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Commit | Line | Data |
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1da177e4 | 1 | /* |
d49d4317 | 2 | * Copyright (C) 2001-2004 by David Brownell |
53bd6a60 | 3 | * |
1da177e4 LT |
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 | ||
0c0382e3 | 33 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
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) | |
7d12e780 DH |
51 | end_unlink_async (ehci); |
52 | ehci_work(ehci); | |
1da177e4 LT |
53 | |
54 | /* suspend any active/unsuspended ports, maybe allow wakeup */ | |
55 | while (port--) { | |
56 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
10f6524a | 57 | u32 t1 = readl (reg) & ~PORT_RWC_BITS; |
1da177e4 LT |
58 | u32 t2 = t1; |
59 | ||
60 | if ((t1 & PORT_PE) && !(t1 & PORT_OWNER)) | |
61 | t2 |= PORT_SUSPEND; | |
2c1c3c4c | 62 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
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 */ | |
0c0382e3 | 86 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
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 | ||
f03c17fc DB |
97 | /* Ideally and we've got a real resume here, and no port's power |
98 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
99 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
100 | * the last user of the controller, not reset/pm hardware keeping | |
101 | * state we gave to it. | |
102 | */ | |
103 | ||
1da177e4 LT |
104 | /* re-init operational registers in case we lost power */ |
105 | if (readl (&ehci->regs->intr_enable) == 0) { | |
53bd6a60 | 106 | /* at least some APM implementations will try to deliver |
1da177e4 | 107 | * IRQs right away, so delay them until we're ready. |
53bd6a60 DB |
108 | */ |
109 | intr_enable = 1; | |
1da177e4 LT |
110 | writel (0, &ehci->regs->segment); |
111 | writel (ehci->periodic_dma, &ehci->regs->frame_list); | |
112 | writel ((u32)ehci->async->qh_dma, &ehci->regs->async_next); | |
113 | } else | |
114 | intr_enable = 0; | |
115 | ehci_dbg(ehci, "resume root hub%s\n", | |
116 | intr_enable ? " after power loss" : ""); | |
117 | ||
118 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
119 | writel (ehci->command, &ehci->regs->command); | |
120 | ||
121 | /* take ports out of suspend */ | |
122 | i = HCS_N_PORTS (ehci->hcs_params); | |
123 | while (i--) { | |
124 | temp = readl (&ehci->regs->port_status [i]); | |
10f6524a DB |
125 | temp &= ~(PORT_RWC_BITS |
126 | | PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E); | |
1da177e4 LT |
127 | if (temp & PORT_SUSPEND) { |
128 | ehci->reset_done [i] = jiffies + msecs_to_jiffies (20); | |
129 | temp |= PORT_RESUME; | |
130 | } | |
131 | writel (temp, &ehci->regs->port_status [i]); | |
132 | } | |
133 | i = HCS_N_PORTS (ehci->hcs_params); | |
134 | mdelay (20); | |
135 | while (i--) { | |
136 | temp = readl (&ehci->regs->port_status [i]); | |
137 | if ((temp & PORT_SUSPEND) == 0) | |
138 | continue; | |
10f6524a | 139 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); |
1da177e4 LT |
140 | writel (temp, &ehci->regs->port_status [i]); |
141 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); | |
142 | } | |
143 | (void) readl (&ehci->regs->command); | |
144 | ||
145 | /* maybe re-activate the schedule(s) */ | |
146 | temp = 0; | |
147 | if (ehci->async->qh_next.qh) | |
148 | temp |= CMD_ASE; | |
149 | if (ehci->periodic_sched) | |
150 | temp |= CMD_PSE; | |
151 | if (temp) { | |
152 | ehci->command |= temp; | |
153 | writel (ehci->command, &ehci->regs->command); | |
154 | } | |
155 | ||
156 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
