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USB: ohci whitespace/comment fixups
[linux-2.6.22.y-op.git] / drivers / usb / host / ohci-hub.c
blobf9748b67e5e713010d1c6ba820b469c8e0470558
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_restart(struct ohci_hcd *ohci);
59
60 static int ohci_rh_suspend (struct ohci_hcd *ohci, int autostop)
61 __releases(ohci->lock)
62 __acquires(ohci->lock)
63 {
64 int status = 0;
65
66 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
67 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
68 case OHCI_USB_RESUME:
69 ohci_dbg (ohci, "resume/suspend?\n");
70 ohci->hc_control &= ~OHCI_CTRL_HCFS;
71 ohci->hc_control |= OHCI_USB_RESET;
72 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
73 (void) ohci_readl (ohci, &ohci->regs->control);
74 /* FALL THROUGH */
75 case OHCI_USB_RESET:
76 status = -EBUSY;
77 ohci_dbg (ohci, "needs reinit!\n");
78 goto done;
79 case OHCI_USB_SUSPEND:
80 if (!ohci->autostop) {
81 ohci_dbg (ohci, "already suspended\n");
82 goto done;
83 }
84 }
85 ohci_dbg (ohci, "%s root hub\n",
86 autostop ? "auto-stop" : "suspend");
87
88 /* First stop any processing */
89 if (!autostop && (ohci->hc_control & OHCI_SCHED_ENABLES)) {
90 ohci->hc_control &= ~OHCI_SCHED_ENABLES;
91 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
92 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
93 ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus);
94
95 /* sched disables take effect on the next frame,
96 * then the last WDH could take 6+ msec
97 */
98 ohci_dbg (ohci, "stopping schedules ...\n");
99 ohci->autostop = 0;
100 spin_unlock_irq (&ohci->lock);
101 msleep (8);
102 spin_lock_irq (&ohci->lock);
103 }
104 dl_done_list (ohci);
105 finish_unlinks (ohci, ohci_frame_no(ohci));
106
107 /* maybe resume can wake root hub */
108 if (device_may_wakeup(&ohci_to_hcd(ohci)->self.root_hub->dev) ||
109 autostop)
110 ohci->hc_control |= OHCI_CTRL_RWE;
111 else {
112 ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrdisable);
113 ohci->hc_control &= ~OHCI_CTRL_RWE;
114 }
115
116 /* Suspend hub ... this is the "global (to this bus) suspend" mode,
117 * which doesn't imply ports will first be individually suspended.
118 */
119 ohci->hc_control &= ~OHCI_CTRL_HCFS;
120 ohci->hc_control |= OHCI_USB_SUSPEND;
121 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
122 (void) ohci_readl (ohci, &ohci->regs->control);
123
124 /* no resumes until devices finish suspending */
125 if (!autostop) {
126 ohci->next_statechange = jiffies + msecs_to_jiffies (5);
127 ohci->autostop = 0;
128 }
129
130 done:
131 return status;
132 }
133
134 static inline struct ed *find_head (struct ed *ed)
135 {
136 /* for bulk and control lists */
137 while (ed->ed_prev)
138 ed = ed->ed_prev;
139 return ed;
140 }
141
142 /* caller has locked the root hub */
143 static int ohci_rh_resume (struct ohci_hcd *ohci)
144 __releases(ohci->lock)
145 __acquires(ohci->lock)
146 {
147 struct usb_hcd *hcd = ohci_to_hcd (ohci);
148 u32 temp, enables;
149 int status = -EINPROGRESS;
150 int autostopped = ohci->autostop;
151
152 ohci->autostop = 0;
153 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
154
155 if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
156 /* this can happen after resuming a swsusp snapshot */
157 if (hcd->state == HC_STATE_RESUMING) {
158 ohci_dbg (ohci, "BIOS/SMM active, control %03x\n",
159 ohci->hc_control);
160 status = -EBUSY;
161 /* this happens when pmcore resumes HC then root */
162 } else {
163 ohci_dbg (ohci, "duplicate resume\n");
164 status = 0;
165 }
166 } else switch (ohci->hc_control & OHCI_CTRL_HCFS) {
167 case OHCI_USB_SUSPEND:
168 ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
169 ohci->hc_control |= OHCI_USB_RESUME;
170 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
