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 | ||
31 | #ifdef CONFIG_PM | |
32 | ||
0c0382e3 | 33 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
34 | { |
35 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
36 | int port; | |
8c03356a | 37 | int mask; |
1da177e4 | 38 | |
8c774fe8 AS |
39 | ehci_dbg(ehci, "suspend root hub\n"); |
40 | ||
1da177e4 LT |
41 | if (time_before (jiffies, ehci->next_statechange)) |
42 | msleep(5); | |
43 | ||
44 | port = HCS_N_PORTS (ehci->hcs_params); | |
45 | spin_lock_irq (&ehci->lock); | |
46 | ||
47 | /* stop schedules, clean any completed work */ | |
48 | if (HC_IS_RUNNING(hcd->state)) { | |
49 | ehci_quiesce (ehci); | |
50 | hcd->state = HC_STATE_QUIESCING; | |
51 | } | |
083522d7 | 52 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
1da177e4 | 53 | if (ehci->reclaim) |
64f89798 | 54 | ehci->reclaim_ready = 1; |
7d12e780 | 55 | ehci_work(ehci); |
1da177e4 | 56 | |
8c03356a AS |
57 | /* Unlike other USB host controller types, EHCI doesn't have |
58 | * any notion of "global" or bus-wide suspend. The driver has | |
59 | * to manually suspend all the active unsuspended ports, and | |
60 | * then manually resume them in the bus_resume() routine. | |
61 | */ | |
62 | ehci->bus_suspended = 0; | |
1da177e4 LT |
63 | while (port--) { |
64 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 65 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
1da177e4 LT |
66 | u32 t2 = t1; |
67 | ||
8c03356a AS |
68 | /* keep track of which ports we suspend */ |
69 | if ((t1 & PORT_PE) && !(t1 & PORT_OWNER) && | |
70 | !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 71 | t2 |= PORT_SUSPEND; |
8c03356a AS |
72 | set_bit(port, &ehci->bus_suspended); |
73 | } | |
74 | ||
75 | /* enable remote wakeup on all ports */ | |
2c1c3c4c | 76 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
77 | t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E; |
78 | else | |
79 | t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); | |
80 | ||
81 | if (t1 != t2) { | |
82 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
83 | port + 1, t1, t2); | |
083522d7 | 84 | ehci_writel(ehci, t2, reg); |
1da177e4 LT |
85 | } |
86 | } | |
87 | ||
88 | /* turn off now-idle HC */ | |
4756ae5b | 89 | del_timer_sync (&ehci->watchdog); |
1da177e4 LT |
90 | ehci_halt (ehci); |
91 | hcd->state = HC_STATE_SUSPENDED; | |
92 | ||
8c03356a AS |
93 | /* allow remote wakeup */ |
94 | mask = INTR_MASK; | |
95 | if (!device_may_wakeup(&hcd->self.root_hub->dev)) | |
96 | mask &= ~STS_PCD; | |
083522d7 BH |
97 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
98 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 99 | |
1da177e4 LT |
100 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
101 | spin_unlock_irq (&ehci->lock); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | ||
106 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 107 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
108 | { |
109 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
110 | u32 temp; | |
111 | int i; | |
1da177e4 LT |
112 | |
113 | if (time_before (jiffies, ehci->next_statechange)) | |
114 | msleep(5); | |
115 | spin_lock_irq (&ehci->lock); | |
116 | ||
f03c17fc DB |
117 | /* Ideally and we've got a real resume here, and no port's power |
118 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
119 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
120 | * the last user of the controller, not reset/pm hardware keeping | |
121 | * state we gave to it. | |
122 | */ | |
083522d7 | 123 | temp = ehci_readl(ehci, &ehci->regs->intr_enable); |
8c03356a | 124 | ehci_dbg(ehci, "resume root hub%s\n", temp ? "" : " after power loss"); |
f03c17fc | 125 | |
8c03356a AS |
126 | /* at least some APM implementations will try to deliver |
127 | * IRQs right away, so delay them until we're ready. | |
