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USB: EHCI: clear PHCD before resuming
[deliverable/linux.git] / drivers / usb / host / ehci-hub.c
1 /*
2 * Copyright (C) 2001-2004 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 /* this file is part of ehci-hcd.c */
20
21 /*-------------------------------------------------------------------------*/
22
23 /*
24 * EHCI Root Hub ... the nonsharable stuff
25 *
26 * Registers don't need cpu_to_le32, that happens transparently
27 */
28
29 /*-------------------------------------------------------------------------*/
30
31 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
32
33 #ifdef CONFIG_PM
34
35 static int ehci_hub_control(
36 struct usb_hcd *hcd,
37 u16 typeReq,
38 u16 wValue,
39 u16 wIndex,
40 char *buf,
41 u16 wLength
42 );
43
44 /* After a power loss, ports that were owned by the companion must be
45 * reset so that the companion can still own them.
46 */
47 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
48 {
49 u32 __iomem *reg;
50 u32 status;
51 int port;
52 __le32 buf;
53 struct usb_hcd *hcd = ehci_to_hcd(ehci);
54
55 if (!ehci->owned_ports)
56 return;
57
58 /* Give the connections some time to appear */
59 msleep(20);
60
61 port = HCS_N_PORTS(ehci->hcs_params);
62 while (port--) {
63 if (test_bit(port, &ehci->owned_ports)) {
64 reg = &ehci->regs->port_status[port];
65 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
66
67 /* Port already owned by companion? */
68 if (status & PORT_OWNER)
69 clear_bit(port, &ehci->owned_ports);
70 else if (test_bit(port, &ehci->companion_ports))
71 ehci_writel(ehci, status & ~PORT_PE, reg);
72 else
73 ehci_hub_control(hcd, SetPortFeature,
74 USB_PORT_FEAT_RESET, port + 1,
75 NULL, 0);
76 }
77 }
78
79 if (!ehci->owned_ports)
80 return;
81 msleep(90); /* Wait for resets to complete */
82
83 port = HCS_N_PORTS(ehci->hcs_params);
84 while (port--) {
85 if (test_bit(port, &ehci->owned_ports)) {
86 ehci_hub_control(hcd, GetPortStatus,
87 0, port + 1,
88 (char *) &buf, sizeof(buf));
89
90 /* The companion should now own the port,
91 * but if something went wrong the port must not
92 * remain enabled.
93 */
94 reg = &ehci->regs->port_status[port];
95 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
96 if (status & PORT_OWNER)
97 ehci_writel(ehci, status | PORT_CSC, reg);
98 else {
99 ehci_dbg(ehci, "failed handover port %d: %x\n",
100 port + 1, status);
101 ehci_writel(ehci, status & ~PORT_PE, reg);
102 }
103 }
104 }
105
106 ehci->owned_ports = 0;
107 }
108
109 static int ehci_bus_suspend (struct usb_hcd *hcd)
110 {
111 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
112 int port;
113 int mask;
114 u32 __iomem *hostpc_reg = NULL;
115
116 ehci_dbg(ehci, "suspend root hub\n");
117
118 if (time_before (jiffies, ehci->next_statechange))
119 msleep(5);
120 del_timer_sync(&ehci->watchdog);
121 del_timer_sync(&ehci->iaa_watchdog);
122
123 spin_lock_irq (&ehci->lock);
124
125 /* Once the controller is stopped, port resumes that are already
126 * in progress won't complete. Hence if remote wakeup is enabled
127 * for the root hub and any ports are in the middle of a resume or
128 * remote wakeup, we must fail the suspend.
129 */
130 if (hcd->self.root_hub->do_remote_wakeup) {
131 port = HCS_N_PORTS(ehci->hcs_params);
132 while (port--) {
133 if (ehci->reset_done[port] != 0) {
134 spin_unlock_irq(&ehci->lock);
135 ehci_dbg(ehci, "suspend failed because "
136 "port %d is resuming\n",
137 port + 1);
138 return -EBUSY;
139 }
140 }
141 }
142
143 /* stop schedules, clean any completed work */
144 if (HC_IS_RUNNING(hcd->state)) {
145 ehci_quiesce (ehci);
146 hcd->state = HC_STATE_QUIESCING;
147 }
148 ehci->command = ehci_readl(ehci, &ehci->regs->command);
149 ehci_work(ehci);
150
151 /* Unlike other USB host controller types, EHCI doesn't have
152 * any notion of "global" or bus-wide suspend. The driver has
153 * to manually suspend all the active unsuspended ports, and
154 * then manually resume them in the bus_resume() routine.
