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Merge tag 'gadget-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi...
[GitHub/mt8127/android_kernel_alcatel_ttab.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 /* 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 __maybe_unused ehci_port_change(struct ehci_hcd *ehci)
111 {
112 int i = HCS_N_PORTS(ehci->hcs_params);
113
114 /* First check if the controller indicates a change event */
115
116 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
117 return 1;
118
119 /*
120 * Not all controllers appear to update this while going from D3 to D0,
121 * so check the individual port status registers as well
122 */
123
124 while (i--)
125 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
126 return 1;
127
128 return 0;
129 }
130
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 = &ehci->regs->hostpc[port];
153
154 temp = ehci_readl(ehci, hostpc_reg);
155 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
156 }
157 spin_unlock_irqrestore(&ehci->lock, flags);
158 msleep(5);
159 spin_lock_irqsave(&ehci->lock, flags);
160 }
161
162 port = HCS_N_PORTS(ehci->hcs_params);
163 while (port--) {
164 u32 __iomem *reg = &ehci->regs->port_status[port];
165 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
166 u32 t2 = t1 & ~PORT_WAKE_BITS;
167
168 /* If we are suspending the controller, clear the flags.
169 * If we are resuming the controller, set the wakeup flags.
170 */
171 if (!suspending) {
172 if (t1 & PORT_CONNECT)
173 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
174 else
175 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
176 }
177 ehci_vdbg(ehci, "port %d, %08x -> %08x\n",
178 port + 1, t1, t2);
179 ehci_writel(ehci, t2, reg);
180 }
181
182 /* enter phy low-power mode again */
183 if (ehci->has_hostpc) {
184 port = HCS_N_PORTS(ehci->hcs_params);
185 while (port--) {
186 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
187
188 temp = ehci_readl(ehci, hostpc_reg);
189 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
190 }
191 }
192
193 /* Does the root hub have a port wakeup pending? */
194 if (!suspending && ehci_port_change(ehci))
195 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
196
197 spin_unlock_irqrestore(&ehci->lock, flags);
198 }
199
200 static int ehci_bus_suspend (struct usb_hcd *hcd)
201 {
202 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
203 int port;
204 int mask;
205 int changed;
206
207 ehci_dbg(ehci, "suspend root hub\n");
208
209 if (time_before (jiffies, ehci->next_statechange))
210 msleep(5);
211 del_timer_sync(&ehci->watchdog);
212 del_timer_sync(&ehci->iaa_watchdog);
213
214 spin_lock_irq (&ehci->lock);
215
216 /* Once the controller is stopped, port resumes that are already
217 * in progress won't complete. Hence if remote wakeup is enabled
218 * for the root hub and any ports are in the middle of a resume or
219 * remote wakeup, we must fail the suspend.
220 */
221 if (hcd->self.root_hub->do_remote_wakeup) {
222 if (ehci->resuming_ports) {
223 spin_unlock_irq(&ehci->lock);
224 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
225 return -EBUSY;
226 }
227 }
228
229 /* stop schedules, clean any completed work */
230 if (ehci->rh_state == EHCI_RH_RUNNING)
231 ehci_quiesce (ehci);
232 ehci_work(ehci);
233
234 /* Unlike other USB host controller types, EHCI doesn't have
235 * any notion of "global" or bus-wide suspend. The driver has
236 * to manually suspend all the active unsuspended ports, and
237 * then manually resume them in the bus_resume() routine.
238 */
239 ehci->bus_suspended = 0;
240 ehci->owned_ports = 0;
241 changed = 0;
242 port = HCS_N_PORTS(ehci->hcs_params);
243 while (port--) {
244 u32 __iomem *reg = &ehci->regs->port_status [port];
245 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
246 u32 t2 = t1 & ~PORT_WAKE_BITS;
247
248 /* keep track of which ports we suspend */
249 if (t1 & PORT_OWNER)
250 set_bit(port, &ehci->owned_ports);
251 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
252 t2 |= PORT_SUSPEND;
253 set_bit(port, &ehci->bus_suspended);
254 }
255
256 /* enable remote wakeup on all ports, if told to do so */
257 if (hcd->self.root_hub->do_remote_wakeup) {
258 /* only enable appropriate wake bits, otherwise the
259 * hardware can not go phy low power mode. If a race
260 * condition happens here(connection change during bits
261 * set), the port change detection will finally fix it.
