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Commit | Line | Data |
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1da177e4 | 1 | /* |
d49d4317 | 2 | * Copyright (C) 2001-2004 by David Brownell |
53bd6a60 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* this file is part of ehci-hcd.c */ | |
20 | ||
21 | /*-------------------------------------------------------------------------*/ | |
22 | ||
23 | /* | |
24 | * EHCI Root Hub ... the nonsharable stuff | |
25 | * | |
26 | * Registers don't need cpu_to_le32, that happens transparently | |
27 | */ | |
28 | ||
29 | /*-------------------------------------------------------------------------*/ | |
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 | ||
9d4b8270 CH |
313 | if (changed && ehci_has_fsl_susp_errata(ehci)) |
314 | /* | |
315 | * Wait for at least 10 millisecondes to ensure the controller | |
316 | * enter the suspend status before initiating a port resume | |
317 | * using the Force Port Resume bit (Not-EHCI compatible). | |
318 | */ | |
319 | usleep_range(10000, 20000); | |
320 | ||
3e8d6d85 AS |
321 | if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { |
322 | /* | |
323 | * Wait for HCD to enter low-power mode or for the bus | |
324 | * to switch to full-speed idle. | |
325 | */ | |
326 | usleep_range(5000, 5500); | |
327 | } | |
331ac6b2 | 328 | |
2cdcec4f | 329 | if (changed && ehci->has_tdi_phy_lpm) { |
16032c4f | 330 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
331 | port = HCS_N_PORTS(ehci->hcs_params); |
332 | while (port--) { | |
a46af4eb | 333 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f AS |
334 | u32 t3; |
335 | ||
16032c4f AS |
336 | t3 = ehci_readl(ehci, hostpc_reg); |
337 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
338 | t3 = ehci_readl(ehci, hostpc_reg); | |
339 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
340 | port, (t3 & HOSTPC_PHCD) ? |
341 | "succeeded" : "failed"); | |
1da177e4 | 342 | } |
3e8d6d85 | 343 | spin_unlock_irq(&ehci->lock); |
1da177e4 LT |
344 | } |
345 | ||
cd930c93 AS |
346 | /* Apparently some devices need a >= 1-uframe delay here */ |
347 | if (ehci->bus_suspended) | |
348 | udelay(150); | |
349 | ||
1da177e4 LT |
350 | /* turn off now-idle HC */ |
351 | ehci_halt (ehci); | |
c4f34764 AS |
352 | |
353 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
354 | if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
355 | ehci_handle_controller_death(ehci); | |
356 | if (ehci->rh_state != EHCI_RH_RUNNING) | |
357 | goto done; | |
e8799906 | 358 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1da177e4 | 359 | |
8df0d77d AS |
360 | unlink_empty_async_suspended(ehci); |
361 | ||
f96fba0d AS |
362 | /* Any IAA cycle that started before the suspend is now invalid */ |
363 | end_iaa_cycle(ehci); | |
9118f9eb | 364 | ehci_handle_start_intr_unlinks(ehci); |
df202255 | 365 | ehci_handle_intr_unlinks(ehci); |
55934eb3 | 366 | end_free_itds(ehci); |
cdc647a9 | 367 | |
8c03356a AS |
368 | /* allow remote wakeup */ |
369 | mask = INTR_MASK; | |
58a97ffe | 370 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 371 | mask &= ~STS_PCD; |
083522d7 BH |
372 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
373 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 374 | |
43fe3a99 | 375 | done: |
1da177e4 | 376 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
d58b4bcc AS |
377 | ehci->enabled_hrtimer_events = 0; |
378 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
1da177e4 | 379 | spin_unlock_irq (&ehci->lock); |
015798b2 | 380 | |
d58b4bcc | 381 | hrtimer_cancel(&ehci->hrtimer); |
1da177e4 LT |
382 | return 0; |
383 | } | |
384 | ||
385 | ||
386 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 387 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
388 | { |
389 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
390 | u32 temp; | |
383975d7 | 391 | u32 power_okay; |
1da177e4 | 392 | int i; |
d0f2fb25 | 393 | unsigned long resume_needed = 0; |
1da177e4 LT |
394 | |
395 | if (time_before (jiffies, ehci->next_statechange)) | |
396 | msleep(5); | |
397 | spin_lock_irq (&ehci->lock); | |
43fe3a99 AS |
398 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
399 | goto shutdown; | |
1da177e4 | 400 | |
ad45f1dc | 401 | if (unlikely(ehci->debug)) { |
9fa5780b | 402 | if (!dbgp_reset_prep(hcd)) |
ad45f1dc JW |
403 | ehci->debug = NULL; |
404 | else | |
9fa5780b | 405 | dbgp_external_startup(hcd); |
ad45f1dc JW |
406 | } |
407 | ||
f03c17fc DB |
408 | /* Ideally and we've got a real resume here, and no port's power |
409 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
410 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
411 | * the last user of the controller, not reset/pm hardware keeping | |
412 | * state we gave to it. | |
413 | */ | |
383975d7 AS |
414 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
415 | ehci_dbg(ehci, "resume root hub%s\n", | |
416 | power_okay ? "" : " after power loss"); | |
f03c17fc | 417 | |
8c03356a AS |
418 | /* at least some APM implementations will try to deliver |
419 | * IRQs right away, so delay them until we're ready. | |
420 | */ | |
