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 | ||
1586ba0c AS |
36 | static void unlink_empty_async_suspended(struct ehci_hcd *ehci); |
37 | ||
9b790915 JW |
38 | static int persist_enabled_on_companion(struct usb_device *udev, void *unused) |
39 | { | |
40 | return !udev->maxchild && udev->persist_enabled && | |
41 | udev->bus->root_hub->speed < USB_SPEED_HIGH; | |
42 | } | |
43 | ||
383975d7 AS |
44 | /* After a power loss, ports that were owned by the companion must be |
45 | * reset so that the companion can still own them. | |
46 | */ | |
47 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
48 | { | |
49 | u32 __iomem *reg; | |
50 | u32 status; | |
51 | int port; | |
52 | __le32 buf; | |
53 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
54 | ||
55 | if (!ehci->owned_ports) | |
56 | return; | |
57 | ||
9b790915 JW |
58 | /* |
59 | * USB 1.1 devices are mostly HIDs, which don't need to persist across | |
60 | * suspends. If we ensure that none of our companion's devices have | |
61 | * persist_enabled (by looking through all USB 1.1 buses in the system), | |
62 | * we can skip this and avoid slowing resume down. Devices without | |
63 | * persist will just get reenumerated shortly after resume anyway. | |
64 | */ | |
65 | if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) | |
66 | return; | |
67 | ||
c73cee71 AS |
68 | /* Make sure the ports are powered */ |
69 | port = HCS_N_PORTS(ehci->hcs_params); | |
70 | while (port--) { | |
71 | if (test_bit(port, &ehci->owned_ports)) { | |
72 | reg = &ehci->regs->port_status[port]; | |
73 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
11a7e594 MG |
74 | if (!(status & PORT_POWER)) |
75 | ehci_port_power(ehci, port, true); | |
c73cee71 AS |
76 | } |
77 | } | |
78 | ||
383975d7 AS |
79 | /* Give the connections some time to appear */ |
80 | msleep(20); | |
81 | ||
c4f34764 | 82 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
83 | port = HCS_N_PORTS(ehci->hcs_params); |
84 | while (port--) { | |
85 | if (test_bit(port, &ehci->owned_ports)) { | |
86 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 87 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
88 | |
89 | /* Port already owned by companion? */ | |
90 | if (status & PORT_OWNER) | |
91 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
92 | else if (test_bit(port, &ehci->companion_ports)) |
93 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
c4f34764 AS |
94 | else { |
95 | spin_unlock_irq(&ehci->lock); | |
383975d7 AS |
96 | ehci_hub_control(hcd, SetPortFeature, |
97 | USB_PORT_FEAT_RESET, port + 1, | |
98 | NULL, 0); | |
c4f34764 AS |
99 | spin_lock_irq(&ehci->lock); |
100 | } | |
383975d7 AS |
101 | } |
102 | } | |
c4f34764 | 103 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
104 | |
105 | if (!ehci->owned_ports) | |
106 | return; | |
107 | msleep(90); /* Wait for resets to complete */ | |
108 | ||
c4f34764 | 109 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
110 | port = HCS_N_PORTS(ehci->hcs_params); |
111 | while (port--) { | |
112 | if (test_bit(port, &ehci->owned_ports)) { | |
c4f34764 | 113 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
114 | ehci_hub_control(hcd, GetPortStatus, |
115 | 0, port + 1, | |
116 | (char *) &buf, sizeof(buf)); | |
c4f34764 | 117 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
118 | |
119 | /* The companion should now own the port, | |
120 | * but if something went wrong the port must not | |
121 | * remain enabled. | |
122 | */ | |
123 | reg = &ehci->regs->port_status[port]; | |
124 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
125 | if (status & PORT_OWNER) | |
126 | ehci_writel(ehci, status | PORT_CSC, reg); | |
127 | else { | |
128 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
129 | port + 1, status); | |
130 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
131 | } | |
132 | } | |
133 | } | |
134 | ||
135 | ehci->owned_ports = 0; | |
c4f34764 | 136 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
137 | } |
138 | ||
c5cf9212 | 139 | static int ehci_port_change(struct ehci_hcd *ehci) |
294d95f2 MG |
140 | { |
141 | int i = HCS_N_PORTS(ehci->hcs_params); | |
142 | ||
143 | /* First check if the controller indicates a change event */ | |
144 | ||
145 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) | |
146 | return 1; | |
147 | ||
148 | /* | |
149 | * Not all controllers appear to update this while going from D3 to D0, | |
150 | * so check the individual port status registers as well | |
151 | */ | |
152 | ||
153 | while (i--) | |
154 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) | |
155 | return 1; | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
74db22cb | 160 | void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 161 | bool suspending, bool do_wakeup) |
16032c4f AS |
162 | { |
163 | int port; | |
164 | u32 temp; | |
165 | ||
166 | /* If remote wakeup is enabled for the root hub but disabled | |
167 | * for the controller, we must adjust all the port wakeup flags | |
168 | * when the controller is suspended or resumed. In all other | |
169 | * cases they don't need to be changed. | |
170 | */ | |
4147200d | 171 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
172 | return; |
173 | ||
c4f34764 | 174 | spin_lock_irq(&ehci->lock); |
148fc55f | 175 | |
16032c4f | 176 | /* clear phy low-power mode before changing wakeup flags */ |
2cdcec4f | 177 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
178 | port = HCS_N_PORTS(ehci->hcs_params); |
179 | while (port--) { | |
a46af4eb | 180 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 181 | |
16032c4f AS |
182 | temp = ehci_readl(ehci, hostpc_reg); |
183 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
184 | } | |
c4f34764 | 185 | spin_unlock_irq(&ehci->lock); |
16032c4f | 186 | msleep(5); |
c4f34764 | 187 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
188 | } |
189 | ||
190 | port = HCS_N_PORTS(ehci->hcs_params); | |
191 | while (port--) { | |
192 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
193 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
194 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
195 | ||
196 | /* If we are suspending the controller, clear the flags. | |
197 | * If we are resuming the controller, set the wakeup flags. | |
198 | */ | |
199 | if (!suspending) { | |
