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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * OHCI HCD (Host Controller Driver) for USB. | |
3 | * | |
4 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> | |
5 | * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net> | |
6 | * | |
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" : "", \ | |
26 | \ | |
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" : "", \ | |
32 | \ | |
33 | (temp & RH_PS_PES) ? " PES" : "", \ | |
34 | (temp & RH_PS_CCS) ? " CCS" : "" \ | |
35 | ); | |
36 | ||
37 | /*-------------------------------------------------------------------------*/ | |
38 | ||
39 | #if defined(CONFIG_USB_SUSPEND) || defined(CONFIG_PM) | |
40 | ||
41 | #define OHCI_SCHED_ENABLES \ | |
42 | (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE) | |
43 | ||
44 | static void dl_done_list (struct ohci_hcd *, struct pt_regs *); | |
45 | static void finish_unlinks (struct ohci_hcd *, u16 , struct pt_regs *); | |
46 | static int ohci_restart (struct ohci_hcd *ohci); | |
47 | ||
48 | static int ohci_hub_suspend (struct usb_hcd *hcd) | |
49 | { | |
50 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
51 | int status = 0; | |
52 | unsigned long flags; | |
53 | ||
54 | spin_lock_irqsave (&ohci->lock, flags); | |
55 | ||
56 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); | |
57 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
58 | case OHCI_USB_RESUME: | |
59 | ohci_dbg (ohci, "resume/suspend?\n"); | |
60 | ohci->hc_control &= ~OHCI_CTRL_HCFS; | |
61 | ohci->hc_control |= OHCI_USB_RESET; | |
62 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
63 | (void) ohci_readl (ohci, &ohci->regs->control); | |
64 | /* FALL THROUGH */ | |
65 | case OHCI_USB_RESET: | |
66 | status = -EBUSY; | |
67 | ohci_dbg (ohci, "needs reinit!\n"); | |
68 | goto done; | |
69 | case OHCI_USB_SUSPEND: | |
70 | ohci_dbg (ohci, "already suspended\n"); | |
71 | goto done; | |
72 | } | |
73 | ohci_dbg (ohci, "suspend root hub\n"); | |
74 | ||
75 | /* First stop any processing */ | |
76 | hcd->state = HC_STATE_QUIESCING; | |
77 | if (ohci->hc_control & OHCI_SCHED_ENABLES) { | |
78 | int limit; | |
79 | ||
80 | ohci->hc_control &= ~OHCI_SCHED_ENABLES; | |
81 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
82 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); | |
83 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus); | |
84 | ||
85 | /* sched disables take effect on the next frame, | |
86 | * then the last WDH could take 6+ msec | |
87 | */ | |
88 | ohci_dbg (ohci, "stopping schedules ...\n"); | |
89 | limit = 2000; | |
90 | while (limit > 0) { | |
91 | udelay (250); | |
92 | limit =- 250; | |
93 | if (ohci_readl (ohci, &ohci->regs->intrstatus) | |
94 | & OHCI_INTR_SF) | |
95 | break; | |
96 | } | |
97 | dl_done_list (ohci, NULL); | |
98 | mdelay (7); | |
99 | } | |
100 | dl_done_list (ohci, NULL); | |
101 | finish_unlinks (ohci, ohci_frame_no(ohci), NULL); | |
102 | ohci_writel (ohci, ohci_readl (ohci, &ohci->regs->intrstatus), | |
103 | &ohci->regs->intrstatus); | |
104 | ||
105 | /* maybe resume can wake root hub */ | |
106 | if (hcd->remote_wakeup) | |
107 | ohci->hc_control |= OHCI_CTRL_RWE; | |
108 | else | |
109 | ohci->hc_control &= ~OHCI_CTRL_RWE; | |
110 | ||
111 | /* Suspend hub */ | |
112 | ohci->hc_control &= ~OHCI_CTRL_HCFS; | |
113 | ohci->hc_control |= OHCI_USB_SUSPEND; | |
114 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
115 | (void) ohci_readl (ohci, &ohci->regs->control); | |
116 | ||
117 | /* no resumes until devices finish suspending */ | |
