Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 | 2 | /* |
d49d4317 | 3 | * Copyright (C) 2001-2004 by David Brownell |
1da177e4 LT |
4 | */ |
5 | ||
6 | /* this file is part of ehci-hcd.c */ | |
7 | ||
8 | /*-------------------------------------------------------------------------*/ | |
9 | ||
10 | /* | |
11 | * EHCI Root Hub ... the nonsharable stuff | |
12 | * | |
13 | * Registers don't need cpu_to_le32, that happens transparently | |
14 | */ | |
15 | ||
16 | /*-------------------------------------------------------------------------*/ | |
83722bc9 | 17 | #include <linux/usb/otg.h> |
1da177e4 | 18 | |
58a97ffe AS |
19 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
20 | ||
aff6d18f AS |
21 | #ifdef CONFIG_PM |
22 | ||
1586ba0c AS |
23 | static void unlink_empty_async_suspended(struct ehci_hcd *ehci); |
24 | ||
9b790915 JW |
25 | static int persist_enabled_on_companion(struct usb_device *udev, void *unused) |
26 | { | |
27 | return !udev->maxchild && udev->persist_enabled && | |
28 | udev->bus->root_hub->speed < USB_SPEED_HIGH; | |
29 | } | |
30 | ||
383975d7 AS |
31 | /* After a power loss, ports that were owned by the companion must be |
32 | * reset so that the companion can still own them. | |
33 | */ | |
34 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
35 | { | |
36 | u32 __iomem *reg; | |
37 | u32 status; | |
38 | int port; | |
39 | __le32 buf; | |
40 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
41 | ||
42 | if (!ehci->owned_ports) | |
43 | return; | |
44 | ||
9b790915 JW |
45 | /* |
46 | * USB 1.1 devices are mostly HIDs, which don't need to persist across | |
47 | * suspends. If we ensure that none of our companion's devices have | |
48 | * persist_enabled (by looking through all USB 1.1 buses in the system), | |
49 | * we can skip this and avoid slowing resume down. Devices without | |
50 | * persist will just get reenumerated shortly after resume anyway. | |
51 | */ | |
52 | if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) | |
53 | return; | |
54 | ||
c73cee71 AS |
55 | /* Make sure the ports are powered */ |
56 | port = HCS_N_PORTS(ehci->hcs_params); | |
57 | while (port--) { | |
58 | if (test_bit(port, &ehci->owned_ports)) { | |
59 | reg = &ehci->regs->port_status[port]; | |
60 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
11a7e594 MG |
61 | if (!(status & PORT_POWER)) |
62 | ehci_port_power(ehci, port, true); | |
c73cee71 AS |
63 | } |
64 | } | |
65 | ||
383975d7 AS |
66 | /* Give the connections some time to appear */ |
67 | msleep(20); | |
68 | ||
c4f34764 | 69 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
70 | port = HCS_N_PORTS(ehci->hcs_params); |
71 | while (port--) { | |
72 | if (test_bit(port, &ehci->owned_ports)) { | |
73 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 74 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
75 | |
76 | /* Port already owned by companion? */ | |
77 | if (status & PORT_OWNER) | |
78 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
79 | else if (test_bit(port, &ehci->companion_ports)) |
80 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
c4f34764 AS |
81 | else { |
82 | spin_unlock_irq(&ehci->lock); | |
383975d7 AS |
83 | ehci_hub_control(hcd, SetPortFeature, |
84 | USB_PORT_FEAT_RESET, port + 1, | |
85 | NULL, 0); | |
c4f34764 AS |
86 | spin_lock_irq(&ehci->lock); |
87 | } | |
383975d7 AS |
88 | } |
89 | } | |
c4f34764 | 90 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
91 | |
92 | if (!ehci->owned_ports) | |
93 | return; | |
94 | msleep(90); /* Wait for resets to complete */ | |
95 | ||
c4f34764 | 96 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
97 | port = HCS_N_PORTS(ehci->hcs_params); |
98 | while (port--) { | |
99 | if (test_bit(port, &ehci->owned_ports)) { | |
c4f34764 | 100 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
101 | ehci_hub_control(hcd, GetPortStatus, |
102 | 0, port + 1, | |
103 | (char *) &buf, sizeof(buf)); | |
c4f34764 | 104 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
105 | |
106 | /* The companion should now own the port, | |
107 | * but if something went wrong the port must not | |
108 | * remain enabled. | |
109 | */ | |
110 | reg = &ehci->regs->port_status[port]; | |
111 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
112 | if (status & PORT_OWNER) | |
113 | ehci_writel(ehci, status | PORT_CSC, reg); | |
114 | else { | |
115 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
116 | port + 1, status); | |
117 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
118 | } | |
119 | } | |
120 | } | |
121 | ||
122 | ehci->owned_ports = 0; | |
c4f34764 | 123 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
124 | } |
125 | ||
c5cf9212 | 126 | static int ehci_port_change(struct ehci_hcd *ehci) |
294d95f2 MG |
127 | { |
128 | int i = HCS_N_PORTS(ehci->hcs_params); | |
129 | ||
130 | /* First check if the controller indicates a change event */ | |
131 | ||
132 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) | |
133 | return 1; | |
134 | ||
135 | /* | |
136 | * Not all controllers appear to update this while going from D3 to D0, | |
137 | * so check the individual port status registers as well | |
138 | */ | |
139 | ||
140 | while (i--) | |
141 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) | |
142 | return 1; | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
74db22cb | 147 | void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 148 | bool suspending, bool do_wakeup) |
16032c4f AS |
149 | { |
150 | int port; | |
151 | u32 temp; | |
152 | ||
153 | /* If remote wakeup is enabled for the root hub but disabled | |
154 | * for the controller, we must adjust all the port wakeup flags | |
155 | * when the controller is suspended or resumed. In all other | |
156 | * cases they don't need to be changed. | |
157 | */ | |
4147200d | 158 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
159 | return; |
160 | ||
c4f34764 | 161 | spin_lock_irq(&ehci->lock); |
148fc55f | 162 | |
16032c4f | 163 | /* clear phy low-power mode before changing wakeup flags */ |
2cdcec4f | 164 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
165 | port = HCS_N_PORTS(ehci->hcs_params); |
166 | while (port--) { | |
a46af4eb | 167 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 168 | |
16032c4f AS |
169 | temp = ehci_readl(ehci, hostpc_reg); |
170 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
171 | } | |
c4f34764 | 172 | spin_unlock_irq(&ehci->lock); |
16032c4f | 173 | msleep(5); |
c4f34764 | 174 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
