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 | /*-------------------------------------------------------------------------*/ | |
30 | ||
58a97ffe AS |
31 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
32 | ||
aff6d18f AS |
33 | #ifdef CONFIG_PM |
34 | ||
383975d7 AS |
35 | static int ehci_hub_control( |
36 | struct usb_hcd *hcd, | |
37 | u16 typeReq, | |
38 | u16 wValue, | |
39 | u16 wIndex, | |
40 | char *buf, | |
41 | u16 wLength | |
42 | ); | |
43 | ||
44 | /* After a power loss, ports that were owned by the companion must be | |
45 | * reset so that the companion can still own them. | |
46 | */ | |
47 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
48 | { | |
49 | u32 __iomem *reg; | |
50 | u32 status; | |
51 | int port; | |
52 | __le32 buf; | |
53 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
54 | ||
55 | if (!ehci->owned_ports) | |
56 | return; | |
57 | ||
58 | /* Give the connections some time to appear */ | |
59 | msleep(20); | |
60 | ||
61 | port = HCS_N_PORTS(ehci->hcs_params); | |
62 | while (port--) { | |
63 | if (test_bit(port, &ehci->owned_ports)) { | |
64 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 65 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
66 | |
67 | /* Port already owned by companion? */ | |
68 | if (status & PORT_OWNER) | |
69 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
70 | else if (test_bit(port, &ehci->companion_ports)) |
71 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
383975d7 AS |
72 | else |
73 | ehci_hub_control(hcd, SetPortFeature, | |
74 | USB_PORT_FEAT_RESET, port + 1, | |
75 | NULL, 0); | |
76 | } | |
77 | } | |
78 | ||
79 | if (!ehci->owned_ports) | |
80 | return; | |
81 | msleep(90); /* Wait for resets to complete */ | |
82 | ||
83 | port = HCS_N_PORTS(ehci->hcs_params); | |
84 | while (port--) { | |
85 | if (test_bit(port, &ehci->owned_ports)) { | |
86 | ehci_hub_control(hcd, GetPortStatus, | |
87 | 0, port + 1, | |
88 | (char *) &buf, sizeof(buf)); | |
89 | ||
90 | /* The companion should now own the port, | |
91 | * but if something went wrong the port must not | |
92 | * remain enabled. | |
93 | */ | |
94 | reg = &ehci->regs->port_status[port]; | |
95 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
96 | if (status & PORT_OWNER) | |
97 | ehci_writel(ehci, status | PORT_CSC, reg); | |
98 | else { | |
99 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
100 | port + 1, status); | |
101 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
102 | } | |
103 | } | |
104 | } | |
105 | ||
106 | ehci->owned_ports = 0; | |
107 | } | |
108 | ||
0c0382e3 | 109 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
110 | { |
111 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
112 | int port; | |
8c03356a | 113 | int mask; |
331ac6b2 | 114 | u32 __iomem *hostpc_reg = NULL; |
1da177e4 | 115 | |
8c774fe8 AS |
116 | ehci_dbg(ehci, "suspend root hub\n"); |
117 | ||
1da177e4 LT |
118 | if (time_before (jiffies, ehci->next_statechange)) |
119 | msleep(5); | |
f8fa7571 AS |
120 | del_timer_sync(&ehci->watchdog); |
121 | del_timer_sync(&ehci->iaa_watchdog); | |
1da177e4 | 122 | |
1da177e4 LT |
123 | spin_lock_irq (&ehci->lock); |
124 | ||
cec3a53c AS |
125 | /* Once the controller is stopped, port resumes that are already |
126 | * in progress won't complete. Hence if remote wakeup is enabled | |
127 | * for the root hub and any ports are in the middle of a resume or | |
128 | * remote wakeup, we must fail the suspend. | |
129 | */ | |
130 | if (hcd->self.root_hub->do_remote_wakeup) { | |
131 | port = HCS_N_PORTS(ehci->hcs_params); | |
132 | while (port--) { | |
133 | if (ehci->reset_done[port] != 0) { | |
134 | spin_unlock_irq(&ehci->lock); | |
135 | ehci_dbg(ehci, "suspend failed because " | |
136 | "port %d is resuming\n", | |
137 | port + 1); | |
138 | return -EBUSY; | |
139 | } | |
140 | } | |
141 | } | |
142 | ||
1da177e4 LT |
143 | /* stop schedules, clean any completed work */ |
144 | if (HC_IS_RUNNING(hcd->state)) { | |
145 | ehci_quiesce (ehci); | |
146 | hcd->state = HC_STATE_QUIESCING; | |
147 | } | |
083522d7 | 148 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
7d12e780 | 149 | ehci_work(ehci); |
1da177e4 | 150 | |
8c03356a AS |
151 | /* Unlike other USB host controller types, EHCI doesn't have |
152 | * any notion of "global" or bus-wide suspend. The driver has | |
153 | * to manually suspend all the active unsuspended ports, and | |
154 | * then manually resume them in the bus_resume() routine. | |
155 | */ | |
156 | ehci->bus_suspended = 0; | |
383975d7 | 157 | ehci->owned_ports = 0; |
