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Commit | Line | Data |
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1da177e4 | 1 | /* |
d49d4317 | 2 | * Copyright (C) 2001-2004 by David Brownell |
53bd6a60 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* this file is part of ehci-hcd.c */ | |
20 | ||
21 | /*-------------------------------------------------------------------------*/ | |
22 | ||
23 | /* | |
24 | * EHCI Root Hub ... the nonsharable stuff | |
25 | * | |
26 | * Registers don't need cpu_to_le32, that happens transparently | |
27 | */ | |
28 | ||
29 | /*-------------------------------------------------------------------------*/ | |
30 | ||
58a97ffe AS |
31 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
32 | ||
aff6d18f AS |
33 | #ifdef CONFIG_PM |
34 | ||
383975d7 AS |
35 | static int ehci_hub_control( |
36 | struct usb_hcd *hcd, | |
37 | u16 typeReq, | |
38 | u16 wValue, | |
39 | u16 wIndex, | |
40 | char *buf, | |
41 | u16 wLength | |
42 | ); | |
43 | ||
44 | /* After a power loss, ports that were owned by the companion must be | |
45 | * reset so that the companion can still own them. | |
46 | */ | |
47 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
48 | { | |
49 | u32 __iomem *reg; | |
50 | u32 status; | |
51 | int port; | |
52 | __le32 buf; | |
53 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
54 | ||
55 | if (!ehci->owned_ports) | |
56 | return; | |
57 | ||
58 | /* Give the connections some time to appear */ | |
59 | msleep(20); | |
60 | ||
61 | port = HCS_N_PORTS(ehci->hcs_params); | |
62 | while (port--) { | |
63 | if (test_bit(port, &ehci->owned_ports)) { | |
64 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 65 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
66 | |
67 | /* Port already owned by companion? */ | |
68 | if (status & PORT_OWNER) | |
69 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
70 | else if (test_bit(port, &ehci->companion_ports)) |
71 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
383975d7 AS |
72 | else |
73 | ehci_hub_control(hcd, SetPortFeature, | |
74 | USB_PORT_FEAT_RESET, port + 1, | |
75 | NULL, 0); | |
76 | } | |
77 | } | |
78 | ||
79 | if (!ehci->owned_ports) | |
80 | return; | |
81 | msleep(90); /* Wait for resets to complete */ | |
82 | ||
83 | port = HCS_N_PORTS(ehci->hcs_params); | |
84 | while (port--) { | |
85 | if (test_bit(port, &ehci->owned_ports)) { | |
86 | ehci_hub_control(hcd, GetPortStatus, | |
87 | 0, port + 1, | |
88 | (char *) &buf, sizeof(buf)); | |
89 | ||
90 | /* The companion should now own the port, | |
91 | * but if something went wrong the port must not | |
92 | * remain enabled. | |
93 | */ | |
94 | reg = &ehci->regs->port_status[port]; | |
95 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
96 | if (status & PORT_OWNER) | |
97 | ehci_writel(ehci, status | PORT_CSC, reg); | |
98 | else { | |
99 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
100 | port + 1, status); | |
101 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
102 | } | |
103 | } | |
104 | } | |
105 | ||
106 | ehci->owned_ports = 0; | |
107 | } | |
108 | ||
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; |
331ac6b2 | 114 | u32 __iomem *hostpc_reg = NULL; |
1da177e4 | 115 | |
8c774fe8 AS |
116 | ehci_dbg(ehci, "suspend root hub\n"); |
117 | ||
1da177e4 LT |
118 | if (time_before (jiffies, ehci->next_statechange)) |
119 | msleep(5); | |
f8fa7571 AS |
120 | del_timer_sync(&ehci->watchdog); |
121 | del_timer_sync(&ehci->iaa_watchdog); | |
1da177e4 LT |
122 | |
123 | port = HCS_N_PORTS (ehci->hcs_params); | |
124 | spin_lock_irq (&ehci->lock); | |
125 | ||
126 | /* stop schedules, clean any completed work */ | |
127 | if (HC_IS_RUNNING(hcd->state)) { | |
128 | ehci_quiesce (ehci); | |
129 | hcd->state = HC_STATE_QUIESCING; | |
130 | } | |
083522d7 | 131 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
7d12e780 | 132 | ehci_work(ehci); |
1da177e4 | 133 | |
8c03356a AS |
134 | /* Unlike other USB host controller types, EHCI doesn't have |
135 | * any notion of "global" or bus-wide suspend. The driver has | |
136 | * to manually suspend all the active unsuspended ports, and | |
137 | * then manually resume them in the bus_resume() routine. | |
138 | */ | |
139 | ehci->bus_suspended = 0; | |
383975d7 | 140 | ehci->owned_ports = 0; |
1da177e4 LT |
141 | while (port--) { |
