;
619 ports = HCS_N_PORTS (ehci->hcs_params);
620 if (ports > 7) {
621 buf [1] = 0;
622 retval++;
623 }
624
625 /* Inform the core about resumes-in-progress by returning
626 * a non-zero value even if there are no status changes.
627 */
628 status = ehci->resuming_ports;
629
630 /* Some boards (mostly VIA?) report bogus overcurrent indications,
631 * causing massive log spam unless we completely ignore them. It
632 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
633 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
634 * PORT_POWER; that's surprising, but maybe within-spec.
635 */
636 if (!ignore_oc)
637 mask = PORT_CSC | PORT_PEC | PORT_OCC;
638 else
639 mask = PORT_CSC | PORT_PEC;
640 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
641
642 /* no hub change reports (bit 0) for now (power, ...) */
643
644 /* port N changes (bit N)? */
645 spin_lock_irqsave (&ehci->lock, flags);
646
647 /* get per-port change detect bits */
648 if (ehci->has_ppcd)
649 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
650
651 for (i = 0; i < ports; i++) {
652 /* leverage per-port change bits feature */
653 if (ppcd & (1 << i))
654 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
655 else
656 temp = 0;
657
658 /*
659 * Return status information even for ports with OWNER set.
660 * Otherwise hub_wq wouldn't see the disconnect event when a
661 * high-speed device is switched over to the companion
662 * controller by the user.
663 */
664
665 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
666 || (ehci->reset_done[i] && time_after_eq(
667 jiffies, ehci->reset_done[i]))) {
668 if (i < 7)
669 buf [0] |= 1 << (i + 1);
670 else
671 buf [1] |= 1 << (i - 7);
672 status = STS_PCD;
673 }
674 }
675
676 /* If a resume is in progress, make sure it can finish */
677 if (ehci->resuming_ports)
678 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
679
680 spin_unlock_irqrestore (&ehci->lock, flags);
681 return status ? retval : 0;
682 }
683
684 /*-------------------------------------------------------------------------*/
685
686 static void
687 ehci_hub_descriptor (
688 struct ehci_hcd *ehci,
689 struct usb_hub_descriptor *desc
690 ) {
691 int ports = HCS_N_PORTS (ehci->hcs_params);
692 u16 temp;
693
694 desc->bDescriptorType = USB_DT_HUB;
695 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
696 desc->bHubContrCurrent = 0;
697
698 desc->bNbrPorts = ports;
699 temp = 1 + (ports / 8);
700 desc->bDescLength = 7 + 2 * temp;
701
702 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
703 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
704 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
705
706 temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
707 if (HCS_PPC (ehci->hcs_params))
708 temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */
709 else
710 temp |= HUB_CHAR_NO_LPSM; /* no power switching */
711 #if 0
712 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
713 if (HCS_INDICATOR (ehci->hcs_params))
714 temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */
715 #endif
716 desc->wHubCharacteristics = cpu_to_le16(temp);
717 }
718
719 /*-------------------------------------------------------------------------*/
720 #ifdef CONFIG_USB_HCD_TEST_MODE
721
722 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
723
724 static void usb_ehset_completion(struct urb *urb)
725 {
726 struct completion *done = urb->context;
727
728 complete(done);
729 }
730 static int submit_single_step_set_feature(
731 struct usb_hcd *hcd,
732 struct urb *urb,
733 int is_setup
734 );
735
736 /*
737 * Allocate and initialize a control URB. This request will be used by the
738 * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
739 * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
740 * Return NULL if failed.
