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 | ||
7d12e780 DH |
42 | static void dl_done_list (struct ohci_hcd *); |
43 | static void finish_unlinks (struct ohci_hcd *, u16); | |
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 | } |
7d12e780 DH |
90 | dl_done_list (ohci); |
91 | finish_unlinks (ohci, ohci_frame_no(ohci)); | |
1da177e4 LT |
92 | |
93 | /* maybe resume can wake root hub */ | |
58a97ffe | 94 | if (ohci_to_hcd(ohci)->self.root_hub->do_remote_wakeup || autostop) { |
1da177e4 | 95 | ohci->hc_control |= OHCI_CTRL_RWE; |
58a97ffe | 96 | } else { |
5f47493c AS |
97 | ohci_writel(ohci, OHCI_INTR_RHSC | OHCI_INTR_RD, |
98 | &ohci->regs->intrdisable); | |
1da177e4 | 99 | ohci->hc_control &= ~OHCI_CTRL_RWE; |
1f7e1a3b | 100 | } |
1da177e4 | 101 | |
f197b2c5 DB |
102 | /* Suspend hub ... this is the "global (to this bus) suspend" mode, |
103 | * which doesn't imply ports will first be individually suspended. | |
104 | */ | |
1da177e4 LT |
105 | ohci->hc_control &= ~OHCI_CTRL_HCFS; |
106 | ohci->hc_control |= OHCI_USB_SUSPEND; | |
107 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
108 | (void) ohci_readl (ohci, &ohci->regs->control); | |
109 | ||
110 | /* no resumes until devices finish suspending */ | |
8d1a243b AS |
111 | if (!autostop) { |
112 | ohci->next_statechange = jiffies + msecs_to_jiffies (5); | |
113 | ohci->autostop = 0; | |
b7463c71 | 114 | ohci->rh_state = OHCI_RH_SUSPENDED; |
8d1a243b | 115 | } |
d413984a | 116 | |
1da177e4 | 117 | done: |
1da177e4 LT |
118 | return status; |
119 | } | |
120 | ||
121 | static inline struct ed *find_head (struct ed *ed) | |
122 | { | |
123 | /* for bulk and control lists */ | |
124 | while (ed->ed_prev) | |
125 | ed = ed->ed_prev; | |
126 | return ed; | |
127 | } | |
128 | ||
129 | /* caller has locked the root hub */ | |
8d1a243b AS |
130 | static int ohci_rh_resume (struct ohci_hcd *ohci) |
131 | __releases(ohci->lock) | |
132 | __acquires(ohci->lock) | |
1da177e4 | 133 | { |
8d1a243b | 134 | struct usb_hcd *hcd = ohci_to_hcd (ohci); |
1da177e4 LT |
135 | u32 temp, enables; |
136 | int status = -EINPROGRESS; | |
8d1a243b | 137 | int autostopped = ohci->autostop; |
8de98402 | 138 | |
8d1a243b | 139 | ohci->autostop = 0; |
1da177e4 LT |
140 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); |
141 | ||
142 | if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { | |
f197b2c5 | 143 | /* this can happen after resuming a swsusp snapshot */ |
b7463c71 | 144 | if (ohci->rh_state != OHCI_RH_RUNNING) { |
1da177e4 LT |
145 | ohci_dbg (ohci, "BIOS/SMM active, control %03x\n", |
146 | ohci->hc_control); | |
147 | status = -EBUSY; | |
148 | /* this happens when pmcore resumes HC then root */ | |
149 | } else { | |
150 | ohci_dbg (ohci, "duplicate resume\n"); | |
151 | status = 0; | |
152 | } | |
153 | } else switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
154 | case OHCI_USB_SUSPEND: | |
155 | ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); | |
156 | ohci->hc_control |= OHCI_USB_RESUME; | |
157 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
158 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
159 | ohci_dbg (ohci, "%s root hub\n", |
160 | autostopped ? "auto-start" : "resume"); | |
1da177e4 LT |
161 | break; |
162 | case OHCI_USB_RESUME: | |
163 | /* HCFS changes sometime after INTR_RD */ | |
1b7be3c0 | 164 | ohci_dbg(ohci, "%swakeup root hub\n", |
