Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
d49d4317 | 2 | * Copyright (C) 2001-2004 by David Brownell |
53bd6a60 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* this file is part of ehci-hcd.c */ | |
20 | ||
21 | /*-------------------------------------------------------------------------*/ | |
22 | ||
23 | /* | |
24 | * EHCI Root Hub ... the nonsharable stuff | |
25 | * | |
26 | * Registers don't need cpu_to_le32, that happens transparently | |
27 | */ | |
28 | ||
29 | /*-------------------------------------------------------------------------*/ | |
30 | ||
58a97ffe AS |
31 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
32 | ||
aff6d18f AS |
33 | #ifdef CONFIG_PM |
34 | ||
383975d7 AS |
35 | static int ehci_hub_control( |
36 | struct usb_hcd *hcd, | |
37 | u16 typeReq, | |
38 | u16 wValue, | |
39 | u16 wIndex, | |
40 | char *buf, | |
41 | u16 wLength | |
42 | ); | |
43 | ||
44 | /* After a power loss, ports that were owned by the companion must be | |
45 | * reset so that the companion can still own them. | |
46 | */ | |
47 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
48 | { | |
49 | u32 __iomem *reg; | |
50 | u32 status; | |
51 | int port; | |
52 | __le32 buf; | |
53 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
54 | ||
55 | if (!ehci->owned_ports) | |
56 | return; | |
57 | ||
58 | /* Give the connections some time to appear */ | |
59 | msleep(20); | |
60 | ||
61 | port = HCS_N_PORTS(ehci->hcs_params); | |
62 | while (port--) { | |
63 | if (test_bit(port, &ehci->owned_ports)) { | |
64 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 65 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
66 | |
67 | /* Port already owned by companion? */ | |
68 | if (status & PORT_OWNER) | |
69 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
70 | else if (test_bit(port, &ehci->companion_ports)) |
71 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
383975d7 AS |
72 | else |
73 | ehci_hub_control(hcd, SetPortFeature, | |
74 | USB_PORT_FEAT_RESET, port + 1, | |
75 | NULL, 0); | |
76 | } | |
77 | } | |
78 | ||
79 | if (!ehci->owned_ports) | |
80 | return; | |
81 | msleep(90); /* Wait for resets to complete */ | |
82 | ||
83 | port = HCS_N_PORTS(ehci->hcs_params); | |
84 | while (port--) { | |
85 | if (test_bit(port, &ehci->owned_ports)) { | |
86 | ehci_hub_control(hcd, GetPortStatus, | |
87 | 0, port + 1, | |
88 | (char *) &buf, sizeof(buf)); | |
89 | ||
90 | /* The companion should now own the port, | |
91 | * but if something went wrong the port must not | |
92 | * remain enabled. | |
93 | */ | |
94 | reg = &ehci->regs->port_status[port]; | |
95 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
96 | if (status & PORT_OWNER) | |
97 | ehci_writel(ehci, status | PORT_CSC, reg); | |
98 | else { | |
99 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
100 | port + 1, status); | |
101 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
102 | } | |
103 | } | |
104 | } | |
105 | ||
106 | ehci->owned_ports = 0; | |
107 | } | |
108 | ||
0c0382e3 | 109 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
110 | { |
111 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
112 | int port; | |
8c03356a | 113 | int mask; |
1da177e4 | 114 | |
8c774fe8 AS |
115 | ehci_dbg(ehci, "suspend root hub\n"); |
116 | ||
1da177e4 LT |
117 | if (time_before (jiffies, ehci->next_statechange)) |
118 | msleep(5); | |
f8fa7571 AS |
119 | del_timer_sync(&ehci->watchdog); |
120 | del_timer_sync(&ehci->iaa_watchdog); | |
1da177e4 LT |
121 | |
122 | port = HCS_N_PORTS (ehci->hcs_params); | |
123 | spin_lock_irq (&ehci->lock); | |
124 | ||
125 | /* stop schedules, clean any completed work */ | |
126 | if (HC_IS_RUNNING(hcd->state)) { | |
127 | ehci_quiesce (ehci); | |
128 | hcd->state = HC_STATE_QUIESCING; | |
129 | } | |
083522d7 | 130 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
7d12e780 | 131 | ehci_work(ehci); |
1da177e4 | 132 | |
8c03356a AS |