262 */
263 if (t1 & PORT_CONNECT)
264 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
265 else
266 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
267 }
268
269 if (t1 != t2) {
270 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
271 port + 1, t1, t2);
272 ehci_writel(ehci, t2, reg);
273 changed = 1;
274 }
275 }
276
277 if (changed && ehci->has_hostpc) {
278 spin_unlock_irq(&ehci->lock);
279 msleep(5); /* 5 ms for HCD to enter low-power mode */
280 spin_lock_irq(&ehci->lock);
281
282 port = HCS_N_PORTS(ehci->hcs_params);
283 while (port--) {
284 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
285 u32 t3;
286
287 t3 = ehci_readl(ehci, hostpc_reg);
288 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
289 t3 = ehci_readl(ehci, hostpc_reg);
290 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
291 port, (t3 & HOSTPC_PHCD) ?
292 "succeeded" : "failed");
293 }
294 }
295
296 /* Apparently some devices need a >= 1-uframe delay here */
297 if (ehci->bus_suspended)
298 udelay(150);
299
300 /* turn off now-idle HC */
301 ehci_halt (ehci);
302 ehci->rh_state = EHCI_RH_SUSPENDED;
303
304 if (ehci->reclaim)
305 end_unlink_async(ehci);
306
307 /* allow remote wakeup */
308 mask = INTR_MASK;
309 if (!hcd->self.root_hub->do_remote_wakeup)
310 mask &= ~STS_PCD;
311 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
312 ehci_readl(ehci, &ehci->regs->intr_enable);
313
314 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
315 spin_unlock_irq (&ehci->lock);
316
317 /* ehci_work() may have re-enabled the watchdog timer, which we do not
318 * want, and so we must delete any pending watchdog timer events.
319 */
320 del_timer_sync(&ehci->watchdog);
321 return 0;
322 }
323
324
325 /* caller has locked the root hub, and should reset/reinit on error */
326 static int ehci_bus_resume (struct usb_hcd *hcd)
327 {
328 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
329 u32 temp;
330 u32 power_okay;
331 int i;
332 unsigned long resume_needed = 0;
333
334 if (time_before (jiffies, ehci->next_statechange))
335 msleep(5);
336 spin_lock_irq (&ehci->lock);
337 if (!HCD_HW_ACCESSIBLE(hcd)) {
338 spin_unlock_irq(&ehci->lock);
339 return -ESHUTDOWN;
340 }
341
342 if (unlikely(ehci->debug)) {
343 if (!dbgp_reset_prep())
344 ehci->debug = NULL;
345 else
346 dbgp_external_startup();
347 }
348
349 /* Ideally and we've got a real resume here, and no port's power
350 * was lost. (For PCI, that means Vaux was maintained.) But we
351 * could instead be restoring a swsusp snapshot -- so that BIOS was
352 * the last user of the controller, not reset/pm hardware keeping
353 * state we gave to it.
354 */
355 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
356 ehci_dbg(ehci, "resume root hub%s\n",
357 power_okay ? "" : " after power loss");
358
359 /* at least some APM implementations will try to deliver
360 * IRQs right away, so delay them until we're ready.
