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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / usb / host / ehci-hub.c
blob376f3785fe18488100e76c3cf0bb1041670c5fa2
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 void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
110 bool suspending, bool do_wakeup)
111 {
112 int port;
113 u32 temp;
114 unsigned long flags;
115
116 /* If remote wakeup is enabled for the root hub but disabled
117 * for the controller, we must adjust all the port wakeup flags
118 * when the controller is suspended or resumed. In all other
119 * cases they don't need to be changed.
120 */
121 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
122 return;
123
124 spin_lock_irqsave(&ehci->lock, flags);
125
126 /* clear phy low-power mode before changing wakeup flags */
127 if (ehci->has_hostpc) {
128 port = HCS_N_PORTS(ehci->hcs_params);
129 while (port--) {
130 u32 __iomem *hostpc_reg;
131
132 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
133 + HOSTPC0 + 4 * port);
134 temp = ehci_readl(ehci, hostpc_reg);
135 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
136 }
137 spin_unlock_irqrestore(&ehci->lock, flags);
138 msleep(5);
139 spin_lock_irqsave(&ehci->lock, flags);
140 }
141
142 port = HCS_N_PORTS(ehci->hcs_params);
143 while (port--) {
144 u32 __iomem *reg = &ehci->regs->port_status[port];
145 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
146 u32 t2 = t1 & ~PORT_WAKE_BITS;
147
148 /* If we are suspending the controller, clear the flags.
149 * If we are resuming the controller, set the wakeup flags.
150 */
151 if (!suspending) {
152 if (t1 & PORT_CONNECT)
153 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
154 else
155 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
156 }
157 ehci_vdbg(ehci, "port %d, %08x -> %08x\n",
158 port + 1, t1, t2);
159 ehci_writel(ehci, t2, reg);
160 }
161
162 /* enter phy low-power mode again */
163 if (ehci->has_hostpc) {
164 port = HCS_N_PORTS(ehci->hcs_params);
165 while (port--) {
166 u32 __iomem *hostpc_reg;
167
168 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
169 + HOSTPC0 + 4 * port);
170 temp = ehci_readl(ehci, hostpc_reg);
171 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
172 }
173 }
174
175 /* Does the root hub have a port wakeup pending? */
176 if (!suspending && (ehci_readl(ehci, &ehci->regs->status) & STS_PCD))
177 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
178
179 spin_unlock_irqrestore(&ehci->lock, flags);
180 }
181
182 static int ehci_bus_suspend (struct usb_hcd *hcd)
183 {
184 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
185 int port;
186 int mask;
187 int changed;
188
189 ehci_dbg(ehci, "suspend root hub\n");
190
191 if (time_before (jiffies, ehci->next_statechange))
192 msleep(5);
193 del_timer_sync(&ehci->watchdog);
194 del_timer_sync(&ehci->iaa_watchdog);
195
196 spin_lock_irq (&ehci->lock);
197
198 /* Once the controller is stopped, port resumes that are already
199 * in progress won't complete. Hence if remote wakeup is enabled
200 * for the root hub and any ports are in the middle of a resume or
201 * remote wakeup, we must fail the suspend.
202 */
203 if (hcd->self.root_hub->do_remote_wakeup) {
204 port = HCS_N_PORTS(ehci->hcs_params);
205 while (port--) {
206 if (ehci->reset_done[port] != 0) {
207 spin_unlock_irq(&ehci->lock);
208 ehci_dbg(ehci, "suspend failed because "
209 "port %d is resuming\n",
210 port + 1);
211 return -EBUSY;
212 }
213 }
214 }
215
216 /* stop schedules, clean any completed work */
217 if (HC_IS_RUNNING(hcd->state)) {
218 ehci_quiesce (ehci);
219 hcd->state = HC_STATE_QUIESCING;
220 }
221 ehci->command = ehci_readl(ehci, &ehci->regs->command);
222 ehci_work(ehci);
223
224 /* Unlike other USB host controller types, EHCI doesn't have
225 * any notion of "global" or bus-wide suspend. The driver has
226 * to manually suspend all the active unsuspended ports, and
227 * then manually resume them in the bus_resume() routine.
