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Realtek cr: Remove unused Macros
[zen-stable.git] / drivers / usb / host / ehci-hub.c
blobea6184bf48d05d2730e899b901201bec985e11b3
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 /* After a power loss, ports that were owned by the companion must be
46 * reset so that the companion can still own them.
47 */
48 static 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
110 static 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
131 static __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
204 static 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 */
340 static 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 u8 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 resume_needed = 1;
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, &ehci->bus_suspended) &&
435 (temp & PORT_SUSPEND)) {
436 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
437 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
438 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
439 }
440 }
441 (void) ehci_readl(ehci, &ehci->regs->command);
442
443 /* maybe re-activate the schedule(s) */
444 temp = 0;
445 if (ehci->async->qh_next.qh)
446 temp |= CMD_ASE;
447 if (ehci->periodic_sched)
448 temp |= CMD_PSE;
449 if (temp) {
450 ehci->command |= temp;
451 ehci_writel(ehci, ehci->command, &ehci->regs->command);
452 }
453
454 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
455 hcd->state = HC_STATE_RUNNING;
456
457 /* Now we can safely re-enable irqs */
458 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
459
460 spin_unlock_irq (&ehci->lock);
461 ehci_handover_companion_ports(ehci);
462 return 0;
463 }
464
465 #else
466
467 #define ehci_bus_suspend NULL
468 #define ehci_bus_resume NULL
469
470 #endif /* CONFIG_PM */
471
472 /*-------------------------------------------------------------------------*/
473
474 /* Display the ports dedicated to the companion controller */
475 static ssize_t show_companion(struct device *dev,
476 struct device_attribute *attr,
477 char *buf)
478 {
479 struct ehci_hcd *ehci;
480 int nports, index, n;
481 int count = PAGE_SIZE;
482 char *ptr = buf;
483
484 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
485 nports = HCS_N_PORTS(ehci->hcs_params);
486
487 for (index = 0; index < nports; ++index) {
488 if (test_bit(index, &ehci->companion_ports)) {
489 n = scnprintf(ptr, count, "%d\n", index + 1);
490 ptr += n;
491 count -= n;
492 }
493 }
494 return ptr - buf;
495 }
496
497 /*
498 * Sets the owner of a port
499 */
500 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
501 {
502 u32 __iomem *status_reg;
503 u32 port_status;
504 int try;
505
506 status_reg = &ehci->regs->port_status[portnum];
507
508 /*
509 * The controller won't set the OWNER bit if the port is
510 * enabled, so this loop will sometimes require at least two
511 * iterations: one to disable the port and one to set OWNER.
512 */
513 for (try = 4; try > 0; --try) {
514 spin_lock_irq(&ehci->lock);
515 port_status = ehci_readl(ehci, status_reg);
516 if ((port_status & PORT_OWNER) == new_owner
517 || (port_status & (PORT_OWNER | PORT_CONNECT))
518 == 0)
519 try = 0;
520 else {
521 port_status ^= PORT_OWNER;
522 port_status &= ~(PORT_PE | PORT_RWC_BITS);
523 ehci_writel(ehci, port_status, status_reg);
524 }
525 spin_unlock_irq(&ehci->lock);
526 if (try > 1)
527 msleep(5);
528 }
529 }
530
531 /*
532 * Dedicate or undedicate a port to the companion controller.
533 * Syntax is "[-]portnum", where a leading '-' sign means
534 * return control of the port to the EHCI controller.
