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Full support for Ginger Console
[linux-ginger.git] / drivers / usb / host / ehci-hub.c
blob850f9282204541fb1e1e34407a5f7a5d56c6d96b
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 port = HCS_N_PORTS (ehci->hcs_params);
124 spin_lock_irq (&ehci->lock);
125
126 /* stop schedules, clean any completed work */
127 if (HC_IS_RUNNING(hcd->state)) {
128 ehci_quiesce (ehci);
129 hcd->state = HC_STATE_QUIESCING;
130 }
131 ehci->command = ehci_readl(ehci, &ehci->regs->command);
132 ehci_work(ehci);
133
134 /* Unlike other USB host controller types, EHCI doesn't have
135 * any notion of "global" or bus-wide suspend. The driver has
136 * to manually suspend all the active unsuspended ports, and
137 * then manually resume them in the bus_resume() routine.
138 */
139 ehci->bus_suspended = 0;
140 ehci->owned_ports = 0;
141 while (port--) {
142 u32 __iomem *reg = &ehci->regs->port_status [port];
143 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
144 u32 t2 = t1;
145
146 if (ehci->has_hostpc)
147 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
148 + HOSTPC0 + 4 * (port & 0xff));
149 /* keep track of which ports we suspend */
150 if (t1 & PORT_OWNER)
151 set_bit(port, &ehci->owned_ports);
152 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
153 t2 |= PORT_SUSPEND;
154 set_bit(port, &ehci->bus_suspended);
155 }
156
157 /* enable remote wakeup on all ports */
158 if (hcd->self.root_hub->do_remote_wakeup) {
159 /* only enable appropriate wake bits, otherwise the
160 * hardware can not go phy low power mode. If a race
161 * condition happens here(connection change during bits
162 * set), the port change detection will finally fix it.
163 */
164 if (t1 & PORT_CONNECT) {
165 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
166 t2 &= ~PORT_WKCONN_E;
167 } else {
168 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
169 t2 &= ~PORT_WKDISC_E;
170 }
171 } else
172 t2 &= ~PORT_WAKE_BITS;
173
174 if (t1 != t2) {
175 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
176 port + 1, t1, t2);
177 ehci_writel(ehci, t2, reg);
178 if (hostpc_reg) {
179 u32 t3;
180
181 msleep(5);/* 5ms for HCD enter low pwr mode */
182 t3 = ehci_readl(ehci, hostpc_reg);
183 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
184 t3 = ehci_readl(ehci, hostpc_reg);
185 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
186 port, (t3 & HOSTPC_PHCD) ?
187 "succeeded" : "failed");
188 }
189 }
190 }
191
192 /* Apparently some devices need a >= 1-uframe delay here */
193 if (ehci->bus_suspended)
194 udelay(150);
195
196 /* turn off now-idle HC */
197 ehci_halt (ehci);
198 hcd->state = HC_STATE_SUSPENDED;
199
200 if (ehci->reclaim)
201 end_unlink_async(ehci);
202
203 /* allow remote wakeup */
204 mask = INTR_MASK;
205 if (!hcd->self.root_hub->do_remote_wakeup)
206 mask &= ~STS_PCD;
207 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
208 ehci_readl(ehci, &ehci->regs->intr_enable);
209
210 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
211 spin_unlock_irq (&ehci->lock);
212
213 /* ehci_work() may have re-enabled the watchdog timer, which we do not
214 * want, and so we must delete any pending watchdog timer events.
215 */
216 del_timer_sync(&ehci->watchdog);
217 return 0;
218 }
219
220
221 /* caller has locked the root hub, and should reset/reinit on error */
222 static int ehci_bus_resume (struct usb_hcd *hcd)
223 {
224 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
225 u32 temp;
226 u32 power_okay;
227 int i;
228 u8 resume_needed = 0;
229
230 if (time_before (jiffies, ehci->next_statechange))
231 msleep(5);
232 spin_lock_irq (&ehci->lock);
233 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
234 spin_unlock_irq(&ehci->lock);
235 return -ESHUTDOWN;
236 }
237
238 if (unlikely(ehci->debug)) {
239 if (ehci->debug && !dbgp_reset_prep())
240 ehci->debug = NULL;
241 else
242 dbgp_external_startup();
243 }
244
245 /* Ideally and we've got a real resume here, and no port's power
246 * was lost. (For PCI, that means Vaux was maintained.) But we
247 * could instead be restoring a swsusp snapshot -- so that BIOS was
248 * the last user of the controller, not reset/pm hardware keeping
249 * state we gave to it.
