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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 | ||
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]; | |
3c519b84 | 63 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
64 | |
65 | /* Port already owned by companion? */ | |
66 | if (status & PORT_OWNER) | |
67 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
68 | else if (test_bit(port, &ehci->companion_ports)) |
69 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
383975d7 AS |
70 | else |
71 | ehci_hub_control(hcd, SetPortFeature, | |
72 | USB_PORT_FEAT_RESET, port + 1, | |
73 | NULL, 0); | |
74 | } | |
75 | } | |
76 | ||
77 | if (!ehci->owned_ports) | |
78 | return; | |
79 | msleep(90); /* Wait for resets to complete */ | |
80 | ||
81 | port = HCS_N_PORTS(ehci->hcs_params); | |
82 | while (port--) { | |
83 | if (test_bit(port, &ehci->owned_ports)) { | |
84 | ehci_hub_control(hcd, GetPortStatus, | |
85 | 0, port + 1, | |
86 | (char *) &buf, sizeof(buf)); | |
87 | ||
88 | /* The companion should now own the port, | |
89 | * but if something went wrong the port must not | |
90 | * remain enabled. | |
91 | */ | |
92 | reg = &ehci->regs->port_status[port]; | |
93 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
94 | if (status & PORT_OWNER) | |
95 | ehci_writel(ehci, status | PORT_CSC, reg); | |
96 | else { | |
97 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
98 | port + 1, status); | |
99 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
100 | } | |
101 | } | |
102 | } | |
103 | ||
104 | ehci->owned_ports = 0; | |
105 | } | |
106 | ||
107 | #else /* CONFIG_USB_PERSIST */ | |
108 | ||
109 | static inline void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
110 | { } | |
111 | ||
112 | #endif | |
113 | ||
1da177e4 LT |
114 | #ifdef CONFIG_PM |
115 | ||
0c0382e3 | 116 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
117 | { |
118 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
119 | int port; | |
8c03356a | 120 | int mask; |
1da177e4 | 121 | |
8c774fe8 AS |
122 | ehci_dbg(ehci, "suspend root hub\n"); |
123 | ||
1da177e4 LT |
124 | if (time_before (jiffies, ehci->next_statechange)) |
125 | msleep(5); | |
126 | ||
127 | port = HCS_N_PORTS (ehci->hcs_params); | |
128 | spin_lock_irq (&ehci->lock); | |
129 | ||
130 | /* stop schedules, clean any completed work */ | |
131 | if (HC_IS_RUNNING(hcd->state)) { | |
132 | ehci_quiesce (ehci); | |
133 | hcd->state = HC_STATE_QUIESCING; | |
134 | } | |
083522d7 | 135 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
1da177e4 | 136 | if (ehci->reclaim) |
64f89798 | 137 | ehci->reclaim_ready = 1; |
7d12e780 | 138 | ehci_work(ehci); |
1da177e4 | 139 | |
8c03356a AS |
140 | /* Unlike other USB host controller types, EHCI doesn't have |
141 | * any notion of "global" or bus-wide suspend. The driver has | |
142 | * to manually suspend all the active unsuspended ports, and | |
143 | * then manually resume them in the bus_resume() routine. | |
144 | */ | |
145 | ehci->bus_suspended = 0; | |
383975d7 | 146 | ehci->owned_ports = 0; |
1da177e4 LT |
147 | while (port--) { |
148 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 149 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
1da177e4 LT |
150 | u32 t2 = t1; |
151 | ||
8c03356a | 152 | /* keep track of which ports we suspend */ |
383975d7 AS |
153 | if (t1 & PORT_OWNER) |
154 | set_bit(port, &ehci->owned_ports); | |
155 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 156 | t2 |= PORT_SUSPEND; |
8c03356a AS |
157 | set_bit(port, &ehci->bus_suspended); |
158 | } | |
159 | ||
160 | /* enable remote wakeup on all ports */ | |
2c1c3c4c | 161 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