200 | if (t1 & PORT_CONNECT) | |
201 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
202 | else | |
203 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
204 | } | |
16032c4f AS |
205 | ehci_writel(ehci, t2, reg); |
206 | } | |
207 | ||
208 | /* enter phy low-power mode again */ | |
2cdcec4f | 209 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
210 | port = HCS_N_PORTS(ehci->hcs_params); |
211 | while (port--) { | |
a46af4eb | 212 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 213 | |
16032c4f AS |
214 | temp = ehci_readl(ehci, hostpc_reg); |
215 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
216 | } | |
217 | } | |
ee0b9be8 AS |
218 | |
219 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 220 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 221 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f | 222 | |
c4f34764 | 223 | spin_unlock_irq(&ehci->lock); |
16032c4f | 224 | } |
74db22cb | 225 | EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags); |
16032c4f | 226 | |
0c0382e3 | 227 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
228 | { |
229 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
230 | int port; | |
8c03356a | 231 | int mask; |
16032c4f | 232 | int changed; |
3e8d6d85 | 233 | bool fs_idle_delay; |
1da177e4 | 234 | |
8c774fe8 AS |
235 | ehci_dbg(ehci, "suspend root hub\n"); |
236 | ||
1da177e4 LT |
237 | if (time_before (jiffies, ehci->next_statechange)) |
238 | msleep(5); | |
239 | ||
c4f34764 AS |
240 | /* stop the schedules */ |
241 | ehci_quiesce(ehci); | |
242 | ||
1da177e4 | 243 | spin_lock_irq (&ehci->lock); |
43fe3a99 AS |
244 | if (ehci->rh_state < EHCI_RH_RUNNING) |
245 | goto done; | |
1da177e4 | 246 | |
cec3a53c AS |
247 | /* Once the controller is stopped, port resumes that are already |
248 | * in progress won't complete. Hence if remote wakeup is enabled | |
249 | * for the root hub and any ports are in the middle of a resume or | |
250 | * remote wakeup, we must fail the suspend. | |
251 | */ | |
252 | if (hcd->self.root_hub->do_remote_wakeup) { | |
a448e4dc AS |
253 | if (ehci->resuming_ports) { |
254 | spin_unlock_irq(&ehci->lock); | |
255 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); | |
256 | return -EBUSY; | |
cec3a53c AS |
257 | } |
258 | } | |
259 | ||
8c03356a AS |
260 | /* Unlike other USB host controller types, EHCI doesn't have |
261 | * any notion of "global" or bus-wide suspend. The driver has | |
262 | * to manually suspend all the active unsuspended ports, and | |
263 | * then manually resume them in the bus_resume() routine. | |
264 | */ | |
265 | ehci->bus_suspended = 0; | |
383975d7 | 266 | ehci->owned_ports = 0; |
16032c4f | 267 | changed = 0; |
3e8d6d85 | 268 | fs_idle_delay = false; |
cec3a53c | 269 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
270 | while (port--) { |
271 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 272 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 273 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 274 | |
8c03356a | 275 | /* keep track of which ports we suspend */ |
383975d7 AS |
276 | if (t1 & PORT_OWNER) |
277 | set_bit(port, &ehci->owned_ports); | |
278 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 279 | t2 |= PORT_SUSPEND; |
8c03356a AS |
280 | set_bit(port, &ehci->bus_suspended); |
281 | } | |
282 | ||
16032c4f | 283 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
284 | if (hcd->self.root_hub->do_remote_wakeup) { |
285 | /* only enable appropriate wake bits, otherwise the | |
286 | * hardware can not go phy low power mode. If a race | |
287 | * condition happens here(connection change during bits | |
288 | * set), the port change detection will finally fix it. | |
289 | */ | |
16032c4f | 290 | if (t1 & PORT_CONNECT) |
331ac6b2 | 291 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 292 | else |
331ac6b2 | 293 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 294 | } |
1da177e4 LT |
295 | |
296 | if (t1 != t2) { | |
3e8d6d85 AS |
297 | /* |
298 | * On some controllers, Wake-On-Disconnect will | |
299 | * generate false wakeup signals until the bus | |
300 | * switches over to full-speed idle. For their | |
301 | * sake, add a delay if we need one. | |
302 | */ | |
303 | if ((t2 & PORT_WKDISC_E) && | |
304 | ehci_port_speed(ehci, t2) == | |
305 | USB_PORT_STAT_HIGH_SPEED) | |
306 | fs_idle_delay = true; | |
083522d7 | 307 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
308 | changed = 1; |
309 | } | |
310 | } | |
3e8d6d85 AS |
311 | spin_unlock_irq(&ehci->lock); |
312 | ||
313 | if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { | |
314 | /* | |
315 | * Wait for HCD to enter low-power mode or for the bus | |
316 | * to switch to full-speed idle. | |
317 | */ | |
318 | usleep_range(5000, 5500); | |
319 | } | |
331ac6b2 | 320 | |
2cdcec4f | 321 | if (changed && ehci->has_tdi_phy_lpm) { |
16032c4f | 322 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
323 | port = HCS_N_PORTS(ehci->hcs_params); |
324 | while (port--) { | |
a46af4eb | 325 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f AS |
326 | u32 t3; |
327 | ||
16032c4f AS |
328 | t3 = ehci_readl(ehci, hostpc_reg); |
329 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
330 | t3 = ehci_readl(ehci, hostpc_reg); | |
331 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
332 | port, (t3 & HOSTPC_PHCD) ? |
333 | "succeeded" : "failed"); | |
1da177e4 | 334 | } |
3e8d6d85 | 335 | spin_unlock_irq(&ehci->lock); |
1da177e4 LT |
336 | } |
337 | ||
cd930c93 AS |
338 | /* Apparently some devices need a >= 1-uframe delay here */ |
339 | if (ehci->bus_suspended) | |
340 | udelay(150); | |
341 | ||
1da177e4 LT |
342 | /* turn off now-idle HC */ |
343 | ehci_halt (ehci); | |
c4f34764 AS |
344 | |
345 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
346 | if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
347 | ehci_handle_controller_death(ehci); | |
348 | if (ehci->rh_state != EHCI_RH_RUNNING) | |
349 | goto done; | |
e8799906 | 350 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1da177e4 | 351 | |
8df0d77d AS |
352 | unlink_empty_async_suspended(ehci); |
353 | ||
f96fba0d AS |
354 | /* Any IAA cycle that started before the suspend is now invalid */ |
355 | end_iaa_cycle(ehci); | |
9118f9eb | 356 | ehci_handle_start_intr_unlinks(ehci); |
