1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Copyright (C) 2001-2004 by David Brownell |
4 | */ |
5 | |
6 | /* this file is part of ehci-hcd.c */ |
7 | |
8 | /*-------------------------------------------------------------------------*/ |
9 | |
10 | /* |
11 | * EHCI Root Hub ... the nonsharable stuff |
12 | * |
13 | * Registers don't need cpu_to_le32, that happens transparently |
14 | */ |
15 | |
16 | /*-------------------------------------------------------------------------*/ |
17 | |
18 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
19 | |
20 | #ifdef CONFIG_PM |
21 | |
22 | static void unlink_empty_async_suspended(struct ehci_hcd *ehci); |
23 | |
24 | static int persist_enabled_on_companion(struct usb_device *udev, void *unused) |
25 | { |
26 | return !udev->maxchild && udev->persist_enabled && |
27 | udev->bus->root_hub->speed < USB_SPEED_HIGH; |
28 | } |
29 | |
30 | /* After a power loss, ports that were owned by the companion must be |
31 | * reset so that the companion can still own them. |
32 | */ |
33 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) |
34 | { |
35 | u32 __iomem *reg; |
36 | u32 status; |
37 | int port; |
38 | __le32 buf; |
39 | struct usb_hcd *hcd = ehci_to_hcd(ehci); |
40 | |
41 | if (!ehci->owned_ports) |
42 | return; |
43 | |
44 | /* |
45 | * USB 1.1 devices are mostly HIDs, which don't need to persist across |
46 | * suspends. If we ensure that none of our companion's devices have |
47 | * persist_enabled (by looking through all USB 1.1 buses in the system), |
48 | * we can skip this and avoid slowing resume down. Devices without |
49 | * persist will just get reenumerated shortly after resume anyway. |
50 | */ |
51 | if (!usb_for_each_dev(NULL, fn: persist_enabled_on_companion)) |
52 | return; |
53 | |
54 | /* Make sure the ports are powered */ |
55 | port = HCS_N_PORTS(ehci->hcs_params); |
56 | while (port--) { |
57 | if (test_bit(port, &ehci->owned_ports)) { |
58 | reg = &ehci->regs->port_status[port]; |
59 | status = ehci_readl(ehci, regs: reg) & ~PORT_RWC_BITS; |
60 | if (!(status & PORT_POWER)) |
61 | ehci_port_power(ehci, portnum: port, enable: true); |
62 | } |
63 | } |
64 | |
65 | /* Give the connections some time to appear */ |
66 | msleep(msecs: 20); |
67 | |
68 | spin_lock_irq(lock: &ehci->lock); |
69 | port = HCS_N_PORTS(ehci->hcs_params); |
70 | while (port--) { |
71 | if (test_bit(port, &ehci->owned_ports)) { |
72 | reg = &ehci->regs->port_status[port]; |
73 | status = ehci_readl(ehci, regs: reg) & ~PORT_RWC_BITS; |
74 | |
75 | /* Port already owned by companion? */ |
76 | if (status & PORT_OWNER) |
77 | clear_bit(nr: port, addr: &ehci->owned_ports); |
78 | else if (test_bit(port, &ehci->companion_ports)) |
79 | ehci_writel(ehci, val: status & ~PORT_PE, regs: reg); |
80 | else { |
81 | spin_unlock_irq(lock: &ehci->lock); |
82 | ehci_hub_control(hcd, SetPortFeature, |
83 | USB_PORT_FEAT_RESET, wIndex: port + 1, |
84 | NULL, wLength: 0); |
85 | spin_lock_irq(lock: &ehci->lock); |
86 | } |
87 | } |
88 | } |
89 | spin_unlock_irq(lock: &ehci->lock); |
90 | |
91 | if (!ehci->owned_ports) |
92 | return; |
93 | msleep(msecs: 90); /* Wait for resets to complete */ |
94 | |
95 | spin_lock_irq(lock: &ehci->lock); |
96 | port = HCS_N_PORTS(ehci->hcs_params); |
97 | while (port--) { |
98 | if (test_bit(port, &ehci->owned_ports)) { |
99 | spin_unlock_irq(lock: &ehci->lock); |
100 | ehci_hub_control(hcd, GetPortStatus, |
101 | wValue: 0, wIndex: port + 1, |
102 | buf: (char *) &buf, wLength: sizeof(buf)); |
103 | spin_lock_irq(lock: &ehci->lock); |
104 | |
105 | /* The companion should now own the port, |
106 | * but if something went wrong the port must not |
107 | * remain enabled. |
108 | */ |
109 | reg = &ehci->regs->port_status[port]; |
110 | status = ehci_readl(ehci, regs: reg) & ~PORT_RWC_BITS; |
111 | if (status & PORT_OWNER) |
112 | ehci_writel(ehci, val: status | PORT_CSC, regs: reg); |
113 | else { |
114 | ehci_dbg(ehci, "failed handover port %d: %x\n" , |
115 | port + 1, status); |
116 | ehci_writel(ehci, val: status & ~PORT_PE, regs: reg); |
117 | } |
118 | } |
119 | } |
120 | |
121 | ehci->owned_ports = 0; |
122 | spin_unlock_irq(lock: &ehci->lock); |
123 | } |
124 | |
125 | static int ehci_port_change(struct ehci_hcd *ehci) |
126 | { |
127 | int i = HCS_N_PORTS(ehci->hcs_params); |
128 | |
129 | /* First check if the controller indicates a change event */ |
130 | |
131 | if (ehci_readl(ehci, regs: &ehci->regs->status) & STS_PCD) |
132 | return 1; |
133 | |
134 | /* |
135 | * Not all controllers appear to update this while going from D3 to D0, |
136 | * so check the individual port status registers as well |
137 | */ |
138 | |
139 | while (i--) |
140 | if (ehci_readl(ehci, regs: &ehci->regs->port_status[i]) & PORT_CSC) |
141 | return 1; |
142 | |
143 | return 0; |
144 | } |
145 | |
146 | void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
147 | bool suspending, bool do_wakeup) |
148 | { |
149 | int port; |
150 | u32 temp; |
151 | |
152 | /* If remote wakeup is enabled for the root hub but disabled |
153 | * for the controller, we must adjust all the port wakeup flags |
154 | * when the controller is suspended or resumed. In all other |
155 | * cases they don't need to be changed. |
156 | */ |
157 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
158 | return; |
159 | |
