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usbcore: remove usb_suspend_root_hub
[linux-2.6/verdex.git] / drivers / usb / host / ohci-hub.c
blob0b899339cac807e58c98a3377e8b3fbae0bab2f1
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 ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable);
45 }
46
47 #ifdef CONFIG_PM
48
49 #define OHCI_SCHED_ENABLES \
50 (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
51
52 static void dl_done_list (struct ohci_hcd *, struct pt_regs *);
53 static void finish_unlinks (struct ohci_hcd *, u16 , struct pt_regs *);
54 static int ohci_restart (struct ohci_hcd *ohci);
55
56 static int ohci_bus_suspend (struct usb_hcd *hcd)
57 {
58 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
59 int status = 0;
60 unsigned long flags;
61
62 spin_lock_irqsave (&ohci->lock, flags);
63
64 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
65 spin_unlock_irqrestore (&ohci->lock, flags);
66 return -ESHUTDOWN;
67 }
68
69 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
70 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
71 case OHCI_USB_RESUME:
72 ohci_dbg (ohci, "resume/suspend?\n");
73 ohci->hc_control &= ~OHCI_CTRL_HCFS;
74 ohci->hc_control |= OHCI_USB_RESET;
75 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
76 (void) ohci_readl (ohci, &ohci->regs->control);
77 /* FALL THROUGH */
78 case OHCI_USB_RESET:
79 status = -EBUSY;
80 ohci_dbg (ohci, "needs reinit!\n");
81 goto done;
82 case OHCI_USB_SUSPEND:
83 ohci_dbg (ohci, "already suspended\n");
84 goto done;
85 }
86 ohci_dbg (ohci, "suspend root hub\n");
87
88 /* First stop any processing */
89 if (ohci->hc_control & OHCI_SCHED_ENABLES) {
90 int limit;
91
92 ohci->hc_control &= ~OHCI_SCHED_ENABLES;
93 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
94 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
95 ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus);
96
97 /* sched disables take effect on the next frame,
98 * then the last WDH could take 6+ msec
99 */
100 ohci_dbg (ohci, "stopping schedules ...\n");
101 limit = 2000;
102 while (limit > 0) {
103 udelay (250);
104 limit =- 250;
105 if (ohci_readl (ohci, &ohci->regs->intrstatus)
106 & OHCI_INTR_SF)
107 break;
108 }
109 dl_done_list (ohci, NULL);
110 mdelay (7);
111 }
112 dl_done_list (ohci, NULL);
113 finish_unlinks (ohci, ohci_frame_no(ohci), NULL);
114 ohci_writel (ohci, ohci_readl (ohci, &ohci->regs->intrstatus),
115 &ohci->regs->intrstatus);
116
117 /* maybe resume can wake root hub */
118 if (device_may_wakeup(&ohci_to_hcd(ohci)->self.root_hub->dev))
119 ohci->hc_control |= OHCI_CTRL_RWE;
120 else
121 ohci->hc_control &= ~OHCI_CTRL_RWE;
122
123 /* Suspend hub ... this is the "global (to this bus) suspend" mode,
124 * which doesn't imply ports will first be individually suspended.
