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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 | /*-------------------------------------------------------------------------*/ | |
83722bc9 | 30 | #include <linux/usb/otg.h> |
1da177e4 | 31 | |
58a97ffe AS |
32 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
33 | ||
aff6d18f AS |
34 | #ifdef CONFIG_PM |
35 | ||
383975d7 AS |
36 | static int ehci_hub_control( |
37 | struct usb_hcd *hcd, | |
38 | u16 typeReq, | |
39 | u16 wValue, | |
40 | u16 wIndex, | |
41 | char *buf, | |
42 | u16 wLength | |
43 | ); | |
44 | ||
45 | /* After a power loss, ports that were owned by the companion must be | |
46 | * reset so that the companion can still own them. | |
47 | */ | |
48 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
49 | { | |
50 | u32 __iomem *reg; | |
51 | u32 status; | |
52 | int port; | |
53 | __le32 buf; | |
54 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
55 | ||
56 | if (!ehci->owned_ports) | |
57 | return; | |
58 | ||
59 | /* Give the connections some time to appear */ | |
60 | msleep(20); | |
61 | ||
62 | port = HCS_N_PORTS(ehci->hcs_params); | |
63 | while (port--) { | |
64 | if (test_bit(port, &ehci->owned_ports)) { | |
65 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 66 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
67 | |
68 | /* Port already owned by companion? */ | |
69 | if (status & PORT_OWNER) | |
70 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
71 | else if (test_bit(port, &ehci->companion_ports)) |
72 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
383975d7 AS |
73 | else |
74 | ehci_hub_control(hcd, SetPortFeature, | |
75 | USB_PORT_FEAT_RESET, port + 1, | |
76 | NULL, 0); | |
77 | } | |
78 | } | |
79 | ||
80 | if (!ehci->owned_ports) | |
81 | return; | |
82 | msleep(90); /* Wait for resets to complete */ | |
83 | ||
84 | port = HCS_N_PORTS(ehci->hcs_params); | |
85 | while (port--) { | |
86 | if (test_bit(port, &ehci->owned_ports)) { | |
87 | ehci_hub_control(hcd, GetPortStatus, | |
88 | 0, port + 1, | |
89 | (char *) &buf, sizeof(buf)); | |
90 | ||
91 | /* The companion should now own the port, | |
92 | * but if something went wrong the port must not | |
93 | * remain enabled. | |
94 | */ | |
95 | reg = &ehci->regs->port_status[port]; | |
96 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
97 | if (status & PORT_OWNER) | |
98 | ehci_writel(ehci, status | PORT_CSC, reg); | |
99 | else { | |
100 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
101 | port + 1, status); | |
102 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
103 | } | |
104 | } | |
105 | } | |
106 | ||
107 | ehci->owned_ports = 0; | |
108 | } | |
109 | ||
294d95f2 MG |
110 | static int ehci_port_change(struct ehci_hcd *ehci) |
111 | { | |
112 | int i = HCS_N_PORTS(ehci->hcs_params); | |
113 | ||
114 | /* First check if the controller indicates a change event */ | |
115 | ||
116 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) | |
117 | return 1; | |
118 | ||
119 | /* | |
120 | * Not all controllers appear to update this while going from D3 to D0, | |
121 | * so check the individual port status registers as well | |
122 | */ | |
123 | ||
124 | while (i--) | |
125 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) | |
126 | return 1; | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
0b0cd6c8 | 131 | static __maybe_unused void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 132 | bool suspending, bool do_wakeup) |
16032c4f AS |
133 | { |
134 | int port; | |
135 | u32 temp; | |
148fc55f | 136 | unsigned long flags; |
16032c4f AS |
137 | |
138 | /* If remote wakeup is enabled for the root hub but disabled | |
139 | * for the controller, we must adjust all the port wakeup flags | |
140 | * when the controller is suspended or resumed. In all other | |
141 | * cases they don't need to be changed. | |
142 | */ | |
4147200d | 143 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
144 | return; |
145 | ||
148fc55f YK |
146 | spin_lock_irqsave(&ehci->lock, flags); |
147 | ||
16032c4f AS |
148 | /* clear phy low-power mode before changing wakeup flags */ |
149 | if (ehci->has_hostpc) { | |
150 | port = HCS_N_PORTS(ehci->hcs_params); | |
151 | while (port--) { | |
152 | u32 __iomem *hostpc_reg; | |
153 | ||
154 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs | |
155 | + HOSTPC0 + 4 * port); | |
156 | temp = ehci_readl(ehci, hostpc_reg); | |
157 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
158 | } | |
148fc55f | 159 | spin_unlock_irqrestore(&ehci->lock, flags); |
16032c4f | 160 | msleep(5); |
148fc55f | 161 | spin_lock_irqsave(&ehci->lock, flags); |
16032c4f AS |
162 | } |
163 | ||
164 | port = HCS_N_PORTS(ehci->hcs_params); | |
165 | while (port--) { | |
166 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
167 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
168 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
169 | ||
