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USB: EHCI: rename "reclaim"
[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 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 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->async_unlink)
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
428 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
429
430 /* Now we can safely re-enable irqs */
431 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
432 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
433
434 spin_unlock_irq (&ehci->lock);
435 ehci_handover_companion_ports(ehci);
436 return 0;
437 }
438
439 #else
440
441 #define ehci_bus_suspend NULL
442 #define ehci_bus_resume NULL
443
444 #endif /* CONFIG_PM */
445
446 /*-------------------------------------------------------------------------*/
447
448 /*
449 * Sets the owner of a port
450 */
451 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
452 {
453 u32 __iomem *status_reg;
454 u32 port_status;
455 int try;
456
457 status_reg = &ehci->regs->port_status[portnum];
458
459 /*
460 * The controller won't set the OWNER bit if the port is
461 * enabled, so this loop will sometimes require at least two
462 * iterations: one to disable the port and one to set OWNER.
463 */
464 for (try = 4; try > 0; --try) {
465 spin_lock_irq(&ehci->lock);
466 port_status = ehci_readl(ehci, status_reg);
467 if ((port_status & PORT_OWNER) == new_owner
468 || (port_status & (PORT_OWNER | PORT_CONNECT))
469 == 0)
470 try = 0;
471 else {
472 port_status ^= PORT_OWNER;
473 port_status &= ~(PORT_PE | PORT_RWC_BITS);
474 ehci_writel(ehci, port_status, status_reg);
475 }
476 spin_unlock_irq(&ehci->lock);
477 if (try > 1)
478 msleep(5);
479 }
480 }
481
482 /*-------------------------------------------------------------------------*/
483
484 static int check_reset_complete (
485 struct ehci_hcd *ehci,
486 int index,
487 u32 __iomem *status_reg,
488 int port_status
489 ) {
490 if (!(port_status & PORT_CONNECT))
491 return port_status;
492
493 /* if reset finished and it's still not enabled -- handoff */
494 if (!(port_status & PORT_PE)) {
495
496 /* with integrated TT, there's nobody to hand it to! */
497 if (ehci_is_TDI(ehci)) {
498 ehci_dbg (ehci,
499 "Failed to enable port %d on root hub TT\n",
500 index+1);
501 return port_status;
502 }
503
504 ehci_dbg (ehci, "port %d full speed --> companion\n",
505 index + 1);
506
507 // what happens if HCS_N_CC(params) == 0 ?
508 port_status |= PORT_OWNER;
509 port_status &= ~PORT_RWC_BITS;
510 ehci_writel(ehci, port_status, status_reg);
511
512 /* ensure 440EPX ohci controller state is operational */
513 if (ehci->has_amcc_usb23)
514 set_ohci_hcfs(ehci, 1);
515 } else {
516 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
517 index + 1);
518 /* ensure 440EPx ohci controller state is suspended */
519 if (ehci->has_amcc_usb23)
520 set_ohci_hcfs(ehci, 0);
521 }
522
523 return port_status;
524 }
525
526 /*-------------------------------------------------------------------------*/
527
528
529 /* build "status change" packet (one or two bytes) from HC registers */
530
531 static int
532 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
533 {
534 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
535 u32 temp, status;
536 u32 mask;
537 int ports, i, retval = 1;
538 unsigned long flags;
539 u32 ppcd = 0;
540
541 /* init status to no-changes */
542 buf [0] = 0;
543 ports = HCS_N_PORTS (ehci->hcs_params);
544 if (ports > 7) {
545 buf [1] = 0;
546 retval++;
547 }
548
549 /* Inform the core about resumes-in-progress by returning
550 * a non-zero value even if there are no status changes.
551 */
552 status = ehci->resuming_ports;
553
554 /* Some boards (mostly VIA?) report bogus overcurrent indications,
555 * causing massive log spam unless we completely ignore them. It
556 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
557 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
558 * PORT_POWER; that's surprising, but maybe within-spec.
