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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / usb / host / ohci-hub.c
blob48e4b11f4d3ea53a2d837636e5ae72de4a0724af
1 /*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
6 *
7 * This file is licenced under GPL
8 */
9
10 /*-------------------------------------------------------------------------*/
11
12 /*
13 * OHCI Root Hub ... the nonsharable stuff
14 */
15
16 #define dbg_port(hc,label,num,value) \
17 ohci_dbg (hc, \
18 "%s roothub.portstatus [%d] " \
19 "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
20 label, num, temp, \
21 (temp & RH_PS_PRSC) ? " PRSC" : "", \
22 (temp & RH_PS_OCIC) ? " OCIC" : "", \
23 (temp & RH_PS_PSSC) ? " PSSC" : "", \
24 (temp & RH_PS_PESC) ? " PESC" : "", \
25 (temp & RH_PS_CSC) ? " CSC" : "", \
26 \
27 (temp & RH_PS_LSDA) ? " LSDA" : "", \
28 (temp & RH_PS_PPS) ? " PPS" : "", \
29 (temp & RH_PS_PRS) ? " PRS" : "", \
30 (temp & RH_PS_POCI) ? " POCI" : "", \
31 (temp & RH_PS_PSS) ? " PSS" : "", \
32 \
33 (temp & RH_PS_PES) ? " PES" : "", \
34 (temp & RH_PS_CCS) ? " CCS" : "" \
35 );
36
37 /*-------------------------------------------------------------------------*/
38
39 /* hcd->hub_irq_enable() */
40 static void ohci_rhsc_enable (struct usb_hcd *hcd)
41 {
42 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
43
44 spin_lock_irq(&ohci->lock);
45 if (!ohci->autostop)
46 del_timer(&hcd->rh_timer); /* Prevent next poll */
47 ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable);
48 spin_unlock_irq(&ohci->lock);
49 }
50
51 #define OHCI_SCHED_ENABLES \
52 (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
53
54 static void dl_done_list (struct ohci_hcd *);
55 static void finish_unlinks (struct ohci_hcd *, u16);
56
57 #ifdef CONFIG_PM
58 static int ohci_rh_suspend (struct ohci_hcd *ohci, int autostop)
59 __releases(ohci->lock)
60 __acquires(ohci->lock)
61 {
62 int status = 0;
63
64 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
65 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
66 case OHCI_USB_RESUME:
67 ohci_dbg (ohci, "resume/suspend?\n");
68 ohci->hc_control &= ~OHCI_CTRL_HCFS;
69 ohci->hc_control |= OHCI_USB_RESET;
70 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
71 (void) ohci_readl (ohci, &ohci->regs->control);
72 /* FALL THROUGH */
73 case OHCI_USB_RESET:
74 status = -EBUSY;
75 ohci_dbg (ohci, "needs reinit!\n");
76 goto done;
77 case OHCI_USB_SUSPEND:
78 if (!ohci->autostop) {
79 ohci_dbg (ohci, "already suspended\n");
80 goto done;
81 }
82 }
83 ohci_dbg (ohci, "%s root hub\n",
84 autostop ? "auto-stop" : "suspend");
85
86 /* First stop any processing */
87 if (!autostop && (ohci->hc_control & OHCI_SCHED_ENABLES)) {
88 ohci->hc_control &= ~OHCI_SCHED_ENABLES;
89 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
90 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
91 ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus);
92
93 /* sched disables take effect on the next frame,
94 * then the last WDH could take 6+ msec
95 */
96 ohci_dbg (ohci, "stopping schedules ...\n");
97 ohci->autostop = 0;
98 spin_unlock_irq (&ohci->lock);
99 msleep (8);
100 spin_lock_irq (&ohci->lock);
101 }
102 dl_done_list (ohci);
103 finish_unlinks (ohci, ohci_frame_no(ohci));
104
105 /* maybe resume can wake root hub */
106 if (device_may_wakeup(&ohci_to_hcd(ohci)->self.root_hub->dev) ||
107 autostop)
108 ohci->hc_control |= OHCI_CTRL_RWE;
109 else {
110 ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrdisable);
111 ohci->hc_control &= ~OHCI_CTRL_RWE;
112 }
113
114 /* Suspend hub ... this is the "global (to this bus) suspend" mode,
115 * which doesn't imply ports will first be individually suspended.