170 | /* If we are suspending the controller, clear the flags. | |
171 | * If we are resuming the controller, set the wakeup flags. | |
172 | */ | |
173 | if (!suspending) { | |
174 | if (t1 & PORT_CONNECT) | |
175 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
176 | else | |
177 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
178 | } | |
179 | ehci_vdbg(ehci, "port %d, %08x -> %08x\n", | |
180 | port + 1, t1, t2); | |
181 | ehci_writel(ehci, t2, reg); | |
182 | } | |
183 | ||
184 | /* enter phy low-power mode again */ | |
185 | if (ehci->has_hostpc) { | |
186 | port = HCS_N_PORTS(ehci->hcs_params); | |
187 | while (port--) { | |
188 | u32 __iomem *hostpc_reg; | |
189 | ||
190 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs | |
191 | + HOSTPC0 + 4 * port); | |
192 | temp = ehci_readl(ehci, hostpc_reg); | |
193 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
194 | } | |
195 | } | |
ee0b9be8 AS |
196 | |
197 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 198 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 199 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f YK |
200 | |
201 | spin_unlock_irqrestore(&ehci->lock, flags); | |
16032c4f AS |
202 | } |
203 | ||
0c0382e3 | 204 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
205 | { |
206 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
207 | int port; | |
8c03356a | 208 | int mask; |
16032c4f | 209 | int changed; |
1da177e4 | 210 | |
8c774fe8 AS |
211 | ehci_dbg(ehci, "suspend root hub\n"); |
212 | ||
1da177e4 LT |
213 | if (time_before (jiffies, ehci->next_statechange)) |
214 | msleep(5); | |
f8fa7571 AS |
215 | del_timer_sync(&ehci->watchdog); |
216 | del_timer_sync(&ehci->iaa_watchdog); | |
1da177e4 | 217 | |
1da177e4 LT |
218 | spin_lock_irq (&ehci->lock); |
219 | ||
cec3a53c AS |
220 | /* Once the controller is stopped, port resumes that are already |
221 | * in progress won't complete. Hence if remote wakeup is enabled | |
222 | * for the root hub and any ports are in the middle of a resume or | |
223 | * remote wakeup, we must fail the suspend. | |
224 | */ | |
225 | if (hcd->self.root_hub->do_remote_wakeup) { | |
226 | port = HCS_N_PORTS(ehci->hcs_params); | |
227 | while (port--) { | |
228 | if (ehci->reset_done[port] != 0) { | |
229 | spin_unlock_irq(&ehci->lock); | |
230 | ehci_dbg(ehci, "suspend failed because " | |
231 | "port %d is resuming\n", | |
232 | port + 1); | |
233 | return -EBUSY; | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
1da177e4 LT |
238 | /* stop schedules, clean any completed work */ |
239 | if (HC_IS_RUNNING(hcd->state)) { | |
240 | ehci_quiesce (ehci); | |
241 | hcd->state = HC_STATE_QUIESCING; | |
242 | } | |
083522d7 | 243 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
7d12e780 | 244 | ehci_work(ehci); |
1da177e4 | 245 | |
8c03356a AS |
246 | /* Unlike other USB host controller types, EHCI doesn't have |
247 | * any notion of "global" or bus-wide suspend. The driver has | |
248 | * to manually suspend all the active unsuspended ports, and | |
249 | * then manually resume them in the bus_resume() routine. | |
250 | */ | |
251 | ehci->bus_suspended = 0; | |
383975d7 | 252 | ehci->owned_ports = 0; |
16032c4f | 253 | changed = 0; |
cec3a53c | 254 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
255 | while (port--) { |
256 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 257 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 258 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 259 | |
8c03356a | 260 | /* keep track of which ports we suspend */ |
383975d7 AS |
261 | if (t1 & PORT_OWNER) |
262 | set_bit(port, &ehci->owned_ports); | |
263 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 264 | t2 |= PORT_SUSPEND; |
8c03356a AS |
265 | set_bit(port, &ehci->bus_suspended); |
266 | } | |
267 | ||
16032c4f | 268 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
269 | if (hcd->self.root_hub->do_remote_wakeup) { |
270 | /* only enable appropriate wake bits, otherwise the | |
271 | * hardware can not go phy low power mode. If a race | |
272 | * condition happens here(connection change during bits | |
273 | * set), the port change detection will finally fix it. | |
274 | */ | |
16032c4f | 275 | if (t1 & PORT_CONNECT) |
331ac6b2 | 276 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 277 | else |
331ac6b2 | 278 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 279 | } |
1da177e4 LT |
280 | |
281 | if (t1 != t2) { | |
282 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
283 | port + 1, t1, t2); | |
083522d7 | 284 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
285 | changed = 1; |
286 | } | |
287 | } | |
331ac6b2 | 288 | |
16032c4f AS |
289 | if (changed && ehci->has_hostpc) { |
290 | spin_unlock_irq(&ehci->lock); | |
291 | msleep(5); /* 5 ms for HCD to enter low-power mode */ | |
292 | spin_lock_irq(&ehci->lock); | |
293 | ||
294 | port = HCS_N_PORTS(ehci->hcs_params); | |
295 | while (port--) { | |