133 | /* Unlike other USB host controller types, EHCI doesn't have |
134 | * any notion of "global" or bus-wide suspend. The driver has | |
135 | * to manually suspend all the active unsuspended ports, and | |
136 | * then manually resume them in the bus_resume() routine. | |
137 | */ | |
138 | ehci->bus_suspended = 0; | |
383975d7 | 139 | ehci->owned_ports = 0; |
1da177e4 LT |
140 | while (port--) { |
141 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 142 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
1da177e4 LT |
143 | u32 t2 = t1; |
144 | ||
8c03356a | 145 | /* keep track of which ports we suspend */ |
383975d7 AS |
146 | if (t1 & PORT_OWNER) |
147 | set_bit(port, &ehci->owned_ports); | |
148 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 149 | t2 |= PORT_SUSPEND; |
8c03356a AS |
150 | set_bit(port, &ehci->bus_suspended); |
151 | } | |
152 | ||
153 | /* enable remote wakeup on all ports */ | |
58a97ffe AS |
154 | if (hcd->self.root_hub->do_remote_wakeup) |
155 | t2 |= PORT_WAKE_BITS; | |
1da177e4 | 156 | else |
58a97ffe | 157 | t2 &= ~PORT_WAKE_BITS; |
1da177e4 LT |
158 | |
159 | if (t1 != t2) { | |
160 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
161 | port + 1, t1, t2); | |
083522d7 | 162 | ehci_writel(ehci, t2, reg); |
1da177e4 LT |
163 | } |
164 | } | |
165 | ||
cd930c93 AS |
166 | /* Apparently some devices need a >= 1-uframe delay here */ |
167 | if (ehci->bus_suspended) | |
168 | udelay(150); | |
169 | ||
1da177e4 LT |
170 | /* turn off now-idle HC */ |
171 | ehci_halt (ehci); | |
172 | hcd->state = HC_STATE_SUSPENDED; | |
173 | ||
cdc647a9 DB |
174 | if (ehci->reclaim) |
175 | end_unlink_async(ehci); | |
176 | ||
8c03356a AS |
177 | /* allow remote wakeup */ |
178 | mask = INTR_MASK; | |
58a97ffe | 179 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 180 | mask &= ~STS_PCD; |
083522d7 BH |
181 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
182 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 183 | |
1da177e4 LT |
184 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
185 | spin_unlock_irq (&ehci->lock); | |
186 | return 0; | |
187 | } | |
188 | ||
189 | ||
190 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 191 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
192 | { |
193 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
194 | u32 temp; | |
383975d7 | 195 | u32 power_okay; |
1da177e4 | 196 | int i; |
3a4e72cb | 197 | u8 resume_needed = 0; |
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. */ | |
3a4e72cb VP |
232 | spin_unlock_irq(&ehci->lock); |
233 | msleep(8); | |
234 | spin_lock_irq(&ehci->lock); | |
e198a314 | 235 | |
8c03356a | 236 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
237 | i = HCS_N_PORTS (ehci->hcs_params); |
238 | while (i--) { | |
083522d7 | 239 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 240 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 241 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 242 | (temp & PORT_SUSPEND)) { |
1da177e4 | 243 | temp |= PORT_RESUME; |
3a4e72cb VP |
244 | resume_needed = 1; |
245 | } | |
083522d7 | 246 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 247 | } |
3a4e72cb VP |
248 | |
249 | /* msleep for 20ms only if code is trying to resume port */ | |
250 | if (resume_needed) { | |
251 | spin_unlock_irq(&ehci->lock); | |
252 | msleep(20); | |
253 | spin_lock_irq(&ehci->lock); | |
254 | } | |
255 | ||
1da177e4 | 256 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 257 | while (i--) { |
083522d7 | 258 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
259 | if (test_bit(i, &ehci->bus_suspended) && |
260 | (temp & PORT_SUSPEND)) { | |
261 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 262 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
263 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
264 | } | |
1da177e4 | 265 | } |
083522d7 | 266 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
267 | |