083522d7 | 421 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
422 | |
423 | /* re-init operational registers */ | |
083522d7 BH |
424 | ehci_writel(ehci, 0, &ehci->regs->segment); |
425 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
426 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
427 | |
428 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
3d9545cc | 429 | ehci->command |= CMD_RUN; |
083522d7 | 430 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
e8799906 | 431 | ehci->rh_state = EHCI_RH_RUNNING; |
1da177e4 | 432 | |
6273f181 PC |
433 | /* |
434 | * According to Bugzilla #8190, the port status for some controllers | |
435 | * will be wrong without a delay. At their wrong status, the port | |
436 | * is enabled, but not suspended neither resumed. | |
437 | */ | |
438 | i = HCS_N_PORTS(ehci->hcs_params); | |
439 | while (i--) { | |
440 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
441 | if ((temp & PORT_PE) && | |
442 | !(temp & (PORT_SUSPEND | PORT_RESUME))) { | |
443 | ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); | |
444 | spin_unlock_irq(&ehci->lock); | |
445 | msleep(8); | |
446 | spin_lock_irq(&ehci->lock); | |
447 | break; | |
448 | } | |
449 | } | |
450 | ||
43fe3a99 AS |
451 | if (ehci->shutdown) |
452 | goto shutdown; | |
e198a314 | 453 | |
16032c4f | 454 | /* clear phy low-power mode before resume */ |
2cdcec4f | 455 | if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { |
16032c4f AS |
456 | i = HCS_N_PORTS(ehci->hcs_params); |
457 | while (i--) { | |
458 | if (test_bit(i, &ehci->bus_suspended)) { | |
a46af4eb AS |
459 | u32 __iomem *hostpc_reg = |
460 | &ehci->regs->hostpc[i]; | |
16032c4f | 461 | |
16032c4f AS |
462 | temp = ehci_readl(ehci, hostpc_reg); |
463 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
464 | hostpc_reg); | |
465 | } | |
466 | } | |
467 | spin_unlock_irq(&ehci->lock); | |
468 | msleep(5); | |
469 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
470 | if (ehci->shutdown) |
471 | goto shutdown; | |
16032c4f AS |
472 | } |
473 | ||
8c03356a | 474 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
475 | i = HCS_N_PORTS (ehci->hcs_params); |
476 | while (i--) { | |
083522d7 | 477 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 478 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 479 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 480 | (temp & PORT_SUSPEND)) { |
1da177e4 | 481 | temp |= PORT_RESUME; |
d0f2fb25 | 482 | set_bit(i, &resume_needed); |
3a4e72cb | 483 | } |
083522d7 | 484 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 485 | } |
3a4e72cb | 486 | |
ea16328f FB |
487 | /* |
488 | * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume | |
489 | * port | |
490 | */ | |
3a4e72cb VP |
491 | if (resume_needed) { |
492 | spin_unlock_irq(&ehci->lock); | |
ea16328f | 493 | msleep(USB_RESUME_TIMEOUT); |
3a4e72cb | 494 | spin_lock_irq(&ehci->lock); |
43fe3a99 AS |
495 | if (ehci->shutdown) |
496 | goto shutdown; | |
3a4e72cb VP |
497 | } |
498 | ||
1da177e4 | 499 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 500 | while (i--) { |
083522d7 | 501 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
d0f2fb25 | 502 | if (test_bit(i, &resume_needed)) { |
24b90814 | 503 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
083522d7 | 504 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a | 505 | } |
1da177e4 | 506 | } |
1da177e4 LT |
507 | |
508 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
c4f34764 AS |
509 | spin_unlock_irq(&ehci->lock); |
510 | ||
511 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
512 | |
513 | /* Now we can safely re-enable irqs */ | |
43fe3a99 AS |
514 | spin_lock_irq(&ehci->lock); |
515 | if (ehci->shutdown) | |
516 | goto shutdown; | |
083522d7 | 517 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
15be105b | 518 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
43fe3a99 | 519 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 520 | |
1da177e4 | 521 | return 0; |
43fe3a99 AS |
522 | |
523 | shutdown: | |
524 | spin_unlock_irq(&ehci->lock); | |
525 | return -ESHUTDOWN; | |
1da177e4 LT |
526 | } |
527 | ||
528 | #else | |
529 | ||
0c0382e3 AS |
530 | #define ehci_bus_suspend NULL |
531 | #define ehci_bus_resume NULL | |
1da177e4 LT |
532 | |
533 | #endif /* CONFIG_PM */ | |
534 | ||
57e06c11 AS |
535 | /*-------------------------------------------------------------------------*/ |
536 | ||
57e06c11 | 537 | /* |
90da096e | 538 | * Sets the owner of a port |
57e06c11 | 539 | */ |
90da096e | 540 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 541 | { |
57e06c11 AS |
542 | u32 __iomem *status_reg; |
543 | u32 port_status; | |
90da096e | 544 | int try; |
57e06c11 | 545 | |
90da096e | 546 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
547 | |
548 | /* | |
549 | * The controller won't set the OWNER bit if the port is | |
550 | * enabled, so this loop will sometimes require at least two | |
551 | * iterations: one to disable the port and one to set OWNER. | |
552 | */ | |
57e06c11 AS |
553 | for (try = 4; try > 0; --try) { |
554 | spin_lock_irq(&ehci->lock); | |
