Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
d49d4317 | 2 | * Copyright (C) 2001-2004 by David Brownell |
53bd6a60 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* this file is part of ehci-hcd.c */ | |
20 | ||
21 | /*-------------------------------------------------------------------------*/ | |
22 | ||
23 | /* | |
24 | * EHCI Root Hub ... the nonsharable stuff | |
25 | * | |
26 | * Registers don't need cpu_to_le32, that happens transparently | |
27 | */ | |
28 | ||
29 | /*-------------------------------------------------------------------------*/ | |
83722bc9 | 30 | #include <linux/usb/otg.h> |
1da177e4 | 31 | |
58a97ffe AS |
32 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
33 | ||
aff6d18f AS |
34 | #ifdef CONFIG_PM |
35 | ||
9b790915 JW |
36 | static int persist_enabled_on_companion(struct usb_device *udev, void *unused) |
37 | { | |
38 | return !udev->maxchild && udev->persist_enabled && | |
39 | udev->bus->root_hub->speed < USB_SPEED_HIGH; | |
40 | } | |
41 | ||
383975d7 AS |
42 | /* After a power loss, ports that were owned by the companion must be |
43 | * reset so that the companion can still own them. | |
44 | */ | |
45 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
46 | { | |
47 | u32 __iomem *reg; | |
48 | u32 status; | |
49 | int port; | |
50 | __le32 buf; | |
51 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
52 | ||
53 | if (!ehci->owned_ports) | |
54 | return; | |
55 | ||
9b790915 JW |
56 | /* |
57 | * USB 1.1 devices are mostly HIDs, which don't need to persist across | |
58 | * suspends. If we ensure that none of our companion's devices have | |
59 | * persist_enabled (by looking through all USB 1.1 buses in the system), | |
60 | * we can skip this and avoid slowing resume down. Devices without | |
61 | * persist will just get reenumerated shortly after resume anyway. | |
62 | */ | |
63 | if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) | |
64 | return; | |
65 | ||
c73cee71 AS |
66 | /* Make sure the ports are powered */ |
67 | port = HCS_N_PORTS(ehci->hcs_params); | |
68 | while (port--) { | |
69 | if (test_bit(port, &ehci->owned_ports)) { | |
70 | reg = &ehci->regs->port_status[port]; | |
71 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
11a7e594 MG |
72 | if (!(status & PORT_POWER)) |
73 | ehci_port_power(ehci, port, true); | |
c73cee71 AS |
74 | } |
75 | } | |
76 | ||
383975d7 AS |
77 | /* Give the connections some time to appear */ |
78 | msleep(20); | |
79 | ||
c4f34764 | 80 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
81 | port = HCS_N_PORTS(ehci->hcs_params); |
82 | while (port--) { | |
83 | if (test_bit(port, &ehci->owned_ports)) { | |
84 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 85 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
86 | |
87 | /* Port already owned by companion? */ | |
88 | if (status & PORT_OWNER) | |
89 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
90 | else if (test_bit(port, &ehci->companion_ports)) |
91 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
c4f34764 AS |
92 | else { |
93 | spin_unlock_irq(&ehci->lock); | |
383975d7 AS |
94 | ehci_hub_control(hcd, SetPortFeature, |
95 | USB_PORT_FEAT_RESET, port + 1, | |
96 | NULL, 0); | |
c4f34764 AS |
97 | spin_lock_irq(&ehci->lock); |
98 | } | |
383975d7 AS |
99 | } |
100 | } | |
c4f34764 | 101 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
102 | |
103 | if (!ehci->owned_ports) | |
104 | return; | |
105 | msleep(90); /* Wait for resets to complete */ | |
106 | ||
c4f34764 | 107 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
108 | port = HCS_N_PORTS(ehci->hcs_params); |
109 | while (port--) { | |
110 | if (test_bit(port, &ehci->owned_ports)) { | |
c4f34764 | 111 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
112 | ehci_hub_control(hcd, GetPortStatus, |
113 | 0, port + 1, | |
114 | (char *) &buf, sizeof(buf)); | |
c4f34764 | 115 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
116 | |
117 | /* The companion should now own the port, | |
118 | * but if something went wrong the port must not | |
119 | * remain enabled. | |
120 | */ | |
121 | reg = &ehci->regs->port_status[port]; | |
122 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
123 | if (status & PORT_OWNER) | |
124 | ehci_writel(ehci, status | PORT_CSC, reg); | |
125 | else { | |
126 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
127 | port + 1, status); | |
128 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
129 | } | |
130 | } | |
131 | } | |
132 | ||
133 | ehci->owned_ports = 0; | |
c4f34764 | 134 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
135 | } |
136 | ||
c5cf9212 | 137 | static int ehci_port_change(struct ehci_hcd *ehci) |
294d95f2 MG |
138 | { |
139 | int i = HCS_N_PORTS(ehci->hcs_params); | |
140 | ||
141 | /* First check if the controller indicates a change event */ | |
142 | ||
143 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) | |
144 | return 1; | |
145 | ||
146 | /* | |
147 | * Not all controllers appear to update this while going from D3 to D0, | |
148 | * so check the individual port status registers as well | |
149 | */ | |
150 | ||
151 | while (i--) | |
152 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) | |
153 | return 1; | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
c5cf9212 | 158 | static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 159 | bool suspending, bool do_wakeup) |
16032c4f AS |
160 | { |
161 | int port; | |
162 | u32 temp; | |
163 | ||
