Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * OHCI HCD (Host Controller Driver) for USB. | |
dd9048af | 3 | * |
1da177e4 LT |
4 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
5 | * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net> | |
dd9048af | 6 | * |
1da177e4 LT |
7 | * This file is licenced under GPL |
8 | */ | |
9 | ||
10 | /*-------------------------------------------------------------------------*/ | |
11 | ||
12 | /* | |
13 | * OHCI Root Hub ... the nonsharable stuff | |
14 | */ | |
15 | ||
16 | #define dbg_port(hc,label,num,value) \ | |
17 | ohci_dbg (hc, \ | |
18 | "%s roothub.portstatus [%d] " \ | |
19 | "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ | |
20 | label, num, temp, \ | |
21 | (temp & RH_PS_PRSC) ? " PRSC" : "", \ | |
22 | (temp & RH_PS_OCIC) ? " OCIC" : "", \ | |
23 | (temp & RH_PS_PSSC) ? " PSSC" : "", \ | |
24 | (temp & RH_PS_PESC) ? " PESC" : "", \ | |
25 | (temp & RH_PS_CSC) ? " CSC" : "", \ | |
dd9048af | 26 | \ |
1da177e4 LT |
27 | (temp & RH_PS_LSDA) ? " LSDA" : "", \ |
28 | (temp & RH_PS_PPS) ? " PPS" : "", \ | |
29 | (temp & RH_PS_PRS) ? " PRS" : "", \ | |
30 | (temp & RH_PS_POCI) ? " POCI" : "", \ | |
31 | (temp & RH_PS_PSS) ? " PSS" : "", \ | |
dd9048af | 32 | \ |
1da177e4 LT |
33 | (temp & RH_PS_PES) ? " PES" : "", \ |
34 | (temp & RH_PS_CCS) ? " CCS" : "" \ | |
35 | ); | |
36 | ||
37 | /*-------------------------------------------------------------------------*/ | |
38 | ||
1da177e4 LT |
39 | #define OHCI_SCHED_ENABLES \ |
40 | (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE) | |
41 | ||
c6fcb85e | 42 | static void update_done_list(struct ohci_hcd *); |
cdb4dd15 | 43 | static void ohci_work(struct ohci_hcd *); |
1da177e4 | 44 | |
b1878440 | 45 | #ifdef CONFIG_PM |
8d1a243b AS |
46 | static int ohci_rh_suspend (struct ohci_hcd *ohci, int autostop) |
47 | __releases(ohci->lock) | |
48 | __acquires(ohci->lock) | |
1da177e4 | 49 | { |
1da177e4 | 50 | int status = 0; |
8de98402 | 51 | |
1da177e4 LT |
52 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); |
53 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
54 | case OHCI_USB_RESUME: | |
55 | ohci_dbg (ohci, "resume/suspend?\n"); | |
56 | ohci->hc_control &= ~OHCI_CTRL_HCFS; | |
57 | ohci->hc_control |= OHCI_USB_RESET; | |
58 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
59 | (void) ohci_readl (ohci, &ohci->regs->control); | |
60 | /* FALL THROUGH */ | |
61 | case OHCI_USB_RESET: | |
62 | status = -EBUSY; | |
63 | ohci_dbg (ohci, "needs reinit!\n"); | |
64 | goto done; | |
65 | case OHCI_USB_SUSPEND: | |
8d1a243b AS |
66 | if (!ohci->autostop) { |
67 | ohci_dbg (ohci, "already suspended\n"); | |
68 | goto done; | |
69 | } | |
1da177e4 | 70 | } |
8d1a243b AS |
71 | ohci_dbg (ohci, "%s root hub\n", |
72 | autostop ? "auto-stop" : "suspend"); | |
1da177e4 LT |
73 | |
74 | /* First stop any processing */ | |
8d1a243b | 75 | if (!autostop && (ohci->hc_control & OHCI_SCHED_ENABLES)) { |
1da177e4 LT |
76 | ohci->hc_control &= ~OHCI_SCHED_ENABLES; |
77 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
78 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); | |
79 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus); | |
80 | ||
81 | /* sched disables take effect on the next frame, | |
82 | * then the last WDH could take 6+ msec | |
83 | */ | |
84 | ohci_dbg (ohci, "stopping schedules ...\n"); | |
8d1a243b AS |
85 | ohci->autostop = 0; |
86 | spin_unlock_irq (&ohci->lock); | |
87 | msleep (8); | |
88 | spin_lock_irq (&ohci->lock); | |
1da177e4 | 89 | } |
c6fcb85e | 90 | update_done_list(ohci); |
cdb4dd15 | 91 | ohci_work(ohci); |
1da177e4 | 92 | |
c1db30a2 AS |
93 | /* |
94 | * Some controllers don't handle "global" suspend properly if | |