175 | } |
176 | ||
177 | port = HCS_N_PORTS(ehci->hcs_params); | |
178 | while (port--) { | |
179 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
180 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
181 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
182 | ||
183 | /* If we are suspending the controller, clear the flags. | |
184 | * If we are resuming the controller, set the wakeup flags. | |
185 | */ | |
186 | if (!suspending) { | |
187 | if (t1 & PORT_CONNECT) | |
188 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
189 | else | |
190 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
191 | } | |
16032c4f AS |
192 | ehci_writel(ehci, t2, reg); |
193 | } | |
194 | ||
195 | /* enter phy low-power mode again */ | |
2cdcec4f | 196 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
197 | port = HCS_N_PORTS(ehci->hcs_params); |
198 | while (port--) { | |
a46af4eb | 199 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 200 | |
16032c4f AS |
201 | temp = ehci_readl(ehci, hostpc_reg); |
202 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
203 | } | |
204 | } | |
ee0b9be8 AS |
205 | |
206 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 207 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 208 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f | 209 | |
c4f34764 | 210 | spin_unlock_irq(&ehci->lock); |
16032c4f | 211 | } |
74db22cb | 212 | EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags); |
16032c4f | 213 | |
0c0382e3 | 214 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
215 | { |
216 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
217 | int port; | |
8c03356a | 218 | int mask; |
16032c4f | 219 | int changed; |
3e8d6d85 | 220 | bool fs_idle_delay; |
1da177e4 | 221 | |
8c774fe8 AS |
222 | ehci_dbg(ehci, "suspend root hub\n"); |
223 | ||
1da177e4 LT |
224 | if (time_before (jiffies, ehci->next_statechange)) |
225 | msleep(5); | |
226 | ||
c4f34764 AS |
227 | /* stop the schedules */ |
228 | ehci_quiesce(ehci); | |
229 | ||
1da177e4 | 230 | spin_lock_irq (&ehci->lock); |
43fe3a99 AS |
231 | if (ehci->rh_state < EHCI_RH_RUNNING) |
232 | goto done; | |
1da177e4 | 233 | |
cec3a53c AS |
234 | /* Once the controller is stopped, port resumes that are already |
235 | * in progress won't complete. Hence if remote wakeup is enabled | |
236 | * for the root hub and any ports are in the middle of a resume or | |
237 | * remote wakeup, we must fail the suspend. | |
238 | */ | |
239 | if (hcd->self.root_hub->do_remote_wakeup) { | |
a448e4dc AS |
240 | if (ehci->resuming_ports) { |
241 | spin_unlock_irq(&ehci->lock); | |
242 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); | |
243 | return -EBUSY; | |
cec3a53c AS |
244 | } |
245 | } | |
246 | ||
8c03356a AS |
247 | /* Unlike other USB host controller types, EHCI doesn't have |
248 | * any notion of "global" or bus-wide suspend. The driver has | |
249 | * to manually suspend all the active unsuspended ports, and | |
250 | * then manually resume them in the bus_resume() routine. | |
251 | */ | |
252 | ehci->bus_suspended = 0; | |
383975d7 | 253 | ehci->owned_ports = 0; |
16032c4f | 254 | changed = 0; |
3e8d6d85 | 255 | fs_idle_delay = false; |
cec3a53c | 256 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
257 | while (port--) { |
258 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 259 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 260 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 261 | |
8c03356a | 262 | /* keep track of which ports we suspend */ |
383975d7 AS |
263 | if (t1 & PORT_OWNER) |
264 | set_bit(port, &ehci->owned_ports); | |
265 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 266 | t2 |= PORT_SUSPEND; |
8c03356a AS |
267 | set_bit(port, &ehci->bus_suspended); |
268 | } | |
269 | ||
16032c4f | 270 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
271 | if (hcd->self.root_hub->do_remote_wakeup) { |
272 | /* only enable appropriate wake bits, otherwise the | |
273 | * hardware can not go phy low power mode. If a race | |
274 | * condition happens here(connection change during bits | |
275 | * set), the port change detection will finally fix it. | |
276 | */ | |
16032c4f | 277 | if (t1 & PORT_CONNECT) |
331ac6b2 | 278 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 279 | else |
331ac6b2 | 280 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 281 | } |
1da177e4 LT |
282 | |
283 | if (t1 != t2) { | |
3e8d6d85 AS |
284 | /* |
285 | * On some controllers, Wake-On-Disconnect will | |
286 | * generate false wakeup signals until the bus | |
287 | * switches over to full-speed idle. For their | |
288 | * sake, add a delay if we need one. | |
289 | */ | |
290 | if ((t2 & PORT_WKDISC_E) && | |
291 | ehci_port_speed(ehci, t2) == | |
292 | USB_PORT_STAT_HIGH_SPEED) | |
293 | fs_idle_delay = true; | |
083522d7 | 294 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
295 | changed = 1; |
296 | } | |
297 | } | |
3e8d6d85 AS |
298 | spin_unlock_irq(&ehci->lock); |
299 | ||
9d4b8270 CH |
300 | if (changed && ehci_has_fsl_susp_errata(ehci)) |
301 | /* | |
302 | * Wait for at least 10 millisecondes to ensure the controller | |
303 | * enter the suspend status before initiating a port resume | |
304 | * using the Force Port Resume bit (Not-EHCI compatible). | |
305 | */ | |
306 | usleep_range(10000, 20000); | |
307 | ||
3e8d6d85 AS |
308 | if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { |
309 | /* | |
310 | * Wait for HCD to enter low-power mode or for the bus | |
311 | * to switch to full-speed idle. | |
312 | */ | |
313 | usleep_range(5000, 5500); | |
314 | } | |
331ac6b2 | 315 | |
2cdcec4f | 316 | if (changed && ehci->has_tdi_phy_lpm) { |
16032c4f | 317 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
318 | port = HCS_N_PORTS(ehci->hcs_params); |
319 | while (port--) { | |
a46af4eb | 320 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f AS |
321 | u32 t3; |
322 | ||
16032c4f AS |
323 | t3 = ehci_readl(ehci, hostpc_reg); |
324 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
325 | t3 = ehci_readl(ehci, hostpc_reg); | |
326 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
327 | port, (t3 & HOSTPC_PHCD) ? |
328 | "succeeded" : "failed"); | |
1da177e4 | 329 | } |
3e8d6d85 | 330 | spin_unlock_irq(&ehci->lock); |
1da177e4 LT |
331 | } |
332 | ||
cd930c93 AS |
333 | /* Apparently some devices need a >= 1-uframe delay here */ |
334 | if (ehci->bus_suspended) | |
335 | udelay(150); | |
336 | ||
1da177e4 LT |
337 | /* turn off now-idle HC */ |
