Commit | Line | Data |
---|---|---|
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 | /*-------------------------------------------------------------------------*/ | |
83722bc9 | 30 | #include <linux/usb/otg.h> |
1da177e4 | 31 | |
58a97ffe AS |
32 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
33 | ||
aff6d18f AS |
34 | #ifdef CONFIG_PM |
35 | ||
383975d7 AS |
36 | static int ehci_hub_control( |
37 | struct usb_hcd *hcd, | |
38 | u16 typeReq, | |
39 | u16 wValue, | |
40 | u16 wIndex, | |
41 | char *buf, | |
42 | u16 wLength | |
43 | ); | |
44 | ||
9b790915 JW |
45 | static int persist_enabled_on_companion(struct usb_device *udev, void *unused) |
46 | { | |
47 | return !udev->maxchild && udev->persist_enabled && | |
48 | udev->bus->root_hub->speed < USB_SPEED_HIGH; | |
49 | } | |
50 | ||
383975d7 AS |
51 | /* After a power loss, ports that were owned by the companion must be |
52 | * reset so that the companion can still own them. | |
53 | */ | |
54 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
55 | { | |
56 | u32 __iomem *reg; | |
57 | u32 status; | |
58 | int port; | |
59 | __le32 buf; | |
60 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
61 | ||
62 | if (!ehci->owned_ports) | |
63 | return; | |
64 | ||
9b790915 JW |
65 | /* |
66 | * USB 1.1 devices are mostly HIDs, which don't need to persist across | |
67 | * suspends. If we ensure that none of our companion's devices have | |
68 | * persist_enabled (by looking through all USB 1.1 buses in the system), | |
69 | * we can skip this and avoid slowing resume down. Devices without | |
70 | * persist will just get reenumerated shortly after resume anyway. | |
71 | */ | |
72 | if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) | |
73 | return; | |
74 | ||
c73cee71 AS |
75 | /* Make sure the ports are powered */ |
76 | port = HCS_N_PORTS(ehci->hcs_params); | |
77 | while (port--) { | |
78 | if (test_bit(port, &ehci->owned_ports)) { | |
79 | reg = &ehci->regs->port_status[port]; | |
80 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
81 | if (!(status & PORT_POWER)) { | |
82 | status |= PORT_POWER; | |
83 | ehci_writel(ehci, status, reg); | |
84 | } | |
85 | } | |
86 | } | |
87 | ||
383975d7 AS |
88 | /* Give the connections some time to appear */ |
89 | msleep(20); | |
90 | ||
c4f34764 | 91 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
92 | port = HCS_N_PORTS(ehci->hcs_params); |
93 | while (port--) { | |
94 | if (test_bit(port, &ehci->owned_ports)) { | |
95 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 96 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
97 | |
98 | /* Port already owned by companion? */ | |
99 | if (status & PORT_OWNER) | |
100 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
101 | else if (test_bit(port, &ehci->companion_ports)) |
102 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
c4f34764 AS |
103 | else { |
104 | spin_unlock_irq(&ehci->lock); | |
383975d7 AS |
105 | ehci_hub_control(hcd, SetPortFeature, |
106 | USB_PORT_FEAT_RESET, port + 1, | |
107 | NULL, 0); | |
c4f34764 AS |
108 | spin_lock_irq(&ehci->lock); |
109 | } | |
383975d7 AS |
110 | } |
111 | } | |
c4f34764 | 112 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
113 | |
114 | if (!ehci->owned_ports) | |
115 | return; | |
116 | msleep(90); /* Wait for resets to complete */ | |
117 | ||
c4f34764 | 118 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
119 | port = HCS_N_PORTS(ehci->hcs_params); |
120 | while (port--) { | |
121 | if (test_bit(port, &ehci->owned_ports)) { | |
c4f34764 | 122 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
123 | ehci_hub_control(hcd, GetPortStatus, |
124 | 0, port + 1, | |
125 | (char *) &buf, sizeof(buf)); | |
c4f34764 | 126 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
127 | |
128 | /* The companion should now own the port, | |
129 | * but if something went wrong the port must not | |
130 | * remain enabled. | |
131 | */ | |
132 | reg = &ehci->regs->port_status[port]; | |
133 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
134 | if (status & PORT_OWNER) | |
135 | ehci_writel(ehci, status | PORT_CSC, reg); | |
136 | else { | |
137 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
138 | port + 1, status); | |
139 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
140 | } | |
141 | } | |
142 | } | |
143 | ||
144 | ehci->owned_ports = 0; | |
c4f34764 | 145 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
146 | } |
147 | ||
c5cf9212 | 148 | static int ehci_port_change(struct ehci_hcd *ehci) |
294d95f2 MG |
149 | { |
150 | int i = HCS_N_PORTS(ehci->hcs_params); | |
151 | ||
152 | /* First check if the controller indicates a change event */ | |
153 | ||
154 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) | |
155 | return 1; | |
156 | ||
157 | /* | |
158 | * Not all controllers appear to update this while going from D3 to D0, | |
159 | * so check the individual port status registers as well | |
160 | */ | |
161 | ||
162 | while (i--) | |
163 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) | |
164 | return 1; | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
c5cf9212 | 169 | static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 170 | bool suspending, bool do_wakeup) |
16032c4f AS |
171 | { |
172 | int port; | |