164 | /* If remote wakeup is enabled for the root hub but disabled | |
165 | * for the controller, we must adjust all the port wakeup flags | |
166 | * when the controller is suspended or resumed. In all other | |
167 | * cases they don't need to be changed. | |
168 | */ | |
4147200d | 169 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
170 | return; |
171 | ||
c4f34764 | 172 | spin_lock_irq(&ehci->lock); |
148fc55f | 173 | |
16032c4f | 174 | /* clear phy low-power mode before changing wakeup flags */ |
2cdcec4f | 175 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
176 | port = HCS_N_PORTS(ehci->hcs_params); |
177 | while (port--) { | |
a46af4eb | 178 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 179 | |
16032c4f AS |
180 | temp = ehci_readl(ehci, hostpc_reg); |
181 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
182 | } | |
c4f34764 | 183 | spin_unlock_irq(&ehci->lock); |
16032c4f | 184 | msleep(5); |
c4f34764 | 185 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
186 | } |
187 | ||
188 | port = HCS_N_PORTS(ehci->hcs_params); | |
189 | while (port--) { | |
190 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
191 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
192 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
193 | ||
194 | /* If we are suspending the controller, clear the flags. | |
195 | * If we are resuming the controller, set the wakeup flags. | |
196 | */ | |
197 | if (!suspending) { | |
198 | if (t1 & PORT_CONNECT) | |
199 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
200 | else | |
201 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
202 | } | |
16032c4f AS |
203 | ehci_writel(ehci, t2, reg); |
204 | } | |
205 | ||
206 | /* enter phy low-power mode again */ | |
2cdcec4f | 207 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
208 | port = HCS_N_PORTS(ehci->hcs_params); |
209 | while (port--) { | |
a46af4eb | 210 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 211 | |
16032c4f AS |
212 | temp = ehci_readl(ehci, hostpc_reg); |
213 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
214 | } | |
215 | } | |
ee0b9be8 AS |
216 | |
217 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 218 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 219 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f | 220 | |
c4f34764 | 221 | spin_unlock_irq(&ehci->lock); |
16032c4f AS |
222 | } |
223 | ||
0c0382e3 | 224 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
225 | { |
226 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
227 | int port; | |
8c03356a | 228 | int mask; |
16032c4f | 229 | int changed; |
3e8d6d85 | 230 | bool fs_idle_delay; |
1da177e4 | 231 | |
8c774fe8 AS |
232 | ehci_dbg(ehci, "suspend root hub\n"); |
233 | ||
1da177e4 LT |
234 | if (time_before (jiffies, ehci->next_statechange)) |
235 | msleep(5); | |
236 | ||
c4f34764 AS |
237 | /* stop the schedules */ |
238 | ehci_quiesce(ehci); | |
239 | ||
1da177e4 | 240 | spin_lock_irq (&ehci->lock); |
43fe3a99 AS |
241 | if (ehci->rh_state < EHCI_RH_RUNNING) |
242 | goto done; | |
1da177e4 | 243 | |
cec3a53c AS |
244 | /* Once the controller is stopped, port resumes that are already |
245 | * in progress won't complete. Hence if remote wakeup is enabled | |
246 | * for the root hub and any ports are in the middle of a resume or | |
247 | * remote wakeup, we must fail the suspend. | |
248 | */ | |
249 | if (hcd->self.root_hub->do_remote_wakeup) { | |
a448e4dc AS |
250 | if (ehci->resuming_ports) { |
251 | spin_unlock_irq(&ehci->lock); | |
252 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); | |
253 | return -EBUSY; | |
cec3a53c AS |
254 | } |
255 | } | |
256 | ||
8c03356a AS |
257 | /* Unlike other USB host controller types, EHCI doesn't have |
258 | * any notion of "global" or bus-wide suspend. The driver has | |
259 | * to manually suspend all the active unsuspended ports, and | |
260 | * then manually resume them in the bus_resume() routine. | |
261 | */ | |
262 | ehci->bus_suspended = 0; | |
383975d7 | 263 | ehci->owned_ports = 0; |
16032c4f | 264 | changed = 0; |
3e8d6d85 | 265 | fs_idle_delay = false; |
cec3a53c | 266 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
267 | while (port--) { |
268 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 269 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 270 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 271 | |
8c03356a | 272 | /* keep track of which ports we suspend */ |
383975d7 AS |
273 | if (t1 & PORT_OWNER) |
274 | set_bit(port, &ehci->owned_ports); | |
275 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 276 | t2 |= PORT_SUSPEND; |
8c03356a AS |
277 | set_bit(port, &ehci->bus_suspended); |
278 | } | |
279 | ||
16032c4f | 280 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
281 | if (hcd->self.root_hub->do_remote_wakeup) { |
282 | /* only enable appropriate wake bits, otherwise the | |
283 | * hardware can not go phy low power mode. If a race | |
284 | * condition happens here(connection change during bits | |
285 | * set), the port change detection will finally fix it. | |
286 | */ | |
16032c4f | 287 | if (t1 & PORT_CONNECT) |
331ac6b2 | 288 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 289 | else |
331ac6b2 | 290 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 291 | } |
1da177e4 LT |
292 | |
293 | if (t1 != t2) { | |
3e8d6d85 AS |
294 | /* |
295 | * On some controllers, Wake-On-Disconnect will | |
296 | * generate false wakeup signals until the bus | |
297 | * switches over to full-speed idle. For their | |