116 */
117 ohci->hc_control &= ~OHCI_CTRL_HCFS;
118 ohci->hc_control |= OHCI_USB_SUSPEND;
119 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
120 (void) ohci_readl (ohci, &ohci->regs->control);
121
122 /* no resumes until devices finish suspending */
123 if (!autostop) {
124 ohci->next_statechange = jiffies + msecs_to_jiffies (5);
125 ohci->autostop = 0;
126 }
127
128 done:
129 return status;
130 }
131
132 static inline struct ed *find_head (struct ed *ed)
133 {
134 /* for bulk and control lists */
135 while (ed->ed_prev)
136 ed = ed->ed_prev;
137 return ed;
138 }
139
140 /* caller has locked the root hub */
141 static int ohci_rh_resume (struct ohci_hcd *ohci)
142 __releases(ohci->lock)
143 __acquires(ohci->lock)
144 {
145 struct usb_hcd *hcd = ohci_to_hcd (ohci);
146 u32 temp, enables;
147 int status = -EINPROGRESS;
148 int autostopped = ohci->autostop;
149
150 ohci->autostop = 0;
151 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
152
153 if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
154 /* this can happen after resuming a swsusp snapshot */
155 if (hcd->state == HC_STATE_RESUMING) {
156 ohci_dbg (ohci, "BIOS/SMM active, control %03x\n",
157 ohci->hc_control);
158 status = -EBUSY;
159 /* this happens when pmcore resumes HC then root */
160 } else {
161 ohci_dbg (ohci, "duplicate resume\n");
162 status = 0;
163 }
164 } else switch (ohci->hc_control & OHCI_CTRL_HCFS) {
165 case OHCI_USB_SUSPEND:
166 ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
167 ohci->hc_control |= OHCI_USB_RESUME;
168 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
169 (void) ohci_readl (ohci, &ohci->regs->control);
170 ohci_dbg (ohci, "%s root hub\n",
171 autostopped ? "auto-start" : "resume");
172 break;
173 case OHCI_USB_RESUME:
174 /* HCFS changes sometime after INTR_RD */
175 ohci_dbg(ohci, "%swakeup root hub\n",
176 autostopped ? "auto-" : "");
177 break;
178 case OHCI_USB_OPER:
179 /* this can happen after resuming a swsusp snapshot */
180 ohci_dbg (ohci, "snapshot resume? reinit\n");
181 status = -EBUSY;
182 break;
183 default: /* RESET, we lost power */
184 ohci_dbg (ohci, "lost power\n");
185 status = -EBUSY;
186 }
187 if (status == -EBUSY) {
188 if (!autostopped) {
189 spin_unlock_irq (&ohci->lock);
190 (void) ohci_init (ohci);
191 status = ohci_restart (ohci);
192
193 usb_root_hub_lost_power(hcd->self.root_hub);
194
195 spin_lock_irq (&ohci->lock);
196 }
197 return status;
198 }
199 if (status != -EINPROGRESS)
200 return status;
201 if (autostopped)
202 goto skip_resume;
203 spin_unlock_irq (&ohci->lock);
204
205 /* Some controllers (lucent erratum) need extra-long delays */
206 msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
207
208 temp = ohci_readl (ohci, &ohci->regs->control);
209 temp &= OHCI_CTRL_HCFS;
210 if (temp != OHCI_USB_RESUME) {
211 ohci_err (ohci, "controller won't resume\n");
212 spin_lock_irq(&ohci->lock);
213 return -EBUSY;
214 }
215
216 /* disable old schedule state, reinit from scratch */
217 ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
218 ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent);
219 ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
220 ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent);
221 ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent);
222 ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
223
224 /* Sometimes PCI D3 suspend trashes frame timings ... */
225 periodic_reinit (ohci);
226
227 /* the following code is executed with ohci->lock held and
228 * irqs disabled if and only if autostopped is true
229 */
230
231 skip_resume:
232 /* interrupts might have been disabled */
233 ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable);
234 if (ohci->ed_rm_list)
235 ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable);
236
237 /* Then re-enable operations */
238 ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control);
239 (void) ohci_readl (ohci, &ohci->regs->control);
240 if (!autostopped)
241 msleep (3);
242
243 temp = ohci->hc_control;