268 | /* maybe re-activate the schedule(s) */ | |
269 | temp = 0; | |
270 | if (ehci->async->qh_next.qh) | |
271 | temp |= CMD_ASE; | |
272 | if (ehci->periodic_sched) | |
273 | temp |= CMD_PSE; | |
274 | if (temp) { | |
275 | ehci->command |= temp; | |
083522d7 | 276 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
277 | } |
278 | ||
279 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
280 | hcd->state = HC_STATE_RUNNING; | |
281 | ||
282 | /* Now we can safely re-enable irqs */ | |
083522d7 | 283 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
284 | |
285 | spin_unlock_irq (&ehci->lock); | |
3bb1af52 | 286 | ehci_handover_companion_ports(ehci); |
1da177e4 LT |
287 | return 0; |
288 | } | |
289 | ||
290 | #else | |
291 | ||
0c0382e3 AS |
292 | #define ehci_bus_suspend NULL |
293 | #define ehci_bus_resume NULL | |
1da177e4 LT |
294 | |
295 | #endif /* CONFIG_PM */ | |
296 | ||
57e06c11 AS |
297 | /*-------------------------------------------------------------------------*/ |
298 | ||
299 | /* Display the ports dedicated to the companion controller */ | |
5a3201b2 TJ |
300 | static ssize_t show_companion(struct device *dev, |
301 | struct device_attribute *attr, | |
302 | char *buf) | |
57e06c11 AS |
303 | { |
304 | struct ehci_hcd *ehci; | |
305 | int nports, index, n; | |
306 | int count = PAGE_SIZE; | |
307 | char *ptr = buf; | |
308 | ||
5a3201b2 | 309 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); |
57e06c11 AS |
310 | nports = HCS_N_PORTS(ehci->hcs_params); |
311 | ||
312 | for (index = 0; index < nports; ++index) { | |
313 | if (test_bit(index, &ehci->companion_ports)) { | |
314 | n = scnprintf(ptr, count, "%d\n", index + 1); | |
315 | ptr += n; | |
316 | count -= n; | |
317 | } | |
318 | } | |
319 | return ptr - buf; | |
320 | } | |
321 | ||
322 | /* | |
90da096e | 323 | * Sets the owner of a port |
57e06c11 | 324 | */ |
90da096e | 325 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 326 | { |
57e06c11 AS |
327 | u32 __iomem *status_reg; |
328 | u32 port_status; | |
90da096e | 329 | int try; |
57e06c11 | 330 | |
90da096e | 331 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
332 | |
333 | /* | |
334 | * The controller won't set the OWNER bit if the port is | |
335 | * enabled, so this loop will sometimes require at least two | |
336 | * iterations: one to disable the port and one to set OWNER. | |
337 | */ | |
57e06c11 AS |
338 | for (try = 4; try > 0; --try) { |
339 | spin_lock_irq(&ehci->lock); | |
340 | port_status = ehci_readl(ehci, status_reg); | |
341 | if ((port_status & PORT_OWNER) == new_owner | |
342 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
343 | == 0) | |
344 | try = 0; | |
345 | else { | |
346 | port_status ^= PORT_OWNER; | |
347 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
348 | ehci_writel(ehci, port_status, status_reg); | |
349 | } | |
350 | spin_unlock_irq(&ehci->lock); | |
351 | if (try > 1) | |
352 | msleep(5); | |
353 | } | |
90da096e BR |
354 | } |
355 | ||
356 | /* | |
357 | * Dedicate or undedicate a port to the companion controller. | |
358 | * Syntax is "[-]portnum", where a leading '-' sign means | |
359 | * return control of the port to the EHCI controller. | |
360 | */ | |
361 | static ssize_t store_companion(struct device *dev, | |
362 | struct device_attribute *attr, | |
363 | const char *buf, size_t count) | |
364 | { | |
365 | struct ehci_hcd *ehci; | |
366 | int portnum, new_owner; | |
367 | ||
368 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); | |
369 | new_owner = PORT_OWNER; /* Owned by companion */ | |
370 | if (sscanf(buf, "%d", &portnum) != 1) | |
371 | return -EINVAL; | |
372 | if (portnum < 0) { | |
373 | portnum = - portnum; | |
374 | new_owner = 0; /* Owned by EHCI */ | |
375 | } | |
376 | if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | |
377 | return -ENOENT; | |
378 | portnum--; | |
379 | if (new_owner) | |
380 | set_bit(portnum, &ehci->companion_ports); | |