296 | u32 __iomem *hostpc_reg; | |
297 | u32 t3; | |
298 | ||
299 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs | |
300 | + HOSTPC0 + 4 * port); | |
301 | t3 = ehci_readl(ehci, hostpc_reg); | |
302 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
303 | t3 = ehci_readl(ehci, hostpc_reg); | |
304 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
305 | port, (t3 & HOSTPC_PHCD) ? |
306 | "succeeded" : "failed"); | |
1da177e4 LT |
307 | } |
308 | } | |
309 | ||
cd930c93 AS |
310 | /* Apparently some devices need a >= 1-uframe delay here */ |
311 | if (ehci->bus_suspended) | |
312 | udelay(150); | |
313 | ||
1da177e4 LT |
314 | /* turn off now-idle HC */ |
315 | ehci_halt (ehci); | |
316 | hcd->state = HC_STATE_SUSPENDED; | |
317 | ||
cdc647a9 DB |
318 | if (ehci->reclaim) |
319 | end_unlink_async(ehci); | |
320 | ||
8c03356a AS |
321 | /* allow remote wakeup */ |
322 | mask = INTR_MASK; | |
58a97ffe | 323 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 324 | mask &= ~STS_PCD; |
083522d7 BH |
325 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
326 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 327 | |
1da177e4 LT |
328 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
329 | spin_unlock_irq (&ehci->lock); | |
015798b2 JH |
330 | |
331 | /* ehci_work() may have re-enabled the watchdog timer, which we do not | |
332 | * want, and so we must delete any pending watchdog timer events. | |
333 | */ | |
334 | del_timer_sync(&ehci->watchdog); | |
1da177e4 LT |
335 | return 0; |
336 | } | |
337 | ||
338 | ||
339 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 340 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
341 | { |
342 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
343 | u32 temp; | |
383975d7 | 344 | u32 power_okay; |
1da177e4 | 345 | int i; |
3a4e72cb | 346 | u8 resume_needed = 0; |
1da177e4 LT |
347 | |
348 | if (time_before (jiffies, ehci->next_statechange)) | |
349 | msleep(5); | |
350 | spin_lock_irq (&ehci->lock); | |
541c7d43 | 351 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab AS |
352 | spin_unlock_irq(&ehci->lock); |
353 | return -ESHUTDOWN; | |
354 | } | |
1da177e4 | 355 | |
ad45f1dc | 356 | if (unlikely(ehci->debug)) { |
872d3599 | 357 | if (!dbgp_reset_prep()) |
ad45f1dc JW |
358 | ehci->debug = NULL; |
359 | else | |
360 | dbgp_external_startup(); | |
361 | } | |
362 | ||
f03c17fc DB |
363 | /* Ideally and we've got a real resume here, and no port's power |
364 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
365 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
366 | * the last user of the controller, not reset/pm hardware keeping | |
367 | * state we gave to it. | |
368 | */ | |
383975d7 AS |
369 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
370 | ehci_dbg(ehci, "resume root hub%s\n", | |
371 | power_okay ? "" : " after power loss"); | |
f03c17fc | 372 | |
8c03356a AS |
373 | /* at least some APM implementations will try to deliver |
374 | * IRQs right away, so delay them until we're ready. | |
375 | */ | |
083522d7 | 376 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
377 | |
378 | /* re-init operational registers */ | |
083522d7 BH |
379 | ehci_writel(ehci, 0, &ehci->regs->segment); |
380 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
381 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
382 | |
383 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
083522d7 | 384 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 | 385 | |
e198a314 AS |
386 | /* Some controller/firmware combinations need a delay during which |
387 | * they set up the port statuses. See Bugzilla #8190. */ | |
3a4e72cb VP |
388 | spin_unlock_irq(&ehci->lock); |
389 | msleep(8); | |
390 | spin_lock_irq(&ehci->lock); | |
e198a314 | 391 | |
16032c4f AS |
392 | /* clear phy low-power mode before resume */ |
393 | if (ehci->bus_suspended && ehci->has_hostpc) { | |
394 | i = HCS_N_PORTS(ehci->hcs_params); | |
395 | while (i--) { | |
396 | if (test_bit(i, &ehci->bus_suspended)) { | |
397 | u32 __iomem *hostpc_reg; | |
398 | ||
399 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs | |
400 | + HOSTPC0 + 4 * i); | |
401 | temp = ehci_readl(ehci, hostpc_reg); | |
402 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
403 | hostpc_reg); | |
404 | } | |
405 | } | |
406 | spin_unlock_irq(&ehci->lock); | |
407 | msleep(5); | |
408 | spin_lock_irq(&ehci->lock); | |
409 | } | |
410 | ||
8c03356a | 411 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
412 | i = HCS_N_PORTS (ehci->hcs_params); |
413 | while (i--) { | |
083522d7 | 414 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 415 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 416 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 417 | (temp & PORT_SUSPEND)) { |
1da177e4 | 418 | temp |= PORT_RESUME; |
3a4e72cb VP |
419 | resume_needed = 1; |
420 | } | |
083522d7 | 421 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 422 | } |