171 (void) ohci_readl (ohci, &ohci->regs->control);
172 ohci_dbg (ohci, "%s root hub\n",
173 autostopped ? "auto-start" : "resume");
174 break;
175 case OHCI_USB_RESUME:
176 /* HCFS changes sometime after INTR_RD */
177 ohci_dbg(ohci, "%swakeup root hub\n",
178 autostopped ? "auto-" : "");
179 break;
180 case OHCI_USB_OPER:
181 /* this can happen after resuming a swsusp snapshot */
182 ohci_dbg (ohci, "snapshot resume? reinit\n");
183 status = -EBUSY;
184 break;
185 default: /* RESET, we lost power */
186 ohci_dbg (ohci, "lost power\n");
187 status = -EBUSY;
188 }
189 if (status == -EBUSY) {
190 if (!autostopped) {
191 spin_unlock_irq (&ohci->lock);
192 (void) ohci_init (ohci);
193 status = ohci_restart (ohci);
194 spin_lock_irq (&ohci->lock);
195 }
196 return status;
197 }
198 if (status != -EINPROGRESS)
199 return status;
200 if (autostopped)
201 goto skip_resume;
202 spin_unlock_irq (&ohci->lock);
203
204 /* Some controllers (lucent erratum) need extra-long delays */
205 msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
206
207 temp = ohci_readl (ohci, &ohci->regs->control);
208 temp &= OHCI_CTRL_HCFS;
209 if (temp != OHCI_USB_RESUME) {
210 ohci_err (ohci, "controller won't resume\n");
211 spin_lock_irq(&ohci->lock);
212 return -EBUSY;
213 }
214
215 /* disable old schedule state, reinit from scratch */
216 ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
217 ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent);
218 ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
219 ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent);
220 ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent);
221 ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
222
223 /* Sometimes PCI D3 suspend trashes frame timings ... */
224 periodic_reinit (ohci);
225
226 /* the following code is executed with ohci->lock held and
227 * irqs disabled if and only if autostopped is true
228 */
229
230 skip_resume:
231 /* interrupts might have been disabled */
232 ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable);
233 if (ohci->ed_rm_list)
234 ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable);
235
236 /* Then re-enable operations */
237 ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control);
238 (void) ohci_readl (ohci, &ohci->regs->control);
239 if (!autostopped)
240 msleep (3);
241
242 temp = ohci->hc_control;
243 temp &= OHCI_CTRL_RWC;
244 temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
245 ohci->hc_control = temp;
246 ohci_writel (ohci, temp, &ohci->regs->control);
247 (void) ohci_readl (ohci, &ohci->regs->control);
248
249 /* TRSMRCY */
250 if (!autostopped) {
251 msleep (10);
252 spin_lock_irq (&ohci->lock);
253 }
254 /* now ohci->lock is always held and irqs are always disabled */
255
256 /* keep it alive for more than ~5x suspend + resume costs */
257 ohci->next_statechange = jiffies + STATECHANGE_DELAY;
258
259 /* maybe turn schedules back on */
260 enables = 0;
261 temp = 0;
262 if (!ohci->ed_rm_list) {
263 if (ohci->ed_controltail) {
264 ohci_writel (ohci,
265 find_head (ohci->ed_controltail)->dma,
266 &ohci->regs->ed_controlhead);
267 enables |= OHCI_CTRL_CLE;
268 temp |= OHCI_CLF;
269 }
270 if (ohci->ed_bulktail) {
271 ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma,
272 &ohci->regs->ed_bulkhead);
273 enables |= OHCI_CTRL_BLE;
274 temp |= OHCI_BLF;
275 }
276 }
277 if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
278 enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
279 if (enables) {
280 ohci_dbg (ohci, "restarting schedules ... %08x\n", enables);
281 ohci->hc_control |= enables;
282 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
283 if (temp)
284 ohci_writel (ohci, temp, &ohci->regs->cmdstatus);
285 (void) ohci_readl (ohci, &ohci->regs->control);
286 }
287
288 return 0;
289 }
290