118 | ohci->next_statechange = jiffies + msecs_to_jiffies (5); | |
119 | ||
120 | done: | |
121 | if (status == 0) | |
122 | hcd->state = HC_STATE_SUSPENDED; | |
123 | spin_unlock_irqrestore (&ohci->lock, flags); | |
124 | return status; | |
125 | } | |
126 | ||
127 | static inline struct ed *find_head (struct ed *ed) | |
128 | { | |
129 | /* for bulk and control lists */ | |
130 | while (ed->ed_prev) | |
131 | ed = ed->ed_prev; | |
132 | return ed; | |
133 | } | |
134 | ||
135 | /* caller has locked the root hub */ | |
136 | static int ohci_hub_resume (struct usb_hcd *hcd) | |
137 | { | |
138 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
139 | u32 temp, enables; | |
140 | int status = -EINPROGRESS; | |
141 | ||
142 | if (time_before (jiffies, ohci->next_statechange)) | |
143 | msleep(5); | |
144 | ||
145 | spin_lock_irq (&ohci->lock); | |
146 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); | |
147 | ||
148 | if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { | |
149 | /* this can happen after suspend-to-disk */ | |
150 | if (hcd->state == HC_STATE_RESUMING) { | |
151 | ohci_dbg (ohci, "BIOS/SMM active, control %03x\n", | |
152 | ohci->hc_control); | |
153 | status = -EBUSY; | |
154 | /* this happens when pmcore resumes HC then root */ | |
155 | } else { | |
156 | ohci_dbg (ohci, "duplicate resume\n"); | |
157 | status = 0; | |
158 | } | |
159 | } else switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
160 | case OHCI_USB_SUSPEND: | |
161 | ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); | |
162 | ohci->hc_control |= OHCI_USB_RESUME; | |
163 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
164 | (void) ohci_readl (ohci, &ohci->regs->control); | |
165 | ohci_dbg (ohci, "resume root hub\n"); | |
166 | break; | |
167 | case OHCI_USB_RESUME: | |
168 | /* HCFS changes sometime after INTR_RD */ | |
169 | ohci_info (ohci, "wakeup\n"); | |
170 | break; | |
171 | case OHCI_USB_OPER: | |
172 | ohci_dbg (ohci, "already resumed\n"); | |
173 | status = 0; | |
174 | break; | |
175 | default: /* RESET, we lost power */ | |
176 | ohci_dbg (ohci, "root hub hardware reset\n"); | |
177 | status = -EBUSY; | |
178 | } | |
179 | spin_unlock_irq (&ohci->lock); | |
180 | if (status == -EBUSY) { | |
181 | (void) ohci_init (ohci); | |
182 | return ohci_restart (ohci); | |
183 | } | |
184 | if (status != -EINPROGRESS) | |
185 | return status; | |
186 | ||
fdd13b36 | 187 | temp = ohci->num_ports; |
1da177e4 LT |
188 | enables = 0; |
189 | while (temp--) { | |
190 | u32 stat = ohci_readl (ohci, | |
191 | &ohci->regs->roothub.portstatus [temp]); | |
192 | ||
193 | /* force global, not selective, resume */ | |
194 | if (!(stat & RH_PS_PSS)) | |
195 | continue; | |
196 | ohci_writel (ohci, RH_PS_POCI, | |
197 | &ohci->regs->roothub.portstatus [temp]); | |
198 | } | |
199 | ||
200 | /* Some controllers (lucent erratum) need extra-long delays */ | |
201 | hcd->state = HC_STATE_RESUMING; | |
202 | mdelay (20 /* usb 11.5.1.10 */ + 15); | |
203 | ||
204 | temp = ohci_readl (ohci, &ohci->regs->control); | |
205 | temp &= OHCI_CTRL_HCFS; | |
206 | if (temp != OHCI_USB_RESUME) { | |
207 | ohci_err (ohci, "controller won't resume\n"); | |
208 | return -EBUSY; | |
209 | } | |
210 | ||
211 | /* disable old schedule state, reinit from scratch */ | |
212 | ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); | |
213 | ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent); | |
214 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); | |
215 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent); | |