555 | port_status = ehci_readl(ehci, status_reg); | |
556 | if ((port_status & PORT_OWNER) == new_owner | |
557 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
558 | == 0) | |
559 | try = 0; | |
560 | else { | |
561 | port_status ^= PORT_OWNER; | |
562 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
563 | ehci_writel(ehci, port_status, status_reg); | |
564 | } | |
565 | spin_unlock_irq(&ehci->lock); | |
566 | if (try > 1) | |
567 | msleep(5); | |
568 | } | |
90da096e BR |
569 | } |
570 | ||
1da177e4 LT |
571 | /*-------------------------------------------------------------------------*/ |
572 | ||
573 | static int check_reset_complete ( | |
574 | struct ehci_hcd *ehci, | |
575 | int index, | |
e6316565 | 576 | u32 __iomem *status_reg, |
1da177e4 LT |
577 | int port_status |
578 | ) { | |
cd4cdc93 | 579 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 580 | return port_status; |
1da177e4 LT |
581 | |
582 | /* if reset finished and it's still not enabled -- handoff */ | |
583 | if (!(port_status & PORT_PE)) { | |
584 | ||
585 | /* with integrated TT, there's nobody to hand it to! */ | |
586 | if (ehci_is_TDI(ehci)) { | |
587 | ehci_dbg (ehci, | |
588 | "Failed to enable port %d on root hub TT\n", | |
589 | index+1); | |
590 | return port_status; | |
591 | } | |
592 | ||
593 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
594 | index + 1); | |
595 | ||
596 | // what happens if HCS_N_CC(params) == 0 ? | |
597 | port_status |= PORT_OWNER; | |
10f6524a | 598 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 599 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 600 | |
796bcae7 VB |
601 | /* ensure 440EPX ohci controller state is operational */ |
602 | if (ehci->has_amcc_usb23) | |
603 | set_ohci_hcfs(ehci, 1); | |
604 | } else { | |
0ca7eb23 PC |
605 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
606 | index + 1); | |
796bcae7 VB |
607 | /* ensure 440EPx ohci controller state is suspended */ |
608 | if (ehci->has_amcc_usb23) | |
609 | set_ohci_hcfs(ehci, 0); | |
610 | } | |
1da177e4 LT |
611 | |
612 | return port_status; | |
613 | } | |
614 | ||
615 | /*-------------------------------------------------------------------------*/ | |
616 | ||
617 | ||
618 | /* build "status change" packet (one or two bytes) from HC registers */ | |
619 | ||
620 | static int | |
621 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
622 | { | |
623 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
a448e4dc | 624 | u32 temp, status; |
93f1a47c | 625 | u32 mask; |
1da177e4 LT |
626 | int ports, i, retval = 1; |
627 | unsigned long flags; | |
4dd405a4 | 628 | u32 ppcd = ~0; |
1da177e4 | 629 | |
1da177e4 LT |
630 | /* init status to no-changes */ |
631 | buf [0] = 0; | |
632 | ports = HCS_N_PORTS (ehci->hcs_params); | |
633 | if (ports > 7) { | |
634 | buf [1] = 0; | |
635 | retval++; | |
636 | } | |
53bd6a60 | 637 | |
a448e4dc AS |
638 | /* Inform the core about resumes-in-progress by returning |
639 | * a non-zero value even if there are no status changes. | |
640 | */ | |
641 | status = ehci->resuming_ports; | |
642 | ||
93f1a47c DB |
643 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
644 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 645 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
646 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
647 | * PORT_POWER; that's surprising, but maybe within-spec. | |
648 | */ | |
649 | if (!ignore_oc) | |
650 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
651 | else | |
652 | mask = PORT_CSC | PORT_PEC; | |
653 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
654 | ||
1da177e4 LT |
655 | /* no hub change reports (bit 0) for now (power, ...) */ |
656 | ||
657 | /* port N changes (bit N)? */ | |
658 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
659 | |
660 | /* get per-port change detect bits */ | |
661 | if (ehci->has_ppcd) | |
662 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
663 | ||
1da177e4 | 664 | for (i = 0; i < ports; i++) { |
5a9cdf33 | 665 | /* leverage per-port change bits feature */ |
4dd405a4 AS |
666 | if (ppcd & (1 << i)) |
667 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
668 | else | |
669 | temp = 0; | |
625b5c9a AS |
670 | |
671 | /* | |
672 | * Return status information even for ports with OWNER set. | |
37ebb549 | 673 | * Otherwise hub_wq wouldn't see the disconnect event when a |
625b5c9a AS |
674 | * high-speed device is switched over to the companion |
675 | * controller by the user. | |
676 | */ | |
677 | ||
eafe5b99 AS |
678 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
679 | || (ehci->reset_done[i] && time_after_eq( | |
680 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
681 | if (i < 7) |
682 | buf [0] |= 1 << (i + 1); | |
683 | else | |
684 | buf [1] |= 1 << (i - 7); | |
685 | status = STS_PCD; | |
686 | } | |
687 | } | |
ee74290b AS |
688 | |
689 | /* If a resume is in progress, make sure it can finish */ | |
690 | if (ehci->resuming_ports) | |
691 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); | |
692 | ||
1da177e4 LT |
693 | spin_unlock_irqrestore (&ehci->lock, flags); |
694 | return status ? retval : 0; | |