3a4e72cb VP |
423 | |
424 | /* msleep for 20ms only if code is trying to resume port */ | |
425 | if (resume_needed) { | |
426 | spin_unlock_irq(&ehci->lock); | |
427 | msleep(20); | |
428 | spin_lock_irq(&ehci->lock); | |
429 | } | |
430 | ||
1da177e4 | 431 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 432 | while (i--) { |
083522d7 | 433 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
434 | if (test_bit(i, &ehci->bus_suspended) && |
435 | (temp & PORT_SUSPEND)) { | |
436 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 437 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
438 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
439 | } | |
1da177e4 | 440 | } |
083522d7 | 441 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
442 | |
443 | /* maybe re-activate the schedule(s) */ | |
444 | temp = 0; | |
445 | if (ehci->async->qh_next.qh) | |
446 | temp |= CMD_ASE; | |
447 | if (ehci->periodic_sched) | |
448 | temp |= CMD_PSE; | |
449 | if (temp) { | |
450 | ehci->command |= temp; | |
083522d7 | 451 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
452 | } |
453 | ||
454 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
455 | hcd->state = HC_STATE_RUNNING; | |
456 | ||
457 | /* Now we can safely re-enable irqs */ | |
083522d7 | 458 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
459 | |
460 | spin_unlock_irq (&ehci->lock); | |
3bb1af52 | 461 | ehci_handover_companion_ports(ehci); |
1da177e4 LT |
462 | return 0; |
463 | } | |
464 | ||
465 | #else | |
466 | ||
0c0382e3 AS |
467 | #define ehci_bus_suspend NULL |
468 | #define ehci_bus_resume NULL | |
1da177e4 LT |
469 | |
470 | #endif /* CONFIG_PM */ | |
471 | ||
57e06c11 AS |
472 | /*-------------------------------------------------------------------------*/ |
473 | ||
57e06c11 | 474 | /* |
90da096e | 475 | * Sets the owner of a port |
57e06c11 | 476 | */ |
90da096e | 477 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 478 | { |
57e06c11 AS |
479 | u32 __iomem *status_reg; |
480 | u32 port_status; | |
90da096e | 481 | int try; |
57e06c11 | 482 | |
90da096e | 483 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
484 | |
485 | /* | |
486 | * The controller won't set the OWNER bit if the port is | |
487 | * enabled, so this loop will sometimes require at least two | |
488 | * iterations: one to disable the port and one to set OWNER. | |
489 | */ | |
57e06c11 AS |
490 | for (try = 4; try > 0; --try) { |
491 | spin_lock_irq(&ehci->lock); | |
492 | port_status = ehci_readl(ehci, status_reg); | |
493 | if ((port_status & PORT_OWNER) == new_owner | |
494 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
495 | == 0) | |
496 | try = 0; | |
497 | else { | |
498 | port_status ^= PORT_OWNER; | |
499 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
500 | ehci_writel(ehci, port_status, status_reg); | |
501 | } | |
502 | spin_unlock_irq(&ehci->lock); | |
503 | if (try > 1) | |
504 | msleep(5); | |
505 | } | |
90da096e BR |
506 | } |
507 | ||
1da177e4 LT |
508 | /*-------------------------------------------------------------------------*/ |
509 | ||
510 | static int check_reset_complete ( | |
511 | struct ehci_hcd *ehci, | |
512 | int index, | |
e6316565 | 513 | u32 __iomem *status_reg, |
1da177e4 LT |
514 | int port_status |
515 | ) { | |
cd4cdc93 | 516 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 517 | return port_status; |
1da177e4 LT |
518 | |
519 | /* if reset finished and it's still not enabled -- handoff */ | |
520 | if (!(port_status & PORT_PE)) { | |
521 | ||
522 | /* with integrated TT, there's nobody to hand it to! */ | |
523 | if (ehci_is_TDI(ehci)) { | |
524 | ehci_dbg (ehci, | |
525 | "Failed to enable port %d on root hub TT\n", | |
526 | index+1); | |
527 | return port_status; | |
528 | } | |
529 | ||
530 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
531 | index + 1); | |
532 | ||
533 | // what happens if HCS_N_CC(params) == 0 ? | |
534 | port_status |= PORT_OWNER; | |
10f6524a | 535 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 536 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 537 | |
796bcae7 VB |
538 | /* ensure 440EPX ohci controller state is operational */ |
539 | if (ehci->has_amcc_usb23) | |
540 | set_ohci_hcfs(ehci, 1); | |
541 | } else { | |
1da177e4 | 542 | ehci_dbg (ehci, "port %d high speed\n", index + 1); |
796bcae7 VB |
543 | /* ensure 440EPx ohci controller state is suspended */ |
544 | if (ehci->has_amcc_usb23) | |
545 | set_ohci_hcfs(ehci, 0); | |
546 | } | |
1da177e4 LT |
547 | |
548 | return port_status; | |
549 | } | |
550 | ||
551 | /*-------------------------------------------------------------------------*/ | |
552 | ||
553 | ||
554 | /* build "status change" packet (one or two bytes) from HC registers */ | |
555 | ||
556 | static int | |
557 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
558 | { | |
559 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
560 | u32 temp, status = 0; | |
