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 | /*-------------------------------------------------------------------------*/ | |
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 | ||
c4f34764 | 62 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
63 | port = HCS_N_PORTS(ehci->hcs_params); |
64 | while (port--) { | |
65 | if (test_bit(port, &ehci->owned_ports)) { | |
66 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 67 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
68 | |
69 | /* Port already owned by companion? */ | |
70 | if (status & PORT_OWNER) | |
71 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
72 | else if (test_bit(port, &ehci->companion_ports)) |
73 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
c4f34764 AS |
74 | else { |
75 | spin_unlock_irq(&ehci->lock); | |
383975d7 AS |
76 | ehci_hub_control(hcd, SetPortFeature, |
77 | USB_PORT_FEAT_RESET, port + 1, | |
78 | NULL, 0); | |
c4f34764 AS |
79 | spin_lock_irq(&ehci->lock); |
80 | } | |
383975d7 AS |
81 | } |
82 | } | |
c4f34764 | 83 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
84 | |
85 | if (!ehci->owned_ports) | |
86 | return; | |
87 | msleep(90); /* Wait for resets to complete */ | |
88 | ||
c4f34764 | 89 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
90 | port = HCS_N_PORTS(ehci->hcs_params); |
91 | while (port--) { | |
92 | if (test_bit(port, &ehci->owned_ports)) { | |
c4f34764 | 93 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
94 | ehci_hub_control(hcd, GetPortStatus, |
95 | 0, port + 1, | |
96 | (char *) &buf, sizeof(buf)); | |
c4f34764 | 97 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
98 | |
99 | /* The companion should now own the port, | |
100 | * but if something went wrong the port must not | |
101 | * remain enabled. | |
102 | */ | |
103 | reg = &ehci->regs->port_status[port]; | |
104 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
105 | if (status & PORT_OWNER) | |
106 | ehci_writel(ehci, status | PORT_CSC, reg); | |
107 | else { | |
108 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
109 | port + 1, status); | |
110 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
111 | } | |
112 | } | |
113 | } | |
114 | ||
115 | ehci->owned_ports = 0; | |
c4f34764 | 116 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
117 | } |
118 | ||
c5cf9212 | 119 | static int ehci_port_change(struct ehci_hcd *ehci) |
294d95f2 MG |
120 | { |
121 | int i = HCS_N_PORTS(ehci->hcs_params); | |
122 | ||
123 | /* First check if the controller indicates a change event */ | |
124 | ||
125 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) | |
126 | return 1; | |
127 | ||
128 | /* | |
129 | * Not all controllers appear to update this while going from D3 to D0, | |
130 | * so check the individual port status registers as well | |
131 | */ | |
132 | ||
133 | while (i--) | |
134 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) | |
135 | return 1; | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
c5cf9212 | 140 | static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 141 | bool suspending, bool do_wakeup) |
16032c4f AS |
142 | { |
143 | int port; | |
144 | u32 temp; | |
145 | ||
146 | /* If remote wakeup is enabled for the root hub but disabled | |
147 | * for the controller, we must adjust all the port wakeup flags | |
148 | * when the controller is suspended or resumed. In all other | |
149 | * cases they don't need to be changed. | |
150 | */ | |
4147200d | 151 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
152 | return; |
153 | ||
c4f34764 | 154 | spin_lock_irq(&ehci->lock); |
148fc55f | 155 | |
16032c4f AS |
156 | /* clear phy low-power mode before changing wakeup flags */ |
157 | if (ehci->has_hostpc) { | |
158 | port = HCS_N_PORTS(ehci->hcs_params); | |
159 | while (port--) { | |
a46af4eb | 160 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 161 | |
16032c4f AS |
162 | temp = ehci_readl(ehci, hostpc_reg); |
163 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
164 | } | |
c4f34764 | 165 | spin_unlock_irq(&ehci->lock); |
16032c4f | 166 | msleep(5); |
c4f34764 | 167 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
168 | } |
169 | ||
170 | port = HCS_N_PORTS(ehci->hcs_params); | |
171 | while (port--) { | |
172 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
173 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
174 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
175 | ||
176 | /* If we are suspending the controller, clear the flags. | |
177 | * If we are resuming the controller, set the wakeup flags. | |
178 | */ | |
179 | if (!suspending) { | |
180 | if (t1 & PORT_CONNECT) | |
181 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
182 | else | |
183 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
184 | } | |
185 | ehci_vdbg(ehci, "port %d, %08x -> %08x\n", | |
186 | port + 1, t1, t2); | |
187 | ehci_writel(ehci, t2, reg); | |
188 | } | |
189 | ||
