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 | ||
383975d7 AS |
31 | #ifdef CONFIG_USB_PERSIST |
32 | ||
33 | static int ehci_hub_control( | |
34 | struct usb_hcd *hcd, | |
35 | u16 typeReq, | |
36 | u16 wValue, | |
37 | u16 wIndex, | |
38 | char *buf, | |
39 | u16 wLength | |
40 | ); | |
41 | ||
42 | /* After a power loss, ports that were owned by the companion must be | |
43 | * reset so that the companion can still own them. | |
44 | */ | |
45 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
46 | { | |
47 | u32 __iomem *reg; | |
48 | u32 status; | |
49 | int port; | |
50 | __le32 buf; | |
51 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
52 | ||
53 | if (!ehci->owned_ports) | |
54 | return; | |
55 | ||
56 | /* Give the connections some time to appear */ | |
57 | msleep(20); | |
58 | ||
59 | port = HCS_N_PORTS(ehci->hcs_params); | |
60 | while (port--) { | |
61 | if (test_bit(port, &ehci->owned_ports)) { | |
62 | reg = &ehci->regs->port_status[port]; | |
63 | status = ehci_readl(ehci, reg); | |
64 | ||
65 | /* Port already owned by companion? */ | |
66 | if (status & PORT_OWNER) | |
67 | clear_bit(port, &ehci->owned_ports); | |
68 | else | |
69 | ehci_hub_control(hcd, SetPortFeature, | |
70 | USB_PORT_FEAT_RESET, port + 1, | |
71 | NULL, 0); | |
72 | } | |
73 | } | |
74 | ||
75 | if (!ehci->owned_ports) | |
76 | return; | |
77 | msleep(90); /* Wait for resets to complete */ | |
78 | ||
79 | port = HCS_N_PORTS(ehci->hcs_params); | |
80 | while (port--) { | |
81 | if (test_bit(port, &ehci->owned_ports)) { | |
82 | ehci_hub_control(hcd, GetPortStatus, | |
83 | 0, port + 1, | |
84 | (char *) &buf, sizeof(buf)); | |
85 | ||
86 | /* The companion should now own the port, | |
87 | * but if something went wrong the port must not | |
88 | * remain enabled. | |
89 | */ | |
90 | reg = &ehci->regs->port_status[port]; | |
91 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
92 | if (status & PORT_OWNER) | |
93 | ehci_writel(ehci, status | PORT_CSC, reg); | |
94 | else { | |
95 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
96 | port + 1, status); | |
97 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
98 | } | |
99 | } | |
100 | } | |
101 | ||
102 | ehci->owned_ports = 0; | |
103 | } | |
104 | ||
105 | #else /* CONFIG_USB_PERSIST */ | |
106 | ||
107 | static inline void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
108 | { } | |
109 | ||
110 | #endif | |
111 | ||
1da177e4 LT |
112 | #ifdef CONFIG_PM |
113 | ||
0c0382e3 | 114 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
115 | { |
116 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
117 | int port; | |
8c03356a | 118 | int mask; |
1da177e4 | 119 | |
8c774fe8 AS |
120 | ehci_dbg(ehci, "suspend root hub\n"); |
121 | ||
1da177e4 LT |
122 | if (time_before (jiffies, ehci->next_statechange)) |
123 | msleep(5); | |
124 | ||
125 | port = HCS_N_PORTS (ehci->hcs_params); | |
126 | spin_lock_irq (&ehci->lock); | |
127 | ||
128 | /* stop schedules, clean any completed work */ | |
129 | if (HC_IS_RUNNING(hcd->state)) { | |
130 | ehci_quiesce (ehci); | |
131 | hcd->state = HC_STATE_QUIESCING; | |
132 | } | |
083522d7 | 133 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
1da177e4 | 134 | if (ehci->reclaim) |
64f89798 | 135 | ehci->reclaim_ready = 1; |
7d12e780 | 136 | ehci_work(ehci); |
1da177e4 | 137 | |
8c03356a AS |
138 | /* Unlike other USB host controller types, EHCI doesn't have |
139 | * any notion of "global" or bus-wide suspend. The driver has | |
140 | * to manually suspend all the active unsuspended ports, and | |
141 | * then manually resume them in the bus_resume() routine. | |
142 | */ | |
143 | ehci->bus_suspended = 0; | |