160 | spin_lock_irq(lock: &ehci->lock); |
161 | |
162 | /* clear phy low-power mode before changing wakeup flags */ |
163 | if (ehci->has_tdi_phy_lpm) { |
164 | port = HCS_N_PORTS(ehci->hcs_params); |
165 | while (port--) { |
166 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
167 | |
168 | temp = ehci_readl(ehci, regs: hostpc_reg); |
169 | ehci_writel(ehci, val: temp & ~HOSTPC_PHCD, regs: hostpc_reg); |
170 | } |
171 | spin_unlock_irq(lock: &ehci->lock); |
172 | msleep(msecs: 5); |
173 | spin_lock_irq(lock: &ehci->lock); |
174 | } |
175 | |
176 | port = HCS_N_PORTS(ehci->hcs_params); |
177 | while (port--) { |
178 | u32 __iomem *reg = &ehci->regs->port_status[port]; |
179 | u32 t1 = ehci_readl(ehci, regs: reg) & ~PORT_RWC_BITS; |
180 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
181 | |
182 | /* If we are suspending the controller, clear the flags. |
183 | * If we are resuming the controller, set the wakeup flags. |
184 | */ |
185 | if (!suspending) { |
186 | if (t1 & PORT_CONNECT) |
187 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
188 | else |
189 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
190 | } |
191 | ehci_writel(ehci, val: t2, regs: reg); |
192 | } |
193 | |
194 | /* enter phy low-power mode again */ |
195 | if (ehci->has_tdi_phy_lpm) { |
196 | port = HCS_N_PORTS(ehci->hcs_params); |
197 | while (port--) { |
198 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
199 | |
200 | temp = ehci_readl(ehci, regs: hostpc_reg); |
201 | ehci_writel(ehci, val: temp | HOSTPC_PHCD, regs: hostpc_reg); |
202 | } |
203 | } |
204 | |
205 | /* Does the root hub have a port wakeup pending? */ |
206 | if (!suspending && ehci_port_change(ehci)) |
207 | usb_hcd_resume_root_hub(hcd: ehci_to_hcd(ehci)); |
208 | |
209 | spin_unlock_irq(lock: &ehci->lock); |
210 | } |
211 | EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags); |
212 | |
213 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
214 | { |
215 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
216 | int port; |
217 | int mask; |
218 | int changed; |
219 | bool fs_idle_delay; |
220 | |
221 | ehci_dbg(ehci, "suspend root hub\n" ); |
222 | |
223 | if (time_before (jiffies, ehci->next_statechange)) |
224 | msleep(msecs: 5); |
225 | |
226 | /* stop the schedules */ |
227 | ehci_quiesce(ehci); |
228 | |
229 | spin_lock_irq (lock: &ehci->lock); |
230 | if (ehci->rh_state < EHCI_RH_RUNNING) |
231 | goto done; |
232 | |
233 | /* Once the controller is stopped, port resumes that are already |
234 | * in progress won't complete. Hence if remote wakeup is enabled |
235 | * for the root hub and any ports are in the middle of a resume or |
236 | * remote wakeup, we must fail the suspend. |
237 | */ |
238 | if (hcd->self.root_hub->do_remote_wakeup) { |
239 | if (ehci->resuming_ports) { |
240 | spin_unlock_irq(lock: &ehci->lock); |
241 | ehci_dbg(ehci, "suspend failed because a port is resuming\n" ); |
242 | return -EBUSY; |
243 | } |
244 | } |
245 | |
246 | /* Unlike other USB host controller types, EHCI doesn't have |
247 | * any notion of "global" or bus-wide suspend. The driver has |
248 | * to manually suspend all the active unsuspended ports, and |
249 | * then manually resume them in the bus_resume() routine. |
250 | */ |
251 | ehci->bus_suspended = 0; |
252 | ehci->owned_ports = 0; |
253 | changed = 0; |
254 | fs_idle_delay = false; |
255 | port = HCS_N_PORTS(ehci->hcs_params); |
256 | while (port--) { |
257 | u32 __iomem *reg = &ehci->regs->port_status [port]; |
258 | u32 t1 = ehci_readl(ehci, regs: reg) & ~PORT_RWC_BITS; |
259 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
260 | |
261 | /* keep track of which ports we suspend */ |
262 | if (t1 & PORT_OWNER) |
263 | set_bit(nr: port, addr: &ehci->owned_ports); |
264 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { |
265 | t2 |= PORT_SUSPEND; |
266 | set_bit(nr: port, addr: &ehci->bus_suspended); |
267 | } |
268 | |
269 | /* enable remote wakeup on all ports, if told to do so */ |
270 | if (hcd->self.root_hub->do_remote_wakeup) { |
271 | /* only enable appropriate wake bits, otherwise the |
272 | * hardware can not go phy low power mode. If a race |
273 | * condition happens here(connection change during bits |
274 | * set), the port change detection will finally fix it. |
275 | */ |
276 | if (t1 & PORT_CONNECT) |
277 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
278 | else |
279 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
280 | } |
281 | |
282 | if (t1 != t2) { |
283 | /* |
284 | * On some controllers, Wake-On-Disconnect will |
285 | * generate false wakeup signals until the bus |
286 | * switches over to full-speed idle. For their |
287 | * sake, add a delay if we need one. |
288 | */ |
289 | if ((t2 & PORT_WKDISC_E) && |
290 | ehci_port_speed(ehci, portsc: t2) == |
291 | USB_PORT_STAT_HIGH_SPEED) |
292 | fs_idle_delay = true; |
293 | ehci_writel(ehci, val: t2, regs: reg); |
294 | changed = 1; |
295 | } |
296 | } |
297 | spin_unlock_irq(lock: &ehci->lock); |
298 | |
299 | if (changed && ehci_has_fsl_susp_errata(ehci)) |
300 | /* |
301 | * Wait for at least 10 millisecondes to ensure the controller |
302 | * enter the suspend status before initiating a port resume |
303 | * using the Force Port Resume bit (Not-EHCI compatible). |
304 | */ |
305 | usleep_range(min: 10000, max: 20000); |