162 | t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E; |
163 | else | |
164 | t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); | |
165 | ||
166 | if (t1 != t2) { | |
167 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
168 | port + 1, t1, t2); | |
083522d7 | 169 | ehci_writel(ehci, t2, reg); |
1da177e4 LT |
170 | } |
171 | } | |
172 | ||
173 | /* turn off now-idle HC */ | |
4756ae5b | 174 | del_timer_sync (&ehci->watchdog); |
1da177e4 LT |
175 | ehci_halt (ehci); |
176 | hcd->state = HC_STATE_SUSPENDED; | |
177 | ||
8c03356a AS |
178 | /* allow remote wakeup */ |
179 | mask = INTR_MASK; | |
180 | if (!device_may_wakeup(&hcd->self.root_hub->dev)) | |
181 | mask &= ~STS_PCD; | |
083522d7 BH |
182 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
183 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 184 | |
1da177e4 LT |
185 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
186 | spin_unlock_irq (&ehci->lock); | |
187 | return 0; | |
188 | } | |
189 | ||
190 | ||
191 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 192 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
193 | { |
194 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
195 | u32 temp; | |
383975d7 | 196 | u32 power_okay; |
1da177e4 | 197 | int i; |
1da177e4 LT |
198 | |
199 | if (time_before (jiffies, ehci->next_statechange)) | |
200 | msleep(5); | |
201 | spin_lock_irq (&ehci->lock); | |
cfa59dab AS |
202 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
203 | spin_unlock_irq(&ehci->lock); | |
204 | return -ESHUTDOWN; | |
205 | } | |
1da177e4 | 206 | |
f03c17fc DB |
207 | /* Ideally and we've got a real resume here, and no port's power |
208 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
209 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
210 | * the last user of the controller, not reset/pm hardware keeping | |
211 | * state we gave to it. | |
212 | */ | |
383975d7 AS |
213 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
214 | ehci_dbg(ehci, "resume root hub%s\n", | |
215 | power_okay ? "" : " after power loss"); | |
f03c17fc | 216 | |
8c03356a AS |
217 | /* at least some APM implementations will try to deliver |
218 | * IRQs right away, so delay them until we're ready. | |
219 | */ | |
083522d7 | 220 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
221 | |
222 | /* re-init operational registers */ | |
083522d7 BH |
223 | ehci_writel(ehci, 0, &ehci->regs->segment); |
224 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
225 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
226 | |
227 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
083522d7 | 228 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 | 229 | |
e198a314 AS |
230 | /* Some controller/firmware combinations need a delay during which |
231 | * they set up the port statuses. See Bugzilla #8190. */ | |
232 | mdelay(8); | |
233 | ||
8c03356a | 234 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
235 | i = HCS_N_PORTS (ehci->hcs_params); |
236 | while (i--) { | |
083522d7 | 237 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
10f6524a DB |
238 | temp &= ~(PORT_RWC_BITS |
239 | | PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E); | |
8c03356a AS |
240 | if (test_bit(i, &ehci->bus_suspended) && |
241 | (temp & PORT_SUSPEND)) { | |
1da177e4 LT |
242 | ehci->reset_done [i] = jiffies + msecs_to_jiffies (20); |
243 | temp |= PORT_RESUME; | |
244 | } | |
083522d7 | 245 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 LT |
246 | } |
247 | i = HCS_N_PORTS (ehci->hcs_params); | |
248 | mdelay (20); | |
249 | while (i--) { | |
083522d7 | 250 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