361 */
362 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
363
364 /* re-init operational registers */
365 ehci_writel(ehci, 0, &ehci->regs->segment);
366 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
367 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
368
369 /* restore CMD_RUN, framelist size, and irq threshold */
370 ehci->command |= CMD_RUN;
371 ehci_writel(ehci, ehci->command, &ehci->regs->command);
372 ehci->rh_state = EHCI_RH_RUNNING;
373
374 /* Some controller/firmware combinations need a delay during which
375 * they set up the port statuses. See Bugzilla #8190. */
376 spin_unlock_irq(&ehci->lock);
377 msleep(8);
378 spin_lock_irq(&ehci->lock);
379
380 /* clear phy low-power mode before resume */
381 if (ehci->bus_suspended && ehci->has_hostpc) {
382 i = HCS_N_PORTS(ehci->hcs_params);
383 while (i--) {
384 if (test_bit(i, &ehci->bus_suspended)) {
385 u32 __iomem *hostpc_reg =
386 &ehci->regs->hostpc[i];
387
388 temp = ehci_readl(ehci, hostpc_reg);
389 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
390 hostpc_reg);
391 }
392 }
393 spin_unlock_irq(&ehci->lock);
394 msleep(5);
395 spin_lock_irq(&ehci->lock);
396 }
397
398 /* manually resume the ports we suspended during bus_suspend() */
399 i = HCS_N_PORTS (ehci->hcs_params);
400 while (i--) {
401 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
402 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
403 if (test_bit(i, &ehci->bus_suspended) &&
404 (temp & PORT_SUSPEND)) {
405 temp |= PORT_RESUME;
406 set_bit(i, &resume_needed);
407 }
408 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
409 }
410
411 /* msleep for 20ms only if code is trying to resume port */
412 if (resume_needed) {
413 spin_unlock_irq(&ehci->lock);
414 msleep(20);
415 spin_lock_irq(&ehci->lock);
416 }
417
418 i = HCS_N_PORTS (ehci->hcs_params);
419 while (i--) {
420 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
421 if (test_bit(i, &resume_needed)) {
422 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
423 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
424 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
425 }
426 }
427 (void) ehci_readl(ehci, &ehci->regs->command);
428
429 /* maybe re-activate the schedule(s) */
430 temp = 0;
431 if (ehci->async->qh_next.qh)
432 temp |= CMD_ASE;
433 if (ehci->periodic_sched)
434 temp |= CMD_PSE;
435 if (temp) {
436 ehci->command |= temp;
437 ehci_writel(ehci, ehci->command, &ehci->regs->command);
438 }
439
440 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
441
442 /* Now we can safely re-enable irqs */
443 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
444
445 spin_unlock_irq (&ehci->lock);
446 ehci_handover_companion_ports(ehci);
447 return 0;
448 }
449
450 #else
451
452 #define ehci_bus_suspend NULL
453 #define ehci_bus_resume NULL
454
455 #endif /* CONFIG_PM */
456
457 /*-------------------------------------------------------------------------*/
458
459 /*
460 * Sets the owner of a port
461 */
462 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
463 {
464 u32 __iomem *status_reg;
465 u32 port_status;
466 int try;
467
468 status_reg = &ehci->regs->port_status[portnum];
469
470 /*
471 * The controller won't set the OWNER bit if the port is
472 * enabled, so this loop will sometimes require at least two
473 * iterations: one to disable the port and one to set OWNER.
474 */
475 for (try = 4; try > 0; --try) {
476 spin_lock_irq(&ehci->lock);
477 port_status = ehci_readl(ehci, status_reg);
478 if ((port_status & PORT_OWNER) == new_owner
479 || (port_status & (PORT_OWNER | PORT_CONNECT))
480 == 0)
481 try = 0;
482 else {
483 port_status ^= PORT_OWNER;
484 port_status &= ~(PORT_PE | PORT_RWC_BITS);
485 ehci_writel(ehci, port_status, status_reg);
486 }
487 spin_unlock_irq(&ehci->lock);
488 if (try > 1)
489 msleep(5);
490 }
491 }
492
493 /*-------------------------------------------------------------------------*/
494
495 static int check_reset_complete (
496 struct ehci_hcd *ehci,
497 int index,
498 u32 __iomem *status_reg,
499 int port_status
500 ) {
501 if (!(port_status & PORT_CONNECT))
502 return port_status;
503
504 /* if reset finished and it's still not enabled -- handoff */
505 if (!(port_status & PORT_PE)) {
506
507 /* with integrated TT, there's nobody to hand it to! */
508 if (ehci_is_TDI(ehci)) {
509 ehci_dbg (ehci,
510 "Failed to enable port %d on root hub TT\n",
511 index+1);
512 return port_status;
513 }
514
515 ehci_dbg (ehci, "port %d full speed --> companion\n",
516 index + 1);
517
518 // what happens if HCS_N_CC(params) == 0 ?
