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 | ||
9b790915 JW |
45 | static int persist_enabled_on_companion(struct usb_device *udev, void *unused) |
46 | { | |
47 | return !udev->maxchild && udev->persist_enabled && | |
48 | udev->bus->root_hub->speed < USB_SPEED_HIGH; | |
49 | } | |
50 | ||
383975d7 AS |
51 | /* After a power loss, ports that were owned by the companion must be |
52 | * reset so that the companion can still own them. | |
53 | */ | |
54 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
55 | { | |
56 | u32 __iomem *reg; | |
57 | u32 status; | |
58 | int port; | |
59 | __le32 buf; | |
60 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
61 | ||
62 | if (!ehci->owned_ports) | |
63 | return; | |
64 | ||
9b790915 JW |
65 | /* |
66 | * USB 1.1 devices are mostly HIDs, which don't need to persist across | |
67 | * suspends. If we ensure that none of our companion's devices have | |
68 | * persist_enabled (by looking through all USB 1.1 buses in the system), | |
69 | * we can skip this and avoid slowing resume down. Devices without | |
70 | * persist will just get reenumerated shortly after resume anyway. | |
71 | */ | |
72 | if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) | |
73 | return; | |
74 | ||
c73cee71 AS |
75 | /* Make sure the ports are powered */ |
76 | port = HCS_N_PORTS(ehci->hcs_params); | |
77 | while (port--) { | |
78 | if (test_bit(port, &ehci->owned_ports)) { | |
79 | reg = &ehci->regs->port_status[port]; | |
80 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
81 | if (!(status & PORT_POWER)) { | |
82 | status |= PORT_POWER; | |
83 | ehci_writel(ehci, status, reg); | |
84 | } | |
85 | } | |
86 | } | |
87 | ||
383975d7 AS |
88 | /* Give the connections some time to appear */ |
89 | msleep(20); | |
90 | ||
c4f34764 | 91 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
92 | port = HCS_N_PORTS(ehci->hcs_params); |
93 | while (port--) { | |
94 | if (test_bit(port, &ehci->owned_ports)) { | |
95 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 96 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
97 | |
98 | /* Port already owned by companion? */ | |
99 | if (status & PORT_OWNER) | |
100 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
101 | else if (test_bit(port, &ehci->companion_ports)) |
102 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
c4f34764 AS |
103 | else { |
104 | spin_unlock_irq(&ehci->lock); | |
383975d7 AS |
105 | ehci_hub_control(hcd, SetPortFeature, |
106 | USB_PORT_FEAT_RESET, port + 1, | |
107 | NULL, 0); | |
c4f34764 AS |
108 | spin_lock_irq(&ehci->lock); |
109 | } | |
383975d7 AS |
110 | } |
111 | } | |
c4f34764 | 112 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
113 | |
114 | if (!ehci->owned_ports) | |
115 | return; | |
116 | msleep(90); /* Wait for resets to complete */ | |
117 | ||
c4f34764 | 118 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
119 | port = HCS_N_PORTS(ehci->hcs_params); |
120 | while (port--) { | |
121 | if (test_bit(port, &ehci->owned_ports)) { | |
c4f34764 | 122 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
123 | ehci_hub_control(hcd, GetPortStatus, |
124 | 0, port + 1, | |
125 | (char *) &buf, sizeof(buf)); | |
c4f34764 | 126 | spin_lock_irq(&ehci->lock); |
383975d7 AS |
127 | |
128 | /* The companion should now own the port, | |
129 | * but if something went wrong the port must not | |
130 | * remain enabled. | |
131 | */ | |
132 | reg = &ehci->regs->port_status[port]; | |
133 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
134 | if (status & PORT_OWNER) | |
135 | ehci_writel(ehci, status | PORT_CSC, reg); | |
136 | else { | |
137 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
138 | port + 1, status); | |
139 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
140 | } | |
141 | } | |
142 | } | |
143 | ||
144 | ehci->owned_ports = 0; | |
c4f34764 | 145 | spin_unlock_irq(&ehci->lock); |
383975d7 AS |
146 | } |
147 | ||
c5cf9212 | 148 | static int ehci_port_change(struct ehci_hcd *ehci) |
294d95f2 MG |
149 | { |
150 | int i = HCS_N_PORTS(ehci->hcs_params); | |
151 | ||
152 | /* First check if the controller indicates a change event */ | |
153 | ||
154 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) | |
155 | return 1; | |
156 | ||
157 | /* | |
158 | * Not all controllers appear to update this while going from D3 to D0, | |
159 | * so check the individual port status registers as well | |
160 | */ | |
161 | ||
162 | while (i--) | |
163 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) | |
164 | return 1; | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
c5cf9212 | 169 | static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
4147200d | 170 | bool suspending, bool do_wakeup) |
16032c4f AS |
171 | { |
172 | int port; | |
173 | u32 temp; | |
174 | ||
175 | /* If remote wakeup is enabled for the root hub but disabled | |
176 | * for the controller, we must adjust all the port wakeup flags | |
177 | * when the controller is suspended or resumed. In all other | |
178 | * cases they don't need to be changed. | |
179 | */ | |
4147200d | 180 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
16032c4f AS |
181 | return; |
182 | ||
c4f34764 | 183 | spin_lock_irq(&ehci->lock); |
148fc55f | 184 | |
16032c4f | 185 | /* clear phy low-power mode before changing wakeup flags */ |
2cdcec4f | 186 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
187 | port = HCS_N_PORTS(ehci->hcs_params); |
188 | while (port--) { | |
a46af4eb | 189 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 190 | |
16032c4f AS |
191 | temp = ehci_readl(ehci, hostpc_reg); |
192 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); | |
193 | } | |
c4f34764 | 194 | spin_unlock_irq(&ehci->lock); |
16032c4f | 195 | msleep(5); |
c4f34764 | 196 | spin_lock_irq(&ehci->lock); |
16032c4f AS |
197 | } |
198 | ||
199 | port = HCS_N_PORTS(ehci->hcs_params); | |
200 | while (port--) { | |
201 | u32 __iomem *reg = &ehci->regs->port_status[port]; | |
202 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