383975d7 | 144 | ehci->owned_ports = 0; |
1da177e4 LT |
145 | while (port--) { |
146 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 147 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
1da177e4 LT |
148 | u32 t2 = t1; |
149 | ||
8c03356a | 150 | /* keep track of which ports we suspend */ |
383975d7 AS |
151 | if (t1 & PORT_OWNER) |
152 | set_bit(port, &ehci->owned_ports); | |
153 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 154 | t2 |= PORT_SUSPEND; |
8c03356a AS |
155 | set_bit(port, &ehci->bus_suspended); |
156 | } | |
157 | ||
158 | /* enable remote wakeup on all ports */ | |
2c1c3c4c | 159 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
160 | t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E; |
161 | else | |
162 | t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); | |
163 | ||
164 | if (t1 != t2) { | |
165 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
166 | port + 1, t1, t2); | |
083522d7 | 167 | ehci_writel(ehci, t2, reg); |
1da177e4 LT |
168 | } |
169 | } | |
170 | ||
171 | /* turn off now-idle HC */ | |
4756ae5b | 172 | del_timer_sync (&ehci->watchdog); |
1da177e4 LT |
173 | ehci_halt (ehci); |
174 | hcd->state = HC_STATE_SUSPENDED; | |
175 | ||
8c03356a AS |
176 | /* allow remote wakeup */ |
177 | mask = INTR_MASK; | |
178 | if (!device_may_wakeup(&hcd->self.root_hub->dev)) | |
179 | mask &= ~STS_PCD; | |
083522d7 BH |
180 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
181 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 182 | |
1da177e4 LT |
183 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
184 | spin_unlock_irq (&ehci->lock); | |
185 | return 0; | |
186 | } | |
187 | ||
188 | ||
189 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 190 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
191 | { |
192 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
193 | u32 temp; | |
383975d7 | 194 | u32 power_okay; |
1da177e4 | 195 | int i; |
1da177e4 LT |
196 | |
197 | if (time_before (jiffies, ehci->next_statechange)) | |
198 | msleep(5); | |
199 | spin_lock_irq (&ehci->lock); | |
200 | ||
f03c17fc DB |
201 | /* Ideally and we've got a real resume here, and no port's power |
202 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
203 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
204 | * the last user of the controller, not reset/pm hardware keeping | |
205 | * state we gave to it. | |
206 | */ | |
383975d7 AS |
207 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
208 | ehci_dbg(ehci, "resume root hub%s\n", | |
209 | power_okay ? "" : " after power loss"); | |
f03c17fc | 210 | |
8c03356a AS |
211 | /* at least some APM implementations will try to deliver |
212 | * IRQs right away, so delay them until we're ready. | |
213 | */ | |
083522d7 | 214 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
215 | |
216 | /* re-init operational registers */ | |
083522d7 BH |
217 | ehci_writel(ehci, 0, &ehci->regs->segment); |
218 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
219 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
220 | |
221 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
083522d7 | 222 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 | 223 | |
e198a314 AS |
224 | /* Some controller/firmware combinations need a delay during which |
225 | * they set up the port statuses. See Bugzilla #8190. */ | |
226 | mdelay(8); | |
227 | ||
8c03356a | 228 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
229 | i = HCS_N_PORTS (ehci->hcs_params); |
230 | while (i--) { | |
083522d7 | 231 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
10f6524a DB |
232 | temp &= ~(PORT_RWC_BITS |
233 | | PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E); | |