306 | |
307 | if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { |
308 | /* |
309 | * Wait for HCD to enter low-power mode or for the bus |
310 | * to switch to full-speed idle. |
311 | */ |
312 | usleep_range(min: 5000, max: 5500); |
313 | } |
314 | |
315 | if (changed && ehci->has_tdi_phy_lpm) { |
316 | spin_lock_irq(lock: &ehci->lock); |
317 | port = HCS_N_PORTS(ehci->hcs_params); |
318 | while (port--) { |
319 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
320 | u32 t3; |
321 | |
322 | t3 = ehci_readl(ehci, regs: hostpc_reg); |
323 | ehci_writel(ehci, val: t3 | HOSTPC_PHCD, regs: hostpc_reg); |
324 | t3 = ehci_readl(ehci, regs: hostpc_reg); |
325 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n" , |
326 | port, (t3 & HOSTPC_PHCD) ? |
327 | "succeeded" : "failed" ); |
328 | } |
329 | spin_unlock_irq(lock: &ehci->lock); |
330 | } |
331 | |
332 | /* Apparently some devices need a >= 1-uframe delay here */ |
333 | if (ehci->bus_suspended) |
334 | udelay(150); |
335 | |
336 | /* turn off now-idle HC */ |
337 | ehci_halt (ehci); |
338 | |
339 | spin_lock_irq(lock: &ehci->lock); |
340 | if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
341 | ehci_handle_controller_death(ehci); |
342 | if (ehci->rh_state != EHCI_RH_RUNNING) |
343 | goto done; |
344 | ehci->rh_state = EHCI_RH_SUSPENDED; |
345 | |
346 | unlink_empty_async_suspended(ehci); |
347 | |
348 | /* Some Synopsys controllers mistakenly leave IAA turned on */ |
349 | ehci_writel(ehci, STS_IAA, regs: &ehci->regs->status); |
350 | |
351 | /* Any IAA cycle that started before the suspend is now invalid */ |
352 | end_iaa_cycle(ehci); |
353 | ehci_handle_start_intr_unlinks(ehci); |
354 | ehci_handle_intr_unlinks(ehci); |
355 | end_free_itds(ehci); |
356 | |
357 | /* allow remote wakeup */ |
358 | mask = INTR_MASK; |
359 | if (!hcd->self.root_hub->do_remote_wakeup) |
360 | mask &= ~STS_PCD; |
361 | ehci_writel(ehci, val: mask, regs: &ehci->regs->intr_enable); |
362 | ehci_readl(ehci, regs: &ehci->regs->intr_enable); |
363 | |
364 | done: |
365 | ehci->next_statechange = jiffies + msecs_to_jiffies(m: 10); |
366 | ehci->enabled_hrtimer_events = 0; |
367 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; |
368 | spin_unlock_irq (lock: &ehci->lock); |
369 | |
370 | hrtimer_cancel(timer: &ehci->hrtimer); |
371 | return 0; |
372 | } |
373 | |
374 | |
375 | /* caller has locked the root hub, and should reset/reinit on error */ |
376 | static int ehci_bus_resume (struct usb_hcd *hcd) |
377 | { |
378 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
379 | u32 temp; |
380 | u32 power_okay; |
381 | int i; |
382 | unsigned long resume_needed = 0; |
383 | |
384 | if (time_before (jiffies, ehci->next_statechange)) |
385 | msleep(msecs: 5); |
386 | spin_lock_irq (lock: &ehci->lock); |
387 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
388 | goto shutdown; |
389 | |
390 | if (unlikely(ehci->debug)) { |
391 | if (!dbgp_reset_prep(hcd)) |
392 | ehci->debug = NULL; |
393 | else |
394 | dbgp_external_startup(hcd); |
395 | } |
396 | |
397 | /* Ideally and we've got a real resume here, and no port's power |
398 | * was lost. (For PCI, that means Vaux was maintained.) But we |
399 | * could instead be restoring a swsusp snapshot -- so that BIOS was |
400 | * the last user of the controller, not reset/pm hardware keeping |
401 | * state we gave to it. |
402 | */ |
403 | power_okay = ehci_readl(ehci, regs: &ehci->regs->intr_enable); |
404 | ehci_dbg(ehci, "resume root hub%s\n" , |
405 | power_okay ? "" : " after power loss" ); |
406 | |
407 | /* at least some APM implementations will try to deliver |
408 | * IRQs right away, so delay them until we're ready. |
409 | */ |
410 | ehci_writel(ehci, val: 0, regs: &ehci->regs->intr_enable); |
411 | |
412 | /* re-init operational registers */ |
413 | ehci_writel(ehci, val: 0, regs: &ehci->regs->segment); |
414 | ehci_writel(ehci, val: ehci->periodic_dma, regs: &ehci->regs->frame_list); |
415 | ehci_writel(ehci, val: (u32) ehci->async->qh_dma, regs: &ehci->regs->async_next); |
416 | |
417 | /* restore CMD_RUN, framelist size, and irq threshold */ |
418 | ehci->command |= CMD_RUN; |
419 | ehci_writel(ehci, val: ehci->command, regs: &ehci->regs->command); |
420 | ehci->rh_state = EHCI_RH_RUNNING; |
421 | |
422 | /* |
423 | * According to Bugzilla #8190, the port status for some controllers |
424 | * will be wrong without a delay. At their wrong status, the port |
425 | * is enabled, but not suspended neither resumed. |
426 | */ |
427 | i = HCS_N_PORTS(ehci->hcs_params); |
428 | while (i--) { |
429 | temp = ehci_readl(ehci, regs: &ehci->regs->port_status[i]); |
430 | if ((temp & PORT_PE) && |
431 | !(temp & (PORT_SUSPEND | PORT_RESUME))) { |
432 | ehci_dbg(ehci, "Port status(0x%x) is wrong\n" , temp); |
433 | spin_unlock_irq(lock: &ehci->lock); |
434 | msleep(msecs: 8); |
435 | spin_lock_irq(lock: &ehci->lock); |
436 | break; |
437 | } |
438 | } |
439 | |
440 | if (ehci->shutdown) |
441 | goto shutdown; |
442 | |
443 | /* clear phy low-power mode before resume */ |
444 | if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { |
445 | i = HCS_N_PORTS(ehci->hcs_params); |
446 | while (i--) { |
447 | if (test_bit(i, &ehci->bus_suspended)) { |
448 | u32 __iomem *hostpc_reg = |
449 | &ehci->regs->hostpc[i]; |
450 | |
451 | temp = ehci_readl(ehci, regs: hostpc_reg); |