338 | ehci_halt (ehci); | |
c4f34764 AS |
339 | |
340 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
341 | if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
342 | ehci_handle_controller_death(ehci); | |
343 | if (ehci->rh_state != EHCI_RH_RUNNING) | |
344 | goto done; | |
e8799906 | 345 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1da177e4 | 346 | |
8df0d77d AS |
347 | unlink_empty_async_suspended(ehci); |
348 | ||
f96fba0d AS |
349 | /* Any IAA cycle that started before the suspend is now invalid */ |
350 | end_iaa_cycle(ehci); | |
9118f9eb | 351 | ehci_handle_start_intr_unlinks(ehci); |
df202255 | 352 | ehci_handle_intr_unlinks(ehci); |
55934eb3 | 353 | end_free_itds(ehci); |
cdc647a9 | 354 | |
8c03356a AS |
355 | /* allow remote wakeup */ |
356 | mask = INTR_MASK; | |
58a97ffe | 357 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 358 | mask &= ~STS_PCD; |
083522d7 BH |
359 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
360 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 361 | |
43fe3a99 | 362 | done: |
1da177e4 | 363 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
d58b4bcc AS |
364 | ehci->enabled_hrtimer_events = 0; |
365 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
1da177e4 | 366 | spin_unlock_irq (&ehci->lock); |
015798b2 | 367 | |
d58b4bcc | 368 | hrtimer_cancel(&ehci->hrtimer); |
1da177e4 LT |
369 | return 0; |
370 | } | |
371 | ||
372 | ||
373 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 374 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
375 | { |
376 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
377 | u32 temp; | |
383975d7 | 378 | u32 power_okay; |
1da177e4 | 379 | int i; |
d0f2fb25 | 380 | unsigned long resume_needed = 0; |
1da177e4 LT |
381 | |
382 | if (time_before (jiffies, ehci->next_statechange)) | |
383 | msleep(5); | |
384 | spin_lock_irq (&ehci->lock); | |
43fe3a99 AS |
385 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
386 | goto shutdown; | |
1da177e4 | 387 | |
ad45f1dc | 388 | if (unlikely(ehci->debug)) { |
9fa5780b | 389 | if (!dbgp_reset_prep(hcd)) |
ad45f1dc JW |
390 | ehci->debug = NULL; |
391 | else | |
9fa5780b | 392 | dbgp_external_startup(hcd); |
ad45f1dc JW |
393 | } |
394 | ||
f03c17fc DB |
395 | /* Ideally and we've got a real resume here, and no port's power |
396 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
397 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
398 | * the last user of the controller, not reset/pm hardware keeping | |
399 | * state we gave to it. | |
400 | */ | |
383975d7 AS |
401 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
402 | ehci_dbg(ehci, "resume root hub%s\n", | |
403 | power_okay ? "" : " after power loss"); | |
f03c17fc | 404 | |
8c03356a AS |
405 | /* at least some APM implementations will try to deliver |
406 | * IRQs right away, so delay them until we're ready. | |
407 | */ | |
083522d7 | 408 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
409 | |
410 | /* re-init operational registers */ | |
083522d7 BH |
411 | ehci_writel(ehci, 0, &ehci->regs->segment); |
412 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
413 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
414 | |
415 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
3d9545cc | 416 | ehci->command |= CMD_RUN; |
083522d7 | 417 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
e8799906 | 418 | ehci->rh_state = EHCI_RH_RUNNING; |
1da177e4 | 419 | |
6273f181 PC |
420 | /* |
421 | * According to Bugzilla #8190, the port status for some controllers | |
422 | * will be wrong without a delay. At their wrong status, the port | |
423 | * is enabled, but not suspended neither resumed. | |
424 | */ | |
425 | i = HCS_N_PORTS(ehci->hcs_params); | |
426 | while (i--) { | |
427 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
428 | if ((temp & PORT_PE) && | |
429 | !(temp & (PORT_SUSPEND | PORT_RESUME))) { | |
430 | ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); | |
431 | spin_unlock_irq(&ehci->lock); | |
432 | msleep(8); | |
433 | spin_lock_irq(&ehci->lock); | |
434 | break; | |
435 | } | |
436 | } | |
437 | ||
43fe3a99 AS |
438 | if (ehci->shutdown) |
439 | goto shutdown; | |
e198a314 | 440 | |
16032c4f | 441 | /* clear phy low-power mode before resume */ |
2cdcec4f | 442 | if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { |
16032c4f AS |
443 | i = HCS_N_PORTS(ehci->hcs_params); |
444 | while (i--) { | |
445 | if (test_bit(i, &ehci->bus_suspended)) { | |
a46af4eb AS |
446 | u32 __iomem *hostpc_reg = |
447 | &ehci->regs->hostpc[i]; | |
16032c4f | 448 | |
16032c4f AS |
449 | temp = ehci_readl(ehci, hostpc_reg); |
450 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
451 | hostpc_reg); | |
452 | } | |
453 | } | |
454 | spin_unlock_irq(&ehci->lock); | |
455 | msleep(5); | |
456 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
457 | if (ehci->shutdown) |
458 | goto shutdown; | |
16032c4f AS |
459 | } |
460 | ||
8c03356a | 461 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
462 | i = HCS_N_PORTS (ehci->hcs_params); |
463 | while (i--) { | |
083522d7 | 464 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 465 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 466 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 467 | (temp & PORT_SUSPEND)) { |
1da177e4 | 468 | temp |= PORT_RESUME; |
d0f2fb25 | 469 | set_bit(i, &resume_needed); |
3a4e72cb | 470 | } |
083522d7 | 471 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 472 | } |
3a4e72cb | 473 | |
ea16328f FB |
474 | /* |
475 | * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume | |
476 | * port | |
477 | */ | |
3a4e72cb VP |
478 | if (resume_needed) { |
479 | spin_unlock_irq(&ehci->lock); | |
ea16328f | 480 | msleep(USB_RESUME_TIMEOUT); |
3a4e72cb | 481 | spin_lock_irq(&ehci->lock); |
43fe3a99 AS |
482 | if (ehci->shutdown) |
483 | goto shutdown; | |
3a4e72cb VP |
484 | } |
485 | ||
1da177e4 | 486 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 487 | while (i--) { |
083522d7 | 488 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
d0f2fb25 | 489 | if (test_bit(i, &resume_needed)) { |
24b90814 | 490 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
083522d7 | 491 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a | 492 | } |
1da177e4 | 493 | } |
1da177e4 LT |
494 | |
495 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
c4f34764 AS |
496 | spin_unlock_irq(&ehci->lock); |
497 | ||
498 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
499 | |