583ceada | 165 | autostopped ? "auto-" : ""); |
1da177e4 LT |
166 | break; |
167 | case OHCI_USB_OPER: | |
f197b2c5 DB |
168 | /* this can happen after resuming a swsusp snapshot */ |
169 | ohci_dbg (ohci, "snapshot resume? reinit\n"); | |
170 | status = -EBUSY; | |
1da177e4 LT |
171 | break; |
172 | default: /* RESET, we lost power */ | |
f197b2c5 | 173 | ohci_dbg (ohci, "lost power\n"); |
1da177e4 LT |
174 | status = -EBUSY; |
175 | } | |
1da177e4 | 176 | if (status == -EBUSY) { |
8d1a243b | 177 | if (!autostopped) { |
8d1a243b AS |
178 | spin_unlock_irq (&ohci->lock); |
179 | (void) ohci_init (ohci); | |
180 | status = ohci_restart (ohci); | |
d576bb9f MH |
181 | |
182 | usb_root_hub_lost_power(hcd->self.root_hub); | |
183 | ||
8d1a243b AS |
184 | spin_lock_irq (&ohci->lock); |
185 | } | |
186 | return status; | |
1da177e4 LT |
187 | } |
188 | if (status != -EINPROGRESS) | |
189 | return status; | |
8d1a243b AS |
190 | if (autostopped) |
191 | goto skip_resume; | |
192 | spin_unlock_irq (&ohci->lock); | |
1da177e4 | 193 | |
1da177e4 | 194 | /* Some controllers (lucent erratum) need extra-long delays */ |
f197b2c5 | 195 | msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); |
1da177e4 LT |
196 | |
197 | temp = ohci_readl (ohci, &ohci->regs->control); | |
198 | temp &= OHCI_CTRL_HCFS; | |
199 | if (temp != OHCI_USB_RESUME) { | |
200 | ohci_err (ohci, "controller won't resume\n"); | |
565402ba | 201 | spin_lock_irq(&ohci->lock); |
1da177e4 LT |
202 | return -EBUSY; |
203 | } | |
204 | ||
205 | /* disable old schedule state, reinit from scratch */ | |
206 | ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); | |
207 | ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent); | |
208 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); | |
209 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent); | |
210 | ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent); | |
211 | ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); | |
212 | ||
213 | /* Sometimes PCI D3 suspend trashes frame timings ... */ | |
214 | periodic_reinit (ohci); | |
215 | ||
8d1a243b AS |
216 | /* the following code is executed with ohci->lock held and |
217 | * irqs disabled if and only if autostopped is true | |
218 | */ | |
219 | ||
220 | skip_resume: | |
1da177e4 LT |
221 | /* interrupts might have been disabled */ |
222 | ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable); | |
223 | if (ohci->ed_rm_list) | |
224 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable); | |
1da177e4 LT |
225 | |
226 | /* Then re-enable operations */ | |
227 | ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control); | |
228 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
229 | if (!autostopped) |
230 | msleep (3); | |
1da177e4 | 231 | |
6a9062f3 DB |
232 | temp = ohci->hc_control; |
233 | temp &= OHCI_CTRL_RWC; | |
234 | temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; | |
1da177e4 LT |
235 | ohci->hc_control = temp; |
236 | ohci_writel (ohci, temp, &ohci->regs->control); | |
237 | (void) ohci_readl (ohci, &ohci->regs->control); | |
238 | ||
239 | /* TRSMRCY */ | |
8d1a243b AS |
240 | if (!autostopped) { |
241 | msleep (10); | |
242 | spin_lock_irq (&ohci->lock); | |
243 | } | |
244 | /* now ohci->lock is always held and irqs are always disabled */ | |
1da177e4 | 245 | |
d413984a DB |
246 | /* keep it alive for more than ~5x suspend + resume costs */ |