291 static int ohci_bus_suspend (struct usb_hcd *hcd)
292 {
293 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
294 int rc;
295
296 spin_lock_irq (&ohci->lock);
297
298 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
299 rc = -ESHUTDOWN;
300 else
301 rc = ohci_rh_suspend (ohci, 0);
302 spin_unlock_irq (&ohci->lock);
303 return rc;
304 }
305
306 static int ohci_bus_resume (struct usb_hcd *hcd)
307 {
308 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
309 int rc;
310
311 if (time_before (jiffies, ohci->next_statechange))
312 msleep(5);
313
314 spin_lock_irq (&ohci->lock);
315
316 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
317 rc = -ESHUTDOWN;
318 else
319 rc = ohci_rh_resume (ohci);
320 spin_unlock_irq (&ohci->lock);
321
322 /* poll until we know a device is connected or we autostop */
323 if (rc == 0)
324 usb_hcd_poll_rh_status(hcd);
325 return rc;
326 }
327
328 /* Carry out polling-, autostop-, and autoresume-related state changes */
329 static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
330 int any_connected)
331 {
332 int poll_rh = 1;
333
334 switch (ohci->hc_control & OHCI_CTRL_HCFS) {
335
336 case OHCI_USB_OPER:
337 /* keep on polling until we know a device is connected
338 * and RHSC is enabled */
339 if (!ohci->autostop) {
340 if (any_connected ||
341 !device_may_wakeup(&ohci_to_hcd(ohci)
342 ->self.root_hub->dev)) {
343 if (ohci_readl(ohci, &ohci->regs->intrenable) &
344 OHCI_INTR_RHSC)
345 poll_rh = 0;
346 } else {
347 ohci->autostop = 1;
348 ohci->next_statechange = jiffies + HZ;
349 }
350
351 /* if no devices have been attached for one second, autostop */
352 } else {
353 if (changed || any_connected) {
354 ohci->autostop = 0;
355 ohci->next_statechange = jiffies +
356 STATECHANGE_DELAY;
357 } else if (time_after_eq(jiffies,
358 ohci->next_statechange)
359 && !ohci->ed_rm_list
360 && !(ohci->hc_control &
361 OHCI_SCHED_ENABLES)) {
362 ohci_rh_suspend(ohci, 1);
363 }
364 }
365 break;
366
367 /* if there is a port change, autostart or ask to be resumed */
368 case OHCI_USB_SUSPEND:
369 case OHCI_USB_RESUME:
370 if (changed) {
371 if (ohci->autostop)
372 ohci_rh_resume(ohci);
373 else
374 usb_hcd_resume_root_hub(ohci_to_hcd(ohci));
375 } else {
376 /* everything is idle, no need for polling */
377 poll_rh = 0;
378 }
379 break;
380 }
381 return poll_rh;
382 }
383
384 #else /* CONFIG_PM */
385
386 static inline int ohci_rh_resume(struct ohci_hcd *ohci)
387 {
388 return 0;
389 }
390
391 /* Carry out polling-related state changes.
392 * autostop isn't used when CONFIG_PM is turned off.
393 */
394 static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
395 int any_connected)
396 {
397 int poll_rh = 1;
398
399 /* keep on polling until RHSC is enabled */
400 if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC)
401 poll_rh = 0;
402 return poll_rh;
403 }
404
405 #endif /* CONFIG_PM */
406
407 /*-------------------------------------------------------------------------*/
408
409 /* build "status change" packet (one or two bytes) from HC registers */
410
411 static int
412 ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
413 {
414 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
415 int i, changed = 0, length = 1;
416 int any_connected = 0;
417 unsigned long flags;
418
419 spin_lock_irqsave (&ohci->lock, flags);
420
421 /* undocumented erratum seen on at least rev D */
422 if ((ohci->flags & OHCI_QUIRK_AMD756)
423 && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) {
424 ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n",
425 ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP);
426 /* retry later; "should not happen" */
427 goto done;
428 }
429
430 /* init status */
431 if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
432 buf [0] = changed = 1;
433 else
434 buf [0] = 0;