203 | u32 t2 = t1 & ~PORT_WAKE_BITS; | |
204 | ||
205 | /* If we are suspending the controller, clear the flags. | |
206 | * If we are resuming the controller, set the wakeup flags. | |
207 | */ | |
208 | if (!suspending) { | |
209 | if (t1 & PORT_CONNECT) | |
210 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
211 | else | |
212 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
213 | } | |
16032c4f AS |
214 | ehci_writel(ehci, t2, reg); |
215 | } | |
216 | ||
217 | /* enter phy low-power mode again */ | |
2cdcec4f | 218 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
219 | port = HCS_N_PORTS(ehci->hcs_params); |
220 | while (port--) { | |
a46af4eb | 221 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f | 222 | |
16032c4f AS |
223 | temp = ehci_readl(ehci, hostpc_reg); |
224 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); | |
225 | } | |
226 | } | |
ee0b9be8 AS |
227 | |
228 | /* Does the root hub have a port wakeup pending? */ | |
294d95f2 | 229 | if (!suspending && ehci_port_change(ehci)) |
ee0b9be8 | 230 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
148fc55f | 231 | |
c4f34764 | 232 | spin_unlock_irq(&ehci->lock); |
16032c4f AS |
233 | } |
234 | ||
0c0382e3 | 235 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
236 | { |
237 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
238 | int port; | |
8c03356a | 239 | int mask; |
16032c4f | 240 | int changed; |
1da177e4 | 241 | |
8c774fe8 AS |
242 | ehci_dbg(ehci, "suspend root hub\n"); |
243 | ||
1da177e4 LT |
244 | if (time_before (jiffies, ehci->next_statechange)) |
245 | msleep(5); | |
246 | ||
c4f34764 AS |
247 | /* stop the schedules */ |
248 | ehci_quiesce(ehci); | |
249 | ||
1da177e4 | 250 | spin_lock_irq (&ehci->lock); |
43fe3a99 AS |
251 | if (ehci->rh_state < EHCI_RH_RUNNING) |
252 | goto done; | |
1da177e4 | 253 | |
cec3a53c AS |
254 | /* Once the controller is stopped, port resumes that are already |
255 | * in progress won't complete. Hence if remote wakeup is enabled | |
256 | * for the root hub and any ports are in the middle of a resume or | |
257 | * remote wakeup, we must fail the suspend. | |
258 | */ | |
259 | if (hcd->self.root_hub->do_remote_wakeup) { | |
a448e4dc AS |
260 | if (ehci->resuming_ports) { |
261 | spin_unlock_irq(&ehci->lock); | |
262 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); | |
263 | return -EBUSY; | |
cec3a53c AS |
264 | } |
265 | } | |
266 | ||
8c03356a AS |
267 | /* Unlike other USB host controller types, EHCI doesn't have |
268 | * any notion of "global" or bus-wide suspend. The driver has | |
269 | * to manually suspend all the active unsuspended ports, and | |
270 | * then manually resume them in the bus_resume() routine. | |
271 | */ | |
272 | ehci->bus_suspended = 0; | |
383975d7 | 273 | ehci->owned_ports = 0; |
16032c4f | 274 | changed = 0; |
cec3a53c | 275 | port = HCS_N_PORTS(ehci->hcs_params); |
1da177e4 LT |
276 | while (port--) { |
277 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 278 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
16032c4f | 279 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
1da177e4 | 280 | |
8c03356a | 281 | /* keep track of which ports we suspend */ |
383975d7 AS |
282 | if (t1 & PORT_OWNER) |
283 | set_bit(port, &ehci->owned_ports); | |
284 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 285 | t2 |= PORT_SUSPEND; |
8c03356a AS |
286 | set_bit(port, &ehci->bus_suspended); |
287 | } | |
288 | ||
16032c4f | 289 | /* enable remote wakeup on all ports, if told to do so */ |
331ac6b2 AD |
290 | if (hcd->self.root_hub->do_remote_wakeup) { |
291 | /* only enable appropriate wake bits, otherwise the | |
292 | * hardware can not go phy low power mode. If a race | |
293 | * condition happens here(connection change during bits | |
294 | * set), the port change detection will finally fix it. | |
295 | */ | |
16032c4f | 296 | if (t1 & PORT_CONNECT) |
331ac6b2 | 297 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
16032c4f | 298 | else |
331ac6b2 | 299 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
16032c4f | 300 | } |
1da177e4 LT |
301 | |
302 | if (t1 != t2) { | |
083522d7 | 303 | ehci_writel(ehci, t2, reg); |
16032c4f AS |
304 | changed = 1; |
305 | } | |
306 | } | |
331ac6b2 | 307 | |
2cdcec4f | 308 | if (changed && ehci->has_tdi_phy_lpm) { |
16032c4f AS |
309 | spin_unlock_irq(&ehci->lock); |
310 | msleep(5); /* 5 ms for HCD to enter low-power mode */ | |
311 | spin_lock_irq(&ehci->lock); | |
312 | ||
313 | port = HCS_N_PORTS(ehci->hcs_params); | |
314 | while (port--) { | |
a46af4eb | 315 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
16032c4f AS |
316 | u32 t3; |
317 | ||
16032c4f AS |
318 | t3 = ehci_readl(ehci, hostpc_reg); |
319 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
320 | t3 = ehci_readl(ehci, hostpc_reg); | |
321 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", | |
331ac6b2 AD |
322 | port, (t3 & HOSTPC_PHCD) ? |
323 | "succeeded" : "failed"); | |
1da177e4 LT |
324 | } |
325 | } | |
c4f34764 | 326 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 327 | |
cd930c93 AS |
328 | /* Apparently some devices need a >= 1-uframe delay here */ |
329 | if (ehci->bus_suspended) | |
330 | udelay(150); | |
331 | ||
1da177e4 LT |
332 | /* turn off now-idle HC */ |
333 | ehci_halt (ehci); | |
c4f34764 AS |
334 | |
335 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
336 | if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
337 | ehci_handle_controller_death(ehci); | |
338 | if (ehci->rh_state != EHCI_RH_RUNNING) | |
339 | goto done; | |
e8799906 | 340 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1da177e4 | 341 | |
3c273a05 | 342 | end_unlink_async(ehci); |
2a40f324 | 343 | unlink_empty_async_suspended(ehci); |
9118f9eb | 344 | ehci_handle_start_intr_unlinks(ehci); |
df202255 | 345 | ehci_handle_intr_unlinks(ehci); |
55934eb3 | 346 | end_free_itds(ehci); |
cdc647a9 | 347 | |
8c03356a AS |
348 | /* allow remote wakeup */ |
349 | mask = INTR_MASK; | |
