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Commit | Line | Data |
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1da177e4 | 1 | /* |
d49d4317 | 2 | * Copyright (C) 2001-2004 by David Brownell |
53bd6a60 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* this file is part of ehci-hcd.c */ | |
20 | ||
21 | /*-------------------------------------------------------------------------*/ | |
22 | ||
23 | /* | |
24 | * EHCI Root Hub ... the nonsharable stuff | |
25 | * | |
26 | * Registers don't need cpu_to_le32, that happens transparently | |
27 | */ | |
28 | ||
29 | /*-------------------------------------------------------------------------*/ | |
83722bc9 | 30 | #include <linux/usb/otg.h> |
1da177e4 | 31 | |
58a97ffe AS |
32 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
33 | ||
aff6d18f AS |
34 | #ifdef CONFIG_PM |
35 | ||
383975d7 AS |
36 | static int ehci_hub_control( |
37 | struct usb_hcd *hcd, | |
38 | u16 typeReq, | |
39 | u16 wValue, | |
40 | u16 wIndex, | |
41 | char *buf, | |
42 | u16 wLength | |
43 | ); | |
44 | ||
45 | /* After a power loss, ports that were owned by the companion must be | |
46 | * reset so that the companion can still own them. | |
47 | */ | |
48 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
49 | { | |
50 | u32 __iomem *reg; | |
51 | u32 status; | |
52 | int port; | |
53 | __le32 buf; | |
54 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
55 | ||
56 | if (!ehci->owned_ports) | |
57 | return; | |
58 | ||
c73cee71 AS |
59 | /* Make sure the ports are powered */ |
60 | port = HCS_N_PORTS(ehci->hcs_params); | |
61 | while (port--) { | |
62 | if (test_bit(port, &ehci->owned_ports)) { | |
63 | reg = &ehci->regs->port_status[port]; | |
64 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
65 | if (!(status & PORT_POWER)) { | |
66 | status |= PORT_POWER; | |
67 | ehci_writel(ehci, status, reg); | |
68 | } | |
69 | } | |
70 | } | |
71 | ||
383975d7 AS |
72 | /* Give the connections some time to appear */ |
73 | msleep(20); | |
74 | ||
c4f34764 | 75 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
76 | port = HCS_N_PORTS(ehci->hcs_params); |
77 | while (port--) { | |
78 | if (test_bit(port, &ehci->owned_ports)) { | |
79 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 80 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
81 | |
82 | /* Port already owned by companion? */ | |
83 | if (status & PORT_OWNER) | |
84 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
85 | else if (test_bit(port, &ehci->companion_ports)) |
86 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
c4f34764 AS |
87 | else { |
88 | spin_unlock_irq(&ehci->lock); | |
383975d7 AS |
89 | ehci_hub_control(hcd, SetPortFeature, |
90 | USB_PORT_FEAT_RESET, port + 1, | |
91 | NULL, 0); | |
c4f34764 AS |
92 | spin_lock_irq(&ehci->lock); |
93 | } | |
383975d7 AS |
94 | } |
95 | } | |
c4f34764 | 96 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
97 | |
98 | if (!ehci->owned_ports) | |
99 | return; | |
100 | msleep(90); /* Wait for resets to complete */ | |
101 | ||
c4f34764 | 102 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
103 | port = HCS_N_PORTS(ehci->hcs_params); |
104 | while (port--) { | |
105 | if (test_bit(port, &ehci->owned_ports)) { | |
c4f34764 | 106 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
107 | ehci_hub_control(hcd, GetPortStatus, |
108 | 0, port + 1, | |
109 | (char *) &buf, sizeof(buf)); | |
c4f34764 | 110 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
111 | |
112 | /* The companion should now own the port, | |
113 | * but if something went wrong the port must not | |
114 | * remain enabled. | |
115 | */ | |
116 | reg = &ehci->regs->port_status[port]; | |
117 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
118 | if (status & PORT_OWNER) | |
119 | ehci_writel(ehci, status | PORT_CSC, reg); | |
120 | else { | |
121 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
122 | port + 1, status); | |
123 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | ehci->owned_ports = 0; | |
c4f34764 | 129 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
130 | } |
131 | ||
c5cf9212 | 132 | static int ehci_port_change(struct ehci_hcd *ehci) |
294d95f2 MG |
133 | { |
134 | int i = HCS_N_PORTS(ehci->hcs_params); | |
135 | ||
136 | /* First check if the controller indicates a change event */ | |
137 | ||
138 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) | |
139 | return 1; | |
140 | ||
141 | /* | |
142 | * Not all controllers appear to update this while going from D3 to D0, | |
143 | * so check the individual port status registers as well | |
144 | */ | |
145 | ||
146 | while (i--) | |
147 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) | |
148 | return 1; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
c5cf9212 | 153 | static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 154 | bool suspending, bool do_wakeup) |
16032c4f AS |
155 | { |
156 | int port; | |
157 | u32 temp; | |
158 | ||
159 | /* If remote wakeup is enabled for the root hub but disabled | |
160 | * for the controller, we must adjust all the port wakeup flags | |
161 | * when the controller is suspended or resumed. In all other | |
162 | * cases they don't need to be changed. | |
163 | */ | |
4147200d | 164 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