128 | */ | |
083522d7 | 129 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
130 | |
131 | /* re-init operational registers */ | |
083522d7 BH |
132 | ehci_writel(ehci, 0, &ehci->regs->segment); |
133 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
134 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
135 | |
136 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
083522d7 | 137 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 | 138 | |
e198a314 AS |
139 | /* Some controller/firmware combinations need a delay during which |
140 | * they set up the port statuses. See Bugzilla #8190. */ | |
141 | mdelay(8); | |
142 | ||
8c03356a | 143 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
144 | i = HCS_N_PORTS (ehci->hcs_params); |
145 | while (i--) { | |
083522d7 | 146 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
10f6524a DB |
147 | temp &= ~(PORT_RWC_BITS |
148 | | PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E); | |
8c03356a AS |
149 | if (test_bit(i, &ehci->bus_suspended) && |
150 | (temp & PORT_SUSPEND)) { | |
1da177e4 LT |
151 | ehci->reset_done [i] = jiffies + msecs_to_jiffies (20); |
152 | temp |= PORT_RESUME; | |
153 | } | |
083522d7 | 154 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 LT |
155 | } |
156 | i = HCS_N_PORTS (ehci->hcs_params); | |
157 | mdelay (20); | |
158 | while (i--) { | |
083522d7 | 159 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
160 | if (test_bit(i, &ehci->bus_suspended) && |
161 | (temp & PORT_SUSPEND)) { | |
162 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 163 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
164 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
165 | } | |
1da177e4 | 166 | } |
083522d7 | 167 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
168 | |
169 | /* maybe re-activate the schedule(s) */ | |
170 | temp = 0; | |
171 | if (ehci->async->qh_next.qh) | |
172 | temp |= CMD_ASE; | |
173 | if (ehci->periodic_sched) | |
174 | temp |= CMD_PSE; | |
175 | if (temp) { | |
176 | ehci->command |= temp; | |
083522d7 | 177 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
178 | } |
179 | ||
180 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
181 | hcd->state = HC_STATE_RUNNING; | |
182 | ||
183 | /* Now we can safely re-enable irqs */ | |
083522d7 | 184 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
185 | |
186 | spin_unlock_irq (&ehci->lock); | |
187 | return 0; | |
188 | } | |
189 | ||
190 | #else | |
191 | ||
0c0382e3 AS |
192 | #define ehci_bus_suspend NULL |
193 | #define ehci_bus_resume NULL | |
1da177e4 LT |
194 | |
195 | #endif /* CONFIG_PM */ | |
196 | ||
57e06c11 AS |
197 | /*-------------------------------------------------------------------------*/ |
198 | ||
199 | /* Display the ports dedicated to the companion controller */ | |
200 | static ssize_t show_companion(struct class_device *class_dev, char *buf) | |
201 | { | |
202 | struct ehci_hcd *ehci; | |
203 | int nports, index, n; | |
204 | int count = PAGE_SIZE; | |
205 | char *ptr = buf; | |
206 | ||
207 | ehci = hcd_to_ehci(bus_to_hcd(class_get_devdata(class_dev))); | |
208 | nports = HCS_N_PORTS(ehci->hcs_params); | |
209 | ||
210 | for (index = 0; index < nports; ++index) { | |
211 | if (test_bit(index, &ehci->companion_ports)) { | |
212 | n = scnprintf(ptr, count, "%d\n", index + 1); | |
213 | ptr += n; | |
214 | count -= n; | |
215 | } | |
216 | } | |
217 | return ptr - buf; | |
218 | } | |
219 | ||
220 | /* | |
221 | * Dedicate or undedicate a port to the companion controller. | |
222 | * Syntax is "[-]portnum", where a leading '-' sign means | |
223 | * return control of the port to the EHCI controller. | |
224 | */ | |
225 | static ssize_t store_companion(struct class_device *class_dev, | |
226 | const char *buf, size_t count) | |