741 */
742 static struct urb *request_single_step_set_feature_urb(
743 struct usb_device *udev,
744 void *dr,
745 void *buf,
746 struct completion *done
747 ) {
748 struct urb *urb;
749 struct usb_hcd *hcd = bus_to_hcd(udev->bus);
750 struct usb_host_endpoint *ep;
751
752 urb = usb_alloc_urb(0, GFP_KERNEL);
753 if (!urb)
754 return NULL;
755
756 urb->pipe = usb_rcvctrlpipe(udev, 0);
757 ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
758 [usb_pipeendpoint(urb->pipe)];
759 if (!ep) {
760 usb_free_urb(urb);
761 return NULL;
762 }
763
764 urb->ep = ep;
765 urb->dev = udev;
766 urb->setup_packet = (void *)dr;
767 urb->transfer_buffer = buf;
768 urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
769 urb->complete = usb_ehset_completion;
770 urb->status = -EINPROGRESS;
771 urb->actual_length = 0;
772 urb->transfer_flags = URB_DIR_IN;
773 usb_get_urb(urb);
774 atomic_inc(&urb->use_count);
775 atomic_inc(&urb->dev->urbnum);
776 urb->setup_dma = dma_map_single(
777 hcd->self.sysdev,
778 urb->setup_packet,
779 sizeof(struct usb_ctrlrequest),
780 DMA_TO_DEVICE);
781 urb->transfer_dma = dma_map_single(
782 hcd->self.sysdev,
783 urb->transfer_buffer,
784 urb->transfer_buffer_length,
785 DMA_FROM_DEVICE);
786 urb->context = done;
787 return urb;
788 }
789
790 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
791 {
792 int retval = -ENOMEM;
793 struct usb_ctrlrequest *dr;
794 struct urb *urb;
795 struct usb_device *udev;
796 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
797 struct usb_device_descriptor *buf;
798 DECLARE_COMPLETION_ONSTACK(done);
799
800 /* Obtain udev of the rhub's child port */
801 udev = usb_hub_find_child(hcd->self.root_hub, port);
802 if (!udev) {
803 ehci_err(ehci, "No device attached to the RootHub\n");
804 return -ENODEV;
805 }
806 buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
807 if (!buf)
808 return -ENOMEM;
809
810 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
811 if (!dr) {
812 kfree(buf);
813 return -ENOMEM;
814 }
815
816 /* Fill Setup packet for GetDescriptor */
817 dr->bRequestType = USB_DIR_IN;
818 dr->bRequest = USB_REQ_GET_DESCRIPTOR;
819 dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
820 dr->wIndex = 0;
821 dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
822 urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
823 if (!urb)
824 goto cleanup;
825
826 /* Submit just the SETUP stage */
827 retval = submit_single_step_set_feature(hcd, urb, 1);
828 if (retval)
829 goto out1;
830 if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
831 usb_kill_urb(urb);
832 retval = -ETIMEDOUT;
833 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
834 goto out1;
835 }
836 msleep(15 * 1000);
837
838 /* Complete remaining DATA and STATUS stages using the same URB */
839 urb->status = -EINPROGRESS;
840 usb_get_urb(urb);
841 atomic_inc(&urb->use_count);
842 atomic_inc(&urb->dev->urbnum);
843 retval = submit_single_step_set_feature(hcd, urb, 0);
844 if (!retval && !wait_for_completion_timeout(&done,
845 msecs_to_jiffies(2000))) {
846 usb_kill_urb(urb);
847 retval = -ETIMEDOUT;
848 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
849 }
850 out1:
851 usb_free_urb(urb);
852 cleanup:
853 kfree(dr);
854 kfree(buf);
855 return retval;
856 }
857 #endif /* CONFIG_USB_HCD_TEST_MODE */
858 /*-------------------------------------------------------------------------*/
859
860 int ehci_hub_control(
861 struct usb_hcd *hcd,
862 u16 typeReq,
863 u16 wValue,
864 u16 wIndex,
865 char *buf,
866 u16 wLength
867 ) {
868 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
869 int ports = HCS_N_PORTS (ehci->hcs_params);
870 u32 __iomem *status_reg, *hostpc_reg;
871 u32 temp, temp1, status;
872 unsigned long flags;
873 int retval = 0;
874 unsigned selector;
875
876 /*
877 * Avoid underflow while calculating (wIndex & 0xff) - 1.
878 * The compiler might deduce that wIndex can never be 0 and then
879 * optimize away the tests for !wIndex below.
880 */
881 temp = wIndex & 0xff;
882 temp -= (temp > 0);
883 status_reg = &ehci->regs->port_status[temp];
884 hostpc_reg = &ehci->regs->hostpc[temp];
885
886 /*
887 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
888 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
889 * (track current state ourselves) ... blink for diagnostics,
890 * power, "this is the one", etc. EHCI spec supports this.