559 */
560 if (!ignore_oc)
561 mask = PORT_CSC | PORT_PEC | PORT_OCC;
562 else
563 mask = PORT_CSC | PORT_PEC;
564 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
565
566 /* no hub change reports (bit 0) for now (power, ...) */
567
568 /* port N changes (bit N)? */
569 spin_lock_irqsave (&ehci->lock, flags);
570
571 /* get per-port change detect bits */
572 if (ehci->has_ppcd)
573 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
574
575 for (i = 0; i < ports; i++) {
576 /* leverage per-port change bits feature */
577 if (ehci->has_ppcd && !(ppcd & (1 << i)))
578 continue;
579 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
580
581 /*
582 * Return status information even for ports with OWNER set.
583 * Otherwise khubd wouldn't see the disconnect event when a
584 * high-speed device is switched over to the companion
585 * controller by the user.
586 */
587
588 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
589 || (ehci->reset_done[i] && time_after_eq(
590 jiffies, ehci->reset_done[i]))) {
591 if (i < 7)
592 buf [0] |= 1 << (i + 1);
593 else
594 buf [1] |= 1 << (i - 7);
595 status = STS_PCD;
596 }
597 }
598 /* FIXME autosuspend idle root hubs */
599 spin_unlock_irqrestore (&ehci->lock, flags);
600 return status ? retval : 0;
601 }
602
603 /*-------------------------------------------------------------------------*/
604
605 static void
606 ehci_hub_descriptor (
607 struct ehci_hcd *ehci,
608 struct usb_hub_descriptor *desc
609 ) {
610 int ports = HCS_N_PORTS (ehci->hcs_params);
611 u16 temp;
612
613 desc->bDescriptorType = 0x29;
614 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
615 desc->bHubContrCurrent = 0;
616
617 desc->bNbrPorts = ports;
618 temp = 1 + (ports / 8);
619 desc->bDescLength = 7 + 2 * temp;
620
621 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
622 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
623 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
624
625 temp = 0x0008; /* per-port overcurrent reporting */
626 if (HCS_PPC (ehci->hcs_params))
627 temp |= 0x0001; /* per-port power control */
628 else
629 temp |= 0x0002; /* no power switching */
630 #if 0
631 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
632 if (HCS_INDICATOR (ehci->hcs_params))
633 temp |= 0x0080; /* per-port indicators (LEDs) */
634 #endif
635 desc->wHubCharacteristics = cpu_to_le16(temp);
636 }
637
638 /*-------------------------------------------------------------------------*/
639
640 static int ehci_hub_control (
641 struct usb_hcd *hcd,
642 u16 typeReq,
643 u16 wValue,
644 u16 wIndex,
645 char *buf,
646 u16 wLength
647 ) {
648 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
649 int ports = HCS_N_PORTS (ehci->hcs_params);
650 u32 __iomem *status_reg = &ehci->regs->port_status[
651 (wIndex & 0xff) - 1];
652 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
653 u32 temp, temp1, status;
654 unsigned long flags;
655 int retval = 0;
656 unsigned selector;
657
658 /*
659 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
660 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
661 * (track current state ourselves) ... blink for diagnostics,
662 * power, "this is the one", etc. EHCI spec supports this.
663 */
664
665 spin_lock_irqsave (&ehci->lock, flags);
666 switch (typeReq) {
667 case ClearHubFeature:
668 switch (wValue) {
669 case C_HUB_LOCAL_POWER:
670 case C_HUB_OVER_CURRENT:
671 /* no hub-wide feature/status flags */
672 break;
673 default:
674 goto error;
675 }
676 break;
677 case ClearPortFeature:
678 if (!wIndex || wIndex > ports)
679 goto error;
680 wIndex--;
681 temp = ehci_readl(ehci, status_reg);
682 temp &= ~PORT_RWC_BITS;
683
684 /*
685 * Even if OWNER is set, so the port is owned by the
686 * companion controller, khubd needs to be able to clear
687 * the port-change status bits (especially
688 * USB_PORT_STAT_C_CONNECTION).