93f1a47c | 561 | u32 mask; |
1da177e4 LT |
562 | int ports, i, retval = 1; |
563 | unsigned long flags; | |
5a9cdf33 | 564 | u32 ppcd = 0; |
1da177e4 LT |
565 | |
566 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
567 | if (!HC_IS_RUNNING(hcd->state)) | |
568 | return 0; | |
569 | ||
570 | /* init status to no-changes */ | |
571 | buf [0] = 0; | |
572 | ports = HCS_N_PORTS (ehci->hcs_params); | |
573 | if (ports > 7) { | |
574 | buf [1] = 0; | |
575 | retval++; | |
576 | } | |
53bd6a60 | 577 | |
93f1a47c DB |
578 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
579 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 580 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
581 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
582 | * PORT_POWER; that's surprising, but maybe within-spec. | |
583 | */ | |
584 | if (!ignore_oc) | |
585 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
586 | else | |
587 | mask = PORT_CSC | PORT_PEC; | |
588 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
589 | ||
1da177e4 LT |
590 | /* no hub change reports (bit 0) for now (power, ...) */ |
591 | ||
592 | /* port N changes (bit N)? */ | |
593 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
594 | |
595 | /* get per-port change detect bits */ | |
596 | if (ehci->has_ppcd) | |
597 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
598 | ||
1da177e4 | 599 | for (i = 0; i < ports; i++) { |
5a9cdf33 AD |
600 | /* leverage per-port change bits feature */ |
601 | if (ehci->has_ppcd && !(ppcd & (1 << i))) | |
602 | continue; | |
083522d7 | 603 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
604 | |
605 | /* | |
606 | * Return status information even for ports with OWNER set. | |
607 | * Otherwise khubd wouldn't see the disconnect event when a | |
608 | * high-speed device is switched over to the companion | |
609 | * controller by the user. | |
610 | */ | |
611 | ||
eafe5b99 AS |
612 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
613 | || (ehci->reset_done[i] && time_after_eq( | |
614 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
615 | if (i < 7) |
616 | buf [0] |= 1 << (i + 1); | |
617 | else | |
618 | buf [1] |= 1 << (i - 7); | |
619 | status = STS_PCD; | |
620 | } | |
621 | } | |
622 | /* FIXME autosuspend idle root hubs */ | |
623 | spin_unlock_irqrestore (&ehci->lock, flags); | |
624 | return status ? retval : 0; | |
625 | } | |
626 | ||
627 | /*-------------------------------------------------------------------------*/ | |
628 | ||
629 | static void | |
630 | ehci_hub_descriptor ( | |
631 | struct ehci_hcd *ehci, | |
632 | struct usb_hub_descriptor *desc | |
633 | ) { | |
634 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
635 | u16 temp; | |
636 | ||
637 | desc->bDescriptorType = 0x29; | |
638 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
639 | desc->bHubContrCurrent = 0; | |
640 | ||
641 | desc->bNbrPorts = ports; | |
642 | temp = 1 + (ports / 8); | |
643 | desc->bDescLength = 7 + 2 * temp; | |
644 | ||
645 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
646 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
647 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 LT |
648 | |
649 | temp = 0x0008; /* per-port overcurrent reporting */ | |
650 | if (HCS_PPC (ehci->hcs_params)) | |
651 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
652 | else |
653 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
654 | #if 0 |
655 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
656 | if (HCS_INDICATOR (ehci->hcs_params)) | |
657 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
658 | #endif | |
fd05e720 | 659 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
660 | } |
661 | ||
662 | /*-------------------------------------------------------------------------*/ | |
663 | ||
1da177e4 LT |
664 | static int ehci_hub_control ( |
665 | struct usb_hcd *hcd, | |
666 | u16 typeReq, | |
667 | u16 wValue, | |
668 | u16 wIndex, | |
669 | char *buf, | |
670 | u16 wLength | |
671 | ) { | |
672 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
673 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
674 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
675 | (wIndex & 0xff) - 1]; | |
331ac6b2 AD |
676 | u32 __iomem *hostpc_reg = NULL; |
677 | u32 temp, temp1, status; | |
1da177e4 LT |
678 | unsigned long flags; |
679 | int retval = 0; | |
f0d7f273 | 680 | unsigned selector; |
1da177e4 LT |
681 | |
682 | /* | |
683 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
684 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
685 | * (track current state ourselves) ... blink for diagnostics, | |
686 | * power, "this is the one", etc. EHCI spec supports this. | |
687 | */ | |
688 | ||
331ac6b2 AD |
689 | if (ehci->has_hostpc) |
690 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs | |
691 | + HOSTPC0 + 4 * ((wIndex & 0xff) - 1)); | |
1da177e4 LT |
692 | spin_lock_irqsave (&ehci->lock, flags); |
