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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/*
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}