df202255 | 357 | ehci_handle_intr_unlinks(ehci); |
55934eb3 | 358 | end_free_itds(ehci); |
cdc647a9 | 359 | |
8c03356a AS |
360 | /* allow remote wakeup */ |
361 | mask = INTR_MASK; | |
58a97ffe | 362 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 363 | mask &= ~STS_PCD; |
083522d7 BH |
364 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
365 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 366 | |
43fe3a99 | 367 | done: |
1da177e4 | 368 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
d58b4bcc AS |
369 | ehci->enabled_hrtimer_events = 0; |
370 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
1da177e4 | 371 | spin_unlock_irq (&ehci->lock); |
015798b2 | 372 | |
d58b4bcc | 373 | hrtimer_cancel(&ehci->hrtimer); |
1da177e4 LT |
374 | return 0; |
375 | } | |
376 | ||
377 | ||
378 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 379 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
380 | { |
381 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
382 | u32 temp; | |
383975d7 | 383 | u32 power_okay; |
1da177e4 | 384 | int i; |
d0f2fb25 | 385 | unsigned long resume_needed = 0; |
1da177e4 LT |
386 | |
387 | if (time_before (jiffies, ehci->next_statechange)) | |
388 | msleep(5); | |
389 | spin_lock_irq (&ehci->lock); | |
43fe3a99 AS |
390 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
391 | goto shutdown; | |
1da177e4 | 392 | |
ad45f1dc | 393 | if (unlikely(ehci->debug)) { |
9fa5780b | 394 | if (!dbgp_reset_prep(hcd)) |
ad45f1dc JW |
395 | ehci->debug = NULL; |
396 | else | |
9fa5780b | 397 | dbgp_external_startup(hcd); |
ad45f1dc JW |
398 | } |
399 | ||
f03c17fc DB |
400 | /* Ideally and we've got a real resume here, and no port's power |
401 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
402 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
403 | * the last user of the controller, not reset/pm hardware keeping | |
404 | * state we gave to it. | |
405 | */ | |
383975d7 AS |
406 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
407 | ehci_dbg(ehci, "resume root hub%s\n", | |
408 | power_okay ? "" : " after power loss"); | |
f03c17fc | 409 | |
8c03356a AS |
410 | /* at least some APM implementations will try to deliver |
411 | * IRQs right away, so delay them until we're ready. | |
412 | */ | |
083522d7 | 413 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
414 | |
415 | /* re-init operational registers */ | |
083522d7 BH |
416 | ehci_writel(ehci, 0, &ehci->regs->segment); |
417 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
418 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
419 | |
420 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
3d9545cc | 421 | ehci->command |= CMD_RUN; |
083522d7 | 422 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
e8799906 | 423 | ehci->rh_state = EHCI_RH_RUNNING; |
1da177e4 | 424 | |
6273f181 PC |
425 | /* |
426 | * According to Bugzilla #8190, the port status for some controllers | |
427 | * will be wrong without a delay. At their wrong status, the port | |
428 | * is enabled, but not suspended neither resumed. | |
429 | */ | |
430 | i = HCS_N_PORTS(ehci->hcs_params); | |
431 | while (i--) { | |
432 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
433 | if ((temp & PORT_PE) && | |
434 | !(temp & (PORT_SUSPEND | PORT_RESUME))) { | |
435 | ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); | |
436 | spin_unlock_irq(&ehci->lock); | |
437 | msleep(8); | |
438 | spin_lock_irq(&ehci->lock); | |
439 | break; | |
440 | } | |
441 | } | |
442 | ||
43fe3a99 AS |
443 | if (ehci->shutdown) |
444 | goto shutdown; | |
e198a314 | 445 | |
16032c4f | 446 | /* clear phy low-power mode before resume */ |
2cdcec4f | 447 | if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { |
16032c4f AS |
448 | i = HCS_N_PORTS(ehci->hcs_params); |
449 | while (i--) { | |
450 | if (test_bit(i, &ehci->bus_suspended)) { | |
a46af4eb AS |
451 | u32 __iomem *hostpc_reg = |
452 | &ehci->regs->hostpc[i]; | |
16032c4f | 453 | |
16032c4f AS |
454 | temp = ehci_readl(ehci, hostpc_reg); |
455 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
456 | hostpc_reg); | |
457 | } | |
458 | } | |
459 | spin_unlock_irq(&ehci->lock); | |
460 | msleep(5); | |
461 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
462 | if (ehci->shutdown) |
463 | goto shutdown; | |
16032c4f AS |
464 | } |
465 | ||
8c03356a | 466 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
467 | i = HCS_N_PORTS (ehci->hcs_params); |
468 | while (i--) { | |
083522d7 | 469 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 470 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 471 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 472 | (temp & PORT_SUSPEND)) { |
1da177e4 | 473 | temp |= PORT_RESUME; |
d0f2fb25 | 474 | set_bit(i, &resume_needed); |
3a4e72cb | 475 | } |
083522d7 | 476 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 477 | } |
3a4e72cb | 478 | |
ea16328f FB |
479 | /* |
480 | * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume | |
481 | * port | |
482 | */ | |
3a4e72cb VP |
483 | if (resume_needed) { |
484 | spin_unlock_irq(&ehci->lock); | |
ea16328f | 485 | msleep(USB_RESUME_TIMEOUT); |
3a4e72cb | 486 | spin_lock_irq(&ehci->lock); |
43fe3a99 AS |
487 | if (ehci->shutdown) |
488 | goto shutdown; | |
3a4e72cb VP |
489 | } |
490 | ||
1da177e4 | 491 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 492 | while (i--) { |
083522d7 | 493 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
d0f2fb25 | 494 | if (test_bit(i, &resume_needed)) { |
24b90814 | 495 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
083522d7 | 496 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a | 497 | } |
1da177e4 | 498 | } |
1da177e4 LT |
499 | |
500 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
c4f34764 AS |
501 | spin_unlock_irq(&ehci->lock); |
502 | ||
503 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
504 | |
505 | /* Now we can safely re-enable irqs */ | |
43fe3a99 AS |
506 | spin_lock_irq(&ehci->lock); |
507 | if (ehci->shutdown) | |
508 | goto shutdown; | |
083522d7 | 509 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
15be105b | 510 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
43fe3a99 | 511 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 512 | |
1da177e4 | 513 | return 0; |
43fe3a99 AS |
514 | |
515 | shutdown: | |