250 */
251 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
252 ehci_dbg(ehci, "resume root hub%s\n",
253 power_okay ? "" : " after power loss");
254
255 /* at least some APM implementations will try to deliver
256 * IRQs right away, so delay them until we're ready.
257 */
258 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
259
260 /* re-init operational registers */
261 ehci_writel(ehci, 0, &ehci->regs->segment);
262 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
263 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
264
265 /* restore CMD_RUN, framelist size, and irq threshold */
266 ehci_writel(ehci, ehci->command, &ehci->regs->command);
267
268 /* Some controller/firmware combinations need a delay during which
269 * they set up the port statuses. See Bugzilla #8190. */
270 spin_unlock_irq(&ehci->lock);
271 msleep(8);
272 spin_lock_irq(&ehci->lock);
273
274 /* manually resume the ports we suspended during bus_suspend() */
275 i = HCS_N_PORTS (ehci->hcs_params);
276 while (i--) {
277 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
278 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
279 if (test_bit(i, &ehci->bus_suspended) &&
280 (temp & PORT_SUSPEND)) {
281 temp |= PORT_RESUME;
282 resume_needed = 1;
283 }
284 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
285 }
286
287 /* msleep for 20ms only if code is trying to resume port */
288 if (resume_needed) {
289 spin_unlock_irq(&ehci->lock);
290 msleep(20);
291 spin_lock_irq(&ehci->lock);
292 }
293
294 i = HCS_N_PORTS (ehci->hcs_params);
295 while (i--) {
296 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
297 if (test_bit(i, &ehci->bus_suspended) &&
298 (temp & PORT_SUSPEND)) {
299 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
300 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
301 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
302 }
303 }
304 (void) ehci_readl(ehci, &ehci->regs->command);
305
306 /* maybe re-activate the schedule(s) */
307 temp = 0;
308 if (ehci->async->qh_next.qh)
309 temp |= CMD_ASE;
310 if (ehci->periodic_sched)
311 temp |= CMD_PSE;
312 if (temp) {
313 ehci->command |= temp;
314 ehci_writel(ehci, ehci->command, &ehci->regs->command);
315 }
316
317 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
318 hcd->state = HC_STATE_RUNNING;
319
320 /* Now we can safely re-enable irqs */
321 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
322
323 spin_unlock_irq (&ehci->lock);
324 ehci_handover_companion_ports(ehci);
325 return 0;
326 }
327
328 #else
329
330 #define ehci_bus_suspend NULL
331 #define ehci_bus_resume NULL
332
333 #endif /* CONFIG_PM */
334
335 /*-------------------------------------------------------------------------*/
336
337 /* Display the ports dedicated to the companion controller */
338 static ssize_t show_companion(struct device *dev,
339 struct device_attribute *attr,
340 char *buf)
341 {
342 struct ehci_hcd *ehci;
343 int nports, index, n;
344 int count = PAGE_SIZE;
345 char *ptr = buf;
346
347 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
348 nports = HCS_N_PORTS(ehci->hcs_params);
349
350 for (index = 0; index < nports; ++index) {
351 if (test_bit(index, &ehci->companion_ports)) {
352 n = scnprintf(ptr, count, "%d\n", index + 1);
353 ptr += n;
354 count -= n;
355 }
356 }
357 return ptr - buf;
358 }
359
360 /*
361 * Sets the owner of a port
362 */
363 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
364 {
365 u32 __iomem *status_reg;
366 u32 port_status;
367 int try;
368
369 status_reg = &ehci->regs->port_status[portnum];
370
371 /*
372 * The controller won't set the OWNER bit if the port is
373 * enabled, so this loop will sometimes require at least two
374 * iterations: one to disable the port and one to set OWNER.
