Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 | 2 | /* |
d49d4317 | 3 | * Copyright (C) 2001-2004 by David Brownell |
1da177e4 LT |
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 | ||
58a97ffe AS |
18 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
19 | ||
aff6d18f AS |
20 | #ifdef CONFIG_PM |
21 | ||
1586ba0c AS |
22 | static void unlink_empty_async_suspended(struct ehci_hcd *ehci); |
23 | ||
9b790915 JW |
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 | ||
383975d7 AS |
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 | ||
9b790915 JW |
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, persist_enabled_on_companion)) | |
52 | return; | |
53 | ||
c73cee71 AS |
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, reg) & ~PORT_RWC_BITS; | |
11a7e594 MG |
60 | if (!(status & PORT_POWER)) |
61 | ehci_port_power(ehci, port, true); | |
c73cee71 AS |
62 | } |
63 | } | |
64 | ||
383975d7 AS |
65 | /* Give the connections some time to appear */ |
66 | msleep(20); | |
67 | ||
c4f34764 | 68 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
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]; | |
3c519b84 | 73 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
74 | |
75 | /* Port already owned by companion? */ | |
76 | if (status & PORT_OWNER) | |
77 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
78 | else if (test_bit(port, &ehci->companion_ports)) |
79 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
c4f34764 AS |
80 | else { |
81 | spin_unlock_irq(&ehci->lock); | |
383975d7 AS |
82 | ehci_hub_control(hcd, SetPortFeature, |
83 | USB_PORT_FEAT_RESET, port + 1, | |
84 | NULL, 0); | |
c4f34764 AS |
85 | spin_lock_irq(&ehci->lock); |
86 | } | |
383975d7 AS |
87 | } |
88 | } | |
c4f34764 | 89 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
90 | |
91 | if (!ehci->owned_ports) | |
92 | return; | |
93 | msleep(90); /* Wait for resets to complete */ | |
94 | ||
c4f34764 | 95 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
96 | port = HCS_N_PORTS(ehci->hcs_params); |
97 | while (port--) { | |
98 | if (test_bit(port, &ehci->owned_ports)) { | |
c4f34764 | 99 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
100 | ehci_hub_control(hcd, GetPortStatus, |
101 | 0, port + 1, | |
102 | (char *) &buf, sizeof(buf)); | |
c4f34764 | 103 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
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, reg) & ~PORT_RWC_BITS; | |
111 | if (status & PORT_OWNER) | |
112 | ehci_writel(ehci, status | PORT_CSC, reg); | |
113 | else { | |
114 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
115 | port + 1, status); | |
116 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
117 | } | |
118 | } | |
119 | } | |
120 | ||
121 | ehci->owned_ports = 0; | |
c4f34764 | 122 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
123 | } |
124 | ||
c5cf9212 | 125 | static int ehci_port_change(struct ehci_hcd *ehci) |
294d95f2 MG |
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, &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, &ehci->regs->port_status[i]) & PORT_CSC) | |
141 | return 1; | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
74db22cb | 146 | void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 147 | bool suspending, bool do_wakeup) |
16032c4f AS |
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 | */ | |
4147200d | 157 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
158 | return; |
159 | ||
c4f34764 | 160 | spin_lock_irq(&ehci->lock); |
148fc55f | 161 | |
16032c4f | 162 | /* clear phy low-power mode before changing wakeup flags */ |
2cdcec4f | 163 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
164 | port = HCS_N_PORTS(ehci->hcs_params); |
165 | while (port--) { | |
a46af4eb | 166 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 167 | |
16032c4f AS |
168 | temp = ehci_readl(ehci, hostpc_reg); |
169 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
170 | } | |
c4f34764 | 171 | spin_unlock_irq(&ehci->lock); |
16032c4f | 172 | msleep(5); |
c4f34764 | 173 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
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, 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 | } | |
16032c4f AS |
191 | ehci_writel(ehci, t2, reg); |
192 | } | |
193 | ||
194 | /* enter phy low-power mode again */ | |
2cdcec4f | 195 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
196 | port = HCS_N_PORTS(ehci->hcs_params); |