693 | switch (typeReq) { | |
694 | case ClearHubFeature: | |
695 | switch (wValue) { | |
696 | case C_HUB_LOCAL_POWER: | |
697 | case C_HUB_OVER_CURRENT: | |
698 | /* no hub-wide feature/status flags */ | |
699 | break; | |
700 | default: | |
701 | goto error; | |
702 | } | |
703 | break; | |
704 | case ClearPortFeature: | |
705 | if (!wIndex || wIndex > ports) | |
706 | goto error; | |
707 | wIndex--; | |
e6316565 | 708 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
709 | |
710 | /* | |
711 | * Even if OWNER is set, so the port is owned by the | |
712 | * companion controller, khubd needs to be able to clear | |
713 | * the port-change status bits (especially | |
749da5f8 | 714 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 715 | */ |
1da177e4 LT |
716 | |
717 | switch (wValue) { | |
718 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 719 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
720 | break; |
721 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 722 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 723 | status_reg); |
1da177e4 LT |
724 | break; |
725 | case USB_PORT_FEAT_SUSPEND: | |
726 | if (temp & PORT_RESET) | |
727 | goto error; | |
f8aeb3bb DB |
728 | if (ehci->no_selective_suspend) |
729 | break; | |
83722bc9 AG |
730 | #ifdef CONFIG_USB_OTG |
731 | if ((hcd->self.otg_port == (wIndex + 1)) | |
732 | && hcd->self.b_hnp_enable) { | |
733 | otg_start_hnp(ehci->transceiver); | |
734 | break; | |
735 | } | |
736 | #endif | |
16032c4f AS |
737 | if (!(temp & PORT_SUSPEND)) |
738 | break; | |
739 | if ((temp & PORT_PE) == 0) | |
740 | goto error; | |
741 | ||
742 | /* clear phy low-power mode before resume */ | |
743 | if (hostpc_reg) { | |
744 | temp1 = ehci_readl(ehci, hostpc_reg); | |
745 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 746 | hostpc_reg); |
16032c4f AS |
747 | spin_unlock_irqrestore(&ehci->lock, flags); |
748 | msleep(5);/* wait to leave low-power mode */ | |
749 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 750 | } |
16032c4f AS |
751 | /* resume signaling for 20 msec */ |
752 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); | |
753 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); | |
754 | ehci->reset_done[wIndex] = jiffies | |
755 | + msecs_to_jiffies(20); | |
1da177e4 LT |
756 | break; |
757 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 758 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
759 | break; |
760 | case USB_PORT_FEAT_POWER: | |
761 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
762 | ehci_writel(ehci, |
763 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 764 | status_reg); |
1da177e4 LT |
765 | break; |
766 | case USB_PORT_FEAT_C_CONNECTION: | |
48f24970 AD |
767 | if (ehci->has_lpm) { |
768 | /* clear PORTSC bits on disconnect */ | |
769 | temp &= ~PORT_LPM; | |
770 | temp &= ~PORT_DEV_ADDR; | |
771 | } | |
083522d7 | 772 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 773 | status_reg); |
1da177e4 LT |
774 | break; |
775 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 776 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 777 | status_reg); |
1da177e4 LT |
778 | break; |
779 | case USB_PORT_FEAT_C_RESET: | |
780 | /* GetPortStatus clears reset */ | |
781 | break; | |
782 | default: | |
783 | goto error; | |
784 | } | |
083522d7 | 785 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
786 | break; |
787 | case GetHubDescriptor: | |
788 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
789 | buf); | |
790 | break; | |
791 | case GetHubStatus: | |
792 | /* no hub-wide feature/status flags */ | |
793 | memset (buf, 0, 4); | |
794 | //cpu_to_le32s ((u32 *) buf); | |
795 | break; | |
796 | case GetPortStatus: | |
797 | if (!wIndex || wIndex > ports) | |
798 | goto error; | |
799 | wIndex--; | |
800 | status = 0; | |
e6316565 | 801 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
802 | |
803 | // wPortChange bits | |
804 | if (temp & PORT_CSC) | |
749da5f8 | 805 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 806 | if (temp & PORT_PEC) |
749da5f8 | 807 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
808 | |
809 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 810 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 811 | |
756aa6b3 CE |
812 | /* |
813 | * Hubs should disable port power on over-current. | |
814 | * However, not all EHCI implementations do this | |
815 | * automatically, even if they _do_ support per-port | |
816 | * power switching; they're allowed to just limit the | |
817 | * current. khubd will turn the power back on. | |
818 | */ | |
81463c1d | 819 | if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) { |
756aa6b3 CE |
820 | ehci_writel(ehci, |
821 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
822 | status_reg); | |
81463c1d | 823 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
824 | } |
825 | } | |
826 | ||
1da177e4 | 827 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