216 | ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent); | |
217 | ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); | |
218 | ||
219 | /* Sometimes PCI D3 suspend trashes frame timings ... */ | |
220 | periodic_reinit (ohci); | |
221 | ||
222 | /* interrupts might have been disabled */ | |
223 | ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable); | |
224 | if (ohci->ed_rm_list) | |
225 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable); | |
226 | ohci_writel (ohci, ohci_readl (ohci, &ohci->regs->intrstatus), | |
227 | &ohci->regs->intrstatus); | |
228 | ||
229 | /* Then re-enable operations */ | |
230 | ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control); | |
231 | (void) ohci_readl (ohci, &ohci->regs->control); | |
232 | msleep (3); | |
233 | ||
234 | temp = OHCI_CONTROL_INIT | OHCI_USB_OPER; | |
235 | if (hcd->can_wakeup) | |
236 | temp |= OHCI_CTRL_RWC; | |
237 | ohci->hc_control = temp; | |
238 | ohci_writel (ohci, temp, &ohci->regs->control); | |
239 | (void) ohci_readl (ohci, &ohci->regs->control); | |
240 | ||
241 | /* TRSMRCY */ | |
242 | msleep (10); | |
243 | ||
244 | /* keep it alive for ~5x suspend + resume costs */ | |
245 | ohci->next_statechange = jiffies + msecs_to_jiffies (250); | |
246 | ||
247 | /* maybe turn schedules back on */ | |
248 | enables = 0; | |
249 | temp = 0; | |
250 | if (!ohci->ed_rm_list) { | |
251 | if (ohci->ed_controltail) { | |
252 | ohci_writel (ohci, | |
253 | find_head (ohci->ed_controltail)->dma, | |
254 | &ohci->regs->ed_controlhead); | |
255 | enables |= OHCI_CTRL_CLE; | |
256 | temp |= OHCI_CLF; | |
257 | } | |
258 | if (ohci->ed_bulktail) { | |
259 | ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma, | |
260 | &ohci->regs->ed_bulkhead); | |
261 | enables |= OHCI_CTRL_BLE; | |
262 | temp |= OHCI_BLF; | |
263 | } | |
264 | } | |
265 | if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) | |
266 | enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; | |
267 | if (enables) { | |
268 | ohci_dbg (ohci, "restarting schedules ... %08x\n", enables); | |
269 | ohci->hc_control |= enables; | |
270 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
271 | if (temp) | |
272 | ohci_writel (ohci, temp, &ohci->regs->cmdstatus); | |
273 | (void) ohci_readl (ohci, &ohci->regs->control); | |
274 | } | |
275 | ||
276 | hcd->state = HC_STATE_RUNNING; | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static void ohci_rh_resume (void *_hcd) | |
281 | { | |
282 | struct usb_hcd *hcd = _hcd; | |
283 | ||
284 | usb_lock_device (hcd->self.root_hub); | |
285 | (void) ohci_hub_resume (hcd); | |
286 | usb_unlock_device (hcd->self.root_hub); | |
287 | } | |
288 | ||
289 | #else | |
290 | ||
291 | static void ohci_rh_resume (void *_hcd) | |
292 | { | |
293 | struct ohci_hcd *ohci = hcd_to_ohci (_hcd); | |
294 | ohci_dbg(ohci, "rh_resume ??\n"); | |
295 | } | |
296 | ||
297 | #endif /* CONFIG_USB_SUSPEND || CONFIG_PM */ | |
298 | ||
299 | /*-------------------------------------------------------------------------*/ | |
300 | ||
301 | /* build "status change" packet (one or two bytes) from HC registers */ | |
302 | ||
303 | static int | |
304 | ohci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
305 | { | |
306 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fdd13b36 | 307 | int i, changed = 0, length = 1; |
1da177e4 LT |
308 | int can_suspend = hcd->can_wakeup; |
309 | unsigned long flags; | |
310 | ||
311 | spin_lock_irqsave (&ohci->lock, flags); | |
312 | ||
313 | /* handle autosuspended root: finish resuming before | |
314 | * letting khubd or root hub timer see state changes. | |