165 | return; |
166 | ||
c4f34764 | 167 | spin_lock_irq(&ehci->lock); |
148fc55f | 168 | |
16032c4f AS |
169 | /* clear phy low-power mode before changing wakeup flags */ |
170 | if (ehci->has_hostpc) { | |
171 | port = HCS_N_PORTS(ehci->hcs_params); | |
172 | while (port--) { | |
a46af4eb | 173 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 174 | |
16032c4f AS |
175 | temp = ehci_readl(ehci, hostpc_reg); |
176 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
177 | } | |
c4f34764 | 178 | spin_unlock_irq(&ehci->lock); |
16032c4f | 179 | msleep(5); |
c4f34764 | 180 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
181 | } |
182 | ||
183 | port = HCS_N_PORTS(ehci->hcs_params); | |
184 | while (port--) { | |
185 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
186 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
187 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
188 | ||
189 | /* If we are suspending the controller, clear the flags. | |
190 | * If we are resuming the controller, set the wakeup flags. | |
191 | */ | |
192 | if (!suspending) { | |
193 | if (t1 & PORT_CONNECT) | |
194 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
195 | else | |
196 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
197 | } | |
198 | ehci_vdbg(ehci, "port %d, %08x -> %08x\n", | |
199 | port + 1, t1, t2); | |
200 | ehci_writel(ehci, t2, reg); | |
201 | } | |
202 | ||
203 | /* enter phy low-power mode again */ | |
204 | if (ehci->has_hostpc) { | |
205 | port = HCS_N_PORTS(ehci->hcs_params); | |
206 | while (port--) { | |
a46af4eb | 207 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 208 | |
16032c4f AS |
209 | temp = ehci_readl(ehci, hostpc_reg); |
210 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
211 | } | |
212 | } | |
ee0b9be8 AS |
213 | |
214 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 215 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 216 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f | 217 | |
c4f34764 | 218 | spin_unlock_irq(&ehci->lock); |
16032c4f AS |
219 | } |
220 | ||
0c0382e3 | 221 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
222 | { |
223 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
224 | int port; | |
8c03356a | 225 | int mask; |
16032c4f | 226 | int changed; |
1da177e4 | 227 | |
8c774fe8 AS |
228 | ehci_dbg(ehci, "suspend root hub\n"); |
229 | ||
1da177e4 LT |
230 | if (time_before (jiffies, ehci->next_statechange)) |
231 | msleep(5); | |
232 | ||
c4f34764 AS |
233 | /* stop the schedules */ |
234 | ehci_quiesce(ehci); | |
235 | ||
1da177e4 | 236 | spin_lock_irq (&ehci->lock); |
43fe3a99 AS |
237 | if (ehci->rh_state < EHCI_RH_RUNNING) |
238 | goto done; | |
1da177e4 | 239 | |
cec3a53c AS |
240 | /* Once the controller is stopped, port resumes that are already |
241 | * in progress won't complete. Hence if remote wakeup is enabled | |
242 | * for the root hub and any ports are in the middle of a resume or | |
243 | * remote wakeup, we must fail the suspend. | |
244 | */ | |
245 | if (hcd->self.root_hub->do_remote_wakeup) { | |
a448e4dc AS |
246 | if (ehci->resuming_ports) { |
247 | spin_unlock_irq(&ehci->lock); | |
248 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); | |
249 | return -EBUSY; | |
cec3a53c AS |
250 | } |
251 | } | |
252 | ||
8c03356a AS |
253 | /* Unlike other USB host controller types, EHCI doesn't have |
254 | * any notion of "global" or bus-wide suspend. The driver has | |
255 | * to manually suspend all the active unsuspended ports, and | |
256 | * then manually resume them in the bus_resume() routine. | |
257 | */ | |
258 | ehci->bus_suspended = 0; | |
383975d7 | 259 | ehci->owned_ports = 0; |
16032c4f | 260 | changed = 0; |
cec3a53c | 261 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
262 | while (port--) { |
263 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 264 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 265 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 266 | |
8c03356a | 267 | /* keep track of which ports we suspend */ |
383975d7 AS |
268 | if (t1 & PORT_OWNER) |
269 | set_bit(port, &ehci->owned_ports); | |
270 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 271 | t2 |= PORT_SUSPEND; |
8c03356a AS |
272 | set_bit(port, &ehci->bus_suspended); |
273 | } | |
274 | ||
16032c4f | 275 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
276 | if (hcd->self.root_hub->do_remote_wakeup) { |
277 | /* only enable appropriate wake bits, otherwise the | |
278 | * hardware can not go phy low power mode. If a race | |
279 | * condition happens here(connection change during bits | |
280 | * set), the port change detection will finally fix it. | |
281 | */ | |
16032c4f | 282 | if (t1 & PORT_CONNECT) |
331ac6b2 | 283 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 284 | else |
331ac6b2 | 285 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 286 | } |
1da177e4 LT |
287 | |
288 | if (t1 != t2) { | |
289 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
290 | port + 1, t1, t2); | |
083522d7 | 291 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
292 | changed = 1; |
293 | } | |
294 | } | |
331ac6b2 | 295 | |
16032c4f AS |
296 | if (changed && ehci->has_hostpc) { |
297 | spin_unlock_irq(&ehci->lock); | |
