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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
18#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
19
20#ifdef CONFIG_PM
21
22static void unlink_empty_async_suspended(struct ehci_hcd *ehci);
23
24static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
25{
26 return !udev->maxchild && udev->persist_enabled &&
27 udev->bus->root_hub->speed < USB_SPEED_HIGH;
28}
29
30/* After a power loss, ports that were owned by the companion must be
31 * reset so that the companion can still own them.
32 */
33static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
34{
35 u32 __iomem *reg;
36 u32 status;
37 int port;
38 __le32 buf;
39 struct usb_hcd *hcd = ehci_to_hcd(ehci);
40
41 if (!ehci->owned_ports)
42 return;
43
44 /*
45 * USB 1.1 devices are mostly HIDs, which don't need to persist across
46 * suspends. If we ensure that none of our companion's devices have
47 * persist_enabled (by looking through all USB 1.1 buses in the system),
48 * we can skip this and avoid slowing resume down. Devices without
49 * persist will just get reenumerated shortly after resume anyway.
50 */
51 if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
52 return;
53
54 /* Make sure the ports are powered */
55 port = HCS_N_PORTS(ehci->hcs_params);
56 while (port--) {
57 if (test_bit(port, &ehci->owned_ports)) {
58 reg = &ehci->regs->port_status[port];
59 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
60 if (!(status & PORT_POWER))
61 ehci_port_power(ehci, port, true);
62 }
63 }
64
65 /* Give the connections some time to appear */
66 msleep(20);
67
68 spin_lock_irq(&ehci->lock);
69 port = HCS_N_PORTS(ehci->hcs_params);
70 while (port--) {
71 if (test_bit(port, &ehci->owned_ports)) {
72 reg = &ehci->regs->port_status[port];
73 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
74
75 /* Port already owned by companion? */
76 if (status & PORT_OWNER)
77 clear_bit(port, &ehci->owned_ports);
78 else if (test_bit(port, &ehci->companion_ports))
79 ehci_writel(ehci, status & ~PORT_PE, reg);
80 else {
81 spin_unlock_irq(&ehci->lock);
82 ehci_hub_control(hcd, SetPortFeature,
83 USB_PORT_FEAT_RESET, port + 1,
84 NULL, 0);
85 spin_lock_irq(&ehci->lock);
86 }
87 }
88 }
89 spin_unlock_irq(&ehci->lock);
90
91 if (!ehci->owned_ports)
92 return;
93 msleep(90); /* Wait for resets to complete */
94
95 spin_lock_irq(&ehci->lock);
96 port = HCS_N_PORTS(ehci->hcs_params);
97 while (port--) {
98 if (test_bit(port, &ehci->owned_ports)) {
99 spin_unlock_irq(&ehci->lock);
100 ehci_hub_control(hcd, GetPortStatus,
101 0, port + 1,
102 (char *) &buf, sizeof(buf));
103 spin_lock_irq(&ehci->lock);
104
105 /* The companion should now own the port,
106 * but if something went wrong the port must not
107 * remain enabled.
108 */
109 reg = &ehci->regs->port_status[port];
110 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
111 if (status & PORT_OWNER)
112 ehci_writel(ehci, status | PORT_CSC, reg);
113 else {
114 ehci_dbg(ehci, "failed handover port %d: %x\n",
115 port + 1, status);
116 ehci_writel(ehci, status & ~PORT_PE, reg);
117 }
118 }
119 }
120
121 ehci->owned_ports = 0;
122 spin_unlock_irq(&ehci->lock);
123}
124
125static int ehci_port_change(struct ehci_hcd *ehci)
126{
127 int i = HCS_N_PORTS(ehci->hcs_params);
128
129 /* First check if the controller indicates a change event */
130
131 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
132 return 1;
133
134 /*
135 * Not all controllers appear to update this while going from D3 to D0,
136 * so check the individual port status registers as well
137 */
138
139 while (i--)
140 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
141 return 1;
142
143 return 0;
144}
145
146void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
147 bool suspending, bool do_wakeup)
148{
149 int port;
150 u32 temp;
151
152 /* If remote wakeup is enabled for the root hub but disabled
153 * for the controller, we must adjust all the port wakeup flags
154 * when the controller is suspended or resumed. In all other
155 * cases they don't need to be changed.
156 */
157 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
158 return;
159
160 spin_lock_irq(&ehci->lock);
161
162 /* clear phy low-power mode before changing wakeup flags */
163 if (ehci->has_tdi_phy_lpm) {
164 port = HCS_N_PORTS(ehci->hcs_params);
165 while (port--) {
166 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
167
168 temp = ehci_readl(ehci, hostpc_reg);
169 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
170 }
171 spin_unlock_irq(&ehci->lock);
172 msleep(5);
173 spin_lock_irq(&ehci->lock);
174 }
175
176 port = HCS_N_PORTS(ehci->hcs_params);
177 while (port--) {
178 u32 __iomem *reg = &ehci->regs->port_status[port];
179 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
180 u32 t2 = t1 & ~PORT_WAKE_BITS;
181
182 /* If we are suspending the controller, clear the flags.
183 * If we are resuming the controller, set the wakeup flags.
184 */
185 if (!suspending) {
186 if (t1 & PORT_CONNECT)
187 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
188 else
189 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
190 }
191 ehci_writel(ehci, t2, reg);
192 }
193
194 /* enter phy low-power mode again */
195 if (ehci->has_tdi_phy_lpm) {
196 port = HCS_N_PORTS(ehci->hcs_params);
197 while (port--) {
198 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
199
200 temp = ehci_readl(ehci, hostpc_reg);
201 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
202 }
203 }
204
205 /* Does the root hub have a port wakeup pending? */
206 if (!suspending && ehci_port_change(ehci))
207 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
208
209 spin_unlock_irq(&ehci->lock);
210}
211EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags);
212
213static int ehci_bus_suspend (struct usb_hcd *hcd)
214{
215 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
216 int port;
217 int mask;
218 int changed;
219 bool fs_idle_delay;
220
221 ehci_dbg(ehci, "suspend root hub\n");
222
223 if (time_before (jiffies, ehci->next_statechange))
224 msleep(5);
225
226 /* stop the schedules */
227 ehci_quiesce(ehci);
228
229 spin_lock_irq (&ehci->lock);
230 if (ehci->rh_state < EHCI_RH_RUNNING)
231 goto done;
232
233 /* Once the controller is stopped, port resumes that are already
234 * in progress won't complete. Hence if remote wakeup is enabled
235 * for the root hub and any ports are in the middle of a resume or
236 * remote wakeup, we must fail the suspend.
237 */
238 if (hcd->self.root_hub->do_remote_wakeup) {
239 if (ehci->resuming_ports) {
240 spin_unlock_irq(&ehci->lock);
241 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
242 return -EBUSY;
243 }
244 }
245
246 /* Unlike other USB host controller types, EHCI doesn't have
247 * any notion of "global" or bus-wide suspend. The driver has
248 * to manually suspend all the active unsuspended ports, and
249 * then manually resume them in the bus_resume() routine.
250 */
251 ehci->bus_suspended = 0;
252 ehci->owned_ports = 0;
253 changed = 0;
254 fs_idle_delay = false;
255 port = HCS_N_PORTS(ehci->hcs_params);
256 while (port--) {
257 u32 __iomem *reg = &ehci->regs->port_status [port];
258 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
259 u32 t2 = t1 & ~PORT_WAKE_BITS;
260
261 /* keep track of which ports we suspend */
262 if (t1 & PORT_OWNER)
263 set_bit(port, &ehci->owned_ports);
264 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
265 t2 |= PORT_SUSPEND;
266 set_bit(port, &ehci->bus_suspended);
267 }
268
269 /* enable remote wakeup on all ports, if told to do so */
270 if (hcd->self.root_hub->do_remote_wakeup) {
271 /* only enable appropriate wake bits, otherwise the
272 * hardware can not go phy low power mode. If a race
273 * condition happens here(connection change during bits
274 * set), the port change detection will finally fix it.
275 */
276 if (t1 & PORT_CONNECT)
277 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
278 else
279 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
280 }
281
282 if (t1 != t2) {
283 /*
284 * On some controllers, Wake-On-Disconnect will
285 * generate false wakeup signals until the bus
286 * switches over to full-speed idle. For their
287 * sake, add a delay if we need one.
288 */
289 if ((t2 & PORT_WKDISC_E) &&
290 ehci_port_speed(ehci, t2) ==
291 USB_PORT_STAT_HIGH_SPEED)
292 fs_idle_delay = true;
293 ehci_writel(ehci, t2, reg);
294 changed = 1;
295 }
296 }
297 spin_unlock_irq(&ehci->lock);
298
299 if (changed && ehci_has_fsl_susp_errata(ehci))
300 /*
301 * Wait for at least 10 millisecondes to ensure the controller
302 * enter the suspend status before initiating a port resume
303 * using the Force Port Resume bit (Not-EHCI compatible).
304 */
305 usleep_range(10000, 20000);
306
307 if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
308 /*
309 * Wait for HCD to enter low-power mode or for the bus
310 * to switch to full-speed idle.
311 */
312 usleep_range(5000, 5500);
313 }
314
315 if (changed && ehci->has_tdi_phy_lpm) {
316 spin_lock_irq(&ehci->lock);
317 port = HCS_N_PORTS(ehci->hcs_params);
318 while (port--) {
319 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
320 u32 t3;
321
322 t3 = ehci_readl(ehci, hostpc_reg);
323 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
324 t3 = ehci_readl(ehci, hostpc_reg);
325 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
326 port, (t3 & HOSTPC_PHCD) ?