519 port_status |= PORT_OWNER;
520 port_status &= ~PORT_RWC_BITS;
521 ehci_writel(ehci, port_status, status_reg);
522
523 /* ensure 440EPX ohci controller state is operational */
524 if (ehci->has_amcc_usb23)
525 set_ohci_hcfs(ehci, 1);
526 } else {
527 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
528 index + 1);
529 /* ensure 440EPx ohci controller state is suspended */
530 if (ehci->has_amcc_usb23)
531 set_ohci_hcfs(ehci, 0);
532 }
533
534 return port_status;
535 }
536
537 /*-------------------------------------------------------------------------*/
538
539
540 /* build "status change" packet (one or two bytes) from HC registers */
541
542 static int
543 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
544 {
545 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
546 u32 temp, status;
547 u32 mask;
548 int ports, i, retval = 1;
549 unsigned long flags;
550 u32 ppcd = 0;
551
552 /* init status to no-changes */
553 buf [0] = 0;
554 ports = HCS_N_PORTS (ehci->hcs_params);
555 if (ports > 7) {
556 buf [1] = 0;
557 retval++;
558 }
559
560 /* Inform the core about resumes-in-progress by returning
561 * a non-zero value even if there are no status changes.
562 */
563 status = ehci->resuming_ports;
564
565 /* Some boards (mostly VIA?) report bogus overcurrent indications,
566 * causing massive log spam unless we completely ignore them. It
567 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
568 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
569 * PORT_POWER; that's surprising, but maybe within-spec.
570 */
571 if (!ignore_oc)
572 mask = PORT_CSC | PORT_PEC | PORT_OCC;
573 else
574 mask = PORT_CSC | PORT_PEC;
575 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
576
577 /* no hub change reports (bit 0) for now (power, ...) */
578
579 /* port N changes (bit N)? */
580 spin_lock_irqsave (&ehci->lock, flags);
581
582 /* get per-port change detect bits */
583 if (ehci->has_ppcd)
584 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
585
586 for (i = 0; i < ports; i++) {
587 /* leverage per-port change bits feature */
588 if (ehci->has_ppcd && !(ppcd & (1 << i)))
589 continue;
590 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
591
592 /*
593 * Return status information even for ports with OWNER set.
594 * Otherwise khubd wouldn't see the disconnect event when a
595 * high-speed device is switched over to the companion
596 * controller by the user.