190 | /* enter phy low-power mode again */ | |
191 | if (ehci->has_hostpc) { | |
192 | port = HCS_N_PORTS(ehci->hcs_params); | |
193 | while (port--) { | |
a46af4eb | 194 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 195 | |
16032c4f AS |
196 | temp = ehci_readl(ehci, hostpc_reg); |
197 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
198 | } | |
199 | } | |
ee0b9be8 AS |
200 | |
201 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 202 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 203 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f | 204 | |
c4f34764 | 205 | spin_unlock_irq(&ehci->lock); |
16032c4f AS |
206 | } |
207 | ||
0c0382e3 | 208 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
209 | { |
210 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
211 | int port; | |
8c03356a | 212 | int mask; |
16032c4f | 213 | int changed; |
1da177e4 | 214 | |
8c774fe8 AS |
215 | ehci_dbg(ehci, "suspend root hub\n"); |
216 | ||
1da177e4 LT |
217 | if (time_before (jiffies, ehci->next_statechange)) |
218 | msleep(5); | |
219 | ||
c4f34764 AS |
220 | /* stop the schedules */ |
221 | ehci_quiesce(ehci); | |
222 | ||
1da177e4 LT |
223 | spin_lock_irq (&ehci->lock); |
224 | ||
cec3a53c AS |
225 | /* Once the controller is stopped, port resumes that are already |
226 | * in progress won't complete. Hence if remote wakeup is enabled | |
227 | * for the root hub and any ports are in the middle of a resume or | |
228 | * remote wakeup, we must fail the suspend. | |
229 | */ | |
230 | if (hcd->self.root_hub->do_remote_wakeup) { | |
a448e4dc AS |
231 | if (ehci->resuming_ports) { |
232 | spin_unlock_irq(&ehci->lock); | |
233 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); | |
234 | return -EBUSY; | |
cec3a53c AS |
235 | } |
236 | } | |
237 | ||
8c03356a AS |
238 | /* Unlike other USB host controller types, EHCI doesn't have |
239 | * any notion of "global" or bus-wide suspend. The driver has | |
240 | * to manually suspend all the active unsuspended ports, and | |
241 | * then manually resume them in the bus_resume() routine. | |
242 | */ | |
243 | ehci->bus_suspended = 0; | |
383975d7 | 244 | ehci->owned_ports = 0; |
16032c4f | 245 | changed = 0; |
cec3a53c | 246 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
247 | while (port--) { |
248 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 249 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 250 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 251 | |
8c03356a | 252 | /* keep track of which ports we suspend */ |
383975d7 AS |
253 | if (t1 & PORT_OWNER) |
254 | set_bit(port, &ehci->owned_ports); | |
255 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 256 | t2 |= PORT_SUSPEND; |
8c03356a AS |
257 | set_bit(port, &ehci->bus_suspended); |
258 | } | |
259 | ||
16032c4f | 260 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
261 | if (hcd->self.root_hub->do_remote_wakeup) { |
262 | /* only enable appropriate wake bits, otherwise the | |
263 | * hardware can not go phy low power mode. If a race | |
264 | * condition happens here(connection change during bits | |
265 | * set), the port change detection will finally fix it. | |
266 | */ | |
16032c4f | 267 | if (t1 & PORT_CONNECT) |
331ac6b2 | 268 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 269 | else |
331ac6b2 | 270 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 271 | } |
1da177e4 LT |
272 | |
273 | if (t1 != t2) { | |
274 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
275 | port + 1, t1, t2); | |
083522d7 | 276 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
277 | changed = 1; |
278 | } | |
279 | } | |
331ac6b2 | 280 | |
16032c4f AS |
281 | if (changed && ehci->has_hostpc) { |
282 | spin_unlock_irq(&ehci->lock); | |
283 | msleep(5); /* 5 ms for HCD to enter low-power mode */ | |
284 | spin_lock_irq(&ehci->lock); | |
285 | ||
286 | port = HCS_N_PORTS(ehci->hcs_params); | |
287 | while (port--) { | |
a46af4eb | 288 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f AS |
289 | u32 t3; |
290 | ||
16032c4f AS |
291 | t3 = ehci_readl(ehci, hostpc_reg); |
292 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
293 | t3 = ehci_readl(ehci, hostpc_reg); | |
294 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
295 | port, (t3 & HOSTPC_PHCD) ? |
296 | "succeeded" : "failed"); | |
1da177e4 LT |
297 | } |
298 | } | |
c4f34764 | 299 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 300 | |
cd930c93 AS |
301 | /* Apparently some devices need a >= 1-uframe delay here */ |
302 | if (ehci->bus_suspended) | |
303 | udelay(150); | |
304 | ||
1da177e4 LT |
305 | /* turn off now-idle HC */ |
306 | ehci_halt (ehci); | |
c4f34764 AS |
307 | |
308 | spin_lock_irq(&ehci->lock); | |
e8799906 | 309 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1da177e4 | 310 | |
3c273a05 | 311 | end_unlink_async(ehci); |
32830f20 | 312 | unlink_empty_async(ehci); |
df202255 | 313 | ehci_handle_intr_unlinks(ehci); |