155 */
156 ehci->bus_suspended = 0;
157 ehci->owned_ports = 0;
158 port = HCS_N_PORTS(ehci->hcs_params);
159 while (port--) {
160 u32 __iomem *reg = &ehci->regs->port_status [port];
161 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
162 u32 t2 = t1;
163
164 if (ehci->has_hostpc)
165 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
166 + HOSTPC0 + 4 * (port & 0xff));
167 /* keep track of which ports we suspend */
168 if (t1 & PORT_OWNER)
169 set_bit(port, &ehci->owned_ports);
170 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
171 t2 |= PORT_SUSPEND;
172 set_bit(port, &ehci->bus_suspended);
173 }
174
175 /* enable remote wakeup on all ports */
176 if (hcd->self.root_hub->do_remote_wakeup) {
177 /* only enable appropriate wake bits, otherwise the
178 * hardware can not go phy low power mode. If a race
179 * condition happens here(connection change during bits
180 * set), the port change detection will finally fix it.
181 */
182 if (t1 & PORT_CONNECT) {
183 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
184 t2 &= ~PORT_WKCONN_E;
185 } else {
186 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
187 t2 &= ~PORT_WKDISC_E;
188 }
189 } else
190 t2 &= ~PORT_WAKE_BITS;
191
192 if (t1 != t2) {
193 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
194 port + 1, t1, t2);
195 ehci_writel(ehci, t2, reg);
196 if (hostpc_reg) {
197 u32 t3;
198
199 spin_unlock_irq(&ehci->lock);
200 msleep(5);/* 5ms for HCD enter low pwr mode */
201 spin_lock_irq(&ehci->lock);
202 t3 = ehci_readl(ehci, hostpc_reg);
203 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
204 t3 = ehci_readl(ehci, hostpc_reg);
205 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
206 port, (t3 & HOSTPC_PHCD) ?
207 "succeeded" : "failed");
208 }
209 }
210 }
211
212 /* Apparently some devices need a >= 1-uframe delay here */
213 if (ehci->bus_suspended)
214 udelay(150);
215
216 /* turn off now-idle HC */
217 ehci_halt (ehci);
218 hcd->state = HC_STATE_SUSPENDED;
219
220 if (ehci->reclaim)
221 end_unlink_async(ehci);
222
223 /* allow remote wakeup */
224 mask = INTR_MASK;
225 if (!hcd->self.root_hub->do_remote_wakeup)
226 mask &= ~STS_PCD;
227 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
228 ehci_readl(ehci, &ehci->regs->intr_enable);
229
230 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
231 spin_unlock_irq (&ehci->lock);
232
233 /* ehci_work() may have re-enabled the watchdog timer, which we do not
234 * want, and so we must delete any pending watchdog timer events.
235 */
236 del_timer_sync(&ehci->watchdog);
237 return 0;
238 }
239
240
241 /* caller has locked the root hub, and should reset/reinit on error */
242 static int ehci_bus_resume (struct usb_hcd *hcd)
243 {
244 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
245 u32 temp;
246 u32 power_okay;
247 int i;
248 u8 resume_needed = 0;
249
250 if (time_before (jiffies, ehci->next_statechange))
251 msleep(5);
252 spin_lock_irq (&ehci->lock);
253 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
254 spin_unlock_irq(&ehci->lock);
255 return -ESHUTDOWN;
256 }
257
258 if (unlikely(ehci->debug)) {
259 if (!dbgp_reset_prep())
260 ehci->debug = NULL;
261 else
262 dbgp_external_startup();
263 }
264
265 /* Ideally and we've got a real resume here, and no port's power
266 * was lost. (For PCI, that means Vaux was maintained.) But we
267 * could instead be restoring a swsusp snapshot -- so that BIOS was
268 * the last user of the controller, not reset/pm hardware keeping
269 * state we gave to it.