381 | else | |
382 | clear_bit(portnum, &ehci->companion_ports); | |
383 | set_owner(ehci, portnum, new_owner); | |
57e06c11 AS |
384 | return count; |
385 | } | |
5a3201b2 | 386 | static DEVICE_ATTR(companion, 0644, show_companion, store_companion); |
57e06c11 AS |
387 | |
388 | static inline void create_companion_file(struct ehci_hcd *ehci) | |
389 | { | |
390 | int i; | |
391 | ||
392 | /* with integrated TT there is no companion! */ | |
393 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 394 | i = device_create_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 395 | &dev_attr_companion); |
57e06c11 AS |
396 | } |
397 | ||
398 | static inline void remove_companion_file(struct ehci_hcd *ehci) | |
399 | { | |
400 | /* with integrated TT there is no companion! */ | |
401 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 402 | device_remove_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 403 | &dev_attr_companion); |
57e06c11 AS |
404 | } |
405 | ||
406 | ||
1da177e4 LT |
407 | /*-------------------------------------------------------------------------*/ |
408 | ||
409 | static int check_reset_complete ( | |
410 | struct ehci_hcd *ehci, | |
411 | int index, | |
e6316565 | 412 | u32 __iomem *status_reg, |
1da177e4 LT |
413 | int port_status |
414 | ) { | |
cd4cdc93 | 415 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 416 | return port_status; |
1da177e4 LT |
417 | |
418 | /* if reset finished and it's still not enabled -- handoff */ | |
419 | if (!(port_status & PORT_PE)) { | |
420 | ||
421 | /* with integrated TT, there's nobody to hand it to! */ | |
422 | if (ehci_is_TDI(ehci)) { | |
423 | ehci_dbg (ehci, | |
424 | "Failed to enable port %d on root hub TT\n", | |
425 | index+1); | |
426 | return port_status; | |
427 | } | |
428 | ||
429 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
430 | index + 1); | |
431 | ||
432 | // what happens if HCS_N_CC(params) == 0 ? | |
433 | port_status |= PORT_OWNER; | |
10f6524a | 434 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 435 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 436 | |
796bcae7 VB |
437 | /* ensure 440EPX ohci controller state is operational */ |
438 | if (ehci->has_amcc_usb23) | |
439 | set_ohci_hcfs(ehci, 1); | |
440 | } else { | |
1da177e4 | 441 | ehci_dbg (ehci, "port %d high speed\n", index + 1); |
796bcae7 VB |
442 | /* ensure 440EPx ohci controller state is suspended */ |
443 | if (ehci->has_amcc_usb23) | |
444 | set_ohci_hcfs(ehci, 0); | |
445 | } | |
1da177e4 LT |
446 | |
447 | return port_status; | |
448 | } | |
449 | ||
450 | /*-------------------------------------------------------------------------*/ | |
451 | ||
452 | ||
453 | /* build "status change" packet (one or two bytes) from HC registers */ | |
454 | ||
455 | static int | |
456 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
457 | { | |
458 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
459 | u32 temp, status = 0; | |
93f1a47c | 460 | u32 mask; |
1da177e4 LT |
461 | int ports, i, retval = 1; |
462 | unsigned long flags; | |
463 | ||
464 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
465 | if (!HC_IS_RUNNING(hcd->state)) | |
466 | return 0; | |
467 | ||
468 | /* init status to no-changes */ | |
469 | buf [0] = 0; | |
470 | ports = HCS_N_PORTS (ehci->hcs_params); | |
471 | if (ports > 7) { | |
472 | buf [1] = 0; | |
473 | retval++; | |
474 | } | |
53bd6a60 | 475 | |
93f1a47c DB |
476 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
477 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 478 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
479 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
480 | * PORT_POWER; that's surprising, but maybe within-spec. | |
481 | */ | |
482 | if (!ignore_oc) | |
483 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
484 | else | |
485 | mask = PORT_CSC | PORT_PEC; | |
486 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
487 | ||
