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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 | /*-------------------------------------------------------------------------*/ | |
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 | ||
16032c4f AS |
109 | static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
110 | bool suspending) | |
111 | { | |
112 | int port; | |
113 | u32 temp; | |
114 | ||
115 | /* If remote wakeup is enabled for the root hub but disabled | |
116 | * for the controller, we must adjust all the port wakeup flags | |
117 | * when the controller is suspended or resumed. In all other | |
118 | * cases they don't need to be changed. | |
119 | */ | |
120 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || | |
121 | device_may_wakeup(ehci_to_hcd(ehci)->self.controller)) | |
122 | return; | |
123 | ||
124 | /* clear phy low-power mode before changing wakeup flags */ | |
125 | if (ehci->has_hostpc) { | |
126 | port = HCS_N_PORTS(ehci->hcs_params); | |
127 | while (port--) { | |
128 | u32 __iomem *hostpc_reg; | |
129 | ||
130 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs | |
131 | + HOSTPC0 + 4 * port); | |
132 | temp = ehci_readl(ehci, hostpc_reg); | |
133 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
134 | } | |
135 | msleep(5); | |
136 | } | |
137 | ||
138 | port = HCS_N_PORTS(ehci->hcs_params); | |
139 | while (port--) { | |
140 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
141 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
142 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
143 | ||
144 | /* If we are suspending the controller, clear the flags. | |
145 | * If we are resuming the controller, set the wakeup flags. | |
146 | */ | |
147 | if (!suspending) { | |
148 | if (t1 & PORT_CONNECT) | |
149 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
150 | else | |
151 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
152 | } | |
153 | ehci_vdbg(ehci, "port %d, %08x -> %08x\n", | |
154 | port + 1, t1, t2); | |
155 | ehci_writel(ehci, t2, reg); | |
156 | } | |
157 | ||
158 | /* enter phy low-power mode again */ | |
159 | if (ehci->has_hostpc) { | |
160 | port = HCS_N_PORTS(ehci->hcs_params); | |
161 | while (port--) { | |
162 | u32 __iomem *hostpc_reg; | |
163 | ||
164 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs | |
165 | + HOSTPC0 + 4 * port); | |
166 | temp = ehci_readl(ehci, hostpc_reg); | |
167 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
168 | } | |
169 | } | |
170 | } | |
171 | ||
0c0382e3 | 172 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
173 | { |
174 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
175 | int port; | |
8c03356a | 176 | int mask; |
16032c4f | 177 | int changed; |
1da177e4 | 178 | |
8c774fe8 AS |
179 | ehci_dbg(ehci, "suspend root hub\n"); |
180 | ||
1da177e4 LT |
181 | if (time_before (jiffies, ehci->next_statechange)) |
182 | msleep(5); | |
f8fa7571 AS |
183 | del_timer_sync(&ehci->watchdog); |
184 | del_timer_sync(&ehci->iaa_watchdog); | |
1da177e4 | 185 | |
1da177e4 LT |
186 | spin_lock_irq (&ehci->lock); |
187 | ||
cec3a53c AS |
188 | /* Once the controller is stopped, port resumes that are already |
189 | * in progress won't complete. Hence if remote wakeup is enabled | |
190 | * for the root hub and any ports are in the middle of a resume or | |
191 | * remote wakeup, we must fail the suspend. | |
192 | */ | |
193 | if (hcd->self.root_hub->do_remote_wakeup) { | |
194 | port = HCS_N_PORTS(ehci->hcs_params); | |
195 | while (port--) { | |
196 | if (ehci->reset_done[port] != 0) { | |
197 | spin_unlock_irq(&ehci->lock); | |
198 | ehci_dbg(ehci, "suspend failed because " | |
199 | "port %d is resuming\n", | |
200 | port + 1); | |
201 | return -EBUSY; | |
202 | } | |
203 | } | |
204 | } | |
205 | ||
1da177e4 LT |
206 | /* stop schedules, clean any completed work */ |
207 | if (HC_IS_RUNNING(hcd->state)) { | |
208 | ehci_quiesce (ehci); | |
209 | hcd->state = HC_STATE_QUIESCING; | |
210 | } | |
083522d7 | 211 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
7d12e780 | 212 | ehci_work(ehci); |
1da177e4 | 213 | |
8c03356a AS |
214 | /* Unlike other USB host controller types, EHCI doesn't have |
215 | * any notion of "global" or bus-wide suspend. The driver has | |
216 | * to manually suspend all the active unsuspended ports, and | |
217 | * then manually resume them in the bus_resume() routine. | |
218 | */ | |
219 | ehci->bus_suspended = 0; | |
383975d7 | 220 | ehci->owned_ports = 0; |
16032c4f | 221 | changed = 0; |
cec3a53c | 222 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
223 | while (port--) { |
224 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 225 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 226 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 227 | |