327 "succeeded" : "failed");
328 }
329 spin_unlock_irq(&ehci->lock);
330 }
331
332 /* Apparently some devices need a >= 1-uframe delay here */
333 if (ehci->bus_suspended)
334 udelay(150);
335
336 /* turn off now-idle HC */
337 ehci_halt (ehci);
338
339 spin_lock_irq(&ehci->lock);
340 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
341 ehci_handle_controller_death(ehci);
342 if (ehci->rh_state != EHCI_RH_RUNNING)
343 goto done;
344 ehci->rh_state = EHCI_RH_SUSPENDED;
345
346 unlink_empty_async_suspended(ehci);
347
348 /* Some Synopsys controllers mistakenly leave IAA turned on */
349 ehci_writel(ehci, STS_IAA, &ehci->regs->status);
350
351 /* Any IAA cycle that started before the suspend is now invalid */
352 end_iaa_cycle(ehci);
353 ehci_handle_start_intr_unlinks(ehci);
354 ehci_handle_intr_unlinks(ehci);
355 end_free_itds(ehci);
356
357 /* allow remote wakeup */
358 mask = INTR_MASK;
359 if (!hcd->self.root_hub->do_remote_wakeup)
360 mask &= ~STS_PCD;
361 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
362 ehci_readl(ehci, &ehci->regs->intr_enable);
363
364 done:
365 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
366 ehci->enabled_hrtimer_events = 0;
367 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
368 spin_unlock_irq (&ehci->lock);
369
370 hrtimer_cancel(&ehci->hrtimer);
371 return 0;
372}
373
374
375/* caller has locked the root hub, and should reset/reinit on error */
376static int ehci_bus_resume (struct usb_hcd *hcd)
377{
378 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
379 u32 temp;
380 u32 power_okay;
381 int i;
382 unsigned long resume_needed = 0;
383
384 if (time_before (jiffies, ehci->next_statechange))
385 msleep(5);
386 spin_lock_irq (&ehci->lock);
387 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
388 goto shutdown;
389
390 if (unlikely(ehci->debug)) {
391 if (!dbgp_reset_prep(hcd))
392 ehci->debug = NULL;
393 else
394 dbgp_external_startup(hcd);
395 }
396
397 /* Ideally and we've got a real resume here, and no port's power
398 * was lost. (For PCI, that means Vaux was maintained.) But we
399 * could instead be restoring a swsusp snapshot -- so that BIOS was
400 * the last user of the controller, not reset/pm hardware keeping
401 * state we gave to it.
402 */
403 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
404 ehci_dbg(ehci, "resume root hub%s\n",
405 power_okay ? "" : " after power loss");
406
407 /* at least some APM implementations will try to deliver
408 * IRQs right away, so delay them until we're ready.
409 */
410 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
411
412 /* re-init operational registers */
413 ehci_writel(ehci, 0, &ehci->regs->segment);
414 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
415 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
416
417 /* restore CMD_RUN, framelist size, and irq threshold */
418 ehci->command |= CMD_RUN;
419 ehci_writel(ehci, ehci->command, &ehci->regs->command);
420 ehci->rh_state = EHCI_RH_RUNNING;
421
422 /*
423 * According to Bugzilla #8190, the port status for some controllers
424 * will be wrong without a delay. At their wrong status, the port
425 * is enabled, but not suspended neither resumed.
426 */
427 i = HCS_N_PORTS(ehci->hcs_params);
428 while (i--) {
429 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
430 if ((temp & PORT_PE) &&
431 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
432 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
433 spin_unlock_irq(&ehci->lock);
434 msleep(8);
435 spin_lock_irq(&ehci->lock);
436 break;
437 }
438 }
439
440 if (ehci->shutdown)
441 goto shutdown;
442
443 /* clear phy low-power mode before resume */
444 if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
445 i = HCS_N_PORTS(ehci->hcs_params);
446 while (i--) {
447 if (test_bit(i, &ehci->bus_suspended)) {
448 u32 __iomem *hostpc_reg =
449 &ehci->regs->hostpc[i];
450
451 temp = ehci_readl(ehci, hostpc_reg);
452 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
453 hostpc_reg);
454 }
455 }
456 spin_unlock_irq(&ehci->lock);
457 msleep(5);
458 spin_lock_irq(&ehci->lock);
459 if (ehci->shutdown)
460 goto shutdown;
461 }
462
463 /* manually resume the ports we suspended during bus_suspend() */
464 i = HCS_N_PORTS (ehci->hcs_params);
465 while (i--) {
466 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
467 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
468 if (test_bit(i, &ehci->bus_suspended) &&
469 (temp & PORT_SUSPEND)) {
470 temp |= PORT_RESUME;
471 set_bit(i, &resume_needed);
472 }
473 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
474 }
475
476 /*
477 * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
478 * port
479 */
480 if (resume_needed) {
481 spin_unlock_irq(&ehci->lock);
482 msleep(USB_RESUME_TIMEOUT);
483 spin_lock_irq(&ehci->lock);
484 if (ehci->shutdown)
485 goto shutdown;
486 }
487
488 i = HCS_N_PORTS (ehci->hcs_params);
489 while (i--) {
490 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
491 if (test_bit(i, &resume_needed)) {
492 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
493 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
494 }
495 }
496
497 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
498 spin_unlock_irq(&ehci->lock);
499
500 ehci_handover_companion_ports(ehci);
501
502 /* Now we can safely re-enable irqs */
503 spin_lock_irq(&ehci->lock);
504 if (ehci->shutdown)
505 goto shutdown;
506 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
507 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
508 spin_unlock_irq(&ehci->lock);
509
510 return 0;
511
512 shutdown:
513 spin_unlock_irq(&ehci->lock);
514 return -ESHUTDOWN;
515}
516
517static unsigned long ehci_get_resuming_ports(struct usb_hcd *hcd)
518{
519 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
520
521 return ehci->resuming_ports;
522}
523
524#else
525
526#define ehci_bus_suspend NULL
527#define ehci_bus_resume NULL
528#define ehci_get_resuming_ports NULL
529
530#endif /* CONFIG_PM */
531
532/*-------------------------------------------------------------------------*/
533
534/*
535 * Sets the owner of a port
536 */
537static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
538{
539 u32 __iomem *status_reg;
540 u32 port_status;
541 int try;
542
543 status_reg = &ehci->regs->port_status[portnum];
544
545 /*
546 * The controller won't set the OWNER bit if the port is
547 * enabled, so this loop will sometimes require at least two
548 * iterations: one to disable the port and one to set OWNER.
549 */
550 for (try = 4; try > 0; --try) {
551 spin_lock_irq(&ehci->lock);
552 port_status = ehci_readl(ehci, status_reg);
553 if ((port_status & PORT_OWNER) == new_owner
554 || (port_status & (PORT_OWNER | PORT_CONNECT))
555 == 0)
556 try = 0;
557 else {
558 port_status ^= PORT_OWNER;
559 port_status &= ~(PORT_PE | PORT_RWC_BITS);
560 ehci_writel(ehci, port_status, status_reg);
561 }
562 spin_unlock_irq(&ehci->lock);
563 if (try > 1)
564 msleep(5);
565 }
566}
567
568/*-------------------------------------------------------------------------*/
569
570static int check_reset_complete (
571 struct ehci_hcd *ehci,
572 int index,
573 u32 __iomem *status_reg,
574 int port_status
575) {
576 if (!(port_status & PORT_CONNECT))
577 return port_status;
578
579 /* if reset finished and it's still not enabled -- handoff */
580 if (!(port_status & PORT_PE)) {
581
582 /* with integrated TT, there's nobody to hand it to! */
583 if (ehci_is_TDI(ehci)) {
584 ehci_dbg (ehci,
585 "Failed to enable port %d on root hub TT\n",
586 index+1);
587 return port_status;
588 }
589
590 ehci_dbg (ehci, "port %d full speed --> companion\n",
591 index + 1);
592
593 // what happens if HCS_N_CC(params) == 0 ?
594 port_status |= PORT_OWNER;
595 port_status &= ~PORT_RWC_BITS;
596 ehci_writel(ehci, port_status, status_reg);
597
598 /* ensure 440EPX ohci controller state is operational */
599 if (ehci->has_amcc_usb23)
600 set_ohci_hcfs(ehci, 1);
601 } else {
602 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
603 index + 1);
604 /* ensure 440EPx ohci controller state is suspended */
605 if (ehci->has_amcc_usb23)
606 set_ohci_hcfs(ehci, 0);
607 }
608
609 return port_status;
610}
611
612/*-------------------------------------------------------------------------*/
613
614
615/* build "status change" packet (one or two bytes) from HC registers */
616
617static int
618ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
619{
620 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
621 u32 temp, status;
622 u32 mask;
623 int ports, i, retval = 1;
624 unsigned long flags;
625 u32 ppcd = ~0;
626
627 /* init status to no-changes */
628 buf [0] = 0;
629 ports = HCS_N_PORTS (ehci->hcs_params);
630 if (ports > 7) {
631 buf [1] = 0;
632 retval++;
633 }
634
635 /* Inform the core about resumes-in-progress by returning
636 * a non-zero value even if there are no status changes.
637 */
638 status = ehci->resuming_ports;
639
640 /* Some boards (mostly VIA?) report bogus overcurrent indications,
641 * causing massive log spam unless we completely ignore them. It
642 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
643 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
644 * PORT_POWER; that's surprising, but maybe within-spec.