8c03356a AS |
234 | if (test_bit(i, &ehci->bus_suspended) && |
235 | (temp & PORT_SUSPEND)) { | |
1da177e4 LT |
236 | ehci->reset_done [i] = jiffies + msecs_to_jiffies (20); |
237 | temp |= PORT_RESUME; | |
238 | } | |
083522d7 | 239 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 LT |
240 | } |
241 | i = HCS_N_PORTS (ehci->hcs_params); | |
242 | mdelay (20); | |
243 | while (i--) { | |
083522d7 | 244 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
245 | if (test_bit(i, &ehci->bus_suspended) && |
246 | (temp & PORT_SUSPEND)) { | |
247 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 248 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
249 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
250 | } | |
1da177e4 | 251 | } |
083522d7 | 252 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
253 | |
254 | /* maybe re-activate the schedule(s) */ | |
255 | temp = 0; | |
256 | if (ehci->async->qh_next.qh) | |
257 | temp |= CMD_ASE; | |
258 | if (ehci->periodic_sched) | |
259 | temp |= CMD_PSE; | |
260 | if (temp) { | |
261 | ehci->command |= temp; | |
083522d7 | 262 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
263 | } |
264 | ||
265 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
266 | hcd->state = HC_STATE_RUNNING; | |
267 | ||
268 | /* Now we can safely re-enable irqs */ | |
083522d7 | 269 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
270 | |
271 | spin_unlock_irq (&ehci->lock); | |
383975d7 AS |
272 | |
273 | if (!power_okay) | |
274 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
275 | return 0; |
276 | } | |
277 | ||
278 | #else | |
279 | ||
0c0382e3 AS |
280 | #define ehci_bus_suspend NULL |
281 | #define ehci_bus_resume NULL | |
1da177e4 LT |
282 | |
283 | #endif /* CONFIG_PM */ | |
284 | ||
57e06c11 AS |
285 | /*-------------------------------------------------------------------------*/ |
286 | ||
287 | /* Display the ports dedicated to the companion controller */ | |
288 | static ssize_t show_companion(struct class_device *class_dev, char *buf) | |
289 | { | |
290 | struct ehci_hcd *ehci; | |
291 | int nports, index, n; | |
292 | int count = PAGE_SIZE; | |
293 | char *ptr = buf; | |
294 | ||
295 | ehci = hcd_to_ehci(bus_to_hcd(class_get_devdata(class_dev))); | |
296 | nports = HCS_N_PORTS(ehci->hcs_params); | |
297 | ||
298 | for (index = 0; index < nports; ++index) { | |
299 | if (test_bit(index, &ehci->companion_ports)) { | |
300 | n = scnprintf(ptr, count, "%d\n", index + 1); | |
301 | ptr += n; | |
302 | count -= n; | |
303 | } | |
304 | } | |
305 | return ptr - buf; | |
306 | } | |
307 | ||
308 | /* | |
309 | * Dedicate or undedicate a port to the companion controller. | |
310 | * Syntax is "[-]portnum", where a leading '-' sign means | |
311 | * return control of the port to the EHCI controller. | |
312 | */ | |
313 | static ssize_t store_companion(struct class_device *class_dev, | |
314 | const char *buf, size_t count) | |
315 | { | |
316 | struct ehci_hcd *ehci; | |
317 | int portnum, new_owner, try; | |
318 | u32 __iomem *status_reg; | |
319 | u32 port_status; | |
320 | ||
321 | ehci = hcd_to_ehci(bus_to_hcd(class_get_devdata(class_dev))); | |
322 | new_owner = PORT_OWNER; /* Owned by companion */ | |
323 | if (sscanf(buf, "%d", &portnum) != 1) | |
324 | return -EINVAL; | |
325 | if (portnum < 0) { | |
326 | portnum = - portnum; | |
327 | new_owner = 0; /* Owned by EHCI */ | |
328 | } | |
329 | if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | |
330 | return -ENOENT; | |
331 | status_reg = &ehci->regs->port_status[--portnum]; | |
332 | if (new_owner) | |
333 | set_bit(portnum, &ehci->companion_ports); | |
334 | else | |