1da177e4 LT |
488 | /* no hub change reports (bit 0) for now (power, ...) */ |
489 | ||
490 | /* port N changes (bit N)? */ | |
491 | spin_lock_irqsave (&ehci->lock, flags); | |
492 | for (i = 0; i < ports; i++) { | |
083522d7 | 493 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
494 | |
495 | /* | |
496 | * Return status information even for ports with OWNER set. | |
497 | * Otherwise khubd wouldn't see the disconnect event when a | |
498 | * high-speed device is switched over to the companion | |
499 | * controller by the user. | |
500 | */ | |
501 | ||
eafe5b99 AS |
502 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
503 | || (ehci->reset_done[i] && time_after_eq( | |
504 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
505 | if (i < 7) |
506 | buf [0] |= 1 << (i + 1); | |
507 | else | |
508 | buf [1] |= 1 << (i - 7); | |
509 | status = STS_PCD; | |
510 | } | |
511 | } | |
512 | /* FIXME autosuspend idle root hubs */ | |
513 | spin_unlock_irqrestore (&ehci->lock, flags); | |
514 | return status ? retval : 0; | |
515 | } | |
516 | ||
517 | /*-------------------------------------------------------------------------*/ | |
518 | ||
519 | static void | |
520 | ehci_hub_descriptor ( | |
521 | struct ehci_hcd *ehci, | |
522 | struct usb_hub_descriptor *desc | |
523 | ) { | |
524 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
525 | u16 temp; | |
526 | ||
527 | desc->bDescriptorType = 0x29; | |
528 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
529 | desc->bHubContrCurrent = 0; | |
530 | ||
531 | desc->bNbrPorts = ports; | |
532 | temp = 1 + (ports / 8); | |
533 | desc->bDescLength = 7 + 2 * temp; | |
534 | ||
535 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
536 | memset (&desc->bitmap [0], 0, temp); | |
537 | memset (&desc->bitmap [temp], 0xff, temp); | |
538 | ||
539 | temp = 0x0008; /* per-port overcurrent reporting */ | |
540 | if (HCS_PPC (ehci->hcs_params)) | |
541 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
542 | else |
543 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
544 | #if 0 |
545 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
546 | if (HCS_INDICATOR (ehci->hcs_params)) | |
547 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
548 | #endif | |
fd05e720 | 549 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
550 | } |
551 | ||
552 | /*-------------------------------------------------------------------------*/ | |
553 | ||
1da177e4 LT |
554 | static int ehci_hub_control ( |
555 | struct usb_hcd *hcd, | |
556 | u16 typeReq, | |
557 | u16 wValue, | |
558 | u16 wIndex, | |
559 | char *buf, | |
560 | u16 wLength | |
561 | ) { | |
562 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
563 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
564 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
565 | (wIndex & 0xff) - 1]; | |
1da177e4 LT |
566 | u32 temp, status; |
567 | unsigned long flags; | |
568 | int retval = 0; | |
f0d7f273 | 569 | unsigned selector; |
1da177e4 LT |
570 | |
571 | /* | |
572 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
573 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
574 | * (track current state ourselves) ... blink for diagnostics, | |
575 | * power, "this is the one", etc. EHCI spec supports this. | |
576 | */ | |
577 | ||
578 | spin_lock_irqsave (&ehci->lock, flags); | |
579 | switch (typeReq) { | |
580 | case ClearHubFeature: | |
581 | switch (wValue) { | |
582 | case C_HUB_LOCAL_POWER: | |
583 | case C_HUB_OVER_CURRENT: | |
584 | /* no hub-wide feature/status flags */ | |
585 | break; | |
586 | default: | |
587 | goto error; | |
588 | } | |
589 | break; | |
590 | case ClearPortFeature: | |
591 | if (!wIndex || wIndex > ports) | |
592 | goto error; | |
593 | wIndex--; | |
e6316565 | 594 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
595 | |
596 | /* | |
597 | * Even if OWNER is set, so the port is owned by the | |
598 | * companion controller, khubd needs to be able to clear | |