58a97ffe | 350 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 351 | mask &= ~STS_PCD; |
083522d7 BH |
352 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
353 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 354 | |
43fe3a99 | 355 | done: |
1da177e4 | 356 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
d58b4bcc AS |
357 | ehci->enabled_hrtimer_events = 0; |
358 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
1da177e4 | 359 | spin_unlock_irq (&ehci->lock); |
015798b2 | 360 | |
d58b4bcc | 361 | hrtimer_cancel(&ehci->hrtimer); |
1da177e4 LT |
362 | return 0; |
363 | } | |
364 | ||
365 | ||
366 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 367 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
368 | { |
369 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
370 | u32 temp; | |
383975d7 | 371 | u32 power_okay; |
1da177e4 | 372 | int i; |
d0f2fb25 | 373 | unsigned long resume_needed = 0; |
1da177e4 LT |
374 | |
375 | if (time_before (jiffies, ehci->next_statechange)) | |
376 | msleep(5); | |
377 | spin_lock_irq (&ehci->lock); | |
43fe3a99 AS |
378 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
379 | goto shutdown; | |
1da177e4 | 380 | |
ad45f1dc | 381 | if (unlikely(ehci->debug)) { |
9fa5780b | 382 | if (!dbgp_reset_prep(hcd)) |
ad45f1dc JW |
383 | ehci->debug = NULL; |
384 | else | |
9fa5780b | 385 | dbgp_external_startup(hcd); |
ad45f1dc JW |
386 | } |
387 | ||
f03c17fc DB |
388 | /* Ideally and we've got a real resume here, and no port's power |
389 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
390 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
391 | * the last user of the controller, not reset/pm hardware keeping | |
392 | * state we gave to it. | |
393 | */ | |
383975d7 AS |
394 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
395 | ehci_dbg(ehci, "resume root hub%s\n", | |
396 | power_okay ? "" : " after power loss"); | |
f03c17fc | 397 | |
8c03356a AS |
398 | /* at least some APM implementations will try to deliver |
399 | * IRQs right away, so delay them until we're ready. | |
400 | */ | |
083522d7 | 401 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
402 | |
403 | /* re-init operational registers */ | |
083522d7 BH |
404 | ehci_writel(ehci, 0, &ehci->regs->segment); |
405 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
406 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
407 | |
408 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
3d9545cc | 409 | ehci->command |= CMD_RUN; |
083522d7 | 410 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
e8799906 | 411 | ehci->rh_state = EHCI_RH_RUNNING; |
1da177e4 | 412 | |
6273f181 PC |
413 | /* |
414 | * According to Bugzilla #8190, the port status for some controllers | |
415 | * will be wrong without a delay. At their wrong status, the port | |
416 | * is enabled, but not suspended neither resumed. | |
417 | */ | |
418 | i = HCS_N_PORTS(ehci->hcs_params); | |
419 | while (i--) { | |
420 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
421 | if ((temp & PORT_PE) && | |
422 | !(temp & (PORT_SUSPEND | PORT_RESUME))) { | |
423 | ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); | |
424 | spin_unlock_irq(&ehci->lock); | |
425 | msleep(8); | |
426 | spin_lock_irq(&ehci->lock); | |
427 | break; | |
428 | } | |
429 | } | |
430 | ||
43fe3a99 AS |
431 | if (ehci->shutdown) |
432 | goto shutdown; | |
e198a314 | 433 | |
16032c4f | 434 | /* clear phy low-power mode before resume */ |
2cdcec4f | 435 | if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { |
16032c4f AS |
436 | i = HCS_N_PORTS(ehci->hcs_params); |
437 | while (i--) { | |
438 | if (test_bit(i, &ehci->bus_suspended)) { | |
a46af4eb AS |
439 | u32 __iomem *hostpc_reg = |
440 | &ehci->regs->hostpc[i]; | |
16032c4f | 441 | |
16032c4f AS |
442 | temp = ehci_readl(ehci, hostpc_reg); |
443 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, | |
444 | hostpc_reg); | |
445 | } | |
446 | } | |
447 | spin_unlock_irq(&ehci->lock); | |
448 | msleep(5); | |
449 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
450 | if (ehci->shutdown) |
451 | goto shutdown; | |
16032c4f AS |
452 | } |
453 | ||
8c03356a | 454 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
455 | i = HCS_N_PORTS (ehci->hcs_params); |
456 | while (i--) { | |
083522d7 | 457 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 458 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 459 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 460 | (temp & PORT_SUSPEND)) { |
1da177e4 | 461 | temp |= PORT_RESUME; |
d0f2fb25 | 462 | set_bit(i, &resume_needed); |
3a4e72cb | 463 | } |
083522d7 | 464 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 465 | } |
3a4e72cb VP |
466 | |
467 | /* msleep for 20ms only if code is trying to resume port */ | |
468 | if (resume_needed) { | |
469 | spin_unlock_irq(&ehci->lock); | |
470 | msleep(20); | |
471 | spin_lock_irq(&ehci->lock); | |
43fe3a99 AS |
472 | if (ehci->shutdown) |
473 | goto shutdown; | |
3a4e72cb VP |
474 | } |
475 | ||
1da177e4 | 476 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 477 | while (i--) { |
083522d7 | 478 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
d0f2fb25 | 479 | if (test_bit(i, &resume_needed)) { |
24b90814 | 480 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); |
083522d7 | 481 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a | 482 | } |
1da177e4 | 483 | } |
1da177e4 LT |
484 | |
485 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
c4f34764 AS |
486 | spin_unlock_irq(&ehci->lock); |
487 | ||
488 | ehci_handover_companion_ports(ehci); | |
1da177e4 LT |
489 | |
490 | /* Now we can safely re-enable irqs */ | |
43fe3a99 AS |
491 | spin_lock_irq(&ehci->lock); |
492 | if (ehci->shutdown) | |
493 | goto shutdown; | |
083522d7 | 494 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
15be105b | 495 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
43fe3a99 | 496 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 497 | |
1da177e4 | 498 | return 0; |
43fe3a99 AS |