cec3a53c | 158 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
159 | while (port--) { |
160 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 161 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
1da177e4 LT |
162 | u32 t2 = t1; |
163 | ||
331ac6b2 AD |
164 | if (ehci->has_hostpc) |
165 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs | |
166 | + HOSTPC0 + 4 * (port & 0xff)); | |
8c03356a | 167 | /* keep track of which ports we suspend */ |
383975d7 AS |
168 | if (t1 & PORT_OWNER) |
169 | set_bit(port, &ehci->owned_ports); | |
170 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 171 | t2 |= PORT_SUSPEND; |
8c03356a AS |
172 | set_bit(port, &ehci->bus_suspended); |
173 | } | |
174 | ||
175 | /* enable remote wakeup on all ports */ | |
331ac6b2 AD |
176 | if (hcd->self.root_hub->do_remote_wakeup) { |
177 | /* only enable appropriate wake bits, otherwise the | |
178 | * hardware can not go phy low power mode. If a race | |
179 | * condition happens here(connection change during bits | |
180 | * set), the port change detection will finally fix it. | |
181 | */ | |
182 | if (t1 & PORT_CONNECT) { | |
183 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
184 | t2 &= ~PORT_WKCONN_E; | |
185 | } else { | |
186 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
187 | t2 &= ~PORT_WKDISC_E; | |
188 | } | |
189 | } else | |
58a97ffe | 190 | t2 &= ~PORT_WAKE_BITS; |
1da177e4 LT |
191 | |
192 | if (t1 != t2) { | |
193 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
194 | port + 1, t1, t2); | |
083522d7 | 195 | ehci_writel(ehci, t2, reg); |
331ac6b2 AD |
196 | if (hostpc_reg) { |
197 | u32 t3; | |
198 | ||
b9df7942 | 199 | spin_unlock_irq(&ehci->lock); |
331ac6b2 | 200 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 201 | spin_lock_irq(&ehci->lock); |
331ac6b2 AD |
202 | t3 = ehci_readl(ehci, hostpc_reg); |
203 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
204 | t3 = ehci_readl(ehci, hostpc_reg); | |
205 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
206 | port, (t3 & HOSTPC_PHCD) ? | |
207 | "succeeded" : "failed"); | |
208 | } | |
1da177e4 LT |
209 | } |
210 | } | |
211 | ||
cd930c93 AS |
212 | /* Apparently some devices need a >= 1-uframe delay here */ |
213 | if (ehci->bus_suspended) | |
214 | udelay(150); | |
215 | ||
1da177e4 LT |
216 | /* turn off now-idle HC */ |
217 | ehci_halt (ehci); | |
218 | hcd->state = HC_STATE_SUSPENDED; | |
219 | ||
cdc647a9 DB |
220 | if (ehci->reclaim) |
221 | end_unlink_async(ehci); | |
222 | ||
8c03356a AS |
223 | /* allow remote wakeup */ |
224 | mask = INTR_MASK; | |
58a97ffe | 225 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 226 | mask &= ~STS_PCD; |
083522d7 BH |
227 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
228 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 229 | |
1da177e4 LT |
230 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
231 | spin_unlock_irq (&ehci->lock); | |
015798b2 JH |
232 | |
233 | /* ehci_work() may have re-enabled the watchdog timer, which we do not | |
234 | * want, and so we must delete any pending watchdog timer events. | |
235 | */ | |
236 | del_timer_sync(&ehci->watchdog); | |
1da177e4 LT |
237 | return 0; |
238 | } | |
239 | ||
240 | ||
241 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 242 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
243 | { |
244 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
245 | u32 temp; | |
383975d7 | 246 | u32 power_okay; |
1da177e4 | 247 | int i; |
3a4e72cb | 248 | u8 resume_needed = 0; |
1da177e4 LT |
249 | |
250 | if (time_before (jiffies, ehci->next_statechange)) | |
251 | msleep(5); | |
252 | spin_lock_irq (&ehci->lock); | |
cfa59dab AS |
253 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
254 | spin_unlock_irq(&ehci->lock); | |
255 | return -ESHUTDOWN; | |
256 | } | |
1da177e4 | 257 | |
ad45f1dc | 258 | if (unlikely(ehci->debug)) { |
872d3599 | 259 | if (!dbgp_reset_prep()) |
ad45f1dc JW |
260 | ehci->debug = NULL; |
261 | else | |
262 | dbgp_external_startup(); | |
263 | } | |
264 | ||
f03c17fc DB |
265 | /* Ideally and we've got a real resume here, and no port's power |
266 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
267 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
268 | * the last user of the controller, not reset/pm hardware keeping | |
269 | * state we gave to it. | |
270 | */ | |
383975d7 AS |
271 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
272 | ehci_dbg(ehci, "resume root hub%s\n", | |
273 | power_okay ? "" : " after power loss"); | |
f03c17fc | 274 | |
8c03356a AS |