8c03356a | 228 | /* keep track of which ports we suspend */ |
383975d7 AS |
229 | if (t1 & PORT_OWNER) |
230 | set_bit(port, &ehci->owned_ports); | |
231 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 232 | t2 |= PORT_SUSPEND; |
8c03356a AS |
233 | set_bit(port, &ehci->bus_suspended); |
234 | } | |
235 | ||
16032c4f | 236 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
237 | if (hcd->self.root_hub->do_remote_wakeup) { |
238 | /* only enable appropriate wake bits, otherwise the | |
239 | * hardware can not go phy low power mode. If a race | |
240 | * condition happens here(connection change during bits | |
241 | * set), the port change detection will finally fix it. | |
242 | */ | |
16032c4f | 243 | if (t1 & PORT_CONNECT) |
331ac6b2 | 244 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 245 | else |
331ac6b2 | 246 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 247 | } |
1da177e4 LT |
248 | |
249 | if (t1 != t2) { | |
250 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
251 | port + 1, t1, t2); | |
083522d7 | 252 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
253 | changed = 1; |
254 | } | |
255 | } | |
331ac6b2 | 256 | |
16032c4f AS |
257 | if (changed && ehci->has_hostpc) { |
258 | spin_unlock_irq(&ehci->lock); | |
259 | msleep(5); /* 5 ms for HCD to enter low-power mode */ | |
260 | spin_lock_irq(&ehci->lock); | |
261 | ||
262 | port = HCS_N_PORTS(ehci->hcs_params); | |
263 | while (port--) { | |
264 | u32 __iomem *hostpc_reg; | |
265 | u32 t3; | |
266 | ||
267 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs | |
268 | + HOSTPC0 + 4 * port); | |
269 | t3 = ehci_readl(ehci, hostpc_reg); | |
270 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
271 | t3 = ehci_readl(ehci, hostpc_reg); | |
272 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
273 | port, (t3 & HOSTPC_PHCD) ? |
274 | "succeeded" : "failed"); | |
1da177e4 LT |
275 | } |
276 | } | |
277 | ||
cd930c93 AS |
278 | /* Apparently some devices need a >= 1-uframe delay here */ |
279 | if (ehci->bus_suspended) | |
280 | udelay(150); | |
281 | ||
1da177e4 LT |
282 | /* turn off now-idle HC */ |
283 | ehci_halt (ehci); | |
284 | hcd->state = HC_STATE_SUSPENDED; | |
285 | ||
cdc647a9 DB |
286 | if (ehci->reclaim) |
287 | end_unlink_async(ehci); | |
288 | ||
8c03356a AS |
289 | /* allow remote wakeup */ |
290 | mask = INTR_MASK; | |
58a97ffe | 291 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 292 | mask &= ~STS_PCD; |
083522d7 BH |
293 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
294 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 295 | |
1da177e4 LT |
296 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
297 | spin_unlock_irq (&ehci->lock); | |
015798b2 JH |
298 | |
299 | /* ehci_work() may have re-enabled the watchdog timer, which we do not | |
300 | * want, and so we must delete any pending watchdog timer events. | |
301 | */ | |
302 | del_timer_sync(&ehci->watchdog); | |
1da177e4 LT |
303 | return 0; |
304 | } | |
305 | ||
306 | ||
307 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 308 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
309 | { |
310 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
311 | u32 temp; | |
383975d7 | 312 | u32 power_okay; |
1da177e4 | 313 | int i; |
3a4e72cb | 314 | u8 resume_needed = 0; |
1da177e4 LT |
315 | |
316 | if (time_before (jiffies, ehci->next_statechange)) | |
317 | msleep(5); | |
318 | spin_lock_irq (&ehci->lock); | |
541c7d43 | 319 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab AS |
320 | spin_unlock_irq(&ehci->lock); |
321 | return -ESHUTDOWN; | |
322 | } | |
1da177e4 | 323 | |
ad45f1dc | 324 | if (unlikely(ehci->debug)) { |
872d3599 | 325 | if (!dbgp_reset_prep()) |
ad45f1dc JW |
326 | ehci->debug = NULL; |
327 | else | |
328 | dbgp_external_startup(); | |
329 | } | |
330 | ||
f03c17fc DB |
331 | /* Ideally and we've got a real resume here, and no port's power |
332 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
333 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
334 | * the last user of the controller, not reset/pm hardware keeping | |
335 | * state we gave to it. | |
336 | */ | |
383975d7 AS |
337 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
338 | ehci_dbg(ehci, "resume root hub%s\n", | |
339 | power_okay ? "" : " after power loss"); | |
f03c17fc | 340 | |
8c03356a AS |
341 | /* at least some APM implementations will try to deliver |
342 | * IRQs right away, so delay them until we're ready. | |
343 | */ | |
083522d7 | 344 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
345 | |
346 | /* re-init operational registers */ | |
083522d7 BH |
347 | ehci_writel(ehci, 0, &ehci->regs->segment); |
348 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
349 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