891 */
892
893 spin_lock_irqsave (&ehci->lock, flags);
894 switch (typeReq) {
895 case ClearHubFeature:
896 switch (wValue) {
897 case C_HUB_LOCAL_POWER:
898 case C_HUB_OVER_CURRENT:
899 /* no hub-wide feature/status flags */
900 break;
901 default:
902 goto error;
903 }
904 break;
905 case ClearPortFeature:
906 if (!wIndex || wIndex > ports)
907 goto error;
908 wIndex--;
909 temp = ehci_readl(ehci, status_reg);
910 temp &= ~PORT_RWC_BITS;
911
912 /*
913 * Even if OWNER is set, so the port is owned by the
914 * companion controller, hub_wq needs to be able to clear
915 * the port-change status bits (especially
916 * USB_PORT_STAT_C_CONNECTION).
917 */
918
919 switch (wValue) {
920 case USB_PORT_FEAT_ENABLE:
921 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
922 break;
923 case USB_PORT_FEAT_C_ENABLE:
924 ehci_writel(ehci, temp | PORT_PEC, status_reg);
925 break;
926 case USB_PORT_FEAT_SUSPEND:
927 if (temp & PORT_RESET)
928 goto error;
929 if (ehci->no_selective_suspend)
930 break;
931 #ifdef CONFIG_USB_OTG
932 if ((hcd->self.otg_port == (wIndex + 1))
933 && hcd->self.b_hnp_enable) {
934 otg_start_hnp(hcd->usb_phy->otg);
935 break;
936 }
937 #endif
938 if (!(temp & PORT_SUSPEND))
939 break;
940 if ((temp & PORT_PE) == 0)
941 goto error;
942
943 /* clear phy low-power mode before resume */
944 if (ehci->has_tdi_phy_lpm) {
945 temp1 = ehci_readl(ehci, hostpc_reg);
946 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
947 hostpc_reg);
948 spin_unlock_irqrestore(&ehci->lock, flags);
949 msleep(5);/* wait to leave low-power mode */
950 spin_lock_irqsave(&ehci->lock, flags);
951 }
952 /* resume signaling for 20 msec */
953 temp &= ~PORT_WAKE_BITS;
954 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
955 ehci->reset_done[wIndex] = jiffies
956 + msecs_to_jiffies(USB_RESUME_TIMEOUT);
957 set_bit(wIndex, &ehci->resuming_ports);
958 usb_hcd_start_port_resume(&hcd->self, wIndex);
959 break;
960 case USB_PORT_FEAT_C_SUSPEND:
961 clear_bit(wIndex, &ehci->port_c_suspend);
962 break;
963 case USB_PORT_FEAT_POWER:
964 if (HCS_PPC(ehci->hcs_params)) {
965 spin_unlock_irqrestore(&ehci->lock, flags);
966 ehci_port_power(ehci, wIndex, false);
967 spin_lock_irqsave(&ehci->lock, flags);
968 }
969 break;
970 case USB_PORT_FEAT_C_CONNECTION:
971 ehci_writel(ehci, temp | PORT_CSC, status_reg);
972 break;
973 case USB_PORT_FEAT_C_OVER_CURRENT:
974 ehci_writel(ehci, temp | PORT_OCC, status_reg);
975 break;
976 case USB_PORT_FEAT_C_RESET:
977 /* GetPortStatus clears reset */
978 break;
979 default:
980 goto error;
981 }
982 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
983 break;
984 case GetHubDescriptor:
985 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
986 buf);
987 break;
988 case GetHubStatus:
989 /* no hub-wide feature/status flags */
990 memset (buf, 0, 4);
991 //cpu_to_le32s ((u32 *) buf);
992 break;
993 case GetPortStatus:
994 if (!wIndex || wIndex > ports)
995 goto error;
996 wIndex--;
997 status = 0;
998 temp = ehci_readl(ehci, status_reg);
999
1000 // wPortChange bits
1001 if (temp & PORT_CSC)
1002 status |= USB_PORT_STAT_C_CONNECTION << 16;
1003 if (temp & PORT_PEC)
1004 status |= USB_PORT_STAT_C_ENABLE << 16;
1005
1006 if ((temp & PORT_OCC) && !ignore_oc){
1007 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1008
1009 /*
1010 * Hubs should disable port power on over-current.