55934eb3 | 314 | end_free_itds(ehci); |
cdc647a9 | 315 | |
8c03356a AS |
316 | /* allow remote wakeup */ |
317 | mask = INTR_MASK; | |
58a97ffe | 318 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 319 | mask &= ~STS_PCD; |
083522d7 BH |
320 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
321 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 322 | |
1da177e4 | 323 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
d58b4bcc AS |
324 | ehci->enabled_hrtimer_events = 0; |
325 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
1da177e4 | 326 | spin_unlock_irq (&ehci->lock); |
015798b2 | 327 | |
d58b4bcc | 328 | hrtimer_cancel(&ehci->hrtimer); |
1da177e4 LT |
329 | return 0; |
330 | } | |
331 | ||
332 | ||
333 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 334 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
335 | { |
336 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
337 | u32 temp; | |
383975d7 | 338 | u32 power_okay; |
1da177e4 | 339 | int i; |
d0f2fb25 | 340 | unsigned long resume_needed = 0; |
1da177e4 LT |
341 | |
342 | if (time_before (jiffies, ehci->next_statechange)) | |
343 | msleep(5); | |
344 | spin_lock_irq (&ehci->lock); | |
541c7d43 | 345 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab AS |
346 | spin_unlock_irq(&ehci->lock); |
347 | return -ESHUTDOWN; | |
348 | } | |
1da177e4 | 349 | |
ad45f1dc | 350 | if (unlikely(ehci->debug)) { |
872d3599 | 351 | if (!dbgp_reset_prep()) |
ad45f1dc JW |
352 | ehci->debug = NULL; |
353 | else | |
354 | dbgp_external_startup(); | |
355 | } | |
356 | ||
f03c17fc DB |
357 | /* Ideally and we've got a real resume here, and no port's power |
358 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
359 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
360 | * the last user of the controller, not reset/pm hardware keeping | |
361 | * state we gave to it. | |
362 | */ | |
383975d7 AS |
363 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
364 | ehci_dbg(ehci, "resume root hub%s\n", | |
365 | power_okay ? "" : " after power loss"); | |
f03c17fc | 366 | |
8c03356a AS |
367 | /* at least some APM implementations will try to deliver |
368 | * IRQs right away, so delay them until we're ready. | |
369 | */ | |
083522d7 | 370 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
371 | |
372 | /* re-init operational registers */ | |
083522d7 BH |
373 | ehci_writel(ehci, 0, &ehci->regs->segment); |
374 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
375 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
376 | |
377 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
3d9545cc | 378 | ehci->command |= CMD_RUN; |
083522d7 | 379 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
e8799906 | 380 | ehci->rh_state = EHCI_RH_RUNNING; |
1da177e4 | 381 | |
e198a314 AS |
382 | /* Some controller/firmware combinations need a delay during which |
383 | * they set up the port statuses. See Bugzilla #8190. */ | |
3a4e72cb VP |
384 | spin_unlock_irq(&ehci->lock); |
385 | msleep(8); | |
386 | spin_lock_irq(&ehci->lock); | |
e198a314 | 387 | |
16032c4f AS |
388 | /* clear phy low-power mode before resume */ |
389 | if (ehci->bus_suspended && ehci->has_hostpc) { | |
390 | i = HCS_N_PORTS(ehci->hcs_params); | |
391 | while (i--) { | |
392 | if (test_bit(i, &ehci->bus_suspended)) { | |
a46af4eb AS |
393 | u32 __iomem *hostpc_reg = |
394 | &ehci->regs->hostpc[i]; | |
16032c4f | 395 | |
16032c4f AS |
396 | temp = ehci_readl(ehci, hostpc_reg); |
397 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
398 | hostpc_reg); | |
399 | } | |
400 | } | |
401 | spin_unlock_irq(&ehci->lock); | |
402 | msleep(5); | |
403 | spin_lock_irq(&ehci->lock); | |
404 | } | |
405 | ||
8c03356a | 406 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
407 | i = HCS_N_PORTS (ehci->hcs_params); |
408 | while (i--) { | |
083522d7 | 409 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 410 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 411 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 412 | (temp & PORT_SUSPEND)) { |
1da177e4 | 413 | temp |= PORT_RESUME; |
d0f2fb25 | 414 | set_bit(i, &resume_needed); |
3a4e72cb | 415 | } |
083522d7 | 416 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 417 | } |
3a4e72cb VP |
418 | |
419 | /* msleep for 20ms only if code is trying to resume port */ | |
420 | if (resume_needed) { | |
421 | spin_unlock_irq(&ehci->lock); | |
422 | msleep(20); | |
423 | spin_lock_irq(&ehci->lock); | |
424 | } | |
425 | ||
1da177e4 | 426 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 427 | while (i--) { |
083522d7 | 428 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
d0f2fb25 | 429 | if (test_bit(i, &resume_needed)) { |
8c03356a | 430 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); |
083522d7 | 431 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
432 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
433 | } | |
1da177e4 | 434 | } |
1da177e4 LT |