142 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 143 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
1da177e4 LT |
144 | u32 t2 = t1; |
145 | ||
331ac6b2 AD |
146 | if (ehci->has_hostpc) |
147 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs | |
148 | + HOSTPC0 + 4 * (port & 0xff)); | |
8c03356a | 149 | /* keep track of which ports we suspend */ |
383975d7 AS |
150 | if (t1 & PORT_OWNER) |
151 | set_bit(port, &ehci->owned_ports); | |
152 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 153 | t2 |= PORT_SUSPEND; |
8c03356a AS |
154 | set_bit(port, &ehci->bus_suspended); |
155 | } | |
156 | ||
157 | /* enable remote wakeup on all ports */ | |
331ac6b2 AD |
158 | if (hcd->self.root_hub->do_remote_wakeup) { |
159 | /* only enable appropriate wake bits, otherwise the | |
160 | * hardware can not go phy low power mode. If a race | |
161 | * condition happens here(connection change during bits | |
162 | * set), the port change detection will finally fix it. | |
163 | */ | |
164 | if (t1 & PORT_CONNECT) { | |
165 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
166 | t2 &= ~PORT_WKCONN_E; | |
167 | } else { | |
168 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
169 | t2 &= ~PORT_WKDISC_E; | |
170 | } | |
171 | } else | |
58a97ffe | 172 | t2 &= ~PORT_WAKE_BITS; |
1da177e4 LT |
173 | |
174 | if (t1 != t2) { | |
175 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
176 | port + 1, t1, t2); | |
083522d7 | 177 | ehci_writel(ehci, t2, reg); |
331ac6b2 AD |
178 | if (hostpc_reg) { |
179 | u32 t3; | |
180 | ||
181 | msleep(5);/* 5ms for HCD enter low pwr mode */ | |
182 | t3 = ehci_readl(ehci, hostpc_reg); | |
183 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
184 | t3 = ehci_readl(ehci, hostpc_reg); | |
185 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
186 | port, (t3 & HOSTPC_PHCD) ? | |
187 | "succeeded" : "failed"); | |
188 | } | |
1da177e4 LT |
189 | } |
190 | } | |
191 | ||
cd930c93 AS |
192 | /* Apparently some devices need a >= 1-uframe delay here */ |
193 | if (ehci->bus_suspended) | |
194 | udelay(150); | |
195 | ||
1da177e4 LT |
196 | /* turn off now-idle HC */ |
197 | ehci_halt (ehci); | |
198 | hcd->state = HC_STATE_SUSPENDED; | |
199 | ||
cdc647a9 DB |
200 | if (ehci->reclaim) |
201 | end_unlink_async(ehci); | |
202 | ||
8c03356a AS |
203 | /* allow remote wakeup */ |
204 | mask = INTR_MASK; | |
58a97ffe | 205 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 206 | mask &= ~STS_PCD; |
083522d7 BH |
207 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
208 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 209 | |
1da177e4 LT |
210 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
211 | spin_unlock_irq (&ehci->lock); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | ||
216 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 217 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
218 | { |
219 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
220 | u32 temp; | |
383975d7 | 221 | u32 power_okay; |
1da177e4 | 222 | int i; |
3a4e72cb | 223 | u8 resume_needed = 0; |
1da177e4 LT |
224 | |
225 | if (time_before (jiffies, ehci->next_statechange)) | |
226 | msleep(5); | |
227 | spin_lock_irq (&ehci->lock); | |
cfa59dab AS |
228 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
229 | spin_unlock_irq(&ehci->lock); | |
230 | return -ESHUTDOWN; | |
231 | } | |
1da177e4 | 232 | |
f03c17fc DB |
233 | /* Ideally and we've got a real resume here, and no port's power |
234 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
235 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
236 | * the last user of the controller, not reset/pm hardware keeping | |
237 | * state we gave to it. | |
238 | */ | |
383975d7 AS |
239 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
240 | ehci_dbg(ehci, "resume root hub%s\n", | |
241 | power_okay ? "" : " after power loss"); | |
f03c17fc | 242 | |
8c03356a AS |
243 | /* at least some APM implementations will try to deliver |
244 | * IRQs right away, so delay them until we're ready. | |
245 | */ | |
083522d7 | 246 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
247 | |
248 | /* re-init operational registers */ | |
083522d7 BH |
249 | ehci_writel(ehci, 0, &ehci->regs->segment); |
250 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
251 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
252 | |
253 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
