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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 __maybe_unused 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 if (ehci->resuming_ports) {
227 spin_unlock_irq(&ehci->lock);
228 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
229 return -EBUSY;
230 }
231 }
232
233 /* stop schedules, clean any completed work */
234 if (ehci->rh_state == EHCI_RH_RUNNING)
235 ehci_quiesce (ehci);
236 ehci_work(ehci);
237
238 /* Unlike other USB host controller types, EHCI doesn't have
239 * any notion of "global" or bus-wide suspend. The driver has
240 * to manually suspend all the active unsuspended ports, and
241 * then manually resume them in the bus_resume() routine.
242 */
243 ehci->bus_suspended = 0;
244 ehci->owned_ports = 0;
245 changed = 0;
246 port = HCS_N_PORTS(ehci->hcs_params);
247 while (port--) {
248 u32 __iomem *reg = &ehci->regs->port_status [port];
249 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
250 u32 t2 = t1 & ~PORT_WAKE_BITS;
251
252 /* keep track of which ports we suspend */
253 if (t1 & PORT_OWNER)
254 set_bit(port, &ehci->owned_ports);
255 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
256 t2 |= PORT_SUSPEND;
257 set_bit(port, &ehci->bus_suspended);
258 }
259
260 /* enable remote wakeup on all ports, if told to do so */
261 if (hcd->self.root_hub->do_remote_wakeup) {
262 /* only enable appropriate wake bits, otherwise the
263 * hardware can not go phy low power mode. If a race
264 * condition happens here(connection change during bits
265 * set), the port change detection will finally fix it.
266 */
267 if (t1 & PORT_CONNECT)
268 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
269 else
270 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
271 }
272
273 if (t1 != t2) {
274 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
275 port + 1, t1, t2);
276 ehci_writel(ehci, t2, reg);
277 changed = 1;
278 }
279 }
280
281 if (changed && ehci->has_hostpc) {
282 spin_unlock_irq(&ehci->lock);
283 msleep(5); /* 5 ms for HCD to enter low-power mode */
284 spin_lock_irq(&ehci->lock);
285
286 port = HCS_N_PORTS(ehci->hcs_params);
287 while (port--) {
288 u32 __iomem *hostpc_reg;
289 u32 t3;
290
291 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
292 + HOSTPC0 + 4 * port);
293 t3 = ehci_readl(ehci, hostpc_reg);
294 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
295 t3 = ehci_readl(ehci, hostpc_reg);
296 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
297 port, (t3 & HOSTPC_PHCD) ?
298 "succeeded" : "failed");
299 }
300 }
301
302 /* Apparently some devices need a >= 1-uframe delay here */
303 if (ehci->bus_suspended)
304 udelay(150);
305
306 /* turn off now-idle HC */
307 ehci_halt (ehci);
308 ehci->rh_state = EHCI_RH_SUSPENDED;
309
310 if (ehci->reclaim)
311 end_unlink_async(ehci);
312
313 /* allow remote wakeup */
314 mask = INTR_MASK;
315 if (!hcd->self.root_hub->do_remote_wakeup)
316 mask &= ~STS_PCD;
317 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
318 ehci_readl(ehci, &ehci->regs->intr_enable);
319
320 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
321 spin_unlock_irq (&ehci->lock);
322
323 /* ehci_work() may have re-enabled the watchdog timer, which we do not
324 * want, and so we must delete any pending watchdog timer events.
325 */
326 del_timer_sync(&ehci->watchdog);
327 return 0;
328}
329
330
331/* caller has locked the root hub, and should reset/reinit on error */
332static int ehci_bus_resume (struct usb_hcd *hcd)
333{
334 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
335 u32 temp;
336 u32 power_okay;
337 int i;
338 unsigned long resume_needed = 0;
339
340 if (time_before (jiffies, ehci->next_statechange))
341 msleep(5);
342 spin_lock_irq (&ehci->lock);
343 if (!HCD_HW_ACCESSIBLE(hcd)) {
344 spin_unlock_irq(&ehci->lock);
345 return -ESHUTDOWN;
346 }
347
348 if (unlikely(ehci->debug)) {
349 if (!dbgp_reset_prep())
350 ehci->debug = NULL;
351 else
352 dbgp_external_startup();
353 }
354
355 /* Ideally and we've got a real resume here, and no port's power
356 * was lost. (For PCI, that means Vaux was maintained.) But we
357 * could instead be restoring a swsusp snapshot -- so that BIOS was
358 * the last user of the controller, not reset/pm hardware keeping
359 * state we gave to it.