335 | clear_bit(portnum, &ehci->companion_ports); | |
336 | ||
337 | /* | |
338 | * The controller won't set the OWNER bit if the port is | |
339 | * enabled, so this loop will sometimes require at least two | |
340 | * iterations: one to disable the port and one to set OWNER. | |
341 | */ | |
342 | ||
343 | for (try = 4; try > 0; --try) { | |
344 | spin_lock_irq(&ehci->lock); | |
345 | port_status = ehci_readl(ehci, status_reg); | |
346 | if ((port_status & PORT_OWNER) == new_owner | |
347 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
348 | == 0) | |
349 | try = 0; | |
350 | else { | |
351 | port_status ^= PORT_OWNER; | |
352 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
353 | ehci_writel(ehci, port_status, status_reg); | |
354 | } | |
355 | spin_unlock_irq(&ehci->lock); | |
356 | if (try > 1) | |
357 | msleep(5); | |
358 | } | |
359 | return count; | |
360 | } | |
361 | static CLASS_DEVICE_ATTR(companion, 0644, show_companion, store_companion); | |
362 | ||
363 | static inline void create_companion_file(struct ehci_hcd *ehci) | |
364 | { | |
365 | int i; | |
366 | ||
367 | /* with integrated TT there is no companion! */ | |
368 | if (!ehci_is_TDI(ehci)) | |
369 | i = class_device_create_file(ehci_to_hcd(ehci)->self.class_dev, | |
370 | &class_device_attr_companion); | |
371 | } | |
372 | ||
373 | static inline void remove_companion_file(struct ehci_hcd *ehci) | |
374 | { | |
375 | /* with integrated TT there is no companion! */ | |
376 | if (!ehci_is_TDI(ehci)) | |
377 | class_device_remove_file(ehci_to_hcd(ehci)->self.class_dev, | |
378 | &class_device_attr_companion); | |
379 | } | |
380 | ||
381 | ||
1da177e4 LT |
382 | /*-------------------------------------------------------------------------*/ |
383 | ||
384 | static int check_reset_complete ( | |
385 | struct ehci_hcd *ehci, | |
386 | int index, | |
e6316565 | 387 | u32 __iomem *status_reg, |
1da177e4 LT |
388 | int port_status |
389 | ) { | |
390 | if (!(port_status & PORT_CONNECT)) { | |
391 | ehci->reset_done [index] = 0; | |
392 | return port_status; | |
393 | } | |
394 | ||
395 | /* if reset finished and it's still not enabled -- handoff */ | |
396 | if (!(port_status & PORT_PE)) { | |
397 | ||
398 | /* with integrated TT, there's nobody to hand it to! */ | |
399 | if (ehci_is_TDI(ehci)) { | |
400 | ehci_dbg (ehci, | |
401 | "Failed to enable port %d on root hub TT\n", | |
402 | index+1); | |
403 | return port_status; | |
404 | } | |
405 | ||
406 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
407 | index + 1); | |
408 | ||
409 | // what happens if HCS_N_CC(params) == 0 ? | |
410 | port_status |= PORT_OWNER; | |
10f6524a | 411 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 412 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 LT |
413 | |
414 | } else | |
415 | ehci_dbg (ehci, "port %d high speed\n", index + 1); | |
416 | ||
417 | return port_status; | |
418 | } | |
419 | ||
420 | /*-------------------------------------------------------------------------*/ | |
421 | ||
422 | ||
423 | /* build "status change" packet (one or two bytes) from HC registers */ | |
424 | ||
425 | static int | |
426 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
427 | { | |
428 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
429 | u32 temp, status = 0; | |
93f1a47c | 430 | u32 mask; |
1da177e4 LT |
431 | int ports, i, retval = 1; |
432 | unsigned long flags; | |
433 | ||
434 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
435 | if (!HC_IS_RUNNING(hcd->state)) | |
436 | return 0; | |
437 | ||
438 | /* init status to no-changes */ | |
439 | buf [0] = 0; | |
440 | ports = HCS_N_PORTS (ehci->hcs_params); | |
441 | if (ports > 7) { | |