275 | /* at least some APM implementations will try to deliver |
276 | * IRQs right away, so delay them until we're ready. | |
277 | */ | |
083522d7 | 278 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
279 | |
280 | /* re-init operational registers */ | |
083522d7 BH |
281 | ehci_writel(ehci, 0, &ehci->regs->segment); |
282 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
283 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
284 | |
285 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
083522d7 | 286 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 | 287 | |
e198a314 AS |
288 | /* Some controller/firmware combinations need a delay during which |
289 | * they set up the port statuses. See Bugzilla #8190. */ | |
3a4e72cb VP |
290 | spin_unlock_irq(&ehci->lock); |
291 | msleep(8); | |
292 | spin_lock_irq(&ehci->lock); | |
e198a314 | 293 | |
8c03356a | 294 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
295 | i = HCS_N_PORTS (ehci->hcs_params); |
296 | while (i--) { | |
083522d7 | 297 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 298 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 299 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 300 | (temp & PORT_SUSPEND)) { |
1da177e4 | 301 | temp |= PORT_RESUME; |
3a4e72cb VP |
302 | resume_needed = 1; |
303 | } | |
083522d7 | 304 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 305 | } |
3a4e72cb VP |
306 | |
307 | /* msleep for 20ms only if code is trying to resume port */ | |
308 | if (resume_needed) { | |
309 | spin_unlock_irq(&ehci->lock); | |
310 | msleep(20); | |
311 | spin_lock_irq(&ehci->lock); | |
312 | } | |
313 | ||
1da177e4 | 314 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 315 | while (i--) { |
083522d7 | 316 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
317 | if (test_bit(i, &ehci->bus_suspended) && |
318 | (temp & PORT_SUSPEND)) { | |
319 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 320 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
321 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
322 | } | |
1da177e4 | 323 | } |
083522d7 | 324 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
325 | |
326 | /* maybe re-activate the schedule(s) */ | |
327 | temp = 0; | |
328 | if (ehci->async->qh_next.qh) | |
329 | temp |= CMD_ASE; | |
330 | if (ehci->periodic_sched) | |
331 | temp |= CMD_PSE; | |
332 | if (temp) { | |
333 | ehci->command |= temp; | |
083522d7 | 334 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
335 | } |
336 | ||
337 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
338 | hcd->state = HC_STATE_RUNNING; | |
339 | ||
340 | /* Now we can safely re-enable irqs */ | |
083522d7 | 341 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
342 | |
343 | spin_unlock_irq (&ehci->lock); | |
3bb1af52 | 344 | ehci_handover_companion_ports(ehci); |
1da177e4 LT |
345 | return 0; |
346 | } | |
347 | ||
348 | #else | |
349 | ||
0c0382e3 AS |
350 | #define ehci_bus_suspend NULL |
351 | #define ehci_bus_resume NULL | |
1da177e4 LT |
352 | |
353 | #endif /* CONFIG_PM */ | |
354 | ||
57e06c11 AS |
355 | /*-------------------------------------------------------------------------*/ |
356 | ||
357 | /* Display the ports dedicated to the companion controller */ | |
5a3201b2 TJ |
358 | static ssize_t show_companion(struct device *dev, |
359 | struct device_attribute *attr, | |
360 | char *buf) | |
57e06c11 AS |
361 | { |
362 | struct ehci_hcd *ehci; | |
363 | int nports, index, n; | |
364 | int count = PAGE_SIZE; | |
365 | char *ptr = buf; | |
366 | ||
5a3201b2 | 367 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); |
57e06c11 AS |
368 | nports = HCS_N_PORTS(ehci->hcs_params); |
369 | ||
370 | for (index = 0; index < nports; ++index) { | |
371 | if (test_bit(index, &ehci->companion_ports)) { | |
372 | n = scnprintf(ptr, count, "%d\n", index + 1); | |
373 | ptr += n; | |
374 | count -= n; | |
375 | } | |
376 | } | |
377 | return ptr - buf; | |
378 | } | |
379 | ||
380 | /* | |
90da096e | 381 | * Sets the owner of a port |
57e06c11 | 382 | */ |
90da096e | 383 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 384 | { |
57e06c11 AS |
385 | u32 __iomem *status_reg; |
386 | u32 port_status; | |
90da096e | 387 | int try; |
57e06c11 | 388 | |
90da096e | 389 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
390 | |
391 | /* | |
392 | * The controller won't set the OWNER bit if the port is | |
393 | * enabled, so this loop will sometimes require at least two | |
394 | * iterations: one to disable the port and one to set OWNER. | |
395 | */ | |
57e06c11 AS |