298 | * sake, add a delay if we need one. | |
299 | */ | |
300 | if ((t2 & PORT_WKDISC_E) && | |
301 | ehci_port_speed(ehci, t2) == | |
302 | USB_PORT_STAT_HIGH_SPEED) | |
303 | fs_idle_delay = true; | |
083522d7 | 304 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
305 | changed = 1; |
306 | } | |
307 | } | |
3e8d6d85 AS |
308 | spin_unlock_irq(&ehci->lock); |
309 | ||
310 | if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { | |
311 | /* | |
312 | * Wait for HCD to enter low-power mode or for the bus | |
313 | * to switch to full-speed idle. | |
314 | */ | |
315 | usleep_range(5000, 5500); | |
316 | } | |
331ac6b2 | 317 | |
2cdcec4f | 318 | if (changed && ehci->has_tdi_phy_lpm) { |
16032c4f | 319 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
320 | port = HCS_N_PORTS(ehci->hcs_params); |
321 | while (port--) { | |
a46af4eb | 322 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f AS |
323 | u32 t3; |
324 | ||
16032c4f AS |
325 | t3 = ehci_readl(ehci, hostpc_reg); |
326 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
327 | t3 = ehci_readl(ehci, hostpc_reg); | |
328 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
329 | port, (t3 & HOSTPC_PHCD) ? |
330 | "succeeded" : "failed"); | |
1da177e4 | 331 | } |
3e8d6d85 | 332 | spin_unlock_irq(&ehci->lock); |
1da177e4 LT |
333 | } |
334 | ||
cd930c93 AS |
335 | /* Apparently some devices need a >= 1-uframe delay here */ |
336 | if (ehci->bus_suspended) | |
337 | udelay(150); | |
338 | ||
1da177e4 LT |
339 | /* turn off now-idle HC */ |
340 | ehci_halt (ehci); | |
c4f34764 AS |
341 | |
342 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
343 | if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
344 | ehci_handle_controller_death(ehci); | |
345 | if (ehci->rh_state != EHCI_RH_RUNNING) | |
346 | goto done; | |
e8799906 | 347 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1da177e4 | 348 | |
3c273a05 | 349 | end_unlink_async(ehci); |
2a40f324 | 350 | unlink_empty_async_suspended(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 | ||
515 | #else | |
516 | ||
0c0382e3 AS |
517 | #define ehci_bus_suspend NULL |
518 | #define ehci_bus_resume NULL | |
1da177e4 LT |
519 | |
520 | #endif /* CONFIG_PM */ | |
521 | ||
57e06c11 AS |
522 | /*-------------------------------------------------------------------------*/ |
523 | ||
57e06c11 | 524 | /* |
90da096e | 525 | * Sets the owner of a port |
57e06c11 | 526 | */ |
90da096e | 527 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 528 | { |
57e06c11 AS |
529 | u32 __iomem *status_reg; |
530 | u32 port_status; | |
90da096e | 531 | int try; |
57e06c11 | 532 | |
90da096e | 533 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
534 | |
535 | /* | |
536 | * The controller won't set the OWNER bit if the port is | |
537 | * enabled, so this loop will sometimes require at least two | |
538 | * iterations: one to disable the port and one to set OWNER. | |
539 | */ | |
57e06c11 AS |
540 | for (try = 4; try > 0; --try) { |
541 | spin_lock_irq(&ehci->lock); | |
542 | port_status = ehci_readl(ehci, status_reg); | |
543 | if ((port_status & PORT_OWNER) == new_owner | |
544 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
545 | == 0) | |
546 | try = 0; | |
547 | else { | |
548 | port_status ^= PORT_OWNER; | |
549 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
550 | ehci_writel(ehci, port_status, status_reg); | |
551 | } | |
552 | spin_unlock_irq(&ehci->lock); | |
553 | if (try > 1) | |
554 | msleep(5); | |
555 | } | |
90da096e BR |
556 | } |
557 | ||
1da177e4 LT |
558 | /*-------------------------------------------------------------------------*/ |
559 | ||
560 | static int check_reset_complete ( | |
561 | struct ehci_hcd *ehci, | |
562 | int index, | |
e6316565 | 563 | u32 __iomem *status_reg, |
1da177e4 LT |
564 | int port_status |
565 | ) { | |
cd4cdc93 | 566 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 567 | return port_status; |
1da177e4 LT |
568 | |
569 | /* if reset finished and it's still not enabled -- handoff */ | |
570 | if (!(port_status & PORT_PE)) { | |
571 | ||
572 | /* with integrated TT, there's nobody to hand it to! */ | |
573 | if (ehci_is_TDI(ehci)) { | |
574 | ehci_dbg (ehci, | |
575 | "Failed to enable port %d on root hub TT\n", | |
576 | index+1); | |
577 | return port_status; | |
578 | } | |
579 | ||
580 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
581 | index + 1); | |
582 | ||
583 | // what happens if HCS_N_CC(params) == 0 ? | |
584 | port_status |= PORT_OWNER; | |
10f6524a | 585 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 586 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 587 | |
796bcae7 VB |
588 | /* ensure 440EPX ohci controller state is operational */ |
589 | if (ehci->has_amcc_usb23) | |
590 | set_ohci_hcfs(ehci, 1); | |
591 | } else { | |
0ca7eb23 PC |
592 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
593 | index + 1); | |
796bcae7 VB |
594 | /* ensure 440EPx ohci controller state is suspended */ |
595 | if (ehci->has_amcc_usb23) | |
596 | set_ohci_hcfs(ehci, 0); | |
597 | } | |
1da177e4 LT |
598 | |
599 | return port_status; | |
600 | } | |
601 | ||
602 | /*-------------------------------------------------------------------------*/ | |
603 | ||
604 | ||
605 | /* build "status change" packet (one or two bytes) from HC registers */ | |
606 | ||
607 | static int | |
608 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
609 | { | |
610 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