442 | buf [1] = 0; | |
443 | retval++; | |
444 | } | |
53bd6a60 | 445 | |
93f1a47c DB |
446 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
447 | * causing massive log spam unless we completely ignore them. It | |
448 | * may be relevant that VIA VT8235 controlers, where PORT_POWER is | |
449 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to | |
450 | * PORT_POWER; that's surprising, but maybe within-spec. | |
451 | */ | |
452 | if (!ignore_oc) | |
453 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
454 | else | |
455 | mask = PORT_CSC | PORT_PEC; | |
456 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
457 | ||
1da177e4 LT |
458 | /* no hub change reports (bit 0) for now (power, ...) */ |
459 | ||
460 | /* port N changes (bit N)? */ | |
461 | spin_lock_irqsave (&ehci->lock, flags); | |
462 | for (i = 0; i < ports; i++) { | |
083522d7 | 463 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
464 | |
465 | /* | |
466 | * Return status information even for ports with OWNER set. | |
467 | * Otherwise khubd wouldn't see the disconnect event when a | |
468 | * high-speed device is switched over to the companion | |
469 | * controller by the user. | |
470 | */ | |
471 | ||
1da177e4 LT |
472 | if (!(temp & PORT_CONNECT)) |
473 | ehci->reset_done [i] = 0; | |
93f1a47c | 474 | if ((temp & mask) != 0 |
1da177e4 | 475 | || ((temp & PORT_RESUME) != 0 |
629e4427 AS |
476 | && time_after_eq(jiffies, |
477 | ehci->reset_done[i]))) { | |
1da177e4 LT |
478 | if (i < 7) |
479 | buf [0] |= 1 << (i + 1); | |
480 | else | |
481 | buf [1] |= 1 << (i - 7); | |
482 | status = STS_PCD; | |
483 | } | |
484 | } | |
485 | /* FIXME autosuspend idle root hubs */ | |
486 | spin_unlock_irqrestore (&ehci->lock, flags); | |
487 | return status ? retval : 0; | |
488 | } | |
489 | ||
490 | /*-------------------------------------------------------------------------*/ | |
491 | ||
492 | static void | |
493 | ehci_hub_descriptor ( | |
494 | struct ehci_hcd *ehci, | |
495 | struct usb_hub_descriptor *desc | |
496 | ) { | |
497 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
498 | u16 temp; | |
499 | ||
500 | desc->bDescriptorType = 0x29; | |
501 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
502 | desc->bHubContrCurrent = 0; | |
503 | ||
504 | desc->bNbrPorts = ports; | |
505 | temp = 1 + (ports / 8); | |
506 | desc->bDescLength = 7 + 2 * temp; | |
507 | ||
508 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
509 | memset (&desc->bitmap [0], 0, temp); | |
510 | memset (&desc->bitmap [temp], 0xff, temp); | |
511 | ||
512 | temp = 0x0008; /* per-port overcurrent reporting */ | |
513 | if (HCS_PPC (ehci->hcs_params)) | |
514 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
515 | else |
516 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
517 | #if 0 |
518 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
519 | if (HCS_INDICATOR (ehci->hcs_params)) | |
520 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
521 | #endif | |
522 | desc->wHubCharacteristics = (__force __u16)cpu_to_le16 (temp); | |
523 | } | |
524 | ||
525 | /*-------------------------------------------------------------------------*/ | |
526 | ||
53bd6a60 | 527 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
1da177e4 LT |
528 | |
529 | static int ehci_hub_control ( | |
530 | struct usb_hcd *hcd, | |
531 | u16 typeReq, | |
532 | u16 wValue, | |
533 | u16 wIndex, | |
534 | char *buf, | |
535 | u16 wLength | |
536 | ) { | |
537 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
538 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
539 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
540 | (wIndex & 0xff) - 1]; | |
1da177e4 LT |