244 temp &= OHCI_CTRL_RWC;
245 temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
246 ohci->hc_control = temp;
247 ohci_writel (ohci, temp, &ohci->regs->control);
248 (void) ohci_readl (ohci, &ohci->regs->control);
249
250 /* TRSMRCY */
251 if (!autostopped) {
252 msleep (10);
253 spin_lock_irq (&ohci->lock);
254 }
255 /* now ohci->lock is always held and irqs are always disabled */
256
257 /* keep it alive for more than ~5x suspend + resume costs */
258 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
259
260 /* maybe turn schedules back on */
261 enables = 0;
262 temp = 0;
263 if (!ohci->ed_rm_list) {
264 if (ohci->ed_controltail) {
265 ohci_writel (ohci,
266 find_head (ohci->ed_controltail)->dma,
267 &ohci->regs->ed_controlhead);
268 enables |= OHCI_CTRL_CLE;
269 temp |= OHCI_CLF;
270 }
271 if (ohci->ed_bulktail) {
272 ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma,
273 &ohci->regs->ed_bulkhead);
274 enables |= OHCI_CTRL_BLE;
275 temp |= OHCI_BLF;
276 }
277 }
278 if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
279 enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
280 if (enables) {
281 ohci_dbg (ohci, "restarting schedules ... %08x\n", enables);
282 ohci->hc_control |= enables;
283 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
284 if (temp)
285 ohci_writel (ohci, temp, &ohci->regs->cmdstatus);
286 (void) ohci_readl (ohci, &ohci->regs->control);
287 }
288
289 return 0;
290 }
291
292 static int ohci_bus_suspend (struct usb_hcd *hcd)
293 {
294 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
295 int rc;
296
297 spin_lock_irq (&ohci->lock);
298
299 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
300 rc = -ESHUTDOWN;
301 else
302 rc = ohci_rh_suspend (ohci, 0);
303 spin_unlock_irq (&ohci->lock);
304 return rc;
305 }
306
307 static int ohci_bus_resume (struct usb_hcd *hcd)
308 {
309 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
310 int rc;
311
312 if (time_before (jiffies, ohci->next_statechange))
313 msleep(5);
314
315 spin_lock_irq (&ohci->lock);
316
317 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
318 rc = -ESHUTDOWN;
319 else
320 rc = ohci_rh_resume (ohci);
321 spin_unlock_irq (&ohci->lock);
322
323 /* poll until we know a device is connected or we autostop */
324 if (rc == 0)
325 usb_hcd_poll_rh_status(hcd);
326 return rc;
327 }
328
329 /* Carry out polling-, autostop-, and autoresume-related state changes */
330 static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
331 int any_connected)
332 {
333 int poll_rh = 1;
334
335 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
336
337 case OHCI_USB_OPER:
338 /* keep on polling until we know a device is connected
339 * and RHSC is enabled */
340 if (!ohci->autostop) {
341 if (any_connected ||
342 !device_may_wakeup(&ohci_to_hcd(ohci)
343 ->self.root_hub->dev)) {
344 if (ohci_readl(ohci, &ohci->regs->intrenable) &
345 OHCI_INTR_RHSC)
346 poll_rh = 0;
347 } else {
348 ohci->autostop = 1;
349 ohci->next_statechange = jiffies + HZ;
350 }
351
352 /* if no devices have been attached for one second, autostop */
353 } else {
354 if (changed || any_connected) {
355 ohci->autostop = 0;
356 ohci->next_statechange = jiffies +
357 STATECHANGE_DELAY;
358 } else if (time_after_eq(jiffies,
359 ohci->next_statechange)
360 && !ohci->ed_rm_list
361 && !(ohci->hc_control &
362 OHCI_SCHED_ENABLES)) {
363 ohci_rh_suspend(ohci, 1);
364 }
365 }
366 break;
367
368 /* if there is a port change, autostart or ask to be resumed */
369 case OHCI_USB_SUSPEND:
370 case OHCI_USB_RESUME:
371 if (changed) {
372 if (ohci->autostop)
373 ohci_rh_resume(ohci);
374 else
375 usb_hcd_resume_root_hub(ohci_to_hcd(ohci));
376 } else {
377 /* everything is idle, no need for polling */
378 poll_rh = 0;
379 }
380 break;
381 }
382 return poll_rh;
383 }
384
385 #else /* CONFIG_PM */
386
387 static inline int ohci_rh_resume(struct ohci_hcd *ohci)
388 {
389 return 0;
390 }
391
392 /* Carry out polling-related state changes.
393 * autostop isn't used when CONFIG_PM is turned off.