173 | u32 temp; | |
174 | ||
175 | /* If remote wakeup is enabled for the root hub but disabled | |
176 | * for the controller, we must adjust all the port wakeup flags | |
177 | * when the controller is suspended or resumed. In all other | |
178 | * cases they don't need to be changed. | |
179 | */ | |
4147200d | 180 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
181 | return; |
182 | ||
c4f34764 | 183 | spin_lock_irq(&ehci->lock); |
148fc55f | 184 | |
16032c4f AS |
185 | /* clear phy low-power mode before changing wakeup flags */ |
186 | if (ehci->has_hostpc) { | |
187 | port = HCS_N_PORTS(ehci->hcs_params); | |
188 | while (port--) { | |
a46af4eb | 189 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 190 | |
16032c4f AS |
191 | temp = ehci_readl(ehci, hostpc_reg); |
192 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
193 | } | |
c4f34764 | 194 | spin_unlock_irq(&ehci->lock); |
16032c4f | 195 | msleep(5); |
c4f34764 | 196 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
197 | } |
198 | ||
199 | port = HCS_N_PORTS(ehci->hcs_params); | |
200 | while (port--) { | |
201 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
202 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
203 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
204 | ||
205 | /* If we are suspending the controller, clear the flags. | |
206 | * If we are resuming the controller, set the wakeup flags. | |
207 | */ | |
208 | if (!suspending) { | |
209 | if (t1 & PORT_CONNECT) | |
210 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
211 | else | |
212 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
213 | } | |
214 | ehci_vdbg(ehci, "port %d, %08x -> %08x\n", | |
215 | port + 1, t1, t2); | |
216 | ehci_writel(ehci, t2, reg); | |
217 | } | |
218 | ||
219 | /* enter phy low-power mode again */ | |
220 | if (ehci->has_hostpc) { | |
221 | port = HCS_N_PORTS(ehci->hcs_params); | |
222 | while (port--) { | |
a46af4eb | 223 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 224 | |
16032c4f AS |
225 | temp = ehci_readl(ehci, hostpc_reg); |
226 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
227 | } | |
228 | } | |
ee0b9be8 AS |
229 | |
230 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 231 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 232 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f | 233 | |
c4f34764 | 234 | spin_unlock_irq(&ehci->lock); |
16032c4f AS |
235 | } |
236 | ||
0c0382e3 | 237 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
238 | { |
239 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
240 | int port; | |
8c03356a | 241 | int mask; |
16032c4f | 242 | int changed; |
1da177e4 | 243 | |
8c774fe8 AS |
244 | ehci_dbg(ehci, "suspend root hub\n"); |
245 | ||
1da177e4 LT |
246 | if (time_before (jiffies, ehci->next_statechange)) |
247 | msleep(5); | |
248 | ||
c4f34764 AS |
249 | /* stop the schedules */ |
250 | ehci_quiesce(ehci); | |
251 | ||
1da177e4 | 252 | spin_lock_irq (&ehci->lock); |
43fe3a99 AS |
253 | if (ehci->rh_state < EHCI_RH_RUNNING) |
254 | goto done; | |
1da177e4 | 255 | |
cec3a53c AS |
256 | /* Once the controller is stopped, port resumes that are already |
257 | * in progress won't complete. Hence if remote wakeup is enabled | |
258 | * for the root hub and any ports are in the middle of a resume or | |
259 | * remote wakeup, we must fail the suspend. | |
260 | */ | |
261 | if (hcd->self.root_hub->do_remote_wakeup) { | |
a448e4dc AS |
262 | if (ehci->resuming_ports) { |
263 | spin_unlock_irq(&ehci->lock); | |
264 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); | |
265 | return -EBUSY; | |
cec3a53c AS |
266 | } |
267 | } | |
268 | ||
8c03356a AS |
269 | /* Unlike other USB host controller types, EHCI doesn't have |
270 | * any notion of "global" or bus-wide suspend. The driver has | |
271 | * to manually suspend all the active unsuspended ports, and | |
272 | * then manually resume them in the bus_resume() routine. | |
273 | */ | |
274 | ehci->bus_suspended = 0; | |
383975d7 | 275 | ehci->owned_ports = 0; |
16032c4f | 276 | changed = 0; |
cec3a53c | 277 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
278 | while (port--) { |
279 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 280 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 281 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 282 | |
8c03356a | 283 | /* keep track of which ports we suspend */ |
383975d7 AS |
284 | if (t1 & PORT_OWNER) |
285 | set_bit(port, &ehci->owned_ports); | |
286 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 287 | t2 |= PORT_SUSPEND; |
8c03356a AS |
288 | set_bit(port, &ehci->bus_suspended); |
289 | } | |
290 | ||
16032c4f | 291 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
292 | if (hcd->self.root_hub->do_remote_wakeup) { |
293 | /* only enable appropriate wake bits, otherwise the | |
294 | * hardware can not go phy low power mode. If a race | |
295 | * condition happens here(connection change during bits | |
296 | * set), the port change detection will finally fix it. | |
297 | */ | |
16032c4f | 298 | if (t1 & PORT_CONNECT) |
331ac6b2 | 299 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 300 | else |
331ac6b2 | 301 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 302 | } |
1da177e4 LT |
303 | |
