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1da177e4 | 1 | /* |
d49d4317 | 2 | * Copyright (C) 2001-2004 by David Brownell |
1da177e4 LT |
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 | #ifdef CONFIG_PM | |
32 | ||
33 | static int ehci_hub_suspend (struct usb_hcd *hcd) | |
34 | { | |
35 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
36 | int port; | |
37 | ||
38 | if (time_before (jiffies, ehci->next_statechange)) | |
39 | msleep(5); | |
40 | ||
41 | port = HCS_N_PORTS (ehci->hcs_params); | |
42 | spin_lock_irq (&ehci->lock); | |
43 | ||
44 | /* stop schedules, clean any completed work */ | |
45 | if (HC_IS_RUNNING(hcd->state)) { | |
46 | ehci_quiesce (ehci); | |
47 | hcd->state = HC_STATE_QUIESCING; | |
48 | } | |
49 | ehci->command = readl (&ehci->regs->command); | |
50 | if (ehci->reclaim) | |
51 | ehci->reclaim_ready = 1; | |
52 | ehci_work(ehci, NULL); | |
53 | ||
54 | /* suspend any active/unsuspended ports, maybe allow wakeup */ | |
55 | while (port--) { | |
56 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
57 | u32 t1 = readl (reg); | |
58 | u32 t2 = t1; | |
59 | ||
60 | if ((t1 & PORT_PE) && !(t1 & PORT_OWNER)) | |
61 | t2 |= PORT_SUSPEND; | |
62 | if (hcd->remote_wakeup) | |
63 | t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E; | |
64 | else | |
65 | t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); | |
66 | ||
67 | if (t1 != t2) { | |
68 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
69 | port + 1, t1, t2); | |
70 | writel (t2, reg); | |
71 | } | |
72 | } | |
73 | ||
74 | /* turn off now-idle HC */ | |
4756ae5b | 75 | del_timer_sync (&ehci->watchdog); |
1da177e4 LT |
76 | ehci_halt (ehci); |
77 | hcd->state = HC_STATE_SUSPENDED; | |
78 | ||
79 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); | |
80 | spin_unlock_irq (&ehci->lock); | |
81 | return 0; | |
82 | } | |
83 | ||
84 | ||
85 | /* caller has locked the root hub, and should reset/reinit on error */ | |
86 | static int ehci_hub_resume (struct usb_hcd *hcd) | |
87 | { | |
88 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
89 | u32 temp; | |
90 | int i; | |
91 | int intr_enable; | |
92 | ||
93 | if (time_before (jiffies, ehci->next_statechange)) | |
94 | msleep(5); | |
95 | spin_lock_irq (&ehci->lock); | |
96 | ||
97 | /* re-init operational registers in case we lost power */ | |
98 | if (readl (&ehci->regs->intr_enable) == 0) { | |
99 | /* at least some APM implementations will try to deliver | |
100 | * IRQs right away, so delay them until we're ready. | |
101 | */ | |
102 | intr_enable = 1; | |
103 | writel (0, &ehci->regs->segment); | |
104 | writel (ehci->periodic_dma, &ehci->regs->frame_list); | |
105 | writel ((u32)ehci->async->qh_dma, &ehci->regs->async_next); | |
106 | } else | |
107 | intr_enable = 0; | |
108 | ehci_dbg(ehci, "resume root hub%s\n", | |
109 | intr_enable ? " after power loss" : ""); | |
110 | ||
111 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
112 | writel (ehci->command, &ehci->regs->command); | |
113 | ||
114 | /* take ports out of suspend */ | |
115 | i = HCS_N_PORTS (ehci->hcs_params); | |
116 | while (i--) { | |
117 | temp = readl (&ehci->regs->port_status [i]); | |
118 | temp &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); | |
119 | if (temp & PORT_SUSPEND) { | |
120 | ehci->reset_done [i] = jiffies + msecs_to_jiffies (20); | |
121 | temp |= PORT_RESUME; | |
122 | } | |
123 | writel (temp, &ehci->regs->port_status [i]); | |
124 | } | |
125 | i = HCS_N_PORTS (ehci->hcs_params); | |
126 | mdelay (20); | |
127 | while (i--) { | |
128 | temp = readl (&ehci->regs->port_status [i]); | |