1011 * However, not all EHCI implementations do this
1012 * automatically, even if they _do_ support per-port
1013 * power switching; they're allowed to just limit the
1014 * current. hub_wq will turn the power back on.
1015 */
1016 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1017 && HCS_PPC(ehci->hcs_params)) {
1018 spin_unlock_irqrestore(&ehci->lock, flags);
1019 ehci_port_power(ehci, wIndex, false);
1020 spin_lock_irqsave(&ehci->lock, flags);
1021 temp = ehci_readl(ehci, status_reg);
1022 }
1023 }
1024
1025 /* no reset or resume pending */
1026 if (!ehci->reset_done[wIndex]) {
1027
1028 /* Remote Wakeup received? */
1029 if (temp & PORT_RESUME) {
1030 /* resume signaling for 20 msec */
1031 ehci->reset_done[wIndex] = jiffies
1032 + msecs_to_jiffies(20);
1033 usb_hcd_start_port_resume(&hcd->self, wIndex);
1034 set_bit(wIndex, &ehci->resuming_ports);
1035 /* check the port again */
1036 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
1037 ehci->reset_done[wIndex]);
1038 }
1039
1040 /* reset or resume not yet complete */
1041 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
1042 ; /* wait until it is complete */
1043
1044 /* resume completed */
1045 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
1046 clear_bit(wIndex, &ehci->suspended_ports);
1047 set_bit(wIndex, &ehci->port_c_suspend);
1048 ehci->reset_done[wIndex] = 0;
1049 usb_hcd_end_port_resume(&hcd->self, wIndex);
1050
1051 /* stop resume signaling */
1052 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
1053 ehci_writel(ehci, temp, status_reg);
1054 clear_bit(wIndex, &ehci->resuming_ports);
1055 retval = ehci_handshake(ehci, status_reg,
1056 PORT_RESUME, 0, 2000 /* 2msec */);
1057 if (retval != 0) {
1058 ehci_err(ehci, "port %d resume error %d\n",
1059 wIndex + 1, retval);
1060 goto error;
1061 }
1062 temp = ehci_readl(ehci, status_reg);
1063
1064 /* whoever resets must GetPortStatus to complete it!! */
1065 } else {
1066 status |= USB_PORT_STAT_C_RESET << 16;
1067 ehci->reset_done [wIndex] = 0;
1068
1069 /* force reset to complete */
1070 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
1071 status_reg);
1072 /* REVISIT: some hardware needs 550+ usec to clear
1073 * this bit; seems too long to spin routinely...
1074 */
1075 retval = ehci_handshake(ehci, status_reg,
1076 PORT_RESET, 0, 1000);
1077 if (retval != 0) {
1078 ehci_err (ehci, "port %d reset error %d\n",
1079 wIndex + 1, retval);
1080 goto error;
1081 }
1082
1083 /* see what we found out */
1084 temp = check_reset_complete (ehci, wIndex, status_reg,
1085 ehci_readl(ehci, status_reg));
1086 }
1087
1088 /* transfer dedicated ports to the companion hc */
1089 if ((temp & PORT_CONNECT) &&
1090 test_bit(wIndex, &ehci->companion_ports)) {
1091 temp &= ~PORT_RWC_BITS;
1092 temp |= PORT_OWNER;
1093 ehci_writel(ehci, temp, status_reg);
1094 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
1095 temp = ehci_readl(ehci, status_reg);
1096 }
1097
1098 /*
1099 * Even if OWNER is set, there's no harm letting hub_wq
1100 * see the wPortStatus values (they should all be 0 except
1101 * for PORT_POWER anyway).