304 | if (t1 != t2) { | |
305 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
306 | port + 1, t1, t2); | |
083522d7 | 307 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
308 | changed = 1; |
309 | } | |
310 | } | |
331ac6b2 | 311 | |
16032c4f AS |
312 | if (changed && ehci->has_hostpc) { |
313 | spin_unlock_irq(&ehci->lock); | |
314 | msleep(5); /* 5 ms for HCD to enter low-power mode */ | |
315 | spin_lock_irq(&ehci->lock); | |
316 | ||
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 LT |
328 | } |
329 | } | |
c4f34764 | 330 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 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 | |
3c273a05 | 346 | end_unlink_async(ehci); |
2a40f324 | 347 | unlink_empty_async_suspended(ehci); |
df202255 | 348 | ehci_handle_intr_unlinks(ehci); |
55934eb3 | 349 | end_free_itds(ehci); |
cdc647a9 | 350 | |
8c03356a AS |
351 | /* allow remote wakeup */ |
352 | mask = INTR_MASK; | |
58a97ffe | 353 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 354 | mask &= ~STS_PCD; |
083522d7 BH |
355 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
356 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 357 | |
43fe3a99 | 358 | done: |
1da177e4 | 359 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
d58b4bcc AS |
360 | ehci->enabled_hrtimer_events = 0; |
361 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
1da177e4 | 362 | spin_unlock_irq (&ehci->lock); |
015798b2 | 363 | |
d58b4bcc | 364 | hrtimer_cancel(&ehci->hrtimer); |
1da177e4 LT |
365 | return 0; |
366 | } | |
367 | ||
368 | ||
369 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 370 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
371 | { |
372 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
373 | u32 temp; | |
383975d7 | 374 | u32 power_okay; |
1da177e4 | 375 | int i; |
d0f2fb25 | 376 | unsigned long resume_needed = 0; |
1da177e4 LT |
377 | |
378 | if (time_before (jiffies, ehci->next_statechange)) | |
379 | msleep(5); | |
380 | spin_lock_irq (&ehci->lock); | |
43fe3a99 AS |
381 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
382 | goto shutdown; | |
1da177e4 | 383 | |
ad45f1dc | 384 | if (unlikely(ehci->debug)) { |
9fa5780b | 385 | if (!dbgp_reset_prep(hcd)) |
ad45f1dc JW |
386 | ehci->debug = NULL; |
387 | else | |
9fa5780b | 388 | dbgp_external_startup(hcd); |
ad45f1dc JW |
389 | } |
390 | ||
f03c17fc DB |
391 | /* Ideally and we've got a real resume here, and no port's power |
392 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
393 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
394 | * the last user of the controller, not reset/pm hardware keeping | |
395 | * state we gave to it. | |
396 | */ | |
383975d7 AS |
397 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
398 | ehci_dbg(ehci, "resume root hub%s\n", | |
399 | power_okay ? "" : " after power loss"); | |
f03c17fc | 400 | |
8c03356a AS |
401 | /* at least some APM implementations will try to deliver |
402 | * IRQs right away, so delay them until we're ready. | |
403 | */ | |
083522d7 | 404 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
405 | |
406 | /* re-init operational registers */ | |
083522d7 BH |
407 | ehci_writel(ehci, 0, &ehci->regs->segment); |
408 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
409 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
410 | |
411 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
3d9545cc | 412 | ehci->command |= CMD_RUN; |
083522d7 | 413 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
e8799906 | 414 | ehci->rh_state = EHCI_RH_RUNNING; |
1da177e4 | 415 | |
6273f181 PC |
416 | /* |
417 | * According to Bugzilla #8190, the port status for some controllers | |
418 | * will be wrong without a delay. At their wrong status, the port | |
419 | * is enabled, but not suspended neither resumed. | |
420 | */ | |
421 | i = HCS_N_PORTS(ehci->hcs_params); | |
422 | while (i--) { | |
423 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
424 | if ((temp & PORT_PE) && | |
425 | !(temp & (PORT_SUSPEND | PORT_RESUME))) { | |
426 | ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); | |
427 | spin_unlock_irq(&ehci->lock); | |
428 | msleep(8); | |
429 | spin_lock_irq(&ehci->lock); | |
430 | break; | |
431 | } | |
432 | } | |
433 | ||
43fe3a99 AS |
434 | if (ehci->shutdown) |
435 | goto shutdown; | |
e198a314 | 436 | |
16032c4f AS |
437 | /* clear phy low-power mode before resume */ |
438 | if (ehci->bus_suspended && ehci->has_hostpc) { | |
439 | i = HCS_N_PORTS(ehci->hcs_params); | |
440 | while (i--) { | |
441 | if (test_bit(i, &ehci->bus_suspended)) { | |
a46af4eb AS |
442 | u32 __iomem *hostpc_reg = |
443 | &ehci->regs->hostpc[i]; | |
16032c4f | 444 | |
16032c4f AS |
445 | temp = ehci_readl(ehci, hostpc_reg); |
446 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
447 | hostpc_reg); | |
448 | } | |
449 | } | |
450 | spin_unlock_irq(&ehci->lock); | |
451 | msleep(5); | |
452 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
453 | if (ehci->shutdown) |
454 | goto shutdown; | |
16032c4f AS |
455 | } |
456 | ||
8c03356a | 457 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
458 | i = HCS_N_PORTS (ehci->hcs_params); |
459 | while (i--) { | |