689 */
690
691 switch (wValue) {
692 case USB_PORT_FEAT_ENABLE:
693 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
694 break;
695 case USB_PORT_FEAT_C_ENABLE:
696 ehci_writel(ehci, temp | PORT_PEC, status_reg);
697 break;
698 case USB_PORT_FEAT_SUSPEND:
699 if (temp & PORT_RESET)
700 goto error;
701 if (ehci->no_selective_suspend)
702 break;
703 #ifdef CONFIG_USB_OTG
704 if ((hcd->self.otg_port == (wIndex + 1))
705 && hcd->self.b_hnp_enable) {
706 otg_start_hnp(hcd->phy->otg);
707 break;
708 }
709 #endif
710 if (!(temp & PORT_SUSPEND))
711 break;
712 if ((temp & PORT_PE) == 0)
713 goto error;
714
715 /* clear phy low-power mode before resume */
716 if (ehci->has_hostpc) {
717 temp1 = ehci_readl(ehci, hostpc_reg);
718 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
719 hostpc_reg);
720 spin_unlock_irqrestore(&ehci->lock, flags);
721 msleep(5);/* wait to leave low-power mode */
722 spin_lock_irqsave(&ehci->lock, flags);
723 }
724 /* resume signaling for 20 msec */
725 temp &= ~PORT_WAKE_BITS;
726 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
727 ehci->reset_done[wIndex] = jiffies
728 + msecs_to_jiffies(20);
729 break;
730 case USB_PORT_FEAT_C_SUSPEND:
731 clear_bit(wIndex, &ehci->port_c_suspend);
732 break;
733 case USB_PORT_FEAT_POWER:
734 if (HCS_PPC (ehci->hcs_params))
735 ehci_writel(ehci, temp & ~PORT_POWER,
736 status_reg);
737 break;
738 case USB_PORT_FEAT_C_CONNECTION:
739 if (ehci->has_lpm) {
740 /* clear PORTSC bits on disconnect */
741 temp &= ~PORT_LPM;
742 temp &= ~PORT_DEV_ADDR;
743 }
744 ehci_writel(ehci, temp | PORT_CSC, status_reg);
745 break;
746 case USB_PORT_FEAT_C_OVER_CURRENT:
747 ehci_writel(ehci, temp | PORT_OCC, status_reg);
748 break;
749 case USB_PORT_FEAT_C_RESET:
750 /* GetPortStatus clears reset */
751 break;
752 default:
753 goto error;
754 }
755 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
756 break;
757 case GetHubDescriptor:
758 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
759 buf);
760 break;
761 case GetHubStatus:
762 /* no hub-wide feature/status flags */
763 memset (buf, 0, 4);
764 //cpu_to_le32s ((u32 *) buf);
765 break;
766 case GetPortStatus:
767 if (!wIndex || wIndex > ports)
768 goto error;
769 wIndex--;
770 status = 0;
771 temp = ehci_readl(ehci, status_reg);
772
773 // wPortChange bits
774 if (temp & PORT_CSC)
775 status |= USB_PORT_STAT_C_CONNECTION << 16;
776 if (temp & PORT_PEC)
777 status |= USB_PORT_STAT_C_ENABLE << 16;
778
779 if ((temp & PORT_OCC) && !ignore_oc){
780 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
781
782 /*
783 * Hubs should disable port power on over-current.
784 * However, not all EHCI implementations do this
785 * automatically, even if they _do_ support per-port
786 * power switching; they're allowed to just limit the
787 * current. khubd will turn the power back on.
788 */
789 if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
790 ehci_writel(ehci,
791 temp & ~(PORT_RWC_BITS | PORT_POWER),
792 status_reg);
793 temp = ehci_readl(ehci, status_reg);
794 }
795 }
796
797 /* whoever resumes must GetPortStatus to complete it!! */
798 if (temp & PORT_RESUME) {
799
800 /* Remote Wakeup received? */
801 if (!ehci->reset_done[wIndex]) {
802 /* resume signaling for 20 msec */
803 ehci->reset_done[wIndex] = jiffies
804 + msecs_to_jiffies(20);
805 /* check the port again */
806 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
807 ehci->reset_done[wIndex]);
808 }
809
810 /* resume completed? */
811 else if (time_after_eq(jiffies,
812 ehci->reset_done[wIndex])) {
813 clear_bit(wIndex, &ehci->suspended_ports);
814 set_bit(wIndex, &ehci->port_c_suspend);
815 ehci->reset_done[wIndex] = 0;
816
817 /* stop resume signaling */
818 temp = ehci_readl(ehci, status_reg);
819 ehci_writel(ehci,
820 temp & ~(PORT_RWC_BITS | PORT_RESUME),
821 status_reg);
822 clear_bit(wIndex, &ehci->resuming_ports);
823 retval = handshake(ehci, status_reg,
824 PORT_RESUME, 0, 2000 /* 2msec */);
825 if (retval != 0) {
826 ehci_err(ehci,
827 "port %d resume error %d\n",
828 wIndex + 1, retval);
829 goto error;
830 }
831 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
832 }
833 }
834
835 /* whoever resets must GetPortStatus to complete it!! */
836 if ((temp & PORT_RESET)
837 && time_after_eq(jiffies,
838 ehci->reset_done[wIndex])) {
839 status |= USB_PORT_STAT_C_RESET << 16;
840 ehci->reset_done [wIndex] = 0;
841 clear_bit(wIndex, &ehci->resuming_ports);
842
843 /* force reset to complete */
844 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
845 status_reg);
846 /* REVISIT: some hardware needs 550+ usec to clear
847 * this bit; seems too long to spin routinely...