083522d7 | 254 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 | 255 | |
e198a314 AS |
256 | /* Some controller/firmware combinations need a delay during which |
257 | * they set up the port statuses. See Bugzilla #8190. */ | |
3a4e72cb VP |
258 | spin_unlock_irq(&ehci->lock); |
259 | msleep(8); | |
260 | spin_lock_irq(&ehci->lock); | |
e198a314 | 261 | |
8c03356a | 262 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
263 | i = HCS_N_PORTS (ehci->hcs_params); |
264 | while (i--) { | |
083522d7 | 265 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 266 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 267 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 268 | (temp & PORT_SUSPEND)) { |
1da177e4 | 269 | temp |= PORT_RESUME; |
3a4e72cb VP |
270 | resume_needed = 1; |
271 | } | |
083522d7 | 272 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 273 | } |
3a4e72cb VP |
274 | |
275 | /* msleep for 20ms only if code is trying to resume port */ | |
276 | if (resume_needed) { | |
277 | spin_unlock_irq(&ehci->lock); | |
278 | msleep(20); | |
279 | spin_lock_irq(&ehci->lock); | |
280 | } | |
281 | ||
1da177e4 | 282 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 283 | while (i--) { |
083522d7 | 284 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
285 | if (test_bit(i, &ehci->bus_suspended) && |
286 | (temp & PORT_SUSPEND)) { | |
287 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 288 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
289 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
290 | } | |
1da177e4 | 291 | } |
083522d7 | 292 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
293 | |
294 | /* maybe re-activate the schedule(s) */ | |
295 | temp = 0; | |
296 | if (ehci->async->qh_next.qh) | |
297 | temp |= CMD_ASE; | |
298 | if (ehci->periodic_sched) | |
299 | temp |= CMD_PSE; | |
300 | if (temp) { | |
301 | ehci->command |= temp; | |
083522d7 | 302 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
303 | } |
304 | ||
305 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
306 | hcd->state = HC_STATE_RUNNING; | |
307 | ||
308 | /* Now we can safely re-enable irqs */ | |
083522d7 | 309 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
310 | |
311 | spin_unlock_irq (&ehci->lock); | |
3bb1af52 | 312 | ehci_handover_companion_ports(ehci); |
1da177e4 LT |
313 | return 0; |
314 | } | |
315 | ||
316 | #else | |
317 | ||
0c0382e3 AS |
318 | #define ehci_bus_suspend NULL |
319 | #define ehci_bus_resume NULL | |
1da177e4 LT |
320 | |
321 | #endif /* CONFIG_PM */ | |
322 | ||
57e06c11 AS |
323 | /*-------------------------------------------------------------------------*/ |
324 | ||
325 | /* Display the ports dedicated to the companion controller */ | |
5a3201b2 TJ |
326 | static ssize_t show_companion(struct device *dev, |
327 | struct device_attribute *attr, | |
328 | char *buf) | |
57e06c11 AS |
329 | { |
330 | struct ehci_hcd *ehci; | |
331 | int nports, index, n; | |
332 | int count = PAGE_SIZE; | |
333 | char *ptr = buf; | |
334 | ||
5a3201b2 | 335 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); |
57e06c11 AS |
336 | nports = HCS_N_PORTS(ehci->hcs_params); |
337 | ||
338 | for (index = 0; index < nports; ++index) { | |
339 | if (test_bit(index, &ehci->companion_ports)) { | |
340 | n = scnprintf(ptr, count, "%d\n", index + 1); | |
341 | ptr += n; | |
342 | count -= n; | |
343 | } | |
344 | } | |
345 | return ptr - buf; | |
346 | } | |
347 | ||
348 | /* | |
90da096e | 349 | * Sets the owner of a port |
57e06c11 | 350 | */ |
90da096e | 351 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 352 | { |
57e06c11 AS |
353 | u32 __iomem *status_reg; |
354 | u32 port_status; | |
90da096e | 355 | int try; |
57e06c11 | 356 | |
90da096e | 357 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
358 | |
359 | /* | |
360 | * The controller won't set the OWNER bit if the port is | |
361 | * enabled, so this loop will sometimes require at least two | |
362 | * iterations: one to disable the port and one to set OWNER. | |
363 | */ | |
57e06c11 AS |
364 | for (try = 4; try > 0; --try) { |
365 | spin_lock_irq(&ehci->lock); | |
366 | port_status = ehci_readl(ehci, status_reg); | |
367 | if ((port_status & PORT_OWNER) == new_owner | |
368 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
369 | == 0) | |
370 | try = 0; | |
371 | else { | |
372 | port_status ^= PORT_OWNER; | |
373 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