228 */
229 ehci->bus_suspended = 0;
230 ehci->owned_ports = 0;
231 changed = 0;
232 port = HCS_N_PORTS(ehci->hcs_params);
233 while (port--) {
234 u32 __iomem *reg = &ehci->regs->port_status [port];
235 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
236 u32 t2 = t1 & ~PORT_WAKE_BITS;
237
238 /* keep track of which ports we suspend */
239 if (t1 & PORT_OWNER)
240 set_bit(port, &ehci->owned_ports);
241 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
242 t2 |= PORT_SUSPEND;
243 set_bit(port, &ehci->bus_suspended);
244 }
245
246 /* enable remote wakeup on all ports, if told to do so */
247 if (hcd->self.root_hub->do_remote_wakeup) {
248 /* only enable appropriate wake bits, otherwise the
249 * hardware can not go phy low power mode. If a race
250 * condition happens here(connection change during bits
251 * set), the port change detection will finally fix it.
252 */
253 if (t1 & PORT_CONNECT)
254 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
255 else
256 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
257 }
258
259 if (t1 != t2) {
260 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
261 port + 1, t1, t2);
262 ehci_writel(ehci, t2, reg);
263 changed = 1;
264 }
265 }
266
267 if (changed && ehci->has_hostpc) {
268 spin_unlock_irq(&ehci->lock);
269 msleep(5); /* 5 ms for HCD to enter low-power mode */
270 spin_lock_irq(&ehci->lock);
271
272 port = HCS_N_PORTS(ehci->hcs_params);
273 while (port--) {
274 u32 __iomem *hostpc_reg;
275 u32 t3;
276
277 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
278 + HOSTPC0 + 4 * port);
279 t3 = ehci_readl(ehci, hostpc_reg);
280 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
281 t3 = ehci_readl(ehci, hostpc_reg);
282 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
283 port, (t3 & HOSTPC_PHCD) ?
284 "succeeded" : "failed");
285 }
286 }
287
288 /* Apparently some devices need a >= 1-uframe delay here */
289 if (ehci->bus_suspended)
290 udelay(150);
291
292 /* turn off now-idle HC */
293 ehci_halt (ehci);
294 hcd->state = HC_STATE_SUSPENDED;
295
296 if (ehci->reclaim)
297 end_unlink_async(ehci);
298
299 /* allow remote wakeup */
300 mask = INTR_MASK;
301 if (!hcd->self.root_hub->do_remote_wakeup)
302 mask &= ~STS_PCD;
303 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
304 ehci_readl(ehci, &ehci->regs->intr_enable);
305
306 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
307 spin_unlock_irq (&ehci->lock);
308
309 /* ehci_work() may have re-enabled the watchdog timer, which we do not
310 * want, and so we must delete any pending watchdog timer events.
311 */
312 del_timer_sync(&ehci->watchdog);
313 return 0;
314 }
315
316
317 /* caller has locked the root hub, and should reset/reinit on error */
318 static int ehci_bus_resume (struct usb_hcd *hcd)
319 {
320 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
321 u32 temp;
322 u32 power_okay;
323 int i;
324 u8 resume_needed = 0;
325
326 if (time_before (jiffies, ehci->next_statechange))
327 msleep(5);
328 spin_lock_irq (&ehci->lock);
329 if (!HCD_HW_ACCESSIBLE(hcd)) {
330 spin_unlock_irq(&ehci->lock);
331 return -ESHUTDOWN;
332 }
333
334 if (unlikely(ehci->debug)) {
335 if (!dbgp_reset_prep())
336 ehci->debug = NULL;
337 else
338 dbgp_external_startup();
339 }
340
341 /* Ideally and we've got a real resume here, and no port's power
342 * was lost. (For PCI, that means Vaux was maintained.) But we
343 * could instead be restoring a swsusp snapshot -- so that BIOS was
344 * the last user of the controller, not reset/pm hardware keeping
345 * state we gave to it.
346 */
347 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
348 ehci_dbg(ehci, "resume root hub%s\n",
349 power_okay ? "" : " after power loss");
350
351 /* at least some APM implementations will try to deliver
352 * IRQs right away, so delay them until we're ready.