360 */
361 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
362 ehci_dbg(ehci, "resume root hub%s\n",
363 power_okay ? "" : " after power loss");
364
365 /* at least some APM implementations will try to deliver
366 * IRQs right away, so delay them until we're ready.
367 */
368 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
369
370 /* re-init operational registers */
371 ehci_writel(ehci, 0, &ehci->regs->segment);
372 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
373 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
374
375 /* restore CMD_RUN, framelist size, and irq threshold */
376 ehci->command |= CMD_RUN;
377 ehci_writel(ehci, ehci->command, &ehci->regs->command);
378 ehci->rh_state = EHCI_RH_RUNNING;
379
380 /* Some controller/firmware combinations need a delay during which
381 * they set up the port statuses. See Bugzilla #8190. */
382 spin_unlock_irq(&ehci->lock);
383 msleep(8);
384 spin_lock_irq(&ehci->lock);
385
386 /* clear phy low-power mode before resume */
387 if (ehci->bus_suspended && ehci->has_hostpc) {
388 i = HCS_N_PORTS(ehci->hcs_params);
389 while (i--) {
390 if (test_bit(i, &ehci->bus_suspended)) {
391 u32 __iomem *hostpc_reg;
392
393 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
394 + HOSTPC0 + 4 * i);
395 temp = ehci_readl(ehci, hostpc_reg);
396 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
397 hostpc_reg);
398 }
399 }
400 spin_unlock_irq(&ehci->lock);
401 msleep(5);
402 spin_lock_irq(&ehci->lock);
403 }
404
405 /* manually resume the ports we suspended during bus_suspend() */
406 i = HCS_N_PORTS (ehci->hcs_params);
407 while (i--) {
408 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
409 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
410 if (test_bit(i, &ehci->bus_suspended) &&
411 (temp & PORT_SUSPEND)) {
412 temp |= PORT_RESUME;
413 set_bit(i, &resume_needed);
414 }
415 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
416 }
417
418 /* msleep for 20ms only if code is trying to resume port */
419 if (resume_needed) {
420 spin_unlock_irq(&ehci->lock);
421 msleep(20);
422 spin_lock_irq(&ehci->lock);
423 }
424
425 i = HCS_N_PORTS (ehci->hcs_params);
426 while (i--) {
427 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
428 if (test_bit(i, &resume_needed)) {
429 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
430 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
431 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
432 }
433 }
434 (void) ehci_readl(ehci, &ehci->regs->command);
435
436 /* maybe re-activate the schedule(s) */
437 temp = 0;
438 if (ehci->async->qh_next.qh)
439 temp |= CMD_ASE;
440 if (ehci->periodic_sched)
441 temp |= CMD_PSE;
442 if (temp) {
443 ehci->command |= temp;
444 ehci_writel(ehci, ehci->command, &ehci->regs->command);
445 }
446
447 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
448
449 /* Now we can safely re-enable irqs */
450 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
451
452 spin_unlock_irq (&ehci->lock);
453 ehci_handover_companion_ports(ehci);
454 return 0;
455}
456
457#else
458
459#define ehci_bus_suspend NULL
460#define ehci_bus_resume NULL
461
462#endif /* CONFIG_PM */
463
464/*-------------------------------------------------------------------------*/
465
466/*
467 * Sets the owner of a port
468 */
469static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
470{
471 u32 __iomem *status_reg;
472 u32 port_status;
473 int try;
474
475 status_reg = &ehci->regs->port_status[portnum];
476
477 /*
478 * The controller won't set the OWNER bit if the port is
479 * enabled, so this loop will sometimes require at least two
480 * iterations: one to disable the port and one to set OWNER.