452 | ehci_writel(ehci, val: temp & ~HOSTPC_PHCD, |
453 | regs: hostpc_reg); |
454 | } |
455 | } |
456 | spin_unlock_irq(lock: &ehci->lock); |
457 | msleep(msecs: 5); |
458 | spin_lock_irq(lock: &ehci->lock); |
459 | if (ehci->shutdown) |
460 | goto shutdown; |
461 | } |
462 | |
463 | /* manually resume the ports we suspended during bus_suspend() */ |
464 | i = HCS_N_PORTS (ehci->hcs_params); |
465 | while (i--) { |
466 | temp = ehci_readl(ehci, regs: &ehci->regs->port_status [i]); |
467 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
468 | if (test_bit(i, &ehci->bus_suspended) && |
469 | (temp & PORT_SUSPEND)) { |
470 | temp |= PORT_RESUME; |
471 | set_bit(nr: i, addr: &resume_needed); |
472 | } |
473 | ehci_writel(ehci, val: temp, regs: &ehci->regs->port_status [i]); |
474 | } |
475 | |
476 | /* |
477 | * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume |
478 | * port |
479 | */ |
480 | if (resume_needed) { |
481 | spin_unlock_irq(lock: &ehci->lock); |
482 | msleep(USB_RESUME_TIMEOUT); |
483 | spin_lock_irq(lock: &ehci->lock); |
484 | if (ehci->shutdown) |
485 | goto shutdown; |
486 | } |
487 | |
488 | i = HCS_N_PORTS (ehci->hcs_params); |
489 | while (i--) { |
490 | temp = ehci_readl(ehci, regs: &ehci->regs->port_status [i]); |
491 | if (test_bit(i, &resume_needed)) { |
492 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
493 | ehci_writel(ehci, val: temp, regs: &ehci->regs->port_status [i]); |
494 | } |
495 | } |
496 | |
497 | ehci->next_statechange = jiffies + msecs_to_jiffies(m: 5); |
498 | spin_unlock_irq(lock: &ehci->lock); |
499 | |
500 | ehci_handover_companion_ports(ehci); |
501 | |
502 | /* Now we can safely re-enable irqs */ |
503 | spin_lock_irq(lock: &ehci->lock); |
504 | if (ehci->shutdown) |
505 | goto shutdown; |
506 | ehci_writel(ehci, INTR_MASK, regs: &ehci->regs->intr_enable); |
507 | (void) ehci_readl(ehci, regs: &ehci->regs->intr_enable); |
508 | spin_unlock_irq(lock: &ehci->lock); |
509 | |
510 | return 0; |
511 | |
512 | shutdown: |
513 | spin_unlock_irq(lock: &ehci->lock); |
514 | return -ESHUTDOWN; |
515 | } |
516 | |
517 | static unsigned long ehci_get_resuming_ports(struct usb_hcd *hcd) |
518 | { |
519 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
520 | |
521 | return ehci->resuming_ports; |
522 | } |
523 | |
524 | #else |
525 | |
526 | #define ehci_bus_suspend NULL |
527 | #define ehci_bus_resume NULL |
528 | #define ehci_get_resuming_ports NULL |
529 | |
530 | #endif /* CONFIG_PM */ |
531 | |
532 | /*-------------------------------------------------------------------------*/ |
533 | |
534 | /* |
535 | * Sets the owner of a port |
536 | */ |
537 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
538 | { |
539 | u32 __iomem *status_reg; |
540 | u32 port_status; |
541 | int try; |
542 | |
543 | status_reg = &ehci->regs->port_status[portnum]; |
544 | |
545 | /* |
546 | * The controller won't set the OWNER bit if the port is |
547 | * enabled, so this loop will sometimes require at least two |
548 | * iterations: one to disable the port and one to set OWNER. |
549 | */ |
550 | for (try = 4; try > 0; --try) { |
551 | spin_lock_irq(lock: &ehci->lock); |
552 | port_status = ehci_readl(ehci, regs: status_reg); |
553 | if ((port_status & PORT_OWNER) == new_owner |
554 | || (port_status & (PORT_OWNER | PORT_CONNECT)) |
555 | == 0) |
556 | try = 0; |
557 | else { |
558 | port_status ^= PORT_OWNER; |
559 | port_status &= ~(PORT_PE | PORT_RWC_BITS); |
560 | ehci_writel(ehci, val: port_status, regs: status_reg); |
561 | } |
562 | spin_unlock_irq(lock: &ehci->lock); |
563 | if (try > 1) |
564 | msleep(msecs: 5); |
565 | } |
566 | } |
567 | |
568 | /*-------------------------------------------------------------------------*/ |
569 | |
570 | static int check_reset_complete ( |
571 | struct ehci_hcd *ehci, |
572 | int index, |
573 | u32 __iomem *status_reg, |
574 | int port_status |
575 | ) { |
576 | if (!(port_status & PORT_CONNECT)) |
577 | return port_status; |
578 | |
579 | /* if reset finished and it's still not enabled -- handoff */ |
580 | if (!(port_status & PORT_PE)) { |
581 | |
582 | /* with integrated TT, there's nobody to hand it to! */ |
583 | if (ehci_is_TDI(ehci)) { |
584 | ehci_dbg (ehci, |
585 | "Failed to enable port %d on root hub TT\n" , |
586 | index+1); |
587 | return port_status; |
588 | } |
589 | |
590 | ehci_dbg (ehci, "port %d full speed --> companion\n" , |
591 | index + 1); |
592 | |
593 | // what happens if HCS_N_CC(params) == 0 ? |
594 | port_status |= PORT_OWNER; |
595 | port_status &= ~PORT_RWC_BITS; |
596 | ehci_writel(ehci, val: port_status, regs: status_reg); |
597 | |
598 | /* ensure 440EPX ohci controller state is operational */ |
599 | if (ehci->has_amcc_usb23) |
600 | set_ohci_hcfs(ehci, operational: 1); |
601 | } else { |
602 | ehci_dbg(ehci, "port %d reset complete, port enabled\n" , |
603 | index + 1); |
604 | /* ensure 440EPx ohci controller state is suspended */ |
605 | if (ehci->has_amcc_usb23) |
606 | set_ohci_hcfs(ehci, operational: 0); |
607 | } |
608 | |
609 | return port_status; |
610 | } |
611 | |
612 | /*-------------------------------------------------------------------------*/ |
613 | |
614 | |
615 | /* build "status change" packet (one or two bytes) from HC registers */ |
616 | |
617 | static int |
618 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) |