298 | msleep(5); /* 5 ms for HCD to enter low-power mode */ | |
299 | spin_lock_irq(&ehci->lock); | |
300 | ||
301 | port = HCS_N_PORTS(ehci->hcs_params); | |
302 | while (port--) { | |
a46af4eb | 303 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f AS |
304 | u32 t3; |
305 | ||
16032c4f AS |
306 | t3 = ehci_readl(ehci, hostpc_reg); |
307 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
308 | t3 = ehci_readl(ehci, hostpc_reg); | |
309 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
310 | port, (t3 & HOSTPC_PHCD) ? |
311 | "succeeded" : "failed"); | |
1da177e4 LT |
312 | } |
313 | } | |
c4f34764 | 314 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 315 | |
cd930c93 AS |
316 | /* Apparently some devices need a >= 1-uframe delay here */ |
317 | if (ehci->bus_suspended) | |
318 | udelay(150); | |
319 | ||
1da177e4 LT |
320 | /* turn off now-idle HC */ |
321 | ehci_halt (ehci); | |
c4f34764 AS |
322 | |
323 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
324 | if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
325 | ehci_handle_controller_death(ehci); | |
326 | if (ehci->rh_state != EHCI_RH_RUNNING) | |
327 | goto done; | |
e8799906 | 328 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1da177e4 | 329 | |
3c273a05 | 330 | end_unlink_async(ehci); |
32830f20 | 331 | unlink_empty_async(ehci); |
df202255 | 332 | ehci_handle_intr_unlinks(ehci); |
55934eb3 | 333 | end_free_itds(ehci); |
cdc647a9 | 334 | |
8c03356a AS |
335 | /* allow remote wakeup */ |
336 | mask = INTR_MASK; | |
58a97ffe | 337 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 338 | mask &= ~STS_PCD; |
083522d7 BH |
339 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
340 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 341 | |
43fe3a99 | 342 | done: |
1da177e4 | 343 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
d58b4bcc AS |
344 | ehci->enabled_hrtimer_events = 0; |
345 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
1da177e4 | 346 | spin_unlock_irq (&ehci->lock); |
015798b2 | 347 | |
d58b4bcc | 348 | hrtimer_cancel(&ehci->hrtimer); |
1da177e4 LT |
349 | return 0; |
350 | } | |
351 | ||
352 | ||
353 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 354 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
355 | { |
356 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
357 | u32 temp; | |
383975d7 | 358 | u32 power_okay; |
1da177e4 | 359 | int i; |
d0f2fb25 | 360 | unsigned long resume_needed = 0; |
1da177e4 LT |
361 | |
362 | if (time_before (jiffies, ehci->next_statechange)) | |
363 | msleep(5); | |
364 | spin_lock_irq (&ehci->lock); | |
43fe3a99 AS |
365 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
366 | goto shutdown; | |
1da177e4 | 367 | |
ad45f1dc | 368 | if (unlikely(ehci->debug)) { |
9fa5780b | 369 | if (!dbgp_reset_prep(hcd)) |
ad45f1dc JW |
370 | ehci->debug = NULL; |
371 | else | |
9fa5780b | 372 | dbgp_external_startup(hcd); |
ad45f1dc JW |
373 | } |
374 | ||
f03c17fc DB |
375 | /* Ideally and we've got a real resume here, and no port's power |
376 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
377 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
378 | * the last user of the controller, not reset/pm hardware keeping | |
379 | * state we gave to it. | |
380 | */ | |
383975d7 AS |
381 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
382 | ehci_dbg(ehci, "resume root hub%s\n", | |
383 | power_okay ? "" : " after power loss"); | |
f03c17fc | 384 | |
8c03356a AS |
385 | /* at least some APM implementations will try to deliver |
386 | * IRQs right away, so delay them until we're ready. | |
387 | */ | |
083522d7 | 388 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
389 | |
390 | /* re-init operational registers */ | |
083522d7 BH |
391 | ehci_writel(ehci, 0, &ehci->regs->segment); |
392 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
393 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
394 | |
395 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
3d9545cc | 396 | ehci->command |= CMD_RUN; |
083522d7 | 397 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
e8799906 | 398 | ehci->rh_state = EHCI_RH_RUNNING; |
1da177e4 | 399 | |
6273f181 PC |
400 | /* |
401 | * According to Bugzilla #8190, the port status for some controllers | |
402 | * will be wrong without a delay. At their wrong status, the port | |
403 | * is enabled, but not suspended neither resumed. | |
404 | */ | |
405 | i = HCS_N_PORTS(ehci->hcs_params); | |
406 | while (i--) { | |
407 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
408 | if ((temp & PORT_PE) && | |
409 | !(temp & (PORT_SUSPEND | PORT_RESUME))) { | |
410 | ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); | |
411 | spin_unlock_irq(&ehci->lock); | |
412 | msleep(8); | |
413 | spin_lock_irq(&ehci->lock); | |
414 | break; | |
415 | } | |
416 | } | |
417 | ||
43fe3a99 AS |
418 | if (ehci->shutdown) |
419 | goto shutdown; | |
e198a314 | 420 | |
16032c4f AS |
421 | /* clear phy low-power mode before resume */ |
422 | if (ehci->bus_suspended && ehci->has_hostpc) { | |
423 | i = HCS_N_PORTS(ehci->hcs_params); | |
424 | while (i--) { | |
425 | if (test_bit(i, &ehci->bus_suspended)) { | |
a46af4eb AS |
426 | u32 __iomem *hostpc_reg = |
427 | &ehci->regs->hostpc[i]; | |
16032c4f | 428 | |
16032c4f AS |