125 */
126 ohci->hc_control &= ~OHCI_CTRL_HCFS;
127 ohci->hc_control |= OHCI_USB_SUSPEND;
128 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
129 (void) ohci_readl (ohci, &ohci->regs->control);
130
131 /* no resumes until devices finish suspending */
132 ohci->next_statechange = jiffies + msecs_to_jiffies (5);
133
134 /* no timer polling */
135 hcd->poll_rh = 0;
136
137 done:
138 spin_unlock_irqrestore (&ohci->lock, flags);
139 return status;
140 }
141
142 static inline struct ed *find_head (struct ed *ed)
143 {
144 /* for bulk and control lists */
145 while (ed->ed_prev)
146 ed = ed->ed_prev;
147 return ed;
148 }
149
150 /* caller has locked the root hub */
151 static int ohci_bus_resume (struct usb_hcd *hcd)
152 {
153 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
154 u32 temp, enables;
155 int status = -EINPROGRESS;
156 unsigned long flags;
157
158 if (time_before (jiffies, ohci->next_statechange))
159 msleep(5);
160
161 spin_lock_irqsave (&ohci->lock, flags);
162
163 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
164 spin_unlock_irqrestore (&ohci->lock, flags);
165 return -ESHUTDOWN;
166 }
167
168
169 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
170
171 if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
172 /* this can happen after resuming a swsusp snapshot */
173 if (hcd->state == HC_STATE_RESUMING) {
174 ohci_dbg (ohci, "BIOS/SMM active, control %03x\n",
175 ohci->hc_control);
176 status = -EBUSY;
177 /* this happens when pmcore resumes HC then root */
178 } else {
179 ohci_dbg (ohci, "duplicate resume\n");
180 status = 0;
181 }
182 } else switch (ohci->hc_control & OHCI_CTRL_HCFS) {
183 case OHCI_USB_SUSPEND:
184 ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
185 ohci->hc_control |= OHCI_USB_RESUME;
186 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
187 (void) ohci_readl (ohci, &ohci->regs->control);
188 ohci_dbg (ohci, "resume root hub\n");
189 break;
190 case OHCI_USB_RESUME:
191 /* HCFS changes sometime after INTR_RD */
192 ohci_info (ohci, "wakeup\n");
193 break;
194 case OHCI_USB_OPER:
195 /* this can happen after resuming a swsusp snapshot */
196 ohci_dbg (ohci, "snapshot resume? reinit\n");
197 status = -EBUSY;
198 break;
199 default: /* RESET, we lost power */
200 ohci_dbg (ohci, "lost power\n");
201 status = -EBUSY;
202 }
203 spin_unlock_irqrestore (&ohci->lock, flags);
204 if (status == -EBUSY) {
205 (void) ohci_init (ohci);
206 return ohci_restart (ohci);
207 }
208 if (status != -EINPROGRESS)
209 return status;
210
211 temp = ohci->num_ports;
212 enables = 0;
213 while (temp--) {
214 u32 stat = ohci_readl (ohci,
215 &ohci->regs->roothub.portstatus [temp]);
216
217 /* force global, not selective, resume */
218 if (!(stat & RH_PS_PSS))
219 continue;
220 ohci_writel (ohci, RH_PS_POCI,
221 &ohci->regs->roothub.portstatus [temp]);
222 }
223
224 /* Some controllers (lucent erratum) need extra-long delays */
225 msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
226
227 temp = ohci_readl (ohci, &ohci->regs->control);
228 temp &= OHCI_CTRL_HCFS;
229 if (temp != OHCI_USB_RESUME) {
230 ohci_err (ohci, "controller won't resume\n");
231 return -EBUSY;
232 }
233
234 /* disable old schedule state, reinit from scratch */
235 ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
236 ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent);
237 ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
238 ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent);
239 ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent);
240 ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
241
242 /* Sometimes PCI D3 suspend trashes frame timings ... */
243 periodic_reinit (ohci);
244
245 /* interrupts might have been disabled */
246 ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable);
247 if (ohci->ed_rm_list)
248 ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable);