535 */
536 static ssize_t store_companion(struct device *dev,
537 struct device_attribute *attr,
538 const char *buf, size_t count)
539 {
540 struct ehci_hcd *ehci;
541 int portnum, new_owner;
542
543 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
544 new_owner = PORT_OWNER; /* Owned by companion */
545 if (sscanf(buf, "%d", &portnum) != 1)
546 return -EINVAL;
547 if (portnum < 0) {
548 portnum = - portnum;
549 new_owner = 0; /* Owned by EHCI */
550 }
551 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
552 return -ENOENT;
553 portnum--;
554 if (new_owner)
555 set_bit(portnum, &ehci->companion_ports);
556 else
557 clear_bit(portnum, &ehci->companion_ports);
558 set_owner(ehci, portnum, new_owner);
559 return count;
560 }
561 static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
562
563 static inline int create_companion_file(struct ehci_hcd *ehci)
564 {
565 int i = 0;
566
567 /* with integrated TT there is no companion! */
568 if (!ehci_is_TDI(ehci))
569 i = device_create_file(ehci_to_hcd(ehci)->self.controller,
570 &dev_attr_companion);
571 return i;
572 }
573
574 static inline void remove_companion_file(struct ehci_hcd *ehci)
575 {
576 /* with integrated TT there is no companion! */
577 if (!ehci_is_TDI(ehci))
578 device_remove_file(ehci_to_hcd(ehci)->self.controller,
579 &dev_attr_companion);
580 }
581
582
583 /*-------------------------------------------------------------------------*/
584
585 static int check_reset_complete (
586 struct ehci_hcd *ehci,
587 int index,
588 u32 __iomem *status_reg,
589 int port_status
590 ) {
591 if (!(port_status & PORT_CONNECT))
592 return port_status;
593
594 /* if reset finished and it's still not enabled -- handoff */
595 if (!(port_status & PORT_PE)) {
596
597 /* with integrated TT, there's nobody to hand it to! */
598 if (ehci_is_TDI(ehci)) {
599 ehci_dbg (ehci,
600 "Failed to enable port %d on root hub TT\n",
601 index+1);
602 return port_status;
603 }
604
605 ehci_dbg (ehci, "port %d full speed --> companion\n",
606 index + 1);
607
608 // what happens if HCS_N_CC(params) == 0 ?
609 port_status |= PORT_OWNER;
610 port_status &= ~PORT_RWC_BITS;
611 ehci_writel(ehci, port_status, status_reg);
612
613 /* ensure 440EPX ohci controller state is operational */
614 if (ehci->has_amcc_usb23)
615 set_ohci_hcfs(ehci, 1);
616 } else {
617 ehci_dbg (ehci, "port %d high speed\n", index + 1);
618 /* ensure 440EPx ohci controller state is suspended */
619 if (ehci->has_amcc_usb23)
620 set_ohci_hcfs(ehci, 0);
621 }
622
623 return port_status;
624 }
625
626 /*-------------------------------------------------------------------------*/
627
628
629 /* build "status change" packet (one or two bytes) from HC registers */
630
631 static int
632 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
633 {
634 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
635 u32 temp, status = 0;
636 u32 mask;
637 int ports, i, retval = 1;
638 unsigned long flags;
639 u32 ppcd = 0;
640
641 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
642 if (!HC_IS_RUNNING(hcd->state))
643 return 0;
644
645 /* init status to no-changes */
646 buf [0] = 0;
647 ports = HCS_N_PORTS (ehci->hcs_params);
648 if (ports > 7) {
649 buf [1] = 0;
650 retval++;
651 }
652
653 /* Some boards (mostly VIA?) report bogus overcurrent indications,
654 * causing massive log spam unless we completely ignore them. It
655 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
656 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
657 * PORT_POWER; that's surprising, but maybe within-spec.
658 */
659 if (!ignore_oc)
660 mask = PORT_CSC | PORT_PEC | PORT_OCC;
661 else
662 mask = PORT_CSC | PORT_PEC;
663 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
664
665 /* no hub change reports (bit 0) for now (power, ...) */
666
667 /* port N changes (bit N)? */
668 spin_lock_irqsave (&ehci->lock, flags);
669
670 /* get per-port change detect bits */
671 if (ehci->has_ppcd)
672 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
673
674 for (i = 0; i < ports; i++) {
675 /* leverage per-port change bits feature */
676 if (ehci->has_ppcd && !(ppcd & (1 << i)))
677 continue;
678 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
679
680 /*
681 * Return status information even for ports with OWNER set.