270 */
271 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
272 ehci_dbg(ehci, "resume root hub%s\n",
273 power_okay ? "" : " after power loss");
274
275 /* at least some APM implementations will try to deliver
276 * IRQs right away, so delay them until we're ready.
277 */
278 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
279
280 /* re-init operational registers */
281 ehci_writel(ehci, 0, &ehci->regs->segment);
282 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
283 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
284
285 /* restore CMD_RUN, framelist size, and irq threshold */
286 ehci_writel(ehci, ehci->command, &ehci->regs->command);
287
288 /* Some controller/firmware combinations need a delay during which
289 * they set up the port statuses. See Bugzilla #8190. */
290 spin_unlock_irq(&ehci->lock);
291 msleep(8);
292 spin_lock_irq(&ehci->lock);
293
294 /* manually resume the ports we suspended during bus_suspend() */
295 i = HCS_N_PORTS (ehci->hcs_params);
296 while (i--) {
297 /* clear phy low power mode before resume */
298 if (ehci->has_hostpc) {
299 u32 __iomem *hostpc_reg =
300 (u32 __iomem *)((u8 *)ehci->regs
301 + HOSTPC0 + 4 * (i & 0xff));
302 temp = ehci_readl(ehci, hostpc_reg);
303 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
304 hostpc_reg);
305 mdelay(5);
306 }
307 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
308 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
309 if (test_bit(i, &ehci->bus_suspended) &&
310 (temp & PORT_SUSPEND)) {
311 temp |= PORT_RESUME;
312 resume_needed = 1;
313 }
314 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
315 }
316
317 /* msleep for 20ms only if code is trying to resume port */
318 if (resume_needed) {
319 spin_unlock_irq(&ehci->lock);
320 msleep(20);
321 spin_lock_irq(&ehci->lock);
322 }
323
324 i = HCS_N_PORTS (ehci->hcs_params);
325 while (i--) {
326 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
327 if (test_bit(i, &ehci->bus_suspended) &&
328 (temp & PORT_SUSPEND)) {
329 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
330 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
331 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
332 }
333 }
334 (void) ehci_readl(ehci, &ehci->regs->command);
335
336 /* maybe re-activate the schedule(s) */
337 temp = 0;
338 if (ehci->async->qh_next.qh)
339 temp |= CMD_ASE;
340 if (ehci->periodic_sched)
341 temp |= CMD_PSE;
342 if (temp) {
343 ehci->command |= temp;
344 ehci_writel(ehci, ehci->command, &ehci->regs->command);
345 }
346
347 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
348 hcd->state = HC_STATE_RUNNING;
349
350 /* Now we can safely re-enable irqs */
351 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
352
353 spin_unlock_irq (&ehci->lock);
354 ehci_handover_companion_ports(ehci);
355 return 0;
356 }
357
358 #else
359
360 #define ehci_bus_suspend NULL
361 #define ehci_bus_resume NULL
362
363 #endif /* CONFIG_PM */
364
365 /*-------------------------------------------------------------------------*/
366
367 /* Display the ports dedicated to the companion controller */
368 static ssize_t show_companion(struct device *dev,
369 struct device_attribute *attr,
370 char *buf)
371 {
372 struct ehci_hcd *ehci;
373 int nports, index, n;
374 int count = PAGE_SIZE;
375 char *ptr = buf;
376
377 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
378 nports = HCS_N_PORTS(ehci->hcs_params);
379
380 for (index = 0; index < nports; ++index) {
381 if (test_bit(index, &ehci->companion_ports)) {
382 n = scnprintf(ptr, count, "%d\n", index + 1);
383 ptr += n;
384 count -= n;
385 }
386 }
387 return ptr - buf;
388 }
389
390 /*
391 * Sets the owner of a port
392 */
393 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
394 {
395 u32 __iomem *status_reg;
396 u32 port_status;
397 int try;
398
399 status_reg = &ehci->regs->port_status[portnum];
400
401 /*
402 * The controller won't set the OWNER bit if the port is
403 * enabled, so this loop will sometimes require at least two
404 * iterations: one to disable the port and one to set OWNER.
