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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 | ||
d413984a DB |
39 | /* hcd->hub_irq_enable() */ |
40 | static void ohci_rhsc_enable (struct usb_hcd *hcd) | |
41 | { | |
42 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
43 | ||
052ac01a AS |
44 | spin_lock_irq(&ohci->lock); |
45 | if (!ohci->autostop) | |
46 | del_timer(&hcd->rh_timer); /* Prevent next poll */ | |
47 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable); | |
48 | spin_unlock_irq(&ohci->lock); | |
d413984a DB |
49 | } |
50 | ||
1da177e4 LT |
51 | #define OHCI_SCHED_ENABLES \ |
52 | (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE) | |
53 | ||
7d12e780 DH |
54 | static void dl_done_list (struct ohci_hcd *); |
55 | static void finish_unlinks (struct ohci_hcd *, u16); | |
1da177e4 | 56 | |
b1878440 AS |
57 | #ifdef CONFIG_PM |
58 | static int ohci_restart(struct ohci_hcd *ohci); | |
b1878440 | 59 | |
8d1a243b AS |
60 | static int ohci_rh_suspend (struct ohci_hcd *ohci, int autostop) |
61 | __releases(ohci->lock) | |
62 | __acquires(ohci->lock) | |
1da177e4 | 63 | { |
1da177e4 | 64 | int status = 0; |
8de98402 | 65 | |
1da177e4 LT |
66 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); |
67 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
68 | case OHCI_USB_RESUME: | |
69 | ohci_dbg (ohci, "resume/suspend?\n"); | |
70 | ohci->hc_control &= ~OHCI_CTRL_HCFS; | |
71 | ohci->hc_control |= OHCI_USB_RESET; | |
72 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
73 | (void) ohci_readl (ohci, &ohci->regs->control); | |
74 | /* FALL THROUGH */ | |
75 | case OHCI_USB_RESET: | |
76 | status = -EBUSY; | |
77 | ohci_dbg (ohci, "needs reinit!\n"); | |
78 | goto done; | |
79 | case OHCI_USB_SUSPEND: | |
8d1a243b AS |
80 | if (!ohci->autostop) { |
81 | ohci_dbg (ohci, "already suspended\n"); | |
82 | goto done; | |
83 | } | |
1da177e4 | 84 | } |
8d1a243b AS |
85 | ohci_dbg (ohci, "%s root hub\n", |
86 | autostop ? "auto-stop" : "suspend"); | |
1da177e4 LT |
87 | |
88 | /* First stop any processing */ | |
8d1a243b | 89 | if (!autostop && (ohci->hc_control & OHCI_SCHED_ENABLES)) { |
1da177e4 LT |
90 | ohci->hc_control &= ~OHCI_SCHED_ENABLES; |
91 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
92 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); | |
93 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus); | |
94 | ||
95 | /* sched disables take effect on the next frame, | |
96 | * then the last WDH could take 6+ msec | |
97 | */ | |
98 | ohci_dbg (ohci, "stopping schedules ...\n"); | |
8d1a243b AS |
99 | ohci->autostop = 0; |
100 | spin_unlock_irq (&ohci->lock); | |
101 | msleep (8); | |
102 | spin_lock_irq (&ohci->lock); | |
1da177e4 | 103 | } |
7d12e780 DH |
104 | dl_done_list (ohci); |
105 | finish_unlinks (ohci, ohci_frame_no(ohci)); | |
1da177e4 LT |
106 | |
107 | /* maybe resume can wake root hub */ | |
8d1a243b AS |
108 | if (device_may_wakeup(&ohci_to_hcd(ohci)->self.root_hub->dev) || |
109 | autostop) | |
1da177e4 | 110 | ohci->hc_control |= OHCI_CTRL_RWE; |
1f7e1a3b AS |
111 | else { |
112 | ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrdisable); | |
1da177e4 | 113 | ohci->hc_control &= ~OHCI_CTRL_RWE; |
1f7e1a3b | 114 | } |
1da177e4 | 115 | |
f197b2c5 DB |
116 | /* Suspend hub ... this is the "global (to this bus) suspend" mode, |
117 | * which doesn't imply ports will first be individually suspended. | |
118 | */ | |
1da177e4 LT |
119 | ohci->hc_control &= ~OHCI_CTRL_HCFS; |
