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spi: Use dev_get_drvdata at appropriate places
[deliverable/linux.git] / drivers / usb / host / ehci-hub.c
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
36 static 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 static 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 */
54 static 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
148 static 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
169 static 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_hostpc) {
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_vdbg(ehci, "port %d, %08x -> %08x\n",
215 port + 1, t1, t2);
216 ehci_writel(ehci, t2, reg);
217 }
218
219 /* enter phy low-power mode again */
220 if (ehci->has_hostpc) {
221 port = HCS_N_PORTS(ehci->hcs_params);
222 while (port--) {
223 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
224
225 temp = ehci_readl(ehci, hostpc_reg);
226 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
227 }
228 }
229
230 /* Does the root hub have a port wakeup pending? */
231 if (!suspending && ehci_port_change(ehci))
232 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
233
234 spin_unlock_irq(&ehci->lock);
235 }
236
237 static int ehci_bus_suspend (struct usb_hcd *hcd)
238 {
239 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
240 int port;
241 int mask;
242 int changed;
243
244 ehci_dbg(ehci, "suspend root hub\n");
245
246 if (time_before (jiffies, ehci->next_statechange))
247 msleep(5);
248
249 /* stop the schedules */
250 ehci_quiesce(ehci);
251
252 spin_lock_irq (&ehci->lock);
253 if (ehci->rh_state < EHCI_RH_RUNNING)
254 goto done;
255
256 /* Once the controller is stopped, port resumes that are already
257 * in progress won't complete. Hence if remote wakeup is enabled
258 * for the root hub and any ports are in the middle of a resume or
259 * remote wakeup, we must fail the suspend.
260 */
261 if (hcd->self.root_hub->do_remote_wakeup) {
262 if (ehci->resuming_ports) {
263 spin_unlock_irq(&ehci->lock);
264 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
265 return -EBUSY;
266 }
267 }
268
269 /* Unlike other USB host controller types, EHCI doesn't have
270 * any notion of "global" or bus-wide suspend. The driver has
271 * to manually suspend all the active unsuspended ports, and
272 * then manually resume them in the bus_resume() routine.
273 */
274 ehci->bus_suspended = 0;
275 ehci->owned_ports = 0;
276 changed = 0;
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 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
306 port + 1, t1, t2);
307 ehci_writel(ehci, t2, reg);
308 changed = 1;
309 }
310 }
311
312 if (changed && ehci->has_hostpc) {
313 spin_unlock_irq(&ehci->lock);
314 msleep(5); /* 5 ms for HCD to enter low-power mode */
315 spin_lock_irq(&ehci->lock);
316
317 port = HCS_N_PORTS(ehci->hcs_params);
318 while (port--) {
319 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
320 u32 t3;
321
322 t3 = ehci_readl(ehci, hostpc_reg);
323 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
324 t3 = ehci_readl(ehci, hostpc_reg);
325 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
326 port, (t3 & HOSTPC_PHCD) ?
327 "succeeded" : "failed");
328 }
329 }
330 spin_unlock_irq(&ehci->lock);
331
332 /* Apparently some devices need a >= 1-uframe delay here */
333 if (ehci->bus_suspended)
334 udelay(150);
335
336 /* turn off now-idle HC */
337 ehci_halt (ehci);
338
339 spin_lock_irq(&ehci->lock);
340 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
341 ehci_handle_controller_death(ehci);
342 if (ehci->rh_state != EHCI_RH_RUNNING)
343 goto done;
344 ehci->rh_state = EHCI_RH_SUSPENDED;
345
346 end_unlink_async(ehci);
347 unlink_empty_async_suspended(ehci);
348 ehci_handle_intr_unlinks(ehci);
349 end_free_itds(ehci);
350
351 /* allow remote wakeup */
352 mask = INTR_MASK;
353 if (!hcd->self.root_hub->do_remote_wakeup)
354 mask &= ~STS_PCD;
355 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
356 ehci_readl(ehci, &ehci->regs->intr_enable);
357
358 done:
359 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
360 ehci->enabled_hrtimer_events = 0;
361 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
362 spin_unlock_irq (&ehci->lock);
363
364 hrtimer_cancel(&ehci->hrtimer);
365 return 0;
366 }
367
368
369 /* caller has locked the root hub, and should reset/reinit on error */
370 static int ehci_bus_resume (struct usb_hcd *hcd)
371 {
372 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
373 u32 temp;
374 u32 power_okay;
375 int i;
376 unsigned long resume_needed = 0;
377
378 if (time_before (jiffies, ehci->next_statechange))
379 msleep(5);
380 spin_lock_irq (&ehci->lock);
381 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
382 goto shutdown;
383
384 if (unlikely(ehci->debug)) {
385 if (!dbgp_reset_prep(hcd))
386 ehci->debug = NULL;
387 else
388 dbgp_external_startup(hcd);
389 }
390
391 /* Ideally and we've got a real resume here, and no port's power
392 * was lost. (For PCI, that means Vaux was maintained.) But we
393 * could instead be restoring a swsusp snapshot -- so that BIOS was
394 * the last user of the controller, not reset/pm hardware keeping
395 * state we gave to it.