516 | spin_unlock_irq(&ehci->lock); | |
517 | return -ESHUTDOWN; | |
1da177e4 LT |
518 | } |
519 | ||
520 | #else | |
521 | ||
0c0382e3 AS |
522 | #define ehci_bus_suspend NULL |
523 | #define ehci_bus_resume NULL | |
1da177e4 LT |
524 | |
525 | #endif /* CONFIG_PM */ | |
526 | ||
57e06c11 AS |
527 | /*-------------------------------------------------------------------------*/ |
528 | ||
57e06c11 | 529 | /* |
90da096e | 530 | * Sets the owner of a port |
57e06c11 | 531 | */ |
90da096e | 532 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 533 | { |
57e06c11 AS |
534 | u32 __iomem *status_reg; |
535 | u32 port_status; | |
90da096e | 536 | int try; |
57e06c11 | 537 | |
90da096e | 538 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
539 | |
540 | /* | |
541 | * The controller won't set the OWNER bit if the port is | |
542 | * enabled, so this loop will sometimes require at least two | |
543 | * iterations: one to disable the port and one to set OWNER. | |
544 | */ | |
57e06c11 AS |
545 | for (try = 4; try > 0; --try) { |
546 | spin_lock_irq(&ehci->lock); | |
547 | port_status = ehci_readl(ehci, status_reg); | |
548 | if ((port_status & PORT_OWNER) == new_owner | |
549 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
550 | == 0) | |
551 | try = 0; | |
552 | else { | |
553 | port_status ^= PORT_OWNER; | |
554 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
555 | ehci_writel(ehci, port_status, status_reg); | |
556 | } | |
557 | spin_unlock_irq(&ehci->lock); | |
558 | if (try > 1) | |
559 | msleep(5); | |
560 | } | |
90da096e BR |
561 | } |
562 | ||
1da177e4 LT |
563 | /*-------------------------------------------------------------------------*/ |
564 | ||
565 | static int check_reset_complete ( | |
566 | struct ehci_hcd *ehci, | |
567 | int index, | |
e6316565 | 568 | u32 __iomem *status_reg, |
1da177e4 LT |
569 | int port_status |
570 | ) { | |
cd4cdc93 | 571 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 572 | return port_status; |
1da177e4 LT |
573 | |
574 | /* if reset finished and it's still not enabled -- handoff */ | |
575 | if (!(port_status & PORT_PE)) { | |
576 | ||
577 | /* with integrated TT, there's nobody to hand it to! */ | |
578 | if (ehci_is_TDI(ehci)) { | |
579 | ehci_dbg (ehci, | |
580 | "Failed to enable port %d on root hub TT\n", | |
581 | index+1); | |
582 | return port_status; | |
583 | } | |
584 | ||
585 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
586 | index + 1); | |
587 | ||
588 | // what happens if HCS_N_CC(params) == 0 ? | |
589 | port_status |= PORT_OWNER; | |
10f6524a | 590 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 591 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 592 | |
796bcae7 VB |
593 | /* ensure 440EPX ohci controller state is operational */ |
594 | if (ehci->has_amcc_usb23) | |
595 | set_ohci_hcfs(ehci, 1); | |
596 | } else { | |
0ca7eb23 PC |
597 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
598 | index + 1); | |
796bcae7 VB |
599 | /* ensure 440EPx ohci controller state is suspended */ |
600 | if (ehci->has_amcc_usb23) | |
601 | set_ohci_hcfs(ehci, 0); | |
602 | } | |
1da177e4 LT |
603 | |
604 | return port_status; | |
605 | } | |
606 | ||
607 | /*-------------------------------------------------------------------------*/ | |
608 | ||
609 | ||
610 | /* build "status change" packet (one or two bytes) from HC registers */ | |
611 | ||
612 | static int | |
613 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
614 | { | |
615 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
a448e4dc | 616 | u32 temp, status; |
93f1a47c | 617 | u32 mask; |
1da177e4 LT |
618 | int ports, i, retval = 1; |
619 | unsigned long flags; | |
4dd405a4 | 620 | u32 ppcd = ~0; |
1da177e4 | 621 | |
1da177e4 LT |
622 | /* init status to no-changes */ |
623 | buf [0] = 0; | |
624 | ports = HCS_N_PORTS (ehci->hcs_params); | |
625 | if (ports > 7) { | |
626 | buf [1] = 0; | |
627 | retval++; | |
628 | } | |
53bd6a60 | 629 | |
a448e4dc AS |
630 | /* Inform the core about resumes-in-progress by returning |
631 | * a non-zero value even if there are no status changes. | |
632 | */ | |
633 | status = ehci->resuming_ports; | |
634 | ||
93f1a47c DB |
635 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
636 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 637 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
638 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
639 | * PORT_POWER; that's surprising, but maybe within-spec. | |
640 | */ | |
641 | if (!ignore_oc) | |
642 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
643 | else | |
644 | mask = PORT_CSC | PORT_PEC; | |
645 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
646 | ||
1da177e4 LT |
647 | /* no hub change reports (bit 0) for now (power, ...) */ |
648 | ||
649 | /* port N changes (bit N)? */ | |
650 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
651 | |
652 | /* get per-port change detect bits */ | |
653 | if (ehci->has_ppcd) | |
654 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
655 | ||
1da177e4 | 656 | for (i = 0; i < ports; i++) { |
5a9cdf33 | 657 | /* leverage per-port change bits feature */ |
4dd405a4 AS |
658 | if (ppcd & (1 << i)) |
659 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
660 | else | |
661 | temp = 0; | |
625b5c9a AS |
662 | |
663 | /* | |
664 | * Return status information even for ports with OWNER set. | |
37ebb549 | 665 | * Otherwise hub_wq wouldn't see the disconnect event when a |
625b5c9a AS |
666 | * high-speed device is switched over to the companion |
667 | * controller by the user. | |
668 | */ | |
669 | ||
eafe5b99 AS |
670 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
671 | || (ehci->reset_done[i] && time_after_eq( | |
672 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
673 | if (i < 7) |
674 | buf [0] |= 1 << (i + 1); | |
675 | else | |
676 | buf [1] |= 1 << (i - 7); | |
677 | status = STS_PCD; | |
678 | } | |
679 | } | |
ee74290b AS |
680 | |
681 | /* If a resume is in progress, make sure it can finish */ | |
682 | if (ehci->resuming_ports) | |
683 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); | |
684 | ||
1da177e4 LT |
685 | spin_unlock_irqrestore (&ehci->lock, flags); |
686 | return status ? retval : 0; | |
687 | } | |
688 | ||
689 | /*-------------------------------------------------------------------------*/ | |