350 | |
351 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
083522d7 | 352 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 | 353 | |
e198a314 AS |
354 | /* Some controller/firmware combinations need a delay during which |
355 | * they set up the port statuses. See Bugzilla #8190. */ | |
3a4e72cb VP |
356 | spin_unlock_irq(&ehci->lock); |
357 | msleep(8); | |
358 | spin_lock_irq(&ehci->lock); | |
e198a314 | 359 | |
16032c4f AS |
360 | /* clear phy low-power mode before resume */ |
361 | if (ehci->bus_suspended && ehci->has_hostpc) { | |
362 | i = HCS_N_PORTS(ehci->hcs_params); | |
363 | while (i--) { | |
364 | if (test_bit(i, &ehci->bus_suspended)) { | |
365 | u32 __iomem *hostpc_reg; | |
366 | ||
367 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs | |
368 | + HOSTPC0 + 4 * i); | |
369 | temp = ehci_readl(ehci, hostpc_reg); | |
370 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
371 | hostpc_reg); | |
372 | } | |
373 | } | |
374 | spin_unlock_irq(&ehci->lock); | |
375 | msleep(5); | |
376 | spin_lock_irq(&ehci->lock); | |
377 | } | |
378 | ||
8c03356a | 379 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
380 | i = HCS_N_PORTS (ehci->hcs_params); |
381 | while (i--) { | |
083522d7 | 382 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 383 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 384 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 385 | (temp & PORT_SUSPEND)) { |
1da177e4 | 386 | temp |= PORT_RESUME; |
3a4e72cb VP |
387 | resume_needed = 1; |
388 | } | |
083522d7 | 389 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 390 | } |
3a4e72cb VP |
391 | |
392 | /* msleep for 20ms only if code is trying to resume port */ | |
393 | if (resume_needed) { | |
394 | spin_unlock_irq(&ehci->lock); | |
395 | msleep(20); | |
396 | spin_lock_irq(&ehci->lock); | |
397 | } | |
398 | ||
1da177e4 | 399 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 400 | while (i--) { |
083522d7 | 401 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
402 | if (test_bit(i, &ehci->bus_suspended) && |
403 | (temp & PORT_SUSPEND)) { | |
404 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 405 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
406 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
407 | } | |
1da177e4 | 408 | } |
083522d7 | 409 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
410 | |
411 | /* maybe re-activate the schedule(s) */ | |
412 | temp = 0; | |
413 | if (ehci->async->qh_next.qh) | |
414 | temp |= CMD_ASE; | |
415 | if (ehci->periodic_sched) | |
416 | temp |= CMD_PSE; | |
417 | if (temp) { | |
418 | ehci->command |= temp; | |
083522d7 | 419 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
420 | } |
421 | ||
422 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
423 | hcd->state = HC_STATE_RUNNING; | |
424 | ||
425 | /* Now we can safely re-enable irqs */ | |
083522d7 | 426 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
427 | |
428 | spin_unlock_irq (&ehci->lock); | |
3bb1af52 | 429 | ehci_handover_companion_ports(ehci); |
1da177e4 LT |
430 | return 0; |
431 | } | |
432 | ||
433 | #else | |
434 | ||
0c0382e3 AS |
435 | #define ehci_bus_suspend NULL |
436 | #define ehci_bus_resume NULL | |
1da177e4 LT |
437 | |
438 | #endif /* CONFIG_PM */ | |
439 | ||
57e06c11 AS |
440 | /*-------------------------------------------------------------------------*/ |
441 | ||
442 | /* Display the ports dedicated to the companion controller */ | |
5a3201b2 TJ |
443 | static ssize_t show_companion(struct device *dev, |
444 | struct device_attribute *attr, | |
445 | char *buf) | |
57e06c11 AS |
446 | { |
447 | struct ehci_hcd *ehci; | |
448 | int nports, index, n; | |
449 | int count = PAGE_SIZE; | |
450 | char *ptr = buf; | |
451 | ||
5a3201b2 | 452 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); |
57e06c11 AS |
453 | nports = HCS_N_PORTS(ehci->hcs_params); |
454 | ||
455 | for (index = 0; index < nports; ++index) { | |
456 | if (test_bit(index, &ehci->companion_ports)) { | |
457 | n = scnprintf(ptr, count, "%d\n", index + 1); | |
458 | ptr += n; | |
459 | count -= n; | |
460 | } | |
461 | } | |
462 | return ptr - buf; | |
463 | } | |
464 | ||
465 | /* | |
90da096e | 466 | * Sets the owner of a port |
57e06c11 | 467 | */ |
90da096e | 468 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 469 | { |
57e06c11 AS |
470 | u32 __iomem *status_reg; |
471 | u32 port_status; | |
90da096e | 472 | int try; |
57e06c11 | 473 | |
90da096e | 474 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
475 | |
476 | /* | |
477 | * The controller won't set the OWNER bit if the port is | |
478 | * enabled, so this loop will sometimes require at least two | |
479 | * iterations: one to disable the port and one to set OWNER. | |
480 | */ | |