405 */
406 for (try = 4; try > 0; --try) {
407 spin_lock_irq(&ehci->lock);
408 port_status = ehci_readl(ehci, status_reg);
409 if ((port_status & PORT_OWNER) == new_owner
410 || (port_status & (PORT_OWNER | PORT_CONNECT))
411 == 0)
412 try = 0;
413 else {
414 port_status ^= PORT_OWNER;
415 port_status &= ~(PORT_PE | PORT_RWC_BITS);
416 ehci_writel(ehci, port_status, status_reg);
417 }
418 spin_unlock_irq(&ehci->lock);
419 if (try > 1)
420 msleep(5);
421 }
422 }
423
424 /*
425 * Dedicate or undedicate a port to the companion controller.
426 * Syntax is "[-]portnum", where a leading '-' sign means
427 * return control of the port to the EHCI controller.
428 */
429 static ssize_t store_companion(struct device *dev,
430 struct device_attribute *attr,
431 const char *buf, size_t count)
432 {
433 struct ehci_hcd *ehci;
434 int portnum, new_owner;
435
436 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
437 new_owner = PORT_OWNER; /* Owned by companion */
438 if (sscanf(buf, "%d", &portnum) != 1)
439 return -EINVAL;
440 if (portnum < 0) {
441 portnum = - portnum;
442 new_owner = 0; /* Owned by EHCI */
443 }
444 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
445 return -ENOENT;
446 portnum--;
447 if (new_owner)
448 set_bit(portnum, &ehci->companion_ports);
449 else
450 clear_bit(portnum, &ehci->companion_ports);
451 set_owner(ehci, portnum, new_owner);
452 return count;
453 }
454 static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
455
456 static inline void create_companion_file(struct ehci_hcd *ehci)
457 {
458 int i;
459
460 /* with integrated TT there is no companion! */
461 if (!ehci_is_TDI(ehci))
462 i = device_create_file(ehci_to_hcd(ehci)->self.controller,
463 &dev_attr_companion);
464 }
465
466 static inline void remove_companion_file(struct ehci_hcd *ehci)
467 {
468 /* with integrated TT there is no companion! */
469 if (!ehci_is_TDI(ehci))
470 device_remove_file(ehci_to_hcd(ehci)->self.controller,
471 &dev_attr_companion);
472 }
473
474
475 /*-------------------------------------------------------------------------*/
476
477 static int check_reset_complete (
478 struct ehci_hcd *ehci,
479 int index,
480 u32 __iomem *status_reg,
481 int port_status
482 ) {
483 if (!(port_status & PORT_CONNECT))
484 return port_status;
485
486 /* if reset finished and it's still not enabled -- handoff */
487 if (!(port_status & PORT_PE)) {
488
489 /* with integrated TT, there's nobody to hand it to! */
490 if (ehci_is_TDI(ehci)) {
491 ehci_dbg (ehci,
492 "Failed to enable port %d on root hub TT\n",
493 index+1);
494 return port_status;
495 }
496
497 ehci_dbg (ehci, "port %d full speed --> companion\n",
498 index + 1);
499
500 // what happens if HCS_N_CC(params) == 0 ?
501 port_status |= PORT_OWNER;
502 port_status &= ~PORT_RWC_BITS;
503 ehci_writel(ehci, port_status, status_reg);
504
505 /* ensure 440EPX ohci controller state is operational */
506 if (ehci->has_amcc_usb23)
507 set_ohci_hcfs(ehci, 1);
508 } else {
509 ehci_dbg (ehci, "port %d high speed\n", index + 1);
510 /* ensure 440EPx ohci controller state is suspended */
511 if (ehci->has_amcc_usb23)
512 set_ohci_hcfs(ehci, 0);
513 }
514
515 return port_status;
516 }
517
518 /*-------------------------------------------------------------------------*/
519
520
521 /* build "status change" packet (one or two bytes) from HC registers */
522
523 static int
524 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
525 {
526 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
527 u32 temp, status = 0;
528 u32 mask;
529 int ports, i, retval = 1;
530 unsigned long flags;
531
532 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
533 if (!HC_IS_RUNNING(hcd->state))
534 return 0;
535
536 /* init status to no-changes */
537 buf [0] = 0;
538 ports = HCS_N_PORTS (ehci->hcs_params);
539 if (ports > 7) {
540 buf [1] = 0;
541 retval++;
542 }
543
544 /* Some boards (mostly VIA?) report bogus overcurrent indications,
545 * causing massive log spam unless we completely ignore them. It
546 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
547 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
548 * PORT_POWER; that's surprising, but maybe within-spec.
