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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
45/* After a power loss, ports that were owned by the companion must be
46 * reset so that the companion can still own them.
47 */
48static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
49{
50 u32 __iomem *reg;
51 u32 status;
52 int port;
53 __le32 buf;
54 struct usb_hcd *hcd = ehci_to_hcd(ehci);
55
56 if (!ehci->owned_ports)
57 return;
58
59 /* Give the connections some time to appear */
60 msleep(20);
61
62 port = HCS_N_PORTS(ehci->hcs_params);
63 while (port--) {
64 if (test_bit(port, &ehci->owned_ports)) {
65 reg = &ehci->regs->port_status[port];
66 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
67
68 /* Port already owned by companion? */
69 if (status & PORT_OWNER)
70 clear_bit(port, &ehci->owned_ports);
71 else if (test_bit(port, &ehci->companion_ports))
72 ehci_writel(ehci, status & ~PORT_PE, reg);
73 else
74 ehci_hub_control(hcd, SetPortFeature,
75 USB_PORT_FEAT_RESET, port + 1,
76 NULL, 0);
77 }
78 }
79
80 if (!ehci->owned_ports)
81 return;
82 msleep(90); /* Wait for resets to complete */
83
84 port = HCS_N_PORTS(ehci->hcs_params);
85 while (port--) {
86 if (test_bit(port, &ehci->owned_ports)) {
87 ehci_hub_control(hcd, GetPortStatus,
88 0, port + 1,
89 (char *) &buf, sizeof(buf));
90
91 /* The companion should now own the port,
92 * but if something went wrong the port must not
93 * remain enabled.
94 */
95 reg = &ehci->regs->port_status[port];
96 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
97 if (status & PORT_OWNER)
98 ehci_writel(ehci, status | PORT_CSC, reg);
99 else {
100 ehci_dbg(ehci, "failed handover port %d: %x\n",
101 port + 1, status);
102 ehci_writel(ehci, status & ~PORT_PE, reg);
103 }
104 }
105 }
106
107 ehci->owned_ports = 0;
108}
109
110static int ehci_port_change(struct ehci_hcd *ehci)
111{
112 int i = HCS_N_PORTS(ehci->hcs_params);
113
114 /* First check if the controller indicates a change event */
115
116 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
117 return 1;
118
119 /*
120 * Not all controllers appear to update this while going from D3 to D0,
121 * so check the individual port status registers as well
122 */
123
124 while (i--)
125 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
126 return 1;
127
128 return 0;
129}
130
131static __maybe_unused void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
132 bool suspending, bool do_wakeup)
133{
134 int port;
135 u32 temp;
136 unsigned long flags;
137
138 /* If remote wakeup is enabled for the root hub but disabled
139 * for the controller, we must adjust all the port wakeup flags
140 * when the controller is suspended or resumed. In all other
141 * cases they don't need to be changed.
142 */
143 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
144 return;
145
146 spin_lock_irqsave(&ehci->lock, flags);
147
148 /* clear phy low-power mode before changing wakeup flags */
149 if (ehci->has_hostpc) {
150 port = HCS_N_PORTS(ehci->hcs_params);
151 while (port--) {
152 u32 __iomem *hostpc_reg;
153
154 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
155 + HOSTPC0 + 4 * port);
156 temp = ehci_readl(ehci, hostpc_reg);
157 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
158 }
159 spin_unlock_irqrestore(&ehci->lock, flags);
160 msleep(5);
161 spin_lock_irqsave(&ehci->lock, flags);
162 }
163
164 port = HCS_N_PORTS(ehci->hcs_params);
165 while (port--) {
166 u32 __iomem *reg = &ehci->regs->port_status[port];
167 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
168 u32 t2 = t1 & ~PORT_WAKE_BITS;
169
170 /* If we are suspending the controller, clear the flags.
171 * If we are resuming the controller, set the wakeup flags.
172 */
173 if (!suspending) {
174 if (t1 & PORT_CONNECT)
175 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
176 else
177 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
178 }
179 ehci_vdbg(ehci, "port %d, %08x -> %08x\n",
180 port + 1, t1, t2);
181 ehci_writel(ehci, t2, reg);
182 }
183
184 /* enter phy low-power mode again */
185 if (ehci->has_hostpc) {
186 port = HCS_N_PORTS(ehci->hcs_params);
187 while (port--) {
188 u32 __iomem *hostpc_reg;
189
190 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
191 + HOSTPC0 + 4 * port);
192 temp = ehci_readl(ehci, hostpc_reg);
193 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
194 }
195 }
196
197 /* Does the root hub have a port wakeup pending? */
198 if (!suspending && ehci_port_change(ehci))
199 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
200
201 spin_unlock_irqrestore(&ehci->lock, flags);
202}
203
204static int ehci_bus_suspend (struct usb_hcd *hcd)
205{
206 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
207 int port;
208 int mask;
209 int changed;
210
211 ehci_dbg(ehci, "suspend root hub\n");
212
213 if (time_before (jiffies, ehci->next_statechange))
214 msleep(5);
215 del_timer_sync(&ehci->watchdog);
216 del_timer_sync(&ehci->iaa_watchdog);
217
218 spin_lock_irq (&ehci->lock);
219
220 /* Once the controller is stopped, port resumes that are already
221 * in progress won't complete. Hence if remote wakeup is enabled
222 * for the root hub and any ports are in the middle of a resume or
223 * remote wakeup, we must fail the suspend.
224 */
225 if (hcd->self.root_hub->do_remote_wakeup) {
226 port = HCS_N_PORTS(ehci->hcs_params);
227 while (port--) {
228 if (ehci->reset_done[port] != 0) {
229 spin_unlock_irq(&ehci->lock);
230 ehci_dbg(ehci, "suspend failed because "
231 "port %d is resuming\n",
232 port + 1);
233 return -EBUSY;
234 }
235 }
236 }
237
238 /* stop schedules, clean any completed work */
239 if (HC_IS_RUNNING(hcd->state)) {
240 ehci_quiesce (ehci);
241 hcd->state = HC_STATE_QUIESCING;
242 }
243 ehci->command = ehci_readl(ehci, &ehci->regs->command);
244 ehci_work(ehci);
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 port = HCS_N_PORTS(ehci->hcs_params);
255 while (port--) {
256 u32 __iomem *reg = &ehci->regs->port_status [port];
257 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
258 u32 t2 = t1 & ~PORT_WAKE_BITS;
259
260 /* keep track of which ports we suspend */
261 if (t1 & PORT_OWNER)
262 set_bit(port, &ehci->owned_ports);
263 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
264 t2 |= PORT_SUSPEND;
265 set_bit(port, &ehci->bus_suspended);
266 }
267
268 /* enable remote wakeup on all ports, if told to do so */
269 if (hcd->self.root_hub->do_remote_wakeup) {
270 /* only enable appropriate wake bits, otherwise the
271 * hardware can not go phy low power mode. If a race
272 * condition happens here(connection change during bits
273 * set), the port change detection will finally fix it.