541 | u32 temp, status; |
542 | unsigned long flags; | |
543 | int retval = 0; | |
f0d7f273 | 544 | unsigned selector; |
1da177e4 LT |
545 | |
546 | /* | |
547 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
548 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
549 | * (track current state ourselves) ... blink for diagnostics, | |
550 | * power, "this is the one", etc. EHCI spec supports this. | |
551 | */ | |
552 | ||
553 | spin_lock_irqsave (&ehci->lock, flags); | |
554 | switch (typeReq) { | |
555 | case ClearHubFeature: | |
556 | switch (wValue) { | |
557 | case C_HUB_LOCAL_POWER: | |
558 | case C_HUB_OVER_CURRENT: | |
559 | /* no hub-wide feature/status flags */ | |
560 | break; | |
561 | default: | |
562 | goto error; | |
563 | } | |
564 | break; | |
565 | case ClearPortFeature: | |
566 | if (!wIndex || wIndex > ports) | |
567 | goto error; | |
568 | wIndex--; | |
e6316565 | 569 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
570 | |
571 | /* | |
572 | * Even if OWNER is set, so the port is owned by the | |
573 | * companion controller, khubd needs to be able to clear | |
574 | * the port-change status bits (especially | |
575 | * USB_PORT_FEAT_C_CONNECTION). | |
576 | */ | |
1da177e4 LT |
577 | |
578 | switch (wValue) { | |
579 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 580 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
581 | break; |
582 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 583 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 584 | status_reg); |
1da177e4 LT |
585 | break; |
586 | case USB_PORT_FEAT_SUSPEND: | |
587 | if (temp & PORT_RESET) | |
588 | goto error; | |
f8aeb3bb DB |
589 | if (ehci->no_selective_suspend) |
590 | break; | |
1da177e4 LT |
591 | if (temp & PORT_SUSPEND) { |
592 | if ((temp & PORT_PE) == 0) | |
593 | goto error; | |
594 | /* resume signaling for 20 msec */ | |
10f6524a | 595 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
083522d7 | 596 | ehci_writel(ehci, temp | PORT_RESUME, |
e6316565 | 597 | status_reg); |
1da177e4 LT |
598 | ehci->reset_done [wIndex] = jiffies |
599 | + msecs_to_jiffies (20); | |
600 | } | |
601 | break; | |
602 | case USB_PORT_FEAT_C_SUSPEND: | |
603 | /* we auto-clear this feature */ | |
604 | break; | |
605 | case USB_PORT_FEAT_POWER: | |
606 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
607 | ehci_writel(ehci, |
608 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 609 | status_reg); |
1da177e4 LT |
610 | break; |
611 | case USB_PORT_FEAT_C_CONNECTION: | |
083522d7 | 612 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 613 | status_reg); |
1da177e4 LT |
614 | break; |
615 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 616 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 617 | status_reg); |
1da177e4 LT |
618 | break; |
619 | case USB_PORT_FEAT_C_RESET: | |
620 | /* GetPortStatus clears reset */ | |
621 | break; | |
622 | default: | |
623 | goto error; | |
624 | } | |
083522d7 | 625 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
626 | break; |
627 | case GetHubDescriptor: | |
628 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
629 | buf); | |
630 | break; | |
631 | case GetHubStatus: | |
632 | /* no hub-wide feature/status flags */ | |
633 | memset (buf, 0, 4); | |
634 | //cpu_to_le32s ((u32 *) buf); | |
635 | break; | |
636 | case GetPortStatus: | |
637 | if (!wIndex || wIndex > ports) | |
638 | goto error; | |
639 | wIndex--; | |
640 | status = 0; | |
e6316565 | 641 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
642 | |
643 | // wPortChange bits | |
644 | if (temp & PORT_CSC) | |
645 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
646 | if (temp & PORT_PEC) | |