083522d7 | 460 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 461 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 462 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 463 | (temp & PORT_SUSPEND)) { |
1da177e4 | 464 | temp |= PORT_RESUME; |
d0f2fb25 | 465 | set_bit(i, &resume_needed); |
3a4e72cb | 466 | } |
083522d7 | 467 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 468 | } |
3a4e72cb VP |
469 | |
470 | /* msleep for 20ms only if code is trying to resume port */ | |
471 | if (resume_needed) { | |
472 | spin_unlock_irq(&ehci->lock); | |
473 | msleep(20); | |
474 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
475 | if (ehci->shutdown) |
476 | goto shutdown; | |
3a4e72cb VP |
477 | } |
478 | ||
1da177e4 | 479 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 480 | while (i--) { |
083522d7 | 481 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
d0f2fb25 | 482 | if (test_bit(i, &resume_needed)) { |
24b90814 | 483 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
083522d7 | 484 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
485 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
486 | } | |
1da177e4 | 487 | } |
1da177e4 LT |
488 | |
489 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
c4f34764 AS |
490 | spin_unlock_irq(&ehci->lock); |
491 | ||
492 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
493 | |
494 | /* Now we can safely re-enable irqs */ | |
43fe3a99 AS |
495 | spin_lock_irq(&ehci->lock); |
496 | if (ehci->shutdown) | |
497 | goto shutdown; | |
083522d7 | 498 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
15be105b | 499 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
43fe3a99 | 500 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 501 | |
1da177e4 | 502 | return 0; |
43fe3a99 AS |
503 | |
504 | shutdown: | |
505 | spin_unlock_irq(&ehci->lock); | |
506 | return -ESHUTDOWN; | |
1da177e4 LT |
507 | } |
508 | ||
509 | #else | |
510 | ||
0c0382e3 AS |
511 | #define ehci_bus_suspend NULL |
512 | #define ehci_bus_resume NULL | |
1da177e4 LT |
513 | |
514 | #endif /* CONFIG_PM */ | |
515 | ||
57e06c11 AS |
516 | /*-------------------------------------------------------------------------*/ |
517 | ||
57e06c11 | 518 | /* |
90da096e | 519 | * Sets the owner of a port |
57e06c11 | 520 | */ |
90da096e | 521 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 522 | { |
57e06c11 AS |
523 | u32 __iomem *status_reg; |
524 | u32 port_status; | |
90da096e | 525 | int try; |
57e06c11 | 526 | |
90da096e | 527 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
528 | |
529 | /* | |
530 | * The controller won't set the OWNER bit if the port is | |
531 | * enabled, so this loop will sometimes require at least two | |
532 | * iterations: one to disable the port and one to set OWNER. | |
533 | */ | |
57e06c11 AS |
534 | for (try = 4; try > 0; --try) { |
535 | spin_lock_irq(&ehci->lock); | |
536 | port_status = ehci_readl(ehci, status_reg); | |
537 | if ((port_status & PORT_OWNER) == new_owner | |
538 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
539 | == 0) | |
540 | try = 0; | |
541 | else { | |
542 | port_status ^= PORT_OWNER; | |
543 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
544 | ehci_writel(ehci, port_status, status_reg); | |
545 | } | |
546 | spin_unlock_irq(&ehci->lock); | |
547 | if (try > 1) | |
548 | msleep(5); | |
549 | } | |
90da096e BR |
550 | } |
551 | ||
1da177e4 LT |
552 | /*-------------------------------------------------------------------------*/ |
553 | ||
554 | static int check_reset_complete ( | |
555 | struct ehci_hcd *ehci, | |
556 | int index, | |
e6316565 | 557 | u32 __iomem *status_reg, |
1da177e4 LT |
558 | int port_status |
559 | ) { | |
cd4cdc93 | 560 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 561 | return port_status; |
1da177e4 LT |
562 | |
563 | /* if reset finished and it's still not enabled -- handoff */ | |
564 | if (!(port_status & PORT_PE)) { | |
565 | ||
566 | /* with integrated TT, there's nobody to hand it to! */ | |
567 | if (ehci_is_TDI(ehci)) { | |
568 | ehci_dbg (ehci, | |
569 | "Failed to enable port %d on root hub TT\n", | |
570 | index+1); | |
571 | return port_status; | |
572 | } | |
573 | ||
574 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
575 | index + 1); | |
576 | ||
577 | // what happens if HCS_N_CC(params) == 0 ? | |
578 | port_status |= PORT_OWNER; | |
10f6524a | 579 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 580 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 581 | |
796bcae7 VB |
582 | /* ensure 440EPX ohci controller state is operational */ |
583 | if (ehci->has_amcc_usb23) | |
584 | set_ohci_hcfs(ehci, 1); | |
585 | } else { | |
0ca7eb23 PC |
586 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
587 | index + 1); | |
796bcae7 VB |
588 | /* ensure 440EPx ohci controller state is suspended */ |
589 | if (ehci->has_amcc_usb23) | |
590 | set_ohci_hcfs(ehci, 0); | |
591 | } | |
1da177e4 LT |
592 | |
593 | return port_status; | |
594 | } | |
595 | ||
596 | /*-------------------------------------------------------------------------*/ | |
597 | ||
598 | ||
599 | /* build "status change" packet (one or two bytes) from HC registers */ | |
600 | ||
601 | static int | |
602 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
603 | { | |
604 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