274 */
275 if (t1 & PORT_CONNECT)
276 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
277 else
278 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
279 }
280
281 if (t1 != t2) {
282 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
283 port + 1, t1, t2);
284 ehci_writel(ehci, t2, reg);
285 changed = 1;
286 }
287 }
288
289 if (changed && ehci->has_hostpc) {
290 spin_unlock_irq(&ehci->lock);
291 msleep(5); /* 5 ms for HCD to enter low-power mode */
292 spin_lock_irq(&ehci->lock);
293
294 port = HCS_N_PORTS(ehci->hcs_params);
295 while (port--) {
296 u32 __iomem *hostpc_reg;
297 u32 t3;
298
299 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
300 + HOSTPC0 + 4 * port);
301 t3 = ehci_readl(ehci, hostpc_reg);
302 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
303 t3 = ehci_readl(ehci, hostpc_reg);
304 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
305 port, (t3 & HOSTPC_PHCD) ?
306 "succeeded" : "failed");
307 }
308 }
309
310 /* Apparently some devices need a >= 1-uframe delay here */
311 if (ehci->bus_suspended)
312 udelay(150);
313
314 /* turn off now-idle HC */
315 ehci_halt (ehci);
316 hcd->state = HC_STATE_SUSPENDED;
317
318 if (ehci->reclaim)
319 end_unlink_async(ehci);
320
321 /* allow remote wakeup */
322 mask = INTR_MASK;
323 if (!hcd->self.root_hub->do_remote_wakeup)
324 mask &= ~STS_PCD;
325 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
326 ehci_readl(ehci, &ehci->regs->intr_enable);
327
328 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
329 spin_unlock_irq (&ehci->lock);
330
331 /* ehci_work() may have re-enabled the watchdog timer, which we do not
332 * want, and so we must delete any pending watchdog timer events.
333 */
334 del_timer_sync(&ehci->watchdog);
335 return 0;
336}
337
338
339/* caller has locked the root hub, and should reset/reinit on error */
340static int ehci_bus_resume (struct usb_hcd *hcd)
341{
342 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
343 u32 temp;
344 u32 power_okay;
345 int i;
346 unsigned long resume_needed = 0;
347
348 if (time_before (jiffies, ehci->next_statechange))
349 msleep(5);
350 spin_lock_irq (&ehci->lock);
351 if (!HCD_HW_ACCESSIBLE(hcd)) {
352 spin_unlock_irq(&ehci->lock);
353 return -ESHUTDOWN;
354 }
355
356 if (unlikely(ehci->debug)) {
357 if (!dbgp_reset_prep())
358 ehci->debug = NULL;
359 else
360 dbgp_external_startup();
361 }
362
363 /* Ideally and we've got a real resume here, and no port's power
364 * was lost. (For PCI, that means Vaux was maintained.) But we
365 * could instead be restoring a swsusp snapshot -- so that BIOS was
366 * the last user of the controller, not reset/pm hardware keeping
367 * state we gave to it.
368 */
369 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
370 ehci_dbg(ehci, "resume root hub%s\n",
371 power_okay ? "" : " after power loss");
372
373 /* at least some APM implementations will try to deliver
374 * IRQs right away, so delay them until we're ready.
375 */
376 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
377
378 /* re-init operational registers */
379 ehci_writel(ehci, 0, &ehci->regs->segment);
380 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
381 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
382
383 /* restore CMD_RUN, framelist size, and irq threshold */
384 ehci_writel(ehci, ehci->command, &ehci->regs->command);
385
386 /* Some controller/firmware combinations need a delay during which
387 * they set up the port statuses. See Bugzilla #8190. */
388 spin_unlock_irq(&ehci->lock);
389 msleep(8);
390 spin_lock_irq(&ehci->lock);
391
392 /* clear phy low-power mode before resume */
393 if (ehci->bus_suspended && ehci->has_hostpc) {
394 i = HCS_N_PORTS(ehci->hcs_params);
395 while (i--) {
396 if (test_bit(i, &ehci->bus_suspended)) {
397 u32 __iomem *hostpc_reg;
398
399 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
400 + HOSTPC0 + 4 * i);
401 temp = ehci_readl(ehci, hostpc_reg);
402 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
403 hostpc_reg);
404 }
405 }
406 spin_unlock_irq(&ehci->lock);
407 msleep(5);
408 spin_lock_irq(&ehci->lock);
409 }
410
411 /* manually resume the ports we suspended during bus_suspend() */
412 i = HCS_N_PORTS (ehci->hcs_params);
413 while (i--) {
414 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
415 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
416 if (test_bit(i, &ehci->bus_suspended) &&
417 (temp & PORT_SUSPEND)) {
418 temp |= PORT_RESUME;
419 set_bit(i, &resume_needed);
420 }
421 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
422 }
423
424 /* msleep for 20ms only if code is trying to resume port */
425 if (resume_needed) {
426 spin_unlock_irq(&ehci->lock);
427 msleep(20);
428 spin_lock_irq(&ehci->lock);
429 }
430
431 i = HCS_N_PORTS (ehci->hcs_params);
432 while (i--) {
433 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
434 if (test_bit(i, &resume_needed)) {
435 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
436 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
437 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
438 }
439 }
440 (void) ehci_readl(ehci, &ehci->regs->command);
441
442 /* maybe re-activate the schedule(s) */
443 temp = 0;
444 if (ehci->async->qh_next.qh)
445 temp |= CMD_ASE;
446 if (ehci->periodic_sched)
447 temp |= CMD_PSE;
448 if (temp) {
449 ehci->command |= temp;
450 ehci_writel(ehci, ehci->command, &ehci->regs->command);
451 }
452
453 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
454 hcd->state = HC_STATE_RUNNING;
455
456 /* Now we can safely re-enable irqs */
457 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
458
459 spin_unlock_irq (&ehci->lock);
460 ehci_handover_companion_ports(ehci);
461 return 0;
462}
463
464#else
465
466#define ehci_bus_suspend NULL
467#define ehci_bus_resume NULL
468
469#endif /* CONFIG_PM */
470
471/*-------------------------------------------------------------------------*/
472
473/*
474 * Sets the owner of a port
475 */
476static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
477{
478 u32 __iomem *status_reg;
479 u32 port_status;
480 int try;
481
482 status_reg = &ehci->regs->port_status[portnum];
483
484 /*
485 * The controller won't set the OWNER bit if the port is
486 * enabled, so this loop will sometimes require at least two
487 * iterations: one to disable the port and one to set OWNER.