157 | hcd->state = HC_STATE_RUNNING; | |
158 | ||
159 | /* Now we can safely re-enable irqs */ | |
160 | if (intr_enable) | |
161 | writel (INTR_MASK, &ehci->regs->intr_enable); | |
162 | ||
163 | spin_unlock_irq (&ehci->lock); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | #else | |
168 | ||
0c0382e3 AS |
169 | #define ehci_bus_suspend NULL |
170 | #define ehci_bus_resume NULL | |
1da177e4 LT |
171 | |
172 | #endif /* CONFIG_PM */ | |
173 | ||
174 | /*-------------------------------------------------------------------------*/ | |
175 | ||
176 | static int check_reset_complete ( | |
177 | struct ehci_hcd *ehci, | |
178 | int index, | |
179 | int port_status | |
180 | ) { | |
181 | if (!(port_status & PORT_CONNECT)) { | |
182 | ehci->reset_done [index] = 0; | |
183 | return port_status; | |
184 | } | |
185 | ||
186 | /* if reset finished and it's still not enabled -- handoff */ | |
187 | if (!(port_status & PORT_PE)) { | |
188 | ||
189 | /* with integrated TT, there's nobody to hand it to! */ | |
190 | if (ehci_is_TDI(ehci)) { | |
191 | ehci_dbg (ehci, | |
192 | "Failed to enable port %d on root hub TT\n", | |
193 | index+1); | |
194 | return port_status; | |
195 | } | |
196 | ||
197 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
198 | index + 1); | |
199 | ||
200 | // what happens if HCS_N_CC(params) == 0 ? | |
201 | port_status |= PORT_OWNER; | |
10f6524a | 202 | port_status &= ~PORT_RWC_BITS; |
1da177e4 LT |
203 | writel (port_status, &ehci->regs->port_status [index]); |
204 | ||
205 | } else | |
206 | ehci_dbg (ehci, "port %d high speed\n", index + 1); | |
207 | ||
208 | return port_status; | |
209 | } | |
210 | ||
211 | /*-------------------------------------------------------------------------*/ | |
212 | ||
213 | ||
214 | /* build "status change" packet (one or two bytes) from HC registers */ | |
215 | ||
216 | static int | |
217 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
218 | { | |
219 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
220 | u32 temp, status = 0; | |
221 | int ports, i, retval = 1; | |
222 | unsigned long flags; | |
223 | ||
224 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
225 | if (!HC_IS_RUNNING(hcd->state)) | |
226 | return 0; | |
227 | ||
228 | /* init status to no-changes */ | |
229 | buf [0] = 0; | |
230 | ports = HCS_N_PORTS (ehci->hcs_params); | |
231 | if (ports > 7) { | |
232 | buf [1] = 0; | |
233 | retval++; | |
234 | } | |
53bd6a60 | 235 | |
1da177e4 LT |
236 | /* no hub change reports (bit 0) for now (power, ...) */ |
237 | ||
238 | /* port N changes (bit N)? */ | |
239 | spin_lock_irqsave (&ehci->lock, flags); | |
240 | for (i = 0; i < ports; i++) { | |
241 | temp = readl (&ehci->regs->port_status [i]); | |
242 | if (temp & PORT_OWNER) { | |
243 | /* don't report this in GetPortStatus */ | |
244 | if (temp & PORT_CSC) { | |
10f6524a DB |
245 | temp &= ~PORT_RWC_BITS; |
246 | temp |= PORT_CSC; | |
1da177e4 LT |
247 | writel (temp, &ehci->regs->port_status [i]); |
248 | } | |
249 | continue; | |
250 | } | |
251 | if (!(temp & PORT_CONNECT)) | |
252 | ehci->reset_done [i] = 0; | |
253 | if ((temp & (PORT_CSC | PORT_PEC | PORT_OCC)) != 0 | |
254 | // PORT_STAT_C_SUSPEND? | |
255 | || ((temp & PORT_RESUME) != 0 | |
256 | && time_after (jiffies, | |
257 | ehci->reset_done [i]))) { | |
258 | if (i < 7) | |
259 | buf [0] |= 1 << (i + 1); | |
260 | else | |
261 | buf [1] |= 1 << (i - 7); | |
262 | status = STS_PCD; | |
263 | } | |
264 | } | |
265 | /* FIXME autosuspend idle root hubs */ | |
266 | spin_unlock_irqrestore (&ehci->lock, flags); | |
267 | return status ? retval : 0; | |
268 | } | |
269 | ||