429 | temp = ehci_readl(ehci, hostpc_reg); |
430 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
431 | hostpc_reg); | |
432 | } | |
433 | } | |
434 | spin_unlock_irq(&ehci->lock); | |
435 | msleep(5); | |
436 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
437 | if (ehci->shutdown) |
438 | goto shutdown; | |
16032c4f AS |
439 | } |
440 | ||
8c03356a | 441 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
442 | i = HCS_N_PORTS (ehci->hcs_params); |
443 | while (i--) { | |
083522d7 | 444 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 445 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 446 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 447 | (temp & PORT_SUSPEND)) { |
1da177e4 | 448 | temp |= PORT_RESUME; |
d0f2fb25 | 449 | set_bit(i, &resume_needed); |
3a4e72cb | 450 | } |
083522d7 | 451 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 452 | } |
3a4e72cb VP |
453 | |
454 | /* msleep for 20ms only if code is trying to resume port */ | |
455 | if (resume_needed) { | |
456 | spin_unlock_irq(&ehci->lock); | |
457 | msleep(20); | |
458 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
459 | if (ehci->shutdown) |
460 | goto shutdown; | |
3a4e72cb VP |
461 | } |
462 | ||
1da177e4 | 463 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 464 | while (i--) { |
083522d7 | 465 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
d0f2fb25 | 466 | if (test_bit(i, &resume_needed)) { |
8c03356a | 467 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); |
083522d7 | 468 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
469 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
470 | } | |
1da177e4 | 471 | } |
1da177e4 LT |
472 | |
473 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
c4f34764 AS |
474 | spin_unlock_irq(&ehci->lock); |
475 | ||
476 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
477 | |
478 | /* Now we can safely re-enable irqs */ | |
43fe3a99 AS |
479 | spin_lock_irq(&ehci->lock); |
480 | if (ehci->shutdown) | |
481 | goto shutdown; | |
083522d7 | 482 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
15be105b | 483 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
43fe3a99 | 484 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 485 | |
1da177e4 | 486 | return 0; |
43fe3a99 AS |
487 | |
488 | shutdown: | |
489 | spin_unlock_irq(&ehci->lock); | |
490 | return -ESHUTDOWN; | |
1da177e4 LT |
491 | } |
492 | ||
493 | #else | |
494 | ||
0c0382e3 AS |
495 | #define ehci_bus_suspend NULL |
496 | #define ehci_bus_resume NULL | |
1da177e4 LT |
497 | |
498 | #endif /* CONFIG_PM */ | |
499 | ||
57e06c11 AS |
500 | /*-------------------------------------------------------------------------*/ |
501 | ||
57e06c11 | 502 | /* |
90da096e | 503 | * Sets the owner of a port |
57e06c11 | 504 | */ |
90da096e | 505 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 506 | { |
57e06c11 AS |
507 | u32 __iomem *status_reg; |
508 | u32 port_status; | |
90da096e | 509 | int try; |
57e06c11 | 510 | |
90da096e | 511 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
512 | |
513 | /* | |
514 | * The controller won't set the OWNER bit if the port is | |
515 | * enabled, so this loop will sometimes require at least two | |
516 | * iterations: one to disable the port and one to set OWNER. | |
517 | */ | |
57e06c11 AS |
518 | for (try = 4; try > 0; --try) { |
519 | spin_lock_irq(&ehci->lock); | |
520 | port_status = ehci_readl(ehci, status_reg); | |
521 | if ((port_status & PORT_OWNER) == new_owner | |
522 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
523 | == 0) | |
524 | try = 0; | |
525 | else { | |
526 | port_status ^= PORT_OWNER; | |
527 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
528 | ehci_writel(ehci, port_status, status_reg); | |
529 | } | |
530 | spin_unlock_irq(&ehci->lock); | |
531 | if (try > 1) | |
532 | msleep(5); | |
533 | } | |
90da096e BR |
534 | } |
535 | ||
1da177e4 LT |
536 | /*-------------------------------------------------------------------------*/ |
537 | ||
538 | static int check_reset_complete ( | |
539 | struct ehci_hcd *ehci, | |
540 | int index, | |
e6316565 | 541 | u32 __iomem *status_reg, |
1da177e4 LT |
542 | int port_status |
543 | ) { | |
cd4cdc93 | 544 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 545 | return port_status; |
1da177e4 LT |
546 | |
547 | /* if reset finished and it's still not enabled -- handoff */ | |
548 | if (!(port_status & PORT_PE)) { | |
549 | ||
550 | /* with integrated TT, there's nobody to hand it to! */ | |
551 | if (ehci_is_TDI(ehci)) { | |
552 | ehci_dbg (ehci, | |
553 | "Failed to enable port %d on root hub TT\n", | |
554 | index+1); | |
555 | return port_status; | |
556 | } | |
557 | ||
558 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
559 | index + 1); | |
560 | ||
561 | // what happens if HCS_N_CC(params) == 0 ? | |
562 | port_status |= PORT_OWNER; | |
10f6524a | 563 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 564 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 565 | |
796bcae7 VB |
566 | /* ensure 440EPX ohci controller state is operational */ |
567 | if (ehci->has_amcc_usb23) | |
568 | set_ohci_hcfs(ehci, 1); | |
569 | } else { | |
0ca7eb23 PC |
570 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
571 | index + 1); | |
796bcae7 VB |