488 */
489 for (try = 4; try > 0; --try) {
490 spin_lock_irq(&ehci->lock);
491 port_status = ehci_readl(ehci, status_reg);
492 if ((port_status & PORT_OWNER) == new_owner
493 || (port_status & (PORT_OWNER | PORT_CONNECT))
494 == 0)
495 try = 0;
496 else {
497 port_status ^= PORT_OWNER;
498 port_status &= ~(PORT_PE | PORT_RWC_BITS);
499 ehci_writel(ehci, port_status, status_reg);
500 }
501 spin_unlock_irq(&ehci->lock);
502 if (try > 1)
503 msleep(5);
504 }
505}
506
507/*-------------------------------------------------------------------------*/
508
509static int check_reset_complete (
510 struct ehci_hcd *ehci,
511 int index,
512 u32 __iomem *status_reg,
513 int port_status
514) {
515 if (!(port_status & PORT_CONNECT))
516 return port_status;
517
518 /* if reset finished and it's still not enabled -- handoff */
519 if (!(port_status & PORT_PE)) {
520
521 /* with integrated TT, there's nobody to hand it to! */
522 if (ehci_is_TDI(ehci)) {
523 ehci_dbg (ehci,
524 "Failed to enable port %d on root hub TT\n",
525 index+1);
526 return port_status;
527 }
528
529 ehci_dbg (ehci, "port %d full speed --> companion\n",
530 index + 1);
531
532 // what happens if HCS_N_CC(params) == 0 ?
533 port_status |= PORT_OWNER;
534 port_status &= ~PORT_RWC_BITS;
535 ehci_writel(ehci, port_status, status_reg);
536
537 /* ensure 440EPX ohci controller state is operational */
538 if (ehci->has_amcc_usb23)
539 set_ohci_hcfs(ehci, 1);
540 } else {
541 ehci_dbg (ehci, "port %d high speed\n", index + 1);
542 /* ensure 440EPx ohci controller state is suspended */
543 if (ehci->has_amcc_usb23)
544 set_ohci_hcfs(ehci, 0);
545 }
546
547 return port_status;
548}
549
550/*-------------------------------------------------------------------------*/
551
552
553/* build "status change" packet (one or two bytes) from HC registers */
554
555static int
556ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
557{
558 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
559 u32 temp, status = 0;
560 u32 mask;
561 int ports, i, retval = 1;
562 unsigned long flags;
563 u32 ppcd = 0;
564
565 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
566 if (!HC_IS_RUNNING(hcd->state))
567 return 0;
568
569 /* init status to no-changes */
570 buf [0] = 0;
571 ports = HCS_N_PORTS (ehci->hcs_params);
572 if (ports > 7) {
573 buf [1] = 0;
574 retval++;
575 }
576
577 /* Some boards (mostly VIA?) report bogus overcurrent indications,
578 * causing massive log spam unless we completely ignore them. It
579 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
580 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
581 * PORT_POWER; that's surprising, but maybe within-spec.
582 */
583 if (!ignore_oc)
584 mask = PORT_CSC | PORT_PEC | PORT_OCC;
585 else
586 mask = PORT_CSC | PORT_PEC;
587 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
588
589 /* no hub change reports (bit 0) for now (power, ...) */
590
591 /* port N changes (bit N)? */
592 spin_lock_irqsave (&ehci->lock, flags);
593
594 /* get per-port change detect bits */
595 if (ehci->has_ppcd)
596 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
597
598 for (i = 0; i < ports; i++) {
599 /* leverage per-port change bits feature */
600 if (ehci->has_ppcd && !(ppcd & (1 << i)))
601 continue;
602 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
603
604 /*
605 * Return status information even for ports with OWNER set.
606 * Otherwise khubd wouldn't see the disconnect event when a
607 * high-speed device is switched over to the companion
608 * controller by the user.
609 */
610
611 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
612 || (ehci->reset_done[i] && time_after_eq(
613 jiffies, ehci->reset_done[i]))) {
614 if (i < 7)
615 buf [0] |= 1 << (i + 1);
616 else
617 buf [1] |= 1 << (i - 7);
618 status = STS_PCD;
619 }
620 }
621 /* FIXME autosuspend idle root hubs */
622 spin_unlock_irqrestore (&ehci->lock, flags);
623 return status ? retval : 0;
624}
625
626/*-------------------------------------------------------------------------*/
627
628static void
629ehci_hub_descriptor (
630 struct ehci_hcd *ehci,
631 struct usb_hub_descriptor *desc
632) {
633 int ports = HCS_N_PORTS (ehci->hcs_params);
634 u16 temp;
635
636 desc->bDescriptorType = 0x29;
637 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
638 desc->bHubContrCurrent = 0;
639
640 desc->bNbrPorts = ports;
641 temp = 1 + (ports / 8);
642 desc->bDescLength = 7 + 2 * temp;
643
644 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
645 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
646 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
647
648 temp = 0x0008; /* per-port overcurrent reporting */
649 if (HCS_PPC (ehci->hcs_params))
650 temp |= 0x0001; /* per-port power control */
651 else
652 temp |= 0x0002; /* no power switching */
653#if 0
654// re-enable when we support USB_PORT_FEAT_INDICATOR below.
655 if (HCS_INDICATOR (ehci->hcs_params))
656 temp |= 0x0080; /* per-port indicators (LEDs) */
657#endif
658 desc->wHubCharacteristics = cpu_to_le16(temp);
659}
660
661/*-------------------------------------------------------------------------*/
662
663static int ehci_hub_control (
664 struct usb_hcd *hcd,
665 u16 typeReq,
666 u16 wValue,
667 u16 wIndex,
668 char *buf,
669 u16 wLength
670) {
671 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
672 int ports = HCS_N_PORTS (ehci->hcs_params);
673 u32 __iomem *status_reg = &ehci->regs->port_status[
674 (wIndex & 0xff) - 1];
675 u32 __iomem *hostpc_reg = NULL;
676 u32 temp, temp1, status;
677 unsigned long flags;
678 int retval = 0;
679 unsigned selector;
680
681 /*
682 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
683 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
684 * (track current state ourselves) ... blink for diagnostics,
685 * power, "this is the one", etc. EHCI spec supports this.