499 | |
500 | shutdown: | |
501 | spin_unlock_irq(&ehci->lock); | |
502 | return -ESHUTDOWN; | |
1da177e4 LT |
503 | } |
504 | ||
505 | #else | |
506 | ||
0c0382e3 AS |
507 | #define ehci_bus_suspend NULL |
508 | #define ehci_bus_resume NULL | |
1da177e4 LT |
509 | |
510 | #endif /* CONFIG_PM */ | |
511 | ||
57e06c11 AS |
512 | /*-------------------------------------------------------------------------*/ |
513 | ||
57e06c11 | 514 | /* |
90da096e | 515 | * Sets the owner of a port |
57e06c11 | 516 | */ |
90da096e | 517 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 518 | { |
57e06c11 AS |
519 | u32 __iomem *status_reg; |
520 | u32 port_status; | |
90da096e | 521 | int try; |
57e06c11 | 522 | |
90da096e | 523 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
524 | |
525 | /* | |
526 | * The controller won't set the OWNER bit if the port is | |
527 | * enabled, so this loop will sometimes require at least two | |
528 | * iterations: one to disable the port and one to set OWNER. | |
529 | */ | |
57e06c11 AS |
530 | for (try = 4; try > 0; --try) { |
531 | spin_lock_irq(&ehci->lock); | |
532 | port_status = ehci_readl(ehci, status_reg); | |
533 | if ((port_status & PORT_OWNER) == new_owner | |
534 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
535 | == 0) | |
536 | try = 0; | |
537 | else { | |
538 | port_status ^= PORT_OWNER; | |
539 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
540 | ehci_writel(ehci, port_status, status_reg); | |
541 | } | |
542 | spin_unlock_irq(&ehci->lock); | |
543 | if (try > 1) | |
544 | msleep(5); | |
545 | } | |
90da096e BR |
546 | } |
547 | ||
1da177e4 LT |
548 | /*-------------------------------------------------------------------------*/ |
549 | ||
550 | static int check_reset_complete ( | |
551 | struct ehci_hcd *ehci, | |
552 | int index, | |
e6316565 | 553 | u32 __iomem *status_reg, |
1da177e4 LT |
554 | int port_status |
555 | ) { | |
cd4cdc93 | 556 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 557 | return port_status; |
1da177e4 LT |
558 | |
559 | /* if reset finished and it's still not enabled -- handoff */ | |
560 | if (!(port_status & PORT_PE)) { | |
561 | ||
562 | /* with integrated TT, there's nobody to hand it to! */ | |
563 | if (ehci_is_TDI(ehci)) { | |
564 | ehci_dbg (ehci, | |
565 | "Failed to enable port %d on root hub TT\n", | |
566 | index+1); | |
567 | return port_status; | |
568 | } | |
569 | ||
570 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
571 | index + 1); | |
572 | ||
573 | // what happens if HCS_N_CC(params) == 0 ? | |
574 | port_status |= PORT_OWNER; | |
10f6524a | 575 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 576 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 577 | |
796bcae7 VB |
578 | /* ensure 440EPX ohci controller state is operational */ |
579 | if (ehci->has_amcc_usb23) | |
580 | set_ohci_hcfs(ehci, 1); | |
581 | } else { | |
0ca7eb23 PC |
582 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
583 | index + 1); | |
796bcae7 VB |
584 | /* ensure 440EPx ohci controller state is suspended */ |
585 | if (ehci->has_amcc_usb23) | |
586 | set_ohci_hcfs(ehci, 0); | |
587 | } | |
1da177e4 LT |
588 | |
589 | return port_status; | |
590 | } | |
591 | ||
592 | /*-------------------------------------------------------------------------*/ | |
593 | ||
594 | ||
595 | /* build "status change" packet (one or two bytes) from HC registers */ | |
596 | ||
597 | static int | |
598 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
599 | { | |
600 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
a448e4dc | 601 | u32 temp, status; |
93f1a47c | 602 | u32 mask; |
1da177e4 LT |
603 | int ports, i, retval = 1; |
604 | unsigned long flags; | |
4dd405a4 | 605 | u32 ppcd = ~0; |
1da177e4 | 606 | |
1da177e4 LT |
607 | /* init status to no-changes */ |
608 | buf [0] = 0; | |
609 | ports = HCS_N_PORTS (ehci->hcs_params); | |
610 | if (ports > 7) { | |
611 | buf [1] = 0; | |
612 | retval++; | |
613 | } | |
53bd6a60 | 614 | |
a448e4dc AS |
615 | /* Inform the core about resumes-in-progress by returning |
616 | * a non-zero value even if there are no status changes. | |
617 | */ | |
618 | status = ehci->resuming_ports; | |
619 | ||
93f1a47c DB |
620 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
621 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 622 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
623 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
624 | * PORT_POWER; that's surprising, but maybe within-spec. | |
625 | */ | |
626 | if (!ignore_oc) | |
627 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
628 | else | |
629 | mask = PORT_CSC | PORT_PEC; | |
630 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
631 | ||
1da177e4 LT |
632 | /* no hub change reports (bit 0) for now (power, ...) */ |
633 | ||
634 | /* port N changes (bit N)? */ | |
635 | spin_lock_irqsave (&ehci->lock, flags); | |
5a9cdf33 AD |
636 | |
637 | /* get per-port change detect bits */ | |
638 | if (ehci->has_ppcd) | |
639 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; | |
640 | ||
1da177e4 | 641 | for (i = 0; i < ports; i++) { |
5a9cdf33 | 642 | /* leverage per-port change bits feature */ |
4dd405a4 AS |
643 | if (ppcd & (1 << i)) |
644 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); | |
645 | else | |
646 | temp = 0; | |
625b5c9a AS |
647 | |
648 | /* | |
649 | * Return status information even for ports with OWNER set. | |
650 | * Otherwise khubd wouldn't see the disconnect event when a | |
651 | * high-speed device is switched over to the companion | |
652 | * controller by the user. | |
653 | */ | |
654 | ||
eafe5b99 AS |
655 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
656 | || (ehci->reset_done[i] && time_after_eq( | |
657 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
658 | if (i < 7) |
659 | buf [0] |= 1 << (i + 1); | |
660 | else | |
661 | buf [1] |= 1 << (i - 7); | |
662 | status = STS_PCD; | |
663 | } | |
664 | } | |
ee74290b AS |
665 | |