572 | /* ensure 440EPx ohci controller state is suspended */ |
573 | if (ehci->has_amcc_usb23) | |
574 | set_ohci_hcfs(ehci, 0); | |
575 | } | |
1da177e4 LT |
576 | |
577 | return port_status; | |
578 | } | |
579 | ||
580 | /*-------------------------------------------------------------------------*/ | |
581 | ||
582 | ||
583 | /* build "status change" packet (one or two bytes) from HC registers */ | |
584 | ||
585 | static int | |
586 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
587 | { | |
588 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
a448e4dc | 589 | u32 temp, status; |
93f1a47c | 590 | u32 mask; |
1da177e4 LT |
591 | int ports, i, retval = 1; |
592 | unsigned long flags; | |
5a9cdf33 | 593 | u32 ppcd = 0; |
1da177e4 | 594 | |
1da177e4 LT |
595 | /* init status to no-changes */ |
596 | buf [0] = 0; | |
597 | ports = HCS_N_PORTS (ehci->hcs_params); | |
598 | if (ports > 7) { | |
599 | buf [1] = 0; | |
600 | retval++; | |
601 | } | |
53bd6a60 | 602 | |
a448e4dc AS |
603 | /* Inform the core about resumes-in-progress by returning |
604 | * a non-zero value even if there are no status changes. | |
605 | */ | |
606 | status = ehci->resuming_ports; | |
607 | ||
93f1a47c DB |
608 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
609 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 610 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
611 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
612 | * PORT_POWER; that's surprising, but maybe within-spec. | |
613 | */ | |
614 | if (!ignore_oc) | |
615 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
616 | else | |
617 | mask = PORT_CSC | PORT_PEC; | |
618 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
619 | ||
1da177e4 LT |
620 | /* no hub change reports (bit 0) for now (power, ...) */ |
621 | ||
622 | /* port N changes (bit N)? */ | |
623 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
624 | |
625 | /* get per-port change detect bits */ | |
626 | if (ehci->has_ppcd) | |
627 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
628 | ||
1da177e4 | 629 | for (i = 0; i < ports; i++) { |
5a9cdf33 AD |
630 | /* leverage per-port change bits feature */ |
631 | if (ehci->has_ppcd && !(ppcd & (1 << i))) | |
632 | continue; | |
083522d7 | 633 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
634 | |
635 | /* | |
636 | * Return status information even for ports with OWNER set. | |
637 | * Otherwise khubd wouldn't see the disconnect event when a | |
638 | * high-speed device is switched over to the companion | |
639 | * controller by the user. | |
640 | */ | |
641 | ||
eafe5b99 AS |
642 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
643 | || (ehci->reset_done[i] && time_after_eq( | |
644 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
645 | if (i < 7) |
646 | buf [0] |= 1 << (i + 1); | |
647 | else | |
648 | buf [1] |= 1 << (i - 7); | |
649 | status = STS_PCD; | |
650 | } | |
651 | } | |
652 | /* FIXME autosuspend idle root hubs */ | |
653 | spin_unlock_irqrestore (&ehci->lock, flags); | |
654 | return status ? retval : 0; | |
655 | } | |
656 | ||
657 | /*-------------------------------------------------------------------------*/ | |
658 | ||
659 | static void | |
660 | ehci_hub_descriptor ( | |
661 | struct ehci_hcd *ehci, | |
662 | struct usb_hub_descriptor *desc | |
663 | ) { | |
664 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
665 | u16 temp; | |
666 | ||
667 | desc->bDescriptorType = 0x29; | |
668 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
669 | desc->bHubContrCurrent = 0; | |
670 | ||
671 | desc->bNbrPorts = ports; | |
672 | temp = 1 + (ports / 8); | |
673 | desc->bDescLength = 7 + 2 * temp; | |
674 | ||
675 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
676 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
677 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 LT |
678 | |
679 | temp = 0x0008; /* per-port overcurrent reporting */ | |
680 | if (HCS_PPC (ehci->hcs_params)) | |
681 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
682 | else |
683 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
684 | #if 0 |
685 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
686 | if (HCS_INDICATOR (ehci->hcs_params)) | |
687 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
688 | #endif | |
fd05e720 | 689 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
690 | } |
691 | ||
692 | /*-------------------------------------------------------------------------*/ | |
693 | ||
1da177e4 LT |
694 | static int ehci_hub_control ( |
695 | struct usb_hcd *hcd, | |
696 | u16 typeReq, | |
697 | u16 wValue, | |
698 | u16 wIndex, | |
699 | char *buf, | |
700 | u16 wLength | |
701 | ) { | |
702 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
703 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
704 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
705 | (wIndex & 0xff) - 1]; | |
a46af4eb | 706 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1]; |
331ac6b2 | 707 | u32 temp, temp1, status; |
1da177e4 LT |
708 | unsigned long flags; |
709 | int retval = 0; | |
f0d7f273 | 710 | unsigned selector; |
1da177e4 LT |
711 | |
712 | /* | |
713 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
714 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
715 | * (track current state ourselves) ... blink for diagnostics, | |