435 | |
436 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
c4f34764 AS |
437 | spin_unlock_irq(&ehci->lock); |
438 | ||
439 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
440 | |
441 | /* Now we can safely re-enable irqs */ | |
083522d7 | 442 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
15be105b | 443 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
1da177e4 | 444 | |
1da177e4 LT |
445 | return 0; |
446 | } | |
447 | ||
448 | #else | |
449 | ||
0c0382e3 AS |
450 | #define ehci_bus_suspend NULL |
451 | #define ehci_bus_resume NULL | |
1da177e4 LT |
452 | |
453 | #endif /* CONFIG_PM */ | |
454 | ||
57e06c11 AS |
455 | /*-------------------------------------------------------------------------*/ |
456 | ||
57e06c11 | 457 | /* |
90da096e | 458 | * Sets the owner of a port |
57e06c11 | 459 | */ |
90da096e | 460 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 461 | { |
57e06c11 AS |
462 | u32 __iomem *status_reg; |
463 | u32 port_status; | |
90da096e | 464 | int try; |
57e06c11 | 465 | |
90da096e | 466 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
467 | |
468 | /* | |
469 | * The controller won't set the OWNER bit if the port is | |
470 | * enabled, so this loop will sometimes require at least two | |
471 | * iterations: one to disable the port and one to set OWNER. | |
472 | */ | |
57e06c11 AS |
473 | for (try = 4; try > 0; --try) { |
474 | spin_lock_irq(&ehci->lock); | |
475 | port_status = ehci_readl(ehci, status_reg); | |
476 | if ((port_status & PORT_OWNER) == new_owner | |
477 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
478 | == 0) | |
479 | try = 0; | |
480 | else { | |
481 | port_status ^= PORT_OWNER; | |
482 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
483 | ehci_writel(ehci, port_status, status_reg); | |
484 | } | |
485 | spin_unlock_irq(&ehci->lock); | |
486 | if (try > 1) | |
487 | msleep(5); | |
488 | } | |
90da096e BR |
489 | } |
490 | ||
1da177e4 LT |
491 | /*-------------------------------------------------------------------------*/ |
492 | ||
493 | static int check_reset_complete ( | |
494 | struct ehci_hcd *ehci, | |
495 | int index, | |
e6316565 | 496 | u32 __iomem *status_reg, |
1da177e4 LT |
497 | int port_status |
498 | ) { | |
cd4cdc93 | 499 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 500 | return port_status; |
1da177e4 LT |
501 | |
502 | /* if reset finished and it's still not enabled -- handoff */ | |
503 | if (!(port_status & PORT_PE)) { | |
504 | ||
505 | /* with integrated TT, there's nobody to hand it to! */ | |
506 | if (ehci_is_TDI(ehci)) { | |
507 | ehci_dbg (ehci, | |
508 | "Failed to enable port %d on root hub TT\n", | |
509 | index+1); | |
510 | return port_status; | |
511 | } | |
512 | ||
513 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
514 | index + 1); | |
515 | ||
516 | // what happens if HCS_N_CC(params) == 0 ? | |
517 | port_status |= PORT_OWNER; | |
10f6524a | 518 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 519 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 520 | |
796bcae7 VB |
521 | /* ensure 440EPX ohci controller state is operational */ |
522 | if (ehci->has_amcc_usb23) | |
523 | set_ohci_hcfs(ehci, 1); | |
524 | } else { | |
0ca7eb23 PC |
525 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
526 | index + 1); | |
796bcae7 VB |
527 | /* ensure 440EPx ohci controller state is suspended */ |
528 | if (ehci->has_amcc_usb23) | |
529 | set_ohci_hcfs(ehci, 0); | |
530 | } | |
1da177e4 LT |
531 | |
532 | return port_status; | |
533 | } | |
534 | ||
535 | /*-------------------------------------------------------------------------*/ | |
536 | ||
537 | ||
538 | /* build "status change" packet (one or two bytes) from HC registers */ | |
539 | ||
540 | static int | |
541 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
542 | { | |
543 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
a448e4dc | 544 | u32 temp, status; |
93f1a47c | 545 | u32 mask; |
1da177e4 LT |
546 | int ports, i, retval = 1; |
547 | unsigned long flags; | |
5a9cdf33 | 548 | u32 ppcd = 0; |
1da177e4 | 549 | |
1da177e4 LT |
550 | /* init status to no-changes */ |
551 | buf [0] = 0; | |
552 | ports = HCS_N_PORTS (ehci->hcs_params); | |
553 | if (ports > 7) { | |
554 | buf [1] = 0; | |
555 | retval++; | |
556 | } | |
53bd6a60 | 557 | |
a448e4dc AS |
558 | /* Inform the core about resumes-in-progress by returning |
559 | * a non-zero value even if there are no status changes. | |
560 | */ | |
561 | status = ehci->resuming_ports; | |
562 | ||
93f1a47c DB |
563 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
564 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 565 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
566 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
567 | * PORT_POWER; that's surprising, but maybe within-spec. | |
568 | */ | |
569 | if (!ignore_oc) | |
570 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
571 | else | |