227 | { | |
228 | struct ehci_hcd *ehci; | |
229 | int portnum, new_owner, try; | |
230 | u32 __iomem *status_reg; | |
231 | u32 port_status; | |
232 | ||
233 | ehci = hcd_to_ehci(bus_to_hcd(class_get_devdata(class_dev))); | |
234 | new_owner = PORT_OWNER; /* Owned by companion */ | |
235 | if (sscanf(buf, "%d", &portnum) != 1) | |
236 | return -EINVAL; | |
237 | if (portnum < 0) { | |
238 | portnum = - portnum; | |
239 | new_owner = 0; /* Owned by EHCI */ | |
240 | } | |
241 | if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | |
242 | return -ENOENT; | |
243 | status_reg = &ehci->regs->port_status[--portnum]; | |
244 | if (new_owner) | |
245 | set_bit(portnum, &ehci->companion_ports); | |
246 | else | |
247 | clear_bit(portnum, &ehci->companion_ports); | |
248 | ||
249 | /* | |
250 | * The controller won't set the OWNER bit if the port is | |
251 | * enabled, so this loop will sometimes require at least two | |
252 | * iterations: one to disable the port and one to set OWNER. | |
253 | */ | |
254 | ||
255 | for (try = 4; try > 0; --try) { | |
256 | spin_lock_irq(&ehci->lock); | |
257 | port_status = ehci_readl(ehci, status_reg); | |
258 | if ((port_status & PORT_OWNER) == new_owner | |
259 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
260 | == 0) | |
261 | try = 0; | |
262 | else { | |
263 | port_status ^= PORT_OWNER; | |
264 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
265 | ehci_writel(ehci, port_status, status_reg); | |
266 | } | |
267 | spin_unlock_irq(&ehci->lock); | |
268 | if (try > 1) | |
269 | msleep(5); | |
270 | } | |
271 | return count; | |
272 | } | |
273 | static CLASS_DEVICE_ATTR(companion, 0644, show_companion, store_companion); | |
274 | ||
275 | static inline void create_companion_file(struct ehci_hcd *ehci) | |
276 | { | |
277 | int i; | |
278 | ||
279 | /* with integrated TT there is no companion! */ | |
280 | if (!ehci_is_TDI(ehci)) | |
281 | i = class_device_create_file(ehci_to_hcd(ehci)->self.class_dev, | |
282 | &class_device_attr_companion); | |
283 | } | |
284 | ||
285 | static inline void remove_companion_file(struct ehci_hcd *ehci) | |
286 | { | |
287 | /* with integrated TT there is no companion! */ | |
288 | if (!ehci_is_TDI(ehci)) | |
289 | class_device_remove_file(ehci_to_hcd(ehci)->self.class_dev, | |
290 | &class_device_attr_companion); | |
291 | } | |
292 | ||
293 | ||
1da177e4 LT |
294 | /*-------------------------------------------------------------------------*/ |
295 | ||
296 | static int check_reset_complete ( | |
297 | struct ehci_hcd *ehci, | |
298 | int index, | |
e6316565 | 299 | u32 __iomem *status_reg, |
1da177e4 LT |
300 | int port_status |
301 | ) { | |
302 | if (!(port_status & PORT_CONNECT)) { | |
303 | ehci->reset_done [index] = 0; | |
304 | return port_status; | |
305 | } | |
306 | ||
307 | /* if reset finished and it's still not enabled -- handoff */ | |
308 | if (!(port_status & PORT_PE)) { | |
309 | ||
310 | /* with integrated TT, there's nobody to hand it to! */ | |
311 | if (ehci_is_TDI(ehci)) { | |
312 | ehci_dbg (ehci, | |
313 | "Failed to enable port %d on root hub TT\n", | |
314 | index+1); | |
315 | return port_status; | |
316 | } | |
317 | ||
318 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
319 | index + 1); | |
320 | ||
321 | // what happens if HCS_N_CC(params) == 0 ? | |
322 | port_status |= PORT_OWNER; | |
10f6524a | 323 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 324 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 LT |
325 | |
326 | } else | |
327 | ehci_dbg (ehci, "port %d high speed\n", index + 1); | |
328 | ||
329 | return port_status; | |
330 | } | |
331 | ||
332 | /*-------------------------------------------------------------------------*/ | |
333 | ||
334 | ||
335 | /* build "status change" packet (one or two bytes) from HC registers */ | |
336 | ||