197 | while (port--) { | |
a46af4eb | 198 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 199 | |
16032c4f AS |
200 | temp = ehci_readl(ehci, hostpc_reg); |
201 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
202 | } | |
203 | } | |
ee0b9be8 AS |
204 | |
205 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 206 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 207 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f | 208 | |
c4f34764 | 209 | spin_unlock_irq(&ehci->lock); |
16032c4f | 210 | } |
74db22cb | 211 | EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags); |
16032c4f | 212 | |
0c0382e3 | 213 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
214 | { |
215 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
216 | int port; | |
8c03356a | 217 | int mask; |
16032c4f | 218 | int changed; |
3e8d6d85 | 219 | bool fs_idle_delay; |
1da177e4 | 220 | |
8c774fe8 AS |
221 | ehci_dbg(ehci, "suspend root hub\n"); |
222 | ||
1da177e4 LT |
223 | if (time_before (jiffies, ehci->next_statechange)) |
224 | msleep(5); | |
225 | ||
c4f34764 AS |
226 | /* stop the schedules */ |
227 | ehci_quiesce(ehci); | |
228 | ||
1da177e4 | 229 | spin_lock_irq (&ehci->lock); |
43fe3a99 AS |
230 | if (ehci->rh_state < EHCI_RH_RUNNING) |
231 | goto done; | |
1da177e4 | 232 | |
cec3a53c AS |
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) { | |
a448e4dc AS |
239 | if (ehci->resuming_ports) { |
240 | spin_unlock_irq(&ehci->lock); | |
241 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); | |
242 | return -EBUSY; | |
cec3a53c AS |
243 | } |
244 | } | |
245 | ||
8c03356a AS |
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; | |
383975d7 | 252 | ehci->owned_ports = 0; |
16032c4f | 253 | changed = 0; |
3e8d6d85 | 254 | fs_idle_delay = false; |
cec3a53c | 255 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
256 | while (port--) { |
257 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 258 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 259 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 260 | |
8c03356a | 261 | /* keep track of which ports we suspend */ |
383975d7 AS |
262 | if (t1 & PORT_OWNER) |
263 | set_bit(port, &ehci->owned_ports); | |
264 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 265 | t2 |= PORT_SUSPEND; |
8c03356a AS |
266 | set_bit(port, &ehci->bus_suspended); |
267 | } | |
268 | ||
16032c4f | 269 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
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 | */ | |
16032c4f | 276 | if (t1 & PORT_CONNECT) |
331ac6b2 | 277 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 278 | else |
331ac6b2 | 279 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 280 | } |
1da177e4 LT |
281 | |
282 | if (t1 != t2) { | |
3e8d6d85 AS |
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, t2) == | |
291 | USB_PORT_STAT_HIGH_SPEED) | |
292 | fs_idle_delay = true; | |
083522d7 | 293 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
294 | changed = 1; |
295 | } | |
296 | } | |
3e8d6d85 AS |
297 | spin_unlock_irq(&ehci->lock); |
298 | ||
9d4b8270 CH |
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(10000, 20000); | |
306 | ||
3e8d6d85 AS |
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(5000, 5500); | |
313 | } | |
331ac6b2 | 314 | |
2cdcec4f | 315 | if (changed && ehci->has_tdi_phy_lpm) { |
16032c4f | 316 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
317 | port = HCS_N_PORTS(ehci->hcs_params); |
318 | while (port--) { | |
a46af4eb | 319 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f AS |
320 | u32 t3; |
321 | ||
16032c4f AS |
322 | t3 = ehci_readl(ehci, hostpc_reg); |
323 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
324 | t3 = ehci_readl(ehci, hostpc_reg); | |
325 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
326 | port, (t3 & HOSTPC_PHCD) ? |
327 | "succeeded" : "failed"); | |
1da177e4 | 328 | } |
3e8d6d85 | 329 | spin_unlock_irq(&ehci->lock); |
1da177e4 LT |
330 | } |
331 | ||
cd930c93 AS |
332 | /* Apparently some devices need a >= 1-uframe delay here */ |
333 | if (ehci->bus_suspended) | |
334 | udelay(150); | |
335 | ||
1da177e4 LT |
336 | /* turn off now-idle HC */ |
337 | ehci_halt (ehci); | |
c4f34764 AS |
338 | |
339 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
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; | |
e8799906 | 344 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1da177e4 | 345 | |