549 */
550 if (!ignore_oc)
551 mask = PORT_CSC | PORT_PEC | PORT_OCC;
552 else
553 mask = PORT_CSC | PORT_PEC;
554 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
555
556 /* no hub change reports (bit 0) for now (power, ...) */
557
558 /* port N changes (bit N)? */
559 spin_lock_irqsave (&ehci->lock, flags);
560 for (i = 0; i < ports; i++) {
561 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
562
563 /*
564 * Return status information even for ports with OWNER set.
565 * Otherwise khubd wouldn't see the disconnect event when a
566 * high-speed device is switched over to the companion
567 * controller by the user.
568 */
569
570 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
571 || (ehci->reset_done[i] && time_after_eq(
572 jiffies, ehci->reset_done[i]))) {
573 if (i < 7)
574 buf [0] |= 1 << (i + 1);
575 else
576 buf [1] |= 1 << (i - 7);
577 status = STS_PCD;
578 }
579 }
580 /* FIXME autosuspend idle root hubs */
581 spin_unlock_irqrestore (&ehci->lock, flags);
582 return status ? retval : 0;
583 }
584
585 /*-------------------------------------------------------------------------*/
586
587 static void
588 ehci_hub_descriptor (
589 struct ehci_hcd *ehci,
590 struct usb_hub_descriptor *desc
591 ) {
592 int ports = HCS_N_PORTS (ehci->hcs_params);
593 u16 temp;
594
595 desc->bDescriptorType = 0x29;
596 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
597 desc->bHubContrCurrent = 0;
598
599 desc->bNbrPorts = ports;
600 temp = 1 + (ports / 8);
601 desc->bDescLength = 7 + 2 * temp;
602
603 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
604 memset (&desc->bitmap [0], 0, temp);
605 memset (&desc->bitmap [temp], 0xff, temp);
606
607 temp = 0x0008; /* per-port overcurrent reporting */
608 if (HCS_PPC (ehci->hcs_params))
609 temp |= 0x0001; /* per-port power control */
610 else
611 temp |= 0x0002; /* no power switching */
612 #if 0
613 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
614 if (HCS_INDICATOR (ehci->hcs_params))
615 temp |= 0x0080; /* per-port indicators (LEDs) */
616 #endif
617 desc->wHubCharacteristics = cpu_to_le16(temp);
618 }
619
620 /*-------------------------------------------------------------------------*/
621
622 static int ehci_hub_control (
623 struct usb_hcd *hcd,
624 u16 typeReq,
625 u16 wValue,
626 u16 wIndex,
627 char *buf,
628 u16 wLength
629 ) {
630 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
631 int ports = HCS_N_PORTS (ehci->hcs_params);
632 u32 __iomem *status_reg = &ehci->regs->port_status[
633 (wIndex & 0xff) - 1];
634 u32 __iomem *hostpc_reg = NULL;
635 u32 temp, temp1, status;
636 unsigned long flags;
637 int retval = 0;
638 unsigned selector;
639
640 /*
641 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
642 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
643 * (track current state ourselves) ... blink for diagnostics,
644 * power, "this is the one", etc. EHCI spec supports this.