716 | * power, "this is the one", etc. EHCI spec supports this. | |
717 | */ | |
718 | ||
719 | spin_lock_irqsave (&ehci->lock, flags); | |
720 | switch (typeReq) { | |
721 | case ClearHubFeature: | |
722 | switch (wValue) { | |
723 | case C_HUB_LOCAL_POWER: | |
724 | case C_HUB_OVER_CURRENT: | |
725 | /* no hub-wide feature/status flags */ | |
726 | break; | |
727 | default: | |
728 | goto error; | |
729 | } | |
730 | break; | |
731 | case ClearPortFeature: | |
732 | if (!wIndex || wIndex > ports) | |
733 | goto error; | |
734 | wIndex--; | |
e6316565 | 735 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 736 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
737 | |
738 | /* | |
739 | * Even if OWNER is set, so the port is owned by the | |
740 | * companion controller, khubd needs to be able to clear | |
741 | * the port-change status bits (especially | |
749da5f8 | 742 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 743 | */ |
1da177e4 LT |
744 | |
745 | switch (wValue) { | |
746 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 747 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
748 | break; |
749 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 750 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
751 | break; |
752 | case USB_PORT_FEAT_SUSPEND: | |
753 | if (temp & PORT_RESET) | |
754 | goto error; | |
f8aeb3bb DB |
755 | if (ehci->no_selective_suspend) |
756 | break; | |
83722bc9 AG |
757 | #ifdef CONFIG_USB_OTG |
758 | if ((hcd->self.otg_port == (wIndex + 1)) | |
759 | && hcd->self.b_hnp_enable) { | |
c2e935a7 | 760 | otg_start_hnp(hcd->phy->otg); |
83722bc9 AG |
761 | break; |
762 | } | |
763 | #endif | |
16032c4f AS |
764 | if (!(temp & PORT_SUSPEND)) |
765 | break; | |
766 | if ((temp & PORT_PE) == 0) | |
767 | goto error; | |
768 | ||
769 | /* clear phy low-power mode before resume */ | |
a46af4eb | 770 | if (ehci->has_hostpc) { |
16032c4f AS |
771 | temp1 = ehci_readl(ehci, hostpc_reg); |
772 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 773 | hostpc_reg); |
16032c4f AS |
774 | spin_unlock_irqrestore(&ehci->lock, flags); |
775 | msleep(5);/* wait to leave low-power mode */ | |
776 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 777 | } |
16032c4f | 778 | /* resume signaling for 20 msec */ |
6d5f89c7 | 779 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
780 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
781 | ehci->reset_done[wIndex] = jiffies | |
782 | + msecs_to_jiffies(20); | |
1da177e4 LT |
783 | break; |
784 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 785 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
786 | break; |
787 | case USB_PORT_FEAT_POWER: | |
788 | if (HCS_PPC (ehci->hcs_params)) | |
6d5f89c7 SW |
789 | ehci_writel(ehci, temp & ~PORT_POWER, |
790 | status_reg); | |
1da177e4 LT |
791 | break; |
792 | case USB_PORT_FEAT_C_CONNECTION: | |
6d5f89c7 | 793 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
794 | break; |
795 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 796 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
797 | break; |
798 | case USB_PORT_FEAT_C_RESET: | |
799 | /* GetPortStatus clears reset */ | |
800 | break; | |
801 | default: | |
802 | goto error; | |
803 | } | |
083522d7 | 804 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
805 | break; |
806 | case GetHubDescriptor: | |
807 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
808 | buf); | |
809 | break; | |
810 | case GetHubStatus: | |
811 | /* no hub-wide feature/status flags */ | |
812 | memset (buf, 0, 4); | |
813 | //cpu_to_le32s ((u32 *) buf); | |
814 | break; | |
815 | case GetPortStatus: | |
816 | if (!wIndex || wIndex > ports) | |
817 | goto error; | |
818 | wIndex--; | |
819 | status = 0; | |
e6316565 | 820 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
821 | |
822 | // wPortChange bits | |
823 | if (temp & PORT_CSC) | |
749da5f8 | 824 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 825 | if (temp & PORT_PEC) |
749da5f8 | 826 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
827 | |
828 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 829 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 830 | |
756aa6b3 CE |
831 | /* |
832 | * Hubs should disable port power on over-current. | |
833 | * However, not all EHCI implementations do this | |
834 | * automatically, even if they _do_ support per-port | |
835 | * power switching; they're allowed to just limit the | |
836 | * current. khubd will turn the power back on. | |
837 | */ | |
81463c1d | 838 | if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) { |
756aa6b3 CE |
839 | ehci_writel(ehci, |
840 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
841 | status_reg); | |
81463c1d | 842 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
843 | } |
844 | } | |
845 | ||
1da177e4 | 846 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
847 | if (temp & PORT_RESUME) { |
848 | ||
849 | /* Remote Wakeup received? */ | |
850 | if (!ehci->reset_done[wIndex]) { | |
851 | /* resume signaling for 20 msec */ | |
852 | ehci->reset_done[wIndex] = jiffies | |
853 | + msecs_to_jiffies(20); | |
854 | /* check the port again */ | |
855 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