129 | if ((temp & PORT_SUSPEND) == 0) | |
130 | continue; | |
131 | temp &= ~PORT_RESUME; | |
132 | writel (temp, &ehci->regs->port_status [i]); | |
133 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); | |
134 | } | |
135 | (void) readl (&ehci->regs->command); | |
136 | ||
137 | /* maybe re-activate the schedule(s) */ | |
138 | temp = 0; | |
139 | if (ehci->async->qh_next.qh) | |
140 | temp |= CMD_ASE; | |
141 | if (ehci->periodic_sched) | |
142 | temp |= CMD_PSE; | |
143 | if (temp) { | |
144 | ehci->command |= temp; | |
145 | writel (ehci->command, &ehci->regs->command); | |
146 | } | |
147 | ||
148 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
149 | hcd->state = HC_STATE_RUNNING; | |
150 | ||
151 | /* Now we can safely re-enable irqs */ | |
152 | if (intr_enable) | |
153 | writel (INTR_MASK, &ehci->regs->intr_enable); | |
154 | ||
155 | spin_unlock_irq (&ehci->lock); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | #else | |
160 | ||
161 | #define ehci_hub_suspend NULL | |
162 | #define ehci_hub_resume NULL | |
163 | ||
164 | #endif /* CONFIG_PM */ | |
165 | ||
166 | /*-------------------------------------------------------------------------*/ | |
167 | ||
168 | static int check_reset_complete ( | |
169 | struct ehci_hcd *ehci, | |
170 | int index, | |
171 | int port_status | |
172 | ) { | |
173 | if (!(port_status & PORT_CONNECT)) { | |
174 | ehci->reset_done [index] = 0; | |
175 | return port_status; | |
176 | } | |
177 | ||
178 | /* if reset finished and it's still not enabled -- handoff */ | |
179 | if (!(port_status & PORT_PE)) { | |
180 | ||
181 | /* with integrated TT, there's nobody to hand it to! */ | |
182 | if (ehci_is_TDI(ehci)) { | |
183 | ehci_dbg (ehci, | |
184 | "Failed to enable port %d on root hub TT\n", | |
185 | index+1); | |
186 | return port_status; | |
187 | } | |
188 | ||
189 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
190 | index + 1); | |
191 | ||
192 | // what happens if HCS_N_CC(params) == 0 ? | |
193 | port_status |= PORT_OWNER; | |
194 | writel (port_status, &ehci->regs->port_status [index]); | |
195 | ||
196 | } else | |
197 | ehci_dbg (ehci, "port %d high speed\n", index + 1); | |
198 | ||
199 | return port_status; | |
200 | } | |
201 | ||
202 | /*-------------------------------------------------------------------------*/ | |
203 | ||
204 | ||
205 | /* build "status change" packet (one or two bytes) from HC registers */ | |
206 | ||
207 | static int | |
208 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
209 | { | |
210 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
211 | u32 temp, status = 0; | |
212 | int ports, i, retval = 1; | |
213 | unsigned long flags; | |
214 | ||
215 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
216 | if (!HC_IS_RUNNING(hcd->state)) | |
217 | return 0; | |
218 | ||
219 | /* init status to no-changes */ | |
220 | buf [0] = 0; | |
221 | ports = HCS_N_PORTS (ehci->hcs_params); | |
222 | if (ports > 7) { | |
223 | buf [1] = 0; | |
224 | retval++; | |
225 | } | |
226 | ||
227 | /* no hub change reports (bit 0) for now (power, ...) */ | |
228 | ||
229 | /* port N changes (bit N)? */ | |
230 | spin_lock_irqsave (&ehci->lock, flags); | |
231 | for (i = 0; i < ports; i++) { | |
232 | temp = readl (&ehci->regs->port_status [i]); | |
233 | if (temp & PORT_OWNER) { | |
234 | /* don't report this in GetPortStatus */ | |
235 | if (temp & PORT_CSC) { | |
236 | temp &= ~PORT_CSC; | |
237 | writel (temp, &ehci->regs->port_status [i]); | |
238 | } | |
239 | continue; | |
240 | } | |
241 | if (!(temp & PORT_CONNECT)) | |
242 | ehci->reset_done [i] = 0; | |