396 | for (try = 4; try > 0; --try) { |
397 | spin_lock_irq(&ehci->lock); | |
398 | port_status = ehci_readl(ehci, status_reg); | |
399 | if ((port_status & PORT_OWNER) == new_owner | |
400 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
401 | == 0) | |
402 | try = 0; | |
403 | else { | |
404 | port_status ^= PORT_OWNER; | |
405 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
406 | ehci_writel(ehci, port_status, status_reg); | |
407 | } | |
408 | spin_unlock_irq(&ehci->lock); | |
409 | if (try > 1) | |
410 | msleep(5); | |
411 | } | |
90da096e BR |
412 | } |
413 | ||
414 | /* | |
415 | * Dedicate or undedicate a port to the companion controller. | |
416 | * Syntax is "[-]portnum", where a leading '-' sign means | |
417 | * return control of the port to the EHCI controller. | |
418 | */ | |
419 | static ssize_t store_companion(struct device *dev, | |
420 | struct device_attribute *attr, | |
421 | const char *buf, size_t count) | |
422 | { | |
423 | struct ehci_hcd *ehci; | |
424 | int portnum, new_owner; | |
425 | ||
426 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); | |
427 | new_owner = PORT_OWNER; /* Owned by companion */ | |
428 | if (sscanf(buf, "%d", &portnum) != 1) | |
429 | return -EINVAL; | |
430 | if (portnum < 0) { | |
431 | portnum = - portnum; | |
432 | new_owner = 0; /* Owned by EHCI */ | |
433 | } | |
434 | if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | |
435 | return -ENOENT; | |
436 | portnum--; | |
437 | if (new_owner) | |
438 | set_bit(portnum, &ehci->companion_ports); | |
439 | else | |
440 | clear_bit(portnum, &ehci->companion_ports); | |
441 | set_owner(ehci, portnum, new_owner); | |
57e06c11 AS |
442 | return count; |
443 | } | |
5a3201b2 | 444 | static DEVICE_ATTR(companion, 0644, show_companion, store_companion); |
57e06c11 AS |
445 | |
446 | static inline void create_companion_file(struct ehci_hcd *ehci) | |
447 | { | |
448 | int i; | |
449 | ||
450 | /* with integrated TT there is no companion! */ | |
451 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 452 | i = device_create_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 453 | &dev_attr_companion); |
57e06c11 AS |
454 | } |
455 | ||
456 | static inline void remove_companion_file(struct ehci_hcd *ehci) | |
457 | { | |
458 | /* with integrated TT there is no companion! */ | |
459 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 460 | device_remove_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 461 | &dev_attr_companion); |
57e06c11 AS |
462 | } |
463 | ||
464 | ||
1da177e4 LT |
465 | /*-------------------------------------------------------------------------*/ |
466 | ||
467 | static int check_reset_complete ( | |
468 | struct ehci_hcd *ehci, | |
469 | int index, | |
e6316565 | 470 | u32 __iomem *status_reg, |
1da177e4 LT |
471 | int port_status |
472 | ) { | |
cd4cdc93 | 473 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 474 | return port_status; |
1da177e4 LT |
475 | |
476 | /* if reset finished and it's still not enabled -- handoff */ | |
477 | if (!(port_status & PORT_PE)) { | |
478 | ||
479 | /* with integrated TT, there's nobody to hand it to! */ | |
480 | if (ehci_is_TDI(ehci)) { | |
481 | ehci_dbg (ehci, | |
482 | "Failed to enable port %d on root hub TT\n", | |
483 | index+1); | |
484 | return port_status; | |
485 | } | |
486 | ||
487 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
488 | index + 1); | |
489 | ||
490 | // what happens if HCS_N_CC(params) == 0 ? | |
491 | port_status |= PORT_OWNER; | |
10f6524a | 492 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 493 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 494 | |
796bcae7 VB |
495 | /* ensure 440EPX ohci controller state is operational */ |
496 | if (ehci->has_amcc_usb23) | |
497 | set_ohci_hcfs(ehci, 1); | |
498 | } else { | |
1da177e4 | 499 | ehci_dbg (ehci, "port %d high speed\n", index + 1); |
796bcae7 VB |
500 | /* ensure 440EPx ohci controller state is suspended */ |
501 | if (ehci->has_amcc_usb23) | |
502 | set_ohci_hcfs(ehci, 0); | |
503 | } | |
1da177e4 LT |
504 | |
505 | return port_status; | |
506 | } | |
507 | ||
508 | /*-------------------------------------------------------------------------*/ | |
509 | ||
510 | ||
511 | /* build "status change" packet (one or two bytes) from HC registers */ | |
512 | ||
513 | static int | |
514 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
515 | { | |
516 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
517 | u32 temp, status = 0; | |
93f1a47c | 518 | u32 mask; |
1da177e4 LT |
519 | int ports, i, retval = 1; |