375 */
376 for (try = 4; try > 0; --try) {
377 spin_lock_irq(&ehci->lock);
378 port_status = ehci_readl(ehci, status_reg);
379 if ((port_status & PORT_OWNER) == new_owner
380 || (port_status & (PORT_OWNER | PORT_CONNECT))
381 == 0)
382 try = 0;
383 else {
384 port_status ^= PORT_OWNER;
385 port_status &= ~(PORT_PE | PORT_RWC_BITS);
386 ehci_writel(ehci, port_status, status_reg);
387 }
388 spin_unlock_irq(&ehci->lock);
389 if (try > 1)
390 msleep(5);
391 }
392 }
393
394 /*
395 * Dedicate or undedicate a port to the companion controller.
396 * Syntax is "[-]portnum", where a leading '-' sign means
397 * return control of the port to the EHCI controller.
398 */
399 static ssize_t store_companion(struct device *dev,
400 struct device_attribute *attr,
401 const char *buf, size_t count)
402 {
403 struct ehci_hcd *ehci;
404 int portnum, new_owner;
405
406 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
407 new_owner = PORT_OWNER; /* Owned by companion */
408 if (sscanf(buf, "%d", &portnum) != 1)
409 return -EINVAL;
410 if (portnum < 0) {
411 portnum = - portnum;
412 new_owner = 0; /* Owned by EHCI */
413 }
414 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
415 return -ENOENT;
416 portnum--;
417 if (new_owner)
418 set_bit(portnum, &ehci->companion_ports);
419 else
420 clear_bit(portnum, &ehci->companion_ports);
421 set_owner(ehci, portnum, new_owner);
422 return count;
423 }
424 static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
425
426 static inline void create_companion_file(struct ehci_hcd *ehci)
427 {
428 int i;
429
430 /* with integrated TT there is no companion! */
431 if (!ehci_is_TDI(ehci))
432 i = device_create_file(ehci_to_hcd(ehci)->self.controller,
433 &dev_attr_companion);
434 }
435
436 static inline void remove_companion_file(struct ehci_hcd *ehci)
437 {
438 /* with integrated TT there is no companion! */
439 if (!ehci_is_TDI(ehci))
440 device_remove_file(ehci_to_hcd(ehci)->self.controller,
441 &dev_attr_companion);
442 }
443
444
445 /*-------------------------------------------------------------------------*/
446
447 static int check_reset_complete (
448 struct ehci_hcd *ehci,
449 int index,
450 u32 __iomem *status_reg,
451 int port_status
452 ) {
453 if (!(port_status & PORT_CONNECT))
454 return port_status;
455
456 /* if reset finished and it's still not enabled -- handoff */
457 if (!(port_status & PORT_PE)) {
458
459 /* with integrated TT, there's nobody to hand it to! */
460 if (ehci_is_TDI(ehci)) {
461 ehci_dbg (ehci,
462 "Failed to enable port %d on root hub TT\n",
463 index+1);
464 return port_status;
465 }
466
467 ehci_dbg (ehci, "port %d full speed --> companion\n",
468 index + 1);
469
470 // what happens if HCS_N_CC(params) == 0 ?
471 #if !defined(CONFIG_MACH_OMAP3EVM) && !defined(CONFIG_MACH_OMAP3517EVM)
472 port_status |= PORT_OWNER;
473 #endif
474 port_status &= ~PORT_RWC_BITS;
475 ehci_writel(ehci, port_status, status_reg);
476
477 /* ensure 440EPX ohci controller state is operational */
478 if (ehci->has_amcc_usb23)
479 set_ohci_hcfs(ehci, 1);
480 } else {
481 ehci_dbg (ehci, "port %d high speed\n", index + 1);
482 /* ensure 440EPx ohci controller state is suspended */
483 if (ehci->has_amcc_usb23)
484 set_ohci_hcfs(ehci, 0);
485 }
486
487 return port_status;
488 }
489
490 /*-------------------------------------------------------------------------*/
491
492
493 /* build "status change" packet (one or two bytes) from HC registers */
494
495 static int
496 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
497 {
498 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
499 u32 temp, status = 0;
500 u32 mask;
501 int ports, i, retval = 1;
502 unsigned long flags;
503
504 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
505 if (!HC_IS_RUNNING(hcd->state))
506 return 0;
507
508 /* init status to no-changes */
509 buf [0] = 0;
510 ports = HCS_N_PORTS (ehci->hcs_params);
511 if (ports > 7) {
512 buf [1] = 0;
513 retval++;
514 }
515
516 /* Some boards (mostly VIA?) report bogus overcurrent indications,
517 * causing massive log spam unless we completely ignore them. It
518 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
519 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
520 * PORT_POWER; that's surprising, but maybe within-spec.