120 | ohci->hc_control |= OHCI_USB_SUSPEND; | |
121 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
122 | (void) ohci_readl (ohci, &ohci->regs->control); | |
123 | ||
124 | /* no resumes until devices finish suspending */ | |
8d1a243b AS |
125 | if (!autostop) { |
126 | ohci->next_statechange = jiffies + msecs_to_jiffies (5); | |
127 | ohci->autostop = 0; | |
128 | } | |
d413984a | 129 | |
1da177e4 | 130 | done: |
1da177e4 LT |
131 | return status; |
132 | } | |
133 | ||
134 | static inline struct ed *find_head (struct ed *ed) | |
135 | { | |
136 | /* for bulk and control lists */ | |
137 | while (ed->ed_prev) | |
138 | ed = ed->ed_prev; | |
139 | return ed; | |
140 | } | |
141 | ||
142 | /* caller has locked the root hub */ | |
8d1a243b AS |
143 | static int ohci_rh_resume (struct ohci_hcd *ohci) |
144 | __releases(ohci->lock) | |
145 | __acquires(ohci->lock) | |
1da177e4 | 146 | { |
8d1a243b | 147 | struct usb_hcd *hcd = ohci_to_hcd (ohci); |
1da177e4 LT |
148 | u32 temp, enables; |
149 | int status = -EINPROGRESS; | |
8d1a243b | 150 | int autostopped = ohci->autostop; |
8de98402 | 151 | |
8d1a243b | 152 | ohci->autostop = 0; |
1da177e4 LT |
153 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); |
154 | ||
155 | if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { | |
f197b2c5 | 156 | /* this can happen after resuming a swsusp snapshot */ |
1da177e4 LT |
157 | if (hcd->state == HC_STATE_RESUMING) { |
158 | ohci_dbg (ohci, "BIOS/SMM active, control %03x\n", | |
159 | ohci->hc_control); | |
160 | status = -EBUSY; | |
161 | /* this happens when pmcore resumes HC then root */ | |
162 | } else { | |
163 | ohci_dbg (ohci, "duplicate resume\n"); | |
164 | status = 0; | |
165 | } | |
166 | } else switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
167 | case OHCI_USB_SUSPEND: | |
168 | ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); | |
169 | ohci->hc_control |= OHCI_USB_RESUME; | |
170 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
171 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
172 | ohci_dbg (ohci, "%s root hub\n", |
173 | autostopped ? "auto-start" : "resume"); | |
1da177e4 LT |
174 | break; |
175 | case OHCI_USB_RESUME: | |
176 | /* HCFS changes sometime after INTR_RD */ | |
1b7be3c0 | 177 | ohci_dbg(ohci, "%swakeup root hub\n", |
583ceada | 178 | autostopped ? "auto-" : ""); |
1da177e4 LT |
179 | break; |
180 | case OHCI_USB_OPER: | |
f197b2c5 DB |
181 | /* this can happen after resuming a swsusp snapshot */ |
182 | ohci_dbg (ohci, "snapshot resume? reinit\n"); | |
183 | status = -EBUSY; | |
1da177e4 LT |
184 | break; |
185 | default: /* RESET, we lost power */ | |
f197b2c5 | 186 | ohci_dbg (ohci, "lost power\n"); |
1da177e4 LT |
187 | status = -EBUSY; |
188 | } | |
1da177e4 | 189 | if (status == -EBUSY) { |
8d1a243b | 190 | if (!autostopped) { |
8d1a243b AS |
191 | spin_unlock_irq (&ohci->lock); |
192 | (void) ohci_init (ohci); | |
193 | status = ohci_restart (ohci); | |
194 | spin_lock_irq (&ohci->lock); | |
195 | } | |
196 | return status; | |
1da177e4 LT |
197 | } |
198 | if (status != -EINPROGRESS) | |
199 | return status; | |
8d1a243b AS |
200 | if (autostopped) |
201 | goto skip_resume; | |
202 | spin_unlock_irq (&ohci->lock); | |
1da177e4 | 203 | |
1da177e4 | 204 | /* Some controllers (lucent erratum) need extra-long delays */ |
f197b2c5 | 205 | msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); |
1da177e4 LT |
206 | |
207 | temp = ohci_readl (ohci, &ohci->regs->control); | |
208 | temp &= OHCI_CTRL_HCFS; | |
209 | if (temp != OHCI_USB_RESUME) { | |