848 */
849 retval = handshake(ehci, status_reg,
850 PORT_RESET, 0, 1000);
851 if (retval != 0) {
852 ehci_err (ehci, "port %d reset error %d\n",
853 wIndex + 1, retval);
854 goto error;
855 }
856
857 /* see what we found out */
858 temp = check_reset_complete (ehci, wIndex, status_reg,
859 ehci_readl(ehci, status_reg));
860 }
861
862 if (!(temp & (PORT_RESUME|PORT_RESET))) {
863 ehci->reset_done[wIndex] = 0;
864 clear_bit(wIndex, &ehci->resuming_ports);
865 }
866
867 /* transfer dedicated ports to the companion hc */
868 if ((temp & PORT_CONNECT) &&
869 test_bit(wIndex, &ehci->companion_ports)) {
870 temp &= ~PORT_RWC_BITS;
871 temp |= PORT_OWNER;
872 ehci_writel(ehci, temp, status_reg);
873 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
874 temp = ehci_readl(ehci, status_reg);
875 }
876
877 /*
878 * Even if OWNER is set, there's no harm letting khubd
879 * see the wPortStatus values (they should all be 0 except
880 * for PORT_POWER anyway).
881 */
882
883 if (temp & PORT_CONNECT) {
884 status |= USB_PORT_STAT_CONNECTION;
885 // status may be from integrated TT
886 if (ehci->has_hostpc) {
887 temp1 = ehci_readl(ehci, hostpc_reg);
888 status |= ehci_port_speed(ehci, temp1);
889 } else
890 status |= ehci_port_speed(ehci, temp);
891 }
892 if (temp & PORT_PE)
893 status |= USB_PORT_STAT_ENABLE;
894
895 /* maybe the port was unsuspended without our knowledge */
896 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
897 status |= USB_PORT_STAT_SUSPEND;
898 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
899 clear_bit(wIndex, &ehci->suspended_ports);
900 clear_bit(wIndex, &ehci->resuming_ports);
901 ehci->reset_done[wIndex] = 0;
902 if (temp & PORT_PE)
903 set_bit(wIndex, &ehci->port_c_suspend);
904 }
905
906 if (temp & PORT_OC)
907 status |= USB_PORT_STAT_OVERCURRENT;
908 if (temp & PORT_RESET)
909 status |= USB_PORT_STAT_RESET;
910 if (temp & PORT_POWER)
911 status |= USB_PORT_STAT_POWER;
912 if (test_bit(wIndex, &ehci->port_c_suspend))
913 status |= USB_PORT_STAT_C_SUSPEND << 16;
914
915 #ifndef VERBOSE_DEBUG
916 if (status & ~0xffff) /* only if wPortChange is interesting */
917 #endif
918 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
919 put_unaligned_le32(status, buf);
920 break;
921 case SetHubFeature:
922 switch (wValue) {
923 case C_HUB_LOCAL_POWER:
924 case C_HUB_OVER_CURRENT:
925 /* no hub-wide feature/status flags */
926 break;
927 default:
928 goto error;
929 }
930 break;
931 case SetPortFeature:
932 selector = wIndex >> 8;
933 wIndex &= 0xff;
934 if (unlikely(ehci->debug)) {
935 /* If the debug port is active any port
936 * feature requests should get denied */
937 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
938 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
939 retval = -ENODEV;
940 goto error_exit;
941 }
942 }
943 if (!wIndex || wIndex > ports)
944 goto error;
945 wIndex--;
946 temp = ehci_readl(ehci, status_reg);
947 if (temp & PORT_OWNER)
948 break;
949
950 temp &= ~PORT_RWC_BITS;
951 switch (wValue) {
952 case USB_PORT_FEAT_SUSPEND:
953 if (ehci->no_selective_suspend)
954 break;
955 if ((temp & PORT_PE) == 0
956 || (temp & PORT_RESET) != 0)
957 goto error;
958
959 /* After above check the port must be connected.