337 | static int | |
338 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
339 | { | |
340 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
341 | u32 temp, status = 0; | |
93f1a47c | 342 | u32 mask; |
1da177e4 LT |
343 | int ports, i, retval = 1; |
344 | unsigned long flags; | |
345 | ||
346 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
347 | if (!HC_IS_RUNNING(hcd->state)) | |
348 | return 0; | |
349 | ||
350 | /* init status to no-changes */ | |
351 | buf [0] = 0; | |
352 | ports = HCS_N_PORTS (ehci->hcs_params); | |
353 | if (ports > 7) { | |
354 | buf [1] = 0; | |
355 | retval++; | |
356 | } | |
53bd6a60 | 357 | |
93f1a47c DB |
358 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
359 | * causing massive log spam unless we completely ignore them. It | |
360 | * may be relevant that VIA VT8235 controlers, where PORT_POWER is | |
361 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to | |
362 | * PORT_POWER; that's surprising, but maybe within-spec. | |
363 | */ | |
364 | if (!ignore_oc) | |
365 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
366 | else | |
367 | mask = PORT_CSC | PORT_PEC; | |
368 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
369 | ||
1da177e4 LT |
370 | /* no hub change reports (bit 0) for now (power, ...) */ |
371 | ||
372 | /* port N changes (bit N)? */ | |
373 | spin_lock_irqsave (&ehci->lock, flags); | |
374 | for (i = 0; i < ports; i++) { | |
083522d7 | 375 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
376 | |
377 | /* | |
378 | * Return status information even for ports with OWNER set. | |
379 | * Otherwise khubd wouldn't see the disconnect event when a | |
380 | * high-speed device is switched over to the companion | |
381 | * controller by the user. | |
382 | */ | |
383 | ||
1da177e4 LT |
384 | if (!(temp & PORT_CONNECT)) |
385 | ehci->reset_done [i] = 0; | |
93f1a47c | 386 | if ((temp & mask) != 0 |
1da177e4 | 387 | || ((temp & PORT_RESUME) != 0 |
629e4427 AS |
388 | && time_after_eq(jiffies, |
389 | ehci->reset_done[i]))) { | |
1da177e4 LT |
390 | if (i < 7) |
391 | buf [0] |= 1 << (i + 1); | |
392 | else | |
393 | buf [1] |= 1 << (i - 7); | |
394 | status = STS_PCD; | |
395 | } | |
396 | } | |
397 | /* FIXME autosuspend idle root hubs */ | |
398 | spin_unlock_irqrestore (&ehci->lock, flags); | |
399 | return status ? retval : 0; | |
400 | } | |
401 | ||
402 | /*-------------------------------------------------------------------------*/ | |
403 | ||
404 | static void | |
405 | ehci_hub_descriptor ( | |
406 | struct ehci_hcd *ehci, | |
407 | struct usb_hub_descriptor *desc | |
408 | ) { | |
409 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
410 | u16 temp; | |
411 | ||
412 | desc->bDescriptorType = 0x29; | |
413 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
414 | desc->bHubContrCurrent = 0; | |
415 | ||
416 | desc->bNbrPorts = ports; | |
417 | temp = 1 + (ports / 8); | |
418 | desc->bDescLength = 7 + 2 * temp; | |
419 | ||
420 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
421 | memset (&desc->bitmap [0], 0, temp); | |
422 | memset (&desc->bitmap [temp], 0xff, temp); | |
423 | ||
424 | temp = 0x0008; /* per-port overcurrent reporting */ | |
425 | if (HCS_PPC (ehci->hcs_params)) | |
426 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
427 | else |
428 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
429 | #if 0 |
430 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
431 | if (HCS_INDICATOR (ehci->hcs_params)) | |
432 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
433 | #endif | |
434 | desc->wHubCharacteristics = (__force __u16)cpu_to_le16 (temp); | |
435 | } | |
436 | ||
437 | /*-------------------------------------------------------------------------*/ | |
438 | ||
53bd6a60 | 439 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
1da177e4 LT |