210 | ohci_err (ohci, "controller won't resume\n"); | |
565402ba | 211 | spin_lock_irq(&ohci->lock); |
1da177e4 LT |
212 | return -EBUSY; |
213 | } | |
214 | ||
215 | /* disable old schedule state, reinit from scratch */ | |
216 | ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); | |
217 | ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent); | |
218 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); | |
219 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent); | |
220 | ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent); | |
221 | ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); | |
222 | ||
223 | /* Sometimes PCI D3 suspend trashes frame timings ... */ | |
224 | periodic_reinit (ohci); | |
225 | ||
8d1a243b AS |
226 | /* the following code is executed with ohci->lock held and |
227 | * irqs disabled if and only if autostopped is true | |
228 | */ | |
229 | ||
230 | skip_resume: | |
1da177e4 LT |
231 | /* interrupts might have been disabled */ |
232 | ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable); | |
233 | if (ohci->ed_rm_list) | |
234 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable); | |
1da177e4 LT |
235 | |
236 | /* Then re-enable operations */ | |
237 | ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control); | |
238 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
239 | if (!autostopped) |
240 | msleep (3); | |
1da177e4 | 241 | |
6a9062f3 DB |
242 | temp = ohci->hc_control; |
243 | temp &= OHCI_CTRL_RWC; | |
244 | temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; | |
1da177e4 LT |
245 | ohci->hc_control = temp; |
246 | ohci_writel (ohci, temp, &ohci->regs->control); | |
247 | (void) ohci_readl (ohci, &ohci->regs->control); | |
248 | ||
249 | /* TRSMRCY */ | |
8d1a243b AS |
250 | if (!autostopped) { |
251 | msleep (10); | |
252 | spin_lock_irq (&ohci->lock); | |
253 | } | |
254 | /* now ohci->lock is always held and irqs are always disabled */ | |
1da177e4 | 255 | |
d413984a DB |
256 | /* keep it alive for more than ~5x suspend + resume costs */ |
257 | ohci->next_statechange = jiffies + STATECHANGE_DELAY; | |
1da177e4 LT |
258 | |
259 | /* maybe turn schedules back on */ | |
260 | enables = 0; | |
261 | temp = 0; | |
262 | if (!ohci->ed_rm_list) { | |
263 | if (ohci->ed_controltail) { | |
264 | ohci_writel (ohci, | |
265 | find_head (ohci->ed_controltail)->dma, | |
266 | &ohci->regs->ed_controlhead); | |
267 | enables |= OHCI_CTRL_CLE; | |
268 | temp |= OHCI_CLF; | |
269 | } | |
270 | if (ohci->ed_bulktail) { | |
271 | ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma, | |
272 | &ohci->regs->ed_bulkhead); | |
273 | enables |= OHCI_CTRL_BLE; | |
274 | temp |= OHCI_BLF; | |
275 | } | |
276 | } | |
277 | if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) | |
278 | enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; | |
279 | if (enables) { | |
280 | ohci_dbg (ohci, "restarting schedules ... %08x\n", enables); | |
281 | ohci->hc_control |= enables; | |
282 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
283 | if (temp) | |
284 | ohci_writel (ohci, temp, &ohci->regs->cmdstatus); | |
285 | (void) ohci_readl (ohci, &ohci->regs->control); | |
286 | } | |
287 | ||
1da177e4 LT |
288 | return 0; |
289 | } | |
290 | ||
8d1a243b AS |
291 | static int ohci_bus_suspend (struct usb_hcd *hcd) |
292 | { | |
293 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
294 | int rc; | |
295 | ||
296 | spin_lock_irq (&ohci->lock); | |
297 | ||