247 | ohci->next_statechange = jiffies + STATECHANGE_DELAY; | |
1da177e4 LT |
248 | |
249 | /* maybe turn schedules back on */ | |
250 | enables = 0; | |
251 | temp = 0; | |
252 | if (!ohci->ed_rm_list) { | |
253 | if (ohci->ed_controltail) { | |
254 | ohci_writel (ohci, | |
255 | find_head (ohci->ed_controltail)->dma, | |
256 | &ohci->regs->ed_controlhead); | |
257 | enables |= OHCI_CTRL_CLE; | |
258 | temp |= OHCI_CLF; | |
259 | } | |
260 | if (ohci->ed_bulktail) { | |
261 | ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma, | |
262 | &ohci->regs->ed_bulkhead); | |
263 | enables |= OHCI_CTRL_BLE; | |
264 | temp |= OHCI_BLF; | |
265 | } | |
266 | } | |
267 | if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) | |
268 | enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; | |
269 | if (enables) { | |
270 | ohci_dbg (ohci, "restarting schedules ... %08x\n", enables); | |
271 | ohci->hc_control |= enables; | |
272 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
273 | if (temp) | |
274 | ohci_writel (ohci, temp, &ohci->regs->cmdstatus); | |
275 | (void) ohci_readl (ohci, &ohci->regs->control); | |
276 | } | |
277 | ||
b7463c71 | 278 | ohci->rh_state = OHCI_RH_RUNNING; |
1da177e4 LT |
279 | return 0; |
280 | } | |
281 | ||
8d1a243b AS |
282 | static int ohci_bus_suspend (struct usb_hcd *hcd) |
283 | { | |
284 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
285 | int rc; | |
286 | ||
287 | spin_lock_irq (&ohci->lock); | |
288 | ||
541c7d43 | 289 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8d1a243b AS |
290 | rc = -ESHUTDOWN; |
291 | else | |
292 | rc = ohci_rh_suspend (ohci, 0); | |
293 | spin_unlock_irq (&ohci->lock); | |
294 | return rc; | |
295 | } | |
296 | ||
297 | static int ohci_bus_resume (struct usb_hcd *hcd) | |
298 | { | |
299 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
300 | int rc; | |
301 | ||
302 | if (time_before (jiffies, ohci->next_statechange)) | |
303 | msleep(5); | |
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_resume (ohci); | |
311 | spin_unlock_irq (&ohci->lock); | |
312 | ||
313 | /* poll until we know a device is connected or we autostop */ | |
314 | if (rc == 0) | |
315 | usb_hcd_poll_rh_status(hcd); | |
316 | return rc; | |
317 | } | |
318 | ||
43bbb7e0 | 319 | /* Carry out the final steps of resuming the controller device */ |
c4828d96 | 320 | static void __maybe_unused ohci_finish_controller_resume(struct usb_hcd *hcd) |
43bbb7e0 AS |
321 | { |
322 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
323 | int port; | |
324 | bool need_reinit = false; | |
325 | ||
326 | /* See if the controller is already running or has been reset */ | |
327 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); | |
328 | if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { | |
329 | need_reinit = true; | |
330 | } else { | |
331 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
332 | case OHCI_USB_OPER: | |
333 | case OHCI_USB_RESET: | |
334 | need_reinit = true; | |
335 | } | |
336 | } | |
337 | ||
338 | /* If needed, reinitialize and suspend the root hub */ | |
339 | if (need_reinit) { | |
340 | spin_lock_irq(&ohci->lock); | |
43bbb7e0 | 341 | ohci_rh_resume(ohci); |
43bbb7e0 | 342 | ohci_rh_suspend(ohci, 0); |
43bbb7e0 AS |
343 | spin_unlock_irq(&ohci->lock); |
344 | } | |
345 | ||
346 | /* Normally just turn on port power and enable interrupts */ | |
347 | else { | |