a448e4dc | 611 | u32 temp, status; |
93f1a47c | 612 | u32 mask; |
1da177e4 LT |
613 | int ports, i, retval = 1; |
614 | unsigned long flags; | |
4dd405a4 | 615 | u32 ppcd = ~0; |
1da177e4 | 616 | |
1da177e4 LT |
617 | /* init status to no-changes */ |
618 | buf [0] = 0; | |
619 | ports = HCS_N_PORTS (ehci->hcs_params); | |
620 | if (ports > 7) { | |
621 | buf [1] = 0; | |
622 | retval++; | |
623 | } | |
53bd6a60 | 624 | |
a448e4dc AS |
625 | /* Inform the core about resumes-in-progress by returning |
626 | * a non-zero value even if there are no status changes. | |
627 | */ | |
628 | status = ehci->resuming_ports; | |
629 | ||
93f1a47c DB |
630 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
631 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 632 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
633 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
634 | * PORT_POWER; that's surprising, but maybe within-spec. | |
635 | */ | |
636 | if (!ignore_oc) | |
637 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
638 | else | |
639 | mask = PORT_CSC | PORT_PEC; | |
640 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
641 | ||
1da177e4 LT |
642 | /* no hub change reports (bit 0) for now (power, ...) */ |
643 | ||
644 | /* port N changes (bit N)? */ | |
645 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
646 | |
647 | /* get per-port change detect bits */ | |
648 | if (ehci->has_ppcd) | |
649 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
650 | ||
1da177e4 | 651 | for (i = 0; i < ports; i++) { |
5a9cdf33 | 652 | /* leverage per-port change bits feature */ |
4dd405a4 AS |
653 | if (ppcd & (1 << i)) |
654 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
655 | else | |
656 | temp = 0; | |
625b5c9a AS |
657 | |
658 | /* | |
659 | * Return status information even for ports with OWNER set. | |
37ebb549 | 660 | * Otherwise hub_wq wouldn't see the disconnect event when a |
625b5c9a AS |
661 | * high-speed device is switched over to the companion |
662 | * controller by the user. | |
663 | */ | |
664 | ||
eafe5b99 AS |
665 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
666 | || (ehci->reset_done[i] && time_after_eq( | |
667 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
668 | if (i < 7) |
669 | buf [0] |= 1 << (i + 1); | |
670 | else | |
671 | buf [1] |= 1 << (i - 7); | |
672 | status = STS_PCD; | |
673 | } | |
674 | } | |
ee74290b AS |
675 | |
676 | /* If a resume is in progress, make sure it can finish */ | |
677 | if (ehci->resuming_ports) | |
678 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); | |
679 | ||
1da177e4 LT |
680 | spin_unlock_irqrestore (&ehci->lock, flags); |
681 | return status ? retval : 0; | |
682 | } | |
683 | ||
684 | /*-------------------------------------------------------------------------*/ | |
685 | ||
686 | static void | |
687 | ehci_hub_descriptor ( | |
688 | struct ehci_hcd *ehci, | |
689 | struct usb_hub_descriptor *desc | |
690 | ) { | |
691 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
692 | u16 temp; | |
693 | ||
625a4c59 | 694 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 LT |
695 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ |
696 | desc->bHubContrCurrent = 0; | |
697 | ||
698 | desc->bNbrPorts = ports; | |
699 | temp = 1 + (ports / 8); | |
700 | desc->bDescLength = 7 + 2 * temp; | |
701 | ||
702 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
703 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
704 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 | 705 | |
3a2359ee | 706 | temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ |
1da177e4 | 707 | if (HCS_PPC (ehci->hcs_params)) |
3a2359ee | 708 | temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ |
56c1e26d | 709 | else |
3a2359ee | 710 | temp |= HUB_CHAR_NO_LPSM; /* no power switching */ |
1da177e4 LT |
711 | #if 0 |
712 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
713 | if (HCS_INDICATOR (ehci->hcs_params)) | |
3a2359ee | 714 | temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ |
1da177e4 | 715 | #endif |
fd05e720 | 716 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
717 | } |
718 | ||
9841f37a | 719 | /*-------------------------------------------------------------------------*/ |
726a85ca JP |
720 | #ifdef CONFIG_USB_HCD_TEST_MODE |
721 | ||
9841f37a MG |
722 | #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06 |
723 | ||
724 | static void usb_ehset_completion(struct urb *urb) | |
725 | { | |
726 | struct completion *done = urb->context; | |
727 | ||
728 | complete(done); | |
729 | } | |
730 | static int submit_single_step_set_feature( | |
731 | struct usb_hcd *hcd, | |
732 | struct urb *urb, | |
733 | int is_setup | |
734 | ); | |
735 | ||
736 | /* | |
737 | * Allocate and initialize a control URB. This request will be used by the | |
738 | * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages | |
739 | * of the GetDescriptor request are sent 15 seconds after the SETUP stage. | |
740 | * Return NULL if failed. | |
741 | */ | |
742 | static struct urb *request_single_step_set_feature_urb( | |
743 | struct usb_device *udev, | |
744 | void *dr, | |
745 | void *buf, | |
746 | struct completion *done | |
747 | ) { | |
748 | struct urb *urb; | |
749 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
750 | struct usb_host_endpoint *ep; | |
751 | ||
752 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
753 | if (!urb) | |
754 | return NULL; | |
755 | ||
756 | urb->pipe = usb_rcvctrlpipe(udev, 0); | |