647 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
93f1a47c | 648 | if ((temp & PORT_OCC) && !ignore_oc) |
1da177e4 LT |
649 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; |
650 | ||
651 | /* whoever resumes must GetPortStatus to complete it!! */ | |
629e4427 AS |
652 | if (temp & PORT_RESUME) { |
653 | ||
654 | /* Remote Wakeup received? */ | |
655 | if (!ehci->reset_done[wIndex]) { | |
656 | /* resume signaling for 20 msec */ | |
657 | ehci->reset_done[wIndex] = jiffies | |
658 | + msecs_to_jiffies(20); | |
659 | /* check the port again */ | |
660 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
661 | ehci->reset_done[wIndex]); | |
662 | } | |
1da177e4 | 663 | |
629e4427 AS |
664 | /* resume completed? */ |
665 | else if (time_after_eq(jiffies, | |
666 | ehci->reset_done[wIndex])) { | |
667 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
668 | ehci->reset_done[wIndex] = 0; | |
669 | ||
670 | /* stop resume signaling */ | |
671 | temp = ehci_readl(ehci, status_reg); | |
672 | ehci_writel(ehci, | |
e6316565 AS |
673 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
674 | status_reg); | |
629e4427 | 675 | retval = handshake(ehci, status_reg, |
083522d7 | 676 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
677 | if (retval != 0) { |
678 | ehci_err(ehci, | |
679 | "port %d resume error %d\n", | |
680 | wIndex + 1, retval); | |
681 | goto error; | |
682 | } | |
683 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 684 | } |
1da177e4 LT |
685 | } |
686 | ||
687 | /* whoever resets must GetPortStatus to complete it!! */ | |
688 | if ((temp & PORT_RESET) | |
629e4427 AS |
689 | && time_after_eq(jiffies, |
690 | ehci->reset_done[wIndex])) { | |
1da177e4 LT |
691 | status |= 1 << USB_PORT_FEAT_C_RESET; |
692 | ehci->reset_done [wIndex] = 0; | |
693 | ||
694 | /* force reset to complete */ | |
083522d7 | 695 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 696 | status_reg); |
c22fa3ac DB |
697 | /* REVISIT: some hardware needs 550+ usec to clear |
698 | * this bit; seems too long to spin routinely... | |
699 | */ | |
e6316565 | 700 | retval = handshake(ehci, status_reg, |
c22fa3ac | 701 | PORT_RESET, 0, 750); |
1da177e4 LT |
702 | if (retval != 0) { |
703 | ehci_err (ehci, "port %d reset error %d\n", | |
704 | wIndex + 1, retval); | |
705 | goto error; | |
706 | } | |
707 | ||
708 | /* see what we found out */ | |
e6316565 AS |
709 | temp = check_reset_complete (ehci, wIndex, status_reg, |
710 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
711 | } |
712 | ||
57e06c11 AS |
713 | /* transfer dedicated ports to the companion hc */ |
714 | if ((temp & PORT_CONNECT) && | |
715 | test_bit(wIndex, &ehci->companion_ports)) { | |
716 | temp &= ~PORT_RWC_BITS; | |
717 | temp |= PORT_OWNER; | |
718 | ehci_writel(ehci, temp, status_reg); | |
719 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
720 | temp = ehci_readl(ehci, status_reg); | |
721 | } | |
722 | ||
625b5c9a AS |
723 | /* |
724 | * Even if OWNER is set, there's no harm letting khubd | |
725 | * see the wPortStatus values (they should all be 0 except | |
726 | * for PORT_POWER anyway). | |
727 | */ | |
728 | ||
729 | if (temp & PORT_CONNECT) { | |
730 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
731 | // status may be from integrated TT | |
732 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 733 | } |
625b5c9a AS |
734 | if (temp & PORT_PE) |
735 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
736 | if (temp & (PORT_SUSPEND|PORT_RESUME)) | |
737 | status |= 1 << USB_PORT_FEAT_SUSPEND; | |
738 | if (temp & PORT_OC) | |
739 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
740 | if (temp & PORT_RESET) | |