95 | * there are unsuspended ports. For these controllers, put all | |
96 | * the enabled ports into suspend before suspending the root hub. | |
97 | */ | |
98 | if (ohci->flags & OHCI_QUIRK_GLOBAL_SUSPEND) { | |
99 | __hc32 __iomem *portstat = ohci->regs->roothub.portstatus; | |
100 | int i; | |
101 | unsigned temp; | |
102 | ||
103 | for (i = 0; i < ohci->num_ports; (++i, ++portstat)) { | |
104 | temp = ohci_readl(ohci, portstat); | |
105 | if ((temp & (RH_PS_PES | RH_PS_PSS)) == | |
106 | RH_PS_PES) | |
107 | ohci_writel(ohci, RH_PS_PSS, portstat); | |
108 | } | |
109 | } | |
110 | ||
1da177e4 | 111 | /* maybe resume can wake root hub */ |
58a97ffe | 112 | if (ohci_to_hcd(ohci)->self.root_hub->do_remote_wakeup || autostop) { |
1da177e4 | 113 | ohci->hc_control |= OHCI_CTRL_RWE; |
58a97ffe | 114 | } else { |
5f47493c AS |
115 | ohci_writel(ohci, OHCI_INTR_RHSC | OHCI_INTR_RD, |
116 | &ohci->regs->intrdisable); | |
1da177e4 | 117 | ohci->hc_control &= ~OHCI_CTRL_RWE; |
1f7e1a3b | 118 | } |
1da177e4 | 119 | |
f197b2c5 DB |
120 | /* Suspend hub ... this is the "global (to this bus) suspend" mode, |
121 | * which doesn't imply ports will first be individually suspended. | |
122 | */ | |
1da177e4 LT |
123 | ohci->hc_control &= ~OHCI_CTRL_HCFS; |
124 | ohci->hc_control |= OHCI_USB_SUSPEND; | |
125 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
126 | (void) ohci_readl (ohci, &ohci->regs->control); | |
127 | ||
128 | /* no resumes until devices finish suspending */ | |
8d1a243b AS |
129 | if (!autostop) { |
130 | ohci->next_statechange = jiffies + msecs_to_jiffies (5); | |
131 | ohci->autostop = 0; | |
b7463c71 | 132 | ohci->rh_state = OHCI_RH_SUSPENDED; |
8d1a243b | 133 | } |
d413984a | 134 | |
1da177e4 | 135 | done: |
1da177e4 LT |
136 | return status; |
137 | } | |
138 | ||
139 | static inline struct ed *find_head (struct ed *ed) | |
140 | { | |
141 | /* for bulk and control lists */ | |
142 | while (ed->ed_prev) | |
143 | ed = ed->ed_prev; | |
144 | return ed; | |
145 | } | |
146 | ||
147 | /* caller has locked the root hub */ | |
8d1a243b AS |
148 | static int ohci_rh_resume (struct ohci_hcd *ohci) |
149 | __releases(ohci->lock) | |
150 | __acquires(ohci->lock) | |
1da177e4 | 151 | { |
8d1a243b | 152 | struct usb_hcd *hcd = ohci_to_hcd (ohci); |
1da177e4 LT |
153 | u32 temp, enables; |
154 | int status = -EINPROGRESS; | |
8d1a243b | 155 | int autostopped = ohci->autostop; |
8de98402 | 156 | |
8d1a243b | 157 | ohci->autostop = 0; |
1da177e4 LT |
158 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); |
159 | ||
160 | if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { | |
f197b2c5 | 161 | /* this can happen after resuming a swsusp snapshot */ |
b7463c71 | 162 | if (ohci->rh_state != OHCI_RH_RUNNING) { |
1da177e4 LT |
163 | ohci_dbg (ohci, "BIOS/SMM active, control %03x\n", |
164 | ohci->hc_control); | |
165 | status = -EBUSY; | |
166 | /* this happens when pmcore resumes HC then root */ | |
167 | } else { | |
168 | ohci_dbg (ohci, "duplicate resume\n"); | |
169 | status = 0; | |
170 | } | |
171 | } else switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
172 | case OHCI_USB_SUSPEND: | |
173 | ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); | |
174 | ohci->hc_control |= OHCI_USB_RESUME; | |
175 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
176 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
177 | ohci_dbg (ohci, "%s root hub\n", |
178 | autostopped ? "auto-start" : "resume"); | |
1da177e4 LT |
179 | break; |
180 | case OHCI_USB_RESUME: | |
181 | /* HCFS changes sometime after INTR_RD */ | |
1b7be3c0 | 182 | ohci_dbg(ohci, "%swakeup root hub\n", |
583ceada | 183 | autostopped ? "auto-" : ""); |
1da177e4 LT |
184 | break; |
185 | case OHCI_USB_OPER: | |
f197b2c5 DB |