251 | if (test_bit(i, &ehci->bus_suspended) && |
252 | (temp & PORT_SUSPEND)) { | |
253 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 254 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
255 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
256 | } | |
1da177e4 | 257 | } |
083522d7 | 258 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
259 | |
260 | /* maybe re-activate the schedule(s) */ | |
261 | temp = 0; | |
262 | if (ehci->async->qh_next.qh) | |
263 | temp |= CMD_ASE; | |
264 | if (ehci->periodic_sched) | |
265 | temp |= CMD_PSE; | |
266 | if (temp) { | |
267 | ehci->command |= temp; | |
083522d7 | 268 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
269 | } |
270 | ||
271 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
272 | hcd->state = HC_STATE_RUNNING; | |
273 | ||
274 | /* Now we can safely re-enable irqs */ | |
083522d7 | 275 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
276 | |
277 | spin_unlock_irq (&ehci->lock); | |
383975d7 AS |
278 | |
279 | if (!power_okay) | |
280 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
281 | return 0; |
282 | } | |
283 | ||
284 | #else | |
285 | ||
0c0382e3 AS |
286 | #define ehci_bus_suspend NULL |
287 | #define ehci_bus_resume NULL | |
1da177e4 LT |
288 | |
289 | #endif /* CONFIG_PM */ | |
290 | ||
57e06c11 AS |
291 | /*-------------------------------------------------------------------------*/ |
292 | ||
293 | /* Display the ports dedicated to the companion controller */ | |
294 | static ssize_t show_companion(struct class_device *class_dev, char *buf) | |
295 | { | |
296 | struct ehci_hcd *ehci; | |
297 | int nports, index, n; | |
298 | int count = PAGE_SIZE; | |
299 | char *ptr = buf; | |
300 | ||
301 | ehci = hcd_to_ehci(bus_to_hcd(class_get_devdata(class_dev))); | |
302 | nports = HCS_N_PORTS(ehci->hcs_params); | |
303 | ||
304 | for (index = 0; index < nports; ++index) { | |
305 | if (test_bit(index, &ehci->companion_ports)) { | |
306 | n = scnprintf(ptr, count, "%d\n", index + 1); | |
307 | ptr += n; | |
308 | count -= n; | |
309 | } | |
310 | } | |
311 | return ptr - buf; | |
312 | } | |
313 | ||
314 | /* | |
315 | * Dedicate or undedicate a port to the companion controller. | |
316 | * Syntax is "[-]portnum", where a leading '-' sign means | |
317 | * return control of the port to the EHCI controller. | |
318 | */ | |
319 | static ssize_t store_companion(struct class_device *class_dev, | |
320 | const char *buf, size_t count) | |
321 | { | |
322 | struct ehci_hcd *ehci; | |
323 | int portnum, new_owner, try; | |
324 | u32 __iomem *status_reg; | |
325 | u32 port_status; | |
326 | ||
327 | ehci = hcd_to_ehci(bus_to_hcd(class_get_devdata(class_dev))); | |
328 | new_owner = PORT_OWNER; /* Owned by companion */ | |
329 | if (sscanf(buf, "%d", &portnum) != 1) | |
330 | return -EINVAL; | |
331 | if (portnum < 0) { | |
332 | portnum = - portnum; | |
333 | new_owner = 0; /* Owned by EHCI */ | |
334 | } | |
335 | if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | |
336 | return -ENOENT; | |
337 | status_reg = &ehci->regs->port_status[--portnum]; | |
338 | if (new_owner) | |
339 | set_bit(portnum, &ehci->companion_ports); | |
340 | else | |
341 | clear_bit(portnum, &ehci->companion_ports); | |
342 | ||
343 | /* | |
344 | * The controller won't set the OWNER bit if the port is | |
345 | * enabled, so this loop will sometimes require at least two | |
346 | * iterations: one to disable the port and one to set OWNER. | |
347 | */ | |
348 | ||
349 | for (try = 4; try > 0; --try) { | |
350 | spin_lock_irq(&ehci->lock); | |
351 | port_status = ehci_readl(ehci, status_reg); | |
352 | if ((port_status & PORT_OWNER) == new_owner | |