645 */
646 if (!ignore_oc && !ehci->spurious_oc)
647 mask = PORT_CSC | PORT_PEC | PORT_OCC;
648 else
649 mask = PORT_CSC | PORT_PEC;
650 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
651
652 /* no hub change reports (bit 0) for now (power, ...) */
653
654 /* port N changes (bit N)? */
655 spin_lock_irqsave (&ehci->lock, flags);
656
657 /* get per-port change detect bits */
658 if (ehci->has_ppcd)
659 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
660
661 for (i = 0; i < ports; i++) {
662 /* leverage per-port change bits feature */
663 if (ppcd & (1 << i))
664 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
665 else
666 temp = 0;
667
668 /*
669 * Return status information even for ports with OWNER set.
670 * Otherwise hub_wq wouldn't see the disconnect event when a
671 * high-speed device is switched over to the companion
672 * controller by the user.
673 */
674
675 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
676 || (ehci->reset_done[i] && time_after_eq(
677 jiffies, ehci->reset_done[i]))
678 || ehci_has_ci_pec_bug(ehci, temp)) {
679 if (i < 7)
680 buf [0] |= 1 << (i + 1);
681 else
682 buf [1] |= 1 << (i - 7);
683 status = STS_PCD;
684 }
685 }
686
687 /* If a resume is in progress, make sure it can finish */
688 if (ehci->resuming_ports)
689 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
690
691 spin_unlock_irqrestore (&ehci->lock, flags);
692 return status ? retval : 0;
693}
694
695/*-------------------------------------------------------------------------*/
696
697static void
698ehci_hub_descriptor (
699 struct ehci_hcd *ehci,
700 struct usb_hub_descriptor *desc
701) {
702 int ports = HCS_N_PORTS (ehci->hcs_params);
703 u16 temp;
704
705 desc->bDescriptorType = USB_DT_HUB;
706 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
707 desc->bHubContrCurrent = 0;
708
709 desc->bNbrPorts = ports;
710 temp = 1 + (ports / 8);
711 desc->bDescLength = 7 + 2 * temp;
712
713 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
714 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
715 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
716
717 temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
718 if (HCS_PPC (ehci->hcs_params))
719 temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */
720 else
721 temp |= HUB_CHAR_NO_LPSM; /* no power switching */
722#if 0
723// re-enable when we support USB_PORT_FEAT_INDICATOR below.
724 if (HCS_INDICATOR (ehci->hcs_params))
725 temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */
726#endif
727 desc->wHubCharacteristics = cpu_to_le16(temp);
728}
729
730/*-------------------------------------------------------------------------*/
731
732int ehci_hub_control(
733 struct usb_hcd *hcd,
734 u16 typeReq,
735 u16 wValue,
736 u16 wIndex,
737 char *buf,
738 u16 wLength
739) {
740 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
741 int ports = HCS_N_PORTS (ehci->hcs_params);
742 u32 __iomem *status_reg, *hostpc_reg;
743 u32 temp, temp1, status;
744 unsigned long flags;
745 int retval = 0;
746 unsigned selector;
747
748 /*
749 * Avoid out-of-bounds values while calculating the port index
750 * from wIndex. The compiler doesn't like pointers to invalid
751 * addresses, even if they are never used.
752 */
753 temp = (wIndex - 1) & 0xff;
754 if (temp >= HCS_N_PORTS_MAX)
755 temp = 0;
756 status_reg = &ehci->regs->port_status[temp];
757 hostpc_reg = &ehci->regs->hostpc[temp];
758
759 /*
760 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
761 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
762 * (track current state ourselves) ... blink for diagnostics,
763 * power, "this is the one", etc. EHCI spec supports this.
764 */
765
766 spin_lock_irqsave (&ehci->lock, flags);
767 switch (typeReq) {
768 case ClearHubFeature:
769 switch (wValue) {
770 case C_HUB_LOCAL_POWER:
771 case C_HUB_OVER_CURRENT:
772 /* no hub-wide feature/status flags */
773 break;
774 default:
775 goto error;
776 }
777 break;
778 case ClearPortFeature:
779 if (!wIndex || wIndex > ports)
780 goto error;
781 wIndex--;
782 temp = ehci_readl(ehci, status_reg);
783 temp &= ~PORT_RWC_BITS;
784
785 /*
786 * Even if OWNER is set, so the port is owned by the
787 * companion controller, hub_wq needs to be able to clear
788 * the port-change status bits (especially
789 * USB_PORT_STAT_C_CONNECTION).
790 */
791
792 switch (wValue) {
793 case USB_PORT_FEAT_ENABLE:
794 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
795 break;
796 case USB_PORT_FEAT_C_ENABLE:
797 ehci_writel(ehci, temp | PORT_PEC, status_reg);
798 break;
799 case USB_PORT_FEAT_SUSPEND:
800 if (temp & PORT_RESET)
801 goto error;
802 if (ehci->no_selective_suspend)
803 break;
804#ifdef CONFIG_USB_OTG
805 if ((hcd->self.otg_port == (wIndex + 1))
806 && hcd->self.b_hnp_enable) {
807 otg_start_hnp(hcd->usb_phy->otg);
808 break;
809 }
810#endif
811 if (!(temp & PORT_SUSPEND))
812 break;
813 if ((temp & PORT_PE) == 0)
814 goto error;
815
816 /* clear phy low-power mode before resume */
817 if (ehci->has_tdi_phy_lpm) {
818 temp1 = ehci_readl(ehci, hostpc_reg);
819 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
820 hostpc_reg);
821 spin_unlock_irqrestore(&ehci->lock, flags);
822 msleep(5);/* wait to leave low-power mode */
823 spin_lock_irqsave(&ehci->lock, flags);
824 }
825 /* resume signaling for 20 msec */
826 temp &= ~PORT_WAKE_BITS;
827 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
828 ehci->reset_done[wIndex] = jiffies
829 + msecs_to_jiffies(USB_RESUME_TIMEOUT);
830 set_bit(wIndex, &ehci->resuming_ports);
831 usb_hcd_start_port_resume(&hcd->self, wIndex);
832 break;
833 case USB_PORT_FEAT_C_SUSPEND:
834 clear_bit(wIndex, &ehci->port_c_suspend);
835 break;
836 case USB_PORT_FEAT_POWER:
837 if (HCS_PPC(ehci->hcs_params)) {
838 spin_unlock_irqrestore(&ehci->lock, flags);
839 ehci_port_power(ehci, wIndex, false);
840 spin_lock_irqsave(&ehci->lock, flags);
841 }
842 break;
843 case USB_PORT_FEAT_C_CONNECTION:
844 ehci_writel(ehci, temp | PORT_CSC, status_reg);
845 break;
846 case USB_PORT_FEAT_C_OVER_CURRENT:
847 ehci_writel(ehci, temp | PORT_OCC, status_reg);
848 break;
849 case USB_PORT_FEAT_C_RESET:
850 /* GetPortStatus clears reset */
851 break;
852 default:
853 goto error;
854 }
855 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
856 break;
857 case GetHubDescriptor:
858 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
859 buf);
860 break;
861 case GetHubStatus:
862 /* no hub-wide feature/status flags */
863 memset (buf, 0, 4);
864 //cpu_to_le32s ((u32 *) buf);
865 break;
866 case GetPortStatus:
867 if (!wIndex || wIndex > ports)
868 goto error;
869 wIndex--;
870 status = 0;
871 temp = ehci_readl(ehci, status_reg);
872
873 // wPortChange bits
874 if (temp & PORT_CSC)
875 status |= USB_PORT_STAT_C_CONNECTION << 16;
876 if (temp & PORT_PEC)
877 status |= USB_PORT_STAT_C_ENABLE << 16;
878
879 if (ehci_has_ci_pec_bug(ehci, temp)) {
880 status |= USB_PORT_STAT_C_ENABLE << 16;
881 ehci_info(ehci,
882 "PE is cleared by HW port:%d PORTSC:%08x\n",
883 wIndex + 1, temp);
884 }
885
886 if ((temp & PORT_OCC) && (!ignore_oc && !ehci->spurious_oc)){
887 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
888
889 /*
890 * Hubs should disable port power on over-current.
891 * However, not all EHCI implementations do this
892 * automatically, even if they _do_ support per-port
893 * power switching; they're allowed to just limit the
894 * current. hub_wq will turn the power back on.
895 */
896 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
897 && HCS_PPC(ehci->hcs_params)) {
898 spin_unlock_irqrestore(&ehci->lock, flags);
899 ehci_port_power(ehci, wIndex, false);
900 spin_lock_irqsave(&ehci->lock, flags);
901 temp = ehci_readl(ehci, status_reg);
902 }
903 }
904
905 /* no reset or resume pending */
906 if (!ehci->reset_done[wIndex]) {
907
908 /* Remote Wakeup received? */
909 if (temp & PORT_RESUME) {
910 /* resume signaling for 20 msec */
911 ehci->reset_done[wIndex] = jiffies
912 + msecs_to_jiffies(20);
913 usb_hcd_start_port_resume(&hcd->self, wIndex);
914 set_bit(wIndex, &ehci->resuming_ports);
915 /* check the port again */
916 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
917 ehci->reset_done[wIndex]);
918 }
919
920 /* reset or resume not yet complete */
921 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
922 ; /* wait until it is complete */
923
924 /* resume completed */
925 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
926 clear_bit(wIndex, &ehci->suspended_ports);
927 set_bit(wIndex, &ehci->port_c_suspend);
928 ehci->reset_done[wIndex] = 0;
929 usb_hcd_end_port_resume(&hcd->self, wIndex);
930
931 /* stop resume signaling */
932 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
933 ehci_writel(ehci, temp, status_reg);
934 clear_bit(wIndex, &ehci->resuming_ports);
935 retval = ehci_handshake(ehci, status_reg,
936 PORT_RESUME, 0, 2000 /* 2msec */);
937 if (retval != 0) {
938 ehci_err(ehci, "port %d resume error %d\n",
939 wIndex + 1, retval);
940 goto error;
941 }
942 temp = ehci_readl(ehci, status_reg);
943
944 /* whoever resets must GetPortStatus to complete it!! */
945 } else {
946 status |= USB_PORT_STAT_C_RESET << 16;
947 ehci->reset_done [wIndex] = 0;
948
949 /* force reset to complete */
950 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
951 status_reg);
952 /* REVISIT: some hardware needs 550+ usec to clear
953 * this bit; seems too long to spin routinely...