597 */
598
599 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
600 || (ehci->reset_done[i] && time_after_eq(
601 jiffies, ehci->reset_done[i]))) {
602 if (i < 7)
603 buf [0] |= 1 << (i + 1);
604 else
605 buf [1] |= 1 << (i - 7);
606 status = STS_PCD;
607 }
608 }
609 /* FIXME autosuspend idle root hubs */
610 spin_unlock_irqrestore (&ehci->lock, flags);
611 return status ? retval : 0;
612 }
613
614 /*-------------------------------------------------------------------------*/
615
616 static void
617 ehci_hub_descriptor (
618 struct ehci_hcd *ehci,
619 struct usb_hub_descriptor *desc
620 ) {
621 int ports = HCS_N_PORTS (ehci->hcs_params);
622 u16 temp;
623
624 desc->bDescriptorType = 0x29;
625 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
626 desc->bHubContrCurrent = 0;
627
628 desc->bNbrPorts = ports;
629 temp = 1 + (ports / 8);
630 desc->bDescLength = 7 + 2 * temp;
631
632 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
633 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
634 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
635
636 temp = 0x0008; /* per-port overcurrent reporting */
637 if (HCS_PPC (ehci->hcs_params))
638 temp |= 0x0001; /* per-port power control */
639 else
640 temp |= 0x0002; /* no power switching */
641 #if 0
642 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
643 if (HCS_INDICATOR (ehci->hcs_params))
644 temp |= 0x0080; /* per-port indicators (LEDs) */
645 #endif
646 desc->wHubCharacteristics = cpu_to_le16(temp);
647 }
648
649 /*-------------------------------------------------------------------------*/
650
651 static int ehci_hub_control (
652 struct usb_hcd *hcd,
653 u16 typeReq,
654 u16 wValue,
655 u16 wIndex,
656 char *buf,
657 u16 wLength
658 ) {
659 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
660 int ports = HCS_N_PORTS (ehci->hcs_params);
661 u32 __iomem *status_reg = &ehci->regs->port_status[
662 (wIndex & 0xff) - 1];
663 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
664 u32 temp, temp1, status;
665 unsigned long flags;
666 int retval = 0;
667 unsigned selector;
668
669 /*
670 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
671 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
672 * (track current state ourselves) ... blink for diagnostics,
673 * power, "this is the one", etc. EHCI spec supports this.
674 */
675
676 spin_lock_irqsave (&ehci->lock, flags);
677 switch (typeReq) {
678 case ClearHubFeature:
679 switch (wValue) {
680 case C_HUB_LOCAL_POWER:
681 case C_HUB_OVER_CURRENT:
682 /* no hub-wide feature/status flags */
683 break;
684 default:
685 goto error;
686 }
687 break;
688 case ClearPortFeature:
689 if (!wIndex || wIndex > ports)
690 goto error;
691 wIndex--;
692 temp = ehci_readl(ehci, status_reg);
693 temp &= ~PORT_RWC_BITS;
694
695 /*
696 * Even if OWNER is set, so the port is owned by the
697 * companion controller, khubd needs to be able to clear
698 * the port-change status bits (especially
699 * USB_PORT_STAT_C_CONNECTION).
700 */
701
702 switch (wValue) {
703 case USB_PORT_FEAT_ENABLE:
704 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
705 break;
706 case USB_PORT_FEAT_C_ENABLE:
707 ehci_writel(ehci, temp | PORT_PEC, status_reg);
708 break;
709 case USB_PORT_FEAT_SUSPEND:
710 if (temp & PORT_RESET)
711 goto error;
712 if (ehci->no_selective_suspend)
713 break;
714 #ifdef CONFIG_USB_OTG
715 if ((hcd->self.otg_port == (wIndex + 1))
716 && hcd->self.b_hnp_enable) {
717 otg_start_hnp(hcd->phy->otg);
718 break;
719 }
720 #endif
721 if (!(temp & PORT_SUSPEND))
722 break;
723 if ((temp & PORT_PE) == 0)
724 goto error;
725
726 /* clear phy low-power mode before resume */
727 if (ehci->has_hostpc) {
728 temp1 = ehci_readl(ehci, hostpc_reg);
729 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
730 hostpc_reg);