374 | ehci_writel(ehci, port_status, status_reg); | |
375 | } | |
376 | spin_unlock_irq(&ehci->lock); | |
377 | if (try > 1) | |
378 | msleep(5); | |
379 | } | |
90da096e BR |
380 | } |
381 | ||
382 | /* | |
383 | * Dedicate or undedicate a port to the companion controller. | |
384 | * Syntax is "[-]portnum", where a leading '-' sign means | |
385 | * return control of the port to the EHCI controller. | |
386 | */ | |
387 | static ssize_t store_companion(struct device *dev, | |
388 | struct device_attribute *attr, | |
389 | const char *buf, size_t count) | |
390 | { | |
391 | struct ehci_hcd *ehci; | |
392 | int portnum, new_owner; | |
393 | ||
394 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); | |
395 | new_owner = PORT_OWNER; /* Owned by companion */ | |
396 | if (sscanf(buf, "%d", &portnum) != 1) | |
397 | return -EINVAL; | |
398 | if (portnum < 0) { | |
399 | portnum = - portnum; | |
400 | new_owner = 0; /* Owned by EHCI */ | |
401 | } | |
402 | if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | |
403 | return -ENOENT; | |
404 | portnum--; | |
405 | if (new_owner) | |
406 | set_bit(portnum, &ehci->companion_ports); | |
407 | else | |
408 | clear_bit(portnum, &ehci->companion_ports); | |
409 | set_owner(ehci, portnum, new_owner); | |
57e06c11 AS |
410 | return count; |
411 | } | |
5a3201b2 | 412 | static DEVICE_ATTR(companion, 0644, show_companion, store_companion); |
57e06c11 AS |
413 | |
414 | static inline void create_companion_file(struct ehci_hcd *ehci) | |
415 | { | |
416 | int i; | |
417 | ||
418 | /* with integrated TT there is no companion! */ | |
419 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 420 | i = device_create_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 421 | &dev_attr_companion); |
57e06c11 AS |
422 | } |
423 | ||
424 | static inline void remove_companion_file(struct ehci_hcd *ehci) | |
425 | { | |
426 | /* with integrated TT there is no companion! */ | |
427 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 428 | device_remove_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 429 | &dev_attr_companion); |
57e06c11 AS |
430 | } |
431 | ||
432 | ||
1da177e4 LT |
433 | /*-------------------------------------------------------------------------*/ |
434 | ||
435 | static int check_reset_complete ( | |
436 | struct ehci_hcd *ehci, | |
437 | int index, | |
e6316565 | 438 | u32 __iomem *status_reg, |
1da177e4 LT |
439 | int port_status |
440 | ) { | |
cd4cdc93 | 441 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 442 | return port_status; |
1da177e4 LT |
443 | |
444 | /* if reset finished and it's still not enabled -- handoff */ | |
445 | if (!(port_status & PORT_PE)) { | |
446 | ||
447 | /* with integrated TT, there's nobody to hand it to! */ | |
448 | if (ehci_is_TDI(ehci)) { | |
449 | ehci_dbg (ehci, | |
450 | "Failed to enable port %d on root hub TT\n", | |
451 | index+1); | |
452 | return port_status; | |
453 | } | |
454 | ||
455 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
456 | index + 1); | |
457 | ||
458 | // what happens if HCS_N_CC(params) == 0 ? | |
459 | port_status |= PORT_OWNER; | |
10f6524a | 460 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 461 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 462 | |
796bcae7 VB |
463 | /* ensure 440EPX ohci controller state is operational */ |
464 | if (ehci->has_amcc_usb23) | |
465 | set_ohci_hcfs(ehci, 1); | |
466 | } else { | |
1da177e4 | 467 | ehci_dbg (ehci, "port %d high speed\n", index + 1); |
796bcae7 VB |
468 | /* ensure 440EPx ohci controller state is suspended */ |
469 | if (ehci->has_amcc_usb23) | |
470 | set_ohci_hcfs(ehci, 0); | |
471 | } | |
1da177e4 LT |
472 | |
473 | return port_status; | |
474 | } | |
475 | ||
476 | /*-------------------------------------------------------------------------*/ | |
477 | ||
478 | ||
479 | /* build "status change" packet (one or two bytes) from HC registers */ | |
480 | ||
481 | static int | |
482 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
483 | { | |
484 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
485 | u32 temp, status = 0; | |
93f1a47c | 486 | u32 mask; |
1da177e4 LT |
487 | int ports, i, retval = 1; |
488 | unsigned long flags; | |
489 | ||
490 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
491 | if (!HC_IS_RUNNING(hcd->state)) | |
492 | return 0; | |
493 | ||
494 | /* init status to no-changes */ | |