243 | if ((temp & (PORT_CSC | PORT_PEC | PORT_OCC)) != 0 | |
244 | // PORT_STAT_C_SUSPEND? | |
245 | || ((temp & PORT_RESUME) != 0 | |
246 | && time_after (jiffies, | |
247 | ehci->reset_done [i]))) { | |
248 | if (i < 7) | |
249 | buf [0] |= 1 << (i + 1); | |
250 | else | |
251 | buf [1] |= 1 << (i - 7); | |
252 | status = STS_PCD; | |
253 | } | |
254 | } | |
255 | /* FIXME autosuspend idle root hubs */ | |
256 | spin_unlock_irqrestore (&ehci->lock, flags); | |
257 | return status ? retval : 0; | |
258 | } | |
259 | ||
260 | /*-------------------------------------------------------------------------*/ | |
261 | ||
262 | static void | |
263 | ehci_hub_descriptor ( | |
264 | struct ehci_hcd *ehci, | |
265 | struct usb_hub_descriptor *desc | |
266 | ) { | |
267 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
268 | u16 temp; | |
269 | ||
270 | desc->bDescriptorType = 0x29; | |
271 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
272 | desc->bHubContrCurrent = 0; | |
273 | ||
274 | desc->bNbrPorts = ports; | |
275 | temp = 1 + (ports / 8); | |
276 | desc->bDescLength = 7 + 2 * temp; | |
277 | ||
278 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
279 | memset (&desc->bitmap [0], 0, temp); | |
280 | memset (&desc->bitmap [temp], 0xff, temp); | |
281 | ||
282 | temp = 0x0008; /* per-port overcurrent reporting */ | |
283 | if (HCS_PPC (ehci->hcs_params)) | |
284 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
285 | else |
286 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
287 | #if 0 |
288 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
289 | if (HCS_INDICATOR (ehci->hcs_params)) | |
290 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
291 | #endif | |
292 | desc->wHubCharacteristics = (__force __u16)cpu_to_le16 (temp); | |
293 | } | |
294 | ||
295 | /*-------------------------------------------------------------------------*/ | |
296 | ||
297 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) | |
298 | ||
299 | static int ehci_hub_control ( | |
300 | struct usb_hcd *hcd, | |
301 | u16 typeReq, | |
302 | u16 wValue, | |
303 | u16 wIndex, | |
304 | char *buf, | |
305 | u16 wLength | |
306 | ) { | |
307 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
308 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
309 | u32 temp, status; | |
310 | unsigned long flags; | |
311 | int retval = 0; | |
312 | ||
313 | /* | |
314 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
315 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
316 | * (track current state ourselves) ... blink for diagnostics, | |
317 | * power, "this is the one", etc. EHCI spec supports this. | |
318 | */ | |
319 | ||
320 | spin_lock_irqsave (&ehci->lock, flags); | |
321 | switch (typeReq) { | |
322 | case ClearHubFeature: | |
323 | switch (wValue) { | |
324 | case C_HUB_LOCAL_POWER: | |
325 | case C_HUB_OVER_CURRENT: | |
326 | /* no hub-wide feature/status flags */ | |
327 | break; | |
328 | default: | |
329 | goto error; | |
330 | } | |
331 | break; | |
332 | case ClearPortFeature: | |
333 | if (!wIndex || wIndex > ports) | |
334 | goto error; | |
335 | wIndex--; | |
336 | temp = readl (&ehci->regs->port_status [wIndex]); | |
337 | if (temp & PORT_OWNER) | |
338 | break; | |
339 | ||
340 | switch (wValue) { | |
341 | case USB_PORT_FEAT_ENABLE: | |
342 | writel (temp & ~PORT_PE, | |
343 | &ehci->regs->port_status [wIndex]); | |
344 | break; | |
345 | case USB_PORT_FEAT_C_ENABLE: | |
346 | writel (temp | PORT_PEC, | |
347 | &ehci->regs->port_status [wIndex]); | |
348 | break; | |
349 | case USB_PORT_FEAT_SUSPEND: | |