666 | /* If a resume is in progress, make sure it can finish */ | |
667 | if (ehci->resuming_ports) | |
668 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); | |
669 | ||
1da177e4 LT |
670 | spin_unlock_irqrestore (&ehci->lock, flags); |
671 | return status ? retval : 0; | |
672 | } | |
673 | ||
674 | /*-------------------------------------------------------------------------*/ | |
675 | ||
676 | static void | |
677 | ehci_hub_descriptor ( | |
678 | struct ehci_hcd *ehci, | |
679 | struct usb_hub_descriptor *desc | |
680 | ) { | |
681 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
682 | u16 temp; | |
683 | ||
684 | desc->bDescriptorType = 0x29; | |
685 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
686 | desc->bHubContrCurrent = 0; | |
687 | ||
688 | desc->bNbrPorts = ports; | |
689 | temp = 1 + (ports / 8); | |
690 | desc->bDescLength = 7 + 2 * temp; | |
691 | ||
692 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
dbe79bbe JY |
693 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
694 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); | |
1da177e4 LT |
695 | |
696 | temp = 0x0008; /* per-port overcurrent reporting */ | |
697 | if (HCS_PPC (ehci->hcs_params)) | |
698 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
699 | else |
700 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
701 | #if 0 |
702 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
703 | if (HCS_INDICATOR (ehci->hcs_params)) | |
704 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
705 | #endif | |
fd05e720 | 706 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
707 | } |
708 | ||
9841f37a | 709 | /*-------------------------------------------------------------------------*/ |
726a85ca JP |
710 | #ifdef CONFIG_USB_HCD_TEST_MODE |
711 | ||
9841f37a MG |
712 | #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06 |
713 | ||
714 | static void usb_ehset_completion(struct urb *urb) | |
715 | { | |
716 | struct completion *done = urb->context; | |
717 | ||
718 | complete(done); | |
719 | } | |
720 | static int submit_single_step_set_feature( | |
721 | struct usb_hcd *hcd, | |
722 | struct urb *urb, | |
723 | int is_setup | |
724 | ); | |
725 | ||
726 | /* | |
727 | * Allocate and initialize a control URB. This request will be used by the | |
728 | * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages | |
729 | * of the GetDescriptor request are sent 15 seconds after the SETUP stage. | |
730 | * Return NULL if failed. | |
731 | */ | |
732 | static struct urb *request_single_step_set_feature_urb( | |
733 | struct usb_device *udev, | |
734 | void *dr, | |
735 | void *buf, | |
736 | struct completion *done | |
737 | ) { | |
738 | struct urb *urb; | |
739 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
740 | struct usb_host_endpoint *ep; | |
741 | ||
742 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
743 | if (!urb) | |
744 | return NULL; | |
745 | ||
746 | urb->pipe = usb_rcvctrlpipe(udev, 0); | |
747 | ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out) | |
748 | [usb_pipeendpoint(urb->pipe)]; | |
749 | if (!ep) { | |
750 | usb_free_urb(urb); | |
751 | return NULL; | |
752 | } | |
753 | ||
754 | urb->ep = ep; | |
755 | urb->dev = udev; | |
756 | urb->setup_packet = (void *)dr; | |
757 | urb->transfer_buffer = buf; | |
758 | urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; | |
759 | urb->complete = usb_ehset_completion; | |
760 | urb->status = -EINPROGRESS; | |
761 | urb->actual_length = 0; | |
762 | urb->transfer_flags = URB_DIR_IN; | |
763 | usb_get_urb(urb); | |
764 | atomic_inc(&urb->use_count); | |
765 | atomic_inc(&urb->dev->urbnum); | |
766 | urb->setup_dma = dma_map_single( | |
767 | hcd->self.controller, | |
768 | urb->setup_packet, | |
769 | sizeof(struct usb_ctrlrequest), | |
770 | DMA_TO_DEVICE); | |
771 | urb->transfer_dma = dma_map_single( | |
772 | hcd->self.controller, | |
773 | urb->transfer_buffer, | |
774 | urb->transfer_buffer_length, | |
775 | DMA_FROM_DEVICE); | |
776 | urb->context = done; | |
777 | return urb; | |
778 | } | |
779 | ||
780 | static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) | |
781 | { | |
782 | int retval = -ENOMEM; | |
783 | struct usb_ctrlrequest *dr; | |
784 | struct urb *urb; | |
785 | struct usb_device *udev; | |
786 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
787 | struct usb_device_descriptor *buf; | |
788 | DECLARE_COMPLETION_ONSTACK(done); | |
789 | ||
790 | /* Obtain udev of the rhub's child port */ | |
791 | udev = usb_hub_find_child(hcd->self.root_hub, port); | |
792 | if (!udev) { | |
793 | ehci_err(ehci, "No device attached to the RootHub\n"); | |
794 | return -ENODEV; | |
795 | } | |
796 | buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); | |
797 | if (!buf) | |
798 | return -ENOMEM; | |
799 | ||
800 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | |
801 | if (!dr) { | |
802 | kfree(buf); | |
803 | return -ENOMEM; | |
804 | } | |
805 | ||
806 | /* Fill Setup packet for GetDescriptor */ | |
807 | dr->bRequestType = USB_DIR_IN; | |
808 | dr->bRequest = USB_REQ_GET_DESCRIPTOR; | |
809 | dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); | |
810 | dr->wIndex = 0; | |
811 | dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); | |
812 | urb = request_single_step_set_feature_urb(udev, dr, buf, &done); | |
813 | if (!urb) | |
814 | goto cleanup; | |
815 | ||
816 | /* Submit just the SETUP stage */ | |
817 | retval = submit_single_step_set_feature(hcd, urb, 1); | |
818 | if (retval) | |
819 | goto out1; | |
820 | if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { | |
821 | usb_kill_urb(urb); | |
822 | retval = -ETIMEDOUT; | |
823 | ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__); | |
824 | goto out1; | |
825 | } | |
826 | msleep(15 * 1000); | |
827 | ||
828 | /* Complete remaining DATA and STATUS stages using the same URB */ | |
829 | urb->status = -EINPROGRESS; | |
830 | usb_get_urb(urb); | |
831 | atomic_inc(&urb->use_count); | |
832 | atomic_inc(&urb->dev->urbnum); | |