731 spin_unlock_irqrestore(&ehci->lock, flags);
732 msleep(5);/* wait to leave low-power mode */
733 spin_lock_irqsave(&ehci->lock, flags);
734 }
735 /* resume signaling for 20 msec */
736 temp &= ~PORT_WAKE_BITS;
737 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
738 ehci->reset_done[wIndex] = jiffies
739 + msecs_to_jiffies(20);
740 break;
741 case USB_PORT_FEAT_C_SUSPEND:
742 clear_bit(wIndex, &ehci->port_c_suspend);
743 break;
744 case USB_PORT_FEAT_POWER:
745 if (HCS_PPC (ehci->hcs_params))
746 ehci_writel(ehci, temp & ~PORT_POWER,
747 status_reg);
748 break;
749 case USB_PORT_FEAT_C_CONNECTION:
750 if (ehci->has_lpm) {
751 /* clear PORTSC bits on disconnect */
752 temp &= ~PORT_LPM;
753 temp &= ~PORT_DEV_ADDR;
754 }
755 ehci_writel(ehci, temp | PORT_CSC, status_reg);
756 break;
757 case USB_PORT_FEAT_C_OVER_CURRENT:
758 ehci_writel(ehci, temp | PORT_OCC, status_reg);
759 break;
760 case USB_PORT_FEAT_C_RESET:
761 /* GetPortStatus clears reset */
762 break;
763 default:
764 goto error;
765 }
766 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
767 break;
768 case GetHubDescriptor:
769 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
770 buf);
771 break;
772 case GetHubStatus:
773 /* no hub-wide feature/status flags */
774 memset (buf, 0, 4);
775 //cpu_to_le32s ((u32 *) buf);
776 break;
777 case GetPortStatus:
778 if (!wIndex || wIndex > ports)
779 goto error;
780 wIndex--;
781 status = 0;
782 temp = ehci_readl(ehci, status_reg);
783
784 // wPortChange bits
785 if (temp & PORT_CSC)
786 status |= USB_PORT_STAT_C_CONNECTION << 16;
787 if (temp & PORT_PEC)
788 status |= USB_PORT_STAT_C_ENABLE << 16;
789
790 if ((temp & PORT_OCC) && !ignore_oc){
791 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
792
793 /*
794 * Hubs should disable port power on over-current.
795 * However, not all EHCI implementations do this
796 * automatically, even if they _do_ support per-port
797 * power switching; they're allowed to just limit the
798 * current. khubd will turn the power back on.
799 */
800 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
801 ehci_writel(ehci,
802 temp & ~(PORT_RWC_BITS | PORT_POWER),
803 status_reg);
804 temp = ehci_readl(ehci, status_reg);
805 }
806 }
807
808 /* whoever resumes must GetPortStatus to complete it!! */
809 if (temp & PORT_RESUME) {
810
811 /* Remote Wakeup received? */
812 if (!ehci->reset_done[wIndex]) {
813 /* resume signaling for 20 msec */
814 ehci->reset_done[wIndex] = jiffies
815 + msecs_to_jiffies(20);
816 /* check the port again */
817 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
818 ehci->reset_done[wIndex]);
819 }
820
821 /* resume completed? */
822 else if (time_after_eq(jiffies,
823 ehci->reset_done[wIndex])) {
824 clear_bit(wIndex, &ehci->suspended_ports);
825 set_bit(wIndex, &ehci->port_c_suspend);
826 ehci->reset_done[wIndex] = 0;
827
828 /* stop resume signaling */
829 temp = ehci_readl(ehci, status_reg);
830 ehci_writel(ehci,
831 temp & ~(PORT_RWC_BITS | PORT_RESUME),
832 status_reg);
833 clear_bit(wIndex, &ehci->resuming_ports);
834 retval = handshake(ehci, status_reg,
835 PORT_RESUME, 0, 2000 /* 2msec */);
836 if (retval != 0) {
837 ehci_err(ehci,
838 "port %d resume error %d\n",
839 wIndex + 1, retval);
840 goto error;
841 }
842 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
843 }
844 }
845
846 /* whoever resets must GetPortStatus to complete it!! */
847 if ((temp & PORT_RESET)
848 && time_after_eq(jiffies,
849 ehci->reset_done[wIndex])) {
850 status |= USB_PORT_STAT_C_RESET << 16;
851 ehci->reset_done [wIndex] = 0;
852 clear_bit(wIndex, &ehci->resuming_ports);
853
854 /* force reset to complete */
855 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
856 status_reg);
857 /* REVISIT: some hardware needs 550+ usec to clear
858 * this bit; seems too long to spin routinely...