690 | ||
691 | static void | |
692 | ehci_hub_descriptor ( | |
693 | struct ehci_hcd *ehci, | |
694 | struct usb_hub_descriptor *desc | |
695 | ) { | |
696 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
697 | u16 temp; | |
698 | ||
625a4c59 | 699 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 LT |
700 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ |
701 | desc->bHubContrCurrent = 0; | |
702 | ||
703 | desc->bNbrPorts = ports; | |
704 | temp = 1 + (ports / 8); | |
705 | desc->bDescLength = 7 + 2 * temp; | |
706 | ||
707 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
708 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
709 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 | 710 | |
3a2359ee | 711 | temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ |
1da177e4 | 712 | if (HCS_PPC (ehci->hcs_params)) |
3a2359ee | 713 | temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ |
56c1e26d | 714 | else |
3a2359ee | 715 | temp |= HUB_CHAR_NO_LPSM; /* no power switching */ |
1da177e4 LT |
716 | #if 0 |
717 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
718 | if (HCS_INDICATOR (ehci->hcs_params)) | |
3a2359ee | 719 | temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ |
1da177e4 | 720 | #endif |
fd05e720 | 721 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
722 | } |
723 | ||
9841f37a | 724 | /*-------------------------------------------------------------------------*/ |
726a85ca JP |
725 | #ifdef CONFIG_USB_HCD_TEST_MODE |
726 | ||
9841f37a MG |
727 | #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06 |
728 | ||
729 | static void usb_ehset_completion(struct urb *urb) | |
730 | { | |
731 | struct completion *done = urb->context; | |
732 | ||
733 | complete(done); | |
734 | } | |
735 | static int submit_single_step_set_feature( | |
736 | struct usb_hcd *hcd, | |
737 | struct urb *urb, | |
738 | int is_setup | |
739 | ); | |
740 | ||
741 | /* | |
742 | * Allocate and initialize a control URB. This request will be used by the | |
743 | * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages | |
744 | * of the GetDescriptor request are sent 15 seconds after the SETUP stage. | |
745 | * Return NULL if failed. | |
746 | */ | |
747 | static struct urb *request_single_step_set_feature_urb( | |
748 | struct usb_device *udev, | |
749 | void *dr, | |
750 | void *buf, | |
751 | struct completion *done | |
752 | ) { | |
753 | struct urb *urb; | |
754 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
755 | struct usb_host_endpoint *ep; | |
756 | ||
757 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
758 | if (!urb) | |
759 | return NULL; | |
760 | ||
761 | urb->pipe = usb_rcvctrlpipe(udev, 0); | |
762 | ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out) | |
763 | [usb_pipeendpoint(urb->pipe)]; | |
764 | if (!ep) { | |
765 | usb_free_urb(urb); | |
766 | return NULL; | |
767 | } | |
768 | ||
769 | urb->ep = ep; | |
770 | urb->dev = udev; | |
771 | urb->setup_packet = (void *)dr; | |
772 | urb->transfer_buffer = buf; | |
773 | urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; | |
774 | urb->complete = usb_ehset_completion; | |
775 | urb->status = -EINPROGRESS; | |
776 | urb->actual_length = 0; | |
777 | urb->transfer_flags = URB_DIR_IN; | |
778 | usb_get_urb(urb); | |
779 | atomic_inc(&urb->use_count); | |
780 | atomic_inc(&urb->dev->urbnum); | |
781 | urb->setup_dma = dma_map_single( | |
782 | hcd->self.controller, | |
783 | urb->setup_packet, | |
784 | sizeof(struct usb_ctrlrequest), | |
785 | DMA_TO_DEVICE); | |
786 | urb->transfer_dma = dma_map_single( | |
787 | hcd->self.controller, | |
788 | urb->transfer_buffer, | |
789 | urb->transfer_buffer_length, | |
790 | DMA_FROM_DEVICE); | |
791 | urb->context = done; | |
792 | return urb; | |
793 | } | |
794 | ||
795 | static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) | |
796 | { | |
797 | int retval = -ENOMEM; | |
798 | struct usb_ctrlrequest *dr; | |
799 | struct urb *urb; | |
800 | struct usb_device *udev; | |
801 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
802 | struct usb_device_descriptor *buf; | |
803 | DECLARE_COMPLETION_ONSTACK(done); | |
804 | ||
805 | /* Obtain udev of the rhub's child port */ | |
806 | udev = usb_hub_find_child(hcd->self.root_hub, port); | |
807 | if (!udev) { | |
808 | ehci_err(ehci, "No device attached to the RootHub\n"); | |
809 | return -ENODEV; | |
810 | } | |
811 | buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); | |
812 | if (!buf) | |
813 | return -ENOMEM; | |
814 | ||
815 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | |
816 | if (!dr) { | |
817 | kfree(buf); | |
818 | return -ENOMEM; | |
819 | } | |
820 | ||
821 | /* Fill Setup packet for GetDescriptor */ | |
822 | dr->bRequestType = USB_DIR_IN; | |
823 | dr->bRequest = USB_REQ_GET_DESCRIPTOR; | |
824 | dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); | |
825 | dr->wIndex = 0; | |
826 | dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); | |
827 | urb = request_single_step_set_feature_urb(udev, dr, buf, &done); | |
828 | if (!urb) | |
829 | goto cleanup; | |
830 | ||
831 | /* Submit just the SETUP stage */ | |
832 | retval = submit_single_step_set_feature(hcd, urb, 1); | |
833 | if (retval) | |
834 | goto out1; | |
835 | if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { | |
836 | usb_kill_urb(urb); | |
837 | retval = -ETIMEDOUT; | |
838 | ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__); | |
839 | goto out1; | |
840 | } | |
841 | msleep(15 * 1000); | |
842 | ||
843 | /* Complete remaining DATA and STATUS stages using the same URB */ | |
844 | urb->status = -EINPROGRESS; | |
845 | usb_get_urb(urb); | |
846 | atomic_inc(&urb->use_count); | |
847 | atomic_inc(&urb->dev->urbnum); | |
848 | retval = submit_single_step_set_feature(hcd, urb, 0); | |
849 | if (!retval && !wait_for_completion_timeout(&done, | |
850 | msecs_to_jiffies(2000))) { | |
851 | usb_kill_urb(urb); | |
852 | retval = -ETIMEDOUT; | |
853 | ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__); | |
854 | } | |
855 | out1: | |
856 | usb_free_urb(urb); | |
857 | cleanup: | |
858 | kfree(dr); | |
859 | kfree(buf); | |
860 | return retval; | |
861 | } | |
726a85ca | 862 | #endif /* CONFIG_USB_HCD_TEST_MODE */ |
1da177e4 LT |
863 | /*-------------------------------------------------------------------------*/ |