833 | retval = submit_single_step_set_feature(hcd, urb, 0); | |
834 | if (!retval && !wait_for_completion_timeout(&done, | |
835 | msecs_to_jiffies(2000))) { | |
836 | usb_kill_urb(urb); | |
837 | retval = -ETIMEDOUT; | |
838 | ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__); | |
839 | } | |
840 | out1: | |
841 | usb_free_urb(urb); | |
842 | cleanup: | |
843 | kfree(dr); | |
844 | kfree(buf); | |
845 | return retval; | |
846 | } | |
726a85ca | 847 | #endif /* CONFIG_USB_HCD_TEST_MODE */ |
1da177e4 LT |
848 | /*-------------------------------------------------------------------------*/ |
849 | ||
1da177e4 LT |
850 | static int ehci_hub_control ( |
851 | struct usb_hcd *hcd, | |
852 | u16 typeReq, | |
853 | u16 wValue, | |
854 | u16 wIndex, | |
855 | char *buf, | |
856 | u16 wLength | |
857 | ) { | |
858 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
859 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
860 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
861 | (wIndex & 0xff) - 1]; | |
a46af4eb | 862 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1]; |
331ac6b2 | 863 | u32 temp, temp1, status; |
1da177e4 LT |
864 | unsigned long flags; |
865 | int retval = 0; | |
f0d7f273 | 866 | unsigned selector; |
1da177e4 LT |
867 | |
868 | /* | |
869 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
870 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
871 | * (track current state ourselves) ... blink for diagnostics, | |
872 | * power, "this is the one", etc. EHCI spec supports this. | |
873 | */ | |
874 | ||
875 | spin_lock_irqsave (&ehci->lock, flags); | |
876 | switch (typeReq) { | |
877 | case ClearHubFeature: | |
878 | switch (wValue) { | |
879 | case C_HUB_LOCAL_POWER: | |
880 | case C_HUB_OVER_CURRENT: | |
881 | /* no hub-wide feature/status flags */ | |
882 | break; | |
883 | default: | |
884 | goto error; | |
885 | } | |
886 | break; | |
887 | case ClearPortFeature: | |
888 | if (!wIndex || wIndex > ports) | |
889 | goto error; | |
890 | wIndex--; | |
e6316565 | 891 | temp = ehci_readl(ehci, status_reg); |
6d5f89c7 | 892 | temp &= ~PORT_RWC_BITS; |
625b5c9a AS |
893 | |
894 | /* | |
895 | * Even if OWNER is set, so the port is owned by the | |
896 | * companion controller, khubd needs to be able to clear | |
897 | * the port-change status bits (especially | |
749da5f8 | 898 | * USB_PORT_STAT_C_CONNECTION). |
625b5c9a | 899 | */ |
1da177e4 LT |
900 | |
901 | switch (wValue) { | |
902 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 903 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
904 | break; |
905 | case USB_PORT_FEAT_C_ENABLE: | |
6d5f89c7 | 906 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
1da177e4 LT |
907 | break; |
908 | case USB_PORT_FEAT_SUSPEND: | |
909 | if (temp & PORT_RESET) | |
910 | goto error; | |
f8aeb3bb DB |
911 | if (ehci->no_selective_suspend) |
912 | break; | |
83722bc9 AG |
913 | #ifdef CONFIG_USB_OTG |
914 | if ((hcd->self.otg_port == (wIndex + 1)) | |
915 | && hcd->self.b_hnp_enable) { | |
c2e935a7 | 916 | otg_start_hnp(hcd->phy->otg); |
83722bc9 AG |
917 | break; |
918 | } | |
919 | #endif | |
16032c4f AS |
920 | if (!(temp & PORT_SUSPEND)) |
921 | break; | |
922 | if ((temp & PORT_PE) == 0) | |
923 | goto error; | |
924 | ||
925 | /* clear phy low-power mode before resume */ | |
2cdcec4f | 926 | if (ehci->has_tdi_phy_lpm) { |
16032c4f AS |
927 | temp1 = ehci_readl(ehci, hostpc_reg); |
928 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, | |
eab80de0 | 929 | hostpc_reg); |
16032c4f AS |
930 | spin_unlock_irqrestore(&ehci->lock, flags); |
931 | msleep(5);/* wait to leave low-power mode */ | |
932 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 933 | } |
16032c4f | 934 | /* resume signaling for 20 msec */ |
6d5f89c7 | 935 | temp &= ~PORT_WAKE_BITS; |
16032c4f AS |
936 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
937 | ehci->reset_done[wIndex] = jiffies | |
938 | + msecs_to_jiffies(20); | |
3a20446f AS |
939 | set_bit(wIndex, &ehci->resuming_ports); |
940 | usb_hcd_start_port_resume(&hcd->self, wIndex); | |
1da177e4 LT |
941 | break; |
942 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 943 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
944 | break; |
945 | case USB_PORT_FEAT_POWER: | |
946 | if (HCS_PPC (ehci->hcs_params)) | |
6d5f89c7 SW |
947 | ehci_writel(ehci, temp & ~PORT_POWER, |
948 | status_reg); | |
1da177e4 LT |
949 | break; |
950 | case USB_PORT_FEAT_C_CONNECTION: | |
6d5f89c7 | 951 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
1da177e4 LT |
952 | break; |
953 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
6d5f89c7 | 954 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
1da177e4 LT |
955 | break; |
956 | case USB_PORT_FEAT_C_RESET: | |
957 | /* GetPortStatus clears reset */ | |
958 | break; | |
959 | default: | |
960 | goto error; | |
961 | } | |
083522d7 | 962 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
963 | break; |
964 | case GetHubDescriptor: | |
965 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
966 | buf); | |
967 | break; | |
968 | case GetHubStatus: | |
969 | /* no hub-wide feature/status flags */ | |
970 | memset (buf, 0, 4); | |
971 | //cpu_to_le32s ((u32 *) buf); | |
972 | break; | |
973 | case GetPortStatus: | |
974 | if (!wIndex || wIndex > ports) | |
975 | goto error; | |
976 | wIndex--; | |
977 | status = 0; | |
e6316565 | 978 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
979 | |
980 | // wPortChange bits | |
981 | if (temp & PORT_CSC) | |
749da5f8 | 982 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
1da177e4 | 983 | if (temp & PORT_PEC) |
749da5f8 | 984 | status |= USB_PORT_STAT_C_ENABLE << 16; |
756aa6b3 CE |
985 | |
986 | if ((temp & PORT_OCC) && !ignore_oc){ | |
749da5f8 | 987 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
1da177e4 | 988 | |
756aa6b3 CE |
989 | /* |
990 | * Hubs should disable port power on over-current. | |
991 | * However, not all EHCI implementations do this | |
992 | * automatically, even if they _do_ support per-port | |