520 | unsigned long flags; | |
521 | ||
522 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
523 | if (!HC_IS_RUNNING(hcd->state)) | |
524 | return 0; | |
525 | ||
526 | /* init status to no-changes */ | |
527 | buf [0] = 0; | |
528 | ports = HCS_N_PORTS (ehci->hcs_params); | |
529 | if (ports > 7) { | |
530 | buf [1] = 0; | |
531 | retval++; | |
532 | } | |
53bd6a60 | 533 | |
93f1a47c DB |
534 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
535 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 536 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
537 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
538 | * PORT_POWER; that's surprising, but maybe within-spec. | |
539 | */ | |
540 | if (!ignore_oc) | |
541 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
542 | else | |
543 | mask = PORT_CSC | PORT_PEC; | |
544 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
545 | ||
1da177e4 LT |
546 | /* no hub change reports (bit 0) for now (power, ...) */ |
547 | ||
548 | /* port N changes (bit N)? */ | |
549 | spin_lock_irqsave (&ehci->lock, flags); | |
550 | for (i = 0; i < ports; i++) { | |
083522d7 | 551 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
552 | |
553 | /* | |
554 | * Return status information even for ports with OWNER set. | |
555 | * Otherwise khubd wouldn't see the disconnect event when a | |
556 | * high-speed device is switched over to the companion | |
557 | * controller by the user. | |
558 | */ | |
559 | ||
eafe5b99 AS |
560 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
561 | || (ehci->reset_done[i] && time_after_eq( | |
562 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
563 | if (i < 7) |
564 | buf [0] |= 1 << (i + 1); | |
565 | else | |
566 | buf [1] |= 1 << (i - 7); | |
567 | status = STS_PCD; | |
568 | } | |
569 | } | |
570 | /* FIXME autosuspend idle root hubs */ | |
571 | spin_unlock_irqrestore (&ehci->lock, flags); | |
572 | return status ? retval : 0; | |
573 | } | |
574 | ||
575 | /*-------------------------------------------------------------------------*/ | |
576 | ||
577 | static void | |
578 | ehci_hub_descriptor ( | |
579 | struct ehci_hcd *ehci, | |
580 | struct usb_hub_descriptor *desc | |
581 | ) { | |
582 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
583 | u16 temp; | |
584 | ||
585 | desc->bDescriptorType = 0x29; | |
586 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
587 | desc->bHubContrCurrent = 0; | |
588 | ||
589 | desc->bNbrPorts = ports; | |
590 | temp = 1 + (ports / 8); | |
591 | desc->bDescLength = 7 + 2 * temp; | |
592 | ||
593 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
594 | memset (&desc->bitmap [0], 0, temp); | |
595 | memset (&desc->bitmap [temp], 0xff, temp); | |
596 | ||
597 | temp = 0x0008; /* per-port overcurrent reporting */ | |
598 | if (HCS_PPC (ehci->hcs_params)) | |
599 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
600 | else |
601 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
602 | #if 0 |
603 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
604 | if (HCS_INDICATOR (ehci->hcs_params)) | |
605 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
606 | #endif | |
fd05e720 | 607 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
608 | } |
609 | ||
610 | /*-------------------------------------------------------------------------*/ | |
611 | ||
1da177e4 LT |
612 | static int ehci_hub_control ( |
613 | struct usb_hcd *hcd, | |
614 | u16 typeReq, | |
615 | u16 wValue, | |
616 | u16 wIndex, | |
617 | char *buf, | |
618 | u16 wLength | |
619 | ) { | |
620 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
621 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
622 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
623 | (wIndex & 0xff) - 1]; | |
331ac6b2 AD |
624 | u32 __iomem *hostpc_reg = NULL; |
625 | u32 temp, temp1, status; | |
1da177e4 LT |
626 | unsigned long flags; |
627 | int retval = 0; | |
f0d7f273 | 628 | unsigned selector; |
1da177e4 LT |
629 | |
630 | /* | |
631 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
632 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
633 | * (track current state ourselves) ... blink for diagnostics, | |
634 | * power, "this is the one", etc. EHCI spec supports this. | |
635 | */ | |
636 | ||
331ac6b2 AD |
637 | if (ehci->has_hostpc) |
638 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs | |
639 | + HOSTPC0 + 4 * ((wIndex & 0xff) - 1)); | |
1da177e4 LT |
640 | spin_lock_irqsave (&ehci->lock, flags); |
641 | switch (typeReq) { | |
642 | case ClearHubFeature: | |
643 | switch (wValue) { | |