a448e4dc | 605 | u32 temp, status; |
93f1a47c | 606 | u32 mask; |
1da177e4 LT |
607 | int ports, i, retval = 1; |
608 | unsigned long flags; | |
4dd405a4 | 609 | u32 ppcd = ~0; |
1da177e4 | 610 | |
1da177e4 LT |
611 | /* init status to no-changes */ |
612 | buf [0] = 0; | |
613 | ports = HCS_N_PORTS (ehci->hcs_params); | |
614 | if (ports > 7) { | |
615 | buf [1] = 0; | |
616 | retval++; | |
617 | } | |
53bd6a60 | 618 | |
a448e4dc AS |
619 | /* Inform the core about resumes-in-progress by returning |
620 | * a non-zero value even if there are no status changes. | |
621 | */ | |
622 | status = ehci->resuming_ports; | |
623 | ||
93f1a47c DB |
624 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
625 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 626 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
627 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
628 | * PORT_POWER; that's surprising, but maybe within-spec. | |
629 | */ | |
630 | if (!ignore_oc) | |
631 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
632 | else | |
633 | mask = PORT_CSC | PORT_PEC; | |
634 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
635 | ||
1da177e4 LT |
636 | /* no hub change reports (bit 0) for now (power, ...) */ |
637 | ||
638 | /* port N changes (bit N)? */ | |
639 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
640 | |
641 | /* get per-port change detect bits */ | |
642 | if (ehci->has_ppcd) | |
643 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
644 | ||
1da177e4 | 645 | for (i = 0; i < ports; i++) { |
5a9cdf33 | 646 | /* leverage per-port change bits feature */ |
4dd405a4 AS |
647 | if (ppcd & (1 << i)) |
648 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
649 | else | |
650 | temp = 0; | |
625b5c9a AS |
651 | |
652 | /* | |
653 | * Return status information even for ports with OWNER set. | |
654 | * Otherwise khubd wouldn't see the disconnect event when a | |
655 | * high-speed device is switched over to the companion | |
656 | * controller by the user. | |
657 | */ | |
658 | ||
eafe5b99 AS |
659 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
660 | || (ehci->reset_done[i] && time_after_eq( | |
661 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
662 | if (i < 7) |
663 | buf [0] |= 1 << (i + 1); | |
664 | else | |
665 | buf [1] |= 1 << (i - 7); | |
666 | status = STS_PCD; | |
667 | } | |
668 | } | |
ee74290b AS |
669 | |
670 | /* If a resume is in progress, make sure it can finish */ | |
671 | if (ehci->resuming_ports) | |
672 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); | |
673 | ||
1da177e4 LT |
674 | spin_unlock_irqrestore (&ehci->lock, flags); |
675 | return status ? retval : 0; | |
676 | } | |
677 | ||
678 | /*-------------------------------------------------------------------------*/ | |
679 | ||
680 | static void | |
681 | ehci_hub_descriptor ( | |
682 | struct ehci_hcd *ehci, | |
683 | struct usb_hub_descriptor *desc | |
684 | ) { | |
685 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
686 | u16 temp; | |
687 | ||
688 | desc->bDescriptorType = 0x29; | |
689 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
690 | desc->bHubContrCurrent = 0; | |
691 | ||
692 | desc->bNbrPorts = ports; | |
693 | temp = 1 + (ports / 8); | |
694 | desc->bDescLength = 7 + 2 * temp; | |
695 | ||
696 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
697 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
698 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 LT |
699 | |
700 | temp = 0x0008; /* per-port overcurrent reporting */ | |
701 | if (HCS_PPC (ehci->hcs_params)) | |
702 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
703 | else |
704 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
705 | #if 0 |
706 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
707 | if (HCS_INDICATOR (ehci->hcs_params)) | |
708 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
709 | #endif | |
fd05e720 | 710 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
711 | } |
712 | ||
713 | /*-------------------------------------------------------------------------*/ | |
714 | ||
1da177e4 LT |
715 | static int ehci_hub_control ( |
716 | struct usb_hcd *hcd, | |
717 | u16 typeReq, | |
718 | u16 wValue, | |
719 | u16 wIndex, | |
720 | char *buf, | |
721 | u16 wLength | |
722 | ) { | |
723 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
724 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
725 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
726 | (wIndex & 0xff) - 1]; | |
a46af4eb | 727 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1]; |
331ac6b2 | 728 | u32 temp, temp1, status; |
1da177e4 LT |
729 | unsigned long flags; |
730 | int retval = 0; | |
f0d7f273 | 731 | unsigned selector; |
1da177e4 LT |
732 | |
733 | /* | |
734 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
735 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
736 | * (track current state ourselves) ... blink for diagnostics, | |
737 | * power, "this is the one", etc. EHCI spec supports this. | |
738 | */ | |
739 | ||
740 | spin_lock_irqsave (&ehci->lock, flags); | |
741 | switch (typeReq) { | |
742 | case ClearHubFeature: | |
743 | switch (wValue) { | |
744 | case C_HUB_LOCAL_POWER: | |
745 | case C_HUB_OVER_CURRENT: | |
746 | /* no hub-wide feature/status flags */ | |