435 if (ohci->num_ports > 7) {
436 buf [1] = 0;
437 length++;
438 }
439
440 /* look at each port */
441 for (i = 0; i < ohci->num_ports; i++) {
442 u32 status = roothub_portstatus (ohci, i);
443
444 /* can't autostop if ports are connected */
445 any_connected |= (status & RH_PS_CCS);
446
447 if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
448 | RH_PS_OCIC | RH_PS_PRSC)) {
449 changed = 1;
450 if (i < 7)
451 buf [0] |= 1 << (i + 1);
452 else
453 buf [1] |= 1 << (i - 7);
454 }
455 }
456
457 hcd->poll_rh = ohci_root_hub_state_changes(ohci, changed,
458 any_connected);
459
460 done:
461 spin_unlock_irqrestore (&ohci->lock, flags);
462
463 return changed ? length : 0;
464 }
465
466 /*-------------------------------------------------------------------------*/
467
468 static void
469 ohci_hub_descriptor (
470 struct ohci_hcd *ohci,
471 struct usb_hub_descriptor *desc
472 ) {
473 u32 rh = roothub_a (ohci);
474 u16 temp;
475
476 desc->bDescriptorType = 0x29;
477 desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24;
478 desc->bHubContrCurrent = 0;
479
480 desc->bNbrPorts = ohci->num_ports;
481 temp = 1 + (ohci->num_ports / 8);
482 desc->bDescLength = 7 + 2 * temp;
483
484 temp = 0;
485 if (rh & RH_A_NPS) /* no power switching? */
486 temp |= 0x0002;
487 if (rh & RH_A_PSM) /* per-port power switching? */
488 temp |= 0x0001;
489 if (rh & RH_A_NOCP) /* no overcurrent reporting? */
490 temp |= 0x0010;
491 else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */
492 temp |= 0x0008;
493 desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp);
494
495 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
496 rh = roothub_b (ohci);
497 memset(desc->bitmap, 0xff, sizeof(desc->bitmap));
498 desc->bitmap [0] = rh & RH_B_DR;
499 if (ohci->num_ports > 7) {
500 desc->bitmap [1] = (rh & RH_B_DR) >> 8;
501 desc->bitmap [2] = 0xff;
502 } else
503 desc->bitmap [1] = 0xff;
504 }
505
506 /*-------------------------------------------------------------------------*/
507
508 #ifdef CONFIG_USB_OTG
509
510 static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port)
511 {
512 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
513 u32 status;
514
515 if (!port)
516 return -EINVAL;
517 port--;
518
519 /* start port reset before HNP protocol times out */
520 status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]);
521 if (!(status & RH_PS_CCS))
522 return -ENODEV;
523
524 /* khubd will finish the reset later */
525 ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]);
526 return 0;
527 }
528
529 static void start_hnp(struct ohci_hcd *ohci);
530
531 #else
532
533 #define ohci_start_port_reset NULL
534
535 #endif
536
537 /*-------------------------------------------------------------------------*/
538
539
540 /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
541 * not necessarily continuous ... to guard against resume signaling.
542 * The short timeout is safe for non-root hubs, and is backward-compatible
543 * with earlier Linux hosts.
544 */
545 #ifdef CONFIG_USB_SUSPEND
546 #define PORT_RESET_MSEC 50
547 #else
548 #define PORT_RESET_MSEC 10
549 #endif
550
551 /* this timer value might be vendor-specific ... */
552 #define PORT_RESET_HW_MSEC 10
553
554 /* wrap-aware logic morphed from <linux/jiffies.h> */
555 #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
556
557 /* called from some task, normally khubd */
558 static inline void root_port_reset (struct ohci_hcd *ohci, unsigned port)
559 {
560 __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port];
561 u32 temp;
562 u16 now = ohci_readl(ohci, &ohci->regs->fmnumber);
563 u16 reset_done = now + PORT_RESET_MSEC;
564
565 /* build a "continuous enough" reset signal, with up to
566 * 3msec gap between pulses. scheduler HZ==100 must work;
567 * this might need to be deadline-scheduled.