353 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
354 | == 0) | |
355 | try = 0; | |
356 | else { | |
357 | port_status ^= PORT_OWNER; | |
358 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
359 | ehci_writel(ehci, port_status, status_reg); | |
360 | } | |
361 | spin_unlock_irq(&ehci->lock); | |
362 | if (try > 1) | |
363 | msleep(5); | |
364 | } | |
365 | return count; | |
366 | } | |
367 | static CLASS_DEVICE_ATTR(companion, 0644, show_companion, store_companion); | |
368 | ||
369 | static inline void create_companion_file(struct ehci_hcd *ehci) | |
370 | { | |
371 | int i; | |
372 | ||
373 | /* with integrated TT there is no companion! */ | |
374 | if (!ehci_is_TDI(ehci)) | |
375 | i = class_device_create_file(ehci_to_hcd(ehci)->self.class_dev, | |
376 | &class_device_attr_companion); | |
377 | } | |
378 | ||
379 | static inline void remove_companion_file(struct ehci_hcd *ehci) | |
380 | { | |
381 | /* with integrated TT there is no companion! */ | |
382 | if (!ehci_is_TDI(ehci)) | |
383 | class_device_remove_file(ehci_to_hcd(ehci)->self.class_dev, | |
384 | &class_device_attr_companion); | |
385 | } | |
386 | ||
387 | ||
1da177e4 LT |
388 | /*-------------------------------------------------------------------------*/ |
389 | ||
390 | static int check_reset_complete ( | |
391 | struct ehci_hcd *ehci, | |
392 | int index, | |
e6316565 | 393 | u32 __iomem *status_reg, |
1da177e4 LT |
394 | int port_status |
395 | ) { | |
396 | if (!(port_status & PORT_CONNECT)) { | |
397 | ehci->reset_done [index] = 0; | |
398 | return port_status; | |
399 | } | |
400 | ||
401 | /* if reset finished and it's still not enabled -- handoff */ | |
402 | if (!(port_status & PORT_PE)) { | |
403 | ||
404 | /* with integrated TT, there's nobody to hand it to! */ | |
405 | if (ehci_is_TDI(ehci)) { | |
406 | ehci_dbg (ehci, | |
407 | "Failed to enable port %d on root hub TT\n", | |
408 | index+1); | |
409 | return port_status; | |
410 | } | |
411 | ||
412 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
413 | index + 1); | |
414 | ||
415 | // what happens if HCS_N_CC(params) == 0 ? | |
416 | port_status |= PORT_OWNER; | |
10f6524a | 417 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 418 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 LT |
419 | |
420 | } else | |
421 | ehci_dbg (ehci, "port %d high speed\n", index + 1); | |
422 | ||
423 | return port_status; | |
424 | } | |
425 | ||
426 | /*-------------------------------------------------------------------------*/ | |
427 | ||
428 | ||
429 | /* build "status change" packet (one or two bytes) from HC registers */ | |
430 | ||
431 | static int | |
432 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
433 | { | |
434 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
435 | u32 temp, status = 0; | |
93f1a47c | 436 | u32 mask; |
1da177e4 LT |
437 | int ports, i, retval = 1; |
438 | unsigned long flags; | |
439 | ||
440 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
441 | if (!HC_IS_RUNNING(hcd->state)) | |
442 | return 0; | |
443 | ||
444 | /* init status to no-changes */ | |
445 | buf [0] = 0; | |
446 | ports = HCS_N_PORTS (ehci->hcs_params); | |
447 | if (ports > 7) { | |
448 | buf [1] = 0; | |
449 | retval++; | |
450 | } | |
53bd6a60 | 451 | |
93f1a47c DB |
452 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
453 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 454 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
455 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
456 | * PORT_POWER; that's surprising, but maybe within-spec. | |
457 | */ | |
458 | if (!ignore_oc) | |
459 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
460 | else | |