695 | } | |
696 | ||
697 | /*-------------------------------------------------------------------------*/ | |
698 | ||
699 | static void | |
700 | ehci_hub_descriptor ( | |
701 | struct ehci_hcd *ehci, | |
702 | struct usb_hub_descriptor *desc | |
703 | ) { | |
704 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
705 | u16 temp; | |
706 | ||
625a4c59 | 707 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 LT |
708 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ |
709 | desc->bHubContrCurrent = 0; | |
710 | ||
711 | desc->bNbrPorts = ports; | |
712 | temp = 1 + (ports / 8); | |
713 | desc->bDescLength = 7 + 2 * temp; | |
714 | ||
715 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
716 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
717 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 | 718 | |
3a2359ee | 719 | temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ |
1da177e4 | 720 | if (HCS_PPC (ehci->hcs_params)) |
3a2359ee | 721 | temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ |
56c1e26d | 722 | else |
3a2359ee | 723 | temp |= HUB_CHAR_NO_LPSM; /* no power switching */ |
1da177e4 LT |
724 | #if 0 |
725 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
726 | if (HCS_INDICATOR (ehci->hcs_params)) | |
3a2359ee | 727 | temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ |
1da177e4 | 728 | #endif |
fd05e720 | 729 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
730 | } |
731 | ||
9841f37a | 732 | /*-------------------------------------------------------------------------*/ |
726a85ca JP |
733 | #ifdef CONFIG_USB_HCD_TEST_MODE |
734 | ||
9841f37a MG |
735 | #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06 |
736 | ||
737 | static void usb_ehset_completion(struct urb *urb) | |
738 | { | |
739 | struct completion *done = urb->context; | |
740 | ||
741 | complete(done); | |
742 | } | |
743 | static int submit_single_step_set_feature( | |
744 | struct usb_hcd *hcd, | |
745 | struct urb *urb, | |
746 | int is_setup | |
747 | ); | |
748 | ||
749 | /* | |
750 | * Allocate and initialize a control URB. This request will be used by the | |
751 | * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages | |
752 | * of the GetDescriptor request are sent 15 seconds after the SETUP stage. | |
753 | * Return NULL if failed. | |
754 | */ | |
755 | static struct urb *request_single_step_set_feature_urb( | |
756 | struct usb_device *udev, | |
757 | void *dr, | |
758 | void *buf, | |
759 | struct completion *done | |
760 | ) { | |
761 | struct urb *urb; | |
762 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
763 | struct usb_host_endpoint *ep; | |
764 | ||
765 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
766 | if (!urb) | |
767 | return NULL; | |
768 | ||
769 | urb->pipe = usb_rcvctrlpipe(udev, 0); | |
770 | ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out) | |
771 | [usb_pipeendpoint(urb->pipe)]; | |
772 | if (!ep) { | |
773 | usb_free_urb(urb); | |
774 | return NULL; | |
775 | } | |
776 | ||
777 | urb->ep = ep; | |
778 | urb->dev = udev; | |
779 | urb->setup_packet = (void *)dr; | |
780 | urb->transfer_buffer = buf; | |
781 | urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; | |
782 | urb->complete = usb_ehset_completion; | |
783 | urb->status = -EINPROGRESS; | |
784 | urb->actual_length = 0; | |
785 | urb->transfer_flags = URB_DIR_IN; | |
786 | usb_get_urb(urb); | |
787 | atomic_inc(&urb->use_count); | |
788 | atomic_inc(&urb->dev->urbnum); | |
789 | urb->setup_dma = dma_map_single( | |
790 | hcd->self.controller, | |
791 | urb->setup_packet, | |
792 | sizeof(struct usb_ctrlrequest), | |
793 | DMA_TO_DEVICE); | |
794 | urb->transfer_dma = dma_map_single( | |
795 | hcd->self.controller, | |
796 | urb->transfer_buffer, | |
797 | urb->transfer_buffer_length, | |
798 | DMA_FROM_DEVICE); | |
799 | urb->context = done; | |
800 | return urb; | |
801 | } | |
802 | ||
803 | static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) | |
804 | { | |
805 | int retval = -ENOMEM; | |
806 | struct usb_ctrlrequest *dr; | |
807 | struct urb *urb; | |
808 | struct usb_device *udev; | |
809 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
810 | struct usb_device_descriptor *buf; | |
811 | DECLARE_COMPLETION_ONSTACK(done); | |
812 | ||
813 | /* Obtain udev of the rhub's child port */ | |
814 | udev = usb_hub_find_child(hcd->self.root_hub, port); | |
815 | if (!udev) { | |
816 | ehci_err(ehci, "No device attached to the RootHub\n"); | |
817 | return -ENODEV; | |
818 | } | |
819 | buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); | |
820 | if (!buf) | |
821 | return -ENOMEM; | |
822 | ||
823 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | |
824 | if (!dr) { | |
825 | kfree(buf); | |
826 | return -ENOMEM; | |
827 | } | |
828 | ||
829 | /* Fill Setup packet for GetDescriptor */ | |
830 | dr->bRequestType = USB_DIR_IN; | |
831 | dr->bRequest = USB_REQ_GET_DESCRIPTOR; | |
832 | dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); | |
833 | dr->wIndex = 0; | |
834 | dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); | |
835 | urb = request_single_step_set_feature_urb(udev, dr, buf, &done); | |