481 */
482 for (try = 4; try > 0; --try) {
483 spin_lock_irq(&ehci->lock);
484 port_status = ehci_readl(ehci, status_reg);
485 if ((port_status & PORT_OWNER) == new_owner
486 || (port_status & (PORT_OWNER | PORT_CONNECT))
487 == 0)
488 try = 0;
489 else {
490 port_status ^= PORT_OWNER;
491 port_status &= ~(PORT_PE | PORT_RWC_BITS);
492 ehci_writel(ehci, port_status, status_reg);
493 }
494 spin_unlock_irq(&ehci->lock);
495 if (try > 1)
496 msleep(5);
497 }
498}
499
500/*-------------------------------------------------------------------------*/
501
502static int check_reset_complete (
503 struct ehci_hcd *ehci,
504 int index,
505 u32 __iomem *status_reg,
506 int port_status
507) {
508 if (!(port_status & PORT_CONNECT))
509 return port_status;
510
511 /* if reset finished and it's still not enabled -- handoff */
512 if (!(port_status & PORT_PE)) {
513
514 /* with integrated TT, there's nobody to hand it to! */
515 if (ehci_is_TDI(ehci)) {
516 ehci_dbg (ehci,
517 "Failed to enable port %d on root hub TT\n",
518 index+1);
519 return port_status;
520 }
521
522 ehci_dbg (ehci, "port %d full speed --> companion\n",
523 index + 1);
524
525 // what happens if HCS_N_CC(params) == 0 ?
526 port_status |= PORT_OWNER;
527 port_status &= ~PORT_RWC_BITS;
528 ehci_writel(ehci, port_status, status_reg);
529
530 /* ensure 440EPX ohci controller state is operational */
531 if (ehci->has_amcc_usb23)
532 set_ohci_hcfs(ehci, 1);
533 } else {
534 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
535 index + 1);
536 /* ensure 440EPx ohci controller state is suspended */
537 if (ehci->has_amcc_usb23)
538 set_ohci_hcfs(ehci, 0);
539 }
540
541 return port_status;
542}
543
544/*-------------------------------------------------------------------------*/
545
546
547/* build "status change" packet (one or two bytes) from HC registers */
548
549static int
550ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
551{
552 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
553 u32 temp, status;
554 u32 mask;
555 int ports, i, retval = 1;
556 unsigned long flags;
557 u32 ppcd = 0;
558
559 /* init status to no-changes */
560 buf [0] = 0;
561 ports = HCS_N_PORTS (ehci->hcs_params);
562 if (ports > 7) {
563 buf [1] = 0;
564 retval++;
565 }
566
567 /* Inform the core about resumes-in-progress by returning
568 * a non-zero value even if there are no status changes.
569 */
570 status = ehci->resuming_ports;
571
572 /* Some boards (mostly VIA?) report bogus overcurrent indications,
573 * causing massive log spam unless we completely ignore them. It
574 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
575 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
576 * PORT_POWER; that's surprising, but maybe within-spec.
577 */
578 if (!ignore_oc)
579 mask = PORT_CSC | PORT_PEC | PORT_OCC;
580 else
581 mask = PORT_CSC | PORT_PEC;
582 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
583
584 /* no hub change reports (bit 0) for now (power, ...) */
585
586 /* port N changes (bit N)? */
587 spin_lock_irqsave (&ehci->lock, flags);
588
589 /* get per-port change detect bits */
590 if (ehci->has_ppcd)
591 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
592
593 for (i = 0; i < ports; i++) {
594 /* leverage per-port change bits feature */
595 if (ehci->has_ppcd && !(ppcd & (1 << i)))
596 continue;
597 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
598
599 /*
600 * Return status information even for ports with OWNER set.
601 * Otherwise khubd wouldn't see the disconnect event when a
602 * high-speed device is switched over to the companion
603 * controller by the user.