599 | * the port-change status bits (especially | |
600 | * USB_PORT_FEAT_C_CONNECTION). | |
601 | */ | |
1da177e4 LT |
602 | |
603 | switch (wValue) { | |
604 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 605 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
606 | break; |
607 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 608 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 609 | status_reg); |
1da177e4 LT |
610 | break; |
611 | case USB_PORT_FEAT_SUSPEND: | |
612 | if (temp & PORT_RESET) | |
613 | goto error; | |
f8aeb3bb DB |
614 | if (ehci->no_selective_suspend) |
615 | break; | |
1da177e4 LT |
616 | if (temp & PORT_SUSPEND) { |
617 | if ((temp & PORT_PE) == 0) | |
618 | goto error; | |
619 | /* resume signaling for 20 msec */ | |
10f6524a | 620 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
083522d7 | 621 | ehci_writel(ehci, temp | PORT_RESUME, |
e6316565 | 622 | status_reg); |
1da177e4 LT |
623 | ehci->reset_done [wIndex] = jiffies |
624 | + msecs_to_jiffies (20); | |
625 | } | |
626 | break; | |
627 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 628 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
629 | break; |
630 | case USB_PORT_FEAT_POWER: | |
631 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
632 | ehci_writel(ehci, |
633 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 634 | status_reg); |
1da177e4 LT |
635 | break; |
636 | case USB_PORT_FEAT_C_CONNECTION: | |
083522d7 | 637 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 638 | status_reg); |
1da177e4 LT |
639 | break; |
640 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 641 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 642 | status_reg); |
1da177e4 LT |
643 | break; |
644 | case USB_PORT_FEAT_C_RESET: | |
645 | /* GetPortStatus clears reset */ | |
646 | break; | |
647 | default: | |
648 | goto error; | |
649 | } | |
083522d7 | 650 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
651 | break; |
652 | case GetHubDescriptor: | |
653 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
654 | buf); | |
655 | break; | |
656 | case GetHubStatus: | |
657 | /* no hub-wide feature/status flags */ | |
658 | memset (buf, 0, 4); | |
659 | //cpu_to_le32s ((u32 *) buf); | |
660 | break; | |
661 | case GetPortStatus: | |
662 | if (!wIndex || wIndex > ports) | |
663 | goto error; | |
664 | wIndex--; | |
665 | status = 0; | |
e6316565 | 666 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
667 | |
668 | // wPortChange bits | |
669 | if (temp & PORT_CSC) | |
670 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
671 | if (temp & PORT_PEC) | |
672 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
756aa6b3 CE |
673 | |
674 | if ((temp & PORT_OCC) && !ignore_oc){ | |
1da177e4 LT |
675 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; |
676 | ||
756aa6b3 CE |
677 | /* |
678 | * Hubs should disable port power on over-current. | |
679 | * However, not all EHCI implementations do this | |
680 | * automatically, even if they _do_ support per-port | |
681 | * power switching; they're allowed to just limit the | |
682 | * current. khubd will turn the power back on. | |
683 | */ | |
684 | if (HCS_PPC (ehci->hcs_params)){ | |
685 | ehci_writel(ehci, | |
686 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
687 | status_reg); | |
688 | } | |
689 | } | |
690 | ||
1da177e4 | 691 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
692 | if (temp & PORT_RESUME) { |
693 | ||
694 | /* Remote Wakeup received? */ | |
695 | if (!ehci->reset_done[wIndex]) { | |
696 | /* resume signaling for 20 msec */ | |
697 | ehci->reset_done[wIndex] = jiffies | |
698 | + msecs_to_jiffies(20); | |
699 | /* check the port again */ | |
700 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
701 | ehci->reset_done[wIndex]); | |
702 | } | |
1da177e4 | 703 | |
629e4427 AS |
704 | /* resume completed? */ |
705 | else if (time_after_eq(jiffies, | |