828 | if (temp & PORT_RESUME) { |
829 | ||
830 | /* Remote Wakeup received? */ | |
831 | if (!ehci->reset_done[wIndex]) { | |
832 | /* resume signaling for 20 msec */ | |
833 | ehci->reset_done[wIndex] = jiffies | |
834 | + msecs_to_jiffies(20); | |
835 | /* check the port again */ | |
836 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
837 | ehci->reset_done[wIndex]); | |
838 | } | |
1da177e4 | 839 | |
629e4427 AS |
840 | /* resume completed? */ |
841 | else if (time_after_eq(jiffies, | |
842 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 843 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 844 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 AS |
845 | ehci->reset_done[wIndex] = 0; |
846 | ||
847 | /* stop resume signaling */ | |
848 | temp = ehci_readl(ehci, status_reg); | |
849 | ehci_writel(ehci, | |
e6316565 AS |
850 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
851 | status_reg); | |
629e4427 | 852 | retval = handshake(ehci, status_reg, |
083522d7 | 853 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
854 | if (retval != 0) { |
855 | ehci_err(ehci, | |
856 | "port %d resume error %d\n", | |
857 | wIndex + 1, retval); | |
858 | goto error; | |
859 | } | |
860 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 861 | } |
1da177e4 LT |
862 | } |
863 | ||
864 | /* whoever resets must GetPortStatus to complete it!! */ | |
865 | if ((temp & PORT_RESET) | |
629e4427 AS |
866 | && time_after_eq(jiffies, |
867 | ehci->reset_done[wIndex])) { | |
749da5f8 | 868 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 LT |
869 | ehci->reset_done [wIndex] = 0; |
870 | ||
871 | /* force reset to complete */ | |
083522d7 | 872 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 873 | status_reg); |
c22fa3ac DB |
874 | /* REVISIT: some hardware needs 550+ usec to clear |
875 | * this bit; seems too long to spin routinely... | |
876 | */ | |
e6316565 | 877 | retval = handshake(ehci, status_reg, |
6307e096 | 878 | PORT_RESET, 0, 1000); |
1da177e4 LT |
879 | if (retval != 0) { |
880 | ehci_err (ehci, "port %d reset error %d\n", | |
881 | wIndex + 1, retval); | |
882 | goto error; | |
883 | } | |
884 | ||
885 | /* see what we found out */ | |
e6316565 AS |
886 | temp = check_reset_complete (ehci, wIndex, status_reg, |
887 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
888 | } |
889 | ||
eafe5b99 AS |
890 | if (!(temp & (PORT_RESUME|PORT_RESET))) |
891 | ehci->reset_done[wIndex] = 0; | |
892 | ||
57e06c11 AS |
893 | /* transfer dedicated ports to the companion hc */ |
894 | if ((temp & PORT_CONNECT) && | |
895 | test_bit(wIndex, &ehci->companion_ports)) { | |
896 | temp &= ~PORT_RWC_BITS; | |
897 | temp |= PORT_OWNER; | |
898 | ehci_writel(ehci, temp, status_reg); | |
899 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
900 | temp = ehci_readl(ehci, status_reg); | |
901 | } | |
902 | ||
625b5c9a AS |
903 | /* |
904 | * Even if OWNER is set, there's no harm letting khubd | |
905 | * see the wPortStatus values (they should all be 0 except | |
906 | * for PORT_POWER anyway). | |
907 | */ | |
908 | ||
909 | if (temp & PORT_CONNECT) { | |
749da5f8 | 910 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 911 | // status may be from integrated TT |
331ac6b2 AD |
912 | if (ehci->has_hostpc) { |
913 | temp1 = ehci_readl(ehci, hostpc_reg); | |
914 | status |= ehci_port_speed(ehci, temp1); | |
915 | } else | |
916 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 917 | } |
625b5c9a | 918 | if (temp & PORT_PE) |
749da5f8 | 919 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
920 | |
921 | /* maybe the port was unsuspended without our knowledge */ | |
922 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 923 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
924 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
925 | clear_bit(wIndex, &ehci->suspended_ports); | |
926 | ehci->reset_done[wIndex] = 0; | |
927 | if (temp & PORT_PE) | |
928 | set_bit(wIndex, &ehci->port_c_suspend); | |
929 | } | |
930 | ||
625b5c9a | 931 | if (temp & PORT_OC) |
749da5f8 | 932 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 933 | if (temp & PORT_RESET) |
749da5f8 | 934 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 935 | if (temp & PORT_POWER) |
749da5f8 | 936 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 937 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 938 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 939 | |
9776afc8 | 940 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
941 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
942 | #endif | |
943 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 944 | put_unaligned_le32(status, buf); |
1da177e4 LT |
945 | break; |
946 | case SetHubFeature: | |
947 | switch (wValue) { | |
948 | case C_HUB_LOCAL_POWER: | |
949 | case C_HUB_OVER_CURRENT: | |
950 | /* no hub-wide feature/status flags */ | |
951 | break; | |
952 | default: | |
953 | goto error; | |