57e06c11 AS |
481 | for (try = 4; try > 0; --try) { |
482 | spin_lock_irq(&ehci->lock); | |
483 | port_status = ehci_readl(ehci, status_reg); | |
484 | if ((port_status & PORT_OWNER) == new_owner | |
485 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
486 | == 0) | |
487 | try = 0; | |
488 | else { | |
489 | port_status ^= PORT_OWNER; | |
490 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
491 | ehci_writel(ehci, port_status, status_reg); | |
492 | } | |
493 | spin_unlock_irq(&ehci->lock); | |
494 | if (try > 1) | |
495 | msleep(5); | |
496 | } | |
90da096e BR |
497 | } |
498 | ||
499 | /* | |
500 | * Dedicate or undedicate a port to the companion controller. | |
501 | * Syntax is "[-]portnum", where a leading '-' sign means | |
502 | * return control of the port to the EHCI controller. | |
503 | */ | |
504 | static ssize_t store_companion(struct device *dev, | |
505 | struct device_attribute *attr, | |
506 | const char *buf, size_t count) | |
507 | { | |
508 | struct ehci_hcd *ehci; | |
509 | int portnum, new_owner; | |
510 | ||
511 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); | |
512 | new_owner = PORT_OWNER; /* Owned by companion */ | |
513 | if (sscanf(buf, "%d", &portnum) != 1) | |
514 | return -EINVAL; | |
515 | if (portnum < 0) { | |
516 | portnum = - portnum; | |
517 | new_owner = 0; /* Owned by EHCI */ | |
518 | } | |
519 | if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | |
520 | return -ENOENT; | |
521 | portnum--; | |
522 | if (new_owner) | |
523 | set_bit(portnum, &ehci->companion_ports); | |
524 | else | |
525 | clear_bit(portnum, &ehci->companion_ports); | |
526 | set_owner(ehci, portnum, new_owner); | |
57e06c11 AS |
527 | return count; |
528 | } | |
5a3201b2 | 529 | static DEVICE_ATTR(companion, 0644, show_companion, store_companion); |
57e06c11 AS |
530 | |
531 | static inline void create_companion_file(struct ehci_hcd *ehci) | |
532 | { | |
533 | int i; | |
534 | ||
535 | /* with integrated TT there is no companion! */ | |
536 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 537 | i = device_create_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 538 | &dev_attr_companion); |
57e06c11 AS |
539 | } |
540 | ||
541 | static inline void remove_companion_file(struct ehci_hcd *ehci) | |
542 | { | |
543 | /* with integrated TT there is no companion! */ | |
544 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 545 | device_remove_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 546 | &dev_attr_companion); |
57e06c11 AS |
547 | } |
548 | ||
549 | ||
1da177e4 LT |
550 | /*-------------------------------------------------------------------------*/ |
551 | ||
552 | static int check_reset_complete ( | |
553 | struct ehci_hcd *ehci, | |
554 | int index, | |
e6316565 | 555 | u32 __iomem *status_reg, |
1da177e4 LT |
556 | int port_status |
557 | ) { | |
cd4cdc93 | 558 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 559 | return port_status; |
1da177e4 LT |
560 | |
561 | /* if reset finished and it's still not enabled -- handoff */ | |
562 | if (!(port_status & PORT_PE)) { | |
563 | ||
564 | /* with integrated TT, there's nobody to hand it to! */ | |
565 | if (ehci_is_TDI(ehci)) { | |
566 | ehci_dbg (ehci, | |
567 | "Failed to enable port %d on root hub TT\n", | |
568 | index+1); | |
569 | return port_status; | |
570 | } | |
571 | ||
572 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
573 | index + 1); | |
574 | ||
575 | // what happens if HCS_N_CC(params) == 0 ? | |
576 | port_status |= PORT_OWNER; | |
10f6524a | 577 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 578 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 579 | |
796bcae7 VB |
580 | /* ensure 440EPX ohci controller state is operational */ |
581 | if (ehci->has_amcc_usb23) | |
582 | set_ohci_hcfs(ehci, 1); | |
583 | } else { | |
1da177e4 | 584 | ehci_dbg (ehci, "port %d high speed\n", index + 1); |
796bcae7 VB |
585 | /* ensure 440EPx ohci controller state is suspended */ |
586 | if (ehci->has_amcc_usb23) | |
587 | set_ohci_hcfs(ehci, 0); | |
588 | } | |
1da177e4 LT |
589 | |
590 | return port_status; | |
591 | } | |
592 | ||
593 | /*-------------------------------------------------------------------------*/ | |
594 | ||
595 | ||
596 | /* build "status change" packet (one or two bytes) from HC registers */ | |
597 | ||
598 | static int | |
599 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
600 | { | |
601 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
602 | u32 temp, status = 0; | |
93f1a47c | 603 | u32 mask; |
1da177e4 LT |
604 | int ports, i, retval = 1; |
605 | unsigned long flags; | |
5a9cdf33 | 606 | u32 ppcd = 0; |
1da177e4 LT |
607 | |
608 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
609 | if (!HC_IS_RUNNING(hcd->state)) | |
610 | return 0; | |
611 | ||