8df0d77d AS |
346 | unlink_empty_async_suspended(ehci); |
347 | ||
643a4df7 LL |
348 | /* Some Synopsys controllers mistakenly leave IAA turned on */ |
349 | ehci_writel(ehci, STS_IAA, &ehci->regs->status); | |
350 | ||
f96fba0d AS |
351 | /* Any IAA cycle that started before the suspend is now invalid */ |
352 | end_iaa_cycle(ehci); | |
9118f9eb | 353 | ehci_handle_start_intr_unlinks(ehci); |
df202255 | 354 | ehci_handle_intr_unlinks(ehci); |
55934eb3 | 355 | end_free_itds(ehci); |
cdc647a9 | 356 | |
8c03356a AS |
357 | /* allow remote wakeup */ |
358 | mask = INTR_MASK; | |
58a97ffe | 359 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 360 | mask &= ~STS_PCD; |
083522d7 BH |
361 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
362 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 363 | |
43fe3a99 | 364 | done: |
1da177e4 | 365 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
d58b4bcc AS |
366 | ehci->enabled_hrtimer_events = 0; |
367 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
1da177e4 | 368 | spin_unlock_irq (&ehci->lock); |
015798b2 | 369 | |
d58b4bcc | 370 | hrtimer_cancel(&ehci->hrtimer); |
1da177e4 LT |
371 | return 0; |
372 | } | |
373 | ||
374 | ||
375 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 376 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
377 | { |
378 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
379 | u32 temp; | |
383975d7 | 380 | u32 power_okay; |
1da177e4 | 381 | int i; |
d0f2fb25 | 382 | unsigned long resume_needed = 0; |
1da177e4 LT |
383 | |
384 | if (time_before (jiffies, ehci->next_statechange)) | |
385 | msleep(5); | |
386 | spin_lock_irq (&ehci->lock); | |
43fe3a99 AS |
387 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
388 | goto shutdown; | |
1da177e4 | 389 | |
ad45f1dc | 390 | if (unlikely(ehci->debug)) { |
9fa5780b | 391 | if (!dbgp_reset_prep(hcd)) |
ad45f1dc JW |
392 | ehci->debug = NULL; |
393 | else | |
9fa5780b | 394 | dbgp_external_startup(hcd); |
ad45f1dc JW |
395 | } |
396 | ||
f03c17fc DB |
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 | */ | |
383975d7 AS |
403 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
404 | ehci_dbg(ehci, "resume root hub%s\n", | |
405 | power_okay ? "" : " after power loss"); | |
f03c17fc | 406 | |
8c03356a AS |
407 | /* at least some APM implementations will try to deliver |
408 | * IRQs right away, so delay them until we're ready. | |
409 | */ | |
083522d7 | 410 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
411 | |
412 | /* re-init operational registers */ | |
083522d7 BH |
413 | ehci_writel(ehci, 0, &ehci->regs->segment); |
414 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
415 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
416 | |
417 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
3d9545cc | 418 | ehci->command |= CMD_RUN; |
083522d7 | 419 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
e8799906 | 420 | ehci->rh_state = EHCI_RH_RUNNING; |
1da177e4 | 421 | |
6273f181 PC |
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, &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(&ehci->lock); | |
434 | msleep(8); | |
435 | spin_lock_irq(&ehci->lock); | |
436 | break; | |
437 | } | |
438 | } | |
439 | ||
43fe3a99 AS |
440 | if (ehci->shutdown) |
441 | goto shutdown; | |
e198a314 | 442 | |
16032c4f | 443 | /* clear phy low-power mode before resume */ |
2cdcec4f | 444 | if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { |
16032c4f AS |
445 | i = HCS_N_PORTS(ehci->hcs_params); |
446 | while (i--) { | |
447 | if (test_bit(i, &ehci->bus_suspended)) { | |
a46af4eb AS |
448 | u32 __iomem *hostpc_reg = |
449 | &ehci->regs->hostpc[i]; | |
16032c4f | 450 | |
16032c4f AS |
451 | temp = ehci_readl(ehci, hostpc_reg); |
452 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
453 | hostpc_reg); | |
454 | } | |
455 | } | |
456 | spin_unlock_irq(&ehci->lock); | |
457 | msleep(5); | |
458 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
459 | if (ehci->shutdown) |
460 | goto shutdown; | |
16032c4f AS |
461 | } |
462 | ||
8c03356a | 463 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
464 | i = HCS_N_PORTS (ehci->hcs_params); |
465 | while (i--) { | |
083522d7 | 466 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 467 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 468 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 469 | (temp & PORT_SUSPEND)) { |