495 | buf [0] = 0; | |
496 | ports = HCS_N_PORTS (ehci->hcs_params); | |
497 | if (ports > 7) { | |
498 | buf [1] = 0; | |
499 | retval++; | |
500 | } | |
53bd6a60 | 501 | |
93f1a47c DB |
502 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
503 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 504 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
505 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
506 | * PORT_POWER; that's surprising, but maybe within-spec. | |
507 | */ | |
508 | if (!ignore_oc) | |
509 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
510 | else | |
511 | mask = PORT_CSC | PORT_PEC; | |
512 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
513 | ||
1da177e4 LT |
514 | /* no hub change reports (bit 0) for now (power, ...) */ |
515 | ||
516 | /* port N changes (bit N)? */ | |
517 | spin_lock_irqsave (&ehci->lock, flags); | |
518 | for (i = 0; i < ports; i++) { | |
083522d7 | 519 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
520 | |
521 | /* | |
522 | * Return status information even for ports with OWNER set. | |
523 | * Otherwise khubd wouldn't see the disconnect event when a | |
524 | * high-speed device is switched over to the companion | |
525 | * controller by the user. | |
526 | */ | |
527 | ||
eafe5b99 AS |
528 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
529 | || (ehci->reset_done[i] && time_after_eq( | |
530 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
531 | if (i < 7) |
532 | buf [0] |= 1 << (i + 1); | |
533 | else | |
534 | buf [1] |= 1 << (i - 7); | |
535 | status = STS_PCD; | |
536 | } | |
537 | } | |
538 | /* FIXME autosuspend idle root hubs */ | |
539 | spin_unlock_irqrestore (&ehci->lock, flags); | |
540 | return status ? retval : 0; | |
541 | } | |
542 | ||
543 | /*-------------------------------------------------------------------------*/ | |
544 | ||
545 | static void | |
546 | ehci_hub_descriptor ( | |
547 | struct ehci_hcd *ehci, | |
548 | struct usb_hub_descriptor *desc | |
549 | ) { | |
550 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
551 | u16 temp; | |
552 | ||
553 | desc->bDescriptorType = 0x29; | |
554 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
555 | desc->bHubContrCurrent = 0; | |
556 | ||
557 | desc->bNbrPorts = ports; | |
558 | temp = 1 + (ports / 8); | |
559 | desc->bDescLength = 7 + 2 * temp; | |
560 | ||
561 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
562 | memset (&desc->bitmap [0], 0, temp); | |
563 | memset (&desc->bitmap [temp], 0xff, temp); | |
564 | ||
565 | temp = 0x0008; /* per-port overcurrent reporting */ | |
566 | if (HCS_PPC (ehci->hcs_params)) | |
567 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
568 | else |
569 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
570 | #if 0 |
571 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
572 | if (HCS_INDICATOR (ehci->hcs_params)) | |
573 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
574 | #endif | |
fd05e720 | 575 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
576 | } |
577 | ||
578 | /*-------------------------------------------------------------------------*/ | |
579 | ||
1da177e4 LT |
580 | static int ehci_hub_control ( |
581 | struct usb_hcd *hcd, | |
582 | u16 typeReq, | |
583 | u16 wValue, | |
584 | u16 wIndex, | |
585 | char *buf, | |
586 | u16 wLength | |
587 | ) { | |
588 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
589 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
590 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
591 | (wIndex & 0xff) - 1]; | |
331ac6b2 AD |
592 | u32 __iomem *hostpc_reg = NULL; |
593 | u32 temp, temp1, status; | |
1da177e4 LT |
594 | unsigned long flags; |
595 | int retval = 0; | |
f0d7f273 | 596 | unsigned selector; |
1da177e4 LT |
597 | |
598 | /* | |
599 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
600 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
601 | * (track current state ourselves) ... blink for diagnostics, | |
602 | * power, "this is the one", etc. EHCI spec supports this. | |
603 | */ | |
604 | ||
331ac6b2 AD |
605 | if (ehci->has_hostpc) |
606 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs | |
607 | + HOSTPC0 + 4 * ((wIndex & 0xff) - 1)); | |
1da177e4 LT |
608 | spin_lock_irqsave (&ehci->lock, flags); |
609 | switch (typeReq) { | |
610 | case ClearHubFeature: | |
611 | switch (wValue) { | |
612 | case C_HUB_LOCAL_POWER: | |