186 | /* this can happen after resuming a swsusp snapshot */ |
187 | ohci_dbg (ohci, "snapshot resume? reinit\n"); | |
188 | status = -EBUSY; | |
1da177e4 LT |
189 | break; |
190 | default: /* RESET, we lost power */ | |
f197b2c5 | 191 | ohci_dbg (ohci, "lost power\n"); |
1da177e4 LT |
192 | status = -EBUSY; |
193 | } | |
1da177e4 | 194 | if (status == -EBUSY) { |
8d1a243b | 195 | if (!autostopped) { |
8d1a243b | 196 | spin_unlock_irq (&ohci->lock); |
8d1a243b | 197 | status = ohci_restart (ohci); |
d576bb9f MH |
198 | |
199 | usb_root_hub_lost_power(hcd->self.root_hub); | |
200 | ||
8d1a243b AS |
201 | spin_lock_irq (&ohci->lock); |
202 | } | |
203 | return status; | |
1da177e4 LT |
204 | } |
205 | if (status != -EINPROGRESS) | |
206 | return status; | |
8d1a243b AS |
207 | if (autostopped) |
208 | goto skip_resume; | |
209 | spin_unlock_irq (&ohci->lock); | |
1da177e4 | 210 | |
1da177e4 | 211 | /* Some controllers (lucent erratum) need extra-long delays */ |
f197b2c5 | 212 | msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); |
1da177e4 LT |
213 | |
214 | temp = ohci_readl (ohci, &ohci->regs->control); | |
215 | temp &= OHCI_CTRL_HCFS; | |
216 | if (temp != OHCI_USB_RESUME) { | |
217 | ohci_err (ohci, "controller won't resume\n"); | |
565402ba | 218 | spin_lock_irq(&ohci->lock); |
1da177e4 LT |
219 | return -EBUSY; |
220 | } | |
221 | ||
222 | /* disable old schedule state, reinit from scratch */ | |
223 | ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); | |
224 | ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent); | |
225 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); | |
226 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent); | |
227 | ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent); | |
228 | ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); | |
229 | ||
230 | /* Sometimes PCI D3 suspend trashes frame timings ... */ | |
231 | periodic_reinit (ohci); | |
232 | ||
7c71c6e6 AS |
233 | /* |
234 | * The following code is executed with ohci->lock held and | |
235 | * irqs disabled if and only if autostopped is true. This | |
236 | * will cause sparse to warn about a "context imbalance". | |
8d1a243b | 237 | */ |
8d1a243b | 238 | skip_resume: |
1da177e4 LT |
239 | /* interrupts might have been disabled */ |
240 | ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable); | |
241 | if (ohci->ed_rm_list) | |
242 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable); | |
1da177e4 LT |
243 | |
244 | /* Then re-enable operations */ | |
245 | ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control); | |
246 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
247 | if (!autostopped) |
248 | msleep (3); | |
1da177e4 | 249 | |
6a9062f3 DB |
250 | temp = ohci->hc_control; |
251 | temp &= OHCI_CTRL_RWC; | |
252 | temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; | |
1da177e4 LT |
253 | ohci->hc_control = temp; |
254 | ohci_writel (ohci, temp, &ohci->regs->control); | |
255 | (void) ohci_readl (ohci, &ohci->regs->control); | |
256 | ||
257 | /* TRSMRCY */ | |
8d1a243b AS |
258 | if (!autostopped) { |
259 | msleep (10); | |
260 | spin_lock_irq (&ohci->lock); | |
261 | } | |
262 | /* now ohci->lock is always held and irqs are always disabled */ | |
1da177e4 | 263 | |
d413984a DB |
264 | /* keep it alive for more than ~5x suspend + resume costs */ |
265 | ohci->next_statechange = jiffies + STATECHANGE_DELAY; | |
1da177e4 LT |
266 | |
267 | /* maybe turn schedules back on */ | |
268 | enables = 0; | |
269 | temp = 0; | |
270 | if (!ohci->ed_rm_list) { | |
271 | if (ohci->ed_controltail) { | |
272 | ohci_writel (ohci, | |
273 | find_head (ohci->ed_controltail)->dma, | |
274 | &ohci->regs->ed_controlhead); | |
275 | enables |= OHCI_CTRL_CLE; | |