249 ohci_writel (ohci, ohci_readl (ohci, &ohci->regs->intrstatus),
250 &ohci->regs->intrstatus);
251
252 /* Then re-enable operations */
253 ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control);
254 (void) ohci_readl (ohci, &ohci->regs->control);
255 msleep (3);
256
257 temp = ohci->hc_control;
258 temp &= OHCI_CTRL_RWC;
259 temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
260 ohci->hc_control = temp;
261 ohci_writel (ohci, temp, &ohci->regs->control);
262 (void) ohci_readl (ohci, &ohci->regs->control);
263
264 /* TRSMRCY */
265 msleep (10);
266
267 /* keep it alive for more than ~5x suspend + resume costs */
268 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
269
270 /* maybe turn schedules back on */
271 enables = 0;
272 temp = 0;
273 if (!ohci->ed_rm_list) {
274 if (ohci->ed_controltail) {
275 ohci_writel (ohci,
276 find_head (ohci->ed_controltail)->dma,
277 &ohci->regs->ed_controlhead);
278 enables |= OHCI_CTRL_CLE;
279 temp |= OHCI_CLF;
280 }
281 if (ohci->ed_bulktail) {
282 ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma,
283 &ohci->regs->ed_bulkhead);
284 enables |= OHCI_CTRL_BLE;
285 temp |= OHCI_BLF;
286 }
287 }
288 if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
289 enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
290 if (enables) {
291 ohci_dbg (ohci, "restarting schedules ... %08x\n", enables);
292 ohci->hc_control |= enables;
293 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
294 if (temp)
295 ohci_writel (ohci, temp, &ohci->regs->cmdstatus);
296 (void) ohci_readl (ohci, &ohci->regs->control);
297 }
298
299 return 0;
300 }
301
302 #endif /* CONFIG_PM */
303
304 /*-------------------------------------------------------------------------*/
305
306 /* build "status change" packet (one or two bytes) from HC registers */
307
308 static int
309 ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
310 {
311 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
312 int i, changed = 0, length = 1;
313 int can_suspend;
314 unsigned long flags;
315
316 can_suspend = device_may_wakeup(&hcd->self.root_hub->dev);
317 spin_lock_irqsave (&ohci->lock, flags);
318
319 /* handle autosuspended root: finish resuming before
320 * letting khubd or root hub timer see state changes.
321 */
322 if (unlikely((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
323 || !HC_IS_RUNNING(hcd->state))) {
324 can_suspend = 0;
325 goto done;
326 }
327
328 /* undocumented erratum seen on at least rev D */
329 if ((ohci->flags & OHCI_QUIRK_AMD756)
330 && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) {
331 ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n",
332 ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP);
333 /* retry later; "should not happen" */
334 goto done;
335 }
336
337 /* init status */
338 if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
339 buf [0] = changed = 1;
340 else
341 buf [0] = 0;
342 if (ohci->num_ports > 7) {
343 buf [1] = 0;
344 length++;
345 }
346
347 /* look at each port */
348 for (i = 0; i < ohci->num_ports; i++) {
349 u32 status = roothub_portstatus (ohci, i);
350
351 /* can't autosuspend with active ports */
352 if ((status & RH_PS_PES) && !(status & RH_PS_PSS))
353 can_suspend = 0;
354
355 if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
356 | RH_PS_OCIC | RH_PS_PRSC)) {
357 changed = 1;
358 if (i < 7)
359 buf [0] |= 1 << (i + 1);
360 else
361 buf [1] |= 1 << (i - 7);
362 continue;
363 }
364 }
365
366 /* after root hub changes, stop polling after debouncing
367 * for a while and maybe kicking in autosuspend
368 */
369 if (changed) {
370 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
371 can_suspend = 0;
372 } else if (time_before (jiffies, ohci->next_statechange)) {
373 can_suspend = 0;
374 } else {
375 #ifdef CONFIG_PM
376 can_suspend = can_suspend
377 && !ohci->ed_rm_list