440 | |
441 | static int ehci_hub_control ( | |
442 | struct usb_hcd *hcd, | |
443 | u16 typeReq, | |
444 | u16 wValue, | |
445 | u16 wIndex, | |
446 | char *buf, | |
447 | u16 wLength | |
448 | ) { | |
449 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
450 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
e6316565 | 451 | u32 __iomem *status_reg = &ehci->regs->port_status[wIndex - 1]; |
1da177e4 LT |
452 | u32 temp, status; |
453 | unsigned long flags; | |
454 | int retval = 0; | |
f0d7f273 | 455 | unsigned selector; |
1da177e4 LT |
456 | |
457 | /* | |
458 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
459 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
460 | * (track current state ourselves) ... blink for diagnostics, | |
461 | * power, "this is the one", etc. EHCI spec supports this. | |
462 | */ | |
463 | ||
464 | spin_lock_irqsave (&ehci->lock, flags); | |
465 | switch (typeReq) { | |
466 | case ClearHubFeature: | |
467 | switch (wValue) { | |
468 | case C_HUB_LOCAL_POWER: | |
469 | case C_HUB_OVER_CURRENT: | |
470 | /* no hub-wide feature/status flags */ | |
471 | break; | |
472 | default: | |
473 | goto error; | |
474 | } | |
475 | break; | |
476 | case ClearPortFeature: | |
477 | if (!wIndex || wIndex > ports) | |
478 | goto error; | |
479 | wIndex--; | |
e6316565 | 480 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
481 | |
482 | /* | |
483 | * Even if OWNER is set, so the port is owned by the | |
484 | * companion controller, khubd needs to be able to clear | |
485 | * the port-change status bits (especially | |
486 | * USB_PORT_FEAT_C_CONNECTION). | |
487 | */ | |
1da177e4 LT |
488 | |
489 | switch (wValue) { | |
490 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 491 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
492 | break; |
493 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 494 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 495 | status_reg); |
1da177e4 LT |
496 | break; |
497 | case USB_PORT_FEAT_SUSPEND: | |
498 | if (temp & PORT_RESET) | |
499 | goto error; | |
f8aeb3bb DB |
500 | if (ehci->no_selective_suspend) |
501 | break; | |
1da177e4 LT |
502 | if (temp & PORT_SUSPEND) { |
503 | if ((temp & PORT_PE) == 0) | |
504 | goto error; | |
505 | /* resume signaling for 20 msec */ | |
10f6524a | 506 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
083522d7 | 507 | ehci_writel(ehci, temp | PORT_RESUME, |
e6316565 | 508 | status_reg); |
1da177e4 LT |
509 | ehci->reset_done [wIndex] = jiffies |
510 | + msecs_to_jiffies (20); | |
511 | } | |
512 | break; | |
513 | case USB_PORT_FEAT_C_SUSPEND: | |
514 | /* we auto-clear this feature */ | |
515 | break; | |
516 | case USB_PORT_FEAT_POWER: | |
517 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
518 | ehci_writel(ehci, |
519 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 520 | status_reg); |
1da177e4 LT |
521 | break; |
522 | case USB_PORT_FEAT_C_CONNECTION: | |
083522d7 | 523 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 524 | status_reg); |
1da177e4 LT |
525 | break; |
526 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 527 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 528 | status_reg); |
1da177e4 LT |
529 | break; |
530 | case USB_PORT_FEAT_C_RESET: | |
531 | /* GetPortStatus clears reset */ | |
532 | break; | |
533 | default: | |
534 | goto error; | |
535 | } | |
083522d7 | 536 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
537 | break; |
538 | case GetHubDescriptor: | |
539 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
540 | buf); | |
541 | break; | |
542 | case GetHubStatus: | |
543 | /* no hub-wide feature/status flags */ | |
544 | memset (buf, 0, 4); | |
545 | //cpu_to_le32s ((u32 *) buf); | |
546 | break; | |
547 | case GetPortStatus: | |
548 | if (!wIndex || wIndex > ports) | |
