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