1da177e4 | 470 | temp |= PORT_RESUME; |
d0f2fb25 | 471 | set_bit(i, &resume_needed); |
3a4e72cb | 472 | } |
083522d7 | 473 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 474 | } |
3a4e72cb | 475 | |
ea16328f FB |
476 | /* |
477 | * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume | |
478 | * port | |
479 | */ | |
3a4e72cb VP |
480 | if (resume_needed) { |
481 | spin_unlock_irq(&ehci->lock); | |
ea16328f | 482 | msleep(USB_RESUME_TIMEOUT); |
3a4e72cb | 483 | spin_lock_irq(&ehci->lock); |
43fe3a99 AS |
484 | if (ehci->shutdown) |
485 | goto shutdown; | |
3a4e72cb VP |
486 | } |
487 | ||
1da177e4 | 488 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 489 | while (i--) { |
083522d7 | 490 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
d0f2fb25 | 491 | if (test_bit(i, &resume_needed)) { |
24b90814 | 492 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
083522d7 | 493 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a | 494 | } |
1da177e4 | 495 | } |
1da177e4 LT |
496 | |
497 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
c4f34764 AS |
498 | spin_unlock_irq(&ehci->lock); |
499 | ||
500 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
501 | |
502 | /* Now we can safely re-enable irqs */ | |
43fe3a99 AS |
503 | spin_lock_irq(&ehci->lock); |
504 | if (ehci->shutdown) | |
505 | goto shutdown; | |
083522d7 | 506 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
15be105b | 507 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
43fe3a99 | 508 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 509 | |
1da177e4 | 510 | return 0; |
43fe3a99 AS |
511 | |
512 | shutdown: | |
513 | spin_unlock_irq(&ehci->lock); | |
514 | return -ESHUTDOWN; | |
1da177e4 LT |
515 | } |
516 | ||
00d423c8 AS |
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 | ||
1da177e4 LT |
524 | #else |
525 | ||
0c0382e3 AS |
526 | #define ehci_bus_suspend NULL |
527 | #define ehci_bus_resume NULL | |
00d423c8 | 528 | #define ehci_get_resuming_ports NULL |
1da177e4 LT |
529 | |
530 | #endif /* CONFIG_PM */ | |
531 | ||
57e06c11 AS |
532 | /*-------------------------------------------------------------------------*/ |
533 | ||
57e06c11 | 534 | /* |
90da096e | 535 | * Sets the owner of a port |
57e06c11 | 536 | */ |
90da096e | 537 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 538 | { |
57e06c11 AS |
539 | u32 __iomem *status_reg; |
540 | u32 port_status; | |
90da096e | 541 | int try; |
57e06c11 | 542 | |
90da096e | 543 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
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 | */ | |
57e06c11 AS |
550 | for (try = 4; try > 0; --try) { |
551 | spin_lock_irq(&ehci->lock); | |
552 | port_status = ehci_readl(ehci, 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, port_status, status_reg); | |
561 | } | |
562 | spin_unlock_irq(&ehci->lock); | |
563 | if (try > 1) | |
564 | msleep(5); | |
565 | } | |
90da096e BR |
566 | } |
567 | ||
1da177e4 LT |
568 | /*-------------------------------------------------------------------------*/ |
569 | ||
570 | static int check_reset_complete ( | |
571 | struct ehci_hcd *ehci, | |
572 | int index, | |
e6316565 | 573 | u32 __iomem *status_reg, |
1da177e4 LT |
574 | int port_status |
575 | ) { | |
cd4cdc93 | 576 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 577 | return port_status; |
1da177e4 LT |
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; | |
10f6524a | 595 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 596 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 597 | |
796bcae7 VB |
598 | /* ensure 440EPX ohci controller state is operational */ |
599 | if (ehci->has_amcc_usb23) | |
600 | set_ohci_hcfs(ehci, 1); | |
601 | } else { | |
0ca7eb23 PC |
602 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
603 | index + 1); | |
796bcae7 VB |
604 | /* ensure 440EPx ohci controller state is suspended */ |
605 | if (ehci->has_amcc_usb23) | |
606 | set_ohci_hcfs(ehci, 0); | |
607 | } | |
1da177e4 LT |
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); | |
a448e4dc | 621 | u32 temp, status; |
93f1a47c | 622 | u32 mask; |
1da177e4 LT |
623 | int ports, i, retval = 1; |
624 | unsigned long flags; | |
4dd405a4 | 625 | u32 ppcd = ~0; |
1da177e4 | 626 | |
1da177e4 LT |
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 | } | |
53bd6a60 | 634 | |
a448e4dc AS |
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 | ||
93f1a47c DB |