270 | /*-------------------------------------------------------------------------*/ | |
271 | ||
272 | static void | |
273 | ehci_hub_descriptor ( | |
274 | struct ehci_hcd *ehci, | |
275 | struct usb_hub_descriptor *desc | |
276 | ) { | |
277 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
278 | u16 temp; | |
279 | ||
280 | desc->bDescriptorType = 0x29; | |
281 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
282 | desc->bHubContrCurrent = 0; | |
283 | ||
284 | desc->bNbrPorts = ports; | |
285 | temp = 1 + (ports / 8); | |
286 | desc->bDescLength = 7 + 2 * temp; | |
287 | ||
288 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
289 | memset (&desc->bitmap [0], 0, temp); | |
290 | memset (&desc->bitmap [temp], 0xff, temp); | |
291 | ||
292 | temp = 0x0008; /* per-port overcurrent reporting */ | |
293 | if (HCS_PPC (ehci->hcs_params)) | |
294 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
295 | else |
296 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
297 | #if 0 |
298 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
299 | if (HCS_INDICATOR (ehci->hcs_params)) | |
300 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
301 | #endif | |
302 | desc->wHubCharacteristics = (__force __u16)cpu_to_le16 (temp); | |
303 | } | |
304 | ||
305 | /*-------------------------------------------------------------------------*/ | |
306 | ||
53bd6a60 | 307 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
1da177e4 LT |
308 | |
309 | static int ehci_hub_control ( | |
310 | struct usb_hcd *hcd, | |
311 | u16 typeReq, | |
312 | u16 wValue, | |
313 | u16 wIndex, | |
314 | char *buf, | |
315 | u16 wLength | |
316 | ) { | |
317 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
318 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
319 | u32 temp, status; | |
320 | unsigned long flags; | |
321 | int retval = 0; | |
322 | ||
323 | /* | |
324 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
325 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
326 | * (track current state ourselves) ... blink for diagnostics, | |
327 | * power, "this is the one", etc. EHCI spec supports this. | |
328 | */ | |
329 | ||
330 | spin_lock_irqsave (&ehci->lock, flags); | |
331 | switch (typeReq) { | |
332 | case ClearHubFeature: | |
333 | switch (wValue) { | |
334 | case C_HUB_LOCAL_POWER: | |
335 | case C_HUB_OVER_CURRENT: | |
336 | /* no hub-wide feature/status flags */ | |
337 | break; | |
338 | default: | |
339 | goto error; | |
340 | } | |
341 | break; | |
342 | case ClearPortFeature: | |
343 | if (!wIndex || wIndex > ports) | |
344 | goto error; | |
345 | wIndex--; | |
346 | temp = readl (&ehci->regs->port_status [wIndex]); | |
347 | if (temp & PORT_OWNER) | |
348 | break; | |
349 | ||
350 | switch (wValue) { | |
351 | case USB_PORT_FEAT_ENABLE: | |
352 | writel (temp & ~PORT_PE, | |
353 | &ehci->regs->port_status [wIndex]); | |
354 | break; | |
355 | case USB_PORT_FEAT_C_ENABLE: | |
10f6524a | 356 | writel((temp & ~PORT_RWC_BITS) | PORT_PEC, |
1da177e4 LT |
357 | &ehci->regs->port_status [wIndex]); |
358 | break; | |
359 | case USB_PORT_FEAT_SUSPEND: | |
360 | if (temp & PORT_RESET) | |
361 | goto error; | |
f8aeb3bb DB |
362 | if (ehci->no_selective_suspend) |
363 | break; | |
1da177e4 LT |
364 | if (temp & PORT_SUSPEND) { |
365 | if ((temp & PORT_PE) == 0) | |
366 | goto error; | |
367 | /* resume signaling for 20 msec */ | |
10f6524a DB |
368 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
369 | writel (temp | PORT_RESUME, | |
1da177e4 LT |
370 | &ehci->regs->port_status [wIndex]); |
371 | ehci->reset_done [wIndex] = jiffies | |