856 | ehci->reset_done[wIndex]); | |
857 | } | |
1da177e4 | 858 | |
629e4427 AS |
859 | /* resume completed? */ |
860 | else if (time_after_eq(jiffies, | |
861 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 862 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 863 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 AS |
864 | ehci->reset_done[wIndex] = 0; |
865 | ||
866 | /* stop resume signaling */ | |
867 | temp = ehci_readl(ehci, status_reg); | |
868 | ehci_writel(ehci, | |
e6316565 AS |
869 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
870 | status_reg); | |
a448e4dc | 871 | clear_bit(wIndex, &ehci->resuming_ports); |
629e4427 | 872 | retval = handshake(ehci, status_reg, |
083522d7 | 873 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
874 | if (retval != 0) { |
875 | ehci_err(ehci, | |
876 | "port %d resume error %d\n", | |
877 | wIndex + 1, retval); | |
878 | goto error; | |
879 | } | |
880 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 881 | } |
1da177e4 LT |
882 | } |
883 | ||
884 | /* whoever resets must GetPortStatus to complete it!! */ | |
885 | if ((temp & PORT_RESET) | |
629e4427 AS |
886 | && time_after_eq(jiffies, |
887 | ehci->reset_done[wIndex])) { | |
749da5f8 | 888 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 | 889 | ehci->reset_done [wIndex] = 0; |
a448e4dc | 890 | clear_bit(wIndex, &ehci->resuming_ports); |
1da177e4 LT |
891 | |
892 | /* force reset to complete */ | |
083522d7 | 893 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 894 | status_reg); |
c22fa3ac DB |
895 | /* REVISIT: some hardware needs 550+ usec to clear |
896 | * this bit; seems too long to spin routinely... | |
897 | */ | |
e6316565 | 898 | retval = handshake(ehci, status_reg, |
6307e096 | 899 | PORT_RESET, 0, 1000); |
1da177e4 LT |
900 | if (retval != 0) { |
901 | ehci_err (ehci, "port %d reset error %d\n", | |
902 | wIndex + 1, retval); | |
903 | goto error; | |
904 | } | |
905 | ||
906 | /* see what we found out */ | |
e6316565 AS |
907 | temp = check_reset_complete (ehci, wIndex, status_reg, |
908 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
909 | } |
910 | ||
a448e4dc | 911 | if (!(temp & (PORT_RESUME|PORT_RESET))) { |
eafe5b99 | 912 | ehci->reset_done[wIndex] = 0; |
a448e4dc AS |
913 | clear_bit(wIndex, &ehci->resuming_ports); |
914 | } | |
eafe5b99 | 915 | |
57e06c11 AS |
916 | /* transfer dedicated ports to the companion hc */ |
917 | if ((temp & PORT_CONNECT) && | |
918 | test_bit(wIndex, &ehci->companion_ports)) { | |
919 | temp &= ~PORT_RWC_BITS; | |
920 | temp |= PORT_OWNER; | |
921 | ehci_writel(ehci, temp, status_reg); | |
922 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
923 | temp = ehci_readl(ehci, status_reg); | |
924 | } | |
925 | ||
625b5c9a AS |
926 | /* |
927 | * Even if OWNER is set, there's no harm letting khubd | |
928 | * see the wPortStatus values (they should all be 0 except | |
929 | * for PORT_POWER anyway). | |
930 | */ | |
931 | ||
932 | if (temp & PORT_CONNECT) { | |
749da5f8 | 933 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 934 | // status may be from integrated TT |
331ac6b2 AD |
935 | if (ehci->has_hostpc) { |
936 | temp1 = ehci_readl(ehci, hostpc_reg); | |
937 | status |= ehci_port_speed(ehci, temp1); | |
938 | } else | |
939 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 940 | } |
625b5c9a | 941 | if (temp & PORT_PE) |
749da5f8 | 942 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
943 | |
944 | /* maybe the port was unsuspended without our knowledge */ | |
945 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 946 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
947 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
948 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 949 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
950 | ehci->reset_done[wIndex] = 0; |
951 | if (temp & PORT_PE) | |
952 | set_bit(wIndex, &ehci->port_c_suspend); | |
953 | } | |
954 | ||
625b5c9a | 955 | if (temp & PORT_OC) |
749da5f8 | 956 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 957 | if (temp & PORT_RESET) |
749da5f8 | 958 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 959 | if (temp & PORT_POWER) |
749da5f8 | 960 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 961 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 962 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 963 | |
9776afc8 | 964 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
965 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
966 | #endif | |
967 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 968 | put_unaligned_le32(status, buf); |
1da177e4 LT |
969 | break; |
970 | case SetHubFeature: | |
971 | switch (wValue) { | |
972 | case C_HUB_LOCAL_POWER: | |
973 | case C_HUB_OVER_CURRENT: | |
974 | /* no hub-wide feature/status flags */ | |
975 | break; | |
976 | default: | |
977 | goto error; | |
978 | } | |
979 | break; | |
980 | case SetPortFeature: | |
f0d7f273 DB |
981 | selector = wIndex >> 8; |
982 | wIndex &= 0xff; | |
8d053c79 JW |
983 | if (unlikely(ehci->debug)) { |
984 | /* If the debug port is active any port | |
985 | * feature requests should get denied */ | |
986 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
987 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
988 | retval = -ENODEV; | |