706 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 707 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 708 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 AS |
709 | ehci->reset_done[wIndex] = 0; |
710 | ||
711 | /* stop resume signaling */ | |
712 | temp = ehci_readl(ehci, status_reg); | |
713 | ehci_writel(ehci, | |
e6316565 AS |
714 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
715 | status_reg); | |
629e4427 | 716 | retval = handshake(ehci, status_reg, |
083522d7 | 717 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
718 | if (retval != 0) { |
719 | ehci_err(ehci, | |
720 | "port %d resume error %d\n", | |
721 | wIndex + 1, retval); | |
722 | goto error; | |
723 | } | |
724 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 725 | } |
1da177e4 LT |
726 | } |
727 | ||
728 | /* whoever resets must GetPortStatus to complete it!! */ | |
729 | if ((temp & PORT_RESET) | |
629e4427 AS |
730 | && time_after_eq(jiffies, |
731 | ehci->reset_done[wIndex])) { | |
1da177e4 LT |
732 | status |= 1 << USB_PORT_FEAT_C_RESET; |
733 | ehci->reset_done [wIndex] = 0; | |
734 | ||
735 | /* force reset to complete */ | |
083522d7 | 736 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 737 | status_reg); |
c22fa3ac DB |
738 | /* REVISIT: some hardware needs 550+ usec to clear |
739 | * this bit; seems too long to spin routinely... | |
740 | */ | |
e6316565 | 741 | retval = handshake(ehci, status_reg, |
c22fa3ac | 742 | PORT_RESET, 0, 750); |
1da177e4 LT |
743 | if (retval != 0) { |
744 | ehci_err (ehci, "port %d reset error %d\n", | |
745 | wIndex + 1, retval); | |
746 | goto error; | |
747 | } | |
748 | ||
749 | /* see what we found out */ | |
e6316565 AS |
750 | temp = check_reset_complete (ehci, wIndex, status_reg, |
751 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
752 | } |
753 | ||
eafe5b99 AS |
754 | if (!(temp & (PORT_RESUME|PORT_RESET))) |
755 | ehci->reset_done[wIndex] = 0; | |
756 | ||
57e06c11 AS |
757 | /* transfer dedicated ports to the companion hc */ |
758 | if ((temp & PORT_CONNECT) && | |
759 | test_bit(wIndex, &ehci->companion_ports)) { | |
760 | temp &= ~PORT_RWC_BITS; | |
761 | temp |= PORT_OWNER; | |
762 | ehci_writel(ehci, temp, status_reg); | |
763 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
764 | temp = ehci_readl(ehci, status_reg); | |
765 | } | |
766 | ||
625b5c9a AS |
767 | /* |
768 | * Even if OWNER is set, there's no harm letting khubd | |
769 | * see the wPortStatus values (they should all be 0 except | |
770 | * for PORT_POWER anyway). | |
771 | */ | |
772 | ||
773 | if (temp & PORT_CONNECT) { | |
774 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
775 | // status may be from integrated TT | |
776 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 777 | } |
625b5c9a AS |
778 | if (temp & PORT_PE) |
779 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
eafe5b99 AS |
780 | |
781 | /* maybe the port was unsuspended without our knowledge */ | |
782 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
625b5c9a | 783 | status |= 1 << USB_PORT_FEAT_SUSPEND; |
eafe5b99 AS |
784 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
785 | clear_bit(wIndex, &ehci->suspended_ports); | |
786 | ehci->reset_done[wIndex] = 0; | |
787 | if (temp & PORT_PE) | |
788 | set_bit(wIndex, &ehci->port_c_suspend); | |
789 | } | |
790 | ||
625b5c9a AS |
791 | if (temp & PORT_OC) |
792 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
793 | if (temp & PORT_RESET) | |
794 | status |= 1 << USB_PORT_FEAT_RESET; | |
795 | if (temp & PORT_POWER) | |
796 | status |= 1 << USB_PORT_FEAT_POWER; | |
d1f114d1 AS |
797 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
798 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
1da177e4 | 799 | |
9776afc8 | 800 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
801 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
802 | #endif | |