521 */
522 if (!ignore_oc)
523 mask = PORT_CSC | PORT_PEC | PORT_OCC;
524 else
525 mask = PORT_CSC | PORT_PEC;
526 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
527
528 /* no hub change reports (bit 0) for now (power, ...) */
529
530 /* port N changes (bit N)? */
531 spin_lock_irqsave (&ehci->lock, flags);
532 for (i = 0; i < ports; i++) {
533 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
534
535 /*
536 * Return status information even for ports with OWNER set.
537 * Otherwise khubd wouldn't see the disconnect event when a
538 * high-speed device is switched over to the companion
539 * controller by the user.
540 */
541
542 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
543 || (ehci->reset_done[i] && time_after_eq(
544 jiffies, ehci->reset_done[i]))) {
545 if (i < 7)
546 buf [0] |= 1 << (i + 1);
547 else
548 buf [1] |= 1 << (i - 7);
549 status = STS_PCD;
550 }
551 }
552 /* FIXME autosuspend idle root hubs */
553 spin_unlock_irqrestore (&ehci->lock, flags);
554 return status ? retval : 0;
555 }
556
557 /*-------------------------------------------------------------------------*/
558
559 static void
560 ehci_hub_descriptor (
561 struct ehci_hcd *ehci,
562 struct usb_hub_descriptor *desc
563 ) {
564 int ports = HCS_N_PORTS (ehci->hcs_params);
565 u16 temp;
566
567 desc->bDescriptorType = 0x29;
568 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
569 desc->bHubContrCurrent = 0;
570
571 desc->bNbrPorts = ports;
572 temp = 1 + (ports / 8);
573 desc->bDescLength = 7 + 2 * temp;
574
575 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
576 memset (&desc->bitmap [0], 0, temp);
577 memset (&desc->bitmap [temp], 0xff, temp);
578
579 temp = 0x0008; /* per-port overcurrent reporting */
580 if (HCS_PPC (ehci->hcs_params))
581 temp |= 0x0001; /* per-port power control */
582 else
583 temp |= 0x0002; /* no power switching */
584 #if 0
585 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
586 if (HCS_INDICATOR (ehci->hcs_params))
587 temp |= 0x0080; /* per-port indicators (LEDs) */
588 #endif
589 desc->wHubCharacteristics = cpu_to_le16(temp);
590 }
591
592 /*-------------------------------------------------------------------------*/
593
594 static int ehci_hub_control (
595 struct usb_hcd *hcd,
596 u16 typeReq,
597 u16 wValue,
598 u16 wIndex,
599 char *buf,
600 u16 wLength
601 ) {
602 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
603 int ports = HCS_N_PORTS (ehci->hcs_params);
604 u32 __iomem *status_reg = &ehci->regs->port_status[
605 (wIndex & 0xff) - 1];
606 u32 __iomem *hostpc_reg = NULL;
607 u32 temp, temp1, status;
608 unsigned long flags;
609 int retval = 0;
610 unsigned selector;
611
612 /*
613 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
614 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
615 * (track current state ourselves) ... blink for diagnostics,
616 * power, "this is the one", etc. EHCI spec supports this.