572 | mask = PORT_CSC | PORT_PEC; | |
573 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
574 | ||
1da177e4 LT |
575 | /* no hub change reports (bit 0) for now (power, ...) */ |
576 | ||
577 | /* port N changes (bit N)? */ | |
578 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
579 | |
580 | /* get per-port change detect bits */ | |
581 | if (ehci->has_ppcd) | |
582 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
583 | ||
1da177e4 | 584 | for (i = 0; i < ports; i++) { |
5a9cdf33 AD |
585 | /* leverage per-port change bits feature */ |
586 | if (ehci->has_ppcd && !(ppcd & (1 << i))) | |
587 | continue; | |
083522d7 | 588 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
589 | |
590 | /* | |
591 | * Return status information even for ports with OWNER set. | |
592 | * Otherwise khubd wouldn't see the disconnect event when a | |
593 | * high-speed device is switched over to the companion | |
594 | * controller by the user. | |
595 | */ | |
596 | ||
eafe5b99 AS |
597 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
598 | || (ehci->reset_done[i] && time_after_eq( | |
599 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
600 | if (i < 7) |
601 | buf [0] |= 1 << (i + 1); | |
602 | else | |
603 | buf [1] |= 1 << (i - 7); | |
604 | status = STS_PCD; | |
605 | } | |
606 | } | |
607 | /* FIXME autosuspend idle root hubs */ | |
608 | spin_unlock_irqrestore (&ehci->lock, flags); | |
609 | return status ? retval : 0; | |
610 | } | |
611 | ||
612 | /*-------------------------------------------------------------------------*/ | |
613 | ||
614 | static void | |
615 | ehci_hub_descriptor ( | |
616 | struct ehci_hcd *ehci, | |
617 | struct usb_hub_descriptor *desc | |
618 | ) { | |
619 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
620 | u16 temp; | |
621 | ||
622 | desc->bDescriptorType = 0x29; | |
623 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
624 | desc->bHubContrCurrent = 0; | |
625 | ||
626 | desc->bNbrPorts = ports; | |
627 | temp = 1 + (ports / 8); | |
628 | desc->bDescLength = 7 + 2 * temp; | |
629 | ||
630 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
631 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
632 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 LT |
633 | |
634 | temp = 0x0008; /* per-port overcurrent reporting */ | |
635 | if (HCS_PPC (ehci->hcs_params)) | |
636 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
637 | else |
638 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
639 | #if 0 |
640 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
641 | if (HCS_INDICATOR (ehci->hcs_params)) | |
642 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
643 | #endif | |
fd05e720 | 644 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
645 | } |
646 | ||
647 | /*-------------------------------------------------------------------------*/ | |
648 | ||
1da177e4 LT |
649 | static int ehci_hub_control ( |
650 | struct usb_hcd *hcd, | |
651 | u16 typeReq, | |
652 | u16 wValue, | |
653 | u16 wIndex, | |
654 | char *buf, | |
655 | u16 wLength | |
656 | ) { | |
657 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
658 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
659 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
660 | (wIndex & 0xff) - 1]; | |
a46af4eb | 661 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1]; |
331ac6b2 | 662 | u32 temp, temp1, status; |
1da177e4 LT |
663 | unsigned long flags; |
664 | int retval = 0; | |
f0d7f273 | 665 | unsigned selector; |
1da177e4 LT |
666 | |
667 | /* | |
668 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
669 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
670 | * (track current state ourselves) ... blink for diagnostics, | |
671 | * power, "this is the one", etc. EHCI spec supports this. | |
672 | */ | |
673 | ||
674 | spin_lock_irqsave (&ehci->lock, flags); | |
675 | switch (typeReq) { | |
676 | case ClearHubFeature: | |
677 | switch (wValue) { | |
678 | case C_HUB_LOCAL_POWER: | |
679 | case C_HUB_OVER_CURRENT: | |
680 | /* no hub-wide feature/status flags */ | |
681 | break; | |
682 | default: | |
683 | goto error; | |
684 | } | |
685 | break; | |
686 | case ClearPortFeature: | |
687 | if (!wIndex || wIndex > ports) | |
688 | goto error; | |
689 | wIndex--; | |
e6316565 | 690 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 691 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
692 | |
693 | /* | |
694 | * Even if OWNER is set, so the port is owned by the | |
695 | * companion controller, khubd needs to be able to clear | |
696 | * the port-change status bits (especially | |
749da5f8 | 697 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 698 | */ |
1da177e4 LT |
699 | |
700 | switch (wValue) { | |
701 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 702 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
703 | break; |
704 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 705 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