276 | temp |= OHCI_CLF; | |
277 | } | |
278 | if (ohci->ed_bulktail) { | |
279 | ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma, | |
280 | &ohci->regs->ed_bulkhead); | |
281 | enables |= OHCI_CTRL_BLE; | |
282 | temp |= OHCI_BLF; | |
283 | } | |
284 | } | |
285 | if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) | |
286 | enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; | |
287 | if (enables) { | |
288 | ohci_dbg (ohci, "restarting schedules ... %08x\n", enables); | |
289 | ohci->hc_control |= enables; | |
290 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
291 | if (temp) | |
292 | ohci_writel (ohci, temp, &ohci->regs->cmdstatus); | |
293 | (void) ohci_readl (ohci, &ohci->regs->control); | |
294 | } | |
295 | ||
b7463c71 | 296 | ohci->rh_state = OHCI_RH_RUNNING; |
1da177e4 LT |
297 | return 0; |
298 | } | |
299 | ||
8d1a243b AS |
300 | static int ohci_bus_suspend (struct usb_hcd *hcd) |
301 | { | |
302 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
303 | int rc; | |
304 | ||
305 | spin_lock_irq (&ohci->lock); | |
306 | ||
541c7d43 | 307 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8d1a243b AS |
308 | rc = -ESHUTDOWN; |
309 | else | |
310 | rc = ohci_rh_suspend (ohci, 0); | |
311 | spin_unlock_irq (&ohci->lock); | |
81e38333 AS |
312 | |
313 | if (rc == 0) | |
314 | del_timer_sync(&ohci->io_watchdog); | |
8d1a243b AS |
315 | return rc; |
316 | } | |
317 | ||
318 | static int ohci_bus_resume (struct usb_hcd *hcd) | |
319 | { | |
320 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
321 | int rc; | |
322 | ||
323 | if (time_before (jiffies, ohci->next_statechange)) | |
324 | msleep(5); | |
325 | ||
326 | spin_lock_irq (&ohci->lock); | |
327 | ||
541c7d43 | 328 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8d1a243b AS |
329 | rc = -ESHUTDOWN; |
330 | else | |
331 | rc = ohci_rh_resume (ohci); | |
332 | spin_unlock_irq (&ohci->lock); | |
333 | ||
334 | /* poll until we know a device is connected or we autostop */ | |
335 | if (rc == 0) | |
336 | usb_hcd_poll_rh_status(hcd); | |
337 | return rc; | |
338 | } | |
339 | ||
1f9fc882 AS |
340 | /* Carry out polling-, autostop-, and autoresume-related state changes */ |
341 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
71b7497c | 342 | int any_connected, int rhsc_status) |
1f9fc882 AS |
343 | { |
344 | int poll_rh = 1; | |
71b7497c | 345 | int rhsc_enable; |
1f9fc882 | 346 | |
ee0b9be8 | 347 | /* Some broken controllers never turn off RHSC in the interrupt |
4a511bc3 AS |
348 | * status register. For their sake we won't re-enable RHSC |
349 | * interrupts if the interrupt bit is already active. | |
350 | */ | |
4a511bc3 AS |
351 | rhsc_enable = ohci_readl(ohci, &ohci->regs->intrenable) & |
352 | OHCI_INTR_RHSC; | |
1f9fc882 | 353 | |
4a511bc3 | 354 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { |
1f9fc882 | 355 | case OHCI_USB_OPER: |
4a511bc3 AS |
356 | /* If no status changes are pending, enable RHSC interrupts. */ |
357 | if (!rhsc_enable && !rhsc_status && !changed) { | |
358 | rhsc_enable = OHCI_INTR_RHSC; | |
359 | ohci_writel(ohci, rhsc_enable, &ohci->regs->intrenable); | |
b5fb454f AS |
360 | } |
361 | ||
362 | /* Keep on polling until we know a device is connected | |
363 | * and RHSC is enabled, or until we autostop. | |
364 | */ | |
1f9fc882 AS |
365 | if (!ohci->autostop) { |
366 | if (any_connected || | |
367 | !device_may_wakeup(&ohci_to_hcd(ohci) | |
368 | ->self.root_hub->dev)) { | |
4a511bc3 | 369 | if (rhsc_enable) |
1f9fc882 AS |
370 | poll_rh = 0; |
371 | } else { | |
372 | ohci->autostop = 1; | |
373 | ohci->next_statechange = jiffies + HZ; | |
374 | } | |
375 | ||
376 | /* if no devices have been attached for one second, autostop */ | |
377 | } else { | |