348 | ohci_dbg(ohci, "powerup ports\n"); | |
349 | for (port = 0; port < ohci->num_ports; port++) | |
350 | ohci_writel(ohci, RH_PS_PPS, | |
351 | &ohci->regs->roothub.portstatus[port]); | |
352 | ||
353 | ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrenable); | |
354 | ohci_readl(ohci, &ohci->regs->intrenable); | |
355 | msleep(20); | |
356 | } | |
ee0b9be8 | 357 | |
a8b43c00 | 358 | usb_hcd_resume_root_hub(hcd); |
43bbb7e0 AS |
359 | } |
360 | ||
1f9fc882 AS |
361 | /* Carry out polling-, autostop-, and autoresume-related state changes */ |
362 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
71b7497c | 363 | int any_connected, int rhsc_status) |
1f9fc882 AS |
364 | { |
365 | int poll_rh = 1; | |
71b7497c | 366 | int rhsc_enable; |
1f9fc882 | 367 | |
ee0b9be8 | 368 | /* Some broken controllers never turn off RHSC in the interrupt |
4a511bc3 AS |
369 | * status register. For their sake we won't re-enable RHSC |
370 | * interrupts if the interrupt bit is already active. | |
371 | */ | |
4a511bc3 AS |
372 | rhsc_enable = ohci_readl(ohci, &ohci->regs->intrenable) & |
373 | OHCI_INTR_RHSC; | |
1f9fc882 | 374 | |
4a511bc3 | 375 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { |
1f9fc882 | 376 | case OHCI_USB_OPER: |
4a511bc3 AS |
377 | /* If no status changes are pending, enable RHSC interrupts. */ |
378 | if (!rhsc_enable && !rhsc_status && !changed) { | |
379 | rhsc_enable = OHCI_INTR_RHSC; | |
380 | ohci_writel(ohci, rhsc_enable, &ohci->regs->intrenable); | |
b5fb454f AS |
381 | } |
382 | ||
383 | /* Keep on polling until we know a device is connected | |
384 | * and RHSC is enabled, or until we autostop. | |
385 | */ | |
1f9fc882 AS |
386 | if (!ohci->autostop) { |
387 | if (any_connected || | |
388 | !device_may_wakeup(&ohci_to_hcd(ohci) | |
389 | ->self.root_hub->dev)) { | |
4a511bc3 | 390 | if (rhsc_enable) |
1f9fc882 AS |
391 | poll_rh = 0; |
392 | } else { | |
393 | ohci->autostop = 1; | |
394 | ohci->next_statechange = jiffies + HZ; | |
395 | } | |
396 | ||
397 | /* if no devices have been attached for one second, autostop */ | |
398 | } else { | |
399 | if (changed || any_connected) { | |
400 | ohci->autostop = 0; | |
401 | ohci->next_statechange = jiffies + | |
402 | STATECHANGE_DELAY; | |
4a511bc3 | 403 | } else if (time_after_eq(jiffies, |
1f9fc882 AS |
404 | ohci->next_statechange) |
405 | && !ohci->ed_rm_list | |
406 | && !(ohci->hc_control & | |
407 | OHCI_SCHED_ENABLES)) { | |
408 | ohci_rh_suspend(ohci, 1); | |
4a511bc3 AS |
409 | if (rhsc_enable) |
410 | poll_rh = 0; | |
1f9fc882 AS |
411 | } |
412 | } | |
413 | break; | |
414 | ||
1f9fc882 AS |
415 | case OHCI_USB_SUSPEND: |
416 | case OHCI_USB_RESUME: | |
4a511bc3 | 417 | /* if there is a port change, autostart or ask to be resumed */ |
1f9fc882 AS |
418 | if (changed) { |
419 | if (ohci->autostop) | |
420 | ohci_rh_resume(ohci); | |
421 | else | |
422 | usb_hcd_resume_root_hub(ohci_to_hcd(ohci)); | |
71b7497c AS |
423 | |
424 | /* If remote wakeup is disabled, stop polling */ | |
425 | } else if (!ohci->autostop && | |
426 | !ohci_to_hcd(ohci)->self.root_hub-> | |
427 | do_remote_wakeup) { | |
428 | poll_rh = 0; | |
429 | ||
1f9fc882 | 430 | } else { |
71b7497c AS |
431 | /* If no status changes are pending, |
432 | * enable RHSC interrupts | |
433 | */ | |
434 | if (!rhsc_enable && !rhsc_status) { | |
4a511bc3 AS |
435 | rhsc_enable = OHCI_INTR_RHSC; |