706 | break; |
707 | case USB_PORT_FEAT_SUSPEND: | |
708 | if (temp & PORT_RESET) | |
709 | goto error; | |
f8aeb3bb DB |
710 | if (ehci->no_selective_suspend) |
711 | break; | |
83722bc9 AG |
712 | #ifdef CONFIG_USB_OTG |
713 | if ((hcd->self.otg_port == (wIndex + 1)) | |
714 | && hcd->self.b_hnp_enable) { | |
c2e935a7 | 715 | otg_start_hnp(hcd->phy->otg); |
83722bc9 AG |
716 | break; |
717 | } | |
718 | #endif | |
16032c4f AS |
719 | if (!(temp & PORT_SUSPEND)) |
720 | break; | |
721 | if ((temp & PORT_PE) == 0) | |
722 | goto error; | |
723 | ||
724 | /* clear phy low-power mode before resume */ | |
a46af4eb | 725 | if (ehci->has_hostpc) { |
16032c4f AS |
726 | temp1 = ehci_readl(ehci, hostpc_reg); |
727 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 728 | hostpc_reg); |
16032c4f AS |
729 | spin_unlock_irqrestore(&ehci->lock, flags); |
730 | msleep(5);/* wait to leave low-power mode */ | |
731 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 732 | } |
16032c4f | 733 | /* resume signaling for 20 msec */ |
6d5f89c7 | 734 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
735 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
736 | ehci->reset_done[wIndex] = jiffies | |
737 | + msecs_to_jiffies(20); | |
1da177e4 LT |
738 | break; |
739 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 740 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
741 | break; |
742 | case USB_PORT_FEAT_POWER: | |
743 | if (HCS_PPC (ehci->hcs_params)) | |
6d5f89c7 SW |
744 | ehci_writel(ehci, temp & ~PORT_POWER, |
745 | status_reg); | |
1da177e4 LT |
746 | break; |
747 | case USB_PORT_FEAT_C_CONNECTION: | |
48f24970 AD |
748 | if (ehci->has_lpm) { |
749 | /* clear PORTSC bits on disconnect */ | |
750 | temp &= ~PORT_LPM; | |
751 | temp &= ~PORT_DEV_ADDR; | |
752 | } | |
6d5f89c7 | 753 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
754 | break; |
755 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 756 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
757 | break; |
758 | case USB_PORT_FEAT_C_RESET: | |
759 | /* GetPortStatus clears reset */ | |
760 | break; | |
761 | default: | |
762 | goto error; | |
763 | } | |
083522d7 | 764 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
765 | break; |
766 | case GetHubDescriptor: | |
767 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
768 | buf); | |
769 | break; | |
770 | case GetHubStatus: | |
771 | /* no hub-wide feature/status flags */ | |
772 | memset (buf, 0, 4); | |
773 | //cpu_to_le32s ((u32 *) buf); | |
774 | break; | |
775 | case GetPortStatus: | |
776 | if (!wIndex || wIndex > ports) | |
777 | goto error; | |
778 | wIndex--; | |
779 | status = 0; | |
e6316565 | 780 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
781 | |
782 | // wPortChange bits | |
783 | if (temp & PORT_CSC) | |
749da5f8 | 784 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 785 | if (temp & PORT_PEC) |
749da5f8 | 786 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
787 | |
788 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 789 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 790 | |
756aa6b3 CE |
791 | /* |
792 | * Hubs should disable port power on over-current. | |
793 | * However, not all EHCI implementations do this | |
794 | * automatically, even if they _do_ support per-port | |
795 | * power switching; they're allowed to just limit the | |
796 | * current. khubd will turn the power back on. | |
797 | */ | |
81463c1d | 798 | if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) { |
756aa6b3 CE |
799 | ehci_writel(ehci, |
800 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
801 | status_reg); | |
81463c1d | 802 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
803 | } |
804 | } | |
805 | ||
1da177e4 | 806 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
807 | if (temp & PORT_RESUME) { |
808 | ||
809 | /* Remote Wakeup received? */ | |
810 | if (!ehci->reset_done[wIndex]) { | |
811 | /* resume signaling for 20 msec */ | |
812 | ehci->reset_done[wIndex] = jiffies | |
813 | + msecs_to_jiffies(20); | |
814 | /* check the port again */ | |
815 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
816 | ehci->reset_done[wIndex]); | |
817 | } | |
1da177e4 | 818 | |
629e4427 AS |
819 | /* resume completed? */ |
820 | else if (time_after_eq(jiffies, | |
821 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 822 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 823 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 AS |
824 | ehci->reset_done[wIndex] = 0; |
825 | ||
826 | /* stop resume signaling */ | |
827 | temp = ehci_readl(ehci, status_reg); | |
828 | ehci_writel(ehci, | |
e6316565 AS |
829 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
830 | status_reg); | |
a448e4dc | 831 | clear_bit(wIndex, &ehci->resuming_ports); |
629e4427 | 832 | retval = handshake(ehci, status_reg, |
083522d7 | 833 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