640 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
641 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 642 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
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 | */ | |
2d5ba374 | 646 | if (!ignore_oc && !ehci->spurious_oc) |
93f1a47c DB |
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 | ||
1da177e4 LT |
652 | /* no hub change reports (bit 0) for now (power, ...) */ |
653 | ||
654 | /* port N changes (bit N)? */ | |
655 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
656 | |
657 | /* get per-port change detect bits */ | |
658 | if (ehci->has_ppcd) | |
659 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
660 | ||
1da177e4 | 661 | for (i = 0; i < ports; i++) { |
5a9cdf33 | 662 | /* leverage per-port change bits feature */ |
4dd405a4 AS |
663 | if (ppcd & (1 << i)) |
664 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
665 | else | |
666 | temp = 0; | |
625b5c9a AS |
667 | |
668 | /* | |
669 | * Return status information even for ports with OWNER set. | |
37ebb549 | 670 | * Otherwise hub_wq wouldn't see the disconnect event when a |
625b5c9a AS |
671 | * high-speed device is switched over to the companion |
672 | * controller by the user. | |
673 | */ | |
674 | ||
eafe5b99 AS |
675 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
676 | || (ehci->reset_done[i] && time_after_eq( | |
dda4b60e XY |
677 | jiffies, ehci->reset_done[i])) |
678 | || ehci_has_ci_pec_bug(ehci, temp)) { | |
1da177e4 LT |
679 | if (i < 7) |
680 | buf [0] |= 1 << (i + 1); | |
681 | else | |
682 | buf [1] |= 1 << (i - 7); | |
683 | status = STS_PCD; | |
684 | } | |
685 | } | |
ee74290b AS |
686 | |
687 | /* If a resume is in progress, make sure it can finish */ | |
688 | if (ehci->resuming_ports) | |
689 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); | |
690 | ||
1da177e4 LT |
691 | spin_unlock_irqrestore (&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 | ||
625a4c59 | 705 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 LT |
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 */ | |
dbe79bbe JY |
714 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
715 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 | 716 | |
3a2359ee | 717 | temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ |
1da177e4 | 718 | if (HCS_PPC (ehci->hcs_params)) |
3a2359ee | 719 | temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ |
56c1e26d | 720 | else |
3a2359ee | 721 | temp |= HUB_CHAR_NO_LPSM; /* no power switching */ |
1da177e4 LT |
722 | #if 0 |
723 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
724 | if (HCS_INDICATOR (ehci->hcs_params)) | |
3a2359ee | 725 | temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ |
1da177e4 | 726 | #endif |
fd05e720 | 727 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
728 | } |
729 | ||
730 | /*-------------------------------------------------------------------------*/ | |
731 | ||
37769939 | 732 | int ehci_hub_control( |
1da177e4 LT |
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); | |
85e3990b | 742 | u32 __iomem *status_reg, *hostpc_reg; |
331ac6b2 | 743 | u32 temp, temp1, status; |
1da177e4 LT |
744 | unsigned long flags; |
745 | int retval = 0; | |
f0d7f273 | 746 | unsigned selector; |
1da177e4 | 747 | |
85e3990b | 748 | /* |
846cbf98 AS |
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. | |
85e3990b | 752 | */ |
846cbf98 AS |
753 | temp = (wIndex - 1) & 0xff; |
754 | if (temp >= HCS_N_PORTS_MAX) | |
755 | temp = 0; | |
85e3990b AS |
756 | status_reg = &ehci->regs->port_status[temp]; |
757 | hostpc_reg = &ehci->regs->hostpc[temp]; | |
758 | ||
1da177e4 LT |
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--; | |
e6316565 | 782 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 783 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
784 | |
785 | /* | |
786 | * Even if OWNER is set, so the port is owned by the | |
37ebb549 | 787 | * companion controller, hub_wq needs to be able to clear |
625b5c9a | 788 | * the port-change status bits (especially |
749da5f8 | 789 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 790 | */ |
1da177e4 LT |
791 | |
792 | switch (wValue) { | |
793 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 794 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
795 | break; |
796 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 797 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
798 | break; |