461 | mask = PORT_CSC | PORT_PEC; | |
462 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
463 | ||
1da177e4 LT |
464 | /* no hub change reports (bit 0) for now (power, ...) */ |
465 | ||
466 | /* port N changes (bit N)? */ | |
467 | spin_lock_irqsave (&ehci->lock, flags); | |
468 | for (i = 0; i < ports; i++) { | |
083522d7 | 469 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
470 | |
471 | /* | |
472 | * Return status information even for ports with OWNER set. | |
473 | * Otherwise khubd wouldn't see the disconnect event when a | |
474 | * high-speed device is switched over to the companion | |
475 | * controller by the user. | |
476 | */ | |
477 | ||
1da177e4 LT |
478 | if (!(temp & PORT_CONNECT)) |
479 | ehci->reset_done [i] = 0; | |
93f1a47c | 480 | if ((temp & mask) != 0 |
1da177e4 | 481 | || ((temp & PORT_RESUME) != 0 |
629e4427 AS |
482 | && time_after_eq(jiffies, |
483 | ehci->reset_done[i]))) { | |
1da177e4 LT |
484 | if (i < 7) |
485 | buf [0] |= 1 << (i + 1); | |
486 | else | |
487 | buf [1] |= 1 << (i - 7); | |
488 | status = STS_PCD; | |
489 | } | |
490 | } | |
491 | /* FIXME autosuspend idle root hubs */ | |
492 | spin_unlock_irqrestore (&ehci->lock, flags); | |
493 | return status ? retval : 0; | |
494 | } | |
495 | ||
496 | /*-------------------------------------------------------------------------*/ | |
497 | ||
498 | static void | |
499 | ehci_hub_descriptor ( | |
500 | struct ehci_hcd *ehci, | |
501 | struct usb_hub_descriptor *desc | |
502 | ) { | |
503 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
504 | u16 temp; | |
505 | ||
506 | desc->bDescriptorType = 0x29; | |
507 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
508 | desc->bHubContrCurrent = 0; | |
509 | ||
510 | desc->bNbrPorts = ports; | |
511 | temp = 1 + (ports / 8); | |
512 | desc->bDescLength = 7 + 2 * temp; | |
513 | ||
514 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
515 | memset (&desc->bitmap [0], 0, temp); | |
516 | memset (&desc->bitmap [temp], 0xff, temp); | |
517 | ||
518 | temp = 0x0008; /* per-port overcurrent reporting */ | |
519 | if (HCS_PPC (ehci->hcs_params)) | |
520 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
521 | else |
522 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
523 | #if 0 |
524 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
525 | if (HCS_INDICATOR (ehci->hcs_params)) | |
526 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
527 | #endif | |
528 | desc->wHubCharacteristics = (__force __u16)cpu_to_le16 (temp); | |
529 | } | |
530 | ||
531 | /*-------------------------------------------------------------------------*/ | |
532 | ||
53bd6a60 | 533 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
1da177e4 LT |
534 | |
535 | static int ehci_hub_control ( | |
536 | struct usb_hcd *hcd, | |
537 | u16 typeReq, | |
538 | u16 wValue, | |
539 | u16 wIndex, | |
540 | char *buf, | |
541 | u16 wLength | |
542 | ) { | |
543 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
544 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
545 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
546 | (wIndex & 0xff) - 1]; | |
1da177e4 LT |
547 | u32 temp, status; |
548 | unsigned long flags; | |
549 | int retval = 0; | |
f0d7f273 | 550 | unsigned selector; |
1da177e4 LT |
551 | |
552 | /* | |
553 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
554 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
555 | * (track current state ourselves) ... blink for diagnostics, | |
556 | * power, "this is the one", etc. EHCI spec supports this. | |
557 | */ | |
558 | ||
559 | spin_lock_irqsave (&ehci->lock, flags); | |
560 | switch (typeReq) { | |
561 | case ClearHubFeature: | |