757 | ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out) | |
758 | [usb_pipeendpoint(urb->pipe)]; | |
759 | if (!ep) { | |
760 | usb_free_urb(urb); | |
761 | return NULL; | |
762 | } | |
763 | ||
764 | urb->ep = ep; | |
765 | urb->dev = udev; | |
766 | urb->setup_packet = (void *)dr; | |
767 | urb->transfer_buffer = buf; | |
768 | urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; | |
769 | urb->complete = usb_ehset_completion; | |
770 | urb->status = -EINPROGRESS; | |
771 | urb->actual_length = 0; | |
772 | urb->transfer_flags = URB_DIR_IN; | |
773 | usb_get_urb(urb); | |
774 | atomic_inc(&urb->use_count); | |
775 | atomic_inc(&urb->dev->urbnum); | |
776 | urb->setup_dma = dma_map_single( | |
777 | hcd->self.controller, | |
778 | urb->setup_packet, | |
779 | sizeof(struct usb_ctrlrequest), | |
780 | DMA_TO_DEVICE); | |
781 | urb->transfer_dma = dma_map_single( | |
782 | hcd->self.controller, | |
783 | urb->transfer_buffer, | |
784 | urb->transfer_buffer_length, | |
785 | DMA_FROM_DEVICE); | |
786 | urb->context = done; | |
787 | return urb; | |
788 | } | |
789 | ||
790 | static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) | |
791 | { | |
792 | int retval = -ENOMEM; | |
793 | struct usb_ctrlrequest *dr; | |
794 | struct urb *urb; | |
795 | struct usb_device *udev; | |
796 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
797 | struct usb_device_descriptor *buf; | |
798 | DECLARE_COMPLETION_ONSTACK(done); | |
799 | ||
800 | /* Obtain udev of the rhub's child port */ | |
801 | udev = usb_hub_find_child(hcd->self.root_hub, port); | |
802 | if (!udev) { | |
803 | ehci_err(ehci, "No device attached to the RootHub\n"); | |
804 | return -ENODEV; | |
805 | } | |
806 | buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); | |
807 | if (!buf) | |
808 | return -ENOMEM; | |
809 | ||
810 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | |
811 | if (!dr) { | |
812 | kfree(buf); | |
813 | return -ENOMEM; | |
814 | } | |
815 | ||
816 | /* Fill Setup packet for GetDescriptor */ | |
817 | dr->bRequestType = USB_DIR_IN; | |
818 | dr->bRequest = USB_REQ_GET_DESCRIPTOR; | |
819 | dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); | |
820 | dr->wIndex = 0; | |
821 | dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); | |
822 | urb = request_single_step_set_feature_urb(udev, dr, buf, &done); | |
823 | if (!urb) | |
824 | goto cleanup; | |
825 | ||
826 | /* Submit just the SETUP stage */ | |
827 | retval = submit_single_step_set_feature(hcd, urb, 1); | |
828 | if (retval) | |
829 | goto out1; | |
830 | if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { | |
831 | usb_kill_urb(urb); | |
832 | retval = -ETIMEDOUT; | |
833 | ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__); | |
834 | goto out1; | |
835 | } | |
836 | msleep(15 * 1000); | |
837 | ||
838 | /* Complete remaining DATA and STATUS stages using the same URB */ | |
839 | urb->status = -EINPROGRESS; | |
840 | usb_get_urb(urb); | |
841 | atomic_inc(&urb->use_count); | |
842 | atomic_inc(&urb->dev->urbnum); | |
843 | retval = submit_single_step_set_feature(hcd, urb, 0); | |
844 | if (!retval && !wait_for_completion_timeout(&done, | |
845 | msecs_to_jiffies(2000))) { | |
846 | usb_kill_urb(urb); | |
847 | retval = -ETIMEDOUT; | |
848 | ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__); | |
849 | } | |
850 | out1: | |
851 | usb_free_urb(urb); | |
852 | cleanup: | |
853 | kfree(dr); | |
854 | kfree(buf); | |
855 | return retval; | |
856 | } | |
726a85ca | 857 | #endif /* CONFIG_USB_HCD_TEST_MODE */ |
1da177e4 LT |
858 | /*-------------------------------------------------------------------------*/ |
859 | ||
37769939 | 860 | int ehci_hub_control( |
1da177e4 LT |
861 | struct usb_hcd *hcd, |
862 | u16 typeReq, | |
863 | u16 wValue, | |
864 | u16 wIndex, | |
865 | char *buf, | |
866 | u16 wLength | |
867 | ) { | |
868 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
869 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
870 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
871 | (wIndex & 0xff) - 1]; | |
a46af4eb | 872 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1]; |
331ac6b2 | 873 | u32 temp, temp1, status; |
1da177e4 LT |
874 | unsigned long flags; |
875 | int retval = 0; | |
f0d7f273 | 876 | unsigned selector; |
1da177e4 LT |
877 | |
878 | /* | |
879 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
880 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
881 | * (track current state ourselves) ... blink for diagnostics, | |
882 | * power, "this is the one", etc. EHCI spec supports this. | |
883 | */ | |
884 | ||
885 | spin_lock_irqsave (&ehci->lock, flags); | |
886 | switch (typeReq) { | |
887 | case ClearHubFeature: | |
888 | switch (wValue) { | |
889 | case C_HUB_LOCAL_POWER: | |
890 | case C_HUB_OVER_CURRENT: | |
891 | /* no hub-wide feature/status flags */ | |
892 | break; | |
893 | default: | |
894 | goto error; | |
895 | } | |
896 | break; | |
897 | case ClearPortFeature: | |
898 | if (!wIndex || wIndex > ports) | |
899 | goto error; | |
900 | wIndex--; | |
e6316565 | 901 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 902 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
903 | |
904 | /* | |
905 | * Even if OWNER is set, so the port is owned by the | |
37ebb549 | 906 | * companion controller, hub_wq needs to be able to clear |
625b5c9a | 907 | * the port-change status bits (especially |
749da5f8 | 908 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 909 | */ |