799 | case USB_PORT_FEAT_SUSPEND: | |
800 | if (temp & PORT_RESET) | |
801 | goto error; | |
f8aeb3bb DB |
802 | if (ehci->no_selective_suspend) |
803 | break; | |
83722bc9 AG |
804 | #ifdef CONFIG_USB_OTG |
805 | if ((hcd->self.otg_port == (wIndex + 1)) | |
806 | && hcd->self.b_hnp_enable) { | |
3d46e73d | 807 | otg_start_hnp(hcd->usb_phy->otg); |
83722bc9 AG |
808 | break; |
809 | } | |
810 | #endif | |
16032c4f AS |
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 */ | |
2cdcec4f | 817 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
818 | temp1 = ehci_readl(ehci, hostpc_reg); |
819 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 820 | hostpc_reg); |
16032c4f AS |
821 | spin_unlock_irqrestore(&ehci->lock, flags); |
822 | msleep(5);/* wait to leave low-power mode */ | |
823 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 824 | } |
16032c4f | 825 | /* resume signaling for 20 msec */ |
6d5f89c7 | 826 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
827 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
828 | ehci->reset_done[wIndex] = jiffies | |
ea16328f | 829 | + msecs_to_jiffies(USB_RESUME_TIMEOUT); |
3a20446f AS |
830 | set_bit(wIndex, &ehci->resuming_ports); |
831 | usb_hcd_start_port_resume(&hcd->self, wIndex); | |
1da177e4 LT |
832 | break; |
833 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 834 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
835 | break; |
836 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
837 | if (HCS_PPC(ehci->hcs_params)) { |
838 | spin_unlock_irqrestore(&ehci->lock, flags); | |
839 | ehci_port_power(ehci, wIndex, false); | |
840 | spin_lock_irqsave(&ehci->lock, flags); | |
841 | } | |
1da177e4 LT |
842 | break; |
843 | case USB_PORT_FEAT_C_CONNECTION: | |
6d5f89c7 | 844 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
845 | break; |
846 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 847 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
848 | break; |
849 | case USB_PORT_FEAT_C_RESET: | |
850 | /* GetPortStatus clears reset */ | |
851 | break; | |
852 | default: | |
853 | goto error; | |
854 | } | |
083522d7 | 855 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
856 | break; |
857 | case GetHubDescriptor: | |
858 | ehci_hub_descriptor (ehci, (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; | |
e6316565 | 871 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
872 | |
873 | // wPortChange bits | |
874 | if (temp & PORT_CSC) | |
749da5f8 | 875 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 876 | if (temp & PORT_PEC) |
749da5f8 | 877 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 | 878 | |
dda4b60e XY |
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 | ||
2d5ba374 | 886 | if ((temp & PORT_OCC) && (!ignore_oc && !ehci->spurious_oc)){ |
749da5f8 | 887 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 888 | |
756aa6b3 CE |
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 | |
37ebb549 | 894 | * current. hub_wq will turn the power back on. |
756aa6b3 | 895 | */ |
e6604a7f CE |
896 | if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
897 | && HCS_PPC(ehci->hcs_params)) { | |
11a7e594 MG |
898 | spin_unlock_irqrestore(&ehci->lock, flags); |
899 | ehci_port_power(ehci, wIndex, false); | |
900 | spin_lock_irqsave(&ehci->lock, flags); | |
81463c1d | 901 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
902 | } |
903 | } | |
904 | ||
6753f4cf AS |
905 | /* no reset or resume pending */ |
906 | if (!ehci->reset_done[wIndex]) { | |
629e4427 AS |
907 | |
908 | /* Remote Wakeup received? */ | |
6753f4cf | 909 | if (temp & PORT_RESUME) { |
629e4427 AS |
910 | /* resume signaling for 20 msec */ |
911 | ehci->reset_done[wIndex] = jiffies | |
912 | + msecs_to_jiffies(20); | |
f292e7f9 | 913 | usb_hcd_start_port_resume(&hcd->self, wIndex); |
47a64a13 | 914 | set_bit(wIndex, &ehci->resuming_ports); |
629e4427 AS |
915 | /* check the port again */ |
916 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
917 | ehci->reset_done[wIndex]); | |
918 | } | |
1da177e4 | 919 | |
6753f4cf AS |
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(wIndex, &ehci->suspended_ports); | |
927 | set_bit(wIndex, &ehci->port_c_suspend); | |
928 | ehci->reset_done[wIndex] = 0; | |
929 | usb_hcd_end_port_resume(&hcd->self, wIndex); | |
930 | ||
931 | /* stop resume signaling */ | |
932 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); | |
933 | ehci_writel(ehci, temp, status_reg); | |