686 */
687
688 if (ehci->has_hostpc)
689 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
690 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
691 spin_lock_irqsave (&ehci->lock, flags);
692 switch (typeReq) {
693 case ClearHubFeature:
694 switch (wValue) {
695 case C_HUB_LOCAL_POWER:
696 case C_HUB_OVER_CURRENT:
697 /* no hub-wide feature/status flags */
698 break;
699 default:
700 goto error;
701 }
702 break;
703 case ClearPortFeature:
704 if (!wIndex || wIndex > ports)
705 goto error;
706 wIndex--;
707 temp = ehci_readl(ehci, status_reg);
708
709 /*
710 * Even if OWNER is set, so the port is owned by the
711 * companion controller, khubd needs to be able to clear
712 * the port-change status bits (especially
713 * USB_PORT_STAT_C_CONNECTION).
714 */
715
716 switch (wValue) {
717 case USB_PORT_FEAT_ENABLE:
718 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
719 break;
720 case USB_PORT_FEAT_C_ENABLE:
721 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
722 status_reg);
723 break;
724 case USB_PORT_FEAT_SUSPEND:
725 if (temp & PORT_RESET)
726 goto error;
727 if (ehci->no_selective_suspend)
728 break;
729#ifdef CONFIG_USB_OTG
730 if ((hcd->self.otg_port == (wIndex + 1))
731 && hcd->self.b_hnp_enable) {
732 otg_start_hnp(ehci->transceiver);
733 break;
734 }
735#endif
736 if (!(temp & PORT_SUSPEND))
737 break;
738 if ((temp & PORT_PE) == 0)
739 goto error;
740
741 /* clear phy low-power mode before resume */
742 if (hostpc_reg) {
743 temp1 = ehci_readl(ehci, hostpc_reg);
744 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
745 hostpc_reg);
746 spin_unlock_irqrestore(&ehci->lock, flags);
747 msleep(5);/* wait to leave low-power mode */
748 spin_lock_irqsave(&ehci->lock, flags);
749 }
750 /* resume signaling for 20 msec */
751 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
752 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
753 ehci->reset_done[wIndex] = jiffies
754 + msecs_to_jiffies(20);
755 break;
756 case USB_PORT_FEAT_C_SUSPEND:
757 clear_bit(wIndex, &ehci->port_c_suspend);
758 break;
759 case USB_PORT_FEAT_POWER:
760 if (HCS_PPC (ehci->hcs_params))
761 ehci_writel(ehci,
762 temp & ~(PORT_RWC_BITS | PORT_POWER),
763 status_reg);
764 break;
765 case USB_PORT_FEAT_C_CONNECTION:
766 if (ehci->has_lpm) {
767 /* clear PORTSC bits on disconnect */
768 temp &= ~PORT_LPM;
769 temp &= ~PORT_DEV_ADDR;
770 }
771 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
772 status_reg);
773 break;
774 case USB_PORT_FEAT_C_OVER_CURRENT:
775 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
776 status_reg);
777 break;
778 case USB_PORT_FEAT_C_RESET:
779 /* GetPortStatus clears reset */
780 break;
781 default:
782 goto error;
783 }
784 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
785 break;
786 case GetHubDescriptor:
787 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
788 buf);
789 break;
790 case GetHubStatus:
791 /* no hub-wide feature/status flags */
792 memset (buf, 0, 4);
793 //cpu_to_le32s ((u32 *) buf);
794 break;
795 case GetPortStatus:
796 if (!wIndex || wIndex > ports)
797 goto error;
798 wIndex--;
799 status = 0;
800 temp = ehci_readl(ehci, status_reg);
801
802 // wPortChange bits
803 if (temp & PORT_CSC)
804 status |= USB_PORT_STAT_C_CONNECTION << 16;
805 if (temp & PORT_PEC)
806 status |= USB_PORT_STAT_C_ENABLE << 16;
807
808 if ((temp & PORT_OCC) && !ignore_oc){
809 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
810
811 /*
812 * Hubs should disable port power on over-current.
813 * However, not all EHCI implementations do this
814 * automatically, even if they _do_ support per-port
815 * power switching; they're allowed to just limit the
816 * current. khubd will turn the power back on.
817 */
818 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
819 ehci_writel(ehci,
820 temp & ~(PORT_RWC_BITS | PORT_POWER),
821 status_reg);
822 temp = ehci_readl(ehci, status_reg);
823 }
824 }
825
826 /* whoever resumes must GetPortStatus to complete it!! */
827 if (temp & PORT_RESUME) {
828
829 /* Remote Wakeup received? */
830 if (!ehci->reset_done[wIndex]) {
831 /* resume signaling for 20 msec */
832 ehci->reset_done[wIndex] = jiffies
833 + msecs_to_jiffies(20);
834 /* check the port again */
835 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
836 ehci->reset_done[wIndex]);
837 }
838
839 /* resume completed? */
840 else if (time_after_eq(jiffies,
841 ehci->reset_done[wIndex])) {
842 clear_bit(wIndex, &ehci->suspended_ports);
843 set_bit(wIndex, &ehci->port_c_suspend);
844 ehci->reset_done[wIndex] = 0;
845
846 /* stop resume signaling */
847 temp = ehci_readl(ehci, status_reg);
848 ehci_writel(ehci,
849 temp & ~(PORT_RWC_BITS | PORT_RESUME),
850 status_reg);
851 retval = handshake(ehci, status_reg,
852 PORT_RESUME, 0, 2000 /* 2msec */);
853 if (retval != 0) {
854 ehci_err(ehci,
855 "port %d resume error %d\n",
856 wIndex + 1, retval);
857 goto error;
858 }
859 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
860 }
861 }
862
863 /* whoever resets must GetPortStatus to complete it!! */
864 if ((temp & PORT_RESET)
865 && time_after_eq(jiffies,
866 ehci->reset_done[wIndex])) {
867 status |= USB_PORT_STAT_C_RESET << 16;
868 ehci->reset_done [wIndex] = 0;
869
870 /* force reset to complete */
871 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
872 status_reg);
873 /* REVISIT: some hardware needs 550+ usec to clear
874 * this bit; seems too long to spin routinely...