836 | if (!urb) | |
837 | goto cleanup; | |
838 | ||
839 | /* Submit just the SETUP stage */ | |
840 | retval = submit_single_step_set_feature(hcd, urb, 1); | |
841 | if (retval) | |
842 | goto out1; | |
843 | if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { | |
844 | usb_kill_urb(urb); | |
845 | retval = -ETIMEDOUT; | |
846 | ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__); | |
847 | goto out1; | |
848 | } | |
849 | msleep(15 * 1000); | |
850 | ||
851 | /* Complete remaining DATA and STATUS stages using the same URB */ | |
852 | urb->status = -EINPROGRESS; | |
853 | usb_get_urb(urb); | |
854 | atomic_inc(&urb->use_count); | |
855 | atomic_inc(&urb->dev->urbnum); | |
856 | retval = submit_single_step_set_feature(hcd, urb, 0); | |
857 | if (!retval && !wait_for_completion_timeout(&done, | |
858 | msecs_to_jiffies(2000))) { | |
859 | usb_kill_urb(urb); | |
860 | retval = -ETIMEDOUT; | |
861 | ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__); | |
862 | } | |
863 | out1: | |
864 | usb_free_urb(urb); | |
865 | cleanup: | |
866 | kfree(dr); | |
867 | kfree(buf); | |
868 | return retval; | |
869 | } | |
726a85ca | 870 | #endif /* CONFIG_USB_HCD_TEST_MODE */ |
1da177e4 LT |
871 | /*-------------------------------------------------------------------------*/ |
872 | ||
37769939 | 873 | int ehci_hub_control( |
1da177e4 LT |
874 | struct usb_hcd *hcd, |
875 | u16 typeReq, | |
876 | u16 wValue, | |
877 | u16 wIndex, | |
878 | char *buf, | |
879 | u16 wLength | |
880 | ) { | |
881 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
882 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
85e3990b | 883 | u32 __iomem *status_reg, *hostpc_reg; |
331ac6b2 | 884 | u32 temp, temp1, status; |
1da177e4 LT |
885 | unsigned long flags; |
886 | int retval = 0; | |
f0d7f273 | 887 | unsigned selector; |
1da177e4 | 888 | |
85e3990b AS |
889 | /* |
890 | * Avoid underflow while calculating (wIndex & 0xff) - 1. | |
891 | * The compiler might deduce that wIndex can never be 0 and then | |
892 | * optimize away the tests for !wIndex below. | |
893 | */ | |
894 | temp = wIndex & 0xff; | |
895 | temp -= (temp > 0); | |
896 | status_reg = &ehci->regs->port_status[temp]; | |
897 | hostpc_reg = &ehci->regs->hostpc[temp]; | |
898 | ||
1da177e4 LT |
899 | /* |
900 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
901 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
902 | * (track current state ourselves) ... blink for diagnostics, | |
903 | * power, "this is the one", etc. EHCI spec supports this. | |
904 | */ | |
905 | ||
906 | spin_lock_irqsave (&ehci->lock, flags); | |
907 | switch (typeReq) { | |
908 | case ClearHubFeature: | |
909 | switch (wValue) { | |
910 | case C_HUB_LOCAL_POWER: | |
911 | case C_HUB_OVER_CURRENT: | |
912 | /* no hub-wide feature/status flags */ | |
913 | break; | |
914 | default: | |
915 | goto error; | |
916 | } | |
917 | break; | |
918 | case ClearPortFeature: | |
919 | if (!wIndex || wIndex > ports) | |
920 | goto error; | |
921 | wIndex--; | |
e6316565 | 922 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 923 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
924 | |
925 | /* | |
926 | * Even if OWNER is set, so the port is owned by the | |
37ebb549 | 927 | * companion controller, hub_wq needs to be able to clear |
625b5c9a | 928 | * the port-change status bits (especially |
749da5f8 | 929 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 930 | */ |
1da177e4 LT |
931 | |
932 | switch (wValue) { | |
933 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 934 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
935 | break; |
936 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 937 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
938 | break; |
939 | case USB_PORT_FEAT_SUSPEND: | |
940 | if (temp & PORT_RESET) | |
941 | goto error; | |
f8aeb3bb DB |
942 | if (ehci->no_selective_suspend) |
943 | break; | |
83722bc9 AG |
944 | #ifdef CONFIG_USB_OTG |
945 | if ((hcd->self.otg_port == (wIndex + 1)) | |
946 | && hcd->self.b_hnp_enable) { | |
3d46e73d | 947 | otg_start_hnp(hcd->usb_phy->otg); |
83722bc9 AG |
948 | break; |
949 | } | |
950 | #endif | |
16032c4f AS |
951 | if (!(temp & PORT_SUSPEND)) |
952 | break; | |
953 | if ((temp & PORT_PE) == 0) | |
954 | goto error; | |
955 | ||
956 | /* clear phy low-power mode before resume */ | |
2cdcec4f | 957 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
958 | temp1 = ehci_readl(ehci, hostpc_reg); |
959 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 960 | hostpc_reg); |
16032c4f AS |
961 | spin_unlock_irqrestore(&ehci->lock, flags); |
962 | msleep(5);/* wait to leave low-power mode */ | |
963 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 964 | } |
16032c4f | 965 | /* resume signaling for 20 msec */ |
6d5f89c7 | 966 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
967 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
968 | ehci->reset_done[wIndex] = jiffies | |
ea16328f | 969 | + msecs_to_jiffies(USB_RESUME_TIMEOUT); |
3a20446f AS |
970 | set_bit(wIndex, &ehci->resuming_ports); |