353 */
354 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
355
356 /* re-init operational registers */
357 ehci_writel(ehci, 0, &ehci->regs->segment);
358 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
359 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
360
361 /* restore CMD_RUN, framelist size, and irq threshold */
362 ehci_writel(ehci, ehci->command, &ehci->regs->command);
363
364 /* Some controller/firmware combinations need a delay during which
365 * they set up the port statuses. See Bugzilla #8190. */
366 spin_unlock_irq(&ehci->lock);
367 msleep(8);
368 spin_lock_irq(&ehci->lock);
369
370 /* clear phy low-power mode before resume */
371 if (ehci->bus_suspended && ehci->has_hostpc) {
372 i = HCS_N_PORTS(ehci->hcs_params);
373 while (i--) {
374 if (test_bit(i, &ehci->bus_suspended)) {
375 u32 __iomem *hostpc_reg;
376
377 hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
378 + HOSTPC0 + 4 * i);
379 temp = ehci_readl(ehci, hostpc_reg);
380 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
381 hostpc_reg);
382 }
383 }
384 spin_unlock_irq(&ehci->lock);
385 msleep(5);
386 spin_lock_irq(&ehci->lock);
387 }
388
389 /* manually resume the ports we suspended during bus_suspend() */
390 i = HCS_N_PORTS (ehci->hcs_params);
391 while (i--) {
392 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
393 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
394 if (test_bit(i, &ehci->bus_suspended) &&
395 (temp & PORT_SUSPEND)) {
396 temp |= PORT_RESUME;
397 resume_needed = 1;
398 }
399 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
400 }
401
402 /* msleep for 20ms only if code is trying to resume port */
403 if (resume_needed) {
404 spin_unlock_irq(&ehci->lock);
405 msleep(20);
406 spin_lock_irq(&ehci->lock);
407 }
408
409 i = HCS_N_PORTS (ehci->hcs_params);
410 while (i--) {
411 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
412 if (test_bit(i, &ehci->bus_suspended) &&
413 (temp & PORT_SUSPEND)) {
414 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
415 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
416 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
417 }
418 }
419 (void) ehci_readl(ehci, &ehci->regs->command);
420
421 /* maybe re-activate the schedule(s) */
422 temp = 0;
423 if (ehci->async->qh_next.qh)
424 temp |= CMD_ASE;
425 if (ehci->periodic_sched)
426 temp |= CMD_PSE;
427 if (temp) {
428 ehci->command |= temp;
429 ehci_writel(ehci, ehci->command, &ehci->regs->command);
430 }
431
432 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
433 hcd->state = HC_STATE_RUNNING;
434
435 /* Now we can safely re-enable irqs */
436 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
437
438 spin_unlock_irq (&ehci->lock);
439 ehci_handover_companion_ports(ehci);
440 return 0;
441 }
442
443 #else
444
445 #define ehci_bus_suspend NULL
446 #define ehci_bus_resume NULL
447
448 #endif /* CONFIG_PM */
449
450 /*-------------------------------------------------------------------------*/
451
452 /* Display the ports dedicated to the companion controller */
453 static ssize_t show_companion(struct device *dev,
454 struct device_attribute *attr,
455 char *buf)
456 {
457 struct ehci_hcd *ehci;
458 int nports, index, n;
459 int count = PAGE_SIZE;
460 char *ptr = buf;
461
462 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
463 nports = HCS_N_PORTS(ehci->hcs_params);
464
465 for (index = 0; index < nports; ++index) {
466 if (test_bit(index, &ehci->companion_ports)) {
467 n = scnprintf(ptr, count, "%d\n", index + 1);
468 ptr += n;
469 count -= n;
470 }
471 }
472 return ptr - buf;
473 }
474
475 /*
476 * Sets the owner of a port
477 */
478 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
479 {
480 u32 __iomem *status_reg;
481 u32 port_status;
482 int try;
483
484 status_reg = &ehci->regs->port_status[portnum];
485
486 /*
487 * The controller won't set the OWNER bit if the port is
488 * enabled, so this loop will sometimes require at least two
489 * iterations: one to disable the port and one to set OWNER.