875 */
876 retval = handshake(ehci, status_reg,
877 PORT_RESET, 0, 1000);
878 if (retval != 0) {
879 ehci_err (ehci, "port %d reset error %d\n",
880 wIndex + 1, retval);
881 goto error;
882 }
883
884 /* see what we found out */
885 temp = check_reset_complete (ehci, wIndex, status_reg,
886 ehci_readl(ehci, status_reg));
887 }
888
889 if (!(temp & (PORT_RESUME|PORT_RESET)))
890 ehci->reset_done[wIndex] = 0;
891
892 /* transfer dedicated ports to the companion hc */
893 if ((temp & PORT_CONNECT) &&
894 test_bit(wIndex, &ehci->companion_ports)) {
895 temp &= ~PORT_RWC_BITS;
896 temp |= PORT_OWNER;
897 ehci_writel(ehci, temp, status_reg);
898 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
899 temp = ehci_readl(ehci, status_reg);
900 }
901
902 /*
903 * Even if OWNER is set, there's no harm letting khubd
904 * see the wPortStatus values (they should all be 0 except
905 * for PORT_POWER anyway).
906 */
907
908 if (temp & PORT_CONNECT) {
909 status |= USB_PORT_STAT_CONNECTION;
910 // status may be from integrated TT
911 if (ehci->has_hostpc) {
912 temp1 = ehci_readl(ehci, hostpc_reg);
913 status |= ehci_port_speed(ehci, temp1);
914 } else
915 status |= ehci_port_speed(ehci, temp);
916 }
917 if (temp & PORT_PE)
918 status |= USB_PORT_STAT_ENABLE;
919
920 /* maybe the port was unsuspended without our knowledge */
921 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
922 status |= USB_PORT_STAT_SUSPEND;
923 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
924 clear_bit(wIndex, &ehci->suspended_ports);
925 ehci->reset_done[wIndex] = 0;
926 if (temp & PORT_PE)
927 set_bit(wIndex, &ehci->port_c_suspend);
928 }
929
930 if (temp & PORT_OC)
931 status |= USB_PORT_STAT_OVERCURRENT;
932 if (temp & PORT_RESET)
933 status |= USB_PORT_STAT_RESET;
934 if (temp & PORT_POWER)
935 status |= USB_PORT_STAT_POWER;
936 if (test_bit(wIndex, &ehci->port_c_suspend))
937 status |= USB_PORT_STAT_C_SUSPEND << 16;
938
939#ifndef VERBOSE_DEBUG
940 if (status & ~0xffff) /* only if wPortChange is interesting */
941#endif
942 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
943 put_unaligned_le32(status, buf);
944 break;
945 case SetHubFeature:
946 switch (wValue) {
947 case C_HUB_LOCAL_POWER:
948 case C_HUB_OVER_CURRENT:
949 /* no hub-wide feature/status flags */
950 break;
951 default:
952 goto error;
953 }
954 break;
955 case SetPortFeature:
956 selector = wIndex >> 8;
957 wIndex &= 0xff;
958 if (unlikely(ehci->debug)) {
959 /* If the debug port is active any port
960 * feature requests should get denied */
961 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
962 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
963 retval = -ENODEV;
964 goto error_exit;
965 }
966 }
967 if (!wIndex || wIndex > ports)
968 goto error;
969 wIndex--;
970 temp = ehci_readl(ehci, status_reg);
971 if (temp & PORT_OWNER)
972 break;
973
974 temp &= ~PORT_RWC_BITS;
975 switch (wValue) {
976 case USB_PORT_FEAT_SUSPEND:
977 if (ehci->no_selective_suspend)
978 break;
979 if ((temp & PORT_PE) == 0
980 || (temp & PORT_RESET) != 0)
981 goto error;
982
983 /* After above check the port must be connected.
984 * Set appropriate bit thus could put phy into low power
985 * mode if we have hostpc feature
986 */
987 temp &= ~PORT_WKCONN_E;
988 temp |= PORT_WKDISC_E | PORT_WKOC_E;
989 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
990 if (hostpc_reg) {
991 spin_unlock_irqrestore(&ehci->lock, flags);
992 msleep(5);/* 5ms for HCD enter low pwr mode */
993 spin_lock_irqsave(&ehci->lock, flags);
994 temp1 = ehci_readl(ehci, hostpc_reg);
995 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
996 hostpc_reg);
997 temp1 = ehci_readl(ehci, hostpc_reg);
998 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
999 wIndex, (temp1 & HOSTPC_PHCD) ?
1000 "succeeded" : "failed");
1001 }
1002 set_bit(wIndex, &ehci->suspended_ports);
1003 break;
1004 case USB_PORT_FEAT_POWER:
1005 if (HCS_PPC (ehci->hcs_params))
1006 ehci_writel(ehci, temp | PORT_POWER,
1007 status_reg);
1008 break;
1009 case USB_PORT_FEAT_RESET:
1010 if (temp & PORT_RESUME)
1011 goto error;
1012 /* line status bits may report this as low speed,
1013 * which can be fine if this root hub has a
1014 * transaction translator built in.
1015 */
1016 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1017 && !ehci_is_TDI(ehci)
1018 && PORT_USB11 (temp)) {
1019 ehci_dbg (ehci,
1020 "port %d low speed --> companion\n",
1021 wIndex + 1);
1022 temp |= PORT_OWNER;
1023 } else {
1024 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1025 temp |= PORT_RESET;
1026 temp &= ~PORT_PE;
1027
1028 /*
1029 * caller must wait, then call GetPortStatus
1030 * usb 2.0 spec says 50 ms resets on root
1031 */
1032 ehci->reset_done [wIndex] = jiffies
1033 + msecs_to_jiffies (50);
1034 }
1035 ehci_writel(ehci, temp, status_reg);
1036 break;
1037
1038 /* For downstream facing ports (these): one hub port is put
1039 * into test mode according to USB2 11.24.2.13, then the hub
1040 * must be reset (which for root hub now means rmmod+modprobe,
1041 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1042 * about the EHCI-specific stuff.