619 | { |
620 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
621 | u32 temp, status; |
622 | u32 mask; |
623 | int ports, i, retval = 1; |
624 | unsigned long flags; |
625 | u32 ppcd = ~0; |
626 | |
627 | /* init status to no-changes */ |
628 | buf [0] = 0; |
629 | ports = HCS_N_PORTS (ehci->hcs_params); |
630 | if (ports > 7) { |
631 | buf [1] = 0; |
632 | retval++; |
633 | } |
634 | |
635 | /* Inform the core about resumes-in-progress by returning |
636 | * a non-zero value even if there are no status changes. |
637 | */ |
638 | status = ehci->resuming_ports; |
639 | |
640 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
641 | * causing massive log spam unless we completely ignore them. It |
642 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
643 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
644 | * PORT_POWER; that's surprising, but maybe within-spec. |
645 | */ |
646 | if (!ignore_oc && !ehci->spurious_oc) |
647 | mask = PORT_CSC | PORT_PEC | PORT_OCC; |
648 | else |
649 | mask = PORT_CSC | PORT_PEC; |
650 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND |
651 | |
652 | /* no hub change reports (bit 0) for now (power, ...) */ |
653 | |
654 | /* port N changes (bit N)? */ |
655 | spin_lock_irqsave (&ehci->lock, flags); |
656 | |
657 | /* get per-port change detect bits */ |
658 | if (ehci->has_ppcd) |
659 | ppcd = ehci_readl(ehci, regs: &ehci->regs->status) >> 16; |
660 | |
661 | for (i = 0; i < ports; i++) { |
662 | /* leverage per-port change bits feature */ |
663 | if (ppcd & (1 << i)) |
664 | temp = ehci_readl(ehci, regs: &ehci->regs->port_status[i]); |
665 | else |
666 | temp = 0; |
667 | |
668 | /* |
669 | * Return status information even for ports with OWNER set. |
670 | * Otherwise hub_wq wouldn't see the disconnect event when a |
671 | * high-speed device is switched over to the companion |
672 | * controller by the user. |
673 | */ |
674 | |
675 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
676 | || (ehci->reset_done[i] && time_after_eq( |
677 | jiffies, ehci->reset_done[i])) |
678 | || ehci_has_ci_pec_bug(ehci, temp)) { |
679 | if (i < 7) |
680 | buf [0] |= 1 << (i + 1); |
681 | else |
682 | buf [1] |= 1 << (i - 7); |
683 | status = STS_PCD; |
684 | } |
685 | } |
686 | |
687 | /* If a resume is in progress, make sure it can finish */ |
688 | if (ehci->resuming_ports) |
689 | mod_timer(timer: &hcd->rh_timer, expires: jiffies + msecs_to_jiffies(m: 25)); |
690 | |
691 | spin_unlock_irqrestore (lock: &ehci->lock, flags); |
692 | return status ? retval : 0; |
693 | } |
694 | |
695 | /*-------------------------------------------------------------------------*/ |
696 | |
697 | static void |
698 | ehci_hub_descriptor ( |
699 | struct ehci_hcd *ehci, |
700 | struct usb_hub_descriptor *desc |
701 | ) { |
702 | int ports = HCS_N_PORTS (ehci->hcs_params); |
703 | u16 temp; |
704 | |
705 | desc->bDescriptorType = USB_DT_HUB; |
706 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ |
707 | desc->bHubContrCurrent = 0; |
708 | |
709 | desc->bNbrPorts = ports; |
710 | temp = 1 + (ports / 8); |
711 | desc->bDescLength = 7 + 2 * temp; |
712 | |
713 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
714 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
715 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); |
716 | |
717 | temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ |
718 | if (HCS_PPC (ehci->hcs_params)) |
719 | temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ |
720 | else |
721 | temp |= HUB_CHAR_NO_LPSM; /* no power switching */ |
722 | #if 0 |
723 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. |
724 | if (HCS_INDICATOR (ehci->hcs_params)) |
725 | temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ |
726 | #endif |
727 | desc->wHubCharacteristics = cpu_to_le16(temp); |
728 | } |
729 | |
730 | /*-------------------------------------------------------------------------*/ |
731 | |
732 | int ehci_hub_control( |
733 | struct usb_hcd *hcd, |
734 | u16 typeReq, |
735 | u16 wValue, |
736 | u16 wIndex, |
737 | char *buf, |
738 | u16 wLength |
739 | ) { |
740 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
741 | int ports = HCS_N_PORTS (ehci->hcs_params); |
742 | u32 __iomem *status_reg, *hostpc_reg; |
743 | u32 temp, temp1, status; |
744 | unsigned long flags; |
745 | int retval = 0; |
746 | unsigned selector; |
747 | |
748 | /* |
749 | * Avoid out-of-bounds values while calculating the port index |
750 | * from wIndex. The compiler doesn't like pointers to invalid |
751 | * addresses, even if they are never used. |
752 | */ |
753 | temp = (wIndex - 1) & 0xff; |
754 | if (temp >= HCS_N_PORTS_MAX) |
755 | temp = 0; |
756 | status_reg = &ehci->regs->port_status[temp]; |
757 | hostpc_reg = &ehci->regs->hostpc[temp]; |
758 | |
759 | /* |
760 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. |
761 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. |
762 | * (track current state ourselves) ... blink for diagnostics, |
763 | * power, "this is the one", etc. EHCI spec supports this. |
764 | */ |
765 | |
766 | spin_lock_irqsave (&ehci->lock, flags); |
767 | switch (typeReq) { |
768 | case ClearHubFeature: |
769 | switch (wValue) { |
770 | case C_HUB_LOCAL_POWER: |
771 | case C_HUB_OVER_CURRENT: |
772 | /* no hub-wide feature/status flags */ |