562 | switch (wValue) { | |
563 | case C_HUB_LOCAL_POWER: | |
564 | case C_HUB_OVER_CURRENT: | |
565 | /* no hub-wide feature/status flags */ | |
566 | break; | |
567 | default: | |
568 | goto error; | |
569 | } | |
570 | break; | |
571 | case ClearPortFeature: | |
572 | if (!wIndex || wIndex > ports) | |
573 | goto error; | |
574 | wIndex--; | |
e6316565 | 575 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
576 | |
577 | /* | |
578 | * Even if OWNER is set, so the port is owned by the | |
579 | * companion controller, khubd needs to be able to clear | |
580 | * the port-change status bits (especially | |
581 | * USB_PORT_FEAT_C_CONNECTION). | |
582 | */ | |
1da177e4 LT |
583 | |
584 | switch (wValue) { | |
585 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 586 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
587 | break; |
588 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 589 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 590 | status_reg); |
1da177e4 LT |
591 | break; |
592 | case USB_PORT_FEAT_SUSPEND: | |
593 | if (temp & PORT_RESET) | |
594 | goto error; | |
f8aeb3bb DB |
595 | if (ehci->no_selective_suspend) |
596 | break; | |
1da177e4 LT |
597 | if (temp & PORT_SUSPEND) { |
598 | if ((temp & PORT_PE) == 0) | |
599 | goto error; | |
600 | /* resume signaling for 20 msec */ | |
10f6524a | 601 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
083522d7 | 602 | ehci_writel(ehci, temp | PORT_RESUME, |
e6316565 | 603 | status_reg); |
1da177e4 LT |
604 | ehci->reset_done [wIndex] = jiffies |
605 | + msecs_to_jiffies (20); | |
606 | } | |
607 | break; | |
608 | case USB_PORT_FEAT_C_SUSPEND: | |
609 | /* we auto-clear this feature */ | |
610 | break; | |
611 | case USB_PORT_FEAT_POWER: | |
612 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
613 | ehci_writel(ehci, |
614 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 615 | status_reg); |
1da177e4 LT |
616 | break; |
617 | case USB_PORT_FEAT_C_CONNECTION: | |
083522d7 | 618 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 619 | status_reg); |
1da177e4 LT |
620 | break; |
621 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 622 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 623 | status_reg); |
1da177e4 LT |
624 | break; |
625 | case USB_PORT_FEAT_C_RESET: | |
626 | /* GetPortStatus clears reset */ | |
627 | break; | |
628 | default: | |
629 | goto error; | |
630 | } | |
083522d7 | 631 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
632 | break; |
633 | case GetHubDescriptor: | |
634 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
635 | buf); | |
636 | break; | |
637 | case GetHubStatus: | |
638 | /* no hub-wide feature/status flags */ | |
639 | memset (buf, 0, 4); | |
640 | //cpu_to_le32s ((u32 *) buf); | |
641 | break; | |
642 | case GetPortStatus: | |
643 | if (!wIndex || wIndex > ports) | |
644 | goto error; | |
645 | wIndex--; | |
646 | status = 0; | |
e6316565 | 647 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
648 | |
649 | // wPortChange bits | |
650 | if (temp & PORT_CSC) | |
651 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
652 | if (temp & PORT_PEC) | |
653 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
756aa6b3 CE |
654 | |
655 | if ((temp & PORT_OCC) && !ignore_oc){ | |
1da177e4 LT |
656 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; |
657 | ||
756aa6b3 CE |
658 | /* |
659 | * Hubs should disable port power on over-current. | |
660 | * However, not all EHCI implementations do this | |
661 | * automatically, even if they _do_ support per-port | |
662 | * power switching; they're allowed to just limit the | |
663 | * current. khubd will turn the power back on. | |