954 */
955 retval = ehci_handshake(ehci, status_reg,
956 PORT_RESET, 0, 1000);
957 if (retval != 0) {
958 ehci_err (ehci, "port %d reset error %d\n",
959 wIndex + 1, retval);
960 goto error;
961 }
962
963 /* see what we found out */
964 temp = check_reset_complete (ehci, wIndex, status_reg,
965 ehci_readl(ehci, status_reg));
966 }
967
968 /* transfer dedicated ports to the companion hc */
969 if ((temp & PORT_CONNECT) &&
970 test_bit(wIndex, &ehci->companion_ports)) {
971 temp &= ~PORT_RWC_BITS;
972 temp |= PORT_OWNER;
973 ehci_writel(ehci, temp, status_reg);
974 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
975 temp = ehci_readl(ehci, status_reg);
976 }
977
978 /*
979 * Even if OWNER is set, there's no harm letting hub_wq
980 * see the wPortStatus values (they should all be 0 except
981 * for PORT_POWER anyway).
982 */
983
984 if (temp & PORT_CONNECT) {
985 status |= USB_PORT_STAT_CONNECTION;
986 // status may be from integrated TT
987 if (ehci->has_hostpc) {
988 temp1 = ehci_readl(ehci, hostpc_reg);
989 status |= ehci_port_speed(ehci, temp1);
990 } else
991 status |= ehci_port_speed(ehci, temp);
992 }
993 if (temp & PORT_PE)
994 status |= USB_PORT_STAT_ENABLE;
995
996 /* maybe the port was unsuspended without our knowledge */
997 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
998 status |= USB_PORT_STAT_SUSPEND;
999 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1000 clear_bit(wIndex, &ehci->suspended_ports);
1001 clear_bit(wIndex, &ehci->resuming_ports);
1002 ehci->reset_done[wIndex] = 0;
1003 if (temp & PORT_PE)
1004 set_bit(wIndex, &ehci->port_c_suspend);
1005 usb_hcd_end_port_resume(&hcd->self, wIndex);
1006 }
1007
1008 if (temp & PORT_OC)
1009 status |= USB_PORT_STAT_OVERCURRENT;
1010 if (temp & PORT_RESET)
1011 status |= USB_PORT_STAT_RESET;
1012 if (temp & PORT_POWER)
1013 status |= USB_PORT_STAT_POWER;
1014 if (test_bit(wIndex, &ehci->port_c_suspend))
1015 status |= USB_PORT_STAT_C_SUSPEND << 16;
1016
1017 if (status & ~0xffff) /* only if wPortChange is interesting */
1018 dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1019 put_unaligned_le32(status, buf);
1020 break;
1021 case SetHubFeature:
1022 switch (wValue) {
1023 case C_HUB_LOCAL_POWER:
1024 case C_HUB_OVER_CURRENT:
1025 /* no hub-wide feature/status flags */
1026 break;
1027 default:
1028 goto error;
1029 }
1030 break;
1031 case SetPortFeature:
1032 selector = wIndex >> 8;
1033 wIndex &= 0xff;
1034 if (unlikely(ehci->debug)) {
1035 /* If the debug port is active any port
1036 * feature requests should get denied */
1037 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1038 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1039 retval = -ENODEV;
1040 goto error_exit;
1041 }
1042 }
1043 if (!wIndex || wIndex > ports)
1044 goto error;
1045 wIndex--;
1046 temp = ehci_readl(ehci, status_reg);
1047 if (temp & PORT_OWNER)
1048 break;
1049
1050 temp &= ~PORT_RWC_BITS;
1051 switch (wValue) {
1052 case USB_PORT_FEAT_SUSPEND:
1053 if (ehci->no_selective_suspend)
1054 break;
1055 if ((temp & PORT_PE) == 0
1056 || (temp & PORT_RESET) != 0)
1057 goto error;
1058
1059 /* After above check the port must be connected.
1060 * Set appropriate bit thus could put phy into low power
1061 * mode if we have tdi_phy_lpm feature
1062 */
1063 temp &= ~PORT_WKCONN_E;
1064 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1065 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1066 if (ehci->has_tdi_phy_lpm) {
1067 spin_unlock_irqrestore(&ehci->lock, flags);
1068 msleep(5);/* 5ms for HCD enter low pwr mode */
1069 spin_lock_irqsave(&ehci->lock, flags);
1070 temp1 = ehci_readl(ehci, hostpc_reg);
1071 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1072 hostpc_reg);
1073 temp1 = ehci_readl(ehci, hostpc_reg);
1074 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1075 wIndex, (temp1 & HOSTPC_PHCD) ?
1076 "succeeded" : "failed");
1077 }
1078 if (ehci_has_fsl_susp_errata(ehci)) {
1079 /* 10ms for HCD enter suspend */
1080 spin_unlock_irqrestore(&ehci->lock, flags);
1081 usleep_range(10000, 20000);
1082 spin_lock_irqsave(&ehci->lock, flags);
1083 }
1084 set_bit(wIndex, &ehci->suspended_ports);
1085 break;
1086 case USB_PORT_FEAT_POWER:
1087 if (HCS_PPC(ehci->hcs_params)) {
1088 spin_unlock_irqrestore(&ehci->lock, flags);
1089 ehci_port_power(ehci, wIndex, true);
1090 spin_lock_irqsave(&ehci->lock, flags);
1091 }
1092 break;
1093 case USB_PORT_FEAT_RESET:
1094 if (temp & (PORT_SUSPEND|PORT_RESUME))
1095 goto error;
1096 /* line status bits may report this as low speed,
1097 * which can be fine if this root hub has a
1098 * transaction translator built in.
1099 */
1100 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1101 && !ehci_is_TDI(ehci)
1102 && PORT_USB11 (temp)) {
1103 ehci_dbg (ehci,
1104 "port %d low speed --> companion\n",
1105 wIndex + 1);
1106 temp |= PORT_OWNER;
1107 } else {
1108 temp |= PORT_RESET;
1109 temp &= ~PORT_PE;
1110
1111 /*
1112 * caller must wait, then call GetPortStatus
1113 * usb 2.0 spec says 50 ms resets on root
1114 */
1115 ehci->reset_done [wIndex] = jiffies
1116 + msecs_to_jiffies (50);
1117
1118 /*
1119 * Force full-speed connect for FSL high-speed
1120 * erratum; disable HS Chirp by setting PFSC bit
1121 */
1122 if (ehci_has_fsl_hs_errata(ehci))
1123 temp |= (1 << PORTSC_FSL_PFSC);
1124 }
1125 ehci_writel(ehci, temp, status_reg);
1126 break;
1127
1128 /* For downstream facing ports (these): one hub port is put
1129 * into test mode according to USB2 11.24.2.13, then the hub
1130 * must be reset (which for root hub now means rmmod+modprobe,
1131 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1132 * about the EHCI-specific stuff.
1133 */
1134 case USB_PORT_FEAT_TEST:
1135#ifdef CONFIG_USB_HCD_TEST_MODE
1136 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1137 spin_unlock_irqrestore(&ehci->lock, flags);
1138 retval = ehset_single_step_set_feature(hcd,
1139 wIndex + 1);
1140 spin_lock_irqsave(&ehci->lock, flags);
1141 break;
1142 }
1143#endif
1144 if (!selector || selector > 5)
1145 goto error;
1146 spin_unlock_irqrestore(&ehci->lock, flags);
1147 ehci_quiesce(ehci);
1148 spin_lock_irqsave(&ehci->lock, flags);
1149
1150 /* Put all enabled ports into suspend */
1151 while (ports--) {
1152 u32 __iomem *sreg =
1153 &ehci->regs->port_status[ports];
1154
1155 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1156 if (temp & PORT_PE)
1157 ehci_writel(ehci, temp | PORT_SUSPEND,
1158 sreg);
1159 }
1160
1161 spin_unlock_irqrestore(&ehci->lock, flags);
1162 ehci_halt(ehci);
1163 spin_lock_irqsave(&ehci->lock, flags);
1164
1165 temp = ehci_readl(ehci, status_reg);
1166 temp |= selector << 16;
1167 ehci_writel(ehci, temp, status_reg);
1168 break;
1169
1170 default:
1171 goto error;
1172 }
1173 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1174 break;
1175
1176 default:
1177error:
1178 /* "stall" on error */
1179 retval = -EPIPE;
1180 }
1181error_exit:
1182 spin_unlock_irqrestore (&ehci->lock, flags);
1183 return retval;
1184}
1185EXPORT_SYMBOL_GPL(ehci_hub_control);
1186
1187static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1188{
1189 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1190
1191 if (ehci_is_TDI(ehci))
1192 return;
1193 set_owner(ehci, --portnum, PORT_OWNER);
1194}
1195
1196static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1197{
1198 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1199 u32 __iomem *reg;
1200
1201 if (ehci_is_TDI(ehci))
1202 return 0;
1203 reg = &ehci->regs->port_status[portnum - 1];
1204 return ehci_readl(ehci, reg) & PORT_OWNER;
1205}
1206
1207static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable)
1208{
1209 struct usb_hcd *hcd = ehci_to_hcd(ehci);
1210 u32 __iomem *status_reg = &ehci->regs->port_status[portnum];
1211 u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
1212
1213 if (enable)
1214 ehci_writel(ehci, temp | PORT_POWER, status_reg);
1215 else
1216 ehci_writel(ehci, temp & ~PORT_POWER, status_reg);
1217
1218 if (hcd->driver->port_power)
1219 hcd->driver->port_power(hcd, portnum, enable);
1220
1221 return 0;
1222}
1/*
2 * Copyright (C) 2001-2004 by David Brownell
3 *
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.