436 | ohci_writel(ohci, rhsc_enable, | |
b5fb454f | 437 | &ohci->regs->intrenable); |
4a511bc3 | 438 | } |
71b7497c | 439 | /* Keep polling until RHSC is enabled */ |
4a511bc3 AS |
440 | if (rhsc_enable) |
441 | poll_rh = 0; | |
1f9fc882 AS |
442 | } |
443 | break; | |
444 | } | |
445 | return poll_rh; | |
446 | } | |
447 | ||
448 | #else /* CONFIG_PM */ | |
449 | ||
450 | static inline int ohci_rh_resume(struct ohci_hcd *ohci) | |
451 | { | |
452 | return 0; | |
453 | } | |
454 | ||
455 | /* Carry out polling-related state changes. | |
456 | * autostop isn't used when CONFIG_PM is turned off. | |
457 | */ | |
458 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
71b7497c | 459 | int any_connected, int rhsc_status) |
1f9fc882 | 460 | { |
b5fb454f | 461 | /* If RHSC is enabled, don't poll */ |
09ca8adb | 462 | if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC) |
b5fb454f AS |
463 | return 0; |
464 | ||
71b7497c AS |
465 | /* If status changes are pending, continue polling. |
466 | * Conversely, if no status changes are pending but the RHSC | |
467 | * status bit was set, then RHSC may be broken so continue polling. | |
468 | */ | |
469 | if (changed || rhsc_status) | |
470 | return 1; | |
471 | ||
472 | /* It's safe to re-enable RHSC interrupts */ | |
473 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable); | |
474 | return 0; | |
1f9fc882 AS |
475 | } |
476 | ||
8ad7fe16 | 477 | #endif /* CONFIG_PM */ |
1da177e4 LT |
478 | |
479 | /*-------------------------------------------------------------------------*/ | |
480 | ||
481 | /* build "status change" packet (one or two bytes) from HC registers */ | |
482 | ||
483 | static int | |
484 | ohci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
485 | { | |
486 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fdd13b36 | 487 | int i, changed = 0, length = 1; |
052ac01a | 488 | int any_connected = 0; |
71b7497c | 489 | int rhsc_status; |
1da177e4 LT |
490 | unsigned long flags; |
491 | ||
492 | spin_lock_irqsave (&ohci->lock, flags); | |
541c7d43 | 493 | if (!HCD_HW_ACCESSIBLE(hcd)) |
6fd75b19 | 494 | goto done; |
1da177e4 | 495 | |
fdd13b36 DB |
496 | /* undocumented erratum seen on at least rev D */ |
497 | if ((ohci->flags & OHCI_QUIRK_AMD756) | |
498 | && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) { | |
499 | ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n", | |
1da177e4 LT |
500 | ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP); |
501 | /* retry later; "should not happen" */ | |
502 | goto done; | |
503 | } | |
504 | ||
505 | /* init status */ | |
506 | if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC)) | |
507 | buf [0] = changed = 1; | |
508 | else | |
509 | buf [0] = 0; | |
fdd13b36 | 510 | if (ohci->num_ports > 7) { |
1da177e4 LT |
511 | buf [1] = 0; |
512 | length++; | |
513 | } | |
514 | ||
71b7497c AS |
515 | /* Clear the RHSC status flag before reading the port statuses */ |
516 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrstatus); | |
517 | rhsc_status = ohci_readl(ohci, &ohci->regs->intrstatus) & | |
518 | OHCI_INTR_RHSC; | |
519 | ||
1da177e4 | 520 | /* look at each port */ |
fdd13b36 | 521 | for (i = 0; i < ohci->num_ports; i++) { |
1da177e4 LT |
522 | u32 status = roothub_portstatus (ohci, i); |
523 | ||
8d1a243b AS |
524 | /* can't autostop if ports are connected */ |
525 | any_connected |= (status & RH_PS_CCS); | |