989 | goto error_exit; | |
990 | } | |
991 | } | |
1da177e4 LT |
992 | if (!wIndex || wIndex > ports) |
993 | goto error; | |
994 | wIndex--; | |
e6316565 | 995 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
996 | if (temp & PORT_OWNER) |
997 | break; | |
998 | ||
10f6524a | 999 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1000 | switch (wValue) { |
1001 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1002 | if (ehci->no_selective_suspend) |
1003 | break; | |
1da177e4 LT |
1004 | if ((temp & PORT_PE) == 0 |
1005 | || (temp & PORT_RESET) != 0) | |
1006 | goto error; | |
b9df7942 | 1007 | |
331ac6b2 AD |
1008 | /* After above check the port must be connected. |
1009 | * Set appropriate bit thus could put phy into low power | |
1010 | * mode if we have hostpc feature | |
1011 | */ | |
b9df7942 AD |
1012 | temp &= ~PORT_WKCONN_E; |
1013 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1014 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
a46af4eb | 1015 | if (ehci->has_hostpc) { |
b9df7942 | 1016 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1017 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1018 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1019 | temp1 = ehci_readl(ehci, hostpc_reg); |
1020 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1021 | hostpc_reg); | |
1022 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1023 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1024 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1025 | "succeeded" : "failed"); | |
1026 | } | |
eafe5b99 | 1027 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1028 | break; |
1029 | case USB_PORT_FEAT_POWER: | |
1030 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 1031 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 1032 | status_reg); |
1da177e4 LT |
1033 | break; |
1034 | case USB_PORT_FEAT_RESET: | |
1035 | if (temp & PORT_RESUME) | |
1036 | goto error; | |
1037 | /* line status bits may report this as low speed, | |
1038 | * which can be fine if this root hub has a | |
1039 | * transaction translator built in. | |
1040 | */ | |
1041 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1042 | && !ehci_is_TDI(ehci) | |
1043 | && PORT_USB11 (temp)) { | |
1044 | ehci_dbg (ehci, | |
1045 | "port %d low speed --> companion\n", | |
1046 | wIndex + 1); | |
1047 | temp |= PORT_OWNER; | |
1048 | } else { | |
1049 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
1050 | temp |= PORT_RESET; | |
1051 | temp &= ~PORT_PE; | |
1052 | ||
1053 | /* | |
1054 | * caller must wait, then call GetPortStatus | |
1055 | * usb 2.0 spec says 50 ms resets on root | |
1056 | */ | |
1057 | ehci->reset_done [wIndex] = jiffies | |
1058 | + msecs_to_jiffies (50); | |
1059 | } | |
e6316565 | 1060 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1061 | break; |
f0d7f273 DB |
1062 | |
1063 | /* For downstream facing ports (these): one hub port is put | |
1064 | * into test mode according to USB2 11.24.2.13, then the hub | |
1065 | * must be reset (which for root hub now means rmmod+modprobe, | |
1066 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1067 | * about the EHCI-specific stuff. | |
1068 | */ | |
1069 | case USB_PORT_FEAT_TEST: | |
1070 | if (!selector || selector > 5) | |
1071 | goto error; | |
c4f34764 | 1072 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1073 | ehci_quiesce(ehci); |
c4f34764 | 1074 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
1075 | |
1076 | /* Put all enabled ports into suspend */ | |
1077 | while (ports--) { | |
1078 | u32 __iomem *sreg = | |
1079 | &ehci->regs->port_status[ports]; | |
1080 | ||
1081 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; | |
1082 | if (temp & PORT_PE) | |
1083 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1084 | sreg); | |
1085 | } | |
c4f34764 AS |
1086 | |
1087 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1088 | ehci_halt(ehci); |
c4f34764 AS |
1089 | spin_lock_irqsave(&ehci->lock, flags); |
1090 | ||
77636c86 | 1091 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1092 | temp |= selector << 16; |
e6316565 | 1093 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1094 | break; |
1095 | ||
1da177e4 LT |
1096 | default: |
1097 | goto error; | |
1098 | } | |
083522d7 | 1099 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1100 | break; |
1101 | ||
1102 | default: | |
1103 | error: | |
1104 | /* "stall" on error */ | |
1105 | retval = -EPIPE; | |
1106 | } | |
8d053c79 | 1107 | error_exit: |
1da177e4 LT |
1108 | spin_unlock_irqrestore (&ehci->lock, flags); |
1109 | return retval; | |
1110 | } | |
90da096e | 1111 | |
3e023203 | 1112 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
90da096e BR |
1113 | { |
1114 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1115 | ||
1116 | if (ehci_is_TDI(ehci)) | |
1117 | return; | |
1118 | set_owner(ehci, --portnum, PORT_OWNER); | |
1119 | } | |
1120 | ||
3e023203 | 1121 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
3a31155c AS |
1122 | { |
1123 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1124 | u32 __iomem *reg; | |
1125 | ||
1126 | if (ehci_is_TDI(ehci)) | |
1127 | return 0; | |
1128 | reg = &ehci->regs->port_status[portnum - 1]; | |
1129 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1130 | } |