8 *
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
12 * for more details.
13 *
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.
17 */
18
19/* this file is part of ehci-hcd.c */
20
21/*-------------------------------------------------------------------------*/
22
23/*
24 * EHCI Root Hub ... the nonsharable stuff
25 *
26 * Registers don't need cpu_to_le32, that happens transparently
27 */
28
29/*-------------------------------------------------------------------------*/
30#include <linux/usb/otg.h>
31
32#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
33
34#ifdef CONFIG_PM
35
36static int ehci_hub_control(
37 struct usb_hcd *hcd,
38 u16 typeReq,
39 u16 wValue,
40 u16 wIndex,
41 char *buf,
42 u16 wLength
43);
44
45static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
46{
47 return !udev->maxchild && udev->persist_enabled &&
48 udev->bus->root_hub->speed < USB_SPEED_HIGH;
49}
50
51/* After a power loss, ports that were owned by the companion must be
52 * reset so that the companion can still own them.
53 */
54static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
55{
56 u32 __iomem *reg;
57 u32 status;
58 int port;
59 __le32 buf;
60 struct usb_hcd *hcd = ehci_to_hcd(ehci);
61
62 if (!ehci->owned_ports)
63 return;
64
65 /*
66 * USB 1.1 devices are mostly HIDs, which don't need to persist across
67 * suspends. If we ensure that none of our companion's devices have
68 * persist_enabled (by looking through all USB 1.1 buses in the system),
69 * we can skip this and avoid slowing resume down. Devices without
70 * persist will just get reenumerated shortly after resume anyway.
71 */
72 if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
73 return;
74
75 /* Make sure the ports are powered */
76 port = HCS_N_PORTS(ehci->hcs_params);
77 while (port--) {
78 if (test_bit(port, &ehci->owned_ports)) {
79 reg = &ehci->regs->port_status[port];
80 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
81 if (!(status & PORT_POWER)) {
82 status |= PORT_POWER;
83 ehci_writel(ehci, status, reg);
84 }
85 }
86 }
87
88 /* Give the connections some time to appear */
89 msleep(20);
90
91 spin_lock_irq(&ehci->lock);
92 port = HCS_N_PORTS(ehci->hcs_params);
93 while (port--) {
94 if (test_bit(port, &ehci->owned_ports)) {
95 reg = &ehci->regs->port_status[port];
96 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
97
98 /* Port already owned by companion? */
99 if (status & PORT_OWNER)
100 clear_bit(port, &ehci->owned_ports);
101 else if (test_bit(port, &ehci->companion_ports))
102 ehci_writel(ehci, status & ~PORT_PE, reg);
103 else {
104 spin_unlock_irq(&ehci->lock);
105 ehci_hub_control(hcd, SetPortFeature,
106 USB_PORT_FEAT_RESET, port + 1,
107 NULL, 0);
108 spin_lock_irq(&ehci->lock);
109 }
110 }
111 }
112 spin_unlock_irq(&ehci->lock);
113
114 if (!ehci->owned_ports)
115 return;
116 msleep(90); /* Wait for resets to complete */
117
118 spin_lock_irq(&ehci->lock);
119 port = HCS_N_PORTS(ehci->hcs_params);
120 while (port--) {
121 if (test_bit(port, &ehci->owned_ports)) {
122 spin_unlock_irq(&ehci->lock);
123 ehci_hub_control(hcd, GetPortStatus,
124 0, port + 1,
125 (char *) &buf, sizeof(buf));
126 spin_lock_irq(&ehci->lock);
127
128 /* The companion should now own the port,
129 * but if something went wrong the port must not
130 * remain enabled.
131 */
132 reg = &ehci->regs->port_status[port];
133 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
134 if (status & PORT_OWNER)
135 ehci_writel(ehci, status | PORT_CSC, reg);
136 else {
137 ehci_dbg(ehci, "failed handover port %d: %x\n",
138 port + 1, status);
139 ehci_writel(ehci, status & ~PORT_PE, reg);
140 }
141 }
142 }
143
144 ehci->owned_ports = 0;
145 spin_unlock_irq(&ehci->lock);
146}
147
148static int ehci_port_change(struct ehci_hcd *ehci)
149{
150 int i = HCS_N_PORTS(ehci->hcs_params);
151
152 /* First check if the controller indicates a change event */
153
154 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
155 return 1;
156
157 /*
158 * Not all controllers appear to update this while going from D3 to D0,
159 * so check the individual port status registers as well
160 */
161
162 while (i--)
163 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
164 return 1;
165
166 return 0;
167}
168
169static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
170 bool suspending, bool do_wakeup)
171{
172 int port;
173 u32 temp;
174
175 /* If remote wakeup is enabled for the root hub but disabled
176 * for the controller, we must adjust all the port wakeup flags
177 * when the controller is suspended or resumed. In all other
178 * cases they don't need to be changed.
179 */
180 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
181 return;
182
183 spin_lock_irq(&ehci->lock);
184
185 /* clear phy low-power mode before changing wakeup flags */
186 if (ehci->has_tdi_phy_lpm) {
187 port = HCS_N_PORTS(ehci->hcs_params);
188 while (port--) {
189 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
190
191 temp = ehci_readl(ehci, hostpc_reg);
192 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
193 }
194 spin_unlock_irq(&ehci->lock);
195 msleep(5);
196 spin_lock_irq(&ehci->lock);
197 }
198
199 port = HCS_N_PORTS(ehci->hcs_params);
200 while (port--) {
201 u32 __iomem *reg = &ehci->regs->port_status[port];
202 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
203 u32 t2 = t1 & ~PORT_WAKE_BITS;
204
205 /* If we are suspending the controller, clear the flags.
206 * If we are resuming the controller, set the wakeup flags.
207 */
208 if (!suspending) {
209 if (t1 & PORT_CONNECT)
210 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
211 else
212 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
213 }
214 ehci_writel(ehci, t2, reg);
215 }
216
217 /* enter phy low-power mode again */
218 if (ehci->has_tdi_phy_lpm) {
219 port = HCS_N_PORTS(ehci->hcs_params);
220 while (port--) {
221 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
222
223 temp = ehci_readl(ehci, hostpc_reg);
224 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
225 }
226 }
227
228 /* Does the root hub have a port wakeup pending? */
229 if (!suspending && ehci_port_change(ehci))
230 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
231
232 spin_unlock_irq(&ehci->lock);
233}
234
235static int ehci_bus_suspend (struct usb_hcd *hcd)
236{
237 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
238 int port;
239 int mask;
240 int changed;
241 bool fs_idle_delay;
242
243 ehci_dbg(ehci, "suspend root hub\n");
244
245 if (time_before (jiffies, ehci->next_statechange))
246 msleep(5);
247
248 /* stop the schedules */
249 ehci_quiesce(ehci);
250
251 spin_lock_irq (&ehci->lock);
252 if (ehci->rh_state < EHCI_RH_RUNNING)
253 goto done;
254
255 /* Once the controller is stopped, port resumes that are already
256 * in progress won't complete. Hence if remote wakeup is enabled
257 * for the root hub and any ports are in the middle of a resume or
258 * remote wakeup, we must fail the suspend.
259 */
260 if (hcd->self.root_hub->do_remote_wakeup) {
261 if (ehci->resuming_ports) {
262 spin_unlock_irq(&ehci->lock);
263 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
264 return -EBUSY;
265 }
266 }
267
268 /* Unlike other USB host controller types, EHCI doesn't have
269 * any notion of "global" or bus-wide suspend. The driver has
270 * to manually suspend all the active unsuspended ports, and
271 * then manually resume them in the bus_resume() routine.
272 */
273 ehci->bus_suspended = 0;
274 ehci->owned_ports = 0;
275 changed = 0;
276 fs_idle_delay = false;
277 port = HCS_N_PORTS(ehci->hcs_params);
278 while (port--) {
279 u32 __iomem *reg = &ehci->regs->port_status [port];
280 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
281 u32 t2 = t1 & ~PORT_WAKE_BITS;
282
283 /* keep track of which ports we suspend */
284 if (t1 & PORT_OWNER)
285 set_bit(port, &ehci->owned_ports);
286 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
287 t2 |= PORT_SUSPEND;
288 set_bit(port, &ehci->bus_suspended);
289 }
290
291 /* enable remote wakeup on all ports, if told to do so */
292 if (hcd->self.root_hub->do_remote_wakeup) {
293 /* only enable appropriate wake bits, otherwise the
294 * hardware can not go phy low power mode. If a race
295 * condition happens here(connection change during bits
296 * set), the port change detection will finally fix it.
297 */
298 if (t1 & PORT_CONNECT)
299 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
300 else
301 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
302 }
303
304 if (t1 != t2) {
305 /*
306 * On some controllers, Wake-On-Disconnect will
307 * generate false wakeup signals until the bus
308 * switches over to full-speed idle. For their
309 * sake, add a delay if we need one.
310 */
311 if ((t2 & PORT_WKDISC_E) &&
312 ehci_port_speed(ehci, t2) ==
313 USB_PORT_STAT_HIGH_SPEED)
314 fs_idle_delay = true;
315 ehci_writel(ehci, t2, reg);
316 changed = 1;
317 }
318 }
319 spin_unlock_irq(&ehci->lock);
320
321 if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
322 /*
323 * Wait for HCD to enter low-power mode or for the bus
324 * to switch to full-speed idle.