526 | ||
1da177e4 LT |
527 | if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC |
528 | | RH_PS_OCIC | RH_PS_PRSC)) { | |
529 | changed = 1; | |
530 | if (i < 7) | |
531 | buf [0] |= 1 << (i + 1); | |
532 | else | |
533 | buf [1] |= 1 << (i - 7); | |
1da177e4 | 534 | } |
d413984a | 535 | } |
1da177e4 | 536 | |
541c7d43 AS |
537 | if (ohci_root_hub_state_changes(ohci, changed, |
538 | any_connected, rhsc_status)) | |
539 | set_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
540 | else | |
541 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
542 | ||
d413984a | 543 | |
1da177e4 LT |
544 | done: |
545 | spin_unlock_irqrestore (&ohci->lock, flags); | |
546 | ||
1da177e4 LT |
547 | return changed ? length : 0; |
548 | } | |
549 | ||
550 | /*-------------------------------------------------------------------------*/ | |
551 | ||
552 | static void | |
553 | ohci_hub_descriptor ( | |
554 | struct ohci_hcd *ohci, | |
555 | struct usb_hub_descriptor *desc | |
556 | ) { | |
557 | u32 rh = roothub_a (ohci); | |
1da177e4 LT |
558 | u16 temp; |
559 | ||
560 | desc->bDescriptorType = 0x29; | |
561 | desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24; | |
562 | desc->bHubContrCurrent = 0; | |
563 | ||
fdd13b36 DB |
564 | desc->bNbrPorts = ohci->num_ports; |
565 | temp = 1 + (ohci->num_ports / 8); | |
1da177e4 LT |
566 | desc->bDescLength = 7 + 2 * temp; |
567 | ||
568 | temp = 0; | |
569 | if (rh & RH_A_NPS) /* no power switching? */ | |
570 | temp |= 0x0002; | |
dd9048af | 571 | if (rh & RH_A_PSM) /* per-port power switching? */ |
1da177e4 LT |
572 | temp |= 0x0001; |
573 | if (rh & RH_A_NOCP) /* no overcurrent reporting? */ | |
574 | temp |= 0x0010; | |
575 | else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */ | |
576 | temp |= 0x0008; | |
577 | desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp); | |
578 | ||
da13051c | 579 | /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
1da177e4 | 580 | rh = roothub_b (ohci); |
dbe79bbe JY |
581 | memset(desc->u.hs.DeviceRemovable, 0xff, |
582 | sizeof(desc->u.hs.DeviceRemovable)); | |
583 | desc->u.hs.DeviceRemovable[0] = rh & RH_B_DR; | |
fdd13b36 | 584 | if (ohci->num_ports > 7) { |
dbe79bbe JY |
585 | desc->u.hs.DeviceRemovable[1] = (rh & RH_B_DR) >> 8; |
586 | desc->u.hs.DeviceRemovable[2] = 0xff; | |
1da177e4 | 587 | } else |
dbe79bbe | 588 | desc->u.hs.DeviceRemovable[1] = 0xff; |
1da177e4 LT |
589 | } |
590 | ||
591 | /*-------------------------------------------------------------------------*/ | |
592 | ||
593 | #ifdef CONFIG_USB_OTG | |
594 | ||
595 | static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port) | |
596 | { | |
597 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
598 | u32 status; | |
599 | ||
600 | if (!port) | |
601 | return -EINVAL; | |
602 | port--; | |
603 | ||
604 | /* start port reset before HNP protocol times out */ | |
605 | status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]); | |
606 | if (!(status & RH_PS_CCS)) | |
607 | return -ENODEV; | |
608 | ||
609 | /* khubd will finish the reset later */ | |
610 | ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]); | |
611 | return 0; | |
612 | } | |
613 | ||
1da177e4 LT |
614 | #else |
615 | ||
616 | #define ohci_start_port_reset NULL | |
617 | ||
618 | #endif | |
619 | ||
620 | /*-------------------------------------------------------------------------*/ | |
621 | ||
622 | ||