747 | break; | |
748 | default: | |
749 | goto error; | |
750 | } | |
751 | break; | |
752 | case ClearPortFeature: | |
753 | if (!wIndex || wIndex > ports) | |
754 | goto error; | |
755 | wIndex--; | |
e6316565 | 756 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 757 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
758 | |
759 | /* | |
760 | * Even if OWNER is set, so the port is owned by the | |
761 | * companion controller, khubd needs to be able to clear | |
762 | * the port-change status bits (especially | |
749da5f8 | 763 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 764 | */ |
1da177e4 LT |
765 | |
766 | switch (wValue) { | |
767 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 768 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
769 | break; |
770 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 771 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
772 | break; |
773 | case USB_PORT_FEAT_SUSPEND: | |
774 | if (temp & PORT_RESET) | |
775 | goto error; | |
f8aeb3bb DB |
776 | if (ehci->no_selective_suspend) |
777 | break; | |
83722bc9 AG |
778 | #ifdef CONFIG_USB_OTG |
779 | if ((hcd->self.otg_port == (wIndex + 1)) | |
780 | && hcd->self.b_hnp_enable) { | |
c2e935a7 | 781 | otg_start_hnp(hcd->phy->otg); |
83722bc9 AG |
782 | break; |
783 | } | |
784 | #endif | |
16032c4f AS |
785 | if (!(temp & PORT_SUSPEND)) |
786 | break; | |
787 | if ((temp & PORT_PE) == 0) | |
788 | goto error; | |
789 | ||
790 | /* clear phy low-power mode before resume */ | |
a46af4eb | 791 | if (ehci->has_hostpc) { |
16032c4f AS |
792 | temp1 = ehci_readl(ehci, hostpc_reg); |
793 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 794 | hostpc_reg); |
16032c4f AS |
795 | spin_unlock_irqrestore(&ehci->lock, flags); |
796 | msleep(5);/* wait to leave low-power mode */ | |
797 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 798 | } |
16032c4f | 799 | /* resume signaling for 20 msec */ |
6d5f89c7 | 800 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
801 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
802 | ehci->reset_done[wIndex] = jiffies | |
803 | + msecs_to_jiffies(20); | |
1da177e4 LT |
804 | break; |
805 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 806 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
807 | break; |
808 | case USB_PORT_FEAT_POWER: | |
809 | if (HCS_PPC (ehci->hcs_params)) | |
6d5f89c7 SW |
810 | ehci_writel(ehci, temp & ~PORT_POWER, |
811 | status_reg); | |
1da177e4 LT |
812 | break; |
813 | case USB_PORT_FEAT_C_CONNECTION: | |
6d5f89c7 | 814 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
815 | break; |
816 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 817 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
818 | break; |
819 | case USB_PORT_FEAT_C_RESET: | |
820 | /* GetPortStatus clears reset */ | |
821 | break; | |
822 | default: | |
823 | goto error; | |
824 | } | |
083522d7 | 825 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
826 | break; |
827 | case GetHubDescriptor: | |
828 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
829 | buf); | |
830 | break; | |
831 | case GetHubStatus: | |
832 | /* no hub-wide feature/status flags */ | |
833 | memset (buf, 0, 4); | |
834 | //cpu_to_le32s ((u32 *) buf); | |
835 | break; | |
836 | case GetPortStatus: | |
837 | if (!wIndex || wIndex > ports) | |
838 | goto error; | |
839 | wIndex--; | |
840 | status = 0; | |
e6316565 | 841 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
842 | |
843 | // wPortChange bits | |
844 | if (temp & PORT_CSC) | |
749da5f8 | 845 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 846 | if (temp & PORT_PEC) |
749da5f8 | 847 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
848 | |
849 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 850 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 851 | |
756aa6b3 CE |
852 | /* |
853 | * Hubs should disable port power on over-current. | |
854 | * However, not all EHCI implementations do this | |
855 | * automatically, even if they _do_ support per-port | |
856 | * power switching; they're allowed to just limit the | |
857 | * current. khubd will turn the power back on. | |
858 | */ | |
e6604a7f CE |
859 | if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
860 | && HCS_PPC(ehci->hcs_params)) { | |
756aa6b3 CE |
861 | ehci_writel(ehci, |
862 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
863 | status_reg); | |
81463c1d | 864 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
865 | } |
866 | } | |
867 | ||
1da177e4 | 868 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
869 | if (temp & PORT_RESUME) { |
870 | ||
871 | /* Remote Wakeup received? */ | |
872 | if (!ehci->reset_done[wIndex]) { | |
873 | /* resume signaling for 20 msec */ | |
874 | ehci->reset_done[wIndex] = jiffies | |
875 | + msecs_to_jiffies(20); | |
f292e7f9 | 876 | usb_hcd_start_port_resume(&hcd->self, wIndex); |
47a64a13 | 877 | set_bit(wIndex, &ehci->resuming_ports); |
629e4427 AS |
878 | /* check the port again */ |
879 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
880 | ehci->reset_done[wIndex]); | |
881 | } | |
1da177e4 | 882 | |
629e4427 AS |
883 | /* resume completed? */ |
884 | else if (time_after_eq(jiffies, | |
