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Merge branches 'iommu/fixes', 'dma-debug', 'arm/omap', 'arm/tegra', 'core' and 'x86...
[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;
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 if (ehci->resuming_ports) {
227 spin_unlock_irq(&ehci->lock);
228 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
229 return -EBUSY;
230 }
231 }
232
233 /* stop schedules, clean any completed work */
234 if (ehci->rh_state == EHCI_RH_RUNNING)
235 ehci_quiesce (ehci);
236 ehci->command = ehci_readl(ehci, &ehci->regs->command);
237 ehci_work(ehci);
238
239 /* Unlike other USB host controller types, EHCI doesn't have
240 * any notion of "global" or bus-wide suspend. The driver has
241 * to manually suspend all the active unsuspended ports, and
242 * then manually resume them in the bus_resume() routine.
243 */
244 ehci->bus_suspended = 0;
245 ehci->owned_ports = 0;
246 changed = 0;
247 port = HCS_N_PORTS(ehci->hcs_params);
248 while (port--) {
249 u32 __iomem *reg = &ehci->regs->port_status [port];
250 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
251 u32 t2 = t1 & ~PORT_WAKE_BITS;
252
253 /* keep track of which ports we suspend */
254 if (t1 & PORT_OWNER)
255 set_bit(port, &ehci->owned_ports);
256 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
257 t2 |= PORT_SUSPEND;
258 set_bit(port, &ehci->bus_suspended);
259 }
260
261 /* enable remote wakeup on all ports, if told to do so */
262 if (hcd->self.root_hub->do_remote_wakeup) {
263 /* only enable appropriate wake bits, otherwise the
264 * hardware can not go phy low power mode. If a race
265 * condition happens here(connection change during bits
266 * set), the port change detection will finally fix it.
267 */
268 if (t1 & PORT_CONNECT)
269 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
270 else
271 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
272 }
273
274 if (t1 != t2) {
275 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
276 port + 1, t1, t2);
277 ehci_writel(ehci, t2, reg);
278 changed = 1;
279 }
280 }
281
282 if (changed && ehci->has_hostpc) {
283 spin_unlock_irq(&ehci->lock);
284 msleep(5); /* 5 ms for HCD to enter low-power mode */
285 spin_lock_irq(&ehci->lock);
286
287 port = HCS_N_PORTS(ehci->hcs_params);
288 while (port--) {
289 u32 __iomem *hostpc_reg;
290 u32 t3;
291
292 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
293 + HOSTPC0 + 4 * port);
294 t3 = ehci_readl(ehci, hostpc_reg);
295 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
296 t3 = ehci_readl(ehci, hostpc_reg);
297 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
298 port, (t3 & HOSTPC_PHCD) ?
299 "succeeded" : "failed");
300 }
301 }
302
303 /* Apparently some devices need a >= 1-uframe delay here */
304 if (ehci->bus_suspended)
305 udelay(150);
306
307 /* turn off now-idle HC */
308 ehci_halt (ehci);
309 ehci->rh_state = EHCI_RH_SUSPENDED;
310
311 if (ehci->reclaim)
312 end_unlink_async(ehci);
313
314 /* allow remote wakeup */
315 mask = INTR_MASK;
316 if (!hcd->self.root_hub->do_remote_wakeup)
317 mask &= ~STS_PCD;
318 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
319 ehci_readl(ehci, &ehci->regs->intr_enable);
320
321 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
322 spin_unlock_irq (&ehci->lock);
323
324 /* ehci_work() may have re-enabled the watchdog timer, which we do not
325 * want, and so we must delete any pending watchdog timer events.