617 */
618
619 if (ehci->has_hostpc)
620 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
621 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
622 spin_lock_irqsave (&ehci->lock, flags);
623 switch (typeReq) {
624 case ClearHubFeature:
625 switch (wValue) {
626 case C_HUB_LOCAL_POWER:
627 case C_HUB_OVER_CURRENT:
628 /* no hub-wide feature/status flags */
629 break;
630 default:
631 goto error;
632 }
633 break;
634 case ClearPortFeature:
635 if (!wIndex || wIndex > ports)
636 goto error;
637 wIndex--;
638 temp = ehci_readl(ehci, status_reg);
639
640 /*
641 * Even if OWNER is set, so the port is owned by the
642 * companion controller, khubd needs to be able to clear
643 * the port-change status bits (especially
644 * USB_PORT_FEAT_C_CONNECTION).
645 */
646
647 switch (wValue) {
648 case USB_PORT_FEAT_ENABLE:
649 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
650 break;
651 case USB_PORT_FEAT_C_ENABLE:
652 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
653 status_reg);
654 break;
655 case USB_PORT_FEAT_SUSPEND:
656 if (temp & PORT_RESET)
657 goto error;
658 if (ehci->no_selective_suspend)
659 break;
660 if (temp & PORT_SUSPEND) {
661 if ((temp & PORT_PE) == 0)
662 goto error;
663 /* resume signaling for 20 msec */
664 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
665 ehci_writel(ehci, temp | PORT_RESUME,
666 status_reg);
667 ehci->reset_done [wIndex] = jiffies
668 + msecs_to_jiffies (20);
669 }
670 break;
671 case USB_PORT_FEAT_C_SUSPEND:
672 clear_bit(wIndex, &ehci->port_c_suspend);
673 break;
674 case USB_PORT_FEAT_POWER:
675 if (HCS_PPC (ehci->hcs_params))
676 ehci_writel(ehci,
677 temp & ~(PORT_RWC_BITS | PORT_POWER),
678 status_reg);
679 break;
680 case USB_PORT_FEAT_C_CONNECTION:
681 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
682 status_reg);
683 break;
684 case USB_PORT_FEAT_C_OVER_CURRENT:
685 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
686 status_reg);
687 break;
688 case USB_PORT_FEAT_C_RESET:
689 /* GetPortStatus clears reset */
690 break;
691 default:
692 goto error;
693 }
694 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
695 break;
696 case GetHubDescriptor:
697 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
698 buf);
699 break;
700 case GetHubStatus:
701 /* no hub-wide feature/status flags */
702 memset (buf, 0, 4);
703 //cpu_to_le32s ((u32 *) buf);
704 break;
705 case GetPortStatus:
706 if (!wIndex || wIndex > ports)
707 goto error;
708 wIndex--;
709 status = 0;
710 temp = ehci_readl(ehci, status_reg);
711
712 // wPortChange bits
713 if (temp & PORT_CSC)
714 status |= 1 << USB_PORT_FEAT_C_CONNECTION;
715 if (temp & PORT_PEC)
716 status |= 1 << USB_PORT_FEAT_C_ENABLE;
717
718 if ((temp & PORT_OCC) && !ignore_oc){
719 status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
720
721 /*
722 * Hubs should disable port power on over-current.
723 * However, not all EHCI implementations do this
724 * automatically, even if they _do_ support per-port
725 * power switching; they're allowed to just limit the
726 * current. khubd will turn the power back on.
727 */
728 if (HCS_PPC (ehci->hcs_params)){
729 ehci_writel(ehci,
730 temp & ~(PORT_RWC_BITS | PORT_POWER),
731 status_reg);
732 }
733 }
734
735 /* whoever resumes must GetPortStatus to complete it!! */
736 if (temp & PORT_RESUME) {
737
738 /* Remote Wakeup received? */
739 if (!ehci->reset_done[wIndex]) {
740 /* resume signaling for 20 msec */
741 ehci->reset_done[wIndex] = jiffies
742 + msecs_to_jiffies(20);
743 /* check the port again */
744 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
745 ehci->reset_done[wIndex]);
746 }
747
748 /* resume completed? */
749 else if (time_after_eq(jiffies,
750 ehci->reset_done[wIndex])) {
751 clear_bit(wIndex, &ehci->suspended_ports);
752 set_bit(wIndex, &ehci->port_c_suspend);
753 ehci->reset_done[wIndex] = 0;
754
755 /* stop resume signaling */
756 temp = ehci_readl(ehci, status_reg);
757 ehci_writel(ehci,
758 temp & ~(PORT_RWC_BITS | PORT_RESUME),
759 status_reg);
760 retval = handshake(ehci, status_reg,
761 PORT_RESUME, 0, 2000 /* 2msec */);
762 if (retval != 0) {
763 ehci_err(ehci,
764 "port %d resume error %d\n",
765 wIndex + 1, retval);
766 goto error;
767 }
768 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
769 }
770 }
771
772 /* whoever resets must GetPortStatus to complete it!! */
773 if ((temp & PORT_RESET)
774 && time_after_eq(jiffies,
775 ehci->reset_done[wIndex])) {
776 status |= 1 << USB_PORT_FEAT_C_RESET;
777 ehci->reset_done [wIndex] = 0;
778
779 /* force reset to complete */
780 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
781 status_reg);
782 /* REVISIT: some hardware needs 550+ usec to clear
783 * this bit; seems too long to spin routinely...