803 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 804 | put_unaligned_le32(status, buf); |
1da177e4 LT |
805 | break; |
806 | case SetHubFeature: | |
807 | switch (wValue) { | |
808 | case C_HUB_LOCAL_POWER: | |
809 | case C_HUB_OVER_CURRENT: | |
810 | /* no hub-wide feature/status flags */ | |
811 | break; | |
812 | default: | |
813 | goto error; | |
814 | } | |
815 | break; | |
816 | case SetPortFeature: | |
f0d7f273 DB |
817 | selector = wIndex >> 8; |
818 | wIndex &= 0xff; | |
1da177e4 LT |
819 | if (!wIndex || wIndex > ports) |
820 | goto error; | |
821 | wIndex--; | |
e6316565 | 822 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
823 | if (temp & PORT_OWNER) |
824 | break; | |
825 | ||
10f6524a | 826 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
827 | switch (wValue) { |
828 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
829 | if (ehci->no_selective_suspend) |
830 | break; | |
1da177e4 LT |
831 | if ((temp & PORT_PE) == 0 |
832 | || (temp & PORT_RESET) != 0) | |
833 | goto error; | |
e6316565 | 834 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
eafe5b99 | 835 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
836 | break; |
837 | case USB_PORT_FEAT_POWER: | |
838 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 839 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 840 | status_reg); |
1da177e4 LT |
841 | break; |
842 | case USB_PORT_FEAT_RESET: | |
843 | if (temp & PORT_RESUME) | |
844 | goto error; | |
845 | /* line status bits may report this as low speed, | |
846 | * which can be fine if this root hub has a | |
847 | * transaction translator built in. | |
848 | */ | |
849 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
850 | && !ehci_is_TDI(ehci) | |
851 | && PORT_USB11 (temp)) { | |
852 | ehci_dbg (ehci, | |
853 | "port %d low speed --> companion\n", | |
854 | wIndex + 1); | |
855 | temp |= PORT_OWNER; | |
856 | } else { | |
857 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
858 | temp |= PORT_RESET; | |
859 | temp &= ~PORT_PE; | |
860 | ||
861 | /* | |
862 | * caller must wait, then call GetPortStatus | |
863 | * usb 2.0 spec says 50 ms resets on root | |
864 | */ | |
865 | ehci->reset_done [wIndex] = jiffies | |
866 | + msecs_to_jiffies (50); | |
867 | } | |
e6316565 | 868 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 869 | break; |
f0d7f273 DB |
870 | |
871 | /* For downstream facing ports (these): one hub port is put | |
872 | * into test mode according to USB2 11.24.2.13, then the hub | |
873 | * must be reset (which for root hub now means rmmod+modprobe, | |
874 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
875 | * about the EHCI-specific stuff. | |
876 | */ | |
877 | case USB_PORT_FEAT_TEST: | |
878 | if (!selector || selector > 5) | |
879 | goto error; | |
880 | ehci_quiesce(ehci); | |
881 | ehci_halt(ehci); | |
882 | temp |= selector << 16; | |
e6316565 | 883 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
884 | break; |
885 | ||
1da177e4 LT |
886 | default: |
887 | goto error; | |
888 | } | |
083522d7 | 889 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
890 | break; |
891 | ||
892 | default: | |
893 | error: | |
894 | /* "stall" on error */ | |
895 | retval = -EPIPE; | |
896 | } | |
897 | spin_unlock_irqrestore (&ehci->lock, flags); | |
898 | return retval; | |
899 | } | |
90da096e BR |
900 | |
901 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) | |
902 | { | |
903 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
904 | ||
905 | if (ehci_is_TDI(ehci)) | |
906 | return; | |
907 | set_owner(ehci, --portnum, PORT_OWNER); | |
908 | } | |
909 | ||
3a31155c AS |
910 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
911 | { | |
912 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
913 | u32 __iomem *reg; | |
914 | ||
915 | if (ehci_is_TDI(ehci)) | |
916 | return 0; | |
917 | reg = &ehci->regs->port_status[portnum - 1]; | |
918 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
919 | } |