971 | usb_hcd_start_port_resume(&hcd->self, wIndex); | |
1da177e4 LT |
972 | break; |
973 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 974 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
975 | break; |
976 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
977 | if (HCS_PPC(ehci->hcs_params)) { |
978 | spin_unlock_irqrestore(&ehci->lock, flags); | |
979 | ehci_port_power(ehci, wIndex, false); | |
980 | spin_lock_irqsave(&ehci->lock, flags); | |
981 | } | |
1da177e4 LT |
982 | break; |
983 | case USB_PORT_FEAT_C_CONNECTION: | |
6d5f89c7 | 984 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
985 | break; |
986 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 987 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
988 | break; |
989 | case USB_PORT_FEAT_C_RESET: | |
990 | /* GetPortStatus clears reset */ | |
991 | break; | |
992 | default: | |
993 | goto error; | |
994 | } | |
083522d7 | 995 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
996 | break; |
997 | case GetHubDescriptor: | |
998 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
999 | buf); | |
1000 | break; | |
1001 | case GetHubStatus: | |
1002 | /* no hub-wide feature/status flags */ | |
1003 | memset (buf, 0, 4); | |
1004 | //cpu_to_le32s ((u32 *) buf); | |
1005 | break; | |
1006 | case GetPortStatus: | |
1007 | if (!wIndex || wIndex > ports) | |
1008 | goto error; | |
1009 | wIndex--; | |
1010 | status = 0; | |
e6316565 | 1011 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1012 | |
1013 | // wPortChange bits | |
1014 | if (temp & PORT_CSC) | |
749da5f8 | 1015 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 1016 | if (temp & PORT_PEC) |
749da5f8 | 1017 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
1018 | |
1019 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 1020 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 1021 | |
756aa6b3 CE |
1022 | /* |
1023 | * Hubs should disable port power on over-current. | |
1024 | * However, not all EHCI implementations do this | |
1025 | * automatically, even if they _do_ support per-port | |
1026 | * power switching; they're allowed to just limit the | |
37ebb549 | 1027 | * current. hub_wq will turn the power back on. |
756aa6b3 | 1028 | */ |
e6604a7f CE |
1029 | if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
1030 | && HCS_PPC(ehci->hcs_params)) { | |
11a7e594 MG |
1031 | spin_unlock_irqrestore(&ehci->lock, flags); |
1032 | ehci_port_power(ehci, wIndex, false); | |
1033 | spin_lock_irqsave(&ehci->lock, flags); | |
81463c1d | 1034 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
1035 | } |
1036 | } | |
1037 | ||
6753f4cf AS |
1038 | /* no reset or resume pending */ |
1039 | if (!ehci->reset_done[wIndex]) { | |
629e4427 AS |
1040 | |
1041 | /* Remote Wakeup received? */ | |
6753f4cf | 1042 | if (temp & PORT_RESUME) { |
629e4427 AS |
1043 | /* resume signaling for 20 msec */ |
1044 | ehci->reset_done[wIndex] = jiffies | |
1045 | + msecs_to_jiffies(20); | |
f292e7f9 | 1046 | usb_hcd_start_port_resume(&hcd->self, wIndex); |
47a64a13 | 1047 | set_bit(wIndex, &ehci->resuming_ports); |
629e4427 AS |
1048 | /* check the port again */ |
1049 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
1050 | ehci->reset_done[wIndex]); | |
1051 | } | |
1da177e4 | 1052 | |
6753f4cf AS |
1053 | /* reset or resume not yet complete */ |
1054 | } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { | |
1055 | ; /* wait until it is complete */ | |
1056 | ||
1057 | /* resume completed */ | |
1058 | } else if (test_bit(wIndex, &ehci->resuming_ports)) { | |
1059 | clear_bit(wIndex, &ehci->suspended_ports); | |
1060 | set_bit(wIndex, &ehci->port_c_suspend); | |
1061 | ehci->reset_done[wIndex] = 0; | |
1062 | usb_hcd_end_port_resume(&hcd->self, wIndex); | |
1063 | ||
1064 | /* stop resume signaling */ | |
1065 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); | |
1066 | ehci_writel(ehci, temp, status_reg); | |
1067 | clear_bit(wIndex, &ehci->resuming_ports); | |
1068 | retval = ehci_handshake(ehci, status_reg, | |
1069 | PORT_RESUME, 0, 2000 /* 2msec */); | |
1070 | if (retval != 0) { | |
1071 | ehci_err(ehci, "port %d resume error %d\n", | |
629e4427 | 1072 | wIndex + 1, retval); |
6753f4cf | 1073 | goto error; |
1da177e4 | 1074 | } |
6753f4cf | 1075 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1076 | |
1077 | /* whoever resets must GetPortStatus to complete it!! */ | |
6753f4cf | 1078 | } else { |
749da5f8 | 1079 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 LT |
1080 | ehci->reset_done [wIndex] = 0; |
1081 | ||
1082 | /* force reset to complete */ | |
083522d7 | 1083 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 1084 | status_reg); |
c22fa3ac DB |
1085 | /* REVISIT: some hardware needs 550+ usec to clear |
1086 | * this bit; seems too long to spin routinely... | |
1087 | */ | |
2f3a6b86 | 1088 | retval = ehci_handshake(ehci, status_reg, |
6307e096 | 1089 | PORT_RESET, 0, 1000); |
1da177e4 LT |
1090 | if (retval != 0) { |
1091 | ehci_err (ehci, "port %d reset error %d\n", | |
1092 | wIndex + 1, retval); | |
1093 | goto error; | |
1094 | } | |
1095 | ||
1096 | /* see what we found out */ | |