350 | if (temp & PORT_RESET) | |
351 | goto error; | |
352 | if (temp & PORT_SUSPEND) { | |
353 | if ((temp & PORT_PE) == 0) | |
354 | goto error; | |
355 | /* resume signaling for 20 msec */ | |
356 | writel ((temp & ~PORT_WAKE_BITS) | PORT_RESUME, | |
357 | &ehci->regs->port_status [wIndex]); | |
358 | ehci->reset_done [wIndex] = jiffies | |
359 | + msecs_to_jiffies (20); | |
360 | } | |
361 | break; | |
362 | case USB_PORT_FEAT_C_SUSPEND: | |
363 | /* we auto-clear this feature */ | |
364 | break; | |
365 | case USB_PORT_FEAT_POWER: | |
366 | if (HCS_PPC (ehci->hcs_params)) | |
367 | writel (temp & ~PORT_POWER, | |
368 | &ehci->regs->port_status [wIndex]); | |
369 | break; | |
370 | case USB_PORT_FEAT_C_CONNECTION: | |
371 | writel (temp | PORT_CSC, | |
372 | &ehci->regs->port_status [wIndex]); | |
373 | break; | |
374 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
375 | writel (temp | PORT_OCC, | |
376 | &ehci->regs->port_status [wIndex]); | |
377 | break; | |
378 | case USB_PORT_FEAT_C_RESET: | |
379 | /* GetPortStatus clears reset */ | |
380 | break; | |
381 | default: | |
382 | goto error; | |
383 | } | |
384 | readl (&ehci->regs->command); /* unblock posted write */ | |
385 | break; | |
386 | case GetHubDescriptor: | |
387 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
388 | buf); | |
389 | break; | |
390 | case GetHubStatus: | |
391 | /* no hub-wide feature/status flags */ | |
392 | memset (buf, 0, 4); | |
393 | //cpu_to_le32s ((u32 *) buf); | |
394 | break; | |
395 | case GetPortStatus: | |
396 | if (!wIndex || wIndex > ports) | |
397 | goto error; | |
398 | wIndex--; | |
399 | status = 0; | |
400 | temp = readl (&ehci->regs->port_status [wIndex]); | |
401 | ||
402 | // wPortChange bits | |
403 | if (temp & PORT_CSC) | |
404 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
405 | if (temp & PORT_PEC) | |
406 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
407 | if (temp & PORT_OCC) | |
408 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; | |
409 | ||
410 | /* whoever resumes must GetPortStatus to complete it!! */ | |
411 | if ((temp & PORT_RESUME) | |
412 | && time_after (jiffies, | |
413 | ehci->reset_done [wIndex])) { | |
414 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
415 | ehci->reset_done [wIndex] = 0; | |
416 | ||
417 | /* stop resume signaling */ | |
418 | temp = readl (&ehci->regs->port_status [wIndex]); | |
419 | writel (temp & ~PORT_RESUME, | |
420 | &ehci->regs->port_status [wIndex]); | |
421 | retval = handshake ( | |
422 | &ehci->regs->port_status [wIndex], | |
423 | PORT_RESUME, 0, 2000 /* 2msec */); | |
424 | if (retval != 0) { | |
425 | ehci_err (ehci, "port %d resume error %d\n", | |
426 | wIndex + 1, retval); | |
427 | goto error; | |
428 | } | |
429 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
430 | } | |
431 | ||
432 | /* whoever resets must GetPortStatus to complete it!! */ | |
433 | if ((temp & PORT_RESET) | |
434 | && time_after (jiffies, | |
435 | ehci->reset_done [wIndex])) { | |
436 | status |= 1 << USB_PORT_FEAT_C_RESET; | |
437 | ehci->reset_done [wIndex] = 0; | |
438 | ||
439 | /* force reset to complete */ | |
440 | writel (temp & ~PORT_RESET, | |
441 | &ehci->regs->port_status [wIndex]); | |
c22fa3ac DB |
442 | /* REVISIT: some hardware needs 550+ usec to clear |
443 | * this bit; seems too long to spin routinely... | |
444 | */ | |
1da177e4 LT |
445 | retval = handshake ( |
446 | &ehci->regs->port_status [wIndex], | |
c22fa3ac | 447 | PORT_RESET, 0, 750); |
1da177e4 LT |
448 | if (retval != 0) { |
449 | ehci_err (ehci, "port %d reset error %d\n", | |
450 | wIndex + 1, retval); | |