378 | if (changed || any_connected) { | |
379 | ohci->autostop = 0; | |
380 | ohci->next_statechange = jiffies + | |
381 | STATECHANGE_DELAY; | |
4a511bc3 | 382 | } else if (time_after_eq(jiffies, |
1f9fc882 AS |
383 | ohci->next_statechange) |
384 | && !ohci->ed_rm_list | |
385 | && !(ohci->hc_control & | |
386 | OHCI_SCHED_ENABLES)) { | |
387 | ohci_rh_suspend(ohci, 1); | |
4a511bc3 AS |
388 | if (rhsc_enable) |
389 | poll_rh = 0; | |
1f9fc882 AS |
390 | } |
391 | } | |
392 | break; | |
393 | ||
1f9fc882 AS |
394 | case OHCI_USB_SUSPEND: |
395 | case OHCI_USB_RESUME: | |
4a511bc3 | 396 | /* if there is a port change, autostart or ask to be resumed */ |
1f9fc882 AS |
397 | if (changed) { |
398 | if (ohci->autostop) | |
399 | ohci_rh_resume(ohci); | |
400 | else | |
401 | usb_hcd_resume_root_hub(ohci_to_hcd(ohci)); | |
71b7497c AS |
402 | |
403 | /* If remote wakeup is disabled, stop polling */ | |
404 | } else if (!ohci->autostop && | |
405 | !ohci_to_hcd(ohci)->self.root_hub-> | |
406 | do_remote_wakeup) { | |
407 | poll_rh = 0; | |
408 | ||
1f9fc882 | 409 | } else { |
71b7497c AS |
410 | /* If no status changes are pending, |
411 | * enable RHSC interrupts | |
412 | */ | |
413 | if (!rhsc_enable && !rhsc_status) { | |
4a511bc3 AS |
414 | rhsc_enable = OHCI_INTR_RHSC; |
415 | ohci_writel(ohci, rhsc_enable, | |
b5fb454f | 416 | &ohci->regs->intrenable); |
4a511bc3 | 417 | } |
71b7497c | 418 | /* Keep polling until RHSC is enabled */ |
4a511bc3 AS |
419 | if (rhsc_enable) |
420 | poll_rh = 0; | |
1f9fc882 AS |
421 | } |
422 | break; | |
423 | } | |
424 | return poll_rh; | |
425 | } | |
426 | ||
427 | #else /* CONFIG_PM */ | |
428 | ||
429 | static inline int ohci_rh_resume(struct ohci_hcd *ohci) | |
430 | { | |
431 | return 0; | |
432 | } | |
433 | ||
434 | /* Carry out polling-related state changes. | |
435 | * autostop isn't used when CONFIG_PM is turned off. | |
436 | */ | |
437 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
71b7497c | 438 | int any_connected, int rhsc_status) |
1f9fc882 | 439 | { |
b5fb454f | 440 | /* If RHSC is enabled, don't poll */ |
09ca8adb | 441 | if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC) |
b5fb454f AS |
442 | return 0; |
443 | ||
71b7497c AS |
444 | /* If status changes are pending, continue polling. |
445 | * Conversely, if no status changes are pending but the RHSC | |
446 | * status bit was set, then RHSC may be broken so continue polling. | |
447 | */ | |
448 | if (changed || rhsc_status) | |
449 | return 1; | |
450 | ||
451 | /* It's safe to re-enable RHSC interrupts */ | |
452 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable); | |
453 | return 0; | |
1f9fc882 AS |
454 | } |
455 | ||
8ad7fe16 | 456 | #endif /* CONFIG_PM */ |
1da177e4 LT |
457 | |
458 | /*-------------------------------------------------------------------------*/ | |
459 | ||
460 | /* build "status change" packet (one or two bytes) from HC registers */ | |
461 | ||
42b59eba | 462 | int ohci_hub_status_data(struct usb_hcd *hcd, char *buf) |
1da177e4 LT |
463 | { |
464 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fdd13b36 | 465 | int i, changed = 0, length = 1; |
052ac01a | 466 | int any_connected = 0; |
71b7497c | 467 | int rhsc_status; |
1da177e4 LT |
468 | unsigned long flags; |
469 | ||
470 | spin_lock_irqsave (&ohci->lock, flags); | |
541c7d43 | 471 | if (!HCD_HW_ACCESSIBLE(hcd)) |
6fd75b19 | 472 | goto done; |
1da177e4 | 473 | |
fdd13b36 DB |
474 | /* undocumented erratum seen on at least rev D */ |
475 | if ((ohci->flags & OHCI_QUIRK_AMD756) | |
476 | && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) { | |
477 | ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n", | |
1da177e4 LT |
478 | ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP); |