e6316565 AS |
1097 | temp = check_reset_complete (ehci, wIndex, status_reg, |
1098 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
1099 | } |
1100 | ||
57e06c11 AS |
1101 | /* transfer dedicated ports to the companion hc */ |
1102 | if ((temp & PORT_CONNECT) && | |
1103 | test_bit(wIndex, &ehci->companion_ports)) { | |
1104 | temp &= ~PORT_RWC_BITS; | |
1105 | temp |= PORT_OWNER; | |
1106 | ehci_writel(ehci, temp, status_reg); | |
1107 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
1108 | temp = ehci_readl(ehci, status_reg); | |
1109 | } | |
1110 | ||
625b5c9a | 1111 | /* |
37ebb549 | 1112 | * Even if OWNER is set, there's no harm letting hub_wq |
625b5c9a AS |
1113 | * see the wPortStatus values (they should all be 0 except |
1114 | * for PORT_POWER anyway). | |
1115 | */ | |
1116 | ||
1117 | if (temp & PORT_CONNECT) { | |
749da5f8 | 1118 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 1119 | // status may be from integrated TT |
331ac6b2 AD |
1120 | if (ehci->has_hostpc) { |
1121 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1122 | status |= ehci_port_speed(ehci, temp1); | |
1123 | } else | |
1124 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 1125 | } |
625b5c9a | 1126 | if (temp & PORT_PE) |
749da5f8 | 1127 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
1128 | |
1129 | /* maybe the port was unsuspended without our knowledge */ | |
1130 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 1131 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
1132 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
1133 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 1134 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
1135 | ehci->reset_done[wIndex] = 0; |
1136 | if (temp & PORT_PE) | |
1137 | set_bit(wIndex, &ehci->port_c_suspend); | |
f292e7f9 | 1138 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
eafe5b99 AS |
1139 | } |
1140 | ||
625b5c9a | 1141 | if (temp & PORT_OC) |
749da5f8 | 1142 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 1143 | if (temp & PORT_RESET) |
749da5f8 | 1144 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 1145 | if (temp & PORT_POWER) |
749da5f8 | 1146 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 1147 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 1148 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 1149 | |
bbcd5cab ON |
1150 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
1151 | dbg_port(ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 1152 | put_unaligned_le32(status, buf); |
1da177e4 LT |
1153 | break; |
1154 | case SetHubFeature: | |
1155 | switch (wValue) { | |
1156 | case C_HUB_LOCAL_POWER: | |
1157 | case C_HUB_OVER_CURRENT: | |
1158 | /* no hub-wide feature/status flags */ | |
1159 | break; | |
1160 | default: | |
1161 | goto error; | |
1162 | } | |
1163 | break; | |
1164 | case SetPortFeature: | |
f0d7f273 DB |
1165 | selector = wIndex >> 8; |
1166 | wIndex &= 0xff; | |
8d053c79 JW |
1167 | if (unlikely(ehci->debug)) { |
1168 | /* If the debug port is active any port | |
1169 | * feature requests should get denied */ | |
1170 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
1171 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
1172 | retval = -ENODEV; | |
1173 | goto error_exit; | |
1174 | } | |
1175 | } | |
1da177e4 LT |
1176 | if (!wIndex || wIndex > ports) |
1177 | goto error; | |
1178 | wIndex--; | |
e6316565 | 1179 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1180 | if (temp & PORT_OWNER) |
1181 | break; | |
1182 | ||
10f6524a | 1183 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1184 | switch (wValue) { |
1185 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1186 | if (ehci->no_selective_suspend) |
1187 | break; | |
1da177e4 LT |
1188 | if ((temp & PORT_PE) == 0 |
1189 | || (temp & PORT_RESET) != 0) | |
1190 | goto error; | |
b9df7942 | 1191 | |
331ac6b2 AD |
1192 | /* After above check the port must be connected. |
1193 | * Set appropriate bit thus could put phy into low power | |
2cdcec4f | 1194 | * mode if we have tdi_phy_lpm feature |
331ac6b2 | 1195 | */ |
b9df7942 AD |
1196 | temp &= ~PORT_WKCONN_E; |
1197 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1198 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
2cdcec4f | 1199 | if (ehci->has_tdi_phy_lpm) { |
b9df7942 | 1200 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1201 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1202 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1203 | temp1 = ehci_readl(ehci, hostpc_reg); |
1204 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1205 | hostpc_reg); | |
1206 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1207 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1208 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1209 | "succeeded" : "failed"); | |
1210 | } | |
9d4b8270 CH |
1211 | if (ehci_has_fsl_susp_errata(ehci)) { |
1212 | /* 10ms for HCD enter suspend */ | |
1213 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1214 | usleep_range(10000, 20000); | |
1215 | spin_lock_irqsave(&ehci->lock, flags); | |
1216 | } | |