773 | break; |
774 | default: |
775 | goto error; |
776 | } |
777 | break; |
778 | case ClearPortFeature: |
779 | if (!wIndex || wIndex > ports) |
780 | goto error; |
781 | wIndex--; |
782 | temp = ehci_readl(ehci, regs: status_reg); |
783 | temp &= ~PORT_RWC_BITS; |
784 | |
785 | /* |
786 | * Even if OWNER is set, so the port is owned by the |
787 | * companion controller, hub_wq needs to be able to clear |
788 | * the port-change status bits (especially |
789 | * USB_PORT_STAT_C_CONNECTION). |
790 | */ |
791 | |
792 | switch (wValue) { |
793 | case USB_PORT_FEAT_ENABLE: |
794 | ehci_writel(ehci, val: temp & ~PORT_PE, regs: status_reg); |
795 | break; |
796 | case USB_PORT_FEAT_C_ENABLE: |
797 | ehci_writel(ehci, val: temp | PORT_PEC, regs: status_reg); |
798 | break; |
799 | case USB_PORT_FEAT_SUSPEND: |
800 | if (temp & PORT_RESET) |
801 | goto error; |
802 | if (ehci->no_selective_suspend) |
803 | break; |
804 | #ifdef CONFIG_USB_OTG |
805 | if ((hcd->self.otg_port == (wIndex + 1)) |
806 | && hcd->self.b_hnp_enable) { |
807 | otg_start_hnp(otg: hcd->usb_phy->otg); |
808 | break; |
809 | } |
810 | #endif |
811 | if (!(temp & PORT_SUSPEND)) |
812 | break; |
813 | if ((temp & PORT_PE) == 0) |
814 | goto error; |
815 | |
816 | /* clear phy low-power mode before resume */ |
817 | if (ehci->has_tdi_phy_lpm) { |
818 | temp1 = ehci_readl(ehci, regs: hostpc_reg); |
819 | ehci_writel(ehci, val: temp1 & ~HOSTPC_PHCD, |
820 | regs: hostpc_reg); |
821 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
822 | msleep(msecs: 5);/* wait to leave low-power mode */ |
823 | spin_lock_irqsave(&ehci->lock, flags); |
824 | } |
825 | /* resume signaling for 20 msec */ |
826 | temp &= ~PORT_WAKE_BITS; |
827 | ehci_writel(ehci, val: temp | PORT_RESUME, regs: status_reg); |
828 | ehci->reset_done[wIndex] = jiffies |
829 | + msecs_to_jiffies(USB_RESUME_TIMEOUT); |
830 | set_bit(nr: wIndex, addr: &ehci->resuming_ports); |
831 | usb_hcd_start_port_resume(bus: &hcd->self, portnum: wIndex); |
832 | break; |
833 | case USB_PORT_FEAT_C_SUSPEND: |
834 | clear_bit(nr: wIndex, addr: &ehci->port_c_suspend); |
835 | break; |
836 | case USB_PORT_FEAT_POWER: |
837 | if (HCS_PPC(ehci->hcs_params)) { |
838 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
839 | ehci_port_power(ehci, portnum: wIndex, enable: false); |
840 | spin_lock_irqsave(&ehci->lock, flags); |
841 | } |
842 | break; |
843 | case USB_PORT_FEAT_C_CONNECTION: |
844 | ehci_writel(ehci, val: temp | PORT_CSC, regs: status_reg); |
845 | break; |
846 | case USB_PORT_FEAT_C_OVER_CURRENT: |
847 | ehci_writel(ehci, val: temp | PORT_OCC, regs: status_reg); |
848 | break; |
849 | case USB_PORT_FEAT_C_RESET: |
850 | /* GetPortStatus clears reset */ |
851 | break; |
852 | default: |
853 | goto error; |
854 | } |
855 | ehci_readl(ehci, regs: &ehci->regs->command); /* unblock posted write */ |
856 | break; |
857 | case GetHubDescriptor: |
858 | ehci_hub_descriptor (ehci, desc: (struct usb_hub_descriptor *) |
859 | buf); |
860 | break; |
861 | case GetHubStatus: |
862 | /* no hub-wide feature/status flags */ |
863 | memset (buf, 0, 4); |
864 | //cpu_to_le32s ((u32 *) buf); |
865 | break; |
866 | case GetPortStatus: |
867 | if (!wIndex || wIndex > ports) |
868 | goto error; |
869 | wIndex--; |
870 | status = 0; |
871 | temp = ehci_readl(ehci, regs: status_reg); |
872 | |
873 | // wPortChange bits |
874 | if (temp & PORT_CSC) |
875 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
876 | if (temp & PORT_PEC) |
877 | status |= USB_PORT_STAT_C_ENABLE << 16; |
878 | |
879 | if (ehci_has_ci_pec_bug(ehci, temp)) { |
880 | status |= USB_PORT_STAT_C_ENABLE << 16; |
881 | ehci_info(ehci, |
882 | "PE is cleared by HW port:%d PORTSC:%08x\n" , |
883 | wIndex + 1, temp); |
884 | } |
885 | |
886 | if ((temp & PORT_OCC) && (!ignore_oc && !ehci->spurious_oc)){ |
887 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
888 | |
889 | /* |
890 | * Hubs should disable port power on over-current. |
891 | * However, not all EHCI implementations do this |
892 | * automatically, even if they _do_ support per-port |
893 | * power switching; they're allowed to just limit the |
894 | * current. hub_wq will turn the power back on. |
895 | */ |
896 | if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
897 | && HCS_PPC(ehci->hcs_params)) { |
898 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
899 | ehci_port_power(ehci, portnum: wIndex, enable: false); |
900 | spin_lock_irqsave(&ehci->lock, flags); |
901 | temp = ehci_readl(ehci, regs: status_reg); |
902 | } |
903 | } |
904 | |
905 | /* no reset or resume pending */ |
906 | if (!ehci->reset_done[wIndex]) { |
907 | |
908 | /* Remote Wakeup received? */ |
909 | if (temp & PORT_RESUME) { |
910 | /* resume signaling for 20 msec */ |
911 | ehci->reset_done[wIndex] = jiffies |
912 | + msecs_to_jiffies(m: 20); |
913 | usb_hcd_start_port_resume(bus: &hcd->self, portnum: wIndex); |
914 | set_bit(nr: wIndex, addr: &ehci->resuming_ports); |
915 | /* check the port again */ |
916 | mod_timer(timer: &ehci_to_hcd(ehci)->rh_timer, |
917 | expires: ehci->reset_done[wIndex]); |
918 | } |
919 | |
920 | /* reset or resume not yet complete */ |
921 | } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { |
922 | ; /* wait until it is complete */ |
923 | |
924 | /* resume completed */ |