490 */
491 for (try = 4; try > 0; --try) {
492 spin_lock_irq(&ehci->lock);
493 port_status = ehci_readl(ehci, status_reg);
494 if ((port_status & PORT_OWNER) == new_owner
495 || (port_status & (PORT_OWNER | PORT_CONNECT))
496 == 0)
497 try = 0;
498 else {
499 port_status ^= PORT_OWNER;
500 port_status &= ~(PORT_PE | PORT_RWC_BITS);
501 ehci_writel(ehci, port_status, status_reg);
502 }
503 spin_unlock_irq(&ehci->lock);
504 if (try > 1)
505 msleep(5);
506 }
507 }
508
509 /*
510 * Dedicate or undedicate a port to the companion controller.
511 * Syntax is "[-]portnum", where a leading '-' sign means
512 * return control of the port to the EHCI controller.
513 */
514 static ssize_t store_companion(struct device *dev,
515 struct device_attribute *attr,
516 const char *buf, size_t count)
517 {
518 struct ehci_hcd *ehci;
519 int portnum, new_owner;
520
521 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
522 new_owner = PORT_OWNER; /* Owned by companion */
523 if (sscanf(buf, "%d", &portnum) != 1)
524 return -EINVAL;
525 if (portnum < 0) {
526 portnum = - portnum;
527 new_owner = 0; /* Owned by EHCI */
528 }
529 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
530 return -ENOENT;
531 portnum--;
532 if (new_owner)
533 set_bit(portnum, &ehci->companion_ports);
534 else
535 clear_bit(portnum, &ehci->companion_ports);
536 set_owner(ehci, portnum, new_owner);
537 return count;
538 }
539 static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
540
541 static inline void create_companion_file(struct ehci_hcd *ehci)
542 {
543 int i;
544
545 /* with integrated TT there is no companion! */
546 if (!ehci_is_TDI(ehci))
547 i = device_create_file(ehci_to_hcd(ehci)->self.controller,
548 &dev_attr_companion);
549 }
550
551 static inline void remove_companion_file(struct ehci_hcd *ehci)
552 {
553 /* with integrated TT there is no companion! */
554 if (!ehci_is_TDI(ehci))
555 device_remove_file(ehci_to_hcd(ehci)->self.controller,
556 &dev_attr_companion);
557 }
558
559
560 /*-------------------------------------------------------------------------*/
561
562 static int check_reset_complete (
563 struct ehci_hcd *ehci,
564 int index,
565 u32 __iomem *status_reg,
566 int port_status
567 ) {
568 if (!(port_status & PORT_CONNECT))
569 return port_status;
570
571 /* if reset finished and it's still not enabled -- handoff */
572 if (!(port_status & PORT_PE)) {
573
574 /* with integrated TT, there's nobody to hand it to! */
575 if (ehci_is_TDI(ehci)) {
576 ehci_dbg (ehci,
577 "Failed to enable port %d on root hub TT\n",
578 index+1);
579 return port_status;
580 }
581
582 ehci_dbg (ehci, "port %d full speed --> companion\n",
583 index + 1);
584
585 // what happens if HCS_N_CC(params) == 0 ?
586 port_status |= PORT_OWNER;
587 port_status &= ~PORT_RWC_BITS;
588 ehci_writel(ehci, port_status, status_reg);
589
590 /* ensure 440EPX ohci controller state is operational */
591 if (ehci->has_amcc_usb23)
592 set_ohci_hcfs(ehci, 1);
593 } else {
594 ehci_dbg (ehci, "port %d high speed\n", index + 1);
595 /* ensure 440EPx ohci controller state is suspended */
596 if (ehci->has_amcc_usb23)
597 set_ohci_hcfs(ehci, 0);
598 }
599
600 return port_status;
601 }
602
603 /*-------------------------------------------------------------------------*/
604
605
606 /* build "status change" packet (one or two bytes) from HC registers */
607
608 static int
609 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
610 {
611 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
612 u32 temp, status = 0;
613 u32 mask;
614 int ports, i, retval = 1;
615 unsigned long flags;
616 u32 ppcd = 0;
617
618 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
619 if (!HC_IS_RUNNING(hcd->state))
620 return 0;
621
622 /* init status to no-changes */
623 buf [0] = 0;
624 ports = HCS_N_PORTS (ehci->hcs_params);
625 if (ports > 7) {
626 buf [1] = 0;
627 retval++;
628 }
629
630 /* Some boards (mostly VIA?) report bogus overcurrent indications,
631 * causing massive log spam unless we completely ignore them. It
632 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
633 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
634 * PORT_POWER; that's surprising, but maybe within-spec.