682 * Otherwise khubd wouldn't see the disconnect event when a
683 * high-speed device is switched over to the companion
684 * controller by the user.
685 */
686
687 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
688 || (ehci->reset_done[i] && time_after_eq(
689 jiffies, ehci->reset_done[i]))) {
690 if (i < 7)
691 buf [0] |= 1 << (i + 1);
692 else
693 buf [1] |= 1 << (i - 7);
694 status = STS_PCD;
695 }
696 }
697 /* FIXME autosuspend idle root hubs */
698 spin_unlock_irqrestore (&ehci->lock, flags);
699 return status ? retval : 0;
700 }
701
702 /*-------------------------------------------------------------------------*/
703
704 static void
705 ehci_hub_descriptor (
706 struct ehci_hcd *ehci,
707 struct usb_hub_descriptor *desc
708 ) {
709 int ports = HCS_N_PORTS (ehci->hcs_params);
710 u16 temp;
711
712 desc->bDescriptorType = 0x29;
713 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
714 desc->bHubContrCurrent = 0;
715
716 desc->bNbrPorts = ports;
717 temp = 1 + (ports / 8);
718 desc->bDescLength = 7 + 2 * temp;
719
720 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
721 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
722 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
723
724 temp = 0x0008; /* per-port overcurrent reporting */
725 if (HCS_PPC (ehci->hcs_params))
726 temp |= 0x0001; /* per-port power control */
727 else
728 temp |= 0x0002; /* no power switching */
729 #if 0
730 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
731 if (HCS_INDICATOR (ehci->hcs_params))
732 temp |= 0x0080; /* per-port indicators (LEDs) */
733 #endif
734 desc->wHubCharacteristics = cpu_to_le16(temp);
735 }
736
737 /*-------------------------------------------------------------------------*/
738
739 static int ehci_hub_control (
740 struct usb_hcd *hcd,
741 u16 typeReq,
742 u16 wValue,
743 u16 wIndex,
744 char *buf,
745 u16 wLength
746 ) {
747 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
748 int ports = HCS_N_PORTS (ehci->hcs_params);
749 u32 __iomem *status_reg = &ehci->regs->port_status[
750 (wIndex & 0xff) - 1];
751 u32 __iomem *hostpc_reg = NULL;
752 u32 temp, temp1, status;
753 unsigned long flags;
754 int retval = 0;
755 unsigned selector;
756
757 /*
758 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
759 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
760 * (track current state ourselves) ... blink for diagnostics,
761 * power, "this is the one", etc. EHCI spec supports this.
762 */
763
764 if (ehci->has_hostpc)
765 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
766 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
767 spin_lock_irqsave (&ehci->lock, flags);
768 switch (typeReq) {
769 case ClearHubFeature:
770 switch (wValue) {
771 case C_HUB_LOCAL_POWER:
772 case C_HUB_OVER_CURRENT:
773 /* no hub-wide feature/status flags */
774 break;
775 default:
776 goto error;
777 }
778 break;
779 case ClearPortFeature:
780 if (!wIndex || wIndex > ports)
781 goto error;
782 wIndex--;
783 temp = ehci_readl(ehci, status_reg);
784
785 /*
786 * Even if OWNER is set, so the port is owned by the
787 * companion controller, khubd needs to be able to clear
788 * the port-change status bits (especially
789 * USB_PORT_STAT_C_CONNECTION).