396 */
397 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
398 ehci_dbg(ehci, "resume root hub%s\n",
399 power_okay ? "" : " after power loss");
400
401 /* at least some APM implementations will try to deliver
402 * IRQs right away, so delay them until we're ready.
403 */
404 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
405
406 /* re-init operational registers */
407 ehci_writel(ehci, 0, &ehci->regs->segment);
408 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
409 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
410
411 /* restore CMD_RUN, framelist size, and irq threshold */
412 ehci->command |= CMD_RUN;
413 ehci_writel(ehci, ehci->command, &ehci->regs->command);
414 ehci->rh_state = EHCI_RH_RUNNING;
415
416 /*
417 * According to Bugzilla #8190, the port status for some controllers
418 * will be wrong without a delay. At their wrong status, the port
419 * is enabled, but not suspended neither resumed.
420 */
421 i = HCS_N_PORTS(ehci->hcs_params);
422 while (i--) {
423 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
424 if ((temp & PORT_PE) &&
425 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
426 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
427 spin_unlock_irq(&ehci->lock);
428 msleep(8);
429 spin_lock_irq(&ehci->lock);
430 break;
431 }
432 }
433
434 if (ehci->shutdown)
435 goto shutdown;
436
437 /* clear phy low-power mode before resume */
438 if (ehci->bus_suspended && ehci->has_hostpc) {
439 i = HCS_N_PORTS(ehci->hcs_params);
440 while (i--) {
441 if (test_bit(i, &ehci->bus_suspended)) {
442 u32 __iomem *hostpc_reg =
443 &ehci->regs->hostpc[i];
444
445 temp = ehci_readl(ehci, hostpc_reg);
446 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
447 hostpc_reg);
448 }
449 }
450 spin_unlock_irq(&ehci->lock);
451 msleep(5);
452 spin_lock_irq(&ehci->lock);
453 if (ehci->shutdown)
454 goto shutdown;
455 }
456
457 /* manually resume the ports we suspended during bus_suspend() */
458 i = HCS_N_PORTS (ehci->hcs_params);
459 while (i--) {
460 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
461 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
462 if (test_bit(i, &ehci->bus_suspended) &&
463 (temp & PORT_SUSPEND)) {
464 temp |= PORT_RESUME;
465 set_bit(i, &resume_needed);
466 }
467 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
468 }
469
470 /* msleep for 20ms only if code is trying to resume port */
471 if (resume_needed) {
472 spin_unlock_irq(&ehci->lock);
473 msleep(20);
474 spin_lock_irq(&ehci->lock);
475 if (ehci->shutdown)
476 goto shutdown;
477 }
478
479 i = HCS_N_PORTS (ehci->hcs_params);
480 while (i--) {
481 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
482 if (test_bit(i, &resume_needed)) {
483 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
484 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
485 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
486 }
487 }
488
489 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
490 spin_unlock_irq(&ehci->lock);
491
492 ehci_handover_companion_ports(ehci);
493
494 /* Now we can safely re-enable irqs */
495 spin_lock_irq(&ehci->lock);
496 if (ehci->shutdown)
497 goto shutdown;
498 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
499 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
500 spin_unlock_irq(&ehci->lock);
501
502 return 0;
503
504 shutdown:
505 spin_unlock_irq(&ehci->lock);
506 return -ESHUTDOWN;
507 }
508
509 #else
510
511 #define ehci_bus_suspend NULL
512 #define ehci_bus_resume NULL
513
514 #endif /* CONFIG_PM */
515
516 /*-------------------------------------------------------------------------*/
517
518 /*
519 * Sets the owner of a port
520 */
521 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
522 {
523 u32 __iomem *status_reg;
524 u32 port_status;
525 int try;
526
527 status_reg = &ehci->regs->port_status[portnum];
528
529 /*
530 * The controller won't set the OWNER bit if the port is
531 * enabled, so this loop will sometimes require at least two
532 * iterations: one to disable the port and one to set OWNER.