568 */
569 do {
570 /* spin until any current reset finishes */
571 for (;;) {
572 temp = ohci_readl (ohci, portstat);
573 if (!(temp & RH_PS_PRS))
574 break;
575 udelay (500);
576 }
577
578 if (!(temp & RH_PS_CCS))
579 break;
580 if (temp & RH_PS_PRSC)
581 ohci_writel (ohci, RH_PS_PRSC, portstat);
582
583 /* start the next reset, sleep till it's probably done */
584 ohci_writel (ohci, RH_PS_PRS, portstat);
585 msleep(PORT_RESET_HW_MSEC);
586 now = ohci_readl(ohci, &ohci->regs->fmnumber);
587 } while (tick_before(now, reset_done));
588 /* caller synchronizes using PRSC */
589 }
590
591 static int ohci_hub_control (
592 struct usb_hcd *hcd,
593 u16 typeReq,
594 u16 wValue,
595 u16 wIndex,
596 char *buf,
597 u16 wLength
598 ) {
599 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
600 int ports = hcd_to_bus (hcd)->root_hub->maxchild;
601 u32 temp;
602 int retval = 0;
603
604 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
605 return -ESHUTDOWN;
606
607 switch (typeReq) {
608 case ClearHubFeature:
609 switch (wValue) {
610 case C_HUB_OVER_CURRENT:
611 ohci_writel (ohci, RH_HS_OCIC,
612 &ohci->regs->roothub.status);
613 case C_HUB_LOCAL_POWER:
614 break;
615 default:
616 goto error;
617 }
618 break;
619 case ClearPortFeature:
620 if (!wIndex || wIndex > ports)
621 goto error;
622 wIndex--;
623
624 switch (wValue) {
625 case USB_PORT_FEAT_ENABLE:
626 temp = RH_PS_CCS;
627 break;
628 case USB_PORT_FEAT_C_ENABLE:
629 temp = RH_PS_PESC;
630 break;
631 case USB_PORT_FEAT_SUSPEND:
632 temp = RH_PS_POCI;
633 break;
634 case USB_PORT_FEAT_C_SUSPEND:
635 temp = RH_PS_PSSC;
636 break;
637 case USB_PORT_FEAT_POWER:
638 temp = RH_PS_LSDA;
639 break;
640 case USB_PORT_FEAT_C_CONNECTION:
641 temp = RH_PS_CSC;
642 break;
643 case USB_PORT_FEAT_C_OVER_CURRENT:
644 temp = RH_PS_OCIC;
645 break;
646 case USB_PORT_FEAT_C_RESET:
647 temp = RH_PS_PRSC;
648 break;
649 default:
650 goto error;
651 }
652 ohci_writel (ohci, temp,
653 &ohci->regs->roothub.portstatus [wIndex]);
654 // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]);
655 break;
656 case GetHubDescriptor:
657 ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf);
658 break;
659 case GetHubStatus:
660 temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE);
661 put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
662 break;
663 case GetPortStatus:
664 if (!wIndex || wIndex > ports)
665 goto error;
666 wIndex--;
667 temp = roothub_portstatus (ohci, wIndex);
668 put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
669
670 #ifndef OHCI_VERBOSE_DEBUG
671 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
672 #endif
673 dbg_port (ohci, "GetStatus", wIndex, temp);
674 break;
675 case SetHubFeature:
676 switch (wValue) {
677 case C_HUB_OVER_CURRENT:
678 // FIXME: this can be cleared, yes?
679 case C_HUB_LOCAL_POWER:
680 break;
681 default:
682 goto error;
683 }
684 break;
685 case SetPortFeature:
686 if (!wIndex || wIndex > ports)
687 goto error;
688 wIndex--;
689 switch (wValue) {
690 case USB_PORT_FEAT_SUSPEND:
691 #ifdef CONFIG_USB_OTG
692 if (hcd->self.otg_port == (wIndex + 1)
693 && hcd->self.b_hnp_enable)
694 start_hnp(ohci);
695 else
696 #endif
697 ohci_writel (ohci, RH_PS_PSS,
698 &ohci->regs->roothub.portstatus [wIndex]);
699 break;
700 case USB_PORT_FEAT_POWER:
701 ohci_writel (ohci, RH_PS_PPS,
702 &ohci->regs->roothub.portstatus [wIndex]);
703 break;
704 case USB_PORT_FEAT_RESET:
705 root_port_reset (ohci, wIndex);
706 break;
707 default:
708 goto error;
709 }
710 break;
711
712 default:
713 error:
714 /* "protocol stall" on error */
715 retval = -EPIPE;
716 }
717 return retval;
718 }
719
linux v2.6.22.y-op