1102 */
1103
1104 if (temp & PORT_CONNECT) {
1105 status |= USB_PORT_STAT_CONNECTION;
1106 // status may be from integrated TT
1107 if (ehci->has_hostpc) {
1108 temp1 = ehci_readl(ehci, hostpc_reg);
1109 status |= ehci_port_speed(ehci, temp1);
1110 } else
1111 status |= ehci_port_speed(ehci, temp);
1112 }
1113 if (temp & PORT_PE)
1114 status |= USB_PORT_STAT_ENABLE;
1115
1116 /* maybe the port was unsuspended without our knowledge */
1117 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
1118 status |= USB_PORT_STAT_SUSPEND;
1119 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1120 clear_bit(wIndex, &ehci->suspended_ports);
1121 clear_bit(wIndex, &ehci->resuming_ports);
1122 ehci->reset_done[wIndex] = 0;
1123 if (temp & PORT_PE)
1124 set_bit(wIndex, &ehci->port_c_suspend);
1125 usb_hcd_end_port_resume(&hcd->self, wIndex);
1126 }
1127
1128 if (temp & PORT_OC)
1129 status |= USB_PORT_STAT_OVERCURRENT;
1130 if (temp & PORT_RESET)
1131 status |= USB_PORT_STAT_RESET;
1132 if (temp & PORT_POWER)
1133 status |= USB_PORT_STAT_POWER;
1134 if (test_bit(wIndex, &ehci->port_c_suspend))
1135 status |= USB_PORT_STAT_C_SUSPEND << 16;
1136
1137 if (status & ~0xffff) /* only if wPortChange is interesting */
1138 dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1139 put_unaligned_le32(status, buf);
1140 break;
1141 case SetHubFeature:
1142 switch (wValue) {
1143 case C_HUB_LOCAL_POWER:
1144 case C_HUB_OVER_CURRENT:
1145 /* no hub-wide feature/status flags */
1146 break;
1147 default:
1148 goto error;
1149 }
1150 break;
1151 case SetPortFeature:
1152 selector = wIndex >> 8;
1153 wIndex &= 0xff;
1154 if (unlikely(ehci->debug)) {
1155 /* If the debug port is active any port
1156 * feature requests should get denied */
1157 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1158 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1159 retval = -ENODEV;
1160 goto error_exit;
1161 }
1162 }
1163 if (!wIndex || wIndex > ports)
1164 goto error;
1165 wIndex--;
1166 temp = ehci_readl(ehci, status_reg);
1167 if (temp & PORT_OWNER)
1168 break;
1169
1170 temp &= ~PORT_RWC_BITS;
1171 switch (wValue) {
1172 case USB_PORT_FEAT_SUSPEND:
1173 if (ehci->no_selective_suspend)
1174 break;
1175 if ((temp & PORT_PE) == 0
1176 || (temp & PORT_RESET) != 0)
1177 goto error;
1178
1179 /* After above check the port must be connected.
1180 * Set appropriate bit thus could put phy into low power
1181 * mode if we have tdi_phy_lpm feature
1182 */
1183 temp &= ~PORT_WKCONN_E;
1184 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1185 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1186 if (ehci->has_tdi_phy_lpm) {
1187 spin_unlock_irqrestore(&ehci->lock, flags);
1188 msleep(5);/* 5ms for HCD enter low pwr mode */
1189 spin_lock_irqsave(&ehci->lock, flags);
1190 temp1 = ehci_readl(ehci, hostpc_reg);
1191 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1192 hostpc_reg);
1193 temp1 = ehci_readl(ehci, hostpc_reg);
1194 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1195 wIndex, (temp1 & HOSTPC_PHCD) ?
1196 "succeeded" : "failed");
1197 }
1198 if (ehci_has_fsl_susp_errata(ehci)) {
1199 /* 10ms for HCD enter suspend */
1200 spin_unlock_irqrestore(&ehci->lock, flags);
1201 usleep_range(10000, 20000);
1202 spin_lock_irqsave(&ehci->lock, flags);
1203 }
1204 set_bit(wIndex, &ehci->suspended_ports);
1205 break;
1206 case USB_PORT_FEAT_POWER:
1207 if (HCS_PPC(ehci->hcs_params)) {
1208 spin_unlock_irqrestore(&ehci->lock, flags);
1209 ehci_port_power(ehci, wIndex, true);
1210 spin_lock_irqsave(&ehci->lock, flags);
1211 }
1212 break;
1213 case USB_PORT_FEAT_RESET:
1214 if (temp & (PORT_SUSPEND|PORT_RESUME))
1215 goto error;
1216 /* line status bits may report this as low speed,
1217 * which can be fine if this root hub has a
1218 * transaction translator built in.