1da177e4 LT |
910 | |
911 | switch (wValue) { | |
912 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 913 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
914 | break; |
915 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 916 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
917 | break; |
918 | case USB_PORT_FEAT_SUSPEND: | |
919 | if (temp & PORT_RESET) | |
920 | goto error; | |
f8aeb3bb DB |
921 | if (ehci->no_selective_suspend) |
922 | break; | |
83722bc9 AG |
923 | #ifdef CONFIG_USB_OTG |
924 | if ((hcd->self.otg_port == (wIndex + 1)) | |
925 | && hcd->self.b_hnp_enable) { | |
3d46e73d | 926 | otg_start_hnp(hcd->usb_phy->otg); |
83722bc9 AG |
927 | break; |
928 | } | |
929 | #endif | |
16032c4f AS |
930 | if (!(temp & PORT_SUSPEND)) |
931 | break; | |
932 | if ((temp & PORT_PE) == 0) | |
933 | goto error; | |
934 | ||
935 | /* clear phy low-power mode before resume */ | |
2cdcec4f | 936 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
937 | temp1 = ehci_readl(ehci, hostpc_reg); |
938 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 939 | hostpc_reg); |
16032c4f AS |
940 | spin_unlock_irqrestore(&ehci->lock, flags); |
941 | msleep(5);/* wait to leave low-power mode */ | |
942 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 943 | } |
16032c4f | 944 | /* resume signaling for 20 msec */ |
6d5f89c7 | 945 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
946 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
947 | ehci->reset_done[wIndex] = jiffies | |
ea16328f | 948 | + msecs_to_jiffies(USB_RESUME_TIMEOUT); |
3a20446f AS |
949 | set_bit(wIndex, &ehci->resuming_ports); |
950 | usb_hcd_start_port_resume(&hcd->self, wIndex); | |
1da177e4 LT |
951 | break; |
952 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 953 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
954 | break; |
955 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
956 | if (HCS_PPC(ehci->hcs_params)) { |
957 | spin_unlock_irqrestore(&ehci->lock, flags); | |
958 | ehci_port_power(ehci, wIndex, false); | |
959 | spin_lock_irqsave(&ehci->lock, flags); | |
960 | } | |
1da177e4 LT |
961 | break; |
962 | case USB_PORT_FEAT_C_CONNECTION: | |
6d5f89c7 | 963 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
964 | break; |
965 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 966 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
967 | break; |
968 | case USB_PORT_FEAT_C_RESET: | |
969 | /* GetPortStatus clears reset */ | |
970 | break; | |
971 | default: | |
972 | goto error; | |
973 | } | |
083522d7 | 974 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
975 | break; |
976 | case GetHubDescriptor: | |
977 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
978 | buf); | |
979 | break; | |
980 | case GetHubStatus: | |
981 | /* no hub-wide feature/status flags */ | |
982 | memset (buf, 0, 4); | |
983 | //cpu_to_le32s ((u32 *) buf); | |
984 | break; | |
985 | case GetPortStatus: | |
986 | if (!wIndex || wIndex > ports) | |
987 | goto error; | |
988 | wIndex--; | |
989 | status = 0; | |
e6316565 | 990 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
991 | |
992 | // wPortChange bits | |
993 | if (temp & PORT_CSC) | |
749da5f8 | 994 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 995 | if (temp & PORT_PEC) |
749da5f8 | 996 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
997 | |
998 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 999 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 1000 | |
756aa6b3 CE |
1001 | /* |
1002 | * Hubs should disable port power on over-current. | |
1003 | * However, not all EHCI implementations do this | |
1004 | * automatically, even if they _do_ support per-port | |
1005 | * power switching; they're allowed to just limit the | |
37ebb549 | 1006 | * current. hub_wq will turn the power back on. |
756aa6b3 | 1007 | */ |
e6604a7f CE |
1008 | if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
1009 | && HCS_PPC(ehci->hcs_params)) { | |
11a7e594 MG |
1010 | spin_unlock_irqrestore(&ehci->lock, flags); |
1011 | ehci_port_power(ehci, wIndex, false); | |
1012 | spin_lock_irqsave(&ehci->lock, flags); | |
81463c1d | 1013 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
1014 | } |
1015 | } | |
1016 | ||
6753f4cf AS |
1017 | /* no reset or resume pending */ |
1018 | if (!ehci->reset_done[wIndex]) { | |
629e4427 AS |
1019 | |
1020 | /* Remote Wakeup received? */ | |
6753f4cf | 1021 | if (temp & PORT_RESUME) { |
629e4427 AS |
1022 | /* resume signaling for 20 msec */ |
1023 | ehci->reset_done[wIndex] = jiffies | |
1024 | + msecs_to_jiffies(20); | |
f292e7f9 | 1025 | usb_hcd_start_port_resume(&hcd->self, wIndex); |
47a64a13 | 1026 | set_bit(wIndex, &ehci->resuming_ports); |
629e4427 AS |
1027 | /* check the port again */ |
1028 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
1029 | ehci->reset_done[wIndex]); | |
1030 | } | |
1da177e4 | 1031 | |
6753f4cf AS |
1032 | /* reset or resume not yet complete */ |
1033 | } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { | |
1034 | ; /* wait until it is complete */ | |
1035 | ||
1036 | /* resume completed */ | |
1037 | } else if (test_bit(wIndex, &ehci->resuming_ports)) { | |
1038 | clear_bit(wIndex, &ehci->suspended_ports); | |
1039 | set_bit(wIndex, &ehci->port_c_suspend); | |
1040 | ehci->reset_done[wIndex] = 0; | |
1041 | usb_hcd_end_port_resume(&hcd->self, wIndex); | |
1042 | ||
1043 | /* stop resume signaling */ | |
1044 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); | |