664 | */ | |
665 | if (HCS_PPC (ehci->hcs_params)){ | |
666 | ehci_writel(ehci, | |
667 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
668 | status_reg); | |
669 | } | |
670 | } | |
671 | ||
1da177e4 | 672 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
673 | if (temp & PORT_RESUME) { |
674 | ||
675 | /* Remote Wakeup received? */ | |
676 | if (!ehci->reset_done[wIndex]) { | |
677 | /* resume signaling for 20 msec */ | |
678 | ehci->reset_done[wIndex] = jiffies | |
679 | + msecs_to_jiffies(20); | |
680 | /* check the port again */ | |
681 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
682 | ehci->reset_done[wIndex]); | |
683 | } | |
1da177e4 | 684 | |
629e4427 AS |
685 | /* resume completed? */ |
686 | else if (time_after_eq(jiffies, | |
687 | ehci->reset_done[wIndex])) { | |
688 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
689 | ehci->reset_done[wIndex] = 0; | |
690 | ||
691 | /* stop resume signaling */ | |
692 | temp = ehci_readl(ehci, status_reg); | |
693 | ehci_writel(ehci, | |
e6316565 AS |
694 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
695 | status_reg); | |
629e4427 | 696 | retval = handshake(ehci, status_reg, |
083522d7 | 697 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
698 | if (retval != 0) { |
699 | ehci_err(ehci, | |
700 | "port %d resume error %d\n", | |
701 | wIndex + 1, retval); | |
702 | goto error; | |
703 | } | |
704 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 705 | } |
1da177e4 LT |
706 | } |
707 | ||
708 | /* whoever resets must GetPortStatus to complete it!! */ | |
709 | if ((temp & PORT_RESET) | |
629e4427 AS |
710 | && time_after_eq(jiffies, |
711 | ehci->reset_done[wIndex])) { | |
1da177e4 LT |
712 | status |= 1 << USB_PORT_FEAT_C_RESET; |
713 | ehci->reset_done [wIndex] = 0; | |
714 | ||
715 | /* force reset to complete */ | |
083522d7 | 716 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 717 | status_reg); |
c22fa3ac DB |
718 | /* REVISIT: some hardware needs 550+ usec to clear |
719 | * this bit; seems too long to spin routinely... | |
720 | */ | |
e6316565 | 721 | retval = handshake(ehci, status_reg, |
c22fa3ac | 722 | PORT_RESET, 0, 750); |
1da177e4 LT |
723 | if (retval != 0) { |
724 | ehci_err (ehci, "port %d reset error %d\n", | |
725 | wIndex + 1, retval); | |
726 | goto error; | |
727 | } | |
728 | ||
729 | /* see what we found out */ | |
e6316565 AS |
730 | temp = check_reset_complete (ehci, wIndex, status_reg, |
731 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
732 | } |
733 | ||
57e06c11 AS |
734 | /* transfer dedicated ports to the companion hc */ |
735 | if ((temp & PORT_CONNECT) && | |
736 | test_bit(wIndex, &ehci->companion_ports)) { | |
737 | temp &= ~PORT_RWC_BITS; | |
738 | temp |= PORT_OWNER; | |
739 | ehci_writel(ehci, temp, status_reg); | |
740 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
741 | temp = ehci_readl(ehci, status_reg); | |
742 | } | |
743 | ||
625b5c9a AS |
744 | /* |
745 | * Even if OWNER is set, there's no harm letting khubd | |
746 | * see the wPortStatus values (they should all be 0 except | |
747 | * for PORT_POWER anyway). | |
748 | */ | |
749 | ||
750 | if (temp & PORT_CONNECT) { | |
751 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
752 | // status may be from integrated TT | |
753 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 754 | } |
625b5c9a AS |
755 | if (temp & PORT_PE) |
756 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
757 | if (temp & (PORT_SUSPEND|PORT_RESUME)) | |
758 | status |= 1 << USB_PORT_FEAT_SUSPEND; | |
759 | if (temp & PORT_OC) | |
760 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
761 | if (temp & PORT_RESET) | |