500 | /* Now we can safely re-enable irqs */ | |
43fe3a99 AS |
501 | spin_lock_irq(&ehci->lock); |
502 | if (ehci->shutdown) | |
503 | goto shutdown; | |
083522d7 | 504 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
15be105b | 505 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
43fe3a99 | 506 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 507 | |
1da177e4 | 508 | return 0; |
43fe3a99 AS |
509 | |
510 | shutdown: | |
511 | spin_unlock_irq(&ehci->lock); | |
512 | return -ESHUTDOWN; | |
1da177e4 LT |
513 | } |
514 | ||
00d423c8 AS |
515 | static unsigned long ehci_get_resuming_ports(struct usb_hcd *hcd) |
516 | { | |
517 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
518 | ||
519 | return ehci->resuming_ports; | |
520 | } | |
521 | ||
1da177e4 LT |
522 | #else |
523 | ||
0c0382e3 AS |
524 | #define ehci_bus_suspend NULL |
525 | #define ehci_bus_resume NULL | |
00d423c8 | 526 | #define ehci_get_resuming_ports NULL |
1da177e4 LT |
527 | |
528 | #endif /* CONFIG_PM */ | |
529 | ||
57e06c11 AS |
530 | /*-------------------------------------------------------------------------*/ |
531 | ||
57e06c11 | 532 | /* |
90da096e | 533 | * Sets the owner of a port |
57e06c11 | 534 | */ |
90da096e | 535 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 536 | { |
57e06c11 AS |
537 | u32 __iomem *status_reg; |
538 | u32 port_status; | |
90da096e | 539 | int try; |
57e06c11 | 540 | |
90da096e | 541 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
542 | |
543 | /* | |
544 | * The controller won't set the OWNER bit if the port is | |
545 | * enabled, so this loop will sometimes require at least two | |
546 | * iterations: one to disable the port and one to set OWNER. | |
547 | */ | |
57e06c11 AS |
548 | for (try = 4; try > 0; --try) { |
549 | spin_lock_irq(&ehci->lock); | |
550 | port_status = ehci_readl(ehci, status_reg); | |
551 | if ((port_status & PORT_OWNER) == new_owner | |
552 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
553 | == 0) | |
554 | try = 0; | |
555 | else { | |
556 | port_status ^= PORT_OWNER; | |
557 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
558 | ehci_writel(ehci, port_status, status_reg); | |
559 | } | |
560 | spin_unlock_irq(&ehci->lock); | |
561 | if (try > 1) | |
562 | msleep(5); | |
563 | } | |
90da096e BR |
564 | } |
565 | ||
1da177e4 LT |
566 | /*-------------------------------------------------------------------------*/ |
567 | ||
568 | static int check_reset_complete ( | |
569 | struct ehci_hcd *ehci, | |
570 | int index, | |
e6316565 | 571 | u32 __iomem *status_reg, |
1da177e4 LT |
572 | int port_status |
573 | ) { | |
cd4cdc93 | 574 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 575 | return port_status; |
1da177e4 LT |
576 | |
577 | /* if reset finished and it's still not enabled -- handoff */ | |
578 | if (!(port_status & PORT_PE)) { | |
579 | ||
580 | /* with integrated TT, there's nobody to hand it to! */ | |
581 | if (ehci_is_TDI(ehci)) { | |
582 | ehci_dbg (ehci, | |
583 | "Failed to enable port %d on root hub TT\n", | |
584 | index+1); | |
585 | return port_status; | |
586 | } | |
587 | ||
588 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
589 | index + 1); | |
590 | ||
591 | // what happens if HCS_N_CC(params) == 0 ? | |
592 | port_status |= PORT_OWNER; | |
10f6524a | 593 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 594 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 595 | |
796bcae7 VB |
596 | /* ensure 440EPX ohci controller state is operational */ |
597 | if (ehci->has_amcc_usb23) | |
598 | set_ohci_hcfs(ehci, 1); | |
599 | } else { | |
0ca7eb23 PC |
600 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
601 | index + 1); | |
796bcae7 VB |
602 | /* ensure 440EPx ohci controller state is suspended */ |
603 | if (ehci->has_amcc_usb23) | |
604 | set_ohci_hcfs(ehci, 0); | |
605 | } | |
1da177e4 LT |
606 | |
607 | return port_status; | |
608 | } | |
609 | ||
610 | /*-------------------------------------------------------------------------*/ | |
611 | ||
612 | ||
613 | /* build "status change" packet (one or two bytes) from HC registers */ | |
614 | ||
615 | static int | |
616 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
617 | { | |
618 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
a448e4dc | 619 | u32 temp, status; |
93f1a47c | 620 | u32 mask; |
1da177e4 LT |
621 | int ports, i, retval = 1; |
622 | unsigned long flags; | |
4dd405a4 | 623 | u32 ppcd = ~0; |
1da177e4 | 624 | |
1da177e4 LT |
625 | /* init status to no-changes */ |
626 | buf [0] = 0; | |
627 | ports = HCS_N_PORTS (ehci->hcs_params); | |
628 | if (ports > 7) { | |
629 | buf [1] = 0; | |
630 | retval++; | |
631 | } | |
53bd6a60 | 632 | |
a448e4dc AS |
633 | /* Inform the core about resumes-in-progress by returning |
634 | * a non-zero value even if there are no status changes. | |
635 | */ | |
636 | status = ehci->resuming_ports; | |
637 | ||
93f1a47c DB |
638 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
639 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 640 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
641 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
642 | * PORT_POWER; that's surprising, but maybe within-spec. | |
643 | */ | |
644 | if (!ignore_oc) | |
645 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
646 | else | |
647 | mask = PORT_CSC | PORT_PEC; | |
648 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
649 | ||
1da177e4 LT |
650 | /* no hub change reports (bit 0) for now (power, ...) */ |
651 | ||
652 | /* port N changes (bit N)? */ | |
653 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
654 | |
655 | /* get per-port change detect bits */ | |
656 | if (ehci->has_ppcd) | |
657 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
658 | ||
1da177e4 | 659 | for (i = 0; i < ports; i++) { |
5a9cdf33 | 660 | /* leverage per-port change bits feature */ |
4dd405a4 AS |
661 | if (ppcd & (1 << i)) |
662 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
663 | else | |
664 | temp = 0; | |
625b5c9a AS |
665 | |
666 | /* | |
667 | * Return status information even for ports with OWNER set. | |
37ebb549 | 668 | * Otherwise hub_wq wouldn't see the disconnect event when a |
625b5c9a AS |
669 | * high-speed device is switched over to the companion |
670 | * controller by the user. | |
671 | */ | |
672 | ||
eafe5b99 AS |
673 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
674 | || (ehci->reset_done[i] && time_after_eq( | |
675 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
676 | if (i < 7) |
677 | buf [0] |= 1 << (i + 1); | |