549 | goto error; | |
550 | wIndex--; | |
551 | status = 0; | |
e6316565 | 552 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
553 | |
554 | // wPortChange bits | |
555 | if (temp & PORT_CSC) | |
556 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
557 | if (temp & PORT_PEC) | |
558 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
93f1a47c | 559 | if ((temp & PORT_OCC) && !ignore_oc) |
1da177e4 LT |
560 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; |
561 | ||
562 | /* whoever resumes must GetPortStatus to complete it!! */ | |
629e4427 AS |
563 | if (temp & PORT_RESUME) { |
564 | ||
565 | /* Remote Wakeup received? */ | |
566 | if (!ehci->reset_done[wIndex]) { | |
567 | /* resume signaling for 20 msec */ | |
568 | ehci->reset_done[wIndex] = jiffies | |
569 | + msecs_to_jiffies(20); | |
570 | /* check the port again */ | |
571 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
572 | ehci->reset_done[wIndex]); | |
573 | } | |
1da177e4 | 574 | |
629e4427 AS |
575 | /* resume completed? */ |
576 | else if (time_after_eq(jiffies, | |
577 | ehci->reset_done[wIndex])) { | |
578 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
579 | ehci->reset_done[wIndex] = 0; | |
580 | ||
581 | /* stop resume signaling */ | |
582 | temp = ehci_readl(ehci, status_reg); | |
583 | ehci_writel(ehci, | |
e6316565 AS |
584 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
585 | status_reg); | |
629e4427 | 586 | retval = handshake(ehci, status_reg, |
083522d7 | 587 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
588 | if (retval != 0) { |
589 | ehci_err(ehci, | |
590 | "port %d resume error %d\n", | |
591 | wIndex + 1, retval); | |
592 | goto error; | |
593 | } | |
594 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 595 | } |
1da177e4 LT |
596 | } |
597 | ||
598 | /* whoever resets must GetPortStatus to complete it!! */ | |
599 | if ((temp & PORT_RESET) | |
629e4427 AS |
600 | && time_after_eq(jiffies, |
601 | ehci->reset_done[wIndex])) { | |
1da177e4 LT |
602 | status |= 1 << USB_PORT_FEAT_C_RESET; |
603 | ehci->reset_done [wIndex] = 0; | |
604 | ||
605 | /* force reset to complete */ | |
083522d7 | 606 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 607 | status_reg); |
c22fa3ac DB |
608 | /* REVISIT: some hardware needs 550+ usec to clear |
609 | * this bit; seems too long to spin routinely... | |
610 | */ | |
e6316565 | 611 | retval = handshake(ehci, status_reg, |
c22fa3ac | 612 | PORT_RESET, 0, 750); |
1da177e4 LT |
613 | if (retval != 0) { |
614 | ehci_err (ehci, "port %d reset error %d\n", | |
615 | wIndex + 1, retval); | |
616 | goto error; | |
617 | } | |
618 | ||
619 | /* see what we found out */ | |
e6316565 AS |
620 | temp = check_reset_complete (ehci, wIndex, status_reg, |
621 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
622 | } |
623 | ||
57e06c11 AS |
624 | /* transfer dedicated ports to the companion hc */ |
625 | if ((temp & PORT_CONNECT) && | |
626 | test_bit(wIndex, &ehci->companion_ports)) { | |
627 | temp &= ~PORT_RWC_BITS; | |
628 | temp |= PORT_OWNER; | |
629 | ehci_writel(ehci, temp, status_reg); | |
630 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
631 | temp = ehci_readl(ehci, status_reg); | |
632 | } | |
633 | ||
625b5c9a AS |
634 | /* |
635 | * Even if OWNER is set, there's no harm letting khubd | |
636 | * see the wPortStatus values (they should all be 0 except | |
637 | * for PORT_POWER anyway). | |
638 | */ | |
639 | ||
640 | if (temp & PORT_CONNECT) { | |
641 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
642 | // status may be from integrated TT | |
643 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 644 | } |
625b5c9a AS |
645 | if (temp & PORT_PE) |
646 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
647 | if (temp & (PORT_SUSPEND|PORT_RESUME)) | |
648 | status |= 1 << USB_PORT_FEAT_SUSPEND; | |