326 */
327 del_timer_sync(&ehci->watchdog);
328 return 0;
329 }
330
331
332 /* caller has locked the root hub, and should reset/reinit on error */
333 static int ehci_bus_resume (struct usb_hcd *hcd)
334 {
335 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
336 u32 temp;
337 u32 power_okay;
338 int i;
339 unsigned long resume_needed = 0;
340
341 if (time_before (jiffies, ehci->next_statechange))
342 msleep(5);
343 spin_lock_irq (&ehci->lock);
344 if (!HCD_HW_ACCESSIBLE(hcd)) {
345 spin_unlock_irq(&ehci->lock);
346 return -ESHUTDOWN;
347 }
348
349 if (unlikely(ehci->debug)) {
350 if (!dbgp_reset_prep())
351 ehci->debug = NULL;
352 else
353 dbgp_external_startup();
354 }
355
356 /* Ideally and we've got a real resume here, and no port's power
357 * was lost. (For PCI, that means Vaux was maintained.) But we
358 * could instead be restoring a swsusp snapshot -- so that BIOS was
359 * the last user of the controller, not reset/pm hardware keeping
360 * state we gave to it.
361 */
362 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
363 ehci_dbg(ehci, "resume root hub%s\n",
364 power_okay ? "" : " after power loss");
365
366 /* at least some APM implementations will try to deliver
367 * IRQs right away, so delay them until we're ready.
368 */
369 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
370
371 /* re-init operational registers */
372 ehci_writel(ehci, 0, &ehci->regs->segment);
373 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
374 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
375
376 /* restore CMD_RUN, framelist size, and irq threshold */
377 ehci_writel(ehci, ehci->command, &ehci->regs->command);
378 ehci->rh_state = EHCI_RH_RUNNING;
379
380 /* Some controller/firmware combinations need a delay during which
381 * they set up the port statuses. See Bugzilla #8190. */
382 spin_unlock_irq(&ehci->lock);
383 msleep(8);
384 spin_lock_irq(&ehci->lock);
385
386 /* clear phy low-power mode before resume */
387 if (ehci->bus_suspended && ehci->has_hostpc) {
388 i = HCS_N_PORTS(ehci->hcs_params);
389 while (i--) {
390 if (test_bit(i, &ehci->bus_suspended)) {
391 u32 __iomem *hostpc_reg;
392
393 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
394 + HOSTPC0 + 4 * i);
395 temp = ehci_readl(ehci, hostpc_reg);
396 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
397 hostpc_reg);
398 }
399 }
400 spin_unlock_irq(&ehci->lock);
401 msleep(5);
402 spin_lock_irq(&ehci->lock);
403 }
404
405 /* manually resume the ports we suspended during bus_suspend() */
406 i = HCS_N_PORTS (ehci->hcs_params);
407 while (i--) {
408 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
409 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
410 if (test_bit(i, &ehci->bus_suspended) &&
411 (temp & PORT_SUSPEND)) {
412 temp |= PORT_RESUME;
413 set_bit(i, &resume_needed);
414 }
415 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
416 }
417
418 /* msleep for 20ms only if code is trying to resume port */
419 if (resume_needed) {
420 spin_unlock_irq(&ehci->lock);
421 msleep(20);
422 spin_lock_irq(&ehci->lock);
423 }
424
425 i = HCS_N_PORTS (ehci->hcs_params);
426 while (i--) {
427 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
428 if (test_bit(i, &resume_needed)) {
429 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
430 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
431 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
432 }
433 }
434 (void) ehci_readl(ehci, &ehci->regs->command);
435
436 /* maybe re-activate the schedule(s) */
437 temp = 0;
438 if (ehci->async->qh_next.qh)
439 temp |= CMD_ASE;
440 if (ehci->periodic_sched)
441 temp |= CMD_PSE;
442 if (temp) {
443 ehci->command |= temp;
444 ehci_writel(ehci, ehci->command, &ehci->regs->command);
445 }
446
447 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
448
449 /* Now we can safely re-enable irqs */
450 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
451
452 spin_unlock_irq (&ehci->lock);
453 ehci_handover_companion_ports(ehci);
454 return 0;
455 }
456
457 #else
458
459 #define ehci_bus_suspend NULL
460 #define ehci_bus_resume NULL
461
462 #endif /* CONFIG_PM */
463
464 /*-------------------------------------------------------------------------*/
465
466 /*
467 * Sets the owner of a port
468 */
469 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
470 {
471 u32 __iomem *status_reg;
472 u32 port_status;
473 int try;
474
475 status_reg = &ehci->regs->port_status[portnum];
476
477 /*
478 * The controller won't set the OWNER bit if the port is
479 * enabled, so this loop will sometimes require at least two
480 * iterations: one to disable the port and one to set OWNER.