644 | case C_HUB_LOCAL_POWER: | |
645 | case C_HUB_OVER_CURRENT: | |
646 | /* no hub-wide feature/status flags */ | |
647 | break; | |
648 | default: | |
649 | goto error; | |
650 | } | |
651 | break; | |
652 | case ClearPortFeature: | |
653 | if (!wIndex || wIndex > ports) | |
654 | goto error; | |
655 | wIndex--; | |
e6316565 | 656 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
657 | |
658 | /* | |
659 | * Even if OWNER is set, so the port is owned by the | |
660 | * companion controller, khubd needs to be able to clear | |
661 | * the port-change status bits (especially | |
662 | * USB_PORT_FEAT_C_CONNECTION). | |
663 | */ | |
1da177e4 LT |
664 | |
665 | switch (wValue) { | |
666 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 667 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
668 | break; |
669 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 670 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 671 | status_reg); |
1da177e4 LT |
672 | break; |
673 | case USB_PORT_FEAT_SUSPEND: | |
674 | if (temp & PORT_RESET) | |
675 | goto error; | |
f8aeb3bb DB |
676 | if (ehci->no_selective_suspend) |
677 | break; | |
1da177e4 LT |
678 | if (temp & PORT_SUSPEND) { |
679 | if ((temp & PORT_PE) == 0) | |
680 | goto error; | |
681 | /* resume signaling for 20 msec */ | |
10f6524a | 682 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
083522d7 | 683 | ehci_writel(ehci, temp | PORT_RESUME, |
e6316565 | 684 | status_reg); |
1da177e4 LT |
685 | ehci->reset_done [wIndex] = jiffies |
686 | + msecs_to_jiffies (20); | |
687 | } | |
688 | break; | |
689 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 690 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
691 | break; |
692 | case USB_PORT_FEAT_POWER: | |
693 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
694 | ehci_writel(ehci, |
695 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 696 | status_reg); |
1da177e4 LT |
697 | break; |
698 | case USB_PORT_FEAT_C_CONNECTION: | |
083522d7 | 699 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 700 | status_reg); |
1da177e4 LT |
701 | break; |
702 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 703 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 704 | status_reg); |
1da177e4 LT |
705 | break; |
706 | case USB_PORT_FEAT_C_RESET: | |
707 | /* GetPortStatus clears reset */ | |
708 | break; | |
709 | default: | |
710 | goto error; | |
711 | } | |
083522d7 | 712 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
713 | break; |
714 | case GetHubDescriptor: | |
715 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
716 | buf); | |
717 | break; | |
718 | case GetHubStatus: | |
719 | /* no hub-wide feature/status flags */ | |
720 | memset (buf, 0, 4); | |
721 | //cpu_to_le32s ((u32 *) buf); | |
722 | break; | |
723 | case GetPortStatus: | |
724 | if (!wIndex || wIndex > ports) | |
725 | goto error; | |
726 | wIndex--; | |
727 | status = 0; | |
e6316565 | 728 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
729 | |
730 | // wPortChange bits | |
731 | if (temp & PORT_CSC) | |
732 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
733 | if (temp & PORT_PEC) | |
734 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
756aa6b3 CE |
735 | |
736 | if ((temp & PORT_OCC) && !ignore_oc){ | |
1da177e4 LT |
737 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; |
738 | ||
756aa6b3 CE |
739 | /* |
740 | * Hubs should disable port power on over-current. | |
741 | * However, not all EHCI implementations do this | |
742 | * automatically, even if they _do_ support per-port | |
743 | * power switching; they're allowed to just limit the | |
744 | * current. khubd will turn the power back on. | |
745 | */ | |
746 | if (HCS_PPC (ehci->hcs_params)){ | |
747 | ehci_writel(ehci, | |
748 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
749 | status_reg); | |
750 | } | |
751 | } | |
752 | ||
1da177e4 | 753 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
754 | if (temp & PORT_RESUME) { |
755 | ||
756 | /* Remote Wakeup received? */ | |
757 | if (!ehci->reset_done[wIndex]) { | |
758 | /* resume signaling for 20 msec */ | |
759 | ehci->reset_done[wIndex] = jiffies | |
760 | + msecs_to_jiffies(20); | |
761 | /* check the port again */ | |
762 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
763 | ehci->reset_done[wIndex]); | |
764 | } | |
1da177e4 | 765 | |
629e4427 AS |
766 | /* resume completed? */ |
767 | else if (time_after_eq(jiffies, | |
768 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 769 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 770 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 AS |