784 */
785 retval = handshake(ehci, status_reg,
786 PORT_RESET, 0, 750);
787 if (retval != 0) {
788 ehci_err (ehci, "port %d reset error %d\n",
789 wIndex + 1, retval);
790 goto error;
791 }
792
793 /* see what we found out */
794 temp = check_reset_complete (ehci, wIndex, status_reg,
795 ehci_readl(ehci, status_reg));
796 }
797
798 if (!(temp & (PORT_RESUME|PORT_RESET)))
799 ehci->reset_done[wIndex] = 0;
800
801 /* transfer dedicated ports to the companion hc */
802 if ((temp & PORT_CONNECT) &&
803 test_bit(wIndex, &ehci->companion_ports)) {
804 temp &= ~PORT_RWC_BITS;
805 temp |= PORT_OWNER;
806 ehci_writel(ehci, temp, status_reg);
807 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
808 temp = ehci_readl(ehci, status_reg);
809 }
810
811 /*
812 * Even if OWNER is set, there's no harm letting khubd
813 * see the wPortStatus values (they should all be 0 except
814 * for PORT_POWER anyway).
815 */
816
817 if (temp & PORT_CONNECT) {
818 status |= 1 << USB_PORT_FEAT_CONNECTION;
819 // status may be from integrated TT
820 if (ehci->has_hostpc) {
821 temp1 = ehci_readl(ehci, hostpc_reg);
822 status |= ehci_port_speed(ehci, temp1);
823 } else
824 status |= ehci_port_speed(ehci, temp);
825 }
826 if (temp & PORT_PE)
827 status |= 1 << USB_PORT_FEAT_ENABLE;
828
829 /* maybe the port was unsuspended without our knowledge */
830 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
831 status |= 1 << USB_PORT_FEAT_SUSPEND;
832 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
833 clear_bit(wIndex, &ehci->suspended_ports);
834 ehci->reset_done[wIndex] = 0;
835 if (temp & PORT_PE)
836 set_bit(wIndex, &ehci->port_c_suspend);
837 }
838
839 if (temp & PORT_OC)
840 status |= 1 << USB_PORT_FEAT_OVER_CURRENT;
841 if (temp & PORT_RESET)
842 status |= 1 << USB_PORT_FEAT_RESET;
843 if (temp & PORT_POWER)
844 status |= 1 << USB_PORT_FEAT_POWER;
845 if (test_bit(wIndex, &ehci->port_c_suspend))
846 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
847
848 #ifndef VERBOSE_DEBUG
849 if (status & ~0xffff) /* only if wPortChange is interesting */
850 #endif
851 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
852 put_unaligned_le32(status, buf);
853 break;
854 case SetHubFeature:
855 switch (wValue) {
856 case C_HUB_LOCAL_POWER:
857 case C_HUB_OVER_CURRENT:
858 /* no hub-wide feature/status flags */
859 break;
860 default:
861 goto error;
862 }
863 break;
864 case SetPortFeature:
865 selector = wIndex >> 8;
866 wIndex &= 0xff;
867 if (unlikely(ehci->debug)) {
868 /* If the debug port is active any port
869 * feature requests should get denied */
870 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
871 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
872 retval = -ENODEV;
873 goto error_exit;
874 }
875 }
876 if (!wIndex || wIndex > ports)
877 goto error;
878 wIndex--;
879 temp = ehci_readl(ehci, status_reg);
880 if (temp & PORT_OWNER)
881 break;
882
883 temp &= ~PORT_RWC_BITS;
884 switch (wValue) {
885 case USB_PORT_FEAT_SUSPEND:
886 if (ehci->no_selective_suspend)
887 break;
888 if ((temp & PORT_PE) == 0
889 || (temp & PORT_RESET) != 0)
890 goto error;
891 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
892 /* After above check the port must be connected.