790 */
791
792 switch (wValue) {
793 case USB_PORT_FEAT_ENABLE:
794 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
795 break;
796 case USB_PORT_FEAT_C_ENABLE:
797 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
798 status_reg);
799 break;
800 case USB_PORT_FEAT_SUSPEND:
801 if (temp & PORT_RESET)
802 goto error;
803 if (ehci->no_selective_suspend)
804 break;
805 #ifdef CONFIG_USB_OTG
806 if ((hcd->self.otg_port == (wIndex + 1))
807 && hcd->self.b_hnp_enable) {
808 otg_start_hnp(ehci->transceiver);
809 break;
810 }
811 #endif
812 if (!(temp & PORT_SUSPEND))
813 break;
814 if ((temp & PORT_PE) == 0)
815 goto error;
816
817 /* clear phy low-power mode before resume */
818 if (hostpc_reg) {
819 temp1 = ehci_readl(ehci, hostpc_reg);
820 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
821 hostpc_reg);
822 spin_unlock_irqrestore(&ehci->lock, flags);
823 msleep(5);/* wait to leave low-power mode */
824 spin_lock_irqsave(&ehci->lock, flags);
825 }
826 /* resume signaling for 20 msec */
827 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
828 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
829 ehci->reset_done[wIndex] = jiffies
830 + msecs_to_jiffies(20);
831 break;
832 case USB_PORT_FEAT_C_SUSPEND:
833 clear_bit(wIndex, &ehci->port_c_suspend);
834 break;
835 case USB_PORT_FEAT_POWER:
836 if (HCS_PPC (ehci->hcs_params))
837 ehci_writel(ehci,
838 temp & ~(PORT_RWC_BITS | PORT_POWER),
839 status_reg);
840 break;
841 case USB_PORT_FEAT_C_CONNECTION:
842 if (ehci->has_lpm) {
843 /* clear PORTSC bits on disconnect */
844 temp &= ~PORT_LPM;
845 temp &= ~PORT_DEV_ADDR;
846 }
847 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
848 status_reg);
849 break;
850 case USB_PORT_FEAT_C_OVER_CURRENT:
851 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
852 status_reg);
853 break;
854 case USB_PORT_FEAT_C_RESET:
855 /* GetPortStatus clears reset */
856 break;
857 default:
858 goto error;
859 }
860 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
861 break;
862 case GetHubDescriptor:
863 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
864 buf);
865 break;
866 case GetHubStatus:
867 /* no hub-wide feature/status flags */
868 memset (buf, 0, 4);
869 //cpu_to_le32s ((u32 *) buf);
870 break;
871 case GetPortStatus:
872 if (!wIndex || wIndex > ports)
873 goto error;
874 wIndex--;
875 status = 0;
876 temp = ehci_readl(ehci, status_reg);
877
878 // wPortChange bits
879 if (temp & PORT_CSC)
880 status |= USB_PORT_STAT_C_CONNECTION << 16;
881 if (temp & PORT_PEC)
882 status |= USB_PORT_STAT_C_ENABLE << 16;
883
884 if ((temp & PORT_OCC) && !ignore_oc){
885 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
886
887 /*
888 * Hubs should disable port power on over-current.
889 * However, not all EHCI implementations do this
890 * automatically, even if they _do_ support per-port
891 * power switching; they're allowed to just limit the
892 * current. khubd will turn the power back on.
893 */
894 if (HCS_PPC (ehci->hcs_params)){
895 ehci_writel(ehci,
896 temp & ~(PORT_RWC_BITS | PORT_POWER),
897 status_reg);
898 }
899 }
900
901 /* whoever resumes must GetPortStatus to complete it!! */
902 if (temp & PORT_RESUME) {
903
904 /* Remote Wakeup received? */
905 if (!ehci->reset_done[wIndex]) {
906 /* resume signaling for 20 msec */
907 ehci->reset_done[wIndex] = jiffies
908 + msecs_to_jiffies(20);
909 /* check the port again */
910 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
911 ehci->reset_done[wIndex]);
912 }
913
914 /* resume completed? */
915 else if (time_after_eq(jiffies,
916 ehci->reset_done[wIndex])) {
917 clear_bit(wIndex, &ehci->suspended_ports);
918 set_bit(wIndex, &ehci->port_c_suspend);
919 ehci->reset_done[wIndex] = 0;
920
921 /* stop resume signaling */
922 temp = ehci_readl(ehci, status_reg);
923 ehci_writel(ehci,
924 temp & ~(PORT_RWC_BITS | PORT_RESUME),
925 status_reg);
926 retval = handshake(ehci, status_reg,
927 PORT_RESUME, 0, 2000 /* 2msec */);
928 if (retval != 0) {
929 ehci_err(ehci,
930 "port %d resume error %d\n",
931 wIndex + 1, retval);
932 goto error;
933 }
934 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
935 }
936 }
937
938 /* whoever resets must GetPortStatus to complete it!! */
939 if ((temp & PORT_RESET)
940 && time_after_eq(jiffies,
941 ehci->reset_done[wIndex])) {
942 status |= USB_PORT_STAT_C_RESET << 16;
943 ehci->reset_done [wIndex] = 0;
944
945 /* force reset to complete */
946 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
947 status_reg);
948 /* REVISIT: some hardware needs 550+ usec to clear
949 * this bit; seems too long to spin routinely...