645 */
646
647 if (ehci->has_hostpc)
648 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
649 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
650 spin_lock_irqsave (&ehci->lock, flags);
651 switch (typeReq) {
652 case ClearHubFeature:
653 switch (wValue) {
654 case C_HUB_LOCAL_POWER:
655 case C_HUB_OVER_CURRENT:
656 /* no hub-wide feature/status flags */
657 break;
658 default:
659 goto error;
660 }
661 break;
662 case ClearPortFeature:
663 if (!wIndex || wIndex > ports)
664 goto error;
665 wIndex--;
666 temp = ehci_readl(ehci, status_reg);
667
668 /*
669 * Even if OWNER is set, so the port is owned by the
670 * companion controller, khubd needs to be able to clear
671 * the port-change status bits (especially
672 * USB_PORT_STAT_C_CONNECTION).
673 */
674
675 switch (wValue) {
676 case USB_PORT_FEAT_ENABLE:
677 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
678 break;
679 case USB_PORT_FEAT_C_ENABLE:
680 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
681 status_reg);
682 break;
683 case USB_PORT_FEAT_SUSPEND:
684 if (temp & PORT_RESET)
685 goto error;
686 if (ehci->no_selective_suspend)
687 break;
688 if (temp & PORT_SUSPEND) {
689 if ((temp & PORT_PE) == 0)
690 goto error;
691 /* clear phy low power mode before resume */
692 if (hostpc_reg) {
693 temp1 = ehci_readl(ehci, hostpc_reg);
694 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
695 hostpc_reg);
696 mdelay(5);
697 }
698 /* resume signaling for 20 msec */
699 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
700 ehci_writel(ehci, temp | PORT_RESUME,
701 status_reg);
702 ehci->reset_done [wIndex] = jiffies
703 + msecs_to_jiffies (20);
704 }
705 break;
706 case USB_PORT_FEAT_C_SUSPEND:
707 clear_bit(wIndex, &ehci->port_c_suspend);
708 break;
709 case USB_PORT_FEAT_POWER:
710 if (HCS_PPC (ehci->hcs_params))
711 ehci_writel(ehci,
712 temp & ~(PORT_RWC_BITS | PORT_POWER),
713 status_reg);
714 break;
715 case USB_PORT_FEAT_C_CONNECTION:
716 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
717 status_reg);
718 break;
719 case USB_PORT_FEAT_C_OVER_CURRENT:
720 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
721 status_reg);
722 break;
723 case USB_PORT_FEAT_C_RESET:
724 /* GetPortStatus clears reset */
725 break;
726 default:
727 goto error;
728 }
729 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
730 break;
731 case GetHubDescriptor:
732 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
733 buf);
734 break;
735 case GetHubStatus:
736 /* no hub-wide feature/status flags */
737 memset (buf, 0, 4);
738 //cpu_to_le32s ((u32 *) buf);
739 break;
740 case GetPortStatus:
741 if (!wIndex || wIndex > ports)
742 goto error;
743 wIndex--;
744 status = 0;
745 temp = ehci_readl(ehci, status_reg);
746
747 // wPortChange bits
748 if (temp & PORT_CSC)
749 status |= USB_PORT_STAT_C_CONNECTION << 16;
750 if (temp & PORT_PEC)
751 status |= USB_PORT_STAT_C_ENABLE << 16;
752
753 if ((temp & PORT_OCC) && !ignore_oc){
754 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
755
756 /*
757 * Hubs should disable port power on over-current.
758 * However, not all EHCI implementations do this
759 * automatically, even if they _do_ support per-port
760 * power switching; they're allowed to just limit the
761 * current. khubd will turn the power back on.