372 | + msecs_to_jiffies (20); | |
373 | } | |
374 | break; | |
375 | case USB_PORT_FEAT_C_SUSPEND: | |
376 | /* we auto-clear this feature */ | |
377 | break; | |
378 | case USB_PORT_FEAT_POWER: | |
379 | if (HCS_PPC (ehci->hcs_params)) | |
10f6524a | 380 | writel (temp & ~(PORT_RWC_BITS | PORT_POWER), |
1da177e4 LT |
381 | &ehci->regs->port_status [wIndex]); |
382 | break; | |
383 | case USB_PORT_FEAT_C_CONNECTION: | |
10f6524a | 384 | writel((temp & ~PORT_RWC_BITS) | PORT_CSC, |
1da177e4 LT |
385 | &ehci->regs->port_status [wIndex]); |
386 | break; | |
387 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
10f6524a | 388 | writel((temp & ~PORT_RWC_BITS) | PORT_OCC, |
1da177e4 LT |
389 | &ehci->regs->port_status [wIndex]); |
390 | break; | |
391 | case USB_PORT_FEAT_C_RESET: | |
392 | /* GetPortStatus clears reset */ | |
393 | break; | |
394 | default: | |
395 | goto error; | |
396 | } | |
397 | readl (&ehci->regs->command); /* unblock posted write */ | |
398 | break; | |
399 | case GetHubDescriptor: | |
400 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
401 | buf); | |
402 | break; | |
403 | case GetHubStatus: | |
404 | /* no hub-wide feature/status flags */ | |
405 | memset (buf, 0, 4); | |
406 | //cpu_to_le32s ((u32 *) buf); | |
407 | break; | |
408 | case GetPortStatus: | |
409 | if (!wIndex || wIndex > ports) | |
410 | goto error; | |
411 | wIndex--; | |
412 | status = 0; | |
413 | temp = readl (&ehci->regs->port_status [wIndex]); | |
414 | ||
415 | // wPortChange bits | |
416 | if (temp & PORT_CSC) | |
417 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
418 | if (temp & PORT_PEC) | |
419 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
420 | if (temp & PORT_OCC) | |
421 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; | |
422 | ||
423 | /* whoever resumes must GetPortStatus to complete it!! */ | |
424 | if ((temp & PORT_RESUME) | |
425 | && time_after (jiffies, | |
426 | ehci->reset_done [wIndex])) { | |
427 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
428 | ehci->reset_done [wIndex] = 0; | |
429 | ||
430 | /* stop resume signaling */ | |
431 | temp = readl (&ehci->regs->port_status [wIndex]); | |
10f6524a | 432 | writel (temp & ~(PORT_RWC_BITS | PORT_RESUME), |
1da177e4 LT |
433 | &ehci->regs->port_status [wIndex]); |
434 | retval = handshake ( | |
435 | &ehci->regs->port_status [wIndex], | |
436 | PORT_RESUME, 0, 2000 /* 2msec */); | |
437 | if (retval != 0) { | |
438 | ehci_err (ehci, "port %d resume error %d\n", | |
439 | wIndex + 1, retval); | |
440 | goto error; | |
441 | } | |
442 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
443 | } | |
444 | ||
445 | /* whoever resets must GetPortStatus to complete it!! */ | |
446 | if ((temp & PORT_RESET) | |
447 | && time_after (jiffies, | |
448 | ehci->reset_done [wIndex])) { | |
449 | status |= 1 << USB_PORT_FEAT_C_RESET; | |
450 | ehci->reset_done [wIndex] = 0; | |
451 | ||
452 | /* force reset to complete */ | |
10f6524a | 453 | writel (temp & ~(PORT_RWC_BITS | PORT_RESET), |
1da177e4 | 454 | &ehci->regs->port_status [wIndex]); |
c22fa3ac DB |
455 | /* REVISIT: some hardware needs 550+ usec to clear |
456 | * this bit; seems too long to spin routinely... | |
457 | */ | |
1da177e4 LT |
458 | retval = handshake ( |
459 | &ehci->regs->port_status [wIndex], | |
c22fa3ac | 460 | PORT_RESET, 0, 750); |
1da177e4 LT |
461 | if (retval != 0) { |
462 | ehci_err (ehci, "port %d reset error %d\n", | |
463 | wIndex + 1, retval); | |
464 | goto error; | |
465 | } | |
466 | ||
467 | /* see what we found out */ | |
468 | temp = check_reset_complete (ehci, wIndex, | |
469 | readl (&ehci->regs->port_status [wIndex])); | |