954 | } | |
955 | break; | |
956 | case SetPortFeature: | |
f0d7f273 DB |
957 | selector = wIndex >> 8; |
958 | wIndex &= 0xff; | |
8d053c79 JW |
959 | if (unlikely(ehci->debug)) { |
960 | /* If the debug port is active any port | |
961 | * feature requests should get denied */ | |
962 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
963 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
964 | retval = -ENODEV; | |
965 | goto error_exit; | |
966 | } | |
967 | } | |
1da177e4 LT |
968 | if (!wIndex || wIndex > ports) |
969 | goto error; | |
970 | wIndex--; | |
e6316565 | 971 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
972 | if (temp & PORT_OWNER) |
973 | break; | |
974 | ||
10f6524a | 975 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
976 | switch (wValue) { |
977 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
978 | if (ehci->no_selective_suspend) |
979 | break; | |
1da177e4 LT |
980 | if ((temp & PORT_PE) == 0 |
981 | || (temp & PORT_RESET) != 0) | |
982 | goto error; | |
b9df7942 | 983 | |
331ac6b2 AD |
984 | /* After above check the port must be connected. |
985 | * Set appropriate bit thus could put phy into low power | |
986 | * mode if we have hostpc feature | |
987 | */ | |
b9df7942 AD |
988 | temp &= ~PORT_WKCONN_E; |
989 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
990 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
331ac6b2 | 991 | if (hostpc_reg) { |
b9df7942 | 992 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 993 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 994 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
995 | temp1 = ehci_readl(ehci, hostpc_reg); |
996 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
997 | hostpc_reg); | |
998 | temp1 = ehci_readl(ehci, hostpc_reg); | |
999 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1000 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1001 | "succeeded" : "failed"); | |
1002 | } | |
eafe5b99 | 1003 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1004 | break; |
1005 | case USB_PORT_FEAT_POWER: | |
1006 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 1007 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 1008 | status_reg); |
1da177e4 LT |
1009 | break; |
1010 | case USB_PORT_FEAT_RESET: | |
1011 | if (temp & PORT_RESUME) | |
1012 | goto error; | |
1013 | /* line status bits may report this as low speed, | |
1014 | * which can be fine if this root hub has a | |
1015 | * transaction translator built in. | |
1016 | */ | |
1017 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1018 | && !ehci_is_TDI(ehci) | |
1019 | && PORT_USB11 (temp)) { | |
1020 | ehci_dbg (ehci, | |
1021 | "port %d low speed --> companion\n", | |
1022 | wIndex + 1); | |
1023 | temp |= PORT_OWNER; | |
1024 | } else { | |
1025 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
1026 | temp |= PORT_RESET; | |
1027 | temp &= ~PORT_PE; | |
1028 | ||
1029 | /* | |
1030 | * caller must wait, then call GetPortStatus | |
1031 | * usb 2.0 spec says 50 ms resets on root | |
1032 | */ | |
1033 | ehci->reset_done [wIndex] = jiffies | |
1034 | + msecs_to_jiffies (50); | |
1035 | } | |
e6316565 | 1036 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1037 | break; |
f0d7f273 DB |
1038 | |
1039 | /* For downstream facing ports (these): one hub port is put | |
1040 | * into test mode according to USB2 11.24.2.13, then the hub | |
1041 | * must be reset (which for root hub now means rmmod+modprobe, | |
1042 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1043 | * about the EHCI-specific stuff. | |
1044 | */ | |
1045 | case USB_PORT_FEAT_TEST: | |
1046 | if (!selector || selector > 5) | |
1047 | goto error; | |
1048 | ehci_quiesce(ehci); | |
1049 | ehci_halt(ehci); | |
1050 | temp |= selector << 16; | |
e6316565 | 1051 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1052 | break; |
1053 | ||
1da177e4 LT |
1054 | default: |
1055 | goto error; | |
1056 | } | |
083522d7 | 1057 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1058 | break; |
1059 | ||
1060 | default: | |
1061 | error: | |
1062 | /* "stall" on error */ | |
1063 | retval = -EPIPE; | |
1064 | } | |
8d053c79 | 1065 | error_exit: |
1da177e4 LT |
1066 | spin_unlock_irqrestore (&ehci->lock, flags); |
1067 | return retval; | |
1068 | } | |
90da096e BR |
1069 | |
1070 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) | |
1071 | { | |
1072 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1073 | ||
1074 | if (ehci_is_TDI(ehci)) | |
1075 | return; | |
1076 | set_owner(ehci, --portnum, PORT_OWNER); | |
1077 | } | |
1078 | ||
3a31155c AS |
1079 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
1080 | { | |
1081 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1082 | u32 __iomem *reg; | |
1083 | ||
1084 | if (ehci_is_TDI(ehci)) | |
1085 | return 0; | |
1086 | reg = &ehci->regs->port_status[portnum - 1]; | |
1087 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1088 | } |