612 | /* init status to no-changes */ | |
613 | buf [0] = 0; | |
614 | ports = HCS_N_PORTS (ehci->hcs_params); | |
615 | if (ports > 7) { | |
616 | buf [1] = 0; | |
617 | retval++; | |
618 | } | |
53bd6a60 | 619 | |
93f1a47c DB |
620 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
621 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 622 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
623 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
624 | * PORT_POWER; that's surprising, but maybe within-spec. | |
625 | */ | |
626 | if (!ignore_oc) | |
627 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
628 | else | |
629 | mask = PORT_CSC | PORT_PEC; | |
630 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
631 | ||
1da177e4 LT |
632 | /* no hub change reports (bit 0) for now (power, ...) */ |
633 | ||
634 | /* port N changes (bit N)? */ | |
635 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
636 | |
637 | /* get per-port change detect bits */ | |
638 | if (ehci->has_ppcd) | |
639 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
640 | ||
1da177e4 | 641 | for (i = 0; i < ports; i++) { |
5a9cdf33 AD |
642 | /* leverage per-port change bits feature */ |
643 | if (ehci->has_ppcd && !(ppcd & (1 << i))) | |
644 | continue; | |
083522d7 | 645 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
646 | |
647 | /* | |
648 | * Return status information even for ports with OWNER set. | |
649 | * Otherwise khubd wouldn't see the disconnect event when a | |
650 | * high-speed device is switched over to the companion | |
651 | * controller by the user. | |
652 | */ | |
653 | ||
eafe5b99 AS |
654 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
655 | || (ehci->reset_done[i] && time_after_eq( | |
656 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
657 | if (i < 7) |
658 | buf [0] |= 1 << (i + 1); | |
659 | else | |
660 | buf [1] |= 1 << (i - 7); | |
661 | status = STS_PCD; | |
662 | } | |
663 | } | |
664 | /* FIXME autosuspend idle root hubs */ | |
665 | spin_unlock_irqrestore (&ehci->lock, flags); | |
666 | return status ? retval : 0; | |
667 | } | |
668 | ||
669 | /*-------------------------------------------------------------------------*/ | |
670 | ||
671 | static void | |
672 | ehci_hub_descriptor ( | |
673 | struct ehci_hcd *ehci, | |
674 | struct usb_hub_descriptor *desc | |
675 | ) { | |
676 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
677 | u16 temp; | |
678 | ||
679 | desc->bDescriptorType = 0x29; | |
680 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
681 | desc->bHubContrCurrent = 0; | |
682 | ||
683 | desc->bNbrPorts = ports; | |
684 | temp = 1 + (ports / 8); | |
685 | desc->bDescLength = 7 + 2 * temp; | |
686 | ||
687 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
688 | memset (&desc->bitmap [0], 0, temp); | |
689 | memset (&desc->bitmap [temp], 0xff, temp); | |
690 | ||
691 | temp = 0x0008; /* per-port overcurrent reporting */ | |
692 | if (HCS_PPC (ehci->hcs_params)) | |
693 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
694 | else |
695 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
696 | #if 0 |
697 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
698 | if (HCS_INDICATOR (ehci->hcs_params)) | |
699 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
700 | #endif | |
fd05e720 | 701 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
702 | } |
703 | ||
704 | /*-------------------------------------------------------------------------*/ | |
705 | ||
1da177e4 LT |
706 | static int ehci_hub_control ( |
707 | struct usb_hcd *hcd, | |
708 | u16 typeReq, | |
709 | u16 wValue, | |
710 | u16 wIndex, | |
711 | char *buf, | |
712 | u16 wLength | |
713 | ) { | |
714 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
715 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
716 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
717 | (wIndex & 0xff) - 1]; | |
331ac6b2 AD |
718 | u32 __iomem *hostpc_reg = NULL; |
719 | u32 temp, temp1, status; | |
1da177e4 LT |
720 | unsigned long flags; |
721 | int retval = 0; | |
f0d7f273 | 722 | unsigned selector; |
1da177e4 LT |
723 | |
724 | /* | |
725 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
726 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
727 | * (track current state ourselves) ... blink for diagnostics, | |
728 | * power, "this is the one", etc. EHCI spec supports this. | |
729 | */ | |
730 | ||
331ac6b2 AD |
731 | if (ehci->has_hostpc) |
732 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs | |
733 | + HOSTPC0 + 4 * ((wIndex & 0xff) - 1)); | |
1da177e4 LT |
734 | spin_lock_irqsave (&ehci->lock, flags); |
735 | switch (typeReq) { | |
736 | case ClearHubFeature: | |
737 | switch (wValue) { | |
738 | case C_HUB_LOCAL_POWER: | |
739 | case C_HUB_OVER_CURRENT: | |