533 */
534 for (try = 4; try > 0; --try) {
535 spin_lock_irq(&ehci->lock);
536 port_status = ehci_readl(ehci, status_reg);
537 if ((port_status & PORT_OWNER) == new_owner
538 || (port_status & (PORT_OWNER | PORT_CONNECT))
539 == 0)
540 try = 0;
541 else {
542 port_status ^= PORT_OWNER;
543 port_status &= ~(PORT_PE | PORT_RWC_BITS);
544 ehci_writel(ehci, port_status, status_reg);
545 }
546 spin_unlock_irq(&ehci->lock);
547 if (try > 1)
548 msleep(5);
549 }
550 }
551
552 /*-------------------------------------------------------------------------*/
553
554 static int check_reset_complete (
555 struct ehci_hcd *ehci,
556 int index,
557 u32 __iomem *status_reg,
558 int port_status
559 ) {
560 if (!(port_status & PORT_CONNECT))
561 return port_status;
562
563 /* if reset finished and it's still not enabled -- handoff */
564 if (!(port_status & PORT_PE)) {
565
566 /* with integrated TT, there's nobody to hand it to! */
567 if (ehci_is_TDI(ehci)) {
568 ehci_dbg (ehci,
569 "Failed to enable port %d on root hub TT\n",
570 index+1);
571 return port_status;
572 }
573
574 ehci_dbg (ehci, "port %d full speed --> companion\n",
575 index + 1);
576
577 // what happens if HCS_N_CC(params) == 0 ?
578 port_status |= PORT_OWNER;
579 port_status &= ~PORT_RWC_BITS;
580 ehci_writel(ehci, port_status, status_reg);
581
582 /* ensure 440EPX ohci controller state is operational */
583 if (ehci->has_amcc_usb23)
584 set_ohci_hcfs(ehci, 1);
585 } else {
586 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
587 index + 1);
588 /* ensure 440EPx ohci controller state is suspended */
589 if (ehci->has_amcc_usb23)
590 set_ohci_hcfs(ehci, 0);
591 }
592
593 return port_status;
594 }
595
596 /*-------------------------------------------------------------------------*/
597
598
599 /* build "status change" packet (one or two bytes) from HC registers */
600
601 static int
602 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
603 {
604 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
605 u32 temp, status;
606 u32 mask;
607 int ports, i, retval = 1;
608 unsigned long flags;
609 u32 ppcd = ~0;
610
611 /* init status to no-changes */
612 buf [0] = 0;
613 ports = HCS_N_PORTS (ehci->hcs_params);
614 if (ports > 7) {
615 buf [1] = 0;
616 retval++;
617 }
618
619 /* Inform the core about resumes-in-progress by returning
620 * a non-zero value even if there are no status changes.
621 */
622 status = ehci->resuming_ports;
623
624 /* Some boards (mostly VIA?) report bogus overcurrent indications,
625 * causing massive log spam unless we completely ignore them. It
626 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
627 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
628 * PORT_POWER; that's surprising, but maybe within-spec.
629 */
630 if (!ignore_oc)
631 mask = PORT_CSC | PORT_PEC | PORT_OCC;
632 else
633 mask = PORT_CSC | PORT_PEC;
634 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
635
636 /* no hub change reports (bit 0) for now (power, ...) */
637
638 /* port N changes (bit N)? */
639 spin_lock_irqsave (&ehci->lock, flags);
640
641 /* get per-port change detect bits */
642 if (ehci->has_ppcd)
643 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
644
645 for (i = 0; i < ports; i++) {
646 /* leverage per-port change bits feature */
647 if (ppcd & (1 << i))
648 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
649 else
650 temp = 0;
651
652 /*
653 * Return status information even for ports with OWNER set.
654 * Otherwise khubd wouldn't see the disconnect event when a
655 * high-speed device is switched over to the companion
656 * controller by the user.