771 | ehci->reset_done[wIndex] = 0; |
772 | ||
773 | /* stop resume signaling */ | |
774 | temp = ehci_readl(ehci, status_reg); | |
775 | ehci_writel(ehci, | |
e6316565 AS |
776 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
777 | status_reg); | |
629e4427 | 778 | retval = handshake(ehci, status_reg, |
083522d7 | 779 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
780 | if (retval != 0) { |
781 | ehci_err(ehci, | |
782 | "port %d resume error %d\n", | |
783 | wIndex + 1, retval); | |
784 | goto error; | |
785 | } | |
786 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 787 | } |
1da177e4 LT |
788 | } |
789 | ||
790 | /* whoever resets must GetPortStatus to complete it!! */ | |
791 | if ((temp & PORT_RESET) | |
629e4427 AS |
792 | && time_after_eq(jiffies, |
793 | ehci->reset_done[wIndex])) { | |
1da177e4 LT |
794 | status |= 1 << USB_PORT_FEAT_C_RESET; |
795 | ehci->reset_done [wIndex] = 0; | |
796 | ||
797 | /* force reset to complete */ | |
083522d7 | 798 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 799 | status_reg); |
c22fa3ac DB |
800 | /* REVISIT: some hardware needs 550+ usec to clear |
801 | * this bit; seems too long to spin routinely... | |
802 | */ | |
e6316565 | 803 | retval = handshake(ehci, status_reg, |
c22fa3ac | 804 | PORT_RESET, 0, 750); |
1da177e4 LT |
805 | if (retval != 0) { |
806 | ehci_err (ehci, "port %d reset error %d\n", | |
807 | wIndex + 1, retval); | |
808 | goto error; | |
809 | } | |
810 | ||
811 | /* see what we found out */ | |
e6316565 AS |
812 | temp = check_reset_complete (ehci, wIndex, status_reg, |
813 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
814 | } |
815 | ||
eafe5b99 AS |
816 | if (!(temp & (PORT_RESUME|PORT_RESET))) |
817 | ehci->reset_done[wIndex] = 0; | |
818 | ||
57e06c11 AS |
819 | /* transfer dedicated ports to the companion hc */ |
820 | if ((temp & PORT_CONNECT) && | |
821 | test_bit(wIndex, &ehci->companion_ports)) { | |
822 | temp &= ~PORT_RWC_BITS; | |
823 | temp |= PORT_OWNER; | |
824 | ehci_writel(ehci, temp, status_reg); | |
825 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
826 | temp = ehci_readl(ehci, status_reg); | |
827 | } | |
828 | ||
625b5c9a AS |
829 | /* |
830 | * Even if OWNER is set, there's no harm letting khubd | |
831 | * see the wPortStatus values (they should all be 0 except | |
832 | * for PORT_POWER anyway). | |
833 | */ | |
834 | ||
835 | if (temp & PORT_CONNECT) { | |
836 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
837 | // status may be from integrated TT | |
331ac6b2 AD |
838 | if (ehci->has_hostpc) { |
839 | temp1 = ehci_readl(ehci, hostpc_reg); | |
840 | status |= ehci_port_speed(ehci, temp1); | |
841 | } else | |
842 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 843 | } |
625b5c9a AS |
844 | if (temp & PORT_PE) |
845 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
eafe5b99 AS |
846 | |
847 | /* maybe the port was unsuspended without our knowledge */ | |
848 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
625b5c9a | 849 | status |= 1 << USB_PORT_FEAT_SUSPEND; |
eafe5b99 AS |
850 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
851 | clear_bit(wIndex, &ehci->suspended_ports); | |
852 | ehci->reset_done[wIndex] = 0; | |
853 | if (temp & PORT_PE) | |
854 | set_bit(wIndex, &ehci->port_c_suspend); | |
855 | } | |
856 | ||
625b5c9a AS |
857 | if (temp & PORT_OC) |
858 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
859 | if (temp & PORT_RESET) | |
860 | status |= 1 << USB_PORT_FEAT_RESET; | |
861 | if (temp & PORT_POWER) | |
862 | status |= 1 << USB_PORT_FEAT_POWER; | |
d1f114d1 AS |
863 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
864 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
1da177e4 | 865 | |
9776afc8 | 866 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
867 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
868 | #endif | |
869 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 870 | put_unaligned_le32(status, buf); |
1da177e4 LT |
871 | break; |
872 | case SetHubFeature: | |
873 | switch (wValue) { | |
874 | case C_HUB_LOCAL_POWER: | |
875 | case C_HUB_OVER_CURRENT: | |
876 | /* no hub-wide feature/status flags */ | |
877 | break; | |
878 | default: | |
879 | goto error; | |
880 | } | |
881 | break; | |
882 | case SetPortFeature: | |
f0d7f273 DB |
883 | selector = wIndex >> 8; |
884 | wIndex &= 0xff; | |
8d053c79 JW |
885 | if (unlikely(ehci->debug)) { |
886 | /* If the debug port is active any port | |
887 | * feature requests should get denied */ | |