635 */
636 if (!ignore_oc)
637 mask = PORT_CSC | PORT_PEC | PORT_OCC;
638 else
639 mask = PORT_CSC | PORT_PEC;
640 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
641
642 /* no hub change reports (bit 0) for now (power, ...) */
643
644 /* port N changes (bit N)? */
645 spin_lock_irqsave (&ehci->lock, flags);
646
647 /* get per-port change detect bits */
648 if (ehci->has_ppcd)
649 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
650
651 for (i = 0; i < ports; i++) {
652 /* leverage per-port change bits feature */
653 if (ehci->has_ppcd && !(ppcd & (1 << i)))
654 continue;
655 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
656
657 /*
658 * Return status information even for ports with OWNER set.
659 * Otherwise khubd wouldn't see the disconnect event when a
660 * high-speed device is switched over to the companion
661 * controller by the user.
662 */
663
664 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
665 || (ehci->reset_done[i] && time_after_eq(
666 jiffies, ehci->reset_done[i]))) {
667 if (i < 7)
668 buf [0] |= 1 << (i + 1);
669 else
670 buf [1] |= 1 << (i - 7);
671 status = STS_PCD;
672 }
673 }
674 spin_unlock_irqrestore (&ehci->lock, flags);
675 return status ? retval : 0;
676 }
677
678 /*-------------------------------------------------------------------------*/
679
680 static void
681 ehci_hub_descriptor (
682 struct ehci_hcd *ehci,
683 struct usb_hub_descriptor *desc
684 ) {
685 int ports = HCS_N_PORTS (ehci->hcs_params);
686 u16 temp;
687
688 desc->bDescriptorType = 0x29;
689 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
690 desc->bHubContrCurrent = 0;
691
692 desc->bNbrPorts = ports;
693 temp = 1 + (ports / 8);
694 desc->bDescLength = 7 + 2 * temp;
695
696 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
697 memset (&desc->bitmap [0], 0, temp);
698 memset (&desc->bitmap [temp], 0xff, temp);
699
700 temp = 0x0008; /* per-port overcurrent reporting */
701 if (HCS_PPC (ehci->hcs_params))
702 temp |= 0x0001; /* per-port power control */
703 else
704 temp |= 0x0002; /* no power switching */
705 desc->wHubCharacteristics = cpu_to_le16(temp);
706 }
707
708 /*-------------------------------------------------------------------------*/
709
710 static int ehci_hub_control (
711 struct usb_hcd *hcd,
712 u16 typeReq,
713 u16 wValue,
714 u16 wIndex,
715 char *buf,
716 u16 wLength
717 ) {
718 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
719 int ports = HCS_N_PORTS (ehci->hcs_params);
720 u32 __iomem *status_reg = &ehci->regs->port_status[
721 (wIndex & 0xff) - 1];
722 u32 __iomem *hostpc_reg = NULL;
723 u32 temp, temp1, status;
724 unsigned long flags;
725 int retval = 0;
726 unsigned selector;
727
728
729 if (ehci->has_hostpc)
730 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
731 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
732 spin_lock_irqsave (&ehci->lock, flags);
733 switch (typeReq) {
734 case ClearHubFeature:
735 switch (wValue) {
736 case C_HUB_LOCAL_POWER:
737 case C_HUB_OVER_CURRENT:
738 /* no hub-wide feature/status flags */
739 break;
740 default:
741 goto error;
742 }
743 break;
744 case ClearPortFeature:
745 if (!wIndex || wIndex > ports)
746 goto error;
747 wIndex--;
748 temp = ehci_readl(ehci, status_reg);
749
750 /*
751 * Even if OWNER is set, so the port is owned by the
752 * companion controller, khubd needs to be able to clear
753 * the port-change status bits (especially
754 * USB_PORT_STAT_C_CONNECTION).