1043 */
1044 case USB_PORT_FEAT_TEST:
1045 if (!selector || selector > 5)
1046 goto error;
1047 ehci_quiesce(ehci);
1048
1049 /* Put all enabled ports into suspend */
1050 while (ports--) {
1051 u32 __iomem *sreg =
1052 &ehci->regs->port_status[ports];
1053
1054 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1055 if (temp & PORT_PE)
1056 ehci_writel(ehci, temp | PORT_SUSPEND,
1057 sreg);
1058 }
1059 ehci_halt(ehci);
1060 temp = ehci_readl(ehci, status_reg);
1061 temp |= selector << 16;
1062 ehci_writel(ehci, temp, status_reg);
1063 break;
1064
1065 default:
1066 goto error;
1067 }
1068 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1069 break;
1070
1071 default:
1072error:
1073 /* "stall" on error */
1074 retval = -EPIPE;
1075 }
1076error_exit:
1077 spin_unlock_irqrestore (&ehci->lock, flags);
1078 return retval;
1079}
1080
1081static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1082{
1083 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1084
1085 if (ehci_is_TDI(ehci))
1086 return;
1087 set_owner(ehci, --portnum, PORT_OWNER);
1088}
1089
1090static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1091{
1092 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1093 u32 __iomem *reg;
1094
1095 if (ehci_is_TDI(ehci))
1096 return 0;
1097 reg = &ehci->regs->port_status[portnum - 1];
1098 return ehci_readl(ehci, reg) & PORT_OWNER;
1099}
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 if (i < 7)
679 buf [0] |= 1 << (i + 1);
680 else
681 buf [1] |= 1 << (i - 7);
682 status = STS_PCD;
683 }
684 }
685
686 /* If a resume is in progress, make sure it can finish */
687 if (ehci->resuming_ports)
688 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
689
690 spin_unlock_irqrestore (&ehci->lock, flags);
691 return status ? retval : 0;
692}
693
694/*-------------------------------------------------------------------------*/
695
696static void
697ehci_hub_descriptor (
698 struct ehci_hcd *ehci,
699 struct usb_hub_descriptor *desc
700) {
701 int ports = HCS_N_PORTS (ehci->hcs_params);
702 u16 temp;
703
704 desc->bDescriptorType = USB_DT_HUB;
705 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
706 desc->bHubContrCurrent = 0;
707
708 desc->bNbrPorts = ports;
709 temp = 1 + (ports / 8);
710 desc->bDescLength = 7 + 2 * temp;
711
712 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
713 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
714 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
715
716 temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
717 if (HCS_PPC (ehci->hcs_params))
718 temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */
719 else
720 temp |= HUB_CHAR_NO_LPSM; /* no power switching */
721#if 0
722// re-enable when we support USB_PORT_FEAT_INDICATOR below.
723 if (HCS_INDICATOR (ehci->hcs_params))
724 temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */
725#endif
726 desc->wHubCharacteristics = cpu_to_le16(temp);
727}
728
729/*-------------------------------------------------------------------------*/
730
731int ehci_hub_control(
732 struct usb_hcd *hcd,
733 u16 typeReq,
734 u16 wValue,
735 u16 wIndex,
736 char *buf,
737 u16 wLength
738) {
739 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
740 int ports = HCS_N_PORTS (ehci->hcs_params);
741 u32 __iomem *status_reg, *hostpc_reg;
742 u32 temp, temp1, status;
743 unsigned long flags;
744 int retval = 0;
745 unsigned selector;
746
747 /*
748 * Avoid underflow while calculating (wIndex & 0xff) - 1.
749 * The compiler might deduce that wIndex can never be 0 and then
750 * optimize away the tests for !wIndex below.
751 */
752 temp = wIndex & 0xff;
753 temp -= (temp > 0);
754 status_reg = &ehci->regs->port_status[temp];
755 hostpc_reg = &ehci->regs->hostpc[temp];
756
757 /*
758 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
759 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
760 * (track current state ourselves) ... blink for diagnostics,
761 * power, "this is the one", etc. EHCI spec supports this.
762 */
763
764 spin_lock_irqsave (&ehci->lock, flags);
765 switch (typeReq) {
766 case ClearHubFeature:
767 switch (wValue) {
768 case C_HUB_LOCAL_POWER:
769 case C_HUB_OVER_CURRENT:
770 /* no hub-wide feature/status flags */
771 break;
772 default:
773 goto error;
774 }
775 break;
776 case ClearPortFeature:
777 if (!wIndex || wIndex > ports)
778 goto error;
779 wIndex--;
780 temp = ehci_readl(ehci, status_reg);
781 temp &= ~PORT_RWC_BITS;
782
783 /*
784 * Even if OWNER is set, so the port is owned by the
785 * companion controller, hub_wq needs to be able to clear
786 * the port-change status bits (especially
787 * USB_PORT_STAT_C_CONNECTION).
788 */
789
790 switch (wValue) {
791 case USB_PORT_FEAT_ENABLE:
792 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
793 break;
794 case USB_PORT_FEAT_C_ENABLE:
795 ehci_writel(ehci, temp | PORT_PEC, status_reg);
796 break;
797 case USB_PORT_FEAT_SUSPEND:
798 if (temp & PORT_RESET)
799 goto error;
800 if (ehci->no_selective_suspend)
801 break;
802#ifdef CONFIG_USB_OTG
803 if ((hcd->self.otg_port == (wIndex + 1))
804 && hcd->self.b_hnp_enable) {
805 otg_start_hnp(hcd->usb_phy->otg);
806 break;
807 }
808#endif
809 if (!(temp & PORT_SUSPEND))
810 break;
811 if ((temp & PORT_PE) == 0)
812 goto error;
813
814 /* clear phy low-power mode before resume */
815 if (ehci->has_tdi_phy_lpm) {
816 temp1 = ehci_readl(ehci, hostpc_reg);
817 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
818 hostpc_reg);
819 spin_unlock_irqrestore(&ehci->lock, flags);
820 msleep(5);/* wait to leave low-power mode */
821 spin_lock_irqsave(&ehci->lock, flags);
822 }
823 /* resume signaling for 20 msec */
824 temp &= ~PORT_WAKE_BITS;
825 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
826 ehci->reset_done[wIndex] = jiffies
827 + msecs_to_jiffies(USB_RESUME_TIMEOUT);
828 set_bit(wIndex, &ehci->resuming_ports);
829 usb_hcd_start_port_resume(&hcd->self, wIndex);
830 break;
831 case USB_PORT_FEAT_C_SUSPEND:
832 clear_bit(wIndex, &ehci->port_c_suspend);
833 break;
834 case USB_PORT_FEAT_POWER:
835 if (HCS_PPC(ehci->hcs_params)) {
836 spin_unlock_irqrestore(&ehci->lock, flags);
837 ehci_port_power(ehci, wIndex, false);
838 spin_lock_irqsave(&ehci->lock, flags);
839 }
840 break;
841 case USB_PORT_FEAT_C_CONNECTION:
842 ehci_writel(ehci, temp | PORT_CSC, status_reg);
843 break;
844 case USB_PORT_FEAT_C_OVER_CURRENT:
845 ehci_writel(ehci, temp | PORT_OCC, status_reg);
846 break;
847 case USB_PORT_FEAT_C_RESET:
848 /* GetPortStatus clears reset */
849 break;
850 default:
851 goto error;
852 }
853 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
854 break;
855 case GetHubDescriptor:
856 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
857 buf);
858 break;
859 case GetHubStatus:
860 /* no hub-wide feature/status flags */
861 memset (buf, 0, 4);
862 //cpu_to_le32s ((u32 *) buf);
863 break;
864 case GetPortStatus:
865 if (!wIndex || wIndex > ports)
866 goto error;
867 wIndex--;
868 status = 0;
869 temp = ehci_readl(ehci, status_reg);
870
871 // wPortChange bits
872 if (temp & PORT_CSC)
873 status |= USB_PORT_STAT_C_CONNECTION << 16;
874 if (temp & PORT_PEC)
875 status |= USB_PORT_STAT_C_ENABLE << 16;
876
877 if ((temp & PORT_OCC) && (!ignore_oc && !ehci->spurious_oc)){
878 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
879
880 /*
881 * Hubs should disable port power on over-current.