934 | clear_bit(wIndex, &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", | |
629e4427 | 939 | wIndex + 1, retval); |
6753f4cf | 940 | goto error; |
1da177e4 | 941 | } |
6753f4cf | 942 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
943 | |
944 | /* whoever resets must GetPortStatus to complete it!! */ | |
6753f4cf | 945 | } else { |
749da5f8 | 946 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 LT |
947 | ehci->reset_done [wIndex] = 0; |
948 | ||
949 | /* force reset to complete */ | |
083522d7 | 950 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 951 | status_reg); |
c22fa3ac DB |
952 | /* REVISIT: some hardware needs 550+ usec to clear |
953 | * this bit; seems too long to spin routinely... | |
954 | */ | |
2f3a6b86 | 955 | retval = ehci_handshake(ehci, status_reg, |
6307e096 | 956 | PORT_RESET, 0, 1000); |
1da177e4 LT |
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 */ | |
e6316565 AS |
964 | temp = check_reset_complete (ehci, wIndex, status_reg, |
965 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
966 | } |
967 | ||
57e06c11 AS |
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, temp, status_reg); | |
974 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
975 | temp = ehci_readl(ehci, status_reg); | |
976 | } | |
977 | ||
625b5c9a | 978 | /* |
37ebb549 | 979 | * Even if OWNER is set, there's no harm letting hub_wq |
625b5c9a AS |
980 | * see the wPortStatus values (they should all be 0 except |
981 | * for PORT_POWER anyway). | |
982 | */ | |
983 | ||
984 | if (temp & PORT_CONNECT) { | |
749da5f8 | 985 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 986 | // status may be from integrated TT |
331ac6b2 AD |
987 | if (ehci->has_hostpc) { |
988 | temp1 = ehci_readl(ehci, hostpc_reg); | |
989 | status |= ehci_port_speed(ehci, temp1); | |
990 | } else | |
991 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 992 | } |
625b5c9a | 993 | if (temp & PORT_PE) |
749da5f8 | 994 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
995 | |
996 | /* maybe the port was unsuspended without our knowledge */ | |
997 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 998 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
999 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
1000 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 1001 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
1002 | ehci->reset_done[wIndex] = 0; |
1003 | if (temp & PORT_PE) | |
1004 | set_bit(wIndex, &ehci->port_c_suspend); | |
f292e7f9 | 1005 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
eafe5b99 AS |
1006 | } |
1007 | ||
625b5c9a | 1008 | if (temp & PORT_OC) |
749da5f8 | 1009 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 1010 | if (temp & PORT_RESET) |
749da5f8 | 1011 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 1012 | if (temp & PORT_POWER) |
749da5f8 | 1013 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 1014 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 1015 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 1016 | |
bbcd5cab ON |
1017 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
1018 | dbg_port(ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 1019 | put_unaligned_le32(status, buf); |
1da177e4 LT |
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: | |
f0d7f273 DB |
1032 | selector = wIndex >> 8; |
1033 | wIndex &= 0xff; | |
8d053c79 JW |
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(&ehci->debug->control) & DBGP_ENABLED)) { | |
1039 | retval = -ENODEV; | |
1040 | goto error_exit; | |
1041 | } | |
1042 | } | |
1da177e4 LT |
1043 | if (!wIndex || wIndex > ports) |
1044 | goto error; | |
1045 | wIndex--; | |
e6316565 | 1046 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1047 | if (temp & PORT_OWNER) |
1048 | break; | |
1049 | ||
10f6524a | 1050 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1051 | switch (wValue) { |
1052 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1053 | if (ehci->no_selective_suspend) |
1054 | break; | |
1da177e4 LT |
1055 | if ((temp & PORT_PE) == 0 |
1056 | || (temp & PORT_RESET) != 0) | |
1057 | goto error; | |
b9df7942 | 1058 | |
331ac6b2 AD |
1059 | /* After above check the port must be connected. |
1060 | * Set appropriate bit thus could put phy into low power | |
2cdcec4f | 1061 | * mode if we have tdi_phy_lpm feature |
331ac6b2 | 1062 | */ |
b9df7942 AD |
1063 | temp &= ~PORT_WKCONN_E; |