298 | if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) | |
299 | rc = -ESHUTDOWN; | |
300 | else | |
301 | rc = ohci_rh_suspend (ohci, 0); | |
302 | spin_unlock_irq (&ohci->lock); | |
303 | return rc; | |
304 | } | |
305 | ||
306 | static int ohci_bus_resume (struct usb_hcd *hcd) | |
307 | { | |
308 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
309 | int rc; | |
310 | ||
311 | if (time_before (jiffies, ohci->next_statechange)) | |
312 | msleep(5); | |
313 | ||
314 | spin_lock_irq (&ohci->lock); | |
315 | ||
316 | if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) | |
317 | rc = -ESHUTDOWN; | |
318 | else | |
319 | rc = ohci_rh_resume (ohci); | |
320 | spin_unlock_irq (&ohci->lock); | |
321 | ||
322 | /* poll until we know a device is connected or we autostop */ | |
323 | if (rc == 0) | |
324 | usb_hcd_poll_rh_status(hcd); | |
325 | return rc; | |
326 | } | |
327 | ||
1f9fc882 AS |
328 | /* Carry out polling-, autostop-, and autoresume-related state changes */ |
329 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
330 | int any_connected) | |
331 | { | |
332 | int poll_rh = 1; | |
333 | ||
334 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
335 | ||
336 | case OHCI_USB_OPER: | |
337 | /* keep on polling until we know a device is connected | |
338 | * and RHSC is enabled */ | |
339 | if (!ohci->autostop) { | |
340 | if (any_connected || | |
341 | !device_may_wakeup(&ohci_to_hcd(ohci) | |
342 | ->self.root_hub->dev)) { | |
343 | if (ohci_readl(ohci, &ohci->regs->intrenable) & | |
344 | OHCI_INTR_RHSC) | |
345 | poll_rh = 0; | |
346 | } else { | |
347 | ohci->autostop = 1; | |
348 | ohci->next_statechange = jiffies + HZ; | |
349 | } | |
350 | ||
351 | /* if no devices have been attached for one second, autostop */ | |
352 | } else { | |
353 | if (changed || any_connected) { | |
354 | ohci->autostop = 0; | |
355 | ohci->next_statechange = jiffies + | |
356 | STATECHANGE_DELAY; | |
357 | } else if (time_after_eq(jiffies, | |
358 | ohci->next_statechange) | |
359 | && !ohci->ed_rm_list | |
360 | && !(ohci->hc_control & | |
361 | OHCI_SCHED_ENABLES)) { | |
362 | ohci_rh_suspend(ohci, 1); | |
363 | } | |
364 | } | |
365 | break; | |
366 | ||
367 | /* if there is a port change, autostart or ask to be resumed */ | |
368 | case OHCI_USB_SUSPEND: | |
369 | case OHCI_USB_RESUME: | |
370 | if (changed) { | |
371 | if (ohci->autostop) | |
372 | ohci_rh_resume(ohci); | |
373 | else | |
374 | usb_hcd_resume_root_hub(ohci_to_hcd(ohci)); | |
375 | } else { | |
376 | /* everything is idle, no need for polling */ | |
377 | poll_rh = 0; | |
378 | } | |
379 | break; | |
380 | } | |
381 | return poll_rh; | |
382 | } | |
383 | ||
384 | #else /* CONFIG_PM */ | |
385 | ||
386 | static inline int ohci_rh_resume(struct ohci_hcd *ohci) | |
387 | { | |
388 | return 0; | |
389 | } | |
390 | ||
391 | /* Carry out polling-related state changes. | |
392 | * autostop isn't used when CONFIG_PM is turned off. | |
393 | */ | |
394 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
395 | int any_connected) | |
396 | { | |
397 | int poll_rh = 1; | |
398 | ||
399 | /* keep on polling until RHSC is enabled */ | |
400 | if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC) | |
401 | poll_rh = 0; | |
402 | return poll_rh; | |
403 | } | |
404 | ||
8ad7fe16 | 405 | #endif /* CONFIG_PM */ |
1da177e4 LT |
406 | |
407 | /*-------------------------------------------------------------------------*/ | |
408 | ||
409 | /* build "status change" packet (one or two bytes) from HC registers */ | |
410 | ||
411 | static int | |