864 | ||
37769939 | 865 | int ehci_hub_control( |
1da177e4 LT |
866 | struct usb_hcd *hcd, |
867 | u16 typeReq, | |
868 | u16 wValue, | |
869 | u16 wIndex, | |
870 | char *buf, | |
871 | u16 wLength | |
872 | ) { | |
873 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
874 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
85e3990b | 875 | u32 __iomem *status_reg, *hostpc_reg; |
331ac6b2 | 876 | u32 temp, temp1, status; |
1da177e4 LT |
877 | unsigned long flags; |
878 | int retval = 0; | |
f0d7f273 | 879 | unsigned selector; |
1da177e4 | 880 | |
85e3990b AS |
881 | /* |
882 | * Avoid underflow while calculating (wIndex & 0xff) - 1. | |
883 | * The compiler might deduce that wIndex can never be 0 and then | |
884 | * optimize away the tests for !wIndex below. | |
885 | */ | |
886 | temp = wIndex & 0xff; | |
887 | temp -= (temp > 0); | |
888 | status_reg = &ehci->regs->port_status[temp]; | |
889 | hostpc_reg = &ehci->regs->hostpc[temp]; | |
890 | ||
1da177e4 LT |
891 | /* |
892 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
893 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
894 | * (track current state ourselves) ... blink for diagnostics, | |
895 | * power, "this is the one", etc. EHCI spec supports this. | |
896 | */ | |
897 | ||
898 | spin_lock_irqsave (&ehci->lock, flags); | |
899 | switch (typeReq) { | |
900 | case ClearHubFeature: | |
901 | switch (wValue) { | |
902 | case C_HUB_LOCAL_POWER: | |
903 | case C_HUB_OVER_CURRENT: | |
904 | /* no hub-wide feature/status flags */ | |
905 | break; | |
906 | default: | |
907 | goto error; | |
908 | } | |
909 | break; | |
910 | case ClearPortFeature: | |
911 | if (!wIndex || wIndex > ports) | |
912 | goto error; | |
913 | wIndex--; | |
e6316565 | 914 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 915 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
916 | |
917 | /* | |
918 | * Even if OWNER is set, so the port is owned by the | |
37ebb549 | 919 | * companion controller, hub_wq needs to be able to clear |
625b5c9a | 920 | * the port-change status bits (especially |
749da5f8 | 921 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 922 | */ |
1da177e4 LT |
923 | |
924 | switch (wValue) { | |
925 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 926 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
927 | break; |
928 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 929 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
930 | break; |
931 | case USB_PORT_FEAT_SUSPEND: | |
932 | if (temp & PORT_RESET) | |
933 | goto error; | |
f8aeb3bb DB |
934 | if (ehci->no_selective_suspend) |
935 | break; | |
83722bc9 AG |
936 | #ifdef CONFIG_USB_OTG |
937 | if ((hcd->self.otg_port == (wIndex + 1)) | |
938 | && hcd->self.b_hnp_enable) { | |
3d46e73d | 939 | otg_start_hnp(hcd->usb_phy->otg); |
83722bc9 AG |
940 | break; |
941 | } | |
942 | #endif | |
16032c4f AS |
943 | if (!(temp & PORT_SUSPEND)) |
944 | break; | |
945 | if ((temp & PORT_PE) == 0) | |
946 | goto error; | |
947 | ||
948 | /* clear phy low-power mode before resume */ | |
2cdcec4f | 949 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
950 | temp1 = ehci_readl(ehci, hostpc_reg); |
951 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 952 | hostpc_reg); |
16032c4f AS |
953 | spin_unlock_irqrestore(&ehci->lock, flags); |
954 | msleep(5);/* wait to leave low-power mode */ | |
955 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 956 | } |
16032c4f | 957 | /* resume signaling for 20 msec */ |
6d5f89c7 | 958 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
959 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
960 | ehci->reset_done[wIndex] = jiffies | |
ea16328f | 961 | + msecs_to_jiffies(USB_RESUME_TIMEOUT); |
3a20446f AS |
962 | set_bit(wIndex, &ehci->resuming_ports); |
963 | usb_hcd_start_port_resume(&hcd->self, wIndex); | |
1da177e4 LT |
964 | break; |
965 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 966 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
967 | break; |
968 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
969 | if (HCS_PPC(ehci->hcs_params)) { |
970 | spin_unlock_irqrestore(&ehci->lock, flags); | |
971 | ehci_port_power(ehci, wIndex, false); | |
972 | spin_lock_irqsave(&ehci->lock, flags); | |
973 | } | |
1da177e4 LT |
974 | break; |
975 | case USB_PORT_FEAT_C_CONNECTION: | |
6d5f89c7 | 976 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
977 | break; |
978 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 979 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
980 | break; |
981 | case USB_PORT_FEAT_C_RESET: | |
982 | /* GetPortStatus clears reset */ | |
983 | break; | |
984 | default: | |
985 | goto error; | |
986 | } | |
083522d7 | 987 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
988 | break; |
989 | case GetHubDescriptor: | |
990 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
991 | buf); | |
992 | break; | |
993 | case GetHubStatus: | |
994 | /* no hub-wide feature/status flags */ | |
995 | memset (buf, 0, 4); | |
996 | //cpu_to_le32s ((u32 *) buf); | |
997 | break; | |
998 | case GetPortStatus: | |
999 | if (!wIndex || wIndex > ports) | |
1000 | goto error; | |
1001 | wIndex--; | |
1002 | status = 0; | |
e6316565 | 1003 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1004 | |
1005 | // wPortChange bits | |
1006 | if (temp & PORT_CSC) | |
749da5f8 | 1007 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 1008 | if (temp & PORT_PEC) |
749da5f8 | 1009 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
1010 | |
1011 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 1012 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 1013 | |
756aa6b3 CE |
1014 | /* |
1015 | * Hubs should disable port power on over-current. | |
1016 | * However, not all EHCI implementations do this | |
1017 | * automatically, even if they _do_ support per-port | |
1018 | * power switching; they're allowed to just limit the | |
37ebb549 | 1019 | * current. hub_wq will turn the power back on. |
756aa6b3 | 1020 | */ |
e6604a7f CE |
1021 | if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
1022 | && HCS_PPC(ehci->hcs_params)) { | |
11a7e594 MG |
1023 | spin_unlock_irqrestore(&ehci->lock, flags); |
1024 | ehci_port_power(ehci, wIndex, false); | |
1025 | spin_lock_irqsave(&ehci->lock, flags); | |