740 | /* no hub-wide feature/status flags */ | |
741 | break; | |
742 | default: | |
743 | goto error; | |
744 | } | |
745 | break; | |
746 | case ClearPortFeature: | |
747 | if (!wIndex || wIndex > ports) | |
748 | goto error; | |
749 | wIndex--; | |
e6316565 | 750 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
751 | |
752 | /* | |
753 | * Even if OWNER is set, so the port is owned by the | |
754 | * companion controller, khubd needs to be able to clear | |
755 | * the port-change status bits (especially | |
749da5f8 | 756 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 757 | */ |
1da177e4 LT |
758 | |
759 | switch (wValue) { | |
760 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 761 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
762 | break; |
763 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 764 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 765 | status_reg); |
1da177e4 LT |
766 | break; |
767 | case USB_PORT_FEAT_SUSPEND: | |
768 | if (temp & PORT_RESET) | |
769 | goto error; | |
f8aeb3bb DB |
770 | if (ehci->no_selective_suspend) |
771 | break; | |
16032c4f AS |
772 | if (!(temp & PORT_SUSPEND)) |
773 | break; | |
774 | if ((temp & PORT_PE) == 0) | |
775 | goto error; | |
776 | ||
777 | /* clear phy low-power mode before resume */ | |
778 | if (hostpc_reg) { | |
779 | temp1 = ehci_readl(ehci, hostpc_reg); | |
780 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 781 | hostpc_reg); |
16032c4f AS |
782 | spin_unlock_irqrestore(&ehci->lock, flags); |
783 | msleep(5);/* wait to leave low-power mode */ | |
784 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 785 | } |
16032c4f AS |
786 | /* resume signaling for 20 msec */ |
787 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); | |
788 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); | |
789 | ehci->reset_done[wIndex] = jiffies | |
790 | + msecs_to_jiffies(20); | |
1da177e4 LT |
791 | break; |
792 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 793 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
794 | break; |
795 | case USB_PORT_FEAT_POWER: | |
796 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
797 | ehci_writel(ehci, |
798 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 799 | status_reg); |
1da177e4 LT |
800 | break; |
801 | case USB_PORT_FEAT_C_CONNECTION: | |
48f24970 AD |
802 | if (ehci->has_lpm) { |
803 | /* clear PORTSC bits on disconnect */ | |
804 | temp &= ~PORT_LPM; | |
805 | temp &= ~PORT_DEV_ADDR; | |
806 | } | |
083522d7 | 807 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 808 | status_reg); |
1da177e4 LT |
809 | break; |
810 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 811 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 812 | status_reg); |
1da177e4 LT |
813 | break; |
814 | case USB_PORT_FEAT_C_RESET: | |
815 | /* GetPortStatus clears reset */ | |
816 | break; | |
817 | default: | |
818 | goto error; | |
819 | } | |
083522d7 | 820 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
821 | break; |
822 | case GetHubDescriptor: | |
823 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
824 | buf); | |
825 | break; | |
826 | case GetHubStatus: | |
827 | /* no hub-wide feature/status flags */ | |
828 | memset (buf, 0, 4); | |
829 | //cpu_to_le32s ((u32 *) buf); | |
830 | break; | |
831 | case GetPortStatus: | |
832 | if (!wIndex || wIndex > ports) | |
833 | goto error; | |
834 | wIndex--; | |
835 | status = 0; | |
e6316565 | 836 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
837 | |
838 | // wPortChange bits | |
839 | if (temp & PORT_CSC) | |
749da5f8 | 840 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 841 | if (temp & PORT_PEC) |
749da5f8 | 842 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
843 | |
844 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 845 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 846 | |
756aa6b3 CE |
847 | /* |
848 | * Hubs should disable port power on over-current. | |
849 | * However, not all EHCI implementations do this | |
850 | * automatically, even if they _do_ support per-port | |
851 | * power switching; they're allowed to just limit the | |
852 | * current. khubd will turn the power back on. | |
853 | */ | |
854 | if (HCS_PPC (ehci->hcs_params)){ | |
855 | ehci_writel(ehci, | |
856 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
857 | status_reg); | |
858 | } | |
859 | } | |
860 | ||
1da177e4 | 861 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
862 | if (temp & PORT_RESUME) { |
863 | ||
864 | /* Remote Wakeup received? */ | |
865 | if (!ehci->reset_done[wIndex]) { | |
866 | /* resume signaling for 20 msec */ | |
867 | ehci->reset_done[wIndex] = jiffies | |
868 | + msecs_to_jiffies(20); | |
869 | /* check the port again */ | |
870 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