412 | ohci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
413 | { | |
414 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fdd13b36 | 415 | int i, changed = 0, length = 1; |
052ac01a | 416 | int any_connected = 0; |
1da177e4 LT |
417 | unsigned long flags; |
418 | ||
419 | spin_lock_irqsave (&ohci->lock, flags); | |
420 | ||
fdd13b36 DB |
421 | /* undocumented erratum seen on at least rev D */ |
422 | if ((ohci->flags & OHCI_QUIRK_AMD756) | |
423 | && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) { | |
424 | ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n", | |
1da177e4 LT |
425 | ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP); |
426 | /* retry later; "should not happen" */ | |
427 | goto done; | |
428 | } | |
429 | ||
430 | /* init status */ | |
431 | if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC)) | |
432 | buf [0] = changed = 1; | |
433 | else | |
434 | buf [0] = 0; | |
fdd13b36 | 435 | if (ohci->num_ports > 7) { |
1da177e4 LT |
436 | buf [1] = 0; |
437 | length++; | |
438 | } | |
439 | ||
440 | /* look at each port */ | |
fdd13b36 | 441 | for (i = 0; i < ohci->num_ports; i++) { |
1da177e4 LT |
442 | u32 status = roothub_portstatus (ohci, i); |
443 | ||
8d1a243b AS |
444 | /* can't autostop if ports are connected */ |
445 | any_connected |= (status & RH_PS_CCS); | |
446 | ||
1da177e4 LT |
447 | if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC |
448 | | RH_PS_OCIC | RH_PS_PRSC)) { | |
449 | changed = 1; | |
450 | if (i < 7) | |
451 | buf [0] |= 1 << (i + 1); | |
452 | else | |
453 | buf [1] |= 1 << (i - 7); | |
1da177e4 | 454 | } |
d413984a | 455 | } |
1da177e4 | 456 | |
1f9fc882 AS |
457 | hcd->poll_rh = ohci_root_hub_state_changes(ohci, changed, |
458 | any_connected); | |
d413984a | 459 | |
1da177e4 LT |
460 | done: |
461 | spin_unlock_irqrestore (&ohci->lock, flags); | |
462 | ||
1da177e4 LT |
463 | return changed ? length : 0; |
464 | } | |
465 | ||
466 | /*-------------------------------------------------------------------------*/ | |
467 | ||
468 | static void | |
469 | ohci_hub_descriptor ( | |
470 | struct ohci_hcd *ohci, | |
471 | struct usb_hub_descriptor *desc | |
472 | ) { | |
473 | u32 rh = roothub_a (ohci); | |
1da177e4 LT |
474 | u16 temp; |
475 | ||
476 | desc->bDescriptorType = 0x29; | |
477 | desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24; | |
478 | desc->bHubContrCurrent = 0; | |
479 | ||
fdd13b36 DB |
480 | desc->bNbrPorts = ohci->num_ports; |
481 | temp = 1 + (ohci->num_ports / 8); | |
1da177e4 LT |
482 | desc->bDescLength = 7 + 2 * temp; |
483 | ||
484 | temp = 0; | |
485 | if (rh & RH_A_NPS) /* no power switching? */ | |
486 | temp |= 0x0002; | |
dd9048af | 487 | if (rh & RH_A_PSM) /* per-port power switching? */ |
1da177e4 LT |
488 | temp |= 0x0001; |
489 | if (rh & RH_A_NOCP) /* no overcurrent reporting? */ | |
490 | temp |= 0x0010; | |
491 | else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */ | |
492 | temp |= 0x0008; | |
493 | desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp); | |
494 | ||
495 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
496 | rh = roothub_b (ohci); | |
b2134bcd | 497 | memset(desc->bitmap, 0xff, sizeof(desc->bitmap)); |
1da177e4 | 498 | desc->bitmap [0] = rh & RH_B_DR; |
fdd13b36 | 499 | if (ohci->num_ports > 7) { |
1da177e4 | 500 | desc->bitmap [1] = (rh & RH_B_DR) >> 8; |
b2134bcd | 501 | desc->bitmap [2] = 0xff; |
1da177e4 LT |
502 | } else |
503 | desc->bitmap [1] = 0xff; | |
504 | } | |
505 | ||