678 | else | |
679 | buf [1] |= 1 << (i - 7); | |
680 | status = STS_PCD; | |
681 | } | |
682 | } | |
ee74290b AS |
683 | |
684 | /* If a resume is in progress, make sure it can finish */ | |
685 | if (ehci->resuming_ports) | |
686 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); | |
687 | ||
1da177e4 LT |
688 | spin_unlock_irqrestore (&ehci->lock, flags); |
689 | return status ? retval : 0; | |
690 | } | |
691 | ||
692 | /*-------------------------------------------------------------------------*/ | |
693 | ||
694 | static void | |
695 | ehci_hub_descriptor ( | |
696 | struct ehci_hcd *ehci, | |
697 | struct usb_hub_descriptor *desc | |
698 | ) { | |
699 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
700 | u16 temp; | |
701 | ||
625a4c59 | 702 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 LT |
703 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ |
704 | desc->bHubContrCurrent = 0; | |
705 | ||
706 | desc->bNbrPorts = ports; | |
707 | temp = 1 + (ports / 8); | |
708 | desc->bDescLength = 7 + 2 * temp; | |
709 | ||
710 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
711 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
712 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 | 713 | |
3a2359ee | 714 | temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ |
1da177e4 | 715 | if (HCS_PPC (ehci->hcs_params)) |
3a2359ee | 716 | temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ |
56c1e26d | 717 | else |
3a2359ee | 718 | temp |= HUB_CHAR_NO_LPSM; /* no power switching */ |
1da177e4 LT |
719 | #if 0 |
720 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
721 | if (HCS_INDICATOR (ehci->hcs_params)) | |
3a2359ee | 722 | temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ |
1da177e4 | 723 | #endif |
fd05e720 | 724 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
725 | } |
726 | ||
9841f37a | 727 | /*-------------------------------------------------------------------------*/ |
726a85ca JP |
728 | #ifdef CONFIG_USB_HCD_TEST_MODE |
729 | ||
9841f37a MG |
730 | #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06 |
731 | ||
732 | static void usb_ehset_completion(struct urb *urb) | |
733 | { | |
734 | struct completion *done = urb->context; | |
735 | ||
736 | complete(done); | |
737 | } | |
738 | static int submit_single_step_set_feature( | |
739 | struct usb_hcd *hcd, | |
740 | struct urb *urb, | |
741 | int is_setup | |
742 | ); | |
743 | ||
744 | /* | |
745 | * Allocate and initialize a control URB. This request will be used by the | |
746 | * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages | |
747 | * of the GetDescriptor request are sent 15 seconds after the SETUP stage. | |
748 | * Return NULL if failed. | |
749 | */ | |
750 | static struct urb *request_single_step_set_feature_urb( | |
751 | struct usb_device *udev, | |
752 | void *dr, | |
753 | void *buf, | |
754 | struct completion *done | |
755 | ) { | |
756 | struct urb *urb; | |
757 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
758 | struct usb_host_endpoint *ep; | |
759 | ||
760 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
761 | if (!urb) | |
762 | return NULL; | |
763 | ||
764 | urb->pipe = usb_rcvctrlpipe(udev, 0); | |
765 | ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out) | |
766 | [usb_pipeendpoint(urb->pipe)]; | |
767 | if (!ep) { | |
768 | usb_free_urb(urb); | |
769 | return NULL; | |
770 | } | |
771 | ||
772 | urb->ep = ep; | |
773 | urb->dev = udev; | |
774 | urb->setup_packet = (void *)dr; | |
775 | urb->transfer_buffer = buf; | |
776 | urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; | |
777 | urb->complete = usb_ehset_completion; | |
778 | urb->status = -EINPROGRESS; | |
779 | urb->actual_length = 0; | |
780 | urb->transfer_flags = URB_DIR_IN; | |
781 | usb_get_urb(urb); | |
782 | atomic_inc(&urb->use_count); | |
783 | atomic_inc(&urb->dev->urbnum); | |
784 | urb->setup_dma = dma_map_single( | |
02a10f06 | 785 | hcd->self.sysdev, |
9841f37a MG |
786 | urb->setup_packet, |
787 | sizeof(struct usb_ctrlrequest), | |
788 | DMA_TO_DEVICE); | |
789 | urb->transfer_dma = dma_map_single( | |
02a10f06 | 790 | hcd->self.sysdev, |
9841f37a MG |
791 | urb->transfer_buffer, |
792 | urb->transfer_buffer_length, | |
793 | DMA_FROM_DEVICE); | |
794 | urb->context = done; | |
795 | return urb; | |
796 | } | |
797 | ||
798 | static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) | |
799 | { | |
800 | int retval = -ENOMEM; | |
801 | struct usb_ctrlrequest *dr; | |
802 | struct urb *urb; | |
803 | struct usb_device *udev; | |
804 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
805 | struct usb_device_descriptor *buf; | |
806 | DECLARE_COMPLETION_ONSTACK(done); | |
807 | ||
808 | /* Obtain udev of the rhub's child port */ | |
809 | udev = usb_hub_find_child(hcd->self.root_hub, port); | |
810 | if (!udev) { | |
811 | ehci_err(ehci, "No device attached to the RootHub\n"); | |
812 | return -ENODEV; | |
813 | } | |
814 | buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); | |
815 | if (!buf) | |
816 | return -ENOMEM; | |
817 | ||
818 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | |
819 | if (!dr) { | |
820 | kfree(buf); | |
821 | return -ENOMEM; | |
822 | } | |
823 | ||
824 | /* Fill Setup packet for GetDescriptor */ | |
825 | dr->bRequestType = USB_DIR_IN; | |
826 | dr->bRequest = USB_REQ_GET_DESCRIPTOR; | |
827 | dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); | |
828 | dr->wIndex = 0; | |
829 | dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); | |
830 | urb = request_single_step_set_feature_urb(udev, dr, buf, &done); | |
831 | if (!urb) | |
832 | goto cleanup; | |
833 | ||
834 | /* Submit just the SETUP stage */ | |
835 | retval = submit_single_step_set_feature(hcd, urb, 1); | |
836 | if (retval) | |
837 | goto out1; | |
838 | if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { | |
839 | usb_kill_urb(urb); | |
840 | retval = -ETIMEDOUT; | |
841 | ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__); | |
842 | goto out1; | |
843 | } | |
844 | msleep(15 * 1000); | |
845 | ||
846 | /* Complete remaining DATA and STATUS stages using the same URB */ | |
847 | urb->status = -EINPROGRESS; | |
848 | usb_get_urb(urb); | |
849 | atomic_inc(&urb->use_count); | |
850 | atomic_inc(&urb->dev->urbnum); | |
851 | retval = submit_single_step_set_feature(hcd, urb, 0); | |
852 | if (!retval && !wait_for_completion_timeout(&done, | |
853 | msecs_to_jiffies(2000))) { | |
854 | usb_kill_urb(urb); | |
855 | retval = -ETIMEDOUT; | |