378 && ((OHCI_CTRL_HCFS | OHCI_SCHED_ENABLES)
379 & ohci->hc_control)
380 == OHCI_USB_OPER;
381 #endif
382 if (hcd->uses_new_polling) {
383 hcd->poll_rh = 0;
384 /* use INTR_RHSC iff INTR_RD won't apply */
385 if (!can_suspend)
386 ohci_writel (ohci, OHCI_INTR_RHSC,
387 &ohci->regs->intrenable);
388 }
389 }
390
391 done:
392 spin_unlock_irqrestore (&ohci->lock, flags);
393
394 #ifdef CONFIG_PM
395 /* save power by autosuspending idle root hubs;
396 * INTR_RD wakes us when there's work
397 */
398 if (can_suspend && usb_trylock_device (hcd->self.root_hub) == 0) {
399 ohci_vdbg (ohci, "autosuspend\n");
400 (void) ohci_bus_suspend (hcd);
401 usb_unlock_device (hcd->self.root_hub);
402 }
403 #endif
404
405 return changed ? length : 0;
406 }
407
408 /*-------------------------------------------------------------------------*/
409
410 static void
411 ohci_hub_descriptor (
412 struct ohci_hcd *ohci,
413 struct usb_hub_descriptor *desc
414 ) {
415 u32 rh = roothub_a (ohci);
416 u16 temp;
417
418 desc->bDescriptorType = 0x29;
419 desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24;
420 desc->bHubContrCurrent = 0;
421
422 desc->bNbrPorts = ohci->num_ports;
423 temp = 1 + (ohci->num_ports / 8);
424 desc->bDescLength = 7 + 2 * temp;
425
426 temp = 0;
427 if (rh & RH_A_NPS) /* no power switching? */
428 temp |= 0x0002;
429 if (rh & RH_A_PSM) /* per-port power switching? */
430 temp |= 0x0001;
431 if (rh & RH_A_NOCP) /* no overcurrent reporting? */
432 temp |= 0x0010;
433 else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */
434 temp |= 0x0008;
435 desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp);
436
437 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
438 rh = roothub_b (ohci);
439 memset(desc->bitmap, 0xff, sizeof(desc->bitmap));
440 desc->bitmap [0] = rh & RH_B_DR;
441 if (ohci->num_ports > 7) {
442 desc->bitmap [1] = (rh & RH_B_DR) >> 8;
443 desc->bitmap [2] = 0xff;
444 } else
445 desc->bitmap [1] = 0xff;
446 }
447
448 /*-------------------------------------------------------------------------*/
449
450 #ifdef CONFIG_USB_OTG
451
452 static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port)
453 {
454 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
455 u32 status;
456
457 if (!port)
458 return -EINVAL;
459 port--;
460
461 /* start port reset before HNP protocol times out */
462 status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]);
463 if (!(status & RH_PS_CCS))
464 return -ENODEV;
465
466 /* khubd will finish the reset later */
467 ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]);
468 return 0;
469 }
470
471 static void start_hnp(struct ohci_hcd *ohci);
472
473 #else
474
475 #define ohci_start_port_reset NULL
476
477 #endif
478
479 /*-------------------------------------------------------------------------*/
480
481
482 /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
483 * not necessarily continuous ... to guard against resume signaling.
484 * The short timeout is safe for non-root hubs, and is backward-compatible
485 * with earlier Linux hosts.
486 */
487 #ifdef CONFIG_USB_SUSPEND
488 #define PORT_RESET_MSEC 50
489 #else
490 #define PORT_RESET_MSEC 10
491 #endif
492
493 /* this timer value might be vendor-specific ... */
494 #define PORT_RESET_HW_MSEC 10
495
496 /* wrap-aware logic morphed from <linux/jiffies.h> */
497 #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
498
499 /* called from some task, normally khubd */
500 static inline void root_port_reset (struct ohci_hcd *ohci, unsigned port)
501 {
502 __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port];
503 u32 temp;
504 u16 now = ohci_readl(ohci, &ohci->regs->fmnumber);
505 u16 reset_done = now + PORT_RESET_MSEC;
506
507 /* build a "continuous enough" reset signal, with up to
508 * 3msec gap between pulses. scheduler HZ==100 must work;
509 * this might need to be deadline-scheduled.