325 */
326 usleep_range(5000, 5500);
327 }
328
329 if (changed && ehci->has_tdi_phy_lpm) {
330 spin_lock_irq(&ehci->lock);
331 port = HCS_N_PORTS(ehci->hcs_params);
332 while (port--) {
333 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
334 u32 t3;
335
336 t3 = ehci_readl(ehci, hostpc_reg);
337 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
338 t3 = ehci_readl(ehci, hostpc_reg);
339 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
340 port, (t3 & HOSTPC_PHCD) ?
341 "succeeded" : "failed");
342 }
343 spin_unlock_irq(&ehci->lock);
344 }
345
346 /* Apparently some devices need a >= 1-uframe delay here */
347 if (ehci->bus_suspended)
348 udelay(150);
349
350 /* turn off now-idle HC */
351 ehci_halt (ehci);
352
353 spin_lock_irq(&ehci->lock);
354 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
355 ehci_handle_controller_death(ehci);
356 if (ehci->rh_state != EHCI_RH_RUNNING)
357 goto done;
358 ehci->rh_state = EHCI_RH_SUSPENDED;
359
360 end_unlink_async(ehci);
361 unlink_empty_async_suspended(ehci);
362 ehci_handle_start_intr_unlinks(ehci);
363 ehci_handle_intr_unlinks(ehci);
364 end_free_itds(ehci);
365
366 /* allow remote wakeup */
367 mask = INTR_MASK;
368 if (!hcd->self.root_hub->do_remote_wakeup)
369 mask &= ~STS_PCD;
370 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
371 ehci_readl(ehci, &ehci->regs->intr_enable);
372
373 done:
374 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
375 ehci->enabled_hrtimer_events = 0;
376 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
377 spin_unlock_irq (&ehci->lock);
378
379 hrtimer_cancel(&ehci->hrtimer);
380 return 0;
381}
382
383
384/* caller has locked the root hub, and should reset/reinit on error */
385static int ehci_bus_resume (struct usb_hcd *hcd)
386{
387 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
388 u32 temp;
389 u32 power_okay;
390 int i;
391 unsigned long resume_needed = 0;
392
393 if (time_before (jiffies, ehci->next_statechange))
394 msleep(5);
395 spin_lock_irq (&ehci->lock);
396 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
397 goto shutdown;
398
399 if (unlikely(ehci->debug)) {
400 if (!dbgp_reset_prep(hcd))
401 ehci->debug = NULL;
402 else
403 dbgp_external_startup(hcd);
404 }
405
406 /* Ideally and we've got a real resume here, and no port's power
407 * was lost. (For PCI, that means Vaux was maintained.) But we
408 * could instead be restoring a swsusp snapshot -- so that BIOS was
409 * the last user of the controller, not reset/pm hardware keeping
410 * state we gave to it.
411 */
412 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
413 ehci_dbg(ehci, "resume root hub%s\n",
414 power_okay ? "" : " after power loss");
415
416 /* at least some APM implementations will try to deliver
417 * IRQs right away, so delay them until we're ready.
418 */
419 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
420
421 /* re-init operational registers */
422 ehci_writel(ehci, 0, &ehci->regs->segment);
423 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
424 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
425
426 /* restore CMD_RUN, framelist size, and irq threshold */
427 ehci->command |= CMD_RUN;
428 ehci_writel(ehci, ehci->command, &ehci->regs->command);
429 ehci->rh_state = EHCI_RH_RUNNING;
430
431 /*
432 * According to Bugzilla #8190, the port status for some controllers
433 * will be wrong without a delay. At their wrong status, the port
434 * is enabled, but not suspended neither resumed.
435 */
436 i = HCS_N_PORTS(ehci->hcs_params);
437 while (i--) {
438 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
439 if ((temp & PORT_PE) &&
440 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
441 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
442 spin_unlock_irq(&ehci->lock);
443 msleep(8);
444 spin_lock_irq(&ehci->lock);
445 break;
446 }
447 }
448
449 if (ehci->shutdown)
450 goto shutdown;
451
452 /* clear phy low-power mode before resume */
453 if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
454 i = HCS_N_PORTS(ehci->hcs_params);
455 while (i--) {
456 if (test_bit(i, &ehci->bus_suspended)) {
457 u32 __iomem *hostpc_reg =
458 &ehci->regs->hostpc[i];
459
460 temp = ehci_readl(ehci, hostpc_reg);
461 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
462 hostpc_reg);
463 }
464 }
465 spin_unlock_irq(&ehci->lock);
466 msleep(5);
467 spin_lock_irq(&ehci->lock);
468 if (ehci->shutdown)
469 goto shutdown;
470 }
471
472 /* manually resume the ports we suspended during bus_suspend() */
473 i = HCS_N_PORTS (ehci->hcs_params);
474 while (i--) {
475 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
476 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
477 if (test_bit(i, &ehci->bus_suspended) &&
478 (temp & PORT_SUSPEND)) {
479 temp |= PORT_RESUME;
480 set_bit(i, &resume_needed);
481 }
482 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
483 }
484
485 /* msleep for 20ms only if code is trying to resume port */
486 if (resume_needed) {
487 spin_unlock_irq(&ehci->lock);
488 msleep(20);
489 spin_lock_irq(&ehci->lock);
490 if (ehci->shutdown)
491 goto shutdown;
492 }
493
494 i = HCS_N_PORTS (ehci->hcs_params);
495 while (i--) {
496 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
497 if (test_bit(i, &resume_needed)) {
498 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
499 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
500 }
501 }
502
503 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
504 spin_unlock_irq(&ehci->lock);
505
506 ehci_handover_companion_ports(ehci);
507
508 /* Now we can safely re-enable irqs */
509 spin_lock_irq(&ehci->lock);
510 if (ehci->shutdown)
511 goto shutdown;
512 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
513 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
514 spin_unlock_irq(&ehci->lock);
515
516 return 0;
517
518 shutdown:
519 spin_unlock_irq(&ehci->lock);
520 return -ESHUTDOWN;
521}
522
523#else
524
525#define ehci_bus_suspend NULL
526#define ehci_bus_resume NULL
527
528#endif /* CONFIG_PM */
529
530/*-------------------------------------------------------------------------*/
531
532/*
533 * Sets the owner of a port
534 */
535static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
536{
537 u32 __iomem *status_reg;
538 u32 port_status;
539 int try;
540
541 status_reg = &ehci->regs->port_status[portnum];
542
543 /*
544 * The controller won't set the OWNER bit if the port is
545 * enabled, so this loop will sometimes require at least two
546 * iterations: one to disable the port and one to set OWNER.
547 */
548 for (try = 4; try > 0; --try) {
549 spin_lock_irq(&ehci->lock);
550 port_status = ehci_readl(ehci, status_reg);
551 if ((port_status & PORT_OWNER) == new_owner
552 || (port_status & (PORT_OWNER | PORT_CONNECT))
553 == 0)
554 try = 0;
555 else {
556 port_status ^= PORT_OWNER;
557 port_status &= ~(PORT_PE | PORT_RWC_BITS);
558 ehci_writel(ehci, port_status, status_reg);
559 }
560 spin_unlock_irq(&ehci->lock);
561 if (try > 1)
562 msleep(5);
563 }
564}
565
566/*-------------------------------------------------------------------------*/
567
568static int check_reset_complete (
569 struct ehci_hcd *ehci,
570 int index,
571 u32 __iomem *status_reg,
572 int port_status
573) {
574 if (!(port_status & PORT_CONNECT))
575 return port_status;
576
577 /* if reset finished and it's still not enabled -- handoff */
578 if (!(port_status & PORT_PE)) {
579
580 /* with integrated TT, there's nobody to hand it to! */
581 if (ehci_is_TDI(ehci)) {
582 ehci_dbg (ehci,
583 "Failed to enable port %d on root hub TT\n",
584 index+1);
585 return port_status;
586 }
587
588 ehci_dbg (ehci, "port %d full speed --> companion\n",
589 index + 1);
590
591 // what happens if HCS_N_CC(params) == 0 ?
592 port_status |= PORT_OWNER;
593 port_status &= ~PORT_RWC_BITS;
594 ehci_writel(ehci, port_status, status_reg);
595
596 /* ensure 440EPX ohci controller state is operational */
597 if (ehci->has_amcc_usb23)
598 set_ohci_hcfs(ehci, 1);
599 } else {
600 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
601 index + 1);
602 /* ensure 440EPx ohci controller state is suspended */
603 if (ehci->has_amcc_usb23)
604 set_ohci_hcfs(ehci, 0);
605 }
606
607 return port_status;
608}
609
610/*-------------------------------------------------------------------------*/
611
612
613/* build "status change" packet (one or two bytes) from HC registers */
614
615static int
616ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
617{
618 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
619 u32 temp, status;
620 u32 mask;
621 int ports, i, retval = 1;
622 unsigned long flags;
623 u32 ppcd = ~0;
624
625 /* init status to no-changes */
626 buf [0] = 0;
627 ports = HCS_N_PORTS (ehci->hcs_params);
628 if (ports > 7) {
629 buf [1] = 0;
630 retval++;
631 }
632
633 /* Inform the core about resumes-in-progress by returning
634 * a non-zero value even if there are no status changes.
635 */
636 status = ehci->resuming_ports;
637
638 /* Some boards (mostly VIA?) report bogus overcurrent indications,
639 * causing massive log spam unless we completely ignore them. It
640 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
641 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
642 * PORT_POWER; that's surprising, but maybe within-spec.