470 | } | |
471 | ||
472 | // don't show wPortStatus if it's owned by a companion hc | |
473 | if (!(temp & PORT_OWNER)) { | |
474 | if (temp & PORT_CONNECT) { | |
475 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
476 | // status may be from integrated TT | |
477 | status |= ehci_port_speed(ehci, temp); | |
478 | } | |
479 | if (temp & PORT_PE) | |
480 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
481 | if (temp & (PORT_SUSPEND|PORT_RESUME)) | |
482 | status |= 1 << USB_PORT_FEAT_SUSPEND; | |
483 | if (temp & PORT_OC) | |
484 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
485 | if (temp & PORT_RESET) | |
486 | status |= 1 << USB_PORT_FEAT_RESET; | |
487 | if (temp & PORT_POWER) | |
488 | status |= 1 << USB_PORT_FEAT_POWER; | |
489 | } | |
490 | ||
491 | #ifndef EHCI_VERBOSE_DEBUG | |
492 | if (status & ~0xffff) /* only if wPortChange is interesting */ | |
493 | #endif | |
494 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
495 | // we "know" this alignment is good, caller used kmalloc()... | |
496 | *((__le32 *) buf) = cpu_to_le32 (status); | |
497 | break; | |
498 | case SetHubFeature: | |
499 | switch (wValue) { | |
500 | case C_HUB_LOCAL_POWER: | |
501 | case C_HUB_OVER_CURRENT: | |
502 | /* no hub-wide feature/status flags */ | |
503 | break; | |
504 | default: | |
505 | goto error; | |
506 | } | |
507 | break; | |
508 | case SetPortFeature: | |
509 | if (!wIndex || wIndex > ports) | |
510 | goto error; | |
511 | wIndex--; | |
512 | temp = readl (&ehci->regs->port_status [wIndex]); | |
513 | if (temp & PORT_OWNER) | |
514 | break; | |
515 | ||
10f6524a | 516 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
517 | switch (wValue) { |
518 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
519 | if (ehci->no_selective_suspend) |
520 | break; | |
1da177e4 LT |
521 | if ((temp & PORT_PE) == 0 |
522 | || (temp & PORT_RESET) != 0) | |
523 | goto error; | |
2c1c3c4c | 524 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
525 | temp |= PORT_WAKE_BITS; |
526 | writel (temp | PORT_SUSPEND, | |
527 | &ehci->regs->port_status [wIndex]); | |
528 | break; | |
529 | case USB_PORT_FEAT_POWER: | |
530 | if (HCS_PPC (ehci->hcs_params)) | |
531 | writel (temp | PORT_POWER, | |
532 | &ehci->regs->port_status [wIndex]); | |
533 | break; | |
534 | case USB_PORT_FEAT_RESET: | |
535 | if (temp & PORT_RESUME) | |
536 | goto error; | |
537 | /* line status bits may report this as low speed, | |
538 | * which can be fine if this root hub has a | |
539 | * transaction translator built in. | |
540 | */ | |
541 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
542 | && !ehci_is_TDI(ehci) | |
543 | && PORT_USB11 (temp)) { | |
544 | ehci_dbg (ehci, | |
545 | "port %d low speed --> companion\n", | |
546 | wIndex + 1); | |
547 | temp |= PORT_OWNER; | |
548 | } else { | |
549 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
550 | temp |= PORT_RESET; | |
551 | temp &= ~PORT_PE; | |
552 | ||
553 | /* | |
554 | * caller must wait, then call GetPortStatus | |
555 | * usb 2.0 spec says 50 ms resets on root | |
556 | */ | |
557 | ehci->reset_done [wIndex] = jiffies | |
558 | + msecs_to_jiffies (50); | |
559 | } | |
560 | writel (temp, &ehci->regs->port_status [wIndex]); | |
561 | break; | |
562 | default: | |
563 | goto error; | |
564 | } | |
565 | readl (&ehci->regs->command); /* unblock posted writes */ | |
566 | break; | |
567 | ||
568 | default: | |
569 | error: | |
570 | /* "stall" on error */ | |
571 | retval = -EPIPE; | |
572 | } | |
573 | spin_unlock_irqrestore (&ehci->lock, flags); | |
574 | return retval; | |
575 | } |