950 */
951 retval = handshake(ehci, status_reg,
952 PORT_RESET, 0, 1000);
953 if (retval != 0) {
954 ehci_err (ehci, "port %d reset error %d\n",
955 wIndex + 1, retval);
956 goto error;
957 }
958
959 /* see what we found out */
960 temp = check_reset_complete (ehci, wIndex, status_reg,
961 ehci_readl(ehci, status_reg));
962 }
963
964 if (!(temp & (PORT_RESUME|PORT_RESET)))
965 ehci->reset_done[wIndex] = 0;
966
967 /* transfer dedicated ports to the companion hc */
968 if ((temp & PORT_CONNECT) &&
969 test_bit(wIndex, &ehci->companion_ports)) {
970 temp &= ~PORT_RWC_BITS;
971 temp |= PORT_OWNER;
972 ehci_writel(ehci, temp, status_reg);
973 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
974 temp = ehci_readl(ehci, status_reg);
975 }
976
977 /*
978 * Even if OWNER is set, there's no harm letting khubd
979 * see the wPortStatus values (they should all be 0 except
980 * for PORT_POWER anyway).
981 */
982
983 if (temp & PORT_CONNECT) {
984 status |= USB_PORT_STAT_CONNECTION;
985 // status may be from integrated TT
986 if (ehci->has_hostpc) {
987 temp1 = ehci_readl(ehci, hostpc_reg);
988 status |= ehci_port_speed(ehci, temp1);
989 } else
990 status |= ehci_port_speed(ehci, temp);
991 }
992 if (temp & PORT_PE)
993 status |= USB_PORT_STAT_ENABLE;
994
995 /* maybe the port was unsuspended without our knowledge */
996 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
997 status |= USB_PORT_STAT_SUSPEND;
998 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
999 clear_bit(wIndex, &ehci->suspended_ports);
1000 ehci->reset_done[wIndex] = 0;
1001 if (temp & PORT_PE)
1002 set_bit(wIndex, &ehci->port_c_suspend);
1003 }
1004
1005 if (temp & PORT_OC)
1006 status |= USB_PORT_STAT_OVERCURRENT;
1007 if (temp & PORT_RESET)
1008 status |= USB_PORT_STAT_RESET;
1009 if (temp & PORT_POWER)
1010 status |= USB_PORT_STAT_POWER;
1011 if (test_bit(wIndex, &ehci->port_c_suspend))
1012 status |= USB_PORT_STAT_C_SUSPEND << 16;
1013
1014 #ifndef VERBOSE_DEBUG
1015 if (status & ~0xffff) /* only if wPortChange is interesting */
1016 #endif
1017 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
1018 put_unaligned_le32(status, buf);
1019 break;
1020 case SetHubFeature:
1021 switch (wValue) {
1022 case C_HUB_LOCAL_POWER:
1023 case C_HUB_OVER_CURRENT:
1024 /* no hub-wide feature/status flags */
1025 break;
1026 default:
1027 goto error;
1028 }
1029 break;
1030 case SetPortFeature:
1031 selector = wIndex >> 8;
1032 wIndex &= 0xff;
1033 if (unlikely(ehci->debug)) {
1034 /* If the debug port is active any port
1035 * feature requests should get denied */
1036 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1037 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1038 retval = -ENODEV;
1039 goto error_exit;
1040 }
1041 }
1042 if (!wIndex || wIndex > ports)
1043 goto error;
1044 wIndex--;
1045 temp = ehci_readl(ehci, status_reg);
1046 if (temp & PORT_OWNER)
1047 break;
1048
1049 temp &= ~PORT_RWC_BITS;
1050 switch (wValue) {
1051 case USB_PORT_FEAT_SUSPEND:
1052 if (ehci->no_selective_suspend)
1053 break;
1054 if ((temp & PORT_PE) == 0
1055 || (temp & PORT_RESET) != 0)
1056 goto error;
1057
1058 /* After above check the port must be connected.