1064 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1065 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
2cdcec4f | 1066 | if (ehci->has_tdi_phy_lpm) { |
b9df7942 | 1067 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1068 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1069 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1070 | temp1 = ehci_readl(ehci, hostpc_reg); |
1071 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1072 | hostpc_reg); | |
1073 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1074 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1075 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1076 | "succeeded" : "failed"); | |
1077 | } | |
9d4b8270 CH |
1078 | if (ehci_has_fsl_susp_errata(ehci)) { |
1079 | /* 10ms for HCD enter suspend */ | |
1080 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1081 | usleep_range(10000, 20000); | |
1082 | spin_lock_irqsave(&ehci->lock, flags); | |
1083 | } | |
eafe5b99 | 1084 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1085 | break; |
1086 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
1087 | if (HCS_PPC(ehci->hcs_params)) { |
1088 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1089 | ehci_port_power(ehci, wIndex, true); | |
1090 | spin_lock_irqsave(&ehci->lock, flags); | |
1091 | } | |
1da177e4 LT |
1092 | break; |
1093 | case USB_PORT_FEAT_RESET: | |
6753f4cf | 1094 | if (temp & (PORT_SUSPEND|PORT_RESUME)) |
1da177e4 LT |
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 { | |
1da177e4 LT |
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 (50); | |
f8786a91 NB |
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); | |
1da177e4 | 1124 | } |
e6316565 | 1125 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1126 | break; |
f0d7f273 DB |
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: | |
726a85ca | 1135 | #ifdef CONFIG_USB_HCD_TEST_MODE |
9841f37a MG |
1136 | if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
1137 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1138 | retval = ehset_single_step_set_feature(hcd, | |
5cbcc35e | 1139 | wIndex + 1); |
9841f37a MG |
1140 | spin_lock_irqsave(&ehci->lock, flags); |
1141 | break; | |
726a85ca JP |
1142 | } |
1143 | #endif | |
1144 | if (!selector || selector > 5) | |
f0d7f273 | 1145 | goto error; |
c4f34764 | 1146 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1147 | ehci_quiesce(ehci); |
c4f34764 | 1148 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
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, sreg) & ~PORT_RWC_BITS; | |
1156 | if (temp & PORT_PE) | |
1157 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1158 | sreg); | |
1159 | } | |
c4f34764 AS |
1160 | |
1161 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1162 | ehci_halt(ehci); |
c4f34764 AS |
1163 | spin_lock_irqsave(&ehci->lock, flags); |
1164 | ||
77636c86 | 1165 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1166 | temp |= selector << 16; |
e6316565 | 1167 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1168 | break; |
1169 | ||
1da177e4 LT |
1170 | default: |
1171 | goto error; | |
1172 | } | |
083522d7 | 1173 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1174 | break; |
1175 | ||
1176 | default: | |
1177 | error: | |
1178 | /* "stall" on error */ | |
1179 | retval = -EPIPE; | |
1180 | } | |
8d053c79 | 1181 | error_exit: |
1da177e4 LT |
1182 | spin_unlock_irqrestore (&ehci->lock, flags); |
1183 | return retval; | |
1184 | } | |
37769939 | 1185 | EXPORT_SYMBOL_GPL(ehci_hub_control); |
90da096e | 1186 | |
3e023203 | 1187 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
90da096e BR |
1188 | { |
1189 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1190 | ||
1191 | if (ehci_is_TDI(ehci)) | |
1192 | return; | |
1193 | set_owner(ehci, --portnum, PORT_OWNER); | |
1194 | } | |
1195 | ||
3e023203 | 1196 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
3a31155c AS |
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, reg) & PORT_OWNER; | |
1205 | } | |
11a7e594 MG |
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, status_reg) & ~PORT_RWC_BITS; | |
1212 | ||
1213 | if (enable) | |
1214 | ehci_writel(ehci, temp | PORT_POWER, status_reg); | |
1215 | else | |
1216 | ehci_writel(ehci, temp & ~PORT_POWER, status_reg); | |
1217 | ||
1218 | if (hcd->driver->port_power) | |
1219 | hcd->driver->port_power(hcd, portnum, enable); | |
1220 | ||
1221 | return 0; | |
1222 | } |