993 | * power switching; they're allowed to just limit the | |
994 | * current. khubd will turn the power back on. | |
995 | */ | |
e6604a7f CE |
996 | if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) |
997 | && HCS_PPC(ehci->hcs_params)) { | |
756aa6b3 CE |
998 | ehci_writel(ehci, |
999 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
1000 | status_reg); | |
81463c1d | 1001 | temp = ehci_readl(ehci, status_reg); |
756aa6b3 CE |
1002 | } |
1003 | } | |
1004 | ||
6753f4cf AS |
1005 | /* no reset or resume pending */ |
1006 | if (!ehci->reset_done[wIndex]) { | |
629e4427 AS |
1007 | |
1008 | /* Remote Wakeup received? */ | |
6753f4cf | 1009 | if (temp & PORT_RESUME) { |
629e4427 AS |
1010 | /* resume signaling for 20 msec */ |
1011 | ehci->reset_done[wIndex] = jiffies | |
1012 | + msecs_to_jiffies(20); | |
f292e7f9 | 1013 | usb_hcd_start_port_resume(&hcd->self, wIndex); |
47a64a13 | 1014 | set_bit(wIndex, &ehci->resuming_ports); |
629e4427 AS |
1015 | /* check the port again */ |
1016 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
1017 | ehci->reset_done[wIndex]); | |
1018 | } | |
1da177e4 | 1019 | |
6753f4cf AS |
1020 | /* reset or resume not yet complete */ |
1021 | } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { | |
1022 | ; /* wait until it is complete */ | |
1023 | ||
1024 | /* resume completed */ | |
1025 | } else if (test_bit(wIndex, &ehci->resuming_ports)) { | |
1026 | clear_bit(wIndex, &ehci->suspended_ports); | |
1027 | set_bit(wIndex, &ehci->port_c_suspend); | |
1028 | ehci->reset_done[wIndex] = 0; | |
1029 | usb_hcd_end_port_resume(&hcd->self, wIndex); | |
1030 | ||
1031 | /* stop resume signaling */ | |
1032 | temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); | |
1033 | ehci_writel(ehci, temp, status_reg); | |
1034 | clear_bit(wIndex, &ehci->resuming_ports); | |
1035 | retval = ehci_handshake(ehci, status_reg, | |
1036 | PORT_RESUME, 0, 2000 /* 2msec */); | |
1037 | if (retval != 0) { | |
1038 | ehci_err(ehci, "port %d resume error %d\n", | |
629e4427 | 1039 | wIndex + 1, retval); |
6753f4cf | 1040 | goto error; |
1da177e4 | 1041 | } |
6753f4cf | 1042 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1043 | |
1044 | /* whoever resets must GetPortStatus to complete it!! */ | |
6753f4cf | 1045 | } else { |
749da5f8 | 1046 | status |= USB_PORT_STAT_C_RESET << 16; |
1da177e4 LT |
1047 | ehci->reset_done [wIndex] = 0; |
1048 | ||
1049 | /* force reset to complete */ | |
083522d7 | 1050 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 1051 | status_reg); |
c22fa3ac DB |
1052 | /* REVISIT: some hardware needs 550+ usec to clear |
1053 | * this bit; seems too long to spin routinely... | |
1054 | */ | |
2f3a6b86 | 1055 | retval = ehci_handshake(ehci, status_reg, |
6307e096 | 1056 | PORT_RESET, 0, 1000); |
1da177e4 LT |
1057 | if (retval != 0) { |
1058 | ehci_err (ehci, "port %d reset error %d\n", | |
1059 | wIndex + 1, retval); | |
1060 | goto error; | |
1061 | } | |
1062 | ||
1063 | /* see what we found out */ | |
e6316565 AS |
1064 | temp = check_reset_complete (ehci, wIndex, status_reg, |
1065 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
1066 | } |
1067 | ||
57e06c11 AS |
1068 | /* transfer dedicated ports to the companion hc */ |
1069 | if ((temp & PORT_CONNECT) && | |
1070 | test_bit(wIndex, &ehci->companion_ports)) { | |
1071 | temp &= ~PORT_RWC_BITS; | |
1072 | temp |= PORT_OWNER; | |
1073 | ehci_writel(ehci, temp, status_reg); | |
1074 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
1075 | temp = ehci_readl(ehci, status_reg); | |
1076 | } | |
1077 | ||
625b5c9a AS |
1078 | /* |
1079 | * Even if OWNER is set, there's no harm letting khubd | |
1080 | * see the wPortStatus values (they should all be 0 except | |
1081 | * for PORT_POWER anyway). | |
1082 | */ | |
1083 | ||
1084 | if (temp & PORT_CONNECT) { | |
749da5f8 | 1085 | status |= USB_PORT_STAT_CONNECTION; |
625b5c9a | 1086 | // status may be from integrated TT |
331ac6b2 AD |
1087 | if (ehci->has_hostpc) { |
1088 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1089 | status |= ehci_port_speed(ehci, temp1); | |
1090 | } else | |
1091 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 1092 | } |
625b5c9a | 1093 | if (temp & PORT_PE) |
749da5f8 | 1094 | status |= USB_PORT_STAT_ENABLE; |
eafe5b99 AS |
1095 | |
1096 | /* maybe the port was unsuspended without our knowledge */ | |
1097 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
749da5f8 | 1098 | status |= USB_PORT_STAT_SUSPEND; |
eafe5b99 AS |
1099 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
1100 | clear_bit(wIndex, &ehci->suspended_ports); | |
a448e4dc | 1101 | clear_bit(wIndex, &ehci->resuming_ports); |
eafe5b99 AS |
1102 | ehci->reset_done[wIndex] = 0; |
1103 | if (temp & PORT_PE) | |
1104 | set_bit(wIndex, &ehci->port_c_suspend); | |
f292e7f9 | 1105 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
eafe5b99 AS |
1106 | } |
1107 | ||
625b5c9a | 1108 | if (temp & PORT_OC) |
749da5f8 | 1109 | status |= USB_PORT_STAT_OVERCURRENT; |
625b5c9a | 1110 | if (temp & PORT_RESET) |
749da5f8 | 1111 | status |= USB_PORT_STAT_RESET; |
625b5c9a | 1112 | if (temp & PORT_POWER) |
749da5f8 | 1113 | status |= USB_PORT_STAT_POWER; |
d1f114d1 | 1114 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
749da5f8 | 1115 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
1da177e4 | 1116 | |
9776afc8 | 1117 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
1118 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
1119 | #endif | |
1120 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 1121 | put_unaligned_le32(status, buf); |
1da177e4 LT |
1122 | break; |
1123 | case SetHubFeature: | |
1124 | switch (wValue) { | |
1125 | case C_HUB_LOCAL_POWER: | |
1126 | case C_HUB_OVER_CURRENT: | |
1127 | /* no hub-wide feature/status flags */ | |
1128 | break; | |
1129 | default: | |
1130 | goto error; | |
1131 | } | |
1132 | break; | |
1133 | case SetPortFeature: | |
f0d7f273 DB |
1134 | selector = wIndex >> 8; |
1135 | wIndex &= 0xff; | |