613 | case C_HUB_OVER_CURRENT: | |
614 | /* no hub-wide feature/status flags */ | |
615 | break; | |
616 | default: | |
617 | goto error; | |
618 | } | |
619 | break; | |
620 | case ClearPortFeature: | |
621 | if (!wIndex || wIndex > ports) | |
622 | goto error; | |
623 | wIndex--; | |
e6316565 | 624 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
625 | |
626 | /* | |
627 | * Even if OWNER is set, so the port is owned by the | |
628 | * companion controller, khubd needs to be able to clear | |
629 | * the port-change status bits (especially | |
630 | * USB_PORT_FEAT_C_CONNECTION). | |
631 | */ | |
1da177e4 LT |
632 | |
633 | switch (wValue) { | |
634 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 635 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
636 | break; |
637 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 638 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 639 | status_reg); |
1da177e4 LT |
640 | break; |
641 | case USB_PORT_FEAT_SUSPEND: | |
642 | if (temp & PORT_RESET) | |
643 | goto error; | |
f8aeb3bb DB |
644 | if (ehci->no_selective_suspend) |
645 | break; | |
1da177e4 LT |
646 | if (temp & PORT_SUSPEND) { |
647 | if ((temp & PORT_PE) == 0) | |
648 | goto error; | |
649 | /* resume signaling for 20 msec */ | |
10f6524a | 650 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
083522d7 | 651 | ehci_writel(ehci, temp | PORT_RESUME, |
e6316565 | 652 | status_reg); |
1da177e4 LT |
653 | ehci->reset_done [wIndex] = jiffies |
654 | + msecs_to_jiffies (20); | |
655 | } | |
656 | break; | |
657 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 658 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
659 | break; |
660 | case USB_PORT_FEAT_POWER: | |
661 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
662 | ehci_writel(ehci, |
663 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 664 | status_reg); |
1da177e4 LT |
665 | break; |
666 | case USB_PORT_FEAT_C_CONNECTION: | |
083522d7 | 667 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 668 | status_reg); |
1da177e4 LT |
669 | break; |
670 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 671 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 672 | status_reg); |
1da177e4 LT |
673 | break; |
674 | case USB_PORT_FEAT_C_RESET: | |
675 | /* GetPortStatus clears reset */ | |
676 | break; | |
677 | default: | |
678 | goto error; | |
679 | } | |
083522d7 | 680 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
681 | break; |
682 | case GetHubDescriptor: | |
683 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
684 | buf); | |
685 | break; | |
686 | case GetHubStatus: | |
687 | /* no hub-wide feature/status flags */ | |
688 | memset (buf, 0, 4); | |
689 | //cpu_to_le32s ((u32 *) buf); | |
690 | break; | |
691 | case GetPortStatus: | |
692 | if (!wIndex || wIndex > ports) | |
693 | goto error; | |
694 | wIndex--; | |
695 | status = 0; | |
e6316565 | 696 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
697 | |
698 | // wPortChange bits | |
699 | if (temp & PORT_CSC) | |
700 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
701 | if (temp & PORT_PEC) | |
702 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
756aa6b3 CE |
703 | |
704 | if ((temp & PORT_OCC) && !ignore_oc){ | |
1da177e4 LT |
705 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; |
706 | ||
756aa6b3 CE |
707 | /* |
708 | * Hubs should disable port power on over-current. | |
709 | * However, not all EHCI implementations do this | |
710 | * automatically, even if they _do_ support per-port | |
711 | * power switching; they're allowed to just limit the | |
712 | * current. khubd will turn the power back on. | |
713 | */ | |
714 | if (HCS_PPC (ehci->hcs_params)){ | |
715 | ehci_writel(ehci, | |
716 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
717 | status_reg); | |
718 | } | |
719 | } | |
720 | ||
1da177e4 | 721 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
722 | if (temp & PORT_RESUME) { |
723 | ||
724 | /* Remote Wakeup received? */ | |
725 | if (!ehci->reset_done[wIndex]) { | |
726 | /* resume signaling for 20 msec */ | |
727 | ehci->reset_done[wIndex] = jiffies | |
728 | + msecs_to_jiffies(20); | |
729 | /* check the port again */ | |
730 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
731 | ehci->reset_done[wIndex]); | |
732 | } | |
1da177e4 | 733 | |
629e4427 AS |
734 | /* resume completed? */ |
735 | else if (time_after_eq(jiffies, | |