856 | ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__); | |
857 | } | |
858 | out1: | |
859 | usb_free_urb(urb); | |
860 | cleanup: | |
861 | kfree(dr); | |
862 | kfree(buf); | |
863 | return retval; | |
864 | } | |
726a85ca | 865 | #endif /* CONFIG_USB_HCD_TEST_MODE */ |
1da177e4 LT |
866 | /*-------------------------------------------------------------------------*/ |
867 | ||
37769939 | 868 | int ehci_hub_control( |
1da177e4 LT |
869 | struct usb_hcd *hcd, |
870 | u16 typeReq, | |
871 | u16 wValue, | |
872 | u16 wIndex, | |
873 | char *buf, | |
874 | u16 wLength | |
875 | ) { | |
876 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
877 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
85e3990b | 878 | u32 __iomem *status_reg, *hostpc_reg; |
331ac6b2 | 879 | u32 temp, temp1, status; |
1da177e4 LT |
880 | unsigned long flags; |
881 | int retval = 0; | |
f0d7f273 | 882 | unsigned selector; |
1da177e4 | 883 | |
85e3990b AS |
884 | /* |
885 | * Avoid underflow while calculating (wIndex & 0xff) - 1. | |
886 | * The compiler might deduce that wIndex can never be 0 and then | |
887 | * optimize away the tests for !wIndex below. | |
888 | */ | |
889 | temp = wIndex & 0xff; | |
890 | temp -= (temp > 0); | |
891 | status_reg = &ehci->regs->port_status[temp]; | |
892 | hostpc_reg = &ehci->regs->hostpc[temp]; | |
893 | ||
1da177e4 LT |
894 | /* |
895 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
896 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
897 | * (track current state ourselves) ... blink for diagnostics, | |
898 | * power, "this is the one", etc. EHCI spec supports this. | |
899 | */ | |
900 | ||
901 | spin_lock_irqsave (&ehci->lock, flags); | |
902 | switch (typeReq) { | |
903 | case ClearHubFeature: | |
904 | switch (wValue) { | |
905 | case C_HUB_LOCAL_POWER: | |
906 | case C_HUB_OVER_CURRENT: | |
907 | /* no hub-wide feature/status flags */ | |
908 | break; | |
909 | default: | |
910 | goto error; | |
911 | } | |
912 | break; | |
913 | case ClearPortFeature: | |
914 | if (!wIndex || wIndex > ports) | |
915 | goto error; | |
916 | wIndex--; | |
e6316565 | 917 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 918 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
919 | |
920 | /* | |
921 | * Even if OWNER is set, so the port is owned by the | |
37ebb549 | 922 | * companion controller, hub_wq needs to be able to clear |
625b5c9a | 923 | * the port-change status bits (especially |
749da5f8 | 924 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 925 | */ |
1da177e4 LT |
926 | |
927 | switch (wValue) { | |
928 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 929 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
930 | break; |
931 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 932 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
933 | break; |
934 | case USB_PORT_FEAT_SUSPEND: | |
935 | if (temp & PORT_RESET) | |
936 | goto error; | |
f8aeb3bb DB |
937 | if (ehci->no_selective_suspend) |
938 | break; | |
83722bc9 AG |
939 | #ifdef CONFIG_USB_OTG |
940 | if ((hcd->self.otg_port == (wIndex + 1)) | |
941 | && hcd->self.b_hnp_enable) { | |
3d46e73d | 942 | otg_start_hnp(hcd->usb_phy->otg); |
83722bc9 AG |
943 | break; |
944 | } | |
945 | #endif | |
16032c4f AS |
946 | if (!(temp & PORT_SUSPEND)) |
947 | break; | |
948 | if ((temp & PORT_PE) == 0) | |
949 | goto error; | |
950 | ||
951 | /* clear phy low-power mode before resume */ | |
2cdcec4f | 952 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
953 | temp1 = ehci_readl(ehci, hostpc_reg); |
954 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 955 | hostpc_reg); |
16032c4f AS |
956 | spin_unlock_irqrestore(&ehci->lock, flags); |
957 | msleep(5);/* wait to leave low-power mode */ | |
958 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 959 | } |
16032c4f | 960 | /* resume signaling for 20 msec */ |
6d5f89c7 | 961 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
962 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
963 | ehci->reset_done[wIndex] = jiffies | |
ea16328f | 964 | + msecs_to_jiffies(USB_RESUME_TIMEOUT); |
3a20446f AS |
965 | set_bit(wIndex, &ehci->resuming_ports); |
966 | usb_hcd_start_port_resume(&hcd->self, wIndex); | |
1da177e4 LT |
967 | break; |
968 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 969 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
970 | break; |
971 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
972 | if (HCS_PPC(ehci->hcs_params)) { |
973 | spin_unlock_irqrestore(&ehci->lock, flags); | |
974 | ehci_port_power(ehci, wIndex, false); | |
975 | spin_lock_irqsave(&ehci->lock, flags); | |
976 | } | |
1da177e4 LT |
977 | break; |
978 | case USB_PORT_FEAT_C_CONNECTION: | |
6d5f89c7 | 979 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
980 | break; |
981 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 982 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
983 | break; |
984 | case USB_PORT_FEAT_C_RESET: | |
985 | /* GetPortStatus clears reset */ | |
986 | break; | |
987 | default: | |
988 | goto error; | |
989 | } | |
083522d7 | 990 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
991 | break; |
992 | case GetHubDescriptor: | |
993 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
994 | buf); | |
995 | break; | |
996 | case GetHubStatus: | |
997 | /* no hub-wide feature/status flags */ | |
998 | memset (buf, 0, 4); | |
999 | //cpu_to_le32s ((u32 *) buf); | |
1000 | break; | |
1001 | case GetPortStatus: | |
1002 | if (!wIndex || wIndex > ports) | |
1003 | goto error; | |
1004 | wIndex--; | |
1005 | status = 0; | |
e6316565 | 1006 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1007 | |
1008 | // wPortChange bits | |
1009 | if (temp & PORT_CSC) | |
749da5f8 | 1010 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 1011 | if (temp & PORT_PEC) |
749da5f8 | 1012 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
1013 | |
1014 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 1015 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 1016 | |
756aa6b3 CE |
1017 | /* |
1018 | * Hubs should disable port power on over-current. | |
1019 | * However, not all EHCI implementations do this | |
1020 | * automatically, even if they _do_ support per-port | |
1021 | * power switching; they're allowed to just limit the | |
37ebb549 | 1022 | * current. hub_wq will turn the power back on. |
756aa6b3 | 1023 | */ |
e6604a7f CE |
1024 | if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
1025 | && HCS_PPC(ehci->hcs_params)) { | |