657 */
658
659 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
660 || (ehci->reset_done[i] && time_after_eq(
661 jiffies, ehci->reset_done[i]))) {
662 if (i < 7)
663 buf [0] |= 1 << (i + 1);
664 else
665 buf [1] |= 1 << (i - 7);
666 status = STS_PCD;
667 }
668 }
669
670 /* If a resume is in progress, make sure it can finish */
671 if (ehci->resuming_ports)
672 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
673
674 spin_unlock_irqrestore (&ehci->lock, flags);
675 return status ? retval : 0;
676 }
677
678 /*-------------------------------------------------------------------------*/
679
680 static void
681 ehci_hub_descriptor (
682 struct ehci_hcd *ehci,
683 struct usb_hub_descriptor *desc
684 ) {
685 int ports = HCS_N_PORTS (ehci->hcs_params);
686 u16 temp;
687
688 desc->bDescriptorType = 0x29;
689 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
690 desc->bHubContrCurrent = 0;
691
692 desc->bNbrPorts = ports;
693 temp = 1 + (ports / 8);
694 desc->bDescLength = 7 + 2 * temp;
695
696 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
697 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
698 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
699
700 temp = 0x0008; /* per-port overcurrent reporting */
701 if (HCS_PPC (ehci->hcs_params))
702 temp |= 0x0001; /* per-port power control */
703 else
704 temp |= 0x0002; /* no power switching */
705 #if 0
706 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
707 if (HCS_INDICATOR (ehci->hcs_params))
708 temp |= 0x0080; /* per-port indicators (LEDs) */
709 #endif
710 desc->wHubCharacteristics = cpu_to_le16(temp);
711 }
712
713 /*-------------------------------------------------------------------------*/
714
715 static int ehci_hub_control (
716 struct usb_hcd *hcd,
717 u16 typeReq,
718 u16 wValue,
719 u16 wIndex,
720 char *buf,
721 u16 wLength
722 ) {
723 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
724 int ports = HCS_N_PORTS (ehci->hcs_params);
725 u32 __iomem *status_reg = &ehci->regs->port_status[
726 (wIndex & 0xff) - 1];
727 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
728 u32 temp, temp1, status;
729 unsigned long flags;
730 int retval = 0;
731 unsigned selector;
732
733 /*
734 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
735 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
736 * (track current state ourselves) ... blink for diagnostics,
737 * power, "this is the one", etc. EHCI spec supports this.
738 */
739
740 spin_lock_irqsave (&ehci->lock, flags);
741 switch (typeReq) {
742 case ClearHubFeature:
743 switch (wValue) {
744 case C_HUB_LOCAL_POWER:
745 case C_HUB_OVER_CURRENT:
746 /* no hub-wide feature/status flags */
747 break;
748 default:
749 goto error;
750 }
751 break;
752 case ClearPortFeature:
753 if (!wIndex || wIndex > ports)
754 goto error;
755 wIndex--;
756 temp = ehci_readl(ehci, status_reg);
757 temp &= ~PORT_RWC_BITS;
758
759 /*
760 * Even if OWNER is set, so the port is owned by the
761 * companion controller, khubd needs to be able to clear
762 * the port-change status bits (especially
763 * USB_PORT_STAT_C_CONNECTION).