755 */
756
757 switch (wValue) {
758 case USB_PORT_FEAT_ENABLE:
759 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
760 break;
761 case USB_PORT_FEAT_C_ENABLE:
762 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
763 status_reg);
764 break;
765 case USB_PORT_FEAT_SUSPEND:
766 if (temp & PORT_RESET)
767 goto error;
768 if (ehci->no_selective_suspend)
769 break;
770 if (!(temp & PORT_SUSPEND))
771 break;
772 if ((temp & PORT_PE) == 0)
773 goto error;
774
775 /* clear phy low-power mode before resume */
776 if (hostpc_reg) {
777 temp1 = ehci_readl(ehci, hostpc_reg);
778 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
779 hostpc_reg);
780 spin_unlock_irqrestore(&ehci->lock, flags);
781 msleep(5);/* wait to leave low-power mode */
782 spin_lock_irqsave(&ehci->lock, flags);
783 }
784 /* resume signaling for 20 msec */
785 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
786 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
787 ehci->reset_done[wIndex] = jiffies
788 + msecs_to_jiffies(20);
789 break;
790 case USB_PORT_FEAT_C_SUSPEND:
791 clear_bit(wIndex, &ehci->port_c_suspend);
792 break;
793 case USB_PORT_FEAT_POWER:
794 if (HCS_PPC (ehci->hcs_params))
795 ehci_writel(ehci,
796 temp & ~(PORT_RWC_BITS | PORT_POWER),
797 status_reg);
798 break;
799 case USB_PORT_FEAT_C_CONNECTION:
800 if (ehci->has_lpm) {
801 /* clear PORTSC bits on disconnect */
802 temp &= ~PORT_LPM;
803 temp &= ~PORT_DEV_ADDR;
804 }
805 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
806 status_reg);
807 break;
808 case USB_PORT_FEAT_C_OVER_CURRENT:
809 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
810 status_reg);
811 break;
812 case USB_PORT_FEAT_C_RESET:
813 /* GetPortStatus clears reset */
814 break;
815 default:
816 goto error;
817 }
818 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
819 break;
820 case GetHubDescriptor:
821 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
822 buf);
823 break;
824 case GetHubStatus:
825 /* no hub-wide feature/status flags */
826 memset (buf, 0, 4);
827 //cpu_to_le32s ((u32 *) buf);
828 break;
829 case GetPortStatus:
830 if (!wIndex || wIndex > ports)
831 goto error;
832 wIndex--;
833 status = 0;
834 temp = ehci_readl(ehci, status_reg);
835
836 // wPortChange bits
837 if (temp & PORT_CSC)
838 status |= USB_PORT_STAT_C_CONNECTION << 16;
839 if (temp & PORT_PEC)
840 status |= USB_PORT_STAT_C_ENABLE << 16;
841
842 if ((temp & PORT_OCC) && !ignore_oc){
843 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
844
845 /*
846 * Hubs should disable port power on over-current.
847 * However, not all EHCI implementations do this
848 * automatically, even if they _do_ support per-port
849 * power switching; they're allowed to just limit the
850 * current. khubd will turn the power back on.