604 */
605
606 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
607 || (ehci->reset_done[i] && time_after_eq(
608 jiffies, ehci->reset_done[i]))) {
609 if (i < 7)
610 buf [0] |= 1 << (i + 1);
611 else
612 buf [1] |= 1 << (i - 7);
613 status = STS_PCD;
614 }
615 }
616 /* FIXME autosuspend idle root hubs */
617 spin_unlock_irqrestore (&ehci->lock, flags);
618 return status ? retval : 0;
619}
620
621/*-------------------------------------------------------------------------*/
622
623static void
624ehci_hub_descriptor (
625 struct ehci_hcd *ehci,
626 struct usb_hub_descriptor *desc
627) {
628 int ports = HCS_N_PORTS (ehci->hcs_params);
629 u16 temp;
630
631 desc->bDescriptorType = 0x29;
632 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
633 desc->bHubContrCurrent = 0;
634
635 desc->bNbrPorts = ports;
636 temp = 1 + (ports / 8);
637 desc->bDescLength = 7 + 2 * temp;
638
639 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
640 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
641 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
642
643 temp = 0x0008; /* per-port overcurrent reporting */
644 if (HCS_PPC (ehci->hcs_params))
645 temp |= 0x0001; /* per-port power control */
646 else
647 temp |= 0x0002; /* no power switching */
648#if 0
649// re-enable when we support USB_PORT_FEAT_INDICATOR below.
650 if (HCS_INDICATOR (ehci->hcs_params))
651 temp |= 0x0080; /* per-port indicators (LEDs) */
652#endif
653 desc->wHubCharacteristics = cpu_to_le16(temp);
654}
655
656/*-------------------------------------------------------------------------*/
657
658static int ehci_hub_control (
659 struct usb_hcd *hcd,
660 u16 typeReq,
661 u16 wValue,
662 u16 wIndex,
663 char *buf,
664 u16 wLength
665) {
666 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
667 int ports = HCS_N_PORTS (ehci->hcs_params);
668 u32 __iomem *status_reg = &ehci->regs->port_status[
669 (wIndex & 0xff) - 1];
670 u32 __iomem *hostpc_reg = NULL;
671 u32 temp, temp1, status;
672 unsigned long flags;
673 int retval = 0;
674 unsigned selector;
675
676 /*
677 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
678 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
679 * (track current state ourselves) ... blink for diagnostics,
680 * power, "this is the one", etc. EHCI spec supports this.
681 */
682
683 if (ehci->has_hostpc)
684 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
685 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
686 spin_lock_irqsave (&ehci->lock, flags);
687 switch (typeReq) {
688 case ClearHubFeature:
689 switch (wValue) {
690 case C_HUB_LOCAL_POWER:
691 case C_HUB_OVER_CURRENT:
692 /* no hub-wide feature/status flags */
693 break;
694 default:
695 goto error;
696 }
697 break;
698 case ClearPortFeature:
699 if (!wIndex || wIndex > ports)
700 goto error;
701 wIndex--;
702 temp = ehci_readl(ehci, status_reg);
703 temp &= ~PORT_RWC_BITS;
704
705 /*
706 * Even if OWNER is set, so the port is owned by the
707 * companion controller, khubd needs to be able to clear
708 * the port-change status bits (especially
709 * USB_PORT_STAT_C_CONNECTION).