81463c1d | 1026 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
1027 | } |
1028 | } | |
1029 | ||
6753f4cf AS |
1030 | /* no reset or resume pending */ |
1031 | if (!ehci->reset_done[wIndex]) { | |
629e4427 AS |
1032 | |
1033 | /* Remote Wakeup received? */ | |
6753f4cf | 1034 | if (temp & PORT_RESUME) { |
629e4427 AS |
1035 | /* resume signaling for 20 msec */ |
1036 | ehci->reset_done[wIndex] = jiffies | |
1037 | + msecs_to_jiffies(20); | |
f292e7f9 | 1038 | usb_hcd_start_port_resume(&hcd->self, wIndex); |
47a64a13 | 1039 | set_bit(wIndex, &ehci->resuming_ports); |
629e4427 AS |
1040 | /* check the port again */ |
1041 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
1042 | ehci->reset_done[wIndex]); | |
1043 | } | |
1da177e4 | 1044 | |
6753f4cf AS |
1045 | /* reset or resume not yet complete */ |
1046 | } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { | |
1047 | ; /* wait until it is complete */ | |
1048 | ||
1049 | /* resume completed */ | |
1050 | } else if (test_bit(wIndex, &ehci->resuming_ports)) { | |
1051 | clear_bit(wIndex, &ehci->suspended_ports); | |
1052 | set_bit(wIndex, &ehci->port_c_suspend); | |
1053 | ehci->reset_done[wIndex] = 0; | |
1054 | usb_hcd_end_port_resume(&hcd->self, wIndex); | |
1055 | ||
1056 | /* stop resume signaling */ | |
1057 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); | |
1058 | ehci_writel(ehci, temp, status_reg); | |
1059 | clear_bit(wIndex, &ehci->resuming_ports); | |
1060 | retval = ehci_handshake(ehci, status_reg, | |
1061 | PORT_RESUME, 0, 2000 /* 2msec */); | |
1062 | if (retval != 0) { | |
1063 | ehci_err(ehci, "port %d resume error %d\n", | |
629e4427 | 1064 | wIndex + 1, retval); |
6753f4cf | 1065 | goto error; |
1da177e4 | 1066 | } |
6753f4cf | 1067 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1068 | |
1069 | /* whoever resets must GetPortStatus to complete it!! */ | |
6753f4cf | 1070 | } else { |
749da5f8 | 1071 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 LT |
1072 | ehci->reset_done [wIndex] = 0; |
1073 | ||
1074 | /* force reset to complete */ | |
083522d7 | 1075 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 1076 | status_reg); |
c22fa3ac DB |
1077 | /* REVISIT: some hardware needs 550+ usec to clear |
1078 | * this bit; seems too long to spin routinely... | |
1079 | */ | |
2f3a6b86 | 1080 | retval = ehci_handshake(ehci, status_reg, |
6307e096 | 1081 | PORT_RESET, 0, 1000); |
1da177e4 LT |
1082 | if (retval != 0) { |
1083 | ehci_err (ehci, "port %d reset error %d\n", | |
1084 | wIndex + 1, retval); | |
1085 | goto error; | |
1086 | } | |
1087 | ||
1088 | /* see what we found out */ | |
e6316565 AS |
1089 | temp = check_reset_complete (ehci, wIndex, status_reg, |
1090 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
1091 | } |
1092 | ||
57e06c11 AS |
1093 | /* transfer dedicated ports to the companion hc */ |
1094 | if ((temp & PORT_CONNECT) && | |
1095 | test_bit(wIndex, &ehci->companion_ports)) { | |
1096 | temp &= ~PORT_RWC_BITS; | |
1097 | temp |= PORT_OWNER; | |
1098 | ehci_writel(ehci, temp, status_reg); | |
1099 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
1100 | temp = ehci_readl(ehci, status_reg); | |
1101 | } | |
1102 | ||
625b5c9a | 1103 | /* |
37ebb549 | 1104 | * Even if OWNER is set, there's no harm letting hub_wq |
625b5c9a AS |
1105 | * see the wPortStatus values (they should all be 0 except |
1106 | * for PORT_POWER anyway). | |
1107 | */ | |
1108 | ||
1109 | if (temp & PORT_CONNECT) { | |
749da5f8 | 1110 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 1111 | // status may be from integrated TT |
331ac6b2 AD |
1112 | if (ehci->has_hostpc) { |
1113 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1114 | status |= ehci_port_speed(ehci, temp1); | |
1115 | } else | |
1116 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 1117 | } |
625b5c9a | 1118 | if (temp & PORT_PE) |
749da5f8 | 1119 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
1120 | |
1121 | /* maybe the port was unsuspended without our knowledge */ | |
1122 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 1123 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
1124 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
1125 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 1126 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
1127 | ehci->reset_done[wIndex] = 0; |
1128 | if (temp & PORT_PE) | |
1129 | set_bit(wIndex, &ehci->port_c_suspend); | |
f292e7f9 | 1130 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
eafe5b99 AS |
1131 | } |
1132 | ||
625b5c9a | 1133 | if (temp & PORT_OC) |
749da5f8 | 1134 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 1135 | if (temp & PORT_RESET) |
749da5f8 | 1136 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 1137 | if (temp & PORT_POWER) |
749da5f8 | 1138 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 1139 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 1140 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 1141 | |
bbcd5cab ON |
1142 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
1143 | dbg_port(ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 1144 | put_unaligned_le32(status, buf); |
1da177e4 LT |
1145 | break; |
1146 | case SetHubFeature: | |
1147 | switch (wValue) { | |
1148 | case C_HUB_LOCAL_POWER: | |
1149 | case C_HUB_OVER_CURRENT: | |
1150 | /* no hub-wide feature/status flags */ | |
1151 | break; | |
1152 | default: | |
1153 | goto error; | |
1154 | } | |
1155 | break; | |
1156 | case SetPortFeature: | |
f0d7f273 DB |
1157 | selector = wIndex >> 8; |
1158 | wIndex &= 0xff; | |
8d053c79 JW |
1159 | if (unlikely(ehci->debug)) { |
1160 | /* If the debug port is active any port | |
1161 | * feature requests should get denied */ | |
1162 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
1163 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
1164 | retval = -ENODEV; | |
1165 | goto error_exit; | |
1166 | } | |
1167 | } | |
1da177e4 LT |
1168 | if (!wIndex || wIndex > ports) |
1169 | goto error; | |
1170 | wIndex--; | |
e6316565 | 1171 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1172 | if (temp & PORT_OWNER) |
1173 | break; | |
1174 | ||
10f6524a | 1175 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1176 | switch (wValue) { |
1177 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1178 | if (ehci->no_selective_suspend) |