11a7e594 MG |
1026 | spin_unlock_irqrestore(&ehci->lock, flags); |
1027 | ehci_port_power(ehci, wIndex, false); | |
1028 | spin_lock_irqsave(&ehci->lock, flags); | |
81463c1d | 1029 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
1030 | } |
1031 | } | |
1032 | ||
6753f4cf AS |
1033 | /* no reset or resume pending */ |
1034 | if (!ehci->reset_done[wIndex]) { | |
629e4427 AS |
1035 | |
1036 | /* Remote Wakeup received? */ | |
6753f4cf | 1037 | if (temp & PORT_RESUME) { |
629e4427 AS |
1038 | /* resume signaling for 20 msec */ |
1039 | ehci->reset_done[wIndex] = jiffies | |
1040 | + msecs_to_jiffies(20); | |
f292e7f9 | 1041 | usb_hcd_start_port_resume(&hcd->self, wIndex); |
47a64a13 | 1042 | set_bit(wIndex, &ehci->resuming_ports); |
629e4427 AS |
1043 | /* check the port again */ |
1044 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
1045 | ehci->reset_done[wIndex]); | |
1046 | } | |
1da177e4 | 1047 | |
6753f4cf AS |
1048 | /* reset or resume not yet complete */ |
1049 | } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { | |
1050 | ; /* wait until it is complete */ | |
1051 | ||
1052 | /* resume completed */ | |
1053 | } else if (test_bit(wIndex, &ehci->resuming_ports)) { | |
1054 | clear_bit(wIndex, &ehci->suspended_ports); | |
1055 | set_bit(wIndex, &ehci->port_c_suspend); | |
1056 | ehci->reset_done[wIndex] = 0; | |
1057 | usb_hcd_end_port_resume(&hcd->self, wIndex); | |
1058 | ||
1059 | /* stop resume signaling */ | |
1060 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); | |
1061 | ehci_writel(ehci, temp, status_reg); | |
1062 | clear_bit(wIndex, &ehci->resuming_ports); | |
1063 | retval = ehci_handshake(ehci, status_reg, | |
1064 | PORT_RESUME, 0, 2000 /* 2msec */); | |
1065 | if (retval != 0) { | |
1066 | ehci_err(ehci, "port %d resume error %d\n", | |
629e4427 | 1067 | wIndex + 1, retval); |
6753f4cf | 1068 | goto error; |
1da177e4 | 1069 | } |
6753f4cf | 1070 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1071 | |
1072 | /* whoever resets must GetPortStatus to complete it!! */ | |
6753f4cf | 1073 | } else { |
749da5f8 | 1074 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 LT |
1075 | ehci->reset_done [wIndex] = 0; |
1076 | ||
1077 | /* force reset to complete */ | |
083522d7 | 1078 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 1079 | status_reg); |
c22fa3ac DB |
1080 | /* REVISIT: some hardware needs 550+ usec to clear |
1081 | * this bit; seems too long to spin routinely... | |
1082 | */ | |
2f3a6b86 | 1083 | retval = ehci_handshake(ehci, status_reg, |
6307e096 | 1084 | PORT_RESET, 0, 1000); |
1da177e4 LT |
1085 | if (retval != 0) { |
1086 | ehci_err (ehci, "port %d reset error %d\n", | |
1087 | wIndex + 1, retval); | |
1088 | goto error; | |
1089 | } | |
1090 | ||
1091 | /* see what we found out */ | |
e6316565 AS |
1092 | temp = check_reset_complete (ehci, wIndex, status_reg, |
1093 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
1094 | } |
1095 | ||
57e06c11 AS |
1096 | /* transfer dedicated ports to the companion hc */ |
1097 | if ((temp & PORT_CONNECT) && | |
1098 | test_bit(wIndex, &ehci->companion_ports)) { | |
1099 | temp &= ~PORT_RWC_BITS; | |
1100 | temp |= PORT_OWNER; | |
1101 | ehci_writel(ehci, temp, status_reg); | |
1102 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
1103 | temp = ehci_readl(ehci, status_reg); | |
1104 | } | |
1105 | ||
625b5c9a | 1106 | /* |
37ebb549 | 1107 | * Even if OWNER is set, there's no harm letting hub_wq |
625b5c9a AS |
1108 | * see the wPortStatus values (they should all be 0 except |
1109 | * for PORT_POWER anyway). | |
1110 | */ | |
1111 | ||
1112 | if (temp & PORT_CONNECT) { | |
749da5f8 | 1113 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 1114 | // status may be from integrated TT |
331ac6b2 AD |
1115 | if (ehci->has_hostpc) { |
1116 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1117 | status |= ehci_port_speed(ehci, temp1); | |
1118 | } else | |
1119 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 1120 | } |
625b5c9a | 1121 | if (temp & PORT_PE) |
749da5f8 | 1122 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
1123 | |
1124 | /* maybe the port was unsuspended without our knowledge */ | |
1125 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 1126 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
1127 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
1128 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 1129 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
1130 | ehci->reset_done[wIndex] = 0; |
1131 | if (temp & PORT_PE) | |
1132 | set_bit(wIndex, &ehci->port_c_suspend); | |
f292e7f9 | 1133 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
eafe5b99 AS |
1134 | } |
1135 | ||
625b5c9a | 1136 | if (temp & PORT_OC) |
749da5f8 | 1137 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 1138 | if (temp & PORT_RESET) |
749da5f8 | 1139 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 1140 | if (temp & PORT_POWER) |
749da5f8 | 1141 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 1142 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 1143 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 1144 | |
bbcd5cab ON |
1145 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
1146 | dbg_port(ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 1147 | put_unaligned_le32(status, buf); |
1da177e4 LT |
1148 | break; |
1149 | case SetHubFeature: | |
1150 | switch (wValue) { | |
1151 | case C_HUB_LOCAL_POWER: | |
1152 | case C_HUB_OVER_CURRENT: | |
1153 | /* no hub-wide feature/status flags */ | |
1154 | break; | |
1155 | default: | |
1156 | goto error; | |
1157 | } | |
1158 | break; | |
1159 | case SetPortFeature: | |
f0d7f273 DB |
1160 | selector = wIndex >> 8; |
1161 | wIndex &= 0xff; | |
8d053c79 JW |
1162 | if (unlikely(ehci->debug)) { |
1163 | /* If the debug port is active any port | |
1164 | * feature requests should get denied */ | |
1165 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
1166 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
1167 | retval = -ENODEV; | |
1168 | goto error_exit; | |
1169 | } | |
1170 | } | |
1da177e4 LT |
1171 | if (!wIndex || wIndex > ports) |
1172 | goto error; | |
1173 | wIndex--; | |
e6316565 | 1174 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1175 | if (temp & PORT_OWNER) |
1176 | break; | |
1177 | ||
10f6524a | 1178 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1179 | switch (wValue) { |
1180 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1181 | if (ehci->no_selective_suspend) |
1182 | break; | |