481 */
482 for (try = 4; try > 0; --try) {
483 spin_lock_irq(&ehci->lock);
484 port_status = ehci_readl(ehci, status_reg);
485 if ((port_status & PORT_OWNER) == new_owner
486 || (port_status & (PORT_OWNER | PORT_CONNECT))
487 == 0)
488 try = 0;
489 else {
490 port_status ^= PORT_OWNER;
491 port_status &= ~(PORT_PE | PORT_RWC_BITS);
492 ehci_writel(ehci, port_status, status_reg);
493 }
494 spin_unlock_irq(&ehci->lock);
495 if (try > 1)
496 msleep(5);
497 }
498 }
499
500 /*-------------------------------------------------------------------------*/
501
502 static int check_reset_complete (
503 struct ehci_hcd *ehci,
504 int index,
505 u32 __iomem *status_reg,
506 int port_status
507 ) {
508 if (!(port_status & PORT_CONNECT))
509 return port_status;
510
511 /* if reset finished and it's still not enabled -- handoff */
512 if (!(port_status & PORT_PE)) {
513
514 /* with integrated TT, there's nobody to hand it to! */
515 if (ehci_is_TDI(ehci)) {
516 ehci_dbg (ehci,
517 "Failed to enable port %d on root hub TT\n",
518 index+1);
519 return port_status;
520 }
521
522 ehci_dbg (ehci, "port %d full speed --> companion\n",
523 index + 1);
524
525 // what happens if HCS_N_CC(params) == 0 ?
526 port_status |= PORT_OWNER;
527 port_status &= ~PORT_RWC_BITS;
528 ehci_writel(ehci, port_status, status_reg);
529
530 /* ensure 440EPX ohci controller state is operational */
531 if (ehci->has_amcc_usb23)
532 set_ohci_hcfs(ehci, 1);
533 } else {
534 ehci_dbg (ehci, "port %d high speed\n", index + 1);
535 /* ensure 440EPx ohci controller state is suspended */
536 if (ehci->has_amcc_usb23)
537 set_ohci_hcfs(ehci, 0);
538 }
539
540 return port_status;
541 }
542
543 /*-------------------------------------------------------------------------*/
544
545
546 /* build "status change" packet (one or two bytes) from HC registers */
547
548 static int
549 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
550 {
551 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
552 u32 temp, status;
553 u32 mask;
554 int ports, i, retval = 1;
555 unsigned long flags;
556 u32 ppcd = 0;
557
558 /* init status to no-changes */
559 buf [0] = 0;
560 ports = HCS_N_PORTS (ehci->hcs_params);
561 if (ports > 7) {
562 buf [1] = 0;
563 retval++;
564 }
565
566 /* Inform the core about resumes-in-progress by returning
567 * a non-zero value even if there are no status changes.
568 */
569 status = ehci->resuming_ports;
570
571 /* Some boards (mostly VIA?) report bogus overcurrent indications,
572 * causing massive log spam unless we completely ignore them. It
573 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
574 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
575 * PORT_POWER; that's surprising, but maybe within-spec.
576 */
577 if (!ignore_oc)
578 mask = PORT_CSC | PORT_PEC | PORT_OCC;
579 else
580 mask = PORT_CSC | PORT_PEC;
581 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
582
583 /* no hub change reports (bit 0) for now (power, ...) */
584
585 /* port N changes (bit N)? */
586 spin_lock_irqsave (&ehci->lock, flags);
587
588 /* get per-port change detect bits */
589 if (ehci->has_ppcd)
590 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
591
592 for (i = 0; i < ports; i++) {
593 /* leverage per-port change bits feature */
594 if (ehci->has_ppcd && !(ppcd & (1 << i)))
595 continue;
596 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
597
598 /*
599 * Return status information even for ports with OWNER set.
600 * Otherwise khubd wouldn't see the disconnect event when a
601 * high-speed device is switched over to the companion
602 * controller by the user.