764 */
765
766 switch (wValue) {
767 case USB_PORT_FEAT_ENABLE:
768 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
769 break;
770 case USB_PORT_FEAT_C_ENABLE:
771 ehci_writel(ehci, temp | PORT_PEC, status_reg);
772 break;
773 case USB_PORT_FEAT_SUSPEND:
774 if (temp & PORT_RESET)
775 goto error;
776 if (ehci->no_selective_suspend)
777 break;
778 #ifdef CONFIG_USB_OTG
779 if ((hcd->self.otg_port == (wIndex + 1))
780 && hcd->self.b_hnp_enable) {
781 otg_start_hnp(hcd->phy->otg);
782 break;
783 }
784 #endif
785 if (!(temp & PORT_SUSPEND))
786 break;
787 if ((temp & PORT_PE) == 0)
788 goto error;
789
790 /* clear phy low-power mode before resume */
791 if (ehci->has_hostpc) {
792 temp1 = ehci_readl(ehci, hostpc_reg);
793 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
794 hostpc_reg);
795 spin_unlock_irqrestore(&ehci->lock, flags);
796 msleep(5);/* wait to leave low-power mode */
797 spin_lock_irqsave(&ehci->lock, flags);
798 }
799 /* resume signaling for 20 msec */
800 temp &= ~PORT_WAKE_BITS;
801 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
802 ehci->reset_done[wIndex] = jiffies
803 + msecs_to_jiffies(20);
804 break;
805 case USB_PORT_FEAT_C_SUSPEND:
806 clear_bit(wIndex, &ehci->port_c_suspend);
807 break;
808 case USB_PORT_FEAT_POWER:
809 if (HCS_PPC (ehci->hcs_params))
810 ehci_writel(ehci, temp & ~PORT_POWER,
811 status_reg);
812 break;
813 case USB_PORT_FEAT_C_CONNECTION:
814 ehci_writel(ehci, temp | PORT_CSC, status_reg);
815 break;
816 case USB_PORT_FEAT_C_OVER_CURRENT:
817 ehci_writel(ehci, temp | PORT_OCC, status_reg);
818 break;
819 case USB_PORT_FEAT_C_RESET:
820 /* GetPortStatus clears reset */
821 break;
822 default:
823 goto error;
824 }
825 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
826 break;
827 case GetHubDescriptor:
828 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
829 buf);
830 break;
831 case GetHubStatus:
832 /* no hub-wide feature/status flags */
833 memset (buf, 0, 4);
834 //cpu_to_le32s ((u32 *) buf);
835 break;
836 case GetPortStatus:
837 if (!wIndex || wIndex > ports)
838 goto error;
839 wIndex--;
840 status = 0;
841 temp = ehci_readl(ehci, status_reg);
842
843 // wPortChange bits
844 if (temp & PORT_CSC)
845 status |= USB_PORT_STAT_C_CONNECTION << 16;
846 if (temp & PORT_PEC)
847 status |= USB_PORT_STAT_C_ENABLE << 16;
848
849 if ((temp & PORT_OCC) && !ignore_oc){
850 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
851
852 /*
853 * Hubs should disable port power on over-current.
854 * However, not all EHCI implementations do this
855 * automatically, even if they _do_ support per-port
856 * power switching; they're allowed to just limit the
857 * current. khubd will turn the power back on.
858 */
859 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
860 && HCS_PPC(ehci->hcs_params)) {
861 ehci_writel(ehci,
862 temp & ~(PORT_RWC_BITS | PORT_POWER),
863 status_reg);
864 temp = ehci_readl(ehci, status_reg);
865 }
866 }
867
868 /* whoever resumes must GetPortStatus to complete it!! */
869 if (temp & PORT_RESUME) {
870
871 /* Remote Wakeup received? */
872 if (!ehci->reset_done[wIndex]) {
873 /* resume signaling for 20 msec */
874 ehci->reset_done[wIndex] = jiffies
875 + msecs_to_jiffies(20);
876 usb_hcd_start_port_resume(&hcd->self, wIndex);
877 /* check the port again */
878 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
879 ehci->reset_done[wIndex]);
880 }
881
882 /* resume completed? */
883 else if (time_after_eq(jiffies,
884 ehci->reset_done[wIndex])) {
885 clear_bit(wIndex, &ehci->suspended_ports);
886 set_bit(wIndex, &ehci->port_c_suspend);
887 ehci->reset_done[wIndex] = 0;
888 usb_hcd_end_port_resume(&hcd->self, wIndex);
889
890 /* stop resume signaling */
891 temp &= ~(PORT_RWC_BITS |
892 PORT_SUSPEND | PORT_RESUME);
893 ehci_writel(ehci, temp, status_reg);
894 clear_bit(wIndex, &ehci->resuming_ports);
895 retval = ehci_handshake(ehci, status_reg,
896 PORT_RESUME, 0, 2000 /* 2msec */);
897 if (retval != 0) {
898 ehci_err(ehci,
899 "port %d resume error %d\n",
900 wIndex + 1, retval);
901 goto error;
902 }
903 temp = ehci_readl(ehci, status_reg);
904 }
905 }
906
907 /* whoever resets must GetPortStatus to complete it!! */
908 if ((temp & PORT_RESET)
909 && time_after_eq(jiffies,
910 ehci->reset_done[wIndex])) {
911 status |= USB_PORT_STAT_C_RESET << 16;
912 ehci->reset_done [wIndex] = 0;
913 clear_bit(wIndex, &ehci->resuming_ports);
914
915 /* force reset to complete */
916 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
917 status_reg);
918 /* REVISIT: some hardware needs 550+ usec to clear
919 * this bit; seems too long to spin routinely...