710 */
711
712 switch (wValue) {
713 case USB_PORT_FEAT_ENABLE:
714 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
715 break;
716 case USB_PORT_FEAT_C_ENABLE:
717 ehci_writel(ehci, temp | PORT_PEC, status_reg);
718 break;
719 case USB_PORT_FEAT_SUSPEND:
720 if (temp & PORT_RESET)
721 goto error;
722 if (ehci->no_selective_suspend)
723 break;
724#ifdef CONFIG_USB_OTG
725 if ((hcd->self.otg_port == (wIndex + 1))
726 && hcd->self.b_hnp_enable) {
727 otg_start_hnp(ehci->transceiver->otg);
728 break;
729 }
730#endif
731 if (!(temp & PORT_SUSPEND))
732 break;
733 if ((temp & PORT_PE) == 0)
734 goto error;
735
736 /* clear phy low-power mode before resume */
737 if (hostpc_reg) {
738 temp1 = ehci_readl(ehci, hostpc_reg);
739 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
740 hostpc_reg);
741 spin_unlock_irqrestore(&ehci->lock, flags);
742 msleep(5);/* wait to leave low-power mode */
743 spin_lock_irqsave(&ehci->lock, flags);
744 }
745 /* resume signaling for 20 msec */
746 temp &= ~PORT_WAKE_BITS;
747 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
748 ehci->reset_done[wIndex] = jiffies
749 + msecs_to_jiffies(20);
750 break;
751 case USB_PORT_FEAT_C_SUSPEND:
752 clear_bit(wIndex, &ehci->port_c_suspend);
753 break;
754 case USB_PORT_FEAT_POWER:
755 if (HCS_PPC (ehci->hcs_params))
756 ehci_writel(ehci, temp & ~PORT_POWER,
757 status_reg);
758 break;
759 case USB_PORT_FEAT_C_CONNECTION:
760 if (ehci->has_lpm) {
761 /* clear PORTSC bits on disconnect */
762 temp &= ~PORT_LPM;
763 temp &= ~PORT_DEV_ADDR;
764 }
765 ehci_writel(ehci, temp | PORT_CSC, status_reg);
766 break;
767 case USB_PORT_FEAT_C_OVER_CURRENT:
768 ehci_writel(ehci, temp | PORT_OCC, status_reg);
769 break;
770 case USB_PORT_FEAT_C_RESET:
771 /* GetPortStatus clears reset */
772 break;
773 default:
774 goto error;
775 }
776 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
777 break;
778 case GetHubDescriptor:
779 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
780 buf);
781 break;
782 case GetHubStatus:
783 /* no hub-wide feature/status flags */
784 memset (buf, 0, 4);
785 //cpu_to_le32s ((u32 *) buf);
786 break;
787 case GetPortStatus:
788 if (!wIndex || wIndex > ports)
789 goto error;
790 wIndex--;
791 status = 0;
792 temp = ehci_readl(ehci, status_reg);
793
794 // wPortChange bits
795 if (temp & PORT_CSC)
796 status |= USB_PORT_STAT_C_CONNECTION << 16;
797 if (temp & PORT_PEC)
798 status |= USB_PORT_STAT_C_ENABLE << 16;
799
800 if ((temp & PORT_OCC) && !ignore_oc){
801 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
802
803 /*
804 * Hubs should disable port power on over-current.
805 * However, not all EHCI implementations do this
806 * automatically, even if they _do_ support per-port
807 * power switching; they're allowed to just limit the
808 * current. khubd will turn the power back on.
809 */
810 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
811 ehci_writel(ehci,
812 temp & ~(PORT_RWC_BITS | PORT_POWER),
813 status_reg);
814 temp = ehci_readl(ehci, status_reg);
815 }
816 }
817
818 /* whoever resumes must GetPortStatus to complete it!! */
819 if (temp & PORT_RESUME) {
820
821 /* Remote Wakeup received? */
822 if (!ehci->reset_done[wIndex]) {
823 /* resume signaling for 20 msec */
824 ehci->reset_done[wIndex] = jiffies
825 + msecs_to_jiffies(20);
826 /* check the port again */
827 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
828 ehci->reset_done[wIndex]);
829 }
830
831 /* resume completed? */
832 else if (time_after_eq(jiffies,
833 ehci->reset_done[wIndex])) {
834 clear_bit(wIndex, &ehci->suspended_ports);
835 set_bit(wIndex, &ehci->port_c_suspend);
836 ehci->reset_done[wIndex] = 0;
837
838 /* stop resume signaling */
839 temp = ehci_readl(ehci, status_reg);
840 ehci_writel(ehci,
841 temp & ~(PORT_RWC_BITS | PORT_RESUME),
842 status_reg);
843 clear_bit(wIndex, &ehci->resuming_ports);
844 retval = handshake(ehci, status_reg,
845 PORT_RESUME, 0, 2000 /* 2msec */);
846 if (retval != 0) {
847 ehci_err(ehci,
848 "port %d resume error %d\n",
849 wIndex + 1, retval);
850 goto error;
851 }
852 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
853 }
854 }
855
856 /* whoever resets must GetPortStatus to complete it!! */
857 if ((temp & PORT_RESET)
858 && time_after_eq(jiffies,
859 ehci->reset_done[wIndex])) {
860 status |= USB_PORT_STAT_C_RESET << 16;
861 ehci->reset_done [wIndex] = 0;
862 clear_bit(wIndex, &ehci->resuming_ports);
863
864 /* force reset to complete */
865 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
866 status_reg);
867 /* REVISIT: some hardware needs 550+ usec to clear
868 * this bit; seems too long to spin routinely...