882 * However, not all EHCI implementations do this
883 * automatically, even if they _do_ support per-port
884 * power switching; they're allowed to just limit the
885 * current. hub_wq will turn the power back on.
886 */
887 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
888 && HCS_PPC(ehci->hcs_params)) {
889 spin_unlock_irqrestore(&ehci->lock, flags);
890 ehci_port_power(ehci, wIndex, false);
891 spin_lock_irqsave(&ehci->lock, flags);
892 temp = ehci_readl(ehci, status_reg);
893 }
894 }
895
896 /* no reset or resume pending */
897 if (!ehci->reset_done[wIndex]) {
898
899 /* Remote Wakeup received? */
900 if (temp & PORT_RESUME) {
901 /* resume signaling for 20 msec */
902 ehci->reset_done[wIndex] = jiffies
903 + msecs_to_jiffies(20);
904 usb_hcd_start_port_resume(&hcd->self, wIndex);
905 set_bit(wIndex, &ehci->resuming_ports);
906 /* check the port again */
907 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
908 ehci->reset_done[wIndex]);
909 }
910
911 /* reset or resume not yet complete */
912 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
913 ; /* wait until it is complete */
914
915 /* resume completed */
916 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
917 clear_bit(wIndex, &ehci->suspended_ports);
918 set_bit(wIndex, &ehci->port_c_suspend);
919 ehci->reset_done[wIndex] = 0;
920 usb_hcd_end_port_resume(&hcd->self, wIndex);
921
922 /* stop resume signaling */
923 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
924 ehci_writel(ehci, temp, status_reg);
925 clear_bit(wIndex, &ehci->resuming_ports);
926 retval = ehci_handshake(ehci, status_reg,
927 PORT_RESUME, 0, 2000 /* 2msec */);
928 if (retval != 0) {
929 ehci_err(ehci, "port %d resume error %d\n",
930 wIndex + 1, retval);
931 goto error;
932 }
933 temp = ehci_readl(ehci, status_reg);
934
935 /* whoever resets must GetPortStatus to complete it!! */
936 } else {
937 status |= USB_PORT_STAT_C_RESET << 16;
938 ehci->reset_done [wIndex] = 0;
939
940 /* force reset to complete */
941 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
942 status_reg);
943 /* REVISIT: some hardware needs 550+ usec to clear
944 * this bit; seems too long to spin routinely...
945 */
946 retval = ehci_handshake(ehci, status_reg,
947 PORT_RESET, 0, 1000);
948 if (retval != 0) {
949 ehci_err (ehci, "port %d reset error %d\n",
950 wIndex + 1, retval);
951 goto error;
952 }
953
954 /* see what we found out */
955 temp = check_reset_complete (ehci, wIndex, status_reg,
956 ehci_readl(ehci, status_reg));
957 }
958
959 /* transfer dedicated ports to the companion hc */
960 if ((temp & PORT_CONNECT) &&
961 test_bit(wIndex, &ehci->companion_ports)) {
962 temp &= ~PORT_RWC_BITS;
963 temp |= PORT_OWNER;
964 ehci_writel(ehci, temp, status_reg);
965 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
966 temp = ehci_readl(ehci, status_reg);
967 }
968
969 /*
970 * Even if OWNER is set, there's no harm letting hub_wq
971 * see the wPortStatus values (they should all be 0 except
972 * for PORT_POWER anyway).
973 */
974
975 if (temp & PORT_CONNECT) {
976 status |= USB_PORT_STAT_CONNECTION;
977 // status may be from integrated TT
978 if (ehci->has_hostpc) {
979 temp1 = ehci_readl(ehci, hostpc_reg);
980 status |= ehci_port_speed(ehci, temp1);
981 } else
982 status |= ehci_port_speed(ehci, temp);
983 }
984 if (temp & PORT_PE)
985 status |= USB_PORT_STAT_ENABLE;
986
987 /* maybe the port was unsuspended without our knowledge */
988 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
989 status |= USB_PORT_STAT_SUSPEND;
990 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
991 clear_bit(wIndex, &ehci->suspended_ports);
992 clear_bit(wIndex, &ehci->resuming_ports);
993 ehci->reset_done[wIndex] = 0;
994 if (temp & PORT_PE)
995 set_bit(wIndex, &ehci->port_c_suspend);
996 usb_hcd_end_port_resume(&hcd->self, wIndex);
997 }
998
999 if (temp & PORT_OC)
1000 status |= USB_PORT_STAT_OVERCURRENT;
1001 if (temp & PORT_RESET)
1002 status |= USB_PORT_STAT_RESET;
1003 if (temp & PORT_POWER)
1004 status |= USB_PORT_STAT_POWER;
1005 if (test_bit(wIndex, &ehci->port_c_suspend))
1006 status |= USB_PORT_STAT_C_SUSPEND << 16;
1007
1008 if (status & ~0xffff) /* only if wPortChange is interesting */
1009 dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1010 put_unaligned_le32(status, buf);
1011 break;
1012 case SetHubFeature:
1013 switch (wValue) {
1014 case C_HUB_LOCAL_POWER:
1015 case C_HUB_OVER_CURRENT:
1016 /* no hub-wide feature/status flags */
1017 break;
1018 default:
1019 goto error;
1020 }
1021 break;
1022 case SetPortFeature:
1023 selector = wIndex >> 8;
1024 wIndex &= 0xff;
1025 if (unlikely(ehci->debug)) {
1026 /* If the debug port is active any port
1027 * feature requests should get denied */
1028 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1029 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1030 retval = -ENODEV;
1031 goto error_exit;
1032 }
1033 }
1034 if (!wIndex || wIndex > ports)
1035 goto error;
1036 wIndex--;
1037 temp = ehci_readl(ehci, status_reg);
1038 if (temp & PORT_OWNER)
1039 break;
1040
1041 temp &= ~PORT_RWC_BITS;
1042 switch (wValue) {
1043 case USB_PORT_FEAT_SUSPEND:
1044 if (ehci->no_selective_suspend)
1045 break;
1046 if ((temp & PORT_PE) == 0
1047 || (temp & PORT_RESET) != 0)
1048 goto error;
1049
1050 /* After above check the port must be connected.