479 | /* retry later; "should not happen" */ | |
480 | goto done; | |
481 | } | |
482 | ||
483 | /* init status */ | |
484 | if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC)) | |
485 | buf [0] = changed = 1; | |
486 | else | |
487 | buf [0] = 0; | |
fdd13b36 | 488 | if (ohci->num_ports > 7) { |
1da177e4 LT |
489 | buf [1] = 0; |
490 | length++; | |
491 | } | |
492 | ||
71b7497c AS |
493 | /* Clear the RHSC status flag before reading the port statuses */ |
494 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrstatus); | |
495 | rhsc_status = ohci_readl(ohci, &ohci->regs->intrstatus) & | |
496 | OHCI_INTR_RHSC; | |
497 | ||
1da177e4 | 498 | /* look at each port */ |
fdd13b36 | 499 | for (i = 0; i < ohci->num_ports; i++) { |
1da177e4 LT |
500 | u32 status = roothub_portstatus (ohci, i); |
501 | ||
8d1a243b AS |
502 | /* can't autostop if ports are connected */ |
503 | any_connected |= (status & RH_PS_CCS); | |
504 | ||
1da177e4 LT |
505 | if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC |
506 | | RH_PS_OCIC | RH_PS_PRSC)) { | |
507 | changed = 1; | |
508 | if (i < 7) | |
509 | buf [0] |= 1 << (i + 1); | |
510 | else | |
511 | buf [1] |= 1 << (i - 7); | |
1da177e4 | 512 | } |
d413984a | 513 | } |
1da177e4 | 514 | |
541c7d43 AS |
515 | if (ohci_root_hub_state_changes(ohci, changed, |
516 | any_connected, rhsc_status)) | |
517 | set_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
518 | else | |
519 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
520 | ||
d413984a | 521 | |
1da177e4 LT |
522 | done: |
523 | spin_unlock_irqrestore (&ohci->lock, flags); | |
524 | ||
1da177e4 LT |
525 | return changed ? length : 0; |
526 | } | |
42b59eba | 527 | EXPORT_SYMBOL_GPL(ohci_hub_status_data); |
1da177e4 LT |
528 | |
529 | /*-------------------------------------------------------------------------*/ | |
530 | ||
531 | static void | |
532 | ohci_hub_descriptor ( | |
533 | struct ohci_hcd *ohci, | |
534 | struct usb_hub_descriptor *desc | |
535 | ) { | |
536 | u32 rh = roothub_a (ohci); | |
1da177e4 LT |
537 | u16 temp; |
538 | ||
7a2d2672 | 539 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 LT |
540 | desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24; |
541 | desc->bHubContrCurrent = 0; | |
542 | ||
fdd13b36 DB |
543 | desc->bNbrPorts = ohci->num_ports; |
544 | temp = 1 + (ohci->num_ports / 8); | |
1da177e4 LT |
545 | desc->bDescLength = 7 + 2 * temp; |
546 | ||
db42a4c9 | 547 | temp = HUB_CHAR_COMMON_LPSM | HUB_CHAR_COMMON_OCPM; |
1da177e4 | 548 | if (rh & RH_A_NPS) /* no power switching? */ |
db42a4c9 | 549 | temp |= HUB_CHAR_NO_LPSM; |
dd9048af | 550 | if (rh & RH_A_PSM) /* per-port power switching? */ |
db42a4c9 | 551 | temp |= HUB_CHAR_INDV_PORT_LPSM; |
1da177e4 | 552 | if (rh & RH_A_NOCP) /* no overcurrent reporting? */ |
db42a4c9 | 553 | temp |= HUB_CHAR_NO_OCPM; |
1da177e4 | 554 | else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */ |
db42a4c9 | 555 | temp |= HUB_CHAR_INDV_PORT_OCPM; |
7c71c6e6 | 556 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 | 557 | |
da13051c | 558 | /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
1da177e4 | 559 | rh = roothub_b (ohci); |
dbe79bbe JY |
560 | memset(desc->u.hs.DeviceRemovable, 0xff, |
561 | sizeof(desc->u.hs.DeviceRemovable)); | |
562 | desc->u.hs.DeviceRemovable[0] = rh & RH_B_DR; | |
fdd13b36 | 563 | if (ohci->num_ports > 7) { |
dbe79bbe JY |
564 | desc->u.hs.DeviceRemovable[1] = (rh & RH_B_DR) >> 8; |
565 | desc->u.hs.DeviceRemovable[2] = 0xff; | |
1da177e4 | 566 | } else |
dbe79bbe | 567 | desc->u.hs.DeviceRemovable[1] = 0xff; |
1da177e4 LT |
568 | } |
569 | ||
570 | /*-------------------------------------------------------------------------*/ | |
571 | ||
572 | #ifdef CONFIG_USB_OTG | |
573 | ||