925 | } else if (test_bit(wIndex, &ehci->resuming_ports)) { |
926 | clear_bit(nr: wIndex, addr: &ehci->suspended_ports); |
927 | set_bit(nr: wIndex, addr: &ehci->port_c_suspend); |
928 | ehci->reset_done[wIndex] = 0; |
929 | usb_hcd_end_port_resume(bus: &hcd->self, portnum: wIndex); |
930 | |
931 | /* stop resume signaling */ |
932 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
933 | ehci_writel(ehci, val: temp, regs: status_reg); |
934 | clear_bit(nr: wIndex, addr: &ehci->resuming_ports); |
935 | retval = ehci_handshake(ehci, status_reg, |
936 | PORT_RESUME, 0, 2000 /* 2msec */); |
937 | if (retval != 0) { |
938 | ehci_err(ehci, "port %d resume error %d\n" , |
939 | wIndex + 1, retval); |
940 | goto error; |
941 | } |
942 | temp = ehci_readl(ehci, regs: status_reg); |
943 | |
944 | /* whoever resets must GetPortStatus to complete it!! */ |
945 | } else { |
946 | status |= USB_PORT_STAT_C_RESET << 16; |
947 | ehci->reset_done [wIndex] = 0; |
948 | |
949 | /* force reset to complete */ |
950 | ehci_writel(ehci, val: temp & ~(PORT_RWC_BITS | PORT_RESET), |
951 | regs: status_reg); |
952 | /* REVISIT: some hardware needs 550+ usec to clear |
953 | * this bit; seems too long to spin routinely... |
954 | */ |
955 | retval = ehci_handshake(ehci, status_reg, |
956 | PORT_RESET, 0, 1000); |
957 | if (retval != 0) { |
958 | ehci_err (ehci, "port %d reset error %d\n" , |
959 | wIndex + 1, retval); |
960 | goto error; |
961 | } |
962 | |
963 | /* see what we found out */ |
964 | temp = check_reset_complete (ehci, index: wIndex, status_reg, |
965 | port_status: ehci_readl(ehci, regs: status_reg)); |
966 | } |
967 | |
968 | /* transfer dedicated ports to the companion hc */ |
969 | if ((temp & PORT_CONNECT) && |
970 | test_bit(wIndex, &ehci->companion_ports)) { |
971 | temp &= ~PORT_RWC_BITS; |
972 | temp |= PORT_OWNER; |
973 | ehci_writel(ehci, val: temp, regs: status_reg); |
974 | ehci_dbg(ehci, "port %d --> companion\n" , wIndex + 1); |
975 | temp = ehci_readl(ehci, regs: status_reg); |
976 | } |
977 | |
978 | /* |
979 | * Even if OWNER is set, there's no harm letting hub_wq |
980 | * see the wPortStatus values (they should all be 0 except |
981 | * for PORT_POWER anyway). |
982 | */ |
983 | |
984 | if (temp & PORT_CONNECT) { |
985 | status |= USB_PORT_STAT_CONNECTION; |
986 | // status may be from integrated TT |
987 | if (ehci->has_hostpc) { |
988 | temp1 = ehci_readl(ehci, regs: hostpc_reg); |
989 | status |= ehci_port_speed(ehci, portsc: temp1); |
990 | } else |
991 | status |= ehci_port_speed(ehci, portsc: temp); |
992 | } |
993 | if (temp & PORT_PE) |
994 | status |= USB_PORT_STAT_ENABLE; |
995 | |
996 | /* maybe the port was unsuspended without our knowledge */ |
997 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { |
998 | status |= USB_PORT_STAT_SUSPEND; |
999 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
1000 | clear_bit(nr: wIndex, addr: &ehci->suspended_ports); |
1001 | clear_bit(nr: wIndex, addr: &ehci->resuming_ports); |
1002 | ehci->reset_done[wIndex] = 0; |
1003 | if (temp & PORT_PE) |
1004 | set_bit(nr: wIndex, addr: &ehci->port_c_suspend); |
1005 | usb_hcd_end_port_resume(bus: &hcd->self, portnum: wIndex); |
1006 | } |
1007 | |
1008 | if (temp & PORT_OC) |
1009 | status |= USB_PORT_STAT_OVERCURRENT; |
1010 | if (temp & PORT_RESET) |
1011 | status |= USB_PORT_STAT_RESET; |
1012 | if (temp & PORT_POWER) |
1013 | status |= USB_PORT_STAT_POWER; |
1014 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
1015 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1016 | |
1017 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
1018 | dbg_port(ehci, label: "GetStatus" , port: wIndex + 1, status: temp); |
1019 | put_unaligned_le32(val: status, p: buf); |
1020 | break; |
1021 | case SetHubFeature: |
1022 | switch (wValue) { |
1023 | case C_HUB_LOCAL_POWER: |
1024 | case C_HUB_OVER_CURRENT: |
1025 | /* no hub-wide feature/status flags */ |
1026 | break; |
1027 | default: |
1028 | goto error; |
1029 | } |
1030 | break; |
1031 | case SetPortFeature: |
1032 | selector = wIndex >> 8; |
1033 | wIndex &= 0xff; |
1034 | if (unlikely(ehci->debug)) { |
1035 | /* If the debug port is active any port |
1036 | * feature requests should get denied */ |
1037 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && |
1038 | (readl(addr: &ehci->debug->control) & DBGP_ENABLED)) { |
1039 | retval = -ENODEV; |
1040 | goto error_exit; |
1041 | } |
1042 | } |
1043 | if (!wIndex || wIndex > ports) |
1044 | goto error; |
1045 | wIndex--; |
1046 | temp = ehci_readl(ehci, regs: status_reg); |
1047 | if (temp & PORT_OWNER) |
1048 | break; |
1049 | |
1050 | temp &= ~PORT_RWC_BITS; |
1051 | switch (wValue) { |
1052 | case USB_PORT_FEAT_SUSPEND: |
1053 | if (ehci->no_selective_suspend) |
1054 | break; |
1055 | if ((temp & PORT_PE) == 0 |
1056 | || (temp & PORT_RESET) != 0) |
1057 | goto error; |
1058 | |
1059 | /* After above check the port must be connected. |
1060 | * Set appropriate bit thus could put phy into low power |
1061 | * mode if we have tdi_phy_lpm feature |
1062 | */ |
1063 | temp &= ~PORT_WKCONN_E; |
1064 | temp |= PORT_WKDISC_E | PORT_WKOC_E; |
1065 | ehci_writel(ehci, val: temp | PORT_SUSPEND, regs: status_reg); |
1066 | if (ehci->has_tdi_phy_lpm) { |
1067 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
1068 | msleep(msecs: 5);/* 5ms for HCD enter low pwr mode */ |