eafe5b99 | 1217 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1218 | break; |
1219 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
1220 | if (HCS_PPC(ehci->hcs_params)) { |
1221 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1222 | ehci_port_power(ehci, wIndex, true); | |
1223 | spin_lock_irqsave(&ehci->lock, flags); | |
1224 | } | |
1da177e4 LT |
1225 | break; |
1226 | case USB_PORT_FEAT_RESET: | |
6753f4cf | 1227 | if (temp & (PORT_SUSPEND|PORT_RESUME)) |
1da177e4 LT |
1228 | goto error; |
1229 | /* line status bits may report this as low speed, | |
1230 | * which can be fine if this root hub has a | |
1231 | * transaction translator built in. | |
1232 | */ | |
1233 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1234 | && !ehci_is_TDI(ehci) | |
1235 | && PORT_USB11 (temp)) { | |
1236 | ehci_dbg (ehci, | |
1237 | "port %d low speed --> companion\n", | |
1238 | wIndex + 1); | |
1239 | temp |= PORT_OWNER; | |
1240 | } else { | |
1da177e4 LT |
1241 | temp |= PORT_RESET; |
1242 | temp &= ~PORT_PE; | |
1243 | ||
1244 | /* | |
1245 | * caller must wait, then call GetPortStatus | |
1246 | * usb 2.0 spec says 50 ms resets on root | |
1247 | */ | |
1248 | ehci->reset_done [wIndex] = jiffies | |
1249 | + msecs_to_jiffies (50); | |
f8786a91 NB |
1250 | |
1251 | /* | |
1252 | * Force full-speed connect for FSL high-speed | |
1253 | * erratum; disable HS Chirp by setting PFSC bit | |
1254 | */ | |
1255 | if (ehci_has_fsl_hs_errata(ehci)) | |
1256 | temp |= (1 << PORTSC_FSL_PFSC); | |
1da177e4 | 1257 | } |
e6316565 | 1258 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1259 | break; |
f0d7f273 DB |
1260 | |
1261 | /* For downstream facing ports (these): one hub port is put | |
1262 | * into test mode according to USB2 11.24.2.13, then the hub | |
1263 | * must be reset (which for root hub now means rmmod+modprobe, | |
1264 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1265 | * about the EHCI-specific stuff. | |
1266 | */ | |
1267 | case USB_PORT_FEAT_TEST: | |
726a85ca | 1268 | #ifdef CONFIG_USB_HCD_TEST_MODE |
9841f37a MG |
1269 | if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
1270 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1271 | retval = ehset_single_step_set_feature(hcd, | |
5cbcc35e | 1272 | wIndex + 1); |
9841f37a MG |
1273 | spin_lock_irqsave(&ehci->lock, flags); |
1274 | break; | |
726a85ca JP |
1275 | } |
1276 | #endif | |
1277 | if (!selector || selector > 5) | |
f0d7f273 | 1278 | goto error; |
c4f34764 | 1279 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1280 | ehci_quiesce(ehci); |
c4f34764 | 1281 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
1282 | |
1283 | /* Put all enabled ports into suspend */ | |
1284 | while (ports--) { | |
1285 | u32 __iomem *sreg = | |
1286 | &ehci->regs->port_status[ports]; | |
1287 | ||
1288 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; | |
1289 | if (temp & PORT_PE) | |
1290 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1291 | sreg); | |
1292 | } | |
c4f34764 AS |
1293 | |
1294 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1295 | ehci_halt(ehci); |
c4f34764 AS |
1296 | spin_lock_irqsave(&ehci->lock, flags); |
1297 | ||
77636c86 | 1298 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1299 | temp |= selector << 16; |
e6316565 | 1300 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1301 | break; |
1302 | ||
1da177e4 LT |
1303 | default: |
1304 | goto error; | |
1305 | } | |
083522d7 | 1306 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1307 | break; |
1308 | ||
1309 | default: | |
1310 | error: | |
1311 | /* "stall" on error */ | |
1312 | retval = -EPIPE; | |
1313 | } | |
8d053c79 | 1314 | error_exit: |
1da177e4 LT |
1315 | spin_unlock_irqrestore (&ehci->lock, flags); |
1316 | return retval; | |
1317 | } | |
37769939 | 1318 | EXPORT_SYMBOL_GPL(ehci_hub_control); |
90da096e | 1319 | |
3e023203 | 1320 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
90da096e BR |
1321 | { |
1322 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1323 | ||
1324 | if (ehci_is_TDI(ehci)) | |
1325 | return; | |
1326 | set_owner(ehci, --portnum, PORT_OWNER); | |
1327 | } | |
1328 | ||
3e023203 | 1329 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
3a31155c AS |
1330 | { |
1331 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1332 | u32 __iomem *reg; | |
1333 | ||
1334 | if (ehci_is_TDI(ehci)) | |
1335 | return 0; | |
1336 | reg = &ehci->regs->port_status[portnum - 1]; | |
1337 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1338 | } | |
11a7e594 MG |
1339 | |
1340 | static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) | |
1341 | { | |
1342 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
1343 | u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; | |
1344 | u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; | |
1345 | ||
1346 | if (enable) | |
1347 | ehci_writel(ehci, temp | PORT_POWER, status_reg); | |
1348 | else | |
1349 | ehci_writel(ehci, temp & ~PORT_POWER, status_reg); | |
1350 | ||
1351 | if (hcd->driver->port_power) | |
1352 | hcd->driver->port_power(hcd, portnum, enable); | |
1353 | ||
1354 | return 0; | |
1355 | } |