888 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
889 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
890 | retval = -ENODEV; | |
891 | goto error_exit; | |
892 | } | |
893 | } | |
1da177e4 LT |
894 | if (!wIndex || wIndex > ports) |
895 | goto error; | |
896 | wIndex--; | |
e6316565 | 897 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
898 | if (temp & PORT_OWNER) |
899 | break; | |
900 | ||
10f6524a | 901 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
902 | switch (wValue) { |
903 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
904 | if (ehci->no_selective_suspend) |
905 | break; | |
1da177e4 LT |
906 | if ((temp & PORT_PE) == 0 |
907 | || (temp & PORT_RESET) != 0) | |
908 | goto error; | |
b9df7942 | 909 | |
331ac6b2 AD |
910 | /* After above check the port must be connected. |
911 | * Set appropriate bit thus could put phy into low power | |
912 | * mode if we have hostpc feature | |
913 | */ | |
b9df7942 AD |
914 | temp &= ~PORT_WKCONN_E; |
915 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
916 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
331ac6b2 | 917 | if (hostpc_reg) { |
b9df7942 | 918 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 919 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 920 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
921 | temp1 = ehci_readl(ehci, hostpc_reg); |
922 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
923 | hostpc_reg); | |
924 | temp1 = ehci_readl(ehci, hostpc_reg); | |
925 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
926 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
927 | "succeeded" : "failed"); | |
928 | } | |
eafe5b99 | 929 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
930 | break; |
931 | case USB_PORT_FEAT_POWER: | |
932 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 933 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 934 | status_reg); |
1da177e4 LT |
935 | break; |
936 | case USB_PORT_FEAT_RESET: | |
937 | if (temp & PORT_RESUME) | |
938 | goto error; | |
939 | /* line status bits may report this as low speed, | |
940 | * which can be fine if this root hub has a | |
941 | * transaction translator built in. | |
942 | */ | |
943 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
944 | && !ehci_is_TDI(ehci) | |
945 | && PORT_USB11 (temp)) { | |
946 | ehci_dbg (ehci, | |
947 | "port %d low speed --> companion\n", | |
948 | wIndex + 1); | |
949 | temp |= PORT_OWNER; | |
950 | } else { | |
951 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
952 | temp |= PORT_RESET; | |
953 | temp &= ~PORT_PE; | |
954 | ||
955 | /* | |
956 | * caller must wait, then call GetPortStatus | |
957 | * usb 2.0 spec says 50 ms resets on root | |
958 | */ | |
959 | ehci->reset_done [wIndex] = jiffies | |
960 | + msecs_to_jiffies (50); | |
961 | } | |
e6316565 | 962 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 963 | break; |
f0d7f273 DB |
964 | |
965 | /* For downstream facing ports (these): one hub port is put | |
966 | * into test mode according to USB2 11.24.2.13, then the hub | |
967 | * must be reset (which for root hub now means rmmod+modprobe, | |
968 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
969 | * about the EHCI-specific stuff. | |
970 | */ | |
971 | case USB_PORT_FEAT_TEST: | |
972 | if (!selector || selector > 5) | |
973 | goto error; | |
974 | ehci_quiesce(ehci); | |
975 | ehci_halt(ehci); | |
976 | temp |= selector << 16; | |
e6316565 | 977 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
978 | break; |
979 | ||
1da177e4 LT |
980 | default: |
981 | goto error; | |
982 | } | |
083522d7 | 983 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
984 | break; |
985 | ||
986 | default: | |
987 | error: | |
988 | /* "stall" on error */ | |
989 | retval = -EPIPE; | |
990 | } | |
8d053c79 | 991 | error_exit: |
1da177e4 LT |
992 | spin_unlock_irqrestore (&ehci->lock, flags); |
993 | return retval; | |
994 | } | |
90da096e BR |
995 | |
996 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) | |
997 | { | |
998 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
999 | ||
1000 | if (ehci_is_TDI(ehci)) | |
1001 | return; | |
1002 | set_owner(ehci, --portnum, PORT_OWNER); | |
1003 | } | |
1004 | ||
3a31155c AS |
1005 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
1006 | { | |
1007 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1008 | u32 __iomem *reg; | |
1009 | ||
1010 | if (ehci_is_TDI(ehci)) | |
1011 | return 0; | |
1012 | reg = &ehci->regs->port_status[portnum - 1]; | |
1013 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1014 | } |