834 | if (retval != 0) { |
835 | ehci_err(ehci, | |
836 | "port %d resume error %d\n", | |
837 | wIndex + 1, retval); | |
838 | goto error; | |
839 | } | |
840 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 841 | } |
1da177e4 LT |
842 | } |
843 | ||
844 | /* whoever resets must GetPortStatus to complete it!! */ | |
845 | if ((temp & PORT_RESET) | |
629e4427 AS |
846 | && time_after_eq(jiffies, |
847 | ehci->reset_done[wIndex])) { | |
749da5f8 | 848 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 | 849 | ehci->reset_done [wIndex] = 0; |
a448e4dc | 850 | clear_bit(wIndex, &ehci->resuming_ports); |
1da177e4 LT |
851 | |
852 | /* force reset to complete */ | |
083522d7 | 853 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 854 | status_reg); |
c22fa3ac DB |
855 | /* REVISIT: some hardware needs 550+ usec to clear |
856 | * this bit; seems too long to spin routinely... | |
857 | */ | |
e6316565 | 858 | retval = handshake(ehci, status_reg, |
6307e096 | 859 | PORT_RESET, 0, 1000); |
1da177e4 LT |
860 | if (retval != 0) { |
861 | ehci_err (ehci, "port %d reset error %d\n", | |
862 | wIndex + 1, retval); | |
863 | goto error; | |
864 | } | |
865 | ||
866 | /* see what we found out */ | |
e6316565 AS |
867 | temp = check_reset_complete (ehci, wIndex, status_reg, |
868 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
869 | } |
870 | ||
a448e4dc | 871 | if (!(temp & (PORT_RESUME|PORT_RESET))) { |
eafe5b99 | 872 | ehci->reset_done[wIndex] = 0; |
a448e4dc AS |
873 | clear_bit(wIndex, &ehci->resuming_ports); |
874 | } | |
eafe5b99 | 875 | |
57e06c11 AS |
876 | /* transfer dedicated ports to the companion hc */ |
877 | if ((temp & PORT_CONNECT) && | |
878 | test_bit(wIndex, &ehci->companion_ports)) { | |
879 | temp &= ~PORT_RWC_BITS; | |
880 | temp |= PORT_OWNER; | |
881 | ehci_writel(ehci, temp, status_reg); | |
882 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
883 | temp = ehci_readl(ehci, status_reg); | |
884 | } | |
885 | ||
625b5c9a AS |
886 | /* |
887 | * Even if OWNER is set, there's no harm letting khubd | |
888 | * see the wPortStatus values (they should all be 0 except | |
889 | * for PORT_POWER anyway). | |
890 | */ | |
891 | ||
892 | if (temp & PORT_CONNECT) { | |
749da5f8 | 893 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 894 | // status may be from integrated TT |
331ac6b2 AD |
895 | if (ehci->has_hostpc) { |
896 | temp1 = ehci_readl(ehci, hostpc_reg); | |
897 | status |= ehci_port_speed(ehci, temp1); | |
898 | } else | |
899 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 900 | } |
625b5c9a | 901 | if (temp & PORT_PE) |
749da5f8 | 902 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
903 | |
904 | /* maybe the port was unsuspended without our knowledge */ | |
905 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 906 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
907 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
908 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 909 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
910 | ehci->reset_done[wIndex] = 0; |
911 | if (temp & PORT_PE) | |
912 | set_bit(wIndex, &ehci->port_c_suspend); | |
913 | } | |
914 | ||
625b5c9a | 915 | if (temp & PORT_OC) |
749da5f8 | 916 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 917 | if (temp & PORT_RESET) |
749da5f8 | 918 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 919 | if (temp & PORT_POWER) |
749da5f8 | 920 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 921 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 922 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 923 | |
9776afc8 | 924 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
925 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
926 | #endif | |
927 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 928 | put_unaligned_le32(status, buf); |
1da177e4 LT |
929 | break; |
930 | case SetHubFeature: | |
931 | switch (wValue) { | |
932 | case C_HUB_LOCAL_POWER: | |
933 | case C_HUB_OVER_CURRENT: | |
934 | /* no hub-wide feature/status flags */ | |
935 | break; | |
936 | default: | |
937 | goto error; | |
938 | } | |
939 | break; | |
940 | case SetPortFeature: | |
f0d7f273 DB |
941 | selector = wIndex >> 8; |
942 | wIndex &= 0xff; | |
8d053c79 JW |
943 | if (unlikely(ehci->debug)) { |
944 | /* If the debug port is active any port | |
945 | * feature requests should get denied */ | |
946 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
947 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
948 | retval = -ENODEV; | |
949 | goto error_exit; | |
950 | } | |
951 | } | |
1da177e4 LT |
952 | if (!wIndex || wIndex > ports) |
953 | goto error; | |
954 | wIndex--; | |
e6316565 | 955 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
956 | if (temp & PORT_OWNER) |
957 | break; | |
958 | ||
10f6524a | 959 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
960 | switch (wValue) { |