623 | /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, | |
624 | * not necessarily continuous ... to guard against resume signaling. | |
625 | * The short timeout is safe for non-root hubs, and is backward-compatible | |
626 | * with earlier Linux hosts. | |
627 | */ | |
628 | #ifdef CONFIG_USB_SUSPEND | |
629 | #define PORT_RESET_MSEC 50 | |
630 | #else | |
631 | #define PORT_RESET_MSEC 10 | |
632 | #endif | |
633 | ||
634 | /* this timer value might be vendor-specific ... */ | |
635 | #define PORT_RESET_HW_MSEC 10 | |
636 | ||
637 | /* wrap-aware logic morphed from <linux/jiffies.h> */ | |
638 | #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0) | |
639 | ||
640 | /* called from some task, normally khubd */ | |
23d10a9e | 641 | static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port) |
1da177e4 LT |
642 | { |
643 | __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port]; | |
1b7b61c5 | 644 | u32 temp = 0; |
1da177e4 LT |
645 | u16 now = ohci_readl(ohci, &ohci->regs->fmnumber); |
646 | u16 reset_done = now + PORT_RESET_MSEC; | |
e01e7fe3 | 647 | int limit_1 = DIV_ROUND_UP(PORT_RESET_MSEC, PORT_RESET_HW_MSEC); |
1da177e4 LT |
648 | |
649 | /* build a "continuous enough" reset signal, with up to | |
650 | * 3msec gap between pulses. scheduler HZ==100 must work; | |
651 | * this might need to be deadline-scheduled. | |
652 | */ | |
653 | do { | |
e01e7fe3 DB |
654 | int limit_2; |
655 | ||
1da177e4 | 656 | /* spin until any current reset finishes */ |
e01e7fe3 DB |
657 | limit_2 = PORT_RESET_HW_MSEC * 2; |
658 | while (--limit_2 >= 0) { | |
1da177e4 | 659 | temp = ohci_readl (ohci, portstat); |
23d10a9e TO |
660 | /* handle e.g. CardBus eject */ |
661 | if (temp == ~(u32)0) | |
662 | return -ESHUTDOWN; | |
1da177e4 LT |
663 | if (!(temp & RH_PS_PRS)) |
664 | break; | |
665 | udelay (500); | |
dd9048af | 666 | } |
1da177e4 | 667 | |
e01e7fe3 DB |
668 | /* timeout (a hardware error) has been observed when |
669 | * EHCI sets CF while this driver is resetting a port; | |
670 | * presumably other disconnect paths might do it too. | |
671 | */ | |
672 | if (limit_2 < 0) { | |
673 | ohci_dbg(ohci, | |
674 | "port[%d] reset timeout, stat %08x\n", | |
675 | port, temp); | |
676 | break; | |
677 | } | |
678 | ||
1da177e4 LT |
679 | if (!(temp & RH_PS_CCS)) |
680 | break; | |
681 | if (temp & RH_PS_PRSC) | |
682 | ohci_writel (ohci, RH_PS_PRSC, portstat); | |
683 | ||
684 | /* start the next reset, sleep till it's probably done */ | |
685 | ohci_writel (ohci, RH_PS_PRS, portstat); | |
686 | msleep(PORT_RESET_HW_MSEC); | |
687 | now = ohci_readl(ohci, &ohci->regs->fmnumber); | |
e01e7fe3 DB |
688 | } while (tick_before(now, reset_done) && --limit_1 >= 0); |
689 | ||
690 | /* caller synchronizes using PRSC ... and handles PRS | |
691 | * still being set when this returns. | |
692 | */ | |
23d10a9e TO |
693 | |
694 | return 0; | |
1da177e4 LT |
695 | } |
696 | ||
697 | static int ohci_hub_control ( | |
698 | struct usb_hcd *hcd, | |
699 | u16 typeReq, | |
700 | u16 wValue, | |
701 | u16 wIndex, | |
702 | char *buf, | |
703 | u16 wLength | |
704 | ) { | |
705 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fcf7d214 | 706 | int ports = ohci->num_ports; |
1da177e4 LT |
707 | u32 temp; |
708 | int retval = 0; | |
709 | ||
541c7d43 | 710 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8de98402 BH |
711 | return -ESHUTDOWN; |
712 | ||