603 */
604
605 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
606 || (ehci->reset_done[i] && time_after_eq(
607 jiffies, ehci->reset_done[i]))) {
608 if (i < 7)
609 buf [0] |= 1 << (i + 1);
610 else
611 buf [1] |= 1 << (i - 7);
612 status = STS_PCD;
613 }
614 }
615 /* FIXME autosuspend idle root hubs */
616 spin_unlock_irqrestore (&ehci->lock, flags);
617 return status ? retval : 0;
618 }
619
620 /*-------------------------------------------------------------------------*/
621
622 static void
623 ehci_hub_descriptor (
624 struct ehci_hcd *ehci,
625 struct usb_hub_descriptor *desc
626 ) {
627 int ports = HCS_N_PORTS (ehci->hcs_params);
628 u16 temp;
629
630 desc->bDescriptorType = 0x29;
631 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
632 desc->bHubContrCurrent = 0;
633
634 desc->bNbrPorts = ports;
635 temp = 1 + (ports / 8);
636 desc->bDescLength = 7 + 2 * temp;
637
638 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
639 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
640 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
641
642 temp = 0x0008; /* per-port overcurrent reporting */
643 if (HCS_PPC (ehci->hcs_params))
644 temp |= 0x0001; /* per-port power control */
645 else
646 temp |= 0x0002; /* no power switching */
647 #if 0
648 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
649 if (HCS_INDICATOR (ehci->hcs_params))
650 temp |= 0x0080; /* per-port indicators (LEDs) */
651 #endif
652 desc->wHubCharacteristics = cpu_to_le16(temp);
653 }
654
655 /*-------------------------------------------------------------------------*/
656
657 static int ehci_hub_control (
658 struct usb_hcd *hcd,
659 u16 typeReq,
660 u16 wValue,
661 u16 wIndex,
662 char *buf,
663 u16 wLength
664 ) {
665 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
666 int ports = HCS_N_PORTS (ehci->hcs_params);
667 u32 __iomem *status_reg = &ehci->regs->port_status[
668 (wIndex & 0xff) - 1];
669 u32 __iomem *hostpc_reg = NULL;
670 u32 temp, temp1, status;
671 unsigned long flags;
672 int retval = 0;
673 unsigned selector;
674
675 /*
676 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
677 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
678 * (track current state ourselves) ... blink for diagnostics,
679 * power, "this is the one", etc. EHCI spec supports this.
680 */
681
682 if (ehci->has_hostpc)
683 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
684 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
685 spin_lock_irqsave (&ehci->lock, flags);
686 switch (typeReq) {
687 case ClearHubFeature:
688 switch (wValue) {
689 case C_HUB_LOCAL_POWER:
690 case C_HUB_OVER_CURRENT:
691 /* no hub-wide feature/status flags */
692 break;
693 default:
694 goto error;
695 }
696 break;
697 case ClearPortFeature:
698 if (!wIndex || wIndex > ports)
699 goto error;
700 wIndex--;
701 temp = ehci_readl(ehci, status_reg);
702
703 /*
704 * Even if OWNER is set, so the port is owned by the
705 * companion controller, khubd needs to be able to clear
706 * the port-change status bits (especially
707 * USB_PORT_STAT_C_CONNECTION).