885 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 886 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 887 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 | 888 | ehci->reset_done[wIndex] = 0; |
f292e7f9 | 889 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
629e4427 AS |
890 | |
891 | /* stop resume signaling */ | |
24b90814 AS |
892 | temp &= ~(PORT_RWC_BITS | |
893 | PORT_SUSPEND | PORT_RESUME); | |
894 | ehci_writel(ehci, temp, status_reg); | |
a448e4dc | 895 | clear_bit(wIndex, &ehci->resuming_ports); |
2f3a6b86 | 896 | retval = ehci_handshake(ehci, status_reg, |
083522d7 | 897 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
898 | if (retval != 0) { |
899 | ehci_err(ehci, | |
900 | "port %d resume error %d\n", | |
901 | wIndex + 1, retval); | |
902 | goto error; | |
903 | } | |
24b90814 | 904 | temp = ehci_readl(ehci, status_reg); |
1da177e4 | 905 | } |
1da177e4 LT |
906 | } |
907 | ||
908 | /* whoever resets must GetPortStatus to complete it!! */ | |
909 | if ((temp & PORT_RESET) | |
629e4427 AS |
910 | && time_after_eq(jiffies, |
911 | ehci->reset_done[wIndex])) { | |
749da5f8 | 912 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 | 913 | ehci->reset_done [wIndex] = 0; |
a448e4dc | 914 | clear_bit(wIndex, &ehci->resuming_ports); |
1da177e4 LT |
915 | |
916 | /* force reset to complete */ | |
083522d7 | 917 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 918 | status_reg); |
c22fa3ac DB |
919 | /* REVISIT: some hardware needs 550+ usec to clear |
920 | * this bit; seems too long to spin routinely... | |
921 | */ | |
2f3a6b86 | 922 | retval = ehci_handshake(ehci, status_reg, |
6307e096 | 923 | PORT_RESET, 0, 1000); |
1da177e4 LT |
924 | if (retval != 0) { |
925 | ehci_err (ehci, "port %d reset error %d\n", | |
926 | wIndex + 1, retval); | |
927 | goto error; | |
928 | } | |
929 | ||
930 | /* see what we found out */ | |
e6316565 AS |
931 | temp = check_reset_complete (ehci, wIndex, status_reg, |
932 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
933 | } |
934 | ||
a448e4dc | 935 | if (!(temp & (PORT_RESUME|PORT_RESET))) { |
eafe5b99 | 936 | ehci->reset_done[wIndex] = 0; |
a448e4dc AS |
937 | clear_bit(wIndex, &ehci->resuming_ports); |
938 | } | |
eafe5b99 | 939 | |
57e06c11 AS |
940 | /* transfer dedicated ports to the companion hc */ |
941 | if ((temp & PORT_CONNECT) && | |
942 | test_bit(wIndex, &ehci->companion_ports)) { | |
943 | temp &= ~PORT_RWC_BITS; | |
944 | temp |= PORT_OWNER; | |
945 | ehci_writel(ehci, temp, status_reg); | |
946 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
947 | temp = ehci_readl(ehci, status_reg); | |
948 | } | |
949 | ||
625b5c9a AS |
950 | /* |
951 | * Even if OWNER is set, there's no harm letting khubd | |
952 | * see the wPortStatus values (they should all be 0 except | |
953 | * for PORT_POWER anyway). | |
954 | */ | |
955 | ||
956 | if (temp & PORT_CONNECT) { | |
749da5f8 | 957 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 958 | // status may be from integrated TT |
331ac6b2 AD |
959 | if (ehci->has_hostpc) { |
960 | temp1 = ehci_readl(ehci, hostpc_reg); | |
961 | status |= ehci_port_speed(ehci, temp1); | |
962 | } else | |
963 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 964 | } |
625b5c9a | 965 | if (temp & PORT_PE) |
749da5f8 | 966 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
967 | |
968 | /* maybe the port was unsuspended without our knowledge */ | |
969 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 970 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
971 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
972 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 973 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
974 | ehci->reset_done[wIndex] = 0; |
975 | if (temp & PORT_PE) | |
976 | set_bit(wIndex, &ehci->port_c_suspend); | |
f292e7f9 | 977 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
eafe5b99 AS |
978 | } |
979 | ||
625b5c9a | 980 | if (temp & PORT_OC) |
749da5f8 | 981 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 982 | if (temp & PORT_RESET) |
749da5f8 | 983 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 984 | if (temp & PORT_POWER) |
749da5f8 | 985 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 986 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 987 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 988 | |
9776afc8 | 989 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
990 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
991 | #endif | |
992 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 993 | put_unaligned_le32(status, buf); |
1da177e4 LT |
994 | break; |
995 | case SetHubFeature: | |
996 | switch (wValue) { | |
997 | case C_HUB_LOCAL_POWER: | |
998 | case C_HUB_OVER_CURRENT: | |
999 | /* no hub-wide feature/status flags */ | |
1000 | break; | |
1001 | default: | |
1002 | goto error; | |
1003 | } | |
1004 | break; | |
1005 | case SetPortFeature: | |
f0d7f273 DB |
1006 | selector = wIndex >> 8; |
1007 | wIndex &= 0xff; | |
8d053c79 JW |
1008 | if (unlikely(ehci->debug)) { |
1009 | /* If the debug port is active any port | |
1010 | * feature requests should get denied */ | |
1011 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
1012 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
1013 | retval = -ENODEV; | |