574 | static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port) | |
575 | { | |
576 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
577 | u32 status; | |
578 | ||
579 | if (!port) | |
580 | return -EINVAL; | |
581 | port--; | |
582 | ||
583 | /* start port reset before HNP protocol times out */ | |
584 | status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]); | |
585 | if (!(status & RH_PS_CCS)) | |
586 | return -ENODEV; | |
587 | ||
37ebb549 | 588 | /* hub_wq will finish the reset later */ |
1da177e4 LT |
589 | ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]); |
590 | return 0; | |
591 | } | |
592 | ||
1da177e4 LT |
593 | #else |
594 | ||
595 | #define ohci_start_port_reset NULL | |
596 | ||
597 | #endif | |
598 | ||
599 | /*-------------------------------------------------------------------------*/ | |
600 | ||
601 | ||
602 | /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, | |
603 | * not necessarily continuous ... to guard against resume signaling. | |
1da177e4 | 604 | */ |
1da177e4 | 605 | #define PORT_RESET_MSEC 50 |
1da177e4 LT |
606 | |
607 | /* this timer value might be vendor-specific ... */ | |
608 | #define PORT_RESET_HW_MSEC 10 | |
609 | ||
610 | /* wrap-aware logic morphed from <linux/jiffies.h> */ | |
611 | #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0) | |
612 | ||
37ebb549 | 613 | /* called from some task, normally hub_wq */ |
23d10a9e | 614 | static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port) |
1da177e4 LT |
615 | { |
616 | __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port]; | |
1b7b61c5 | 617 | u32 temp = 0; |
1da177e4 LT |
618 | u16 now = ohci_readl(ohci, &ohci->regs->fmnumber); |
619 | u16 reset_done = now + PORT_RESET_MSEC; | |
e01e7fe3 | 620 | int limit_1 = DIV_ROUND_UP(PORT_RESET_MSEC, PORT_RESET_HW_MSEC); |
1da177e4 LT |
621 | |
622 | /* build a "continuous enough" reset signal, with up to | |
623 | * 3msec gap between pulses. scheduler HZ==100 must work; | |
624 | * this might need to be deadline-scheduled. | |
625 | */ | |
626 | do { | |
e01e7fe3 DB |
627 | int limit_2; |
628 | ||
1da177e4 | 629 | /* spin until any current reset finishes */ |
e01e7fe3 DB |
630 | limit_2 = PORT_RESET_HW_MSEC * 2; |
631 | while (--limit_2 >= 0) { | |
1da177e4 | 632 | temp = ohci_readl (ohci, portstat); |
23d10a9e TO |
633 | /* handle e.g. CardBus eject */ |
634 | if (temp == ~(u32)0) | |
635 | return -ESHUTDOWN; | |
1da177e4 LT |
636 | if (!(temp & RH_PS_PRS)) |
637 | break; | |
638 | udelay (500); | |
dd9048af | 639 | } |
1da177e4 | 640 | |
e01e7fe3 DB |
641 | /* timeout (a hardware error) has been observed when |
642 | * EHCI sets CF while this driver is resetting a port; | |
643 | * presumably other disconnect paths might do it too. | |
644 | */ | |
645 | if (limit_2 < 0) { | |
646 | ohci_dbg(ohci, | |
647 | "port[%d] reset timeout, stat %08x\n", | |
648 | port, temp); | |
649 | break; | |
650 | } | |
651 | ||
1da177e4 LT |
652 | if (!(temp & RH_PS_CCS)) |
653 | break; | |
654 | if (temp & RH_PS_PRSC) | |
655 | ohci_writel (ohci, RH_PS_PRSC, portstat); | |
656 | ||
657 | /* start the next reset, sleep till it's probably done */ | |
658 | ohci_writel (ohci, RH_PS_PRS, portstat); | |
659 | msleep(PORT_RESET_HW_MSEC); | |
660 | now = ohci_readl(ohci, &ohci->regs->fmnumber); | |
e01e7fe3 DB |
661 | } while (tick_before(now, reset_done) && --limit_1 >= 0); |
662 | ||
663 | /* caller synchronizes using PRSC ... and handles PRS | |
664 | * still being set when this returns. | |
665 | */ | |
23d10a9e TO |
666 | |
667 | return 0; | |
1da177e4 LT |
668 | } |
669 | ||
42b59eba | 670 | int ohci_hub_control( |
1da177e4 LT |
671 | struct usb_hcd *hcd, |
672 | u16 typeReq, | |
673 | u16 wValue, | |
674 | u16 wIndex, | |