851 */
852 if (HCS_PPC (ehci->hcs_params)){
853 ehci_writel(ehci,
854 temp & ~(PORT_RWC_BITS | PORT_POWER),
855 status_reg);
856 }
857 }
858
859 /* whoever resumes must GetPortStatus to complete it!! */
860 if (temp & PORT_RESUME) {
861
862 /* Remote Wakeup received? */
863 if (!ehci->reset_done[wIndex]) {
864 /* resume signaling for 20 msec */
865 ehci->reset_done[wIndex] = jiffies
866 + msecs_to_jiffies(20);
867 /* check the port again */
868 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
869 ehci->reset_done[wIndex]);
870 }
871
872 /* resume completed? */
873 else if (time_after_eq(jiffies,
874 ehci->reset_done[wIndex])) {
875 clear_bit(wIndex, &ehci->suspended_ports);
876 set_bit(wIndex, &ehci->port_c_suspend);
877 ehci->reset_done[wIndex] = 0;
878
879 /* stop resume signaling */
880 temp = ehci_readl(ehci, status_reg);
881 ehci_writel(ehci,
882 temp & ~(PORT_RWC_BITS | PORT_RESUME),
883 status_reg);
884 retval = handshake(ehci, status_reg,
885 PORT_RESUME, 0, 2000 /* 2msec */);
886 if (retval != 0) {
887 ehci_err(ehci,
888 "port %d resume error %d\n",
889 wIndex + 1, retval);
890 goto error;
891 }
892 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
893 }
894 }
895
896 /* whoever resets must GetPortStatus to complete it!! */
897 if ((temp & PORT_RESET)
898 && time_after_eq(jiffies,
899 ehci->reset_done[wIndex])) {
900 status |= USB_PORT_STAT_C_RESET << 16;
901 ehci->reset_done [wIndex] = 0;
902
903 /* force reset to complete */
904 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
905 status_reg);
906 /* REVISIT: some hardware needs 550+ usec to clear
907 * this bit; seems too long to spin routinely...
908 */
909 retval = handshake(ehci, status_reg,
910 PORT_RESET, 0, 1000);
911 if (retval != 0) {
912 ehci_err (ehci, "port %d reset error %d\n",
913 wIndex + 1, retval);
914 goto error;
915 }
916
917 /* see what we found out */
918 temp = check_reset_complete (ehci, wIndex, status_reg,
919 ehci_readl(ehci, status_reg));
920 }
921
922 if (!(temp & (PORT_RESUME|PORT_RESET)))
923 ehci->reset_done[wIndex] = 0;
924
925 /* transfer dedicated ports to the companion hc */
926 if ((temp & PORT_CONNECT) &&
927 test_bit(wIndex, &ehci->companion_ports)) {
928 temp &= ~PORT_RWC_BITS;
929 temp |= PORT_OWNER;
930 ehci_writel(ehci, temp, status_reg);
931 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
932 temp = ehci_readl(ehci, status_reg);
933 }
934
935 /*
936 * Even if OWNER is set, there's no harm letting khubd
937 * see the wPortStatus values (they should all be 0 except
938 * for PORT_POWER anyway).
939 */
940
941 if (temp & PORT_CONNECT) {
942 status |= USB_PORT_STAT_CONNECTION;
943 // status may be from integrated TT
944 if (ehci->has_hostpc) {
945 temp1 = ehci_readl(ehci, hostpc_reg);
946 status |= ehci_port_speed(ehci, temp1);
947 } else
948 status |= ehci_port_speed(ehci, temp);
949 }
950 if (temp & PORT_PE)
951 status |= USB_PORT_STAT_ENABLE;
952
953 /* maybe the port was unsuspended without our knowledge */
954 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
955 status |= USB_PORT_STAT_SUSPEND;
956 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
957 clear_bit(wIndex, &ehci->suspended_ports);
958 ehci->reset_done[wIndex] = 0;
959 if (temp & PORT_PE)
960 set_bit(wIndex, &ehci->port_c_suspend);
961 }
962
963 if (temp & PORT_OC)
964 status |= USB_PORT_STAT_OVERCURRENT;
965 if (temp & PORT_RESET)
966 status |= USB_PORT_STAT_RESET;
967 if (temp & PORT_POWER)
968 status |= USB_PORT_STAT_POWER;
969 if (test_bit(wIndex, &ehci->port_c_suspend))
970 status |= USB_PORT_STAT_C_SUSPEND << 16;
971
972 #ifndef VERBOSE_DEBUG
973 if (status & ~0xffff) /* only if wPortChange is interesting */
974 #endif
975 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
976 put_unaligned_le32(status, buf);
977 break;
978 case SetHubFeature:
979 switch (wValue) {
980 case C_HUB_LOCAL_POWER:
981 case C_HUB_OVER_CURRENT:
982 /* no hub-wide feature/status flags */
983 break;
984 default:
985 goto error;
986 }
987 break;
988 case SetPortFeature:
989 selector = wIndex >> 8;
990 wIndex &= 0xff;
991 if (unlikely(ehci->debug)) {
992 /* If the debug port is active any port
993 * feature requests should get denied */
994 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
995 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
996 retval = -ENODEV;
997 goto error_exit;
998 }
999 }
1000 if (!wIndex || wIndex > ports)
1001 goto error;
1002 wIndex--;
1003 temp = ehci_readl(ehci, status_reg);
1004 if (temp & PORT_OWNER)
1005 break;
1006
1007 temp &= ~PORT_RWC_BITS;
1008 switch (wValue) {
1009 case USB_PORT_FEAT_SUSPEND:
1010 if (ehci->no_selective_suspend)
1011 break;
1012 if ((temp & PORT_PE) == 0
1013 || (temp & PORT_RESET) != 0)
1014 goto error;
1015
1016 /* After above check the port must be connected.