762 */
763 if (HCS_PPC (ehci->hcs_params)){
764 ehci_writel(ehci,
765 temp & ~(PORT_RWC_BITS | PORT_POWER),
766 status_reg);
767 }
768 }
769
770 /* whoever resumes must GetPortStatus to complete it!! */
771 if (temp & PORT_RESUME) {
772
773 /* Remote Wakeup received? */
774 if (!ehci->reset_done[wIndex]) {
775 /* resume signaling for 20 msec */
776 ehci->reset_done[wIndex] = jiffies
777 + msecs_to_jiffies(20);
778 /* check the port again */
779 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
780 ehci->reset_done[wIndex]);
781 }
782
783 /* resume completed? */
784 else if (time_after_eq(jiffies,
785 ehci->reset_done[wIndex])) {
786 clear_bit(wIndex, &ehci->suspended_ports);
787 set_bit(wIndex, &ehci->port_c_suspend);
788 ehci->reset_done[wIndex] = 0;
789
790 /* stop resume signaling */
791 temp = ehci_readl(ehci, status_reg);
792 ehci_writel(ehci,
793 temp & ~(PORT_RWC_BITS | PORT_RESUME),
794 status_reg);
795 retval = handshake(ehci, status_reg,
796 PORT_RESUME, 0, 2000 /* 2msec */);
797 if (retval != 0) {
798 ehci_err(ehci,
799 "port %d resume error %d\n",
800 wIndex + 1, retval);
801 goto error;
802 }
803 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
804 }
805 }
806
807 /* whoever resets must GetPortStatus to complete it!! */
808 if ((temp & PORT_RESET)
809 && time_after_eq(jiffies,
810 ehci->reset_done[wIndex])) {
811 status |= USB_PORT_STAT_C_RESET << 16;
812 ehci->reset_done [wIndex] = 0;
813
814 /* force reset to complete */
815 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
816 status_reg);
817 /* REVISIT: some hardware needs 550+ usec to clear
818 * this bit; seems too long to spin routinely...
819 */
820 retval = handshake(ehci, status_reg,
821 PORT_RESET, 0, 1000);
822 if (retval != 0) {
823 ehci_err (ehci, "port %d reset error %d\n",
824 wIndex + 1, retval);
825 goto error;
826 }
827
828 /* see what we found out */
829 temp = check_reset_complete (ehci, wIndex, status_reg,
830 ehci_readl(ehci, status_reg));
831 }
832
833 if (!(temp & (PORT_RESUME|PORT_RESET)))
834 ehci->reset_done[wIndex] = 0;
835
836 /* transfer dedicated ports to the companion hc */
837 if ((temp & PORT_CONNECT) &&
838 test_bit(wIndex, &ehci->companion_ports)) {
839 temp &= ~PORT_RWC_BITS;
840 temp |= PORT_OWNER;
841 ehci_writel(ehci, temp, status_reg);
842 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
843 temp = ehci_readl(ehci, status_reg);
844 }
845
846 /*
847 * Even if OWNER is set, there's no harm letting khubd
848 * see the wPortStatus values (they should all be 0 except
849 * for PORT_POWER anyway).
850 */
851
852 if (temp & PORT_CONNECT) {
853 status |= USB_PORT_STAT_CONNECTION;
854 // status may be from integrated TT
855 if (ehci->has_hostpc) {
856 temp1 = ehci_readl(ehci, hostpc_reg);
857 status |= ehci_port_speed(ehci, temp1);
858 } else
859 status |= ehci_port_speed(ehci, temp);
860 }
861 if (temp & PORT_PE)
862 status |= USB_PORT_STAT_ENABLE;
863
864 /* maybe the port was unsuspended without our knowledge */
865 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
866 status |= USB_PORT_STAT_SUSPEND;
867 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
868 clear_bit(wIndex, &ehci->suspended_ports);
869 ehci->reset_done[wIndex] = 0;
870 if (temp & PORT_PE)
871 set_bit(wIndex, &ehci->port_c_suspend);
872 }
873
874 if (temp & PORT_OC)
875 status |= USB_PORT_STAT_OVERCURRENT;
876 if (temp & PORT_RESET)
877 status |= USB_PORT_STAT_RESET;
878 if (temp & PORT_POWER)
879 status |= USB_PORT_STAT_POWER;
880 if (test_bit(wIndex, &ehci->port_c_suspend))
881 status |= USB_PORT_STAT_C_SUSPEND << 16;
882
883 #ifndef VERBOSE_DEBUG
884 if (status & ~0xffff) /* only if wPortChange is interesting */
885 #endif
886 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
887 put_unaligned_le32(status, buf);
888 break;
889 case SetHubFeature:
890 switch (wValue) {
891 case C_HUB_LOCAL_POWER:
892 case C_HUB_OVER_CURRENT:
893 /* no hub-wide feature/status flags */
894 break;
895 default:
896 goto error;
897 }
898 break;
899 case SetPortFeature:
900 selector = wIndex >> 8;
901 wIndex &= 0xff;
902 if (unlikely(ehci->debug)) {
903 /* If the debug port is active any port
904 * feature requests should get denied */
905 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
906 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
907 retval = -ENODEV;
908 goto error_exit;
909 }
910 }
911 if (!wIndex || wIndex > ports)
912 goto error;
913 wIndex--;
914 temp = ehci_readl(ehci, status_reg);
915 if (temp & PORT_OWNER)
916 break;
917
918 temp &= ~PORT_RWC_BITS;
919 switch (wValue) {
920 case USB_PORT_FEAT_SUSPEND:
921 if (ehci->no_selective_suspend)
922 break;
923 if ((temp & PORT_PE) == 0
924 || (temp & PORT_RESET) != 0)
925 goto error;
926
927 /* After above check the port must be connected.