859 */
860 retval = handshake(ehci, status_reg,
861 PORT_RESET, 0, 1000);
862 if (retval != 0) {
863 ehci_err (ehci, "port %d reset error %d\n",
864 wIndex + 1, retval);
865 goto error;
866 }
867
868 /* see what we found out */
869 temp = check_reset_complete (ehci, wIndex, status_reg,
870 ehci_readl(ehci, status_reg));
871 }
872
873 if (!(temp & (PORT_RESUME|PORT_RESET))) {
874 ehci->reset_done[wIndex] = 0;
875 clear_bit(wIndex, &ehci->resuming_ports);
876 }
877
878 /* transfer dedicated ports to the companion hc */
879 if ((temp & PORT_CONNECT) &&
880 test_bit(wIndex, &ehci->companion_ports)) {
881 temp &= ~PORT_RWC_BITS;
882 temp |= PORT_OWNER;
883 ehci_writel(ehci, temp, status_reg);
884 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
885 temp = ehci_readl(ehci, status_reg);
886 }
887
888 /*
889 * Even if OWNER is set, there's no harm letting khubd
890 * see the wPortStatus values (they should all be 0 except
891 * for PORT_POWER anyway).
892 */
893
894 if (temp & PORT_CONNECT) {
895 status |= USB_PORT_STAT_CONNECTION;
896 // status may be from integrated TT
897 if (ehci->has_hostpc) {
898 temp1 = ehci_readl(ehci, hostpc_reg);
899 status |= ehci_port_speed(ehci, temp1);
900 } else
901 status |= ehci_port_speed(ehci, temp);
902 }
903 if (temp & PORT_PE)
904 status |= USB_PORT_STAT_ENABLE;
905
906 /* maybe the port was unsuspended without our knowledge */
907 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
908 status |= USB_PORT_STAT_SUSPEND;
909 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
910 clear_bit(wIndex, &ehci->suspended_ports);
911 clear_bit(wIndex, &ehci->resuming_ports);
912 ehci->reset_done[wIndex] = 0;
913 if (temp & PORT_PE)
914 set_bit(wIndex, &ehci->port_c_suspend);
915 }
916
917 if (temp & PORT_OC)
918 status |= USB_PORT_STAT_OVERCURRENT;
919 if (temp & PORT_RESET)
920 status |= USB_PORT_STAT_RESET;
921 if (temp & PORT_POWER)
922 status |= USB_PORT_STAT_POWER;
923 if (test_bit(wIndex, &ehci->port_c_suspend))
924 status |= USB_PORT_STAT_C_SUSPEND << 16;
925
926 #ifndef VERBOSE_DEBUG
927 if (status & ~0xffff) /* only if wPortChange is interesting */
928 #endif
929 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
930 put_unaligned_le32(status, buf);
931 break;
932 case SetHubFeature:
933 switch (wValue) {
934 case C_HUB_LOCAL_POWER:
935 case C_HUB_OVER_CURRENT:
936 /* no hub-wide feature/status flags */
937 break;
938 default:
939 goto error;
940 }
941 break;
942 case SetPortFeature:
943 selector = wIndex >> 8;
944 wIndex &= 0xff;
945 if (unlikely(ehci->debug)) {
946 /* If the debug port is active any port
947 * feature requests should get denied */
948 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
949 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
950 retval = -ENODEV;
951 goto error_exit;
952 }
953 }
954 if (!wIndex || wIndex > ports)
955 goto error;
956 wIndex--;
957 temp = ehci_readl(ehci, status_reg);
958 if (temp & PORT_OWNER)
959 break;
960
961 temp &= ~PORT_RWC_BITS;
962 switch (wValue) {
963 case USB_PORT_FEAT_SUSPEND:
964 if (ehci->no_selective_suspend)
965 break;
966 if ((temp & PORT_PE) == 0
967 || (temp & PORT_RESET) != 0)
968 goto error;
969
970 /* After above check the port must be connected.