960 * Set appropriate bit thus could put phy into low power
961 * mode if we have hostpc feature
962 */
963 temp &= ~PORT_WKCONN_E;
964 temp |= PORT_WKDISC_E | PORT_WKOC_E;
965 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
966 if (ehci->has_hostpc) {
967 spin_unlock_irqrestore(&ehci->lock, flags);
968 msleep(5);/* 5ms for HCD enter low pwr mode */
969 spin_lock_irqsave(&ehci->lock, flags);
970 temp1 = ehci_readl(ehci, hostpc_reg);
971 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
972 hostpc_reg);
973 temp1 = ehci_readl(ehci, hostpc_reg);
974 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
975 wIndex, (temp1 & HOSTPC_PHCD) ?
976 "succeeded" : "failed");
977 }
978 set_bit(wIndex, &ehci->suspended_ports);
979 break;
980 case USB_PORT_FEAT_POWER:
981 if (HCS_PPC (ehci->hcs_params))
982 ehci_writel(ehci, temp | PORT_POWER,
983 status_reg);
984 break;
985 case USB_PORT_FEAT_RESET:
986 if (temp & PORT_RESUME)
987 goto error;
988 /* line status bits may report this as low speed,
989 * which can be fine if this root hub has a
990 * transaction translator built in.
991 */
992 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
993 && !ehci_is_TDI(ehci)
994 && PORT_USB11 (temp)) {
995 ehci_dbg (ehci,
996 "port %d low speed --> companion\n",
997 wIndex + 1);
998 temp |= PORT_OWNER;
999 } else {
1000 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1001 temp |= PORT_RESET;
1002 temp &= ~PORT_PE;
1003
1004 /*
1005 * caller must wait, then call GetPortStatus
1006 * usb 2.0 spec says 50 ms resets on root
1007 */
1008 ehci->reset_done [wIndex] = jiffies
1009 + msecs_to_jiffies (50);
1010 }
1011 ehci_writel(ehci, temp, status_reg);
1012 break;
1013
1014 /* For downstream facing ports (these): one hub port is put
1015 * into test mode according to USB2 11.24.2.13, then the hub
1016 * must be reset (which for root hub now means rmmod+modprobe,
1017 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1018 * about the EHCI-specific stuff.
1019 */
1020 case USB_PORT_FEAT_TEST:
1021 if (!selector || selector > 5)
1022 goto error;
1023 ehci_quiesce(ehci);
1024
1025 /* Put all enabled ports into suspend */
1026 while (ports--) {
1027 u32 __iomem *sreg =
1028 &ehci->regs->port_status[ports];
1029
1030 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1031 if (temp & PORT_PE)
1032 ehci_writel(ehci, temp | PORT_SUSPEND,
1033 sreg);
1034 }
1035 ehci_halt(ehci);
1036 temp = ehci_readl(ehci, status_reg);
1037 temp |= selector << 16;
1038 ehci_writel(ehci, temp, status_reg);
1039 break;
1040
1041 default:
1042 goto error;
1043 }
1044 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1045 break;
1046
1047 default:
1048 error:
1049 /* "stall" on error */
1050 retval = -EPIPE;
1051 }
1052 error_exit:
1053 spin_unlock_irqrestore (&ehci->lock, flags);
1054 return retval;
1055 }
1056
1057 static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
1058 int portnum)
1059 {
1060 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1061
1062 if (ehci_is_TDI(ehci))
1063 return;
1064 set_owner(ehci, --portnum, PORT_OWNER);
1065 }
1066
1067 static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
1068 int portnum)
1069 {
1070 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1071 u32 __iomem *reg;
1072
1073 if (ehci_is_TDI(ehci))
1074 return 0;
1075 reg = &ehci->regs->port_status[portnum - 1];
1076 return ehci_readl(ehci, reg) & PORT_OWNER;
1077 }
kernel source for telekom puls (alcatel/mediatek)