1219 */
1220 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1221 && !ehci_is_TDI(ehci)
1222 && PORT_USB11 (temp)) {
1223 ehci_dbg (ehci,
1224 "port %d low speed --> companion\n",
1225 wIndex + 1);
1226 temp |= PORT_OWNER;
1227 } else {
1228 temp |= PORT_RESET;
1229 temp &= ~PORT_PE;
1230
1231 /*
1232 * caller must wait, then call GetPortStatus
1233 * usb 2.0 spec says 50 ms resets on root
1234 */
1235 ehci->reset_done [wIndex] = jiffies
1236 + msecs_to_jiffies (50);
1237
1238 /*
1239 * Force full-speed connect for FSL high-speed
1240 * erratum; disable HS Chirp by setting PFSC bit
1241 */
1242 if (ehci_has_fsl_hs_errata(ehci))
1243 temp |= (1 << PORTSC_FSL_PFSC);
1244 }
1245 ehci_writel(ehci, temp, status_reg);
1246 break;
1247
1248 /* For downstream facing ports (these): one hub port is put
1249 * into test mode according to USB2 11.24.2.13, then the hub
1250 * must be reset (which for root hub now means rmmod+modprobe,
1251 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1252 * about the EHCI-specific stuff.
1253 */
1254 case USB_PORT_FEAT_TEST:
1255 #ifdef CONFIG_USB_HCD_TEST_MODE
1256 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1257 spin_unlock_irqrestore(&ehci->lock, flags);
1258 retval = ehset_single_step_set_feature(hcd,
1259 wIndex + 1);
1260 spin_lock_irqsave(&ehci->lock, flags);
1261 break;
1262 }
1263 #endif
1264 if (!selector || selector > 5)
1265 goto error;
1266 spin_unlock_irqrestore(&ehci->lock, flags);
1267 ehci_quiesce(ehci);
1268 spin_lock_irqsave(&ehci->lock, flags);
1269
1270 /* Put all enabled ports into suspend */
1271 while (ports--) {
1272 u32 __iomem *sreg =
1273 &ehci->regs->port_status[ports];
1274
1275 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1276 if (temp & PORT_PE)
1277 ehci_writel(ehci, temp | PORT_SUSPEND,
1278 sreg);
1279 }
1280
1281 spin_unlock_irqrestore(&ehci->lock, flags);
1282 ehci_halt(ehci);
1283 spin_lock_irqsave(&ehci->lock, flags);
1284
1285 temp = ehci_readl(ehci, status_reg);
1286 temp |= selector << 16;
1287 ehci_writel(ehci, temp, status_reg);
1288 break;
1289
1290 default:
1291 goto error;
1292 }
1293 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1294 break;
1295
1296 default:
1297 error:
1298 /* "stall" on error */
1299 retval = -EPIPE;
1300 }
1301 error_exit:
1302 spin_unlock_irqrestore (&ehci->lock, flags);
1303 return retval;
1304 }
1305 EXPORT_SYMBOL_GPL(ehci_hub_control);
1306
1307 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1308 {
1309 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1310
1311 if (ehci_is_TDI(ehci))
1312 return;
1313 set_owner(ehci, --portnum, PORT_OWNER);
1314 }
1315
1316 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1317 {
1318 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1319 u32 __iomem *reg;
1320
1321 if (ehci_is_TDI(ehci))
1322 return 0;
1323 reg = &ehci->regs->port_status[portnum - 1];
1324 return ehci_readl(ehci, reg) & PORT_OWNER;
1325 }
1326
1327 static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable)
1328 {
1329 struct usb_hcd *hcd = ehci_to_hcd(ehci);
1330 u32 __iomem *status_reg = &ehci->regs->port_status[portnum];
1331 u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
1332
1333 if (enable)
1334 ehci_writel(ehci, temp | PORT_POWER, status_reg);
1335 else
1336 ehci_writel(ehci, temp & ~PORT_POWER, status_reg);
1337
1338 if (hcd->driver->port_power)
1339 hcd->driver->port_power(hcd, portnum, enable);
1340
1341 return 0;
1342 }
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