506 | /*-------------------------------------------------------------------------*/ | |
507 | ||
508 | #ifdef CONFIG_USB_OTG | |
509 | ||
510 | static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port) | |
511 | { | |
512 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
513 | u32 status; | |
514 | ||
515 | if (!port) | |
516 | return -EINVAL; | |
517 | port--; | |
518 | ||
519 | /* start port reset before HNP protocol times out */ | |
520 | status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]); | |
521 | if (!(status & RH_PS_CCS)) | |
522 | return -ENODEV; | |
523 | ||
524 | /* khubd will finish the reset later */ | |
525 | ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]); | |
526 | return 0; | |
527 | } | |
528 | ||
529 | static void start_hnp(struct ohci_hcd *ohci); | |
530 | ||
531 | #else | |
532 | ||
533 | #define ohci_start_port_reset NULL | |
534 | ||
535 | #endif | |
536 | ||
537 | /*-------------------------------------------------------------------------*/ | |
538 | ||
539 | ||
540 | /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, | |
541 | * not necessarily continuous ... to guard against resume signaling. | |
542 | * The short timeout is safe for non-root hubs, and is backward-compatible | |
543 | * with earlier Linux hosts. | |
544 | */ | |
545 | #ifdef CONFIG_USB_SUSPEND | |
546 | #define PORT_RESET_MSEC 50 | |
547 | #else | |
548 | #define PORT_RESET_MSEC 10 | |
549 | #endif | |
550 | ||
551 | /* this timer value might be vendor-specific ... */ | |
552 | #define PORT_RESET_HW_MSEC 10 | |
553 | ||
554 | /* wrap-aware logic morphed from <linux/jiffies.h> */ | |
555 | #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0) | |
556 | ||
557 | /* called from some task, normally khubd */ | |
23d10a9e | 558 | static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port) |
1da177e4 LT |
559 | { |
560 | __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port]; | |
561 | u32 temp; | |
562 | u16 now = ohci_readl(ohci, &ohci->regs->fmnumber); | |
563 | u16 reset_done = now + PORT_RESET_MSEC; | |
564 | ||
565 | /* build a "continuous enough" reset signal, with up to | |
566 | * 3msec gap between pulses. scheduler HZ==100 must work; | |
567 | * this might need to be deadline-scheduled. | |
568 | */ | |
569 | do { | |
570 | /* spin until any current reset finishes */ | |
571 | for (;;) { | |
572 | temp = ohci_readl (ohci, portstat); | |
23d10a9e TO |
573 | /* handle e.g. CardBus eject */ |
574 | if (temp == ~(u32)0) | |
575 | return -ESHUTDOWN; | |
1da177e4 LT |
576 | if (!(temp & RH_PS_PRS)) |
577 | break; | |
578 | udelay (500); | |
dd9048af | 579 | } |
1da177e4 LT |
580 | |
581 | if (!(temp & RH_PS_CCS)) | |
582 | break; | |
583 | if (temp & RH_PS_PRSC) | |
584 | ohci_writel (ohci, RH_PS_PRSC, portstat); | |
585 | ||
586 | /* start the next reset, sleep till it's probably done */ | |
587 | ohci_writel (ohci, RH_PS_PRS, portstat); | |
588 | msleep(PORT_RESET_HW_MSEC); | |
589 | now = ohci_readl(ohci, &ohci->regs->fmnumber); | |
590 | } while (tick_before(now, reset_done)); | |
591 | /* caller synchronizes using PRSC */ | |
23d10a9e TO |
592 | |
593 | return 0; | |
1da177e4 LT |
594 | } |
595 | ||
596 | static int ohci_hub_control ( | |
597 | struct usb_hcd *hcd, | |
598 | u16 typeReq, | |
599 | u16 wValue, | |
600 | u16 wIndex, | |
601 | char *buf, | |
602 | u16 wLength | |
603 | ) { | |
604 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
605 | int ports = hcd_to_bus (hcd)->root_hub->maxchild; | |
606 | u32 temp; | |
607 | int retval = 0; | |
608 | ||