871 | ehci->reset_done[wIndex]); | |
872 | } | |
1da177e4 | 873 | |
629e4427 AS |
874 | /* resume completed? */ |
875 | else if (time_after_eq(jiffies, | |
876 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 877 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 878 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 AS |
879 | ehci->reset_done[wIndex] = 0; |
880 | ||
881 | /* stop resume signaling */ | |
882 | temp = ehci_readl(ehci, status_reg); | |
883 | ehci_writel(ehci, | |
e6316565 AS |
884 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
885 | status_reg); | |
629e4427 | 886 | retval = handshake(ehci, status_reg, |
083522d7 | 887 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
888 | if (retval != 0) { |
889 | ehci_err(ehci, | |
890 | "port %d resume error %d\n", | |
891 | wIndex + 1, retval); | |
892 | goto error; | |
893 | } | |
894 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 895 | } |
1da177e4 LT |
896 | } |
897 | ||
898 | /* whoever resets must GetPortStatus to complete it!! */ | |
899 | if ((temp & PORT_RESET) | |
629e4427 AS |
900 | && time_after_eq(jiffies, |
901 | ehci->reset_done[wIndex])) { | |
749da5f8 | 902 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 LT |
903 | ehci->reset_done [wIndex] = 0; |
904 | ||
905 | /* force reset to complete */ | |
083522d7 | 906 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 907 | status_reg); |
c22fa3ac DB |
908 | /* REVISIT: some hardware needs 550+ usec to clear |
909 | * this bit; seems too long to spin routinely... | |
910 | */ | |
e6316565 | 911 | retval = handshake(ehci, status_reg, |
6307e096 | 912 | PORT_RESET, 0, 1000); |
1da177e4 LT |
913 | if (retval != 0) { |
914 | ehci_err (ehci, "port %d reset error %d\n", | |
915 | wIndex + 1, retval); | |
916 | goto error; | |
917 | } | |
918 | ||
919 | /* see what we found out */ | |
e6316565 AS |
920 | temp = check_reset_complete (ehci, wIndex, status_reg, |
921 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
922 | } |
923 | ||
eafe5b99 AS |
924 | if (!(temp & (PORT_RESUME|PORT_RESET))) |
925 | ehci->reset_done[wIndex] = 0; | |
926 | ||
57e06c11 AS |
927 | /* transfer dedicated ports to the companion hc */ |
928 | if ((temp & PORT_CONNECT) && | |
929 | test_bit(wIndex, &ehci->companion_ports)) { | |
930 | temp &= ~PORT_RWC_BITS; | |
931 | temp |= PORT_OWNER; | |
932 | ehci_writel(ehci, temp, status_reg); | |
933 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
934 | temp = ehci_readl(ehci, status_reg); | |
935 | } | |
936 | ||
625b5c9a AS |
937 | /* |
938 | * Even if OWNER is set, there's no harm letting khubd | |
939 | * see the wPortStatus values (they should all be 0 except | |
940 | * for PORT_POWER anyway). | |
941 | */ | |
942 | ||
943 | if (temp & PORT_CONNECT) { | |
749da5f8 | 944 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 945 | // status may be from integrated TT |
331ac6b2 AD |
946 | if (ehci->has_hostpc) { |
947 | temp1 = ehci_readl(ehci, hostpc_reg); | |
948 | status |= ehci_port_speed(ehci, temp1); | |
949 | } else | |
950 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 951 | } |
625b5c9a | 952 | if (temp & PORT_PE) |
749da5f8 | 953 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
954 | |
955 | /* maybe the port was unsuspended without our knowledge */ | |
956 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 957 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
958 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
959 | clear_bit(wIndex, &ehci->suspended_ports); | |
960 | ehci->reset_done[wIndex] = 0; | |
961 | if (temp & PORT_PE) | |
962 | set_bit(wIndex, &ehci->port_c_suspend); | |
963 | } | |
964 | ||
625b5c9a | 965 | if (temp & PORT_OC) |
749da5f8 | 966 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 967 | if (temp & PORT_RESET) |
749da5f8 | 968 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 969 | if (temp & PORT_POWER) |
749da5f8 | 970 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 971 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 972 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 973 | |
9776afc8 | 974 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
975 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
976 | #endif | |
977 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 978 | put_unaligned_le32(status, buf); |
1da177e4 LT |
979 | break; |
980 | case SetHubFeature: | |
981 | switch (wValue) { | |
982 | case C_HUB_LOCAL_POWER: | |
983 | case C_HUB_OVER_CURRENT: | |
984 | /* no hub-wide feature/status flags */ | |
985 | break; | |
986 | default: | |
987 | goto error; | |
988 | } | |
989 | break; | |
990 | case SetPortFeature: | |
f0d7f273 DB |
991 | selector = wIndex >> 8; |
992 | wIndex &= 0xff; | |
8d053c79 JW |
993 | if (unlikely(ehci->debug)) { |