394 */
395 static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
396 int any_connected)
397 {
398 int poll_rh = 1;
399
400 /* keep on polling until RHSC is enabled */
401 if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC)
402 poll_rh = 0;
403 return poll_rh;
404 }
405
406 #endif /* CONFIG_PM */
407
408 /*-------------------------------------------------------------------------*/
409
410 /* build "status change" packet (one or two bytes) from HC registers */
411
412 static int
413 ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
414 {
415 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
416 int i, changed = 0, length = 1;
417 int any_connected = 0;
418 unsigned long flags;
419
420 spin_lock_irqsave (&ohci->lock, flags);
421 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
422 goto done;
423
424 /* undocumented erratum seen on at least rev D */
425 if ((ohci->flags & OHCI_QUIRK_AMD756)
426 && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) {
427 ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n",
428 ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP);
429 /* retry later; "should not happen" */
430 goto done;
431 }
432
433 /* init status */
434 if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
435 buf [0] = changed = 1;
436 else
437 buf [0] = 0;
438 if (ohci->num_ports > 7) {
439 buf [1] = 0;
440 length++;
441 }
442
443 /* look at each port */
444 for (i = 0; i < ohci->num_ports; i++) {
445 u32 status = roothub_portstatus (ohci, i);
446
447 /* can't autostop if ports are connected */
448 any_connected |= (status & RH_PS_CCS);
449
450 if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
451 | RH_PS_OCIC | RH_PS_PRSC)) {
452 changed = 1;
453 if (i < 7)
454 buf [0] |= 1 << (i + 1);
455 else
456 buf [1] |= 1 << (i - 7);
457 }
458 }
459
460 hcd->poll_rh = ohci_root_hub_state_changes(ohci, changed,
461 any_connected);
462
463 done:
464 spin_unlock_irqrestore (&ohci->lock, flags);
465
466 return changed ? length : 0;
467 }
468
469 /*-------------------------------------------------------------------------*/
470
471 static void
472 ohci_hub_descriptor (
473 struct ohci_hcd *ohci,
474 struct usb_hub_descriptor *desc
475 ) {
476 u32 rh = roothub_a (ohci);
477 u16 temp;
478
479 desc->bDescriptorType = 0x29;
480 desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24;
481 desc->bHubContrCurrent = 0;
482
483 desc->bNbrPorts = ohci->num_ports;
484 temp = 1 + (ohci->num_ports / 8);
485 desc->bDescLength = 7 + 2 * temp;
486
487 temp = 0;
488 if (rh & RH_A_NPS) /* no power switching? */
489 temp |= 0x0002;
490 if (rh & RH_A_PSM) /* per-port power switching? */
491 temp |= 0x0001;
492 if (rh & RH_A_NOCP) /* no overcurrent reporting? */
493 temp |= 0x0010;
494 else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */
495 temp |= 0x0008;
496 desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp);
497
498 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
499 rh = roothub_b (ohci);
500 memset(desc->bitmap, 0xff, sizeof(desc->bitmap));
501 desc->bitmap [0] = rh & RH_B_DR;
502 if (ohci->num_ports > 7) {
503 desc->bitmap [1] = (rh & RH_B_DR) >> 8;
504 desc->bitmap [2] = 0xff;
505 } else
506 desc->bitmap [1] = 0xff;
507 }
508
509 /*-------------------------------------------------------------------------*/
510
511 #ifdef CONFIG_USB_OTG
512
513 static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port)
514 {
515 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
516 u32 status;
517
518 if (!port)
519 return -EINVAL;
520 port--;
521
522 /* start port reset before HNP protocol times out */
523 status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]);
524 if (!(status & RH_PS_CCS))
525 return -ENODEV;
526
527 /* khubd will finish the reset later */
528 ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]);
529 return 0;
530 }
531
532 static void start_hnp(struct ohci_hcd *ohci);
533
534 #else
535
536 #define ohci_start_port_reset NULL
537
538 #endif
539
540 /*-------------------------------------------------------------------------*/
541
542
543 /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
544 * not necessarily continuous ... to guard against resume signaling.
545 * The short timeout is safe for non-root hubs, and is backward-compatible
546 * with earlier Linux hosts.
547 */
548 #ifdef CONFIG_USB_SUSPEND
549 #define PORT_RESET_MSEC 50
550 #else
551 #define PORT_RESET_MSEC 10
552 #endif
553
554 /* this timer value might be vendor-specific ... */
555 #define PORT_RESET_HW_MSEC 10
556
557 /* wrap-aware logic morphed from <linux/jiffies.h> */
558 #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
559
560 /* called from some task, normally khubd */
561 static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port)
562 {
563 __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port];
564 u32 temp;
565 u16 now = ohci_readl(ohci, &ohci->regs->fmnumber);
566 u16 reset_done = now + PORT_RESET_MSEC;
567
568 /* build a "continuous enough" reset signal, with up to
569 * 3msec gap between pulses. scheduler HZ==100 must work;
570 * this might need to be deadline-scheduled.