708 */
709
710 switch (wValue) {
711 case USB_PORT_FEAT_ENABLE:
712 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
713 break;
714 case USB_PORT_FEAT_C_ENABLE:
715 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
716 status_reg);
717 break;
718 case USB_PORT_FEAT_SUSPEND:
719 if (temp & PORT_RESET)
720 goto error;
721 if (ehci->no_selective_suspend)
722 break;
723 #ifdef CONFIG_USB_OTG
724 if ((hcd->self.otg_port == (wIndex + 1))
725 && hcd->self.b_hnp_enable) {
726 otg_start_hnp(ehci->transceiver->otg);
727 break;
728 }
729 #endif
730 if (!(temp & PORT_SUSPEND))
731 break;
732 if ((temp & PORT_PE) == 0)
733 goto error;
734
735 /* clear phy low-power mode before resume */
736 if (hostpc_reg) {
737 temp1 = ehci_readl(ehci, hostpc_reg);
738 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
739 hostpc_reg);
740 spin_unlock_irqrestore(&ehci->lock, flags);
741 msleep(5);/* wait to leave low-power mode */
742 spin_lock_irqsave(&ehci->lock, flags);
743 }
744 /* resume signaling for 20 msec */
745 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
746 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
747 ehci->reset_done[wIndex] = jiffies
748 + msecs_to_jiffies(20);
749 break;
750 case USB_PORT_FEAT_C_SUSPEND:
751 clear_bit(wIndex, &ehci->port_c_suspend);
752 break;
753 case USB_PORT_FEAT_POWER:
754 if (HCS_PPC (ehci->hcs_params))
755 ehci_writel(ehci,
756 temp & ~(PORT_RWC_BITS | PORT_POWER),
757 status_reg);
758 break;
759 case USB_PORT_FEAT_C_CONNECTION:
760 if (ehci->has_lpm) {
761 /* clear PORTSC bits on disconnect */
762 temp &= ~PORT_LPM;
763 temp &= ~PORT_DEV_ADDR;
764 }
765 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
766 status_reg);
767 break;
768 case USB_PORT_FEAT_C_OVER_CURRENT:
769 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
770 status_reg);
771 break;
772 case USB_PORT_FEAT_C_RESET:
773 /* GetPortStatus clears reset */
774 break;
775 default:
776 goto error;
777 }
778 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
779 break;
780 case GetHubDescriptor:
781 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
782 buf);
783 break;
784 case GetHubStatus:
785 /* no hub-wide feature/status flags */
786 memset (buf, 0, 4);
787 //cpu_to_le32s ((u32 *) buf);
788 break;
789 case GetPortStatus:
790 if (!wIndex || wIndex > ports)
791 goto error;
792 wIndex--;
793 status = 0;
794 temp = ehci_readl(ehci, status_reg);
795
796 // wPortChange bits
797 if (temp & PORT_CSC)
798 status |= USB_PORT_STAT_C_CONNECTION << 16;
799 if (temp & PORT_PEC)
800 status |= USB_PORT_STAT_C_ENABLE << 16;
801
802 if ((temp & PORT_OCC) && !ignore_oc){
803 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
804
805 /*
806 * Hubs should disable port power on over-current.
807 * However, not all EHCI implementations do this
808 * automatically, even if they _do_ support per-port
809 * power switching; they're allowed to just limit the
810 * current. khubd will turn the power back on.
811 */
812 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
813 ehci_writel(ehci,
814 temp & ~(PORT_RWC_BITS | PORT_POWER),
815 status_reg);
816 temp = ehci_readl(ehci, status_reg);
817 }
818 }
819
820 /* whoever resumes must GetPortStatus to complete it!! */
821 if (temp & PORT_RESUME) {
822
823 /* Remote Wakeup received? */
824 if (!ehci->reset_done[wIndex]) {
825 /* resume signaling for 20 msec */
826 ehci->reset_done[wIndex] = jiffies
827 + msecs_to_jiffies(20);
828 /* check the port again */
829 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
830 ehci->reset_done[wIndex]);
831 }
832
833 /* resume completed? */
834 else if (time_after_eq(jiffies,
835 ehci->reset_done[wIndex])) {
836 clear_bit(wIndex, &ehci->suspended_ports);
837 set_bit(wIndex, &ehci->port_c_suspend);
838 ehci->reset_done[wIndex] = 0;
839
840 /* stop resume signaling */
841 temp = ehci_readl(ehci, status_reg);
842 ehci_writel(ehci,
843 temp & ~(PORT_RWC_BITS | PORT_RESUME),
844 status_reg);
845 clear_bit(wIndex, &ehci->resuming_ports);
846 retval = handshake(ehci, status_reg,
847 PORT_RESUME, 0, 2000 /* 2msec */);
848 if (retval != 0) {
849 ehci_err(ehci,
850 "port %d resume error %d\n",
851 wIndex + 1, retval);
852 goto error;
853 }
854 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
855 }
856 }
857
858 /* whoever resets must GetPortStatus to complete it!! */
859 if ((temp & PORT_RESET)
860 && time_after_eq(jiffies,
861 ehci->reset_done[wIndex])) {
862 status |= USB_PORT_STAT_C_RESET << 16;
863 ehci->reset_done [wIndex] = 0;
864 clear_bit(wIndex, &ehci->resuming_ports);
865
866 /* force reset to complete */
867 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
868 status_reg);
869 /* REVISIT: some hardware needs 550+ usec to clear
870 * this bit; seems too long to spin routinely...