315 | */ | |
316 | if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER | |
317 | || !HC_IS_RUNNING(hcd->state)) { | |
318 | can_suspend = 0; | |
319 | goto done; | |
320 | } | |
321 | ||
fdd13b36 DB |
322 | /* undocumented erratum seen on at least rev D */ |
323 | if ((ohci->flags & OHCI_QUIRK_AMD756) | |
324 | && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) { | |
325 | ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n", | |
1da177e4 LT |
326 | ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP); |
327 | /* retry later; "should not happen" */ | |
328 | goto done; | |
329 | } | |
330 | ||
331 | /* init status */ | |
332 | if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC)) | |
333 | buf [0] = changed = 1; | |
334 | else | |
335 | buf [0] = 0; | |
fdd13b36 | 336 | if (ohci->num_ports > 7) { |
1da177e4 LT |
337 | buf [1] = 0; |
338 | length++; | |
339 | } | |
340 | ||
341 | /* look at each port */ | |
fdd13b36 | 342 | for (i = 0; i < ohci->num_ports; i++) { |
1da177e4 LT |
343 | u32 status = roothub_portstatus (ohci, i); |
344 | ||
345 | if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC | |
346 | | RH_PS_OCIC | RH_PS_PRSC)) { | |
347 | changed = 1; | |
348 | if (i < 7) | |
349 | buf [0] |= 1 << (i + 1); | |
350 | else | |
351 | buf [1] |= 1 << (i - 7); | |
352 | continue; | |
353 | } | |
354 | ||
355 | /* can suspend if no ports are enabled; or if all all | |
356 | * enabled ports are suspended AND remote wakeup is on. | |
357 | */ | |
358 | if (!(status & RH_PS_CCS)) | |
359 | continue; | |
360 | if ((status & RH_PS_PSS) && hcd->remote_wakeup) | |
361 | continue; | |
362 | can_suspend = 0; | |
363 | } | |
364 | done: | |
365 | spin_unlock_irqrestore (&ohci->lock, flags); | |
366 | ||
367 | #ifdef CONFIG_PM | |
368 | /* save power by suspending idle root hubs; | |
369 | * INTR_RD wakes us when there's work | |
370 | * NOTE: if we can do this, we don't need a root hub timer! | |
371 | */ | |
372 | if (can_suspend | |
373 | && !changed | |
374 | && !ohci->ed_rm_list | |
375 | && ((OHCI_CTRL_HCFS | OHCI_SCHED_ENABLES) | |
376 | & ohci->hc_control) | |
377 | == OHCI_USB_OPER | |
378 | && time_after (jiffies, ohci->next_statechange) | |
379 | && usb_trylock_device (hcd->self.root_hub) | |
380 | ) { | |
381 | ohci_vdbg (ohci, "autosuspend\n"); | |
382 | (void) ohci_hub_suspend (hcd); | |
383 | hcd->state = HC_STATE_RUNNING; | |
384 | usb_unlock_device (hcd->self.root_hub); | |
385 | } | |
386 | #endif | |
387 | ||
388 | return changed ? length : 0; | |
389 | } | |
390 | ||
391 | /*-------------------------------------------------------------------------*/ | |
392 | ||
393 | static void | |
394 | ohci_hub_descriptor ( | |
395 | struct ohci_hcd *ohci, | |
396 | struct usb_hub_descriptor *desc | |
397 | ) { | |
398 | u32 rh = roothub_a (ohci); | |
1da177e4 LT |
399 | u16 temp; |
400 | ||
401 | desc->bDescriptorType = 0x29; | |
402 | desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24; | |
403 | desc->bHubContrCurrent = 0; | |
404 | ||
fdd13b36 DB |
405 | desc->bNbrPorts = ohci->num_ports; |
406 | temp = 1 + (ohci->num_ports / 8); | |
1da177e4 LT |
407 | desc->bDescLength = 7 + 2 * temp; |
408 | ||
409 | temp = 0; | |
410 | if (rh & RH_A_NPS) /* no power switching? */ | |
411 | temp |= 0x0002; | |
412 | if (rh & RH_A_PSM) /* per-port power switching? */ | |
413 | temp |= 0x0001; | |
414 | if (rh & RH_A_NOCP) /* no overcurrent reporting? */ | |
415 | temp |= 0x0010; | |
416 | else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */ | |
417 | temp |= 0x0008; | |
418 | desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp); | |