510 */
511 do {
512 /* spin until any current reset finishes */
513 for (;;) {
514 temp = ohci_readl (ohci, portstat);
515 if (!(temp & RH_PS_PRS))
516 break;
517 udelay (500);
518 }
519
520 if (!(temp & RH_PS_CCS))
521 break;
522 if (temp & RH_PS_PRSC)
523 ohci_writel (ohci, RH_PS_PRSC, portstat);
524
525 /* start the next reset, sleep till it's probably done */
526 ohci_writel (ohci, RH_PS_PRS, portstat);
527 msleep(PORT_RESET_HW_MSEC);
528 now = ohci_readl(ohci, &ohci->regs->fmnumber);
529 } while (tick_before(now, reset_done));
530 /* caller synchronizes using PRSC */
531 }
532
533 static int ohci_hub_control (
534 struct usb_hcd *hcd,
535 u16 typeReq,
536 u16 wValue,
537 u16 wIndex,
538 char *buf,
539 u16 wLength
540 ) {
541 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
542 int ports = hcd_to_bus (hcd)->root_hub->maxchild;
543 u32 temp;
544 int retval = 0;
545
546 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
547 return -ESHUTDOWN;
548
549 switch (typeReq) {
550 case ClearHubFeature:
551 switch (wValue) {
552 case C_HUB_OVER_CURRENT:
553 ohci_writel (ohci, RH_HS_OCIC,
554 &ohci->regs->roothub.status);
555 case C_HUB_LOCAL_POWER:
556 break;
557 default:
558 goto error;
559 }
560 break;
561 case ClearPortFeature:
562 if (!wIndex || wIndex > ports)
563 goto error;
564 wIndex--;
565
566 switch (wValue) {
567 case USB_PORT_FEAT_ENABLE:
568 temp = RH_PS_CCS;
569 break;
570 case USB_PORT_FEAT_C_ENABLE:
571 temp = RH_PS_PESC;
572 break;
573 case USB_PORT_FEAT_SUSPEND:
574 temp = RH_PS_POCI;
575 if ((ohci->hc_control & OHCI_CTRL_HCFS)
576 != OHCI_USB_OPER)
577 usb_hcd_resume_root_hub(hcd);
578 break;
579 case USB_PORT_FEAT_C_SUSPEND:
580 temp = RH_PS_PSSC;
581 break;
582 case USB_PORT_FEAT_POWER:
583 temp = RH_PS_LSDA;
584 break;
585 case USB_PORT_FEAT_C_CONNECTION:
586 temp = RH_PS_CSC;
587 break;
588 case USB_PORT_FEAT_C_OVER_CURRENT:
589 temp = RH_PS_OCIC;
590 break;
591 case USB_PORT_FEAT_C_RESET:
592 temp = RH_PS_PRSC;
593 break;
594 default:
595 goto error;
596 }
597 ohci_writel (ohci, temp,
598 &ohci->regs->roothub.portstatus [wIndex]);
599 // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]);
600 break;
601 case GetHubDescriptor:
602 ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf);
603 break;
604 case GetHubStatus:
605 temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE);
606 put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
607 break;
608 case GetPortStatus:
609 if (!wIndex || wIndex > ports)
610 goto error;
611 wIndex--;
612 temp = roothub_portstatus (ohci, wIndex);
613 put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
614
615 #ifndef OHCI_VERBOSE_DEBUG
616 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
617 #endif
618 dbg_port (ohci, "GetStatus", wIndex, temp);
619 break;
620 case SetHubFeature:
621 switch (wValue) {
622 case C_HUB_OVER_CURRENT:
623 // FIXME: this can be cleared, yes?
624 case C_HUB_LOCAL_POWER:
625 break;
626 default:
627 goto error;
628 }
629 break;
630 case SetPortFeature:
631 if (!wIndex || wIndex > ports)
632 goto error;
633 wIndex--;
634 switch (wValue) {
635 case USB_PORT_FEAT_SUSPEND:
636 #ifdef CONFIG_USB_OTG
637 if (hcd->self.otg_port == (wIndex + 1)
638 && hcd->self.b_hnp_enable)
639 start_hnp(ohci);
640 else
641 #endif
642 ohci_writel (ohci, RH_PS_PSS,
643 &ohci->regs->roothub.portstatus [wIndex]);
644 break;
645 case USB_PORT_FEAT_POWER:
646 ohci_writel (ohci, RH_PS_PPS,
647 &ohci->regs->roothub.portstatus [wIndex]);
648 break;
649 case USB_PORT_FEAT_RESET:
650 root_port_reset (ohci, wIndex);
651 break;
652 default:
653 goto error;
654 }
655 break;
656
657 default:
658 error:
659 /* "protocol stall" on error */
660 retval = -EPIPE;
661 }
662 return retval;
663 }
664
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