1069 | spin_lock_irqsave(&ehci->lock, flags); |
1070 | temp1 = ehci_readl(ehci, regs: hostpc_reg); |
1071 | ehci_writel(ehci, val: temp1 | HOSTPC_PHCD, |
1072 | regs: hostpc_reg); |
1073 | temp1 = ehci_readl(ehci, regs: hostpc_reg); |
1074 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n" , |
1075 | wIndex, (temp1 & HOSTPC_PHCD) ? |
1076 | "succeeded" : "failed" ); |
1077 | } |
1078 | if (ehci_has_fsl_susp_errata(ehci)) { |
1079 | /* 10ms for HCD enter suspend */ |
1080 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
1081 | usleep_range(min: 10000, max: 20000); |
1082 | spin_lock_irqsave(&ehci->lock, flags); |
1083 | } |
1084 | set_bit(nr: wIndex, addr: &ehci->suspended_ports); |
1085 | break; |
1086 | case USB_PORT_FEAT_POWER: |
1087 | if (HCS_PPC(ehci->hcs_params)) { |
1088 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
1089 | ehci_port_power(ehci, portnum: wIndex, enable: true); |
1090 | spin_lock_irqsave(&ehci->lock, flags); |
1091 | } |
1092 | break; |
1093 | case USB_PORT_FEAT_RESET: |
1094 | if (temp & (PORT_SUSPEND|PORT_RESUME)) |
1095 | goto error; |
1096 | /* line status bits may report this as low speed, |
1097 | * which can be fine if this root hub has a |
1098 | * transaction translator built in. |
1099 | */ |
1100 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT |
1101 | && !ehci_is_TDI(ehci) |
1102 | && PORT_USB11 (temp)) { |
1103 | ehci_dbg (ehci, |
1104 | "port %d low speed --> companion\n" , |
1105 | wIndex + 1); |
1106 | temp |= PORT_OWNER; |
1107 | } else { |
1108 | temp |= PORT_RESET; |
1109 | temp &= ~PORT_PE; |
1110 | |
1111 | /* |
1112 | * caller must wait, then call GetPortStatus |
1113 | * usb 2.0 spec says 50 ms resets on root |
1114 | */ |
1115 | ehci->reset_done [wIndex] = jiffies |
1116 | + msecs_to_jiffies (m: 50); |
1117 | |
1118 | /* |
1119 | * Force full-speed connect for FSL high-speed |
1120 | * erratum; disable HS Chirp by setting PFSC bit |
1121 | */ |
1122 | if (ehci_has_fsl_hs_errata(ehci)) |
1123 | temp |= (1 << PORTSC_FSL_PFSC); |
1124 | } |
1125 | ehci_writel(ehci, val: temp, regs: status_reg); |
1126 | break; |
1127 | |
1128 | /* For downstream facing ports (these): one hub port is put |
1129 | * into test mode according to USB2 11.24.2.13, then the hub |
1130 | * must be reset (which for root hub now means rmmod+modprobe, |
1131 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info |
1132 | * about the EHCI-specific stuff. |
1133 | */ |
1134 | case USB_PORT_FEAT_TEST: |
1135 | #ifdef CONFIG_USB_HCD_TEST_MODE |
1136 | if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
1137 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
1138 | retval = ehset_single_step_set_feature(hcd, |
1139 | port: wIndex + 1); |
1140 | spin_lock_irqsave(&ehci->lock, flags); |
1141 | break; |
1142 | } |
1143 | #endif |
1144 | if (!selector || selector > 5) |
1145 | goto error; |
1146 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
1147 | ehci_quiesce(ehci); |
1148 | spin_lock_irqsave(&ehci->lock, flags); |
1149 | |
1150 | /* Put all enabled ports into suspend */ |
1151 | while (ports--) { |
1152 | u32 __iomem *sreg = |
1153 | &ehci->regs->port_status[ports]; |
1154 | |
1155 | temp = ehci_readl(ehci, regs: sreg) & ~PORT_RWC_BITS; |
1156 | if (temp & PORT_PE) |
1157 | ehci_writel(ehci, val: temp | PORT_SUSPEND, |
1158 | regs: sreg); |
1159 | } |
1160 | |
1161 | spin_unlock_irqrestore(lock: &ehci->lock, flags); |
1162 | ehci_halt(ehci); |
1163 | spin_lock_irqsave(&ehci->lock, flags); |
1164 | |
1165 | temp = ehci_readl(ehci, regs: status_reg); |
1166 | temp |= selector << 16; |
1167 | ehci_writel(ehci, val: temp, regs: status_reg); |
1168 | break; |
1169 | |
1170 | default: |
1171 | goto error; |
1172 | } |
1173 | ehci_readl(ehci, regs: &ehci->regs->command); /* unblock posted writes */ |
1174 | break; |
1175 | |
1176 | default: |
1177 | error: |
1178 | /* "stall" on error */ |
1179 | retval = -EPIPE; |
1180 | } |
1181 | error_exit: |
1182 | spin_unlock_irqrestore (lock: &ehci->lock, flags); |
1183 | return retval; |
1184 | } |
1185 | EXPORT_SYMBOL_GPL(ehci_hub_control); |
1186 | |
1187 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
1188 | { |
1189 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
1190 | |
1191 | if (ehci_is_TDI(ehci)) |
1192 | return; |
1193 | set_owner(ehci, portnum: --portnum, PORT_OWNER); |
1194 | } |
1195 | |
1196 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
1197 | { |
1198 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
1199 | u32 __iomem *reg; |
1200 | |
1201 | if (ehci_is_TDI(ehci)) |
1202 | return 0; |
1203 | reg = &ehci->regs->port_status[portnum - 1]; |
1204 | return ehci_readl(ehci, regs: reg) & PORT_OWNER; |
1205 | } |
1206 | |
1207 | static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) |
1208 | { |
1209 | struct usb_hcd *hcd = ehci_to_hcd(ehci); |
1210 | u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; |
1211 | u32 temp = ehci_readl(ehci, regs: status_reg) & ~PORT_RWC_BITS; |
1212 | |
1213 | if (enable) |
1214 | ehci_writel(ehci, val: temp | PORT_POWER, regs: status_reg); |
1215 | else |
1216 | ehci_writel(ehci, val: temp & ~PORT_POWER, regs: status_reg); |
1217 | |
1218 | if (hcd->driver->port_power) |
1219 | hcd->driver->port_power(hcd, portnum, enable); |
1220 | |
1221 | return 0; |
1222 | } |
1223 | |