1045 | ehci_writel(ehci, temp, status_reg); | |
1046 | clear_bit(wIndex, &ehci->resuming_ports); | |
1047 | retval = ehci_handshake(ehci, status_reg, | |
1048 | PORT_RESUME, 0, 2000 /* 2msec */); | |
1049 | if (retval != 0) { | |
1050 | ehci_err(ehci, "port %d resume error %d\n", | |
629e4427 | 1051 | wIndex + 1, retval); |
6753f4cf | 1052 | goto error; |
1da177e4 | 1053 | } |
6753f4cf | 1054 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1055 | |
1056 | /* whoever resets must GetPortStatus to complete it!! */ | |
6753f4cf | 1057 | } else { |
749da5f8 | 1058 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 LT |
1059 | ehci->reset_done [wIndex] = 0; |
1060 | ||
1061 | /* force reset to complete */ | |
083522d7 | 1062 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 1063 | status_reg); |
c22fa3ac DB |
1064 | /* REVISIT: some hardware needs 550+ usec to clear |
1065 | * this bit; seems too long to spin routinely... | |
1066 | */ | |
2f3a6b86 | 1067 | retval = ehci_handshake(ehci, status_reg, |
6307e096 | 1068 | PORT_RESET, 0, 1000); |
1da177e4 LT |
1069 | if (retval != 0) { |
1070 | ehci_err (ehci, "port %d reset error %d\n", | |
1071 | wIndex + 1, retval); | |
1072 | goto error; | |
1073 | } | |
1074 | ||
1075 | /* see what we found out */ | |
e6316565 AS |
1076 | temp = check_reset_complete (ehci, wIndex, status_reg, |
1077 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
1078 | } |
1079 | ||
57e06c11 AS |
1080 | /* transfer dedicated ports to the companion hc */ |
1081 | if ((temp & PORT_CONNECT) && | |
1082 | test_bit(wIndex, &ehci->companion_ports)) { | |
1083 | temp &= ~PORT_RWC_BITS; | |
1084 | temp |= PORT_OWNER; | |
1085 | ehci_writel(ehci, temp, status_reg); | |
1086 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
1087 | temp = ehci_readl(ehci, status_reg); | |
1088 | } | |
1089 | ||
625b5c9a | 1090 | /* |
37ebb549 | 1091 | * Even if OWNER is set, there's no harm letting hub_wq |
625b5c9a AS |
1092 | * see the wPortStatus values (they should all be 0 except |
1093 | * for PORT_POWER anyway). | |
1094 | */ | |
1095 | ||
1096 | if (temp & PORT_CONNECT) { | |
749da5f8 | 1097 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 1098 | // status may be from integrated TT |
331ac6b2 AD |
1099 | if (ehci->has_hostpc) { |
1100 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1101 | status |= ehci_port_speed(ehci, temp1); | |
1102 | } else | |
1103 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 1104 | } |
625b5c9a | 1105 | if (temp & PORT_PE) |
749da5f8 | 1106 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
1107 | |
1108 | /* maybe the port was unsuspended without our knowledge */ | |
1109 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 1110 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
1111 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
1112 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 1113 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
1114 | ehci->reset_done[wIndex] = 0; |
1115 | if (temp & PORT_PE) | |
1116 | set_bit(wIndex, &ehci->port_c_suspend); | |
f292e7f9 | 1117 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
eafe5b99 AS |
1118 | } |
1119 | ||
625b5c9a | 1120 | if (temp & PORT_OC) |
749da5f8 | 1121 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 1122 | if (temp & PORT_RESET) |
749da5f8 | 1123 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 1124 | if (temp & PORT_POWER) |
749da5f8 | 1125 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 1126 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 1127 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 1128 | |
bbcd5cab ON |
1129 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
1130 | dbg_port(ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 1131 | put_unaligned_le32(status, buf); |
1da177e4 LT |
1132 | break; |
1133 | case SetHubFeature: | |
1134 | switch (wValue) { | |
1135 | case C_HUB_LOCAL_POWER: | |
1136 | case C_HUB_OVER_CURRENT: | |
1137 | /* no hub-wide feature/status flags */ | |
1138 | break; | |
1139 | default: | |
1140 | goto error; | |
1141 | } | |
1142 | break; | |
1143 | case SetPortFeature: | |
f0d7f273 DB |
1144 | selector = wIndex >> 8; |
1145 | wIndex &= 0xff; | |
8d053c79 JW |
1146 | if (unlikely(ehci->debug)) { |
1147 | /* If the debug port is active any port | |
1148 | * feature requests should get denied */ | |
1149 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
1150 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
1151 | retval = -ENODEV; | |
1152 | goto error_exit; | |
1153 | } | |
1154 | } | |
1da177e4 LT |
1155 | if (!wIndex || wIndex > ports) |
1156 | goto error; | |
1157 | wIndex--; | |
e6316565 | 1158 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1159 | if (temp & PORT_OWNER) |
1160 | break; | |
1161 | ||
10f6524a | 1162 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1163 | switch (wValue) { |
1164 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1165 | if (ehci->no_selective_suspend) |
1166 | break; | |
1da177e4 LT |
1167 | if ((temp & PORT_PE) == 0 |
1168 | || (temp & PORT_RESET) != 0) | |
1169 | goto error; | |
b9df7942 | 1170 | |
331ac6b2 AD |
1171 | /* After above check the port must be connected. |
1172 | * Set appropriate bit thus could put phy into low power | |
2cdcec4f | 1173 | * mode if we have tdi_phy_lpm feature |
331ac6b2 | 1174 | */ |
b9df7942 AD |
1175 | temp &= ~PORT_WKCONN_E; |
1176 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1177 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