869 */
870 retval = handshake(ehci, status_reg,
871 PORT_RESET, 0, 1000);
872 if (retval != 0) {
873 ehci_err (ehci, "port %d reset error %d\n",
874 wIndex + 1, retval);
875 goto error;
876 }
877
878 /* see what we found out */
879 temp = check_reset_complete (ehci, wIndex, status_reg,
880 ehci_readl(ehci, status_reg));
881 }
882
883 if (!(temp & (PORT_RESUME|PORT_RESET))) {
884 ehci->reset_done[wIndex] = 0;
885 clear_bit(wIndex, &ehci->resuming_ports);
886 }
887
888 /* transfer dedicated ports to the companion hc */
889 if ((temp & PORT_CONNECT) &&
890 test_bit(wIndex, &ehci->companion_ports)) {
891 temp &= ~PORT_RWC_BITS;
892 temp |= PORT_OWNER;
893 ehci_writel(ehci, temp, status_reg);
894 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
895 temp = ehci_readl(ehci, status_reg);
896 }
897
898 /*
899 * Even if OWNER is set, there's no harm letting khubd
900 * see the wPortStatus values (they should all be 0 except
901 * for PORT_POWER anyway).
902 */
903
904 if (temp & PORT_CONNECT) {
905 status |= USB_PORT_STAT_CONNECTION;
906 // status may be from integrated TT
907 if (ehci->has_hostpc) {
908 temp1 = ehci_readl(ehci, hostpc_reg);
909 status |= ehci_port_speed(ehci, temp1);
910 } else
911 status |= ehci_port_speed(ehci, temp);
912 }
913 if (temp & PORT_PE)
914 status |= USB_PORT_STAT_ENABLE;
915
916 /* maybe the port was unsuspended without our knowledge */
917 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
918 status |= USB_PORT_STAT_SUSPEND;
919 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
920 clear_bit(wIndex, &ehci->suspended_ports);
921 clear_bit(wIndex, &ehci->resuming_ports);
922 ehci->reset_done[wIndex] = 0;
923 if (temp & PORT_PE)
924 set_bit(wIndex, &ehci->port_c_suspend);
925 }
926
927 if (temp & PORT_OC)
928 status |= USB_PORT_STAT_OVERCURRENT;
929 if (temp & PORT_RESET)
930 status |= USB_PORT_STAT_RESET;
931 if (temp & PORT_POWER)
932 status |= USB_PORT_STAT_POWER;
933 if (test_bit(wIndex, &ehci->port_c_suspend))
934 status |= USB_PORT_STAT_C_SUSPEND << 16;
935
936#ifndef VERBOSE_DEBUG
937 if (status & ~0xffff) /* only if wPortChange is interesting */
938#endif
939 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
940 put_unaligned_le32(status, buf);
941 break;
942 case SetHubFeature:
943 switch (wValue) {
944 case C_HUB_LOCAL_POWER:
945 case C_HUB_OVER_CURRENT:
946 /* no hub-wide feature/status flags */
947 break;
948 default:
949 goto error;
950 }
951 break;
952 case SetPortFeature:
953 selector = wIndex >> 8;
954 wIndex &= 0xff;
955 if (unlikely(ehci->debug)) {
956 /* If the debug port is active any port
957 * feature requests should get denied */
958 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
959 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
960 retval = -ENODEV;
961 goto error_exit;
962 }
963 }
964 if (!wIndex || wIndex > ports)
965 goto error;
966 wIndex--;
967 temp = ehci_readl(ehci, status_reg);
968 if (temp & PORT_OWNER)
969 break;
970
971 temp &= ~PORT_RWC_BITS;
972 switch (wValue) {
973 case USB_PORT_FEAT_SUSPEND:
974 if (ehci->no_selective_suspend)
975 break;
976 if ((temp & PORT_PE) == 0
977 || (temp & PORT_RESET) != 0)
978 goto error;
979
980 /* After above check the port must be connected.