8d053c79 JW |
1136 | if (unlikely(ehci->debug)) { |
1137 | /* If the debug port is active any port | |
1138 | * feature requests should get denied */ | |
1139 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
1140 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
1141 | retval = -ENODEV; | |
1142 | goto error_exit; | |
1143 | } | |
1144 | } | |
1da177e4 LT |
1145 | if (!wIndex || wIndex > ports) |
1146 | goto error; | |
1147 | wIndex--; | |
e6316565 | 1148 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
1149 | if (temp & PORT_OWNER) |
1150 | break; | |
1151 | ||
10f6524a | 1152 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
1153 | switch (wValue) { |
1154 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
1155 | if (ehci->no_selective_suspend) |
1156 | break; | |
1da177e4 LT |
1157 | if ((temp & PORT_PE) == 0 |
1158 | || (temp & PORT_RESET) != 0) | |
1159 | goto error; | |
b9df7942 | 1160 | |
331ac6b2 AD |
1161 | /* After above check the port must be connected. |
1162 | * Set appropriate bit thus could put phy into low power | |
2cdcec4f | 1163 | * mode if we have tdi_phy_lpm feature |
331ac6b2 | 1164 | */ |
b9df7942 AD |
1165 | temp &= ~PORT_WKCONN_E; |
1166 | temp |= PORT_WKDISC_E | PORT_WKOC_E; | |
1167 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
2cdcec4f | 1168 | if (ehci->has_tdi_phy_lpm) { |
b9df7942 | 1169 | spin_unlock_irqrestore(&ehci->lock, flags); |
331ac6b2 | 1170 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
b9df7942 | 1171 | spin_lock_irqsave(&ehci->lock, flags); |
331ac6b2 AD |
1172 | temp1 = ehci_readl(ehci, hostpc_reg); |
1173 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
1174 | hostpc_reg); | |
1175 | temp1 = ehci_readl(ehci, hostpc_reg); | |
1176 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
1177 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
1178 | "succeeded" : "failed"); | |
1179 | } | |
eafe5b99 | 1180 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
1181 | break; |
1182 | case USB_PORT_FEAT_POWER: | |
1183 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 1184 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 1185 | status_reg); |
1da177e4 LT |
1186 | break; |
1187 | case USB_PORT_FEAT_RESET: | |
6753f4cf | 1188 | if (temp & (PORT_SUSPEND|PORT_RESUME)) |
1da177e4 LT |
1189 | goto error; |
1190 | /* line status bits may report this as low speed, | |
1191 | * which can be fine if this root hub has a | |
1192 | * transaction translator built in. | |
1193 | */ | |
1194 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
1195 | && !ehci_is_TDI(ehci) | |
1196 | && PORT_USB11 (temp)) { | |
1197 | ehci_dbg (ehci, | |
1198 | "port %d low speed --> companion\n", | |
1199 | wIndex + 1); | |
1200 | temp |= PORT_OWNER; | |
1201 | } else { | |
1da177e4 LT |
1202 | temp |= PORT_RESET; |
1203 | temp &= ~PORT_PE; | |
1204 | ||
1205 | /* | |
1206 | * caller must wait, then call GetPortStatus | |
1207 | * usb 2.0 spec says 50 ms resets on root | |
1208 | */ | |
1209 | ehci->reset_done [wIndex] = jiffies | |
1210 | + msecs_to_jiffies (50); | |
1211 | } | |
e6316565 | 1212 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 1213 | break; |
f0d7f273 DB |
1214 | |
1215 | /* For downstream facing ports (these): one hub port is put | |
1216 | * into test mode according to USB2 11.24.2.13, then the hub | |
1217 | * must be reset (which for root hub now means rmmod+modprobe, | |
1218 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
1219 | * about the EHCI-specific stuff. | |
1220 | */ | |
1221 | case USB_PORT_FEAT_TEST: | |
726a85ca | 1222 | #ifdef CONFIG_USB_HCD_TEST_MODE |
9841f37a MG |
1223 | if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
1224 | spin_unlock_irqrestore(&ehci->lock, flags); | |
1225 | retval = ehset_single_step_set_feature(hcd, | |
1226 | wIndex); | |
1227 | spin_lock_irqsave(&ehci->lock, flags); | |
1228 | break; | |
726a85ca JP |
1229 | } |
1230 | #endif | |
1231 | if (!selector || selector > 5) | |
f0d7f273 | 1232 | goto error; |
c4f34764 | 1233 | spin_unlock_irqrestore(&ehci->lock, flags); |
f0d7f273 | 1234 | ehci_quiesce(ehci); |
c4f34764 | 1235 | spin_lock_irqsave(&ehci->lock, flags); |
77636c86 BT |
1236 | |
1237 | /* Put all enabled ports into suspend */ | |
1238 | while (ports--) { | |
1239 | u32 __iomem *sreg = | |
1240 | &ehci->regs->port_status[ports]; | |
1241 | ||
1242 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; | |
1243 | if (temp & PORT_PE) | |
1244 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
1245 | sreg); | |
1246 | } | |
c4f34764 AS |
1247 | |
1248 | spin_unlock_irqrestore(&ehci->lock, flags); | |
f0d7f273 | 1249 | ehci_halt(ehci); |
c4f34764 AS |
1250 | spin_lock_irqsave(&ehci->lock, flags); |
1251 | ||
77636c86 | 1252 | temp = ehci_readl(ehci, status_reg); |
f0d7f273 | 1253 | temp |= selector << 16; |
e6316565 | 1254 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
1255 | break; |
1256 | ||
1da177e4 LT |
1257 | default: |
1258 | goto error; | |
1259 | } | |
083522d7 | 1260 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
1261 | break; |
1262 | ||
1263 | default: | |
1264 | error: | |
1265 | /* "stall" on error */ | |
1266 | retval = -EPIPE; | |
1267 | } | |
8d053c79 | 1268 | error_exit: |
1da177e4 LT |
1269 | spin_unlock_irqrestore (&ehci->lock, flags); |
1270 | return retval; | |
1271 | } | |
90da096e | 1272 | |
3e023203 | 1273 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
90da096e BR |
1274 | { |
1275 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1276 | ||
1277 | if (ehci_is_TDI(ehci)) | |
1278 | return; | |
1279 | set_owner(ehci, --portnum, PORT_OWNER); | |
1280 | } | |
1281 | ||
3e023203 | 1282 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
3a31155c AS |
1283 | { |
1284 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1285 | u32 __iomem *reg; | |
1286 | ||
1287 | if (ehci_is_TDI(ehci)) | |
1288 | return 0; | |
1289 | reg = &ehci->regs->port_status[portnum - 1]; | |
1290 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
1291 | } |