571 */
572 do {
573 /* spin until any current reset finishes */
574 for (;;) {
575 temp = ohci_readl (ohci, portstat);
576 /* handle e.g. CardBus eject */
577 if (temp == ~(u32)0)
578 return -ESHUTDOWN;
579 if (!(temp & RH_PS_PRS))
580 break;
581 udelay (500);
582 }
583
584 if (!(temp & RH_PS_CCS))
585 break;
586 if (temp & RH_PS_PRSC)
587 ohci_writel (ohci, RH_PS_PRSC, portstat);
588
589 /* start the next reset, sleep till it's probably done */
590 ohci_writel (ohci, RH_PS_PRS, portstat);
591 msleep(PORT_RESET_HW_MSEC);
592 now = ohci_readl(ohci, &ohci->regs->fmnumber);
593 } while (tick_before(now, reset_done));
594 /* caller synchronizes using PRSC */
595
596 return 0;
597 }
598
599 static int ohci_hub_control (
600 struct usb_hcd *hcd,
601 u16 typeReq,
602 u16 wValue,
603 u16 wIndex,
604 char *buf,
605 u16 wLength
606 ) {
607 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
608 int ports = hcd_to_bus (hcd)->root_hub->maxchild;
609 u32 temp;
610 int retval = 0;
611
612 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
613 return -ESHUTDOWN;
614
615 switch (typeReq) {
616 case ClearHubFeature:
617 switch (wValue) {
618 case C_HUB_OVER_CURRENT:
619 ohci_writel (ohci, RH_HS_OCIC,
620 &ohci->regs->roothub.status);
621 case C_HUB_LOCAL_POWER:
622 break;
623 default:
624 goto error;
625 }
626 break;
627 case ClearPortFeature:
628 if (!wIndex || wIndex > ports)
629 goto error;
630 wIndex--;
631
632 switch (wValue) {
633 case USB_PORT_FEAT_ENABLE:
634 temp = RH_PS_CCS;
635 break;
636 case USB_PORT_FEAT_C_ENABLE:
637 temp = RH_PS_PESC;
638 break;
639 case USB_PORT_FEAT_SUSPEND:
640 temp = RH_PS_POCI;
641 break;
642 case USB_PORT_FEAT_C_SUSPEND:
643 temp = RH_PS_PSSC;
644 break;
645 case USB_PORT_FEAT_POWER:
646 temp = RH_PS_LSDA;
647 break;
648 case USB_PORT_FEAT_C_CONNECTION:
649 temp = RH_PS_CSC;
650 break;
651 case USB_PORT_FEAT_C_OVER_CURRENT:
652 temp = RH_PS_OCIC;
653 break;
654 case USB_PORT_FEAT_C_RESET:
655 temp = RH_PS_PRSC;
656 break;
657 default:
658 goto error;
659 }
660 ohci_writel (ohci, temp,
661 &ohci->regs->roothub.portstatus [wIndex]);
662 // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]);
663 break;
664 case GetHubDescriptor:
665 ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf);
666 break;
667 case GetHubStatus:
668 temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE);
669 put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
670 break;
671 case GetPortStatus:
672 if (!wIndex || wIndex > ports)
673 goto error;
674 wIndex--;
675 temp = roothub_portstatus (ohci, wIndex);
676 put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
677
678 #ifndef OHCI_VERBOSE_DEBUG
679 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
680 #endif
681 dbg_port (ohci, "GetStatus", wIndex, temp);
682 break;
683 case SetHubFeature:
684 switch (wValue) {
685 case C_HUB_OVER_CURRENT:
686 // FIXME: this can be cleared, yes?
687 case C_HUB_LOCAL_POWER:
688 break;
689 default:
690 goto error;
691 }
692 break;
693 case SetPortFeature:
694 if (!wIndex || wIndex > ports)
695 goto error;
696 wIndex--;
697 switch (wValue) {
698 case USB_PORT_FEAT_SUSPEND:
699 #ifdef CONFIG_USB_OTG
700 if (hcd->self.otg_port == (wIndex + 1)
701 && hcd->self.b_hnp_enable)
702 start_hnp(ohci);
703 else
704 #endif
705 ohci_writel (ohci, RH_PS_PSS,
706 &ohci->regs->roothub.portstatus [wIndex]);
707 break;
708 case USB_PORT_FEAT_POWER:
709 ohci_writel (ohci, RH_PS_PPS,
710 &ohci->regs->roothub.portstatus [wIndex]);
711 break;
712 case USB_PORT_FEAT_RESET:
713 retval = root_port_reset (ohci, wIndex);
714 break;
715 default:
716 goto error;
717 }
718 break;
719
720 default:
721 error:
722 /* "protocol stall" on error */
723 retval = -EPIPE;
724 }
725 return retval;
726 }
727
WRT350N Kernel Patches