736 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 737 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 738 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 AS |
739 | ehci->reset_done[wIndex] = 0; |
740 | ||
741 | /* stop resume signaling */ | |
742 | temp = ehci_readl(ehci, status_reg); | |
743 | ehci_writel(ehci, | |
e6316565 AS |
744 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
745 | status_reg); | |
629e4427 | 746 | retval = handshake(ehci, status_reg, |
083522d7 | 747 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
748 | if (retval != 0) { |
749 | ehci_err(ehci, | |
750 | "port %d resume error %d\n", | |
751 | wIndex + 1, retval); | |
752 | goto error; | |
753 | } | |
754 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 755 | } |
1da177e4 LT |
756 | } |
757 | ||
758 | /* whoever resets must GetPortStatus to complete it!! */ | |
759 | if ((temp & PORT_RESET) | |
629e4427 AS |
760 | && time_after_eq(jiffies, |
761 | ehci->reset_done[wIndex])) { | |
1da177e4 LT |
762 | status |= 1 << USB_PORT_FEAT_C_RESET; |
763 | ehci->reset_done [wIndex] = 0; | |
764 | ||
765 | /* force reset to complete */ | |
083522d7 | 766 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 767 | status_reg); |
c22fa3ac DB |
768 | /* REVISIT: some hardware needs 550+ usec to clear |
769 | * this bit; seems too long to spin routinely... | |
770 | */ | |
e6316565 | 771 | retval = handshake(ehci, status_reg, |
c22fa3ac | 772 | PORT_RESET, 0, 750); |
1da177e4 LT |
773 | if (retval != 0) { |
774 | ehci_err (ehci, "port %d reset error %d\n", | |
775 | wIndex + 1, retval); | |
776 | goto error; | |
777 | } | |
778 | ||
779 | /* see what we found out */ | |
e6316565 AS |
780 | temp = check_reset_complete (ehci, wIndex, status_reg, |
781 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
782 | } |
783 | ||
eafe5b99 AS |
784 | if (!(temp & (PORT_RESUME|PORT_RESET))) |
785 | ehci->reset_done[wIndex] = 0; | |
786 | ||
57e06c11 AS |
787 | /* transfer dedicated ports to the companion hc */ |
788 | if ((temp & PORT_CONNECT) && | |
789 | test_bit(wIndex, &ehci->companion_ports)) { | |
790 | temp &= ~PORT_RWC_BITS; | |
791 | temp |= PORT_OWNER; | |
792 | ehci_writel(ehci, temp, status_reg); | |
793 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
794 | temp = ehci_readl(ehci, status_reg); | |
795 | } | |
796 | ||
625b5c9a AS |
797 | /* |
798 | * Even if OWNER is set, there's no harm letting khubd | |
799 | * see the wPortStatus values (they should all be 0 except | |
800 | * for PORT_POWER anyway). | |
801 | */ | |
802 | ||
803 | if (temp & PORT_CONNECT) { | |
804 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
805 | // status may be from integrated TT | |
331ac6b2 AD |
806 | if (ehci->has_hostpc) { |
807 | temp1 = ehci_readl(ehci, hostpc_reg); | |
808 | status |= ehci_port_speed(ehci, temp1); | |
809 | } else | |
810 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 811 | } |
625b5c9a AS |
812 | if (temp & PORT_PE) |
813 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
eafe5b99 AS |
814 | |
815 | /* maybe the port was unsuspended without our knowledge */ | |
816 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
625b5c9a | 817 | status |= 1 << USB_PORT_FEAT_SUSPEND; |
eafe5b99 AS |
818 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
819 | clear_bit(wIndex, &ehci->suspended_ports); | |
820 | ehci->reset_done[wIndex] = 0; | |
821 | if (temp & PORT_PE) | |
822 | set_bit(wIndex, &ehci->port_c_suspend); | |
823 | } | |
824 | ||
625b5c9a AS |
825 | if (temp & PORT_OC) |
826 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
827 | if (temp & PORT_RESET) | |
828 | status |= 1 << USB_PORT_FEAT_RESET; | |
829 | if (temp & PORT_POWER) | |
830 | status |= 1 << USB_PORT_FEAT_POWER; | |
d1f114d1 AS |
831 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
832 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
1da177e4 | 833 | |
9776afc8 | 834 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
835 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
836 | #endif | |
837 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 838 | put_unaligned_le32(status, buf); |
1da177e4 LT |
839 | break; |
840 | case SetHubFeature: | |
841 | switch (wValue) { | |
842 | case C_HUB_LOCAL_POWER: | |
843 | case C_HUB_OVER_CURRENT: | |
844 | /* no hub-wide feature/status flags */ | |
845 | break; | |
846 | default: | |