1059 * Set appropriate bit thus could put phy into low power
1060 * mode if we have hostpc feature
1061 */
1062 temp &= ~PORT_WKCONN_E;
1063 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1064 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1065 if (hostpc_reg) {
1066 spin_unlock_irqrestore(&ehci->lock, flags);
1067 msleep(5);/* 5ms for HCD enter low pwr mode */
1068 spin_lock_irqsave(&ehci->lock, flags);
1069 temp1 = ehci_readl(ehci, hostpc_reg);
1070 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1071 hostpc_reg);
1072 temp1 = ehci_readl(ehci, hostpc_reg);
1073 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1074 wIndex, (temp1 & HOSTPC_PHCD) ?
1075 "succeeded" : "failed");
1076 }
1077 set_bit(wIndex, &ehci->suspended_ports);
1078 break;
1079 case USB_PORT_FEAT_POWER:
1080 if (HCS_PPC (ehci->hcs_params))
1081 ehci_writel(ehci, temp | PORT_POWER,
1082 status_reg);
1083 break;
1084 case USB_PORT_FEAT_RESET:
1085 if (temp & PORT_RESUME)
1086 goto error;
1087 /* line status bits may report this as low speed,
1088 * which can be fine if this root hub has a
1089 * transaction translator built in.
1090 */
1091 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1092 && !ehci_is_TDI(ehci)
1093 && PORT_USB11 (temp)) {
1094 ehci_dbg (ehci,
1095 "port %d low speed --> companion\n",
1096 wIndex + 1);
1097 temp |= PORT_OWNER;
1098 } else {
1099 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1100 temp |= PORT_RESET;
1101 temp &= ~PORT_PE;
1102
1103 /*
1104 * caller must wait, then call GetPortStatus
1105 * usb 2.0 spec says 50 ms resets on root
1106 */
1107 ehci->reset_done [wIndex] = jiffies
1108 + msecs_to_jiffies (50);
1109 }
1110 ehci_writel(ehci, temp, status_reg);
1111 break;
1112
1113 /* For downstream facing ports (these): one hub port is put
1114 * into test mode according to USB2 11.24.2.13, then the hub
1115 * must be reset (which for root hub now means rmmod+modprobe,
1116 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1117 * about the EHCI-specific stuff.
1118 */
1119 case USB_PORT_FEAT_TEST:
1120 if (!selector || selector > 5)
1121 goto error;
1122 ehci_quiesce(ehci);
1123 ehci_halt(ehci);
1124 temp |= selector << 16;
1125 ehci_writel(ehci, temp, status_reg);
1126 break;
1127
1128 default:
1129 goto error;
1130 }
1131 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1132 break;
1133
1134 default:
1135 error:
1136 /* "stall" on error */
1137 retval = -EPIPE;
1138 }
1139 error_exit:
1140 spin_unlock_irqrestore (&ehci->lock, flags);
1141 return retval;
1142 }
1143
1144 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1145 {
1146 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1147
1148 if (ehci_is_TDI(ehci))
1149 return;
1150 set_owner(ehci, --portnum, PORT_OWNER);
1151 }
1152
1153 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1154 {
1155 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1156 u32 __iomem *reg;
1157
1158 if (ehci_is_TDI(ehci))
1159 return 0;
1160 reg = &ehci->regs->port_status[portnum - 1];
1161 return ehci_readl(ehci, reg) & PORT_OWNER;
1162 }