419 | ||
420 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
421 | rh = roothub_b (ohci); | |
b2134bcd | 422 | memset(desc->bitmap, 0xff, sizeof(desc->bitmap)); |
1da177e4 | 423 | desc->bitmap [0] = rh & RH_B_DR; |
fdd13b36 | 424 | if (ohci->num_ports > 7) { |
1da177e4 | 425 | desc->bitmap [1] = (rh & RH_B_DR) >> 8; |
b2134bcd | 426 | desc->bitmap [2] = 0xff; |
1da177e4 LT |
427 | } else |
428 | desc->bitmap [1] = 0xff; | |
429 | } | |
430 | ||
431 | /*-------------------------------------------------------------------------*/ | |
432 | ||
433 | #ifdef CONFIG_USB_OTG | |
434 | ||
435 | static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port) | |
436 | { | |
437 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
438 | u32 status; | |
439 | ||
440 | if (!port) | |
441 | return -EINVAL; | |
442 | port--; | |
443 | ||
444 | /* start port reset before HNP protocol times out */ | |
445 | status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]); | |
446 | if (!(status & RH_PS_CCS)) | |
447 | return -ENODEV; | |
448 | ||
449 | /* khubd will finish the reset later */ | |
450 | ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | static void start_hnp(struct ohci_hcd *ohci); | |
455 | ||
456 | #else | |
457 | ||
458 | #define ohci_start_port_reset NULL | |
459 | ||
460 | #endif | |
461 | ||
462 | /*-------------------------------------------------------------------------*/ | |
463 | ||
464 | ||
465 | /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, | |
466 | * not necessarily continuous ... to guard against resume signaling. | |
467 | * The short timeout is safe for non-root hubs, and is backward-compatible | |
468 | * with earlier Linux hosts. | |
469 | */ | |
470 | #ifdef CONFIG_USB_SUSPEND | |
471 | #define PORT_RESET_MSEC 50 | |
472 | #else | |
473 | #define PORT_RESET_MSEC 10 | |
474 | #endif | |
475 | ||
476 | /* this timer value might be vendor-specific ... */ | |
477 | #define PORT_RESET_HW_MSEC 10 | |
478 | ||
479 | /* wrap-aware logic morphed from <linux/jiffies.h> */ | |
480 | #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0) | |
481 | ||
482 | /* called from some task, normally khubd */ | |
483 | static inline void root_port_reset (struct ohci_hcd *ohci, unsigned port) | |
484 | { | |
485 | __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port]; | |
486 | u32 temp; | |
487 | u16 now = ohci_readl(ohci, &ohci->regs->fmnumber); | |
488 | u16 reset_done = now + PORT_RESET_MSEC; | |
489 | ||
490 | /* build a "continuous enough" reset signal, with up to | |
491 | * 3msec gap between pulses. scheduler HZ==100 must work; | |
492 | * this might need to be deadline-scheduled. | |
493 | */ | |
494 | do { | |
495 | /* spin until any current reset finishes */ | |
496 | for (;;) { | |
497 | temp = ohci_readl (ohci, portstat); | |
498 | if (!(temp & RH_PS_PRS)) | |
499 | break; | |
500 | udelay (500); | |
501 | } | |
502 | ||
503 | if (!(temp & RH_PS_CCS)) | |
504 | break; | |
505 | if (temp & RH_PS_PRSC) | |
506 | ohci_writel (ohci, RH_PS_PRSC, portstat); | |
507 | ||
508 | /* start the next reset, sleep till it's probably done */ | |
509 | ohci_writel (ohci, RH_PS_PRS, portstat); | |
510 | msleep(PORT_RESET_HW_MSEC); | |
511 | now = ohci_readl(ohci, &ohci->regs->fmnumber); | |
512 | } while (tick_before(now, reset_done)); | |
513 | /* caller synchronizes using PRSC */ | |
514 | } | |
515 | ||
516 | static int ohci_hub_control ( | |
517 | struct usb_hcd *hcd, | |
518 | u16 typeReq, | |
519 | u16 wValue, | |
520 | u16 wIndex, | |
521 | char *buf, | |
522 | u16 wLength | |