1179 | break; | |
1da177e4 LT |
1180 | if ((temp & PORT_PE) == 0 |
1181 | || (temp & PORT_RESET) != 0) | |
1182 | goto error; | |
b9df7942 | 1183 | |
331ac6b2 AD |
1184 | /* After above check the port must be connected. |
1185 | * Set appropriate bit thus could put phy into low power | |
2cdcec4f | 1186 | * mode if we have tdi_phy_lpm feature |
331ac6b2 | 1187 | */ |
b9df7942 AD |
1188 | temp &= ~PORT_WKCONN_E; |
1189 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1190 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
2cdcec4f | 1191 | if (ehci->has_tdi_phy_lpm) { |
b9df7942 | 1192 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1193 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1194 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1195 | temp1 = ehci_readl(ehci, hostpc_reg); |
1196 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1197 | hostpc_reg); | |
1198 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1199 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1200 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1201 | "succeeded" : "failed"); | |
1202 | } | |
eafe5b99 | 1203 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1204 | break; |
1205 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
1206 | if (HCS_PPC(ehci->hcs_params)) { |
1207 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1208 | ehci_port_power(ehci, wIndex, true); | |
1209 | spin_lock_irqsave(&ehci->lock, flags); | |
1210 | } | |
1da177e4 LT |
1211 | break; |
1212 | case USB_PORT_FEAT_RESET: | |
6753f4cf | 1213 | if (temp & (PORT_SUSPEND|PORT_RESUME)) |
1da177e4 LT |
1214 | goto error; |
1215 | /* line status bits may report this as low speed, | |
1216 | * which can be fine if this root hub has a | |
1217 | * transaction translator built in. | |
1218 | */ | |
1219 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1220 | && !ehci_is_TDI(ehci) | |
1221 | && PORT_USB11 (temp)) { | |
1222 | ehci_dbg (ehci, | |
1223 | "port %d low speed --> companion\n", | |
1224 | wIndex + 1); | |
1225 | temp |= PORT_OWNER; | |
1226 | } else { | |
1da177e4 LT |
1227 | temp |= PORT_RESET; |
1228 | temp &= ~PORT_PE; | |
1229 | ||
1230 | /* | |
1231 | * caller must wait, then call GetPortStatus | |
1232 | * usb 2.0 spec says 50 ms resets on root | |
1233 | */ | |
1234 | ehci->reset_done [wIndex] = jiffies | |
1235 | + msecs_to_jiffies (50); | |
f8786a91 NB |
1236 | |
1237 | /* | |
1238 | * Force full-speed connect for FSL high-speed | |
1239 | * erratum; disable HS Chirp by setting PFSC bit | |
1240 | */ | |
1241 | if (ehci_has_fsl_hs_errata(ehci)) | |
1242 | temp |= (1 << PORTSC_FSL_PFSC); | |
1da177e4 | 1243 | } |
e6316565 | 1244 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1245 | break; |
f0d7f273 DB |
1246 | |
1247 | /* For downstream facing ports (these): one hub port is put | |
1248 | * into test mode according to USB2 11.24.2.13, then the hub | |
1249 | * must be reset (which for root hub now means rmmod+modprobe, | |
1250 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1251 | * about the EHCI-specific stuff. | |
1252 | */ | |
1253 | case USB_PORT_FEAT_TEST: | |
726a85ca | 1254 | #ifdef CONFIG_USB_HCD_TEST_MODE |
9841f37a MG |
1255 | if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
1256 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1257 | retval = ehset_single_step_set_feature(hcd, | |
5cbcc35e | 1258 | wIndex + 1); |
9841f37a MG |
1259 | spin_lock_irqsave(&ehci->lock, flags); |
1260 | break; | |
726a85ca JP |
1261 | } |
1262 | #endif | |
1263 | if (!selector || selector > 5) | |
f0d7f273 | 1264 | goto error; |
c4f34764 | 1265 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1266 | ehci_quiesce(ehci); |
c4f34764 | 1267 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
1268 | |
1269 | /* Put all enabled ports into suspend */ | |
1270 | while (ports--) { | |
1271 | u32 __iomem *sreg = | |
1272 | &ehci->regs->port_status[ports]; | |
1273 | ||
1274 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; | |
1275 | if (temp & PORT_PE) | |
1276 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1277 | sreg); | |
1278 | } | |
c4f34764 AS |
1279 | |
1280 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1281 | ehci_halt(ehci); |
c4f34764 AS |
1282 | spin_lock_irqsave(&ehci->lock, flags); |
1283 | ||
77636c86 | 1284 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1285 | temp |= selector << 16; |
e6316565 | 1286 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1287 | break; |
1288 | ||
1da177e4 LT |
1289 | default: |
1290 | goto error; | |
1291 | } | |
083522d7 | 1292 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1293 | break; |
1294 | ||
1295 | default: | |
1296 | error: | |
1297 | /* "stall" on error */ | |
1298 | retval = -EPIPE; | |
1299 | } | |
8d053c79 | 1300 | error_exit: |
1da177e4 LT |
1301 | spin_unlock_irqrestore (&ehci->lock, flags); |
1302 | return retval; | |
1303 | } | |
37769939 | 1304 | EXPORT_SYMBOL_GPL(ehci_hub_control); |
90da096e | 1305 | |
3e023203 | 1306 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
90da096e BR |
1307 | { |
1308 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1309 | ||
1310 | if (ehci_is_TDI(ehci)) | |
1311 | return; | |
1312 | set_owner(ehci, --portnum, PORT_OWNER); | |
1313 | } | |
1314 | ||
3e023203 | 1315 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
3a31155c AS |
1316 | { |
1317 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1318 | u32 __iomem *reg; | |
1319 | ||
1320 | if (ehci_is_TDI(ehci)) | |
1321 | return 0; | |
1322 | reg = &ehci->regs->port_status[portnum - 1]; | |
1323 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1324 | } | |
11a7e594 MG |
1325 | |
1326 | static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) | |
1327 | { | |
1328 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
1329 | u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; | |
1330 | u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; | |
1331 | ||
1332 | if (enable) | |
1333 | ehci_writel(ehci, temp | PORT_POWER, status_reg); | |
1334 | else | |
1335 | ehci_writel(ehci, temp & ~PORT_POWER, status_reg); | |
1336 | ||
1337 | if (hcd->driver->port_power) | |
1338 | hcd->driver->port_power(hcd, portnum, enable); | |
1339 | ||
1340 | return 0; | |
1341 | } |