981 * Set appropriate bit thus could put phy into low power
982 * mode if we have hostpc feature
983 */
984 temp &= ~PORT_WKCONN_E;
985 temp |= PORT_WKDISC_E | PORT_WKOC_E;
986 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
987 if (hostpc_reg) {
988 spin_unlock_irqrestore(&ehci->lock, flags);
989 msleep(5);/* 5ms for HCD enter low pwr mode */
990 spin_lock_irqsave(&ehci->lock, flags);
991 temp1 = ehci_readl(ehci, hostpc_reg);
992 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
993 hostpc_reg);
994 temp1 = ehci_readl(ehci, hostpc_reg);
995 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
996 wIndex, (temp1 & HOSTPC_PHCD) ?
997 "succeeded" : "failed");
998 }
999 set_bit(wIndex, &ehci->suspended_ports);
1000 break;
1001 case USB_PORT_FEAT_POWER:
1002 if (HCS_PPC (ehci->hcs_params))
1003 ehci_writel(ehci, temp | PORT_POWER,
1004 status_reg);
1005 break;
1006 case USB_PORT_FEAT_RESET:
1007 if (temp & PORT_RESUME)
1008 goto error;
1009 /* line status bits may report this as low speed,
1010 * which can be fine if this root hub has a
1011 * transaction translator built in.
1012 */
1013 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1014 && !ehci_is_TDI(ehci)
1015 && PORT_USB11 (temp)) {
1016 ehci_dbg (ehci,
1017 "port %d low speed --> companion\n",
1018 wIndex + 1);
1019 temp |= PORT_OWNER;
1020 } else {
1021 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1022 temp |= PORT_RESET;
1023 temp &= ~PORT_PE;
1024
1025 /*
1026 * caller must wait, then call GetPortStatus
1027 * usb 2.0 spec says 50 ms resets on root
1028 */
1029 ehci->reset_done [wIndex] = jiffies
1030 + msecs_to_jiffies (50);
1031 }
1032 ehci_writel(ehci, temp, status_reg);
1033 break;
1034
1035 /* For downstream facing ports (these): one hub port is put
1036 * into test mode according to USB2 11.24.2.13, then the hub
1037 * must be reset (which for root hub now means rmmod+modprobe,
1038 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1039 * about the EHCI-specific stuff.
1040 */
1041 case USB_PORT_FEAT_TEST:
1042 if (!selector || selector > 5)
1043 goto error;
1044 ehci_quiesce(ehci);
1045
1046 /* Put all enabled ports into suspend */
1047 while (ports--) {
1048 u32 __iomem *sreg =
1049 &ehci->regs->port_status[ports];
1050
1051 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1052 if (temp & PORT_PE)
1053 ehci_writel(ehci, temp | PORT_SUSPEND,
1054 sreg);
1055 }
1056 ehci_halt(ehci);
1057 temp = ehci_readl(ehci, status_reg);
1058 temp |= selector << 16;
1059 ehci_writel(ehci, temp, status_reg);
1060 break;
1061
1062 default:
1063 goto error;
1064 }
1065 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1066 break;
1067
1068 default:
1069error:
1070 /* "stall" on error */
1071 retval = -EPIPE;
1072 }
1073error_exit:
1074 spin_unlock_irqrestore (&ehci->lock, flags);
1075 return retval;
1076}
1077
1078static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
1079 int portnum)
1080{
1081 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1082
1083 if (ehci_is_TDI(ehci))
1084 return;
1085 set_owner(ehci, --portnum, PORT_OWNER);
1086}
1087
1088static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
1089 int portnum)
1090{
1091 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1092 u32 __iomem *reg;
1093
1094 if (ehci_is_TDI(ehci))
1095 return 0;
1096 reg = &ehci->regs->port_status[portnum - 1];
1097 return ehci_readl(ehci, reg) & PORT_OWNER;
1098}
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}