675 | char *buf, | |
676 | u16 wLength | |
677 | ) { | |
678 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fcf7d214 | 679 | int ports = ohci->num_ports; |
1da177e4 LT |
680 | u32 temp; |
681 | int retval = 0; | |
682 | ||
541c7d43 | 683 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8de98402 BH |
684 | return -ESHUTDOWN; |
685 | ||
1da177e4 LT |
686 | switch (typeReq) { |
687 | case ClearHubFeature: | |
688 | switch (wValue) { | |
689 | case C_HUB_OVER_CURRENT: | |
690 | ohci_writel (ohci, RH_HS_OCIC, | |
691 | &ohci->regs->roothub.status); | |
692 | case C_HUB_LOCAL_POWER: | |
693 | break; | |
694 | default: | |
695 | goto error; | |
696 | } | |
697 | break; | |
698 | case ClearPortFeature: | |
699 | if (!wIndex || wIndex > ports) | |
700 | goto error; | |
701 | wIndex--; | |
702 | ||
703 | switch (wValue) { | |
704 | case USB_PORT_FEAT_ENABLE: | |
705 | temp = RH_PS_CCS; | |
706 | break; | |
707 | case USB_PORT_FEAT_C_ENABLE: | |
708 | temp = RH_PS_PESC; | |
709 | break; | |
710 | case USB_PORT_FEAT_SUSPEND: | |
711 | temp = RH_PS_POCI; | |
1da177e4 LT |
712 | break; |
713 | case USB_PORT_FEAT_C_SUSPEND: | |
714 | temp = RH_PS_PSSC; | |
715 | break; | |
716 | case USB_PORT_FEAT_POWER: | |
717 | temp = RH_PS_LSDA; | |
718 | break; | |
719 | case USB_PORT_FEAT_C_CONNECTION: | |
720 | temp = RH_PS_CSC; | |
721 | break; | |
722 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
723 | temp = RH_PS_OCIC; | |
724 | break; | |
725 | case USB_PORT_FEAT_C_RESET: | |
726 | temp = RH_PS_PRSC; | |
727 | break; | |
728 | default: | |
729 | goto error; | |
730 | } | |
731 | ohci_writel (ohci, temp, | |
732 | &ohci->regs->roothub.portstatus [wIndex]); | |
733 | // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]); | |
734 | break; | |
735 | case GetHubDescriptor: | |
736 | ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf); | |
737 | break; | |
738 | case GetHubStatus: | |
739 | temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE); | |
a5abdeaf | 740 | put_unaligned_le32(temp, buf); |
1da177e4 LT |
741 | break; |
742 | case GetPortStatus: | |
743 | if (!wIndex || wIndex > ports) | |
744 | goto error; | |
745 | wIndex--; | |
746 | temp = roothub_portstatus (ohci, wIndex); | |
a5abdeaf | 747 | put_unaligned_le32(temp, buf); |
1da177e4 | 748 | |
00b033bb ON |
749 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ |
750 | dbg_port(ohci, "GetStatus", wIndex, temp); | |
1da177e4 LT |
751 | break; |
752 | case SetHubFeature: | |
753 | switch (wValue) { | |
754 | case C_HUB_OVER_CURRENT: | |
755 | // FIXME: this can be cleared, yes? | |
756 | case C_HUB_LOCAL_POWER: | |
757 | break; | |
758 | default: | |
759 | goto error; | |
760 | } | |
761 | break; | |
762 | case SetPortFeature: | |
763 | if (!wIndex || wIndex > ports) | |
764 | goto error; | |
765 | wIndex--; | |
766 | switch (wValue) { | |
767 | case USB_PORT_FEAT_SUSPEND: | |
768 | #ifdef CONFIG_USB_OTG | |
769 | if (hcd->self.otg_port == (wIndex + 1) | |
770 | && hcd->self.b_hnp_enable) | |
e8b24450 | 771 | ohci->start_hnp(ohci); |
1da177e4 LT |
772 | else |
773 | #endif | |
774 | ohci_writel (ohci, RH_PS_PSS, | |
775 | &ohci->regs->roothub.portstatus [wIndex]); | |
776 | break; | |
777 | case USB_PORT_FEAT_POWER: | |
778 | ohci_writel (ohci, RH_PS_PPS, | |
779 | &ohci->regs->roothub.portstatus [wIndex]); | |
780 | break; | |
781 | case USB_PORT_FEAT_RESET: | |
23d10a9e | 782 | retval = root_port_reset (ohci, wIndex); |
1da177e4 LT |
783 | break; |
784 | default: | |
785 | goto error; | |
786 | } | |
787 | break; | |
788 | ||
789 | default: | |
790 | error: | |
791 | /* "protocol stall" on error */ | |
792 | retval = -EPIPE; | |
793 | } | |
794 | return retval; | |
795 | } | |
42b59eba | 796 | EXPORT_SYMBOL_GPL(ohci_hub_control); |