2cdcec4f | 1178 | if (ehci->has_tdi_phy_lpm) { |
b9df7942 | 1179 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1180 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1181 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1182 | temp1 = ehci_readl(ehci, hostpc_reg); |
1183 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1184 | hostpc_reg); | |
1185 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1186 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1187 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1188 | "succeeded" : "failed"); | |
1189 | } | |
eafe5b99 | 1190 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1191 | break; |
1192 | case USB_PORT_FEAT_POWER: | |
11a7e594 MG |
1193 | if (HCS_PPC(ehci->hcs_params)) { |
1194 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1195 | ehci_port_power(ehci, wIndex, true); | |
1196 | spin_lock_irqsave(&ehci->lock, flags); | |
1197 | } | |
1da177e4 LT |
1198 | break; |
1199 | case USB_PORT_FEAT_RESET: | |
6753f4cf | 1200 | if (temp & (PORT_SUSPEND|PORT_RESUME)) |
1da177e4 LT |
1201 | goto error; |
1202 | /* line status bits may report this as low speed, | |
1203 | * which can be fine if this root hub has a | |
1204 | * transaction translator built in. | |
1205 | */ | |
1206 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1207 | && !ehci_is_TDI(ehci) | |
1208 | && PORT_USB11 (temp)) { | |
1209 | ehci_dbg (ehci, | |
1210 | "port %d low speed --> companion\n", | |
1211 | wIndex + 1); | |
1212 | temp |= PORT_OWNER; | |
1213 | } else { | |
1da177e4 LT |
1214 | temp |= PORT_RESET; |
1215 | temp &= ~PORT_PE; | |
1216 | ||
1217 | /* | |
1218 | * caller must wait, then call GetPortStatus | |
1219 | * usb 2.0 spec says 50 ms resets on root | |
1220 | */ | |
1221 | ehci->reset_done [wIndex] = jiffies | |
1222 | + msecs_to_jiffies (50); | |
1223 | } | |
e6316565 | 1224 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1225 | break; |
f0d7f273 DB |
1226 | |
1227 | /* For downstream facing ports (these): one hub port is put | |
1228 | * into test mode according to USB2 11.24.2.13, then the hub | |
1229 | * must be reset (which for root hub now means rmmod+modprobe, | |
1230 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1231 | * about the EHCI-specific stuff. | |
1232 | */ | |
1233 | case USB_PORT_FEAT_TEST: | |
726a85ca | 1234 | #ifdef CONFIG_USB_HCD_TEST_MODE |
9841f37a MG |
1235 | if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
1236 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1237 | retval = ehset_single_step_set_feature(hcd, | |
5cbcc35e | 1238 | wIndex + 1); |
9841f37a MG |
1239 | spin_lock_irqsave(&ehci->lock, flags); |
1240 | break; | |
726a85ca JP |
1241 | } |
1242 | #endif | |
1243 | if (!selector || selector > 5) | |
f0d7f273 | 1244 | goto error; |
c4f34764 | 1245 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1246 | ehci_quiesce(ehci); |
c4f34764 | 1247 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
1248 | |
1249 | /* Put all enabled ports into suspend */ | |
1250 | while (ports--) { | |
1251 | u32 __iomem *sreg = | |
1252 | &ehci->regs->port_status[ports]; | |
1253 | ||
1254 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; | |
1255 | if (temp & PORT_PE) | |
1256 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1257 | sreg); | |
1258 | } | |
c4f34764 AS |
1259 | |
1260 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1261 | ehci_halt(ehci); |
c4f34764 AS |
1262 | spin_lock_irqsave(&ehci->lock, flags); |
1263 | ||
77636c86 | 1264 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1265 | temp |= selector << 16; |
e6316565 | 1266 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1267 | break; |
1268 | ||
1da177e4 LT |
1269 | default: |
1270 | goto error; | |
1271 | } | |
083522d7 | 1272 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1273 | break; |
1274 | ||
1275 | default: | |
1276 | error: | |
1277 | /* "stall" on error */ | |
1278 | retval = -EPIPE; | |
1279 | } | |
8d053c79 | 1280 | error_exit: |
1da177e4 LT |
1281 | spin_unlock_irqrestore (&ehci->lock, flags); |
1282 | return retval; | |
1283 | } | |
37769939 | 1284 | EXPORT_SYMBOL_GPL(ehci_hub_control); |
90da096e | 1285 | |
3e023203 | 1286 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
90da096e BR |
1287 | { |
1288 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1289 | ||
1290 | if (ehci_is_TDI(ehci)) | |
1291 | return; | |
1292 | set_owner(ehci, --portnum, PORT_OWNER); | |
1293 | } | |
1294 | ||
3e023203 | 1295 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
3a31155c AS |
1296 | { |
1297 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1298 | u32 __iomem *reg; | |
1299 | ||
1300 | if (ehci_is_TDI(ehci)) | |
1301 | return 0; | |
1302 | reg = &ehci->regs->port_status[portnum - 1]; | |
1303 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1304 | } | |
11a7e594 MG |
1305 | |
1306 | static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) | |
1307 | { | |
1308 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
1309 | u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; | |
1310 | u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; | |
1311 | ||
1312 | if (enable) | |
1313 | ehci_writel(ehci, temp | PORT_POWER, status_reg); | |
1314 | else | |
1315 | ehci_writel(ehci, temp & ~PORT_POWER, status_reg); | |
1316 | ||
1317 | if (hcd->driver->port_power) | |
1318 | hcd->driver->port_power(hcd, portnum, enable); | |
1319 | ||
1320 | return 0; | |
1321 | } |