971 * Set appropriate bit thus could put phy into low power
972 * mode if we have hostpc feature
973 */
974 temp &= ~PORT_WKCONN_E;
975 temp |= PORT_WKDISC_E | PORT_WKOC_E;
976 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
977 if (ehci->has_hostpc) {
978 spin_unlock_irqrestore(&ehci->lock, flags);
979 msleep(5);/* 5ms for HCD enter low pwr mode */
980 spin_lock_irqsave(&ehci->lock, flags);
981 temp1 = ehci_readl(ehci, hostpc_reg);
982 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
983 hostpc_reg);
984 temp1 = ehci_readl(ehci, hostpc_reg);
985 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
986 wIndex, (temp1 & HOSTPC_PHCD) ?
987 "succeeded" : "failed");
988 }
989 set_bit(wIndex, &ehci->suspended_ports);
990 break;
991 case USB_PORT_FEAT_POWER:
992 if (HCS_PPC (ehci->hcs_params))
993 ehci_writel(ehci, temp | PORT_POWER,
994 status_reg);
995 break;
996 case USB_PORT_FEAT_RESET:
997 if (temp & PORT_RESUME)
998 goto error;
999 /* line status bits may report this as low speed,
1000 * which can be fine if this root hub has a
1001 * transaction translator built in.
1002 */
1003 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1004 && !ehci_is_TDI(ehci)
1005 && PORT_USB11 (temp)) {
1006 ehci_dbg (ehci,
1007 "port %d low speed --> companion\n",
1008 wIndex + 1);
1009 temp |= PORT_OWNER;
1010 } else {
1011 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1012 temp |= PORT_RESET;
1013 temp &= ~PORT_PE;
1014
1015 /*
1016 * caller must wait, then call GetPortStatus
1017 * usb 2.0 spec says 50 ms resets on root
1018 */
1019 ehci->reset_done [wIndex] = jiffies
1020 + msecs_to_jiffies (50);
1021 }
1022 ehci_writel(ehci, temp, status_reg);
1023 break;
1024
1025 /* For downstream facing ports (these): one hub port is put
1026 * into test mode according to USB2 11.24.2.13, then the hub
1027 * must be reset (which for root hub now means rmmod+modprobe,
1028 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1029 * about the EHCI-specific stuff.
1030 */
1031 case USB_PORT_FEAT_TEST:
1032 if (!selector || selector > 5)
1033 goto error;
1034 ehci_quiesce(ehci);
1035
1036 /* Put all enabled ports into suspend */
1037 while (ports--) {
1038 u32 __iomem *sreg =
1039 &ehci->regs->port_status[ports];
1040
1041 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1042 if (temp & PORT_PE)
1043 ehci_writel(ehci, temp | PORT_SUSPEND,
1044 sreg);
1045 }
1046 ehci_halt(ehci);
1047 temp = ehci_readl(ehci, status_reg);
1048 temp |= selector << 16;
1049 ehci_writel(ehci, temp, status_reg);
1050 break;
1051
1052 default:
1053 goto error;
1054 }
1055 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1056 break;
1057
1058 default:
1059 error:
1060 /* "stall" on error */
1061 retval = -EPIPE;
1062 }
1063 error_exit:
1064 spin_unlock_irqrestore (&ehci->lock, flags);
1065 return retval;
1066 }
1067
1068 static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
1069 int portnum)
1070 {
1071 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1072
1073 if (ehci_is_TDI(ehci))
1074 return;
1075 set_owner(ehci, --portnum, PORT_OWNER);
1076 }
1077
1078 static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
1079 int portnum)
1080 {
1081 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1082 u32 __iomem *reg;
1083
1084 if (ehci_is_TDI(ehci))
1085 return 0;
1086 reg = &ehci->regs->port_status[portnum - 1];
1087 return ehci_readl(ehci, reg) & PORT_OWNER;
1088 }
kernel source for telekom puls (alcatel/mediatek)