523 | ) { | |
524 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
525 | int ports = hcd_to_bus (hcd)->root_hub->maxchild; | |
526 | u32 temp; | |
527 | int retval = 0; | |
528 | ||
529 | switch (typeReq) { | |
530 | case ClearHubFeature: | |
531 | switch (wValue) { | |
532 | case C_HUB_OVER_CURRENT: | |
533 | ohci_writel (ohci, RH_HS_OCIC, | |
534 | &ohci->regs->roothub.status); | |
535 | case C_HUB_LOCAL_POWER: | |
536 | break; | |
537 | default: | |
538 | goto error; | |
539 | } | |
540 | break; | |
541 | case ClearPortFeature: | |
542 | if (!wIndex || wIndex > ports) | |
543 | goto error; | |
544 | wIndex--; | |
545 | ||
546 | switch (wValue) { | |
547 | case USB_PORT_FEAT_ENABLE: | |
548 | temp = RH_PS_CCS; | |
549 | break; | |
550 | case USB_PORT_FEAT_C_ENABLE: | |
551 | temp = RH_PS_PESC; | |
552 | break; | |
553 | case USB_PORT_FEAT_SUSPEND: | |
554 | temp = RH_PS_POCI; | |
555 | if ((ohci->hc_control & OHCI_CTRL_HCFS) | |
556 | != OHCI_USB_OPER) | |
557 | schedule_work (&ohci->rh_resume); | |
558 | break; | |
559 | case USB_PORT_FEAT_C_SUSPEND: | |
560 | temp = RH_PS_PSSC; | |
561 | break; | |
562 | case USB_PORT_FEAT_POWER: | |
563 | temp = RH_PS_LSDA; | |
564 | break; | |
565 | case USB_PORT_FEAT_C_CONNECTION: | |
566 | temp = RH_PS_CSC; | |
567 | break; | |
568 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
569 | temp = RH_PS_OCIC; | |
570 | break; | |
571 | case USB_PORT_FEAT_C_RESET: | |
572 | temp = RH_PS_PRSC; | |
573 | break; | |
574 | default: | |
575 | goto error; | |
576 | } | |
577 | ohci_writel (ohci, temp, | |
578 | &ohci->regs->roothub.portstatus [wIndex]); | |
579 | // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]); | |
580 | break; | |
581 | case GetHubDescriptor: | |
582 | ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf); | |
583 | break; | |
584 | case GetHubStatus: | |
585 | temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE); | |
586 | *(__le32 *) buf = cpu_to_le32 (temp); | |
587 | break; | |
588 | case GetPortStatus: | |
589 | if (!wIndex || wIndex > ports) | |
590 | goto error; | |
591 | wIndex--; | |
592 | temp = roothub_portstatus (ohci, wIndex); | |
593 | *(__le32 *) buf = cpu_to_le32 (temp); | |
594 | ||
595 | #ifndef OHCI_VERBOSE_DEBUG | |
596 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ | |
597 | #endif | |
598 | dbg_port (ohci, "GetStatus", wIndex, temp); | |
599 | break; | |
600 | case SetHubFeature: | |
601 | switch (wValue) { | |
602 | case C_HUB_OVER_CURRENT: | |
603 | // FIXME: this can be cleared, yes? | |
604 | case C_HUB_LOCAL_POWER: | |
605 | break; | |
606 | default: | |
607 | goto error; | |
608 | } | |
609 | break; | |
610 | case SetPortFeature: | |
611 | if (!wIndex || wIndex > ports) | |
612 | goto error; | |
613 | wIndex--; | |
614 | switch (wValue) { | |
615 | case USB_PORT_FEAT_SUSPEND: | |
616 | #ifdef CONFIG_USB_OTG | |
617 | if (hcd->self.otg_port == (wIndex + 1) | |
618 | && hcd->self.b_hnp_enable) | |
619 | start_hnp(ohci); | |
620 | else | |
621 | #endif | |
622 | ohci_writel (ohci, RH_PS_PSS, | |
623 | &ohci->regs->roothub.portstatus [wIndex]); | |
624 | break; | |
625 | case USB_PORT_FEAT_POWER: | |
626 | ohci_writel (ohci, RH_PS_PPS, | |
627 | &ohci->regs->roothub.portstatus [wIndex]); | |
628 | break; | |
629 | case USB_PORT_FEAT_RESET: | |
630 | root_port_reset (ohci, wIndex); | |
631 | break; | |
632 | default: | |
633 | goto error; | |
634 | } | |
635 | break; | |
636 | ||
637 | default: | |
638 | error: | |
639 | /* "protocol stall" on error */ | |
640 | retval = -EPIPE; | |
641 | } | |
642 | return retval; | |
643 | } | |
644 |