1da177e4 LT |
1183 | if ((temp & PORT_PE) == 0 |
1184 | || (temp & PORT_RESET) != 0) | |
1185 | goto error; | |
b9df7942 | 1186 | |
331ac6b2 AD |
1187 | /* After above check the port must be connected. |
1188 | * Set appropriate bit thus could put phy into low power | |
2cdcec4f | 1189 | * mode if we have tdi_phy_lpm feature |
331ac6b2 | 1190 | */ |
b9df7942 AD |
1191 | temp &= ~PORT_WKCONN_E; |
1192 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1193 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
2cdcec4f | 1194 | if (ehci->has_tdi_phy_lpm) { |
b9df7942 | 1195 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1196 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1197 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1198 | temp1 = ehci_readl(ehci, hostpc_reg); |
1199 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1200 | hostpc_reg); | |
1201 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1202 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1203 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1204 | "succeeded" : "failed"); | |
1205 | } | |
9d4b8270 CH |
1206 | if (ehci_has_fsl_susp_errata(ehci)) { |
1207 | /* 10ms for HCD enter suspend */ | |
1208 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1209 | usleep_range(10000, 20000); | |
1210 | spin_lock_irqsave(&ehci->lock, flags); | |
1211 | } | |
eafe5b99 | 1212 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1213 | break; |
1214 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
1215 | if (HCS_PPC(ehci->hcs_params)) { |
1216 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1217 | ehci_port_power(ehci, wIndex, true); | |
1218 | spin_lock_irqsave(&ehci->lock, flags); | |
1219 | } | |
1da177e4 LT |
1220 | break; |
1221 | case USB_PORT_FEAT_RESET: | |
6753f4cf | 1222 | if (temp & (PORT_SUSPEND|PORT_RESUME)) |
1da177e4 LT |
1223 | goto error; |
1224 | /* line status bits may report this as low speed, | |
1225 | * which can be fine if this root hub has a | |
1226 | * transaction translator built in. | |
1227 | */ | |
1228 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1229 | && !ehci_is_TDI(ehci) | |
1230 | && PORT_USB11 (temp)) { | |
1231 | ehci_dbg (ehci, | |
1232 | "port %d low speed --> companion\n", | |
1233 | wIndex + 1); | |
1234 | temp |= PORT_OWNER; | |
1235 | } else { | |
1da177e4 LT |
1236 | temp |= PORT_RESET; |
1237 | temp &= ~PORT_PE; | |
1238 | ||
1239 | /* | |
1240 | * caller must wait, then call GetPortStatus | |
1241 | * usb 2.0 spec says 50 ms resets on root | |
1242 | */ | |
1243 | ehci->reset_done [wIndex] = jiffies | |
1244 | + msecs_to_jiffies (50); | |
f8786a91 NB |
1245 | |
1246 | /* | |
1247 | * Force full-speed connect for FSL high-speed | |
1248 | * erratum; disable HS Chirp by setting PFSC bit | |
1249 | */ | |
1250 | if (ehci_has_fsl_hs_errata(ehci)) | |
1251 | temp |= (1 << PORTSC_FSL_PFSC); | |
1da177e4 | 1252 | } |
e6316565 | 1253 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1254 | break; |
f0d7f273 DB |
1255 | |
1256 | /* For downstream facing ports (these): one hub port is put | |
1257 | * into test mode according to USB2 11.24.2.13, then the hub | |
1258 | * must be reset (which for root hub now means rmmod+modprobe, | |
1259 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1260 | * about the EHCI-specific stuff. | |
1261 | */ | |
1262 | case USB_PORT_FEAT_TEST: | |
726a85ca | 1263 | #ifdef CONFIG_USB_HCD_TEST_MODE |
9841f37a MG |
1264 | if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
1265 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1266 | retval = ehset_single_step_set_feature(hcd, | |
5cbcc35e | 1267 | wIndex + 1); |
9841f37a MG |
1268 | spin_lock_irqsave(&ehci->lock, flags); |
1269 | break; | |
726a85ca JP |
1270 | } |
1271 | #endif | |
1272 | if (!selector || selector > 5) | |
f0d7f273 | 1273 | goto error; |
c4f34764 | 1274 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1275 | ehci_quiesce(ehci); |
c4f34764 | 1276 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
1277 | |
1278 | /* Put all enabled ports into suspend */ | |
1279 | while (ports--) { | |
1280 | u32 __iomem *sreg = | |
1281 | &ehci->regs->port_status[ports]; | |
1282 | ||
1283 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; | |
1284 | if (temp & PORT_PE) | |
1285 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1286 | sreg); | |
1287 | } | |
c4f34764 AS |
1288 | |
1289 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1290 | ehci_halt(ehci); |
c4f34764 AS |
1291 | spin_lock_irqsave(&ehci->lock, flags); |
1292 | ||
77636c86 | 1293 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1294 | temp |= selector << 16; |
e6316565 | 1295 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1296 | break; |
1297 | ||
1da177e4 LT |
1298 | default: |
1299 | goto error; | |
1300 | } | |
083522d7 | 1301 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1302 | break; |
1303 | ||
1304 | default: | |
1305 | error: | |
1306 | /* "stall" on error */ | |
1307 | retval = -EPIPE; | |
1308 | } | |
8d053c79 | 1309 | error_exit: |
1da177e4 LT |
1310 | spin_unlock_irqrestore (&ehci->lock, flags); |
1311 | return retval; | |
1312 | } | |
37769939 | 1313 | EXPORT_SYMBOL_GPL(ehci_hub_control); |
90da096e | 1314 | |
3e023203 | 1315 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
90da096e BR |
1316 | { |
1317 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1318 | ||
1319 | if (ehci_is_TDI(ehci)) | |
1320 | return; | |
1321 | set_owner(ehci, --portnum, PORT_OWNER); | |
1322 | } | |
1323 | ||
3e023203 | 1324 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
3a31155c AS |
1325 | { |
1326 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1327 | u32 __iomem *reg; | |
1328 | ||
1329 | if (ehci_is_TDI(ehci)) | |
1330 | return 0; | |
1331 | reg = &ehci->regs->port_status[portnum - 1]; | |
1332 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1333 | } | |
11a7e594 MG |
1334 | |
1335 | static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) | |
1336 | { | |
1337 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
1338 | u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; | |
1339 | u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; | |
1340 | ||
1341 | if (enable) | |
1342 | ehci_writel(ehci, temp | PORT_POWER, status_reg); | |
1343 | else | |
1344 | ehci_writel(ehci, temp & ~PORT_POWER, status_reg); | |
1345 | ||
1346 | if (hcd->driver->port_power) | |
1347 | hcd->driver->port_power(hcd, portnum, enable); | |
1348 | ||
1349 | return 0; | |
1350 | } |