8de98402 BH |
609 | if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) |
610 | return -ESHUTDOWN; | |
611 | ||
1da177e4 LT |
612 | switch (typeReq) { |
613 | case ClearHubFeature: | |
614 | switch (wValue) { | |
615 | case C_HUB_OVER_CURRENT: | |
616 | ohci_writel (ohci, RH_HS_OCIC, | |
617 | &ohci->regs->roothub.status); | |
618 | case C_HUB_LOCAL_POWER: | |
619 | break; | |
620 | default: | |
621 | goto error; | |
622 | } | |
623 | break; | |
624 | case ClearPortFeature: | |
625 | if (!wIndex || wIndex > ports) | |
626 | goto error; | |
627 | wIndex--; | |
628 | ||
629 | switch (wValue) { | |
630 | case USB_PORT_FEAT_ENABLE: | |
631 | temp = RH_PS_CCS; | |
632 | break; | |
633 | case USB_PORT_FEAT_C_ENABLE: | |
634 | temp = RH_PS_PESC; | |
635 | break; | |
636 | case USB_PORT_FEAT_SUSPEND: | |
637 | temp = RH_PS_POCI; | |
1da177e4 LT |
638 | break; |
639 | case USB_PORT_FEAT_C_SUSPEND: | |
640 | temp = RH_PS_PSSC; | |
641 | break; | |
642 | case USB_PORT_FEAT_POWER: | |
643 | temp = RH_PS_LSDA; | |
644 | break; | |
645 | case USB_PORT_FEAT_C_CONNECTION: | |
646 | temp = RH_PS_CSC; | |
647 | break; | |
648 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
649 | temp = RH_PS_OCIC; | |
650 | break; | |
651 | case USB_PORT_FEAT_C_RESET: | |
652 | temp = RH_PS_PRSC; | |
653 | break; | |
654 | default: | |
655 | goto error; | |
656 | } | |
657 | ohci_writel (ohci, temp, | |
658 | &ohci->regs->roothub.portstatus [wIndex]); | |
659 | // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]); | |
660 | break; | |
661 | case GetHubDescriptor: | |
662 | ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf); | |
663 | break; | |
664 | case GetHubStatus: | |
665 | temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE); | |
92164c5d | 666 | put_unaligned(cpu_to_le32 (temp), (__le32 *) buf); |
1da177e4 LT |
667 | break; |
668 | case GetPortStatus: | |
669 | if (!wIndex || wIndex > ports) | |
670 | goto error; | |
671 | wIndex--; | |
672 | temp = roothub_portstatus (ohci, wIndex); | |
92164c5d | 673 | put_unaligned(cpu_to_le32 (temp), (__le32 *) buf); |
1da177e4 LT |
674 | |
675 | #ifndef OHCI_VERBOSE_DEBUG | |
676 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ | |
677 | #endif | |
678 | dbg_port (ohci, "GetStatus", wIndex, temp); | |
679 | break; | |
680 | case SetHubFeature: | |
681 | switch (wValue) { | |
682 | case C_HUB_OVER_CURRENT: | |
683 | // FIXME: this can be cleared, yes? | |
684 | case C_HUB_LOCAL_POWER: | |
685 | break; | |
686 | default: | |
687 | goto error; | |
688 | } | |
689 | break; | |
690 | case SetPortFeature: | |
691 | if (!wIndex || wIndex > ports) | |
692 | goto error; | |
693 | wIndex--; | |
694 | switch (wValue) { | |
695 | case USB_PORT_FEAT_SUSPEND: | |
696 | #ifdef CONFIG_USB_OTG | |
697 | if (hcd->self.otg_port == (wIndex + 1) | |
698 | && hcd->self.b_hnp_enable) | |
699 | start_hnp(ohci); | |
700 | else | |
701 | #endif | |
702 | ohci_writel (ohci, RH_PS_PSS, | |
703 | &ohci->regs->roothub.portstatus [wIndex]); | |
704 | break; | |
705 | case USB_PORT_FEAT_POWER: | |
706 | ohci_writel (ohci, RH_PS_PPS, | |
707 | &ohci->regs->roothub.portstatus [wIndex]); | |
708 | break; | |
709 | case USB_PORT_FEAT_RESET: | |
23d10a9e | 710 | retval = root_port_reset (ohci, wIndex); |
1da177e4 LT |
711 | break; |
712 | default: | |
713 | goto error; | |
714 | } | |
715 | break; | |
716 | ||
717 | default: | |
718 | error: | |
719 | /* "protocol stall" on error */ | |
720 | retval = -EPIPE; | |
721 | } | |
722 | return retval; | |
723 | } | |
724 |