451 | goto error; | |
452 | } | |
453 | ||
454 | /* see what we found out */ | |
455 | temp = check_reset_complete (ehci, wIndex, | |
456 | readl (&ehci->regs->port_status [wIndex])); | |
457 | } | |
458 | ||
459 | // don't show wPortStatus if it's owned by a companion hc | |
460 | if (!(temp & PORT_OWNER)) { | |
461 | if (temp & PORT_CONNECT) { | |
462 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
463 | // status may be from integrated TT | |
464 | status |= ehci_port_speed(ehci, temp); | |
465 | } | |
466 | if (temp & PORT_PE) | |
467 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
468 | if (temp & (PORT_SUSPEND|PORT_RESUME)) | |
469 | status |= 1 << USB_PORT_FEAT_SUSPEND; | |
470 | if (temp & PORT_OC) | |
471 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
472 | if (temp & PORT_RESET) | |
473 | status |= 1 << USB_PORT_FEAT_RESET; | |
474 | if (temp & PORT_POWER) | |
475 | status |= 1 << USB_PORT_FEAT_POWER; | |
476 | } | |
477 | ||
478 | #ifndef EHCI_VERBOSE_DEBUG | |
479 | if (status & ~0xffff) /* only if wPortChange is interesting */ | |
480 | #endif | |
481 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
482 | // we "know" this alignment is good, caller used kmalloc()... | |
483 | *((__le32 *) buf) = cpu_to_le32 (status); | |
484 | break; | |
485 | case SetHubFeature: | |
486 | switch (wValue) { | |
487 | case C_HUB_LOCAL_POWER: | |
488 | case C_HUB_OVER_CURRENT: | |
489 | /* no hub-wide feature/status flags */ | |
490 | break; | |
491 | default: | |
492 | goto error; | |
493 | } | |
494 | break; | |
495 | case SetPortFeature: | |
496 | if (!wIndex || wIndex > ports) | |
497 | goto error; | |
498 | wIndex--; | |
499 | temp = readl (&ehci->regs->port_status [wIndex]); | |
500 | if (temp & PORT_OWNER) | |
501 | break; | |
502 | ||
503 | switch (wValue) { | |
504 | case USB_PORT_FEAT_SUSPEND: | |
505 | if ((temp & PORT_PE) == 0 | |
506 | || (temp & PORT_RESET) != 0) | |
507 | goto error; | |
508 | if (hcd->remote_wakeup) | |
509 | temp |= PORT_WAKE_BITS; | |
510 | writel (temp | PORT_SUSPEND, | |
511 | &ehci->regs->port_status [wIndex]); | |
512 | break; | |
513 | case USB_PORT_FEAT_POWER: | |
514 | if (HCS_PPC (ehci->hcs_params)) | |
515 | writel (temp | PORT_POWER, | |
516 | &ehci->regs->port_status [wIndex]); | |
517 | break; | |
518 | case USB_PORT_FEAT_RESET: | |
519 | if (temp & PORT_RESUME) | |
520 | goto error; | |
521 | /* line status bits may report this as low speed, | |
522 | * which can be fine if this root hub has a | |
523 | * transaction translator built in. | |
524 | */ | |
525 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
526 | && !ehci_is_TDI(ehci) | |
527 | && PORT_USB11 (temp)) { | |
528 | ehci_dbg (ehci, | |
529 | "port %d low speed --> companion\n", | |
530 | wIndex + 1); | |
531 | temp |= PORT_OWNER; | |
532 | } else { | |
533 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
534 | temp |= PORT_RESET; | |
535 | temp &= ~PORT_PE; | |
536 | ||
537 | /* | |
538 | * caller must wait, then call GetPortStatus | |
539 | * usb 2.0 spec says 50 ms resets on root | |
540 | */ | |
541 | ehci->reset_done [wIndex] = jiffies | |
542 | + msecs_to_jiffies (50); | |
543 | } | |
544 | writel (temp, &ehci->regs->port_status [wIndex]); | |
545 | break; | |
546 | default: | |
547 | goto error; | |
548 | } | |
549 | readl (&ehci->regs->command); /* unblock posted writes */ | |
550 | break; | |
551 | ||
552 | default: | |
553 | error: | |
554 | /* "stall" on error */ | |
555 | retval = -EPIPE; | |
556 | } | |
557 | spin_unlock_irqrestore (&ehci->lock, flags); | |
558 | return retval; | |
559 | } |