643 */
644 if (!ignore_oc)
645 mask = PORT_CSC | PORT_PEC | PORT_OCC;
646 else
647 mask = PORT_CSC | PORT_PEC;
648 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
649
650 /* no hub change reports (bit 0) for now (power, ...) */
651
652 /* port N changes (bit N)? */
653 spin_lock_irqsave (&ehci->lock, flags);
654
655 /* get per-port change detect bits */
656 if (ehci->has_ppcd)
657 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
658
659 for (i = 0; i < ports; i++) {
660 /* leverage per-port change bits feature */
661 if (ppcd & (1 << i))
662 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
663 else
664 temp = 0;
665
666 /*
667 * Return status information even for ports with OWNER set.
668 * Otherwise khubd wouldn't see the disconnect event when a
669 * high-speed device is switched over to the companion
670 * controller by the user.
671 */
672
673 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
674 || (ehci->reset_done[i] && time_after_eq(
675 jiffies, ehci->reset_done[i]))) {
676 if (i < 7)
677 buf [0] |= 1 << (i + 1);
678 else
679 buf [1] |= 1 << (i - 7);
680 status = STS_PCD;
681 }
682 }
683
684 /* If a resume is in progress, make sure it can finish */
685 if (ehci->resuming_ports)
686 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
687
688 spin_unlock_irqrestore (&ehci->lock, flags);
689 return status ? retval : 0;
690}
691
692/*-------------------------------------------------------------------------*/
693
694static void
695ehci_hub_descriptor (
696 struct ehci_hcd *ehci,
697 struct usb_hub_descriptor *desc
698) {
699 int ports = HCS_N_PORTS (ehci->hcs_params);
700 u16 temp;
701
702 desc->bDescriptorType = 0x29;
703 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
704 desc->bHubContrCurrent = 0;
705
706 desc->bNbrPorts = ports;
707 temp = 1 + (ports / 8);
708 desc->bDescLength = 7 + 2 * temp;
709
710 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
711 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
712 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
713
714 temp = 0x0008; /* per-port overcurrent reporting */
715 if (HCS_PPC (ehci->hcs_params))
716 temp |= 0x0001; /* per-port power control */
717 else
718 temp |= 0x0002; /* no power switching */
719#if 0
720// re-enable when we support USB_PORT_FEAT_INDICATOR below.
721 if (HCS_INDICATOR (ehci->hcs_params))
722 temp |= 0x0080; /* per-port indicators (LEDs) */
723#endif
724 desc->wHubCharacteristics = cpu_to_le16(temp);
725}
726
727/*-------------------------------------------------------------------------*/
728#ifdef CONFIG_USB_HCD_TEST_MODE
729
730#define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
731
732static void usb_ehset_completion(struct urb *urb)
733{
734 struct completion *done = urb->context;
735
736 complete(done);
737}
738static int submit_single_step_set_feature(
739 struct usb_hcd *hcd,
740 struct urb *urb,
741 int is_setup
742);
743
744/*
745 * Allocate and initialize a control URB. This request will be used by the
746 * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
747 * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
748 * Return NULL if failed.
749 */
750static struct urb *request_single_step_set_feature_urb(
751 struct usb_device *udev,
752 void *dr,
753 void *buf,
754 struct completion *done
755) {
756 struct urb *urb;
757 struct usb_hcd *hcd = bus_to_hcd(udev->bus);
758 struct usb_host_endpoint *ep;
759
760 urb = usb_alloc_urb(0, GFP_KERNEL);
761 if (!urb)
762 return NULL;
763
764 urb->pipe = usb_rcvctrlpipe(udev, 0);
765 ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
766 [usb_pipeendpoint(urb->pipe)];
767 if (!ep) {
768 usb_free_urb(urb);
769 return NULL;
770 }
771
772 urb->ep = ep;
773 urb->dev = udev;
774 urb->setup_packet = (void *)dr;
775 urb->transfer_buffer = buf;
776 urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
777 urb->complete = usb_ehset_completion;
778 urb->status = -EINPROGRESS;
779 urb->actual_length = 0;
780 urb->transfer_flags = URB_DIR_IN;
781 usb_get_urb(urb);
782 atomic_inc(&urb->use_count);
783 atomic_inc(&urb->dev->urbnum);
784 urb->setup_dma = dma_map_single(
785 hcd->self.controller,
786 urb->setup_packet,
787 sizeof(struct usb_ctrlrequest),
788 DMA_TO_DEVICE);
789 urb->transfer_dma = dma_map_single(
790 hcd->self.controller,
791 urb->transfer_buffer,
792 urb->transfer_buffer_length,
793 DMA_FROM_DEVICE);
794 urb->context = done;
795 return urb;
796}
797
798static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
799{
800 int retval = -ENOMEM;
801 struct usb_ctrlrequest *dr;
802 struct urb *urb;
803 struct usb_device *udev;
804 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
805 struct usb_device_descriptor *buf;
806 DECLARE_COMPLETION_ONSTACK(done);
807
808 /* Obtain udev of the rhub's child port */
809 udev = usb_hub_find_child(hcd->self.root_hub, port);
810 if (!udev) {
811 ehci_err(ehci, "No device attached to the RootHub\n");
812 return -ENODEV;
813 }
814 buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
815 if (!buf)
816 return -ENOMEM;
817
818 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
819 if (!dr) {
820 kfree(buf);
821 return -ENOMEM;
822 }
823
824 /* Fill Setup packet for GetDescriptor */
825 dr->bRequestType = USB_DIR_IN;
826 dr->bRequest = USB_REQ_GET_DESCRIPTOR;
827 dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
828 dr->wIndex = 0;
829 dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
830 urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
831 if (!urb)
832 goto cleanup;
833
834 /* Submit just the SETUP stage */
835 retval = submit_single_step_set_feature(hcd, urb, 1);
836 if (retval)
837 goto out1;
838 if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
839 usb_kill_urb(urb);
840 retval = -ETIMEDOUT;
841 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
842 goto out1;
843 }
844 msleep(15 * 1000);
845
846 /* Complete remaining DATA and STATUS stages using the same URB */
847 urb->status = -EINPROGRESS;
848 usb_get_urb(urb);
849 atomic_inc(&urb->use_count);
850 atomic_inc(&urb->dev->urbnum);
851 retval = submit_single_step_set_feature(hcd, urb, 0);
852 if (!retval && !wait_for_completion_timeout(&done,
853 msecs_to_jiffies(2000))) {
854 usb_kill_urb(urb);
855 retval = -ETIMEDOUT;
856 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
857 }
858out1:
859 usb_free_urb(urb);
860cleanup:
861 kfree(dr);
862 kfree(buf);
863 return retval;
864}
865#endif /* CONFIG_USB_HCD_TEST_MODE */
866/*-------------------------------------------------------------------------*/
867
868static int ehci_hub_control (
869 struct usb_hcd *hcd,
870 u16 typeReq,
871 u16 wValue,
872 u16 wIndex,
873 char *buf,
874 u16 wLength
875) {
876 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
877 int ports = HCS_N_PORTS (ehci->hcs_params);
878 u32 __iomem *status_reg = &ehci->regs->port_status[
879 (wIndex & 0xff) - 1];
880 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
881 u32 temp, temp1, status;
882 unsigned long flags;
883 int retval = 0;
884 unsigned selector;
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, khubd 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->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(20);
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 ehci_writel(ehci, temp & ~PORT_POWER,
966 status_reg);
967 break;
968 case USB_PORT_FEAT_C_CONNECTION:
969 ehci_writel(ehci, temp | PORT_CSC, status_reg);
970 break;
971 case USB_PORT_FEAT_C_OVER_CURRENT:
972 ehci_writel(ehci, temp | PORT_OCC, status_reg);
973 break;
974 case USB_PORT_FEAT_C_RESET:
975 /* GetPortStatus clears reset */
976 break;
977 default:
978 goto error;
979 }
980 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
981 break;
982 case GetHubDescriptor:
983 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
984 buf);
985 break;
986 case GetHubStatus:
987 /* no hub-wide feature/status flags */
988 memset (buf, 0, 4);
989 //cpu_to_le32s ((u32 *) buf);
990 break;
991 case GetPortStatus:
992 if (!wIndex || wIndex > ports)
993 goto error;
994 wIndex--;
995 status = 0;
996 temp = ehci_readl(ehci, status_reg);
997
998 // wPortChange bits
999 if (temp & PORT_CSC)
1000 status |= USB_PORT_STAT_C_CONNECTION << 16;
1001 if (temp & PORT_PEC)
1002 status |= USB_PORT_STAT_C_ENABLE << 16;
1003
1004 if ((temp & PORT_OCC) && !ignore_oc){
1005 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1006
1007 /*
1008 * Hubs should disable port power on over-current.
1009 * However, not all EHCI implementations do this
1010 * automatically, even if they _do_ support per-port
1011 * power switching; they're allowed to just limit the
1012 * current. khubd will turn the power back on.