1051 * Set appropriate bit thus could put phy into low power
1052 * mode if we have tdi_phy_lpm feature
1053 */
1054 temp &= ~PORT_WKCONN_E;
1055 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1056 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1057 if (ehci->has_tdi_phy_lpm) {
1058 spin_unlock_irqrestore(&ehci->lock, flags);
1059 msleep(5);/* 5ms for HCD enter low pwr mode */
1060 spin_lock_irqsave(&ehci->lock, flags);
1061 temp1 = ehci_readl(ehci, hostpc_reg);
1062 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1063 hostpc_reg);
1064 temp1 = ehci_readl(ehci, hostpc_reg);
1065 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1066 wIndex, (temp1 & HOSTPC_PHCD) ?
1067 "succeeded" : "failed");
1068 }
1069 if (ehci_has_fsl_susp_errata(ehci)) {
1070 /* 10ms for HCD enter suspend */
1071 spin_unlock_irqrestore(&ehci->lock, flags);
1072 usleep_range(10000, 20000);
1073 spin_lock_irqsave(&ehci->lock, flags);
1074 }
1075 set_bit(wIndex, &ehci->suspended_ports);
1076 break;
1077 case USB_PORT_FEAT_POWER:
1078 if (HCS_PPC(ehci->hcs_params)) {
1079 spin_unlock_irqrestore(&ehci->lock, flags);
1080 ehci_port_power(ehci, wIndex, true);
1081 spin_lock_irqsave(&ehci->lock, flags);
1082 }
1083 break;
1084 case USB_PORT_FEAT_RESET:
1085 if (temp & (PORT_SUSPEND|PORT_RESUME))
1086 goto error;
1087 /* line status bits may report this as low speed,
1088 * which can be fine if this root hub has a
1089 * transaction translator built in.
1090 */
1091 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1092 && !ehci_is_TDI(ehci)
1093 && PORT_USB11 (temp)) {
1094 ehci_dbg (ehci,
1095 "port %d low speed --> companion\n",
1096 wIndex + 1);
1097 temp |= PORT_OWNER;
1098 } else {
1099 temp |= PORT_RESET;
1100 temp &= ~PORT_PE;
1101
1102 /*
1103 * caller must wait, then call GetPortStatus
1104 * usb 2.0 spec says 50 ms resets on root
1105 */
1106 ehci->reset_done [wIndex] = jiffies
1107 + msecs_to_jiffies (50);
1108
1109 /*
1110 * Force full-speed connect for FSL high-speed
1111 * erratum; disable HS Chirp by setting PFSC bit
1112 */
1113 if (ehci_has_fsl_hs_errata(ehci))
1114 temp |= (1 << PORTSC_FSL_PFSC);
1115 }
1116 ehci_writel(ehci, temp, status_reg);
1117 break;
1118
1119 /* For downstream facing ports (these): one hub port is put
1120 * into test mode according to USB2 11.24.2.13, then the hub
1121 * must be reset (which for root hub now means rmmod+modprobe,
1122 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1123 * about the EHCI-specific stuff.
1124 */
1125 case USB_PORT_FEAT_TEST:
1126#ifdef CONFIG_USB_HCD_TEST_MODE
1127 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1128 spin_unlock_irqrestore(&ehci->lock, flags);
1129 retval = ehset_single_step_set_feature(hcd,
1130 wIndex + 1);
1131 spin_lock_irqsave(&ehci->lock, flags);
1132 break;
1133 }
1134#endif
1135 if (!selector || selector > 5)
1136 goto error;
1137 spin_unlock_irqrestore(&ehci->lock, flags);
1138 ehci_quiesce(ehci);
1139 spin_lock_irqsave(&ehci->lock, flags);
1140
1141 /* Put all enabled ports into suspend */
1142 while (ports--) {
1143 u32 __iomem *sreg =
1144 &ehci->regs->port_status[ports];
1145
1146 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1147 if (temp & PORT_PE)
1148 ehci_writel(ehci, temp | PORT_SUSPEND,
1149 sreg);
1150 }
1151
1152 spin_unlock_irqrestore(&ehci->lock, flags);
1153 ehci_halt(ehci);
1154 spin_lock_irqsave(&ehci->lock, flags);
1155
1156 temp = ehci_readl(ehci, status_reg);
1157 temp |= selector << 16;
1158 ehci_writel(ehci, temp, status_reg);
1159 break;
1160
1161 default:
1162 goto error;
1163 }
1164 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1165 break;
1166
1167 default:
1168error:
1169 /* "stall" on error */
1170 retval = -EPIPE;
1171 }
1172error_exit:
1173 spin_unlock_irqrestore (&ehci->lock, flags);
1174 return retval;
1175}
1176EXPORT_SYMBOL_GPL(ehci_hub_control);
1177
1178static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1179{
1180 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1181
1182 if (ehci_is_TDI(ehci))
1183 return;
1184 set_owner(ehci, --portnum, PORT_OWNER);
1185}
1186
1187static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1188{
1189 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1190 u32 __iomem *reg;
1191
1192 if (ehci_is_TDI(ehci))
1193 return 0;
1194 reg = &ehci->regs->port_status[portnum - 1];
1195 return ehci_readl(ehci, reg) & PORT_OWNER;
1196}
1197
1198static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable)
1199{
1200 struct usb_hcd *hcd = ehci_to_hcd(ehci);
1201 u32 __iomem *status_reg = &ehci->regs->port_status[portnum];
1202 u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
1203
1204 if (enable)
1205 ehci_writel(ehci, temp | PORT_POWER, status_reg);
1206 else
1207 ehci_writel(ehci, temp & ~PORT_POWER, status_reg);
1208
1209 if (hcd->driver->port_power)
1210 hcd->driver->port_power(hcd, portnum, enable);
1211
1212 return 0;
1213}