847 | goto error; | |
848 | } | |
849 | break; | |
850 | case SetPortFeature: | |
f0d7f273 DB |
851 | selector = wIndex >> 8; |
852 | wIndex &= 0xff; | |
1da177e4 LT |
853 | if (!wIndex || wIndex > ports) |
854 | goto error; | |
855 | wIndex--; | |
e6316565 | 856 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
857 | if (temp & PORT_OWNER) |
858 | break; | |
859 | ||
10f6524a | 860 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
861 | switch (wValue) { |
862 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
863 | if (ehci->no_selective_suspend) |
864 | break; | |
1da177e4 LT |
865 | if ((temp & PORT_PE) == 0 |
866 | || (temp & PORT_RESET) != 0) | |
867 | goto error; | |
e6316565 | 868 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
331ac6b2 AD |
869 | /* After above check the port must be connected. |
870 | * Set appropriate bit thus could put phy into low power | |
871 | * mode if we have hostpc feature | |
872 | */ | |
873 | if (hostpc_reg) { | |
874 | temp &= ~PORT_WKCONN_E; | |
875 | temp |= (PORT_WKDISC_E | PORT_WKOC_E); | |
876 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
877 | status_reg); | |
878 | msleep(5);/* 5ms for HCD enter low pwr mode */ | |
879 | temp1 = ehci_readl(ehci, hostpc_reg); | |
880 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
881 | hostpc_reg); | |
882 | temp1 = ehci_readl(ehci, hostpc_reg); | |
883 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
884 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
885 | "succeeded" : "failed"); | |
886 | } | |
eafe5b99 | 887 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
888 | break; |
889 | case USB_PORT_FEAT_POWER: | |
890 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 891 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 892 | status_reg); |
1da177e4 LT |
893 | break; |
894 | case USB_PORT_FEAT_RESET: | |
895 | if (temp & PORT_RESUME) | |
896 | goto error; | |
897 | /* line status bits may report this as low speed, | |
898 | * which can be fine if this root hub has a | |
899 | * transaction translator built in. | |
900 | */ | |
901 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
902 | && !ehci_is_TDI(ehci) | |
903 | && PORT_USB11 (temp)) { | |
904 | ehci_dbg (ehci, | |
905 | "port %d low speed --> companion\n", | |
906 | wIndex + 1); | |
907 | temp |= PORT_OWNER; | |
908 | } else { | |
909 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
910 | temp |= PORT_RESET; | |
911 | temp &= ~PORT_PE; | |
912 | ||
913 | /* | |
914 | * caller must wait, then call GetPortStatus | |
915 | * usb 2.0 spec says 50 ms resets on root | |
916 | */ | |
917 | ehci->reset_done [wIndex] = jiffies | |
918 | + msecs_to_jiffies (50); | |
919 | } | |
e6316565 | 920 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 921 | break; |
f0d7f273 DB |
922 | |
923 | /* For downstream facing ports (these): one hub port is put | |
924 | * into test mode according to USB2 11.24.2.13, then the hub | |
925 | * must be reset (which for root hub now means rmmod+modprobe, | |
926 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
927 | * about the EHCI-specific stuff. | |
928 | */ | |
929 | case USB_PORT_FEAT_TEST: | |
930 | if (!selector || selector > 5) | |
931 | goto error; | |
932 | ehci_quiesce(ehci); | |
933 | ehci_halt(ehci); | |
934 | temp |= selector << 16; | |
e6316565 | 935 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
936 | break; |
937 | ||
1da177e4 LT |
938 | default: |
939 | goto error; | |
940 | } | |
083522d7 | 941 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
942 | break; |
943 | ||
944 | default: | |
945 | error: | |
946 | /* "stall" on error */ | |
947 | retval = -EPIPE; | |
948 | } | |
949 | spin_unlock_irqrestore (&ehci->lock, flags); | |
950 | return retval; | |
951 | } | |
90da096e BR |
952 | |
953 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) | |
954 | { | |
955 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
956 | ||
957 | if (ehci_is_TDI(ehci)) | |
958 | return; | |
959 | set_owner(ehci, --portnum, PORT_OWNER); | |
960 | } | |
961 | ||
3a31155c AS |
962 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
963 | { | |
964 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
965 | u32 __iomem *reg; | |
966 | ||
967 | if (ehci_is_TDI(ehci)) | |
968 | return 0; | |
969 | reg = &ehci->regs->port_status[portnum - 1]; | |
970 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
971 | } |