649 | if (temp & PORT_OC) | |
650 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
651 | if (temp & PORT_RESET) | |
652 | status |= 1 << USB_PORT_FEAT_RESET; | |
653 | if (temp & PORT_POWER) | |
654 | status |= 1 << USB_PORT_FEAT_POWER; | |
1da177e4 LT |
655 | |
656 | #ifndef EHCI_VERBOSE_DEBUG | |
657 | if (status & ~0xffff) /* only if wPortChange is interesting */ | |
658 | #endif | |
659 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
64543652 | 660 | put_unaligned(cpu_to_le32 (status), (__le32 *) buf); |
1da177e4 LT |
661 | break; |
662 | case SetHubFeature: | |
663 | switch (wValue) { | |
664 | case C_HUB_LOCAL_POWER: | |
665 | case C_HUB_OVER_CURRENT: | |
666 | /* no hub-wide feature/status flags */ | |
667 | break; | |
668 | default: | |
669 | goto error; | |
670 | } | |
671 | break; | |
672 | case SetPortFeature: | |
f0d7f273 DB |
673 | selector = wIndex >> 8; |
674 | wIndex &= 0xff; | |
1da177e4 LT |
675 | if (!wIndex || wIndex > ports) |
676 | goto error; | |
677 | wIndex--; | |
e6316565 | 678 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
679 | if (temp & PORT_OWNER) |
680 | break; | |
681 | ||
10f6524a | 682 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
683 | switch (wValue) { |
684 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
685 | if (ehci->no_selective_suspend) |
686 | break; | |
1da177e4 LT |
687 | if ((temp & PORT_PE) == 0 |
688 | || (temp & PORT_RESET) != 0) | |
689 | goto error; | |
2c1c3c4c | 690 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 | 691 | temp |= PORT_WAKE_BITS; |
e6316565 | 692 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
1da177e4 LT |
693 | break; |
694 | case USB_PORT_FEAT_POWER: | |
695 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 696 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 697 | status_reg); |
1da177e4 LT |
698 | break; |
699 | case USB_PORT_FEAT_RESET: | |
700 | if (temp & PORT_RESUME) | |
701 | goto error; | |
702 | /* line status bits may report this as low speed, | |
703 | * which can be fine if this root hub has a | |
704 | * transaction translator built in. | |
705 | */ | |
706 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
707 | && !ehci_is_TDI(ehci) | |
708 | && PORT_USB11 (temp)) { | |
709 | ehci_dbg (ehci, | |
710 | "port %d low speed --> companion\n", | |
711 | wIndex + 1); | |
712 | temp |= PORT_OWNER; | |
713 | } else { | |
714 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
715 | temp |= PORT_RESET; | |
716 | temp &= ~PORT_PE; | |
717 | ||
718 | /* | |
719 | * caller must wait, then call GetPortStatus | |
720 | * usb 2.0 spec says 50 ms resets on root | |
721 | */ | |
722 | ehci->reset_done [wIndex] = jiffies | |
723 | + msecs_to_jiffies (50); | |
724 | } | |
e6316565 | 725 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 726 | break; |
f0d7f273 DB |
727 | |
728 | /* For downstream facing ports (these): one hub port is put | |
729 | * into test mode according to USB2 11.24.2.13, then the hub | |
730 | * must be reset (which for root hub now means rmmod+modprobe, | |
731 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
732 | * about the EHCI-specific stuff. | |
733 | */ | |
734 | case USB_PORT_FEAT_TEST: | |
735 | if (!selector || selector > 5) | |
736 | goto error; | |
737 | ehci_quiesce(ehci); | |
738 | ehci_halt(ehci); | |
739 | temp |= selector << 16; | |
e6316565 | 740 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
741 | break; |
742 | ||
1da177e4 LT |
743 | default: |
744 | goto error; | |
745 | } | |
083522d7 | 746 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
747 | break; |
748 | ||
749 | default: | |
750 | error: | |
751 | /* "stall" on error */ | |
752 | retval = -EPIPE; | |
753 | } | |
754 | spin_unlock_irqrestore (&ehci->lock, flags); | |
755 | return retval; | |
756 | } |