1da177e4 LT |
713 | switch (typeReq) { |
714 | case ClearHubFeature: | |
715 | switch (wValue) { | |
716 | case C_HUB_OVER_CURRENT: | |
717 | ohci_writel (ohci, RH_HS_OCIC, | |
718 | &ohci->regs->roothub.status); | |
719 | case C_HUB_LOCAL_POWER: | |
720 | break; | |
721 | default: | |
722 | goto error; | |
723 | } | |
724 | break; | |
725 | case ClearPortFeature: | |
726 | if (!wIndex || wIndex > ports) | |
727 | goto error; | |
728 | wIndex--; | |
729 | ||
730 | switch (wValue) { | |
731 | case USB_PORT_FEAT_ENABLE: | |
732 | temp = RH_PS_CCS; | |
733 | break; | |
734 | case USB_PORT_FEAT_C_ENABLE: | |
735 | temp = RH_PS_PESC; | |
736 | break; | |
737 | case USB_PORT_FEAT_SUSPEND: | |
738 | temp = RH_PS_POCI; | |
1da177e4 LT |
739 | break; |
740 | case USB_PORT_FEAT_C_SUSPEND: | |
741 | temp = RH_PS_PSSC; | |
742 | break; | |
743 | case USB_PORT_FEAT_POWER: | |
744 | temp = RH_PS_LSDA; | |
745 | break; | |
746 | case USB_PORT_FEAT_C_CONNECTION: | |
747 | temp = RH_PS_CSC; | |
748 | break; | |
749 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
750 | temp = RH_PS_OCIC; | |
751 | break; | |
752 | case USB_PORT_FEAT_C_RESET: | |
753 | temp = RH_PS_PRSC; | |
754 | break; | |
755 | default: | |
756 | goto error; | |
757 | } | |
758 | ohci_writel (ohci, temp, | |
759 | &ohci->regs->roothub.portstatus [wIndex]); | |
760 | // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]); | |
761 | break; | |
762 | case GetHubDescriptor: | |
763 | ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf); | |
764 | break; | |
765 | case GetHubStatus: | |
766 | temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE); | |
a5abdeaf | 767 | put_unaligned_le32(temp, buf); |
1da177e4 LT |
768 | break; |
769 | case GetPortStatus: | |
770 | if (!wIndex || wIndex > ports) | |
771 | goto error; | |
772 | wIndex--; | |
773 | temp = roothub_portstatus (ohci, wIndex); | |
a5abdeaf | 774 | put_unaligned_le32(temp, buf); |
1da177e4 LT |
775 | |
776 | #ifndef OHCI_VERBOSE_DEBUG | |
777 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ | |
778 | #endif | |
779 | dbg_port (ohci, "GetStatus", wIndex, temp); | |
780 | break; | |
781 | case SetHubFeature: | |
782 | switch (wValue) { | |
783 | case C_HUB_OVER_CURRENT: | |
784 | // FIXME: this can be cleared, yes? | |
785 | case C_HUB_LOCAL_POWER: | |
786 | break; | |
787 | default: | |
788 | goto error; | |
789 | } | |
790 | break; | |
791 | case SetPortFeature: | |
792 | if (!wIndex || wIndex > ports) | |
793 | goto error; | |
794 | wIndex--; | |
795 | switch (wValue) { | |
796 | case USB_PORT_FEAT_SUSPEND: | |
797 | #ifdef CONFIG_USB_OTG | |
798 | if (hcd->self.otg_port == (wIndex + 1) | |
799 | && hcd->self.b_hnp_enable) | |
e8b24450 | 800 | ohci->start_hnp(ohci); |
1da177e4 LT |
801 | else |
802 | #endif | |
803 | ohci_writel (ohci, RH_PS_PSS, | |
804 | &ohci->regs->roothub.portstatus [wIndex]); | |
805 | break; | |
806 | case USB_PORT_FEAT_POWER: | |
807 | ohci_writel (ohci, RH_PS_PPS, | |
808 | &ohci->regs->roothub.portstatus [wIndex]); | |
809 | break; | |
810 | case USB_PORT_FEAT_RESET: | |
23d10a9e | 811 | retval = root_port_reset (ohci, wIndex); |
1da177e4 LT |
812 | break; |
813 | default: | |
814 | goto error; | |
815 | } | |
816 | break; | |
817 | ||
818 | default: | |
819 | error: | |
820 | /* "protocol stall" on error */ | |
821 | retval = -EPIPE; | |
822 | } | |
823 | return retval; | |
824 | } | |
825 |