920 */
921 retval = ehci_handshake(ehci, status_reg,
922 PORT_RESET, 0, 1000);
923 if (retval != 0) {
924 ehci_err (ehci, "port %d reset error %d\n",
925 wIndex + 1, retval);
926 goto error;
927 }
928
929 /* see what we found out */
930 temp = check_reset_complete (ehci, wIndex, status_reg,
931 ehci_readl(ehci, status_reg));
932 }
933
934 if (!(temp & (PORT_RESUME|PORT_RESET))) {
935 ehci->reset_done[wIndex] = 0;
936 clear_bit(wIndex, &ehci->resuming_ports);
937 }
938
939 /* transfer dedicated ports to the companion hc */
940 if ((temp & PORT_CONNECT) &&
941 test_bit(wIndex, &ehci->companion_ports)) {
942 temp &= ~PORT_RWC_BITS;
943 temp |= PORT_OWNER;
944 ehci_writel(ehci, temp, status_reg);
945 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
946 temp = ehci_readl(ehci, status_reg);
947 }
948
949 /*
950 * Even if OWNER is set, there's no harm letting khubd
951 * see the wPortStatus values (they should all be 0 except
952 * for PORT_POWER anyway).
953 */
954
955 if (temp & PORT_CONNECT) {
956 status |= USB_PORT_STAT_CONNECTION;
957 // status may be from integrated TT
958 if (ehci->has_hostpc) {
959 temp1 = ehci_readl(ehci, hostpc_reg);
960 status |= ehci_port_speed(ehci, temp1);
961 } else
962 status |= ehci_port_speed(ehci, temp);
963 }
964 if (temp & PORT_PE)
965 status |= USB_PORT_STAT_ENABLE;
966
967 /* maybe the port was unsuspended without our knowledge */
968 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
969 status |= USB_PORT_STAT_SUSPEND;
970 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
971 clear_bit(wIndex, &ehci->suspended_ports);
972 clear_bit(wIndex, &ehci->resuming_ports);
973 ehci->reset_done[wIndex] = 0;
974 if (temp & PORT_PE)
975 set_bit(wIndex, &ehci->port_c_suspend);
976 usb_hcd_end_port_resume(&hcd->self, wIndex);
977 }
978
979 if (temp & PORT_OC)
980 status |= USB_PORT_STAT_OVERCURRENT;
981 if (temp & PORT_RESET)
982 status |= USB_PORT_STAT_RESET;
983 if (temp & PORT_POWER)
984 status |= USB_PORT_STAT_POWER;
985 if (test_bit(wIndex, &ehci->port_c_suspend))
986 status |= USB_PORT_STAT_C_SUSPEND << 16;
987
988 #ifndef VERBOSE_DEBUG
989 if (status & ~0xffff) /* only if wPortChange is interesting */
990 #endif
991 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
992 put_unaligned_le32(status, buf);
993 break;
994 case SetHubFeature:
995 switch (wValue) {
996 case C_HUB_LOCAL_POWER:
997 case C_HUB_OVER_CURRENT:
998 /* no hub-wide feature/status flags */
999 break;
1000 default:
1001 goto error;
1002 }
1003 break;
1004 case SetPortFeature:
1005 selector = wIndex >> 8;
1006 wIndex &= 0xff;
1007 if (unlikely(ehci->debug)) {
1008 /* If the debug port is active any port
1009 * feature requests should get denied */
1010 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1011 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1012 retval = -ENODEV;
1013 goto error_exit;
1014 }
1015 }
1016 if (!wIndex || wIndex > ports)
1017 goto error;
1018 wIndex--;
1019 temp = ehci_readl(ehci, status_reg);
1020 if (temp & PORT_OWNER)
1021 break;
1022
1023 temp &= ~PORT_RWC_BITS;
1024 switch (wValue) {
1025 case USB_PORT_FEAT_SUSPEND:
1026 if (ehci->no_selective_suspend)
1027 break;
1028 if ((temp & PORT_PE) == 0
1029 || (temp & PORT_RESET) != 0)
1030 goto error;
1031
1032 /* After above check the port must be connected.