741 | status |= 1 << USB_PORT_FEAT_RESET; | |
742 | if (temp & PORT_POWER) | |
743 | status |= 1 << USB_PORT_FEAT_POWER; | |
1da177e4 LT |
744 | |
745 | #ifndef EHCI_VERBOSE_DEBUG | |
746 | if (status & ~0xffff) /* only if wPortChange is interesting */ | |
747 | #endif | |
748 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
64543652 | 749 | put_unaligned(cpu_to_le32 (status), (__le32 *) buf); |
1da177e4 LT |
750 | break; |
751 | case SetHubFeature: | |
752 | switch (wValue) { | |
753 | case C_HUB_LOCAL_POWER: | |
754 | case C_HUB_OVER_CURRENT: | |
755 | /* no hub-wide feature/status flags */ | |
756 | break; | |
757 | default: | |
758 | goto error; | |
759 | } | |
760 | break; | |
761 | case SetPortFeature: | |
f0d7f273 DB |
762 | selector = wIndex >> 8; |
763 | wIndex &= 0xff; | |
1da177e4 LT |
764 | if (!wIndex || wIndex > ports) |
765 | goto error; | |
766 | wIndex--; | |
e6316565 | 767 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
768 | if (temp & PORT_OWNER) |
769 | break; | |
770 | ||
10f6524a | 771 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
772 | switch (wValue) { |
773 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
774 | if (ehci->no_selective_suspend) |
775 | break; | |
1da177e4 LT |
776 | if ((temp & PORT_PE) == 0 |
777 | || (temp & PORT_RESET) != 0) | |
778 | goto error; | |
2c1c3c4c | 779 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 | 780 | temp |= PORT_WAKE_BITS; |
e6316565 | 781 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
1da177e4 LT |
782 | break; |
783 | case USB_PORT_FEAT_POWER: | |
784 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 785 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 786 | status_reg); |
1da177e4 LT |
787 | break; |
788 | case USB_PORT_FEAT_RESET: | |
789 | if (temp & PORT_RESUME) | |
790 | goto error; | |
791 | /* line status bits may report this as low speed, | |
792 | * which can be fine if this root hub has a | |
793 | * transaction translator built in. | |
794 | */ | |
795 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
796 | && !ehci_is_TDI(ehci) | |
797 | && PORT_USB11 (temp)) { | |
798 | ehci_dbg (ehci, | |
799 | "port %d low speed --> companion\n", | |
800 | wIndex + 1); | |
801 | temp |= PORT_OWNER; | |
802 | } else { | |
803 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
804 | temp |= PORT_RESET; | |
805 | temp &= ~PORT_PE; | |
806 | ||
807 | /* | |
808 | * caller must wait, then call GetPortStatus | |
809 | * usb 2.0 spec says 50 ms resets on root | |
810 | */ | |
811 | ehci->reset_done [wIndex] = jiffies | |
812 | + msecs_to_jiffies (50); | |
813 | } | |
e6316565 | 814 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 815 | break; |
f0d7f273 DB |
816 | |
817 | /* For downstream facing ports (these): one hub port is put | |
818 | * into test mode according to USB2 11.24.2.13, then the hub | |
819 | * must be reset (which for root hub now means rmmod+modprobe, | |
820 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
821 | * about the EHCI-specific stuff. | |
822 | */ | |
823 | case USB_PORT_FEAT_TEST: | |
824 | if (!selector || selector > 5) | |
825 | goto error; | |
826 | ehci_quiesce(ehci); | |
827 | ehci_halt(ehci); | |
828 | temp |= selector << 16; | |
e6316565 | 829 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
830 | break; |
831 | ||
1da177e4 LT |
832 | default: |
833 | goto error; | |
834 | } | |
083522d7 | 835 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
836 | break; |
837 | ||
838 | default: | |
839 | error: | |
840 | /* "stall" on error */ | |
841 | retval = -EPIPE; | |
842 | } | |
843 | spin_unlock_irqrestore (&ehci->lock, flags); | |
844 | return retval; | |
845 | } |