762 | status |= 1 << USB_PORT_FEAT_RESET; | |
763 | if (temp & PORT_POWER) | |
764 | status |= 1 << USB_PORT_FEAT_POWER; | |
1da177e4 LT |
765 | |
766 | #ifndef EHCI_VERBOSE_DEBUG | |
767 | if (status & ~0xffff) /* only if wPortChange is interesting */ | |
768 | #endif | |
769 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
64543652 | 770 | put_unaligned(cpu_to_le32 (status), (__le32 *) buf); |
1da177e4 LT |
771 | break; |
772 | case SetHubFeature: | |
773 | switch (wValue) { | |
774 | case C_HUB_LOCAL_POWER: | |
775 | case C_HUB_OVER_CURRENT: | |
776 | /* no hub-wide feature/status flags */ | |
777 | break; | |
778 | default: | |
779 | goto error; | |
780 | } | |
781 | break; | |
782 | case SetPortFeature: | |
f0d7f273 DB |
783 | selector = wIndex >> 8; |
784 | wIndex &= 0xff; | |
1da177e4 LT |
785 | if (!wIndex || wIndex > ports) |
786 | goto error; | |
787 | wIndex--; | |
e6316565 | 788 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
789 | if (temp & PORT_OWNER) |
790 | break; | |
791 | ||
10f6524a | 792 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
793 | switch (wValue) { |
794 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
795 | if (ehci->no_selective_suspend) |
796 | break; | |
1da177e4 LT |
797 | if ((temp & PORT_PE) == 0 |
798 | || (temp & PORT_RESET) != 0) | |
799 | goto error; | |
2c1c3c4c | 800 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 | 801 | temp |= PORT_WAKE_BITS; |
e6316565 | 802 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
1da177e4 LT |
803 | break; |
804 | case USB_PORT_FEAT_POWER: | |
805 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 806 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 807 | status_reg); |
1da177e4 LT |
808 | break; |
809 | case USB_PORT_FEAT_RESET: | |
810 | if (temp & PORT_RESUME) | |
811 | goto error; | |
812 | /* line status bits may report this as low speed, | |
813 | * which can be fine if this root hub has a | |
814 | * transaction translator built in. | |
815 | */ | |
816 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
817 | && !ehci_is_TDI(ehci) | |
818 | && PORT_USB11 (temp)) { | |
819 | ehci_dbg (ehci, | |
820 | "port %d low speed --> companion\n", | |
821 | wIndex + 1); | |
822 | temp |= PORT_OWNER; | |
823 | } else { | |
824 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
825 | temp |= PORT_RESET; | |
826 | temp &= ~PORT_PE; | |
827 | ||
828 | /* | |
829 | * caller must wait, then call GetPortStatus | |
830 | * usb 2.0 spec says 50 ms resets on root | |
831 | */ | |
832 | ehci->reset_done [wIndex] = jiffies | |
833 | + msecs_to_jiffies (50); | |
834 | } | |
e6316565 | 835 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 836 | break; |
f0d7f273 DB |
837 | |
838 | /* For downstream facing ports (these): one hub port is put | |
839 | * into test mode according to USB2 11.24.2.13, then the hub | |
840 | * must be reset (which for root hub now means rmmod+modprobe, | |
841 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
842 | * about the EHCI-specific stuff. | |
843 | */ | |
844 | case USB_PORT_FEAT_TEST: | |
845 | if (!selector || selector > 5) | |
846 | goto error; | |
847 | ehci_quiesce(ehci); | |
848 | ehci_halt(ehci); | |
849 | temp |= selector << 16; | |
e6316565 | 850 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
851 | break; |
852 | ||
1da177e4 LT |
853 | default: |
854 | goto error; | |
855 | } | |
083522d7 | 856 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
857 | break; |
858 | ||
859 | default: | |
860 | error: | |
861 | /* "stall" on error */ | |
862 | retval = -EPIPE; | |
863 | } | |
864 | spin_unlock_irqrestore (&ehci->lock, flags); | |
865 | return retval; | |
866 | } |