1033 * Set appropriate bit thus could put phy into low power
1034 * mode if we have hostpc feature
1035 */
1036 temp &= ~PORT_WKCONN_E;
1037 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1038 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1039 if (ehci->has_hostpc) {
1040 spin_unlock_irqrestore(&ehci->lock, flags);
1041 msleep(5);/* 5ms for HCD enter low pwr mode */
1042 spin_lock_irqsave(&ehci->lock, flags);
1043 temp1 = ehci_readl(ehci, hostpc_reg);
1044 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1045 hostpc_reg);
1046 temp1 = ehci_readl(ehci, hostpc_reg);
1047 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1048 wIndex, (temp1 & HOSTPC_PHCD) ?
1049 "succeeded" : "failed");
1050 }
1051 set_bit(wIndex, &ehci->suspended_ports);
1052 break;
1053 case USB_PORT_FEAT_POWER:
1054 if (HCS_PPC (ehci->hcs_params))
1055 ehci_writel(ehci, temp | PORT_POWER,
1056 status_reg);
1057 break;
1058 case USB_PORT_FEAT_RESET:
1059 if (temp & PORT_RESUME)
1060 goto error;
1061 /* line status bits may report this as low speed,
1062 * which can be fine if this root hub has a
1063 * transaction translator built in.
1064 */
1065 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1066 && !ehci_is_TDI(ehci)
1067 && PORT_USB11 (temp)) {
1068 ehci_dbg (ehci,
1069 "port %d low speed --> companion\n",
1070 wIndex + 1);
1071 temp |= PORT_OWNER;
1072 } else {
1073 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1074 temp |= PORT_RESET;
1075 temp &= ~PORT_PE;
1076
1077 /*
1078 * caller must wait, then call GetPortStatus
1079 * usb 2.0 spec says 50 ms resets on root
1080 */
1081 ehci->reset_done [wIndex] = jiffies
1082 + msecs_to_jiffies (50);
1083 }
1084 ehci_writel(ehci, temp, status_reg);
1085 break;
1086
1087 /* For downstream facing ports (these): one hub port is put
1088 * into test mode according to USB2 11.24.2.13, then the hub
1089 * must be reset (which for root hub now means rmmod+modprobe,
1090 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1091 * about the EHCI-specific stuff.
1092 */
1093 case USB_PORT_FEAT_TEST:
1094 if (!selector || selector > 5)
1095 goto error;
1096 spin_unlock_irqrestore(&ehci->lock, flags);
1097 ehci_quiesce(ehci);
1098 spin_lock_irqsave(&ehci->lock, flags);
1099
1100 /* Put all enabled ports into suspend */
1101 while (ports--) {
1102 u32 __iomem *sreg =
1103 &ehci->regs->port_status[ports];
1104
1105 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1106 if (temp & PORT_PE)
1107 ehci_writel(ehci, temp | PORT_SUSPEND,
1108 sreg);
1109 }
1110
1111 spin_unlock_irqrestore(&ehci->lock, flags);
1112 ehci_halt(ehci);
1113 spin_lock_irqsave(&ehci->lock, flags);
1114
1115 temp = ehci_readl(ehci, status_reg);
1116 temp |= selector << 16;
1117 ehci_writel(ehci, temp, status_reg);
1118 break;
1119
1120 default:
1121 goto error;
1122 }
1123 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1124 break;
1125
1126 default:
1127 error:
1128 /* "stall" on error */
1129 retval = -EPIPE;
1130 }
1131 error_exit:
1132 spin_unlock_irqrestore (&ehci->lock, flags);
1133 return retval;
1134 }
1135
1136 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1137 {
1138 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1139
1140 if (ehci_is_TDI(ehci))
1141 return;
1142 set_owner(ehci, --portnum, PORT_OWNER);
1143 }
1144
1145 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1146 {
1147 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1148 u32 __iomem *reg;
1149
1150 if (ehci_is_TDI(ehci))
1151 return 0;
1152 reg = &ehci->regs->port_status[portnum - 1];
1153 return ehci_readl(ehci, reg) & PORT_OWNER;
1154 }
Linux kernel - Deliverables
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