1013 */
1014 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1015 && HCS_PPC(ehci->hcs_params)) {
1016 ehci_writel(ehci,
1017 temp & ~(PORT_RWC_BITS | PORT_POWER),
1018 status_reg);
1019 temp = ehci_readl(ehci, status_reg);
1020 }
1021 }
1022
1023 /* no reset or resume pending */
1024 if (!ehci->reset_done[wIndex]) {
1025
1026 /* Remote Wakeup received? */
1027 if (temp & PORT_RESUME) {
1028 /* resume signaling for 20 msec */
1029 ehci->reset_done[wIndex] = jiffies
1030 + msecs_to_jiffies(20);
1031 usb_hcd_start_port_resume(&hcd->self, wIndex);
1032 set_bit(wIndex, &ehci->resuming_ports);
1033 /* check the port again */
1034 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
1035 ehci->reset_done[wIndex]);
1036 }
1037
1038 /* reset or resume not yet complete */
1039 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
1040 ; /* wait until it is complete */
1041
1042 /* resume completed */
1043 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
1044 clear_bit(wIndex, &ehci->suspended_ports);
1045 set_bit(wIndex, &ehci->port_c_suspend);
1046 ehci->reset_done[wIndex] = 0;
1047 usb_hcd_end_port_resume(&hcd->self, wIndex);
1048
1049 /* stop resume signaling */
1050 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
1051 ehci_writel(ehci, temp, status_reg);
1052 clear_bit(wIndex, &ehci->resuming_ports);
1053 retval = ehci_handshake(ehci, status_reg,
1054 PORT_RESUME, 0, 2000 /* 2msec */);
1055 if (retval != 0) {
1056 ehci_err(ehci, "port %d resume error %d\n",
1057 wIndex + 1, retval);
1058 goto error;
1059 }
1060 temp = ehci_readl(ehci, status_reg);
1061
1062 /* whoever resets must GetPortStatus to complete it!! */
1063 } else {
1064 status |= USB_PORT_STAT_C_RESET << 16;
1065 ehci->reset_done [wIndex] = 0;
1066
1067 /* force reset to complete */
1068 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
1069 status_reg);
1070 /* REVISIT: some hardware needs 550+ usec to clear
1071 * this bit; seems too long to spin routinely...
1072 */
1073 retval = ehci_handshake(ehci, status_reg,
1074 PORT_RESET, 0, 1000);
1075 if (retval != 0) {
1076 ehci_err (ehci, "port %d reset error %d\n",
1077 wIndex + 1, retval);
1078 goto error;
1079 }
1080
1081 /* see what we found out */
1082 temp = check_reset_complete (ehci, wIndex, status_reg,
1083 ehci_readl(ehci, status_reg));
1084 }
1085
1086 /* transfer dedicated ports to the companion hc */
1087 if ((temp & PORT_CONNECT) &&
1088 test_bit(wIndex, &ehci->companion_ports)) {
1089 temp &= ~PORT_RWC_BITS;
1090 temp |= PORT_OWNER;
1091 ehci_writel(ehci, temp, status_reg);
1092 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
1093 temp = ehci_readl(ehci, status_reg);
1094 }
1095
1096 /*
1097 * Even if OWNER is set, there's no harm letting khubd
1098 * see the wPortStatus values (they should all be 0 except
1099 * for PORT_POWER anyway).
1100 */
1101
1102 if (temp & PORT_CONNECT) {
1103 status |= USB_PORT_STAT_CONNECTION;
1104 // status may be from integrated TT
1105 if (ehci->has_hostpc) {
1106 temp1 = ehci_readl(ehci, hostpc_reg);
1107 status |= ehci_port_speed(ehci, temp1);
1108 } else
1109 status |= ehci_port_speed(ehci, temp);
1110 }
1111 if (temp & PORT_PE)
1112 status |= USB_PORT_STAT_ENABLE;
1113
1114 /* maybe the port was unsuspended without our knowledge */
1115 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
1116 status |= USB_PORT_STAT_SUSPEND;
1117 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1118 clear_bit(wIndex, &ehci->suspended_ports);
1119 clear_bit(wIndex, &ehci->resuming_ports);
1120 ehci->reset_done[wIndex] = 0;
1121 if (temp & PORT_PE)
1122 set_bit(wIndex, &ehci->port_c_suspend);
1123 usb_hcd_end_port_resume(&hcd->self, wIndex);
1124 }
1125
1126 if (temp & PORT_OC)
1127 status |= USB_PORT_STAT_OVERCURRENT;
1128 if (temp & PORT_RESET)
1129 status |= USB_PORT_STAT_RESET;
1130 if (temp & PORT_POWER)
1131 status |= USB_PORT_STAT_POWER;
1132 if (test_bit(wIndex, &ehci->port_c_suspend))
1133 status |= USB_PORT_STAT_C_SUSPEND << 16;
1134
1135 if (status & ~0xffff) /* only if wPortChange is interesting */
1136 dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1137 put_unaligned_le32(status, buf);
1138 break;
1139 case SetHubFeature:
1140 switch (wValue) {
1141 case C_HUB_LOCAL_POWER:
1142 case C_HUB_OVER_CURRENT:
1143 /* no hub-wide feature/status flags */
1144 break;
1145 default:
1146 goto error;
1147 }
1148 break;
1149 case SetPortFeature:
1150 selector = wIndex >> 8;
1151 wIndex &= 0xff;
1152 if (unlikely(ehci->debug)) {
1153 /* If the debug port is active any port
1154 * feature requests should get denied */
1155 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1156 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1157 retval = -ENODEV;
1158 goto error_exit;
1159 }
1160 }
1161 if (!wIndex || wIndex > ports)
1162 goto error;
1163 wIndex--;
1164 temp = ehci_readl(ehci, status_reg);
1165 if (temp & PORT_OWNER)
1166 break;
1167
1168 temp &= ~PORT_RWC_BITS;
1169 switch (wValue) {
1170 case USB_PORT_FEAT_SUSPEND:
1171 if (ehci->no_selective_suspend)
1172 break;
1173 if ((temp & PORT_PE) == 0
1174 || (temp & PORT_RESET) != 0)
1175 goto error;
1176
1177 /* After above check the port must be connected.
1178 * Set appropriate bit thus could put phy into low power
1179 * mode if we have tdi_phy_lpm feature
1180 */
1181 temp &= ~PORT_WKCONN_E;
1182 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1183 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1184 if (ehci->has_tdi_phy_lpm) {
1185 spin_unlock_irqrestore(&ehci->lock, flags);
1186 msleep(5);/* 5ms for HCD enter low pwr mode */
1187 spin_lock_irqsave(&ehci->lock, flags);
1188 temp1 = ehci_readl(ehci, hostpc_reg);
1189 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1190 hostpc_reg);
1191 temp1 = ehci_readl(ehci, hostpc_reg);
1192 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1193 wIndex, (temp1 & HOSTPC_PHCD) ?
1194 "succeeded" : "failed");
1195 }
1196 set_bit(wIndex, &ehci->suspended_ports);
1197 break;
1198 case USB_PORT_FEAT_POWER:
1199 if (HCS_PPC (ehci->hcs_params))
1200 ehci_writel(ehci, temp | PORT_POWER,
1201 status_reg);
1202 break;
1203 case USB_PORT_FEAT_RESET:
1204 if (temp & (PORT_SUSPEND|PORT_RESUME))
1205 goto error;
1206 /* line status bits may report this as low speed,
1207 * which can be fine if this root hub has a
1208 * transaction translator built in.
1209 */
1210 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1211 && !ehci_is_TDI(ehci)
1212 && PORT_USB11 (temp)) {
1213 ehci_dbg (ehci,
1214 "port %d low speed --> companion\n",
1215 wIndex + 1);
1216 temp |= PORT_OWNER;
1217 } else {
1218 temp |= PORT_RESET;
1219 temp &= ~PORT_PE;
1220
1221 /*
1222 * caller must wait, then call GetPortStatus
1223 * usb 2.0 spec says 50 ms resets on root
1224 */
1225 ehci->reset_done [wIndex] = jiffies
1226 + msecs_to_jiffies (50);
1227 }
1228 ehci_writel(ehci, temp, status_reg);
1229 break;
1230
1231 /* For downstream facing ports (these): one hub port is put
1232 * into test mode according to USB2 11.24.2.13, then the hub
1233 * must be reset (which for root hub now means rmmod+modprobe,
1234 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1235 * about the EHCI-specific stuff.
1236 */
1237 case USB_PORT_FEAT_TEST:
1238#ifdef CONFIG_USB_HCD_TEST_MODE
1239 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1240 spin_unlock_irqrestore(&ehci->lock, flags);
1241 retval = ehset_single_step_set_feature(hcd,
1242 wIndex);
1243 spin_lock_irqsave(&ehci->lock, flags);
1244 break;
1245 }
1246#endif
1247 if (!selector || selector > 5)
1248 goto error;
1249 spin_unlock_irqrestore(&ehci->lock, flags);
1250 ehci_quiesce(ehci);
1251 spin_lock_irqsave(&ehci->lock, flags);
1252
1253 /* Put all enabled ports into suspend */
1254 while (ports--) {
1255 u32 __iomem *sreg =
1256 &ehci->regs->port_status[ports];
1257
1258 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1259 if (temp & PORT_PE)
1260 ehci_writel(ehci, temp | PORT_SUSPEND,
1261 sreg);
1262 }
1263
1264 spin_unlock_irqrestore(&ehci->lock, flags);
1265 ehci_halt(ehci);
1266 spin_lock_irqsave(&ehci->lock, flags);
1267
1268 temp = ehci_readl(ehci, status_reg);
1269 temp |= selector << 16;
1270 ehci_writel(ehci, temp, status_reg);
1271 break;
1272
1273 default:
1274 goto error;
1275 }
1276 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1277 break;
1278
1279 default:
1280error:
1281 /* "stall" on error */
1282 retval = -EPIPE;
1283 }
1284error_exit:
1285 spin_unlock_irqrestore (&ehci->lock, flags);
1286 return retval;
1287}
1288
1289static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1290{
1291 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1292
1293 if (ehci_is_TDI(ehci))
1294 return;
1295 set_owner(ehci, --portnum, PORT_OWNER);
1296}
1297
1298static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1299{
1300 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1301 u32 __iomem *reg;
1302
1303 if (ehci_is_TDI(ehci))
1304 return 0;
1305 reg = &ehci->regs->port_status[portnum - 1];
1306 return ehci_readl(ehci, reg) & PORT_OWNER;
1307}