1017 * Set appropriate bit thus could put phy into low power
1018 * mode if we have hostpc feature
1019 */
1020 temp &= ~PORT_WKCONN_E;
1021 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1022 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1023 if (hostpc_reg) {
1024 spin_unlock_irqrestore(&ehci->lock, flags);
1025 msleep(5);/* 5ms for HCD enter low pwr mode */
1026 spin_lock_irqsave(&ehci->lock, flags);
1027 temp1 = ehci_readl(ehci, hostpc_reg);
1028 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1029 hostpc_reg);
1030 temp1 = ehci_readl(ehci, hostpc_reg);
1031 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1032 wIndex, (temp1 & HOSTPC_PHCD) ?
1033 "succeeded" : "failed");
1034 }
1035 set_bit(wIndex, &ehci->suspended_ports);
1036 break;
1037 case USB_PORT_FEAT_POWER:
1038 if (HCS_PPC (ehci->hcs_params))
1039 ehci_writel(ehci, temp | PORT_POWER,
1040 status_reg);
1041 break;
1042 case USB_PORT_FEAT_RESET:
1043 if (temp & PORT_RESUME)
1044 goto error;
1045 /* line status bits may report this as low speed,
1046 * which can be fine if this root hub has a
1047 * transaction translator built in.
1048 */
1049 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1050 && !ehci_is_TDI(ehci)
1051 && PORT_USB11 (temp)) {
1052 ehci_dbg (ehci,
1053 "port %d low speed --> companion\n",
1054 wIndex + 1);
1055 temp |= PORT_OWNER;
1056 } else {
1057 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
1058 temp |= PORT_RESET;
1059 temp &= ~PORT_PE;
1060
1061 /*
1062 * caller must wait, then call GetPortStatus
1063 * usb 2.0 spec says 50 ms resets on root
1064 */
1065 ehci->reset_done [wIndex] = jiffies
1066 + msecs_to_jiffies (50);
1067 }
1068 ehci_writel(ehci, temp, status_reg);
1069 break;
1070
1071 /* For downstream facing ports (these): one hub port is put
1072 * into test mode according to USB2 11.24.2.13, then the hub
1073 * must be reset (which for root hub now means rmmod+modprobe,
1074 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1075 * about the EHCI-specific stuff.
1076 */
1077 case USB_PORT_FEAT_TEST:
1078 if (!selector || selector > 5)
1079 goto error;
1080 ehci_quiesce(ehci);
1081 ehci_halt(ehci);
1082 temp |= selector << 16;
1083 ehci_writel(ehci, temp, status_reg);
1084 break;
1085
1086 default:
1087 goto error;
1088 }
1089 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1090 break;
1091
1092 default:
1093 error:
1094 /* "stall" on error */
1095 retval = -EPIPE;
1096 }
1097 error_exit:
1098 spin_unlock_irqrestore (&ehci->lock, flags);
1099 return retval;
1100 }
1101
1102 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1103 {
1104 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1105
1106 if (ehci_is_TDI(ehci))
1107 return;
1108 set_owner(ehci, --portnum, PORT_OWNER);
1109 }
1110
1111 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1112 {
1113 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1114 u32 __iomem *reg;
1115
1116 if (ehci_is_TDI(ehci))
1117 return 0;
1118 reg = &ehci->regs->port_status[portnum - 1];
1119 return ehci_readl(ehci, reg) & PORT_OWNER;
1120 }
Tomato firmware and modifications.