871 */
872 retval = handshake(ehci, status_reg,
873 PORT_RESET, 0, 1000);
874 if (retval != 0) {
875 ehci_err (ehci, "port %d reset error %d\n",
876 wIndex + 1, retval);
877 goto error;
878 }
879
880 /* see what we found out */
881 temp = check_reset_complete (ehci, wIndex, status_reg,
882 ehci_readl(ehci, status_reg));
883 }
884
885 if (!(temp & (PORT_RESUME|PORT_RESET))) {
886 ehci->reset_done[wIndex] = 0;
887 clear_bit(wIndex, &ehci->resuming_ports);
888 }
889
890 /* transfer dedicated ports to the companion hc */
891 if ((temp & PORT_CONNECT) &&
892 test_bit(wIndex, &ehci->companion_ports)) {
893 temp &= ~PORT_RWC_BITS;
894 temp |= PORT_OWNER;
895 ehci_writel(ehci, temp, status_reg);
896 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
897 temp = ehci_readl(ehci, status_reg);
898 }
899
900 /*
901 * Even if OWNER is set, there's no harm letting khubd
902 * see the wPortStatus values (they should all be 0 except
903 * for PORT_POWER anyway).
904 */
905
906 if (temp & PORT_CONNECT) {
907 status |= USB_PORT_STAT_CONNECTION;
908 // status may be from integrated TT
909 if (ehci->has_hostpc) {
910 temp1 = ehci_readl(ehci, hostpc_reg);
911 status |= ehci_port_speed(ehci, temp1);
912 } else
913 status |= ehci_port_speed(ehci, temp);
914 }
915 if (temp & PORT_PE)
916 status |= USB_PORT_STAT_ENABLE;
917
918 /* maybe the port was unsuspended without our knowledge */
919 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
920 status |= USB_PORT_STAT_SUSPEND;
921 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
922 clear_bit(wIndex, &ehci->suspended_ports);
923 clear_bit(wIndex, &ehci->resuming_ports);
924 ehci->reset_done[wIndex] = 0;
925 if (temp & PORT_PE)
926 set_bit(wIndex, &ehci->port_c_suspend);
927 }
928
929 if (temp & PORT_OC)
930 status |= USB_PORT_STAT_OVERCURRENT;
931 if (temp & PORT_RESET)
932 status |= USB_PORT_STAT_RESET;
933 if (temp & PORT_POWER)
934 status |= USB_PORT_STAT_POWER;
935 if (test_bit(wIndex, &ehci->port_c_suspend))
936 status |= USB_PORT_STAT_C_SUSPEND << 16;
937
938 #ifndef VERBOSE_DEBUG
939 if (status & ~0xffff) /* only if wPortChange is interesting */
940 #endif
941 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
942 put_unaligned_le32(status, buf);
943 break;
944 case SetHubFeature:
945 switch (wValue) {
946 case C_HUB_LOCAL_POWER:
947 case C_HUB_OVER_CURRENT:
948 /* no hub-wide feature/status flags */
949 break;
950 default:
951 goto error;
952 }
953 break;
954 case SetPortFeature:
955 selector = wIndex >> 8;
956 wIndex &= 0xff;
957 if (unlikely(ehci->debug)) {
958 /* If the debug port is active any port
959 * feature requests should get denied */
960 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
961 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
962 retval = -ENODEV;
963 goto error_exit;
964 }
965 }
966 if (!wIndex || wIndex > ports)
967 goto error;
968 wIndex--;
969 temp = ehci_readl(ehci, status_reg);
970 if (temp & PORT_OWNER)
971 break;
972
973 temp &= ~PORT_RWC_BITS;
974 switch (wValue) {
975 case USB_PORT_FEAT_SUSPEND:
976 if (ehci->no_selective_suspend)
977 break;
978 if ((temp & PORT_PE) == 0
979 || (temp & PORT_RESET) != 0)
980 goto error;
981
982 /* After above check the port must be connected.