893 * Set appropriate bit thus could put phy into low power
894 * mode if we have hostpc feature
895 */
896 if (hostpc_reg) {
897 temp &= ~PORT_WKCONN_E;
898 temp |= (PORT_WKDISC_E | PORT_WKOC_E);
899 ehci_writel(ehci, temp | PORT_SUSPEND,
900 status_reg);
901 msleep(5);/* 5ms for HCD enter low pwr mode */
902 temp1 = ehci_readl(ehci, hostpc_reg);
903 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
904 hostpc_reg);
905 temp1 = ehci_readl(ehci, hostpc_reg);
906 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
907 wIndex, (temp1 & HOSTPC_PHCD) ?
908 "succeeded" : "failed");
909 }
910 set_bit(wIndex, &ehci->suspended_ports);
911 break;
912 case USB_PORT_FEAT_POWER:
913 if (HCS_PPC (ehci->hcs_params))
914 ehci_writel(ehci, temp | PORT_POWER,
915 status_reg);
916 break;
917 case USB_PORT_FEAT_RESET:
918 if (temp & PORT_RESUME)
919 goto error;
920 /* line status bits may report this as low speed,
921 * which can be fine if this root hub has a
922 * transaction translator built in.
923 */
924 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
925 && !ehci_is_TDI(ehci)
926 && PORT_USB11 (temp)) {
927 ehci_dbg (ehci,
928 "port %d low speed --> companion\n",
929 wIndex + 1);
930 #if !defined(CONFIG_MACH_OMAP3EVM) && !defined(CONFIG_MACH_OMAP3517EVM)
931 temp |= PORT_OWNER;
932 #endif
933 } else {
934 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
935 temp |= PORT_RESET;
936 temp &= ~PORT_PE;
937
938 /*
939 * caller must wait, then call GetPortStatus
940 * usb 2.0 spec says 50 ms resets on root
941 */
942 ehci->reset_done [wIndex] = jiffies
943 + msecs_to_jiffies (50);
944 }
945 ehci_writel(ehci, temp, status_reg);
946 break;
947
948 /* For downstream facing ports (these): one hub port is put
949 * into test mode according to USB2 11.24.2.13, then the hub
950 * must be reset (which for root hub now means rmmod+modprobe,
951 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
952 * about the EHCI-specific stuff.
953 */
954 case USB_PORT_FEAT_TEST:
955 if (!selector || selector > 5)
956 goto error;
957 ehci_quiesce(ehci);
958 ehci_halt(ehci);
959 temp |= selector << 16;
960 ehci_writel(ehci, temp, status_reg);
961 break;
962
963 default:
964 goto error;
965 }
966 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
967 break;
968
969 default:
970 error:
971 /* "stall" on error */
972 retval = -EPIPE;
973 }
974 error_exit:
975 spin_unlock_irqrestore (&ehci->lock, flags);
976 return retval;
977 }
978
979 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
980 {
981 #if !defined(CONFIG_MACH_OMAP3EVM) && !defined(CONFIG_MACH_OMAP3517EVM)
982 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
983
984 if (ehci_is_TDI(ehci))
985 return;
986 set_owner(ehci, --portnum, PORT_OWNER);
987 #endif
988 }
989
990 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
991 {
992 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
993 u32 __iomem *reg;
994
995 if (ehci_is_TDI(ehci))
996 return 0;
997 reg = &ehci->regs->port_status[portnum - 1];
998 return ehci_readl(ehci, reg) & PORT_OWNER;
999 }
Linux for Ginger Game Console