1014 | goto error_exit; | |
1015 | } | |
1016 | } | |
1da177e4 LT |
1017 | if (!wIndex || wIndex > ports) |
1018 | goto error; | |
1019 | wIndex--; | |
e6316565 | 1020 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1021 | if (temp & PORT_OWNER) |
1022 | break; | |
1023 | ||
10f6524a | 1024 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1025 | switch (wValue) { |
1026 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1027 | if (ehci->no_selective_suspend) |
1028 | break; | |
1da177e4 LT |
1029 | if ((temp & PORT_PE) == 0 |
1030 | || (temp & PORT_RESET) != 0) | |
1031 | goto error; | |
b9df7942 | 1032 | |
331ac6b2 AD |
1033 | /* After above check the port must be connected. |
1034 | * Set appropriate bit thus could put phy into low power | |
1035 | * mode if we have hostpc feature | |
1036 | */ | |
b9df7942 AD |
1037 | temp &= ~PORT_WKCONN_E; |
1038 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1039 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
a46af4eb | 1040 | if (ehci->has_hostpc) { |
b9df7942 | 1041 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1042 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1043 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1044 | temp1 = ehci_readl(ehci, hostpc_reg); |
1045 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1046 | hostpc_reg); | |
1047 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1048 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1049 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1050 | "succeeded" : "failed"); | |
1051 | } | |
eafe5b99 | 1052 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1053 | break; |
1054 | case USB_PORT_FEAT_POWER: | |
1055 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 1056 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 1057 | status_reg); |
1da177e4 LT |
1058 | break; |
1059 | case USB_PORT_FEAT_RESET: | |
1060 | if (temp & PORT_RESUME) | |
1061 | goto error; | |
1062 | /* line status bits may report this as low speed, | |
1063 | * which can be fine if this root hub has a | |
1064 | * transaction translator built in. | |
1065 | */ | |
1066 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1067 | && !ehci_is_TDI(ehci) | |
1068 | && PORT_USB11 (temp)) { | |
1069 | ehci_dbg (ehci, | |
1070 | "port %d low speed --> companion\n", | |
1071 | wIndex + 1); | |
1072 | temp |= PORT_OWNER; | |
1073 | } else { | |
1074 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
1075 | temp |= PORT_RESET; | |
1076 | temp &= ~PORT_PE; | |
1077 | ||
1078 | /* | |
1079 | * caller must wait, then call GetPortStatus | |
1080 | * usb 2.0 spec says 50 ms resets on root | |
1081 | */ | |
1082 | ehci->reset_done [wIndex] = jiffies | |
1083 | + msecs_to_jiffies (50); | |
1084 | } | |
e6316565 | 1085 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1086 | break; |
f0d7f273 DB |
1087 | |
1088 | /* For downstream facing ports (these): one hub port is put | |
1089 | * into test mode according to USB2 11.24.2.13, then the hub | |
1090 | * must be reset (which for root hub now means rmmod+modprobe, | |
1091 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1092 | * about the EHCI-specific stuff. | |
1093 | */ | |
1094 | case USB_PORT_FEAT_TEST: | |
1095 | if (!selector || selector > 5) | |
1096 | goto error; | |
c4f34764 | 1097 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1098 | ehci_quiesce(ehci); |
c4f34764 | 1099 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
1100 | |
1101 | /* Put all enabled ports into suspend */ | |
1102 | while (ports--) { | |
1103 | u32 __iomem *sreg = | |
1104 | &ehci->regs->port_status[ports]; | |
1105 | ||
1106 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; | |
1107 | if (temp & PORT_PE) | |
1108 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1109 | sreg); | |
1110 | } | |
c4f34764 AS |
1111 | |
1112 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1113 | ehci_halt(ehci); |
c4f34764 AS |
1114 | spin_lock_irqsave(&ehci->lock, flags); |
1115 | ||
77636c86 | 1116 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1117 | temp |= selector << 16; |
e6316565 | 1118 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1119 | break; |
1120 | ||
1da177e4 LT |
1121 | default: |
1122 | goto error; | |
1123 | } | |
083522d7 | 1124 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1125 | break; |
1126 | ||
1127 | default: | |
1128 | error: | |
1129 | /* "stall" on error */ | |
1130 | retval = -EPIPE; | |
1131 | } | |
8d053c79 | 1132 | error_exit: |
1da177e4 LT |
1133 | spin_unlock_irqrestore (&ehci->lock, flags); |
1134 | return retval; | |
1135 | } | |
90da096e | 1136 | |
3e023203 | 1137 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
90da096e BR |
1138 | { |
1139 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1140 | ||
1141 | if (ehci_is_TDI(ehci)) | |
1142 | return; | |
1143 | set_owner(ehci, --portnum, PORT_OWNER); | |
1144 | } | |
1145 | ||
3e023203 | 1146 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
3a31155c AS |
1147 | { |
1148 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1149 | u32 __iomem *reg; | |
1150 | ||
1151 | if (ehci_is_TDI(ehci)) | |
1152 | return 0; | |
1153 | reg = &ehci->regs->port_status[portnum - 1]; | |
1154 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1155 | } |