994 | /* If the debug port is active any port | |
995 | * feature requests should get denied */ | |
996 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
997 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
998 | retval = -ENODEV; | |
999 | goto error_exit; | |
1000 | } | |
1001 | } | |
1da177e4 LT |
1002 | if (!wIndex || wIndex > ports) |
1003 | goto error; | |
1004 | wIndex--; | |
e6316565 | 1005 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1006 | if (temp & PORT_OWNER) |
1007 | break; | |
1008 | ||
10f6524a | 1009 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1010 | switch (wValue) { |
1011 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1012 | if (ehci->no_selective_suspend) |
1013 | break; | |
1da177e4 LT |
1014 | if ((temp & PORT_PE) == 0 |
1015 | || (temp & PORT_RESET) != 0) | |
1016 | goto error; | |
b9df7942 | 1017 | |
331ac6b2 AD |
1018 | /* After above check the port must be connected. |
1019 | * Set appropriate bit thus could put phy into low power | |
1020 | * mode if we have hostpc feature | |
1021 | */ | |
b9df7942 AD |
1022 | temp &= ~PORT_WKCONN_E; |
1023 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1024 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
331ac6b2 | 1025 | if (hostpc_reg) { |
b9df7942 | 1026 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1027 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1028 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1029 | temp1 = ehci_readl(ehci, hostpc_reg); |
1030 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1031 | hostpc_reg); | |
1032 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1033 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1034 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1035 | "succeeded" : "failed"); | |
1036 | } | |
eafe5b99 | 1037 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1038 | break; |
1039 | case USB_PORT_FEAT_POWER: | |
1040 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 1041 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 1042 | status_reg); |
1da177e4 LT |
1043 | break; |
1044 | case USB_PORT_FEAT_RESET: | |
1045 | if (temp & PORT_RESUME) | |
1046 | goto error; | |
1047 | /* line status bits may report this as low speed, | |
1048 | * which can be fine if this root hub has a | |
1049 | * transaction translator built in. | |
1050 | */ | |
1051 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1052 | && !ehci_is_TDI(ehci) | |
1053 | && PORT_USB11 (temp)) { | |
1054 | ehci_dbg (ehci, | |
1055 | "port %d low speed --> companion\n", | |
1056 | wIndex + 1); | |
1057 | temp |= PORT_OWNER; | |
1058 | } else { | |
1059 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
1060 | temp |= PORT_RESET; | |
1061 | temp &= ~PORT_PE; | |
1062 | ||
1063 | /* | |
1064 | * caller must wait, then call GetPortStatus | |
1065 | * usb 2.0 spec says 50 ms resets on root | |
1066 | */ | |
1067 | ehci->reset_done [wIndex] = jiffies | |
1068 | + msecs_to_jiffies (50); | |
1069 | } | |
e6316565 | 1070 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1071 | break; |
f0d7f273 DB |
1072 | |
1073 | /* For downstream facing ports (these): one hub port is put | |
1074 | * into test mode according to USB2 11.24.2.13, then the hub | |
1075 | * must be reset (which for root hub now means rmmod+modprobe, | |
1076 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1077 | * about the EHCI-specific stuff. | |
1078 | */ | |
1079 | case USB_PORT_FEAT_TEST: | |
1080 | if (!selector || selector > 5) | |
1081 | goto error; | |
1082 | ehci_quiesce(ehci); | |
1083 | ehci_halt(ehci); | |
1084 | temp |= selector << 16; | |
e6316565 | 1085 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1086 | break; |
1087 | ||
1da177e4 LT |
1088 | default: |
1089 | goto error; | |
1090 | } | |
083522d7 | 1091 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1092 | break; |
1093 | ||
1094 | default: | |
1095 | error: | |
1096 | /* "stall" on error */ | |
1097 | retval = -EPIPE; | |
1098 | } | |
8d053c79 | 1099 | error_exit: |
1da177e4 LT |
1100 | spin_unlock_irqrestore (&ehci->lock, flags); |
1101 | return retval; | |
1102 | } | |
90da096e BR |
1103 | |
1104 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) | |
1105 | { | |
1106 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1107 | ||
1108 | if (ehci_is_TDI(ehci)) | |
1109 | return; | |
1110 | set_owner(ehci, --portnum, PORT_OWNER); | |
1111 | } | |
1112 | ||
3a31155c AS |
1113 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
1114 | { | |
1115 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1116 | u32 __iomem *reg; | |
1117 | ||
1118 | if (ehci_is_TDI(ehci)) | |
1119 | return 0; | |
1120 | reg = &ehci->regs->port_status[portnum - 1]; | |
1121 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1122 | } |