983 * Set appropriate bit thus could put phy into low power
984 * mode if we have hostpc feature
985 */
986 temp &= ~PORT_WKCONN_E;
987 temp |= PORT_WKDISC_E | PORT_WKOC_E;
988 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
989 if (hostpc_reg) {
990 spin_unlock_irqrestore(&ehci->lock, flags);
991 msleep(5);/* 5ms for HCD enter low pwr mode */
992 spin_lock_irqsave(&ehci->lock, flags);
993 temp1 = ehci_readl(ehci, hostpc_reg);
994 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
995 hostpc_reg);
996 temp1 = ehci_readl(ehci, hostpc_reg);
997 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
998 wIndex, (temp1 & HOSTPC_PHCD) ?
999 "succeeded" : "failed");
1000 }
1001 set_bit(wIndex, &ehci->suspended_ports);
1002 break;
1003 case USB_PORT_FEAT_POWER:
1004 if (HCS_PPC (ehci->hcs_params))
1005 ehci_writel(ehci, temp | PORT_POWER,
1006 status_reg);
1007 break;
1008 case USB_PORT_FEAT_RESET:
1009 if (temp & PORT_RESUME)
1010 goto error;
1011 /* line status bits may report this as low speed,
1012 * which can be fine if this root hub has a
1013 * transaction translator built in.
1014 */
1015 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1016 && !ehci_is_TDI(ehci)
1017 && PORT_USB11 (temp)) {
1018 ehci_dbg (ehci,
1019 "port %d low speed --> companion\n",
1020 wIndex + 1);
1021 temp |= PORT_OWNER;
1022 } else {
1023 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1024 temp |= PORT_RESET;
1025 temp &= ~PORT_PE;
1026
1027 /*
1028 * caller must wait, then call GetPortStatus
1029 * usb 2.0 spec says 50 ms resets on root
1030 */
1031 ehci->reset_done [wIndex] = jiffies
1032 + msecs_to_jiffies (50);
1033 }
1034 ehci_writel(ehci, temp, status_reg);
1035 break;
1036
1037 /* For downstream facing ports (these): one hub port is put
1038 * into test mode according to USB2 11.24.2.13, then the hub
1039 * must be reset (which for root hub now means rmmod+modprobe,
1040 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1041 * about the EHCI-specific stuff.
1042 */
1043 case USB_PORT_FEAT_TEST:
1044 if (!selector || selector > 5)
1045 goto error;
1046 ehci_quiesce(ehci);
1047
1048 /* Put all enabled ports into suspend */
1049 while (ports--) {
1050 u32 __iomem *sreg =
1051 &ehci->regs->port_status[ports];
1052
1053 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1054 if (temp & PORT_PE)
1055 ehci_writel(ehci, temp | PORT_SUSPEND,
1056 sreg);
1057 }
1058 ehci_halt(ehci);
1059 temp = ehci_readl(ehci, status_reg);
1060 temp |= selector << 16;
1061 ehci_writel(ehci, temp, status_reg);
1062 break;
1063
1064 default:
1065 goto error;
1066 }
1067 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1068 break;
1069
1070 default:
1071 error:
1072 /* "stall" on error */
1073 retval = -EPIPE;
1074 }
1075 error_exit:
1076 spin_unlock_irqrestore (&ehci->lock, flags);
1077 return retval;
1078 }
1079
1080 static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
1081 int portnum)
1082 {
1083 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1084
1085 if (ehci_is_TDI(ehci))
1086 return;
1087 set_owner(ehci, --portnum, PORT_OWNER);
1088 }
1089
1090 static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
1091 int portnum)
1092 {
1093 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1094 u32 __iomem *reg;
1095
1096 if (ehci_is_TDI(ehci))
1097 return 0;
1098 reg = &ehci->regs->port_status[portnum - 1];
1099 return ehci_readl(ehci, reg) & PORT_OWNER;
1100 }
kernel source for telekom puls (alcatel/mediatek)