928 * Set appropriate bit thus could put phy into low power
929 * mode if we have hostpc feature
930 */
931 temp &= ~PORT_WKCONN_E;
932 temp |= PORT_WKDISC_E | PORT_WKOC_E;
933 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
934 if (hostpc_reg) {
935 spin_unlock_irqrestore(&ehci->lock, flags);
936 msleep(5);/* 5ms for HCD enter low pwr mode */
937 spin_lock_irqsave(&ehci->lock, flags);
938 temp1 = ehci_readl(ehci, hostpc_reg);
939 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
940 hostpc_reg);
941 temp1 = ehci_readl(ehci, hostpc_reg);
942 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
943 wIndex, (temp1 & HOSTPC_PHCD) ?
944 "succeeded" : "failed");
945 }
946 set_bit(wIndex, &ehci->suspended_ports);
947 break;
948 case USB_PORT_FEAT_POWER:
949 if (HCS_PPC (ehci->hcs_params))
950 ehci_writel(ehci, temp | PORT_POWER,
951 status_reg);
952 break;
953 case USB_PORT_FEAT_RESET:
954 if (temp & PORT_RESUME)
955 goto error;
956 /* line status bits may report this as low speed,
957 * which can be fine if this root hub has a
958 * transaction translator built in.
959 */
960 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
961 && !ehci_is_TDI(ehci)
962 && PORT_USB11 (temp)) {
963 ehci_dbg (ehci,
964 "port %d low speed --> companion\n",
965 wIndex + 1);
966 temp |= PORT_OWNER;
967 } else {
968 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
969 temp |= PORT_RESET;
970 temp &= ~PORT_PE;
971
972 /*
973 * caller must wait, then call GetPortStatus
974 * usb 2.0 spec says 50 ms resets on root
975 */
976 ehci->reset_done [wIndex] = jiffies
977 + msecs_to_jiffies (50);
978 }
979 ehci_writel(ehci, temp, status_reg);
980 break;
981
982 /* For downstream facing ports (these): one hub port is put
983 * into test mode according to USB2 11.24.2.13, then the hub
984 * must be reset (which for root hub now means rmmod+modprobe,
985 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
986 * about the EHCI-specific stuff.
987 */
988 case USB_PORT_FEAT_TEST:
989 if (!selector || selector > 5)
990 goto error;
991 ehci_quiesce(ehci);
992 ehci_halt(ehci);
993 temp |= selector << 16;
994 ehci_writel(ehci, temp, status_reg);
995 break;
996
997 default:
998 goto error;
999 }
1000 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1001 break;
1002
1003 default:
1004 error:
1005 /* "stall" on error */
1006 retval = -EPIPE;
1007 }
1008 error_exit:
1009 spin_unlock_irqrestore (&ehci->lock, flags);
1010 return retval;
1011 }
1012
1013 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1014 {
1015 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1016
1017 if (ehci_is_TDI(ehci))
1018 return;
1019 set_owner(ehci, --portnum, PORT_OWNER);
1020 }
1021
1022 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1023 {
1024 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1025 u32 __iomem *reg;
1026
1027 if (ehci_is_TDI(ehci))
1028 return 0;
1029 reg = &ehci->regs->port_status[portnum - 1];
1030 return ehci_readl(ehci, reg) & PORT_OWNER;
1031 }
Linux kernel - Deliverables
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