961 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
962 | if (ehci->no_selective_suspend) |
963 | break; | |
1da177e4 LT |
964 | if ((temp & PORT_PE) == 0 |
965 | || (temp & PORT_RESET) != 0) | |
966 | goto error; | |
b9df7942 | 967 | |
331ac6b2 AD |
968 | /* After above check the port must be connected. |
969 | * Set appropriate bit thus could put phy into low power | |
970 | * mode if we have hostpc feature | |
971 | */ | |
b9df7942 AD |
972 | temp &= ~PORT_WKCONN_E; |
973 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
974 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
a46af4eb | 975 | if (ehci->has_hostpc) { |
b9df7942 | 976 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 977 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 978 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
979 | temp1 = ehci_readl(ehci, hostpc_reg); |
980 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
981 | hostpc_reg); | |
982 | temp1 = ehci_readl(ehci, hostpc_reg); | |
983 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
984 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
985 | "succeeded" : "failed"); | |
986 | } | |
eafe5b99 | 987 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
988 | break; |
989 | case USB_PORT_FEAT_POWER: | |
990 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 991 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 992 | status_reg); |
1da177e4 LT |
993 | break; |
994 | case USB_PORT_FEAT_RESET: | |
995 | if (temp & PORT_RESUME) | |
996 | goto error; | |
997 | /* line status bits may report this as low speed, | |
998 | * which can be fine if this root hub has a | |
999 | * transaction translator built in. | |
1000 | */ | |
1001 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1002 | && !ehci_is_TDI(ehci) | |
1003 | && PORT_USB11 (temp)) { | |
1004 | ehci_dbg (ehci, | |
1005 | "port %d low speed --> companion\n", | |
1006 | wIndex + 1); | |
1007 | temp |= PORT_OWNER; | |
1008 | } else { | |
1009 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
1010 | temp |= PORT_RESET; | |
1011 | temp &= ~PORT_PE; | |
1012 | ||
1013 | /* | |
1014 | * caller must wait, then call GetPortStatus | |
1015 | * usb 2.0 spec says 50 ms resets on root | |
1016 | */ | |
1017 | ehci->reset_done [wIndex] = jiffies | |
1018 | + msecs_to_jiffies (50); | |
1019 | } | |
e6316565 | 1020 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1021 | break; |
f0d7f273 DB |
1022 | |
1023 | /* For downstream facing ports (these): one hub port is put | |
1024 | * into test mode according to USB2 11.24.2.13, then the hub | |
1025 | * must be reset (which for root hub now means rmmod+modprobe, | |
1026 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1027 | * about the EHCI-specific stuff. | |
1028 | */ | |
1029 | case USB_PORT_FEAT_TEST: | |
1030 | if (!selector || selector > 5) | |
1031 | goto error; | |
c4f34764 | 1032 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1033 | ehci_quiesce(ehci); |
c4f34764 | 1034 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
1035 | |
1036 | /* Put all enabled ports into suspend */ | |
1037 | while (ports--) { | |
1038 | u32 __iomem *sreg = | |
1039 | &ehci->regs->port_status[ports]; | |
1040 | ||
1041 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; | |
1042 | if (temp & PORT_PE) | |
1043 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1044 | sreg); | |
1045 | } | |
c4f34764 AS |
1046 | |
1047 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1048 | ehci_halt(ehci); |
c4f34764 AS |
1049 | spin_lock_irqsave(&ehci->lock, flags); |
1050 | ||
77636c86 | 1051 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1052 | temp |= selector << 16; |
e6316565 | 1053 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1054 | break; |
1055 | ||
1da177e4 LT |
1056 | default: |
1057 | goto error; | |
1058 | } | |
083522d7 | 1059 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1060 | break; |
1061 | ||
1062 | default: | |
1063 | error: | |
1064 | /* "stall" on error */ | |
1065 | retval = -EPIPE; | |
1066 | } | |
8d053c79 | 1067 | error_exit: |
1da177e4 LT |
1068 | spin_unlock_irqrestore (&ehci->lock, flags); |
1069 | return retval; | |
1070 | } | |
90da096e | 1071 | |
5407a3c3 FB |
1072 | static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd, |
1073 | int portnum) | |
90da096e BR |
1074 | { |
1075 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1076 | ||
1077 | if (ehci_is_TDI(ehci)) | |
1078 | return; | |
1079 | set_owner(ehci, --portnum, PORT_OWNER); | |
1080 | } | |
1081 | ||
5407a3c3 FB |
1082 | static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd, |
1083 | int portnum) | |
3a31155c AS |
1084 | { |
1085 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1086 | u32 __iomem *reg; | |
1087 | ||
1088 | if (ehci_is_TDI(ehci)) | |
1089 | return 0; | |
1090 | reg = &ehci->regs->port_status[portnum - 1]; | |
1091 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1092 | } |